EP1591406B1 - Method and apparatus for changing the rope of a traction sheave elevator - Google Patents
Method and apparatus for changing the rope of a traction sheave elevator Download PDFInfo
- Publication number
- EP1591406B1 EP1591406B1 EP05396015A EP05396015A EP1591406B1 EP 1591406 B1 EP1591406 B1 EP 1591406B1 EP 05396015 A EP05396015 A EP 05396015A EP 05396015 A EP05396015 A EP 05396015A EP 1591406 B1 EP1591406 B1 EP 1591406B1
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- EP
- European Patent Office
- Prior art keywords
- rope
- old
- traction sheave
- new
- elevator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B19/00—Mining-hoist operation
- B66B19/02—Installing or exchanging ropes or cables
Definitions
- the present invention relates to a method as defined in the preamble of claim 1. Furthermore, the invention relates to an apparatus as defined in the preamble of claim 14.
- Publication JP 2001 287877 A represents a main rope replacement method and device.
- Said device comprises a rope connector for connecting one end of a new main rope to one end of an existing main rope, a pulling means for successively pulling the existing main rope having the new main rope connected thereto from the other end side, and fitting bodies and guide bodies interposed between a sheave and the main ropes to reduce the friction force generated in the movement of the main ropes.
- the existing main rope is pulled by the pulling means, whereby the new main rope connected to the existing main rope through the rope connector is successively laid.
- the object of the invention is to overcome the above-mentioned drawbacks.
- a specific object of the invention is to disclose a method and an apparatus that will accelerate the rope change operation, reduce the need for labor, reduce the costs and improve work safety.
- the method of the invention is characterized by what is disclosed in the characterization part of claim 1. Further, the apparatus of the invention is characterized by what is disclosed in the characterization part of claim 14. Other embodiments of the invention are characterized by what is disclosed in the other claims. Inventive embodiments are also presented in the description part and drawings of the present application. Within the framework of the basic concept of the invention, features of different embodiments of the invention can be applied in conjunction with other embodiments.
- the new rope is fastened as an extension to the old rope threaded over the diverting pulleys and traction sheave, and the new rope is pulled by means of the old rope into the place of the old rope.
- the apparatus comprises relief devices to be mounted on the rim of the traction sheave to keep the rope clear of contact with the rope groove of the traction sheave. Further, the apparatus comprises a joining element for end-to-end joining of the old rope and the new rope to each other. Moreover, the apparatus comprises a rope pulling device for pulling the ropes.
- the invention has the advantage that the method and apparatus eliminate, at least to a large extent, the need for manual handling of the old rope, thus reducing the need for muscular power and the risk of accident.
- it is not necessary to have an installer at each diverting pulley to ensure proper passage of the rope, which further reduces the required muscular power and manpower as well as the risk of accident.
- the need for breaks in the work is reduced.
- the overall time required for the rope change is reduced to about half the time that used to be needed for changing the rope by traditional methods. Therefore, the method of the invention is very cost-effective.
- step a) when the old rope of a traction sheave elevator is secured by both ends to a fixed overhead structure and passed between the ends over diverting pulleys provided on the elevator car and on a possible counterweight and over a traction sheave driven by a drive apparatus, in step a) the elevator car and possible counterweight are supported on a fixed structure to ease the rope.
- step b) the old rope is taken clear of contact with the rope groove of the traction sheave and continued to be passed over the traction sheave.
- step c) the ends of the old rope are detached from the fixed overhead structure.
- step d) the detached end of the old rope is joined to the end of the new rope in an end-to-end manner.
- step e) the old rope and the new rope connected as an extension to it are pulled so that the old rope and the new rope pass over the diverting pulleys and traction sheave until the new rope is in the place of the old rope.
- step f) the ends of the old rope and new rope connected together are released from each other.
- step g) each end of the new rope is secured to the fixed overhead structure.
- step h) the new rope is brought into tractive contact with the traction sheave.
- step i) the support holding the elevator car and the possible counterweight is removed to allow them to be supported by the new rope.
- step b) relief devices are mounted on the rim of the traction sheave.
- the old rope is raised clear of contact with the rope groove of the traction sheave and brought onto the relief devices to support it.
