US3878919A - Elevator car door operating and locking device - Google Patents

Elevator car door operating and locking device Download PDF

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Publication number
US3878919A
US3878919A US370854A US37085473A US3878919A US 3878919 A US3878919 A US 3878919A US 370854 A US370854 A US 370854A US 37085473 A US37085473 A US 37085473A US 3878919 A US3878919 A US 3878919A
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US
United States
Prior art keywords
car door
linkage
locking position
linkage means
solenoid
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
US370854A
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English (en)
Inventor
Alan Dewhurst
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.)
Dewhurst and Partner PLC
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Dewhurst and Partner PLC
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 Dewhurst and Partner PLC filed Critical Dewhurst and Partner PLC
Application granted granted Critical
Publication of US3878919A publication Critical patent/US3878919A/en
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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
    • B66B13/06—Door or gate operation of sliding doors
    • B66B13/08—Door or gate operation of sliding doors guided for horizontal movement

Definitions

  • ABSTRACT Apparatus for operating a car door on an elevator includes a linkage mechanism which normally locks the car door when in the closed position.
  • bias means are provided to urge the linkage mechanism out of the locking position.
  • electromagnetic means including a fixed solenoid and moving armature being provided for energization to prevent such movement of the linkage mechanism under the action of the bias means during normal operation.
  • This invention relates to apparatus for operating a car door on an elevator car. and in particular to electri cally powered car door operator apparatus.
  • the invention provides car door operator apparatus on an elevator car comprising drive means. a linkage mechanism operable by said drive means to open and close the car door and arranged to adopt a locking position at least on closure of the car door so as to lock the car door in the closed position.
  • mechanical bias means arranged to urge said linkage mechanism out of said locking position.
  • electromagnetic means including a fixed solenoid and an armature mounted on said drive means for movement with said linkage mechanism and for magnetic coupling with said solenoid when said linkage mechanism is in the locking position so that movement of said armature is restrained on energization of said solenoid whereby to prevent movement of said linkage mechanism under the action of said bias means.
  • FIG. I is a front view illustrating schematically the general layout ofthe car door operator apparatus of the preferred embodiment.
  • FIG. 2 is a detailed front view ofthe drive system of the embodiment of FIG.
  • the drive means I comprises an electric motor 2 coupled by means of a belt drive (not shown) to free'turning wheel 3 which itself is coupled to drive the wheel 4. the whole assembly being mounted on a base 5 supported on the top of the lift car (not shown).
  • the linkage mechanism comprises first and second radius arms 6 and 7 mounted for rotation with the wheel 4. the outer end of the radius arm 6 being provided with a roller 8 received between the side walls of a vertical channel member 9 attached rigidly to the car door 10.
  • FIG. I The apparatus is shown in FIG. I with the car door 10 in the closed position. and to open the car door radius arms 6 and 7 are driven by the motor 2 in a counterclockwise direction (as seen in the drawings).
  • the roller 8 thus moves in a semi-circle indicated by II driving the channel member 9 and car door 10 to the right (as seen in the drawings) to open the car door.
  • the bias means comprises a lever I2 spring biased in a counterclockwise direction (as seen in the drawing) about the pivot point I3, the lever being arranged so that when the linkage mechanism moves into the doorclosed position as shown in the drawing. the radius arm 7 depresses the lever I2 against the action of the bias.
  • the lever 12 pushes the radius arm 7 upwards to turn the radius arms 6 and 7 in a counterclockwise direction to a nonhorizontal position.
  • FIG. 2 is a front view showing the drive system in greater detail with the apparatus in the door-open position.
  • the electromagnetic means comprises an armature plate 20 rigidly bolted to a spoke of the wheel 3. and a fixed solenoid 21 mounted so that when the wheel is in the position corresponding to the doorclosed position of the apparatus. the armature plate 20 is adjacent the pole face 22 of the core of the solenoid 21.
  • the lever I2 is formed by a bell crank lever having first and second arms 30 and 31 respectively.
  • the arm 30 being provided with a roller 32 for engagement by the radius arm 7 (as illustrated in FIG. I).
  • the bell crank lever is securely fastened to a shaft 13 which is journalled in support 33 mounted on the base 5 and provided with a robust spring (not shown) housed in the housing 34 and arranged to urge the bell crank lever in a counterclockwise direction (as seen in the drawing).
  • a stop post 35 projecting forwardly from the support 33 is engagable by detents 36 and 37 formed on the arms 30 and 31 of the bell crank lever to define the limits of angular movement of the bell crank lever. In normal operation.
  • the solenoid 2I is energized by the control system for the elevator apparatus when the doors are in the closed position. thereby preventing the drive means and linkage mechanism from moving out of the locking position under the action of the spring biased level 12.
  • the solenoid is deenergized. thereby allowing the spring biased lever 12 to push the radius arms 6 and 7 out of the horizontal locking position and allowing the doors to be opened by hand.
  • the solenoid is connected for energization by the power supply for the drive motor 2 so that the solenoid is de-energized whenever there is a failure in the power supply to the drive motor.
  • Elevator car door operating means comprising a. linkage means for opening and closing the car door. said linkage means being arranged to adopt a locking position at least on closure of the car door so as to lock the car door in the closed position;
  • drive means for operating said linkage means to open and close the car door.
  • said drive means including an electric drive motor. and power supply means for energizing said electric drive motor.
  • electromagnetic means for normally restraining movement of said linkage means from said locking position.
  • electromagnetic means for normally restraining movement of said linkage means from said locking position.
  • an armature mounted on said drive means for movement with said linkage means.
  • a stationary solenoid arranged opposite said armature when said linkage means is in the locking position. said solenoid being electrically connected with said power supply means. whereby upon the occurrence of a power failure with the elevator door closed. the solenoid is de-energized. thereby permitting said mechanical bias means to displace said linkage means out of the locking position.
  • said drive means comprises at least one wheel rotatable to operate said linkage mechanism and said armature comprises a plate otterro-magnetic material secured to said wheel.
  • said linkage mechanism comprises first and second radius arms mounted for rotation by said drive means and an elon gate guide member secured to said car door and wherein said mechanical bias means comprises a spring biased lever.
  • said outer end olsaid first radius arm being slidingly connected with said guide member and said spring biased lever being mounted for engagement by said second radius arm on movement of said linkage mechanism into said locking position for rotation against the action of the spring bias.

