A fireproof trim for a landing door for a lift

Abstract: The trim comprises a fireproof profiled element (11) of incombustible material, particularly steel, with an L-section having a first limb (11a) fixed to a jamb (1, 2) or transom (3) of the door frame and a second limb (11b) located adjacent the corresponding side or face (4-6) of the door opening. In front of the fireproof element (11) is a profiled cover element (14) of channel-section which has a first limb (14a) which bears against the jamb (1, 2) or transom (3) of the door frame and a second limb (14b) force-fitted between the second limb (11b) of the fireproof element (11) and the associated face (4-6) of the door opening. Fixing devices (15) clamp the second limbs (14b) of the cover elements (14) against the associated faces (4-6) of the door opening.

Description: The present invention relates to a lift landing door with a fireproof trim, having a frame with two side posts, or jambs, and an upper cross-member, or transom, fixed to corresponding sides or faces of a door landing opening. FR-A-2 211 340 discloses a lift landing door with a trim which, for each side post or jamb, includes a profiled element of incombustible material, particularly metal, of substantially L-shaped cross-section, with a first limb fixed to the side of the jamb facing the corresponding side face of the wall opening, and a second limb applied and fixed against the rear side of a wall portion in which there is defined the landing opening. The trim further comprises a channel-like cover element located in front of the said profiled element and having a first limb bearing against the side of said wall portion which faces the landing, and a second limb which is clamped to the first limb of said profiled element, and to the said side of the door frame jamb. Fixing means are provided to clamp the second limb of the cover element to the corresponding jamb of the door frame. The object of the invention is to provide a lift landing door with a fireproof trim which ensures effective fireproofing of the zone between the jambs and transom of the door frame and the sides or faces of the door opening, and which is also simple and economical to manufacture, easy to install and aesthetic in appearance. These and other objects are achieved in accordance with the invention by lift landing door with a fireproof a trim having the features defined in claim 1. Further characteristics and advantages of the invention will become apparent from the detailed description which follows, given purely by way of non-limitative example, with reference to the appended drawings, in which: Figure 1 is an elevational view of a landing door for a lift provided with fireproof trims according to the invention; Figure 2 is a section on an enlarged scale taken on the line indicated II-II of Figure 1, and Figure 3 is a perspective view of part of a fire-proof element included in the lift landing door of the invention. Figure 1 shows a landing door for a lift. This door includes a frame having two side posts, or jambs, 1 and 2 and an upper cross-member, or transom, 3 fixed to corresponding side and upper faces 4, 5 and 6 of a door opening. In Figure 1 the door is shown as it is seen from the associated landing L. In the embodiment illustrated by way of example, the door has two sliding panels 7 and 8. Between the jambs 1, 2 and the corresponding faces 4 and 5 of the door opening are respective fireproof trims. A similar trim is located between the transom 3 and the corresponding upper face 6 of the door opening. Only one of these fireproof trims will be described below with reference to Figure 2 and, in particular, the trim mounted between the jamb 1 and the associated face 4 of the door opening. The fireproof trims associated with the other jamb and the transom of the door frame have similar structures to that which will be described now. With reference to Figure 2, a fireproof trim 10 comprises a fireproof profiled element 11 of incombustible material, particularly steel, having a substantially L-shaped cross-section. This element 11 has a first limb 11a which is applied against and fixed to that face of the jamb 1 facing the landing. As is seen in Figure 3, the limb 11a of the fireproof element 11 conveniently has a plurality of longitudinally-elongate apertures 12 through which extend fixing screws 13 (Figure 2) which connect the fireproof element to the associated jamb 1 of the door frame. The fireproof profiled element 11 has a second limb 11b facing the lift shaft or well S and located adjacent the corresponding face 4 of the door opening (Figure 2). A profiled cover element indicated 14 has a substantially channel-section and is located in front of the fireproof element 11 with its channel facing the fireproof element. The cover element 14 has a first limb 14a which bears against that face of the jamb 1 facing the landing and a second limb 14b force-fitted between the limb 11b of the fireproof element 11 and the corresponding face 4 of the door opening. In the embodiment shown by way of example in Figure 2, the limb 14b of the cover element 14 has an extent such that its end projects beyond the limb 11b of the fireproof element 11 towards the lift shaft or well S. The jamb 1 of the door frame has an associated plurality of fixing bolts of which only one is visible in Figure 2 where it is generally indicated 15. These bolts are screwed in so that their ends bear on that portion of the limb 14b of the cover element 14 which projects beyond the limb 11b of the fireproof element 11 so as to clamp the cover element 14 against the face 4 of the door opening. In the event of fire, even if the door and the door frame deform as a result of their thermal expansion, the gaps or joints between the door frame and the associated faces 4-6 of the door opening remain closed since the fireproof elements 11 can slide relative to the frame as the apertures 12 engaged by the fixing screws 13 are elongate and, moreover, the limbs 14b of the cover element 14 act as slide surfaces. The fireproof trims are easy to install, installation being carried out mainly from the landing. They are particularly quick and simple to construct and assemble. When installed, the trims are also aesthetically pleasing. Naturally, the principle of the invention remaining the same, the forms of embodiment and details of construction may be varied widely with respect to that described and illustrated purely by way of non-limitative example, without thereby departing from the scope of the present invention as defined in the attached Claims.

