Governor rope replacement auxiliary device and governor rope replacement method

Abstract

To provide a replacement assist device of a governor rope and a replacement method of the governor rope capable of replacing the governor rope of an elevator without requiring an assistance person working at a pit.SOLUTION: A replacement assist device of a governor rope includes a support member 32 fixed at a position where the operation can be performed from above a car in a hoistway of an elevator and a pulling-up device 34 which is supported by the support member 32 and holds a tension pulley 28 while the tension pulley is pulled up to the height at which the tension of a governor rope 26 is released. When an old rope of the governor rope 16 is replaced with a new rope, an operator operates the pulling-up device 34 from above the car such that the tension pulley 18 is pulled up to the height where the tension of the governor rope 16 is released and held. After replacing the old rope with the new rope, the operator operates the pulling-up device 34 from above the car to lower the tension pulley 18 so that the tension is given to the new rope.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an elevator governor rope replacement auxiliary device and a governor rope replacement method. [Background technology]

[0002] Elevators are equipped with a governor that constantly monitors the speed of the car ascending and descending in the hoistway and brings the car to an emergency stop if the car becomes overspeeding. This governor is generally configured to detect the moving speed of a governor rope linked to the car by the rotational speed of a sheave around which the governor rope is wound, and to bring the car to an emergency stop when the rotational speed of the sheave reaches a specified upper limit.

[0003] In order to operate the governor in this way, it is necessary to reliably transmit the movement of the governor rope to the sheave. The governor rope tensioning device is provided for this purpose, and has the function of applying a specified tension to the governor rope to generate the necessary friction between the governor rope and the sheave, thereby linking the sheave to the movement of the governor rope.

[0004] Patent Document 1 discloses a technology for a tensioning device for a governor rope. The tensioning device of this technology is configured so that a slider is fixed to a mounting plate fixed to the end of an arm, and the slider can slide up and down relative to a guide rail. This configuration is said to be capable of responding to the up and down movement of the tensioning wheel caused by the expansion and contraction of the governor rope while maintaining the positional relationship between the tensioning wheel, tensioning wheel weight, arm, and mounting plate. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-40323 Summary of the Invention [Problem to be solved by the invention]

[0006] The governor rope is replaced periodically to ensure the safe operation of the elevator. The governor rope is tensioned by a tension wheel device. For this reason, when replacing the governor rope, in addition to the worker on the car, an assistant must be deployed in the pit to pull up the tension wheel device and release the tension.

[0007] The present disclosure has been made to solve the problems described above, and aims to provide a governor rope replacement auxiliary device and a governor rope replacement method that enable the replacement of an elevator governor rope without the need for auxiliary personnel working in a pit. [Means for solving the problem]

[0008] The governor rope replacement auxiliary device disclosed herein is an replacement auxiliary device for replacing a governor rope that is stretched endlessly between a governor provided in a machine room of an elevator hoistway and a tension wheel provided in a pit of the hoistway so as to be movable in the vertical direction, and includes a support member that is fixed in the hoistway at a position that allows operation from above the car, and a lifting device that is supported by the support member and holds the tension wheel in a state where it is lifted up to a height at which the tension of the governor rope is released. The lifting device includes a lifting rope having one end fixed to the tensioner and the other end having a hook attached thereto, and a hook receiver supported by a support member for hanging the hook. The hook receiver has a hooking portion for hanging the hook. The lifting rope is adjusted in length so that the tensioner can be pulled up with the hook hooked on the hooking portion. The lifting device further includes an elastic member attached so as to hang down from the hook receiver, and a permanent hook provided on the other end of the elastic member for hanging the hook while the lifting device is not in use. It is something.

