HK1203184B - An elevator car and an elevator - Google Patents

Description

Elevator cars and elevators

Technical Field

The subject matter of the invention is an elevator car and an elevator, more particularly an elevator car and an elevator suitable for transporting people and/or goods.

Background Art

An elevator car is conventionally formed to comprise a car and a suspension device, the suspension device comprising hoisting ropes and a load-bearing frame, the load-bearing frame comprising a lower horizontal beam system, an upper horizontal beam system and also a first side vertical beam system and a second side vertical beam system, these beam systems being connected to each other so that they form a closed sling, inside which is an interior comprised in the car fixed to the beam system, which interior can receive cargo and/or passengers for transporting them in the interior of the elevator car.

Conventionally, the elevator car has been largely entirely contained within the aforementioned slings. Elevator cars are also known in the art in which the beams that form the sling structure of the aforementioned load-bearing frame are integrated into the wall, ceiling, or floor structures that define the interior of the car. Solutions of this type are presented in publications EP1970341 and WO9933743, among others. While vertical space usage is highly efficient, some free space remains underutilized, and it is not possible to modify the elevator car to suit site regulations and customer needs.

The outer surface of the roof of an elevator car is generally formed by a plate that is firmly and rigidly supported on an upper horizontal beam system. According to the prior art, there is a separate ceiling panel in the elevator car below the upper horizontal beam system and the aforementioned plate forming the outer surface. The roof panel can be a single-piece or multi-piece roof panel, and its bottom surface forms a planar surface that delimits the interior of the car. The roof panel is generally a plate-type structure that is very thin in terms of its thickness, in which the light-emitting elements are embedded. The ceiling panel structure already increases the total thickness of the roof structure by its own thickness plus the number of possible fastening gaps. The use of conventional methods of this type in combination with solutions according to the prior art results in a roof entity that is expensive in terms of its manufacturing costs, unnecessarily thick, heavy and technically complex.

This prior art is also disclosed in document US Pat. No. 6,209,686 B1 which presents structural details of a frame for an elevator car.

Summary of the Invention

The object of the present invention is to solve one or more of the disadvantages of the known solutions described above and the problems discussed later in the description of the invention. The object of the present invention is in particular to provide an elevator and an elevator car thereof which are of lightweight construction and which are easily adaptable to the needs of the operating site.

A novel elevator car for an elevator is proposed, the elevator car comprising a suspension device and a car, the suspension device being used to support the elevator car in an elevator shaft, the car comprising:

a free interior for receiving and transporting goods and/or passengers in the interior of the car of the elevator, the interior being delimited by at least the floor, the walls, the ceiling and preferably also by a door arrangement comprised in the car,

- floor units, vertical beam units and roof beam units, which are connected to one another so that they form a rectangular parallelepiped-shaped load-bearing frame structure of the elevator car,

- On the inner side of the frame structure there are a plurality of planar units of rectangular shape, fixed side by side to the frame structure and extending mainly from one edge side to the other edge side of the car, the uniform wall surface and/or ceiling surface of the car being formed by the plurality of planar units.

The frame structure includes one or more sandwich beam units and/or plate units, which include a first surface layer and a second surface layer and one or more core units, wherein the core units are formed from the first surface layer by cutting and bending, or by penetrating one or more core members from the cut edge of the first surface layer toward the second surface layer and by joining the core members to the second surface layer of the beam unit and/or plate unit. In addition, the rectangular planar units on the wall surface and/or on the top plate surface include sandwich plate units, which include a first surface layer and a second surface layer and one or more core units, wherein the core units are formed from the first surface layer by cutting and bending, or by penetrating one or more core members from the cut edge of the first surface layer toward the second surface layer and by joining the core members to the second surface layer of the plate unit. Hereby an elevator is achieved, wherein the structure of the elevator car is lightweight while still giving stiffness to the loadbearing frame structure and the wall and/or roof elements thereby enabling parametric design of the elevator car for elevators of different sizes.