- step h) and before step i) the relief devices are removed from the rim of the traction sheave and the new rope is lowered into the rope groove of the traction sheave.
- step d) the ends of the old rope and new rope are joined together by means of joining elements.
- step e) a rope pulling device is brought into tractive contact with the old rope at a point near the end of the old rope, and in step e) the ropes are pulled by the rope pulling device.
- step a) the elevator car is driven up to a position close to the upper end of the elevator shaft so that the top of the elevator car is at the level of the topmost landing floor, the counterweight being thus near the lower end of the elevator shaft, and in step a) a support is placed under the counterweight, onto which support the counterweight is lowered, and the elevator car is raised upwards and locked in position so that the rope is slackened.
- a rope reel with a new rope coiled on it is provided.
- the new rope is uncoiled from the rope reel during the change operation.
- the rope reel is placed on the topmost landing floor to allow the new rope to be uncoiled from the rope reel.
- step c) the old rope is severed at a distance from the fixing point where it is fastened to the fixed overhead structure, and the new rope is connected as an extension to the old rope by working on the top of the elevator car.
- the rope pulling device is suspended on a fixed structure in the elevator shaft by working on the top of the elevator car.
- the old rope is passed to the bottom of the elevator shaft, the freely hanging portion of the old rope thus forming a counterweight to the rope being pulled.
- the old rope is gathered into a bundle from the bottom of the elevator shaft after the change.
- the relief device comprises a pair of clamp jaws fitted to be pressed against opposite sides of the traction sheave. Furthermore, the relief device comprises a supporter detachably and adjustably secured to the clamp jaws. The rope separated from the rope groove of the traction sheave can be directed to pass over the supporter. In addition, the relief device comprises a bound guard, which is detachably and adjustably secured to the clamp jaws at a distance slightly larger than the thickness of the joining element from the supporter so that the gap remaining between the supporter and the bound guard is large enough to allow the ropes and the joining element to pass through.
- the joining element has been fitted to move along the rope grooves of the diverting pulleys.
- the joining element is a metal sleeve comprising an interior space fitted to receive the ends of the ropes to be joined inside it.
- the substantially thin wall of the sleeve permits of being constricted with a crimping tool to allow the joining element to be fastened to the ropes to be joined.
- the apparatus comprises a rope reel comprising a first frame and a reel drum mounted with bearings on the first frame so as to be rotatable about a horizontal first axis of rotation, on which reel drum the new rope has been coiled up.
- the rope reel additionally comprises a braking device for braking the rotation of the reel drum.
- the rope pulling device comprises a second frame and a pulley mounted with bearings on the second frame so as to be rotatable about a second axis of rotation.
- the pulley comprises a rope groove of V-shaped cross-section, which has been fitted to receive the rope into it so that the side walls of the rope groove are pressed from opposite sides against the rope.
- a third frame is pivotally connected to the second frame with a joint whose swiveling axis is parallel to the second axis of rotation.
- a press wheel is mounted with bearings on the third frame so as to be rotatable about a third axis of rotation, which is parallel to the second axis of rotation, at a distance from the joint so that the planes of rotation of the press wheel and the pulley are substantially at the same plane.
- a spring has been fitted to act between the second frame and the third frame to press the press wheel towards the pulley so as to exert a wedging action on the rope passed over the pulley to force it into the rope groove.
- Figures 1 - 7 illustrate an elevator with machine below and with a 1:2 suspension ratio.
- the traction sheave 3 together with the drive apparatus 8 driving it is placed in a separate machine room located at the lower end of the elevator shaft 13 sideways from the shaft 13.
- the invention will be described in connection with the elevator of figures 1 - 7 , which, however, is not a limitation of the invention.
- the method of the invention is equally applicable regardless of whether the elevator is an elevator with machine room below or above or an elevator without machine room, in which the elevator drive machine is placed in the elevator shaft. Neither is the invention restricted to any given mode of suspension.
