FR2470235A1 - Fire door - has seals about door which swell when heated to form air-tight joint on veneered edges - Google Patents

Abstract

The fire-door, for containing hot gases, is mounted between door jambs and a cross-member (4) which are each covered by a strip of chip-board (5) and veneer (6). The jambs and cross-member may have a groove (2) containing a seal (7) which when heated swells out to form an air- tight joint. The door leaf (8) has veneer faces (13) which cover the fire-proof sides (12) and the chip-board core (11) and may carry in a central groove about its edges another expandable seal (14).

Description

 The present invention relates to a method of manufacturing a fire door and the doors thus obtained.

 The doors currently known are very heavy and difficult to operate by a young child; moreover, they are very expensive.

 The heaviness of these doors indirectly generates lock jams in the presence of a panic situation which prevents any operation.

 The door, object of the present, is designed to remain very functional in any circumstance and to be opened or closed even by a young child. It offers all the advantages of long-lasting fire doors; resistant to flame, heat and hot gases.

 The door which is the subject of the invention has a leaf produced according to the present process and which fits perfectly into houses or apartment buildings.

 The leaf is positioned on frames by hinges. A suitable mechanism, placed on the top of the leaf, hinge side, closes the door without human intervention. The core of the door is made of materials such as: flame resistant asbestos. An intumescent seal placed on the edges of the leaf or on the frames, makes the door very airtight to hot gas vapors.

 The accompanying drawings illustrate by way of nonlimiting example, with the description below, an embodiment of the device according to the present invention.

 Figure I shows in elevation a door with a leaf.

 FIG. 11 represents a vertical section along the axis AA shown in FIG.

 Figure III shows a horizontal section along the axis BB shown in Figure I.

The door, according to Figures I, II and III, includes frames 1 with single rebate. A brick rebate 2 is formed on the uprights and crosspiece assembled by straddling and wood screws, not shown in the figures. The uprights 3 and the cross-member 4, frames, are covered on three faces with a strip 5 of material such as pressed chips, by gluing,
On the strip 5 is glued a laminate 6 offering a good facing. The uprights 3 of the frames are sealed in the ground with a depth of forty five millimeters.

In the rebate 2 of the uprights 3 and the transverse 4 of the frames is housed an intumescent seal 7 fixed with glue or by any other suitable means.

 On a post 3 pivots a leaf 8 by means of four electric hinges 9.

 The leaf 8 has a frame 10 holding the core by embossing and gluing. The core is a panel 11 of agglomerated wood particles, about two centimeters thick.

 On each side of the panel 11, a plate 12 of asbestos-cement is glued, and the latter are also coated with a sheet 13 laminated by facing by gluing.

The asbestos-cement plates can be replaced by vermiculite panels glued and compressed or any other material of equivalent composition and technological result.

 The upper and lower transverse edge of the leaf 8 comprises an intumescent seal 14 positioned in the degreased groove in oblique or straight section, with transverse edge in straight section.

 The joint 14 of the upper edge of the leaf has the particularity of being slightly offset on the right opposite the joint 7 of the cross section 4 of the frame. This original positioning makes it possible to avoid blocking the operation of the door in the event that the seals 7 and 14 swell simultaneously.

 The leaf 8 closes with an anti-panic lock 15 with tilting bolts up and down and tilting lateral bolt.

 Figure IV shows the upper edge 16 of the degreased leaf in oblique section 17 forming the housing of the intumescent seal 14 hot glued.

 Figure V shows a variant design of the seals. The seal 14 positioned on the upper edge 16 of the leaf is placed in the middle of the seals 18 positioned in the frame, parallel to them.

 The process which is the subject of the invention can be applied very particularly for the entrance doors of apartments and more generally in public buildings and factories, boiler rooms and hotels.

Claims (6)

 1) Design of a fire door to stop the flames and evaporations of hot gases for a suitable time, characterized in that the uprights and the crosspiece, frames, are covered, on three sides, successively with a strip of chipboard and a laminate, and are provided with an intumescent seal, in that a leaf pivoting on an upright by hinges with the core covered on each side, with a plate of asbestos and a laminate sheet, and has an intumescent seal on its edges. 2) Design according to claim 1, characterized in that an intumescent seal is positioned on the uprights and the cross member of the frames, in a longitudinal groove.  3) Design according to claim 1, characterized in that an intumescent seal is positioned on the upper and lower transverse edge of the leaf in a median longitudinal groove. 4) Design according to claims 1 and 3, characterized in that the grooves, on the edges of the leaf, are degreased in straight or oblique section.  5) Design according to all of claims 1,2, 3 and 4, characterized in that the groove housing the joint, in the cross member of the frames, is peeled off on the left opposite the groove made on the edge upper leaf. 6) Design according to claim 1, characterized in that two grooves can be made on the cross member of the frames so as to be separated by the leaf seal.