A sill for an elevator door

Abstract

A sill (1) for an elevator door, comprising: - a base (2) extending mainly in a longitudinal direction and comprising a first upper projecting portion (21) and a second upper projecting portion (22) separated by a first groove (23) that is open in an upwards direction; − at least a first profiled element (3) joint-fitted on the first upper projecting portion (21); - a second profiled element (4) joint-fitted on the second upper projecting portion (22); the first profiled element (3) and the second profiled element (4) have respectively a first lip (3a) and a second lip (4a) penetrating into the first groove (23) thus defining a guide for the sliding of a leaf (100) of the elevator door, each lip (3a, 4a) has a free end (13, 14) with an enlarged cross-section which defines a recess counter-shaped to a free end of the 15 corresponding upper projecting portions so that the lip snap-fits on the base.

Description

Technical field

[0001] The present invention relates to a sill for an elevator door and to a door comprising said sill.

[0002] The sill can be used in combination with sliding doors with central opening of the leaves or with side telescopic opening, with linear and curvilinear sliding leaves, with leaves having a mechanism situated in the upper zone of the leaves and with leaves having a mechanism positioned at the bottom.Background art

[0003] The landing doors of elevators are normally provided at the bottom with shoes that slide in a groove formed in the sill and have the purpose of keeping the leaves inside the guide during the opening and closing movement that occurs when the car is at the landing door.

[0004] However, stresses, impacts and shoves on the door from the outside could cause the shoes to derail from their sliding groove, thus freeing the door from the lower constraint and dangerously allowing the door to provide free access to the lift or elevator shaft, also in the absence of the car.

[0005] In order to avoid this possibility, in the past manufacturers of doors for elevators have sought to produce very sturdy, heavy doors, such as to withstand high stresses. However, this gave rise to significant costs for said doors in order that they meet the necessary resistance and safety requirements.

[0006] In order to overcome these disadvantages, the Applicant developed an anti-derailing device, described in document WO 2011 / 042925 A2, comprising an element, associated with the shoe or with the leaf, which is shaped like a hook so as to hook to at least one corresponding bent edge hook-like shaped of the groove defining an interference between the terminal part of the end and the terminal part of the edge of the groove in response to a stress on the leaf which tends to produce the derailment of the shoe.

[0007] As for the sills, many designs have been developed, among which document EP 0803463 proposes a sill for landing which comprises: a steel lower profiled element, suitably corrugated to define at least one groove for the sliding of a leaf provided with sliders or rollers; an aluminum upper profiled element, counter-shaped with respect to the lower one and joint-fitted on the latter.

[0008] The choice of the materials of the profiled elements, steel for the lower core and aluminum for the top cover, while being an improvement with respect to previous solutions in terms of weight and cost, still has its drawbacks.

[0009] For example, the sliders have a plastic portion that tends to wear, thus they require periodic replacement.

[0010] Since the sliders are fixed to the leaves, the maintenance is long and costly.

[0011] The components of the sill of EP 0803463 also require high production costs, due to the need to produce plates or metal profiles provided with many curves, in different materials.

[0012] In patent EP 3747819, which shows the preamble of claim 1, in the name of the Applicant it is disclosed a sill with the edges or protuberances of the lower profiled element that taper the groove and with the inner lip of the upper profiled element that integrates or "simulates" the wearable portion of the slider, thus reducing the width of the groove. Reducing the groove has the advantage of limiting or entirely avoiding tripping, access problems with wheelchairs or walkers provided with wheels, stretchers, unintentional dropping of small objects, etc.

[0013] Indeed, the production of conventional door sills leads to high production costs since it is necessary to manufacture plates or metal profiles provided with many bends in different materials.

[0014] There is still felt the need to further improve the reliability of a sill, at the same time also reducing complexity, maintenance times and costs.

[0015] In this context, the technical task at the basis of the present invention is to propose a sill for an elevator door, which overcomes the drawbacks of the prior art cited above.

[0016] In particular, it is an object of the present invention to provide a sill for an elevator door, which is easier, quicker, and cheaper to manufacture with respect to prior art solutions.

[0017] Another object of the present invention is to provide a sill for an elevator door, showing a lower structural complexity than prior art solutions, thus also achieving lower maintenance time and costs.

[0018] Another object of the present invention is to provide a sill for an elevator door, having a higher reliability than prior art solutions, in particular in limiting or entirely avoiding tripping, access problems with wheelchairs or walkers provided with wheels, stretchers, unintentional dropping of small objects, etc.Disclosure of the invention

[0019] The stated technical task and specified aims are substantially achieved by a sill for an elevator door, comprising: a base extending mainly in a longitudinal direction and comprising a first upper projecting portion and a second upper projecting portion separated by a first groove that is open in an upwards direction; at least a first profiled element extending mainly in said longitudinal direction and defining a first cavity, the first profiled element being joint-fitted on the base in such a way that the first upper projecting portion engages the first cavity; a second profiled element extending mainly in said longitudinal direction and defining a second cavity, the second profiled element being joint-fitted on the base in such a way that the second upper projecting portion engages the second cavity.

[0020] The first profiled element and said second profiled element have respectively a first lip and a second lip penetrating into the first groove thus defining a guide for the sliding of a leaf of the elevator door.

[0021] Each of the lips have a free end with an enlarged cross-section which defines a recess counter-shaped to a free end of the corresponding upper projecting portions so that the lips snap-fit on the base.