- the invention is advantageously applicable to elevators with a suspension ratio of 1:2, 1:4 and so on, as well as elevators with machine room below and with a 1:1 suspension ratio. Moreover, the invention is also applicable for use in elevators without counterweight. Further, the following presentation describes the operation of changing a single rope, although an elevator usually has 3 - 12 ropes side by side. The ropes a changed one at a time and the same actions are carried out in succession separately for each rope. Within the framework of the basic concept of the invention, it is also possible to change more than one rope at the same time, thereby accelerating the change operation. When all the ropes of the elevator are changed by a single pulling operation, the diverting pulleys can rotate freely and thus do not resist the passage of the ropes.
- the car and counterweight have to be secured to the elevator shaft independently of the elevator ropes, e.g. so that the counterweight is supported by the buffer or by other means from the bottom of the shaft and the car is immovably secured to the guide rails by means of the safety gear or a separate temporary fastening arrangement.
- Fig. 1 is a representation of an elevator wherein the elevator is in normal operating condition and ready for a replacement of the old rope 4.
- the old rope 4 is secured by both ends to a fixed overhead structure 5, which in this case is the ceiling of the elevator shaft 13. Between the fixing points the old rope 4 is passed over diverting pulleys 2 provided on the elevator car 6 and the counterweight 7 and over the traction sheave 3, which is driven by a drive apparatus 8.
- the elevator in Fig. 1 has two diverting pulleys 2 at or above the upper end of the shaft, two diverting pulleys at the lower end of the elevator shaft, two diverting pulleys 2 on the elevator car 6 and one diverting pulley 2 on the counterweight. In the change operation the new rope is to be set running along the same path as the old rope.
- the operation of changing the old rope 4 is started by driving the elevator car up so that the top 14 of the elevator car 6 is substantially at the same level with the topmost landing floor 15.
- a support 16 is placed under the counterweight 7 to support the counterweight 7 so as to hold it in place when the suspending force of the rope 4 is removed.
- the elevator car is lifted upwards a few tens of centimeters, e.g. 30 cm, and the elevator car 6 is locked to its guide rails.
- the old rope 4 has now become slack so that it no longer has the tensile load caused by the counterweight and the elevator car.
- three relief devices 10 are mounted on the rim of the traction sheave 3 to raise the old rope 4 out of contact with the rope groove 9 of the traction sheave 3 so that the old rope 4 can slide over the relief devices 10 during the change operation.
- Relief devices 10 are needed on the traction sheave 3 because the traction sheave 3, unlike the diverting pulleys 2, does not rotate freely in a mobile manner.
- the structure of the relief device 10 is described in detail in connection with the description of figures 8 and 9 .
- a rope pulling device 12 has been suspended on a fixed structure, e.g. an existing beam 43 in the upper part of the of the elevator shaft 13.
- a rope reel 17 has been brought to the topmost landing floor 15.
- the new rope 1 to be mounted in place of the old rope 4 has been coiled up on the reel drum 25 of the rope reel 17.
- the reel drum 25 is mounted with bearings on a first frame 24 so as to be rotatable about a first axis of rotation 26.
- the rope reel 17 is also provided with a braking device 27 to allow braking of the rotation of the reel drum 25.
- both ends of the old rope 4 are detached from the fixed overhead structure 5.
- the old rope 4 is severed at a point such that the joining can be carried out working on the top 14 of the elevator car 6, and the end of the new rope 1 is joined to the end of the old rope 4 by means of a joining element 11.
- the joining element 11 is described in more detail in connection with Fig. 10 and 11 .
- the second end of the old rope 4, which is to be gripped by the rope pulling device 12 to pull the rope combination 1, 4 is taped with duct tape or the like and cut in the part covered by the tape. This end to be pulled at is fed into the rope pulling device 12.
- Fig. 6 presents a situation where the rope pulling device 12 has been operated until the old rope 4 has been pulled out from around all the diverting pulleys 2 and the traction sheave 3 and the new rope 1 is completely threaded in position around them.
- the old rope 4 which remains hanging by the joining element 11 from the end of the new rope 1, has been passed to the bottom of the elevator shaft 13.
- the freely hanging rope portion has acted as a counterweight to the rope pulling operation, relieving the pull.
- the joining element 11 has moved through the rope pulling device 12.
- the rope pulling device 12 is preferably provided with a torque limiter that limits the pulling force so that the rope to be pulled will not lift the counterweight 7 off the support 16, which could lead to a dangerous situation.
