CN110817651A

CN110817651A - Elevator main rope replacing device and elevator main rope replacing method

Info

Publication number: CN110817651A
Application number: CN201910482727.0A
Authority: CN
Inventors: 高桥才明; 市毛清一; 五味瑞树
Original assignee: Hitachi Building Systems Co Ltd
Current assignee: Hitachi Building Systems Co Ltd
Priority date: 2018-08-09
Filing date: 2019-06-04
Publication date: 2020-02-21
Also published as: JP2020026320A; JP7033513B2

Abstract

The invention provides a main rope replacing device and a main rope replacing method, which can easily perform main rope replacing operation regardless of the lift shaft stroke. A main rope replacement device (14) is provided with: a base (17) arranged in the elevator room (15); a delivery roller (19) and a take-up roller (21) which are arranged on the base in a state of being overlapped in multiple layers and are rotatable around an axis in the vertical direction; and a rope guide (23) provided on the base, wherein when the main rope is replaced, a driving device (12) is provided on the top portion in the hoistway (2), and the relay rollers (13A, 13b) are mounted on the passenger car (4), and then the old rope (3) which is detached is guided by the relay rollers and the driving device, and the driving device is driven in a state where the old rope and the new rope (3A) are connected, thereby simultaneously performing a new rope feeding operation of the feeding drum (19) and an old rope winding operation of the winding drum.

Description

Elevator main rope replacing device and elevator main rope replacing method

Technical Field

The present invention relates to a main rope replacing device and a main rope replacing method for replacing a main rope of an elevator.

Background

In recent years, elevators called machine-room-less elevators, which do not have a machine room at the top of a hoistway, have become the mainstream to save space in installation places. In this machine-roomless elevator, both ends of a main rope are connected to rope fixing portions at the top of a hoistway, and the middle portion of the main rope is wound around a weight pulley provided in a balance weight, a car lower pulley provided below a riding car, and a hoisting sheave of a hoisting machine provided below the hoistway, and the riding car and the balance weight are raised and lowered in the hoistway in a bucket manner by driving the hoisting machine to hoist the main rope.

In an elevator, since there is a risk of breakage of a main rope due to abnormality such as rusting, breakage, or abrasion over a long period of time, regular visual inspection or inspection using a dedicated diagnostic device is performed. When it is found that the above-described abnormality exceeds the predetermined range, the main rope is replaced with a new rope, but in the replacement of the main rope, it is necessary to temporarily fix a car as an elevator and a balance weight in the hoistway.

When the main rope is replaced, the following operations are required: in a state where the passenger car and the balance weight are fixed in the hoistway, the new rope is connected to one end side of the old rope detached from the rope fixing portion, and then the other end side of the old rope is pulled to replace the new and old rope.

Patent document 1 describes a main rope replacement method including: a main rope holding device integrated with a drum, in which a delivery drum, a winding drum and the main rope holding device are integrally configured, is installed between top-level elevators, an old rope is detached from a rope fixing portion in a state where a passenger car and a balance weight are fixed in a hoistway, a new rope pulled out from the delivery drum is guided by a rope guide pulley mounted on the top portion in the hoistway and connected to one end side of the old rope, the other end side of the old rope is guided by another rope guide pulley mounted on the top portion in the hoistway and mounted on a winding drum, and the delivery drum and the winding drum are manually operated to simultaneously deliver and wind the new and old rope.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012 and 56716

Disclosure of Invention

Problems to be solved by the invention

However, in the case of the conventional technique described in patent document 1, since the new and old ropes are guided by the rope guide sheave mounted on the ceiling portion in the hoistway, there is a problem that the rope pull-back distance when connecting the new and old ropes becomes long, and the operability deteriorates. Further, a rope transfer path from the rope guide pulley to the drum-integrated main rope gripping device provided in the elevator hall is close to a peripheral edge portion of an entrance of the elevator, and a door frame or other member requiring high design is present at the entrance.

Further, in the conventional technique described in patent document 1, since the delivery drum and the take-up drum for storing the new and old ropes are disposed in parallel with each other with the rotation shafts thereof being oriented vertically in the horizontal direction, if the shaft stroke of the elevator becomes long and the total length of the new and old ropes to be stored becomes long, the drums need to be added in the lateral width direction and continuously disposed end to end, and there is a problem that the present technique cannot be used for an elevator having a narrow lateral width such as a machine-roomless elevator.

The present invention has been made in view of the above-described circumstances of the prior art, and an object thereof is to provide a main rope replacement device and a main rope replacement method that can easily perform a main rope replacement operation regardless of a hoistway stroke of an elevator.

