JP2006240842A - Main rope exchanging method and suspension plate used therefor of traction system/lower part suspension system elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a main rope exchanging method of a traction system/lower part suspension system elevator requiring exchanging of a main rope capable of avoiding operation of a slack type emergency stopping device of a cage moved to an upper part of a hoistway even when it is applied to an elevator equipped with the slack type emergency stopping device, and a suspension plate used therefor. <P>SOLUTION: The method for exchanging the main rope includes the steps of: mounting a shackle 9 on one end of a new main rope 6b to be installed on a rope stopping beam 11; mounting a temporary rope stopping plate 20 to an upper part side of the rope stopping beam 11 of the shackle 9 of the new main rope 6b; moving the cage 7 to the uppermost floor or near to the uppermost floor in a state of the shackle 9, on one end of the already installed main rope 6a, being mounted on the temporary rope stopping plate 20; mounting the suspension plate 14 on the new main rope 6b at the upper part of the cage 7; suspending the suspension plate 14 with respect to a cage return beam using a chain block 22; and generating a tension in the part between the suspension plate 14 of the new main rope 6b and the rope stopping beam 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a main rope replacement method and suspension plate for a 1: 1 roping traction type and lower suspension type elevator, and more particularly to a main rope replacement method for an elevator equipped with a slack type emergency stop device.

  In the conventional main rope replacement method of the traction type and lower suspension type elevator, the car is first moved to the pit side of the hoistway, and the car is lifted with a lifting tool in the pit to cause slack in the existing main rope. Then, the dummy rod is attached to the dummy rod mounting hole, the car side rope socket of the existing main rope is transferred from the car side rod to the dummy rod, and the car side rope socket of the newly installed main rope is attached to the vacant car side rod. Next, the car is moved to the vicinity of the upper part of the hoistway, and the car is lifted with a lifting tool to cause slack in the existing main rope. Then, remove the existing main rope from the weight side rod, pull it up on the car, then hang the new main rope on the drive sheave and lower the weight rope rope socket on the new main rope to the empty weight side rod. Install. Next, the car is moved to the pit side, the dummy rod to which the car side rope socket of the existing main rope is attached is removed, the existing main rope is removed, and the replacement work of the main rope is completed (for example, Patent Document 1). reference.)

JP 2000-143122 A

In the conventional main rope replacement method for the traction type and lower suspension type elevator, the car is moved to the vicinity of the upper part of the hoistway, and the car is lifted by a lifting tool to generate slack in the existing main rope. Then, remove the existing main rope from the weight side rod, pull it up on the car, then hang the new main rope on the drive sheave and lower the new main rope's weight side rope socket to the empty weight side rod. A step of attaching.
Therefore, when this conventional main rope replacement method is applied to a traction type and lower suspension type elevator equipped with a slack type emergency stop device, the car is moved to the vicinity of the upper part of the hoistway, and the car is lifted by a lifting tool to lift the existing main rope. If slack is generated in the rope, the slack type safety device is activated. And since the cage | basket | car is located in the vicinity of a hoistway, the malfunction that the action | operation of a slack type | formula emergency stop apparatus cannot be cancelled | released will generate | occur | produce.

  The present invention has been made to solve the above problems, and even when applied to an elevator equipped with a slack type emergency stop device, the operation of the slack type emergency stop device of the car moved to the upper part of the hoistway is avoided. It is an object of the present invention to obtain a main rope replacement method for a traction type and lower suspension type elevator and a suspension plate to be applied to the main rope replacement which can be changed.

