EP3943432A1 - Aufzugskabine mit faltbarer arbeitsplattform - Google Patents

Aufzugskabine mit faltbarer arbeitsplattform Download PDF

Info

Publication number: EP3943432A1
Authority: EP; European Patent Office
Prior art keywords: working platform; elevator car; arm member; connection plate; stowed position
Prior art date: 2020-07-23
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP20305845.8A

Other languages

English (en)

French (fr)

Other versions

EP3943432B1 (de

Inventor

Romain Marechal

Joachim ANGOULEVANT

Guillaume MONTIGNY

Frédéric BEAUCHAUD

Arnaud CAZÉ

Emmanuel CONVARD

Juan Quiles Manzanas

Agustin JIMENEZ-GONZALEZ

Aurélien FAUCONNET

Michael Rigot

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Otis Elevator Co

Original Assignee

Otis Elevator Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2020-07-23

Filing date

2020-07-23

Publication date

2022-01-26

2020-07-23 Application filed by Otis Elevator Co filed Critical Otis Elevator Co

2020-07-23 Priority to ES20305845T priority Critical patent/ES2966104T3/es

2020-07-23 Priority to EP20305845.8A priority patent/EP3943432B1/de

2022-01-26 Publication of EP3943432A1 publication Critical patent/EP3943432A1/de

2023-12-06 Application granted granted Critical

2023-12-06 Publication of EP3943432B1 publication Critical patent/EP3943432B1/de

Status Active legal-status Critical Current

2040-07-23 Anticipated expiration legal-status Critical

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
- B66B11/0226—Constructional features, e.g. walls assembly, decorative panels, comfort equipment, thermal or sound insulation
- B66B11/0246—Maintenance features