Means for solving the problems

In order to achieve the above object, a main rope replacing apparatus for an elevator according to a representative aspect of the present invention is an apparatus for replacing a plurality of old ropes, each of which has both ends connected to rope fixing portions at a top portion of a hoistway and an intermediate portion wound around a hoisting sheave of a hoisting machine, with new ropes, the apparatus comprising a base capable of being installed in a boarding room, a delivery drum for the new ropes rotatably installed on the base in a state of being stacked in multiple stages, a winding drum for the old ropes rotatably disposed coaxially with the delivery drum, and a rope guide provided on the base and defining a transfer path for the new ropes and the old ropes, wherein the rope guide is provided with a sorting roller for sorting the new ropes delivered from the delivery drum one by one.

Effects of the invention

According to the present invention, the main rope replacement work can be easily performed regardless of the hoistway stroke of the elevator. Further, problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is a schematic configuration diagram showing a main part of an elevator.

Fig. 2 is a flowchart showing a procedure of a main rope replacement method for an elevator according to an embodiment.

Fig. 3 is an explanatory view showing a main rope replacement operation of the elevator according to the embodiment.

Fig. 4 is an explanatory view showing a main rope replacement operation of the elevator according to the embodiment.

Fig. 5 is a side view showing a main rope replacing apparatus of an elevator according to an embodiment.

Fig. 6 is a plan view of the main rope replacing device.

Fig. 7 is a detailed view of a rope guide provided in the main rope replacement device.

Fig. 8 is an explanatory view of the operation of the rope guide.

In the figure:

1-elevator, 2-hoistway, 3-main rope (old rope), 3A-new rope, 4-riding car, 4 a-car lower sheave, 5-balance weight, 5 a-weight sheave, 6-hoist, 7-top beam, 8-top sheave, 9-hoist sheave, 10-buffer, 11a, 11 b-rope fixing portion, 12-driving device, 13A, 13 b-relay roller, 14-main rope replacing device, 15-elevator room, 16-wheel, 17-base, 18-lower turntable, 19-feeding roller, 20-upper turntable, 21-winding roller, 22-pillar, 23-rope guide, 24-sorting device, 25-adjusting bolt, 26-stabilizing foot, 27-support shaft, 28-rope cover, 29-bolt, 30-guide roller, 31-turntable, 32-sorting roller, 33-box-shaped case, 34-shackle, 35-connecting part.

Detailed Description

Embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a schematic configuration diagram showing a main part of an elevator to which a main rope replacement device according to an embodiment of the present invention is applied.

A machine room-less elevator 1 shown in fig. 1 is an elevator in which a passenger car 4 and a balance weight 5 connected via a main rope 3 are lifted and lowered by a driving force of a hoist 6 in a hoistway 2 installed in a building. A top beam 7 is provided at an upper portion in the hoistway 2, and two top pulleys 8 are mounted on the top beam 7. The hoisting machine 6 is provided at a lower position in the hoistway 2, and has a hoisting sheave 9 that rotates using a motor, not shown, as a drive source. The balance weight 5 is guided in the vertical direction along two guide rails (not shown), and a buffer 10 facing the lower surface of the balance weight 5 is provided at the inner bottom of the hoistway 2.

The main rope 3 passes through a lower car sheave 4a provided at a lower portion of the passenger car 4 from a rope fixing portion 11a provided at the top beam 7, is wound around a hoisting sheave 9 of the hoisting machine 6 via one top sheave 8, passes through a weight sheave 5a provided at an upper portion of the balance weight 5 from the hoisting machine 6 via the other top sheave 8, and has the other end portion thereof connected to a rope fixing portion 11b provided at the top beam 7. Here, the elevator 1 is suspended by a plurality of main ropes 3, of which one main rope 3 is representatively shown in fig. 1.

Next, the procedure of the main rope replacement method according to the embodiment will be described with reference to fig. 3 to 8, based on the flowchart shown in fig. 2. Fig. 3 and 4 are explanatory views showing a main rope replacement operation of the elevator according to the embodiment.

First, as step S1, the balance weight 5 is fixed in contact with the buffer 10, and the riding car 4 is held so as not to move to the vicinity of the top of the hoistway 2 by using a chain block or the like, not shown.

