Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
  • B66B13/02—Door or gate operation
  • B66B13/14—Control systems or devices
  • B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
  • B66B13/165—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position electrical
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B65/00—Locks or fastenings for special use

Definitions

• the object of this invention is a safety lock as defined in the preamble of claim 1 , a method for fitting the safety lock into the safety arrangement of an elevator as defined in the preamble of claim 12, and also an elevator as defined in the preamble of claim 15.
• Safety locks are used as a part of the safety arrangements of a building, e.g. in connection with the landing doors of an elevator.
• monitoring appliances with which the safety of the locking is verified, are needed in addition to the locking appliance in order to ensure safety.
• elevator regulators require that the locking system of the landing doors of an elevator must be monitored both by measuring the status of the locking and by measuring the position of the landing door to be locked.
• the position of the landing door is conventionally measured with a separate safety switch, which is fitted to open under forced control when the landing door opens.
• the aforementioned safety switch is installed separately to the landing door.
• Publication EP1473511 describes a measuring arrangement implemented with Hall sensors e.g. for monitoring the position of a landing door.
• the purpose of this invention is to disclose a new type of safety lock, in which both the monitoring of the locking and the measurement of the position of the landing door is done with a safety switch fitted inside the frame section of the safety lock.
• Another purpose of the invention is to present the fitting of a safety lock to the safety system of an elevator, more particularly in connection with the landing doors of the elevator.
• the safety lock according to the invention is characterized by what is disclosed in the characterization part of claim 1
• the method according to the invention for fitting the safety lock into the safety arrangement of an elevator is characterized by what is disclosed in the characterization part of claim 12
• the elevator according to the invention is characterized by what is disclosed in the characterization part of claim 15.
• Other embodiments of the invention are characterized by what is disclosed in the other claims.
• Some inventive embodiments are also discussed in the descriptive section of the present application.
• the inventive content of the application can also be defined differently than in the claims presented below.
• the inventive content may also consist of several separate inventions, especially if the invention is considered in the light of expressions or implicit sub-tasks or from the point of view of advantages or categories of advantages achieved. In this case, some of the attributes contained in the claims below may be superfluous from the point of view of separate inventive concepts.
• the safety lock comprises a frame section, and also a lock latch in connection with the frame section; additionally the safety lock comprises a catch lever guided via a guide interface, as well as a safety switch fitted inside the frame section.
• a beak part is made in connection with the guide groove of the lock latch, and the guide of the catch lever is fitted to move in the guide groove in relation to the lock latch in essentially the first position of the catch lever, and the guide of the catch lever is fitted to lock to the beak part in essentially the second position of the catch lever.
• a guide force by means of which the catch lever can be moved to a second position, can be exerted on the catch lever via the guide interface.
• the guide interface can comprise e.g.
• a safety switch in this context refers to a switch that opens under forced control, which can comprise one or more switch elements.
• the lock latch comprises a guide part, which guide part comprises a guide surface and also a guide groove.
• the safety switch comprises an operating lever of the safety switch, which operating lever of the safety switch is supported via a roller on the guide surface of the lock latch.
• the catch lever is fitted to turn around its hinge point and the catch lever comprises a guide, which is fitted into a guide groove.
• the catch lever comprises an arrester spring and also a closing magnet.
• the safety lock comprises a countermagnet of the closing magnet fitted into the door jamb, the polarity of which countermagnet is repellent to the closing magnet.
• the safety lock comprises a position switch (25), which is fitted to change its state on the basis of the position of the lock latch.
• the safety arrangement of the elevator is fitted to prevent, if necessary, movement of the elevator car by disconnecting the power supply to the elevator motor as well as by controlling the mechanical braking appliance of the elevator car on the basis of the position data of at least the first switch element of the safety switch; and the safety arrangement of the elevator is fitted to limit movement of the elevator car in the elevator shaft to outside the service spaces of the elevator shaft on the basis of the position data of at least the second switch element of the safety switch.
