Sheet metal substrate used in elevator

Abstract

A sheet metal substrate (1) for use in elevators, comprising: a single body (2) extending from a top side (2a) to a bottom side (2b) and from a left side (2c) to a right side (2d), in which the edges (3) of the top side (2a) and the bottom side (2b) and the edges (3) of the left side (2c) and the right side (2d), as reinforcement, are bent backwards and inwards so as to define, for each side, an inner recess (4) extending along the corresponding side (2a, 2b, 2c, 2d); at least one reinforcement (10) of a first type extending longitudinally and attached to an intermediate region of the rear side (2f) of the body (2); at least two reinforcements (20) of a second type, which extend longitudinally and are arranged at least partially in the inner recesses (4) of the left side (2c) and the right side (2d), respectively; at least one reinforcement (30) of a third type, which is formed transversely and is arranged at least partially in the inner recess (4) of the top side (2a).

Description

Technical Field

[0001] The present invention relates to a metal sheet substrate used in an elevator. Generally, the present invention belongs to the field of elevators. Specifically, it belongs to the field of the structure of elevator doors and carriages. More specifically, it relates to the field of metal sheet substrates used in elevator doors and carriages. Background Art

[0002] In the elevator industry, substrates made of metal sheets are usually used in landing doors, car doors, and the car itself.

[0003] Conventionally, elevator doors (landing doors and car doors) are composed of the following components - a bottom header, a top header, a substrate, and a reinforcing member. The substrate is always made of a metal sheet with a uniform thickness. The thickness of the metal sheet is determined by the strength required at the weakest point of the panel during standard mechanical tests. Therefore, the default thickness at the weakest point of the thin sheet becomes the thickness of the entire panel. Usually, such elevator doors or car panels have a substrate thickness of 0.8 mm or more. An elevator car, also known as a car, is composed of a sturdy and durable steel frame and consists of a ceiling, a platform, and a substrate. The sides of the elevator car are usually also made of steel plates and are decorated with panels inside. In an elevator car, the substrate connects the ceiling and the platform.

[0004] Chinese Patent Application CN201811591042A discloses an integral elevator door panel structure. Among them, left and right flanges are respectively provided at the left and right ends of the panel body. Upper and lower flanges are respectively provided at the upper and lower ends of the panel. A curled edge is provided on the inner side wall of the hem, a connecting member is provided inside the curled edge, and a guide shoe is provided below the lower hem at the bottom of the connecting member; there is an installation cavity, and the installation cavity is provided with a reinforcing rib fixed on the plate surface. The patent document claims that such a panel structure has the characteristics of being able to effectively improve production efficiency and the overall strength of the door panel.

[0005] Chinese Patent Application CN201620607387U discloses a one-piece curved elevator door, including a door panel main body, an upper head, a lower head, and door sliders installed on the lower head. In the main body of the elevator door, the sides (left and right) are curved into an inwardly turned U shape to form a wrapping structure. The inverted U-shaped part of the door panel main body is curved to form the upper head, and the lower side is formed in a stepped inverted shape to form the lower head, and the stepped part includes at least one vertical surface, wherein the door sliders are installed on the vertical surface. The stepped shape described in this example is a secondary stepshape, including a first step directly connected to the door panel main body and a second step connected to the end of the first step, and the door sliders are installed on the vertical plane of the first step. The patent document discloses that the door is made by one-piece molding, thus reducing the production process of the door, making the process simple and easy to implement, and also reducing the cost of the elevator car door.

[0006] Chinese Patent Application CN201520720563U discloses an elevator door with a new integral structure, including a main door having a door main body, the door main body including sides folded on the left and right, an upper hem, and a lower hem, wherein the lower hem is provided with mounting holes for installing door sliders, and the lower hem is also folded in accordance with the edge direction through a first bending edge and a second bending edge and bends on the third and fourth sides, thereby forming four stepped side edges, wherein the lower end of the vertical flange of the rim includes a lower hem with a vertical mounting plate, wherein the vertical mounting plate is bent by the first side edge, and the bent second side edge is bent twice in an L shape, and the vertical position corresponds to the lower hem of the mounting plate. The mounting holes are located in the vertical mounting plate, wherein the first folding edge and the second folding edge between the first folding edge and the third folding edge, a groove is formed for installing sliders between the fourth bent edges. The novel features are proposed, especially the feature that the lower hem with four bends leads directly to the lower part of the elevator door device, to not only reduce the manufacturing process of the door device, but also ensure the rigidity of the door device, and it is claimed that the installation of the door sliders is convenient.