[0022] According to one aspect of the invention, the free end of each of the lips is inwardly bent towards the corresponding cavity.

[0023] In one embodiment of the invention, the free end of each of the lips has a triangular cross-section.

[0024] According to one aspect of the invention, the first profiled element and the second profiled element are applied to the base specularly with respect to the first groove.

[0025] According to one embodiment of the invention, the base is made of a single piece and consists of a plate-like body bent and shaped so as to define the first upper projecting portion, the second upper projecting portion and the first groove.

[0026] In one example, the first upper projecting element and the second upper projecting element are identical in shape and dimensions, and the first profile element and the second profiled element are identical in shape and dimensions.

[0027] According to another embodiment of the invention, the base further comprises a third upper projecting portion which is separated from the first upper projecting portion by a second groove.

[0028] The sill further comprises a third profiled element extending mainly in said longitudinal direction and defining a third cavity. The third profiled element is joint-fitted on the base in such a way that the third upper projecting portion engages the third cavity.

[0029] The third profiled element also has a third lip penetrating into the second groove thus defining a guide for the sliding of another leaf of the elevator door. The third lip has a free end with an enlarged cross-section which defines a recess counter-shaped to a free end of the third upper projecting portion so that the third lip snap-fits on the base.

[0030] According to one aspect of the invention, the base comprises a first piece and a second piece that are joined together. The first piece is bent to create the second upper projecting portion and the third upper projecting portion. The second piece is bent to create the first upper portion. The second piece is located within a cavity defined by the first piece.

[0031] For example, the base is made of one of following materials: plastic, steel, Carbon steel, aluminum, and each of the profiled elements is made of one of the following materials: plastic, steel, Carbon Steel, aluminum.

[0032] The stated technical task and specified aims are substantially achieved by a door for an elevator, for example a landing door or a car door, comprising: the sill according to the invention; at least one door leaf sliding in the sill; a sliding shoe slidingly mounted in the first groove of the sill (1) so as to make the door leaf slide along a prevailing direction; an anti-derailment device comprising at least one hook-like shaped element which is partially inserted in the shoe and penetrating within a hollow part of the base of the sill.

[0033] The hook-like shaped element is connected to the door leaf.

[0034] Preferably, the door comprises fasteners for attaching the hook-like shaped element to the door leaf.

[0035] According to one embodiment, the hook-like shaped element is obtained in a single piece and consists of a plate-like body bent and shaped so as to form a hook.

[0036] For example, the hook-like shaped element is made of one of following materials: steel, Carbon steel, aluminum.

[0037] According to one aspect of the invention, the door further comprises a support plate defining a monorail guide in order to convey and guide a corresponding rapid carriage and slow carriage.

[0038] In one embodiment, the monorail guide is obtained by a plate-like body which is subject to: a first 90° bending; a second 90° bending following said first 90° bending; a third 90° bending following said second 90° bending; a 180° open hemming at an open edge formed after the third 90° bending. Brief description of drawings

[0039] Further characteristics and advantages of the present invention will more fully emerge from the non-limiting description of a preferred but not exclusive embodiment of a sill for an elevator door and of a door comprising said sill, as illustrated in the accompanying drawings in which: figure 1 illustrates a sill for an elevator door, in cross-section, according to a first embodiment of the present invention; figure 2 illustrates the sill of figure 1, in which the bendings for obtaining a base of the sill are shown; figure 3 illustrates a sill for an elevator door, in cross-section, according to a second embodiment of the present invention; figure 4 illustrates a landing door, in front view, according to the present invention; figure 5 illustrates the sill and the anti-derailment device of the landing door of figure 4, in cross-sectional view; figure 6 illustrates the hook-like shaped element of the landing door of figure 4, in cross-sectional view; figure 7 illustrates a support plate for of the landing door of figure 4, in a cross-sectional view; figure 8 illustrates a monorail guide of the support plate of figure 7, in a cross-sectional view. Detailed description of preferred embodiments of the invention

[0040] With reference to the figures, number 1 indicates a sill for a door 200 of an elevator, i.e. a landing door or a car door.

[0041] The sill 1 comprises at least: a base 2 extending mainly in a longitudinal direction; a first upper profiled element 3 and a second upper profiled element 4, which extend mainly in the same longitudinal direction.

[0042] The base 2 comprises at least a first upper projecting portion 21 and a second upper projecting portion 22 separated by a first groove 23 that is open in an upwards direction for the sliding of a leaf 100 of the landing door (as will be better understood in the following).

[0043] In this context, the first groove 23 is also referred to as "first channel" and the leaf 100 is also referred to as "door leaf".

[0044] According to a first embodiment, shown in figure 1, the base 2 is made of a single piece. In particular, the base 2 consists of a plate-like body bent and shaped so as to define the upper projecting portions 21, 22 and the first groove 23.

[0045] A process for manufacturing the base 2 starting from a plate-like body comprises the following steps: making a first 90° bending (indicated as 1A in figure 2), for example using a standard bending machine; making a second 90° bending (indicated as 1A in figure 2), following the first 90° bending; making a third 90° bending (indicated as 1C in figure 2), following the second 90° bending; making a fourth 90° bending (indicated as 1C in figure 2), following the third 90° bending; making a fifth 90° bending (indicated as 1E in figure 2), following the fourth 90° bending; making a sixth 90° bending (indicated as 1F in figure 2) following the fifth 90° bending.

