JP2022126286A - Replacement assist device of governor rope and replacement method of governor rope - Google Patents

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 The present disclosure relates to an elevator governor rope replacement auxiliary device and a governor rope replacement method.

An elevator is equipped with a speed governor that constantly monitors the speed of a car ascending and descending in a hoistway, and makes an emergency stop of the car when the car is overspeeded. In general, this governor detects the moving speed of the governor rope interlocked with the car by the rotation speed of the sheave around which the governor rope is wound, and the rotation speed of this sheave is the specified upper limit value. is configured to bring the car to an emergency stop when the

In order to operate the governor in this way, it is necessary to reliably transmit the movement of the governor rope to the sheave. A tension pulley device for the governor rope is provided for this purpose. It has the function of generating force and interlocking the sheave with the movement of the governor rope.

Patent Literature 1 discloses a technique of a tension pulley device for a speed governor rope. The tension pulley device of this technique has a slider fixed to a mounting plate fixed to the end of an arm so that the slider can slide vertically with respect to a guide rail. According to this configuration, it is possible to cope with the vertical movement of the tension wheel, etc. caused by the expansion and contraction of the governor rope while maintaining the positional relationship of the tension wheel, the tension wheel weight, the arm, and the mounting plate. .

JP-A-9-40323

The governor rope is replaced periodically for safe elevator operation. Here, tension is applied to the governor rope by a pulley device. Therefore, in the replacement work of the governor rope, it is necessary to allocate an assistant to pull up the tension pulley device in the pit to release the tension, in addition to the workers on the car.

SUMMARY OF THE INVENTION The present disclosure has been made to solve the above-described problems, and provides a governor rope for making it possible to replace the governor rope of an elevator without the need for auxiliary personnel working in the pit. It is an object of the present invention to provide an auxiliary replacement device for a speed governor rope and a method for replacing the speed governor rope.

A speed governor rope replacement auxiliary device of the present disclosure is provided between a speed governor provided in a machine room of a hoistway of an elevator and a tension pulley provided movably in the vertical direction in a pit of the hoistway. A replacement auxiliary device for replacing an endlessly stretched speed governor rope, comprising: a support member fixed at a position in a hoistway allowing operation from above a car; and a hoisting device for holding the tension wheel in a state where it is hoisted to a height where the tension of the governor rope is released.

Further, the method for exchanging the governor rope of the present disclosure is a method for exchanging the governor rope from the old rope to the new rope using the replacement auxiliary device, and the lifting device is operated from above the car. A process of moving the car to a possible position, a process of operating a lifting device from above the car to raise and hold the tension wheel to a height where the tension of the governor rope is released, and a process of removing the end of the old rope and the new rope. A process of replacing the old rope with a new rope by connecting the end of the rope and sending out the new rope from the top of the car, and a process of applying tension to the new rope by operating the lifting device from the top of the car and lowering the tension wheel. and

According to the governor rope replacement auxiliary device of the present disclosure and the governor rope replacement method using the replacement device, a worker on the car operates the hoisting device to remove the tension wheel from the governor rope. can be raised and held to a height where the tension is released. This makes it possible to replace the elevator governor rope without the need for ancillary personnel working in the pit.

It is a figure which shows the example of the elevator apparatus in embodiment. FIG. 5 is a diagram for explaining a procedure for replacing the governor rope using the replacement auxiliary device of the embodiment; 4 is a flow chart showing a procedure for replacing a governor rope using the replacement auxiliary device of the embodiment. It is a figure which shows the modification of the pulling-up apparatus of embodiment. FIG. 10 is a diagram showing a state in which an operator hooks a hook into a hole of a hook receiver in the lifting device according to the modified example of the embodiment;

Embodiments will be described below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the element which is common in each figure, and the overlapping description is abbreviate|omitted.

Embodiment 1.
1. Configuration of Elevator Apparatus According to Embodiment FIG. 1 is a diagram showing an example of an elevator apparatus according to an embodiment. Elevator apparatus 100 is applied, for example, to a building having a plurality of floors. In a building, a hoistway 3 of an elevator installation 100 is provided. The hoistway 3 is a vertically elongated space extending over a plurality of floors. A landing 10 is provided on each of the plurality of floors. In this example, a machine room 3 a is provided above the hoistway 3 . At the bottom of the hoistway 3, a pit 3b is provided.

