US3277979A - Door locking mechanism - Google Patents

Door locking mechanism Download PDF

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Publication number
US3277979A
US3277979A US353517A US35351764A US3277979A US 3277979 A US3277979 A US 3277979A US 353517 A US353517 A US 353517A US 35351764 A US35351764 A US 35351764A US 3277979 A US3277979 A US 3277979A
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United States
Prior art keywords
bolt
locking
door
housing
lock
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
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US353517A
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English (en)
Inventor
Stutz Karl
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Individual
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Individual
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Filing date
Publication date
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Publication of US3277979A publication Critical patent/US3277979A/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
    • B66B13/14—Control systems or devices
    • B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position

Definitions

  • the avoidance of the danger of accidents in elevators requires a reliable securing of the access to the shaft, namely in such manner that a shaft door can be opened only when the elevator cabin is behind it and the elevator cabin can be set in motion only when the door is closed and locked.
  • These requirements are usually satisfied by the installation of door switches operated by the door in their closed position and door locking mechanisms which may be unlocked by a movable sliding cam secured on the elevator cabin.
  • the door switch interrupts the control circuit of the elevator, as long as the door is open.
  • the door locking mechanism has a locking switch which controls the position of the bolt and interrupts a lock mechanism checking circuit of the elevator controls as long as the door is not locked.
  • the door locking mechanism should be of such construction that all movement of the elevator cabin is positively prevented even if the door switch is bridged over and the door is open. This problem is best solved by preventing the bolt from assuming the locking position when the door is open.
  • the lock mechanism check circult is closed only when the door is closed and locked.
  • the operating piece for release of the lock catch is situated outside the lock bolt and does not come into contact therewith.
  • the lock catch itself possesses an operating bolt which in the blocking condition extends beyond the housing of the door locking mechanism and upon closing of the door is pushed back by the door, so
  • a second group of door locking mechanisms the operating piece for the release of the lock catch is assembled with the locking bar.
  • the release of the lock catch is effected for example by rotation of the locking bar.
  • the rotation of the locking bar is effected due to the fact that a spiral groove provided on the periphery of its free end comes into engagement with a tooth protruding from the lock opening in the door leaf.
  • This construction requires high precision in production and in installation and is also very liable to failure.
  • Another door locking mechanism provides a pawl secured on the locking bar, which upon entry of the lock bolt into a corresponding counterpiece in the door leaf is operated and thus releases the lock catch.
  • This pawl involves the disadvantage that it can be operated very easily by unauthorized persons when the door is open.
  • the release of the lock catch is effected by a control bolt which is displaceably arranged in a longitudinal bore of the locking bar.
  • the control bolt is shifted in relation to the locking bar, as the latter is pushed forward into the locking opening of the door leaf, by a stop pin protruding in the lock opening, and in being shifted effects the release of the lock catch.
  • the present invention relates to a door locking mechanism, the lock catch of which is released in the manner last stated.
  • the lock catch consists of a catch pin engaging in the locking bolt perpendicularly thereof, which pin is pressed by means of a spring against a cam-shaped supporting surface on the control bolt.
  • the catch pin protrudes beyond the lock bolt and limits the locking movement of the locking bar by abutment on the housing part, if the door is not closed.
  • the control bolt is shifted by the stop pin inthe lock opening of the door leaf in relation to the lock bolt.
  • the surface of engagement is set back so that the catch pin enters the lock bolt completely under the action of its spring. Consequently, the locking bar can now completely carry out the locking movement.
  • the release does not take place positively. Jamming or sticking of the catch pin can hinder the correct working of the door locking mechanism, that is to say the lock catch can become efiiective when the door is closed.
  • not only the control bolt but also the passage opening for the locking bolt in the housing part is provided with a cam-shaped support surface for the catch pin.
  • the catch pin is no longer pressed by a spring against the cam-shaped support surface of the control bolt, but, provided that the position of the control bolt permits it, it is shifted by the camshaped support surface on thehousing part in the locking movement of the locking bolt.
  • the locking mechanism for elevator doors possesses a locking bolt slidably guided in a housing and articulately connected to a lever rotatably mounted on the housing.
  • the locking bolt is subject to the action of a spring which thrusts it out of the housing and a movable sliding cam on the elevator cabin which draws it into the housing against the action of said spring.
  • the bolt has a lock catch adapted to cause a shift in the relative position between the locking bolt and a control bolt arranged displaceably in a longitudinal bore thereof and possessing a groove-shaped recess.