[0007] However, the above inventions do not fully solve the problems in the prior art. In particular, they do not provide an effective mechanism to reduce the thickness requirements of the metal sheet substrates used in elevator landing doors, car doors, and the car itself without compromising the structural integrity of the substrates. The patents disclosed in the prior art literature are also not convenient for installation because the holes for fixing the substrates are asymmetric. Therefore, there is a need in the art to provide a metal sheet substrate for use in elevators, which is structurally simpler but still capable of passing all integrity and tolerance tests for commercialization in the market.

[0008] The information disclosed in the background section is only used to enhance the general background understanding of the present invention and should not be regarded as an admission or any form of suggestion that this information forms the prior art known to those skilled in the art.

[0009] Furthermore, it is obvious to those skilled in the art that the object of the present invention has been achieved by providing a metal sheet substrate for use in an elevator, which is essentially unique and different from the existing systems or the systems described in the above prior art in the fields known to the inventor. Various changes can be made within the concept of the present invention and without departing from the concept of the present invention. Additional features of the present invention that form the subject matter of the claims of the present invention will be described below. Those skilled in the art should understand that they can easily use the disclosed concept and specific embodiments as a basis for designing and modifying other methods and structures for achieving the same object of the present invention. In addition, the features of some stages disclosed in this application can be used together with the features of other stages. Therefore, the scope of the present invention will be determined by the terms of the appended claims and their legal equivalents. Summary of the Invention

[0010] In this document, the technical task of the present invention is to propose a metal sheet substrate for use in an elevator, which overcomes the disadvantages of the above prior art.

[0011] In particular, the object of the present invention is to provide a metal sheet substrate for use in an elevator, which is simpler than the prior art solutions but still capable of meeting the strength and resistance requirements for the use safety of elevator doors.

[0012] The above technical task and specific object are basically achieved by a metal sheet substrate for use in an elevator, which includes a single body that extends from the top side to the bottom side in the longitudinal direction and from the left side to the right side in the transverse direction. The single body has a front side and a rear side. Among them, as reinforcement, the edges of both the top side and the bottom side and the edges of both the left side and the right side are bent backward and inward to define a concave portion extending along the corresponding side for each side.

[0013] The metal sheet substrate includes:

[0014] At least one first type of reinforcement member that extends in a direction substantially parallel to the longitudinal direction and is attached to the middle region of the rear side of the body;

[0015] At least two second type of reinforcement members that extend in a direction substantially parallel to the longitudinal direction, and the second type of reinforcement members are at least partially arranged in the concave portions on the left side and the right side respectively;

[0016] At least one reinforcing member of a third type, the at least one reinforcing member of the third type extending in a direction substantially parallel to the transverse direction, and the reinforcing member (30) of the third type being at least partially disposed in the concave portion of the top side.

[0017] According to one embodiment, the edge of the bottom side includes a hem to define an overlapping portion for reinforcement.

[0018] Preferably, the edge of the bottom side includes a first 90° bend, followed by a second 90° bend forming an open edge, and the open edge has a 180° hem to define the overlapping portion.

[0019] According to one embodiment, the edges of these sides include a rearward portion and an inward portion, the rearward portion originating from the body and extending away from the body on the rear side, and the inward portion originating from the rearward portion and extending along the rear side at a distance from the rear side.

[0020] Preferably, the overlapping portion extends over the entirety of the inward portion and at least a part of the rearward portion.

[0021] According to one embodiment, the reinforcing member of the first type includes two contact portions, the two contact portions being attached to the rear side and interspersed by protruding portions.

[0022] Preferably, the protruding portion has a trapezoid-like cross-section.

[0023] According to one embodiment, the reinforcing member of the second type is shaped and arranged to abut against both the corresponding side of the body and the curved edge of the rear side.

[0024] According to one embodiment, the reinforcing member of the second type is shaped and arranged to cover the concave portion of the corresponding left or right side.

[0025] Preferably, the reinforcing member of the second type has a cross-section extending in a shape of an open broken line similar to a rectangle.

[0026] Preferably, the reinforcing member of the second type is given a first 90° bend, followed by a second 90° bend, and then a third 90° bend forming an open edge, and the open edge is then hemmed by 180°.

[0027] Preferably, the thickness of the at least one reinforcing member of the third type is greater than the thickness of the body.