In a preferred embodiment, the core unit is formed by cutting and bending, or by piercing one or more, preferably two, and most preferably four core members symmetrically or asymmetrically with respect to the opening of the surface core unit. Thus, an elevator car having a sandwich structure of beam or plate elements optimized for the operating area is realized.

In a preferred embodiment, at least one edge of the core member is straight. In a preferred embodiment, at least one edge of the opening is straight. Thus, an elevator car is achieved in which the sandwich structure of the bottom or plate elements is cost-effective.

The core unit is formed by cutting and bending, or by penetrating one or more core members from the first surface layer toward the second surface layer, or one or more core members from the second surface layer toward the first surface layer, or one or more core members from both the first surface layer and the second surface layer toward opposite surface layers.

Hereby is achieved an elevator in which the structure of the beams or plate elements of the elevator car is cheaper to produce than before and is optimized for the operating area.

In a preferred embodiment, the first and second skins are made of a metal material, preferably stainless steel or aluminum. Thus, an elevator is achieved in which the joining surfaces of the wall units, ceiling units and floor units of the elevator car and the fixing of the car to the frame structure are coordinated for connecting units of different types and made of different materials to the car.

In a preferred embodiment, the first surface layer is a metallic material, preferably stainless steel or aluminum, and the second surface layer is a non-metallic material, preferably plywood, plastic, glass, or an aromatic or carbon fiber reinforced laminated polymer composite. The plastic and polymer matrix materials can be thermoplastic or thermosetting depending on the requirements of the installation site. This provides an elevator in which the material of the elevator car wall unit can be selected based on the requirements and needs of the installation site.

In a preferred embodiment, the first surface layer is a metal material, preferably stainless steel or aluminum, and the second surface layer is a flame retardant material layer comprising a laminate on the front surface of the plywood and a second material layer on the rear surface of the plywood, thereby hardening the plywood and eliminating the bending of the plywood. The laminate on the front surface also gives the audience an attractive appearance. The laminate should be as thin as possible so as to increase the thickness and weight of the board as little as possible. The thickness of the flame retardant laminate ranges from 0.4 to 1 mm in one embodiment. For example, a laminate with a standard width of 1300 or 1500 mm can be used to cover the plywood. The flame retardant laminate can be formed by melamine impregnated decorative paper combined with flame retardant phenol-treated kraft paper. The flame retardant laminate can be graded at least as Class I B-s2,d1 according to the European flammability classification standard EN13501-1.

In a preferred embodiment, the core member formed by the first skin layer and/or the second skin layer is joined to the second skin layer and/or the first skin layer by welding, spot welding, bonding, riveting or by a press-fit joint.

In a preferred embodiment, the sandwich panel unit having the first and second skin layers includes one or more beam units forming at least part of the first skin layer and including one or more core units formed from the first skin layer by cutting and/or punching through and forming the core member from the cut edge toward the second skin layer and by joining the core member to the second skin layer of the panel unit. Thus, an elevator is achieved in which the distribution direction of the wall units of the elevator car can be easily changed from vertical to horizontal without significantly changing the frame structure of the car.

In a preferred embodiment the car comprises beam units and/or plate units comprising ventilation ducts and/or ventilation openings and/or communication cables and/or power cables between the equipment of the elevator car and the control unit and/or power supply of the elevator car.

In a preferred embodiment, the floor unit is a planar sandwich structure of a rectangular shape, which includes a sandwich panel unit, which includes a first surface layer, a second surface layer and one or more core units, and the core units are formed by cutting and bending from the first surface layer, or by passing one or more core components from the cut edge of the first surface layer toward the second surface layer and by joining the core components to the second surface layer of the panel unit.

In one other embodiment, the floor unit is a planar sandwich structure of rectangular shape comprising at least one surface plate and a core, the core being a channel or corrugated shape bent from metal or a honeycomb made of thermoplastic, such as a polypropylene honeycomb, and the surface plate being a metal material and being fixed to the core material by welding, spot welding, gluing, riveting or by press-fit joints.