  • the said catch positively interrupts the outward movement of the locking bolt before its locking position is reached, if the control bolt is not shifted in the locking bolt by a predetermined amount out of its initial position positively assumed in every unlocking movement by striking upon a stop secured on the housing.
  • On this locking bolt there is secured an elastic contact bridge which when the lock bolt is advanced into its locking position by cooperation with two contacts secured in insulated fashion on the housing closes a current circuit of the elevator controls and when the lock bolt is Withdrawn out of the locking position interrupts this current circuit.
  • the invention consists in that the end articulatedly connected with the lock bolt of the lever rotatably mounted on the housing is formed as a catch finger which in the outward movement of the lock bolt constantly and positively approaches this bolt, and when the control bolt is pushed by the predetermined amount out of the initial position, engages the recess of the control bolt, so that the lock bolt can move out into the locking position, but when the control bolt remains in the initial position, the finger comes to rest on the periphery of the control bolt against a stop surface and thus prematurely interrupts the locking movement.
  • FIGURE 1 shows the mechanism in the unlocked position with the door closed
  • FIGURE 2 shows the mechanism in the locked position with the door closed and
  • FIGURE 3 shows the mechanism in the blocking position when the door is opened.
  • 1 designates the housing of the door lock, which is secured on a door post 2.
  • 3 is a shaft door into which there is welded a bolt receiving means or lock stop 4 with a stop pin 4.1.
  • the door lock includes a shaft 5 rotatably mounted in the housing 1.
  • a lever 6 is secured inside the housing 1 on shaft 5 and on its outside end there is secured a roller lever (not shown) cooperating in known manner with a movable sliding cam on the cabin.
  • the lever 6 is formed as a bell-crank lever with the two lever arms 6.1, 6.2. Against one end of the lever arm 6.1 rests a compression spring 8 guided by means of a bolt 7 and engaging a housing projection 1.1. The end of the lever arm 6.2 is formed as a blocking finger 6.3. The lever arm 6.2 has a bore 6.4 in which there is secured a spindle 9. 11 designates the lock bolt of the door lock. This bolt is pivotally mounted on the spindle 9 and guided in the exit opening of the housing 1. The compression spring 8 tends to rotate the bell-crank lever 6 in such manner that the lock bolt 11 is thrust out of the housing 1. 12 and 13 designate two rubber stops secured on the housing 1 and limiting the movement of the lever arm 6.2.
  • the lock bolt 11 possesses a longitudinal bore 11.1 and two longitudinal slots 11.2, 11.3.
  • a control bolt 14 displaceable in relation to the lock bolt 11.
  • the control bolt 14 has a guide nose 14.1, which extends out beyond the lock bolt 11 through the longitudinal slot 11.2.
  • the guide nose 14.1 is adapted to move along a path which is limited at one end by a stop 12.1 formed by the securing of the rubber stop 12.
  • the control bolt 14 is further provided with a stop surface 14.2 and a grooveshaped recess 14.3. At one end of surface 14.2 there is provided a shoulder 14.4.
  • the control bolt 14 then remains blocked in the position assumed, while the lock bolt 11 is shifted still further.
  • the catch finger 6.3 now engages the recess 14.3 of the control bolt 14 whereupon the contact bridge 17 interconnects the contacts 18, 19.
  • the locking mechanism check circuit is closed, so that the elevator cabin can now travel away.
  • the locking movement of the lever arm 6.2 is limited by the rubber stop 12.
  • the door locking mechanism then is in the locking position as represented in FIGURE 2.
  • a device for locking doors including, in a unitary structure, a locking mechanism and a circuit maker responsive to said locking mechanism, the improvement in said device comprising,
  • control bolt slideably disposed within said hollow locking bolt and movable as a unit therewith, said control bolt, when said locking bolt is in said advanced position, being adapted to assume a forward position in the absence of said stop means and a blocked position in the presence thereof, said control bolt including (1) a recess, (2) a stop face spaced from said recess, (3) spring means urging said control bolt away from said pivotal means and (4) means restraining said control bolt within said locking bolt,
  • an electric contact including (h) a finger integral with said lever arm and adapted to swing toward said control bolt as said locking bolt and said control bolt are being advanced by said lever arm as a unit, said finger adapted to engage said recess when said control bolt is in said blocked position causing said arm to assume a position whereby said movable contact engages said stationary contact, and said finger adapted to engage said stop surface when said control bolt is in said forward position causing said arm to assume a position whereby said movable contact remains separated from said stationary contact to prevent the making of an electric circuit when said door is in said open position and said locking bolt is in said advanced position.
  • said stop means comprises a pin adapted to extend into said locking bolt when said locking bolt extends into said bolt receiving means causing said control bolt to abut thereagainst and assume its blocked position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Lock And Its Accessories (AREA)
  • Elevator Door Apparatuses (AREA)
US353517A 1963-03-25 1964-03-20 Door locking mechanism Expired - Lifetime US3277979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH377363A CH398925A (de) 1963-03-25 1963-03-25 Türverriegelung für Aufzugstüren