Claims: A lift landing door with a fireproof trim having a frame with two jambs (1, 2) and a transom (3) which can be fixed to corresponding sides or faces (4-6) of a landing door opening of a lift well (s), and including, for each jamb (1, 2) and for the transom (3) of the door frame, a fireproof profiled element (11) of incombustible material, particularly metal, of substantially L-shaped cross-section with a first limb (11a) applied against and fixed to that face of the jamb (1, 2) or transom (3) facing the landing (L) and a second limb (11b) located adjacent the corresponding face (4-6) of the door opening, a profiled cover element (14) having a channel-section located in front of the fireproof profiled element (11) with its channel facing the fireproof element (11); the cover element (14) having a first limb (14a) bearing against that face of the door jamb (1, 2) or transom (3) facing the landing (L) and a second limb (14b) force-fitted between the second limb (11b) of the fireproof element (11) and the associated face (4-6) of the door opening, and fixing means (15) applied to the jamb (1, 2) or transom (3) of the door frame and clamping the second limb (14b) of the cover element (14) against the associated face (4-6) of the door opening. A lift landing door with a fireproof trim according to Claim 1, characterised in that the second limb (14b) of each cover element (14) has an extent such that its end projects beyond the second limb (11b) of the fireproof element (11) towards the lift space or well (S) and the fixing means comprise bolts (15) which are associated with the respective jamb (1, 2) or transom (3) of the door and whose ends bear against the portion of the second limb (14b) of the cover element (14) which projects beyond the second limb (11b) of the fireproof element (11), without passing through said second limb (14b) of the cover element (14). A lift landing door with a fireproof trim according to Claim 1 or Claim 2, characterised in that each fireproof element (11) has a plurality of longitudinally-elongate apertures (12) through which screw-fixing means (13) extend for connecting the fireproof element (11) to the associated jamb (1, 2) or transom (3) of the door frame.

Inventors: HAEGG JORI, LEHTONEN MIKA, NOVELLATI LUCA, PICCIN PIERPAOLO, PUGLIESE GIUSEPPE, RIPAMONTI RODOLFO, HAEGG, JORI, LEHTONEN, MIKA, NOVELLATI, LUCA, PICCIN, PIERPAOLO, PUGLIESE, GIUSEPPE, RIPAMONTI, RODOLFO, Hägg, Jori
Applicants: KONE CORP, KONE CORPORATION
Application year: 1997
Main classification: B66B13
IPC codes: B66B13, E06B1