[0028] Preferably, the reinforcing member of the third type has a U-shaped cross-section.

[0029] According to one embodiment, the reinforcing member of the third type is completely enclosed in the concave portion of the top side. Description of the Drawings

[0030] The additional features and advantages of the present invention will become more apparent from the non - restrictive description of the preferred but non - exclusive embodiments of the metal sheet substrate used in an elevator, as shown in the accompanying drawings, in which:

[0031] Figure 1a and Figure 1b show, respectively, in a front view and a side view, the metal sheet substrate used in an elevator according to the present invention;

[0032] Figure 2 shows Figure 1a a cross - section of the metal sheet substrate;

[0033] Figure 3 shows an embodiment of a second type of reinforcement;

[0034] Figure 4 shows an embodiment of a third type of reinforcement, which is arranged on the inner side of the top side of Figure 1a the metal sheet substrate;

[0035] Figure 5 shows Figure 1a a side view of the top side and the bottom side of the metal sheet substrate; Detailed Description of the Invention

[0036] Referring to the accompanying drawings, reference numeral 1 denotes a metal sheet substrate for use in an elevator. In particular, the substrate 1 is the core part of a door leaf of an elevator door (e.g., a car door).

[0037] The substrate 1 comprises a single body 2. The body 2 extends from a top side 2a to a bottom side 2b in a longitudinal direction and from a left side 2c to a right side 2d in a transverse direction. In other words, the body 2 is substantially planar, that is, two - dimensional. The third dimension (commonly referred to as thickness) is negligible with respect to the other two dimensions.

[0038] The body has a front side 2e and a rear side 2f.

[0039] In particular, the bottom side 2b is preferably provided with a pair of holes that are symmetric with respect to each other, which cooperate with brackets and guide shoes fixed to the body at the pair of holes to form a bottom head.

[0040] The edges 3 of both the top side 2a and the bottom side 2b and the edges 3 of both the left side 2c and the right side 2d are bent backward and inward so as to define, for each side, a recess 4 extending along the corresponding side 2a, 2b, 2c, 2d. In particular, the bending serves as reinforcement.

[0041] In particular, these side edges 3 include a rearward portion 3a that originates from the body 2 and extends away from the body 2 on the rear side 2f. The edge 3 also includes an inward portion 3b that starts from the rearward portion 3 and extends along the rear side 2f at a distance from the rear side 2f. In other words, the edge 3 includes an inverted U-shape.

[0042] In this case, the recess 4 is the space between the body 2, the rearward portion 3a, and the inward portion 3b. The recess 4 opens on one side (the side facing the inner side of the body 2).

[0043] According to the illustrated embodiment, the edge 3 is given a first 90° bend, followed by a second 90° bend that forms an open edge.

[0044] Preferably, the edge 3 of the bottom side 2b includes a 180° hem to define an overlapping portion for reinforcement.

[0045] According to Figure 5 the illustrated preferred embodiment, the edge 3 of the bottom side 2b includes a first 90° bend 3', followed by a second 90° bend 3'' that forms an open edge. The open edge has a 180° hem 3''' to define an overlapping portion.

[0046] Note that the bends and hems we mention in the application are "sequential" as they follow one another in order or position.

[0047] In operation, the bottom edge 3 is formed by the following procedural steps:

[0048] Perform a first 180° hem (3''');

[0049] Perform a second 90° bend (3'') after the first 180° hem (3''');

[0050] Perform a third 90° bend (3') after the second 90° bend (3'').

[0051] In particular, there is an overlap for the entire inward portion 3b and at least a part of the rearward portion 3a.

[0052] More preferably, the substrate 1 is manufactured as follows:

[0053] a) Bend the bottom edge (3) with these procedural steps:

[0054] Perform a first 180° hem (3''');

[0055] Perform a second 90° bend (3'') after the first 180° hem (3''');

[0056] Perform a third 90° bend (3') after the second 90° bend (3”).

[0057] b) Bend the top edge (3) with these program steps:

[0058] Perform a fourth 90° bend (3””) after the third 90° bend (3”').

[0059] Perform a fifth 90° bend (3””') after the fourth 90° bend (3””).

[0060] The substrate 1 includes at least one reinforcing member 10 of the first type. The reinforcing member 10 of the first type extends in a direction substantially parallel to the longitudinal direction (the vertical direction in the mounted state of the substrate 1). The reinforcing member 10 of the first type is attached to the middle region of the rear side 2f of the main body 2.