- the rope pulling device 12 is stopped.
- the old rope 4 is fastened to the elevator's handrail or to the other ropes and the new rope 1 still connected to it is taped at a point beside the joining element 11 and severed in the taped part by means of a rope cutter.
- the rope pulling device 12 is started again and driven in the opposite direction so that the new rope 1 can be removed from the rope pulling device 12.
- the rope 1 is similarly taped and severed.
- Fig. 7 the ends of the new rope 1 are secured to the fixed overhead structure 5.
- the old rope 4 is lying on the bottom of the elevator shaft 13, from where it can be coiled up onto a rope reel (not shown). The operation of replacing the next old rope 4 can be started and carried out as described above.
- the traction sheave 3 is provided with three relief devices 10 to keep the rope 1 and/or 4 clear of contact with the rope groove 9 of the traction sheave 3.
- the relief device 10 comprises a pair of clamp jaws 18, which have been fitted to be pressed against opposite sides of the traction sheave 3.
- a supporter 19 is detachably and adjustably secured to the clamp jaws 18.
- the rope 1 and/or 4 separated from the rope groove 9 of the traction sheave 3 can be passed over the supporter 19.
- the relief device 10 additionally comprises a bound guard 20, which is detachably and adjustably secured to the clamp jaws 18 at a distance somewhat larger than the thickness of the joining element 11 from the supporter 19 so that the gap 10 remaining between the supporter 19 and the bound guard 20 will allow the ropes 1, 4 and the joining element 11 to pass through.
- the relief device 10 in Fig. 9 supports all the parallel ropes simultaneously.
- the distance between the clamp jaws 18 is adjustable so that the relief device 10 can be fastened to traction sheaves 13 of different widths.
- Fig. 10 and 11 present a joining element 11 for joining an old rope 4 and a new rope 1 together end to end.
- the joining element 11 is designed to dimensions permitting it to move along the rope grooves of the diverting pulleys 2.
- the joining element 11 is a metal sleeve comprising an interior space 22 fitted to receive inside it the ends of the rope 1, 4 to be joined, and it has a substantially thin wall 23 that permits of being constricted by means of a crimping tool to allow the joining element 11 to be fastened to the ropes 1, 4 to be joined.
- the joining sleeve 11 is made e.g. from a steel tube, which has been made thinner by turning or boring so that the wall thickness is about 0.7 - 1.0 mm.
- the length of the joining sleeve 11 is e.g. 65 - 100 mm.
- the joining sleeve 11 is constricted e.g. with cable crimping pliers having hexagonal jaws, in Fig. 10 at the points indicated by arrows so that a joint between the ropes 1 and 4 is obtained that is sufficiently reliable with respect to pull.
- Figures 12 and 13 present a rope pulling device 12 for pulling the ropes 1, 4.
- the rope pulling device 12 comprises a second frame 28.
- a pulley 29 rotated by an electric motor/gear combination is mounted with bearings on the second frame 28 so as to be rotatable about a second axis 30 of rotation.
- the pulley 29 comprises a rope groove 31 of V-shaped cross-section, which has been fitted to receive the rope 1, 4 into it so that the side walls 32 of the rope groove 31 are pressed from opposite sides against the rope.
- a third frame 33 is pivotally connected to the second frame 28 by a joint 34 whose swiveling axis 35 is parallel to the second axis 30 of rotation.
- a press wheel 39 is mounted with bearings on the third frame 33 so as to be rotatable about a third axis 40 of rotation, which is parallel to the second axis 30 of rotation, at a distance from the joint 34 so that the planes of rotation T 1 and T 2 of the press wheel 39 and the pulley 29 are substantially at the same plane.
- a spring 41 has been fitted to act between the second frame 28 and the third frame 33 to press the press wheel 39 towards the pulley 29 so that the press wheel exerts a wedging action on the rope to force it deeper into the rope groove 31 to achieve a stronger frictional force.
