Patent Application
20250027326
The present specification relates generally to elevator apparatuses and methods and specifically to systems, devices, and methods for an elevator pit deck device.
Elevator maintenance often requires access to the elevator pit. Due to the great depth of the elevator pit, the use of a pit ladder is used to descend the elevator pit.
In accordance with an aspect, there is provided a deck device, including: a platform configured to move between a stored position and an operational position; the platform installable in a channel; the stored position being a folded or retracted configuration; the platform, when in the operational position, extending between a channel opening and a wall of the channel.
In some embodiments, the channel is an elevator hoistway, the channel opening connects the elevator hoistway and an elevator landing sill, the wall of the channel is proximate to a pit ladder, and the pit ladder is extendable towards a pit of the elevator.
In some embodiments, the platform is installed below an elevator car in the elevator hoistway.
In some embodiments, the platform, when unfolded, connects the elevator landing sill and the wall, the wall attached to the pit ladder; and wherein the foldable platform, when folded, functions as an elevator fascia.
In some embodiments, the platform is moved between the stored position and the operational position via remote control.
In some embodiments, the platform is moved between the stored position and the operational position via a key switch located outside the elevator.
In some embodiments, the platform is moved between the stored position and the operational position via a software application installed at an electronic device.
In some embodiments, the distance between the platform and the floor of the pit of the elevator is adjustable.
In some embodiments, activation of a control of the deck device disables operation of the elevator.
In accordance with an aspect, the deck device further includes: at least one light positioned near the perimeter of the platform; at least one guardrail positioned near the perimeter of the platform; a communications unit; a switch configured for controlling movement of the deck device via the communications unit; and an alarm unit.
In accordance with an aspect, there is provided a method for accessing a pit ladder, the method including: disabling operation of an elevator car in an elevator hoistway; and moving a platform of a pit deck device between a stored position and an operational position in the elevator hoistway; the stored position being a folded or retracted configuration that allows the pit deck device to function as an elevator fascia; the platform, when in the operational position, extending between an elevator landing sill and an elevator wall proximate the pit ladder.
In some embodiments, the platform is installed below the elevator car in the elevator hoistway.
In some embodiments, the platform is moved between the stored position and the operational position via remote control.
In some embodiments, the platform is moved between the stored position and the operational position via a key switch located outside the elevator.
In some embodiments, the platform is moved between the stored position and the operational position via a software application installed at an electronic device.
In some embodiments, the method further includes adjusting the distance between the platform and a floor of a pit of the elevator.
In some embodiments, disabling operation of the elevator car is by activation of a control of the deck device.
In some embodiments, the method further includes, while moving the platform between the stored position and the operational position: actuating at least one light positioned near a perimeter of the platform; and actuating an alarm.
In accordance with an aspect, an elevator pit deck system includes: an elevator hoistway; a pit ladder installable at a wall of the elevator hoistway; and a pit deck device configured to move between a stored position as an elevator fascia of the elevator hoistway and an operational position extending between the pit ladder and an elevator landing sill.
In some embodiments, the pit deck device comprises a communications unit configured to actuate movement of the pit deck device following receipt of a signal from a remote control, a switch, or a software application.
Other aspects and features according to the present application will become apparent to those ordinarily skilled in the art upon review of the following description of embodiments of the invention in conjunction with the accompanying figures.
The principles may better be understood with reference to the accompanying figures provided by way of illustration of an exemplary embodiment, or embodiments, incorporating principles and aspects of embodiments, and in which:
The description that follows, and the embodiments described therein, are provided by way of illustration of an example, or examples, of particular embodiments. These examples are provided for the purposes of explanation, and not of limitation. In the description, like parts are marked throughout the specification and the drawings with the same respective reference numerals. The drawings are not necessarily to scale and in some instances, proportions may have been exaggerated in order more clearly to depict certain features.
