Elevator dismantling method and work frame used therefor

Abstract

To provide an elevator disassembling method and a working frame used for the elevator disassembling method by which only an elevator can be safely disassembled without dropping a cage and a counterweight and without destroying a building itself such as a wall of the building.SOLUTION: An elevator disassembling method includes the steps of: making a counterweight higher than an existing cage of an elevator to be dismantled; shutting off the power supply of the elevator to be dismantled; assembling a working frame above the existing cage of the elevator to be dismantled; raising the working frame; dismantling a counterweight; dismantling a wire rope, which connects the existing cage of the elevator to be dismantled and the counterweight; and dismantling the existing cage of the elevator to be dismantled.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an elevator dismantling method for dismantling an elevator and a working frame used therefor. [Background technology]

[0002] An elevator consists of a car for carrying passengers and a counterweight for balancing the car, connected by a wire rope. Various methods have been proposed for dismantling elevators, but when dismantling an elevator, one thing that must be taken into consideration is the presence of the counterweight.

[0003] If the wire rope is cut when attempting to dismantle an elevator, the counterweight and car will fall to the ground. If there are people under the counterweight or car at this time, they will fall from above, creating an extremely dangerous situation. Furthermore, if the dismantling method involves cutting the wire ropes, the elevator will ultimately be demolished by drilling holes in the building's existing walls, which will ultimately damage and destroy the building itself, including the walls. While this is acceptable for demolition work that includes the building, it creates the problem of not being able to cleanly dismantle just the elevator. Furthermore, if the building is to be demolished, measures must be taken to prevent asbestos from scattering.

[0004] For example, in the elevator dismantling method shown in Patent Document 1, the counterweight is lowered to the bottom of an underground pit, the wire rope connecting the car and the counterweight is cut near the pulley, the car is dropped to the bottom of the underground pit, and the cut wire rope is also dropped.The counterweight and the dropped car are then dismantled in the underground pit and removed (carried out) from the elevator shaft.

[0005] As described above, in Patent Document 1, the wire rope is cut to drop the car, so the process of dropping the car is essential. For heavy elevators with cars weighing 5 tons or so, the process of dropping such a car is dangerous. Furthermore, when dismantling elevators in high-rise buildings, the car must be dropped from an even higher position, which further increases the risk.

[0006] Furthermore, in the elevator dismantling method of Patent Document 2, the wire rope is not cut to drop the counterweight or car, but the workers performing the dismantling work, such as removing the car-related equipment, wiring, hoistway equipment, or wiring, must perform the work on the car frame shown in Figure 1 of Patent Document 2. Working on the car frame in this way is extremely dangerous, as the counterweight passes within approximately 3 cm of the worker. If the worker comes into contact with the counterweight, it could result in a fatal accident. The danger increases particularly when the car weighs 5 tons or more, as the counterweight becomes relatively heavier. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2015-124021 [Patent Document 2] Patent Publication No. 62-16995 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in consideration of the above-mentioned problems of the prior art, and aims to provide a method for dismantling an elevator that allows the elevator to be safely dismantled without dropping the car or counterweight, and that does not destroy the building itself, such as its walls, and a work frame to be used for that method. [Means for solving the problem]

[0009] The elevator dismantling method of the present invention includes the steps of placing the counterweight higher than the existing car of the elevator to be dismantled, cutting off the power supply to the elevator to be dismantled, assembling a work frame above the existing car of the elevator to be dismantled, raising the work frame, dismantling the counterweight, dismantling the wire rope connecting the existing car of the elevator to be dismantled and the counterweight, and dismantling the existing car of the elevator to be dismantled.

[0010] It is preferable to include a step of installing a lifting machine before the working frame assembling step or after the working frame assembling step.

[0011] It is preferable to include a step of dismantling the interior of the elevator tower after the step of dismantling the counterweight.

[0012] It is preferable to include a step of dismantling the guide rails of the existing elevator car from above after the step of dismantling the counterweight.

[0013] It is preferable that the method further includes a working frame dismantling step of dismantling the working frame after the counterweight dismantling step.

[0014] It is preferable that the method further includes an elevator hall dismantling step of dismantling the elevator hall after the counterweight dismantling step.

[0015] It is preferable that the method includes a pit dismantling step of dismantling the inside of the pit after the counterweight dismantling step.

