DE3421695A1 - Fire door or the like - Google Patents

Abstract

In a fire door, fire gate or the like, the locking mechanism which can be actuated under the influence of heat and which is intended to prevent the door leaf from warping under the effect of heat is formed by a bolt made of memory metal.

Description

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PATENT LAWYERS

DIPL-ING. BODO THIELKING

DIPL.-ING. OTTO ELBERTZHAGEN ^u _rE ; _ex 93005 ^ aPWi ₁ α

34216 95 POST ^ CMtCKKOiV IO HAN 3O9S93-3O2

DAiUM June 5, 19 84 k

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 in their retracted locking position held by materials that melt when exposed to fire. These known locking devices have the disadvantage the fact that, on the one hand, the temperature range in which they respond is not very precise and, on the other hand, they are after remain in the locked position after activation in the event of 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

EPO COPY - y !!

13 419 3 ^{5 June 1984} "'

. This object is achieved according to the invention by '

; that the locking mechanism is made of memory metal j ^! Bolt is formed, which is attached to the door leaf or to the fixed area '{and under the influence of heat in an opposite _:

j The receiving opening of the opposite part is immersed. The ί ■ ι

i fixed area can, for example, be part of a building; , the floor, a fixed door leaf or a door frame j

ί. ί

be. ,

ί The use of the properties of the well-known memory metal ι

i for a locking device for fire doors or j fire protection doors have the great advantage that the response ■ j accuracy is extremely accurate. The sudden deformation, like.

; f

j it is important for the application according to the invention, occurs'

j in a certain temperature range with an accuracy

I of +/- 5 Celsius. Because of this great accuracy is _: the use of memory metal the use of [

I i

'Far superior to bimetal strips for locking purposes. The j

! ί

, response sensitivity defined in narrow temperature ranges - j ! The ability of the memory metal allows, on the one hand, for deeper: 'Temperatures, as for example a selectable response; I temperature from 60 to 70 Celsius no disturbing areas

I of the bolt protrude, but that nevertheless when reaching the j

i j

desired response temperature the locking very briefly: in a timely manner, namely in seconds. The sudden ver j

'Forming is particularly important because when this pre ί j corridor lasted longer, in the meantime the door leaf is facing; 'over the door frame could have moved so far that' the bolt no longer reached its counterpart.

i In a particularly expedient embodiment of the invention 'the memory metal is programmable. This means it's on ι any desired trigger temperature can be set and ι ί j

is designed so that deo: deformation process is reversible, ι ¹ ie after the door has cooled down, the bolt takes its original position and shape again and unlocks the door. j ■ - 3 - ...; J

copy Λ

13 419

June 5, 19 84 k

ment are in the

Preferred embodiments of the invention claims described.

Preferred embodiments of the invention are described in detail below with reference to the drawing. It demonstrate:

Figure 1 - a partially cut representation of the edge area of a ₍ fire door, which consists of a door leaf and j door frame as well as a lock,

Figure 2 - a longitudinal section through the bolt shown in Figure, 1 in cross section ' along plane H-II in Fig. 1, j

FIG. 3 - a longitudinal section analogous to FIG. 2 by a second embodiment,

Figure 4 - a further embodiment according to Figure 1, in which the bolt in the Door frame fastened and the latching recess is provided in the door leaf,

Figure 5 - a longitudinal section along plane V-V in Figure 4.

The door frame is denoted by 1 in all embodiments. The door leaf also has the reference number 5. With 2 the recess in the door frame is referred to, with different Embodiments are distinguished from each other by prime characters differentiate. The recess in the door leaf shows that

i reference numeral 4. The different embodiments are distinguished from each other by prime characters. The latch ■ made of memory metal is designated with 3, whereby the under-! Different embodiments can also be distinguished from one another by prime lines j. The ι bolt consisting 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 I recess 2 in the frame 1. In the embodiment according to Figure 3, a pin 8 is used to ^{arch the bolt 3 1} ; ' —_____. EPO ^- COPY

13 419

to deform in such a way that the bent area into the
Recess 2 arrives.

_{In the embodiment according to FIGS.} 4 and 5, the bolt 3, ^{11 is} fixed in the recess 2 'with the aid of the screws 6:

screws. The bolt 3 ¹¹ takes the activated state
dash-dotted position and protrudes into the recess 4 ¹ . ^1st '■

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

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Claims (5)

Claims; 1. Fire door, gate or the like with an under the influence of heat activatable locking mechanism for connecting the door leaf with a fixed area, characterized in that that the locking mechanism is formed by a bolt (3; 3 '; 3 ") made of memory metal, which is attached to the door leaf (5) or is attached to the fixed area and under the influence of heat in an opposite receiving opening (2; 2 '; 4') of the opposite part is immersed. 2. Fire door according to claim 1, ■ d - ad ¹ " ¹ U rch characterized in that the -'Riegel. (3;. '3'^K;.3") made of memory metal for forming after the subsequent heating Cooling is formed in its initial position. 3. Fire door according to claim 1 or 2, characterized in that the bolt (3; 3 ¹ ; 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 ') 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. EPO COPY "ί§