Definitions

This disclosure relates to an elevator car with a foldable working platform used to carry out maintenance from inside an elevator car.
the foldable nature of the working platform is assisted by one or more extendable suspension arrangements.
the range of movement of a scissor mechanism is limited by the dimensions of the working platform to which the mechanism is attached. Even employing telescopic arms in the scissor mechanism, the dimensions of the working platform can place constraints on its range of movement. This can be an issue for smaller elevator cars where the footprint of the working platform is reduced. However, the height of the working platform when it is deployed is important for ensuring that a maintenance person can access components above the ceiling of the car and also take refuge in the elevator car in an emergency.
an elevator car defining an interior space for accommodating passengers and/or cargo, the elevator car comprising:
an extendable suspension arrangement which has both a long extension height and a compact footprint (i.e. in the plane of the working platform).
a second end of the first arm member is adjacent to a second end of the second arm member, providing a long extension height of the suspension arrangement, thereby allowing the working platform to be lowered to the desired height.
the first arm member and the second arm member slide parallel to each other relative to the connection plate.
the first end of the first arm member is adjacent the second end of the second arm member, and the first end of the second arm member is adjacent the second end of the second arm member. Due to the offset perpendicular to the sliding direction, the first arm member and the second arm member are able to slide into this "stacked" configuration, thereby providing a compact arrangement.
first connection point and the second connection point additionally have another offset from one another along the sliding direction. This helps to further increase the length of the extendable suspension arrangement when in the "extended” position, the position of the extendable suspension arrangement when the working platform is in the operational position.
the extendable suspension arrangement will expand or collapse.
the extendable suspension arrangement may be able to collapse down into a relatively compact configuration.
the first arm member may be pivotably connected to the first connection point of the connection plate and/or the second arm member may be pivotably connected to the second connection point of the connection plate.
the first and second arm members may slide parallel to one another and pivot so as to bring the sliding direction into alignment with the working platform, the extendable suspension arrangement collapsing down to lie close to the working platform in the stowed position. In other words, the sliding direction may move relative to the connection plate.
connection plate comprises a pivot point, arranged such that the connection plate rotates about the pivot point when the working platform moves between the stowed position and the operational position.
the connection plate rotates about the pivot point when the working platform moves between the stowed position and the operational position.
the extendable suspension arrangement may collapse down to lie close to the working platform in the stowed position.
the connection plate rotates about the pivot point to bring the first arm member and the second arm member into alignment with the working platform and/or the support frame when the working platform moves to the stowed position.
the pivot point is located centrally between the first connection point and the second connection point.
the extendable suspension arrangement may therefore extend and collapse in a symmetrical way.
the sliding direction is constant with respect to the connection plate.
the first connection point and the second connection point are part of the connection plate i.e. they are fixed relative to the connection plate.
the first connection point and the second connection point are arranged to define the sliding direction, thus giving a sliding direction which is constant with respect to the connection plate.
the sliding direction will also rotate with the connection plate. This arrangement helps the "stacked" first and second arm members to rotate to a substantially horizontal position, thereby providing an extendable suspension arrangement with a particularly small vertical extension, when the working platform is in the stowed position.
the working platform in the stowed position and the support frame are both located above the interior space. In some examples, the working platform in the stowed positon is at least partially overlapping with the support frame. In the stowed position the working platform may sit within the support frame.
the first connection point comprises a first projection and the first arm member comprises a slot, and the first projection is configured to slide in the slot.
the slot extends along substantially the entire length of the first arm member. This helps to maximise the height of the extendable suspension arrangement in the fully extended position.
the connection plate further comprises a second projection, also configured to slide in the slot of the first arm member. This helps to improve the stability of the suspension arrangement, and to keep the first and second arm members sliding parallel to each other. This arrangement of two projections also defines the sliding direction for each respective arm.
connection point may comprise a first projection and the second arm member may comprise a slot, and the first projection is configured to slide in the slot.
slot extends along substantially the entire length of the second arm member.
connection plate further comprises a second projection, also configured to slide in the slot of the second arm member.
the first arm member is connected at a first end to the support frame and the second arm member is connected at a first end to the working platform.
the first end of the first arm member is connected to the support frame at a corner of the support frame.
the first end of the second arm member is connected to a corner of the working platform.
the corner of the support frame is an opposite corner to the corner of the working platform.
the elevator car comprises a first extendable suspension arrangement and a second extendable suspension arrangement, wherein the first extendable suspension arrangement suspends the working platform from a first side of the support frame, and wherein the second extendable suspension arrangement suspends the working platform from a second, opposing side of the support frame.
the working platform is stably suspended by a pair of extendable suspension arrangements extending from opposite sides of the support frame.
the first extendable suspension arrangement further comprises:
the elevator car further comprises a cover panel, which is configured to cover the working platform when the working platform is in the stowed position.
the cover panel may, for example, comprise a decorative ceiling cover panel.
the cover panel may be pivotably attached to the support frame. In such examples, the cover panel may pivot relative to the support frame to cover the working platform when the working platform is in the stowed position.
the elevator car further comprises a counterforce generator configured to provide a counterforce, and a tension member, connected to the working platform and to the counterforce generator, so as to transmit the counterforce and thereby hoist the working platform from the operational position to the stowed position.
a counterforce generator configured to provide a counterforce
a tension member connected to the working platform and to the counterforce generator, so as to transmit the counterforce and thereby hoist the working platform from the operational position to the stowed position.
an elevator car defining an interior space for accommodating passengers and/or cargo
the elevator car comprising: a support frame positioned above the interior space; a working platform suspendably connected to the support frame and moveable between a stowed position, above the interior space, and an operational position, suspended within the interior space; a counterforce generator configured to provide a counterforce in an upwards vertical direction; and a tension member connected to the working platform and to the counterforce generator so as to transmit the counterforce and thereby hoist the working platform in the upwards vertical direction.
a counterforce generator and a tension member act together to assist in moving the working platform from the operational position to the stowed position, thereby providing improved handling of the working platform.
a maintenance person does not need to push against the full weight of the working platform when returning the working platform to the stowed position i.e. the maintenance person does not need to apply a sufficiently large upwards force to overcome the whole weight of the working platform.
the working platform weighs 30 kg but the counterforce generator provides a counterforce equivalent to 25 kg, then a maintenance person only needs to lift the equivalent of 5 kg to move the working platform from the operational position to the stowed position.
the counterforce generator combined with the tension member provides an advantage not only in assisting the upwards movement of the working platform from the operational position to the stowed position, but also in improved handling when moving the working platform from the stowed position to the operational position.
