JPH10338437A - Method for replacing main rope of elevator, main rope housing device used in the method and rope fixing device for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform main rope replacing work even in a limited work place, by shortening the suspending time of elevator service while shortening working time of main rope replacing work. SOLUTION: An allowance part 6b is provided on the lowermost floor, a new main rope 6 is fixed to a car 7, the new main rope is extended to the total length of a hoistway, the car and a counterweight 8 are fixed, an old main rope 6 is fixed in the position of the height of the car 7 in the hoistway and then cut just above it. A cage side part of the cut old main rope 6 is removed to a machine room 2, and the allowance part of the new main rope 6a is connected to the car 7 through a hoist 3. The old main rope 6 is cut and separated from the counterweight 8, and the lower end of the new main rope 6a is connected to the balance weight 8. The old main rope 6 fixed to the hoistway is moved to the car 7, and the old main rope 6 is recovered to the lowermost floor while lowering the car 7. Therefore, main rope changing work is facilitated, the work time is shortened, and work can be performed by using only the lower end of the hoisway even in a limited work place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of exchanging a main rope of an elevator, and a main rope storage device and a car rope fixing device used for the method.
The present invention relates to an elevator main rope replacement method for replacing an old main rope of a 1-roping elevator with a new main rope, and a main rope storage device and a car rope fixing device used therefor.

[0002]

2. Description of the Related Art In recent years, the number of high-rise buildings such as office buildings and hotels has increased, and elevators have been installed in special places such as chimneys of thermal power plants. In such a high structure, even in an elevator installed as an important vertical transportation system, it is necessary to replace the main cable, but if the elevator is stopped for a long time due to replacement of the main cable, etc. This is not a good thing because it is inconvenient for people.

[0003] In an elevator installed in the above-mentioned place, usually, 6 to 10 main ropes are wound around a sheave of a hoist. Also, both ends of each main rope are respectively connected to steel cages by alloy processing, and the tips of the cages are fixed to the upper beams of the car and the upper portions of the counterweights, respectively.

FIG. 9 is a cross-sectional view of a conventional elevator similar to that shown in, for example, JP-A-63-282081 and JP-A-63-282022, showing a state where a main rope is being replaced. In the figure, 1 is a hoistway, 2 is a machine room provided above the hoistway 1, 3 is a hoisting machine installed in the machine room 2, 4 is a deflecting wheel provided in the machine room 2,
5 is a control panel installed in the machine room 2 as well.

[0005] Reference numeral 6 denotes a plurality of (in this example, six) old main ropes wound around the sheave and the deflector wheel 4 of the hoisting machine 3, and 7 is provided in the hoistway 1. A car suspended at one end, 8 is provided in the hoistway 1, and a counterweight suspended at the other end of the old main rope 6, 9 is fixed on the upper beam of the car 7 and above the counterweight 4. Is a cage that has been
Each end of the old main rope 6 is held.

Reference numeral 10 denotes a winch pulley mounted on the ceiling of the hoistway 1, reference numeral 11 denotes a wire winch installed on the uppermost floor, and reference numeral 12 denotes a wire drawn from the wire winch 11. Is connected to the middle of the old main rope 6 via a winch pulley 10 via a rope suspending jig 13. Reference numerals 14 and 15 denote slinging wires and chain blocks for suspending the car 7 from the ceiling of the hoistway 1.

Reference numeral 16 denotes a main rope supplying device installed on the lowest floor, and a new main rope 6a is wound around the main rope supplying device 16. 17 is a pit of hoistway 1 (bottom of hoistway)
Reference numeral 1a denotes a shock absorber, 18 is a weight receiving beam provided in the pit 1a and supports the counterweight 8, and 19 is a work ladder suspended from the pit 1a to the upper part of the counterweight 8.

Next, a conventional main cable exchanging method will be described. First, the car 7 is stopped on the top floor, enters the pit 1a, and measures the gap size between the lower part of the counterweight 8 and the shock absorber on the weight side. Next, the car 7 is signaled from the pit 1a, and the car 7 is lowered until the weight receiving beam 18 enters below the counterweight 8, and the counterweight 8 is raised. And
If it becomes a gap for the weight receiving beam 18 to enter,
Is placed under the counterweight 8 and the car 7 is raised to place the counterweight 8 on the weight receiving beam 18.

