Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/0043—Devices enhancing safety during maintenance
  • B66B5/005—Safety of maintenance personnel
  • B66B5/0056—Safety of maintenance personnel by preventing crushing

Definitions

• the invention relates to an elevator comprising an elevator shaft provided with landing doors .
• Elevators having a low pit , i . e . the bottom of the shaft are more and more popular, since lowering the pit lowers also capital expenditure of the elevator .
• the pit in this context means the clearance between the bottom of the elevator car and the floor of the elevator shaft in the situation when the elevator car is positioned at the lowest landing .
• EU li ft directive requires that there is a natural safety space at the bottom of the shaft even in a fault situation where the elevator car drops on buf fers the bottom of the shaft .
• the modes required by the natural safety space are : 400x500x2000mm or alternatively 500x700x1000 mm . Therefore , the pit height is problematic to lower further .
• an elevator comprising an elevator shaft provided with landing doors , comprising the lowest of the landing doors being attached to a landing door rack, the lowest landing door and the landing door rack constituting a landing door package , the landing door package being arranged movable on guide elements , the landing door package being movable under control of said guide elements from a normal position where the lowest landing door is serving as an access to an elevator car to a maintenance position where the landing door package lies inside the elevator shaft , providing thus a maintenance space at the bottom of the elevator shaft , the maintenance space being accessible through an opening from where the lowest landing door has moved away .
• an elevator having very low or even absent pit but still providing required natural safety space under the elevator car may be achieved .
• the elevator is characterised by what is stated in the independent claims . Some other embodiments are characteri sed by what is stated in the other claims . Inventive embodiments are also disclosed in the speci fication and drawings of this patent application .
• the inventive content of the patent application may also be defined in other ways than defined in the following claims .
• the inventive content may also be formed of several separate inventions , especially i f the invention is examined in the light of expressed or implicit sub-tas ks or in view o f obtained benef its or benefit groups . Some of the definitions contained in the following claims may then be unnecessary in view of the separate inventive ideas .
• Features of the di f ferent embodiments of the invention may, within the scope of the basic inventive idea, be applied to other embodiments .
• the landing door rack comprises an upper hori zontal support arranged in hori zontal plane above and parallel with the lowest landing door, and a lower hori zontal support arranged in hori zontal plane below and parallel with the lowest landing door .
• the upper hori zontal support comprises at least one buf fer arranged for contacting the bottom of the elevator car .
• the landing door rack comprises a at least one vertical support on both lateral sides of the landing door rack .
• the movement of the landing door package may be reali zed in a simple , reliable and a smooth way with less friction as possible .
• the landing door package in its maintenance position is arranged to serve as a safety screen between the maintenance space and the space reserved for a counterweight .
• the elevator comprises a safety control system, wherein the landing door package is connected with said safety control system so that the presence of the landing door package in the normal position and in the maintenance position is sensed .
• Figure 3 is a schematic view of another elevator in partial cross-section.
• Figure 4 is another schematic view of the elevator shown in Figure 3 .
• Figure 1 is a schematic side view of a lower part of an elevator in partial cross-section
• Figure 2 is another schematic side view of said lower part .
• the elevator 100 comprises an elevator shaft 1 that is provided with landing doors 2 , 2a .
• the lowest 2a of said landing doors is attached or arranged to a landing door rack 3 such that said lowest landing door 2a and the landing door rack 3 constitutes a landing door package 4 .
• the structures of the rack and the package are illustrated more detailed in connection with the following Figures .
• the landing door package 4 - and thus the lowest landing door 2a - is arranged movable on guide elements 5 .
• the landing door package 4 is movable in hori zontal direction .
• the landing door package 4 is movable in an oblique direction so that the landing door package 4 raises when moved from the normal position towards the maintenance position .
• the landing door package 4 is movable in an oblique direction so that the landing door package 4 falls when moved from the normal position towards the maintenance position .
• the landing door package 4 is moved manually without help of any actuator or power unit .
• the landing door package 4 is provided with an actuator or power unit 27 that is arranged to create the force needed for moving the landing door package 4 .
• the landing door package 4 is movable under control of said guide elements 5 from a normal position to a maintenance position .
• the normal position shown in Figure 1
• the lowest landing door 2a is serving as an access to an elevator car 6 .
• the maintenance pos ition shown in Figure 2
• the landing door package 4 lies inside the elevator shaft 1 and provides or creates a maintenance space 7 at the bottom of the elevator shaft 1 .
• the maintenance space 7 is connected or integrated with a pit 26 that lies on the bottom of the elevator shaft 1 .
• the elevator is provided with a safety control system 22 , such as a safety circuit .
• a safety control system 22 such as a safety circuit .
