Threshold for elevator door

Abstract

A sill (1) for an elevator door, comprising:-a base (2) extending predominantly in a longitudinal direction and comprising a first upper protruding portion (21) and a second upper protruding portion (22) separated by a first groove (23), the first groove (23) being open in an upward direction; -at least one first profile element (3) which is coupled to the first upper projection (21); -a second profile element (4) which is mounted on the second upper projection (22) in a coupled manner; the first profile element (3) and the second profile element (4) have a first lip (3a) and a second lip (4a), respectively, which penetrate into the first grooves (23) so as to define a guide for sliding of the door leaf (100) of the elevator door, each lip (3a, 4a) having a free end (13, 14) with an enlarged cross-section defining a groove opposite the free end of the corresponding upper projection, and the lip edge is buckled and matched on the base.

Description

Technical Field

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

[0002] The sill can be used in combination with sliding doors having a central opening of the door leaf or having side telescopic openings, having straight and curved sliding door leaves, having door leaves with mechanisms located in the upper region of the door leaf, and having door leaves with mechanisms positioned at the bottom. Background Art

[0003] The landing doors of elevators usually have skids at the bottom, which slide in grooves formed in the sill and have the purpose of holding the door leaf inside the guides during the opening and closing movements that occur when the car is at the landing door.

[0004] However, stress, impact, and pushing on the door from the outside can cause the skids to derail from their sliding grooves, thus releasing the door from the lower restraint and dangerously allowing the door to provide free access to the elevator or the elevator shaft without the car being present.

[0005] To avoid this possibility, in the past, manufacturers of doors for elevators have sought to produce very strong and heavy doors in order to withstand high stress. However, this has led to a rather high cost for said doors in order for them to meet the necessary resistance and safety requirements.

[0006] To overcome these drawbacks, the applicant has developed a derailment prevention device, as described in document WO 2011 / 042925A2, which includes an element associated with the skid or with the door leaf, which is shaped like a hook in order to hook onto at least one corresponding curved edge-like hook shape of the groove, thus defining an interference between the end portion of the end and the end portion of the edge of the groove in response to stress on the door leaf, which stress tends to cause derailment of the skid.

[0007] For sills, many designs have been developed, and document EP 0803463 proposes a sill for a landing, which includes:

[0008] - A steel lower profile element, which is appropriately formed with corrugations to define at least one groove for the sliding of a door leaf provided with sliders or rollers;

[0009] - An aluminum upper profile element, which has a reverse shape with respect to the lower profile element and is assembled and joined to the lower profile element.

[0010] The choice of the material of the profile elements, steel for the lower core and aluminum for the top cover, although an improvement with respect to previous solutions in terms of weight and cost, still has its drawbacks.

[0011] For example, the sliders have plastic parts that are prone to wear, so they need to be replaced regularly.

[0012] Since the sliders are fixed to the door leaf, the maintenance time is long and the cost is high.

[0013] Since it is necessary to produce plates or metal profiles with many bends in different materials, the components of the threshold of EP 0803463 also require high production costs.

[0014] In the patent EP 3747819 in the name of the present applicant, a threshold is disclosed which has an edge or projection of a lower profile element that tapers the groove, and an inner lip of an upper profile element that integrates or "simulates" a wear-resistant part of the slider, thereby reducing the width of the groove. Reducing the groove has the following advantages: restricting or completely avoiding tripping, problems with the entry and exit of wheelchairs or walkers equipped with wheels, stretchers, and the accidental dropping of small objects, etc.

[0015] In fact, the production of traditional thresholds results in high production costs because plates or metal profiles with many bends must be manufactured in different materials.

[0016] There is still a need to further improve the reliability of the threshold while also reducing complexity, maintenance time, and cost.

[0017] Herein, the technical task based on the present invention is to propose a threshold for an elevator door that overcomes the disadvantages of the above-mentioned prior art.

[0018] In particular, the object of the present invention is to provide a threshold for an elevator door that is easier, faster, and cheaper to manufacture compared to prior art solutions.

[0019] Another object of the present invention is to provide a threshold for an elevator door that exhibits lower structural complexity than prior art solutions, and thus also achieves lower maintenance time and cost.