On the other hand, on the car 7, the slinging wire 14 and the chain block 15 are attached, and the upper beam of the car 7 is lifted by the chain block 15. Next, counterweight 8
The old main rope 6 on the side is fixed to a rope fixing jig 21 attached to a hoistway wall at a position substantially equal to the upper end of the car 7,
At the intermediate cutting point 28 just above, all six old main ropes 6 are cut. Next, the cage 1 fixed to the upper beam of the car 7 side
Only one old main rope 6 is cut off at the upper end cutting point 27 immediately above 3, and the cut old main rope 6 is taken up and removed in the machine room 2. Such an operation is repeated for all the old main ropes 6, and the upper portions of the six old main ropes 6 are removed. Then, the cage 13 on the car 7 side is removed from the upper beam of the car 7.

Next, the worker climbs the work ladder 19,
At the lower end cutting point 29 immediately above the cage 9 on the side of the counterweight 8, the old main rope 6 is completely cut in six portions, and the cage 13 is removed from the counterweight 8. Then, the rope hanging jig 13 is placed on the basket 7.
Of the old main rope 6 which is suspended from the rope fixing jig 21
The book is fixed at a position below the rope fixing jig 21, and the same old main rope 6 as the old main rope 6 fixed to the rope hanging jig 13 is released from the rope fixing jig 21. Then, the wire winch 11 is driven to lower the old main rope 6, and the old main rope 6 is removed at the landing on the lowest floor 25. Such an operation is repeated for the number of the old main ropes 6, and the remaining part of all the old main ropes 6 is removed.

After the removal of the old main rope 6, the new main rope 6a wound around the main rope supply device 16 is attached to the winch wire 12 and the rope hanging jig 13 with a margin, and the wire winch 11 is attached. Drive and pull up the new main rope 6a. When the upper end of the new main rope 6a is located at substantially the same height position as the upper end of the car 7, the wire winch 11 is stopped, the upper end of the new main rope 6a is removed from the winch wire 12, and the hemp is lowered from the machine room 2. The upper end of the new main rope 6a is connected to the rope 23. Then, the wire winch 11 is operated to further pull up the new main rope 6a, and at the same time, the hemp rope 23 dropped from the machine room 2 is pulled up to the machine room 2, and the upper end of the new main rope 6a is pulled up to the machine room 2. At the same time, the new main rope 6a is wound. Rope hanging jig 13
When the car comes to the same height position as the upper end of the car 7, the wire winch 11 is stopped, the new main rope 6a is wound around the sheave and the deflector wheel 22 of the hoisting machine 3, and the terminal is alloyed and held. Table 13
, The retainer 13 is fixed to the upper beam of the car 7. After the new main rope 6a is fixed to the car 7, the new main rope 6a is cut at a specified size above the counterweight 8, and the terminal is processed and fixed in the same manner as the car 7 side. This operation is repeated for the number of the new main ropes 6a, and the operation of attaching the new main ropes 6a is completed.

[0012]

In the conventional method for exchanging main ropes of an elevator as described above, the work of removing and attaching the old main ropes 6 composed of a plurality of ropes is performed one by one. There was a problem that the question was long and the question when the elevator was suspended was also long. In addition, in an existing building, the installation location of the wire winch 11 is often limited, and there has been a problem that it may be difficult to secure the installation location. For example, a chimney, a suspension bridge support, or the like often lacks an intermediate floor or a top floor required by the conventional rope replacement method, and thus may not be applicable. In addition, recently, the top floor of a high-rise building, hotel, or the like has a carpet spread over a restaurant or an observation floor, so that the floor cannot be used for replacement work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of exchanging a main rope of an elevator which can easily perform an exchanging operation in a short time. It is another object of the present invention to obtain a main rope storage device and a car rope fixing device used in the main rope replacement method.