[0061] Preferably, the reinforcing member 10 of the first type includes two contact portions 11 attached to the rear side 2f. The two contact portions 11 are separated by a protruding portion 12. In other words, the protruding portion 12 connects the two contact portions 11.

[0062] The protruding portion 12 starting from the contact portion 11 extends away from the rear side 2f.

[0063] According to Figure 2 the preferred embodiment shown, the protruding portion 12 has a trapezoid-like cross-section. Preferably, the protruding portion 12 does not protrude beyond the imaginary planar surface defined by the curved edges 3 of the left side 2c and the right side 2d.

[0064] The substrate 1 includes at least two reinforcing members 20 of the second type. The reinforcing members 20 of the second type extend in a direction substantially parallel to the longitudinal direction (the vertical direction in the mounted state of the substrate 1). The reinforcing members 20 of the second type are respectively at least partially arranged in the recesses 4 of the left side 2c and the right side 2d.

[0065] Preferably, the reinforcing members 20 of the second type are shaped and arranged so as to abut against both the curved edges 3 of the corresponding sides 2c, 2d and the rear side 2f of the main body 2. In particular, the reinforcing members 20 of the second type abut against the inward portions 3b of the corresponding sides 2c, 2d.

[0066] Here, “abut” means that an element contacts and leans against another element.

[0067] Preferably, the reinforcing members 20 of the second type have a cross-section extending in a shape of an open broken line similar to a rectangle.

[0068] According to Figure 3In the preferred embodiment shown, the second type of reinforcement 20 is given a first 90° bend 20a, followed by a second 90° bend 20b, and then a third 90° bend 20c forming an opening edge, which is then hemmed 180° at 20d.

[0069] Thus, the first opening edge 21a is connected via the first 90° bend 20a to a first intermediate portion 21b, and then via the second 90° bend 20b to a second intermediate portion 21c, and then via the third 90° bend 20c to a second opening edge 21d. The second opening edge 21d has a 180° hem to define an overlapping portion.

[0070] In this embodiment, the first opening edge 21a abuts the inward portion 3b of the bent edge 3 of the corresponding sides 2c, 2d. The second intermediate portion 21c abuts the rear side 2f of the body 2.

[0071] Preferably, the second type of reinforcement 20 is shaped and arranged so as to cover the recess 4 of the corresponding left side 2c or right side 2d. In particular, the second type of reinforcement 20 covers the open side of the recess 4.

[0072] The substrate 1 includes at least one third type of reinforcement 30. The third type of reinforcement 30 extends in a direction substantially parallel to the transverse direction (horizontal direction in the mounted state of the substrate 1). The third type of reinforcement 30 is at least partially arranged in the recess 4 of the top side 2a.

[0073] According to Figure 4 or Figure 5 In the preferred embodiment shown, the third type of reinforcement 30 has a U-shaped cross-section. Preferably, the third type of reinforcement 30 is attached to the top side 2a, in particular to the rearward portion 3a. Preferably, the third type of reinforcement 30 is attached to the downward-facing top side 2a. Preferably, the third type of reinforcement 30 is completely enclosed in the recess 4 of the top side 2a.

[0074] Preferably, the thickness of the third type of reinforcement 30 is greater than the thickness of the body 2. Preferably, the body 2 has a thickness equal to or less than 1 mm. Preferably, the third type of reinforcement 30 has a maximum thickness of 3 mm.

[0075] According to the preferred embodiment, the third type of reinforcement 30 includes a sheet material that includes a first 90° bend 30a, followed by a second 90° bend 30b.

[0076] In particular, the preferred and illustrated embodiment contemplates the use of:

[0077] A first type of reinforcement member 10, having two contact portions 11 attached to the rear side 2f and interspersed by a protruding portion 12 having a trapezoid-like cross-section;

[0078] Two second type of reinforcement members 20, having a cross-section extending in a shape of an open broken line similar to a rectangle.

[0079] A third type of reinforcement member 30, having a U-shaped cross-section.

[0080] This arrangement in which the reinforcement members 10, 20, 30 are combined with the bent edge 3 (especially the overlapping folded edge 3 of the bottom side 2b) ensures high stability, integrity and strength (i.e., safety), while having a reduced thickness compared to the prior art.

[0081] Preferably, the component is made of stainless steel.

[0082] The features of the metal sheet substrate used in an elevator according to the present invention clearly emerge from the above description, and so do the advantages.