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
Description
- The present invention relates to a method as defined in the preamble of
claim 1. Furthermore, the invention relates to an apparatus as defined in the preamble ofclaim 14. - In prior art, a method for changing the ropes of a traction sheave elevator is known whereby both ends of the old rope are released from their fastenings and the old rope is removed manually. After the old rope has been removed, a new rope is threaded into position over the traction sheave and diverting pulleys provided on the elevator car and possibly on the counterweight and fixed structures. As the method is implemented as manual work, it requires plenty of muscular power and manpower. Each diverting pulley at which the direction of the rope changes has to be attended to by an installer taking care that the rope runs properly. This work has traditionally been performed by installers standing on separately built scaffolds or on ladders, which is a hazardous solution. In addition, the rope change operation, which is carried out by muscular power, is very heavy and accident-prone and requires many breaks in the work. Thus, the overall time required to change the rope becomes long. Manual handling of an old rope that has sharp broken strands sticking out easily leads to accidents.
- In publication
JP 2003 089486 A - Publication
JP 2001 287877 A - The object of the invention is to overcome the above-mentioned drawbacks.
- A specific object of the invention is to disclose a method and an apparatus that will accelerate the rope change operation, reduce the need for labor, reduce the costs and improve work safety.
- The method of the invention is characterized by what is disclosed in the characterization part of
claim 1. Further, the apparatus of the invention is characterized by what is disclosed in the characterization part ofclaim 14. Other embodiments of the invention are characterized by what is disclosed in the other claims. Inventive embodiments are also presented in the description part and drawings of the present application. Within the framework of the basic concept of the invention, features of different embodiments of the invention can be applied in conjunction with other embodiments. - According to the method of the invention, the new rope is fastened as an extension to the old rope threaded over the diverting pulleys and traction sheave, and the new rope is pulled by means of the old rope into the place of the old rope.
- According to the invention, the apparatus comprises relief devices to be mounted on the rim of the traction sheave to keep the rope clear of contact with the rope groove of the traction sheave. Further, the apparatus comprises a joining element for end-to-end joining of the old rope and the new rope to each other. Moreover, the apparatus comprises a rope pulling device for pulling the ropes.
- The invention has the advantage that the method and apparatus eliminate, at least to a large extent, the need for manual handling of the old rope, thus reducing the need for muscular power and the risk of accident. In addition, it is not necessary to have an installer at each diverting pulley to ensure proper passage of the rope, which further reduces the required muscular power and manpower as well as the risk of accident. The need for breaks in the work is reduced. The overall time required for the rope change is reduced to about half the time that used to be needed for changing the rope by traditional methods. Therefore, the method of the invention is very cost-effective.
- In an embodiment of the method, when the old rope of a traction sheave elevator is secured by both ends to a fixed overhead structure and passed between the ends over diverting pulleys provided on the elevator car and on a possible counterweight and over a traction sheave driven by a drive apparatus, in step a) the elevator car and possible counterweight are supported on a fixed structure to ease the rope. In step b) the old rope is taken clear of contact with the rope groove of the traction sheave and continued to be passed over the traction sheave. In step c) the ends of the old rope are detached from the fixed overhead structure. In step d) the detached end of the old rope is joined to the end of the new rope in an end-to-end manner. In step e) the old rope and the new rope connected as an extension to it are pulled so that the old rope and the new rope pass over the diverting pulleys and traction sheave until the new rope is in the place of the old rope. In step f) the ends of the old rope and new rope connected together are released from each other. In step g) each end of the new rope is secured to the fixed overhead structure. In step h) the new rope is brought into tractive contact with the traction sheave. In step i) the support holding the elevator car and the possible counterweight is removed to allow them to be supported by the new rope.
- In an embodiment of the method, in step b) relief devices are mounted on the rim of the traction sheave. The old rope is raised clear of contact with the rope groove of the traction sheave and brought onto the relief devices to support it.
- In an embodiment of the method, after step h) and before step i) the relief devices are removed from the rim of the traction sheave and the new rope is lowered into the rope groove of the traction sheave.
- In an embodiment of the method, in step d) the ends of the old rope and new rope are joined together by means of joining elements.
- In an embodiment of the method, before step e) a rope pulling device is brought into tractive contact with the old rope at a point near the end of the old rope, and in step e) the ropes are pulled by the rope pulling device.