[0014]

In order to achieve the above object, according to the method for exchanging a main rope of an elevator according to the present invention, a car is stopped at a lower end of a hoistway and a new main rope is moved to a lower end of a hoistway. Place one end of the new main rope near the upper end of the hoistway between the fixed part and the tip with the one end fixed to the above-mentioned car with the car rope fixing device. Form a sufficient margin that can be connected to the car through the machine, hold this extra part by the main rope storage device provided on the car, raise the car with the new main rope to the upper end of the hoistway, At the same time, lower the counterweight to the lower end of the hoistway, hold the car and the counterweight at their respective positions, hold and fix the old main rope at the upper end of the hoistway, and cut the old main rope above the fixed position. Together with the car and remove it, leaving Connecting the part to the car through the hoist, connecting one end of the remaining old main rope fixed to the car, releasing from fixing at the upper end of the hoistway, separating the other end from the counterweight, The other end of the new main rope is connected to the counterweight, and the old main rope connected to the car is recovered from the lower end at the lower end of the hoistway while lowering the car.

Further, the step of connecting the spare portion of the new main rope to the car through the hoist includes connecting the spare portion of the new main rope to the car side of the old main rope, and connecting the car side of the old main rope to the machine. A step of pulling an extra portion into the machine room by pulling it up into the chamber may be included. Alternatively, pull up the old main rope into the machine room, extend a rope other than the old main rope from the machine room, connect it to the spare part of the new main rope, and pull up the rope into the machine room so that the extra part is in the machine room. May be pulled up.
Further, the main rope can be extended and wound in accordance with the elevation of the car on the lowest floor.

Further, according to the present invention, the main rope storage device has an outer peripheral wall, an inner peripheral wall, and a bottom wall which form an annular main rope storage space therebetween, and the inner peripheral walls fit together when stacked. It has been like that.

Further, according to the present invention, the car rope fixing device is attached to the car, the upper rope fixing jig for fixing and supporting the new main rope, and the connecting device connected at one end to the upper rope fixing jig. And a lower rope fixing jig connected to the other end of the connecting tool and fixedly supporting the main rope, wherein the upper rope fixing jig has a complementary relationship with the surface profile of the new main rope, and A rope groove having an inner peripheral surface that makes surface contact is provided. The connecting device may be provided with a curing cloth for main rope protection.

In the present invention, the new main rope is fixed to the car at the lower end of the hoistway, and the new main rope is extended over the entire length of the hoistway by raising the car. Since the old main rope is withdrawn from the lower end of the hoistway by connecting the old main rope and lowering the car, the old main rope can be replaced by the work of only the lower end of the hoistway.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a method of replacing a main rope of an elevator according to an embodiment of the present invention, FIG. 2 is a schematic explanatory view of a construction procedure of the method of replacing a main rope, and FIGS. FIG. 9 is a configuration diagram and an enlarged view showing a tool, and FIG.
The same or corresponding parts are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, reference numeral 32 denotes a cage rope fixing jig suspended from the upper beam of the car 7, reference numeral 31 denotes a rope storage device that is placed on the ceiling of the car 7 and holds the spare portion 6b of the new main rope 6a.
36 is a main rope feeder installed on the lowermost floor 25, and there are a plurality of identical ropes according to the number of the main ropes. I have. The spare portion 6b of the new main rope is a main rope portion between a portion fixed by the car rope fixing jig 32 and the tip of the new main rope 6a, and is provided when the car is positioned near the upper end of the hoistway. Main rope 6a
Is of sufficient length that the tip of the can be connected to the car through the machine room hoist.

FIGS. 3A and 3B are structural views showing the rope fixing jig 21 of FIG. 1. As shown in these figures, the rope fixing jig 21 An attachment metal 51 attached to the guide rail 35 on the counterweight 8 side fixed to the hoistway wall by a fastener 52, an attachment metal 57 attached to the attachment metal 51 by a screw member 56, and a fastener 61 to the attachment metal 57. Fixed mouth plate 60
And a fastener 61 and a clip 6 on the rope fixing plate 60.
2, a clip 62 fixed by a washer 63, a spring seat 64, and a nut 65 for firmly holding the old main rope 6 therebetween.

FIG. 4 is a structural view showing the car rope fixing jig 32 of FIG. As shown in the figure, the car rope fixing device, that is, the car rope fixing jig 32 is suspended from the upper beam of the car 7 via a wire 71 and a wire 72 with hooks at both ends. The car rope fixing device 32 includes an upper rope fixing jig 73 attached to the car 7 to fix and support the new main rope 6a.
A flexible connector 74 connected at one end to the upper rope fixing jig 73, and a lower rope fixing jig 75 connected to the other end of the connector 74 and fixedly supporting the old main rope 6. ing. The connecting tool 74 is a wire 91 with hooks at both ends to connect the upper and lower rope fixing jigs 73 and 75, and the cotton curtain 92 protects the new main rope 6 a from being damaged at the corner of the ceiling end of the car 7. I do. The upper and lower rope fixing jigs 73 and 75 can be connected to and disconnected from each other by a connecting tool 74.

