EP4669609A1

EP4669609A1 - LIGHTING SYSTEM FOR AN ELEVATOR SYSTEM

Info

Publication number: EP4669609A1
Application number: EP24705705.2A
Authority: EP
Inventors: Antonio PERFETTO; Valerio Villa
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2023-02-24
Filing date: 2024-02-22
Publication date: 2025-12-31
Also published as: AU2024225908A1; WO2024175736A1; CN120677120A

Abstract

A lighting system for an elevator unit (100) of a building having a plurality of floors (101- 1, 101-2, 101-3, 101-4), is disclosed. The lighting system may include at least one first lighting device (114) and at least one second lighting device (116). The at least one first lighting device (114) is mounted on an external portion of an elevator car (104) of the elevator unit (100). The at least one first lighting device (114) is adapted to illuminate at least one of an elevator shaft (102) and an elevator pit (134) of the elevator unit (100). The at least one second lighting device (116) is mounted within the elevator shaft (102) and in proximity of a plurality of shaft doors (124-1, 124-2, 124-3, 124-4) on each floor (101-1, 101-2, 101-3, 101-4) of the building. The at least one second lighting device (116) is adapted to illuminate the elevator shaft (102).

Description

LIGHTING SYSTEM FOR AN ELEVATOR UNIT

The present invention relates to elevators and more particularly, to a lighting system for an elevator unit installed in a building having a plurality of floors.

Nowadays, elevators are installed in multi-story buildings, such as commercial buildings and residential buildings. An elevator includes an elevator shaft disposed along the multiple floors of a building. The elevator shaft includes a plurality of walls defining an enclosed space to accommodate one or more components of the elevator. The elevator shaft further includes an elevator pit disposed below a lowermost floor from among the multiple floors.

Moreover, the elevator includes a car adapted to be displaced along the elevator shaft between multiple floors using a drive unit. The car includes doors to be opened on multiple floors. The elevator shaft includes a plurality of landing doors provided at each floor. The plurality of landing doors may be opened and closed, respectively, along with an operation of the doors of the car.

Considering that the elevator shaft is usually enclosed by the plurality of shaft walls from each side, there is substantially no, or very less ambient light entering the elevator shaft. Therefore, there is a requirement to illuminate the elevator shaft during specific operations, such as maintenance operations. Currently, a plurality of lights is installed on the plurality of walls of the elevator shaft to provide illumination during a maintenance operation. However, the installation of such lights on the plurality of walls is a cumbersome task. In particular, each light, from among the plurality of lights, is required to be mounted on at least one of the plurality of walls at a predefined distance from subsequent light, to ensure proper illumination within the elevator shaft for the maintenance operations. The measurement of the distance between the plurality of lights requires a substantial amount of time and skilled personnel. This substantially increases the overall complexity and the cost associated with the installation of the plurality of lights in the elevator shaft.

During the maintenance operation, one or more operators may need to be present on a roof of the car to perform various maintenance tasks. Thus, the plurality of lights installed on the plurality of walls provides illumination within the elevator shaft for the operators to perform maintenance tasks. In existing elevators, an instant position of the car cannot be identified in the maintenance operation. Therefore, all of the plurality of lights are required to be switched ON to provide illumination. This increases a voltage drop that leads to providing ineffective illumination at the far end floors from among the multiple floors. The ineffective illumination may cause visibility problems for the operators and may hinder the maintenance tasks of the elevator. Further, the switching ON of all lights also results in high-power consumption, which substantially increases the overall operation cost of the existing elevators.

A light for an elevator system is disclosed in JP2012030942A and US2018339880A1. Therefore, there is an immense need to develop a lighting system that can eliminate one or more shortcomings associated with the abovementioned elevators.

It is in particular the object of the invention to provide a lighting system for an elevator unit installed in a building having a plurality of floors. The lighting system is adapted to provide illumination on at least one floor from among the plurality of floors in an inspection mode. According to the invention, this object is solved by the lighting system having the features of claim 1, an elevator unit having the features of claim 15, and a method of installing the lighting system having the features of claim 16.

The lighting system for an elevator unit of the building having a plurality of floors is disclosed in the present invention. The lighting system may include at least one first lighting device and at least one second lighting device, preferably a plurality of second lighting devices. The at least one first lighting device is mounted on an external portion of an elevator car of the elevator unit. The at least one first lighting device is adapted to illuminate at least one of an elevator shaft and an elevator pit of the elevator unit. The at least one second lighting device is mounted within the elevator shaft and in proximity of a plurality of shaft doors on each floor of the plurality of floors of the building. The at least one second lighting device is adapted to illuminate the elevator shaft.

As mentioned above, the lighting system may illuminate the elevator shaft and/or the elevator pit in an inspection mode. The at least one first lighting device of the lighting system, may continuously illuminate the elevator shaft and/or the elevator pit in particular for performing maintenance tasks. The at least one first lighting device may be mounted on the external portion of the elevator car during the installation of the elevator unit, that reduces an installation time associated with the mounting of at least one first lighting device. The at least one first lightning device may in particular be mounted on the car door operator panel, which may include a car door control unit, a car door lock, a car door drive and/or a car door power unit. The car door operator panel can be assembled in the factory and then be brought to the site, where it is installed in the shaft.

Further, each of the plurality of shaft doors is more reachable portion so the mounting of the at least one second lighting device in proximity of the respective shaft door is easy and consumes less time. Moreover, the placement of the at least one second lighting device in proximity of one of the plurality of shaft doors, may provide a better illumination on a specific floor, adjacent the respective door, where the maintenance task is to be performed in inspection mode.

In an embodiment, the at least one, preferably each a, second lighting deviceis mounted at one of a top portion and a side periphery of each of the plurality of shaft doors. The at least one second lighting device may be easily mounted as the top and the side periphery of each shaft door is easily accessible to mount the at least one second lighting device. In particular the at least one second lighting device may be mounted on the door operator panel, which may include a shaft door control unit, a shaft door lock, a shaft door drive and/or a shaft door power unit. The shaft door operator panel can be assembled in the factory and then be brought to the site, where it is installed in the shaft. Thus, the installation of the at least one second lighting device requires less time and effort and preferably can be done at the factory (not on site). In another embodiment the at least one second lighting device may be positioned at the bottom periphery of each shaft door, in particular on a toe guard of the shaft door.

In an embodiment, the lighting system may include a first power source and a plurality of second power sources. The first power source is electrically connected to the at least one first lighting device, and at least one of the second power sources, preferably each of the second power sources, is electrically connected to the at least one second lighting device, preferably to each a second lighting device.

