JP3444816B2 - How to replace the main elevator cable - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for exchanging an elevator main rope, and more specifically, in a machine room-less elevator, a hoisting machine is installed on an upper part of a hoistway, and a main rope holding on a car side is a lower part of a car frame. The present invention relates to a method of exchanging main ropes of, for example, a side fork type elevator fixed to the.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 8 is a cross-sectional view of, for example, a side fork type elevator installation during a conventional main rope replacement operation, and FIG. 9 is a plan view of the main rope attaching portion.

In FIG. 8, reference numeral 1 is a basket in which passengers board, 2 is a hoist for raising and lowering the basket 1, 3 is a guide rail for a basket for guiding the raising and lowering of the basket 1, 4 is a counterweight, and 5 is a counterweight 4. It is a guide rail for the weight that guides the lifting and lowering of the. 6
Is an old main rope that needs to be replaced, and is connected to the counterweight 4 and the basket 1 via the hoisting machine 2. 6a is a new main rope that is exchanged for the old main rope 6. Although not shown in the drawing, neither the new nor old main ropes are used. 37 is a hanging jig used when replacing the old main rope 6 fixed to the basket 1 with the new main rope 6a, and 37a is a jig fixed to the old main rope 6 side. 8 is a weight buffer for the fall of the counterweight 4, 9 is a basket buffer for the fall of the basket 1, both of which are
It is arranged at the bottom of the hoistway 10 for moving up and down. At the bottom of the hoistway 10, a pit 11 is provided as a maintenance place. Incidentally, 26 is a door of the basket 1, and 27 is a threshold for guiding the door 26.

In FIG. 9, reference numeral 12 in the drawing indicates the old main rope 6
Is a regular hole for fixing the old main rope 6, and 14 is a dummy hole for temporary attachment used when replacing the old and new main ropes.

The replacement work in the conventional replacement method will be described below with reference to FIGS. Old work 1 First, since the old main rope 6 on the side of the basket 1 is fixed to the main rope attachment portion 12 on the lower end side of the basket 1, once the basket 1 is placed near the bottom floor of the hoistway 10 as shown in the figure. Stop. Old work 2 Next, the suspension jig 37 is hung on the ceiling of the basket 1 and is suspended in the middle of the old main rope 6 extending right above the basket 1, and the suspension jig 37 is used. , A basket 1 in the middle of the old rope 6
Keep the hanged state. Old work 3 Next, the tension of the remaining portion of the old main rope 6 fixed to the basket 1 side, which is located on the lower end side of the intermediate portion, is released. Old work 4 Next, in the pit 11, the regular hole 1 of the main rope attachment portion 12
Among the several old main ropes 6 fixed to 3, the loosened old main ropes 6, for example, 1 to 2 are removed and suspended in the dummy hole 14 of the main rope attaching portion 12 and fixed. In this case, the old main rope 6
At least one of the two remains in the suspended state.

Old work 5 Next, one end of each of the new main ropes 6a corresponding to the number transferred from the top of the basket 1 to the dummy hole 14 is lowered onto the pit 11 and fixed to the corresponding regular holes 13. . On the other hand, the other ends of these new main ropes 6a are held on the ceiling of the basket 1. Old work 6 Next, the suspension of the basket 1 is released, and the old main rope 6 that remains is tensioned to remove the hanging jig 37. Old work 7 Next, move the basket 1 to the vicinity of the top of the hoistway 10,
The balance weight 4 is appropriately fixed in the vicinity of the pit 11 with a lumber (not shown) or the like, and the basket 1 is placed on a hoisting jig (not shown) suspended from a machine table or the like in the hoistway 10. Hoist it,
Relieve the tension of the old main rope 6. Old work 8 Next, all the one ends of the old main ropes 6 fixed to the upper part of the counterweight 4 in the pit 11 are removed, and all the removed old main ropes 6 are pulled up and held on the ceiling of the basket 1. To do. Old work 9 Next, the other end of the new main rope 6a held on the ceiling of the basket 1 is hung on the hoisting machine 2 and lowered to the side of the counterweight 4, and the new main rope 6a is placed above the counterweight 4. Fix the other end of all.