In many places, the pit ladder is required by elevator code and is installed in every elevator pit. Pit ladders are located within the elevator hoistway, on an inner wall adjacent to the landing sill. Existing pit ladders can be used on single slide doors. Due to the distance between the landing sill and pit ladder, a maintenance user may find reaching for the pit ladder when standing on the landing sill challenging. Access to elevator pits is necessary to do regular maintenance and inspections. Many existing pit ladders are located 24″-48″ and more from the open door on centre parting elevator doors, regardless of pit depth. This creates a fall hazard to the professionals entering and exiting hoist way and pits. Embodiments described herein can improve the ease of access to the pit ladder from the landing sill and can provide safe access to the existing pit ladder, reduce the required manpower, and eliminate exposed fall hazards while accessing the pit ladder.
Products available require a crew of two or more users; they are cumbersome; require storage when not in use; are time consuming to install; require storage; leave an exposed hazard; will not open doors even with barricades; and open the hoistway on multiple floors, leaving the public at risk. Users can be technicians, such as maintenance technicians or service or operations technicians.
As other examples, a drawing rope can be used that loops around one end of the pit ladder and draws the pit ladder close to and under the landing sill. A hooking rod to engage the pit ladder or a pit ladder with a cam and roller mechanism can be used. Alternatively, a user, while wearing a harness, can crawl along the walls adjacent to the landing sill, within the elevator hoistway, to reach the pit ladder. These methods are unsafe because users risk falling into the elevator pit while reaching for the pit ladder. Further, these methods are costly and inefficient because they require the entire elevator hoistway to be blocked off by a counterweight hire system which involves a minimum of two to three maintenance users and the use of two floors worth of space.
As shown, right side of pit deck device 600 does not have railings. For example, this is at the side that is oriented towards pit ladder such that the pit deck device 600 remains open to access th epit ladder. This can allow for a user to access the pit ladder. Left railings 613, 614, and 615 help prevent a user from falling off pit deck device 600.
Other embodiments of pit deck device will now be described in reference to pit deck device 400, but with modifications as described. In some embodiments, a self-contained unit providing safer access to a pit ladder is provided. According to some embodiments such as shown in
In the stored position of the platform, there is enough distance between the landing sill 407 and the elevator car such that the elevator is fully operational without the need to disassemble the pit deck device. Pit deck device 400 does not require additional external storage to house it. In the operational position of pit deck device, the platform 408 can be unfolded or extended. In the operational position, the platform 408 connects the landing sill 407 to the pit ladder. Duringn operation, the landing doors of the elevator can be maintained in a closed position and this can provide safety to the public while a user accesses the elevator pit. In some embodiments, the pit deck device 400 also includes perimeter safety lights located on and/or around or near the platform 408. The floor of the platform 408 may be constructed from steel with an anti-slip diamond plate atop or other suitable material. In some embodiments, the platform 408 has a rated capacity of 500 lbs and a 5:1 safety factor. In some embodiments, the platform 408 has a rated capacity of 1000 lbs and a 5:1 safety factor. In some embodiments, the platform 408 has a different rated capacity and safety factor. In some embodiments, the pit deck device 400 also includes guardrails 411, 410, 409 along the perimeter of the platform 408 and this can help prevent a maintenance user from falling off the platform into the elevator pit. The dimensions of the pit deck device 400 can be configured based on the size of the landing door of the elevator. In some embodiments, the pit deck device 400 also includes one or more safety switches that when activated, prevent the elevator car from moving up and down the elevator hoistway.
In some embodiments, as shown in
In some embodiments, as shown in
Second, the user unfolds the pit deck device 400. This can be following close of the elevator doors partway, such as with a 100 cm opening. The unfolding of the pit deck device 400 can be via the use of a remote control or a key switch located in the hallways, external to the elevator, or by setting a virtual pit deck switch in a software application in the “up” direction. A signal is sent such as via a wireless or Bluetooth communication system or other communication system and, the pit deck device 400 moves from its stored position to its operational position. The pit deck device 400 is unfolded from its stored position to its operational position, according to some embodiments. As the pit deck device 400 unfolds, in some embodiments, a red flashing light 412 will be activated and/or an audible alarm sounds. The pit deck device 400 also includes a safety switch, which is connected to the elevator safety circuit, that disables the operation of the elevator during the unfolding of the pit deck device, according to some embodiments.