Landscapes

  • Elevator Door Apparatuses (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Lock And Its Accessories (AREA)
US370854A 1972-06-19 1973-06-18 Elevator car door operating and locking device Expired - Lifetime US3878919A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2861772A GB1426879A (en) 1972-06-19 1972-06-19 Lifts

Publications (1)

Publication Number Publication Date
US3878919A true US3878919A (en) 1975-04-22

Family

ID=10278434

Family Applications (1)

Application Number Title Priority Date Filing Date
US370854A Expired - Lifetime US3878919A (en) 1972-06-19 1973-06-18 Elevator car door operating and locking device

Country Status (4)

Country Link
US (1) US3878919A (es)
CA (1) CA979034A (es)
ES (1) ES416074A1 (es)
GB (1) GB1426879A (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436184A (en) 1982-05-05 1984-03-13 Westinghouse Electric Corp. Elevator system
US4512443A (en) * 1982-03-24 1985-04-23 Dewhurst & Partner P.L.C. Lift door control apparatus
US4529065A (en) * 1983-10-21 1985-07-16 Westinghouse Electric Corp. Elevator system
FR2625991A1 (fr) * 1988-01-14 1989-07-21 Soretex Dispositif d'entrainement d'une porte de cabine d'ascenseur
US20040206582A1 (en) * 2003-02-21 2004-10-21 Kenzo Tonoki Elevator door unit having mechanism to release lock unit manually in emergency

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1709301A (en) * 1929-04-16 Elevator-control apparatus
US2458402A (en) * 1944-02-29 1949-01-04 Maintenance Company Inc Automatic operator for elevator doors and hall doors
US2998245A (en) * 1959-04-20 1961-08-29 Dover Corp Power operator for elevator doors and the like
US3344556A (en) * 1965-11-18 1967-10-03 Edwards Power Door Co Inc Door operating device
US3406484A (en) * 1966-12-22 1968-10-22 Dover Corp Door operator mechanism
US3439454A (en) * 1966-04-21 1969-04-22 G D Peters & Co Eng Ltd Power-operated sliding door gear

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1709301A (en) * 1929-04-16 Elevator-control apparatus
US2458402A (en) * 1944-02-29 1949-01-04 Maintenance Company Inc Automatic operator for elevator doors and hall doors
US2998245A (en) * 1959-04-20 1961-08-29 Dover Corp Power operator for elevator doors and the like
US3344556A (en) * 1965-11-18 1967-10-03 Edwards Power Door Co Inc Door operating device
US3439454A (en) * 1966-04-21 1969-04-22 G D Peters & Co Eng Ltd Power-operated sliding door gear
US3406484A (en) * 1966-12-22 1968-10-22 Dover Corp Door operator mechanism

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512443A (en) * 1982-03-24 1985-04-23 Dewhurst & Partner P.L.C. Lift door control apparatus
US4436184A (en) 1982-05-05 1984-03-13 Westinghouse Electric Corp. Elevator system
US4529065A (en) * 1983-10-21 1985-07-16 Westinghouse Electric Corp. Elevator system
FR2625991A1 (fr) * 1988-01-14 1989-07-21 Soretex Dispositif d'entrainement d'une porte de cabine d'ascenseur
US20040206582A1 (en) * 2003-02-21 2004-10-21 Kenzo Tonoki Elevator door unit having mechanism to release lock unit manually in emergency
US7243760B2 (en) * 2003-02-21 2007-07-17 Toshiba Elevator Kabushiki Kaisha Elevator door unit having mechanism to release lock unit manually in emergency

Also Published As

Publication number Publication date
GB1426879A (en) 1976-03-03
ES416074A1 (es) 1976-05-16
CA979034A (en) 1975-12-02

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