FIGS. 5A and 5B are a perspective view and an enlarged exploded perspective view showing an upper rope fixing jig 73 for holding the new main rope 6a of the car rope fixing jig 32, respectively. . As shown in these figures, the upper rope fixing jig 73 is provided with a U-shaped hanging jig 80a on a hook 72a (FIG. 4) of a wire 72 with a hook at both ends connected to the upper beam of the car 7.
80b, a plate-shaped mounting metal 76 mounted via special bolts 81 and nuts 82, a rope fixing plate 90 fixed to the mounting metal 76 by fasteners 83, washers 84, spring seats 85, and nuts 86; A fastener 83 extends through the rope fixing plate 90, and includes a washer 87, a spring seat 88 and a clip 91 which is detachably fixed by a nut 89. In the opposing surfaces of the rope fixing plate 90 and the clip 91, the rope grooves 9 each having an inner peripheral surface that is substantially complementary to the surface outer shape of the main rope 6a and is in surface contact with the new main rope 6a.
When the main ropes 6a are fixed one by one in the rope grooves 90a and 91a, the new main ropes 6a are securely held without being damaged. U-shaped hanging members 80c and 80d are also attached to the mounting metal 76 by special bolts 81 and nuts 82, and hooks 95a and 9
5b (FIG. 6).

FIG. 6A is a perspective view showing a connector 74 of the car rope fixing jig 32, FIG. 6B is a sectional view taken along line AA 'of FIG. 6A, and FIG. ) Is a sectional view taken along line BB ′. As shown in the figure, the connecting tool 74 is a square cloth bag 92.
, A cloth bag 92 is passed through the bag-shaped portion, hooks 95a at both ends,
95b, 95c, and 95d. The hooks 95a and 95b are respectively connected to the U-shaped hanging members 80c and 80d of the upper rope fixing jig 73 and hung below the upper rope fixing jig 73, and are located at the corners of the ceiling and the wall of the car 7. The lower rope fixing jig 73 is connected to the hooks 95c and 95d. Square cloth bag 9
2 wraps the wire portion of the wire 94 with hooks at both ends,
A square cloth bag containing a cushion such as a sponge 93 or the like protects the car 7 from being damaged by a new main rope 6a being passed therethrough to directly touch the sharp corner of the ceiling of the car 7. Since the connecting member 74 is mainly composed of the wire 94, it is flexible, can be adapted to the corner between the ceiling and the side wall of the car 7, and can also correspond to the car 7 having various shapes and dimensions.

FIG. 7A is a perspective view showing a lower rope fixing jig 75 for holding the old main rope 6 of the car rope fixing jig 32, and FIG. 7B is an enlarged perspective view of a part thereof. FIG. As shown in the figure, the lower rope fixing jig 75 includes a plate-shaped mounting metal 96 and a U-shaped hanging device 80e mounted on the mounting metal 96 with special bolts 81 and nuts 82.
And 80f, and a well-known rope chuck 101 attached to a mounting bracket 96 by a U-shaped hanging member 97, a bolt 98, a nut 99, and a wire 100. The lower rope fixing jig 75 hangs below the upper rope fixing jig 73 via the connecting tool 74 and is positioned outside the wall of the car 7. The rope chucks 101 are attached by the number of the old main ropes (six in the illustrated example), and fix the old main ropes 6 respectively.
The rope chuck 101 is useful because the main cable can be easily attached and detached quickly, reliably, and usefully. However, since the main cable may be damaged, it is used only for holding the old main cable 6 and the new main cable 6a.
It is desirable not to use it.