the counterforce in the upwards vertical direction acts against the weight of the working platform and any force applied by a maintenance person, so that it damps the motion of the working platform as it moves downwards from the stowed position to the operational position, preventing the working platform from suddenly dropping down from the stowed positon. This is advantageous since a sudden drop of the working platform could cause damage to a mechanism suspending the working platform and could cause harm to a maintenance person operating the working platform.
the counterforce is slightly larger than the weight of the working platform. This means that the counterforce generator and tension member can act to automatically hoist the working platform to its stowed position in the absence of any weight being applied by a maintenance person.
the counterforce is approximately equal to the weight of the working platform. This means that the weight of the working platform is approximately balanced by the counterforce such that the maintenance person need only apply a small force to move the working platform from the stowed position to the operational position, or from the operational position to the stowed position.
the counterforce generator is a hoisting device and the tension member is arranged such that a suspending portion of the tension member suspends the working platform, wherein the hoisting device is configured, when actuated, to alter the length of the suspending portion, so as to hoist the working platform between the stowed position and the operational position.
the hoisting device is configured, when actuated, to alter the length of the suspending portion, so as to hoist the working platform between the stowed position and the operational position.
the tension member is a flexible member, for example a flexible rope, cable or belt.
the counterforce generator is positioned at the working platform.
the location of the hoisting device at the working platform is advantageous since a maintenance person is able to easily access the hoisting device from inside the elevator car, even when the working platform is in the stowed position, and thus deployment of the working platform is both easy and convenient for the maintenance person.
the hoisting device is attached to the working platform.
the hoisting device is attached to an underside of the working platform. This allows the hoisting device to be stored discreetly and prevents the hoisting device from taking up useful space on the working platform or within the elevator car, whilst also being very easily accessible to a maintenance person from within the elevator car.
the tension member may be arranged to pass through or round the working platform to connect to the counterforce generator.
the tension member could undersling the working platform.
the tension member may be indirectly connected to the working platform by virtue of being connected to the hoisting device which is itself attached to the working platform.
the tension member connects the counterforce generator to a connection point which moves relative to the working platform as the working platform is moved between the stowed position and the operational position.
connection point may be a fixed point in the elevator car, for example a connection point on the support frame, or a connection point on a wall or ceiling of the elevator car.
the tension member is connected to a connection point which moves relative to the working platform as the working platform is moved between the stowed position and the operational position.
the tension member may be connected to the extendable suspension arrangement e.g. to the connection plate of the suspension arrangement.
the length of the suspending portion will be reduced by twice as much, compared to the case in which the tension member is connected to the support frame, because of the action of the suspension arrangement, and this therefore provides an improved roping arrangement.
This arrangement is particularly well suited for small elevator cars and furthermore the cost of the spring element required for this arrangement is reduced, since a reduced stroke is required.
the counterforce generator maintains the suspending portion of the tension member at a given length, unless actuated by the application of a force i.e. the hoisting device is self-locking. This helps to improve the safety of the working platform, since this means that whenever a maintenance person has been moving the working platform using the hoisting device, and then ceases to actuate the hoisting device, the working platform will remain stationary at the height to which it had been moved, and will not begin to rise up, or fall down independently i.e. of its own accord. If the maintenance person stops the actuation then the hoisting device will lock in its current position, so that the risk of the working platform freefalling is significantly reduced.
the elevator car may still be desirable for the elevator car to include a locking means for the working platform at least in the stowed position, e.g. for increased peace of mind and a safety back-up.
the counterforce generator comprises at least one deflector such as a deflection sheave, and the tension member is arranged to pass over the at least one deflector.
the tension member could be arranged in a 1:1 roping ratio with the counterforce generator, such that the length of rope which is hoisted e.g. wound or gathered, by the counterforce generator is equal to the change in length of the suspending portion of the tension member.
the tension member is arranged in a higher roping ratio with the counterforce generator, for example a 2:1 roping arrangement, a 3:1 roping arrangement, or a 4:1 roping arrangement.
counterforce generator comprises at least one deflector
the tension member is arranged to pass over the at least one deflector in a 3:1 roping arrangement.
the deflector(s) are arranged such that for one unit of movement of the counterforce generator, the suspending portion of the tension member is altered in length three times as far.
the length of the tension member provides sufficient excess such that the suspending portion of the tension member can be lengthened to greater than the length required to reach the operational position i.e. allowing the tension member to go slack when the working platform is in the operational position.
This helps to provide an arrangement in which the tension member is not required to bear the full weight of the working platform and any additional load e.g. of a maintenance person, when the working platform is in use in the operational position. This means that a smaller, lower load bearing tension member could potentially be used, and also helps to reduce wear and strain on the tension member.
the elevator car comprises a first tension member and a second tension member, each of the first and second tension members connected independently to the counterforce generator and to the working platform. This provides for redundancy in case of failure of one of the tension members.
the elevator car comprises a first tension member arranged at a first side of the working platform and a second tension member arranged at a second side of the working platform, wherein the second side is an opposing side of the working platform to the first side.
This provides a more balanced suspending force acting on the opposing sides of the working platform, such that each of the opposing sides is lifted by the counterforce generator approximately equally, allowing the working platform to remain approximately level as it is moved between the operational position and the stowed position and thereby providing smooth movement of the working platform.
the counterforce generator comprises at least one counterweight and the tension member is fixed at one end to the at least one counterweight and connected to the working platform such that, as the at least one counterweight moves downwards vertically relative to the elevator car, the working platform is hoisted from the operational position to the stowed position i.e. in the upwards vertical direction. This therefore provides an assistive upwards force as a maintenance person lifts the working platform to the stowed position, due to the lowering of the counterweights.
the tension member may be fixed at one end to a counterweight and arranged to pass under the working platform i.e. to undersling the working platform, with its other end fixed to a suitable connection point in the car, such that as the counterweights travel vertically downwards the working platform is hoisted vertically upwards.
the tension member is fixed at one end to the at least one counterweight and fixed at another end to the working platform i.e. in a 1:1 roping arrangement. This advantageously provides a simple arrangement of the tension member capable of hoisting the working platform as the at least one counterweight moves downwards.
the elevator car comprises one or more deflection sheaves and the tension member is arranged to pass over the one or more deflection sheaves between the at least one counterweight and the working platform. This advantageously reduces the risk of the tension member coming into contact with, or interfering with, any of the other components present within the elevator car. This also helps with designing a suitable layout for the counterforce generator in the elevator car, for example with the counterweight(s) positioned at a periphery of the interior space.
the at least one counterweight is configured to move within a surrounding structure. This advantageously provides a separation between the at least one counterweight and any other components present in the elevator car, and thereby reduces the risk of the counterweights contacting, or interfering with, any of the other components.
