door

Abstract

A door, which comprises a fixed frame structure (2), intended to be fixed to the structure of a building, around a walkable opening, and having a frame (3) and, in a lower region, a lowered threshold (4), located at the floor (5). The fixed frame structure (2) supports at least one movable leaf (7), for opening or closing the walkable opening. According to the invention, there are, substantially at the longitudinal ends of the threshold (4), sealing plugs (9) provided with enhanced sealing means (10), which are elastically flexible and are configured to provide a watertight seal between the threshold (4) and the frame (3) and between the leaf (7) and the frame (3), at least with the leaf (7) in the closed condition.

Description

[0001] The present invention relates to a door.

[0002] As is known, doors, like French windows and entrance doors to buildings, have, in general, a frame structure, which is fixed to the structure of the building, around a walkable opening in the building, and which supports at least one movable leaf, for opening / closing the walkable opening.

[0003] In particular, the fixed frame structure of this type of door is typically formed by an upper frame, constituted by two lateral posts and an upper lintel, and, in a lower region, by a lowered threshold, constituted by a profile located on the floor, which defines an abutment in the lower part of the door.

[0004] In order to ensure the absence of architectural barriers, the height of the threshold from the floor must be low.

[0005] This factor places limitations on the water sealing of currently known thresholds.

[0006] The aim of the present invention is to provide a door which is capable of improving the known art in one or more of the above mentioned aspects.

[0007] Within this aim, an object of the invention is to provide a door, particularly for the construction of French windows and entrance doors, that has a superior watertight seal with respect to the prior art.

[0008] Another object of the invention is to make the lower part of French windows and entrance doors more aesthetically pleasing.

[0009] Another object of the invention is to provide a door that, although it ensures a high level of water sealing, makes it easy for installation technicians to mount the threshold on the remaining part of the frame.

[0010] Another object of the invention is to provide a door that can be positively used with one or more leaves.

[0011] Another object of the invention is to allow prolonged use of the door without the risk of compromising its watertight seal or requiring burdensome interventions to replace gaskets in the threshold.

[0012] Furthermore, the present invention sets out to overcome the drawbacks of the background art in a manner that is alternative to any existing solutions.

[0013] Another object of the invention is to provide a door that is highly reliable, easy to implement and at low cost.

[0014] This aim and these and other objects which will become more apparent hereinafter are achieved by a door according to claim 1, optionally provided with one or more of the characteristics of the dependent claims.

[0015] Further characteristics and advantages of the invention will become more apparent from the description of preferred, but not exclusive, embodiments of the door according to the invention, illustrated by way of non-limiting example in the accompanying drawings wherein: Figure 1 is a front elevation view of a door according to the invention; Figure 2 is a cross-sectional view taken along the line II-II of Figure 1; Figure 3 is a perspective view of a detail of the door according to the invention, with the leaf open; Figure 4 is an enlarged-scale, partially cutaway detail of Figure 1; Figure 5 is a front elevation view of the door according to the invention in the embodiment with multiple leaves; Figure 6 is a cross-sectional view taken along the line VI-VI of Figure 5; Figure 7 is an enlarged-scale, partially cutaway detail of Figure 5; Figure 8 is a perspective view of a detail of the embodiment of Figure 5 with at least one leaf open; Figure 9 is a perspective view of a sealing plug of the door according to the invention; Figure 10 is a perspective view of a central plug of the door according to the invention; Figure 11 is a cross-sectional view, taken along a vertical plane, of the door according to the invention under conditions of particularly heavy rain; Figure 12 is a cross-sectional view, taken along a horizontal plane, of the door according to the invention under conditions of heavy rain.

[0016] With reference to the figures, the door according to the invention, generally designated by the reference numeral 1, comprises a fixed frame structure 2, which is intended to be fixed to the structure of a building, around a walkable opening.

[0017] The fixed frame structure 2 has, in particular, a frame 3 and, in a lower region, a lowered threshold element or threshold 4, placed substantially at the floor 5 of the building.

[0018] As usual, the frame 3 can comprise a pair of lateral posts 3a and 3b and an upper lintel 3c.

[0019] Advantageously, the threshold 4 comprises, in turn, a base profile 6, better described below and preferably made of plastic material, such as, for example, PVC, which is connected, conveniently, to the frame 3, substantially at its opposing ends, and anchored, in a manner that is in and of itself known, to the floor 5.