[0083] In particular, the presence of the three types of reinforcement members and the proposed specific arrangement allow for the production of a substrate with structural stiffness, while being simpler and having a smaller thickness than previous solutions.

[0084] In addition, the combination of the bent edge and the reinforcement members enhances this result.

[0085] In addition, a preferred embodiment of the present invention relates to the use of non-welding techniques, such as bending of sheets and fixing by means of riveting or gluing. However, the present invention still contemplates the possibility of using welding.

[0086] Preferably, pre-painted sheets are used to manufacture the proposed door leaf, so a powder coating process is not required. However, the present invention still contemplates the possibility of using a powder coating process.

[0087] In addition, the proposed metal sheet substrate has an excellent fire rating.

[0088] In addition, the proposed substrate is lightweight and easy to handle during installation.

Claims

1. A metal sheet substrate (1) used in an elevator, comprising: A single body (2), the single body (2) extending from a top side (2a) to a bottom side (2b) in a longitudinal direction and from a left side (2c) to a right side (2d) in a transverse direction, the single body (2) having a front side (2e) and a rear side (2f); Wherein, as reinforcement, the edges (3) of both the top side (2a) and the bottom side (2b) and the edges (3) of both the left side (2c) and the right side (2d) are bent backward and inward to define a concave portion (4) extending along the corresponding side (2a, 2b, 2c, 2d) for each side; At least one first type of reinforcement (10), the at least one first type of reinforcement (10) extending in a direction substantially parallel to the longitudinal direction and attached to an intermediate region of the rear side (2f) of the body (2); At least two second type of reinforcements (20), the at least two second type of reinforcements (20) extending in a direction substantially parallel to the longitudinal direction, the second type of reinforcements (20) being at least partially disposed in the concave portions (4) of the left side (2c) and the right side (2d) respectively; At least one third type of reinforcement (30), the at least one third type of reinforcement (30) extending in a direction substantially parallel to the transverse direction, the third type of reinforcement (30) being at least partially disposed in the concave portion (4) of the top side (2a).

2. The metal sheet substrate (1) according to claim 1, wherein, The edge (3) of the bottom side (2b) includes a hem to define an overlapping portion for reinforcement.

3. The metal sheet substrate (1) according to claim 1 or 2, wherein, The edge (3) of the bottom side (2b) includes a first 90° bend, followed by a second 90° bend forming an open edge, the open edge having a 180° hem to define an overlapping portion.

4. The metal sheet substrate (1) according to any one of the preceding claims, wherein, The edges (3) of these sides (2a, 2b, 2c, 2d) include a backward portion (3a) and an inward portion (3b), the backward portion (3a) originating from the body (2) and extending away from the body on the rear side (2f), the inward portion (3b) originating from the backward portion (3) and extending along the rear side (2f) at a distance from it.

5. The metal sheet substrate (1) according to claim 4 when dependent on claim 3 or 4, wherein, The overlapping portion extends the entirety of the inward portion (3b) and at least a part of the backward portion (3a).

6. The metal sheet substrate (1) according to any one of the preceding claims, wherein, The at least one first type of reinforcement (10) includes two contact portions (11), the two contact portions (11) being attached to the rear side (2f) and separated by a protruding portion (12).

7. The metal sheet substrate (1) according to claim 6, wherein, the protruding portion (12) has a trapezoid-like cross-section.

8. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the second type of stiffener (20) is shaped and arranged to abut against both the curved edge (3) of the corresponding side (2c, 2d) of the body (2) and the rear side (2f).

9. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the second type of stiffener (20) is shaped and arranged to cover the recess (4) of the corresponding left side (2c) or right side (2d).

10. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the second type of stiffener (20) has a cross-section extending in an open broken line shape similar to a rectangle.

11. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the second type of stiffener (20) is given a first 90° bend (20a), followed by a second 90° bend (20b), and then a third 90° bend (20c) forming an open edge, and the open edge is then hemmed 180° (20d).

12. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the thickness of the at least one third type of stiffener (30) is greater than the thickness of the body (2).

13. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the at least one third type of stiffener (30) has a U-shaped cross-section.

14. The metal sheet substrate (1) according to any one of the preceding claims, wherein, the third type of stiffener (30) is completely enclosed in the recess (4) of the top side (2a).

15. An elevator comprising the metal sheet substrate (1) according to any one of the preceding claims.

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