the surrounding structure may be arranged within the interior space or outside the interior space, for example in or behind any walls of the elevator car.
the elevator car comprises a first counterweight arranged on a first side of the working platform, and connected to the working platform by a first tension member, and a second counterweight arranged on a second side of the working platform, wherein the second side is an opposing side of the working platform to the first side, and connected to the working platform by a second tension member.
the counterforce generator comprises at least one spring element and the spring element is arranged to be compressed as the working platform is moved from the stowed position to the operational position, and thereby provide the counterforce acting to move the working platform from the operational position to the stowed position i.e. in the upwards vertical direction.
the hoisting device may be any suitable device which is able to alter the length of the suspending portion as described, i.e. the hoisting device is a device which is configured to gather in (or out) or wind in (or out) the length of the tension member, so as to alter the length of the suspending portion.
the hoisting device may, for example, comprise an electrical motor arranged to wind the tension member around a collector (such as a drum).
the hoisting device may comprise a gas spring arranged to alter the length of the suspending portion.
the hoisting device may comprise a reduction gear assembly, or any other suitable mechanical device operable to alter the length of the suspending portion. In any of these examples, the hoisting device may be operated automatically or manually.
the hoisting device is rotationally driven to alter the length of the suspending portion e.g. thereby acting to hoist the working platform between the stowed position and the operational position.
This allows rotational motion (applied automatically or by a maintenance person) to be converted into a relative shortening (or lengthening) of the suspending portion of the tension member, which thereby results in the working platform being lifted towards the stowed position, or lowered towards the operational position.
the hoisting device comprises a worm screw and a sliding member configured to slide along the worm screw when the worm screw is rotationally driven.
the tension member is connected to the sliding member, such that when the sliding member moves the length of the suspending portion is altered. For example, as the worm screw is rotated, the sliding member moves the tension member and alters the length of the suspending portion.
the tension member is connected to the sliding member via one or more deflectors.
the deflectors may be deflection sheaves, for ease of running of the tension member.
the one or more deflectors are arranged to at least partially wind up the tension member as the sliding member moves in a first direction, thereby shortening the length of the suspending portion.
the sliding member may be a worm gear in at least some examples. An end of the tension member may terminate at the sliding member.
the sliding member may comprise a hole, sized to receive the worm screw.
the hole may comprise a plastic ring.
the plastic ring may be self-lubricating.
the hoisting device may further comprise an elongate rod, parallel to the worm screw and arranged to pass through the sliding member, wherein the sliding member is configured to slide along the elongate rod. This helps to provide stability to the hoisting device.
the pitch angle of the worm screw is 8 mm or less. This helps to make the worm screw self-locking at small increments of movement, such that the worm screw (hence the sliding member and therefore the working platform) will not move unless further force is applied to the worm screw to alter the length of the suspending portion again.
the hoisting device may be driven directly, e.g. using a motor as a rotational drive.
the motor may be operated automatically or manually.
the motor may be provided by a drill that is manually operated to drive the hoisting device (e.g. using a drill to turn the worm screw in some examples). The use of a drill reduces the exertion required by the maintenance person.
the hoisting device may be driven indirectly, e.g. using a crank connected to a rotating drive shaft.
the hoisting device may further comprise a crank arranged to drive rotation of the worm screw.
the crank may not be a permanent part of the hoisting device, but rather may be a separate tool stored at a location within the elevator system, for example under the working platform or in a cabinet on a landing floor of the elevator system.
a crank provides a simple mechanism by which a maintenance person is able to actuate the hoisting device, in particular when standing in the elevator car below the working platform.
the use of a crank is advantageous since cranks are often provided as a standard elevator maintenance tool and are often stored within the elevator car and hence are likely to be easily accessible to a maintenance person.
the crank is connected to a rotating drive shaft at 90°. However, it has been recognised than when a person is standing below the working platform to operate the crank, it may be desirable for the crank to extend at an angle of more than 90°. This means that the crank does not hang down and potentially hit a user, as well as making it easier to operate.
the crank is arranged to extend at an angle of between 120° and 150° from the axis defined by the worm screw, and optionally at an angle of around 135°. This helps to protect the technician from harm and provides a good angle of approach for operating the crank.
the hoisting device may comprise a bracket arranged to limit the angle at which the crank extends.
the hoisting device may be manually actuatable. This means that a maintenance person can autonomously control the raising and/or lowering of the working platform.
an elevator system comprising an elevator car according to any of the examples disclosed herein, further comprising a main counterweight and one or more ropes or belts connected between the elevator car and the main counterweight.
Figure 1 shows an elevator car 1 which defines an interior space 2, which is suitable for accommodating passengers and/or cargo.
the elevator car 1 includes a support frame 4 which is positioned above the interior space 2.
the elevator car 1 also includes a working platform 6, which is moveable between a stowed position (as shown in Figure 4 ), above the interior space 2, and an operational position, within the interior space 2, as is seen in Figure 1 .
the working platform 6 is suspended by a first extendable suspension arrangement 8a and a second extendable suspension arrangement 8b, which, as shown, are on opposite sides of the elevator car 1 and opposite sides of the working platform 6.
each extendable suspension arrangement 8a, 8b includes two connection plates 10a, 10b, 10c, 10d.
One of the connection plates 10b, 10c is on the inner side of the suspension arrangements 8a, 8b i.e. closer to the working platform 6, and the other connection plate 10a, 10d is on the outer side of the extendable suspension arrangement i.e. further from the working platform 6.
Each connection plate 10a, 10b, 10c, 10d is slidably connected at a respective first connection point 16a, 16b, 16c, 16d to a respective first arm member 12a, 12b, 12c, 12d.
Each first arm member 12a, 12b, 12c, 12d is connected at a first end 3a, 3b, 3c, 3d to the support frame 4.
each connection plate 10a, 10b, 10c, 10d is slidably connected at a respective second connection point 18a, 18b, 18c, 18d to a respective second arm member 14a, 14b, 14c, 14d.
Each second arm member 14a, 14b, 14c, 14d is connected at another first end (i.e. a first end of the second arm member) 5a, 5b, 5c, 5d to the working platform 6.
FIG. 2 A side view of some of the elevator car components, showing the extendable suspension arrangement 8a, but omitting the outer structure of the elevator car 1, is shown in Figure 2 .
the features described herein with reference to the extendable suspension arrangement 8a apply likewise to extendable suspension arrangement 8b, although the corresponding reference numerals have been omitted.
the pair of suspension arrangements 8a, 8b (on the left and right) are arranged to suspend the working platform 6 from the support frame 4 in the operational position seen in Figure 2 .
each of the first arm members 12a, 12b comprises a slot 20a, 20b and each of the second arm members 14a, 14b comprises a slot 22a, 22b.
Each slot 20a, 20b, 22a, 22b extends along substantially the entire length of the first arm member 12a, 12b and the second arm member 14a, 14b respectively.
Each connection plate 10a, 10b includes a first projection 16a, 16b (providing a first connection point) and a second projection 24a, 24b both configured to slide in the slots 20a, 20b of the first arm members 12a, 12b.
each connection plate 10a, 10b includes another first projection 18a, 18b (providing a second connection point), and another second projection 26a, 26b and both configured to slide in the slots 22a, 22b of the second arm members 14a, 14b.
the respective first projections 16a, 18a and second projections 24a, 26a of the first and second arm members 12a, 14a define a sliding direction along which the first arm member 12a and the second arm member 14a are arranged to slide.
This sliding direction can be seen in Figure 6b and is described in more detail below.
the respective first projections 16b, 18b and second projections 24b, 26b of the first and second arm members 12b, 14b define a sliding direction along which the first arm member 12b and the second arm member 14b are arranged to slide.