• the landing door package 4 is connected with said safety control system 22 so that the presence of the landing door package 4 in the normal position and in the maintenance position is sensed . This may be reali zed e . g . by closing the safety circuit when the landing door package 4 is in the normal position or in the maintenance position . I f the landing door package 4 is somewhere between said positions , the safety circuit is open .
• the landing door 2 , 2a does not have an actuator of its own .
• the landing door is opened and closed together with the elevator car door (not shown) so that the movements of the latter are transmitted to the landing door .
• the lowest landing door 2a comprises an actuator 17 for moving the door leaf of the lowest landing door open and close , said actuator may be included in the landing door package 4 .
• the at least one lock is operated by a triangle key . In one embodiment , operation of the at least one lock is based on a digital key that may be combined with a mechanical or an electromechanical key . In one embodiment , the at least one lock is an electrically operated lock, the use of which preferably requires authentication of the user .
• Figure 3 is a schematic view of another elevator in partial cross-section
• Figure 4 is another schematic view of the elevator shown in Figure 3 .
• the landing door rack 3 is possible to be constructed many ways .
• it comprises at least one upper hori zontal support 9 that is arranged in hori zontal plane above and parallel with the lowest landing door 2a, at least one lower hori zontal support 10 arranged in another hori zontal plane below and parallel with the lowest landing door 2a, and at least one vertical support 13 on both lateral sides of the landing door rack .
• the embodiment shown in Figures 3 and 4 comprises two vertical supports 13 on both lateral sides of the landing door rack .
• Said supports may be constructed from e . g . a metal profile , and fixed to each other e . g . by welding or fixing means , such as bolts or rivets .
• the upper hori zontal support 9 comprises at least one buf fer 11 that is arranged for contacting the bottom ( or the sling) of the elevator car 6 in case the latter descends on the landing door rack 3 when the landing door rack 3 is arranged to the maintenance position.
• the embodiment shown in Figures 3 and 4 comprises two cylindrically shaped buffers 11, but it is clear that their number and shape may vary.
• the elevator car 6 comprises at least one lower buffer 12 (shown in Figure 2) for contacting the landing door rack 3 that is arranged to its the maintenance position.
• both the landing door rack 3 and the elevator car 6 comprise at least one buffer. Said buffers may be positioned so that they meet as the elevator car contacts the landing door rack, but this is not necessary.
• the landing door package 4 comprises door leaf (s) 14 of the lowest landing door 2a, as well as the sill 15 and the top track 16 of said lowest landing door.
• the structure of said door leaf (s) , sill and top track is preferably equal or similar with those in other landing doors arranged in the elevator shaft 1. in other words, the landing door package and the landing door rack do not necessitate any structural or material modifications to be done in the lowest landing door.
• the guide element 5 is attached to a guide rail 20 that is arranged in the elevator shaft 1 for guiding the elevator car 6.
• a guide rail 20 that is arranged in the elevator shaft 1 for guiding the elevator car 6.
• the guide element 5 is attached to a guide rail guiding the counterweight (not shown) .
• the guide element 5 is attached to the structure of the elevator shaft 1.
• the guide element 5 may be attached to a vertically arranged wall 18 of the elevator shaft or the floor 19 of the elevator shaft, or both the wall and the floor.
• the guide element 5 is attached to said supporting element (s) , e.g. to the supporting beam(s) 23, of the elevator shaft.
• the guide element 5 is further attached to the front wall 24 of the elevator shaft.
• the guide element 5 comprises at least one rail.
• the rail may be arranged to co-operate with one or more roller (s) or slide (s) or rail (s) , for instance, that are attached to the landing door package 4, for instance to the landing door rack 3 thereof.
• the guide element 5 comprises at least one roller.
• the roller may be arranged to co-operate with one or more rail (s) or slide (s) , for instance, that are attached to the landing door package 4, for instance to the landing door rack 3 thereof.
• the guide element 5 comprises at least one slide.
• the slide may be arranged to co-operate with one or more rail (s) , roller (s) or slide (s) , for instance, that are attached to the landing door package 4, for instance to the landing door rack 3 thereof.
• the elevator 100 comprises plurality of guide elements 5.
• the embodiment shown in Figures 3 , 4 comprises four guide elements .
• all the guide elements may be of similar type and structure . However, this is not always necessary .
• the elevator 100 comprises guide rails 20 that are arranged for guiding movements of the elevator car 6 . Said length or extent of the movement is arranged so that the movement of the landing door package 4 stops at a vertical plane 25 next to the plane of the guide rails 20 . This is somewhat less than the distance between the front wall and the back wall of the elevator shaft . In other embodiments , the movement is hal f or more than hal f of said distance between the front and the back walls . In still other embodiments , the movement is substantially less than hal f of said distance between the front and the back walls .

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• Elevator Door Apparatuses (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=83355345

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2022
  • 2022-09-01 EP EP22772505.8A patent/EP4580978A1/de active Pending
  • 2022-09-01 CN CN202280099631.6A patent/CN119790013A/zh active Pending
  • 2022-09-01 WO PCT/EP2022/074373 patent/WO2024046570A1/en not_active Ceased

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