In an embodiment, the first power source is positioned on the elevator car and each of the second power sources is positioned at each of the plurality of shaft doors. The first power source may be adapted to supply power to the elevator car, and the at least one first lighting device may receive power from the elevator car. The at least one of the second power sources may be adapted to supply power to the plurality of shaft doors.

In an embodiment, each second lighting device is electrically connected to each second power source positioned at respective shaft doors. The at least one of the second power sources may be adapted to supply power to each second lighting device positioned at respective shaft doors.

The first power source may supply power to the elevator car and the at least one first lighting device, so no separate power source for the at least one first lighting device is needed. Similarly, the second power source may supply power to respective shaft doors on which the second power source may be positioned, and the second power source may also supply power to each second lighting device positioned at respective shaft doors. Thus, there is no need to install separate power sources for supplying the power to the respective shaft doors and each second lighting device.

In an embodiment, at least one of the second power sources positioned at a shaft door, from among the plurality of shaft doors, is electrically connected to the at least one second lighting device positioned on the shaft door at which the second power source is positioned. The at least one of the second power sources positioned at a shaft door, from among the plurality of shaft doors, is electrically connected to the at least one second lighting device positioned on a shaft door, from among the plurality of shaft doors, underneath the shaft door at which the second power source is positioned. The at least one of the second power sources positioned at a shaft door, from among the plurality of shaft doors, is electrically connected to the at least one second lighting device positioned on a shaft door, from among the plurality of shaft doors, above the shaft door at which the second power source is positioned. Accordingly, each of the second power sources may supply power to more than one second lighting device positioned on the respective shaft doors at different floors. This may reduce the installation cost of the separate second power sources for individually supplying power to each of the second lighting devices.

In an embodiment, each a second power source is electrically connected to each a control unit positioned at each of the plurality of shaft doors and configured to control an operation of the respective second lighting device via the respective second power source.

In an embodiment, at least one of the, preferably each a, second power source is electrically connected to a shaft-door control unit, preferably to each a shaft-door control unit, from among a plurality of shaft-door control units. The second power source is adapted to be actuated to operate the at least one, preferably each a, second lighting device, between an ON-state and an OFF-state. The shaft-door control unit may control an operation of the shaft doors, and also actuate the at least one second lighting device positioned on the respective shaft doors in accordance with the operation of the shaft doors.

The second power source is positioned close to the shaft-door control unit from among a plurality of shaft-door control units. Therefore, extra wiring is not required to make a connection. Along with controlling the operation of the shaft doors (controlling a lock and/or controlling a shaft door drive), the shaft-door control unit may also actuate the at least one second lighting device positioned on the respective shaft doors. Thus, a separate controller is not required for actuating the at least one second lighting device in accordance with the operation of the shaft doors.

In an embodiment, the at least one first lighting device and the at least one second lighting device are operated based on at least a position of the elevator car within the elevator shaft. The at least one second lighting device may be in the ON-state during the inspection mode based on the position of the elevator car on the specific floor where the maintenance tasks are to be performed, and all other second lighting devices may be in the OFF-state. This prevents the voltage drop and provides an effective illumination on each of the plurality of floors in the inspection mode. Moreover, the switching ON of the at least one second lighting device may reduce the power consumption of the elevator unit during the inspection mode.

In an embodiment, at least one of the second power sources, preferably each of the second power sources, is actuated by a, preferably each a, shaft-door control unit at a floor to operate the at least one second lighting device, mounted at a shaft door corresponding to the floor, to the ON-state, when the elevator car is displaced to a position in which a roof of the elevator car is adjacent to the shaft door.

In an embodiment, the second power source is actuated by the shaft-door control unit to the OFF-state, when the elevator car is displaced to a position in which the roof of the elevator car is adjacent to a shaft door above one of the shaft doors at which the at least one second lighting device is mounted. In an embodiment, the at least one first lighting device is mounted on the external portion of the roof of the elevator car. The roof of the elevator car is easily accessible for the operator so that the at least one first lighting device may be easily mounted.

In an embodiment, the at least one first lighting device is mounted on the external portion of the floor/bottom of the elevator car. The floor/bottom of the elevator car is easily accessible for the mounting of the at least one first lighting device, so the installation time may be reduced.

In an embodiment, the at least one first lighting device is mounted on the external portion of the elevator car using one of adhesives and mechanical fasteners. Further, the at least one second lighting device is mounted, within the elevator shaft, at each of the plurality of shaft doors using one of the adhesives and the mechanical fastener.

In one or more embodiments, the elevator unit may include an elevator shaft, at least one shaft-door control unit, at least one elevator car, and the lighting system. The elevator shaft having a plurality of shaft doors at each floor of a building. The at least one shaftdoor control unit is disposed at each of the plurality of shaft doors for controlling an operation of the respective shaft door. The at least one elevator car is adapted to displace within the elevator shaft. The lighting system is adapted to illuminate at least one of the elevator shaft, and an elevator pit. The elevator unit may be installed in the building having the plurality of floors. The lighting system may provide illumination in the elevator shaft at all of the floors in the inspection mode with less power consumption. This provides better illumination for the operator performing maintenance tasks and also reduces an overall inspection cost.

A method of installing the lighting system in an elevator unit is disclosed in the present invention. The method may include an installation of the at least one first lighting device of the lighting system at an external portion of an elevator car of the elevator unit to illuminate at least one of an elevator shaft, and an elevator pit. Further, the method may include an installation of the at least one second lighting device of the lighting system, within the elevator shaft. The at least one second lighting device is installed in proximity of each shaft door, from among a plurality of shaft doors of a building, to illuminate the elevator shaft.

As mentioned above, the method may include an installation of the at least one first lighting device at an external portion of an elevator car, and an installation of the at least one second lighting device installed in proximity of each shaft door within the elevator shaft. The method of installation is easy to implement as the at least one second lighting device is mounted in the proximity of the each of the plurality of shaft doors. The method does not need any measurement of distance along the elevator shaft in between two lighting devices to be mounted on the elevator shaft. Thus, the method of installation consumes less time which reduces the overall installation cost of the lighting system. The object mentioned above is solved by the lighting system for the elevator unit. The lighting system may include at least one first lighting device and at least one second lighting device. The at least one first lighting device is mounted on the external portion of the elevator car of the elevator unit. The at least one first lighting device is adapted to illuminate at least one of the elevator shafts and the elevator pit of the elevator unit. Further, the at least one second lighting device is mounted within the elevator shaft and in proximity of a plurality of shaft doors on each floor of the plurality of floors of the building. The at least one second lighting device is adapted to illuminate the elevator shaft. The lighting system is adapted to illuminate the elevator shaft of the elevator unit in an inspection mode according to any of the claims 1 to 16.