[0020] The fixed frame structure 2 furthermore supports at least one movable leaf 7, for opening or closing the walkable opening.

[0021] It should be noted that if the door is a French window, then the leaf 7 will have, as is in and of itself known, at least one glazed pane or double glazing pane 8, mounted on a movable frame 7a of the leaf proper, in order to allow natural light to enter the building.

[0022] Substantially at the longitudinal ends of the threshold 4, sealing plugs 9 are provided which have elastically flexible enhanced sealing means, which are configured to provide a watertight seal between the threshold 4 and the frame 3, as well as between the leaf 7 and the frame 3, at least when the leaf is brought to the closed condition.

[0023] Advantageously, these sealing means comprise a plurality of vertical sealing fins or tabs 10a, 10b, 10c which are elastically deformable and which protrude from the face of the corresponding sealing plug 9 that is directed toward the threshold 4.

[0024] In particular, the sealing fins 10a, 10b, 10c are arranged substantially mutually parallel and are evenly spaced apart from each other, as a result being arranged mutually side by side along a direction extending from outside inward into the building.

[0025] More specifically, the sealing fins 10a, 10b, 10c are engageable in support by at least one portion of the leaf, at least when the leaf is in the closed condition.

[0026] Conveniently, the sealing fins 10a, 10b, 10c extend vertically upward starting substantially from the upper surface of the threshold 4.

[0027] Advantageously, the lower terminal edge of the sealing fins 10a, 10b, 10c is placed resting against the base profile 6 of the threshold 4.

[0028] Basically, when the leaf 7 is being closed, the sealing fins 10a, 10b, 10c apply pressure between the corresponding sealing plug 9 and the frame 3, in so doing ensuring the seal against possible infiltrations of water in that region of the door, as well as increasing the seal between the leaf 7 and the frame 3.

[0029] Furthermore, the sealing fins 10a, 10b, 10c, by virtue of their elastic flexibility, are capable of adapting their shape automatically on the basis of the distance between the leaf 7 and the frame 3, so as to compensate the variable distance between the leaf 7 and the frame 3, so adapting to any adjustments necessary during installation.

[0030] It should be noted that the sealing fins 10a, 10b, 10c, owing to their characteristics, do not modify the opening or closing force and / or the pressure to be applied to the leaf 7 when it is being closed / opened.

[0031] Furthermore, the plurality of sealing fins 10a, 10b, 10c present offers a guarantee of sealing in any situation, since there will always be at least one sealing fin capable of closing the spaces that may be present between the threshold 4 and the frame 3 and between the leaf 7 and the frame 3.

[0032] It must also be added that the sealing fins 10a, 10b, 10c are made with a height that is such as to be capable of preventing the ingress of water inward into the building, even at high pressure. In particular, the sealing fins 10a, 10b, 10c are capable of stopping rising water even at pressures higher than 600 Pa.

[0033] For example, the sealing fins 10a, 10b, 10c can have a height substantially comprised between 40 and 60 mm.

[0034] Conveniently, it is also possible for the sealing fins 10a, 10b, 10c to have, starting from the threshold 4, a progressively increasing height, proceeding inward into the building.

[0035] Preferably, the sealing fins 10a, 10b, 10c are provided monolithically with the corresponding sealing plug 9.

[0036] More specifically, the sealing plug 9 is constituted by a main block, and the sealing fins 10a, 10b, 10c are provided on its face designed to be directed toward the threshold 4.

[0037] The sealing plug 9 is, conveniently, made of an elastically deformable plastic material, preferably soft rubber, more preferably TPE with a hardness substantially comprised between 50 and 60 Shore A.

[0038] Conveniently, the sealing plugs 9 have at least one shaped portion for insertion into the base profile 6 of the threshold 4, which enables their precise positioning in the base profile 6 of the threshold 4, so avoiding the use of glues or silicones for the lateral sealing of the base profile 6 of the threshold 4.

[0039] Advantageously, lateral fixing plugs 11 are provided and can, in turn, be fixed to the frame 3 and to the threshold 4 and are configured to be used to fix the sealing plugs 9 to the frame 3 and to the threshold 4.

[0040] In particular, the lateral fixing plugs 11 engage at least one portion of the sealing plugs 9.

[0041] Conveniently, the sealing plugs 9 have an engagement portion 9a which is adapted to connect them to the lateral fixing plugs 11, so as to ensure the vertical sealing of the door and the consequent stopping of rising water under pressure.

