Elevator installation arrangement and method for installing elevator

Abstract

An arrangement for installing an elevator, comprising an installation time platform (90) vertically movable on guide rails (8) arranged in a hoistway (1) of a building (100); the installation time platform (90) being suspendable by a man riding hoist (30) with a hoist rope (31) movable by the man riding hoist in the hoistway (1). The installation time platform (90) comprises an overspeed governor (10) operable with an overspeed governor rope (11) or belt (11) passing in operational state through the overspeed governor, with the upper end of said rope or belt supported by a support structure (2, 200) in the hoistway (1). A method for installing an elevator.

Description

[0001] ELEVATOR INSTALLATION ARRANGEMENT AND METHOD FOR INSTALLING ELEVATOR

[0002] FIELD OF THE INVENTION

[0003] The invention relates to an elevator installation arrangement and a method for installing an elevator. In particular, the invention relates to an elevator installation time platform which can be used in an elevator hoistway during installation of the elevator.

[0004] BACKGROUND OF THE INVENTION

[0005] The construction of an elevator may especially in high-rise buildings be done in parts along the height of the hoistway. The guide rails and the landing doors may first be installed to a first height in the hoistway, then to a second height etc. A construction time elevator may then be operated on the already installed lower portion of the hoistway while the construction of the elevator is going on in a higher portion of the hoistway. Such an elevator may be called also a construction time use CTU elevator.

[0006] For jump lifts, stage installations, as well as installations where the elevator car cannot be used as an installation platform, an installation time platform is used for the installation of the elevator during installation.

[0007] In current installation time platforms, elevators of lower buildings are installed using an elevator overspeed governor during the installation period and a man riding hoist supporting the installation time platform is suspended 2:1 .

[0008] In higher buildings, the installation time platform is suspended 1 :1 and as a second safety device, a commercial brake-operated safety device is used. Such a fall-arrest secondary safety device may be fitted to an appropriate wire safety rope. Such an installation requires separate brakes on the installation time platform as well as a safety rope, which is usually the same size as the rope on the man riding hoist.

[0009] When installed on a 1 :1 suspended installation time platform, a commercial safety device may be used as a second restraint to activate the separate brakes that adhere to guide rails in the elevator hoistway. There are different sizes of brake activating safety devices, depending on the man riding hoist used.

[0010] Due to the different safety components usable with installation time platforms there is a risk of using false or incorrectly dimensioned safety devices. SUMMARY OF THE INVENTION

[0011] An object of the present invention is to present an improved elevator installation arrangement and a method and to solve above mentioned drawbacks in the prior art.

[0012] A particular object of the present invention is to enhance safety in elevator installations.

[0013] A particular object of the present invention is to enable using an overspeed governor as a replacement for an additional brake activating safety device for the installation time platform.

[0014] In that way, a variety of belt and rope operated overspeed governors on the market, the operation of which is based on a stationary rope or belt, can replace a brake activating safety device in use on the installation time platform, making it easy to change the installation time platform for use on all installations done by the installation time platform.

[0015] Thus, the safety components of the installation time platform will always be the same, eliminating the possibility of using false or incorrectly dimensioned safety devices.

[0016] The arrangement for installing an elevator comprises an installation time platform vertically movable on guide rails arranged in a hoistway of a building; the installation time platform being suspendable by a man riding hoist with a hoist rope movable by the man riding hoist in the hoistway. The installation time platform comprises an overspeed governor operable with an overspeed governor rope or belt passing in operational state through the overspeed governor, with the upper end of said rope or belt supported by a support structure in the hoistway.

[0017] According to an embodiment, the installation time platform comprises at least one safety gear activatable by the overspeed governor via a safety gear activating mechanism comprised by the installation time platform, when the speed of the installation time platform exceeds a predetermined speed of the overspeed governor.

[0018] According to an embodiment, the installation time platform comprises a foot mounting for the man riding hoist, the assembly of the foot mounting relative to the installation time platform comprising a permitted vertical movement distance so that the at least one safety gear comprised by the installation time platform is activated when the foot mounting is in a lower position.

[0019] According to an embodiment, the foot mounting is connected to a lower horizontal beam comprised by the frame.