The term “elevator shaft” may be referred to as an enclosed space formed by a plurality of walls of the elevator shaft to accommodate one or more components of the elevator unit.

The term “elevator pit” may be referred to as an enclosed space formed below a lowermost floor. The elevator pit may be formed as an integral part of the elevator shaft.

The term “inspection mode” may be referred to as a mode in which the operator requires access to the elevator shaft in order to inspect an integrity of components of the elevator unit installed within the elevator shaft.

The term “external portion” may be referred to as either the outer surface of the floor of the elevator car or the outer surface of the roof of the elevator car.

Additional advantages, features, and details of the invention result using the following description of exemplary embodiments and using drawings in which the same or functionally identical elements are provided having identical reference signs.

To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.

These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

Figure 1 illustrates a schematic view of an elevator unit with a lighting system, according to an embodiment of the present invention; Figure 2a illustrates a schematic view of at least one second lighting device of the lighting system, mounted at a top portion of each of a plurality of shaft doors of the elevator shaft, according to an embodiment of the present invention;

Figure 2b illustrates a schematic view of the at least one second lighting device of the lighting system, mounted at the top portion and a side periphery of each of the plurality of shaft doors of the elevator shaft, according to another embodiment of the present invention;

Figure 3 illustrates a schematic view of the elevator shaft depicting an arrangement of second lighting devices at a plurality of shaft doors, according to an embodiment of the present invention;

Figure 4 illustrates a schematic view of the elevator shaft depicting an arrangement of second lighting devices at the plurality of shaft doors, according to another embodiment of the present invention;

Figure 5 illustrates a schematic view of the elevator shaft depicting an arrangement of second lighting devices at the plurality of shaft doors, according to yet another embodiment of the present invention;

Figure 6 illustrates a schematic view of the elevator shaft depicting the at least one second lighting device mounted at one of the plurality of shaft doors in an ON-state, according to an embodiment of the present invention;

Figure 7 illustrates a schematic view of the elevator shaft depicting the at least one second lighting device mounted at one of the plurality of shaft doors in an OFF-state, according to an embodiment of the present invention;

Figure 8a illustrates a schematic view of at least one first lighting device of the lighting system, mounted on an external portion of a floor of the elevator car, according to an embodiment of the present invention;

Figure 8b illustrates a schematic view of the at least one first lighting device mounted on an external portion of a roof of the elevator car, according to another embodiment of the present invention; and

Figure 8c illustrates a schematic view of the at least one first lighting device mounted on the external portion of the roof of the elevator car and on the external portion of the floor of the elevator car, according to yet another embodiment of the present invention. Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have necessarily been drawn to scale. For example, the flow charts illustrate the method in terms of the most prominent steps involved to help to improve understanding of aspects of the present invention. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skilled in the art to which this invention belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.

Any particular and all details set forth herein are used in the context of some embodiments and therefore should NOT be necessarily taken as limiting factors to the attached claims. The attached claims and their legal equivalents can be realized in the context of embodiments other than the ones used as illustrative examples in the description below.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Figure 1 illustrates a schematic view of an elevator unit 100, according to an embodiment of the present invention. The elevator unit 100 may be installed in a building having a plurality of floors 101-1, 101-2, 101-3, 101-4. The elevator unit 100 may include, an elevator shaft 102, at least one elevator car 104, a counterweight 106, a suspension traction member 110, a drive machine 108, and a lighting system. In the illustrated embodiment, the plurality of floors 101-1, 101-2, 101-3, 101-4 may include, but is not limited to, a first floor 101-1, a second floor 101-2, a third floor 101-3, and a fourth floor 101-4. The first floor 101-1 may be embodied as a lowermost floor, and the fourth floor 101-4 may be embodied as a topmost floor, without departing from the scope of the present invention. The plurality of floors 101-1, 101-2, 101-3, 101-4 may interchangeably be referred to as the floor 101-1, 101-2, 101-3, 101-4, without departing from the scope of the present disclosure. Although, the lighting system is explained with respect to the elevator unit 100 installed in the building having four floors. However, this should not be construed as limiting and, the lighting system can also be implemented for the elevator unit 100 installed in the building having more or less than four floors, without departing from the scope of the present invention. In another embodiment, the plurality of floors may include more than four floors. In yet another embodiment, the plurality of floors may include less than four floors.

The elevator shaft 102 is vertically positioned along the plurality of floors 101-1, 101-2, 101-3, 101-4. The elevator shaft 102 includes a plurality of walls 103 adapted to form an enclosed space to accommodate one or more components of the elevator unit 100. The elevator shaft 102 may include, an elevator pit 134 formed below a lowermost floor from among the plurality of floors 101-1, 101-2, 101-3, 101-4. The elevator pit 134 may be embodied as an enclosed space defined by the plurality of walls 103 for accommodating various sub-components including but is not limited to, buffer springs, hydraulic or electrical jacks, ladders, and electrical wirings of the elevator unit 100.

The at least one elevator car 104 may be adapted to be displaced within the elevator shaft 102 between the plurality of floors 101-1, 101-2, 101-3, 101-4 of the building. In an embodiment, the elevator car 104 is adapted to move along the elevator shaft 102. The elevator car 104 is held and displaced along the elevator shaft 102 by the suspension traction member 110. In an embodiment, the suspension traction member 110 may be embodied as one of a rope and a belt, without departing from the scope of the present invention. An operation of the suspension traction member 110 is controlled by the drive machine 108. An engine controller 136 is positioned on the elevator unit 100 for controlling an operation of the drive machine 108. The counterweight 106 is adapted to counterbalance a sum of a load of the elevator car 104 and a predetermined load associated with a payload capacity of the elevator car 104.

The elevator car 104 may include, but is not limited to, a floor 118, a roof 120 opposite to the floor 118, and a plurality of side walls 119. The roof 120, the floor 118, and the plurality of side walls 119 may collectively form a space to accommodate and carry one or more passengers between the plurality of floors of the building. The elevator car 104 may include at least a pair of car doors adapted to be operated by a car-door control unit (not shown) positioned in the elevator car 104. The pair of car doors may be adapted to be opened and closed on each floor from among the plurality of floors 101-1, 101-2, 101-3, 101-4.