FIGS. 8 (a) to 8 (f) are detailed views showing a main rope storage device 31 which is a main rope storage device. As shown in the figure, the main rope storage device 31 is provided at the lowest floor 25 on the main rope supply device 1.
When the new rope 6a wound on 6 is pulled up on the car 7,
This is a storage place when the spare portion 6b of the new main rope 6a is stored on the ceiling of the car 7. The main rope storage tool 31 is entirely made of metal, and 110 is a donut-shaped flat bottom surface, and has a perfect circular hole from the center of the bottom. And 11
Reference numeral 1 denotes an outer circumferential wall, which is an endless cylindrical wall, and reference numeral 112 denotes an inner circumferential wall, which is an endless frustoconical wall. The upper circumference of the inner wall is made smaller than the lower circumference. Reference numeral 113 denotes a reinforcing plate on the inner wall, which has a cross shape. Although the figure has a cross shape, the shape may be an i-shape or may cover the entire surface. Reference numeral 114 designates two elongated oval holes facing each other on the outer wall, and a cutout around the hole is a handle hole for protecting a hand by winding a U-shaped elastic body such as rubber. Reference numeral 115 denotes an outlet of the spare portion 6b of the new main rope 6a when the new main rope 6a is inserted into the main rope storage tool 31 and the main rope storage tools 31 are stacked. When the bottom holes are stacked, the inner wall 112 of the lower main rope storage tool 31 enters the hole of the upper main rope storage tool 31, and the inner wall of the upper and lower main rope storage tools 31 and the inner Acts to prevent movement on the outside.

As described above, the main rope storage device 31, which is the main rope storage device used in the elevator main rope replacement method, includes the outer peripheral wall 111, the inner peripheral wall 112, and the bottom wall 110 which form an annular main rope storage space therebetween. The inner peripheral walls 111 are fitted to each other when stacked. An upper portion of the outer peripheral wall 111 is provided with at least two notches 115 for being pulled out through the extra portion 6b of the main rope 6a, and at least two notches 114 for handles to be engaged with the outer peripheral wall 112 during transportation are opposed to each other. And a buffer ring made of an elastic body is provided around the notch so as not to damage the hand of the operator. If such a main rope storage tool 31 is used, the main rope spare portion 6b can be properly arranged and stored in a narrow space on the car 7, and the safety and efficiency of work can be improved.

Next, the main rope replacement method of the first embodiment will be described with reference to the sectional view during construction of FIG. 1 and the sectional view of the construction procedure of FIG. First, as a work preparation, the car 7 is stopped on the top floor, which is the upper end of the hoistway, and in that state, the pit 1
In step a, the gap between the lower portion of the counterweight 8 and the tip of the shock absorber 17 is measured and recorded. This gap size is used as a standard for calculating the set value of the length of the new main rope 6a in order to match the inspection standard of the Building Standard Law. After measuring the gap size, the worker exits the pit 1a. Next, the car rope fixing jig 22 is set on the car 7 from the upper beam of the car 7 through the wire 71 and the wire 72 with both ends hooks. Then, the lock switch 25a of the landing door on the lowest floor 25 is short-circuited by a short-circuit line. FIG. 2A is an equivalent diagram.

Next, the main rope feeders 36 around which the new main ropes 6a to be exchanged are wound are prepared for the number of exchanges of the main ropes 6a (six in this example), and these are placed on the lowest floor. Then, raise the car 7 from the lowest floor so that it does not hinder the main rope replacement work.
m, stop the hemp rope from the top of car 7 and hoistway 1
One end to the pit la. Next, the door of the lowest floor landing is opened, the door is fixed so that the door is not closed, and the hemp rope is pulled out to the landing. Connect the tip of the new main rope 6a with the hemp rope pulled out, pull up the hemp rope from above the car 7, raise the new main rope 6a onto the car 7 by the length corresponding to the margin described later, and fix the car. An upper rope fixing jig 73 for fixing the new main rope 6a of the jig 32 is provided with a margin 6b at the tip of the new main rope 6a and fixed. The spare portion 6b is a main rope portion between the fixing portion of the car fixing jig 32 and the tip of the new main rope 6a, and the tip of the new main rope is located when the car is located near the upper end of the hoistway. It is a part of sufficient length that it can be connected to the car through the hoist in the machine room. The spare portion 6b of the new main rope 6a is stored in the main rope storage tool 31 installed on the car 7. This operation is repeated for the number of the new main ropes 6 a, and the whole is fixed to the car fixing jig 32, and the spare portion 6 b is stored in the main rope storage tool 31. FIG. 2B is an equivalent diagram.