In a preferred embodiment, the thickness of the surface layer of the beam unit and/or plate unit is preferably 0.5-5 mm, more preferably 0.7-3 mm, most preferably 1-2.5 mm, and the thickness of the core of the sandwich is preferably 3-20 mm, more preferably 4-15 mm, most preferably 5-10 mm.

In a preferred embodiment, the thickness of the first skin layer and the second skin layer of the sandwich beam unit and/or plate unit is 0.5-5 mm, more preferably 0.7-3 mm, most preferably 1-2.5 mm, and the thickness of the core of the sandwich is 10-100 mm, more preferably 15-50 mm, most preferably 20-40 mm.

In a preferred embodiment, the outer surfaces of the beam elements and/or plate elements form part of the visible outer surfaces of the elevator car and/or the inner surfaces of the beam elements and/or plate elements form part of the visible inner surfaces of the floor/walls delimiting the empty interior of the elevator car. Thus, an elevator is achieved, the space of the ceiling structure of the elevator car of which is more efficiently used than that of the walls.

In a preferred embodiment, the elevator car comprises a suspension device of the elevator car which is separate from the car roof. This provides an elevator whose car wall structure and/or roof structure consists of units with different functions and which can be adapted to the requirements of the operating location by modifying the units and their sequence relative to one another.

A novel elevator car is also proposed comprising an elevator car and a counterweight arrangement and ropes which suspend the counterweight and the elevator car and which pass around a diverting pulley. The elevator car is as defined in any of the preceding claims.

In a preferred embodiment, the elevator car is suspended by hoisting ropes which pass under the car of the elevator car.

In a preferred embodiment, the beam unit has a substantially uniform continuous structure in the longitudinal direction of the beam, and the width/height ratio of the cross section of the continuous structure is preferably at least 0.5, preferably 0.5-1, and more preferably 0.7-0.9. One advantage is the rigid structure and the ability to secure the top plate beam and other necessary structural elements, such as horizontal support elements for wall elements, to the vertical beams.

In a preferred embodiment, the length of the roof beam unit is in a length that preferably covers at least a majority of the length and width of the elevator car in the planar direction.

In a preferred embodiment, the horizontal distance between the above-mentioned horizontal roof beam units is at most 2000mm, preferably at most 1500mm, most preferably at most 1000mm. In this way, the roof beam structure is sufficiently rigid to work as part of the load-bearing frame structure of the car.

In a preferred embodiment, the length of the above-mentioned vertical beam unit is in a length that preferably covers at least a large part of the vertical height of the elevator car.

In a preferred embodiment, the vertical beam unit is rigidly fixed to the floor unit. In this way, the floor unit is firmly positioned and kept upright while stiffening the load-bearing frame structure of the car.

In a preferred embodiment, the car frame structure includes one or more vertical reinforcements fixed to the roof beam unit and the floor unit for rigidly joining them together, and the vertical reinforcements extend vertically from the roof beam to the floor unit for at least a substantial portion of the length of the vertical beam. In this manner, the car frame structure is durable and significantly stiffened.

In a preferred embodiment, the roof structure of the elevator car comprises one or more sandwich panel units, the sandwich panel unit comprising the first surface layer and the second surface layer, and the first surface layer comprising one or more core units, the core units being formed from the first surface layer by cutting and/or punching through and forming the core member from the cut edge toward the second surface layer and by joining the core member to the second surface layer of the panel unit. The bottom surface of the roof panel unit is placed against the top surface of the profile of the roof beam unit. The above-mentioned roof panel unit is thus simply supported in its position in the vertical direction and well withstands vertical loads applied from the outside on the surface of the roof panel unit.