  In this invention, the car is stopped at the lowermost floor or in the vicinity of the lowermost floor, a suspension plate is attached to the upper side of the existing main rope, and the cage is lifted from the suspension plate using a lifting tool. And a step of generating a slack in a portion between the suspension plate of the existing main rope and the rope fastening beam, and removing a shackle on one end side of the existing rope from the rope fastening beam, Attaching the shackle on one end side of the main rope to the bracing beam, and attaching the temporary rope clasp plate to the upper side of the brazing beam of the new main rope shackle attached to the tufting beam. The step of attaching the shackle of the existing main rope removed from the retaining beam to the temporary rope stop plate, the lifting of the cage by the lifting tool, and the suspension plate of the existing main rope and the temporary rope stop The part between the boards Generating tension, removing the suspension plate and lifting tool, driving the driving sheave and moving the car to the top floor or near the top floor, and supporting the counterweight in the pit, A step of preventing the counterweight from descending, and a suspension plate is attached to the new main rope at the upper part of the cage, and the suspension plate is lifted from the hoistway using a lifting tool to A step of generating a tension in a portion between the suspension plate and the bracing beam, cutting an upper side of the cage of the existing main rope, and cutting an anti-temporary rope fastening plate side of the existing main rope. Connecting the end and the other end of the new main rope, and removing the other end of the existing main rope from the counterweight and pulling the existing main rope to connect the other end of the new main rope. The balance The step of pulling to the side of the cable, the connection between the cut end of the existing main rope and the other end of the new main rope is released, and after attaching the shackle to the other end of the new main rope, the shackle is The step of attaching to the counterweight and the lifting of the lifting plate by the lifting tool are released, the lifting plate and the lifting tool are removed, and then the driving sheave is driven to move the car to the lowest floor or near the lowest floor. And a step of removing the uncut portion of the temporary rope stop plate and the existing main rope.

  According to this invention, the shackle on the one end side of the newly installed main rope is attached to the leash retaining beam, and the temporary leash retaining plate is attached to the upper side of the leash retaining beam of the new main rope shackle. With the shackle at one end attached to the temporary rope stop plate, move the car to the top floor or near the top floor, attach the suspension board to the new main rope at the top of the car, and attach the suspension board to the hoistway The tension is generated at the part between the suspension board of the new main rope and the rope. Therefore, even if the slack type emergency stop device is installed in the lower part of the car, the operation of the slack type emergency stop device in the subsequent process can be avoided. Therefore, even when applied to an elevator equipped with a slack type emergency stop device, the operation of the slack type emergency stop device of the car moved to the upper part of the hoistway can be avoided and the main rope can be easily replaced.

  1 to 3 are process diagrams schematically illustrating a main rope replacement method for a traction type and lower suspension type elevator according to one embodiment of the present invention, and FIG. 4 is a traction according to one embodiment of the present invention. FIG. 5 is a perspective view for explaining a mounting state of a suspension plate in a main rope replacement method for a main suspension system and a lower suspension system elevator, and FIG. 5 is applied to a main rope replacement method for a traction system and a lower suspension system elevator according to an embodiment of the present invention. FIG. 6 is an enlarged perspective view of a main part for explaining a temporarily fixed state of a newly installed main rope in a main rope replacement method for a traction type and lower suspension type elevator according to an embodiment of the present invention. FIG.

  In FIG. 1, in this elevator, a driving sheave 3 is installed in a pit 2 of a hoistway 1, and a car-side return wheel 4 and a weight-side return wheel 5 are installed in the upper part of the hoistway 1. The main rope 6 is connected to the car 7 at one end and raised to the upper part of the hoistway 1, hung on the car side return wheel 5 and lowered to the pit 2, hung on the driving sheave 3 and the hoistway 1. The other end is connected to the counterweight 8 at the other end. In other words, this elevator drive system is such that the car 7 and the counterweight 8 are connected by the main rope 6 and hung on the drive sheave 3 in a “slip-behind” manner, and the frictional force between the drive sheave 3 and the main rope is applied. This is a 1: 1 roping traction system that uses and drives. Then, the car 7 is guided by a pair of car-side guide rails (not shown) by the drive sheave 3 and is raised and lowered in the hoistway 1, and the counterweight 8 is a pair of weight-side guide rails (not shown). ) And is raised and lowered in the hoistway 1. Here, the number of main ropes 6 is set as appropriate according to the specifications of the elevator, but in the present embodiment, for convenience of explanation, the car 7 is suspended by two main ropes 6. .