The lighting system may be adapted to illuminate the elevator shaft 102 of the elevator unit 100. In an embodiment, the lighting system may be employed in the elevator unit 100 to provide illumination within the elevator shaft 102 in an inspection mode. Although the lighting system is explained with the inspection mode in the present invention, this should not be construed as limiting and the same can also be used for other applications, without departing from the scope of the present invention. In an embodiment, the lighting system may include at least one first lighting device 114 mounted on an external portion of at least one elevator car 104, and at least one second lighting device 116 mounted within the elevator shaft 102.

Referring to Figure 1, in order to perform any maintenance task, the elevator unit 100 may be operated in the inspection mode. During the inspection mode, the elevator car 104 may be moved to a specific floor 101-1, 101-2, 101-3, 101-4 where the maintenance task is to be performed. The elevator car 104 may be positioned in the elevator shaft 102 such that the roof 120 of the elevator car 104 aligns with the floor 101-1, 101-2, 101-3, 101-4 on which the maintenance task is to be performed. Thereafter, to perform the maintenance tasks, the operator may enter the elevator shaft 102 and uses the roof 120 of the elevator car 104 as a platform. The lighting system may be provided to illuminate the elevator shaft 102 so that the operator on the roof 120 of the elevator car 104 while working in the elevator shaft 102, may have sufficient visibility.

The elevator shaft 102 may include a plurality of shaft doors 124-1, 124-2, 124-3, 124-4 positioned at the plurality of floors 101-1, 101-2, 101-3, 101-4. Further, the elevator shaft 102 may include a plurality of shaft-door control units 112-1, 112-2, 112-3. The plurality of shaft-door control units 112-1, 112-2, 112-3 may be adapted to control operations, such as closing/opening and/or locking/unlocking, of the respective shaft doors 124-1, 124-2, 124-3, 124-4. In an embodiment, when the elevator car 104 reaches one of the floors 101-1, 101-2, 101-3, 101-4, then one of the shaft-door control units 112-1, 112- 2, 112-3 may open/unlock the respective shaft door 124-1, 124-2, 124-3, 124-4 based on the opening of the doors of the elevator car 104. In another embodiment, in the inspection mode, when the roof 120 of the elevator car 104 aligns with one of the floors 101-1, 101- 2, 101-3, 101-4, then one of the shaft-door control units 112-1, 112-2, 112-3 may open/unlock the respective shaft door 124-1, 124-2, 124-3, 124-4 to allow the entrance of the operator for performing the maintenance operation.

In an embodiment, the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 may include, but is not limited to, a first shaft door 124-1, a second shaft door 124-2, a third shaft door 124-3, and a fourth shaft door 124-4. Herein, the first shaft door 124-1 may be positioned adjacent to the first floor 101-1 while the second shaft door 124-2 may be positioned adjacent to the second floor 101-2. Further, the third shaft door 124-3 may be positioned adjacent to the third floor 101-3 while the fourth shaft door 124-4 may be positioned adjacent to the fourth floor 101-4. In another embodiment, the plurality of shaft doors may include more than four shaft doors.

Figure 2a illustrates a schematic view of at least one second lighting device 116 of the lighting system mounted at a top portion 126 of each of a plurality of shaft doors 124- 1, 124-2, 124-3, 124-4 of the elevator shaft 102, and Figure 2b illustrates a schematic view of the at least one second lighting device 116 mounted at the top portion 126 and a side periphery 130 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 of the elevator shaft 102. Referring to Figures 2a and 2b, each of the plurality of shaft doors 124- 1, 124-2, 124-3, 124-4 may be positioned at each floor 101-1, 101-2, 101-3, 101-4 of the building. The at least one second lighting device 116 may be mounted within the elevator shaft 102 and in proximity of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 on each floor of the plurality of floors 101-1, 101-2, 101-3, 101-4 of the building. The at least one second lighting device 116 may be adapted to illuminate the elevator shaft 102 in the inspection mode. In the illustrated embodiment, a plurality of second lighting devices 116- 1 (not visible), 116-2 (not visible), 116-3 (not visible), 116-4 (not visible) may be mounted in proximity to the plurality of shaft doors 124-1, 124-2, 124-3, 124-4, respectively. The plurality of second lighting devices 116-1, 116-2, 116-3, 116-4 may interchangeably be referred to as the second lighting devices 116.

Each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 may include the top portion 126 and a bottom portion 128 opposite to the top portion 126. In an embodiment, referring to Figure 2a, the at least one second lighting device 116 is mounted at the top portion 126 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4. In another embodiment, the at least one second lighting device 116 may be mounted at a side periphery 130 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4. In yet another embodiment, referring to Figure 2b, the at least one second lighting device 116 may be mounted at the top portion 126 and the side periphery 130 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4.

In one embodiment, the at least one second lighting device 116 is mounted at the top portion 126 and/or the side periphery 130 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 using adhesives. The adhesives may include, but are not limited to, glue and/or any non-metallic substance that can be used for affixing surfaces, without departing from the scope of the present invention. In another embodiment, the at least one second lighting device 116 is mounted at the top portion 126 and/or the side periphery 130 of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 using mechanical fasteners. The mechanical fasteners may include, but are not limited to, screws and/or rivets, without departing from the scope of the present invention. In an embodiment, the at least one second lighting device 116 may be embodied as at least one Light Emitting Diodes (LED). In an embodiment, more than one second lighting devices 116 may be mounted at the top portion 126 of each shaft door 124-1, 124-2, 124-3, 124-4. In one embodiment, more than one second lighting devices 116 may be mounted at the top portion 126 and/or the side periphery 130 of each shaft door 124-1, 124-2, 124-3, 124-4.

Figure 3 illustrates a schematic view of the elevator shaft 102 depicting arrangement of second lighting devices 116 at the plurality of shaft doors 124-1, 124-2, 124-3, 124-4, according to an embodiment of the present invention, while Figure 4 illustrates a schematic view of the elevator shaft 102 depicting arrangement of second lighting devices 116 at the plurality of shaft doors 124-1, 124-2, 124-3, 124-4, according to another embodiment of the present invention. Further, Figure 5 illustrates a schematic view of the elevator shaft 102 depicting the arrangement of second lighting devices 116 at the plurality of shaft doors 124-1, 124-2, 124-3, 124-4, according to yet another embodiment of the present invention. Referring to Figures 3, 4, and 5, the lighting system may include a plurality of second power sources 132-1, 132-2, 132-3 electrically connected with the at least one second lighting device 116 positioned of the plurality of shaft doors 124-1, 124-2, 124-3. Each second lighting device 116 may be electrically connected to each second power source 132-1, 132-2, 132-3 positioned at respective shaft doors 124-1, 124- 2, 124-3 to receive the power.

