JP2004083278A - Main rope replacing device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and economically replace a main rope by dispensing with a cure of a landing frame body and a repair of the frame body after the work. <P>SOLUTION: This main rope replacing device is provided with an attachment base 14 provided on a car 4, a drum body 15 provided on the attachment base 14 and having a rope feed drum 24 and a rope winding drum 25 connected to each other approximately uniaxially, and a connecting member 16 connecting the attachment base 14 to an exit/entrance 1c of a hoistway 1. After carrying the drum body 15 on the car 4 by the connecting member 16, a new rope is fed from the drum body 15 and the existing rope 6 is wound by the drum body 15 to prevent the damage on the landing frame in the exit/entrance 1c. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a main rope changing device of an elevator for exchanging a plurality of ropes for driving a car and a counterweight.
[0002]
[Prior art]
Conventionally, as a main rope replacement device for this elevator, a pillar was installed at the opening of the elevator landing, a winding drum for the existing rope and a delivery drum for the new rope were attached to the pillar, and the existing rope and the new rope were connected. There has been proposed a method in which a main rope is exchanged by receiving a reaction force for winding up an existing rope and sending out a new rope with the above-mentioned pillar, and winding up the existing rope while sending out a new rope (for example, Patent Reference 1).
[0003]
[Patent Document 1]
JP-A-61-287678 (pages 2, 3; FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned prior art, when exchanging the main rope, the reaction force for winding up the existing rope and sending out the new rope is received by the pillar provided at the opening of the elevator landing. May damage the frame of the elevator platform, which requires the product to be cured and repaired after the completion of the work. There was a problem.
[0005]
In addition, due to the end positions of both ends of the rope, the handling of the rope to the reaction force receiving column provided at the landing opening becomes complicated, and it becomes necessary to provide a large number of rope pulleys in the hoistway. There was also the problem that downtime and investigation costs were required.
[0006]
Furthermore, when opening an elevator platform and replacing ropes in an existing elevator, it is necessary to provide opening curing and an entrance prevention fence at the platform to ensure the safety of third parties such as users of the building. However, when the landing space is small, there is also a problem that the installation of the above-mentioned safety fence may cause difficulty in walking.
[0007]
The present invention has been made in view of the above-mentioned circumstances in the prior art, and has as its object to efficiently and economically reduce the need for curing the landing frame and repairing the frame after work. An object of the present invention is to provide an elevator main rope exchange device capable of exchanging ropes.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention according to claim 1 is characterized in that both ends are respectively connected to a rope fixing portion at an upper portion of a hoistway, and a weight pulley whose intermediate portion is provided on a counterweight, and provided at a lower portion of a car. In an elevator main rope exchanging device for exchanging a plurality of ropes sequentially wound around a pulley below a car and a hoisting sheave of a hoist, a car holding the car at an upper part of the hoistway. A holding unit, a weight holding unit that holds the counterweight at the lower part of the hoistway, a rope delivery drum that sends out a new replacement rope, and a rope winding drum that winds the rope are connected on substantially the same axis. A drum body mounted on a movable frame, a mount provided on an upper part of the car, to which the drum body is mounted; And configured to include a removable tether connecting between the entrance of.
[0009]
In the invention according to claim 1 of the present invention, a new rope for replacement is previously wound around the rope winding drum of the drum body, and the space between the mounting stand provided at the upper part of the car and the entrance of the hoistway is provided. Are connected to each other by a connecting member, and the drum body is carried into the upper part of the car through the connecting member, and then the drum body is mounted on a mounting base provided on the upper part of the car. Next, a new rope is delivered from the rope delivery drum of the drum body, and the existing rope is wound up by the rope winding drum. As a result, damage to the landing frame during replacement of the main rope can be prevented, so that the main rope can be efficiently and economically replaced without the need for curing the landing frame and repairing the frame after work. Can be. Furthermore, since the above-described rope replacement work is performed in the hoistway and there is no need to provide a safety fence at the elevator landing, walking is not hindered even in a narrow elevator landing.
[0010]
According to a second aspect of the present invention, in the first aspect, a caster is provided on the drum body.