Further, shackles 9 are attached to both ends of the main rope 6. The main rope 6 is connected to a car 7 and a counterweight 8 through a shackle 9. At this time, as shown in FIG. 6, the clasp beam 11 is extended from the lower end of the car frame to the back side (reverse entrance side) of the car 7, and the rod portion of the shackle 9 is drilled in the cleat beam 11. It is inserted through a mounting hole (not shown), and is fastened and fixed using a nut 12. Thus, this elevator employs a lower suspension system in which the main rope 6 suspends the lower portion of the car 7. The shackle 9 is integrally formed with the rope socket, and a large diameter portion 10 is formed on the rod portion. And the external thread is cut in the area | region from the large diameter part 10 of a rod part to a front-end | tip.
Further, slack type emergency stop devices 13 are installed on both sides of the lower portion of the car 7, respectively, and the car 7 guide rails (not shown) are gripped during operation to prevent the car 7 from falling. This slack type emergency stop device 13 uses slack rope safety, for example, and operates by detecting looseness of the main rope 6. The operation of the slack type emergency stop device 13 is released by applying tension to the main rope 6.

As shown in FIG. 4, the suspension plate 14 has a steel plate rectangular plate base plate 15 having a chain block mounting hole 16 drilled at the center of each side, and two rope gripping grooves 17a on the surface. The rope grip groove 17a is fixed to one surface of the base plate 15 so as to be positioned between the chain block mounting holes 16 with the groove direction of the rope gripping grooves 17a being parallel to the line connecting the hole centers of both chain block mounting holes 16. A steel-made fixed-side rope hoe 17 and two rope-gripping grooves 18a are formed in parallel to each other on the back surface, and the steel-made rope-side hoe 17 is attached to the fixed-side rope hoe 17 so that the rope-gripping grooves 18a face the rope-gripping grooves 17a, respectively. The movable side rope hoe 18 and a steel bolt 19 that fastens and fixes the movable side rope hoe 18 to the fixed side rope hoe 17 are provided. Here, the number of the rope gripping grooves 17a and 18a is two, but when the number of the main ropes 6 on which the car 7 is suspended is three, the number of the rope gripping grooves 17a and 18a is three. . That is, the number of the rope gripping grooves 17 a and 18 a is the same as the number of the main ropes 6 on which the car 7 is suspended.
The suspension plate 14 is attached so that the main rope 6 can be accommodated in the rope gripping groove 17 a and the movable side rope louver 18 is fastened and fixed to the fixed side rope louver 17 by the bolt 19. Thereby, each main rope 6 is located in each pair of rope gripping grooves 17a and 18a, and is pressure-clamped by the fixed side and movable side rope queriers 17 and 18.

  As shown in FIG. 5, the temporary rope stopping plate 20 is produced by bending a steel material into an L shape, and four kerfs 21 are formed at equal intervals on the bent side. The groove width of the cut groove 21 is slightly larger than the diameter of the rod portion of the shackle 9. The groove width of the kerf 21 is smaller than the width of the large-diameter portion 10 of the shackle 9. Here, the number of the cut grooves 21 is four, but when the number of the main ropes 6 on which the car 7 is suspended is three, the number of the cut grooves 21 is six. That is, the number of kerfs 21 is twice the number of main ropes 6 on which the car 7 is suspended.

Next, a method for replacing the main rope according to the present invention will be described with reference to FIGS. Here, for convenience of explanation, the existing main rope is indicated by a solid line with a symbol 6a, and the new main rope is indicated by a one-dot chain line with a symbol 6b.
First, the car 7 is stopped at the lowest floor or near the lowest floor. Then, the worker climbs on the car 7 and attaches the suspension plate 14 to the two existing main ropes 6a. At this time, the two existing main ropes 6a are accommodated in the two pairs of rope gripping grooves 17a and 18a, and are pressed and clamped by the fixed side and movable side rope quarriers 17 and 18. Then, one end of the chain block 22 as a lifting tool is connected to the chain block mounting hole 16 of the hanging plate 14, and the other end is connected to the car 7 to attach the chain block 22 as a lifting tool. This state is shown in FIG.

