DE8417727U1 - Fire door or the like - Google Patents

Description

«A-'TENTA.NWAu.TE,! ..! .. ·· ··" *

. '° ^ Nv / · BODO THIELKING j, «=> ι_ ING OTTO ELBERTZHAGEN

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Applicant: Deutsche Metalltüren-Werke Aug. Schwarze

Aktiengesellschaft, Carl-Severing-Straße 192, 4800 Bielefeld 1

Fire door or the like

The invention relates to a fire door, gate or the like with an activatable under the influence of heat Lock to connect the door leaf to a fixed area.

Fire doors of this type are with the most diverse Locks became known. For example, there are locking mechanisms in the door or the frame built-in spring-loaded bolts are formed. The spring-loaded Bolts are held in their retracted locking position by materials that melt under the action of fire. A disadvantage of these known locking devices is the fact that on the one hand the temperature range in which they respond, is not very precise and that, on the other hand, they remain in the locking position after activation in the event of a fire.

Based on this prior art, the object of the invention is to provide a fire door of the type mentioned at the beginning To be designed in such a way that the locking mechanism responds safely in a particularly narrowly limited temperature range

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This object is achieved according to the invention in that the locking mechanism is formed by a bolt made of memory metal, which is attached to the door leaf or to the fixed area Hj and, under the influence of heat, dips into an opposite receiving opening in the opposite part. The | Fixed area can, for example, be a part of a building, ζ the floor, a fixed door leaf or a door frame

The use of the properties of the well-known memory metal for a locking device in fire doors or; Fire protection gates have the great advantage that the response accuracy is extremely precise. The sudden deformation, like it is important for the application according to the invention occurs

in a certain temperature range with an accuracy of +/- 5 Celsius. Because of this great accuracy, the use of memory metal is far superior to the use of bimetal strips for locking purposes. The response sensitivity of the memory metal, which is defined in narrow temperature ranges, means that, on the one hand, at lower temperatures, such as a selectable response temperature of 60 ° to 70 ° Celsius, no disruptive areas of the bar protrude, but that when the '. desired response temperature, the locking takes place very briefly, namely in seconds. The sudden deformation is particularly important because if this process took longer, the door leaf could in the meantime have shifted so far with respect to the door frame that the bolt could no longer get into its counterpart.

In a particularly expedient embodiment of the invention, the memory metal is programmable. This means it's on. any desired operating temperature can be adjusted and is configured so that dear deformation process is reversible, that is, after cooling, the door latch returns to its origi- nal I position and shape and thus unlocks the door. %

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...: .. '■ · ·· figure preferred embodiments of the Er - 3 - June 5, 1984 k ^; Drawing described in detail. It Embodiments of the invention are in the sub described. 1 - a partially cut dar will position of the edge area of a, finding based on the figure Fire door made of door leaf and demonstrate: Door frame and a lock; stands, i figure 2 - a longitudinal section through the in Figure 1 bolt shown in cross section; figure along plane II-II in Fig. 1, 3 - a longitudinal section analogous to FIG. 2 by a second embodiment, 4 - another version accordingly figure Figure 1, in which the latch in the Door frame attached and the locking recess is provided in the door leaf, 5 - a longitudinal section along plane V-V in Figure 4. 13 419 a Preferred claims Below

The door frame is denoted by 1 in all embodiments. The door leaf also has the reference number 5. The recess in the door frame is denoted by 2, different embodiments being distinguished from one another by prime characters. The recess in the door leaf has the; Reference numeral 4. The different embodiments are distinguished from one another by prime characters. The latch made of memory metal is denoted by 3, the different embodiments also being distinguished from one another by prime characters. The latch, made of memory metal, is attached to the part carrying it with the help of two! Screws 6 screwed on. In the embodiment according to _; Figures 1 and 2, the bolt 3 arches into the corresponding recess 2 in the frame 1. In the embodiment according to; Figure 3, a pin 8 is used to arch the bolt 3 '

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13 419 a

June 5, 19 84 k

to be deformed in such a way that the curved area enters the recess 2.

In the embodiment according to FIGS. 4 and 5, the bolt 3 ¹ 'is screwed tight in the recess 2' with the aid of the screws 6. The bolt 3 ¹¹ assumes the dash-dotted position in the activated state and protrudes into the recess 4 '.

The joint between door leaf 5 and door frame 1 is denoted by 7.

Claims (5)

1. Fire door, gate or the like with a locking mechanism that can be activated under the influence of heat for connecting the door leaf to a fixed area, characterized in that the locking mechanism is formed by a memory metal bolt (3; J ¹ ; 3 ") which is attached to the door leaf (5) or the fixed area and is immersed under the influence of heat in an opposite receiving opening (2; 2 "; 4 ¹ ) of the opposite part. 2. Fire door according to claim 1, characterized in that that the bar (3; 3 '; 3 ") made of memory metal for reshaping after the cooling following the heating is trained in its starting position. 3. Fire door according to claim 1 or 2, characterized in that the bolt (3; 3 '; 3 ") is attached with one end to the door leaf (5) or to the fixed area and that its free area for pivoting into the opposite receiving opening ( 4; 2; 4 ¹ ) is formed. 4. Fire door according to one or more of claims 1 to 3, characterized in that the fixed Area is a door frame (1). 5. Fire door according to one or more of claims 1 to 4, characterized in that the bolt (3; 3 '; 3 ") is designed as a flat band which, in the non-activated state, is at least essentially parallel to the Joint (7) between door leaf (5) and door frame (1) extends.