JP2001287877A - Main rope replacement method and device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main rope replacement method and device allowing the replacement of a main rope dividedly without requiring any special work or frame. SOLUTION: This method and device comprises a rope connector 17 for connecting one end of a new main rope 20 to one end of an existing main rope 4, a pulling means 15 for successively pulling the existing main rope 4 having the new main rope 20 connected thereto from the other end side, and fitting bodies 30a-30f and guide bodies 31a-31c interposed between a sheave 3a and the main ropes 4 and 20 to reduce the friction force generated in the movement of the main ropes 4 and 20. The existing main rope 4 is pulled by the pulling means 15, whereby the new main rope 20 connected to the existing main rope 4 through the rope connector 17 is successively laid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for replacing a main rope of an elevator used when replacing a main rope from an existing one to a new one.

[0002]

2. Description of the Related Art Conventionally, when replacing a main rope from an existing one to a new one, for example, Japanese Patent Laid-Open No. 7-252052
As described in the publication, at least one of the existing main ropes is replaced with a guide device installed in a hoisting machine, and both ends of the existing main rope hung on the guide device are placed in a car. And remove from the counterweight,
Connect the new main rope to one end. Next, after moving the main rope hung on the guide device by the guidance of the guide device, the existing main rope is separated from the new main rope, one end of the new main rope is the car, and the other end is the car. There has been proposed a method of exchanging a main rope of an elevator, which comprises a step of connecting each to a counterweight.

As described in JP-A-2-249885, first, a counterweight is held by a platform at a lower portion of a hoistway, and a car is lifted by a chain block at an upper portion of a hoistway. A rope gripping device is disposed above the counterweight to grip an existing main rope. Then, the end of the existing main rope on the counterweight side is separated from the rope stopper, the new main rope is connected to the end by a drum, and the end on the car side is separated from the rope stopper, and the end is removed. Attach the part to the drum. Thereafter, the hoist is operated at a low speed, the existing main rope is wound around the drum, the new main rope is unwound from the drum, and the new main rope is sequentially wound.
Then, there has been proposed an elevator main rope replacement method including a step of connecting each end of a new main rope to a rope stopper.

[0004]

However, in the above-described conventional method, it is necessary to newly provide an anchor bolt or the like, for example, on a ceiling of a machine room in order to dispose the guide device. Further, in the case of disposing the frame at a place other than the ceiling, it is necessary to install a frame in the machine room, and the work of installing the frame requires labor and the work involved in installing the frame in a relatively narrow machine room. The sexuality and safety declined.

In the above-mentioned conventional method, the main rope is exchanged by operating the hoist. For example, if the main rope is hung with six ropes, the six ropes can be exchanged simultaneously. There are 6 new main ropes and 6 existing main ropes.
There is a problem that a region for arranging books is required, and when this relatively large region cannot be secured, the main rope exchange cannot be performed in a divided manner.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to provide an elevator capable of performing main rope replacement by dividing without requiring special processing or a frame. An object of the present invention is to provide a main rope replacement method and a device thereof.

[0007]

In order to achieve this object, an invention according to claim 1 of the present invention comprises a hoisting machine installed near the top of a hoistway and a car capable of moving up and down in the hoistway. And a counterweight and at least one main rope one of which is connected or wrapped around the car, the other with the counterweight, and the middle of which is wrapped around the sheave of the hoist, In an elevator main rope replacement method used when replacing the main rope from an existing one to a new one, the car and the counterweight are fixed, and then the new main rope is attached to one end of the existing main rope. One end is connected, and thereafter, a rope guide means for reducing a frictional force generated when the main rope is moved is interposed between the sheave and the main rope, and then the new main rope is connected by a retracting means. It is sequentially draw the existing main rope flop is connected from the other end are to pass over the newly main rope.

According to the first aspect of the present invention, the car and the counterweight are first fixed at predetermined positions, and then the car and the counterweight are newly installed at one end of the existing main rope. Connect one end of the main rope. Thereafter, a rope guiding means is provided between the sheave and the main rope to reduce a frictional force generated when the main rope moves,
Next, the existing main rope, to which the new main rope is connected, is sequentially drawn in from the other end by the drawing-in means, and the new main rope is bridged. This eliminates the need for special processing and a frame body as in the related art, and sequentially pulls in the main ropes by the drawing-in means without requiring the operation of the hoisting machine. it can.

According to another aspect of the present invention, there is provided a hoist installed near a top of a hoistway, and a car and a counterweight capable of moving up and down in the hoistway. , One of which is connected or wound around the car and the other is connected to the counterweight, and an intermediate portion of which is provided with at least one main rope wound around sheaves and pulleys of the hoisting machine. In an elevator main rope exchanging device used when exchanging a rope from an existing one to a new one, a rope connecting means for connecting one end of the new main rope to one end of the existing main rope, wherein the new main rope is connected. A pull-in means for sequentially pulling the existing main rope from the other end side, and a rope interposed between the sheave and the main rope for reducing a frictional force generated when the main rope moves. It is a configuration that includes an inner unit.

