Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B65/00—Locks or fastenings for special use
  • E05B65/10—Locks or fastenings for special use for panic or emergency doors
  • E05B65/1006—Locks or fastenings for special use for panic or emergency doors of the vertical rod type
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B63/00—Locks or fastenings with special structural characteristics
  • E05B63/18—Locks or fastenings with special structural characteristics with arrangements independent of the locking mechanism for retaining the bolt or latch in the retracted position
  • E05B63/20—Locks or fastenings with special structural characteristics with arrangements independent of the locking mechanism for retaining the bolt or latch in the retracted position released automatically when the wing is closed

Definitions

• the invention relates to an automatically latching locking device for locking a door, which locking device comprises a latch mounted in the body of the door and a pull bar connected to it.
• the invention thus relates for instance to a lock mechanism used in double doors for locking the half of the double door which is normally kept locked.
• a turnable latch and automatic locking has been used in the way that the latch turns horizontally supported by a cantilever shaft, whereby the strength of the product is critical. Additionally the product has a complicated pull rod system and is therefore difficult to install. None of the products mentioned above have been designed taking into consideration the possibility of using an electric locking system.
• the latch mechanism is connected to a sensing element or a detecting latch which automatically effects closing of the door and locking of the latch mechanism when the sensing element of the latch mechanism has come into contact with the door frame or the like.
• the pull rods are preferably connected to the latch mechanism so that the unlocking of the latch mechanisms is effected synchronously, for instance by pressing a push-button, but the locking of each latch mechanism is effected independently of the other.
• the pull rods or wire ropes function actively and pull the latch mechanism to an unlocked position.
• the latch mechanism has reached its unlocked position, i.e. when the locking latches have been retracted from the recesses in the door frames, the pull rods or wire ropes are released, i.e. permitted to move freely relative to the movement of the latch mechanism.
• the push-button is preferably provided with a return spring which, once the latch mechanism has been opened, returns the push-button and the pull rods or wire ropes to their initial positions, i.e. the rest positions.
• the pull rods or wire ropes which are free relative to the push-button and latch mechanisms, do not substantially take part in the locking process when the door is closed.
• the latch mechanisms disposed in the upper and/or lower part of the door lock automatically when the sensing element or detecting latch mechanisms release or turn the locking latches into a locked position. Consequently, the locking of the two latch mechanisms takes place indepen- dently of each other and can thus take place at different times in each of the latch mechanisms.
• the pulling members in the locking device mechanism according to the invention can be relatively thin compared with the pull rods of the prior art, because their main purpose is only to transmit the pulling movement from the opening means to the latch mechanism.
• the pulling member does not necessarily have to be rigid.
• a wire rope or other similar means can for instance be used to transmit the pulling movement.
• the movement of the pulling member is transmitted to the locking latch by means of a mechanism comprising a latch turnable on a shaft and disposed in a box-like body part, which latch preferably is a flat-shaped member with an asymmetric periphery, turnable around the shaft and provided with at least two radially outwardly projecting protrusions, which form a locking latch and a detecting latch.
• the locking latch In the locking position of the lock mechanism, the locking latch protrudes from the body of the door extending into an opening, recess, or the like, formed in the door frame, thereby locking the door.
• the detecting latch protrudes from the body of the door and hits the door frame when the door is being closed, thereby turning the latch so that the detecting latch is pushed downwards (in the upper part of the door) into the body of the door, and the locking latch is pushed upwards and out from the body of the door.
• the door can be provided with a door pump which automatically closes the door and starts the process of locking the door.
• a movable flat slide is additionally disposed in the latch mechanism, in which a blocking or locking piece in the locked position of the latch mechanism prevents the latch from turning and the locking latch from moving to its unlocked position.
• the slide is mounted in the body of the latch mechanism, movably and parallel with its base, enabling it to be moved along the base in the longitudinal direction of the sides. The slide can be moved between upper and lower extreme positions.