The elevator installation 100 comprises a car 1 and a counterweight 2 . The car 1 forms an internal space by connecting a plurality of panel members to each other. The car 1 moves up and down in the hoistway 3 . The counterweight 2 moves up and down on the rear side of the car 1 in the hoistway 3 . Car 1 and counterweight 2 are suspended in hoistway 3 by main ropes 4 .

The main rope 4 is wound around the drive sheave 6 of the hoisting machine 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 ascends or descends according to the direction in which the main rope 4 moves. Movement of the car 1 is guided by guide rails 7 .

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

The car 1 has an emergency stop 8 . The emergency stop 8 is a device that forcibly stops the car 1 from running. The emergency stop 8 stops the car 1 from traveling by pinching the guide rail 7, for example.

The counterweight 2 moves in the hoistway 3 on the back 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 guide rails 9 .

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

In this manner, the car 1 and the counterweight 2 are suspended by the main rope 4 in a crane-like manner so as to move up and down in opposite directions within the hoistway 3 . That is, the main rope 4 suspends the car 1 and the counterweight 2 in the hoistway 3 by a 1:1 roping method.

The elevator apparatus 100 has a speed governor 12 . The governor 12 includes a governor sheave 14 , a governor rope 16 , a tension wheel 18 , a mounting portion 20 , a connecting arm 22 and a gripping device 24 . The governor sheave 14 is arranged, for example, in the machine room 3a. The governor rope 16 is a rope endlessly wound around the governor sheave 14 and the tension wheel 18 . The tension wheel 18 is arranged, for example, in the 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 vertically movable. That is, the tension wheel 18 is configured to be movable only in the vertical direction by the arm 28 .

The configuration of the pulley 18 is not limited. That is, the tension wheel 18 may adopt various known structures as long as they are configured to apply and release tension to the governor rope 16 by moving in the vertical direction. Further, 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.

The attachment portion 20 is a portion for attaching the governor rope 16 to the car 1 . For example, the mounting portion 20 may hold both ends of the governor rope 16 to make the governor rope 16 annular. The connecting arm 22 is a device that connects the speed governor rope 16 and the emergency stop 8 of the car 1 . The speed governor rope 16 is moved by the mounting portion 20 in conjunction with the running of the car 1 . 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 rotational 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 movement of the car 1 is stopped by operating the emergency stop 8 through the connecting arm 22 .

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

The elevator apparatus 100 of the present embodiment includes an auxiliary replacement device 30 for the governor rope 16 as a device for solving the above problems. The replacement assisting device 30 is a device for assisting the worker on the car 1 to perform operations such as pulling up and holding the tension pulley 18 . The replacement auxiliary device 30 includes, as main components, a support member 32 and a lifting device 34 supported by the support member 32 .

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 hoistway 3 . The support member 32 has one end fixed to the guide rail 9 and the other end extending horizontally so as to be positioned directly above the tension wheel 18 . The shape and material of the support member 32 are not limited as long as it has a structure that allows the lifting device 34 to be fixed directly above the pulley 18 . Also, 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 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. .

The hoisting device 34 is a hoisting device having a lifting function of lifting an object fixed to the tip of the hoisting rope 36 and a holding function of holding the hoisting rope 36 at an arbitrary position. Examples of such a hoisting device 34 include a hoist, a chain block, and the like having a function of hoisting the hoisting rope 36 . The power type of the lifting device 34 is not limited, and any of a manual type, an electric type, and a hydraulic type may be adopted.

The leading end of the lifting rope 36 of the lifting device 34 is attached to the arm 28 of the tension wheel 18 . By winding up the hoisting rope 36 with the hoisting device 34 , the tension wheel 18 and the weight 26 are hoisted upward together with the arm 28 . As a result, the tension of the governor rope 16 is released.

