Rope replacement method and switch device

Abstract

The invention provides a rope replacing method and a switch device. An operator who takes up an old rope and sends out a new rope at a landing can stop rotation of a driving rope wheel by himself / herself. In the installation step, a recovery container (14) and a new rope (5N) are installed in a landing (11). In the switch connection step, a switch device (20) is connected to a landing indicator (12) provided in a landing (11). In the rope connection step, the end of the new rope (5N) and the end of the old rope (5U) are connected. In the rope replacement step, a driving sheave (8a) is rotated by using an operation device (13), while an old rope (5U) is recovered to a recovery container (14), and a new rope (5N) is sent out from a landing (11). When the drive sheave (8a) is rotated by the operation of the operation device (13), the hoist (8) is stopped when the switch device (20) is stopped.

Description

Technical Field

[0001] This disclosure relates to methods for replacing ropes and switching devices. Background Technology

[0002] Patent Document 1 describes a method for replacing elevator ropes. In conventional replacement methods, firstly, one end of the old rope is connected to the end of the new rope. Then, the old rope is pulled towards the other end. As a result, the new rope moves in a manner that follows the old rope, and the new rope is positioned appropriately.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6847319 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In elevator systems, ropes are wound around the drive sheave of the traction machine. In conventional replacement methods, the old and new ropes are moved by rotating the drive sheave; the old rope is retrieved at a landing, and the new rope is delivered from that landing. However, since the operator of the traction machine is not located at that landing, they cannot stop the rotation of the drive sheave themselves if the retrieval of the old rope or the delivery of the new rope is not smooth.

[0008] This disclosure was made to solve the aforementioned problems. The object of this disclosure is to provide a rope replacement method in which workers can stop the rotation of the drive pulley themselves during the retrieval of old ropes and the delivery of new ropes at a working station, and a switching device used in such a replacement method.

[0009] Methods for solving problems

[0010] The disclosed rope replacement method is a method for replacing old ropes with new ropes in a machine-room-less elevator system, which includes: a car that moves in a shaft; an old rope suspending the car; and a traction machine having a drive sheave on which the old rope is wound. The method includes: a setup step of setting up a retrieval container for retrieving the old rope and a new rope at a first landing where the car stops; a switch connection step of connecting a switch device to a landing indicator at the first landing, the switch device being used to stop the traction machine by performing a stop operation; a rope connection step of connecting the end of the new rope to the end of the old rope; and a rope replacement step, after the rope connection step, of using an operating device for manually operating the traction machine to rotate the drive sheave while retrieving the old rope into the retrieval container and delivering the new rope from the first landing. When the drive sheave is rotated by operating the operating device, the traction machine stops if the switch device is stopped.

[0011] The disclosed switching device is a switching device capable of being connected to a landing indicator, which includes: a landing connector; and a short-circuit connector, which is detachable from the landing connector and used to conduct a circuit for enabling the elevator traction machine to operate by being installed on the landing connector. The switching device includes: a switch connector capable of connecting to the landing connector; and an operating unit connected to the switch connector via a cable. When the switch connector is connected to the landing connector, the circuit is in a conducting state unless a specific stop operation is performed on the operating unit; if a stop operation is performed on the operating unit, the circuit is disconnected.

[0012] Invention Effects

[0013] According to this disclosure, when replacing elevator ropes, the workers at the landing can stop the rotation of the drive pulley themselves while retrieving the old rope and sending out the new rope. Attached Figure Description

[0014] Figure 1 This is a diagram showing an example of an elevator system.

[0015] Figure 2 This is a flowchart illustrating the rope replacement method of Embodiment 1.

[0016] Figure 3 This is a diagram illustrating how to replace the rope.

[0017] Figure 4 This is a diagram showing an example of a switching device according to Embodiment 1.

[0018] Figure 5 This is a diagram showing an example of a switching device according to Embodiment 1.

[0019] Figure 6This is a flowchart illustrating a specific example of a switch connection process.

