| JP2000220183 | ENTRANCE STRUCTURE OF BATHROOM UNIT |
| JP2005048379 | SASH |
| JP08144647 | LOWER FRAME STRUCTURE OF SASH |
LIDHOLM, Jan (Väla Källängen, Lidköping, SE-531 97, SE)
LIDHOLM, Jan (Väla Källängen, Lidköping, SE-531 97, SE)
| CLAIMS 1. Door-sill (1) for a folding door, which is comprised of a number of interconnected pivotably mounted and guided door leaf elements, or for a sliding door, characterized in that the door-sill is formed of a frame plate (4) having paired portions (11, 12) forming an elevation (10) and sloping from the centre area (5) of the intended doorway (6), that underneath (13) said frame plate (4), a longitudinal and transverse stiffener (14) is attached, and that steering grooves (2, 3) for door leaf bearings (15) extend through said frame plate (4) along the area of the elevation (10) . 2. Door-sill according to claim 1, characterized in that a number of closeable openings (18) through the door- sill (1) are arranged at the area of the respective steering groove ( 2 , 3 ) . 3. Door-sill according to claim 2, characterized in that pivotably mounted lids (17) are mounted to close the respective openings (18) from the upper side of the door-sill. 4. Door-sill according to any one of claims 2-3, characterized in that one opening (18) extends along each steering groove, (2, 3) essentially along its entire length. 5. Door-sill according to claim 4, characterized in that the opening (18) and steering grooves (2, 3) extend approximately along 1/3 of the length (L) of the door-sill on each side of the same, in case of paired double-folded doors. 6. Door-sill according to any one of the preceding claims, characterized in that the stiffener (14) is formed of a longitudinal metal ledge (19) having transverse laths (20, 21) distributed at mutual distances (A, B, C) from each other. 7. Door-sill according to claim 6, characterized in that the transverse laths (20, 21) have a shape fitting to the intended inclination of the sloping portions (24, 25) of the door-sill, and that the transverse laths (20, 21) end at a distance from the respective edge (26, 27) of the sloping portions (24, 25) . 8. Door-sill according to any one of claims 5-7, characterized in that through recesses (28) of the respective laths (21) are arranged in a line for the formation of a duct. 9. Door-sill according to any one of the preceding claims, characterized in that cutouts (29) in the corners of the door-sill are arranged to be interconnected with doorframes (30, 31) . 10. Door-sill according to any one of the preceding claims, characterized in that, in the interior space (16) of the door-sill, a heater is arranged for the door-sill (1) and its appurtenant parts. |
interconnected pivotably mounted and guided door leaf elements, or for a sliding door.
Doors of the type mentioned are normally guided by grooves arranged at the upper and/or lower part of the door. In case they are guided at the bottom, there are usually arranged grooves recessed in milled-out cavities in the floor. Such grooves risk being filled up by various undesired items, snow, ice, etc., with the risk of the function of the door being impaired and, in the worst case, the door not at all being possible to affect to be opened and/or closed. Such grooves also become very dominating and clearly visible, which maybe is not altogether good as regards the aesthetic design of the door and its frame.
A door having such a guide down at the door- sill of the door is shown as an example with reference to
G8808896.0U1. See particularly Fig. 2 that shows an elongate groove in the form of a chute in the door-sill of the door and in which lower guides for the paired doors are received, with the risk of said grooves being filled up with gravel and sand when people and vehicles pass over said door-sill.
Folding doors are suitably used for larger door or gate openings in connection with industrial premises or the like, even if their use is not limited to such applications. Folding doors reguire a minimum of free space around the doorway to be covered, since the sections of the door leaves in the open position are folded around the pivot axes and thereby can find room inside the doorframes, which differs considerably from sliding doors that require at least equally large lateral space, as counted from the doorframe, as the width of the sliding door, and also from laterally suspended industrial gates or hinged doors that require large lateral space and also may involve great stresses on the side hinges of the gates, in particular if it comes to wide doorways.
However, both types of doors, i.e., sliding doors and folding doors, normally require a door-sill for the guiding of the door leaves at the bottom.
Therefore, the main object of the present invention is primarily, among other things, to solve the above- mentioned problems as well as to provide a door-sill in which the locating grooves in question can be concealed efficiently and that is easy and cost-effective to produce and that allows easy cleaning of the grooves from dirt and the like.