[0042] Basically, the fixing plugs 11 take the form of a substantially platelike element, preferably made of plastic material with high mechanical strength, reinforced with glass fiber, more preferably made from PA6 filled substantially to between 50% and 60% with glass fiber.

[0043] Advantageously, the lateral fixing plugs 11 are provided with at least one first hole 11a, adapted to fix them to the frame 3, and at least one second hole, not visible in the figures, for fixing them to the base profile 6 of the threshold 4.

[0044] Conveniently, the hole or holes 11a for fixing the lateral fixing plugs 11 to the frame 3 are positioned so as to allow the use of concealed hinges and for those hinges to be fixed integrally with the frame 3.

[0045] Advantageously, the lateral fixing plugs 11 are configured to define a supporting surface on which the concealed hinges will be arranged.

[0046] Furthermore, the lateral fixing plugs 11 are, advantageously, provided with centering elements, not visible in the figures, for positioning them accurately in the base profile 6 of the threshold 4 and in order to facilitate the positioning of the sealing plugs 9.

[0047] Conveniently, each one of the lateral fixing plugs 11 is provided with at least one containment recess 11b configured to receive at least one portion of the corresponding sealing plug 9 and, more specifically, at least its engagement portion 9a, so as to ensure the vertical sealing of the region of the door between the frame 3 and the correspond sealing plug 9 and, more generally, between the frame 3 and the lateral fixing plugs 11.

[0048] Advantageously, the leaf 7 has, on its outermost side, a drip lip, which is provided, conveniently, by means of at least one drip lip profile 12, which supports, at its ends, terminal closure plugs 13, which are adapted to cooperate with the sealing plugs 9 and, more specifically, with the sealing fins 10a, 10b, 10c, when the leaf is in the closed condition, in order to increase the seal between the leaf 7 and the frame 3.

[0049] Conveniently, the terminal closure plugs 13 are made of hard plastic material, preferably PA6 filled to 30% with glass fiber.

[0050] Preferably, the terminal closure plugs 13 are applied to the drip lip profile 12 by means of a lateral fixing screw 13a, not visible from the front.

[0051] More specifically, the body of the terminal closure plugs 13 is configured so as to present a region for applying a screw for fixing it to the leaf 7, at least one abutment surface 13b, designed to abut against the sealing plugs 9 and, more precisely, against the sealing fins 10a, 10b, 10c, an outer contoured region 13c for closing the drip lip profile 12, and at least one region configured for applying the fixing screw 13a to the drip lip profile 12.

[0052] Conveniently, the drip lip profile 12 supports at least one longitudinally extended lower closing gasket 14.

[0053] The lower closing gasket 14 is, in particular, configured to engage hermetically, at its ends, the closure plugs 9, and, longitudinally, when the leaf is in the closed condition, the threshold 4.

[0054] Advantageously, the terminal closure plugs 13 can also have an accommodation seat for the lower closing gasket 14.

[0055] In more detail, the drip lip profile 12 has, conveniently, a resting portion 12a, for mounting it on a profile 15 that provides the movable frame 7a of the leaf 7, and defines an inclined plane 12b, in order to prevent the stagnation of water on the drip lip and, consequently, to prevent, as far as possible, when the leaf 7 is wet and being opened, the water from falling onto the inside floor of the room in which the door is installed.

[0056] Advantageously, the drip lip profile 12 is, furthermore, provided with a drip edge tooth 16 which prevents the possible rise of water, a risk in the event of heavy rain on the outer surface of the leaf 7 and of the glazing 8, toward the threshold 4.

[0057] The drip lip profile 12 also defines, in its lower part, a seat 17 for the lower closing gasket 14 and, conveniently, it is provided with a space adapted to allow water drainage holes to be made, corresponding to where holes are normally made on the lower part of the leaf.

[0058] The lower closing gasket 14 is, preferably, of a type adapted to offer a guaranteed hermetic seal, a low heat transmission rate, low wear even for prolonged use, and perfect closing with the sealing plugs 9, by always ensuring a contact with at least two of the sealing fins 10a, 10b, 10c.

[0059] It should be noted that the lower closing gasket 14 is, conveniently, configured to come into abutment against the sealing fins 10a, 10b, 10c, when the leaf 7 is being closed, so as not to leave cracks between the lower closing gasket and the sealing fins 10a, 10b, 10c.

[0060] For example, the lower closing gasket 14 can be constituted by a commercial gasket made by the Schlegel company, commercially known as Q-LON.