[0009] In addition, the governor rope replacement method disclosed herein is a method for replacing the governor rope from an old rope to a new rope using the replacement auxiliary device, and includes the steps of moving the car to a position where the lifting device can be operated from above the car, operating the lifting device from above the car to pull up and hold the tension wheel to a height at which the tension of the governor rope is released, replacing the old rope with the new rope by connecting an end of the old rope to an end of the new rope and letting out the new rope from above the car, and applying tension to the new rope by operating the lifting device from above the car to lower the tension wheel. Effect of the Invention

[0010] According to the governor rope replacement auxiliary device and the governor rope replacement method using the replacement device disclosed herein, a worker on the car can operate the lifting device to lift and hold the tension wheel to a height at which the tension of the governor rope is released, making it possible to replace the elevator governor rope without the need for an auxiliary worker working in the pit. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of an elevator apparatus according to an embodiment. [Diagram 2] FIG. 13 is a diagram for explaining the procedure for replacing a governor rope using the replacement assist device of the embodiment. [Diagram 3] 1 is a flowchart showing a procedure for replacing a governor rope using the replacement assist device of an embodiment. [Figure 4] FIG. 13 is a diagram showing a modified example of the pulling device according to the embodiment. [Diagram 5] 13 is a diagram showing a state in which an operator has hooked a hook into a hole in a hook receiver in a lifting device of a modified embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment will be described with reference to the drawings. In addition, elements common to the various drawings are given the same reference numerals, and duplicated explanations will be omitted.

[0013] Embodiment 1 1. Configuration of the elevator device according to the embodiment FIG. 1 is a diagram showing an example of an elevator apparatus according to an embodiment. The elevator apparatus 100 is applied to, for example, a building having a plurality of floors. A hoistway 3 for the elevator apparatus 100 is provided in the building. The hoistway 3 is a vertically long space that spans a plurality of floors. A landing 10 is provided at each of the plurality of floors. In this example, a machine room 3a is provided above the hoistway 3. A pit 3b is provided at the bottom of the hoistway 3.

[0014] The elevator device 100 includes a car 1 and a counterweight 2. The car 1 has a plurality of panel members connected to each other to form an internal space. The car 1 moves up and down in a hoistway 3. The counterweight 2 moves up and down on the back side of the car 1 in the hoistway 3. The car 1 and the counterweight 2 are suspended in the hoistway 3 by main ropes 4.

[0015] The main rope 4 is wound around a drive sheave 6 of a hoist 5. When the drive sheave 6 rotates, the main rope 4 moves in a direction corresponding to the direction in which the drive sheave 6 rotates. The car 1 rises or falls depending on the direction in which the main rope 4 moves. The movement of the car 1 is guided by a guide rail 7.

[0016] The guide rails 7 are provided in a straight line in the vertical direction. The guide rails 7 are arranged from the pit 3b of the hoistway 3 to the top of the hoistway 3. The car 1 is arranged between the two guide rails 7.

[0017] The car 1 is equipped with an emergency stop 8. The emergency stop 8 is a device that forcibly stops the travel of the car 1. The emergency stop 8 stops the travel of the car 1 by pinching the guide rail 7, for example.

[0018] The counterweight 2 moves in a hoistway 3 on the rear side of the car 1 in a direction opposite to the direction in which the car 1 moves. The movement of the counterweight 2 is guided by a guide rail 9.

[0019] The guide rails 9 are provided in a straight line in the vertical direction. The guide rails 9 are arranged from the pit 3b of the hoistway 3 to the top of the hoistway 3. The counterweight 2 is arranged between the two guide rails 9.

[0020] In this way, the car 1 and the counterweight 2 are suspended in a bucket shape by the main ropes 4 so as to rise and fall in opposite directions within the hoistway 3. In other words, the main ropes 4 suspend the car 1 and the counterweight 2 within the hoistway 3 by a 1:1 roping method.

[0021] The elevator device 100 includes a governor 12. The governor 12 includes a governor sheave 14, a governor rope 16, a tension wheel 18, an attachment portion 20, a connecting arm 22, and a gripping device 24. The governor sheave 14 is disposed, for example, in a machine room 3a. The governor rope 16 is a rope that is endlessly wound around the governor sheave 14 and the tension wheel 18. The tension wheel 18 is disposed, for example, in a pit 3b. The tension wheel 18 is a sheave that applies tension to the governor rope 16 by, for example, the weight of a weight 26 attached to the tension wheel 18. The tension wheel 18 is attached to the guide rail 9 via an arm 28 so as to be movable in the vertical direction. That is, the tension wheel 18 is configured to be movable only in the vertical direction by the arm 28.