In a preferred embodiment, the elevator car's roof structure comprises different functional roof units. This allows the elevator car's roof structure to be assembled according to varying structural and visual requirements. It is therefore advantageous to assemble the roof structure to include the necessary functional units and/or communication cables and/or electrical wiring, depending on the operating location. The material and position of the functional roof units in the elevator car's roof structure can also be varied, preferably according to the requirements and needs of the operating location.

In a preferred embodiment, the roof structure of the elevator car comprises one or more rectangular-shaped roof units, the long sides of which are mainly the width of the elevator car in length, while the short sides can be selected from preferably between 200-1000 mm, even more preferably between 300-800 mm, even more preferably between 350-500 mm.

In a preferred embodiment, the ceiling structure of the elevator car comprises one or more ceiling units, each of which comprises a bottom surface forming a surface delimiting the interior, and wherein the bottom and top surfaces of the ceiling units are at a vertical distance from each other such that a space is formed therebetween, in which air is preferably conducted to travel between the interior and the elevator shaft and/or power cables and/or communication cables. In this way, the space of the ceiling of the elevator car can be efficiently utilized.

In a preferred embodiment, a roof unit of the elevator car is supported from below by the above-mentioned roof beam unit, the functional roof unit comprising a bottom surface forming a surface defining the interior, thereby making the structure very compact.

In a preferred embodiment, the structure of the at least one luminous body integrated into the roof unit, preferably at least the light source and/or the reflective surface of the luminous body, is at least partially, preferably entirely, located beside the roof beam, i.e., at a point in the vertical direction of the roof beam. This makes the structure very compact.

In a preferred embodiment, the cross-sectional profile of each vertical beam unit of the car comprises vertical side surfaces, the width of which is preferably at least 10 mm, even more preferably at least 20 mm, most preferably at least 30 mm, thereby obtaining good rigidity and a compact structure for the vertical beams.

In a preferred embodiment, the cross-sectional profile of each roof beam unit of the above-mentioned car comprises a horizontal side surface, the width of which is preferably at least 10 mm, even more preferably at least 20 mm, most preferably at least 30 mm, thereby obtaining a good rigidity and a shallow structure for the roof beam.

In a preferred embodiment, the elevator car is suspended with hoisting ropes which are connected to the elevator car with means, such as via a diverting pulley system or equipment for fixing the ropes, which means are at the sides or below the elevator car.

In a preferred embodiment, the elevator car is suspended with hoisting ropes which are connected to the elevator car such that they support the elevator car via a diverting pulley system supported on the elevator car.

In a preferred embodiment, the elevator car is suspended with hoisting ropes passing around and below the elevator car.

An elevator as described anywhere above is preferably, but not necessarily, installed in a building. The elevator is preferably of a type in which the car is arranged to serve two or more landings. The car then preferably responds to calls from the landings and/or destination commands from within the car in order to serve people on the landings and/or within the elevator car. Preferably, the car has an interior space suitable for receiving one or more passengers. The car may have a roof, a ceiling, walls, and at least one door, all of which together form a closable and openable interior space. In this way, it is particularly well suited for serving passengers.

Some inventive embodiments are also presented in the description sections and in the drawings of the present application. The inventive content of the present application can be defined differently in the appended claims. In particular, if the invention is considered in terms of expressed or implicit subtasks or from the point of view of advantages or categories of advantages achieved, the inventive content can also consist of several separate inventions. In this case, some of the attributes contained in the appended claims may be redundant from the point of view of separate inventive concepts. The features of the various embodiments of the present invention can be applied in combination with other embodiments within the framework of the basic inventive concept. The additional features mentioned by each of the aforementioned embodiments can also form independent inventions individually and independently of the other embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be described mainly in conjunction with its preferred embodiments with reference to the accompanying drawings, in which:

FIG1 illustrates an elevator according to a preferred embodiment.

FIG2 illustrates the structure of a car of an elevator according to a preferred embodiment.

FIG. 3 illustrates a beam element according to one embodiment of the present invention.

FIG4 illustrates a beam element according to a preferred embodiment of the present invention.