connection plate 10a, 10b comprises a pivot point 28a, 28b.
the first connection plate 10a and the second connection plate 10b of the extendable suspension arrangement 8a are attached together at their respective pivot points 28a, 28b so as to rotate relative to each other about this shared pivot point 28a, 28b.
the pivot point 28a, 28b is located centrally between the first connection point 16a, 16b and the second connection point 18a, 18b, both along the sliding direction, and perpendicular to the sliding direction.
the elevator car 1 optionally further includes a cover panel 30, which is configured to cover the working platform 6 when the working platform 6 is in the stowed position, as shown in Figure 4 .
first connection plate 10a, 10d and second connection plate 10b, 10c rotate relative to each other i.e. in opposite directions (and thus the sliding directions of the pairs of arms also rotate relative to each other).
first arm member 12a, 12b, 12c, 12d and the second arm member 14a, 14b, 14c, 14d slide parallel to each other, along a sliding direction, as can be seen with reference to Figures 2 , 3 and 4 , which show the stages as the working platform 6 moves from the operational position to the stowed position.
the sliding direction is fixed relative to the connection plate, as described with reference to the later Figures, but as the connection plate rotates, so too does the sliding direction.
the first connection point 16a, 16b and the second connection point 18a, 18b have an offset from one another in a direction perpendicular to the sliding direction.
the first connection point 16a, 16b and the second connection point 18a, 18b also have an offset from one another along the sliding direction.
an extendable suspension arrangement 8a which has both a long range of extension between the stowed and operational positions, and also a compact footprint when not extended.
the first arm member 12a, 12b, 12c, 12d and the second arm member 14a, 14b, 14c, 14d slide relative to the connection plate 10a, 10b, 10c, 10d, as seen in Figure 3 , and the connection plates 10a, 10b rotate in opposite directions about the shared pivot point 28a, 28b.
the first end 3a of the first arm member 12a, 12b is adjacent to the second end 9a of the second arm member 14a, 14b and the first end 5a of the second arm member 12a, 12b is adjacent to the second end 7a of the second arm member 14a, 14b.
the first arm member and the second arm member 12a, 14a slide into a "stacked" position, in which they overlap along the sliding direction 13a.
connection plates 10a, 10b due to the pivoting of the connection plates 10a, 10b, the first and second arm members 12a, 14a rotate (whilst sliding) to sit in a substantially horizontal position (as defined relative to the elevator car 2) above the working platform 6 in the stowed position, as seen in Figure 4 .
connection plates 10a, 10b and first and second arm members 12a, 12b, 14a, 14b is shown in more detail in the view of Figure 5 , and in the exploded view of Figure 6a .
Figure 6b shows a single exemplary connection plate 10a.
each reference numeral is followed by either “a” or “b”. These reference numerals refer to like components, with the additional “a” and “b” indicating that this component is part of the first extendable suspension arrangement 8a, respectively the outer and inner parts of the first extendable suspension arrangement 8a.
the exemplary extendable suspension arrangement 8a includes a first arm member 12a, 12b, having a slot 20a, 20b, and a second arm member 14a, 14b, having a second slot 22a, 22b.
Each connection plate 10a, 10b comprises four projections, 16a, 16b, 18a, 18b, 24a, 24b, 26a, 26b.
the projections 16b, 18b, 24b and 26b are visible only from their rear side in the view shown in Figure 5 , and project from the side of the connection plate 10b which is not seen in Figure 5 i.e. into the page.
first projection 16a, 16b and a second projection 24a, 24b arranged to move in the slot 20a, 20b of the first arm member 12a, 12b, to form a sliding connection.
first projection 18a, 18b and a second projection 26a, 26b arranged to move in the slot 22a, 22b of the second arm member 14a, 14b, to form a sliding connection.
first set including a connection plate 10a, a first arm member 12a, a second arm member 14a
second set including a connection plate 10b, a first arm member 12b and a second arm member 14b (and likewise for "c” and "d").
connection plates 10a, 10b of these "sets” each have a central pivot point 28a, 28b about which the connection plates 10a, 10b rotate as the extendable suspension arrangement 8a extends when the working platform 6 moves between the stowed position and the operational position.
the connection plates 10a, 10b of the extendable suspension arrangement 8a are arranged to rotate in opposite directions to one another.
the connection plates 10a, 10b are joined at these pivot points 28a, 28b to form a kind of scissor mechanism.
each of the projections 16a, 18a, 24a, 26a is formed by an arrangement of a nut and bolt, placed on opposing sides of the slots 20a, 20b, 22a, 22b and fastened together, in this example.
Each projection 16a, 18a, 24a, 26a additionally includes two washers, to improve the smoothness of sliding.
the pivot points 28a, 28b are attached together by a nut and bolt, passing through a respective hole on each plate 10a, 10b.
Washers are again included, to assist in smooth rotation.
other examples could omit such a nut and bolt fastening and instead rely on projections formed on the surfaces of the connection plates 10a, 10b to slide in the slots 20a, 20b, 22a, 22b, or a combination of these two approaches could be used.
the first projection 16a forms a first connection point which is fixed relative to the connection plate 10a.
the first projection 16a together with the second projection 24a defines a sliding direction 13a for the first arm member 12a.
the first projection 18a forms a second connection point which is also fixed relative to the connection plate 10a, and together the first and second projections 18a, 26a define a sliding direction 13a for the second arm member 14a, which is parallel to the sliding direction 13a of the first arm member 12a. This ensures that the first arm member 12a and the second arm member 14a do not converge as they slide.
the sliding direction 13a is seen more clearly in Figure 6b , which shows a single connection plate 10a (although this could equally be one of the other connection plates 10b, 10c, or 10d).
the first arm member and the second arm member (not shown) slide along the parallel sliding directions 13a.
the first projection 16a, forming the first connection point, and the second projection 18a, which forms the second connection point are offset from each other by a total offset 15a.
the total offset 15a is made up of two different components.
There is a first offset component 17a which is an offset along a direction that is perpendicular to the sliding direction 13a of the first and second arm members.
the offset 17a along this direction allows the first and second arm members to slide along their lengths without contacting each other.
There is also a second offset component 19a which is an offset along the sliding directions 13a.
the offset 19a along the sliding directions 13a increases the total length of the extendable suspension arrangement when both the first arm member and the second arm member are fully “extended” i.e. slid as far as possible away from each other.
connection plate 10a is fixed relative to the connection plate 10a, so the sliding direction 13a is constant with respect to the connection plate 10a.
connection plate 10a is arranged to pivot around the pivot point 28a as the extendable suspension arrangement extends or contracts, so that as the working platform is moved between the stowed and operational positions, the connection plate 10a rotates. Therefore, during this movement, the sliding direction 13a itself rotates with respect to the frame of reference of the elevator car 1.
the elevator car further comprises a counterforce generator, configured to provide a counterforce acting against the weight of the working platform, and a tension member.
the counterforce generator comprises a set of counterweights 120.
Figure 7 shows the elevator car 1 according to the present disclosure, in which the decorative ceiling cover panel 30 has been pivoted down, but the working platform 6 is still in the stowed position.
the counterweights 120 are shown as each being arranged in a vertical stack and retained within a surrounding structure 122 (such as a tube).
the surrounding structure 122 retains the counterweights 120 in position to move along a fixed vertical path, and ensures that they do not fall into the hoistway which could pose a danger.
there could be any number of counterweights for example a single counterweight.
the counterweights 120 When the working platform 6 is in the stowed position, as shown in Figure 7 , the counterweights 120 are at their lowest position, at the bottom of the surrounding structure 122, close to the floor 121 of the elevator car. The side walls of the car have been omitted for clarity. As the working platform 6 is moved out of the stowed position and away from the support frame 4, down towards the operational position, as shown in Figure 8 , the counterweights 120 begin to move vertically upwards, i.e. away from the car floor 121.
the working platform 6 shown in Figure 8 is suspendably connected to the support frame 4 by suspension arrangements 8a, 8b, shown here schematically (omitting the detail which is seen in Figures 1-6 ).