  Next, as shown in FIG. 1B, the car 7 is lifted by the chain block 22, and a slack is generated at the site of the existing main rope 6 a between the rope clamp beam 11 and the suspension plate 14. At this time, the slack type emergency stop device 13 is activated by detecting the slack of the main rope 6a, and the car 7 is prevented from falling. Therefore, the slack in the portion of the existing main rope 6a between the bracing beam 11 and the suspension plate 14 occurs when the counterweight 8 rises and the existing main rope 6a moves to the brazing beam 11 side.

  Next, the operator raises the two newly installed main ropes 6 b onto the car 7 and lowers one end thereof into the pit 2. An operator in the pit 2 removes the nut 12 and removes the shackles 9 of the two existing main ropes 6a from the ropes 11. Then, the shackle 9 attached to one end of the two newly dropped main ropes 6 b is fastened and fixed to the rope tie beam 11 by the nut 12. Thereafter, the temporary rope stopper plate 20 is set so that the shackles 9 of the two newly installed main ropes 6b enter the respective cut grooves 21, the nut 12 is fastened, and the temporary rope stopper plate 20 is attached. At this time, the temporary rope stop plate 20 is fixed to the large diameter portion 10 of the shackle 9 by fastening the nut 12. Further, the removed shackles 9 of the two existing main ropes 6 a are put into the respective cut grooves 21, fastened and fixed by a pair of nuts 12, and attached to the temporary rope stopping plate 20. This state is shown in FIG. 1 (c) and FIG.

Next, when the operator on the car 7 stops lifting the car 7 by the chain block 22, the counterweight 8 descends and the existing main rope 6a moves to the counterweight 8 side. Thereby, tension is applied to the existing main rope 6a, and the operation of the slack type emergency stop device 13 is released. Then, the suspension plate 14 and the chain block 22 are removed.
Next, as shown in FIG. 1 (d), the driving sheave 3 is driven, and the car 7 is moved to the top floor or near the top floor and stopped.

Next, an operator in the pit 2 supports the counterweight 8 with the pipe support 24. Then, the worker climbs on the car 7 and attaches the suspension plate 14 to the two newly installed main ropes 6b. After that, one end of the chain block 22 is connected to a return beam (not shown) at the top of the hoistway 1, and the other end is connected to the chain block mounting hole 16 of the suspension plate 14 to attach the chain block 22. This state is shown in FIG.
Next, the suspension plate 14 is lifted by the chain block 22, and a tension is generated at the site of the newly installed main rope 6 b between the rope holding beam 11 and the suspension plate 14. Then, the existing main rope 6a is cut | disconnected between the cage | basket | car side return wheel 4 and the tie-down beam 11 (temporary tie-down board 20). At this time, the slack type emergency stop device 13 is not in an operating state because the newly installed main rope 6b is under tension. Then, the cutting ends of the two existing main ropes 6a hanging from the car-side return wheel 4 and the other ends of the two new main ropes 6b placed on the car 7 are respectively connected to the old and new rope connection treatments. Connect with the tool 23. This state is shown in FIG.

Next, the operator in the pit 2 removes the shackle (not shown) attached to the other end of the existing main rope 6 a from the counterweight 8. Then, the existing main rope 6 a is pulled into the pit 2. As a result, the newly installed main rope 6 b is drawn out from the top of the car 7 and moves to the counterweight 8 side through the car-side return wheel 4, the drive sheave 3, and the weight-side return wheel 5. This state is shown in FIG.
Next, when the other end of the new main rope 6b reaches the counterweight 8, the old and new rope connecting jig 23 is removed and a shackle (not shown) is attached. Then, the shackle is balanced and connected to the weight 8. This state is shown in FIG.