[0061] Advantageously, the base profile 6 of the threshold 4 defines, for the leaf 7, at least one internal abutment 6a which extends longitudinally and seamlessly, and which is substantially coplanar with the frame 3.

[0062] The height of this internal abutment 6a is conveniently reduced, with respect to the floor 5, in order to allow the threshold 4 to be passed over easily by a pram, from the inside outward or vice versa. For example, the internal abutment 6a can have a height from the floor 5 substantially comprised between 13 and 17 mm.

[0063] The base profile 6 of the threshold 4 is made by extrusion. During the extrusion of the base profile 6, slots are made for draining water outward, and are provided in dedicated chambers in the base profile, as explained in more detail below.

[0064] The base profile 6 can be assembled with lateral plugs, for fixing it to the frame 3.

[0065] In this case, the base profile 6 is provided with at least one slot for fixing such lateral plugs.

[0066] Alternatively, it can be fixed directly to the frame 3, from behind, i.e. on the inside, and through the frame 3, with non-visible screws.

[0067] In this case, the base profile 6 is provided with attachment points suitable for stable fixing to the threshold 4 and, more specifically, depending on the profile used for the frame 3, at least one right-hand or left-hand slot 40 will be used to facilitate fixing the base profile 6 through the frame 3.

[0068] In both cases, the hermetic seal is ensured by the sealing plugs 9 and by the sealing fins 10a, 10b, 10c and the threshold 4 appears uniform and uninterrupted by unattractive plastic caps at the ends, as happens with most of the products on the market.

[0069] A covering profile 18 is conveniently applied to the base profile 6 of the threshold 4.

[0070] Advantageously, this covering profile 18 is configured to cover externally, and at least partially, the base profile 6 of the threshold 4 and makes it possible to ensure greater chromatic stability over time for the threshold 4.

[0071] Conveniently, the covering profile 18 is at least partially knurled, so as to be anti-skid, and is, preferably, made of metallic material, more preferably of anodized aluminum.

[0072] Advantageously, the covering profile 18 is structured so that it can be attached by pressure on the base profile 6 of the threshold 4.

[0073] The covering profile 18 is furthermore configured so that it can protect the outer silicone treatment that is normally applied at installation time.

[0074] In detail, the covering profile 18 defines, conveniently, a walkable abutment surface 18a for the sealing plugs 9 and for the lower closing gasket 14.

[0075] Advantageously, the covering profile 18 has a recessed region 18b in order to prevent water, under pressure, from rising over the threshold 4.

[0076] Conveniently, the covering profile 18 further defines an inclined external anti-skid walking surface 18c and is provided, advantageously, with drip edge teeth 19, on its side directed toward the base profile 6 of the threshold 4.

[0077] The covering profile 18 can also have, conveniently, at least one front coupling element 20 and at least one irreversible coupling element 21 for coupling it to the base profile 6 of the threshold 4, at correspondingly adapted regions in the base profile 6.

[0078] With this structure, the covering profile 18, associated with the base profile 6 of the threshold 4, defines a longitudinal abutment region that basically creates a barrier against water, in the form of the assembly constituted by threshold 4 and the drip lip profile 12, with the associated closure plugs 13, and sealing plugs 9.

[0079] It should be noted that the door according to the invention can also have two or more movable leaves 7, all supported by the fixed frame structure 2.

[0080] In this case, there are one or more central plugs 20, the function of which is to ensure the hermetic closure at the abutment exchange 21 between the leaves 7 of the door.

[0081] Advantageously, the central plugs 20 are also provided with elastically deformable vertical sealing tabs or fins 21a, 21b, 21c.

[0082] The vertical fins 21a, 21b, 21c of the central plugs 20 adapt to the shape of the leaves 7, when these are closed, and their function is twofold: closure between the threshold 4 and the frame 3 and closure between the leaf 4 and the abutment exchange 21.

[0083] Advantageously, the vertical fins 21a, 21b, 21c are provided integrally with the central plugs 20.

[0084] Preferably, the central plugs 20 are made of elastically yielding plastic material, more preferably of TPE with a hardness substantially comprised between 50 and 60 Shore A.

[0085] Conveniently, the central plugs 20 are configured based on the contour of the profiles used, in order to produce the abutment exchange 22 between the leaves 7.

[0086] Preferably, at least one central plug 20 is associated at least with the leaf 7 that carries the abutment exchange 22, against which the other leaf 7 is placed, when closed.