[0016] In this specification, the above-mentioned meaning of "after the counterweight dismantling process" is sufficient as long as it is after the counterweight dismantling process, and does not necessarily have to be immediately after the counterweight dismantling process, and is a concept that also includes the period after multiple processes have been carried out after the counterweight dismantling process.

[0017] The working frame of the present invention is a working frame used in the elevator dismantling method, and includes a working floor and a fall prevention catch block that is attached to an existing guide rail. [Effects of the Invention]

[0018] The present invention has the significant effect of providing a method for dismantling an elevator and a working frame for use therein, which allows the elevator to be safely dismantled without dropping the car or counterweight, and which does not destroy the building itself, such as its walls. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a flowchart showing an elevator dismantling method of the present invention. [Figure 2] 1 is a perspective view showing one embodiment of a working frame used in an elevator dismantling method of the present invention. FIG. [Figure 3] 3(a) is a front view of an elevator guide shoe, FIG. 3(b) is a side view of the elevator guide shoe, and FIG. 3(c) is a front view of a fall prevention catch box. [Figure 4] FIG. 1 is a plan view of a typical elevator. [Figure 5] 1 is a cross-sectional view showing one embodiment of the elevator dismantling method of the present invention, illustrating the dismantling method for a machine room-less elevator. FIG. [Figure 6] This is a schematic cross-sectional view showing step 1 of the dismantling method for a machine room-less elevator. [Figure 7]This is a schematic cross-sectional view showing stage 2 of the dismantling method for a machine room-less elevator. [Figure 8] This is a schematic cross-sectional view showing stage 3 of the dismantling method for a machine room-less elevator. [Figure 9] This is a schematic cross-sectional view showing stage 4 of the dismantling method for a machine room-less elevator. [Figure 10] This is a schematic cross-sectional view showing stage 5 of the dismantling method for a machine room-less elevator. [Figure 11] This is a schematic cross-sectional view showing step 6 of the method for dismantling a machine room-less elevator. [Figure 12] This is a schematic cross-sectional view showing step 7 of the method for dismantling a machine room-less elevator. [Figure 13] This is a schematic cross-sectional view showing step 8 of the method for dismantling a machine room-less elevator. [Figure 14] 1 is a cross-sectional view showing one embodiment of the elevator dismantling method of the present invention, illustrating the dismantling method for an elevator with a machine room. FIG. [Figure 15] This is a schematic cross-sectional view showing stage 1 of the method for dismantling an elevator with a machine room. [Figure 16] This is a schematic cross-sectional view showing stage 2 of the dismantling method for an elevator with a machine room. [Figure 17] This is a schematic cross-sectional view showing stage 3 of the dismantling method for an elevator with a machine room. [Figure 18] This is a schematic cross-sectional view showing stage 4 of the method for dismantling an elevator with a machine room. [Figure 19] This is a schematic cross-sectional view showing stage 5 of the method for dismantling an elevator with a machine room. [Figure 20] This is a schematic cross-sectional view showing step 6 of the method for dismantling an elevator with a machine room. [Figure 21] This is a schematic cross-sectional view showing step 7 of the method for dismantling an elevator with a machine room. [Figure 22] This is a schematic cross-sectional view showing step 8 of the method for dismantling an elevator with a machine room. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention will be described below with reference to the accompanying drawings, in which: the illustrated examples are merely illustrative, and it goes without saying that various modifications are possible without departing from the technical spirit of the present invention. The same components are designated by the same reference numerals.

[0021] Figure 1 is a flowchart showing the elevator dismantling method of the present invention. This invention is characterized by assembling a work frame on top of the existing car of the elevator to be dismantled. Figure 2 shows the work frame used in the elevator dismantling method of the present invention.

[0022] In Figure 2, the work frame 10 is configured to include a work floor 12, an opening 14 formed in the work floor, a handrail 16 provided on the work floor, guide rail engagement portions 18a, 18b that can be engaged with existing guide rails, work frame guide shoes 20 provided on the guide rail engagement portions 18a, 18b, and fall prevention catch boxes 22 provided on the guide rail engagement portions 18a, 18b.