There is no limit to the vertical positions where the support member 32 and the lifting device 34 are arranged. However, the stop position of the car 1 when the work for replacing the speed governor rope 16 is performed is set to a position that allows access from the landing 10 to the top of the car. For this reason, the vertical position of the support member 32 is preferably fixed at a position where the operator on the car can operate the lifting device 34 . Moreover, it is preferable that the stop position of the car 1 be a position that allows access to the top of the car from the landing 10 on the lowest floor possible. This is because the lower the stop position of the car 1, the shorter the hoisting rope 36 of the hoisting device 34 can be.

2. Method for Replacing Governor Rope Using Replacement Auxiliary Device 30 Next, a procedure for replacing the old rope with a new rope using the replacement auxiliary device 30 will be described. Here, a work procedure in the case where the replacement auxiliary device 30 is permanently installed will be described.

FIG. 2 is a diagram for explaining the procedure for replacing the governor rope using the replacement auxiliary device of the present embodiment. FIG. 3 is a flow chart showing procedures for exchanging the governor rope using the auxiliary exchange device of the present embodiment. The operator replaces the governor rope 16 according to the procedure of the flowchart shown in FIG. First, in the preparation process shown in step S100, the worker stops the car 1 at a position where the upper car 1a of the car 1 can be accessed from the landing 10 on the second floor. The stop position of the car 1 here corresponds to a position where the hoisting device 34 can be operated from the upper car 1a. As a result, the worker can access the upper car 1a from the hall 10 on the second floor and operate the hoisting device 34. - 特許庁

In the lifting process shown in the next step S102, the worker operates the lifting device 34 from the upper car 1a to lift the tension pulley 18. As shown in FIG. Here, the lifting height is set to a prescribed height h which is prescribed in advance as a height at which the tension of the governor rope 16 is released. Then, the operator actuates the holding function of the lifting device 34 in a state in which the tension wheel 18 is pulled up to hold the tension wheel 18 .

The next replacement process includes steps S104 to S108. In step S<b>104 , the worker removes the attachment portion 20 attached to the car 1 and removes the end of the old rope from the attachment portion 20 . In the next step S106, the worker temporarily splices 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 sending out the new rope.

In the next step S<b>108 , the operator attaches both ends of the new rope to the attachment portions 20 to connect the new rope endlessly. Then, the worker attaches the attachment portion 20 to the car 1 .

In the lowering step shown in the next step S110, the worker operates the lifting device 34 from the top 1a of the car to lower the tension pulley 18. As shown in FIG. The worker then releases the holding function of the lifting device 34 . As a result, the tension wheel 18 applies tension to the governor rope 16 and is placed in a state in which it can move vertically in accordance with the expansion and contraction of the governor rope 16 .

According to the replacement procedure of the governor rope 16 using the replacement auxiliary device 30 as described above, the governor rope 16 can be replaced from the old rope to the new rope without placing workers in the pit 3b. . Also, in the work of adjusting the clearance between the tension wheel 18 and the pit 3b, the tension wheel 18 can be lifted up by the lifting device 34, so the efficiency of the adjustment work is improved. Furthermore, since it is not necessary to place workers in the pit 3b, it contributes to an improvement in work safety.

In the replacement procedure of the speed governor rope 16 described above, the work procedure in the case where the replacement auxiliary device 30 is permanently installed has been described, but the replacement auxiliary device 30 does not have to be permanently installed. If the auxiliary replacement device 30 is not permanently installed, the worker may perform the step of installing the auxiliary replacement device 30 from the top 1a of the car after the step S100.

3. Modified Example of Replacement Auxiliary Device 30 The following modified aspects may be applied to the replacement auxiliary device 30 of the present embodiment.

3-1. lifting device 34
The hoisting device 34 may not have the ability to hoist the hoisting rope 36 like a hoist or chain block. FIG. 4 is a diagram showing a modification of the lifting device of the present embodiment. A lifting device 34 of a modified example shown in FIG. It is configured including a hook receiver 40 for.