[0046] Preferably, the first upper projecting portion 21 and the second upper projecting portion 22 are identical in shape and dimensions.

[0047] Accordingly, also the first profiled element 3 and the second profiled element 4 are preferably identical in shape and dimensions, and they are applied respectively to the base 2 specularly with respect to the first groove 23.

[0048] In particular, the first profiled element 3 defines a first cavity 31 and is joint-fitted on the base 2 in such a way that the first upper projecting portion 21 engages the first cavity 31.

[0049] The second profiled element 4 defines a second cavity 41 and is joint-fitted on the base 2 in such a way that the second upper projecting portion 22 engages the second cavity 41.

[0050] The first profiled element 3 and the second profiled element 4 partially penetrate in the first groove 23 of the base 2 thus defining a guide for the sliding of the leaf 100.

[0051] In particular, the first profiled element 3 and the second profiled element 4 have respectively a first lip 3a and a second lip 4a penetrating into the first groove 23 thus defining said guide for the sliding of the leaf 100.

[0052] Advantageously, each of the lips 3a, 4a has a free end 13, 14 with an enlarged cross-section which defines a recess counter-shaped to a free end 210, 220 of the corresponding upper projecting portions 21, 22 so that the lips 3a, 4a snap-fit on the base 2.

[0053] In this context, the term "snap-fit" is synonym of clip on fitting.

[0054] Preferably, the free end 13, 14 of each of the lips 3a, 4a is inwardly bent towards the corresponding cavity 31, 41.

[0055] More preferably, the free end 13, 14 of each the lips 3a, 4a has a triangular cross-section.

[0056] In practice, the two upper profiled elements 2, 3 can integrate a plastic slider or define its functionality inherently with their shapes.

[0057] According to a second embodiment, shown in figure 2, the base 2 further comprises a third upper projecting portion 24 which is separated from the first upper projecting portion 21 by a second groove 25.

[0058] In this embodiment, the sill 1 further comprises a third profiled element 5 extending mainly in the longitudinal direction and defining a third cavity 51.

[0059] The third profiled element 5 is joint-fitted on the base 2 in such a way that the third upper projecting portion 24 engages the third cavity 51.

[0060] According to an aspect of the invention, the third profiled element 5 has a third lip 5a penetrating into the second groove 25 thus defining a guide for the sliding of another leaf 100 of the elevator door.

[0061] Advantageously, the third lip 5a has a free end 15 with an enlarged cross-section which defines a recess counter-shaped to a free end 240 of the third upper projecting portion 24 so that the third lip 5a snap-fits on the base 2.

[0062] In the second embodiment, the base 2 comprises a first piece 2a and a second piece 2b that are joined together.

[0063] The first piece 2a is bent to create the second upper projecting portion 22 and the third upper projecting portion 24, whereas the second piece 2b is bent to create the first upper portion 21.

[0064] In particular, the second piece 2b is located within a cavity defined by the first piece 2a.

[0065] In particular, the first upper projecting portion 21 is interposed between the second upper projecting portion 22 ad the third upper projecting portion 24.

[0066] For example, the second piece 2b is welded to the first piece 2a.

[0067] The second embodiment is specifically meant for a telescopic elevator door since there are two grooves 23, 25 (or channels), each for a leaf of the door.

[0068] According to another embodiment, not shown, the base 2 can have further upper projecting portions, thus obtaining further grooves for further leaves of the door. Each projecting portion has its own profiled element applied by snap-fit.

[0069] Advantageously, the base 2 is made of one of following materials: plastic, steel, Carbon steel, aluminum.

[0070] The upper profiled elements 3, 4, 5 can also be made from a choice of one of the following materials: plastic, steel, Carbon steel, aluminum.

[0071] In one embodiment of the invention, each of upper profiled elements 3, 4, 5 consists of an extruded plastic body.

[0072] According to one example, a coating is applied on the base 2 and / or the upper profiled elements 3, 4, 5, when they are made of Carbon steel.

[0073] Indeed, galvanized pre or post coating is applied for providing corrosion resistance to Carbon steel.

[0074] With reference to the figure, number 200 indicates a door for an elevator, comprising the proposed sill 1. The door 200 can be a landing door or a car door.

[0075] The door 200 can comprise one door leaf 100 or a plurality of door leaves 100, for example in case of a telescopic arrangement.

[0076] The door 200 also comprises at least one sliding shoe 102 slidingly mounted in the grooves of the sill 1, for example in the first groove 23 in case of a single door leaf 100, so as to make the door leaf 100 slide along a prevailing direction.

[0077] The door 200 further comprises an anti-derailment device comprising at least one hook-like shaped element 103 which is partially inserted in the shoe 102 and penetrating within a hollow part of the base 2 of the sill 1 so as to engage it in response to a stress on the leaf 101 which tends to produce the derailment of the shoe 102.

[0078] The hook-like shaped element 103 is connected to the door leaf 100, preferably by means of fasteners 104.

[0079] According to a preferred embodiment, the hook-like shaped element 103 is obtained in a single piece and consists of a plate-like body bent and shaped so as to form a hook.

[0080] Preferably, the hook-like shaped element 103 is made of one of following materials: steel, Carbon steel, aluminum.

[0081] A coating may be applied on the hook-like shaped element 103 when it is made of Carbon steel.

[0082] Indeed, galvanized pre or post coating is applied for providing corrosion resistance to Carbon steel.