Old Work 10 Next, the suspension of the basket 1 is released and the suspension jig 37 is removed. Old work 11 Next, the basket 1 is lowered to release the fixing of the counterweight 4, the timber and the like are removed, and the basket 1 is lowered to the pit 11 by an operation on the ceiling of the basket 1. Old work 12 Next, after the descending basket has stopped, the old main ropes 6 fixed to the dummy holes 14 and the regular holes 13 are removed and pulled up onto the basket 1. Old work 13 Next, the other end of the remaining new main rope 6a on the ceiling of the basket 1 is lowered from the top of the basket 1 into the pit 11 and fixed in the regular hole 13. Old work 14 Finally, the old main rope 6 and the hanging jig 37 are removed from the ceiling of the basket 1, the tension of the new main rope 6a is adjusted, and the main rope replacement work is completed.

[0008]

As described above, according to the conventional method, when replacing the old main rope 6, the car 1 is moved to the vicinity of the pit 11, that is, the lower part of the hoistway and the uppermost part of the hoistway 10, that is, the hoistway. In the upper part of the road, the car 1 must be re-suspended twice, and the old main ropes 6 must be re-attached by using the dummy holes 14, that is, re-suspended relocation work must be performed. However, there is a problem that the work procedure is complicated and requires a long work time. Further, in a relatively small space on the ceiling of the car 1, it is necessary to re-suspend the car 1 while holding a required number of new lobes 6a as new main ropes. It has become difficult to secure them, which has been one of the causes of requiring a long working time.

In particular, in the main rope replacement work of an elevator of the type in which the main rope holding portion is set below the car 1 (under the floor), the main rope holding portion is set on the ceiling of the car 1. Compared to the elevators, the work efficiency is extremely poor because the cage 1 is re-suspended twice when the new main rope is attached or the old and new main ropes are replaced, and the main rope is replaced one by one. There are challenges. It is an object of the present invention to solve the above problems and provide a main rope replacement method capable of efficiently exchanging a main rope with a simple procedure.

[0010]

According to a first aspect of the present invention, first, a suspending jig for suspending a counterweight is placed in an appropriate position above the hoistway with a ceiling of a basket moved above the hoistway as a scaffold. In addition to providing the work scaffolding for suspending the counterweight to the suspension jig, the basket is moved to the lower part of the hoistway and fixed, and the counterweight moved upward is used for the old main scaffold. After suspending from the rope to the suspension jig, remove the old main rope from the basket fixed below the hoistway, attach one end of the new main rope to the basket and the other end to the balance weight, and After returning to the predetermined position, the basket is raised, and the work scaffold and the hanging jig are removed while using the ceiling of the basket as a scaffold.

According to a second aspect of the present invention, the basket is positioned above the hoistway, and the ceiling of the car is used as a scaffolding for scaffolding at a suitable portion of the equipment in the hoistway. The first work of installing the scaffold, and at the position where the basket is appropriately lowered, use the ceiling of the basket as a scaffolding and install the scaffold used for suspending the counterweight at a suitable part of the equipment in the hoistway. The second work to do, the third work to lower and fix the basket below the hoistway so that the counterweight moves to the suspending work position, and the work was anchored to one end of the old main rope in the work scaffold. The fourth work of suspending the existing counterweight to a hanging jig, the fifth work of removing the other end of the old main rope 6 from the basket below the hoistway, and the fifth operation of removing the old main rope from the counterweight on the work scaffold. 6 work and one end of the new main rope in the above work scaffolding Seventh work of attaching the counterweight to the weight, the eighth work of attaching the other end of the new main rope to the basket below the hoistway, the ninth work of attaching the counterweight to the weight guide rail in the work scaffold, and the basket. After removing the above work scaffold using the ceiling of the basket as a scaffold,
Further, a tenth operation of raising the basket and removing the hanging jig by using the ceiling of the basket as a scaffold is also included.

The invention of claim 3 is characterized in that, in the method of replacing an elevator main rope according to claim 2, the work from the first work to the tenth work is carried out in order.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. In the exchange method shown in the first embodiment, first, a suspending jig for suspending a counterweight is placed at a proper position in the hoistway while using the ceiling of the basket moved above the hoistway as a scaffold. After providing a working scaffold for suspending the counterweight on the suspension jig, move the basket to the lower part of the hoistway to fix it, and then move the counterweight moved upward to the above-mentioned work scaffold from the old main rope. After suspending to a hanging jig, remove the old main rope from the cage fixed below the hoistway, and further attach one end of the new main rope to the basket and the other end to the counterweight, After returning the weight to a predetermined position, raise the basket and remove the work scaffold and the hanging jig while using the ceiling of the basket as a scaffold.