Next, as shown in fig. 3, in step S2, the drive device 12 is suspended from the top beam 7 and installed in the hoistway 2, and the pair of

relay rollers

13a and 13b are attached to the upper surface of the car 4. The driving device 12 has a roller that rotates with a motor as a driving source, and the driving device 12 is connected to a controller, not shown, that is operated by an operator by wire or wirelessly.

Next, in step S3, both ends of the main rope 3 (hereinafter, referred to as an old rope) having the car 4 and the balance weight 5 suspended thereon are detached from the

rope fixing portions

11a and 11b, and the old rope 3 is guided to the rollers of the drive device 12 and the

relay rollers

13a and 13b on the car 4.

Next, as shown in fig. 4, the main rope replacing device 14 according to the embodiment is installed in the boarding room 15 on the top floor as step S4. Here, the structure of the main rope replacing device 14 will be described. Fig. 5 is a side view of the main rope replacing device 14, fig. 6 is a plan view of the main rope replacing device 14, fig. 7 is a detailed view of a rope guide provided in the main rope replacing device 14, and fig. 8 is an explanatory view of the operation of the rope guide.

As shown in fig. 5 to 8, the main rope replacing device 14 according to the embodiment includes: a base 17 provided with a plurality of wheels 16 with locking function; a rotatable feed roller 19 mounted on the base 17 via a lower turntable 18 in a state of being stacked in multiple stages (four stages in the present embodiment); a rotatable take-up drum 21 mounted on the uppermost feed drum 19 via an upper turn table 20; a rope guide 23 provided at an upper end of a stay 22 erected on one end side of the base 17; and a sorting device 24 erected on the base 17 in the vicinity of the feed roller 19.

The base 17 is configured by connecting both end portions of two steel members 17a arranged in parallel to each other in a frame shape by a plate member 17b, and is configured in a frame shape in this way, thereby achieving weight reduction. Since the wheels 16 with a lock function are attached to the four corners of the base 17, the base 17 can be smoothly moved on the floor of the boarding room 15 by the wheels 16 and can also be fixed so as not to move at a predetermined position. Further, the base 17 is attached with a stabilizer leg 26 having an adjusting bolt 25 attached to both end portions thereof, and the base 17 can be stably supported on the floor of the boarding space 15 by adjusting the adjusting bolt 25.

The feed drum 19 and the take-up drum 21 are rotatable about a common support shaft 27, and the feed drum 19 and the take-up drum 21 are stacked with their rotation axes oriented in the vertical direction.

A new rope 3A to be replaced with the old rope 3 is wound around the delivery drum 19, and a plurality of new ropes 3A are wound around the delivery drum 19 at each floor in order to replace all of the old ropes 3 used in the elevator 1 at once. The feed roller 19 at the lowermost stage is placed on the lower turn table 18, and the lower turn table 18 is provided with a rope guard 28 for preventing the new rope 3A wound around the feed roller 19 from going outward in the circumferential direction.

The old rope 3 replaced with the new rope 3A is wound on the winding drum 21, and the delivery drum 19 and the winding drum 21 can rotate independently of each other because the upper turn table 20 is interposed between the winding drum 21 and the delivery drum 19 on the uppermost layer.

The lower turntable 18 is fixed to the steel material 17a of the base 17 by a plurality of bolts 29, and when the main rope changer 14 is carried in/out of the boarding room 15, the unit of the lower turntable 18 including the delivery drum 19 and the take-up drum 21 can be detached from the base 17 by detaching the bolts 29. Similarly, since the above-described stabilizer bar 26 and the sorting device 24 described later are also fixed to the steel material 17a of the base 17 by the bolts 29, the stabilizer bar 26 and the sorting device 24 can be detached from the base 17 at the time of carrying in/out of the main rope replacing device 14.

In the sorting device 24, a plurality of pairs of guide rollers 30 are provided at intervals in the vertical direction so as to correspond to the height positions of the feed rollers 19 arranged in a stacked manner. As described above, the plurality of new ropes 3A are wound around the feed drum 19, and the new ropes 3A pass through the guide rollers 30 corresponding to the respective ropes and reach the rope guide 23 provided on the one end side of the base 17.

The rope guide 23 defines a transfer path for the new rope 3A fed from the feeding drum 19 and the old rope 3 wound by the winding drum 21, and is rotatably erected on the upper end portion of the support column 22 of the base 17 via the turntable 31 (see fig. 8). At this time, the height position H1 of the rope guide 23 can be adjusted by the support column 22 so that the new and

old ropes

3 and 3A defined by the rope guide 23 do not contact a door frame or the like, not shown, provided at the doorway of the elevator 1. Specifically, a plurality of types of support columns 22 having different length dimensions may be prepared, and a support column 22 having an optimal length may be attached to the base 17 according to the specification of the elevator 1, or a telescopic support column 22 having a variable length may be used.

