EP0431705A1 - Dispositif de fermeture protégé - Google Patents

Dispositif de fermeture protégé Download PDF

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Publication number
EP0431705A1
EP0431705A1 EP90203194A EP90203194A EP0431705A1 EP 0431705 A1 EP0431705 A1 EP 0431705A1 EP 90203194 A EP90203194 A EP 90203194A EP 90203194 A EP90203194 A EP 90203194A EP 0431705 A1 EP0431705 A1 EP 0431705A1
Authority
EP
European Patent Office
Prior art keywords
circuit
motor
induction coil
guiding
conductor
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
EP90203194A
Other languages
German (de)
English (en)
Other versions
EP0431705B1 (fr
Inventor
Hendricus Hubertus Antonius Bouwmans
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.)
HERAS HOLDING CO BV
Original Assignee
HERAS HOLDING BV
HERAS HOLDING CO BV
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 HERAS HOLDING BV, HERAS HOLDING CO BV filed Critical HERAS HOLDING BV
Publication of EP0431705A1 publication Critical patent/EP0431705A1/fr
Application granted granted Critical
Publication of EP0431705B1 publication Critical patent/EP0431705B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/40—Safety devices, e.g. detection of obstructions or end positions
    • E05F15/42—Detection using safety edges
    • E05F15/44—Detection using safety edges responsive to changes in electrical conductivity
    • E05F2015/447—Detection using safety edges responsive to changes in electrical conductivity using switches in serial arrangement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches
    • H01H2003/146—Cushion or mat switches being normally closed

Definitions

  • the invention relates to a device for closing a passageway, which device comprises a closing body that can be moved by means of a motor along a guiding from a closed position to an open position and vice versa, wherein the body is provided with a safety sensor interrupting the motor feed, is incorporated in a circuit with separate feed connected fixedly to the movable body and the circuit is provided with a conductor which extends in the direction of movement and which is guided slidably along at least one fixed coil disposed close to the guiding, which coil is a part of the control circuit for the motor.
  • Such a circuit is frequently used in electrically driven doors such as elevator doors, fences for closing entrances, which doors or fences are provided on the end post with an end post sensor. Pressing in this end post sensor causes stopping of the drive motor, whereby people and objects cannot be pinned by the closing door or closing fence.
  • the known systems operate on the measuring of a resistance or power change when the sensor is activated. These systems are very sensitive to the dimensions of the circuit and are therefore not universal for different applications.
  • the invention has for its object to improve the safety system such that the above mentioned drawbacks do not occur.
  • the device according to the invention is distinguished in that the safety sensor comprises one or more break contacts connected in series which are connected in series with acapacitor in the circuit.
  • the invention is based on the idea that the frequency change has to be measured.
  • the circuit feed is preferably brought about by a second induction coil which is likewise disposed stationary close to the guiding.
  • a voltage source arranged on the moving body becomes superfluous, which further simplifies the whole device.
  • the number of windings on the first induction coil differ from that of the windings on the second induction coil. In this way the frequency change of the first induction coil to be detected is changed proportionally and made insensitive to possible radio disturbances.
  • a resistance increasing member for instance a capacitor, diode or resistor, is incorporated in the circuit such that when short-circuiting occurs a clearly detectable difference in frequency can be detected, whereby the feed of the drive motor can likewise be rendered inoperative.
  • Shown in fig. 1 is a slide fence consisting of a main beam 1 through which are arranged bars 2 which are mutually coupled at the top by an upper beam 3.
  • This whole rectangular construction is considered as a movable body which is reciprocally slidable in the direction of the arrow P1 relative to fixedly arranged posts 4 and 5.
  • guide wheels 6, 7 are arranged in the posts 4 and 5, wherein wheel 7 is driven by an electric motor with transmission.
  • Motor 8 is reversible so that the fence moves to the left in the one rotational direction of motor 8 and to the right in the other rotational direction in order respectively to close and open the passageway defined by post 4 and a fixed post 10.
  • the end post 11 is embodied with a number of break contacts connected in series or otherwise in order to break an electric circuit.
  • the known electric circuit is a component of a control circuit connected to the motor 8 so that a signal transfer has to be effected between the electric circuit part moving along with the fence 1 and the electric circuit part present on the post 5.
  • the electric circuit according to the invention is elucidated in schematic form with reference to fig. 2.
  • the end post 11 is embodied with a number of break contacts 12 connected in series which together with a conductor 13 form a closed circuit.
  • the conductor 13 is shown schematically in fig. 1 with the broken line. This extends in the direction of movement P1 parallel to the beam 1.
  • the lower conductor 14 is spanned such that it can be passed along two induction coils.
  • a capacitor 15 is arranged at the connection to the end post safety conductor and the lower conductor 14.
  • the induction coil 16 is connected to a detection unit 17 via a coupling block 18.
  • the induction coil 16 has a core which extends in annular manner about conductor 14 and is provided with a number of windings.
  • a second induction coil 19 is arranged which is fed by a voltage via coupling block 18.
  • This induction coil also consists of a core provided with a number of windings, this such that when an alternating voltage or a pulsating direct voltage is applied a magnetic field is generated in induction coil 18 which excites a voltage in the electric circuit 13.
  • a current will flow in the circuit formed by the lower conductor 14, the capacitor 15, the non-broken contacts 12 and subsequently to the conductor 13.
  • This current is detected in the induction coil 16 which generates a determined frequency via the coupling block 18 to the detection unit.
  • the detection block 17 is connected to the control circuit for the drive motor 8.
  • the above stated device operates as follows. In normal operation the electric circuit 13, 14 is closed because the break contacts 12 are all closed. When the motor 8 is energized the gate can therefore be closed and the conductor 14 will move freely along the induction coils 16, 19. As soon as an object or person is touched at the end post one of the break contacts 12 is opened and the electric circuit 13, 14 is broken. Current will no longer flow and the induction coil 16 no longer detects any frequency in the circuit, whereby a frequency change is transferred to the detection unit 17. This immediately renders the motor 8 inoperative via the associated control circuit.
  • the capacitor 15 will then change the RC-value of the electric circuit due to the end strip break contacts 12 being rendered inoperative.
  • the induction coil 16 detects a frequency change, which is compared at the detection unit 17 to a window value, whereby at a higher maximum limit value or a lower minimum limit value the motor 8 is rendered inoperative. Because the coil 16 preferably has more windings than coil 19, the frequency will be taken to a higher level so that the window values can be increased. Accuracy in detecting disturbances is herewith improved. Radio disturbances resulting from signals emitted by the electric circuit and signals received thereby are also eliminated. In this way the system is also protected within itself.
  • Fig. 3 shows a variant of the embodiment in fig. 2, with the difference that the second induction coil 19 is replaced by a voltage source 20 which is arranged on the movable body or fence.
  • This voltage source is arranged such that an alternating voltage of determined frequency is applied in the electric circuit 12, 13 and 14, which can be detected by the induction coil 16.
  • Fig. 4 shows another embodiment, wherein the moving body is formed by a roll-down door consisting of a number of mutually pivotable slats 21 whereof the head ends are received in a guiding 22.
  • a roll-down door consisting of a number of mutually pivotable slats 21 whereof the head ends are received in a guiding 22.
  • guide rollers or drive rollers 24 Arranged at the top of the passage opening 23 are guide rollers or drive rollers 24, wherein the guiding 22 continues further in horizontal direction.
  • the slats 21 can therefore run through a curved path and, depending on the drive direction of the rollers 24, can be moved in upward or downward direction according to arrow P2.
  • the moving body can also be provided here with a bottom strip 11' provided with break contacts 12' forming part of an electric circuit 13, 14.
  • the conductor 13 can herein be adhered fixedly to the slats 21 so that it can move along hingeably with these slats 21, while the other conductor 14 extends freely along the head end of slats 21.
  • This conductor has to be provided with a guide wheel similar to wheel 24.
  • the conductor 14 is here also carried along two induction coils 16, 19 which are connected to a detection unit 17 via a coupling block 18.
  • Detection unit 17 controls the drive motor 8' in the extension of the rotational shaft for the guide drive wheels 24.
  • the invention is not limited to the above described embodiments.
  • the annular coil(s) can for instance be replaced by any other suitable form at the conductor 14.
  • the capacitor 15 can be replaced by any other suitable resistance increasing member, such as resistor, diode or coil suitable for altering the frequency in the electric circuit.

