Elevator car lifting mechanism

Abstract

To provide an elevator cage lifting mechanism capable of draining water in a pit from a landing of a lowermost floor by lifting a cage with a simple structure and preventing a hoisting machine and the cage from being damaged promptly.SOLUTION: In a lifting mechanism 30 of an elevator 10 in which a hoisting machine 21 is provided in a pit 13, the lifting mechanism 30 of a cage 11 of the elevator 10 can drain water in a pit 13 from a landing of a lowermost floor by lifting the cage 11 when the pit 13 is submerged while the cage 11 is stopped at the lowermost floor. The lifting mechanism 30 is provided below the cage 11 inside the pit 13 and has a lifting part 31 extending upward by being fed with compressed air to lift the cage 11.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an elevator cab lifting mechanism that, in an elevator with a hoist installed in the pit, lifts the cab to enable drainage of the pit from the landing on the lowest floor when the pit becomes flooded while the cab is stopped on the lowest floor. [Background technology]

[0002] In recent years, machine room-less elevators have become the mainstream for home elevators. Furthermore, drum retraction elevators are becoming the mainstream among machine room-less elevators. A home elevator is an elevator whose car only moves up and down within the apartment. A machine room-less elevator is an elevator that does not have a machine room on the roof, and the hoist is installed in a pit. A pit is a space below the floor level of the lowest floor where the elevator stops. A drum retraction elevator is an elevator in which the hoist winds a wire rope around a drum to raise and lower the car.

[0003] Incidentally, elevator pits can become flooded due to disasters such as heavy rain, floods, or river overflows. When the pit is flooded, the water that has accumulated in the pit must be drained to the outside. In order to drain the water that has accumulated in the pit to the outside, a drainage hose connected to a drainage pump from the landing must be inserted into the pit. In this case, if the car is stopped at the lowest floor, the drainage hose cannot be inserted into the pit, so the car must be raised.

[0004] However, due to the power outage caused by the flooding, the motor cannot drive the hoist. Furthermore, because workers cannot enter the pit, they cannot rotate the hoist manually. In this situation, the drainage work of the pit cannot proceed, and there is a risk of damage to the hoist and car.

[0005] In the past, in such situations, workers would assemble scaffolding above the car and attach a separate lifting device near the return car that was suspending the car, thereby pulling the car upward. This work required time for preparing the equipment, transporting the equipment, and lifting the car, and because it involved lifting a heavy object, workers had to work carefully and with great care, resulting in poor work efficiency.

[0006] Furthermore, in order to solve the above-mentioned problems, for example, Patent Document 1 discloses an elevator that includes a flood sensor and a hoist mounted on a base that can be raised and lowered, and when the flood sensor detects flooding, the hoist is raised by the base. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-096981 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the elevator disclosed in Patent Document 1 requires installation space for the base that can be raised and lowered, and the installation of the flood sensor and the base that can be raised and lowered increases costs.If the pit is flooded, it would be sufficient if a simple configuration could be used to lift the car and make the pit drainable from the landing on the lowest floor.

[0009] An object of the present invention is to provide an elevator car lifting mechanism that, in an elevator having a hoist installed in a pit, can lift the car with a simple configuration to enable drainage of water from the pit from the landing on the lowest floor when the pit is flooded while the car is stopped on the lowest floor, and can quickly prevent damage to the hoist and car. [Means for solving the problem]

[0010] The elevator cab lifting mechanism of the present invention is an elevator cab lifting mechanism that, in an elevator with a hoist installed in a pit, lifts the cab to enable drainage of the pit from the lowest floor landing when the pit is flooded while the cab is stopped at the lowest floor, and is characterized in that the lifting mechanism has a lifting section that is installed below the cab in the pit and extends upward when compressed air is supplied to lift the cab.