- In an embodiment of the method, before step a) the elevator car is driven up to a position close to the upper end of the elevator shaft so that the top of the elevator car is at the level of the topmost landing floor, the counterweight being thus near the lower end of the elevator shaft, and in step a) a support is placed under the counterweight, onto which support the counterweight is lowered, and the elevator car is raised upwards and locked in position so that the rope is slackened.
- In an embodiment of the method, a rope reel with a new rope coiled on it is provided. The new rope is uncoiled from the rope reel during the change operation.
- In an embodiment of the method, the rope reel is placed on the topmost landing floor to allow the new rope to be uncoiled from the rope reel.
- In an embodiment of the method, in step c) the old rope is severed at a distance from the fixing point where it is fastened to the fixed overhead structure, and the new rope is connected as an extension to the old rope by working on the top of the elevator car.
- In an embodiment of the method, the rope pulling device is suspended on a fixed structure in the elevator shaft by working on the top of the elevator car.
- In an embodiment of the method, during the change operation the old rope is passed to the bottom of the elevator shaft, the freely hanging portion of the old rope thus forming a counterweight to the rope being pulled.
- In an embodiment of the method, the old rope is gathered into a bundle from the bottom of the elevator shaft after the change.
- In an embodiment of the apparatus, the relief device comprises a pair of clamp jaws fitted to be pressed against opposite sides of the traction sheave. Furthermore, the relief device comprises a supporter detachably and adjustably secured to the clamp jaws. The rope separated from the rope groove of the traction sheave can be directed to pass over the supporter. In addition, the relief device comprises a bound guard, which is detachably and adjustably secured to the clamp jaws at a distance slightly larger than the thickness of the joining element from the supporter so that the gap remaining between the supporter and the bound guard is large enough to allow the ropes and the joining element to pass through.
- In an embodiment of the apparatus, the joining element has been fitted to move along the rope grooves of the diverting pulleys.
- In an embodiment of the apparatus, the joining element is a metal sleeve comprising an interior space fitted to receive the ends of the ropes to be joined inside it. The substantially thin wall of the sleeve permits of being constricted with a crimping tool to allow the joining element to be fastened to the ropes to be joined.
- In an embodiment of the apparatus, the apparatus comprises a rope reel comprising a first frame and a reel drum mounted with bearings on the first frame so as to be rotatable about a horizontal first axis of rotation, on which reel drum the new rope has been coiled up. The rope reel additionally comprises a braking device for braking the rotation of the reel drum.
- In an embodiment of the apparatus, the rope pulling device comprises a second frame and a pulley mounted with bearings on the second frame so as to be rotatable about a second axis of rotation. The pulley comprises a rope groove of V-shaped cross-section, which has been fitted to receive the rope into it so that the side walls of the rope groove are pressed from opposite sides against the rope. A third frame is pivotally connected to the second frame with a joint whose swiveling axis is parallel to the second axis of rotation. A press wheel is mounted with bearings on the third frame so as to be rotatable about a third axis of rotation, which is parallel to the second axis of rotation, at a distance from the joint so that the planes of rotation of the press wheel and the pulley are substantially at the same plane. A spring has been fitted to act between the second frame and the third frame to press the press wheel towards the pulley so as to exert a wedging action on the rope passed over the pulley to force it into the rope groove.