[0023] FIG. 3 shows an enlarged view of the guide shoe 20 and fall prevention catch box 22 of the working frame. FIG. 3(a) is a front view of the guide shoe 20 of the working frame, and FIG. 3(b) is a side view of the guide shoe 20 of the working frame. FIG. 3(c) is a front view of the fall prevention catch box 22. The guide shoe 20 of the working frame has the same structure as an elevator guide shoe and is generally a device for guiding an elevator car along a guide rail. The elevator guide shoe is attached to the guide rail engagement parts 18a and 18b. The fall prevention catch box 22 is generally a safety device (also called a catch block) that prevents the elevator car from overspeeding and brings it to an emergency stop. The fall prevention catch box is attached to the guide rail engagement parts 18a and 18b of the working frame 10. In this way, the working frame 10 shown in FIG. 2 has an extremely safe structure.

[0024] 2, the opening position of the working frame 10 is changed depending on the elevator. FIG. 4 shows a plan view of a typical elevator 24.

[0025] In Figure 4, reference numeral 26 denotes a building wall, and reference numeral 27 denotes an elevator hall entrance door provided in an elevator opening 29 in the building wall 26. The elevator 24 is broadly composed of a car 28 for carrying passengers and a counterweight 30 for balancing. Reference numeral 33 denotes a guide rail, and the car 28 is guided by the guide rail 33. The counterweight 30 is composed of a counter frame 32 and multiple weights 34, and balances the car 28. The counterweight 30 is guided by a counterweight guide rail 36.

[0026] <In the case of elevators without machine rooms> FIG. 5 is a cross-sectional view showing one embodiment of the elevator dismantling method of the present invention, illustrating the dismantling method for a machine room-less elevator 24A. In FIG. 5, the work frame 10 of the present invention is installed above the car 28 of the elevator 24A to be dismantled, and a worker O rides on it to perform the dismantling work. In FIG. 5, reference numeral 38 denotes a wire rope that connects the car 28 to the counterweight 30 to move the car 28 up and down. A frame rope 40 is connected to the work frame 10. In FIG. 5, reference numerals 42, 44, and 46 denote pulleys, and reference numeral 48 denotes a hoist.

[0027] Next, a method for dismantling the machine room-less elevator 24A by the elevator dismantling method of the present invention will be described with reference to FIGS. 1 and 6 to 13. FIG.

[0028] 6, the car 28 and counterweight 30 of the machine room-less elevator 24A to be dismantled are installed inside an elevator tower 50. Reference numeral 52 denotes an overhead, reference numeral 54 denotes an elevator pit, reference numeral 56 denotes a control panel, and reference numeral 58 denotes a buffer.

[0029] First, the crane 11 is set up (S100 in FIG. 1). Next, the car 28 of the elevator 24A is stopped at the bottom (S102 in FIG. 1). Then, the power supply to the elevator 24A is cut off (S104 in FIG. 1). This is step 1 shown in FIG. 1, and the state of this step 1 is shown in FIG. 6.

[0030] Next, the working frame 10 is assembled on top of the existing car 28 (S106 in FIG. 1). This is step 2 shown in FIG. 1, and the state of this step 2 is shown in FIG. 7. The working frame 10 is manufactured according to the model and size (passenger or freight) of the elevator to be dismantled, and is assembled and installed. The opening 14 of the working frame 10 is manufactured with the opening position changed depending on the elevator.

[0031] Next, the crane 11 and the working frame 10 are connected with the frame rope 40, and the existing cage 28 is raised (S108 in FIG. 1). Then, the counterweight 30 is dismantled (S110 in FIG. 1). This is step 3 shown in FIG. 1, and the state of this step 3 is shown in FIG. 8.

[0032] Then, the wire rope 38 connecting the car 28 and the counterweight 30 is dismantled (S112 in FIG. 1). This is step 4 shown in FIG. 1, and the state of step 4 is shown in FIG. 9. Up to this point, the work is basically the work of the elevator technician.

[0033] Next, if an elevator technician is working, they will dismantle the car 28, but work subsequent to dismantling the car 28 can be done by other contractors. After dismantling the car 28, the inside of the elevator tower 50 is dismantled. The dismantling process inside the elevator tower 50 includes dismantling the wiring, dismantling the elevator hall (dismantling the hall jambs and the doors on the building side, etc.), and dismantling the switches and buttons.

