DE4033840A1 - Emergency exit door opening system - uses release spring acting on toggle lever mechanism for opening each locking element under electric control - Google Patents

Abstract

The emergency door opener has 2 mechanically or electrically coupled door locking elements released automatically in response to a fire alarm signal, the loss of the current supply or operation of a manual setting element under control of a spring bias and a respective toggle lever mechanism. The spring bias is normally equalised by a as electromagnet coupled to the electrical supply network. The spring system is incorporated in the door frame and is supplied via electric leads embedded in the wall, to prevent tempering. ADVANTAGE - Rapid opening of emergency exit door with manual override.

Description

Problem

1. Panic doors in hospitals, discotheques, meeting places and large buildings of any kind should normally be closed, but on the other hand, in the event of fire or panic, such doors should pass through without effort from the inside the threatened people must be overcome and from the outside by the approaching ones Rescue teams.

2. Fire departments and other emergency services require panic doors to be closed from the outside must be open when

• - the safety power grid fails (always an indication that a safety problem consists);
• - The fire alarm center of the building in question has an automatic fire alarm triggers;
• - a general fire alarm is triggered by hand at the location in question becomes.

3. Building operators require that external doors by means of a special button Hand in the "unlocked" position can be placed to certain people to allow access.

4. Building operators require that doors (such as shop doors) remain open for a longer period of time Time remains unlocked, whereby the control by hand or by time program a control system or another control system must be possible.

To clarify the entire problem, two more are to be found in the outer doors Locking systems explained:

Normal doors
Doors with a normal lock can be found in private homes, for example. If such a door has a handle on both sides (i.e. no knob), the door can be freely overcome if it is not locked.

A locked door, on the other hand, cannot be overcome. Should be such a door also act as a panic door, so it was a long-standing practice put the key in a red key box with a glass pane on the inside of the building to be arranged in the immediate vicinity of the door. However, this type of problem solving is no longer allowed because the keys were often stolen and people in the In the event of a disaster the escape route was cut off.

Panic lock
The industry then developed a panic lock in which both the handle and the change latch operated by the key actuate the locking bolt, which releases the lock latch in a mechanical sequence control. The handle on the inside is also designed as a bar across the entire width of the door, which enables even small children hanging on the bar to open the door in the event of a disaster. Such a door can only be opened from the outside using the associated key. Furthermore, a normal door opener fails, because every time the door falls into the lock, the locking bolt also automatically falls into the lock. (A normal door opener only affects the latch and fails when the door is closed, which can be desirable for normal doors.)

invention

The automatic door opener I invented is one in the fixed door frame flush-mounted wiring that is permanently installed against external influences Double door opener with two striking plates, separated by two but by the common Anchor of a quiescent current magnet coupled toggle lever systems from one to the The tension spring attacking the anchor is pulled into the open position in the event of a power failure. so that every door that is not locked, but also every door locked with a key Door, from inside by people who are in trouble, but also from outside by on Rescue teams arriving in buildings can be easily overcome. The Power is interrupted five times for a door declared as a panic door:

• - due to failure of the supply network;
• - by an interruption from the fire alarm control panel in the event of an alarm;
• - by interrupting the building management system;
• - by manual interruption using a button (briefly) or a switch (according to the time program);
• - through the built-in contact as long as the door is open.

The last-mentioned door contact prevents the sliding plates from moving into the closed position prematurely fall and a final closing of the door closing by a door closer to make impossible.

Another contact on the same door microswitch can be used as a potential-free contact be connected to the building management system and provides the message "Door xy is open ". Instead of the sliding plates assumed in the sketch, there would also be rotary pistons or other locking systems conceivable and instead of mechanical switches light barriers or proximity switches can also be used. The one I invented Double door closers can also be any normal door with a simple lock Upgrade the panic door, which prevents human tragedies in the event of a disaster comes because an outer door cannot be opened. Of course, such door systems must be checked regularly. This service could best be done by the chimney sweep take on as an additional task that comes regularly to all houses. The Door contact also causes a movement each time a door equipped in this way is opened.

Claims (2)

1. Double door with closed-circuit current actuation and signaling contact for installation in the door frame, characterized in that two mechanically or electrically coupled tumblers and locking devices that are locked with closed-circuit current, which may be controlled by toggle levers for the purpose of strengthening power, are operated together and when a fire alarm is signaled or in the event of a power failure , or when actuating an actuator by hand, or automatically by another control or a building management system, release both the lock latch and the striking plate by spring force, so that closed doors, but also doors locked with a key, are unlocked and both from the inside, as well as from outside, can be opened, the interrupted current indicates the unlocked state and a separate message, which is generated by a special, built in the door opener, signaling contact or a proximity switch or a light barrier, the state of open door, which means that even doors that were not expressly built as panic doors retain the function of a panic door and, in the event of a panic, enable people to go outside. 2. Double door opener according to claim 1, characterized, that this door opener also in the door frame of FH doors with several lock latches and / or striking plates can be installed and also effective in such cases Access from outside possible, where door locks were installed without an interchangeable latch; and that in particular by the arrangement of the door opener in the fixed frame a flush-mounted line can be used that offers good protection against willful or accidental destruction from outside.