[0011] The elevator car lifting mechanism of the present invention is characterized in that the lifting section is cylindrical and is arranged to surround the car buffer installed in the pit, and extends upward when compressed air is fed into it to lift the car, and the lifting mechanism further comprises a compressed air supply section that feeds compressed air from the landing on the lowest floor to the lifting section, and a high-pressure hose that connects the lifting section and the compressed air supply section. [Effects of the Invention]

[0012] According to the elevator car lifting mechanism of the present invention, in an elevator having a hoist installed in a pit, if the pit becomes flooded while the car is stopped on the lowest floor, the car can be lifted with a simple configuration, making it possible to drain the pit from the landing on the lowest floor, and quickly prevent damage to the hoist and car. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic diagram showing an elevator according to an embodiment. [Figure 2] This is a schematic diagram showing an elevator with the car stopped at the lowest floor and the pit flooded. [Figure 3] FIG. 2 is a schematic diagram illustrating a lifting mechanism according to an embodiment; [Figure 4] FIG. 10 is a schematic diagram illustrating a lifting mechanism according to another embodiment. [Figure 5] FIG. 2 is a schematic diagram showing a state in which the elevator car is lifted by the lifting mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present invention will be described in detail. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating understanding of the present invention, and can be appropriately changed according to the application, purpose, specifications, etc.

[0015] "Elevator" An elevator 10 according to an embodiment will be described with reference to FIG.

[0016] As shown in FIG. 1, elevator 10 is, for example, a home elevator, which is a machine room-less elevator. Elevator 10 is also a drum winding elevator. A home elevator is an elevator in which a car room 11 moves up and down only within a residence. A machine room-less elevator is an elevator that does not have a machine room on the roof, and a hoisting machine 21 is installed in a pit 13. A drum winding elevator is an elevator in which a wire rope 15 is wound around a drum by the hoisting machine 21 to raise and lower the car room 11.

[0017] Elevator 10 loads passengers into cab 11, raises and lowers cab 11 in response to passenger requests, and stops at landings 14 on each floor. Elevator 10 has a hoistway 12 that extends vertically within the building, and a pit 13 located below hoistway 12.

[0018] The hoistway 12 accommodates a wire rope 15 having one end fixed to the top of the car chamber 11 and the other end fixed to the ceiling of the hoistway 12, and return sheaves 17 and 18 which serve as driven sheaves that are rotatably suspended and fixed at a distance from the ceiling of the hoistway 12. The wire rope 15 is wound from the car chamber 11 around the return sheave 17, the return sheave 18, and the drum of the hoisting machine 21 in that order. A landing door 23 is provided between the hoistway 12 and the landing 14.

[0019] Pit 13 is a space below the floor level of the lowest floor where elevator 10 stops. Pit 13 is provided with a hoist 21 that winds up or pays out wire rope 15 to raise or lower car chamber 11, a shock absorber 22 that absorbs shock when car chamber 11 descends into pit 13, and a lifting section 31 of lifting mechanism 30, the details of which will be described later. Hoist 21 is driven by a motor, the rotation of which is controlled by a control panel. Hoist 21 can also be rotated manually.

[0020] "Flooding in the elevator pit" A case where the pit 13 of the elevator 10 is flooded will be described with reference to FIG.

[0021] As shown in Figure 2, the pit 13 of the elevator 10 may become flooded due to a disaster such as heavy rain, flooding, or river overflow. When the pit 13 is flooded, the water accumulated in the pit 13 must be drained to the outside. In order to drain the water accumulated in the pit 13 to the outside, a drainage hose connected to a drainage pump from the landing 14 must be inserted into the pit 13. In this case, if the car 11 is stopped on the lowest floor, the drainage hose cannot be inserted into the pit 13, so the car 11 must be raised.

[0022] However, due to a power outage caused by the flooding, the hoisting machine 21 cannot be driven by a motor. Furthermore, because workers cannot enter the pit 13, the hoisting machine 21 cannot be rotated manually. In this situation, the drainage work of the pit 13 cannot proceed, and there is a risk of damage to the hoisting machine 21 and the car chamber 11. In such a case, the car chamber 11 is lifted by a lifting mechanism 30, the details of which will be described later.

[0023] "Lifting mechanism" A lifting mechanism 30 according to an example of the embodiment will be described with reference to FIGS.