The plurality of shaft-doors 124-1, 124-2, 124-3, 124-4 may interchangeably be referred to as the shaft-doors 124 and/or the shaft-doors 124-1, 124-2, 124-3, 124-4. Further, the shaft-doors 124-1, 124-2, 124-3, may individually be referred to as the shaftdoor 124, without departing from the scope of the present disclosure. The at least one of the second power sources 132-1, 132-2, 132-3 is positioned at a shaft door, from among the plurality of shaft doors 124-1, 124-2, 124-3. The at least one of the second power sources 132-1, 132-2, 132-3 is electrically connected to the at least one second lighting device 116 positioned on a shaft door at which the second power source is positioned. In an embodiment, the second power sources 132-1, 132-2, 132-3 may be electrically connected to the second lighting devices 116-1, 116-2, 116-3, respectively. In one embodiment, each of the second power sources 132-1, 132-2, 132-3 may be embodied as a power source that is also implemented for supplying power to control the operation of the respective shaft door 124-1, 124-2, 124-3. In another embodiment, each of the second power sources 132-1, 132-2, 132-3 may be embodied as a standalone power source. The second power sources 132-1, 132-2, 132-3 may interchangeably be referred to as the second power source 132, without departing from the scope of the present disclosure.

In an embodiment, the at least one of the second power sources 132-1, 132-2, 132- 3 may be electrically connected to the at least one second lighting device 116 positioned on a shaft door, from among the plurality of shaft doors 124-1, 124-2, 124-3, underneath the shaft door at which the at least one of the second power sources is positioned. Referring to Figure 3, in the illustrated embodiment, the second power source 132-2 may be electrically connected to the second lighting device 116-1 positioned on the first shaft door 124-1 underneath the second shaft door 124-2 at which the second power source 132-2 is positioned. In such an embodiment, the second power source 132-2 may also be electrically connected to 116-2 positioned on the second shaft door 124-2.

In another embodiment, the at least one of the second power sources 132-1, 132-2, 132-3 may be electrically connected to the at least one second lighting device 116 positioned on a shaft door, from among the plurality of shaft doors 124-1, 124-2, 124-3, above the shaft door at which the at least one of the second power sources 132-1, 132-2, 132-3 is positioned. Referring to Figure 4, the second power source 132-2 may be electrically connected to the second lighting device 116-3 positioned on the third shaft door 124-3 above the second shaft door 124-2 at which the second power source 132-2 is positioned. In such an embodiment, the second power source 132-2 may also be electrically connected to 116-2 positioned on the second shaft door 124-2. In yet another embodiment, the at least one of the second power sources 132-1, 132-2, 132-3 may be electrically connected to the more than one second lighting devices positioned on shaft doors 124-1, 124-2, 124-3 above and underneath a shaft door at which the at least one of the second power sources 132-1, 132-2, 132-3 is positioned. Referring to Figure 5, the second power source 132-2 positioned on the second shaft door 124-2, may be electrically connected to the second lighting device 116-3 positioned on the third shaft door 124-3 above the second shaft door 124-2, and to the second lighting device 116-1 on the first shaft door 124-1 underneath the second shaft door 124-2. In such an embodiment, the second power source 132-2 may also be electrically connected to 116-2 positioned on the second shaft door 124-2.

The elevator unit 100 may include a control unit (not shown) positioned within the elevator shaft 102. The plurality of second power sources 132-1, 132-2, 132-3 is electrically connected to the control unit. In an embodiment, the control unit may include a processor, memory, module(s), and data. The module(s) and the memory are coupled to the processor. The processor can be a single processing unit or a number of units, all of which could include multiple computing units. The processor may be implemented as one or more microprocessors, microcomputers, microcontrollers, digital signal processors, central processing units, state machines, logic circuitries, and/or any devices that manipulate signals based on operational instructions. Among other capabilities, the processor is configured to fetch and execute computer-readable instructions and data stored in the memory.

The memory may include any non-transitory computer-readable medium known in the art including, for example, volatile memory, such as static random-access memory (SRAM) and dynamic random -access memory (DRAM), and/or non-volatile memory, such as read-only memory (ROM), erasable programmable ROM, flash memories, hard disks, optical disks, and magnetic tapes. In an embodiment, the memory of the controlling unit 204 may be configured to store the set of protocols corresponding to each of the hazardous events. Further, the memory of the controlling unit 204 may be configured to store historical data associated with at least one hazardous event that occurred in the environment.

The module(s), amongst other things, include routines, programs, objects, components, data structures, etc., which perform particular tasks or implement data types. The module(s) may also be implemented as, signal processor(s), state machine(s), logic circuitries, and/or any other device or component that manipulates signals based on operational instructions. Further, the module(s) may be implemented in hardware, instructions executed by at least one processing unit, e.g., the processor, or by a combination thereof. The processing unit may comprise a computer, a processor, a state machine, a logic array, and/or any other suitable devices capable of processing instructions. The processing unit may be a general-purpose processor which executes instructions to cause the general-purpose processor to perform operations or, the processing unit may be dedicated to perform the required functions. In some example embodiments, the module(s) may be machine-readable instructions (software, such as web-application, mobile application, program, etc.) which, when executed by a processor/processing unit, perform any of the described functionalities.

The control unit is adapted to control an operation of the at least one second lighting device 116 via the plurality of second power sources 132-1, 132-2, 132-3. In an embodiment, the control unit is positioned at each of the plurality of shaft doors 124-1, 124-2, 124-3, and the at least one of the second power sources from among the plurality of second power sources 132-1, 132-2, 132-3 is electrically connected to the control unit. In an embodiment, the control unit may be embodied as a shaft-door control unit located at each of the plurality of shaft doors 124-1, 124-2, 124-3.

The plurality of shaft doors 124-1, 124-2, 124-3 may be adapted to be opened/unlocked and closed/locked on each floor 101-1, 101-2, 101-3, 101-4, based on at least a position of the elevator car 104 within the elevator shaft 102. The opening/unlocking and the closing/locking of the plurality of shaft doors 124-1, 124-2, 124-3 on each floor may be controlled by at least one shaft-door control unit 112-1, 112-2, 112-3 from among the plurality of shaft-door control units 112-1, 112-2, 112-3. The at least one shaft-door control unit 112-1, 112-2, 112-3 is positioned within the elevator shaft 102 at each of the plurality of shaft doors 124-1, 124-2, 124-3 for controlling an operation of respective shaft door. In an embodiment, each of the plurality of shaft-door control units 112-1, 112-2, 112- 3 may be mounted, in proximity to the second lighting devices, at the top portion of the respective shaft door. The operation of the respective shaft door may be referred to as the opening/unlocking and closing/locking of the respective shaft door.