[0087] For completeness of description, it must also be added that the base profile 6 of the threshold 4 is provided, on its upward-facing surface, with first water drainage slots 30a which are spaced regularly apart along the longitudinal extension of the base profile 6.

[0088] Conveniently, the base profile 6 can be provided, on its outwardfacing surface, with second water drainage slots 30b which are arranged mutually spaced apart along the longitudinal extension of the base profile 6, conveniently in an offset position with respect to the first drainage slots 30a.

[0089] Conveniently, the base profile 6 defines, internally, at least one connecting chamber 31 between the first and the second drainage slots 30a and 30b, for draining water outside.

[0090] Conveniently, the base profile 6 also defines a containment tray 32 for any water that might penetrate inside from outside.

[0091] In particular, as shown in Figures 11 and 12, the containment tray 32 is, advantageously, defined proximate to the region of the threshold 4, and more specifically of the base profile 6, that is designed to be engaged by the lower closure gasket 14, when the leaf is closed.

[0092] More preferably, the containment tray 32 is positioned immediately downstream of this engagement region of the lower closure gasket 14, along the direction of advancement of any water that should penetrate inside, pushing past the lower closing gasket 14. This ensures that the water is collected inside the containment tray 32, so preventing it from continuing inside the dwelling.

[0093] Conveniently, the first drainage slots 30a are defined on the bottom of the containment tray 32, so as to ensure the complete external drainage of all the water that may have penetrated.

[0094] Advantageously, the base profile 6 is provided with feet 33 for placing on the floor 5 or on profiles that act as a thermal break between the inside floor and the outside floor and, conveniently, presents a space suitable for the application of sheaths that expand at installation time.

[0095] The base profile 6 of the threshold 4 is further provided, preferably, with at least one reinforcement to improve the grip of the fixing screws on the contact surfaces and on the concealed hinges, and with at least one seat for accommodating the concealed hinges themselves.

[0096] The base profile 6 is also provided, conveniently, with at least one fairlead cavity 34 for the installation of door monitoring systems or electronic alarm sensors.

[0097] Advantageously, the base profile 6 also has a raised platform for containing the closing contact surfaces within the walkable plane.

[0098] Conveniently, the base profile 6 further defines an external compartment 41 for containing silicone, which also ensures improved and protected adherence for the silicone.

[0099] It should be noted that, along the posts 3a and 3b of the frame 3, there is at least one first sealing gasket 50, which contributes to preventing the inflow of water between the leaf 7 and the posts 3a, 3b.

[0100] As shown in particular in Figure 12, this first gasket 50 is advantageously located at a vertical abutment region 51 against which the outer face of the movable frame 7a of the leaf 7 abuts, when said leaf is in the closed condition.

[0101] Advantageously, along the posts 3a and 3b, there can also be a second sealing gasket 52, designed to act in a more inward region of the leaf 7, i.e. in a region of the movable frame 7a of the leaf 7 that is comprised between its inner face and its outer face, for the purpose of creating a second barrier against any water that should penetrate the first sealing gasket 50. This second gasket 52 is conveniently shaped like a lip or the like, and can conveniently extend above the sealing plugs 9.

[0102] Advantageously, the second sealing gaskets 52 are arranged in a region located directly upstream of the containment tray 32, along the direction of advancement of any water that should penetrate inside from outside.

[0103] It should be noted that the first and the second sealing gasket 50 and 52 can also be conveniently provided at the abutment exchange between the leaves 7.

[0104] The operation of the door according to the invention is the following.

[0105] With the leaf or leaves 7 in the closed condition, at least one portion of the leaves 7 engages at least one of the sealing fins 10a, 10b, 10c in abutment, presenting an impassable barrier to water originating from outside.

[0106] By virtue of the presence of the sealing plugs 9 and of the corresponding sealing fins 10a, 10b, 10c, any water that might penetrate between the movable leaf 7 and the fixed frame structure 2, defeating the sealing gaskets 50 and 52, would be forced by the sealing fins 10a, 10b, 10c to fall into the containment tray 32, and then be drained outside through the first drainage slots 30a.

[0107] In practice it has been found that the invention fully achieves the intended aim and objects by providing a door, particularly for providing French windows and entrance doors, which offers an improved watertight seal with respect to the prior art, by virtue of the presence of its particular sealing plugs.

