CN110002322B

CN110002322B - Method and device for correcting inter-rope spacing

Info

Publication number: CN110002322B
Application number: CN201811547675.2A
Authority: CN
Inventors: 本间正葵
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2017-12-18
Filing date: 2018-12-18
Publication date: 2020-12-04
Anticipated expiration: 2038-12-18
Also published as: JP6450445B1; JP2019108199A; CN110002322A

Abstract

The invention relates to an inter-cord space correction device and an inter-cord space correction method. Even if the car is at the position of the uppermost floor, the uneven intervals of the main ropes due to the twisting effect of the main ropes can be corrected, and maintenance equipment such as a rope cleaning jig or a magnetic flaw detector can be easily installed. The distance correction clamp between ropes is provided with a distance correction clamp (9) between ropes and a safety device (23), and the distance correction clamp between ropes is provided with: a pair of correcting rollers (26, 30) which sandwich a plurality of parallel main ropes (14); brackets (27, 28, 29, 31) rotatably supporting the correction rollers, respectively; and a snap member (32) which connects the brackets to each other to keep the state that the main rope is clamped by the correcting roller, when the position of the inter-rope spacing correcting clamp is lowered after the inter-rope spacing correcting clamp is installed on the main rope, the safety device limits the descending limit of the inter-rope spacing correcting clamp so as not to excessively reduce.

Description

Method and device for correcting inter-rope spacing

Technical Field

Embodiments of the present invention relate to a method and an apparatus for correcting an inter-rope distance of a wire rope used for a main rope of an elevator.

Background

In an elevator, a car and a counterweight are connected by a main rope. The main rope is wound on the winch, and the lift car and the counterweight are lifted and lowered in opposite directions by driving the winch. In such an elevator, a wire rope is used as a main rope. A wire rope is a rope in which a plurality of strands (strand) formed by twisting thin steel wires called filaments are twisted around a fiber core at the center.

When the wire rope is used for a long period of time, grease (grease) contained in the wire rope precipitates, and the grease solidifies or dust adheres to the wire rope, which may hinder the operation of the elevator. Therefore, maintenance such as cleaning of the wire rope is required periodically.

Such cleaning work has been performed manually using a scraper (squeegee) or a brush, but in recent years, a rope cleaning jig for automating the cleaning work has been used (for example, patent document 1).

In addition, in an elevator, it is important to appropriately perform maintenance management of a wire rope such as rope replacement. In recent years, a magnetic flaw detector for detecting a broken or worn portion of a wire rope has been developed (patent document 2).

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5976870

Patent document 2: japanese patent No. 5094067

When the maintenance of the main rope is performed using such a rope cleaning jig or magnetic flaw detection device, the cleaning and flaw detection are performed by attaching the rope cleaning jig or magnetic flaw detection device to a load beam for supporting a hoisting machine and moving the car from the uppermost floor to the lowermost floor.

In general, in an elevator, when a car is located at the uppermost floor, an interval between main ropes is not uniform between a main sheave of a hoisting machine and an upper sheave of the car or between the main sheave and an upper rope guide (hit) of the car due to the influence of twisting of the main sheave. In such a state, the rope cleaning jig or the magnetic flaw detector cannot be attached to the main rope.

In such a case, the car is lowered until the main ropes are aligned at regular intervals, and then the rope cleaning jig and the magnetic flaw detector are attached to the main ropes. After that, the car is raised again to the uppermost floor, and cleaning and flaw detection are started. Therefore, an extra step of lowering and raising the car again occurs.

Disclosure of Invention

The present invention has been made in view of the problems of the conventional art, and an object of the present invention is to provide a method and a device for correcting an inter-rope distance, which can correct uneven intervals of ropes due to the influence of twisting of main ropes even when a car is at the position of the uppermost floor, and can easily install maintenance equipment such as a rope cleaning jig or a magnetic flaw detector.

In order to achieve the above object, an inter-rope spacing correction device according to an embodiment of the present invention is an inter-rope spacing correction device for correcting an inter-rope spacing of a main rope of an elevator to be uniform when a rope maintenance facility for automating maintenance of the main rope is installed on a load beam of a hoist, the inter-rope spacing correction device including an inter-rope spacing correction jig and a safety device, the inter-rope spacing correction jig including: a pair of leveling rollers sandwiching a plurality of main ropes arranged in parallel; brackets that rotatably support the correcting rollers, respectively; and a buckle member that couples the brackets to each other to maintain a state in which the correction roller sandwiches the main rope; when the position of the inter-cord spacing correction jig is lowered after the inter-cord spacing correction jig is attached to the main cord, the safety device restricts a lowering limit of the inter-cord spacing correction jig so as not to excessively lower.