[0022] There is no limitation on the configuration of the tension wheel 18. In other words, the tension wheel 18 can adopt various known structures as long as it is configured to apply and release tension to the governor rope 16 by moving up and down. In addition, the guide rail to which the tension wheel 18 is attached via the arm 28 is not limited to the guide rail 9 for guiding the counterweight 2, but may be the guide rail 7 for guiding the car 1.

[0023] The attachment portion 20 is a portion that attaches the governor rope 16 to the car 1. The attachment portion 20 may hold both ends of the governor rope 16 to make the governor rope 16 into a loop. The connecting arm 22 is a device that connects the governor rope 16 and the emergency stop 8 of the car 1. The governor rope 16 moves in conjunction with the running of the car 1 via the attachment portion 20. At this time, the governor sheave 14 rotates in conjunction with the movement of the governor rope 16. The gripping device 24 is a device that grips the governor rope 16 when the rotation speed of the governor sheave 14 exceeds a reference speed. When the gripping device 24 grips the governor rope 16, the movement of the governor rope 16 stops. At this time, the emergency stop 8 is activated via the connecting arm 22, thereby stopping the running of the car 1.

[0024] Here, the governor rope 16 is replaced with a new rope, for example, when it is damaged or when its period of use exceeds its useful life. In the following description, the governor rope 16 before replacement is called the "old rope," and the new governor rope 16 to be replaced is called the "new rope." In replacing the governor rope 16, a worker on the car 1 removes the attachment part 20 and replaces the old rope with a new rope. However, these operations must be performed after releasing the tension applied to the governor rope 16 by the tension wheel 18. For this reason, another worker is required in the pit 3b to perform operations such as pulling up and holding the tension wheel 18 as necessary, which poses a problem in terms of work efficiency.

[0025] The elevator system 100 of this embodiment includes an exchange assist device 30 for the governor rope 16 as a device for solving the above-mentioned problems. The exchange assist device 30 is a device for assisting a worker on the car 1 in performing work such as pulling up and holding the tension pulley 18. The exchange assist device 30 mainly includes a support member 32 and a pulling device 34 supported by the support member 32.

[0026] The support member 32 functions as a bracket for fixing the lifting device 34 to the guide rail 9 as a fixed member in the elevator 3. The support member 32 extends horizontally so that one end is fixed to the guide rail 9 and the other end is located directly above the tensioning sheave 18. There are no limitations on the shape and material of the support member 32 as long as it has a structure that allows the lifting device 34 to be fixed directly above the tensioning sheave 18. The guide rail to which the support member 32 is fixed may be the guide rail 7 for guiding the car 1. The support member 32 may be configured to be detachable from the guide rail 9 so that it can be installed only during replacement work, or may be fixed to the guide rail 9 as a permanent bracket.

[0027] The lifting device 34 is a lifting device that has a lifting function for lifting an object fixed to the end of the lifting rope 36, and a holding function for holding the lifting rope 36 at any position. Examples of such a lifting device 34 include hoists, chain blocks, and other hoisting devices that have a function for winding up the lifting rope 36. There is no limitation on the type of power source for the lifting device 34, and any of a manual type, an electric type, and a hydraulic type may be adopted.

[0028] The tip end of the lifting rope 36 of the lifting device 34 is attached to the arm 28 of the tensioner 18. By winding up the lifting rope 36 with the lifting device 34, the tensioner 18 and the weight 26 are pulled upward together with the arm 28. This releases the tension on the governor rope 16.

[0029] There is no limitation on the vertical positions at which the support member 32 and the lifting device 34 are arranged. However, the stopping position of the car 1 when replacing the governor rope 16 is set to a position that allows access from the hall 10 to the top of the car. For this reason, it is preferable that the vertical position of the support member 32 is fixed to a position that allows an operator on the car to operate the lifting device 34. It is also preferable that the stopping position of the car 1 is a position that allows access to the top of the car from the hall 10 on the lowest floor possible. This is because the lower the stopping position of the car 1 is, the shorter the lifting rope 36 of the lifting device 34 can be made.