[0024] As described above, in elevator 10 in which hoisting machine 21 is provided in pit 13, lifting mechanism 30 is a mechanism that lifts car 11 to enable drainage of water from pit 13 from landing 14 on the lowest floor when pit 13 is flooded while car 11 is stopped at the lowest floor. Lifting mechanism 30 has a simple configuration that lifts car 11 to enable drainage of water from landing 14 on the lowest floor, thereby quickly preventing damage to hoisting machine 21 and car 11.

[0025] As shown in FIG. 3, the lifting mechanism 30 includes a lifting unit 31, which will be described in detail later, a high-pressure cylinder 32 as a compressed air supply unit, and a high-pressure hose 33.

[0026] The lifting section 31 expands upward when compressed air is fed into it, thereby lifting the car chamber 11. The lifting section 31 is configured in a cylindrical shape so as to surround the shock absorber 22 below the car chamber 11. The lifting section 31 is preferably arranged so that the shock absorber 22 is located at the center of the cylindrical lifting section 31. With this configuration, when the lifting section 31 expands, the shock absorber 22 acts as a core to prevent the lifting section 31 from buckling.

[0027] The lifting section 31 is usually folded at a position lower than the height of the shock absorber 22. This configuration does not interfere with the original role of the shock absorber 22, which is to absorb shock when the car chamber 11 descends.

[0028] Each lifting portion 31 has a base portion 31A and an expandable portion 31B, the details of which will be described later.

[0029] The base portion 31A is formed in an annular shape and is fixed to the pit 13 so as to surround the shock absorber 22. The base portion 31A is preferably arranged so that the shock absorber 22 is located at the center of the annular base portion 31A. The base portion 31A is preferably formed from a metal such as aluminum or SUS. The base portion 31A prevents the lifting portion 31 from floating in the water accumulated in the pit 13 and moving from its correct installation position when the pit 13 is flooded.

[0030] The expandable portion 31B is cylindrical and fixed to the upper surface of the base portion 31A. The expandable portion 31B is hollow, and the outer and inner peripheral surfaces of the expandable portion 31B are formed in an expandable bellows shape. The expandable portion 31B is preferably made of a waterproof material such as rubber or resin. The expandable portion 31B also preferably has pressure resistance that can withstand the pressure of the compressed air being fed in. A connection portion 31C to which the high-pressure hose 33 is connected is provided on the outer peripheral surface of the expandable portion 31B.

[0031] 4, the expandable portion 31B may have a cylindrical upper expandable portion 31F and a cylindrical lower expandable portion 31G having a larger diameter than the upper expandable portion 31F. With this configuration, when compressed air is sent into the expandable portion 31B, the larger diameter of the lower expandable portion 31G allows more water accumulated in the pit 13 to be drained.

[0032] The high-pressure cylinder 32 sends compressed air from the landing 14 on the lowest floor to the lifting section 31. The high-pressure cylinder 32 may be stored in a different location and, if the pit 13 is flooded, carried by a worker and connected to the high-pressure hose 33. Note that a compressor may be used instead of the high-pressure cylinder 32.

[0033] The high-pressure hose 33 connects the lifting section 31 provided in the pit 13 with the high-pressure cylinder 32 installed on the landing 14 on the lowest floor. The high-pressure hose 33 preferably has pressure resistance that can withstand the pressure of the compressed air being sent in. The high-pressure hose 33 has a connection valve 33A to which the high-pressure cylinder 32 is connected, a horizontal section 33B, a corner section 33C, a vertical section 33D, a corner section 33E, and a horizontal section 33F connected to the connection section 31C of the lifting section 31.

[0034] The connection valve 33A is preferably provided at the lower end of the frame (three-sided jamb) of the landing door 23 of the landing 14 on the lowest floor. Furthermore, the connection valve 33A is preferably provided in a space covered by a lid or the like and is normally not visible. The corner portions 33C and 33E are preferably formed from a hard material such as metal or plastic. The horizontal portion 33B, the vertical portion 33D, and the horizontal portion 33F are preferably formed from a soft material such as rubber or vinyl.