According to the second aspect of the present invention constructed as described above, first, the car and the counterweight are fixed at predetermined positions, and then a new one is installed at one end of the existing main rope. Connect one end of the main rope. Thereafter, a rope guiding means is provided between the sheave and the main rope to reduce a frictional force generated when the main rope moves,
Next, the existing main rope, to which the new main rope is connected, is sequentially drawn in from the other end by the drawing-in means, and the new main rope is bridged. As described above, the main rope is sequentially pulled in by the pull-in means. At this time, the pull-in means can reduce the weight of the pull-in by the rope guide means. No special processing or frame is required. Further, since the main ropes are sequentially drawn in by the drawing means without requiring the operation of the hoisting machine, the main ropes can be divided and exchanged.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an elevator main rope replacing method and apparatus according to the present invention.

FIG. 1 is a longitudinal sectional view showing an embodiment of an elevator main rope exchanging apparatus according to the present invention, FIG. 2 is a flowchart showing an elevator main rope exchanging method according to the present invention, and FIG.
Is an enlarged view of a main part showing a rope guide means of the main rope exchanging apparatus of FIG. 1, FIG. 4 is an enlarged view of a main part showing a hoist around which the main rope is wound, and FIG. 5 is a rope of the main rope exchanging apparatus of FIG. It is a principal part enlarged view which shows a connection means.

The elevator is generally equipped with a machine beam 19 installed in the machine room 2 above the hoistway 1 as shown in FIG.
A hoisting machine 3 disposed above and a sheave 3a of the hoisting machine 3
, And both sides are suspended in the hoistway 1 to form loops, respectively, and both ends are supported on the floor 2a of the machine room 2 via the rope fasteners 10 and 11, respectively. For example, six existing main ropes 4, a pulley 5 which is engaged with one suspended portion of the existing main ropes 4 provided on the upper part, a car 6 which is lifted in the hoistway 1 via the pulleys 5, A pulley 7 that engages with the other suspended portion of the rope 4 is provided at the upper portion, and a counterweight 8 that is lifted in the hoistway 1 via the pulley 7 and is installed in the machine room 2 and the existing main rope 4 is wound therearound. And a deflector pulley 9.

The main rope exchanging device of this embodiment is installed in a pit 18 below the hoistway 1 at the time of main rope exchanging, and is one of the car 6 and the counterweight 8, for example, FIG. A holding table 12 for holding the counterweight 8, a chain block 13 installed in the machine room 2 and holding the other elevating body, for example, the car 6 in FIG. 1 while being lifted above the hoistway 1, Guide means 14a, 14b for guiding the new main rope 20
A pull-in means 15 installed on the car 6 for sequentially pulling in the existing main ropes 4 to which the new main ropes 20 are connected.
And the existing main ropes 4 are, for example, balanced weight rails 8.
a, a rope connecting means for connecting one end of the new main rope 20 to one end of the existing main rope 4, for example, a rope connecting body 17, and the new main rope 20 are wound around the elevator hall 24. The drum 28, the storage container 21 for storing the existing main rope 4 drawn in by the drawing means 15, and the sheave 3a and the existing main ropes 4d, 4e, 4f, 4g, 4h, 4i as shown in FIG. Rope guide means for reducing frictional force generated when the existing main ropes 4d to 4i move, for example, fitting bodies 30a, 30b, 30c, 30 fitted in respective grooves of the sheave 3a.
d, 30e, and 30f, and guides 31a, 31b, and 31c that are arranged so as to extend between the convex portions of the sheave 3a so that adjacent main ropes 4d to 4i do not interfere with each other. In addition, the above-mentioned retraction means 15 is more preferably a system in which the rope is sent out endlessly than a device in which the drum is rotated by power to wind up the rope, and the present embodiment is the latter.

In this embodiment, as shown in FIG. 2, first, as a step S1, a holding table 12 is set in a pit 18 below the hoistway 1, and the counterweight 8 is held by the holding twelfth. The chain book 13 is installed on the machine beam 19, the chain block 13 is engaged with the car 6, and the newly installed main rope 2 is calculated in advance.
It is held in a state of being wound up by the length of the initial elongation of 0.
Next, in step S2, the retraction means 15 is fixed to a crosshead (not shown) on the car 6, and in step S3, the existing main rope 4 is fixed to, for example, the counterweight rail 16 by the fixed body 16. Thereafter, as step S4, the existing main rope is cut from the fixed position shown in step S3 on the machine room 2 side, and the existing main rope 4 is placed between the pulley 5 on the car 6 and the rope stopper 10. After the cutting, the new main rope 20 is pulled in from the drum 28 installed in the elevator hall 24 via the guide means 14a and 14b, and the new main rope 20 and the existing main rope 4 are connected by the rope connector 17. As shown in FIG. 5, the rope connector 17 is installed so as to wrap around a portion where the ropes 4 and 20 are attached to each other.
When the rope is pulled, the rope connection body 17 formed in a cylindrical net shape contracts, thereby connecting the ropes 4 and 20 with each other.