In addition, an inter-rope spacing correction method according to an embodiment of the present invention is a method for correcting an inter-rope spacing of a main rope of an elevator to be uniform when a rope maintenance device that automates maintenance of the main rope is installed on a load beam of a hoist, the method using an inter-rope spacing correction jig including: a pair of leveling rollers sandwiching a plurality of main ropes arranged in parallel; brackets that rotatably support the correcting rollers, respectively; and a locking member for connecting the brackets to each other to maintain a state in which the main rope is clamped by the correcting rollers, wherein when the car is at the uppermost floor, the inter-rope spacing correcting jig is installed at a position immediately downstream of a main sheave of the hoist to the main rope, the inter-rope spacing correcting jig is lowered by a predetermined distance, and the rope maintenance equipment is installed to the main rope in a state in which the inter-rope spacing is corrected to be uniform by the inter-rope spacing correcting jig.

Drawings

Fig. 1 is a diagram showing an outline of an elevator to which the method for correcting the inter-rope spacing according to the present embodiment is applied.

Fig. 2 is a perspective view showing the string maintenance device in a state where the inter-string space correction jig is connected to the string cleaning jig.

Fig. 3 is a perspective view showing the string maintenance device in a state where the inter-string distance correction jig is connected to the magnetic flaw detector.

Fig. 4 is a perspective view showing the inter-cord spacing correction jig alone.

Fig. 5 is a view showing the mounting position of the inter-cord gap correcting jig to the main cord.

Fig. 6 is a perspective view showing a state before the main string is sandwiched by the inter-string pitch correction jig.

Fig. 7 is a top view of the interspinous process space correcting clip of fig. 6.

Fig. 8 is a perspective view showing a state in which the main string is sandwiched by the inter-string pitch correction jig.

Fig. 9 is a top view of the interspinous process space correcting clip of fig. 8.

Fig. 10 is a view showing a process of lowering the inter-cord space correction jig attached to the main cord to the load beam.

Fig. 11 is a view showing a process of mounting the string cleaning jig to the load beam after lowering the inter-string spacing correction jig below the load beam.

Fig. 12 is a diagram showing a state in which the inter-cord gap correction jig is excessively lowered below the load beam and the safety device is operated.

Fig. 13 is a perspective view showing a state in which the inter-cord gap correcting jig and the cord cleaning jig are integrally attached to the main cord.

Fig. 14 is a view showing a state in which the inter-cord gap correcting jig and the cord cleaning jig are mounted.

Fig. 15 is a diagram schematically showing the twist of the main rope connected to the sheave on the car.

Fig. 16 is a perspective view showing a state of the main rope positioned below the load beam when the rope cleaning jig and the inter-rope gap correcting jig are attached to the main rope in the case of twisting the main rope in fig. 15.

Fig. 17 is a view schematically showing the twist of the main rope connected to the head plate on the car.

Fig. 18 is a perspective view showing a state of the main rope positioned below the load beam when the rope cleaning jig and the inter-rope gap correcting jig are attached to the main rope in the case of twisting the main rope in fig. 17.

Detailed Description

Hereinafter, an embodiment of the method and device for correcting an inter-cord distance according to the present invention will be described with reference to the drawings.

Fig. 1 is a diagram showing an outline of an elevator to which the method for correcting the inter-rope spacing according to the present embodiment is applied. In fig. 1, reference numeral 10 denotes a car, and reference numeral 11 denotes a hoist. The hoist 11 is disposed above the bearing beam 18 in the machine room. A main rope 14 is wound around the main sheave 12 of the hoist 11. One end of the main rope 14 is connected to the car 10 via a car upper sheave or a car upper head plate, and the other end is connected to the counterweight 17. A compensation rope 15(compensation rope) is connected to the lower side of the car 10 and the counterweight 17 to compensate the weight of the rope, and the compensation rope 15 is wound around a compensation sheave 16(compensation rope).