The first embodiment will be described below with reference to FIGS. 1 to 4. FIG. 1 is a vertical cross-sectional view of elevator equipment during main rope replacement work, and FIG. 2 is a plan view of a work scaffold. Incidentally, in these figures, the same reference numerals as those in FIGS. 3 is a vertical sectional view of the side fork type elevator equipment, and FIG. 4 is a horizontal sectional view thereof.

The size of the gap between the counterweight 4 and the weight shock absorber 8 on the side of the pit 11 is adjusted with the preparation basket 1 for the new main ropes positioned above the hoistway 10, which is the top floor level in this example. By measuring, the length dimension of the new main rope 6a to be newly exchanged is calculated, and the new main rope 6a is shaped. Also check the position of the car 1 below the hoistway, in this example above the counterweight 4 when it is at the lowest floor level. Of course, in order to omit this preparatory work on the day of replacement work at the site, at the stage before the work day,
Alternatively, the new main rope 6a may be prepared by shaping the rope into a size calculated based on the value measured during the inspection and treating both ends of the rope. Note that this preparation work is not different from the old replacement method.

Work 1 (Installation of Suspending Jig) First, with the basket 1 positioned above the hoistway 10, in this case the uppermost position, for suspending the counterweight 4 when suspending the counterweight 4, Attach the hanging jig 7 to the hoistway 10.
It is arranged at an appropriate portion in the inside, for example, at an appropriate portion such as a machine base of the hoisting machine 2 and its related equipment. This work 1 is performed by using the ceiling of the basket 1 as a scaffold. In this example, the rope 50 or the like is used as a suitable rope, and the upper end side is locked to the machine base of the hoisting machine 2 and pulled down, and the lower end side is pulled down, for example, hung on the old main rope 6. The counterweight 4 is re-suspended via the suspension jig 7 that has been used, for example, a chain block.
The counterweight 4 may be suspended on the weight guide rail 5 instead of the hoist 2 side. This work 2
Is performed before the work scaffold 15 to be described later is installed. When the work 1 is executed, the basket 1 that is stopped and fixed at the lowest position as described later is located at the highest position in the work 1. Therefore, it is advantageous in terms of work efficiency to carry out the procedure according to the procedure for lowering the basket 1.

Work 2 (installation of work scaffolding) Next, after performing the above work 1, the car 1 is further lowered, and, for example, at the position where it is moved to the vicinity of the top floor landing floor, the car 1 is moved. Using the ceiling as a scaffold, a work scaffold 15 supported by the car guide rail 3 is provided at an appropriate portion in the hoistway 10, for example, the car guide rail 3. The work scaffold 15 is used for suspending the counterweight 4 located above the hoistway or for hanging the main rope around the hoisting machine 2.

The work scaffold 15 shown in this example is temporarily installed on the basket guide rail 3. A part of the work scaffold 15 is provided with a support bracket 16 to guide the basket guide rail 3
Install with bolts, rail clips, nuts (not shown), etc. The support bracket 16 is provided with a mounting hole for fixing the arm 17 at one of its both ends, and a mounting hole for mounting the oblique holding member 18 at the other end. Further, one end of the arm 17 has a mounting hole for fixing it to the support bracket 16 fixed to the basket guide rail 3 with a bolt or the like, and the other end thereof has an oblique holding member 1
Mounting holes for mounting 8 are respectively provided. The diagonal retaining member 18 fixes the support bracket 16a and the arm 17 to increase the load bearing strength of the arm 17.

In FIG. 2, a scaffolding plate 19 which constitutes the scaffolding 15 for work is fixed on, for example, a numbered line or the like on an arm 17 formed in a U-shape as a scaffolding frame at both ends in the longitudinal direction. It forms the floor. Reference numeral 20 in the figure
Is a veneer plate as a flat plate placed between the scaffolding plates 19 to close the gap between the scaffolding plates 19. Further, reference numeral 21 is a ladder bridged between the installation place of the hoisting machine 2 and the work scaffold 15, 22 is a control panel, 23 is a landing, 24 is a landing side door, and 25 is a door 24. It is a threshold to do.

Work 3 (fixing of the basket 1) Next, after completing the above work 2, the basket 1 is further lowered,
The basket 1 is positioned and fixed below the hoistway 10, near the bottom floor in this example. At this time, the counterweight 4 is located above the hoistway 10 on the contrary. That is, it is advisable to determine the descending position of the basket 1 on the work scaffold 15 so as to be the most suitable position for suspending the counterweight 4 on the suspending jig 7. When the car 1 is positioned at the lowermost position in this way, the car 1 is fixed under the floor of the car 1 for stability, and the floor surface of the pit 11 and the floor surface of the car 1 that stops above the floor surface are stable. In order to obtain a required work space, that is, a height, a square bar or the like may be interposed as an appropriate intervening member 30.