Said object is achieved by means of a door-sill according to the present invention that essentially is
characterized in that the door-sill is formed of a frame plate having paired portions forming an elevation and sloping from the centre area of the intended doorway, that underneath said frame plate, a longitudinal and transverse stiffener is
attached, and that steering grooves for door leaf bearings extend through said frame plate along the area of the
elevation .
The invention is described below in the form of a preferred embodiment example, reference being made to the accompanying drawings, in which
Fig. 1 shows a schematic perspective view of a door-sill according to the invention as seen obliquely from above and from the side,
Fig. la schematically shows a door according to the invention having a door-sill, Figs. 2-3 show perspective views of the door- sill as seen obliquely from the side of its upper side and its underside, respectively,
Fig. 4 shows a planar view of the door-sill from above,
Fig. 5 shows an end view of the door-sill, and Fig. 6 shows in a front view example of a folding door provided with a door-sill according to the invention, where
Figs. 7-9 show portions of said folding door including utilized door-sill according to the invention.
According to the present invention, a door-sill 1 intended for a folding door, which is comprised of a number of row-shaped interconnected pivotably mounted door leaf elements 8, 9 mounted and guided in steering grooves 2, 3, or for a sliding door 7, is formed of a frame plate 4 that is provided with paired portions 11, 12 forming an elevation 10 and sloping slightly downward from the centre area 5 of the intended doorway 6. On the underside 13 of said frame plate 4, a longitudinal and transverse stiffener 14 is attached, said steering grooves 2, 3, intended for the receipt of the
bearing/guiding 15 of lower door leaves, extending through said frame plate 4 along the area of the elevation 10. In order to be able to get access to clean in the interior space 16 of the door-sill, there are arranged a number of openings 18 that are closeable by covers 17 and extend through the door-sill, at the area of the respective steering groove 2, 3, essentially along the entire length B of the respective steering groove 2, 3. The respective opening 18 is arranged to be closeable by means of a pivotably mounted lid 17 that is arranged to close the
respective opening 18 in the direction from the upper side of the door-sill. In the example shown, the opening 18 and steering grooves 2, 3 extend approximately along 1/3 of the length L of the door-sill on each side of the same in case of paired double-folded doors, but at least that the opening 18 extends essentially as far as the length B of the respective steering groove 2, 3. The stiffener 14 arranged in the interior space 16 of the door-sill is formed of a longitudinal section or solid metal ledge 19 and having transverse laths 20, 21 that extend in mutually opposite directions 22, 23 in groups at mutual distances A, B, C from each other.
Preferably, said transverse 22, 23 laths 20, 21 have a shape that fits to the intended inclination of the sloping portions 24, 25 of the door-sill and the floor, and end at a distance from its respective edge 26, 27.
In the interior space 16 of the door-sill, there is preferably arranged a heater (not shown) that is intended for heating at least the outwardly facing portions 25 of the door-sill 1, and through recesses 28 of the respective laths 21 are arranged in a line for the formation of a duct.
Finally, cutouts 29 in the corners of the door- sill are arranged to be interconnected with doorframes 30, 31.
A folding door stand is shown in Fig. 6 in a front view, and from this figure, it is seen that the doorframe as well as the overhead frame part consist of a tray-shaped section of a relatively large depth. In the door-sill part 1, there are arranged man hole covers 17, for allowing cleaning under existing steering grooves 2, 3 for the movement of the door leaf sections 8, 9 and for the area under the door-sill.
As is seen in this Fig. 6, the doorframe 40, the door-sill part 1 and the overhead frame part 50 form a uniting stand 60 that constitutes a closed unit comprising the foldable door leaf sections 8, 9, steering grooves 2, 3 for the same and a driving device (not shown in more detail) for the operation of the door leaf sections, which is situated behind an access door 70 shown in the closed position at the top in Fig. 6.
On the underside of the door-sill part 1, there is also a space 16 for the fitting of a heating system on the outdoor side of the stand 60.
The nature and function of the door-sill should have been clear from what has been described above and shown in the drawings, but the invention is naturally not limited to the embodiment described above and shown in the accompanying drawings. Modifications are feasible, particularly as for the nature of the different parts, or by using an equivalent technique, without departing from the protection area of the invention, such as it is defined in the claims.
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