Next, in step S5, the existing main ropes 4d to 4i are lifted by the sheave 3a as shown in FIG.
As shown in the figure, fitting bodies 30a to 30f are interposed between the sheave 3a and the existing main ropes 4d to 4i, and the existing main ropes 4d
To reduce the frictional force generated at the time of movement of the guide ropes 4a to 4i, and arrange the guides 31a to 31c between the projections of the sheave 3a so that the adjacent existing main ropes 4d to 4i do not interfere at the time of movement. . Then, as step S6, the existing main rope 4 is attached to the pull-in means 15, and step S7 is performed.
The existing main ropes 4 are sequentially drawn into the storage container 21 and the new main ropes 20 are connected to the pulley 7, the deflector pulley 9, and the sheave 3.
a, sequentially passing through the pulley 5 and being bridged. At this time, the existing main rope 4 and then the new main rope 20 sequentially move the sheave 3a at first, but as described above, the sheave 3a
Since the fitting bodies 30a to 30f are interposed between the existing main rope 4 and the new main rope 20, the frictional force generated during the movement is reduced. Thereafter, in step S8, each end of the new main rope 20 is connected to the rope stoppers 10, 1
Connect to 1. This series of steps is carried out using six existing main ropes 4
And the new main rope 20 is sequentially performed. Next, in step S9, the chain block 13 is loosened, and the car 6 is suspended by the newly installed main rope 20.
0 rope tension adjustment
And the rope replacement work is completed.

In this embodiment constructed as described above, the main ropes 4 and 20 are sequentially pulled in by the pull-in means 15, but at this time, the rope guide means, that is, the fitting bodies 30a to 30a are connected.
30f can reduce the weight of the pull-in, so that the pull-in means 15 can be reduced in size and weight.
Therefore, there is no need for special processing and a frame body as in the related art. Further, since the main ropes 4 and 20 are sequentially pulled in by the pull-in means 15 without requiring the operation of the hoisting machine 3,
The main rope can be replaced separately.

FIG. 6 is an enlarged view of a main part showing another embodiment of the rope guide means shown in FIG.

As shown in FIG. 6, the rope guide means of another embodiment is mounted on, for example, a sheave 3a and has another groove having a groove with which the existing main ropes 4d to 4i can be engaged with a relatively small ground contact area. A body 32 is provided.

In another embodiment, the above-described procedure S5
When the rope guide means is interposed between the sheave 3a and the existing main ropes 4d to 4i, the existing main rope 4 is connected to the sheave 3a.
d to 4i are lifted, and another guide body 32 is interposed between the sheave 3a and the existing main ropes 4d to 4i as shown in FIG. 6 to reduce the frictional force generated when the existing main ropes 4d to 4i move.

In another embodiment, the machine room 2 is not installed above the hoistway 1 as shown in FIG.
8 shows an overall view of an elevator installed above the hoistway 1. FIG.

In FIG. 8, the car 6 runs vertically along car-side guide rails 6a and 6b mounted in the hoistway 1. The counterweight 8 also runs vertically along the counterweight-side guide rails 8a, 8b installed in the hoistway 1. The car 6 and the counterweight 8 are supported by the rope 4 and run. The rope 4 has two ends and consists of several parallel ropes. The hoist 3 is mounted on the upper end of one of the guide rails 8a, 8b. The hoist 3 is provided with a sheave 3a. One of both ends of the rope 4 is fixed to the upper end of the guide rail 6a by a rope stopper 10, from which the rope 4 is sent to the sheave 3a of the hoisting machine 3 mounted on the upper end of the guide rail 6b. . From here, the rope 4 is sent through the pulley 7 of the counterweight 8 to the rope stopper 11 fitted to the upper end of the counterweight-side guide rail 8b and fixed. The difference from the case of FIG. 1 in performing the rope replacement of the elevator having such a configuration is that the existing main rope 4 rises to the rope stopper 10 via the pulleys 40a and 40b below the car 6. , Adding a guide means 14c,
The pull-in means 1 of the rope 4 through the guide means 14c
5 is attached. Therefore, even in the elevator having such a structure, the existing main rope 4 can be replaced with the new main rope 20 in the process shown in FIG.