In fig. 1, reference numeral 20 denotes a rope maintenance device in which a rope cleaning jig for removing excess grease or dust from a main rope, a magnetic flaw detector for detecting breakage or abrasion of a wire of a strand, and an inter-rope distance correction jig are combined. The rope maintenance device 20 is mounted to the lower surface of the load beam 18. When cleaning or flaw detection of the main ropes 14 is performed, the car 10 is lowered from the position of the uppermost floor to the position of the lowermost floor. Reference numeral 22 denotes a control device of the elevator, and reference numeral 23 denotes a safety device. This will be left to the following.

Next, a rope cleaning jig, a magnetic flaw detector, and an inter-rope pitch correction jig will be described with reference to fig. 2 to 4.

Fig. 2 is a perspective view showing the string maintenance device 20 in a state where the inter-string space correction jig 9 is connected to the string cleaning jig 7. Fig. 3 is a perspective view showing the string maintenance device 20 in a state where the inter-string gap correction jig 9 is connected to the magnetic flaw detector 8. Fig. 4 is a perspective view showing the inter-cord spacing correction jig 9 alone.

First, the rope cleaning jig 7 includes: a plurality of cylindrical grease removing members 22; and

holding plates

21a, 21b and

holding plates

24a, 24b, which are connected in two upper and lower layers by a connecting member 25 and receive the grease removing member 22. In this embodiment, half of the grease removing members 22 are arranged at a constant pitch on the entire

upper holding plates

21a and 21b, and the remaining half of the grease removing members 22 are arranged at the same pitch on the

lower holding plates

24a and 24 b. Below the upper layer grease removing member 22, the lower

layer holding plates

24a, 24b are formed with rope passing holes, and below the upper layer rope passing holes, the lower layer grease removing member 22 is disposed. The interval corresponds to the inter-cord distance of the main cord 14 as the entire arrangement of the grease removing members 22 of the upper and lower layers.

The grease removing member 22 is molded from an elastic material such as urethane resin. A cutout 27 is formed in the grease removing member 22 in the axial direction, and the grease removing member 22 can be rotatably fitted to the main rope 14 by opening a portion of the cutout 27. The inner diameter of the grease removing member 22 is substantially the same as the diameter of the main rope 14. When the main rope 14 passes through the grease removing member 22, grease adhering to the main rope 14 is stripped off.

Below the

lower holding plates

24a and 24b, the following inter-cord space correction jig is connected.

As shown in fig. 4, the inter-cord spacing correction jig 9 has two

correction rollers

26, 30. The leveling

rollers

26 and 30 are provided with

rotation shafts

26A and 30A coaxially. Both ends of one rotating shaft 26A are fastened to

brackets

27, 28, and both ends of the other rotating shaft 30A are fastened to

brackets

29, 31.

A plurality of grooves (grooves) 26a and 30a are formed around the outer peripheries of the leveling

rollers

26 and 30 at a predetermined pitch (corresponding to the inter-cord pitch of the main cords 14). The main ropes 14 are fitted into the

grooves

26a, 30a, and the main ropes 14 having a disturbed pitch are sandwiched at once by the parallel correcting

rollers

26, 30, thereby correcting the pitch between the main ropes 14 to be constant. The

brackets

27, 28 and the

brackets

29, 31 are held so as not to be separated by the engaging member 32, and thus the main rope 14 is held between the

parallel leveling rollers

26, 30.

Such an inter-cord gap correction jig can also be combined with the magnetic flaw detector 8 shown in fig. 3.

In fig. 3, reference numeral 40 denotes a magnetic flaw detection unit that detects flaws while passing one main rope 14 therethrough. The plurality of magnetic flaw detection units 40 are mounted on the plate 41 so as to be aligned in the axial direction of the leveling

rollers

26 and 30 so as to correspond to the intervals between the strands. Each magnetic flaw detection unit 40 is formed with a groove 42 through which the main rope 14 is inserted. The

brackets

27, 28 and the

brackets

29, 31 of the inter-cord gap correction jig are fastened to the lower surface of the plate 41 by bolts and nuts.

Next, the method for correcting the inter-cord spacing according to the present embodiment will be described in detail below, taking as an example a case where the method is applied to cleaning of the main cord 14, using the cord maintenance device 20 shown in fig. 2 and including the combination of the cord cleaning jig 7 and the inter-cord spacing correction jig 9.

In fig. 1, the rope maintenance device 20 is mounted to the lower surface of the load beam 18. This is to prevent the rope maintenance device 20 from being caught in the main sheave 12 of the hoist 11 by any chance, and to ensure safety without any problem. In the cleaning of the main ropes 14, the car 10 descends from the uppermost floor to the lowermost floor, and therefore the car 10 stops at the uppermost floor at the initial position.