[0020] Another object of the present invention is to provide a threshold for an elevator door that has higher reliability than prior art solutions, particularly restricting or completely avoiding: tripping, problems with the entry and exit of wheelchairs or walkers equipped with wheels, stretchers, and the accidental dropping of small objects, etc. Summary of the Invention

[0021] The stated technical task and the specified objects are essentially achieved by a threshold for an elevator door, which comprises:

[0022] - A base that mainly extends in the longitudinal direction and includes a first upper protruding part and a second upper protruding part separated by a first groove, the first groove opening in the upward direction;

[0023] - At least one first profile element, which mainly extends in the longitudinal direction and defines a first cavity, and the first profile element is coupled and assembled on the base in such a way that a first upper protruding portion engages the first cavity;

[0024] - A second profile element, which mainly extends in the longitudinal direction and defines a second cavity, and the second profile element is coupled and assembled on the base in such a way that a second upper protruding portion engages the second cavity.

[0025] The first profile element and the second profile element respectively have a first lip and a second lip, and the first lip and the second lip penetrate into a first groove, thereby defining a guide for the sliding of the door leaf of the elevator door.

[0026] Each of the lips has a free end with an enlarged cross-section, and the enlarged cross-section defines a recess corresponding to the free end of the corresponding upper protruding portion, so that the lip snap-fits on the base.

[0027] According to one aspect of the present invention, the free end of each of the lips is bent inwardly towards the corresponding cavity.

[0028] In one embodiment of the present invention, the free end of each of the lips has a triangular cross-section.

[0029] According to one aspect of the present invention, the first profile element and the second profile element are applied to the base mirror-symmetrically with respect to the first groove.

[0030] According to one embodiment of the present invention, the base is made of a single piece and consists of a plate-like body, and the plate-like body is bent and shaped to define a first upper protruding portion, a second upper protruding portion and a first groove.

[0031] In one example, the first upper protruding element and the second upper protruding element have the same shape and size, and the first profile element and the second profile element have the same shape and size.

[0032] According to another embodiment of the present invention, the base further includes a third upper protruding portion, and the third upper protruding portion is separated from the first upper protruding portion by a second groove.

[0033] The sill further includes a third profile element, which mainly extends in the longitudinal direction and defines a third cavity. The third profile element is coupled and assembled on the base in such a way that a third upper protruding portion engages the third cavity.

[0034] The third profile element also has a third lip, and the third lip penetrates into the second groove, thereby defining a guide for the sliding of another door leaf of the elevator door. The third lip has a free end with an enlarged cross-section, and the enlarged cross-section defines a recess with a shape opposite to that of the free end of the third upper protruding portion, so that the third lip snap-fits on the base.

[0035] According to one aspect of the invention, the base includes a first piece and a second piece joined together. The first piece is bent to form a second upper protruding portion and a third upper protruding portion. The second piece is bent to form a first upper portion. The second piece is located within a cavity defined by the first piece.

[0036] For example, the base is made of one of the following materials: plastic, steel, carbon steel, aluminum, and each of the profile elements is made of one of the following materials: plastic, steel, carbon steel, aluminum.

[0037] The stated technical tasks and the specified objectives are substantially achieved by a door for an elevator (such as a landing door or a car door), which includes:

[0038] - A sill according to the invention;

[0039] - At least one door leaf that slides within the sill;

[0040] - A sliding shoe that is slidably mounted in a first groove of the sill (1) so that the door leaf slides along a main direction;

[0041] - A derailment prevention device that includes at least one hook-shaped element that is partially inserted into the sliding shoe and penetrates into a hollow portion of the base of the sill.

[0042] The hook-shaped element is connected to the door leaf.

[0043] Preferably, the door includes a fastener for attaching the hook-shaped element to the door leaf.

[0044] According to one embodiment, the hook-shaped element is obtained in one piece and consists of a plate-shaped body that is bent and shaped to form a hook.

[0045] For example, the hook-shaped element is made of one of the following materials: steel, carbon steel, aluminum.

[0046] According to one aspect of the invention, the door further includes a support plate that defines a single-rail guide for conveying and guiding a corresponding fast trolley and a slow trolley.

[0047] In one embodiment, the single-rail guide is obtained from a plate-shaped body that undergoes:

[0048] - A first 90° bend;

[0049] - A second 90° bend after the first 90° bend;

[0050] - A third 90° bend after the second 90° bend;

[0051] - A 180° opening hem at the opening edge formed after the third 90° bend. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Other features and advantages of the present invention will become more fully apparent from the following non - limiting description of preferred but not exclusive embodiments of a sill for an elevator door and a door including said sill, as shown in the drawings, in which:

[0053] - Figure 1 Shows a cross - section of a sill for an elevator door according to a first embodiment of the present invention;

[0054] - Figure 2 Shows Figure 1 the sill of [], in which, the bends for obtaining the sill base are shown;