[0011]
According to the second aspect of the present invention, the drum can be easily moved by the casters.
[0012]
The invention according to a third aspect of the present invention is the invention according to the first aspect, wherein the frame of the drum is provided rotatably on the base and the rope delivery drum and the rope winding drum. And a support table for supporting the.
[0013]
According to the third aspect of the present invention, since the connecting width of the feeding drum and the take-up drum, that is, the width of the drum body increases as the number of ropes increases, the drum body is moved up and down from the entrance of the hoistway. When the entrance of the entrance is relatively narrow, the support of the frame is rotated with respect to the base to adjust the direction of the drum body and pass through the entrance of the hoistway. Next, the drum body is transported to the upper part of the car through a connecting member using a caster, and the drum body is mounted on a mounting base provided on the upper part of the car. The direction of the drum body is adjusted by rotation, and in this state, a new rope is sent out from the rope sending drum of the drum body, and the existing rope is wound up by the rope winding drum. Thus, when the drum body is carried into the hoistway from the entrance of the hoistway, damage to the three-way frame at the entrance can be prevented, and the drum body can be easily moved by the casters. Further, by adjusting the direction of the drum body in accordance with the end positions of both ends of the rope, the rope replacement operation can be performed efficiently without using many pulleys.
[0014]
According to a fourth aspect of the present invention, in the first aspect, a roller is provided on at least one of the mounting base and the connecting member.
[0015]
In the invention according to claim 4 configured as described above, when the drum body is carried into the upper part of the car from the landing, the drum body moves on the roller provided on at least one of the mounting base and the connecting member on the upper part of the car. Therefore, the drum body can be easily carried into the upper part of the car. This makes it possible to shorten the rope replacement work in a state where the hoistway is opened, and reduce the danger to third parties such as building users.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an elevator main rope exchange device of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a longitudinal sectional view showing an elevator main rope changing device according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a process of placing a drum body on a car according to this embodiment, and FIG. FIG. 4 is a longitudinal sectional view showing a step of holding a car and a counterweight according to the present embodiment; FIG. 4 is a plan view of a rope connecting portion provided in a main rope changing device of the present embodiment; FIG. 6 is an explanatory diagram showing a wound state, FIG. 6 is an explanatory diagram of a drum body provided in the main rope exchanging device of the present embodiment, and FIG. 7 is an explanatory diagram of a rope guide provided in the main rope exchanging device of the present embodiment. It is.
[0018]
The elevator shown in FIGS. 1 to 3 has a guide rail 2 erected over the entire travel of the hoistway 1 and a car that is guided by the guide rail 2 and moves up and down between the floors 3 a and 3 n of the hoistway 1. 4, a counterweight 5 for raising and lowering the hoistway 1 relative to the car 4; a rope 6 for lifting the car 4 and the counterweight 5; and a rope 1 installed on the bottom 1a of the hoistway 1. And a hoisting machine 7 for driving the same.
[0019]
As shown in FIG. 2, the existing rope 6 has one end 6 a connected to the vicinity of the top 1 b of the hoistway 1 by a rope fixing part 9, and the middle part of the rope 6 is attached to a lower part of the car 4. A pulley 4a, a diverting pulley 8a provided on the upper beam 8 near the top 1b of the hoistway 1, a hoisting sheave 7a of the hoisting machine 7, and another diverting pulley 8b provided on the upper beam 8; The other end 6b of the rope 6 is connected to the vicinity of the top 1b of the hoistway 1 by another rope fixing portion 10 in such a manner as to be sequentially wound around a weight pulley 5a provided on the upper part of the rope.
[0020]
The main rope changing device of the present embodiment holds the car 4 near the top 1 b of the hoistway 1, such as a car holding unit, for example, the wire 11, and holds the counterweight 5 near the bottom 1 a of the hoistway 1. A weight holding portion, for example, a jack support 12, a mounting base 14 provided on the upper part of the car 4 via a bracket 13, a drum body 15 mounted on the mounting base 14, a mounting base 14, and an entrance of the hoistway 1. 1c, a rope connecting portion 18 for connecting one end 6a of at least two of the plurality of ropes 6 to one end 17a of a new rope 17, and an upper beam 8 Has temporary pulleys 21 and 22 temporarily installed via wires 19 and 20 at both ends thereof, and a rope guide 23 which is engaged with an intermediate portion of the rope 6.