The rope guide 23 is provided with a sorting roller 32 for sorting the new ropes 3A passing through the guide roller 30 from the feeding drum 19 one by one, and it is considered that the sorting roller 32 does not intersect the new ropes 3A fed from the feeding drum 19. The sorting roller 32 is housed inside a box-shaped case 33, and a hook ring 34 for winding and guiding the old ropes 3 is provided on the upper surface of the box-shaped case 33.

Here, when the maximum height of the stacked delivery roller 19 and the winding roller 21, that is, the height from the floor of the boarding space 15 to the winding roller 21 is set to H2, the height H1 of the rope guide 23 is set to be higher than the height H2 of the winding roller 21. This prevents the new ropes 3A from crossing the old ropes 3 wound by the winding drum 21, in addition to the crossing of the new ropes 3A fed from the feeding drum 19.

Returning to the flowchart of fig. 2, at step S4, the main rope replacing device 14 is installed in the boarding pass 15, and then, as shown in fig. 4, the end of the old rope 3 passed through one relay roller 13b and the new rope 3A fed from the feeding drum 19 are connected by the connecting portion 35, and the end of the old rope 3 passed through the other relay roller 13A is attached to the winding drum 21, as shown at step S5.

Next, in step S6, the operator located in the boarding room 15 operates a controller, not shown, to drive the driving device 12, and the old rope 3 is transferred in the arrow a direction of fig. 4 by the driving of the driving device 12, whereby the feeding operation of the new rope 3A from the feeding drum 19 and the winding operation of the old rope 3 to the winding drum 21 are simultaneously performed.

At this time, the new ropes 3A are simultaneously fed out from the feeding drum 19 to reach the rope guide 23, and after being sorted one by the sorting rollers 32 of the rope guide 23, they become transfer paths guided by the relay rollers 13A and 13b provided on the passenger car 4 and the driving device 12 provided at the ceiling portion of the hoistway 2, so that the replacement work of the main ropes used in the elevator 1 can be performed at one time, and the rope pull-back distance when connecting the new and

old ropes

3 and 3A is short, so that the replacement work of the main ropes can be easily performed.

Further, since the rope guide 23 of the main rope replacing device 14 provided in the boarding room 15 is adjusted to a height not to contact with the exterior members such as the door frame, and the new rope 3A and the old rope 3 are guided to the relay rollers 13A and 13b on the car 4 via the rope guide 23, the exterior members can be protected from damage of the ropes without performing any special maintenance work.

Further, as shown in fig. 8, since the rope guide 23 is rotatably provided at the upper end portion of the support column 22, relative positional variation between the car 4 and the main rope replacing device 14 is absorbed by the rotation of the rope guide 23, and the main rope replacing device 14 can be freely provided at any place of the boarding space 15.

Next, as step S7, when the connection portion 35 approaches the winding drum 21, the drive of the drive device 12 is stopped, and the feeding operation of the new rope 3A and the winding operation of the old rope 3 are stopped. Then, the connection portion 35 between the new rope 3A and the old rope 3 is disconnected, the new rope 3A is detached from the delivery drum 19 of the main rope replacing device 14, and both ends of the detached new rope 3A are attached to the

rope fixing portions

11a and 11b provided in the top beam 7 of the hoistway 2.

Finally, in step S8, the fixing of the balance weight 5 to the buffer 10 is released, the chain block or the like holding the car 4 is detached, and the state is restored to the state suspended from the new rope 3A, and then a trial run or the like is performed.

In addition, during the operation before the main rope replacement operation is completed, when a large amount of old ropes 3 are wound on the winding drum 21, the following operations are performed: the old rope 3 is cut near the winding drum 21 while the driving device 12 is driven, the rotation of the winding drum 21 is forcibly stopped, the old rope 3 accumulated in the winding drum 21 is taken out, and then the end of the cut old rope 3 is attached to the winding drum 21 again. At this time, since the feed drum 19 and the take-up drum 21 can be independently rotated, the rotation of the feed drum 19 that feeds out the new rope 3A can be stopped, and the rotation of the take-up drum 21 can be temporarily stopped without stopping the rotation, and the operation of taking out the old rope 3 accumulated in the take-up drum 21 can be easily performed.