[0055] - Figure 3 Shows a cross - section of a sill for an elevator door according to a second embodiment of the present invention;

[0056] - Figure 4 Shows a front view of a landing door according to the present invention;

[0057] - Figure 5 Shows in cross - section Figure 4 the sill and derailment prevention device of the landing door of [];

[0058] - Figure 6 Shows in cross - section Figure 4 the hook - like shaped element of the landing door of [];

[0059] - Figure 7 Shows in cross - section Figure 4 the support plate of the landing door of [];

[0060] - Figure 8 Shows in cross - section Figure 7 the single - rail guide of the support plate of []; DETAILED DESCRIPTION

[0061] Referring to the drawings, reference numeral 1 denotes a sill for a door 200 (i.e., a landing door or a car door) of an elevator.

[0062] The sill 1 at least comprises:

[0063] - A base 2, which mainly extends in the longitudinal direction;

[0064] - A first upper profile element 3 and a second upper profile element 4, which mainly extend in the same longitudinal direction.

[0065] The base 2 includes at least a first upper protruding portion 21 and a second upper protruding portion 22 separated by a first groove 23, the first groove 23 opening in an upward direction for the sliding of the door leaf 100 of the landing door (as will be better understood hereinafter).

[0066] Herein, the first groove 23 is also referred to as the "first channel", and the door leaf 100 is also referred to as the "door leaf".

[0067] According to Figure 1 the first embodiment shown, the base 2 is made of a single piece. In particular, the base 2 consists of a plate-shaped body which is bent and shaped to define the upper protruding portions 21, 22 and the first groove 23.

[0068] The method of manufacturing the base 2 starting from the plate-shaped body includes the following steps:

[0069] - A first 90° bend (represented as 1A in Figure 2 ) is made, for example using a standard bending machine;

[0070] - A second 90° bend (represented as 1A in Figure 2 ) is made after the first 90° bend;

[0071] - A third 90° bend (represented as 1C in Figure 2 ) is made after the second 90° bend;

[0072] - A fourth 90° bend (represented as 1C in Figure 2 ) is made after the third 90° bend;

[0073] - A fifth 90° bend (represented as 1E in Figure 2 ) is made after the fourth 90° bend;

[0074] - A sixth 90° bend (represented as 1F in Figure 2 ) is made after the fifth 90° bend.

[0075] Preferably, the first upper protruding portion 21 and the second upper protruding portion 22 have the same shape and size.

[0076] Therefore, the first profile element 3 and the second profile element 4 also preferably have the same shape and size, and they are applied to the base 2 mirror-symmetrically with respect to the first groove 23 respectively.

[0077] In particular, the first profile element 3 defines a first cavity 31 and is coupled and assembled on the base 2 in such a way that the first upper protruding portion 21 engages the first cavity 31.

[0078] The second profile element 4 defines a second cavity 41 and is coupled and assembled on the base 2 in such a way that a second upper protruding portion 22 engages the second cavity 41.

[0079] The first profile element 3 and the second profile element 4 partially penetrate into a first groove 23 of the base 2, thereby defining a guide for the sliding of the door leaf 100.

[0080] In particular, the first profile element 3 and the second profile element 4 respectively have a first lip 3a and a second lip 4a, and the first lip 3a and the second lip 4a penetrate into the first groove 23, thereby defining the guide for the sliding of the door leaf 100.

[0081] Advantageously, each of the lips 3a, 4a has a free end 13, 14 with an enlarged cross-section, and the enlarged cross-section defines a recess opposite to the free ends 210, 220 of the corresponding upper protruding portions 21, 22, so that the lips 3a, 4a are snap-fitted on the base 2.

[0082] In this context, the term "snap-fitted" is a synonym for clip on fitting.

[0083] Preferably, the free ends 13, 14 of each of the lips 3a, 4a are bent inwardly towards the corresponding cavities 31, 41.

[0084] More preferably, the free ends 13, 14 of each of the lips 3a, 4a have a triangular cross-section.

[0085] In practice, the two upper profile elements 2, 3 can integrate plastic sliders or inherently define their functional points with their shapes.

[0086] According to a second embodiment, as Figure 2 shown, the base 2 further includes a third upper protruding portion 24, which is separated from the first upper protruding portion 21 by a second groove 25.

[0087] In this embodiment, the threshold 1 further includes a third profile element 5, and the third profile element 5 mainly extends in the longitudinal direction and defines a third cavity 51.

[0088] The third profile element 5 is coupled and assembled on the base 2 in such a way that a third upper protruding portion 24 engages the third cavity 51.