[0083] A process for manufacturing the hook-like shaped element 103 comprises the following steps: making a first 90° bending (indicated as 1A in figure 6) using a standard bending machine; making a second 90° bending (indicated as 1B in figure 6) following the first 90° bending; making a third 45° bending (indicated as 1C in figure 6) following the second 90° bending.

[0084] According to an embodiment of the invention, the landing door 200 further comprises a support plate 110 for mounting the operating mechanisms of said door. Even if it is known, for example by document EP 1176113 B1 to provide a single guide (also called here "monorail guide") in order to convey and guide a corresponding rapid carriage and slow carriage, in the proposed invention the monorail guide 111 has a specific new shape.

[0085] A process for manufacturing the monorail guide 111 comprises the following steps: making a first 90° bending (indicated as 1A in figure 8) using a standard bending machine; making a second 90° bending (indicated as 1B in figure 8) following the first 90° bending; making a third 90° bending (indicated as 1C in figure 8) following the second 90° bending; making a 180° open hemming (indicated as 1D in figure 8) at the open edge formed after the third 90° bending.

[0086] The characteristics of the sill for an elevator door according to the present invention emerge clearly from the above description, as do the advantages.

[0087] In particular, thanks to the simple design, the proposed sill can be assembled easily and quickly. In addition, the simple structural profile allows a quick and cheap maintenance.

[0088] Furthermore, the sill is lighter than known solutions.

[0089] The sill can also be used for a telescopic door by simply joining more pieces, placed one inside the others for creating further channels for the the leaves.

Examples

first embodiment

[0044] shown in figure 1, the base 2 is made of a single piece. In particular, the base 2 consists of a plate-like body bent and shaped so as to define the upper projecting portions 21, 22 and the first groove 23.

[0045]A process for manufacturing the base 2 starting from a plate-like body comprises the following steps:

making a first 90° bending (indicated as 1A in figure 2), for example using a standard bending machine; making a second 90° bending (indicated as 1A in figure 2), following the first 90° bending; making a third 90° bending (indicated as 1C in figure 2), following the second 90° bending; making a fourth 90° bending (indicated as 1C in figure 2), following the third 90° bending; making a fifth 90° bending (indicated as 1E in figure 2), following the fourth 90° bending; making a sixth 90° bending (indicated as 1F in figure 2) following the fifth 90° bending.

[0046]Preferably, the first upper projecting portion 21 and the second upper projecting portion 22 are identical ...

second embodiment

[0057] shown in figure 2, the base 2 further comprises a third upper projecting portion 24 which is separated from the first upper projecting portion 21 by a second groove 25.

[0058]In this embodiment, the sill 1 further comprises a third profiled element 5 extending mainly in the longitudinal direction and defining a third cavity 51.

[0059]The third profiled element 5 is joint-fitted on the base 2 in such a way that the third upper projecting portion 24 engages the third cavity 51.

[0060]According to an aspect of the invention, the third profiled element 5 has a third lip 5a penetrating into the second groove 25 thus defining a guide for the sliding of another leaf 100 of the elevator door.

[0061]Advantageously, the third lip 5a has a free end 15 with an enlarged cross-section which defines a recess counter-shaped to a free end 240 of the third upper projecting portion 24 so that the third lip 5a snap-fits on the base 2.

[0062]In the second embodiment, the base 2 comprises a first piece...

Technical field

[0001] The present invention relates to a sill for an elevator door and to a door comprising said sill.

[0002] The sill can be used in combination with sliding doors with central opening of the leaves or with side telescopic opening, with linear and curvilinear sliding leaves, with leaves having a mechanism situated in the upper zone of the leaves and with leaves having a mechanism positioned at the bottom.Background art

[0003] The landing doors of elevators are normally provided at the bottom with shoes that slide in a groove formed in the sill and have the purpose of keeping the leaves inside the guide during the opening and closing movement that occurs when the car is at the landing door.

[0004] However, stresses, impacts and shoves on the door from the outside could cause the shoes to derail from their sliding groove, thus freeing the door from the lower constraint and dangerously allowing the door to provide free access to the lift or elevator shaft, also in the absence of the car.

[0005] In order to avoid this possibility, in the past manufacturers of doors for elevators have sought to produce very sturdy, heavy doors, such as to withstand high stresses. However, this gave rise to significant costs for said doors in order that they meet the necessary resistance and safety requirements.

[0006] In order to overcome these disadvantages, the Applicant developed an anti-derailing device, described in document WO 2011 / 042925 A2, comprising an element, associated with the shoe or with the leaf, which is shaped like a hook so as to hook to at least one corresponding bent edge hook-like shaped of the groove defining an interference between the terminal part of the end and the terminal part of the edge of the groove in response to a stress on the leaf which tends to produce the derailment of the shoe.

[0007] As for the sills, many designs have been developed, among which document EP 0803463 proposes a sill for landing which comprises: a steel lower profiled element, suitably corrugated to define at least one groove for the sliding of a leaf provided with sliders or rollers; an aluminum upper profiled element, counter-shaped with respect to the lower one and joint-fitted on the latter.

[0008] The choice of the materials of the profiled elements, steel for the lower core and aluminum for the top cover, while being an improvement with respect to previous solutions in terms of weight and cost, still has its drawbacks.

[0009] For example, the sliders have a plastic portion that tends to wear, thus they require periodic replacement.