[0021]
The mounting base 14 and the bracket 13 may be assembled in a frame shape (not shown) of the car 4 in a cross-girder shape, or may be a rail shape on which a caster 28 described later of the drum body 15 is mounted.
[0022]
As shown in FIG. 6, in the drum body 15, a rope delivery drum 24 for delivering a new rope 17 and a rope winding drum 25 for winding the rope 6 are connected on substantially the same axis, and these drums 24, 25 are connected to each other. It is rotatably supported in the same direction by a rotating shaft 27 supported by a frame 26. In this drum body 15, the diameter Db of the rope winding drum 25 when the rope 6 is not wound is smaller than the diameter Da of the outer periphery of the new rope 17 when the new rope 17 is completely wound around the rope delivery drum 24. Is set larger. The frame 26 has a base 29 having a plurality of casters 28 on the lower side, a support base 31 rotatably provided on the base 29 via a rotary seat 30, And a pair of support members 32 that support both ends of the shaft 27.
[0023]
As shown in FIG. 4, the diameter D of the rope connecting portion 18 is equal to or larger than the diameter d of each of the rope 6 and the new rope 17, and this diameter D is, as shown in FIG. Is set to be smaller than the gap δ between the rope groove 33 and the stopper 34.
[0024]
As shown in FIG. 7, the rope guide 23 includes a plurality of pulleys 35 around which the plurality of ropes 6 are respectively wound, a bracket 37 that rotatably supports these pulleys 35 via a rotation shaft 36, and a rotation shaft. The bracket 36 includes a connecting member 38 attached to one end of the bracket 36 and movably connected to another adjacent bracket 37, and a weight member 39 provided below the bracket 37. Accordingly, the plurality of pulleys 35 can be independently moved up and down, and in this state, the loads from the weight members 39 are applied to the plurality of ropes 6 via the respective pulleys 35.
[0025]
In the main rope exchanging device of the present embodiment, the existing rope 6 is exchanged for a new rope 17 according to the following operation procedure. That is, as a first step shown in FIG. 2, a new rope 17 for replacement is previously wound around the rope delivery drum 24 of the drum body 15, and this drum body 15 is prepared on the uppermost floor 3n, and the mounting base 14 is mounted. Is installed on the upper part 4 b of the car 4 via the bracket 13. Next, the car 4 is moved at a low speed and stopped so that the upper surface of the mounting base 14 is at the same level as the top floor 3n, and the car 4 is moved between the mounting base 14 and the top floor 3n. The connecting member 16 is installed. Next, when the frontage of the entrance 1c of the hoistway 1 is relatively narrow, the direction of the drum body 15 is adjusted by rotating the support base 31 of the frame 26 with respect to the base body 29, so that the entrance 1c of the hoistway 1 is formed. , And the drum body 15 is carried over the connecting member 16 onto the mounting base 14 of the upper part 4b of the car 4 and mounted thereon.
[0026]
Next, as a second step shown in FIG. 3, after the drum body 15 is carried into the upper part 4 b of the car 4, the connecting member 16 is removed from between the mounting stand 14 and the uppermost floor 3 n, and the rope 6 The direction of the drum body 15 is adjusted by the rotation of the frame 26 according to the end positions of both ends 6a and 6b. Next, a height at which the car 4 is moved at a low speed to remove the ends 6a and 6b of the existing rope 6 near the top 1b of the hoistway 1 and to fix the new rope 17 after replacement. The car 4 is stopped in a state where the upper part 4b of the car 4 comes to the position, and the car 4 is held at the position via the wire 11 from the rail bracket 2a. Thereafter, a jack support 12 is installed below the counterweight 5 and the counterweight 5 is raised and held by the jack support 12 so that the load of the counterweight 5 is not applied to the rope 6.