[0089] According to one aspect of the present invention, the third profile element 5 has a third lip 5a, and the third lip 5a penetrates into the second groove 25, thereby defining a guide for the sliding of the other door leaf 100 of the elevator door.

[0090] Advantageously, the third lip 5a has a free end 15 with an enlarged cross-section that defines a recess opposite in shape to the free end 240 of the third upper projecting part 24, such that the third lip 5a snap-fits onto the base 2.

[0091] In a second embodiment, the base 2 comprises a first piece 2a and a second piece 2b joined together.

[0092] The first piece 2a is bent to form a second upper projecting part 22 and a third upper projecting part 24, while the second piece 2b is bent to form a first upper part 21.

[0093] In particular, the second piece 2b is located within the cavity defined by the first piece 2a.

[0094] In particular, the first upper projecting part 21 is interposed between the second upper projecting part 22 and the third upper projecting part 24.

[0095] For example, the second piece 2b is welded to the first piece 2a.

[0096] The second embodiment is specifically for a telescopic elevator door, as there are two grooves 23, 25 (or channels), each for one leaf of the door.

[0097] According to another embodiment, not shown, the base 2 may have additional upper projecting parts, thereby obtaining additional grooves for additional leaves of the door. Each projecting part has its own profile element applied by snap-fitting.

[0098] Advantageously, the base 2 is made of one of the following materials: plastic, steel, carbon steel, aluminium.

[0099] The upper profile elements 3, 4, 5 may also be selected from one of the following materials: plastic, steel, carbon steel, aluminium.

[0100] In an embodiment of the invention, each of the upper profile elements 3, 4, 5 consists of an extruded plastic body.

[0101] According to an example, when the upper profile elements 3, 4, 5 are made of carbon steel, a coating is applied to the base 2 and / or the upper profile elements 3, 4, 5.

[0102] In fact, a pre-coated or post-coated galvanization is applied to provide corrosion resistance to the carbon steel.

[0103] Referring to the accompanying drawings, the reference numeral 200 denotes a door for an elevator including the proposed threshold 1. The door 200 may be a landing door or a car door.

[0104] The door 200 may include one leaf 100 or multiple leaves 100 (for example, in the case of a telescopic device).

[0105] The door 200 further includes at least one sliding tile 102 slidably mounted in a groove of the sill 1, for example, mounted in the first groove 23 in the case of a single door leaf 100, so as to slide the door leaf 100 along the dominant direction.

[0106] The door 200 further includes a derailment prevention device, which includes at least one hook-shaped element 103. The hook-shaped element 103 is partially inserted into the sliding tile 102 and penetrates into the hollow part of the base 2 of the sill 1, so as to engage the hollow part in response to the stress on the door leaf 101. This stress tends to cause the derailment of the sliding tile 102.

[0107] The hook-shaped element 103 is preferably connected to the door leaf 100 by means of a fastener 104.

[0108] According to a preferred embodiment, the hook-shaped element 103 is obtained in one piece and is composed of a plate-shaped body, which is bent and formed to form a hook.

[0109] Preferably, the hook-shaped element 103 is made of one of the following materials: steel, carbon steel, aluminum.

[0110] When the hook-shaped element 103 is made of carbon steel, a coating can be applied to the hook-shaped element.

[0111] In fact, a pre-coated or post-coated galvanized coating is applied to provide corrosion resistance to the carbon steel.

[0112] The method for manufacturing the hook-shaped element 103 includes the following steps:

[0113] - Performing a first 90° bend (denoted as 1A in Figure 6 ) using a standard bending machine;

[0114] - Performing a second 90° bend (denoted as 1B in Figure 6 ) after the first 90° bend;

[0115] - Performing a third 45° bend (denoted as 1C in Figure 6 ) after the second 90° bend.

[0116] According to an embodiment of the present invention, the landing door 200 further includes a support plate 110 for installing the operating mechanism of the door. Although it is known, for example, from document EP1176113A1, to provide a single guide (also referred to here as a "single-rail guide") for transmitting and guiding a corresponding fast trolley and a slow trolley, in the proposed invention, the single-rail guide 111 has a specific new shape.

[0117] A method for manufacturing the single-rail guide 111 includes the following steps:

[0118] - Perform the first 90° bend (designated as 1A in Figure 8 ) using a standard bending machine;

[0119] - Perform the second 90° bend (designated as 1B in Figure 8 ) after the first 90° bend;

[0120] - Perform the third 90° bend (designated as 1C in Figure 8 ) after the second 90° bend;

[0121] - Perform a 180° opening hem at the opening edge formed after the third 90° bend (designated as 1D in Figure 8 ).