[0020] According to an embodiment, the arrangement comprises a man riding hoist to support and vertically move the installation time platform in the hoistway.

[0021] According to an embodiment, the overspeed governor is connected to a lower horizontal beam comprised by a frame of the installation time platform.

[0022] According to an embodiment, the support structure comprises at least one of the following: a hoistway ceiling; a protection deck arranged in the hoistway; a hoisting / supporting point tool arranged in the hoistway.

[0023] According to an embodiment, the support structure comprises a hoisting point to support the installation time platform via the man riding hoist and the hoist rope; and / or a supporting point to support an upper end of the overspeed governor rope or belt.

[0024] According to an embodiment, a lower end of the overspeed governor rope / belt is located below the installation time platform near the bottom of the hoistway and preferably has a weight or tensioning station suspended on it.

[0025] According to an embodiment, the installation time platform is suspended 1 :1 or 2:1 by the man riding hoist, wherein preferably in the 1 :1 mounting the overspeed governor is arranged parallel to the man riding hoist.

[0026] According to an embodiment, the safety gear activating mechanism comprises a brake synchronization bar; a first safety gear activator lever connected to the brake synchronization bar; a brake activation arm coupled to the overspeed governor; a first link connected to the first safety gear activator lever and the brake activation arm.

[0027] According to an embodiment, the overspeed rope has a diameter of 5-8 mm, preferably 6 mm.

[0028] The method for installing an elevator comprises: providing an installation time platform vertically movable on guide rails arranged in a hoistway of a building; suspending the installation time platform by a man riding hoist with a hoist rope movable by the man riding hoist in the hoistway, providing the installation time platform with an overspeed governor operable with an overspeed governor rope or belt passing through the overspeed governor, with the upper end of said rope or belt supported by a support structure in the hoistway, and activating at least one safety gear comprised by the installation time platform when the speed of the installation time platform exceeds a predetermined speed of the overspeed governor.

[0029] According to an embodiment, the installation time platform comprises a foot mounting for the man riding hoist, the assembly of the foot mounting relative to the installation time platform comprising a permitted vertical movement distance; and activating the at least one safety gear when the foot mounting is descended in a lower position.

[0030] According to an embodiment, the overspeed governor is connected to a lower horizontal beam comprised by a frame of the installation time platform.

[0031] According to an embodiment, providing the support structure with: a hoisting point to support the installation time platform via the man riding hoist and the hoist rope; and / or a supporting point to support an upper end of the overspeed governor rope or belt.

[0032] The described solution brings the advantages of, among others: lighter overall of the installation time platform, the solution can be used in jump elevators making it easy to extend the ropes. Further, installation time can be saved since the safety components are lighter, for example the ropes / belts. Further, safety can be improved due to checking of less components and no need to select a correctly sized braking device. The safety components of the installation time platform will be the same, eliminating the possibility of using false or incorrectly dimensioned safety devices. Savings can be achieved since the same installation time platform works on all installations 1 :1 and 1 :2 with small changes.

[0033] BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The invention will in the following be described in greater detail by means of preferred embodiments with reference to the attached drawings, in which:

[0035] Figures 1 and 2 show a prior art installation time platform suspended at 1 :1 by ropes attached to a ceiling in an elevator hoistway,

[0036] Figure 3 shows a first embodiment of an elevator installation arrangement for installing an elevator, in which an installation time platform suspended 1 :1 comprises an overspeed governor,

[0037] Figure 4 shows details of the installation time platform of Figure 3 from below,

[0038] Figure 5 shows a second embodiment of an elevator installation arrangement for installing an elevator, in which an installation time platform is suspended 2:1 .

[0039] Figures 6 to 9 illustrate an elevator installation arrangement and a method for installing an elevator with an installation time platform, an elevator car and a counterweight arranged vertically movable in a hoistway.

[0040] DETAILED DESCRIPTION

[0041] Figures 1 and 2 show a prior art installation time platform 20 arrangement. The platform 20 is suspended 1 :1 by a man riding hoist 30 having a hoist rope 31 from a hoisting point 61 in a ceiling 2 in an elevator hoistway 1 . The platform 20 is vertically movable on guide rails 8 arranged in the hoistway.