The hook receiver 40 is a member that extends vertically and is fixed to the tip side of the support member 32 . A permanent hook receiver 44 is provided on the lower end side of the hook receiver 40 via a spring 42 as an elastic member. The permanent hook receptacle 44 is for permanently mounting the hook 38 while the replacement auxiliary device 30 is not used. A spring 42 is attached so as to hang down from the hook receiver 40 . The spring 42 absorbs the vertical movement of the hook 38 accompanying the vertical movement of the tension wheel 18 and prevents the hook 38 from falling due to the slackness of the hoisting rope 36 .

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 hooking the hooks 38 . It should be noted that the plurality of holes 46 may be configured as cutout holes that are open at their ends. With such a configuration, the ease of hooking the hook 38 is improved. Moreover, the hooking portion may be configured as a protrusion for hooking the hook 38 instead of being a hole.

The length of the pulling rope 36 is adjusted so that the tension wheel 18 can be pulled up by hooking the hook 38 to the hole 46 of the hook receiver 40 . Note that the lifting rope 36 expands and contracts due to factors such as aging. The plurality of holes 46 are for adjusting the lifting amount according to the extension and contraction of the lifting rope 36 .

In the lifting process, the operator pulls up the tension wheel 18 by pulling up the hook 38 upward. Then, the worker holds the tension wheel 18 by hooking the hook 38 to the hole 46 of the hook receiver 40 . FIG. 5 is a diagram showing a state in which an operator hooks the hook 38 to the hole 46 of the hook receiver 40 in the lifting device of the modified example of the present embodiment. According to such a configuration, it is possible to realize the hoisting device 34 having a lifting function and a locking function without having a hoisting function.

1 car, 1a above car, 3 hoistway, 3a machine room, 3b pit, 4 main rope, 5 hoist, 6 traction sheave, 7 guide rail, 9 guide rail, 10 platform, 12 speed governor, 14 control Speed gear sheave 16 Governor rope 18 Tension wheel 20 Mounting part 22 Connecting arm 24 Grasping device 26 Weight 28 Arm 30 Replacement auxiliary device 32 Supporting member 34 Lifting device 36 Lifting rope 38 hook 40 hook receiver 42 spring 44 permanent hook receiver 46 hole 100 elevator device

Claims (7)

Replacing the endlessly stretched speed governor rope between the speed governor provided in the machine room of the elevator hoistway and the tension wheel provided vertically movable in the pit of the hoistway. A replacement auxiliary device for
In the hoistway, a support member fixed at a position that allows operation from above the cage of the cage;
a lifting device supported by the support member for holding the tension wheel in a state of being lifted to a height at which the tension of the governor rope is released;
Auxiliary equipment for replacing the governor rope. The hoisting device includes a hoist fixed to the support member for hoisting the hoisting rope,
The tip of the lifting rope is fixed to the tension wheel,
2. The speed governor rope replacement auxiliary device according to claim 1, wherein the hoist includes a holding function for holding the lifting rope at an arbitrary position. The lifting device is
a pull-up rope having one end fixed to the tension wheel and a hook attached to the other end;
a hook receiver supported by the support member for hooking the hook;
The hook receiver has a hooking portion for hooking the hook,
2. The speed governor rope replacement auxiliary device according to claim 1, wherein the lifting rope is adjusted to have a length such that the pulley can be pulled up while the hook is hooked on the hooking portion. 4. The speed governor rope replacement auxiliary device according to claim 3, wherein the hook portion includes a plurality of vertically aligned holes. an elastic member attached so as to hang down from the hook receiver;
a permanent hook provided at the other end of the elastic member for hooking the hook while the lifting device is not in use;
5. The governor rope replacement auxiliary device according to claim 3 or 4, further comprising: The governor rope replacement assisting device according to any one of claims 1 to 5, wherein the support member is configured to be detachable from a fixing member of the hoistway. A replacement method for replacing an old rope with a new rope using the replacement auxiliary device according to any one of claims 1 to 6, comprising:
moving the car to a position where the hoisting device is operable from above the car;
a step of operating the lifting device from above the car to raise 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 the end of the old rope and the end of the new rope and sending out the new rope from the car;
a step of applying tension to the new rope by operating the lifting device from above the cage to lower the tension wheel;
A method for replacing a governor rope comprising:

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