The plurality of shaft-door control units 112-1, 112-2, 112-3 may include, but is not limited to, a first shaft-door control unit 112-1 may be positioned on the first shaft door 124-1, a second shaft-door control unit 112-2 may be positioned on the second shaft door 124-2, and a third shaft-door control unit 112-3 may be positioned on third shaft door 124- 3. The plurality of shaft-door control units 112-1, 112-2, 112-3 may interchangeably be referred to as the shaft-door control units 112 and/or the shaft-door control units 112-1, 112-2, 112-3. Further, the shaft-door control units 112-1, 112-2, 112-3, may individually be referred to as the shaft-door control unit 112, without departing from the scope of the present disclosure. In an embodiment, the plurality of shaft-door control units 112 may include less than three shaft-door control units. In another embodiment, the plurality of shaft-door control units 112 may include more than three shaft-door control units.

In an embodiment, the shaft-door control units 112-1, 112-2, 112-3 of the elevator unit 100 may be adapted to be actuated to operate the at least one second lighting device 116, positioned at the plurality of shaft doors 124-1, 124-2, 124-3, between an ON-state and an OFF-state. The plurality of second power sources 132-1, 132-2, 132-3 is electrically connected to the plurality of shaft-door control units 112-1, 112-2, 112-3 to supply the power. Referring to Figure 3, the second power source 132-2 may be electrically connected to the second shaft-door control unit 112-2 and the first shaft-door control unit 112-1 positioned on the first shaft door 124-1 underneath the second shaft door 124-2 at which the second power sources 132-2 is positioned.

In another embodiment, the at least one of the second power sources 132-1, 132-2, 132-3 may be electrically connected to the at least one shaft-door control unit 112-1, 112-

2, 112-3 positioned at a shaft door, from among the plurality of shaft doors 124-1, 124-2, 124-3, above the shaft door at which the at least one of the second power sources 132-1, 132-2, 132-3 is positioned. Referring to Figure 4, the second power source 132-2 may be electrically connected to the second shaft-door control unit 112-2 and the thrid shaft-door control unit 112-3 positioned on the third shaft door 124-3 above the second shaft door 124-2 at which the second power sources 132-2 is positioned.

In yet another embodiment, as illustrated in Figure 5, the second power source 132-2 may be electrically connected to the second shaft-door control unit 112-2, the first shaft-door control unit 112-1, and the third shaft-door control unit 112-3. Herein, the first shaft-door control unit 112-1 is positioned on the first shaft door 124-1 above the second shaft door 124-2 at which the second power source 132-2 is positioned. Further, the third shaft-door control unit 112-3 is positioned on the third shaft door 124-3 above the second shaft door 124-2 at which the second power source 132-2 is positioned.

The second power source 132-1, 132-2, 132-3 may be actuated by the shaft-door control unit 112-1, 112-2, 112-3 at a floor to operate the at least one second lighting device 116, mounted at a shaft door corresponding to the floor, to the ON-state, when the elevator car 104 is displaced to a position in which the roof 120 of the elevator car 104 is adjacent to the shaft door. Further, the second power source 132-1, 132-2, 132-3 may be actuated by the shaft-door control unit 112-1, 112-2, 112-3 to the OFF-state, when the elevator car 104 is displaced, in the inspection mode, to a position in which the roof 120 of the elevator car 104 is adjacent to a shaft door above one of the shaft doors 124-1, 124-2, 124-3, 124-4 at which the at least one second lighting device 116 is mounted. Operational details of the lighting system in the inspection mode are explained in detail in the subsequent sections with respect to Figures 6 and 7.

Figure 6 illustrates a schematic view of the elevator shaft 102 depicting at least one second lighting device 116 mounted at one of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 in the ON-state, according to an embodiment of the present invention. Further, Figure 7 illustrates a schematic view of the elevator shaft 102 depicting at least one second lighting device 116 mounted on at one of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 in the OFF-state, according to an embodiment of the present invention. Referring to Figures 6 and 7, the at least one first lighting device 114 and the at least one second lighting device 116 are adapted to be operated based on at least the position of the elevator car 104 within the elevator shaft 102 in the inspection mode.

As shown in Figure 6, when the elevator car 104 is displaced to the third floor 101-

3, and the roof 120 of the elevator car 104 is moved to the position in which the roof 120 of the elevator car 104 is adjacent to the third shaft door 124-3. Herein, the roof 120 of the elevator car 104 may be aligned with a base of the third floor 101-3. Then, the shaft-door control unit 112-3 actuates the at least one second lighting device 116 positioned on the third shaft door 124-3 of the third floor 101-3, to ON-state for providing illumination. Further, the shaft-door control unit 112-3 provides an input indicative to the third shaft door 124-3 of the third floor 101-3, to open/unlock the third shaft door 124-3. Thus, an operator 200 may enter inside the elevator shaft 102 on the elevator car 104 to perform the maintenance tasks of the elevator unit 100. Once the maintenance operation is completed, the operator 200 may come out of the elevator shaft 102 and the third shaft-door control unit 112-3 to close the third shaft door 124-3 of third floor 101-3. After closing the third shaft door 124-3 of third floor 101-3, the at least one second lighting device 116 positioned on the shaft door of the third floor 101-3 is actuated to OFF-state as the elevator car 104 moves downwardly towards the second floor 101-2.

As shown in Figure 7, the elevator car 104 reaches at second floor 101-2 in the position in which the roof 120 of the elevator car 104 is adjacent to the second shaft door 124-2. Herein, the roof 120 of the elevator car 104 may be aligned with a base of the second floor 101-2. Then, the shaft-door control unit 112-2actuates the at least one second lighting device 116 positioned on the second shaft door 124-2 of the second floor 101-2, to ON- state for providing illumination. Further, the shaft-door control unit 112-2 provides the input indicative to the second shaft door 124-2 of the second floor 101-2, to open the second shaft door 124-2. Thus, the operator 200 may enter inside the elevator shaft 102 on the elevator car 104 to perform the maintenance tasks of the elevator unit 100. Once the maintenance operation is completed, the operator 200 may come out of the elevator shaft 102 and the second shaft-door control unit 112-2 close the shaft door 124-2 of second floor 101-2. After the closing of the second shaft door 124-2 of second floor 101-2, the at least one second lighting device 116 positioned on the second shaft door 124-2 of the second floor 101-2 is actuated to OFF-state as the elevator car 104 moves in a downward direction towards the first floor 101-1. This process may be repeated continuously until the maintenance operation is completed or the elevator unit is operated in the inspection mode.

