Patent Application
20190241401
Exemplary embodiments pertain to the art of elevator systems. More particularly, the present disclosure relates to installation and maintenance of elevator systems.
Elevator systems are useful for carrying passengers, cargo, or both, between various levels in a building. Some elevators are traction based and utilize load bearing members such as belts for supporting the elevator car and achieving the desired movement and positioning of the elevator car.
In installation of some elevator systems, a scaffold is used to install components in the hoistway, such as rails, controllers and the like. Then, the elevator car and load bearing members are installed thus completing installation of the elevator system. With high rise systems, in particular, installation and use of scaffolding for elevator system component installation in the hoistway can be cumbersome and inefficient.
In other configurations, the drive system of the elevator system, such as the machine and the load bearing members are installed in the hoistway and connected to the elevator car. The elevator car, or a dedicated installation car, are utilized as an installation platform to install the remaining components in the hoistway. Starting at the bottom, or alternatively the top, of the hoistway, components such as rail sections are installed from the installation platform at a first location. The installation platform is then moved along the hoistway via the machine and load bearing members to this first location and the elevator system components are installed at a second location from the installation platform. This movement and installation continues along the hoistway.
The installation mechanics conduct operations such as welding and grinding at the installation platform to install rails and other components. With such operations taking place in close proximity to the load bearing members, the load bearing members are exposed to, for example, weld slag, concrete debris, and other construction materials that can damage the load bearing members.
In one embodiment, a protective cover for a load bearing member of an elevator system includes a sleeve wrapped around a perimeter of the load bearing member, the sleeve configured to protect the load bearing member from debris damage during installation or maintenance operation of the elevator system, and configured to slide along a length direction of the load bearing member. A tether is configured to connect the sleeve to a working platform.
Additionally or alternatively, in this or other embodiments a closure secures the sleeve at the load bearing member.
Additionally or alternatively, in this or other embodiments the closure is one of a hook and loop fastener, a button, a snap, a magnet, or a tie.
Additionally or alternatively, in this or other embodiments the sleeve is formed of a non-flammable fabric.
Additionally or alternatively, in this or other embodiments the tether includes a breakaway feature.
Additionally or alternatively, in this or other embodiments the breakaway feature is a breakaway buckle.
In another embodiment, an elevator system includes a hoistway, an elevator car located in the hoistway, an elevator load bearing member operably connected to the elevator car to suspend and/or drive the elevator car along the hoistway, and a guide rail installed in the hoistway to guide movement of the elevator car along the hoistway. A protective cover for the load bearing member includes a sleeve wrapped around a perimeter of the load bearing member. The sleeve is configured to protect the load bearing member from debris damage during installation or maintenance operation of the elevator system, and configured to slide along a length direction of the load bearing member. A tether is configured to connect the sleeve to the elevator car.
Additionally or alternatively, in this or other embodiments a closure secures the sleeve at the load bearing member.
Additionally or alternatively, in this or other embodiments the closure is one of a hook and loop fastener, a button, a snap, a magnet, or a tie.
Additionally or alternatively, in this or other embodiments the sleeve is formed of a non-flammable fabric.
Additionally or alternatively, in this or other embodiments the tether includes a breakaway feature.
Additionally or alternatively, in this or other embodiments the breakaway feature is a breakaway buckle.
Additionally or alternatively, in this or other embodiments the breakaway feature disconnects the sleeve from the elevator car as a result of a tether tension exceeding a threshold.
Additionally or alternatively, in this or other embodiments the load bearing member is a belt.
In yet another embodiment, a method of performing installation or maintenance on hoistway components for an elevator system includes installing a sleeve around a portion of a load bearing member of an elevator system, connecting the sleeve to a working platform via a tether, and performing one or more installation or maintenance operations at a first hoistway location via the working platform. The sleeve protects the load bearing member from damage from the one or more installation or maintenance operations.
Additionally or alternatively, in this or other embodiments the working platform is moved from the first hoistway location to a second hoistway location, and the sleeve is moved along the load bearing member via the tether connection between the sleeve and the working platform.
Additionally or alternatively, in this or other embodiments a connection of the sleeve to the working platform is broken by a breakaway element disposed at the tether.
Additionally or alternatively, in this or other embodiments the one or more installation or maintenance operations include one or more of welding or grinding.
Additionally or alternatively, in this or other embodiments the sleeve is formed from non-flammable material.
The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
Shown in
The belts 16 are constructed to meet belt life requirements and have smooth operation, while being sufficiently strong to be capable of meeting strength requirements for suspending and/or driving the elevator car 14 and counterweight 22. Further, while the description herein utilizes the term “belt”, one skilled in the art will readily appreciate that the present disclosure may be readily applied to other configurations of load bearing members, such as ropes.
The belt 16 has a belt width 26 and a belt thickness 32, with an aspect ratio of belt width 26 to belt thickness 32 greater than one. The belt 16 further includes a back side 34 opposite the traction side 30 and belt edges 36 extending between the traction side 30 and the back side 34. While five tension members 24 are illustrated in the embodiment of
Referring now to
Referring again to
Referring now to
Utilizing the working platform, the technician installs/repairs guide rails 60, rail brackets 62 and/or other hoistway components along a first hoistway portion 66. Once completed, the elevator car 14 is moved to the first hoistway portion 66 utilizing the guide rails 60 installed. The technician may then install guide rails 60, rail brackets 62 and/or other hoistway components at a second hoistway portion 68 above the first hoistway portion 66. The elevator car 14 may then be moved to the second hoistway portion 68. This process is repeated upward along the hoistway.
During installation/maintenance of the guide rails 60, rail brackets 62 and/or other hoistway components, the technician may perform processes such as welding or grinding which produce debris such as slag, chips, sparks, and the like, that may damage the belts 16, which are in close proximity to the work being performed. Referring now to
In elevator systems 10 with multiple belts 16, such as shown in
The belt sleeve 70 further includes a breakaway feature, such as a breakaway buckle 76 along the tether 74. If the tension on the tether 74 increases to above a threshold, the breakaway buckle 76 will open, thus severing the tether connection between the belt sleeve 70 and the elevator car 14. Utilizing a breakaway feature such as the breakaway buckle 76 prevents damage to the belts 16 during the installation process if, for example, the belt sleeve 70 resists sliding along the belt 16 or if a force is applied to the tether 74 increasing its tension.
The belt sleeve 70 disclosed herein provides protection to the belts 16 during installation and/or maintenance of hoistway components. The belt sleeve 70 aids in ensuring the robust quality and life expectancy of the belt 16 by preventing damage to the belt 16 from processes such as welding or grinding in the hoistway that causes premature belt failure and costly belt replacements. The location of the guide rails 60 can vary depending on the layout of the elevator system. Therefore the belt protection needs to be flexible, adjustable and easy to apply. The belt sleeve 70 disclosed herein fits a wide range of belt sizes, can be utilized with a wide variety of elevator system layouts and configurations. Further, the belt sleeve 70 is configured to move along the belt 16 and is easy to install at the belt 16.
The term “about” is intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, element components, and/or groups thereof.
While the present disclosure has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this present disclosure, but that the present disclosure will include all embodiments falling within the scope of the claims.