Work 4 Next, in the work scaffolding 15 described above, the balance weight 4 still anchored to the old main ropes 6 is lifted by the hoisting jig 7, and the hoisting machine 2 and the machine base of the related equipment are placed. Etc. As a result, the old main rope 6 is released from tension. The hanging weight 4 may be held by the weight guide rail 5 via an appropriate auxiliary tool or the like.

Work 5 Next, in the pit 11 below the hoistway, the old main rope 6 whose one end on the basket 1 side is fixed is fixed to the main rope fixing portion 1 of the basket 1.
All of the old main ropes 6 are pulled up and held on the work scaffolding 15 by removing all from 2. Then the ladder 21 is used as the work scaffold 15
Use it as a cradle and hang it on the hoist 2 side. The ladder 21 may be a stepladder.

Work 6 Next, all the old main ropes 6 fixed to the upper part of the counterweight 4 are removed.

Work 7 Next, the new main rope 6a is wound around the work scaffold 15 in a desired state via the sheave of the hoisting machine 2, and the new main rope 6a is fixed. Install one end all over the balance weight 4. Then, the ladder 21 is removed.

Work 8 Next, the other end of the new main rope 6a is lowered to the lower part of the hoistway 10, that is, the pit 11 which is the bottom in this case, and all are fixed to the main rope fixing portion 12 of the basket 1.

Work 9 Next, in the scaffold 15 for work, in order to cancel the temporary suspension of the balance weight 4 by the suspension jig 7, the balance weight 4 is naturally moved from the suspension jig 7 along the weight guide rail 5. take down. Thus, the load is applied to the new main rope 6a.

Work 10 Next, the basket 1 is temporarily lifted so as to float so as to release the fixation of the basket 1, and at the same time, the intervening members such as the squares 30 under the basket 1 and the working materials are removed.

Work 11 Next, the car 1 is raised to, for example, the vicinity of the top floor, and the car 1
After removing the work scaffolding 15 using the ceiling above as a scaffold, the basket 1 is further raised, and the hanging jig 7 is removed using the ceiling above the basket 1 as a scaffolding.

Work 12 Finally, the tension of the new main rope 6a is adjusted to complete the replacement work.

According to the above work procedure, one counterweight 4 side is hung above the hoistway 10, in this example near the top, and the other basket 1 is stopped and fixed near the pit 11. Therefore, unlike the conventional case, it is not necessary to provide a dummy hole in the main rope attachment portion 12 or to change the fixing position of the old main rope 6a. The main rope can be replaced easily and smoothly in a short time. Further, since the working scaffold 15 is provided near the top of the hoistway 10 in this example, the storage location for the old and new main ropes 6 and 6a is relatively wide compared to the space above the ceiling of the basket 1. It can be secured on the scaffolding 15, and the replacement work can be performed smoothly.

Embodiment 2. Embodiment 2 is a work scaffold 1
5 shows an example in which two scaffolds, a main scaffold and an auxiliary scaffold, are provided above and below. The second embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a vertical sectional view of the elevator equipment, and FIG.
FIG. As shown in FIG. 5, the counterweight 4
When the position of is far from the hoisting machine 2,
By using the above-mentioned work scaffold 15 as a main scaffold, an auxiliary scaffold is provided below the scaffold, and the ladder 21 is bridged between the scaffolds to ride the auxiliary scaffold and hang the main rope around the sheave of the hoisting machine 2. , Perform main rope replacement work such as removal. With this configuration, when the working position of the original work scaffold 15 is too high, the replacement work can be efficiently and smoothly performed with the auxiliary scaffolding added to the appropriate work position. .

Embodiment 3. In the third embodiment, the arm 1
This is an example of bridging a scaffolding board to be laid over. As shown in FIG. 7, in the work scaffold 15,
When the position of the arm 17 is almost the same as the height of the floor of the landing 23, instead of attaching both ends of the scaffolding plate 19 to both arms of the U-shaped arm 17 in the first embodiment,
The right end of the scaffolding plate 19 is not attached to the arm of the arm 17 on the landing 23 side, but the floor of the landing 23 is used instead of the arm of the arm 17 and is attached thereto. According to this structure, the scaffolding plate 19 can be attached to the arm 15 only on one side, which is the back side when viewed from the landing 23 side, and the work time for scaffolding attachment can be reduced.