Figure 8a illustrates a schematic view of at least one first lighting device 114 of the lighting system, mounted on the external portion of the floor 118 of the elevator car 104, according to an embodiment of the present invention. Figure 8b illustrates a schematic view of the at least one first lighting device 114 mounted on the external portion of the roof 120 of the elevator car 104, according to another embodiment of the present invention. Further, Figure 8c illustrates a schematic view of the at least one first lighting device 114 mounted on the external portion of the roof 120 of the elevator car 104, and on the external portion of the floor 118 of the elevator car 104, according to yet another embodiment of the present invention. Referring to Figures 8a, 8b, and 8c, the at least one first lighting device 114 of the lighting system mounted on the external portion of the elevator car 104. The at least one first lighting device 114 may be adapted to illuminate at least one of the elevator shaft 102 and the elevator pit 134 of the elevator unit 100 in the inspection mode. The lighting system may include a first power source 122 positioned on the elevator car 104. The first power source 122 may be electrically connected to the car control unit on the elevator car 104. In an embodiment, the first power source may be embodied as a part of the car control unit positioned on the external portion of the elevator car roof 104. Thus, the at least one first lighting device 114 may be electrically connected with the elevator car 104 to receive power. In an embodiment, the first power source 122 may be directly connected to the at least one first lighting device 114 for supplying the power to the at least one first lighting device 114. Upon receiving the power, the at least one first lighting device is adapted to continuously illuminate one of the elevator shaft 102 and the elevator pit 134 in the inspection mode. In an embodiment, the at least one first lighting device 114 may be embodied as a Light Emitting Diode (LED). The first lighting device 114 may interchangeably be referred to as the first lighting devices 114-1, 114-2.

Referring to Figure 8a, the first lighting device 114-1 may be mounted on the external portion of the floor 118 of the elevator car 104. Herein, the first lighting device 114-1 may be electrically connected with the first power source 122 to receive the power. In an embodiment, the first lighting device 114-1 may be mounted on the external portion of the floor 118 using adhesives. The adhesives may include, but are not limited to, glue, without departing from the scope of the present invention. In another embodiment, the first lighting device 114-1 is mounted on the external portion of the floor 118 using mechanical fasteners, without departing from the scope of the present invention. The mechanical fasteners may include, but are not limited to, screws or rivets, without departing from the scope of the present invention.

Referring to Figure 8b, the at least one first lighting device 114-2 may be mounted on the external portion of the roof 120 of the elevator car 104. Herein, the first lighting device 114-2 is also electrically connected with the first power source 122 to receive the power. In an embodiment, the first lighting device 114-2 may be mounted on the external portion of the roof 120 using adhesives. The adhesives may include, but are not limited to, glue, without departing from the scope of the present invention. In another embodiment, the first lighting device 114-2 is mounted on the external portion of the roof 120 using mechanical fasteners, without departing from the scope of the present invention. The mechanical fasteners may include, but are not limited to, screws or rivets, without departing from the scope of the present invention.

Referring to Figure 8c, the at least one first lighting device 114-1 may be mounted on the external portion of the floor 118 of the elevator car 104 and at least one first lighting device 114-2 is mounted on the external portion of the roof 120 of the elevator car 104. Herein, the first lighting devices are electrically connected to the first power source 122 to receive the power. In an embodiment, more than one first lighting devices 114-1 may be mounted on the external portion of the floor 118 of the elevator car 104 to provide illumination. In another embodiment, more than one first lighting devices 114-1 may be mounted on the external portion of the roof 120 of the elevator car 104 to provide illumination. Upon receiving the power from the first power source 122, the first lighting device 114 is adapted to be switched ON to provide illumination in the inspection mode. The first lighting device 114 remains switched ON during the inspection mode to provide continuous illumination in the elevator shaft 102 and/or the elevator pit 134 for performing the maintenance tasks.

For the sake of brevity, features of the lighting system and the elevator unit are already explained in detail in the description of Figure 1, Figure 2a-2b, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, and Figures 8a-8c. The present invention discloses a method of installing the lighting system in an elevator unit 100. The method may include installation of the at least one first lighting device 114 of the lighting system at the external portion of the elevator car 104 of the elevator unit 100, and the at least one first lighting device 114 is adapted to provide the illumination during the inspection mode of the elevator unit 100. Further, at step 204, the at least one second lighting device 116 of the lighting system may be installed within an elevator shaft 102, in proximity of each shaft door, from among the plurality of shaft doors 124-1, 124-2, 124-3, 124-4 of the building to provide the illumination during the inspection mode.

As would be gathered, the present invention offers the lighting system for the elevator unit 100 installed in a building having the plurality of floors 101-1, 101-2, 101-3, 101-4. The lighting system may illuminate the elevator shaft 102 and/or the elevator pit 134 on each floor 101-1, 101-2, 101-3, 101-4 from among the plurality of floors 101-1, 101-2, 101-3, 101-4 in the inspection mode. During the inspection mode, the at least one first lighting device 114 of the lighting system, mounted on the external portion of the elevator car 104 may continuously illuminate the elevator shaft 102 and/or the elevator pit 134. This provides effective illumination for the operator performing maintenance tasks within the elevator shaft. Further, the at least one second lighting device 116 of the lighting system is mounted in proximity of each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4, and is adapted to be actuated based on the position of the elevator car 104. Thus, one or more second lighting devices 116 mounted within the elevator shaft 102, may be in the ON-state during the inspection mode based on the position of the elevator car 104. This prevents the voltage drop and provides an effective illumination on each of the plurality of floors 101-1, 101-2, 101-3, 101-4 in the inspection mode.

The lighting system eliminates the need to switch ON all of the lighting devices together during the inspection mode (or leave all of them switched on at all times during inspection and normal operation mode), which minimizes the power consumption of the elevator unit. This reduces the overall maintenance cost of the elevator unit. Further, installing at least one second lighting device 116 is easy as the at least one second lighting device 116 is mounted in the proximity of the each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4. In comparison with the existing elevators, there is no need to measure a distance between two lighting devices for mounting on the elevator shaft. Each of at least one second lighting device 116 may be easily mounted in proximity of the each of the plurality of shaft doors 124-1, 124-2, 124-3, 124-4. Thus, the method of installing the at least one first lighting device 114 and at least one second lighting device 116 of the lighting system is easy to implement and less time-consuming, reducing the overall installation cost.