[0027]
Next, as a third step shown in FIG. 1, one end 6a of the rope 6 is detached from the rope fixing portion 9 of the top 1b of the hoistway 1, and one end 17a of the new rope 17 is taken out from the rope delivery drum 24. From around 8, the new rope 17 is wrapped around a temporary pulley 21 suspended by a wire 19, and one end 17a of the new rope 17 is connected to one end 6a of the rope 6 via a rope connecting portion 18.
[0028]
Next, as a fourth step, the other end 6b of the rope 6 is detached from the rope fixing portion 10 of the top 1b of the hoistway 1, and is wrapped around the upper beam 8 via a temporary pulley 22 suspended by a wire 20, for example. The other end 6b of the rope 6 is connected to a rope winding drum 25 installed on the upper part 4b of the car 4. At this time, the rope 6 is connected to the rope winding drum 25 so as to wind the one end 6b of the rope 6 in a direction opposite to a direction in which the new rope 17 is wound around the rope delivery drum 24. Further, the rope 6 is detached from the hoisting sheave 7a of the hoisting machine 7 at the bottom 1a of the hoistway 1 and replaced with the rope guide 23 to apply a predetermined tension to each of the plurality of ropes 6.
[0029]
Next, when a rotational force is applied to the rope delivery drum 24 by the weight of the new rope 17, this rotational force is transmitted to the rope take-up drum 25 via the rotation shaft 27, and the rope take-up drum 25 is connected to the rope delivery drum 24. Rotated in the same direction. The new rope 17 is sent out from the rope sending drum 24 by using this rotational force, and the existing rope 6 is wound on the rope winding drum 25, so that the lower cage pulley 4a, the turning pulley 8a, and the hoist through which the rope 6 passes. A new rope 17 is used in all parts of the rope guide 23 provided near the sheave 7a via the pulley 35, the turning pulley 8b, and the weight pulley 5a.
[0030]
At this time, since the new rope 17 is wound around the rope sending drum 24 by a necessary length in advance, the length (La) of the new rope 17 at which the rope sending drum 24 is sent out in one rotation is equal to the length of the rope sending drum 24. Assuming that the diameter of the outer peripheral portion of the new rope 17 in a state where the new rope 17 is completely wound is Da, La = Da × pi. On the other hand, since the existing rope 6 is not yet wound on the rope winding drum 25, the length (Lb) of the rope 6 on which the rope winding drum 25 can be wound in one rotation is determined by the diameter of the rope winding drum 25. If Db, Lb = Db × pi. Further, since the diameter Db of the rope winding drum 25 is larger than the diameter Da of the outer peripheral portion of the new rope 17 in a state where the new rope 17 of the rope sending drum 24 is wound, the rope winding drum 25 has a diameter of 1 mm. The length Lb of the rope 6 that can be wound by the rotation is longer than the length La of the new rope 17 that the rope delivery drum 24 sends out by one rotation (Lb> La), and the rope 6 is wound up more than the sending speed of the new rope 17. The speed is faster. As a result, the length of the rope during the return from the rope delivery drum 24 to the rope winding drum 25 through the pulleys of each part of the elevator becomes shorter with the rotation of the drum, and the rope guide 23 is accordingly moved from the initial position. Also rises.
[0031]
Finally, as a fifth step, when all the existing ropes 6 have been wound around the rope winding drum 25, one end 17a of the new rope 17 is cut off from the rope connection section 18, and the rope fixing section at the top 1b of the hoistway 1 is separated. The terminal is connected to the terminal 10 by terminal processing. At this time, since the rope guide 23 has risen to a position away from the hoisting sheave 7a of the hoisting machine 7, the rope feeding drum 24 is rotated by rotating the remaining new rope 17 wound on the rope feeding drum 24. And the rope guide 23 is lowered. Thereafter, the new rope 17 is replaced on the hoisting sheave 7a of the hoisting machine 7 from the rope guide 23 at the bottom 1a of the hoistway 1, and the rope guide 23 is removed. Then, the exchanging operation is completed by releasing the holding state of the car 4 and the counterweight 5 by connecting the rope to the rope fixing portion 9 of the top 1b of the hoistway 1 after cutting the terminal.