[0010] Since the sliders are fixed to the leaves, the maintenance is long and costly.

[0011] The components of the sill of EP 0803463 also require high production costs, due to the need to produce plates or metal profiles provided with many curves, in different materials.

[0012] In patent EP 3747819, which shows the preamble of claim 1, in the name of the Applicant it is disclosed a sill with the edges or protuberances of the lower profiled element that taper the groove and with the inner lip of the upper profiled element that integrates or "simulates" the wearable portion of the slider, thus reducing the width of the groove. Reducing the groove has the advantage of limiting or entirely avoiding tripping, access problems with wheelchairs or walkers provided with wheels, stretchers, unintentional dropping of small objects, etc.

[0013] Indeed, the production of conventional door sills leads to high production costs since it is necessary to manufacture plates or metal profiles provided with many bends in different materials.

[0014] There is still felt the need to further improve the reliability of a sill, at the same time also reducing complexity, maintenance times and costs.

[0015] In this context, the technical task at the basis of the present invention is to propose a sill for an elevator door, which overcomes the drawbacks of the prior art cited above.

[0016] In particular, it is an object of the present invention to provide a sill for an elevator door, which is easier, quicker, and cheaper to manufacture with respect to prior art solutions.

[0017] Another object of the present invention is to provide a sill for an elevator door, showing a lower structural complexity than prior art solutions, thus also achieving lower maintenance time and costs.

[0018] Another object of the present invention is to provide a sill for an elevator door, having a higher reliability than prior art solutions, in particular in limiting or entirely avoiding tripping, access problems with wheelchairs or walkers provided with wheels, stretchers, unintentional dropping of small objects, etc.Disclosure of the invention

[0019] The stated technical task and specified aims are substantially achieved by a sill for an elevator door, comprising: a base extending mainly in a longitudinal direction and comprising a first upper projecting portion and a second upper projecting portion separated by a first groove that is open in an upwards direction; at least a first profiled element extending mainly in said longitudinal direction and defining a first cavity, the first profiled element being joint-fitted on the base in such a way that the first upper projecting portion engages the first cavity; a second profiled element extending mainly in said longitudinal direction and defining a second cavity, the second profiled element being joint-fitted on the base in such a way that the second upper projecting portion engages the second cavity.

[0020] The first profiled element and said second profiled element have respectively a first lip and a second lip penetrating into the first groove thus defining a guide for the sliding of a leaf of the elevator door.

[0021] Each of the lips have a free end with an enlarged cross-section which defines a recess counter-shaped to a free end of the corresponding upper projecting portions so that the lips snap-fit on the base.

[0022] According to one aspect of the invention, the free end of each of the lips is inwardly bent towards the corresponding cavity.

[0023] In one embodiment of the invention, the free end of each of the lips has a triangular cross-section.

[0024] According to one aspect of the invention, the first profiled element and the second profiled element are applied to the base specularly with respect to the first groove.

[0025] According to one embodiment of the invention, the base is made of a single piece and consists of a plate-like body bent and shaped so as to define the first upper projecting portion, the second upper projecting portion and the first groove.

[0026] In one example, the first upper projecting element and the second upper projecting element are identical in shape and dimensions, and the first profile element and the second profiled element are identical in shape and dimensions.

[0027] According to another embodiment of the invention, the base further comprises a third upper projecting portion which is separated from the first upper projecting portion by a second groove.

[0028] The sill further comprises a third profiled element extending mainly in said longitudinal direction and defining a third cavity. The third profiled element is joint-fitted on the base in such a way that the third upper projecting portion engages the third cavity.

[0029] The third profiled element also has a third lip penetrating into the second groove thus defining a guide for the sliding of another leaf of the elevator door. The third lip has a free end with an enlarged cross-section which defines a recess counter-shaped to a free end of the third upper projecting portion so that the third lip snap-fits on the base.

[0030] According to one aspect of the invention, the base comprises a first piece and a second piece that are joined together. The first piece is bent to create the second upper projecting portion and the third upper projecting portion. The second piece is bent to create the first upper portion. The second piece is located within a cavity defined by the first piece.

[0031] For example, the base is made of one of following materials: plastic, steel, Carbon steel, aluminum, and each of the profiled elements is made of one of the following materials: plastic, steel, Carbon Steel, aluminum.

[0032] The stated technical task and specified aims are substantially achieved by a door for an elevator, for example a landing door or a car door, comprising: the sill according to the invention; at least one door leaf sliding in the sill; a sliding shoe slidingly mounted in the first groove of the sill (1) so as to make the door leaf slide along a prevailing direction; an anti-derailment device comprising at least one hook-like shaped element which is partially inserted in the shoe and penetrating within a hollow part of the base of the sill.

[0033] The hook-like shaped element is connected to the door leaf.

[0034] Preferably, the door comprises fasteners for attaching the hook-like shaped element to the door leaf.

[0035] According to one embodiment, the hook-like shaped element is obtained in a single piece and consists of a plate-like body bent and shaped so as to form a hook.

[0036] For example, the hook-like shaped element is made of one of following materials: steel, Carbon steel, aluminum.

[0037] According to one aspect of the invention, the door further comprises a support plate defining a monorail guide in order to convey and guide a corresponding rapid carriage and slow carriage.