Then, when the operator on the car 7 stops lifting the suspension plate 14 by the chain block 22, the car 7 is slightly lowered, and the counterweight 5 from the counterweight 8, the driving sheave 3, the car-side return 4 And tension | tensile_strength generate | occur | produces in the site | part of the newly installed main rope 6b of the area | region leading to the suspension board 14. FIG. Then, the suspension plate 14 and the chain block 22 are removed. Further, the pipe support 24 is removed. Thereafter, as shown in FIG. 3A, the driving sheave 3 is driven, and the car 7 is lowered to the lowest floor or near the lowest floor.
Next, the operator removes the nut 12 in the pit 2 and removes the shackles 9 of the two existing main ropes 6 a from the temporary rope stop plate 20. Further, the nut 12 is removed, the temporary rope stopping plate 20 is removed from the two newly installed main ropes 6b, and the replacement work of the main rope 6 is completed. As a result, as shown in FIG. 3B, an elevator in which the existing main rope 6a is replaced with a new main rope 6b is obtained.

In this embodiment, the shackle 9 on one end side of the newly installed main rope 6b is attached to the rope retaining beam 11, the temporary rope stopping plate 20 is attached to the upper side of the rope retaining beam 11 of the shackle 9 of the newly installed main rope 6b, With the shackle 9 on one end side of the existing main rope 6a attached to the temporary rope stop plate 20, the car 7 is moved to the top floor or near the top floor. Then, the suspension plate 14 is attached to the new main rope 6b at the upper part of the car 7, the suspension plate 14 is returned to the vehicle beam using the chain block 22, and the suspension plate 14 and the rope of the new main rope 6b are lifted. Tension is generated at a portion between the retaining beam 11 and the beam. Thereby, the action | operation of the slack type | formula emergency stop apparatus 13 is avoided.
Further, the car 7 is supported on the return beam via the newly installed main rope 6b, and the existing main rope 6a can be cut off on the side of the temporary rope stop plate 20. Therefore, the main rope that connects the cut end of the existing main rope 6a and the other end of the new main rope 6b and reaches the counterweight 8 through the car side return wheel 4, the drive sheave 3, and the weight side return wheel 5. By pulling the existing main rope 6a laid on the laying route 6 to the counterweight 8 side, the new main rope 6b is passed through the car-side return wheel 4, the drive sheave 3, and the weight-side return wheel 5. It is simply laid on the laying route of the main rope 6 leading to the counterweight 8.
Furthermore, after attaching the shackle 9 to the other end of the newly installed main rope 6b and attaching it to the counterweight 8, the lifting of the suspension plate 14 by the chain block 22 is released. That is, the chain block 22 is gradually loosened and the suspension plate 14 is gradually lowered. As a result, tension is generated in the entire new main rope 6b extending from the counterweight 8 to the brazing beam 11 without loosing the tension between the suspension plate 14 of the new main rope 6b and the brazing beam 11. Therefore, the operation of the slack type emergency stop device 13 can be avoided and the car 7 can be lowered to the pit 2 side.
As described above, according to this embodiment, it is possible to easily replace the existing main rope 6a with the new main rope 6b while avoiding the operation of the slack type emergency stop device.

  Further, since the chain block mounting holes 16 are formed on both sides of the fixed side rope quay 17 of the base plate 15 of the suspension plate 14, the suspension plate 14 can be attached to the existing main rope without considering the position of the chain block attachment hole 16. 6a or a new main rope 6b. Therefore, the workability of attaching the suspension plate 14 on the car 7 is improved.

In the above embodiment, the driving sheave 3 is described as being applied to a 1: 1 roping traction type and lower suspension type elevator installed in the pit 2, but the main rope replacement method is as follows. The same effect can be obtained even when the drive sheave 3 is applied to a 1: 1 roping traction type and lower suspension type elevator installed in the upper part of the hoistway 1.
Moreover, in the said embodiment, although it shall apply to the elevator equipped with the slack type | formula emergency stop apparatus 13, the replacement method of this main rope is equipped with the emergency stop apparatus which operate | moves in conjunction with a governor. Needless to say, the present invention may be applied to elevators.

In the above embodiment, the car 7 is moved to the top floor or near the top floor and stopped, and then one end of the chain block 22 is connected to the return beam on the top of the hoistway 1. One end of the block 22 may be connected to the upper part of the hoistway 1 without being limited to the return wheel. That is, the car 7 only needs to be supported by the hoistway 1 via the newly installed main rope 6b.
Moreover, in the said embodiment, although the two chain block attachment holes 16 are drilled in the base plate 15 of the suspension board 14, at least one chain block attachment hole 16 should just be formed.
Moreover, in the said embodiment, although the chain block attachment hole 16 as a lifting tool attachment part shall be formed in the base board 15, the shape of the lifting tool attachment part is not limited to a hole. A J-shaped hook may be used.