[0032]
In the present embodiment configured as described above, since the drum body 15 can be integrally carried into the upper part 4b of the car 4 from the entrance 1c of the hoistway 1 through the connecting member 16, the curing of the entrance 1c to the landing frame body. The main rope replacement work can be performed without the need for repairing the frame after work. Further, since the above-described rope replacement work is performed in the hoistway 1 and there is no need to provide a safety fence at an elevator platform such as the floor 3n, walking is not hindered even in a narrow elevator platform.
[0033]
In the present embodiment, since the direction of the drum body 15 can be adjusted by the rotation of the frame 26, when the drum body 15 is carried into the hoistway 1 from the entrance 1c of the hoistway 1, the three-way (not shown) The drum body 15 can be easily moved by the casters 28 while preventing damage to the frame and the like. Further, by adjusting the direction of the drum body 15 according to the end positions of both ends 6a and 6b of the rope 6, the rope exchange operation can be performed efficiently without using many pulleys as in the related art.
[0034]
Further, in the present embodiment, the length of the rope from the rope delivery drum 24 to the rope winding drum 25 through the pulleys of the respective sections of the elevator is reduced with the rotation of the drum, and the rope guide 23 is accordingly reduced. By ascending from the initial position, the change in the rope length can be absorbed, and the rope 6 and the new rope 17 can always be kept under a constant tension, so that the rope replacement operation can be easily performed. If the diameter Db of the rope take-up drum 25 is set to be smaller than the diameter Da of the outer periphery of the new rope 17 in a state where the new rope 17 of the rope delivery drum 24 is wound, the rope delivery speed is reduced. Since the rope winding speed is higher than the rope winding speed, an extra new rope 17 is sent out and the rope 6 is loosened, so that the rope replacement operation becomes very complicated.
[0035]
Further, in the present embodiment, when a plurality of ropes 6 are simultaneously replaced, an error occurs in winding each of the ropes 6 and 17 around the drum body 15, but the rope guide 23 can be independently moved for each rope. With such a configuration, the rope tension can be uniformly applied to each of the ropes. As a result, simultaneous replacement of a plurality of ropes 6 and 17 can be easily performed.
[0036]
Further, in the present embodiment, the rope D is connected so that the diameter D of the rope connecting portion 18 is equal to or less than the gap δ between the rope groove 33 of the weight pulley 5a and the cage lower pulley 4a and the rope stopper 34. 6 and the new rope 17 can pass without removing the rope stopper 34 at each pulley. Further, since the diameter D of the rope connecting portion 18 is connected to be equal to or larger than the diameter d of the rope 6 and the new rope 17, the rope can be replaced without coming off the rope groove 33.
[0037]
In this embodiment, since the casters 28 are provided below the frame 26 of the drum body 15, the drum body 15 can be easily moved.
[0038]
In the above-described embodiment, the case where the casters 28 are attached to the frame 26 of the drum body 15 is exemplified. However, the same effect can be obtained even when rollers are provided for the mounting base 14 and the connecting member 16. include. When the rotation of the frame 26 of the drum body 15 is not required, a caster may be provided directly below the support 31 of the frame 26.
[0039]
Further, in the above embodiment, the configuration in which the car 4 is suspended from the rail bracket 2a with the wire 11 has been described. However, other configurations may be used as long as the car 4 can be held on the top 1b of the hoistway 1. For example, the same effect can be obtained when the emergency stop device of the car 4 is used and held.
[0040]
Further, in the above-described embodiment, even when the counterweight 5 is held by the jack support 12, the counterweight 5 is held on the bottom 1a of the hoistway 1 and the tension of the rope 6 is reduced even in other configurations. The same effect can be obtained as long as it can be loosened.
[0041]
Further, in the above-described embodiment, the example in which the hoisting machine 7 is installed at the bottom 1a of the hoistway 1 in the machine room-less type elevator is shown. Even with a roomless type elevator or a 2: 1 roping elevator with a machine room, the main rope replacement work can be performed without installing a pillar in the landing frame of the entrance / exit 1c, as in the above embodiment. The effect of can be obtained.