[0020] Label Explanation

[0021] 1: Elevator assembly; 2: Car; 3: Counterweight; 4: Shaft; 4a: Pit; 5: Rope; 5a-5b: End; 6a-6b: Suspension sheave; 7a-7b: Reverse sheave; 8: Traction machine; 8a: Drive sheave; 9: Suspension sheave; 10: Control device; 11: Landing station; 12: Landing station indicator; 12a: Direction button; 12b: Display; 13: Operating device; 14: Retrieval container; 15: Delivery device; 16: Pulley; 17: Guide rope; 18: Pulley; 19: Buffer; 20: Switching device; 21: Switch connector; 22: Cable; 23: Housing; 24: Button. Detailed Implementation

[0022] The following is a detailed description with reference to the accompanying drawings. Repetitive descriptions have been simplified or omitted where appropriate. In the drawings, the same reference numerals denote the same or equivalent parts.

[0023] Implementation method 1.

[0024] Figure 1 This diagram illustrates an example of an elevator assembly 1. The elevator assembly 1 includes a car 2 and a counterweight 3. The car 2 moves vertically within a shaft 4. The counterweight 3 also moves vertically within the shaft 4. The shaft 4 is a vertically extending space formed within a building. The car 2 and counterweight 3 are suspended within the shaft 4 by ropes 5. As an example, rope 5 is a cable.

[0025] As an example, Figure 1 This refers to a so-called machine-room-less elevator unit 1, which does not have a machine room located above shaft 4. Additionally, as an example, Figure 1 Elevator device 1, representing a 2:1 rope winding method.

[0026] exist Figure 1 In the example shown, one end 5a of rope 5 is connected to a fixed body at the top of hoistway 4. Rope 5 is wound sequentially around suspension sheave 6a, suspension sheave 6b, anti-cord sheave 7a, drive sheave 8a, anti-cord sheave 7b, and suspension sheave 9, starting from end 5a. The other end 5b of rope 5 is connected to a fixed body at the top of hoistway 4. Suspension sheaves 6a and 6b are rotatably mounted on the lower part of car 2. Anti-cord sheaves 7a and 7b are rotatably mounted on the top of hoistway 4. Suspension sheave 9 is rotatably mounted on the upper part of counterweight 3.

[0027] The traction machine 8 has a drive pulley 8a. The control device 10 controls the traction machine 8. That is, the movement of the car 2 is controlled by the control device 10. Figure 1This illustrates an example where the traction machine 8 and control device 10 are positioned in the pit 4a of the shaft 4. The traction machine 8 and control device 10 can be positioned anywhere within the shaft 4.

[0028] The car 2 is stopped at multiple landings 11 within the building by the control device 10. Hereinafter, the uppermost landing of the landings 11 where the car 2 can stop will also be referred to as "landing 11H". The lowermost landing of the landings 11 where the car 2 can stop will also be referred to as "landing 11L".

[0029] Each floor 11 is equipped with a floor indicator 12. The floor indicator 12 has directional buttons 12a. The floor indicator 12 may also have a display 12b.

[0030] Additionally, the floor indicator 12 located at the lowest floor station 11L has a floor connector and a short-circuit connector (neither shown) in a position not visible to the average user. Hereinafter, the floor indicator located at floor station 11L will also be referred to as "floor indicator 12L". For example, the floor connector and short-circuit connector are revealed by removing the decorative panel of floor indicator 12L. The floor connector is a connector fixed inside floor indicator 12L. The floor connector may also be a connector for a substrate. The short-circuit connector can be attached to and detached relative to the floor connector. The short-circuit connector forms part of a circuit for enabling the traction machine 8 to operate. This circuit is, for example, a safety circuit. Hereinafter, this circuit will also be referred to as "circuit C".

[0031] If the short-circuit connector is installed at the landing connector, circuit C is open, enabling the traction machine 8 to operate. For example, if the short-circuit connector is installed at the landing connector, power is supplied to the traction machine 8 normally. On the other hand, if the short-circuit connector is not installed at the landing connector, circuit C is open, preventing the traction machine 8 from operating. For example, if the short-circuit connector is not installed at the landing connector, power cannot be supplied to the traction machine 8.

[0032] When personnel performing maintenance or other work on the elevator unit 1 enter the pit 4a of the shaft 4, they disconnect the short-circuit connector from the landing connector at the landing 11L. This allows the personnel to safely perform their work within the pit 4a.

[0033] Additionally, the operating device 13 is connected to the car 2 via a cable. The operating device 13 is a device for manually operating the traction machine 8. For example, personnel performing maintenance on the elevator system 1 can rotate the drive sheave 8a in one direction or the other by operating the operating device 13.