the counterweights 120 are at their uppermost position within the surrounding structure 122.
the suspension arrangements 8a, 8b are also shown schematically in Figure 9 .
the working platform 6 is connected to each of the counterweights 120 by a tension member 124, in this example a rope, as seen most clearly in Figure 10 .
a tension member 124 in this example a rope, as seen most clearly in Figure 10 .
One end of the tension member 124 is fixed to the working platform 6 at a first connection point 126, and the other end of the tension member 124 is connected to one of the counterweights 120 at a second connection point 128.
the tension member 124 passes over a first deflection sheave 130 and over a second deflection sheave 132. Any number of such deflection sheaves can be used, as required.
the first deflection sheave 130 converts vertical motion of the working platform 6 into horizontal motion of a section of the tension member 124
the second deflection sheave 132 converts this horizontal motion of the section of tension member into vertical motion of the section of tension member 124, connected to the counterweight 120.
the weight of the counterweights 120 generates a counterforce that is transmitted by the tension member 124 and acts to apply an upwards vertical force to hoist the working platform 6 towards the stowed position.
the weight of the counterweights 120 provides a counterforce approximately equal to the force acting downwards on the working platform due to its weight.
the weight of the counterweights 120 provides a counterforce which is slightly larger than the downwards force acting on the working platform 6 due to its weight. As a result of this, absent any additional forces, the working platform 6 is automatically hoisted to the stowed position.
Each surrounding structure 122 in this example a tube, is adjacent to, and optionally fixed or attached to, a car upright 136.
Car uprights 136 are existing components known in the art, and various numbers and arrangements of car upright are possible in accordance with the present disclosure.
the number and placement of counterweights 120 and surrounding structures 122 can be altered depending on the number and arrangements of car uprights 136.
Each surrounding structure 122 additionally includes a stopper 138 at the bottom of the surrounding structure 122, which prevents the counterweights 120 from falling out of the bottom of the surrounding structure 122, possibly into the hoistway which could create a danger (e.g. in the event of there being a fault with the tension member 124, or a counterweight 120 becoming detached).
the tension member 124 is fixed at one end to the counterweight 120 and fixed at its other end to the working platform 6, i.e. a 1:1 roping.
the tension member 124 could be arranged to undersling the working platform 6 with its other end fixed to a suitable connection point in the car (e.g. on the opposite upright 136 or on the support frame 4).
the counterforce generator comprises a spring element 140, in particular a gas spring.
the spring element 140 is attached to the working platform 6, specifically to the underside of the working platform 6.
the spring element 140 could alternatively be attached to a top or side surface of the working platform 12, but when attached to the underside the spring element 140 is less likely to get in the way of a maintenance person using the working platform 6.
the spring element 140 may be attached to another suitable component of the elevator car 1, such as the support frame 4 or other stationary part of the elevator car ceiling.
the working platform 6 is shown in the stowed position, with the decorative ceiling cover panel 30 in the open position. It can be seen that the spring element 140 has a piston 152 which is in a fully extended position and thus there is zero counterforce.
Figure 14 shows the working platform 6 in the operational position. In this position, as shown, the spring element 140 is fully compressed.
the piston 152 of the spring element 140 is connected to a tension member 124, which could, for example, be a rope.
the tension member 124 also passes through a deflection plate 150 that is fixed to the working platform 6, before then passing through an aperture 154 in the working platform 6.
the number of times that the tension member 124 passes back and forth between the deflection plate 150 and the piston 152 can be adjusted to give a gearing effect as horizontal movement of the piston 152 is translated into vertical movement of the tension member 124.
Any other suitable roping arrangement which results in the spring element 140 being compressed as the working platform 6 is moved from the stowed position to the operational position, is possible in accordance with the present disclosure.
Figure 15 shows how the tension member 124 passes through the aperture 154 in the working platform and extends vertically to be connected at its second end to a connection point 156 in the elevator car 1 that moves relative to the working platform 6, as the working platform 6 is moved from the stowed position to the operational position.
the point 156 is a pivot point of the extendable suspension arrangement 8b that controls movement of the working platform 6 relative to the support frame 4.
the suspension arrangements 8a, 8b are as described with reference to the earlier Figures. Connecting the tension member 124 to the pivot point of the extendable suspension arrangement 8b advantageously allows the stroke of the spring element 140 to be reduced and consequently is particularly well suited for small elevator cars.
the second end of the tension member 124 could alternatively be connected to a fixed point in the elevator car 1, such as a car floor or ceiling.
the second end of the tension member 124 is connected to the pivot point of the extendable suspension arrangement 8b and the first end of the tension member 124 is connected to a spring element 140 that is attached to the support frame 4 or other part of the car ceiling, rather than being attached to the working platform 6.
the first end of the tension member 124 is connected to a spring element 140 which is attached to the working platform 6, with the second end attached to a point 156 which moves relative to the working platform 6 as the working platform 6 is moved down in the elevator car
the spring element 140 could be attached to a fixed structure within the elevator car 1, and the second end of the tension member 124 could be connected to the working platform 6.
the spring element 140 could be attached to the support frame 4 or elsewhere above the ceiling of the elevator car 1. This would still provide compression of the spring element 140, and hence a counterforce, as the working platform 6 is moved from the stowed position to the operational position, and the tension member 124 could still be arranged to hoist the working platform 6 in the upwards vertical direction.
the spring element 140 provides a counterforce as the working platform 6 is moved downwards into the operational position, due to the compression of the spring element 140. This damping effect can make it safer for a maintenance person to handle the working platform 6. Then, once the working platform 6 is in the operational position, this counterforce is transmitted by the tension member 124, to hoist the working platform 6 back towards the stowed position.
the counterforce provided by the spring element 140 could be less than or approximately equal to the downward force acting on the working platform 6 due to its weight, so that once moved to the operational position it tends to stay there.
the counterforce provided by the spring element 140 may be larger than the downward force acting on the working platform 6 due to its weight, such that once moved to the operational position, the working platform 6 will tend to move back upwards to the stowed position unless an additional weight, such as a toolbox, or a maintenance person, is placed on the working platform 6.
the counterforce generator is a hoisting device, which, when actuated by a maintenance person, changes the length of a suspending portion of a tension member, thereby hoisting or lowering the working platform as required, and thus helping the maintenance person to move the working platform 6 between the operational and stowed positions, in a controlled manner and without having to support its weight.
FIGs 16 and 17 show a working platform 6 according to an example of the present disclosure.
the working platform 6 is in the operational position.
the top surface 213 of the working platform 6 is visible
the underside 214 of the working platform 6 is visible.
the working platform 6 is also connected to the support frame 4 by a first tension member 216a and a second tension member 216b, although as described above, these tension members could be connected instead to an intersection point of the suspension arrangements 8a, 8b.
the first tension member 216a is close to a first side of the working platform 6, and the second tension member 216b is close to a second, opposing side of the working platform 6.
the first tension member 216a passes through the intersection point 215a, or apex, of the extendable suspension arrangement 8a.
the second tension member 16b passes through the intersection point 15b, or apex, of the extendable suspension arrangement 8b.
the working platform 6 includes a ladder 230, which a maintenance person can fold down in order to climb up onto the working platform 6.
Each tension member 216a, 216b is connected to the support frame 4 at a first end of the respective tension member 216a, 216b.
the second end of each tension member 216a, 216b is connected to a hoisting device 218 according to the present disclosure, as shown in Figure 17 .