[0042] A commercial fall-arrest secondary safety device 40 is arranged parallel to the man riding hoist 30. The commercial fall-arrest secondary safety device 40 requires separate brakes 26 on the installation time platform 20 as well as a safety rope 41 , which is usually the same size as the rope on the man riding hoist 30. The safety device 40 is suspended from the ceiling 2 by a safety rope 41 having thickness about 10-14 mm.

[0043] The platform 20 comprises a cover 21 co-operating with a frame 22, the frame comprising vertical beams 23, horizontal beams 24 and horizontal safety rails 24a. The platform 20 may be accessed by an operator through an opening 1a in a hoistway wall 1 b.

[0044] The commercial safety device 40 is used as a second restraint to activate the separate brakes 26 that adhere to elevator guide rails 8. There are different sizes of brake activating safety devices 40, depending on the man riding hoist 30 used. The platform 20 comprises below the frame 22 a safety module with separate brakes 26 which may be activated to contact elevator guide rails 8 via a brake synchronization bar 25. The guide rails 8 are mounted to hoistway walls 1 b. The platform brakes 26 are located in connection with vertical beams 23 of the installation time platform 20 and are activated if either of the ropes 31 ; 41 attached to the ceiling 2 loosens or the operator presses a brake activation pedal in vicinity of the platform cover 21. Said brake activation pedal is linked with the brake synchronization bar 25. When the hoist rope 31 of the man riding hoist 30 loosens, a spring-operated plate under the man riding hoist 30 activates the platform brakes 26. The platform brakes 26 are also activated if eccentric wheels inside the commercial safety device 40 spin too fast due to excessive speed.

[0045] Figure 3 shows a first embodiment of an elevator installation arrangement for installing an elevator, in which an installation time platform 90 suspended 1 :1 comprises an overspeed governor 10 instead of the brakeoperating safety device, and Figure 4 shows details of the installation time platform 90 from below.

[0046] The installation time platform 90 is suspended 1 :1 by a man riding hoist 30 with a hoist rope 31 for supporting installation time platform 90 from a ceiling 2 or a protection deck 200 arranged in the hoistway in an elevator hoistway 1 .

[0047] The arrangement comprises a support structure 2, 200 in the hoistway 1 for example a hoistway ceiling 2 or a protection deck 200 or a hoisting / supporting point tool (not shown) arranged in the hoistway. The support structure comprises a hoisting point 61 to support the installation time platform 90 via the man riding hoist 30 and the hoist rope 31 ; and a supporting point 62 to support an upper end of an overspeed governor rope 11 or belt 11 . The overspeed governor 10 is arranged alongside or parallel to the man riding hoist 30. The overspeed governor 10 may be connected to a lower horizontal beam 24 of the installation time platform 90.

[0048] The lower end of the overspeed governor rope / belt 11 hangs or is located below the installation time platform 90 near the bottom of the hoistway 1 and preferably has a weight or tensioning station suspended on it. The overspeed governor rope / belt 11 passes in operational state through the overspeed governor 10, and the overspeed governor will be activated at a predetermined overspeed of the rope / belt 11 relative to the overspeed governor 10.

[0049] At least one safety gear 36 is provided in the platform 90. A safety gear activating mechanism 27 comprised by the arrangement comprises a synchronization bar 25, and a first safety gear activator lever 14 and a second safety gear activator lever 15 connected to the synchronization bar 25. The overspeed governor 10 is connected to the synchronization bar 25, preferably to the middle of the synchronization bar. When at least one of the first safety gear activator lever 14 and the second safety gear activator lever 15 is moved, for example in Figure 3 upwards, the brake synchronization bar 25 rotates, and both ends of the brake synchronization bar 25 connected - preferably indirectly - preferably to two safety gears 36 initiate a safety braking. Preferably one safety gear 36 is located at an upper section of each of the two vertical beams 23.

[0050] When the speed of the installation time platform exceeds a predetermined speed of the overspeed governor, the overspeed governor would be activated, activating the safety gears 36 of the installation time platform through the safety gear activating mechanism 27 and the synchronization bar 25.