At the lowermost floor 25, the car 7 is raised to the uppermost floor while the new main rope 6a is extended from the main rope supply device 16. After reaching the top floor, the worker enters the pit 1a and receives the weight receiving beam 18 from the landing. Next, the car 7 is signaled from the pit 1a, and the car 7 is lowered until the weight receiving beam 18 enters below the counterweight 8, and the counterweight 8 is raised. And if it becomes a gap into which the weight receiving beam 18 enters,
The weight receiving beam 18 is arranged below the counterweight 8, the car 7 is raised, and the counterweight 25 is set on the weight receiving beam 18 to hold the counterweight 25. FIG. 2C is an equivalent diagram.

Next, the current position of the car 7 is marked on the guide rail, and then, based on the new gap size after the main rope replacement calculated from the gap size measured at the pit 1a,
The position of the catch allowance of the car 7 is marked on the guide rail as described above, and the slinging wire 14 lowered from the machine stand of the machine room 2 and the slinging wire 14 to be applied to the upper beam of the car 7
a and the chain block 15 are attached, and the upper beam of the car 7 is lifted by the chain block 15 to the position of the above-mentioned mark, and the car is held at that position. As a result, all the old main ropes 6 are in a state of hanging around. At this time, basket 7
It is desirable that the safety gear be operated and stopped. FIG. 2D is an equivalent diagram.

Next, the guide rail 2 on the counterweight 8 side
The rope fixing jig 21 is attached and fixed at a position substantially at the same height as the upper end of the zero car 7. Then, all of the old main ropes 6 on the counterweight 8 side are fixed with a rope fixing jig 21, and all of the fixed old main ropes 6 are cut at an intermediate cutting point 28 immediately above the rope fixing jig 21. FIG. 2E is an equivalent diagram.

Then, one cage 9 attached to the upper beam of the car 7 is removed, and the main rope storage tool 31 on the car 7 is removed.
One spare main rope 6b is taken out from the main rope 6, and the old main rope 6 above the intermediate cutting point 28 on the counterweight 8 side of the detached main rope 6 is removed.
Is connected to the end of the main rope spare portion 6b with a clip. Next, the old main rope 6 on the counterweight 8 side connected in the machine room 2 is pulled up. When the new main rope 6a is pulled up to the machine room 2, the extra portion of the new main rope 6a is further pulled up to the machine room 2, and the clip is removed. Next, the old main rope 6 of the cage 9 removed on the car 7 side is pulled up and removed. And machine room 2
In the above, the spare portion 6b of the raised new main rope 6a is wound around the sheave and the deflector wheel 22 of the hoisting machine 3, the terminal is processed, the retainer 9 is fixed to the new main rope 6a, and the retainer 9 is attached. New main rope 6a
Is lowered onto the car 7 and connected to the upper beam of the car 7. next,
The new main rope 6a connected to the car 7 is detached from the upper rope fixing jig 73 of the car fixing jig 32 for fixing the new main rope 6a. Such an operation is repeated for the number of the old main ropes 6, and all the upper parts of the old main ropes 6 are removed and the new main ropes 6 a are removed from the car 7.
All the retainers 9 are fixed to the upper beams, and all the new main ropes 6a are fixed by the upper rope fixing jig 73. FIG. 2F is an equivalent diagram. As described above, if the old main rope 6 coming out of the machine room 2 is used to pull up the margin 6b of the new main rope 6a into the machine room 2, the new main rope 6a is operated by operating the hoisting machine 3. Can be pulled up together with the old main rope 6, but it is also possible to pull it up by a hoist (not shown) using, for example, a hemp rope (not shown) different from the old main rope 6a.