[0042]
【The invention's effect】
As described above, in the invention according to claim 1 of the present invention, a drum body integrally formed of a rope delivery drum and a rope take-up drum is carried into a mounting table above a car from a doorway of a hoistway via a connecting member. The new rope is sent out from the rope sending drum and the existing rope is taken up by the rope take-up drum, so that the landing frame can be prevented from being damaged when replacing the main rope, and curing the landing frame. In addition, the main rope can be efficiently and economically replaced without requiring repair of the frame after the work. Furthermore, since the above-described rope replacement work is performed in the hoistway and there is no need to provide a safety fence at the elevator landing, walking is not hindered even in a narrow elevator landing.
[0043]
Further, in the invention according to claim 2 of the present invention, the drum can be easily moved by the casters.
[0044]
In the invention according to claim 3 of the present invention, since the direction of the drum body can be adjusted by rotating the frame, when the drum body is carried into the hoistway from the entrance of the hoistway, the three-way frame of the entrance is used. Damage can be prevented and the drum can be easily moved by the casters. Further, by adjusting the direction of the drum body in accordance with the end positions of both ends of the rope, the rope replacement operation can be performed more efficiently without using many pulleys.
[0045]
Further, in the invention according to claim 4 of the present invention, the drum body can be easily carried into the upper portion of the car by passing over the rollers provided on at least one of the mounting member and the connecting member on the upper portion of the car, The rope replacement work with the hoistway open can be shortened, and the danger to third parties such as building users can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an elevator main rope exchanging device according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a step of placing a drum body on a car according to the present embodiment.
FIG. 3 is a longitudinal sectional view showing a step of holding the car and the counterweight according to the embodiment.
FIG. 4 is a plan view of a rope connecting portion provided in the main rope changing device of the present embodiment.
FIG. 5 is an explanatory diagram showing a state where the rope of FIG. 4 is wound around a pulley.
FIG. 6 is an explanatory diagram of a drum body provided in the main rope exchanging device of the present embodiment.
FIG. 7 is an explanatory diagram of a rope guide provided in the main rope exchanging device of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hoistway 1c Doorway 2 Guide rail 2a Rail bracket 4 Riding car 4a Lower car pulley 5 Counterweight 5a Weight pulley 6 Rope 7 Hoisting machine 7a Hoisting sheave 9, 10 Rope fixing part 11 Wire (car cage holding part)
12 jack support (weight holding part)
14 Mounting stand 15 Drum body 16 Connecting member 17 New rope 18 Rope connecting part 23 Rope guide 24 Rope feeding drum 25 Rope winding drum 26 Frame 28 Caster 29 Base 30 Rotating seat 31 Support base 32 Support member

Claims (4)

Both ends are respectively connected to the rope fixing part at the top of the hoistway, and the middle part is sequentially connected to the weight pulley provided at the counterweight, the car lower pulley provided at the lower part of the car, and the hoisting sheave of the hoist. In an elevator main rope changing device that replaces multiple ropes that are hung,
A car holding unit that holds the car at the top of the hoistway, a weight holding unit that holds the counterweight at the bottom of the hoistway, a rope delivery drum that sends out a new rope for replacement, and the rope. A drum body on which a rope winding drum to be wound is connected on substantially the same axis and is mounted on a movable frame, a mounting table provided on an upper part of the car and to which the drum body is mounted, A main rope changing device for an elevator, comprising: a detachable connecting member connecting the entrance and exit of the hoistway. The main rope changing device for an elevator according to claim 1, wherein a caster is provided on the drum body. The main rope changing device for an elevator according to claim 1, wherein the frame of the drum body includes a base, and a support that is rotatably provided on the base and supports the rope delivery drum and the rope winding drum. A main rope changing device for an elevator, comprising: 2. The main rope changing device for an elevator according to claim 1, wherein a roller is provided on at least one of the mounting base and the connecting member.

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