[0051] In the solutions of Figures 3-4, the safety gear activating mechanism 27 comprises a brake activation arm 12 coupled to the overspeed governor 10 and in cooperation with a first link 13, wherein the first link 13 is in cooperation with the first safety gear activator lever 14 connected to the brake synchronization bar 25.

[0052] The man riding hoist 30 is attached to the installation time platform 90 with a foot mounting 32, which is attached to the lower beams 24 with shafts 33 which may be round bars. The hoist foot mounting 32 is movable up and down a permitted vertical movement distance between the lower beams 24 of the frame 22 for example about 50 mm. As the hoist rope 31 loosens and the foot mounting 32 of the man riding hoist descends to a lower position, an activation link 16 will be pressed down (Figure 4), activating the safety gears 36 and securing the installation time platform 90. The brake synchronization bar 25 can also be linked with a brake activation pedal which can be manually pressed by the operator.

[0053] Figure 5 shows a second embodiment of an elevator installation arrangement for installing an elevator, in which the installation time platform 90 is suspended 2:1. For the sake of clarity, the overspeed governor 10 is illustrated, but most details of the man riding hoist 30 mounting to the installation time platform 90 by at least one foot mounting 32a are left away. It is to be appreciated that the man riding hoist 30 mounting to the installation time platform 90 by the at least one foot mounting 32a corresponds to the arrangement shown in Figures 3 and 4, with another location of the foot mounting 32 preferably in two foot mounting locations 32a around the overspeed governor 10.

[0054] According to a method for installing an elevator: providing an installation time platform 90 vertically movable on guide rails 8 arranged in a hoistway 1 of a building 100; suspending the installation time platform 90 by a man riding hoist 30 with a hoist rope 31 movable by the man riding hoist in the hoistway 1 , providing the installation time platform 90 with an overspeed governor 10 operable with an overspeed governor rope 11 or belt 11 passing through the overspeed governor, with the upper end of said rope or belt supported by a support structure 2, 200 in the hoistway 1 , and activating at least one safety gear 36 comprised by the installation time platform when the speed of the installation time platform exceeds a predetermined speed of the overspeed governor.

[0055] According to an embodiment the installation time platform 90 comprises a foot mounting 32 for the man riding hoist 30, the assembly of the foot mounting relative to the installation time platform comprising a permitted vertical movement distance; and activating the at least one safety gear 36 when the foot mounting is descended in a lower position.

[0056] According to an embodiment the overspeed governor 10 is connected to a lower horizontal beam 24 comprised by a frame 22 of the installation time platform 90.

[0057] According to an embodiment providing the support structure 2, 200 with: a hoisting point 61 to support the installation time platform 90 via the man riding hoist 30 and the hoist rope 31 ; and / or a supporting point 62 to support an upper end of the overspeed governor rope or belt 11 .

[0058] Figures 6-9 show an elevator installation arrangement for installing an elevator with an elevator car 3 and a counterweight 4 arranged vertically movable in a hoistway 1. The elevator car 3 and the counterweight 4 are suspended with a hoisting roping 51 passing around a drive wheel of an elevator hoisting machinery 53.

[0059] Figures 6-9 illustrate an example with various installation phases of a CTU elevator 2:1 installation during construction of a building 100.

[0060] A weather deck 101 and a temporary working deck may be installed in the elevator hoistway 1 preferably by the builder. The weather deck 101 may be an inclined waterproof deck which seals the hoistway to keep it clean and dry.

[0061] The elevator installers may install a protection deck 200 from the working deck for protecting the portion of the hoistway below the protection deck 200 from any possible falling objects.

[0062] When more height is needed in connection of a jump, the counterweight 4 may be lowered to the bottom of the hoistway 1 to a suitable height and the ropes or belts 51 may be slackened.

[0063] The arrangement comprises a man riding hoist 30 which serves for hoisting an elevator car 3 or an installation time platform 90.

[0064] The man riding hoist 30 is capable of moving a hoist rope 31 .

[0065] The arrangement comprises a hoisting point 61 configured to support the car 3 or the installation time platform 90 via the man riding hoist 30 and hoist rope 31 .