[0108] The invention furthermore makes it possible to achieve the following advantages: hermetic closure with a high degree of precision and adaptation to possible adjustments of the leaves or any settling once installed; low sound impact when the leaves are being opened and closed; low friction between the parts during closing or opening. This does not alter the effort normally necessary to close or open the leaves; ease and simplicity of mounting, which do not require particular specialist labor; no manual contrivances are required, such as, for example, the use of silicones or glues, for its correct operation; the appearance of the threshold is linear and not marred by plugs on the walking surface; the height of the sealing plugs does not allow water to rise, when driven by high winds, to spill over inside and flood the floor of the room inside; ease of replacement in the event of extraordinary damage; effective damming, determined by the presence of the particular sealing plugs and, more generally, by the combined effect of the sealing plugs, the height of these plugs, the lower closing gasket, the terminal closure plugs of the drip lip profile and, for doors with multiple leaves, the central plugs for the abutment exchange between the leaves.

[0109] It should be noted that the invention can be applied to all types of material used for door or window frames, and not only to profiles made of PVC.

[0110] The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. Moreover, all the details may be substituted by other, technically equivalent elements.

[0111] In practice, the materials used, as well as the contingent shapes and dimensions, may be any according to the requirements and to the state of the art.

[0112] The disclosures in Italian Patent Application No. 102024000024729 from which this application claims priority are incorporated herein by reference.

[0113] Where technical features mentioned in any claim are followed by reference signs, such reference signs have been inserted for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A door comprising a fixed frame structure (2), intended to be fixed to the structure of a building, around a walkable opening, and having a frame (3) and, in a lower region, a lowered threshold (4), located at the floor (5), said fixed frame structure (2) supporting at least one movable leaf (7), for opening or closing said walkable opening, characterized in that it comprises, substantially at the longitudinal ends of said threshold (4), sealing plugs (9) provided with enhanced sealing means (10), which are elastically flexible and are configured to provide a watertight seal between said threshold (4) and said frame (3) and between said leaf (7) and said frame (3), at least with said leaf (7) in the closed condition.

2. The door according to claim 1, characterized in that said sealing means (10) comprise a plurality of vertical, elastically deformable sealing fins (10a, 10b, 10c) which protrude from the face of the corresponding sealing plug (9) that is directed toward said threshold (4).

3. The door according to claim 2, characterized in that said deformable sealing fins (10a, 10b, 10c) are engageable in support by at least one portion of said leaf (7), at least with said leaf (7) in the closed condition.

4. The door according to claim 2, characterized in that said deformable sealing fins (10a, 10b, 10c) extend vertically upward starting substantially from the upper surface of said threshold (4).

5. The door according to claim 2, characterized in that said deformable sealing fins (10a, 10b, 10c) are provided monolithically with the corresponding sealing plug (9).

6. The door according to one or more of the preceding claims, characterized in that it comprises lateral fixing plugs (11), which can be fixed to said frame (3) and to said threshold (4), said lateral fixing plugs (11) engaging at least one portion of said sealing plugs (9) and being configured to provide the fixing of said sealing plugs (9) to said frame (3) and to said threshold (4).

7. The door according to one or more of the preceding claims, characterized in that said lateral fixing plugs (11) each define at least one containment recess (11b) for at least one portion of the corresponding sealing plug (9), in order to ensure the vertical sealing of the region between said frame (3) and the corresponding sealing plug (9).

8. The door according to one or more of the preceding claims, characterized in that said leaf (7) has, on its outer side, at least one drip lip profile (12) which supports, at its ends, closure plugs (13), which are adapted to cooperate with said sealing plugs (9), with said leaf (7) in the closed condition.

9. The door according to claim 8, characterized in that said drip lip profile (12) supports at least one longitudinally extended lower gasket (14), which is configured to engage hermetically, at its ends, said closure plugs (13) and, longitudinally, with said leaf (7) in the closed condition, said threshold (4).

10. The door according to one or more of the preceding claims, characterized in that said threshold (4) comprises a base profile (6) which defines at least one internal abutment (6a) for said leaf (7), and extends longitudinally, without discontinuities, and is substantially coplanar with said frame (3).

11. The door according to one or more of the preceding claims, characterized in that it comprises at least two movable leaves (7), supported by said fixed frame structure (2), and central plugs (30), for hermetic closure at the abutment exchange (22) between said leaves (7), said central plugs (30) being provided with elastically deformable vertical sealing fins (21a, 21b, 21c).

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