FIG. 5 illustrates a panel unit according to one embodiment of the present invention.

DETAILED DESCRIPTION

FIG1 shows an elevator according to the present invention, comprising an elevator car 1, a counterweight 2, and a suspension system comprising ropes 3, the ropes of which interconnect the elevator car 1 and the counterweight 2. The elevator car 1 and the counterweight 2 are arranged to be moved by applying a vertical force to at least the elevator car 1 or the counterweight 2. To this end, the elevator includes means M4, 5 for applying the aforementioned force to at least the elevator car 1 or the counterweight 2. The suspension ropes 3 include one or more ropes. As shown, the elevator includes a rope pulley 6 located near the top of the movement path of the elevator car 1. The ropes of the suspension ropes 3, while supported on the rope pulley 6, support the elevator car 1 and the counterweight 2. In the illustrated embodiment, this is implemented using a 1:1 suspension, in which case the ropes of the suspension ropes 3 are fixed at their first ends to the elevator car 1 and at their second ends to the counterweight 2. While the suspension ratio can be another value, such as 2:1, a 1:1 suspension ratio is advantageous because creating a large number of bends would be counterproductive due to the space occupied by the bends. Preferably, the rope pulley 6 is a non-driven rope pulley, meaning that no forces are exerted in the longitudinal direction of the ropes by the outer surface of the ropes. This also allows the elevator's top section to be wide. Advantageously, the rope pulley 6 is located in the elevator shaft S, in which case a separate machine room is not required.

1 , the traction ropes 4 are connected to the elevator car and the counterweight, more specifically are suspended so as to be suspended from the elevator car 1 and from the counterweight 2, in which case the hoistway machine M can exert a downward pulling force on either of them via the transfer sheave 5 and the hoist ropes 4, depending on the desired direction of movement. It is not necessarily necessary to connect the traction ropes to both the elevator car 1 and the counterweight 2.

The elevator hoisting rope 3 can also be guided to pass over a driven rope pulley, i.e., a traction sheave, which is rotated by a hoisting machine M, which in this case is adjacent to the top end of the movement path of the elevator car 1. As the hoisting machine rotates, the traction sheave simultaneously moves the elevator car 1 and the counterweight 2 in the upward and downward directions, respectively, due to friction.

Figure 2 presents a frame structure 7 of a car of an elevator car 1 according to an embodiment of the present invention, which frame structure 7 includes four elongated vertical beam units 8 and two horizontally parallel first elongated roof beams 9 connected to the roof and fixed to the vertical beam units 8, and two horizontally parallel second elongated roof beams 10 that are at a distance from each other and mainly orthogonal to the roof beams 9, these adjacent roof beams 9 and 10 are fixed to each other, and the interior of the frame structure is defined by a space bounded by at least a planar floor unit 11 of a rectangular shape and the vertical beam units 8 and the roof beams 9 and 10.

FIG3 shows an embodiment of a first skin s of a sandwich beam element comprising a plurality of core elements c, the core elements c being formed from the first skin s by cutting and bending, or by passing four core members c' through the first skin s from the cut edge toward the second skin s'. The core elements c are formed by cutting and bending, or by passing four core members c' symmetrically about an opening o of the skin s. The edges of the core members c' are straight, and the edges of the opening o are also straight.

The vertical beam units 8 of the frame structure 7 of the car are sandwich beam units 8 of Figure 4, which include a first surface layer s and a second surface layer s' and a number of core units c, which are formed from the first surface layer s by cutting and bending, or by penetrating one or more core components c' from the cut edge of the first surface layer s toward the second surface layer s' and by joining the core components c' to the second surface layer s' of the beam unit 8. The surface layer s' is preferably a decorative surface integrated into the unit. The first surface layer s of the beam unit 8 can also be as shown in Figure 3. The vertical profile beam unit 8 has a mainly identical continuous cross-sectional profile in the longitudinal direction of the beam. Cutting and perforation are arranged in the vertical beam unit 8 for fixing devices, which are used to fix the wall units 12a-12f to the vertical beam unit 8. The vertical beam unit 8 of the car frame structure 7 is rigidly fixed at its bottom edge to the vertical side edges of the rectangular planar roof unit 11 and at its top edge to the horizontal first roof beam 9 by fixing means.