[0038] In one embodiment, the monorail guide is obtained by a plate-like body which is subject to: a first 90° bending; a second 90° bending following said first 90° bending; a third 90° bending following said second 90° bending; a 180° open hemming at an open edge formed after the third 90° bending. Brief description of drawings

[0039] Further characteristics and advantages of the present invention will more fully emerge from the non-limiting description of a preferred but not exclusive embodiment of a sill for an elevator door and of a door comprising said sill, as illustrated in the accompanying drawings in which: figure 1 illustrates a sill for an elevator door, in cross-section, according to a first embodiment of the present invention; figure 2 illustrates the sill of figure 1, in which the bendings for obtaining a base of the sill are shown; figure 3 illustrates a sill for an elevator door, in cross-section, according to a second embodiment of the present invention; figure 4 illustrates a landing door, in front view, according to the present invention; figure 5 illustrates the sill and the anti-derailment device of the landing door of figure 4, in cross-sectional view; figure 6 illustrates the hook-like shaped element of the landing door of figure 4, in cross-sectional view; figure 7 illustrates a support plate for of the landing door of figure 4, in a cross-sectional view; figure 8 illustrates a monorail guide of the support plate of figure 7, in a cross-sectional view. Detailed description of preferred embodiments of the invention

[0040] With reference to the figures, number 1 indicates a sill for a door 200 of an elevator, i.e. a landing door or a car door.

[0041] The sill 1 comprises at least: a base 2 extending mainly in a longitudinal direction; a first upper profiled element 3 and a second upper profiled element 4, which extend mainly in the same longitudinal direction.

[0042] The base 2 comprises at least a first upper projecting portion 21 and a second upper projecting portion 22 separated by a first groove 23 that is open in an upwards direction for the sliding of a leaf 100 of the landing door (as will be better understood in the following).

[0043] In this context, the first groove 23 is also referred to as "first channel" and the leaf 100 is also referred to as "door leaf".

[0044] According to a first embodiment, shown in figure 1, the base 2 is made of a single piece. In particular, the base 2 consists of a plate-like body bent and shaped so as to define the upper projecting portions 21, 22 and the first groove 23.

[0045] A process for manufacturing the base 2 starting from a plate-like body comprises the following steps: making a first 90° bending (indicated as 1A in figure 2), for example using a standard bending machine; making a second 90° bending (indicated as 1A in figure 2), following the first 90° bending; making a third 90° bending (indicated as 1C in figure 2), following the second 90° bending; making a fourth 90° bending (indicated as 1C in figure 2), following the third 90° bending; making a fifth 90° bending (indicated as 1E in figure 2), following the fourth 90° bending; making a sixth 90° bending (indicated as 1F in figure 2) following the fifth 90° bending.

[0046] Preferably, the first upper projecting portion 21 and the second upper projecting portion 22 are identical in shape and dimensions.

[0047] Accordingly, also the first profiled element 3 and the second profiled element 4 are preferably identical in shape and dimensions, and they are applied respectively to the base 2 specularly with respect to the first groove 23.

[0048] In particular, the first profiled element 3 defines a first cavity 31 and is joint-fitted on the base 2 in such a way that the first upper projecting portion 21 engages the first cavity 31.

[0049] The second profiled element 4 defines a second cavity 41 and is joint-fitted on the base 2 in such a way that the second upper projecting portion 22 engages the second cavity 41.

[0050] The first profiled element 3 and the second profiled element 4 partially penetrate in the first groove 23 of the base 2 thus defining a guide for the sliding of the leaf 100.

[0051] In particular, the first profiled element 3 and the second profiled element 4 have respectively a first lip 3a and a second lip 4a penetrating into the first groove 23 thus defining said guide for the sliding of the leaf 100.

[0052] Advantageously, each of the lips 3a, 4a has a free end 13, 14 with an enlarged cross-section which defines a recess counter-shaped to a free end 210, 220 of the corresponding upper projecting portions 21, 22 so that the lips 3a, 4a snap-fit on the base 2.

[0053] In this context, the term "snap-fit" is synonym of clip on fitting.

[0054] Preferably, the free end 13, 14 of each of the lips 3a, 4a is inwardly bent towards the corresponding cavity 31, 41.

[0055] More preferably, the free end 13, 14 of each the lips 3a, 4a has a triangular cross-section.

[0056] In practice, the two upper profiled elements 2, 3 can integrate a plastic slider or define its functionality inherently with their shapes.

[0057] According to a second embodiment, shown in figure 2, the base 2 further comprises a third upper projecting portion 24 which is separated from the first upper projecting portion 21 by a second groove 25.

[0058] In this embodiment, the sill 1 further comprises a third profiled element 5 extending mainly in the longitudinal direction and defining a third cavity 51.

[0059] The third profiled element 5 is joint-fitted on the base 2 in such a way that the third upper projecting portion 24 engages the third cavity 51.

[0060] According to an aspect of the invention, the third profiled element 5 has a third lip 5a penetrating into the second groove 25 thus defining a guide for the sliding of another leaf 100 of the elevator door.

[0061] Advantageously, the third lip 5a has a free end 15 with an enlarged cross-section which defines a recess counter-shaped to a free end 240 of the third upper projecting portion 24 so that the third lip 5a snap-fits on the base 2.

[0062] In the second embodiment, the base 2 comprises a first piece 2a and a second piece 2b that are joined together.

[0063] The first piece 2a is bent to create the second upper projecting portion 22 and the third upper projecting portion 24, whereas the second piece 2b is bent to create the first upper portion 21.