As described above, in the main rope replacing device 14 of the present embodiment, the sending drum 19 and the winding drum 21 for storing the new and

old ropes

3 and 3A are disposed in a horizontal state with their rotation axes oriented in the vertical direction, and therefore, even when storing long new and old ropes with a long hoistway stroke of the elevator 1, the

drums

19 and 21 may be disposed in a stacked manner in the height direction end to end, and the driving device 12 for rope transfer is provided in the hoistway 2 separately from the main rope replacing device 14, and the lateral width dimension of the entire device is suppressed, and therefore, the device can be used even in an elevator 1 having a narrow lateral width such as a machine-room-less elevator.

In the main rope replacing device 14 of the present embodiment, the rope guide 23 defining the transfer path of the new and

old ropes

3 and 3A is provided at the upper end portion of the support column 22, and the height position H1 of the rope guide 23 can be adjusted by the support column 22 so that the new and

old ropes

3 and 3A defined by the rope guide 23 do not contact the door frame or the like provided at the doorway of the elevator 1, and therefore, the appearance member can be protected from damage of the ropes without performing any special maintenance work. Further, since the rope guide 23 is rotatably provided at the upper end portion of the support column 22, relative positional variation between the passenger car 4 and the main rope replacement device 14 is absorbed by the rotation of the rope guide 23, and the main rope replacement device 14 can be freely provided at a desired position in the boarding space 15.

In the main rope replacing method according to the present embodiment, the new and

old ropes

3 and 3A stored in the delivery drum 19 and the winding drum 21 of the main rope replacing device 14 installed in the boarding room 15 are guided by the relay rollers 13A and 13b installed in the car 4 in the hoistway 2, and therefore, the rope pull-back distance when connecting the new and

old ropes

3 and 3A is short, and the main rope replacing work can be easily performed.

The above embodiments are illustrative of the present invention, and the scope of the present invention is not limited to these embodiments. Those skilled in the art can implement the present invention in other various ways without departing from the spirit of the present invention.

For example, although the above-described embodiment describes an elevator using a wire rope as the main ropes 3, the present invention can also be applied to an elevator using a flat belt instead of a wire rope.

Claims

1. A main rope replacing device for an elevator, which replaces a plurality of old ropes with new ropes, wherein both ends of the old ropes are connected to rope fixing portions at the top of a hoistway, respectively, and the middle portions of the old ropes are wound around a hoisting sheave of a hoisting machine,

the disclosed device is provided with: a base which can be arranged between the elevator and the elevator; a feeding roller for the new rope rotatably mounted on the base in a state of being stacked in multiple stages; a winding drum for the old rope rotatably disposed coaxially with the feeding drum; and a rope guide provided on the base and defining a transfer path of the new rope and the old rope,

the rope guide is provided with a sorting roller for sorting the new ropes fed from the feed drum one by one.

2. Main rope changing device of an elevator according to claim 1,

the rope guide is provided at a position higher than the maximum height at which the delivery drum and the take-up drum are stacked.

3. Main rope changing device of an elevator according to claim 2,

the rope guide is rotatably provided at an upper end portion of a column erected on the base.

4. Main rope changing device of an elevator according to claim 1,

the base is provided with a sorting device having a plurality of guide rollers, and the new rope wound around the feed drum is guided to the sorting rollers via the corresponding guide rollers of the sorting device.

5. Main rope changing device of an elevator according to claim 1,

the delivery roller and the take-up roller are independently rotatable.

6. Main rope changing device of an elevator according to claim 1,

the base is provided with a plurality of wheels for transferring and an adjusting bolt for preventing toppling.

7. A method of replacing a main rope of an elevator, in which a plurality of old ropes are replaced with new ropes, both ends of the old ropes are connected to rope fixing portions at a top portion of a hoistway, respectively, and an intermediate portion of the old ropes is wound around a weight pulley provided at a balance weight, a car lower pulley provided at a lower portion of a riding car, and a hoisting sheave of a hoisting machine,

comprises the following steps:

a step of installing a driving device on an upper portion of the hoistway and installing a relay roller on an upper portion of the riding car in a state where the balance weight is fixed to a lower portion of the hoistway and the riding car is held on the upper portion of the hoistway;

a step of detaching an end of the old rope from the rope fixing portion and guiding the end to the driving device and the relay roller;

a step of installing the main rope replacing device according to claim 1 in an elevator hall of an elevator;

connecting the ends of the new rope fed from the main rope replacing device and the old rope guided to the relay roller; and

and a step of simultaneously carrying out the feeding of the new rope and the winding of the old rope by the main rope replacing device while driving the driving device.