[0030] 2. Method for replacing governor rope using replacement auxiliary device 30 Next, a procedure for replacing the governor rope 16 from an old rope to a new rope using the replacement auxiliary device 30 will be described. Note that the procedure will be described here when the replacement auxiliary device 30 is permanently installed.

[0031] FIG. 2 is a diagram for explaining the procedure for replacing the governor rope using the replacement assist device of this embodiment. FIG. 3 is a flowchart showing the procedure for replacing the governor rope using the replacement assist device of this embodiment. An operator replaces the governor rope 16 according to the procedure of the flowchart shown in FIG. 3. First, in a preparation process shown in step S100, an operator stops the car 1 at a position where the car top 1a of the car 1 can be accessed from the landing 10 on the second floor. The stopping position of the car 1 here corresponds to a position where the lifting device 34 can be operated from the car top 1a. This allows the operator to access the car top 1a from the landing 10 on the second floor and operate the lifting device 34.

[0032] In the next step S102, a lifting process, an operator operates the lifting device 34 from above the car 1a to lift the tension wheel 18. The lifting height here is set to a predetermined height h that is a height at which the tension of the governor rope 16 is released. Then, with the tension wheel 18 in the lifted state, the operator activates the holding function of the lifting device 34 to hold the tension wheel 18.

[0033] The next replacement process includes the procedures of steps S104 to S108. In step S104, the worker removes the attachment part 20 attached to the car 1, and removes the end of the old rope from the attachment part 20. In the next step S106, the worker temporarily connects the end of the new rope to the end of the old rope. Then, the worker winds the new rope around the governor sheave 14 of the governor 12 and the sheave of the tension wheel 18 by letting out the new rope.

[0034] In the next step S108, the worker connects both ends of the new rope to the attachment parts 20, thereby connecting the new rope in an endless manner. Then, the worker attaches the attachment parts 20 to the car 1.

[0035] In the next step S110, a hoisting process, an operator operates the lifting device 34 from above the car 1a to lower the tension wheel 18. Then, the operator releases the holding function of the lifting device 34. As a result, the tension wheel 18 is placed in a state in which it applies tension to the governor rope 16 and is free to move up and down in response to the expansion and contraction of the governor rope 16.

[0036] According to the above-described procedure for replacing the governor rope 16 using the replacement auxiliary device 30, the governor rope 16 can be replaced from the old rope to a new rope without stationing an operator in the pit 3b. Also, in the work of adjusting the clearance between the tensioning sheave 18 and the pit 3b, the tensioning sheave 18 can be pulled up by the lifting device 34, which increases the efficiency of the adjustment work. Furthermore, since there is no need to station an operator in the pit 3b, this also contributes to improving work safety.

[0037] In the above-mentioned procedure for replacing the governor rope 16, the procedure for replacing the governor rope 16 has been described with reference to the case where the replacement auxiliary device 30 is permanently installed, but the replacement auxiliary device 30 does not have to be permanently installed. If the replacement auxiliary device 30 is not permanently installed, the worker may install the replacement auxiliary device 30 from above the car 1a after the process of step S100.

[0038] 3. Modifications of the exchange assist device 30 The exchange assist device 30 of this embodiment may be modified as follows.

[0039] 3-1. Lifting device 34 The lifting device 34 does not have to have a function of winding up the lifting rope 36 like a hoist or a chain block. Fig. 4 is a diagram showing a modification of the lifting device of this embodiment. The lifting device 34 of the modification shown in Fig. 4 includes a lifting rope 36 having one end fixed to the arm 28 of the tensioner 18, a hook 38 provided on the other end of the lifting rope 36, and a hook receiver 40 for hanging the hook 38.

[0040] The hook receiver 40 is a member that extends in the vertical direction and is fixed to the tip end of the support member 32. A permanent hook receiver 44 is provided at the lower end of the hook receiver 40 via a spring 42 serving as an elastic member. The permanent hook receiver 44 is for hanging the hook 38 on it to keep it in a permanent position while the exchange auxiliary device 30 is not in use. The spring 42 is attached so as to hang down from the hook receiver 40. The spring 42 is intended to absorb the vertical movement of the hook 38 that accompanies the vertical movement of the tensioner 18 and to prevent the hook 38 from falling due to slack in the lifting rope 36.