This explains that the main ropes 14 are twisted when the car 10 is at the uppermost floor, and as a result, the inter-rope spacing of the main ropes 14 becomes uneven under the load beam 18.

Fig. 15 is a diagram schematically showing the twist of the main rope 14. When the car 10 is provided with the car sheave 60, the main ropes 14 are twisted due to the difference in the rotation direction between the sheave 12 and the car sheave 60.

Fig. 16 shows a state of the main ropes 14 positioned below the load beam 18 by virtual lines when the rope cleaning jig 7 and the inter-rope distance correcting jig 9 are attached to the main ropes 14. Since the intervals between the main ropes 14 and the grease removing member 22 and the intervals between the grooves 26a of the leveling rollers 26 are not uniform, the rope cleaning jig 7 and the inter-rope gap leveling jig 9 cannot be directly attached to the main ropes 14.

Fig. 17 is a diagram schematically showing the twist of the main ropes 14 when connected to the car upper rope head plate 62 of the car 10. At this time, as shown in fig. 18, when the rope cleaning jig 7 and the inter-rope gap correcting jig 9 are to be attached to the main rope 14, the main rope 14 is arranged in a zigzag manner under the load beam 18, and the rope cleaning jig 7 and the inter-rope gap correcting jig 9 cannot be attached to the main rope 14.

Therefore, the following procedure is used to correct the disorder of the pitch due to the twisting of the main ropes 14 using the inter-rope pitch correction jig 9.

Fig. 5 is a view showing the mounting position of the inter-cord gap correction jig 9 to the main cord 14. Reference numeral 100 denotes a floor of the machine room.

The inter-rope spacing correction jig 9 is attached to the main rope 14 at a position higher than the upper surface of the bearing beam 18, that is, at a position immediately downstream of the main sheave 12. At this position, since the main rope 14 is just wound out from the main sheave 12, there is almost no twisting effect, and the inter-rope pitches of the main rope 14 are uniform and uniform.

Therefore, as shown in fig. 6 and 7, the main rope 14 is sandwiched by the leveling

rollers

26 and 30, and as shown in fig. 8, the

brackets

27 and 29 and the

brackets

28 and 31 are coupled by the engaging member 32. Thus, as shown in fig. 9, the main string 14 is sandwiched in a state of being fitted in the

grooves

26a, 30a of the leveling

rollers

26, 30.

Then, in fig. 5, the safety device 23 is connected to the inter-cord gap correcting jig 9 by a connecting cord member 44 having a certain length such as a chain or a wire.

Next, fig. 10 shows a process of lowering the inter-cord spacing correction jig 9 attached to the main cord 14 below the load beam 18. The position of the inter-cord spacing-correcting jig 9 is lowered because the correct mounting position is located on the lower surface of the load beam 18.

Note that, if the inter-cord gap correction jig 9 is lowered excessively, it may hit the floor 100 of the machine room.

In the present embodiment, as a countermeasure, the safety device 23 is connected to the inter-rope gap correcting jig 9 by the connecting rope member 44 for limiting the descent limit. When the inter-rope gap correcting jig 9 is lowered to the lowering limit position, the connecting rope member 44 is disengaged, the safety device 23 is operated, a signal is sent to the control device 22, and the main sheave 12 is stopped, so that a violent collision against the floor 100 of the machine room can be prevented (see fig. 12). The connecting cable member 44 has a fixed length corresponding to the descent limit, but the length may be adjusted.

Fig. 11 shows a process of mounting the string cleaning jig 7 on the lower surface of the load beam 18 after lowering the inter-string spacing correction jig 9. At this time, the uneven pitches of the main ropes 14 due to twisting are corrected by the inter-rope pitch correcting jig 9, and the pitches are uniform and uniform at the positions where the rope cleaning jigs 7 are attached, so that the rope cleaning jigs 7 can be easily attached to the lower surface of the load beam 18.

As described above, in the present embodiment, since the inter-cord gap correcting jig 9 is attached to the main cord 14 on the girder 18, the inter-cord gap correcting jig 9 is lowered below the girder 18, and the cord cleaning jig 7 is attached, the inter-cord gap correcting jig 9 can be attached without being affected by the twist of the main cord 14, and the cord cleaning jig 7 can be attached in a state where the inter-cord gap is corrected to be uniform by the inter-cord gap correcting jig 9. Further, the inter-cord distance correction jig 9 is lowered by only a small distance, and the work efficiency is not affected.