[0034] Next, regarding Figure 1The method for replacing the old rope 5 with a new rope 5 in the elevator device 1 shown will be described in detail below. Hereinafter, the old rope to be replaced will also be referred to as "old rope 5U". The new rope will also be referred to as "new rope 5N".

[0035] Figure 2 This is a flowchart illustrating the method for replacing rope 5 in Embodiment 1. Figure 3 This diagram illustrates how to replace rope 5.

[0036] In the setup process shown in S101, the operator sets up a recycling container 14 for retrieving old rope 5U and a new rope 5N at the lowest level station 11L. Figure 3 In the example shown, the new rope 5N is disposed on the floor 11L in a state of being housed in the delivery device 15. In addition, the recovery container 14 is disposed on the delivery device 15.

[0037] In the rope connection process shown in S102, the operator connects one end of the new rope 5N to one end of the old rope 5U. This end of the old rope 5U that connects to the new rope 5N is the end of the old rope 5U that extends upwards from the suspension sheave 9 above the counterweight 3. This end of the old rope 5U can also be... Figure 1 The end 5b shown is cut off and a new end is made. This end of the old rope 5U is connected to the end of the new rope 5N after passing through the additionally installed pulley 16.

[0038] Figure 3 This illustrates an example where the other end of the old rope 5U is connected to the guide rope 17 for rope retrieval. This end of the old rope 5U connected to the guide rope 17 is the end of the old rope 5U that extends upwards from the suspension wheel 6a at the bottom of the car 2. This end of the old rope 5U could also be... Figure 1 The end 5a shown is cut off and a new end is made. This end of the old rope 5U is connected to the end of the guide rope 17 after passing through the additionally installed pulley 18.

[0039] also, Figure 3 This example illustrates the use of three ropes 5 in elevator assembly 1. The number of ropes 5 used in elevator assembly 1 may not necessarily be three.

[0040] In the switch connection process shown in S103, the operator connects the switch device 20 to the landing indicator 12L installed at landing 11L. The switch device 20 is a device used to stop the traction machine 8 by performing a specific stop operation. The switch device 20 can be connected to the landing indicator 12L, which is equipped with a landing connector.

[0041] Figure 4 and Figure 5This is a diagram showing an example of the switching device 20 in Embodiment 1. Figure 4 This is a side view of the switching device 20. Figure 5 This is a top view of the switching device 20. The switching device 20 includes, for example, a switch connector 21, a cable 22, a housing 23, and a button 24.

[0042] Switch connector 21 can be connected to the landing connector. Button 24 is supported on housing 23. Button 24 is connected to switch connector 21 via cable 22. Button 24 is an example of an operating part operated by the operator to stop the traction machine 8. Switch device 20 may also have an operating part using a method other than button type. Figure 4 and Figure 5 In the example shown, when button 24 is pressed, it remains pressed until a specific release operation is performed. For example, the pressed state of button 24 is released by rotating it clockwise or counterclockwise. Alternatively, an operation other than rotating button 24 may be requested as the release operation.

[0043] Figure 6 This is a flowchart illustrating a specific example of the switch connection process. In the switch connection process shown in S103, the operator first removes the decorative panel (S201) from the main body of the landing indicator 12L. This exposes the short-circuit connector that connects to the landing connector.

[0044] In the disconnection process shown in S202, the operator removes the short-circuit connector from the floor connector. This disconnects circuit C.

[0045] The connector connection process shown in S203 is performed after the disconnection process shown in S202. In the connector connection process, the operator connects the switch connector 21 of the switch device 20 to the floor connector after the short-circuit connector has been removed.

[0046] When switch connector 21 is connected to the landing connector, circuit C is in a conducting state unless the switch device 20 is stopped. That is, circuit C is in a conducting state if button 24 is not pressed. On the other hand, when switch connector 21 is connected to the landing connector, circuit C is disconnected if the switch device 20 is stopped. That is, circuit C is disconnected if button 24 is pressed.

[0047] Figure 3 This indicates the state after the rope connection process shown in S102 and the switch connection process shown in S103 have been performed. The rope connection process can also be performed after the switch connection process. The rope connection process and the switch connection process can also be performed in parallel.