• the signal comprising the status data of the position switch of the lock is taken to the control of the door operator of the elevator car via the electrical interface of the frame section; and the door operator of the elevator car is fitted to be controlled on the basis of the signal comprising at least the aforementioned status data of the position switch of the lock.
• the elevator according to the invention comprises a safety lock fitted to a landing door of the elevator.
• the safety lock comprises: a frame section, and also a lock latch in connection with the frame section; a catch lever guided via a guide interface; and also a safety switch fitted inside the frame section.
• the electrical interface of the frame section of the lock can be designed such that the lock can be fitted into the electrical control systems and the safety systems of the building, such as into the safety system of the elevator system as well as into the control system of the door operator of the elevator.
• the safety lock comprises a closing spring instead of a conventional closing weight, the position of the lock does not affect the closing force, in which case the position of the lock can be freely selected.
• the safety lock comprises a measurement of the position of a door, such as the landing door of the elevator shaft, from the safety switch fitted inside the frame section, it is possible by means of the safety lock to form monitoring information about a fitter moving into the elevator shaft, and then movement of the elevator car in the elevator shaft can be limited to outside the service spaces of the elevator shaft on the basis of the monitoring information.
• Fig. 1 presents a safety lock according to the invention.
• Fig. 2 presents a safety lock according to the invention.
• Fig. 3 presents the guide part of the lock latch according to the invention.
• Fig. 4 presents a safety arrangement of an elevator according to the invention, in which is a safety lock according to the invention.
• Fig. 1 presents a safety lock 1 according to the invention in the closed position.
• Fig. 2 presents a safety lock according to the invention in the open position.
• Fig. 3 presents a guide part 9 of the lock latch according to the invention.
• the safety lock is here fitted to the landing door of the elevator.
• the safety lock 1 comprises a frame section 2 and also a lock latch 4 in connection with the frame section.
• the lock latch is fitted to turn around its hinge point 5.
• the lock latch comprises a stem part 6, a beak part 7 and also a separate guide part 9, which is fixed elsewhere on the lock latch.
• the guide part 9 is here a separate plastic part to the rest of the lock latch 4 to facilitate manufacture, but it can also be integrated into the rest of the lock latch.
• the guide part 9 comprises a guide surface 10 and also a guide groove 11.
• a beak part 20 is made in connection with the guide groove 11.
• the safety lock also comprises an operating lever 24, of the lock latch, which operating lever is fitted to transmit the force effect exerted on itself to turn the lock latch in relation to the hinge point 5.
• This force effect can, e.g. in an elevator system, be achieved with the door motor of the elevator, in which case the operating lever 24 of the lock latch is in connection elsewhere to the door operator of the elevator.
• the force effect can also be achieved e.g. manually with the emergency release appliance of the door.
• the safety lock also comprises a catch lever 3, by means of which the lock latch 4 can be latched into the open position when the door is open.
• the safety lock comprises a guide interface 17, 19, in which is a closing magnet 17 fixed to the catch lever. When the door is closed the pushing force from the counter magnet 19, which is fitted into the door jamb 18 at the position of the closing magnet, 19 is exerted on the closing magnet.
• An arrester spring 16 is fitted around the hinge point 14 of the catch lever, which arrester spring in turn exerts a latching force on the catch lever 3 that opposes the pushing force of the closing magnet.
• the catch lever When the pushing force of the closing magnet starts to be exerted on the catch lever 3, the catch lever turns to essentially its first position 21 , in which case the guide 15 of the catch lever is able to move in relation to the lock latch 4 in the guide groove 11. In the case the lock latch can turn freely and the lock can be opened and closed.
• the safety switch 8 comprises a first and a second switch element, that open under forced control, and in connection with these an operating lever 12 of the safety switch, which operating lever is supported via a roller 13 on the guide surface 10 of the lock latch.
• the operating lever 12 moves as the roller 13 moves along the guide surface when the lock latch is turned.
• the lock latch 4 is in the closed position the lock beak 7 is out, locking the door.
• the first and the second switch element of the safety switch 8 are closed.