Next, fig. 13 is a perspective view showing a state in which the inter-cord gap correction jig 9 is coupled to the cord cleaning jig 7. Fig. 14 shows the arrangement of the inter-cord space correction jig 9 on the lower surface of the load beam 18 with respect to the cord cleaning jig 7.

In this case, after the inter-cord spacing correction jig 9 is attached to the main cord 14 in fig. 11, it is lifted by hand and moved, and the

brackets

27, 28, 29, and 31 are fastened to the holding

plates

24a and 24b on the lower layer of the cord cleaning jig 7 by bolts and nuts. As shown in fig. 14, the preparation for cleaning the string is completed by integrally providing the string cleaning jig 7 and the inter-string space correcting jig 9 on the lower portion of the bearing beam 18.

When the car 10 is lowered, the main rope 14 follows the car 10 and passes through the grease removing member 22, thereby automatically cleaning the main rope 14.

The above is an example in which the string cleaning jig 7 and the inter-string distance correcting jig are combined, and the mounting procedure when the magnetic flaw detector 8 shown in fig. 3 and the inter-string distance correcting jig 9 are combined is also the same.

The method and apparatus for correcting an inter-cord distance according to the present invention have been described above with reference to preferred embodiments, but these embodiments are given as examples and are not intended to limit the scope of the present invention. It is to be understood that the novel devices, methods and systems described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made therein without departing from the spirit of the invention. The scope of the claims and their equivalents cover the embodiments or modifications within the scope of the gist of the invention.

Claims

1. An inter-rope spacing correction device for correcting an inter-rope spacing of a main rope of an elevator to be uniform when a rope maintenance apparatus for automating maintenance of the main rope is installed to a load beam of a hoist,

the inter-cord space correction device is provided with an inter-cord space correction jig and a safety device,

this anchor clamps are corrected to interval between rope has: a pair of leveling rollers sandwiching a plurality of main ropes arranged in parallel; brackets that rotatably support the correcting rollers, respectively; and a buckle member that couples the brackets to each other to maintain a state in which the correction roller sandwiches the main rope;

when the position of the inter-cord spacing correction jig is lowered after the inter-cord spacing correction jig is attached to the main cord, the safety device restricts a lowering limit of the inter-cord spacing correction jig so as not to excessively lower.

2. The interrope spacing correction device of claim 1,

the safety device includes a connecting cable member that is set to a predetermined length for limiting the descending limit, and that connects the inter-rope gap correcting jig to the safety device,

the hoist is stopped when the hitch member is disengaged from the safety device.

3. The interrope spacing correction device of claim 1,

the rope maintenance device is configured by a rope cleaning jig in which a plurality of cylindrical grease removing members through which the main ropes pass are arranged in correspondence with the inter-rope pitch.

4. The interrope spacing correction device of claim 1,

the rope maintenance equipment is constituted by a magnetic flaw detector in which magnetic flaw detection units for performing magnetic flaw detection on the main rope passed through are arranged in correspondence with the inter-rope pitch.

5. An inter-rope spacing correction method for correcting an inter-rope spacing of a main rope of an elevator to be uniform when a rope maintenance device for automating maintenance of the main rope is installed on a load beam of a hoist,

use the interval between the rope to correct anchor clamps, this interval between the rope corrects anchor clamps and has: a pair of leveling rollers sandwiching a plurality of main ropes arranged in parallel; brackets that rotatably support the correcting rollers, respectively; and a buckle member connecting the brackets to each other to maintain a state in which the main rope is nipped by the leveling rollers,

when the cage is at the uppermost floor, the inter-rope spacing correction clamp is arranged on the main rope at the position immediately downstream of the main rope wheel of the winch,

and lowering the inter-cord space correction jig by a predetermined distance, and attaching the cord maintenance device to the main cord in a state where the inter-cord space is corrected to be uniform by the inter-cord space correction jig.

6. The method for correcting an inter-cord spacing according to claim 5,

the inter-cord spacing correction jig is attached to the main cord at a position above the upper surface of the load beam, and then the inter-cord spacing correction jig is lowered by a predetermined distance from the lower surface of the load beam to the floor surface of the machine room.

7. The method for correcting an inter-cord spacing according to claim 5,

a safety device is used to limit the lowering limit of the interbrand spacing correction jig so that it does not excessively lower.