[0064] In particular, the second piece 2b is located within a cavity defined by the first piece 2a.

[0065] In particular, the first upper projecting portion 21 is interposed between the second upper projecting portion 22 ad the third upper projecting portion 24.

[0066] For example, the second piece 2b is welded to the first piece 2a.

[0067] The second embodiment is specifically meant for a telescopic elevator door since there are two grooves 23, 25 (or channels), each for a leaf of the door.

[0068] According to another embodiment, not shown, the base 2 can have further upper projecting portions, thus obtaining further grooves for further leaves of the door. Each projecting portion has its own profiled element applied by snap-fit.

[0069] Advantageously, the base 2 is made of one of following materials: plastic, steel, Carbon steel, aluminum.

[0070] The upper profiled elements 3, 4, 5 can also be made from a choice of one of the following materials: plastic, steel, Carbon steel, aluminum.

[0071] In one embodiment of the invention, each of upper profiled elements 3, 4, 5 consists of an extruded plastic body.

[0072] According to one example, a coating is applied on the base 2 and / or the upper profiled elements 3, 4, 5, when they are made of Carbon steel.

[0073] Indeed, galvanized pre or post coating is applied for providing corrosion resistance to Carbon steel.

[0074] With reference to the figure, number 200 indicates a door for an elevator, comprising the proposed sill 1. The door 200 can be a landing door or a car door.

[0075] The door 200 can comprise one door leaf 100 or a plurality of door leaves 100, for example in case of a telescopic arrangement.

[0076] The door 200 also comprises at least one sliding shoe 102 slidingly mounted in the grooves of the sill 1, for example in the first groove 23 in case of a single door leaf 100, so as to make the door leaf 100 slide along a prevailing direction.

[0077] The door 200 further comprises an anti-derailment device comprising at least one hook-like shaped element 103 which is partially inserted in the shoe 102 and penetrating within a hollow part of the base 2 of the sill 1 so as to engage it in response to a stress on the leaf 101 which tends to produce the derailment of the shoe 102.

[0078] The hook-like shaped element 103 is connected to the door leaf 100, preferably by means of fasteners 104.

[0079] According to a preferred embodiment, the hook-like shaped element 103 is obtained in a single piece and consists of a plate-like body bent and shaped so as to form a hook.

[0080] Preferably, the hook-like shaped element 103 is made of one of following materials: steel, Carbon steel, aluminum.

[0081] A coating may be applied on the hook-like shaped element 103 when it is made of Carbon steel.

[0082] Indeed, galvanized pre or post coating is applied for providing corrosion resistance to Carbon steel.

[0083] A process for manufacturing the hook-like shaped element 103 comprises the following steps: making a first 90° bending (indicated as 1A in figure 6) using a standard bending machine; making a second 90° bending (indicated as 1B in figure 6) following the first 90° bending; making a third 45° bending (indicated as 1C in figure 6) following the second 90° bending.

[0084] According to an embodiment of the invention, the landing door 200 further comprises a support plate 110 for mounting the operating mechanisms of said door. Even if it is known, for example by document EP 1176113 B1 to provide a single guide (also called here "monorail guide") in order to convey and guide a corresponding rapid carriage and slow carriage, in the proposed invention the monorail guide 111 has a specific new shape.

[0085] A process for manufacturing the monorail guide 111 comprises the following steps: making a first 90° bending (indicated as 1A in figure 8) using a standard bending machine; making a second 90° bending (indicated as 1B in figure 8) following the first 90° bending; making a third 90° bending (indicated as 1C in figure 8) following the second 90° bending; making a 180° open hemming (indicated as 1D in figure 8) at the open edge formed after the third 90° bending.

[0086] The characteristics of the sill for an elevator door according to the present invention emerge clearly from the above description, as do the advantages.

[0087] In particular, thanks to the simple design, the proposed sill can be assembled easily and quickly. In addition, the simple structural profile allows a quick and cheap maintenance.

[0088] Furthermore, the sill is lighter than known solutions.

[0089] The sill can also be used for a telescopic door by simply joining more pieces, placed one inside the others for creating further channels for the the leaves.

Examples

first embodiment

[0044] shown in figure 1, the base 2 is made of a single piece. In particular, the base 2 consists of a plate-like body bent and shaped so as to define the upper projecting portions 21, 22 and the first groove 23.

[0045]A process for manufacturing the base 2 starting from a plate-like body comprises the following steps:

making a first 90° bending (indicated as 1A in figure 2), for example using a standard bending machine; making a second 90° bending (indicated as 1A in figure 2), following the first 90° bending; making a third 90° bending (indicated as 1C in figure 2), following the second 90° bending; making a fourth 90° bending (indicated as 1C in figure 2), following the third 90° bending; making a fifth 90° bending (indicated as 1E in figure 2), following the fourth 90° bending; making a sixth 90° bending (indicated as 1F in figure 2) following the fifth 90° bending.

[0046]Preferably, the first upper projecting portion 21 and the second upper projecting portion 22 are identical ...

second embodiment

[0057] shown in figure 2, the base 2 further comprises a third upper projecting portion 24 which is separated from the first upper projecting portion 21 by a second groove 25.

[0058]In this embodiment, the sill 1 further comprises a third profiled element 5 extending mainly in the longitudinal direction and defining a third cavity 51.