It is process drawing which illustrates typically the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention. It is process drawing which illustrates typically the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention. It is process drawing which illustrates typically the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention. It is a perspective view explaining the attachment state of the suspension board in the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention. It is a perspective view which shows the temporary rope stop board applied to the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention. It is a principal part expansion perspective view explaining the temporary fix | stop state of the newly installed main rope in the main rope replacement | exchange method of the traction system and lower suspension system elevator which concerns on one embodiment of this invention.

Explanation of symbols

  1 hoistway, 2 pits, 3 drive sheaves, 6 main ropes, 6a existing main ropes, 6b new main ropes, 7 cages, 8 counterweights, 9 shackles, 11 ropes, 13 slack type emergency stop devices, 14 Suspension plate, 20 Temporary rope stop plate, 22 Chain block (lifting tool), 23 New and old rope connection jig, 24 Pipe support.

Claims (3)

The main rope is attached to a rope that is attached at one end to the lower part of the car, the other end is attached to a counterweight, and is driven by a driving sheave. A rope replacement method,
The above-mentioned car is stopped at the lowermost floor or in the vicinity of the lowermost floor, a suspension plate is attached to the upper side of the existing main rope, and the cage is lifted from the suspension plate using a lifting tool. Generating a slack in a portion between the suspension plate of the main rope and the rope fastening beam;
After removing the shackle on one end side of the existing main rope from the leash retaining beam, attaching the shackle on one end side of the new main rope to the leash retaining beam;
After attaching the temporary rope retaining plate to the upper side of the new main rope shackle attached to the rope, the existing main rope shackle removed from the rope Attaching to the temporary rope stop plate,
Release the lifting of the car by the lifting tool to generate a tension at the site between the lifting plate and the temporary rope stopping plate of the existing main rope, and after removing the lifting plate and the lifting tool, Driving the driving sheave to move the car to the top floor or near the top floor and stop,
Supporting the counterweight in the pit and preventing the counterweight from descending;
At the upper part of the cage, a suspension plate is attached to the new main rope, and the suspension plate is lifted with respect to the hoistway using a lifting tool, and between the suspension plate of the new main rope and the rope A step of generating tension in the part of
Cutting the upper side of the cage of the existing main rope, and connecting the cut end of the existing main rope on the anti-temporary rope stopping plate side and the other end of the new main rope;
Removing the other end of the existing main rope from the counterweight, pulling the existing main rope and pulling the other end of the new main rope toward the counterweight; and
Releasing the connection between the cut end of the existing main rope and the other end of the new main rope, attaching a shackle to the other end of the new main rope, and then attaching the shackle to the counterweight;
Releasing the lifting of the suspension plate by the lifting tool, removing the suspension plate and the lifting tool, and then driving the driving sheave to move the car to the lowermost floor or near the lowermost floor to stop it; ,
A step of removing the cutting rest of the temporary rope stop plate and the existing main rope;
A method for replacing a main rope of a traction type and lower suspension type elevator characterized by comprising:   2. A method of replacing a main rope of a traction type and lower suspension type elevator according to claim 1, wherein a slack type emergency stop device is installed at a lower portion of the car. A suspension plate for use in the method of replacing the main rope of the traction type and lower suspension type elevator according to claim 1 or 2,
A base plate provided with a lifting tool attachment;
A fixed rope quay provided integrally with the base plate and having a fixed rope holding groove formed on the surface;
A movable rope gripper attached to the fixed rope rope so that the movable rope gripping groove is formed on the back surface, and the movable rope gripping groove faces the fixed rope gripping groove;
A suspension plate comprising: a fastening member that fastens the movable rope quay to the fixed rope querier and pressurizes and holds the main rope by the fixed and movable rope gripping grooves.

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