• the operating lever 12 of the safety switch moves according to the movement of the guide surface 10, and the change in position of the operating lever forces the switch elements of the safety switch open. In this case the opened switch elements inform that the lock latch is in the open position.
• This information is transmitted to the safety arrangement of the elevator, in which the information is compared to at least the control command of the car door of the elevator, and if the information does not match, the safety arrangement deduces that the landing door has opened to the elevator shaft. In this case movement of the elevator car in the elevator shaft is limited.
• One of the two switch elements of the safety switch 8 is also in the safety circuit of the landing doors, so that opening of the switch element disconnects the safety circuit of the landing doors. In this case driving with the elevator is prevented by disconnecting the power supply to both the brake control circuit 29, 31 of the mechanical brake and to the elevator motor 27.
• the open switch elements of the safety switch 8 indicate the position of the landing door.
• the switch elements of the safety switch can change their state only after the landing door has closed, in which case locking of the guide latch is cancelled and the guide latch can be moved to the closed position.
• the safety lock 1 also comprises a closing spring 23, which is fitted between the frame section 2 and the lock latch 4.
• the closing spring exerts a force on the lock latch 4, which force endeavors to keep the lock latch in the closed position.
• the position switch 25 presented in Fig. 1 is disposed in the safety lock such that when the lock latch 4 moves to the open position, the guide part 9 presses against the position switch, in which case the position switch 25 changes its state on the basis of the position of the lock latch 4.
• Fig. 4 presents a safety arrangement of an elevator according to the invention.
• the elevator car 30 is moved in the elevator shaft 33 with an elevator motor 27 via elevator ropes.
• the power supply of the motor 27 is controlled with a frequency converter 28.
• safety locks according to the invention are fitted to the landing doors 26.
• the safety locks comprise safety switches 8 according to the invention, and the signal comprising the position data of the first switch element of each safety switch 8 is taken to the safety circuit 27 of the landing doors of the elevator via the electrical interface of the frame section 2.
• the safety circuit 27 in this embodiment of the invention comprises a safety circuit of first switch elements connected in series, and the first switch elements are connected to the safety circuit with conductors led through the electrical interface of the frame section of the safety lock.
• the signal comprising the position data of the second switch element of each safety switch 8 is taken by a conductor to the measuring circuit 28 of the landing doors of the elevator via the electrical interface of the frame section 2 of the safety lock 1.
• the measuring circuit comprises a resistor 29 connected in parallel with each second switch element.
• the parallel connections of the resistors and the second switch elements are connected in series and connected to each other with conductors, and the position of the landing doors is determined by measuring the impedance of the serial circuit.
• the signal comprising the status data of the position switch element 25 of each safety lock 1 is taken, via the electrical interface of the frame section 2 of the lock, by a signal conductor to the control 32 of the door operator of the elevator car, and the control of the door operator receives information about the position of the landing door from the status data of the position switch 25.
• the safety arrangement of the elevator is fitted to prevent, if necessary, movement of the elevator car 30 by disconnecting the power supply to the elevator motor 27 as well as by controlling the mechanical braking appliance of the elevator car, such as a machinery brake 29 or a wedge brake 31 of the elevator car, on the basis of the position data of at least the first switch element of the safety switch 8.
• the safety arrangement of the elevator is also fitted to limit movement of the elevator car in the elevator shaft 33 to outside the service spaces of the elevator shaft on the basis of the position data of at least the second switch element of the safety switch 8.

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• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Elevator Door Apparatuses (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38656799

Family Applications (1)

Country Status (4)

Cited By (4)

Citations (2)

Family Cites Families (2)

• 2007
  • 2007-10-19 FI FI20070787A patent/FI121668B/sv not_active IP Right Cessation
• 2008
  • 2008-10-15 EP EP08840493.4A patent/EP2197776B1/en not_active Not-in-force
  • 2008-10-15 DK DK08840493.4T patent/DK2197776T3/en active
  • 2008-10-15 WO PCT/FI2008/000112 patent/WO2009050328A1/en active Application Filing

Patent Citations (2)

Non-Patent Citations (1)

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