[0066] In Figure 6, the hoisting point 61 is supported by the protection deck 200 for guiding and supporting the hoist rope 31 .

[0067] The protection deck 200 with auxiliary equipment may be used as movable installation tool for hoisting of large loads such as: a movable machine room of an elevator located below the protection deck or, as shown e.g. in Figure 7, an elevator car 3 or an installation time platform 90 below the protection deck.

[0068] In Figure 6, the man riding hoist 30 is mounted separate from the protection deck 200. The man riding hoist 30 may be mounted on the elevator car 3 or the installation time platform 90 and the hoist rope 31 passes around the hoisting point 61 .

[0069] Once the protection deck is installed and the hoistway is sealed, the elevator installation can start for the bottom section of the hoistway below the protection deck.

[0070] In the bottom section of the hoistway below the protection deck, car guide rails, counterweight guide rails, a counterweight buffer assembly 110, a car buffer assembly 120, a counterweight 4 and a working platform are installed in a pit 140. The installation time platform 90 is then used for the bottom section of the hoistway.

[0071] According to an embodiment the car 3 is used as the working platform in the bottom section. The car is moved with the help of the man riding hoist 30. The landing doors 55 and other elevator hoistway components are installed in the bottom section of the hoistway. The elevator installation below the protection deck is then completed for construction time use. An elevator hoisting machine 53 and elevator suspension ropes 51 are installed and a temporary headroom 1.1 electrification is finalized in the uppermost part of the bottom section of the hoistway 1 below the protection deck. Thereafter the elevator is inspected and handed over for construction time use to serve the bottom section of the hoistway (Figure 7).

[0072] While the elevator is installed at the bottom section of the building 100, the building construction continues normally above it.

[0073] Figure 7 shows the CTU elevator in the bottom section and an installation time platform 90 moved on top of the protection deck 200 as a preparation for a next section elevator installation.

[0074] The installation time platform 90 supported by the protection deck 200 (Figure 9) or the ceiling 2 (Figure 8) of the hoistway may be used in the next at least one installation above the bottom section. The elevator installation is paused until the hoistway for a next section is ready.

[0075] When the next section above the bottom section is a top section as shown in Figure 8, the man riding hoist 30 is connected to the ceiling 2 of the hoistway for supporting the installation time platform 90.

[0076] When the next section above the bottom section is an intermediate section in case the elevator is installed in more than two sections as shown in Figure 9, the man riding hoist 30 is supported utilizing a second protection deck 200. The elevator installation with guide rails, landing doors, elevator hoistway electrification etc. continues for the next section from the installation time platform 90.

[0077] For jumping, in other words extending the travel to the next intermediate section, the elevator is taken out of CTU in the below section and the below section top components are moved to the temporary headroom 1 .n of the now finalized intermediate section.

[0078] The suspension ropes 51 are extended or replaced with longer ones. The installation time platform 90 and the below protection deck 200 are taken out of the hoistway 1 . The elevator is inspected and handed over for construction time use, while the elevator installation above continues in case of a multi-zone elevator installation. The intermediate section installation is repeated as many times as needed.

[0079] In short, for the top section installation the installation time platform 90 is supported from the ceiling 2 as shown in Figure 8. The elevator installation with guide rails, landing doors, elevator hoistway electrification etc. continues for the top section from the installation time platform 90. For extending the travel up to the top section, the elevator in the below section is taken out of CTU and the below section top components are moved to the final headroom 1 ” of the installed top section. A final electrification is installed to the headroom 1 ”. The suspension ropes 51 are extended during the jump or replaced with longer ones. The installation time platform 90 and respective below protection deck are taken out of the hoistway. The elevator is inspected and handed over for construction time use for the full height of the building as shown in Figures 8 and 9. The elevator runs in construction time use for whole travel until the final handover. The car 3 may transport people and / or goods between the landings 50 in the building 100.

[0080] It will be obvious to a person skilled in the art that, as the technology advances, the inventive concept can be implemented in various ways. The invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.

