AN ARRANGEMENT IN DOORS

Abstract: An arrangement in primarily doors of e.g. the kind comprising one door leaf (1) which is sufficiently flexible to allow the door to be opened and closed by the door leaf (1) being wound on and off a roller, respectively. An insert piece (2) is set into the door leaf (1), the material of said insert piece having properties which differ from those of the rest of the door leaf. The insert piece (2) is set into the door leaf (1) by means of a device which is easily openable and re-closable.

Description: The subject invention concerns an arrangement in doors of the kind comprising at least one door leaf of a first material, which door leaf is provided with an insert of a second material having properties differing from those of the first material. Both the first and the second materials are sufficiently flexible to allow the door to be closed by the door leaf being respectively wound-on and wound-off. In doors of this kind it is often desirable that the insert of the second material, which is attached to the first material, is in the form of a window through which it is possible to ascertain the presence on the other side of the door of objects, such as a vehicle, or of a person. Such transparent materials are, however, less durable when exposed to mechanical wear than is the material making up the rest of the door leaf. The lesser durability of such transparent materials is a consequence of the inherent tendency of such materials to crack when exposed to temperature variations. Furthermore, after a period of service the transparent material generally is scratched to such a degree that its see-through properties are almost entirely lost and consequently the transparent window material needs to be replaced. However, to replace the transparent material requires considerable work as the seam must be ripped up and a new piece of material be sewn on. As a rule, this operation requires that the entire door leaf be dismounted. In some cases it may also be advantageous to replace one window possessing certain properties by another window having different properties. For instance, it may be desirable to install windows of tight transparent materials during the winter season while in the summer the use of a transparent material with vent holes therein may be more desirable. The subject invention which concerns an arrangement in doors of e.g. the kind defined in the aforegoing provides a possibility of exchanging one section of the material of the door leaf for another, thus eliminating the disadvantages outlined in the aforegoing. This is achieved in acordance with the invention by an arrangement as set forth in claim 1. An arrangement in accordance with the preamble of claim 1 is disclosed in US-A-4 282 920, which relates to a rolling grille for shopping malls and the like. A prior art structure disclosed in Fig. 2 of said document comprises transparent plastic slats secured to links interconnecting rods of the grille. The plastic slats are secured by rivets or the like to flanges forming part of said links and are not intended to be easily detached from and easily re-attached to the grille, which instead should be as tamper-proof as possible. Further characteristics of the invention will appear from the dependent claims. The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein Figs. 1, 2a and 2b illustrate two different embodiments of possible means of attachment in accordance with the invention, and Figs. 3 - 6 illustrate different embodiments of varying the insert piece in accordance with the invention. Fig. 1 illustrates the joint or seam area bridging the door leaf 1 and the insert piece 2. The joint or seam is a pin seam comprising rows of loops 3 which are secured to the insert piece or window 2 and loops 4 which are secured to the door leaf 1. The loops 3 and 4 are interdigited and interconnected by means of a pintle wire 5. A covering flap 6 or similar fabric piece covers the seam, said covering flap 6 being secured to the window 2 as well as to the door leaf by means of velcro fasteners 7, 8, respectively. Fig. 2a shows the door leaf 1 together with the intermediate window 2 which in this case, like the embodiment illustrated in Fig. 1, is made from a transparent material. Also in this case the door leaf 1 is secured to the window 2 with the aid of a pin seam 3, 4 and a pintle wire 5. Fig. 2b illustrates the manner in which the entire window is covered during the winter season in order to prevent heat losses through the window 2. The latter could be provided with apertures or vent holes for purposes of ventilation during the summer season. In the winter, the window is covered by a covering fabric 9 or the like, which is attached to the door leaf on either side of the window 2 with the aid of velcro fasteners 10, 11, respectively. Fig. 3 illustrates a door 12 wherein the window section 13 extends transversely across the entire door leaf. In accordance with the variety shown in Fig. 4 the window 14 extends vertically along the centre of the door leaf, the latter in this case comprising two sections 15 and 16, one on either side of the window section 14. In accordance with the embodiment illustrated in Fig. 5 the door leaf comprises one upper section 17 and one bottom section 18 and the window section is divided into two parts 19 and 20 which are delimited by cross bars 21, 22, and 23. The bars 21, 22, 23 preferably are made from the same material as that of the door leaf sections 17, 18 although this is not absolutely necessary. Fig. 6, finally, shows a door leaf 24 which frames the window section 25 entirely. The invention is by no means limited to the embodiments described and illustrated in the drawings. For instance, the insert piece could be made from other kinds of material than transparent ones, such as a fabric having vent holes made therein to allow ventilation. The invention is described in the aforegoing when applied in a roll-up door leaf but it goes without saying that it could be used in a number of other flexible door leaves and also in structures of other kinds where problems of the nature outlined herein are encountered.

Claims: An arrangement in doors comprising at least one door leaf (1) of a first material, which door leaf is provided with an insert (2) of a second material having properties differing from those of the first material, said second material being replaceable and attached to the first material by means of a device which may be detached from and re-attached to the first material, characterized therein that said first and second materials being sufficiently flexible to allow opening and closing for the door by winding the door leaf respectively on and off a roller, in that said second material (2) is attached to the first material (1) in that at least one row of loops (3,4) is secured to each one of said first and second materials, and in that said loops are interdigited and interlocked by means of a common pintle wire (5) inserted through said loops. An arrangement as claimed in claim 1, characterized therein that the loop seam (3, 4, 5) is covered on one or both sides of the door leaf (1) with a strip of material (6) which is secured thereto by means of velcro fasteners (7, 8). An arrangement as claimed in claims 1 or 2, characterized therein that the entire insert piece (2) is arranged to be periodically entirely covered by a piece of material (9) which neutralizes some of the properties of the insert piece (2) when predetermined conditions render such neutralization desirable. An arrangement as claimed in any one of the preceding claims, characterized therein that the insert piece (13; 20) extends across the width of the entire door leaf. An arrangement as claimed in any one of claims 1 - 3, characterized therein that the insert piece (14) extends across the entire height of the door leaf.

Inventors: LARSSON, NILS HAKAN IVAR
Applicants: NOMAFA AB
Application year: 1989
Main classification: E06B9
IPC codes: E06B9, E06B3