• the slide is preferably connected to the latch by means of a spring, which in the locked position strives to keep the slide in its upper extreme position.
• the slide is additionally connected to the pull rod or wire rope.
• the end of the pull rod, in which there is a stop, is then preferably arranged to go through an opening in the lower edge of the slide so that the pulling movement of the pull rod is transmitted to the slide, which pulls the slide in the direction of the pull rod. In the rest position of the pull rod, the movement of the slide is not transmitted to the pull rod.
• the active pulling movement of the pull rod or wire rope is capable of pulling the slide to its lower extreme position, thereby moving the blocking or locking piece to a lower position and releasing the latch, which by the action of the spring strives to move the locking latch to its unlocked position.
• the pulling movement of the pull rod or wire rope i.e. the pressing of the push-button, is stopped.
• a spring is preferably disposed in the push ⁇ button, which automatically returns the push-button, and with it, the pull rods or wire ropes to the rest position when the pressing has stopped.
• the pull rod or wire rope In the rest position of the push-button, the pull rod or wire rope is not operatively connected to the slide, whereby for instance the closing of the door, the movement of the latch and the movement of the slide to its upper extreme position does not have any effect on the pull rod or wire rope.
• the arrangement according to the invention is simple and can easily be carried out.
• the latch mechanism according to the invention e.g. the following advantages compared with the prior art are achieved: strength, simple construction, automatic locking, easy installation, easy and fast unlocking for instance by a push-button and possibility to use electric control, for instance by means of solenoids.
• FIG. 1 shows schematically partly in section a portion of the door frame and the body of the door in which an automatically latching locking device according to the invention is mounted
• FIG. 2 shows the automatic locking device of FIG. 1 in its locking position
• FIG. 3 shows schematically the automatic locking device in its locked position
• FIG. 4 shows the automatic locking device of FIG. 3 in the unlocked position
• FIG. 1 shows a sectional view of the upper portion of the body 11 of a door and the door frame 10 above it.
• a latch 13 turnable on a pin 7 is mounted in the body of the door, parts of which latch, namely, a detecting latch 1 and a locking latch 2 protrude upwardly from the body of the door.
• a flat slide 4, to which a cube-like blocking piece 3 is attached, is mounted under the latch.
• FIGS. 3 and 4 it can be seen that the lower part of the slide 4 is connected to the latch 13 by means of a spring 6. Additionally the slide 4 is connected to the pull bar 8 of the opening push-button.
• a counter plate 9 is mounted on the lower surface of the door frame 10.
• a hole is formed in the door frame and the counter plate.
• the detecting latch 1 strikes the door frame and turns the locking latch 2 into the hole in the counter plate 9 and the door frame 10.
• FIG. 2 shows the latch according to FIG. 1 when the latch is in its locking position, with the locking latch 2 wholly turned into the hole in the counter plate 9 and the door frame 10.
• the cube-like blocking piece 3, which is attached to the flat slide 4 sliding beneath the latch 13, is now against the locking surface 12 at the lower edge of the latch and the latch is blocked.
• FIG: 3 shows the automatic locking device according to the invention without the cover in its locked position, the locking latch 2 being in an upright position.
• One end of the spring 6 is connected to the latch 13 and the other end to the lower end of the slide 4, the spring thereby keeping the blocking piece attached to the slide 4 in an upper position for preventing the blocking surface 12 of the latch from turning.
• FIG. 4 shows the automatic locking device according to the invention in its unlocked position, the detecting latch 1 being in an upright position.
• the spring 6 which is attached to the lower part of the slide 4 keeps the detecting latch 1 in the upright position and the latch ready to lock.
• the locking is performed according to FIG. 1: when the latch 13 turns around its pin 7, the front edge of detecting latch 1 strikes counter plate 9, and turns locking latch 2 into the hole in the counter plate 9 and door frame 10, whereafter the back edge of the locking latch 2 strikes the back edge of the counter plate 9 and the locking latch 2 turns completely into its locked position.

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• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Lock And Its Accessories (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8536942

Family Applications (1)

Country Status (4)

Families Citing this family (2)

Family Cites Families (5)

• 1993
  • 1993-05-31 FI FI930318U patent/FI1194U1/fi active
• 1994
  • 1994-05-31 EP EP94916250A patent/EP0725879A1/en not_active Withdrawn
  • 1994-05-31 AU AU67983/94A patent/AU6798394A/en not_active Abandoned
  • 1994-05-31 WO PCT/FI1994/000220 patent/WO1994028276A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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