Landscapes

  • Power-Operated Mechanisms For Wings (AREA)
EP19900203194 1989-12-01 1990-12-03 Dispositif de fermeture protégé Expired - Lifetime EP0431705B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902976A NL8902976A (nl) 1989-12-01 1989-12-01 Beveiligde afsluitinrichting.
NL8902976 1989-12-01

Publications (2)

Publication Number Publication Date
EP0431705A1 true EP0431705A1 (fr) 1991-06-12
EP0431705B1 EP0431705B1 (fr) 1994-12-07

Family

ID=19855734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900203194 Expired - Lifetime EP0431705B1 (fr) 1989-12-01 1990-12-03 Dispositif de fermeture protégé

Country Status (5)

Country Link
EP (1) EP0431705B1 (fr)
DE (1) DE69014838T2 (fr)
DK (1) DK0431705T3 (fr)
ES (1) ES2064606T3 (fr)
NL (1) NL8902976A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9401929A (nl) * 1994-11-18 1996-07-01 Nedap Nv Betrouwbare afknelbeveiliging.
EP0791716A1 (fr) * 1996-02-23 1997-08-27 Wampfler Aktiengesellschaft Dispositif de sécurité du bord antérieur de portes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008597A1 (de) * 1980-03-06 1981-09-10 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Sicherheitsschaltung fuer einen ueber ein zugmittelgetriebe bewegten tuerfluegel
WO1986005836A1 (fr) * 1985-04-02 1986-10-09 Joensson Bert Ove Agencement de securite dans un dispositif indiquant une pression ou une force
EP0316691A1 (fr) * 1987-11-16 1989-05-24 Thyssen Industrie Ag Dispositif de contrôle de l'état fermé d'un organe de fermeture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008597A1 (de) * 1980-03-06 1981-09-10 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Sicherheitsschaltung fuer einen ueber ein zugmittelgetriebe bewegten tuerfluegel
WO1986005836A1 (fr) * 1985-04-02 1986-10-09 Joensson Bert Ove Agencement de securite dans un dispositif indiquant une pression ou une force
EP0316691A1 (fr) * 1987-11-16 1989-05-24 Thyssen Industrie Ag Dispositif de contrôle de l'état fermé d'un organe de fermeture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9401929A (nl) * 1994-11-18 1996-07-01 Nedap Nv Betrouwbare afknelbeveiliging.
EP0791716A1 (fr) * 1996-02-23 1997-08-27 Wampfler Aktiengesellschaft Dispositif de sécurité du bord antérieur de portes

Also Published As

Publication number Publication date
DK0431705T3 (da) 1995-05-08
EP0431705B1 (fr) 1994-12-07
DE69014838T2 (de) 1995-05-04
NL8902976A (nl) 1991-07-01
DE69014838D1 (de) 1995-01-19
ES2064606T3 (es) 1995-02-01

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