FI60759C - ANORDNING VID ROEKEVAKUERINGSLUCKA - Google Patents

Description

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jSK M «" »UTLAGGNINGSSKKIFT oU / öy C (45) Patent granted 10 03 1932 Patent oeddelat '(51) Kv.ik.3 / i« .a.3 E 05 P 1/12 FINLAND — Fl N LAND (21) P »t * nttlh» k # mu $ - P »t * ntin * eiinlng 780338 (22) H» k * mlspllvl - Araöknlngtdag 02.02.78 '' (23) Alkupllvl — Gltelfhetsdag 02.02.78 (41) Tullut julklMkil - Bllvlt effentllj 09.08.78

National Board of Patents and Registration M

. ,. . _. . (44) Nlhtivlkslpsnon | » date of publication. - oc ^ registerstyreleen AntBktn utltfd och utl. * Krlft * n publkvnd 30.11.8l (32) (33) (31) Pyydetty etuoikeus — Begird prloritet 08. 02.77

Sweden-Sweden (SE) 7701351-i * (71) Höganäs AB, Fack, 26301 Höganäs 1, Sweden-Sweden (SE) (72) Sven Ilögedal, Sollebrunn, Sweden-Sweden (SE) (7 * 0 Berggren Oy AI » (5 * 0 Arrangement in the smoke extraction hatch - Anordning vid rökevakueringslucka

The present invention relates to an arrangement in a smoke extraction hatch comprising a frame consisting of two longitudinal sides and two transverse sides surrounding an outlet opening with a transverse beam arranged approximately in its center, about which at least one flap is pivotable around its other longitudinal side corners and hinges the flap is subjected to a load which tends to bring it into the open position but which is held in the closed position by the triggerable flap of the flap.

Various torsion spring mechanisms have been proposed to achieve the desired load. Known mechanisms, on the other hand, are difficult to install and there are certain risks involved in transporting the hatches from the manufacturing site to the building where the hatches are installed. On the other hand, the torsion spring is mounted outside the door frame, which sometimes leads to damage to the spring and its fastening members. The mechanism has applied a skewed load to the hinges, especially in the wide flaps, which makes it difficult to open the door.

60759

The adapter blade according to the invention is characterized in that the beam is formed of a disc-shaped plate-shaped member, that at least one additional hinge is adapted to connect a flap to a frame having a leaf attached perpendicular to said longitudinal side and pivotable to the flap. around the parallel pin, and that the load is generated by a U-shaped torsion spring known per se, one end of which is connected to said leaf while its other end is connected to a beam, outside the hinge axis,

The leaf of the additional hinge is preferably gold-shaped and comprises an arm which, in the closed position of the flap, extends in a substantially horizontal direction from the hinge pin a distance at least equal to the dimension between said pin and the upper edge of the nearest longitudinal side of the frame.

An embodiment of the invention will be described below with reference to an exemplary smoke extraction hatch provided with two pivoting flaps.

Figure 1 shows a partially cut-away end view of the hatch.

Figure 2 shows the hatch seen from another long side, with part of the frame cut open.

Figure 3 shows the torsion spring in two different projections.

Figure 4 shows a perspective view of the hatch with the flaps raised.

Figure 5 shows on an enlarged scale the left part of Figure 1.

The hatch shown in Figures 1 and 2 is fitted in connection with an opening 10 in the roof 11 surrounded by a frame. The frame includes two ends 12 and two long sides 13. It, together with a flap 14 pivotable with respect to both long sides, forms a ridge-shaped structure which closes the opening. The flap is held in the closed position by a fitting 15 of any known type, which includes a heat-meltable part and / or which fitting can be manually triggered. Each flap 14 is provided with hinges 16 at the corners of the long sides of the frame. The hinges consist of leaves parallel to the ends of the frame, located on their outer side and connected to them by pins 17 whose axis is located inside the long side of the frame.

When the flap is opened, its lower edge portion moves down beyond the long side of the frame, as shown in Figure 4.

To ensure automatic opening in the event of a fire hazard, the flaps must be loaded or prestressed. This is achieved here by means of a torsion mechanism, the main structural part of which is a torsion spring 18 bent into a U-shape.

The end portions 19, 20 of approximately equal lengths of springs are bent at right angles to the longitudinal axis of the arm in question and further so that both end portions 19, 20 form an approximately right angle with each other in the unloaded state of the spring.

Fig. 3 shows two projections of a torsion spring, the end part 19 being shown in solid lines in the unloaded state of the spring and in broken lines when it is loaded, i.e. when the flap has been moved to the closed position.

Each flap is provided with a third hinge comprising a leaf 21 attached to the flap, which can pivot about a pin 22 attached to a beam 23 directed across the opening 10, approximately from the center of the long sides of the frame.

To reduce the outflow resistance, the beam 23 consists of a disc-shaped plate-like member. The pivot axes of the pins 22 and 17 are on the same line.

The tubular sleeve 24 is attached to the leaf 21 and likewise the tubular sleeve 25 to the beam 23. The sleeve 24 is adapted to receive the end portion 19 of the torsion spring 18 and the end portion 20 of the sleeve 25. The installation takes place in the raised position, as shown in Figure 4. can be easily inserted into the sleeves 24, 25 and the main part of the spring is located parallel to the long side of the frame.

When the flap is then lowered, in the case shown both flaps, the mechanism is tightened, after which the flaps are locked

Claims (1)

An arrangement in a smoke extraction hatch comprising a frame comprising two longitudinal sides (13) and two transverse sides (12) surrounding an outflow opening with a transverse beam (23) arranged approximately in its center, with respect to which at least one flap (14) is pivotable to the corners of its other longitudinal side around the fitted hinges (16, 17) and which flap is subjected to a load which tends to bring it into the open position but which the flap (15) of the flap is held in a closed position, characterized in that the beam (23) is formed of a disc-shaped member that at least one additional hinge (21, 22) is adapted to connect the flap (14) to a frame having a leaf (21) arranged perpendicular to said longitudinal side (13) attached to the flap (14) and pivotable with a longitudinal side arranged inside the frame around the parallel pin (22), and that the load is formed by a U-shaped color known per se spring (18), the end of the second mandrel (19) of which is connected