[0034] When the dismantling of the car 28 is entrusted to demolition workers, the work frame 10 is dismantled in advance (S114A in FIG. 1), and any fallen objects are removed beforehand and handed over to the demolition workers (S116A in FIG. 1). Then, the demolition workers dismantle the car 28 (S118A in FIG. 1). This is step 5 shown in FIG. 1, and the state of this step 5 is shown in FIG. 10. After that, the demolition workers dismantle the wiring, the elevator landing, etc. Then, the building, etc. is demolished by the demolition workers.

[0035] On the other hand, if the elevator workers dismantle the elevator directly without handing over to the demolition workers, the elevator workers dismantle car 28 (S114B in FIG. 1). Then, the elevator workers dismantle the wiring (S116B in FIG. 1), and dismantle the elevator hall including elevator doors 27 (such as dismantling the hall jambs) (S118B in FIG. 1). Then, guide rails 33 are dismantled from above (S120B in FIG. 1). This is step 6 shown in FIG. 1, and the state of this step 6 is shown in FIG. 11.

[0036] Next, the working frame 10 is dismantled (S122B in FIG. 1). Furthermore, the inside of the elevator pit 54 is dismantled (S124B in FIG. 1). This is step 7 shown in FIG. 1, and the state of this step 7 is shown in FIG. 12.

[0037] Next, the machine room and machinery are dismantled (S126B in FIG. 1). Since the machine-room-less elevator 24A does not have a machine room, the remaining machinery is dismantled. This is step 8 shown in FIG. 1, and the state of this step 8 is shown in FIG. 13. In this way, only the elevator 24A can be dismantled cleanly and safely, leaving the building walls 26. In this way, according to the present invention, only the elevator can be dismantled without destroying the building itself, so only the elevator 24A can be dismantled cleanly and safely by elevator technicians.

[0038] <In the case of elevators with machine rooms> FIG. 14 is a cross-sectional view showing another embodiment of the elevator dismantling method of the present invention, illustrating the dismantling method for an elevator with a machine room 24B. In FIG. 14, a work frame 10 of the present invention is provided above the car 28 of the elevator 24B to be dismantled, and a worker O rides on the work frame to perform the dismantling work. In FIG. 14, reference numeral 60 denotes the elevator machine room. The elevator machine room 60 houses a machine room lifting hook 62, a hoist 64, a control panel 66, and the like. Reference numeral 67 denotes the machine room floor where the elevator rope holes are formed. The rest of the basic configuration is the same as that of the machine room-less elevator 24A.

[0039] Next, a method for dismantling the machine room elevator 24B by the elevator dismantling method of the present invention will be described with reference to FIG. 1 and FIGS. 15 to 22. FIG.

[0040] In FIG. 15, the car 28 and counterweight 30 of the elevator with machine room 24B to be dismantled are installed inside the elevator tower 50.

[0041] First, the lifting machine 11 is installed (S100 in FIG. 1). Next, the car 28 of the elevator 24B is stopped at the bottom (S102 in FIG. 1). Then, the power supply to the elevator 24A is shut off (S104 in FIG. 1). In the case of an elevator 24B with a machine room, the installation of the lifting machine 11 (S100 in FIG. 1) can be a later process. That is, after assembling the working frame 10 described below, the electric winch / endless winder can be connected to the working frame through the elevator rope hole using the lifting hook 62 in the machine room 60 or a portal type (see arrow in FIG. 1). This is step 1 shown in FIG. 1, and the state of this step 1 is shown in FIG. 15.

[0042] Next, the working frame 10 is assembled on top of the existing car 28 (S106 in FIG. 1). This is step 2 shown in FIG. 1, and the state of this step 2 is shown in FIG. 16. As with the elevator 24A without a machine room, the working frame 10 for the elevator 24B with a machine room is manufactured according to the model and size (passenger or freight) of the elevator to be dismantled, and then assembled and installed. The opening 14 of the working frame 10 is manufactured in a position that varies depending on the elevator.

[0043] Next, the crane 11 and the working frame 10 are connected with the frame rope 40, and the existing cage 28 is raised (S108 in FIG. 1). Then, the counterweight 30 is dismantled (S110 in FIG. 1). This is step 3 shown in FIG. 1, and the state of this step 3 is shown in FIG. 17.