[0041] The hook receiver 40 is provided with a plurality of holes 46 in the vertical direction. The plurality of holes 46 are an example of a hooking portion for holding the tension wheel 18 in a raised state by hanging the hook 38 thereon. The plurality of holes 46 may each be configured as a notched hole with an open end. This configuration makes it easier to hang the hook 38. The hooking portion is not limited to holes, and may be configured as a protrusion for hanging the hook 38.

[0042] The length of the pulling rope 36 is adjusted so that the tension wheel 18 can be pulled up by hooking the hook 38 into the hole 46 of the hook receiver 40. The pulling rope 36 expands and contracts due to aging and other factors. The multiple holes 46 are provided to make it possible to adjust the amount of pulling according to the expansion and contraction of the pulling rope 36.

[0043] In the lifting process, the worker lifts the tension wheel 18 by pulling the hook 38 upward. Then, the worker holds the tension wheel 18 by hooking the hook 38 into the hole 46 of the hook receiver 40. Fig. 5 is a diagram showing a state in which the worker has hooked the hook 38 into the hole 46 of the hook receiver 40 in a lifting device according to a modification of this embodiment. With this configuration, it is possible to realize a lifting device 34 that has a lifting weight function and a locking function even if it does not have a hoisting function. [Explanation of symbols]

[0044] 1 car, 1a car top, 3 elevator shaft, 3a machine room, 3b pit, 4 main rope, 5 hoist, 6 driving sheave, 7 guide rail, 9 guide rail, 10 landing, 12 governor, 14 governor sheave, 16 governor rope, 18 tension wheel, 20 attachment portion, 22 connecting arm, 24 gripping device, 26 weight, 28 arm, 30 replacement auxiliary device, 32 support member, 34 lifting device, 36 lifting rope, 38 hook, 40 hook receiver, 42 spring, 44 permanent hook receiver, 46 hole, 100 elevator device

Claims

1. An auxiliary replacement device for replacing a governor rope that is stretched endlessly between a governor installed in a machine room of an elevator hoistway and a tension wheel that is installed in a pit of the elevator hoistway so as to be movable in the vertical direction, A support member fixed to the elevator at a position where the support member can be operated from above the elevator car; a lifting device supported by the support member for lifting the tension wheel to a height at which the tension of the governor rope is released and holding the tension wheel in that state; Equipped with The lifting device is A lifting rope having one end fixed to the tension wheel and the other end having a hook attached thereto; a hook receiver supported by the support member and for hanging the hook, The hook receiver includes a hook portion for hooking the hook, The length of the lifting rope is adjusted so that the tension wheel can be lifted up with the hook hooked on the hook portion, an elastic member attached so as to hang down from the hook receiver; a permanent hook provided on the other end of the elastic member for hanging the hook while the lifting device is not in use; The governor rope replacement auxiliary device further comprises:

2. The hook portion includes a plurality of holes arranged in the vertical direction.

2. The governor rope replacement auxiliary device according to claim 1.

3. The support member is configured to be detachable from a fixed member of the elevator shaft. The governor rope replacement auxiliary device according to claim 1 or 2.

4. A method for replacing an old governor rope with a new rope by using an auxiliary device for replacing a governor rope that is endlessly stretched between a governor installed in a machine room of an elevator shaft and a tension wheel installed in a pit of the elevator shaft so as to be freely movable in the vertical direction, the method comprising: The exchange auxiliary device is A support member fixed to the elevator at a position where the support member can be operated from above the elevator car; a lifting device supported by the support member for lifting the tension wheel to a height at which the tension of the governor rope is released and holding the tension wheel in that state; Equipped with The exchange method includes: moving the car to a position where the lifting device can be operated from above the car; a step of operating the lifting device from above the car to lift and hold the tension wheel to a height at which the tension of the governor rope is released; a step of replacing the old rope with the new rope by connecting an end of the old rope with an end of the new rope and sending out the new rope from above the cage; a step of applying tension to the new rope by operating the lifting device from above the car to lower the tensioner; A method for replacing a governor rope comprising:

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