In another embodiment constructed as described above, the main ropes 4, 2
At this time, the pull-in means 15 can be reduced in size and weight because the weight of the pull-in means can be reduced by the rope guide means, that is, the other guide body 32. And no frame is required.

FIG. 7 is an enlarged view of a main part showing another embodiment of the rope connecting means shown in FIG.

As shown in FIG. 7, the rope connecting means of another embodiment is, for example, an existing main rope 4 and a new main rope 2.
Strand 4a formed by unraveling the end of zero
And strand 20a, strand 4b and strand 20
b and crimp members 22a, 22b, 22c for crimping the strands 4c and the strands 20c, respectively.

In another embodiment, the procedure S
4, when one end of the new main rope 20 is connected to one end of the existing main rope 4, the existing main rope 4 and the new main rope 2 are connected.
0, loosen the strand 4a and strand 20
a, the strands 4b and the strands 20b and the strands 4c and the strands 20c are respectively bonded to the crimping members 22a to 22c.
The crimp connection is performed by 22c so that the cross-sectional diameter of the connection portion is smaller than the cross-sectional diameters of the existing main rope 4 and the new main rope 20.

[0027]

Since the present invention is constructed as described above, the main rope is replaced by a small and lightweight pull-in means, so that there is no need for special processing or a frame as in the prior art. Performance and safety can be improved.

Further, the main ropes can be replaced separately, so that the main ropes can be replaced smoothly even in an elevator in which only a relatively small work area can be secured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an elevator main rope exchanging device of the present invention.

FIG. 2 is a flowchart showing an elevator main rope replacement method of the present invention.

FIG. 3 is an enlarged view of a main part showing a rope guiding means of the main rope changing device of FIG. 1;

FIG. 4 is an enlarged view of a main part showing a hoist around which a main rope is wound.

FIG. 5 is an enlarged view of a main part showing a rope connecting means of the main rope changing device of FIG. 1;

6 is an essential part enlarged view showing another embodiment of the rope guiding means shown in FIG. 3;

FIG. 7 is an enlarged view of a main part showing another embodiment of the rope connecting means shown in FIG. 5;

FIG. 8 is a longitudinal sectional view showing another embodiment of the elevator main rope exchanging device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Machine room 3 Hoist 3a Sheave 4 Existing main rope 5, 7 Pulley 6 Car 6a, 6b Car side guide rail 8 Balancing weight 8a, 8b Balancing weight side guide rail 9 Deflector wheel pulley 10, 11 Rope stopper Hardware 12 Holder 13 Chain block 14c Guide means 15 Retraction means 17 Rope connection body (rope connection means) 20 New main rope 21 Storage container 22a, 22b, 22c Crimping member (rope connection means) 28 Drum 30a, 30b, 30c, 30d , 30e, 30f Fitting body (rope guide means) 31a, 31b, 31c Guide body (rope guide means) 32 Other guide bodies (rope guide means) 40a, 40b Car pulley

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koichi Gondo 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building System Co., Ltd. (72) Inventor Kazutake Yokoyama 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan (72) Inventor Masahiro Murase 4-16-29 Nakagawa, Adachi-ku, Tokyo Inside Hitachi Elevator Techno Service Co., Ltd. (72) Daisuke Fukunaga 4-16-29 Nakagawa, Adachi-ku, Tokyo F term in Hitachi Elevator Techno Service Co., Ltd. (reference) 3F304 BA27 3F305 BB02 DA15

Claims (2)

[Claims] 1. A hoisting machine installed near the top of a hoistway,
A car and a counterweight that can be raised and lowered in the hoistway, one of which is connected or wound around the car and the other of which is connected to the counterweight, and an intermediate portion of which is wound around a sheave of the hoisting machine. A main rope replacement method for an elevator used when replacing the main rope from an existing one to a new one, fixing the car and the counterweight, One end of the new main rope is connected to one end of the existing main rope, and thereafter, rope guiding means for reducing a frictional force generated when the main rope is moved is interposed between the sheave and the main rope, and then the pull-in is performed. A main rope of an elevator, wherein the existing main rope to which the new main rope is connected is pulled in from the other end side and the new main rope is bridged by means. Exchange method. 2. A hoist installed near the top of the hoistway,
A car and a counterweight that can be raised and lowered in the hoistway, one of which is connected or wound around the car and the other of which is connected to the counterweight, and an intermediate portion of which is wound around a sheave of the hoisting machine. An elevator main rope exchange device used for exchanging this main rope from an existing one to a new one, wherein one end of the new main rope is connected to one end of the existing main rope. Rope connecting means, and a retraction means for sequentially pulling in the existing main rope to which the new main rope is connected from the other end side,
A main rope changing device for an elevator, comprising: rope guide means interposed between the sheave and the main rope to reduce frictional force generated when the main rope moves.