Third, once the pit deck device 400 is in the operational position (e.g., completely unfolded), the red flashing light 412 stops and a continuous green light is activated in its place. This can signal to the user that the pit deck device is safe for use. The user may walk with both feet on the platform 408 of the pit deck device 400 towards the pit ladder and may utilize the guardrails (end railings and/or left railings) to afford themselves greater stability while travelling along on the platform 408 of the pit deck device 400. The user can secure a non-ladder end rail from the pit deck device before walking on the pit deck.
The user can secure their harness to a lanyard or other safety mechanism before entering the elevator pit or walking on the pit deck. For example, a lanyard can be lowered from the anchoring floor (e.g., the floor above the first floor) containing a counterweight hire system (an anchoring system), as shown in
The user can then close the landing doors, utilize the pit deck device to reach the pit ladder, and descend the pit ladder into the elevator pit. As desired, the pit deck device 400 can be lowered or raised, such as by use of pit deck controls (e.g., remote or physical switch at the pit deck), and this can allow for the user to access and work in shallower pits.
Once the user wishes to complete pit access, the user can use the pit ladder to ascend the elevator hoistway onto the pit deck device 400, open the landing doors, and position themselves on the landing sill. Subsequently, the user can close the landing doors to a distance apart (e.g., 100 cm apart), and then trigger the pit deck device to fold back into its stored position, via the use of a remote control or the key switch located in the hallways, external to the elevator, or by setting a virtual pit deck switch in a software application in the “down” direction. Other means of pit deck device 400 control can be used. As the pit deck device 400 folds back to its stored position, a red flashing light flashes, and and alarm sounds, according to some embodiments. Lights 412 can be configured at a location other than as shown in
In some embodiments, such as for operations where more than one user is desirable, the pit deck device 400 can be restored (put into its operational mode) and the elevator lowered for maintenance such as on roller guides or safety gear.
In some embodiments, pit deck device 400 mitigates potential safety issues by providing safer access to the pit ladder for the users; reduces potential safety issues for the public; allowing for key operation and an ability to provide audible and/or visual feedback to the operator; having safety mechanisms to disable the elevator connected; providing handrails while in a working position; and providing lighting. In some embodiments, pit deck device 400 has an increased case of use and is a self-contained unit, is user friendly, can be remote controlled, and can be operated from within the pit and/or a hall key switch. In some embodiments, pit deck device reduces costs and does not require expensive storage or space in a building and can operate on a low voltage (e.g., 24 volts). In some embodiments, pit deck device 400 reduces the labour and number of users needed. For example, pit deck device 400 can be operated by only one user in order to access a pit ladder and the pit, allowing for fewer people to be needed to complete the job under safe conditions.
In some embodiments, pit deck device 400 can be used and interoperate with other devices and in other use cases other than deep pit access in an elevator. As used herein, a pit deck device 400 can be referred to as a deck device with modification such as to allow the deck device to operate similarly in a use case other than in the use case described.
In some embodiments, pit deck device 400 further includes a secondary retractable platform configured below the platform 408. This secondary platform is configured to be manually activated by elevator mechanics. The secondary platform is spring loaded to move in the up direction and manually deactivated such as with a steel push bar or rod. The secondary platform is operably connected to a safety switch that is configured to disable the elevator in the up position. This secondary platform is configured to aid in the initial assembly and provide safe access to elevator mechanics for regular maintenance and repairs. The secondary platform is not included in some embodiments. For example, the secondary platform may be used in deep pits (e.g., 10 feet to 25 feet). Most elevator companies have a no ladder policy in place whether it is working in pits or on top of the elevator. Such policies do not provide for a solution. The secondary platform is configured to provide a safe mechanism for facilitating maintenance. For example, the secondary platform can be used to facilitate installations, maintenance, repairs, and inspections by the TSSA.
Various embodiments have been described in detail. Changes in and or additions may be made.