[0035] Here, for example, if the high-pressure hose 33 were made only of a soft material, it would be difficult to form a curved path and it would not be possible to connect the landing 14 and the pit 13 in the shortest possible way, resulting in a long path. Therefore, by forming only the corner portions 33C and 33E of a hard material, as in the case of the high-pressure hose 33, a curved path can be formed, thereby making it possible to connect the landing 14 and the pit 13 in the shortest possible way.

[0036] Lifting procedure The procedure for lifting the car 11 using the lifting mechanism 30 will be described with reference to FIG.

[0037] As described above, if the pit 13 becomes flooded while the car 11 is stopped on the lowest floor, the lifting mechanism 30 will lift the car 11. First, an operator connects the high-pressure cylinder 32 to the connection valve 33A of the high-pressure hose 33 and sends compressed air to the expansion section 31B. At this time, multiple small high-pressure cylinders 32 may be connected in sequence to send compressed air. Then, the expansion section 31B to which the compressed air is sent will extend upward, thereby lifting the car 11.

[0038] As the car 11 is lifted, a gap is formed between the landing 14 on the lowest floor and the car 11. A worker inserts a drainage hose connected to a drainage pump through the gap and drains the pit 13. After the pit 13 has been drained, the worker further pumps compressed air into the extension section 31B to lift the car 11, thereby widening the gap between the landing 14 on the lowest floor and the car 11, and enters the pit 13 through the gap to inspect the hoist 21 and the car 11.

[0039] "effect" According to the lifting mechanism 30, in an elevator 10 in which a hoisting machine 21 is provided in a pit 13, if the pit 13 becomes flooded while the car room 11 is stopped at the lowest floor, the lifting mechanism 30 can lift the car room 11 with a simple configuration, making it possible to drain the pit 13 from the landing 14 on the lowest floor, and preventing damage to the hoisting machine 21 and the car room 11 at an early stage.

[0040] Furthermore, the lifting mechanism 30 can drain the water accumulated in the pit 13 by the volume of compressed air pumped into it.

[0041] Furthermore, the lifting mechanism 30 has a simple configuration and can be retrofitted to an existing elevator 10.

[0042] Furthermore, with the lifting mechanism 30, even a person without specialized knowledge of elevator 10 maintenance and inspection can lift the car 11 simply by connecting the high-pressure cylinder 32 to the connection valve 33A and opening the connection valve 33A. This reduces deterioration of the car 11 due to flooding.

[0043] It should be noted that the present invention is not limited to the above-described embodiment and its modifications, and various changes and modifications are possible within the scope of the claims of this application. [Explanation of symbols]

[0044] 10 elevator, 11 car room, 12 elevator shaft, 13 pit, 14 landing, 15 wire rope, 16 counterweight, 17 return wheel, 18 return wheel, 19 return wheel, 20 hoisting wheel, 21 hoisting machine, 22 buffer, 23 landing door, 30 lifting mechanism (lifting mechanism of car room), 31 lifting section, 31A base section, 31B telescopic section, 31C connection section, 31F upper telescopic section, 31G lower telescopic section, 32 high-pressure cylinder (compressed air supply section), 33 high-pressure hose, 33A connection valve, 33B horizontal section, 33C corner section, 33D vertical section, 33E corner section, 33F horizontal section

Claims

1. In an elevator having a hoist installed in a pit, when the pit is flooded while the elevator is stopped at the lowest floor, a lifting mechanism for the elevator car lifts the elevator car to enable drainage of the pit from a landing on the lowest floor, the lifting mechanism is provided below the car chamber in the pit and has a lifting section that extends upward when compressed air is fed therein to lift the car chamber. Elevator car lifting mechanism.

2. 2. The elevator car lifting mechanism according to claim 1, the lifting section is cylindrical, is provided so as to surround the buffer of the car room provided in the pit, and extends upward when compressed air is fed therein to lift the car room; The lifting mechanism further includes a compressed air supply unit that supplies compressed air from the landing on the lowest floor to the lifting unit, and a high-pressure hose that connects the lifting unit and the compressed air supply unit. Elevator car lifting mechanism.

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