The rectangular, planar wall elements 12a-12f presented in FIG1 comprise sandwich-type panel elements comprising a first skin layer s and a second skin layer s′ and one or more core elements c formed from the first skin layer s by cutting and bending, or by penetrating one or more core members c′ from a cut edge of the first skin layer s toward the second skin layer s′ and by joining the core members c′ to the second skin layer s′ of the panel element. The wall elements 12a-12f also include one or more of the following functional features:

- sound-damping cladding integrated into the unit,

- a passenger user interface 13 integrated into the unit,

- an elevator control unit 14 integrated into the unit,

- one or more ventilation openings integrated into the unit,

- communication cables and/or power cables between the equipment of the elevator car and the control unit and/or power supply of the elevator car, integrated into the unit,

- a mirror 15 integrated into the unit and/or

- Decorative surface integrated into the unit for covering an opening point on the wall surface.

FIG1 shows the wall units 12a-12f shown in FIG5, which extend primarily from one side of the elevator car to the other and are fixed by fixing means to at least the vertical beam 8. In this figure, the wall units 12a-12f are shown as being arranged horizontally, i.e., they are fixed vertically one above the other to the frame structure 7 of the elevator car. The bottom wall unit is supported in a support unit, and the top wall unit is also fixed by fixing means to the ceiling beams 9 and/or 10 of the elevator car frame. The wall units can also be arranged vertically, in which case the wall units would extend primarily from the support unit upward to the ceiling beams 9 or 10, and the wall units can be fixed horizontally one beside the other to the frame structure 7 of the elevator car, for example, by fixing the wall units to the ceiling beams 9 or 10, to the vertical beams 8, and/or to vertical reinforcements.

FIG5 shows a planar sandwich panel element comprising a first skin s and a second skin s′ and a number of core elements c, the core elements c being formed from the first skin s by cutting and bending, or by penetrating one or more core members c′ from the cut edge of the first skin s towards the second skin s′ and by joining the core members c′ to the second skin s′ of the panel element. The bending of the core elements c is circular.

The floor unit 11 in Figure 1 is a planar sandwich structure in a rectangular shape, which includes a sandwich type panel unit, which includes a first surface layer s and a second surface layer s’ and several core units. The core unit c is formed by cutting and bending from the first surface layer s, or by passing one or more core components c’ from the cut edge of the first surface layer s toward the second surface layer s’ and joining the core component c’ to the second surface layer s’ of the panel unit by welding, spot welding, bonding, riveting or through a press joint.

The present invention is based on the following concept, an elevator car comprises a suspension device for supporting the elevator car in an elevator shaft and a car to be assembled according to site regulations and customer needs, the car comprising a free interior for receiving and transporting goods and/or passengers in the interior of the elevator's car, the interior being delimited by at least a floor, walls, a roof comprised in the car, a floor unit, a vertical beam unit and a roof beam and preferably also by a door arrangement, the floor unit and the vertical beams and the roof beam being connected to each other so that they form a rectangular parallelepiped-shaped load-bearing frame structure of the elevator's car, on the inner side of which there are a plurality of planar units in a rectangular shape, which are fixed in parallel to the frame structure and extend mainly from one edge side to the other edge side of the car, the uniform wall surface and/or roof surface of the car being formed by the frame structure, and the plurality of units comprising units that differ from each other with regard to the functions integrated into the units.

In a more refined embodiment of the concept according to the invention, the above-mentioned carrying frame and car are separated from each other, and the carrying frame is mainly fixed to the car via the floor unit.