[0048] In addition, Figure 3In the shown configuration, the new rope 5N and guide rope 17 are connected to the old rope 5U. In this configuration, the car 2 is supported by a lifting device (not shown) and is not supported by the old rope 5U. Furthermore, the counterweight 3 is supported by a buffer 19 installed in the pit 4a. Therefore, by moving the old rope 5U in the A direction, it is possible to retrieve the old rope 5U into the retrieval container 14 and send the new rope 5N from the delivery device 15 into the hoistway 4.

[0049] However, if from Figure 3 If the state shown only allows the old rope 5U to move in direction A, the old rope 5U will get caught in the groove of the drive sheave 8a, preventing the old rope 5U and the new rope 5N from moving smoothly. Therefore, in the rope replacement process shown in S104 after the rope connection process, an operator uses the operating device 13 to rotate the drive sheave 8a while moving the old rope 5U in direction A. As a result, the old rope 5U is retrieved into the retrieval container 14, and the new rope 5N is delivered from the delivery device 15 into the shaft 4.

[0050] Furthermore, the operating device 13 is preferably connected to the car 2 via a cable of sufficient length to allow operation from above the car 2 and from the adjacent landing 11. Operators can operate the operating device 13 from above the car 2 or from landing 11H. Operators can also operate the operating device 13 from landing 11H at the initial stage of the cable connection process, and subsequently, the same operator or other operators can operate the operating device 13 from above the car 2.

[0051] In the rope replacement process, at station 11L, one or more operators perform the tasks of retrieving the old rope 5U and feeding out the new rope 5N. When the drive sheave 8a rotates via the operation of the operating device 13, the traction machine 8 stops if the stop device 20 is operated. Therefore, the operator at station 11L can stop the movement of the old rope 5U and the new rope 5N by operating the stop device 20. That is, the operator presses button 24 to stop the movement of the old rope 5U and the new rope 5N. Thus, the operator can stop the movement of the old rope 5U and the new rope 5N, i.e., the rotation of the drive sheave 8a, without relying on the operator of the operating device 13.

[0052] For ease of operation, the cable 22 of the switchgear 20 preferably has a length that allows the housing 23 to be placed on the floor of the landing 11L when the switch connector 21 is connected to the landing connector. Furthermore, workers at the landing 11L frequently crouch down to perform tasks such as retrieving old rope 5U and sending out new rope 5N. Therefore, regarding the switchgear 20, to allow workers to stop the operation while crouching, it is preferable that the button 24 is positioned upwards when the housing 23 is placed on the floor of the landing 11L with the switch connector 21 connected to the landing connector.

[0053] In the machine-room-less elevator system 1, the working space is limited, and during the rope replacement process, it is often difficult to operate the operating device 13, retrieve the old rope 5U, and deliver the new rope 5N in the same location. That is, the operating device 13 is mostly operated outside the landing 11L. In the example shown in this embodiment, even under such circumstances, the operator retrieving the old rope 5U and delivering the new rope 5N at landing 11L can stop the rotation of the drive pulley by himself.

[0054] In this embodiment, a preferred example of connecting the switch device 20 to the landing indicator 12L of the lowest landing station 11L is described. As another example, when retrieving old rope 5U and sending out new rope 5N at landing station 11 on the lobby floor, the switch device 20 can also be connected to the landing indicator 12L provided at that landing station 11. In this case, it is preferable that the landing indicator 12L provided at landing station 11 on the lobby floor has a landing connector.

[0055] Hereinafter, examples of the modes that may be included in this disclosure are explicitly described as appendices.

[0056] (Note 1)

[0057] A method for replacing ropes, comprising replacing old ropes with new ropes in a machine-room-less elevator system, the machine-room-less elevator system comprising:

[0058] The elevator car moves within the shaft;

[0059] The old ropes that suspended the car; and

[0060] A traction machine having a drive sheave on which the old rope is wound, wherein...

[0061] The method for replacing the rope includes:

[0062] The setup process involves setting up a recycling container for retrieving the old rope and the new rope at the first floor where the car stops;

[0063] In the switch connection process, the switch device is connected to the floor indicator located at the first floor station. The switch device is used to stop the traction machine by performing a stop operation.