Claims

CLAIMS1 . An arrangement for installing an elevator, comprising an installation time platform (90) vertically movable on guide rails (8) arranged in a hoistway (1 ) of a building (100); the installation time platform (90) being suspendable by a man riding hoist (30) with a hoist rope (31 ) movable by the man riding hoist in the hoistway (1 ); wherein the installation time platform (90) comprises an overspeed governor (10) operable with an overspeed governor rope (11 ) or belt (11 ) passing in operational state through the overspeed governor, with the upper end of said rope or belt supported by a support structure (2, 200) in the hoistway (1 ).

2. The arrangement according to claim 1 , wherein the installation time platform (90) comprises at least one safety gear (36) activatable by the overspeed governor (10) via a safety gear activating mechanism (27) comprised by the installation time platform, when the speed of the installation time platform exceeds a predetermined speed of the overspeed governor.

3. The arrangement according claim 1 or 2, wherein the installation time platform (90) comprises a foot mounting (32) for the man riding hoist (30), the assembly of the foot mounting relative to the installation time platform comprising a permitted vertical movement distance so that at least one safety gear (36) comprised by the installation time platform is activated when the foot mounting is in a lower position.

4. The arrangement according to claim 3, wherein the foot mounting (32) is connected to a lower horizontal beam (24) comprised by the frame (22).

5. The arrangement according to any of claims 1 to 4, comprising a man riding hoist (30) to support and vertically move the installation time platform (90) in the hoistway (1 ).

6. The arrangement according to any of claims 1 to 5, wherein the overspeed governor (10) is connected to a lower horizontal beam (24) comprised by a frame (22) of the installation time platform (90).

7. The arrangement according to any of claims 1 to 6, wherein the support structure (2, 200) comprises at least one of the following: a hoistway ceiling (2); a protection deck (200) arranged in the hoistway (1 ); a hoisting / supporting point tool arranged in the hoistway (1).

8. The arrangement according to any of claims 1 to 7, wherein the support structure (2, 200) comprises a hoisting point (61) to support the installation time platform (90) via the man riding hoist (30) and the hoist rope (31 ); and / or a supporting point (62) to support an upper end of the overspeed governor rope or belt (11 ).

9. The arrangement according to any of claims 1 to 8, wherein the installation time platform (90) is suspended 1 :1 or 2:1 by the man riding hoist (30), wherein preferably in the 1 :1 mounting the overspeed governor (10) is arranged parallel to the man riding hoist.

10. The arrangement according to any of claims 1 to 9 when dependent on claim 2, wherein the safety gear activating mechanism (27) comprises a brake synchronization bar (25); a first safety gear activator lever (14) connected to the brake synchronization bar; a brake activation arm (12) coupled to the overspeed governor (10); a first link (13) connected to the first safety gear activator lever and the brake activation arm.11 . The arrangement according to any of claims 1 to 10, wherein the overspeed rope (11 ) has a diameter of 5-8 mm, preferably 6 mm.

12. A method for installing an elevator comprising: providing an installation time platform (90) vertically movable on guide rails (8) arranged in a hoistway (1) of a building (100); suspending the installation time platform (90) by a man riding hoist (30) with a hoist rope (31 ) movable by the man riding hoist in the hoistway (1 ),providing the installation time platform (90) with an overspeed governor (10) operable with an overspeed governor rope (11 ) or belt (11 ) passing through the overspeed governor, with the upper end of said rope or belt supported by a support structure (2, 200) in the hoistway (1 ), and activating at least one safety gear (36) comprised by the installation time platform when the speed of the installation time platform exceeds a predetermined speed of the overspeed governor.

13. The method according to claim 12, wherein the installation time platform (90) comprises a foot mounting (32) for the man riding hoist (30), the assembly of the foot mounting relative to the installation time platform comprising a permitted vertical movement distance; and activating the at least one safety gear (36) when the foot mounting is descended in a lower position.

14. The method according to claim 12 or 13, wherein the overspeed governor (10) is connected to a lower horizontal beam (24) comprised by a frame (22) of the installation time platform (90).

15. The method according to any of claims 12 to 14, wherein providing the support structure (2, 200) with: a hoisting point (61 ) to support the installation time platform (90) via the man riding hoist (30) and the hoist rope (31 ); and / or a supporting point (62) to support an upper end of the overspeed governor rope or belt (11 ).

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