Therefore, the lighting system, the elevator unit 100, and the method of installing the lighting system of the present invention are efficient, easy in implementation, cost- effective, and convenient.

While specific language has been used to describe the present subject matter, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein. The drawings and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment.

Claims

1. A lighting system for an elevator unit (100) of a building having a plurality of floors (101-1, 101-2, 101-3, 101-4), the lighting system comprising: at least one first lighting device (114) mounted on an external portion of an elevator car (104) of the elevator unit (100) and adapted to illuminate at least one of an elevator shaft (102) and an elevator pit (134) of the elevator unit (100); and at least one second lighting device (116), preferably a plurality of second lighting devices (116), mounted within the elevator shaft (102) and in proximity of a plurality of shaft doors (124-1, 124-2, 124-3, 124-4) on each floor of the plurality of floors (101-1, 101-2, 101-3, 101 -4) of the building, wherein the at least one second lighting device (116) is adapted to illuminate the elevator shaft (102).

2. The lighting system according to claim 1, wherein the at least one, preferably each a, second lighting device (116) is mounted at one of a top portion (126) and a side periphery (130) of each of the plurality of shaft doors (124-1, 124-2, 124-3, 124-4).

3. The lighting system according to any of claims 1-2 further comprising: a first power source (122) electrically connected to the at least one first lighting device (114); and a plurality of second power sources (132-1, 132-2, 132-3), at least one of the second power sources (132-1, 132-2, 132-3), preferably each of the second power sources (132-1, 132-2, 132-3), is electrically connected to the at least one second lighting device (116), preferably to each a second lighting device (116).

4. The lighting system according to claim 3, wherein the first power source (122) is positioned in the elevator car (104) and each of the second power sources (132-1, 132-2, 132-3) is positioned at each of the plurality of shaft doors (124-1, 124-2, 124- 3, 124-4).

5. The lighting system according to any of claims 3-4, wherein each second lighting device (116) is electrically connected to each second power source (132-1, 132-2, 132-3) positioned at respective shaft doors (124-1, 124-2, 124-3, 124-4).

6. The lighting system according to any of claims 3-4, wherein at least one of the second power sources (132-1, 132-2, 132-3) positioned at a shaft door, from among the plurality of shaft doors (124-1, 124-2, 124-3, 124-4), is electrically connected to the at least one second lighting device (116) positioned on at least: the shaft door at which the second power source (132-1, 132-2, 132-3) is positioned, a shaft door, from among the plurality of shaft doors (124-1, 124-2, 124-3, 124-4), underneath the shaft door at which the second power source (132-1, 132-2, 132-3) is positioned, and a shaft door, from among the plurality of shaft doors (124-1, 124-2, 124-3, 124-4), above the shaft door at which the second power source (132-1, 132-2, 132- 3) is positioned.

7. The lighting system according to any of the claims 3-6, wherein each a second power source (132-1, 132-2, 132-3) is electrically connected to each a control unit positioned at each of the plurality of shaft doors (124-1, 124-2, 124-3, 124-4) and configured to control an operation of the respective second lighting device (116) via the respective second power source (132-1, 132-2, 132-3).

8. The lighting system according to claim 7, wherein at least one of the second power sources (132-1, 132-2, 132-3), preferably each a second power source (132-1, 132- 2, 132-3), is electrically connected to a shaft-door control unit (112’), preferably to each a shaft-door control unit (112’), from among a plurality of shaft-door control units (112-1, 112-2, 112-3), and adapted to be actuated to operate the at least one second lighting device (116), preferably each a, second lighting device (116), between an ON-state and an OFF-state.

9. The lighting system according to any of the preceding claims, wherein the at least one first lighting device (114) and the at least one second lighting device (116) are operated based on at least a position of the elevator car (104) within the elevator shaft (102).

10. The lighting system according to any of the claims 3-9, wherein: at least one of the second power sources (132-1, 132-2, 132-3), preferably each of the second power sources (132-1, 132-2, 132-3), is actuated by a, preferably each a, shaft-door control unit at a floor to operate the at least one second lighting device (116), mounted at a shaft door corresponding to the floor, to the ON-state, when the elevator car (104) is displaced to a position in which a roof (120) of the elevator car (104) is adjacent to the shaft door (124-1, 124-2, 124-3, 124-4).

11. The lighting system according to claim 10, wherein: at least one the second power sources (132-1, 132-2, 132-3), preferably each of the second power sources (132-1, 132-2, 132-3), is actuated by the, preferably each a, shaft-door control unit to the OFF-state, when the elevator car (104) is displaced to a position in which the roof (120) of the elevator car (104) is adjacent to a shaft door (124-1, 124-2, 124-3, 124-4) above one of the shaft doors (124-1, 124-2, 124-3, 124-4) at which the at least one second lighting device (116) is mounted.

12. The lighting system according to any of the preceding claims, wherein the at least one first lighting device (114) is mounted on the external portion of the roof (120) of the elevator car (104).

13. The lighting system according to any of the preceding claims, wherein the at least one first lighting device (114) is mounted on the external portion of the floor (118) of the elevator car (104).

14. The lighting system according to any of the preceding claims, wherein: the at least one first lighting device (114) is mounted on the external portion of the elevator car (104) using one of adhesives and mechanical fasteners, and/or the at least one second lighting device (116) is mounted, within the elevator shaft (102), at each of the plurality of shaft doors (124-1, 124-2, 124-3, 124-4) using one of adhesives and mechanical fasteners.

15. An elevator unit (100) comprising: an elevator shaft (102) having a plurality of shaft doors (124-1, 124-2, 124-3, 124-4) at each floor of a building; at least one shaft-door control unit disposed at each of the plurality of shaft doors (124-1, 124-2, 124-3, 124-4) for controlling an operation of respective shaft door (124-1, 124-2, 124-3, 124-4); at least one elevator car (104) adapted to displace within the elevator shaft (102); and the lighting system, according to any of claims 1-14, adapted to illuminate at least one of the elevator shaft (102) and an elevator pit (134).

16. A method (200) of installing of the lighting system, according to any of claims 1-14, in an elevator unit (100), the method comprising: installing (202) the at least one first lighting device (114) of the lighting system at an external portion of an elevator car (104) of the elevator unit (100) to illuminate at least one of an elevator shaft (102) and an elevator pit (134); and installing (204), within the elevator shaft (102), the at least one second lighting device (116) of the lighting system, wherein the at least one second lighting device (116) is installed in proximity of each shaft door, from among a plurality of shaft doors (124-1, 124-2, 124-3, 124-4) of a building, to illuminate the elevator shaft (102).