[0044] Then, the wire rope 38 connecting the car 28 and the counterweight 30 is dismantled (S112 in FIG. 1). This is step 4 shown in FIG. 1, and the state of step 4 is shown in FIG. 18. Up to this point, the work is basically the work of the elevator technician.

[0045] Next, if elevator mechanics are to work, they will dismantle the car 28, but the work after dismantling the car 28 can be done by other contractors.

[0046] When the dismantling of the car 28 is entrusted to demolition workers, the work frame 10 is dismantled in advance (S114A in FIG. 1), and any fallen objects are removed beforehand and handed over to the demolition workers (S116A in FIG. 1). Then, the demolition workers dismantle the car 28 (S118A in FIG. 1). This is step 5 shown in FIG. 1, and the state of this step 5 is shown in FIG. 19. After that, the demolition workers dismantle the wiring, the elevator landing, etc. Then, the building, etc. is demolished by the demolition workers.

[0047] On the other hand, if the elevator workers dismantle the elevator directly without handing over to the demolition workers, the elevator workers dismantle car 28 (S114B in FIG. 1). Then, the elevator workers dismantle the wiring (S116B in FIG. 1), and dismantle the elevator hall including elevator doors 27 (such as dismantling the hall jambs) (S118B in FIG. 1). Then, guide rails 33 are dismantled from above (S120B in FIG. 1). This is step 6 shown in FIG. 1, and the state of step 6 is shown in FIG. 20.

[0048] Next, the working frame 10 is dismantled (S122B in FIG. 1). Furthermore, the inside of the elevator pit 54 is dismantled (S124B in FIG. 1). This is step 7 shown in FIG. 1, and the state of this step 7 is shown in FIG. 21.

[0049] Next, the machine room and machinery equipment are dismantled (S126B in FIG. 1). This is step 8 shown in FIG. 1, and the state of step 8 is shown in FIG. 22. In this way, elevator 24B can be dismantled cleanly and safely, leaving building walls 26. In this way, according to the present invention, only the elevator can be dismantled without destroying the building itself, so elevator technicians can dismantle only elevator 24B cleanly and safely. [Explanation of symbols]

[0050] 10: work frame, 11: lifting machine, 12: work floor, 14: opening, 16: handrail, 18a: guide rail engagement part, 18b: guide rail engagement part, 20: elevator guide shoe, 22: fall prevention catch box, 24: elevator, 24A: elevator without machine room, 24B: elevator with machine room, 26: building wall, 27: elevator door on building side, 28: existing car, 29: elevator opening, 30: counterway Thread, 32: counter frame, 33: guide rail, 34: weight, 36: counterweight guide rail, 38: wire rope, 40: frame rope, 42, 44, 46: pulley, 48: hoist, 50: elevator tower, 52: overhead, 54: elevator pit, 56: control panel, 58: buffer, 60: elevator machine room, 62: machine room lifting hook, 64: hoist, 66: control panel, 67: machine room floor, O: worker.

Claims

1. a step of placing the counterweight above the existing car of the elevator to be dismantled; A step of cutting off the power supply of the elevator to be dismantled; a step of assembling a work frame above an existing car of the elevator to be dismantled; raising the working frame; Dismantling the counterweight; Dismantling a wire rope connecting an existing car of the elevator to be dismantled and the counterweight; dismantling an existing car of the elevator to be dismantled; Including, How to dismantle an elevator.

2. The dismantling method according to claim 1, further comprising the step of installing a lifting machine before the working frame assembling step or after the working frame assembling step.

3. The dismantling method according to claim 1, further comprising the step of dismantling the interior of the elevator tower after the step of dismantling the counterweight.

4. 2. The dismantling method according to claim 1, further comprising the step of dismantling a guide rail of an existing elevator car from above after the step of dismantling the counterweight.

5. The dismantling method according to claim 1 , further comprising a working frame dismantling step of dismantling a working frame after the counterweight dismantling step.

6. The dismantling method according to claim 1 , further comprising, after the counterweight dismantling step, an elevator hall dismantling step of dismantling an elevator hall.

7. The dismantling method according to claim 1, further comprising a pit dismantling step of dismantling the inside of the pit after the counterweight dismantling step.

8. A working frame used in the elevator dismantling method according to claim 1, A work frame including a work platform and a fall prevention catch block that can be attached to an existing guide rail.

Images