[0122] The features and advantages of the threshold for an elevator door according to the present invention are clearly apparent from the above description.

[0123] In particular, due to the simple design, the proposed threshold can be assembled easily and quickly. In addition, the simple structural profile allows for quick and inexpensive maintenance.

[0124] Furthermore, the threshold is lighter than known solutions.

[0125] The threshold can also be used for telescopic doors by simply combining more pieces, placing one piece inside another, to create more passageways for the door leaves.

Claims

1. A sill (1) for an elevator door, comprising: - A base (2), the base (2) extending mainly in a longitudinal direction and including a first upper protruding portion (21) and a second upper protruding portion (22) separated by a first groove (23), the first groove (23) opening in an upward direction; - At least a first profile element (3), the at least first profile element (3) extending mainly in the longitudinal direction and defining a first cavity (31), the first profile element (3) being coupled and assembled on the base (2) in such a way that the first upper protruding portion (21) engages the first cavity (31); - A second profile element (4), the second profile element (4) extending mainly in the longitudinal direction and defining a second cavity (41), the second profile element (4) being coupled and assembled on the base (2) in such a way that the second upper protruding portion (22) engages the second cavity (41), The first profile element (3) and the second profile element (4) respectively have a first lip (3a) and a second lip (4a), the first lip (3a) and the second lip (4a) penetrate into the first groove (23), thereby defining a guide for the sliding of the door leaf (100) of the elevator door, each of the lips (3a, 4a) having a free end (13, 14) with an enlarged cross-section, the enlarged cross-section defining a recess opposite to the free ends (210, 220) of the corresponding upper protruding portions (21, 22), such that the lips (3a, 4a) snap onto the base (2).

2. The sill (1) according to claim 1, wherein, The free ends (13, 14) of each of the lips (3a, 4a) are bent inwards towards the corresponding cavities (31, 41).

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

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

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

6. The sill (1) according to claim 5, wherein, The first upper protruding element (21) and the second upper protruding element (22) have the same shape and size, and the first profile element (3) and the second profile element (4) have the same shape and size.

7. The sill (1) according to any one of claims 1 to 4, wherein, The base (2) further includes a third upper protruding portion (24), which is separated from the first upper protruding portion (21) by a second groove (25). The sill (1) further includes a third profile element (5), which mainly extends in the longitudinal direction and defines a third cavity (51). The third profile element (5) is coupled and assembled on the base (2) in such a way that the third upper protruding portion (24) engages the third cavity (51). The third profile element (5) has a third lip (5a), which penetrates into the second groove (25), thereby defining a guide for the sliding of the other door leaf (100) of the elevator door. The third lip (5a) has a free end (15) with an enlarged cross-section, and the enlarged cross-section defines a recess with a shape opposite to that of the free end (240) of the third upper protruding portion (24), so that the third lip (5a) is snap-fitted on the base (2).

8. The sill (1) according to claim 7, wherein, the base (2) includes a first piece (2a) and a second piece (2b) joined together. The first piece (2a) is bent to form the second upper protruding portion (22) and the third upper protruding portion (24), and the second piece (2b) is bent to form the first upper portion (21). The second piece (2b) is located within the 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 the following materials: plastic, steel, carbon steel, aluminum, and each of the profile elements (3, 4, 5) is made of one of the following materials: plastic, steel, carbon steel, aluminum.

10. A door (200) for an elevator, such as a landing door or a car door, comprising: - the sill (1) according to any one of the preceding claims; - at least one door leaf (100), which slides in the sill (1); - a sliding shoe (102), which is slidably mounted in the first groove (23) of the sill (1) so that the door leaf (100) slides along the main direction; - a derailment prevention device, which includes at least one hook-shaped element (103). The hook-shaped element (103) is partially inserted into the sliding shoe (102) and penetrates into the hollow part of the base (2) of the sill (1), and the hook-shaped element (103) is connected to the door leaf (100).

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

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

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

14. The door (200) according to any one of claims 10 to 13, further comprising a support plate (110) defining a single-rail guide (111) for conveying and guiding corresponding fast and slow trolleys.

15. The door (200) according to claim 14, wherein, the single-rail guide (111) is obtained from a plate-shaped body which is subjected to the following operations in sequence: - a first 90° bend; - a second 90° bend after the first 90° bend; - a third 90° bend after the second 90° bend; - a 180° opening hem at the opening edge formed after the third 90° bend.

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