[0064] The rope connection process involves connecting the end of the new rope to the end of the old rope; and

[0065] In the rope replacement process, following the rope connection process, the old rope is retrieved into the recycling container while the drive rope pulley is rotated using a manually operated mechanism for the traction machine, and the new rope is discharged from the first station.

[0066] When the drive sheave rotates by operating the operating device, the traction machine stops if the stop operation is performed on the switching device.

[0067] (Note 2)

[0068] According to the rope replacement method described in Appendix 1, wherein,

[0069] The first level station is the lowest level station.

[0070] The floor indicator has the following features:

[0071] Floor station connectors; and

[0072] A short-circuit connector, which is detachable from the landing connector, is used to conduct the circuitry that enables the traction machine to operate when installed on the landing connector.

[0073] The switching device includes a switch connector that can be connected to the floor connector.

[0074] The switch connection process includes:

[0075] The disconnection process involves removing the short-circuit connector from the floor connector to disconnect the circuit; and

[0076] In the connector connection process, after the disconnection process, the switch connector is connected to the floor station connector.

[0077] When the switch connector is connected to the floor connector, the circuit is in a conducting state if the stop operation is not performed on the switch device; if the stop operation is performed on the switch device, the circuit is disconnected.

[0078] (Note 3)

[0079] According to the rope replacement method described in Appendix 1 or 2, wherein,

[0080] The operating device is connected to the car via a cable and can be operated from above the car and from the landing adjacent to the car.

[0081] (Note 4)

[0082] The method for replacing the rope according to any one of Appendices 1 to 3, wherein,

[0083] During the rope replacement process, the operating device is operated from a location other than the first floor station.

Claims

1. A method for replacing a rope in a machine-room-less elevator system, wherein the machine-room-less elevator system comprises: The elevator car moves within the shaft; The old ropes that suspend the car; as well as A traction machine having a drive sheave on which the old rope is wound, wherein... The method for replacing the rope includes: The setup process involves setting up a recycling container for retrieving the old rope and the new rope at the first floor where the car stops; In the switch connection process, the switch device is connected to the floor indicator located at the first floor station. The switch device is used to stop the traction machine by performing a stop operation. The rope connection process involves connecting the end of the new rope to the end of the old rope; and In the rope replacement process, following the rope connection process, the old rope is retrieved into the recycling container while the drive rope pulley is rotated using a manually operated mechanism for the traction machine, and the new rope is discharged from the first station. When the drive sheave rotates by operating the operating device, the traction machine stops if the stop operation is performed on the switching device.

2. The method for replacing the rope according to claim 1, wherein, The first level station is the lowest level station. The floor indicator has the following features: Floor station connector; as well as A short-circuit connector, which is detachable from the landing connector, is used to conduct the circuitry that enables the traction machine to operate when installed on the landing connector. The switching device includes a switch connector that can be connected to the floor connector. The switch connection process includes: The disconnection process involves removing the short-circuit connector from the floor station connector to disconnect the circuit. as well as In the connector connection process, after the disconnection process, the switch connector is connected to the floor station connector. When the switch connector is connected to the floor connector, the circuit is in a conducting state if the stop operation is not performed on the switch device; if the stop operation is performed on the switch device, the circuit is disconnected.

3. The method for replacing the rope according to claim 1 or 2, wherein, The operating device is connected to the car via a cable and can be operated from above the car and from the adjacent landing.

4. The method for replacing the rope according to claim 1 or 2, wherein, During the rope replacement process, the operating device is operated from a location other than the first floor station.

5. A switching device capable of being connected to a landing indicator, the landing indicator comprising: Floor station connector; as well as A short-circuit connector, detachable from the landing connector, is used to conduct the circuitry that enables the elevator traction machine to operate, via its installation on the landing connector. The switching device includes: A switch connector that can be connected to the floor station connector; as well as The operating unit is connected to the switch connector via a cable. When the switch connector is connected to the floor connector, the circuit is in a conducting state if the operation unit is not subjected to a specific stop operation, and the circuit is disconnected if the operation unit is subjected to the stop operation.

6. The switching device according to claim 5, wherein, The operating part is a button. When the switch connector is connected to the floor connector, if the button is not pressed, the circuit is in a conductive state; if the button is pressed, the circuit is disconnected. When the button is pressed, the button remains pressed until a specific release operation is performed.

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