[0059]The third profiled element 5 is joint-fitted on the base 2 in such a way that the third upper projecting portion 24 engages the third cavity 51.

[0060]According to an aspect of the invention, the third profiled element 5 has a third lip 5a penetrating into the second groove 25 thus defining a guide for the sliding of another leaf 100 of the elevator door.

[0061]Advantageously, the third lip 5a has a free end 15 with an enlarged cross-section which defines a recess counter-shaped to a free end 240 of the third upper projecting portion 24 so that the third lip 5a snap-fits on the base 2.

[0062]In the second embodiment, the base 2 comprises a first piece...

Claims

1. A sill (1) for an elevator door, comprising: - a base (2) extending mainly in a longitudinal direction and comprising a first upper projecting portion (21) and a second upper projecting portion (22) separated by a first groove (23) that is open in an upwards direction; - at least a first profiled element (3) extending mainly in said longitudinal direction and defining a first cavity (31), said first profiled element (3) being joint-fitted on the base (2) in such a way that the first upper projecting portion (21) engages the first cavity (31); - a second profiled element (4) extending mainly in said longitudinal direction and defining a second cavity (41), said second profiled element (4) being joint-fitted on the base (2) in such a way that the second upper projecting portion (22) engages the second cavity (41), said first profiled element (3) and said second profiled element (4) having respectively a first lip (3a) and a second lip (4a) penetrating into the first groove (23) thus defining a guide for the sliding of a leaf (100) of said elevator door, characterised by each of said lips (3a, 4a) having a free end (13, 14) with an enlarged cross-section which defines a recess counter-shaped to a free end (210, 220) of the corresponding upper projecting portions (21, 22) so that the lips (3a, 4a) snap-fit on the base (2).

2. The sill (1) according to claim 1, wherein the free end (13, 14) of each of said lips (3a, 4a) is inwardly bent towards the corresponding cavity (31, 41).

3. The sill (1) according to claim 2, wherein the free end (13, 14) of each of said lips (3a, 4a) has a triangular cross-section.

4. The sill (1) according to any one of the preceding claims, wherein the first profiled element (3) and the second profiled element (4) are applied to the base (2) specularly with respect to the first groove (23).

5. The sill (1) according to any one of the preceding claims, wherein said base (2) is made of a single piece and consists of a plate-like body bent and shaped so as to define the first upper projecting portion (21), the second upper projecting portion (22) and the first groove (23).

6. The sill (1) according to claim 5, wherein the first upper projecting element (21) and the second upper projecting element (22) are identical in shape and dimensions, the first profile element (3) and the second profiled element (4) being identical in shape and dimensions.

7. The sill (1) according to any one of claims 1 to 4, wherein said base (2) further comprises a third upper projecting portion (24) which is separated from the first upper projecting portion (21) by a second groove (25), said sill (1) further comprising a third profiled element (5) extending mainly in said longitudinal direction and defining a third cavity (51), said third profiled element (5) being joint-fitted on the base (2) in such a way that the third upper projecting portion (24) engages the third cavity (51), said third profiled element (5) having a third lip (5a) penetrating into the second groove (25) thus defining a guide for the sliding of another leaf (100) of said elevator door, said third lip (5a) having a free end (15) with an enlarged cross-section which defines a recess counter-shaped to a free end (240) of the third upper projecting portion (24) so that the third lip (5a) snap-fits on the base (2).

8. The sill (1) according to claim 7, wherein the base (2) comprises a first piece (2a) and a second piece (2b) that are joined together, said first piece (2a) being bent to create the second upper projecting portion (22) and the third upper projecting portion (24), said second piece (2b) being bent to create the first upper portion (21), the second piece (2b) being located within a cavity defined by the first piece (2a).

9. The sill (1) according to any one of the preceding claims, wherein the base (2) is made of one of following materials: plastic, steel, Carbon steel, aluminum, and each of said profiled elements (3, 4, 5) is made of one of the following materials: plastic, steel, Carbon Steel, aluminum.

10. A door (200) for an elevator, for example a landing door or a car door, comprising: - a sill (1) according to any one of the preceding claims; - at least one door leaf (100) sliding in said sill (1); - a sliding shoe (102) slidingly mounted in the first groove (23) of the sill (1) so as to make the door leaf (100) slide along a prevailing direction; - an anti-derailment device comprising at least one hook-like shaped element (103) which is partially inserted in the shoe (102) and penetrating within a hollow part of the base (2) of the sill (1), the hook-like shaped element (103) being connected to the door leaf (100).

11. The door (200) according to claim 10, further comprising fasteners (104) for attaching the hook-like shaped element (103) to the door leaf (100).

12. The door (200) according to claim 10 or 11, wherein the hook-like shaped element (103) is obtained in a single piece and consists of a plate-like body bent and shaped so as to form a hook.

13. The door (200) according to any one of claims 10 to 12, wherein the hook-like shaped element (103) is made of one of following materials: steel, Carbon steel, aluminum.

14. The door (200) according to any one of the claims 10 to 13, further comprising a support plate (110) defining a monorail guide (111) in order to convey and guide a corresponding rapid carriage and slow carriage.

15. The door (200) according to claim 14, wherein said monorail guide (111) is obtained by a plate-like body which is subject in the order to: - a first 90° bending; - a second 90° bending following said first 90° bending; - a third 90° bending following said second 90° bending; - a 180° open hemming at an open edge formed after the third 90° bending.

Images