In a more refined embodiment of the concept according to the invention, the above-mentioned load-bearing frame is integrated into the car, in which case at least the floor unit forms part of the load-bearing frame.

In a more refined embodiment of the concept according to the invention, the frame structure of the car of the elevator car comprises a floor unit, above which is the above-mentioned interior and which is rigidly connected to the above-mentioned vertical beams and on which the means for connecting the hoisting ropes to the elevator car, such as diverting pulleys or rope clamps, are supported.

In a more improved embodiment of the concept according to the invention, the above-mentioned frame structure of the car of the elevator car comprises vertical beams on a first side and vertical beams on a second side, between which there is the above-mentioned inner part, and these beams are rigidly connected to each other by means of the above-mentioned roof beams.

In a more improved embodiment of the concept according to the invention, the above-mentioned frame structure of the car of the elevator car comprises vertical beams on a first side and vertical beams on a second side, which beams are arranged in the corners of the rectangular-shaped floor unit and form, together with the floor unit, the edge sides of the cuboid-shaped frame structure.

All joints referred to in this application may be implemented mechanically, for example with screws and nuts, by riveting, by welding or by gluing. The joint means may comprise screws, nuts, rivets, tacks, nails or some other corresponding unit suitable for joining.

Some inventive embodiments are also presented in the description sections and in the drawings of the present application. The inventive content of the present application can also be defined differently in the claims presented below. In particular, if the invention is considered in terms of expressed or implicit subtasks or from the point of view of advantages or categories of advantages achieved, the inventive content can also consist of several separate inventions. In this case, some of the attributes contained in the following claims may be superfluous from the point of view of separate inventive concepts. The features of the various embodiments of the present invention can be applied in combination with other embodiments within the framework of the basic inventive concept. The additional features mentioned for each of the aforementioned embodiments can also form separate inventions individually and separately from the other embodiments.

It is clear to a person skilled in the art that the basic idea of the invention can be implemented in many different ways when developing the technology.The invention and its embodiments are therefore not limited to the examples described above, but instead they may vary within the scope of the claims.

Claims (21)