Each tension member 216a, 216b includes a suspending portion 217a, 217b between the support frame 4 and the working platform 6, which is suspending the working platform 6, or would be if it were not for the suspension arrangements 8a, 8b.
each suspending portion 217a, 217b is substantially vertical.
the hoisting device 218 is shown in more detail in Figure 18 .
Figure 18 shows the arrangement of the hoisting device 218 when the working platform 6 is in the operational position, as shown in Figures 16 and 17 .
the hoisting device 218 includes a worm screw 220 and a sliding member 222.
the mechanism of a worm screw is such that as the worm screw 220 is turned, by means of end connection 232, the sliding member 222 slides along the worm screw 220.
the direction (up or down, as viewed in Figure 18 ) in which the sliding member 222 moves is determined by the direction of rotation of the worm screw 220.
the rotational motion of the worm screw 220 is converted into longitudinal motion of the sliding member 222.
the thread angle (pitch angle) and thread depth of the worm screw are chosen such that the worm screw is self-locking i.e. so that if a maintenance person stops turning the worm screw 220 then the worm screw 220 will remain stationary and so will the sliding member 222.
the working platform 6 will remain stationary as long as the worm screw is not turned i.e. actuated (unless of course, the working platform is moved by a different means e.g. manually lifted).
the sliding member 222 includes a hole which is configured to receive the worm screw and act as a worm-gear i.e. convert rotational motion of the worm screw into longitudinal motion of the sliding member 222 along the worm screw 220.
the hole which receives the sliding member 222 is a plastic self-lubricating ring comprising grooves, which provide the worm-gear mechanism. This allows for easy movement of the sliding member 222 along the worm screw 220.
the hoisting device 218 also includes a first elongate rod 226 and second elongate rod 228.
the sliding member 222 is arranged to slide along these rods 226, 228 as it moves along the worm screw 220.
These rods 226, 228 are smooth so that the sliding member 222 can slide smoothly along them, as it moves, but help to provide stability to the sliding member 222 and prevent it from twisting.
the hoisting device 218 also includes a first deflection sheave 224a and a second deflection sheave 224b.
the sliding member 222 is close to a first end 234 of the worm screw, the end which is nearer to the first and second deflection sheaves 224a, 224b.
the first end 234 is also nearer to the end connection 232.
very little of the tension members 216a, 216b is passing back and forth between the respective deflection sheaves 224a, 224b and the sliding member 222, and therefore the remaining length of the tension members 216a, 216b i.e. the length of the suspending portion 217a, 217b (not shown in Figure 18 ) which is suspending the working platform, is long.
the hoisting device 218 furthermore includes a third deflection sheave 236a and a fourth deflection shave 236b.
These deflection sheaves 236a, 236b direct the tension members 216a, 216b towards the outer edges of the working platform 6, to intersection points 238a, 238b. At these intersection points, the respective tension members 216a, 216b pass through the working platform 6.
the portion of each tension member 216a, 216b which is the other side of the intersection point 238a, 238b (not shown) is the suspending portion 217a, 217b.
Figures 19 and 20 show the working platform 6 according to the present disclosure, in the stowed position.
the top surface 213 of the working platform 6 is visible
Figure 20 the underside 214 of the working platform 6 is visible.
Figure 21 shows the arrangement of the hoisting device 218 when the working platform 6 is in the stowed position, as shown in Figures 19 and 20 .
the same components are labelled as in Figure 18 .
the sliding member 222 is close to a second end 236 of the worm screw 220, the end which is further from the first and second deflection sheaves 224a, 224b.
the tension members 216a, 216b pass around their respective deflection sheaves 224a, 224b, and pass back and forth between these deflection sheaves 224a, 224b and the sliding member 222.
the roping arrangement is 3:1, such that each tension member 216a, 216b passes back and forth between the deflecting sheave 224a, 224b and the sliding member 222 three times. This means that the length of the suspending portion of the tension member 217a, 217b (not shown in Figure 21 ) will have been reduced by three times the length of the distance between the respective deflection sheave 224a, 224b and the sliding member 222.
each tension member 216a, 216b is 'gathered' between the sliding member 222 and the deflection sheaves 224a, 224b, meaning that the suspending portion 217a, 217b of the tension member 216a, 216b is very short.
Figure 22 is a perspective view of the underside 214 of the working platform 6 as the working platform 6 is being moved between the operational position and the stowed position.
the working platform 6 is being moved by actuation of the hoisting device 218.
the hoisting device 218, specifically the end connection 232, is being rotationally driven using a crank 240.
a crank is often provided as a standard tool within an elevator car.
the crank 240 could instead be replaced by an electric drill, which requires minimal exertion from a maintenance person in order to actuate the hoisting device 218.
Figure 23 is a side view of the working platform 6, as shown in Figure 22 , including the hoisting device 218 and the crank 240.
the hoisting device 218 includes a bracket 242 arranged to limit the angle ⁇ at which the crank 240 extends.
the crank 240 extends from the end connection 232 at an angle of ⁇ , where ⁇ is between approximately 120° and 150°. This helps to protect the technician from harm.
the working platform 6, 12 can be lowered from the stowed position into the interior space 2 of the elevator car to an operational position.
the height of the operational position is determine by the range of movement of the extendable suspension arrangement. It is in this operational position that a maintenance person can use the working platform 6, 12 to stand on, and thereby access parts of the elevator system through the open ceiling for maintenance purposes.
the height of the working platform 6, 12 in the operational position is ideally 1.0 m or 1.1 m below the support frame 4, 8. This means that a maintenance person standing fully upright on the working platform 8, 12 will protrude out of an opening in the ceiling of the elevator car 1 as provided by the support frame 4, 8.
providing a minimum distance of 1.0 or 1.1 m between the working platform 6, 12 and the support frame, in the operational position means that a maintenance person can take refuge in a safety space defined in the interior of the car in an emergency.
the examples of an extendable suspension arrangement as disclosed herein provide a sufficient range of movement even when the car dimensions are small and a compact arrangement is needed in the stowed position.
FIG 24 is a perspective view of an elevator system 101 including a hoistway 117.
An elevator car 1, according to the present disclosure, and a main counterweight 105 move in a vertical direction along the hoistway 117.
an elevator car 1 a main counterweight 105, a set of one or more ropes and/or belts 107, a guide rail 109, a machine 111, a position reference system 113, and a controller 115.
the elevator car 1 and main counterweight 105 are connected to each other by the set of ropes/belts 107s.
the main counterweight 105 is configured to balance a load of the elevator car 1 and is configured to facilitate movement of the elevator car 1 concurrently and in an opposite direction with respect to the main counterweight 105 within an elevator hoistway 117 and along the guide rail 109.
the ropes and/or belts 107 engage the machine 111, which is part of an overhead structure of the elevator system 101.
the machine 111 is configured to control movement between the elevator car 1 and the main counterweight 105.
the position reference system 113 may be mounted on a fixed part at the top of the elevator hoistway 117, such as on a support or guide rail, and may be configured to provide position signals related to a position of the elevator car 1 within the elevator hoistway 117.
the controller 115 is located, as shown, in a controller room 123 of the elevator hoistway 117 and is configured to control the operation of the elevator system 101, and particularly the elevator car 1.
the controller 115 may provide drive signals to the machine 111 to control the acceleration, deceleration, levelling, stopping, etc. of the elevator car.
the controller 115 may also be configured to receive position signals from the position reference system 113 or any other desired position reference device.
the elevator car 1 may stop at one or more sets of landing doors 125 as controlled by the controller 115.
the controller 115 may be used to drive the elevator car 1 to any position in the hoistway 117 where a maintenance person seeks sight of or access to components in the hoistway 117. Once the elevator car is safely held at such a position, a maintenance person riding in the car may deploy the working platform as already described above. Although shown in a controller room 123, those of skill in the art will appreciate that the controller 115 can be located and/or configured in other locations or positions within the elevator system 101.
the elevator car 1 has relatively small dimensions, for example a car depth of 800 mm and a car width of 800 mm.