Publications (1)

Publication Number Publication Date
US3277979A true US3277979A (en) 1966-10-11

Family

ID=4263169

Family Applications (1)

Application Number Title Priority Date Filing Date
US353517A Expired - Lifetime US3277979A (en) 1963-03-25 1964-03-20 Door locking mechanism

Country Status (8)

Country Link
US (1) US3277979A (pt)
BR (1) BR6457444D0 (pt)
CH (1) CH398925A (pt)
DK (1) DK113874B (pt)
ES (1) ES297986A1 (pt)
FI (1) FI41446B (pt)
GB (1) GB1048830A (pt)
NL (1) NL148007B (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471856A (en) * 1982-08-13 1984-09-18 Magee John E Elevator door interlock
EP0558299A2 (en) * 1992-02-24 1993-09-01 Otis Elevator Company Elevator rotary door interlock
US5507365A (en) * 1993-02-15 1996-04-16 Prudhomme; Dominique Universal lock for a positive safety door, in particular a landing entrance for elevator apparatuses
US8424934B2 (en) 2010-01-27 2013-04-23 Tim Askins Electromechanical door locks for lifts
CN103434916A (zh) * 2013-08-20 2013-12-11 广州日滨科技发展有限公司 旁开门式电梯及其轿门锁

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT237239B (de) * 1963-04-08 1964-12-10 Inventio Ag Türverriegelung für Aufzugstüren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT237239B (de) * 1963-04-08 1964-12-10 Inventio Ag Türverriegelung für Aufzugstüren

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471856A (en) * 1982-08-13 1984-09-18 Magee John E Elevator door interlock
EP0558299A2 (en) * 1992-02-24 1993-09-01 Otis Elevator Company Elevator rotary door interlock
EP0558299A3 (en) * 1992-02-24 1993-09-29 Otis Elevator Company Elevator rotary door interlock
US5507365A (en) * 1993-02-15 1996-04-16 Prudhomme; Dominique Universal lock for a positive safety door, in particular a landing entrance for elevator apparatuses
US8424934B2 (en) 2010-01-27 2013-04-23 Tim Askins Electromechanical door locks for lifts
CN103434916A (zh) * 2013-08-20 2013-12-11 广州日滨科技发展有限公司 旁开门式电梯及其轿门锁

Also Published As

Publication number Publication date
DK113874B (da) 1969-05-05
NL148007B (nl) 1975-12-15
ES297986A1 (es) 1964-06-01
CH398925A (de) 1966-03-15
GB1048830A (en) 1966-11-23
FI41446B (pt) 1969-07-31
NL6402976A (pt) 1964-09-28
BR6457444D0 (pt) 1973-12-27

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