[0033]

In each of the first to third aspects of the invention, in the prior art, the cage had to be hung twice in order to replace the new main rope, but in the present invention, the work is performed above the hoistway. Since the worker's position can be secured by providing the scaffolding, the old and new main ropes can be easily and smoothly replaced by merely suspending the hanging weight once.

Further, in the conventional method, it was necessary to provide a dummy hole in the main rope attachment portion of the basket to temporarily change the attachment location of the old main rope, but in the present invention, the weight side is raised and lowered. Since the hanging basket is stopped near the pit above the road to work, dummy holes are not required, and temporary work for changing the mounting location of the old main rope is not necessary.

Further, in each of the inventions, in the replacement work,
The main work of the replacement work can be completed on the outward path of lowering the basket from the upper part of the hoistway to the lower part, and on the return route returning the basket from the lower part to the upper part, the tools, various materials and scaffolding used for the replacement work Since the removal work can be performed in order, the replacement work can be performed more efficiently than in the conventional case.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of elevator equipment at the time of main rope replacement work shown in a first embodiment.

2 is a plan view of the work scaffold of FIG. 1. FIG.

FIG. 3 is a vertical cross-sectional view of a side fork type elevator equipment.

FIG. 4 is a cross-sectional view of a side fork type elevator installation.

FIG. 5 is a vertical cross-sectional view of the elevator equipment shown in the second embodiment.

FIG. 6 is a plan view of the work scaffold of FIG.

FIG. 7 is a plan view of the work scaffold shown in the third embodiment.

FIG. 8 is a cross-sectional view of, for example, a side fork type elevator installation during a conventional main rope exchange operation.

9 is a plan view of the main rope attachment portion of FIG. 8. FIG.

[Explanation of symbols]

1 basket, 2 hoisting machines, 3 guide rails for baskets, 4
Counterweight, 5 weight guide rail, 6 old main rope, 6a
New main rope, 7 suspension jig, 8 weight shock absorber, 9 basket shock absorber, 10 hoistway, 11 pit, 12 main rope attachment part,
13 regular holes, 14 dummy holes, 15 working scaffolds, 1
6 support bracket, 16a support bracket, 17
Arms, 18 diagonal support members, 19 scaffolding plates, 20 flat plates, 21 ladders, 30 square members (intervening members), 50 ropes (cord).

Claims (3)

(57) [Claims] 1. First, a suspending jig for suspending a counterweight is placed at a proper place in the hoistway while using a ceiling of a basket that has been moved above the hoistway as a scaffolding. After the work scaffold for suspending the counterweight is provided, move the basket to the lower part of the hoistway to fix it, and then lift the counterweight moved upward from the old main rope to the suspending jig on the work scaffold. , Remove the old main rope from the cage fixed below the hoistway, attach one end of the new main rope to the above cage and the other end to the above counterweight, return the counterweight to the specified position, and then raise the cage. , A method for replacing an elevator main rope, which comprises removing a work scaffold and a hanging jig while using the ceiling of a basket as a scaffold. 2. A car is positioned above a hoistway, and a hanging jig used for suspending a counterweight is arranged at an appropriate site of equipment in the hoistway with the ceiling of the car as a scaffold. 1 work, and the second work of placing the scaffold used for suspending the counterweight at the appropriate position of the equipment in the hoistway with the basket being properly lowered and using the ceiling of the basket as a scaffold. , The third work of lowering and fixing the basket below the hoistway so that the counterweight moves to the lifting work position, and the counterweight still anchored at one end of the old main rope in the work scaffold The fourth work to hang it on a hanging jig, the fifth work to remove the other end of the old main rope 6 from the basket below the hoistway, and the sixth work to remove the old main rope from the counterweight on the work scaffolding.
Work, 7th work of attaching one end of the new main rope to the counterweight in the work scaffolding, 8th work of attaching the other end of the new main rope to the basket below the hoistway, and counterweight in the work scaffolding The 9th work of attaching the to the guide rail for the weight, and raising the basket, using the ceiling of the basket as a scaffold to remove the above work scaffolding, and then raising the basket further to use the same ceiling as the scaffold. First to remove the above hanging jig
A method for replacing an elevator main rope, which includes zero work. 3. The method of replacing an elevator main rope according to claim 2, wherein the first work to the tenth work are performed in order.