Next, the worker enters the pit 1a, places the work ladder 19 on the upper end of the counterweight 8, climbs the work ladder 19, and places the old ladder immediately above the retainer 9 fixed to the upper part of the counterweight 8. At the lower end cutting point 29 of the rope 6, all the old main ropes 6 are cut, and all the cages 9 are removed from the counterweight 8. At the top of the counterweight 8, set the length of the new main rope 6a,
The whole new main rope 6a is cut to the set value. Then, similarly to the car 7 side, the cut end is processed and the retainer 9 is fixed,
The whole arrangement is fixed on the counterweight 8 in the same arrangement as before. Thereafter, the emergency stop device is released, the chain block 15 is lowered, the tension of the new main rope 6a is applied to the car 7 so that the tension becomes uniform, and the hanging jig of the car 7 is removed. Thereafter, the car 7 is lowered to raise the counterweight 8, and the weight receiving beam 18 is released and removed, and at the same time, the tools and jigs of the pit 1a are removed, and the worker also exits from the pit 1a. Then, basket 7
The old main rope 6 fixed to the rope fixing jig 21 on the counterweight 8 side is connected to the old main rope 6 by a lower rope fixing jig 75 for fixing the old main rope of the car fixing jig 32. Fix all the cars one by one and raise the car 7 so that the old main rope 6 becomes the car fixing jig 3
Confirm that it is fixed at 2 (the old main rope 6 fixed to the rope fixing jig 21 is in a state of hanging around)
Then, all of the old main ropes 6 fixed to the rope fixing jig 21 on the counterweight 8 side are released. FIG. 2G is an equivalent diagram.

On the car 7 (excluding the car rope fixing jig 32, the wire 71, and the wire 72 with hooks at both ends), remove the tools and jigs in the machine room 2, contact the car 7, and lower the car 7 When the terminal under the old main rope 6 comes near the floor of the pit 1a, the car 7 is stopped. Then, all the terminals below the old main ropes 6 are taken out to the floor of the lowest floor 25, and all the old main ropes 6 are wound up while the car 7 is lowered. FIG.
(H) is an equivalent figure.

Then, the car 7 stops the car 7 in front of the middle floor, and further descends while confirming that the balancing rope 8 does not hit the car rope fixing jig 32, and the car 7 is about 2 m below the lowest floor 25. Stop basket 7 shortly before. Then, basket 7
All the old main ropes 6 fixed to the car rope fixing jig 32 are released, and all the old main ropes 6 are dropped into the pits 1a. Thereafter, the winding device 20 removes all the old main ropes 6 by winding. FIG. 2 (i) is an equivalent diagram.

Next, the car rope fixing jig 32, the wire 71, the wire 72 with both ends hook and the like on the car 7 are removed, and the test operation and the inspection and adjustment of the tension of the new main rope 6a are performed. FIG. 2 (j) is an equivalent diagram. Thus, the main cable replacement work is completed.

According to the above-described main cable exchanging method, since the old main cable 6 and the new main cable 6a are removed and attached together, the work time is greatly reduced, and the most common elevator In this case, it can be reduced to about 30% of the conventional value. In addition, there are few working places, such as the landing on the lowest floor 25, the hoistway 1, and the machine room 2, so it is possible to work in a limited building where the landing on the top floor or middle floor cannot be used or there is no structure. Which is especially effective for chimney elevators,
Applicable to any existing building.

[0039]

As described above, in the elevator main rope replacement method of the present invention, the car is stopped at the lower end of the hoistway, the new main rope is placed near the lower end of the hoistway, and one end of the new main rope is placed near the lower end. Is fixed to the car by the car rope fixing device, and when the car is located near the upper end of the hoistway between the fixing portion and the tip, the tip of the new main rope is connected to the car through the hoist in the machine room. Form a sufficient margin to obtain it, hold this margin by the main rope storage device provided on the car, raise the car together with the new main rope to the upper end of the hoistway, and at the same time, raise the balancing weight at the lower end of the hoistway. , Hold the car and the counterweight in their respective positions, hold and fix the old main rope at the upper end of the hoistway, cut the old main rope above the fixed position and separate it from the car and remove it. Is the extra main rope going through the hoist? The other end of the old main rope connected to the car and fixed is connected to the car, released from fixing at the upper end of the hoistway, the other end is separated from the counterweight, and the other end of the new main rope is connected. The old main ropes connected to the car are collected from the lower end at the lower end of the hoistway while the car is lowered and the car is lowered. Therefore, exchange of a plurality of main ropes can be easily and collectively performed for all existing buildings, work can be performed safely and in a short time, and elevator suspension time can be reduced. In addition, since the landing other than the lowest floor is not used during the work, there is an effect that the main rope can be replaced even in an elevator having severe stopping conditions.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a method of exchanging a main rope of an elevator according to an embodiment of the present invention.

FIG. 2 shows details of an elevator main rope replacement method according to an embodiment of the present invention, and FIGS. 2 (a) to 2 (j) are schematic views showing respective steps.