Landscapes

Engineering & Computer Science (AREA)
Civil Engineering (AREA)
Mechanical Engineering (AREA)
Structural Engineering (AREA)
Cage And Drive Apparatuses For Elevators (AREA)

EP20305845.8A 2020-07-23 2020-07-23 Aufzugskabine mit faltbarer arbeitsplattform Active EP3943432B1 (de)

Priority Applications (2)

Application Number	Priority Date	Filing Date	Title
ES20305845T ES2966104T3 (es)	2020-07-23	2020-07-23	Cabina de ascensor con plataforma de trabajo plegable
EP20305845.8A EP3943432B1 (de)	2020-07-23	2020-07-23	Aufzugskabine mit faltbarer arbeitsplattform

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP20305845.8A EP3943432B1 (de)	2020-07-23	2020-07-23	Aufzugskabine mit faltbarer arbeitsplattform

Publications (2)

Publication Number	Publication Date
EP3943432A1 true EP3943432A1 (de)	2022-01-26
EP3943432B1 EP3943432B1 (de)	2023-12-06

Family

ID=72046804

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20305845.8A Active EP3943432B1 (de)	2020-07-23	2020-07-23	Aufzugskabine mit faltbarer arbeitsplattform

Country Status (2)

Country	Link
EP (1)	EP3943432B1 (de)
ES (1)	ES2966104T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN116281520A (zh) *	2023-04-06	2023-06-23	东台创跃机电有限公司	一种稳定性良好的电梯轿厢立柱
EP4286314A1 (de)	2022-06-03	2023-12-06	Otis Elevator Company	Aufzugskabine mit blockierungselement für faltbare arbeitsbühne
EP4286315A1 (de)	2022-06-03	2023-12-06	Otis Elevator Company	Aufzugskabine mit beweglichem elektrokasten
US11945684B2 (en)	2022-07-04	2024-04-02	Otis Elevator Company	Elevator car with foldable working platform

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US20070056809A1 (en) *	2005-08-30	2007-03-15	Inventio Ag	Elevator Car with Maintenance Platform and Method for Maintenance of the Elevator Installation
EP3530603A1 (de) *	2018-02-27	2019-08-28	Otis Elevator Company	Aufzugskabine und aufzugsanlage mit einer aufzugskabine
EP3587333A1 (de)	2018-06-25	2020-01-01	Otis Elevator Company	Aufzugskabine mit beweglicher arbeitsplattform

2020
- 2020-07-23 EP EP20305845.8A patent/EP3943432B1/de active Active
- 2020-07-23 ES ES20305845T patent/ES2966104T3/es active Active

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US20070056809A1 (en) *	2005-08-30	2007-03-15	Inventio Ag	Elevator Car with Maintenance Platform and Method for Maintenance of the Elevator Installation
EP3530603A1 (de) *	2018-02-27	2019-08-28	Otis Elevator Company	Aufzugskabine und aufzugsanlage mit einer aufzugskabine
EP3587333A1 (de)	2018-06-25	2020-01-01	Otis Elevator Company	Aufzugskabine mit beweglicher arbeitsplattform

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP4286314A1 (de)	2022-06-03	2023-12-06	Otis Elevator Company	Aufzugskabine mit blockierungselement für faltbare arbeitsbühne
EP4286315A1 (de)	2022-06-03	2023-12-06	Otis Elevator Company	Aufzugskabine mit beweglichem elektrokasten
US11945684B2 (en)	2022-07-04	2024-04-02	Otis Elevator Company	Elevator car with foldable working platform
CN116281520A (zh) *	2023-04-06	2023-06-23	东台创跃机电有限公司	一种稳定性良好的电梯轿厢立柱
CN116281520B (zh) *	2023-04-06	2023-10-20	东台创跃机电有限公司	一种稳定性良好的电梯轿厢立柱

Also Published As

Publication number	Publication date
ES2966104T3 (es)	2024-04-18
EP3943432B1 (de)	2023-12-06

Publication	Publication Date	Title
US11427441B2 (en)	2022-08-30	Elevator car with foldable working platform
EP3943432B1 (de)	2023-12-06	Aufzugskabine mit faltbarer arbeitsplattform
US11524874B2 (en)	2022-12-13	Elevator car with mechanical assistance for working platform
EP3587333B1 (de)	2021-08-04	Aufzugskabine mit beweglicher arbeitsplattform
EP3530603A1 (de)	2019-08-28	Aufzugskabine und aufzugsanlage mit einer aufzugskabine
CN112777455B (zh)	2022-10-11	电梯轿厢
JP2017095275A (ja)	2017-06-01	補償索の案内装置およびエレベータ
US11267679B2 (en)	2022-03-08	Elevator car apron
US11198594B2 (en)	2021-12-14	Elevator car apron
CN111483954A (zh)	2020-08-04	一种建筑机械用吊篮
CN113968531B (zh)	2024-09-10	具有可折叠式工作平台的电梯轿厢
US5307857A (en)	1994-05-03	Balancing device for a raisable-curtain goods-handling door
EP3838828A1 (de)	2021-06-23	Aufzugsanordnung und verfahren
EP4201861A1 (de)	2023-06-28	Aufzugtüren
EP3599210B1 (de)	2022-05-04	Aufzugskabinenschürze
JP6702504B2 (ja)	2020-06-03	エレベータ用ピット梯子装置
US11945684B2 (en)	2024-04-02	Elevator car with foldable working platform
WO2021038629A1 (ja)	2021-03-04	工事用エレベーター装置
KR102675886B1 (ko)	2024-06-17	일단 및 다단형이 가능한 윈치웨이트 방화막 구동장치
JP2000318954A (ja)	2000-11-21	可変式ダブルデッキエレベータ
US1002048A (en)	1911-08-29	Safety device for elevators.
CN118877679A (zh)	2024-11-01	一种可防止失重下坠的高承载升降机

Legal Events

Date	Code	Title	Description
2021-12-24	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
2021-12-24	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED
2022-01-26	AK	Designated contracting states	Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
2022-02-25	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE
2022-03-30	17P	Request for examination filed	Effective date: 20220223
2022-03-30	RBV	Designated contracting states (corrected)	Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
2023-08-08	GRAP	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOSNIGR1
2023-08-08	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: GRANT OF PATENT IS INTENDED
2023-09-06	INTG	Intention to grant announced	Effective date: 20230809
2023-10-25	GRAS	Grant fee paid	Free format text: ORIGINAL CODE: EPIDOSNIGR3
2023-11-03	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
2023-11-03	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE PATENT HAS BEEN GRANTED
2023-12-06	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
2023-12-06	REG	Reference to a national code	Ref country code: GB Ref legal event code: FG4D
2023-12-15	REG	Reference to a national code	Ref country code: CH Ref legal event code: EP
2023-12-21	REG	Reference to a national code	Ref country code: DE Ref legal event code: R096 Ref document number: 602020022255 Country of ref document: DE
2024-01-03	REG	Reference to a national code	Ref country code: IE Ref legal event code: FG4D
2024-03-25	REG	Reference to a national code	Ref country code: LT Ref legal event code: MG9D
2024-04-08	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240307
2024-04-10	REG	Reference to a national code	Ref country code: NL Ref legal event code: MP Effective date: 20231206
2024-04-15	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-04-18	REG	Reference to a national code	Ref country code: ES Ref legal event code: FG2A Ref document number: 2966104 Country of ref document: ES Kind code of ref document: T3 Effective date: 20240418
2024-04-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240307 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240306
2024-05-15	REG	Reference to a national code	Ref country code: AT Ref legal event code: MK05 Ref document number: 1638238 Country of ref document: AT Kind code of ref document: T Effective date: 20231206
2024-05-21	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-05-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240306 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-07-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240406
2024-07-08	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20240620 Year of fee payment: 5
2024-07-23	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-07-29	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-07-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240406 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-07-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20240619 Year of fee payment: 5
2024-08-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240408
2024-08-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20240408 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-09-09	REG	Reference to a national code	Ref country code: DE Ref legal event code: R097 Ref document number: 602020022255 Country of ref document: DE
2024-10-10	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20240619 Year of fee payment: 5
2024-10-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-10-11	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2024-10-11	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
2024-10-21	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: ES Payment date: 20240802 Year of fee payment: 5
2024-10-29	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206
2024-10-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231206