1. An elevator car (C) comprising a suspension device and a car body (1), the suspension device being used to support the elevator car (C) in an elevator shaft (S), the car body (1) comprising: - The interior, used for receiving and transporting goods and/or passengers, is defined by at least a floor, walls, and a ceiling. - Floor unit (11), vertical beam unit (8), and top beam unit (9, 10), wherein the floor unit (11), vertical beam unit (8), and top beam unit (9, 10) are interconnected, thereby forming a rectangular support frame structure (7) of the elevator car body (1). -On the inner side of the support frame structure (7) are multiple rectangular planar units (12a-f), which are fixed side by side to the support frame structure and extend mainly from one edge side to the other edge side of the car body (1). The uniform wall surface and/or top surface of the car body (1) are formed by the multiple planar units (12a-f). The characteristic feature is that the load-bearing frame structure (7) and/or the planar unit (12a-f) of the car body (1) includes one or more sandwich beam units and/or sandwich panel units, the sandwich beam units and/or sandwich panel units include a first surface layer (s) and a second surface layer (s’) and one or more core units (c), wherein the one or more core units (c) are formed from the first surface layer (s) by cutting and bending, or by perforating along the cut edge of the first surface layer (s) toward the second surface layer (s’), and the first surface layer (s) is joined to the second surface layer (s’) by one or more core members (c’), the cutting and bending, or perforation forming an opening in the first surface layer. 2. The elevator car (C) according to claim 1, wherein the interior is also defined by the door device included in the car body (1). 3. The elevator car (C) according to claim 1, characterized in that the one or more core components (c’) are formed symmetrically or asymmetrically with respect to the opening (o) that is cut or perforated into the first surface layer (s). 4. The elevator car (C) according to any one of claims 1 to 3, characterized in that at least one edge of the core member (c’) is straight. 5. The elevator car (C) according to any one of claims 1 to 3, characterized in that at least one edge of the opening (o) cut or perforated into the first surface (s) is straight. 6. The elevator car (C) according to any one of claims 1 to 3, characterized in that the first surface layer (s) and/or the second surface layer (s’) are made of metallic materials. 7. The elevator car (C) according to any one of claims 1 to 3, characterized in that the first surface layer (s) and/or the second surface layer (s’) are stainless steel or aluminum. 8. The elevator car (C) according to any one of claims 1 to 3, characterized in that the first surface layer (s) and/or the second surface layer (s’) are non-metallic materials. 9. The elevator car (C) according to any one of claims 1 to 3, characterized in that the first surface layer (s) and/or the second surface layer (s’) are plastic or fiber-reinforced laminated polymer composite materials. 10. The elevator car (C) according to any one of claims 1 to 3, characterized in that the first surface layer (s) and/or the second surface layer (s’) are flame-retardant plywood coated with a material layer including a flame-retardant laminate. 11. The elevator car (C) according to any one of claims 1 to 3, characterized in that the core component (c’) formed from the first surface layer (s) is joined to the second surface layer (s’) by welding, bonding, riveting or by a press-fit joint. 12. The elevator car (C) according to any one of claims 1 to 3, characterized in that the core component (c’) formed from the first surface layer (s) is spot welded to the second surface layer (s’). 13. The elevator car (C) according to any one of claims 1 to 3, characterized in that the aforementioned mezzanine panel unit having the first surface layer (s) and the second surface layer (s’) comprises one or more beam units, the one or more beam units forming at least a portion of the first surface layer (s) and comprising one or more core units (c), wherein the core unit (c) is formed from the first surface layer (s) by cutting and/or penetrating and forming the core member (c’) from the cut edge toward the second surface layer (s’) and by joining the core member (c’) to the second surface layer (s’) of the mezzanine panel unit. 14. The elevator car (C) according to any one of claims 1 to 3, characterized in that the car body (1) includes the mezzanine beam unit and/or mezzanine plate unit comprising ventilation ducts and/or ventilation openings and/or communication cables and/or power cables between the equipment of the elevator car (13) and the control unit (14) and/or power supply of the elevator car. 15. The elevator car (C) according to any one of claims 1 to 3, characterized in that the thickness of the first surface layer (s) and the second surface layer (s’) of the mezzanine beam unit and/or the mezzanine plate unit is 0.5-5 mm, and the thickness of the core of the mezzanine is 10-100 mm. 16. The elevator car (C) according to any one of claims 1 to 3, characterized in that the thickness of the first surface layer (s) and the second surface layer (s’) of the mezzanine beam unit and/or the mezzanine plate unit is 0.7-3 mm, and the thickness of the core of the mezzanine is 15-50 mm. 17. The elevator car (C) according to any one of claims 1 to 3, characterized in that the thickness of the first surface layer (s) and the second surface layer (s’) of the mezzanine beam unit and/or the mezzanine plate unit is 1-2.5 mm, and the thickness of the core of the mezzanine is 20-40 mm. 18. The elevator car (C) according to any one of claims 1 to 3, characterized in that the outer surfaces of the mezzanine beam units and/or mezzanine plate units form part of the visible outer surface of the elevator car body (1) and/or the inner surfaces of the mezzanine beam units and/or mezzanine plate units form part of the visible inner surface of the floor/wall/ceiling plate that defines the interior of the elevator car body (1). 19. The elevator car (C) according to any one of claims 1 to 3, characterized in that the suspension device of the elevator car (C) is separate from the car body (1). 20. The elevator car (C) according to any one of claims 1 to 3, characterized in that the elevator car (C) is suspended by a suspension device passing below the car body (1) of the elevator car (C). 21. An elevator comprising an elevator shaft (S) and an elevator car (C) arranged for movement within the elevator shaft (S), characterized in that the elevator car (C) is an elevator car (C) as defined in any one of the preceding claims 1 to 20.