3 is a view showing the rope fixing jig of FIG. 1, wherein FIG. 3 (a) is an exploded perspective view and FIG. 3 (b) is an enlarged perspective view showing details.

FIG. 4 is a sectional view showing an embodiment of the car rope fixing jig of FIG. 1;

5 is a view showing the upper rope fixing jig shown in FIG. 4, wherein FIG. 5 (a) is an exploded perspective view and FIG. 5 (b) is a partially enlarged perspective view.

FIG. 6 is a view showing the connection tool shown in FIG. 4;
6A is a perspective view, FIG. 6B is a cross-sectional view along line AA in FIG. 6A, and FIG. 6C is a cross-sectional view along line BB in FIG. It is.

7 is a diagram showing the lower rope fixing jig of FIG. 4, wherein FIG. 7 (a) is an exploded perspective view and FIG. 7 (b) is a partially enlarged view.

FIG. 8 is a view showing the main rope storage device shown in FIG. 1;
8A is a front view, FIG. 8B is a side view, FIG. 8C is a plan view, FIG. 8D is a cross-sectional view taken along line AA of FIG. 8E is a perspective view, FIG. 8F is a cross-sectional view along line AA in FIG. 8A, and FIG. 8G is a cross-sectional view showing a state in which main rope storage tools are stacked.

FIG. 9 is a cross-sectional view showing a conventional method of exchanging a main rope of an elevator.

[Explanation of symbols]

1 hoistway, 2 machine room, 3 hoisting machine, 4 deflector car,
6 old main rope, 6a new main rope, 7 cages, 8 counterweights, 11 wire winches, 15 chain blocks, 1
8 Weight receiving beam, 19 Work ladder, 21 Rope fixing jig, 32 Car rope fixing jig, 26 Main rope winder.

Claims (7)

[Claims] A car is stopped at the lower end of the hoistway, a new main rope is placed near the lower end of the hoistway, and one end of the new main rope is fixed to the car by a car rope fixing device. In the meantime, when the car is located near the upper end of the hoistway, a sufficient margin is formed so that the tip of the new main rope can be connected to the car through a hoist in a machine room. Maintained by the main rope storage device provided on the car, raise the car together with the new main rope to the upper end of the hoistway, at the same time lower the counterweight to the lower end of the hoistway, the car and the counterweight respectively The old main rope is held and fixed at the upper end of the hoistway, and the old main rope is cut above the fixed position and separated from the car to be removed. Through the winder from above The one end of the remaining old main rope connected to the car is connected to the car, released from being fixed at the upper end of the hoistway, and the other end is separated from the counterweight. The other end of the main rope is connected to the counterweight, and the old main rope connected to the car is recovered from the lower end at the lower end of the hoistway while lowering the car. 2. The step of connecting the spare part of the new main rope to the car after passing the hoist through a hoist, connecting the spare part of the new main rope to a car side part of the old main rope, 2. The method according to claim 1, further comprising the step of pulling up the spare portion into the machine room by pulling up the car-side portion of the wire into the machine room. 3. The step of connecting the spare portion of the new main rope to the car through a hoist and then pulling up the old main rope into a machine room, and extending a rope different from the old main rope from the machine room. 2. The method according to claim 1, further comprising a step of connecting the extra main rope to the extra space and pulling up the rope into the machine room by pulling up the rope into the machine room.
Elevator main cable replacement method as described. 4. The method according to claim 1, wherein the main rope is extended and wound in accordance with the elevation of the car on the lowest floor. 5. A main rope storage device used in the elevator main rope exchange method according to claim 1, comprising an outer peripheral wall, an inner peripheral wall, and a bottom wall which form an annular main rope storage space therebetween, and stacked. The main rope storage device, wherein the inner peripheral walls are fitted to each other when the main ropes are in contact with each other. 6. A rope fixing device for a car used in the elevator main rope replacement method according to claim 1, wherein the upper rope fixing jig is attached to the car and fixes and supports a new main rope. A flexible connecting device connected to the fixing jig, a lower rope fixing jig connected to the other end of the connecting device and fixedly supporting the main rope, wherein the upper rope fixing jig is Complementary to the surface profile of the new main rope,
A cage rope fixing device comprising a rope groove having an inner peripheral surface in surface contact with the new main rope. 7. The rope fixing device for a car according to claim 6, wherein the connecting tool includes a curing cloth for protecting the main rope.