- In the following, the invention will be described in detail with reference to embodiment examples and the attached drawing, wherein
-
Fig. 1 is a diagrammatic representation of a traction sheave elevator with machine room below, -
Fig. 2 - 7 present the elevator ofFig. 1 at different stages of the method of the invention for changing the rope, -
Fig. 8 presents a side view of a traction sheave provided with relief devices according to an embodiment of the apparatus of the invention, -
Fig. 9 presents a cross-section IX-IX fromFig. 8 , -
Fig. 10 presents a longitudinal section of a joining element according to an embodiment of the apparatus of the invention for joining the new and old ropes together, -
Fig. 11 presents a cross-section XI-XI fromFig. 10 , -
Fig. 12 presents a skeleton diagram of a rope pulling device according to an embodiment of the apparatus of the invention in side view, and -
Fig. 13 presents a cross-section XIII-XIII fromFig. 12 . - As an example of a traction sheave elevator,
Figures 1 - 7 illustrate an elevator with machine below and with a 1:2 suspension ratio. Thetraction sheave 3 together with thedrive apparatus 8 driving it is placed in a separate machine room located at the lower end of theelevator shaft 13 sideways from theshaft 13. In the following description of the method and apparatus, the invention will be described in connection with the elevator offigures 1 - 7 , which, however, is not a limitation of the invention. The method of the invention is equally applicable regardless of whether the elevator is an elevator with machine room below or above or an elevator without machine room, in which the elevator drive machine is placed in the elevator shaft. Neither is the invention restricted to any given mode of suspension. Thus, the invention is advantageously applicable to elevators with a suspension ratio of 1:2, 1:4 and so on, as well as elevators with machine room below and with a 1:1 suspension ratio. Moreover, the invention is also applicable for use in elevators without counterweight. Further, the following presentation describes the operation of changing a single rope, although an elevator usually has 3 - 12 ropes side by side. The ropes a changed one at a time and the same actions are carried out in succession separately for each rope. Within the framework of the basic concept of the invention, it is also possible to change more than one rope at the same time, thereby accelerating the change operation. When all the ropes of the elevator are changed by a single pulling operation, the diverting pulleys can rotate freely and thus do not resist the passage of the ropes. In this case the car and counterweight have to be secured to the elevator shaft independently of the elevator ropes, e.g. so that the counterweight is supported by the buffer or by other means from the bottom of the shaft and the car is immovably secured to the guide rails by means of the safety gear or a separate temporary fastening arrangement. -
Fig. 1 is a representation of an elevator wherein the elevator is in normal operating condition and ready for a replacement of theold rope 4. Theold rope 4 is secured by both ends to a fixedoverhead structure 5, which in this case is the ceiling of theelevator shaft 13. Between the fixing points theold rope 4 is passed over divertingpulleys 2 provided on theelevator car 6 and thecounterweight 7 and over thetraction sheave 3, which is driven by adrive apparatus 8. The elevator inFig. 1 has two divertingpulleys 2 at or above the upper end of the shaft, two diverting pulleys at the lower end of the elevator shaft, two divertingpulleys 2 on theelevator car 6 and one divertingpulley 2 on the counterweight. In the change operation the new rope is to be set running along the same path as the old rope. - Referring further to
Fig. 1 , the operation of changing theold rope 4 is started by driving the elevator car up so that the top 14 of theelevator car 6 is substantially at the same level with thetopmost landing floor 15. - As shown in
Fig. 2 , asupport 16 is placed under thecounterweight 7 to support thecounterweight 7 so as to hold it in place when the suspending force of therope 4 is removed. Using a block-and-tackle or someother hoisting device 42, the elevator car is lifted upwards a few tens of centimeters, e.g. 30 cm, and theelevator car 6 is locked to its guide rails. Theold rope 4 has now become slack so that it no longer has the tensile load caused by the counterweight and the elevator car. - As shown in
Fig. 3 , threerelief devices 10 are mounted on the rim of thetraction sheave 3 to raise theold rope 4 out of contact with therope groove 9 of thetraction sheave 3 so that theold rope 4 can slide over therelief devices 10 during the change operation.Relief devices 10 are needed on thetraction sheave 3 because thetraction sheave 3, unlike the divertingpulleys 2, does not rotate freely in a mobile manner. The structure of therelief device 10 is described in detail in connection with the description offigures 8 and 9 . - In
Fig. 4 we can see that, working from the top 14 of theelevator car 6, arope pulling device 12 has been suspended on a fixed structure, e.g. an existingbeam 43 in the upper part of the of theelevator shaft 13. Arope reel 17 has been brought to thetopmost landing floor 15. Thenew rope 1 to be mounted in place of theold rope 4 has been coiled up on thereel drum 25 of therope reel 17. Thereel drum 25 is mounted with bearings on a first frame 24 so as to be rotatable about a first axis ofrotation 26. Therope reel 17 is also provided with abraking device 27 to allow braking of the rotation of thereel drum 25. - In
Fig. 5 , both ends of theold rope 4 are detached from the fixedoverhead structure 5. Theold rope 4 is severed at a point such that the joining can be carried out working on the top 14 of theelevator car 6, and the end of thenew rope 1 is joined to the end of theold rope 4 by means of a joiningelement 11. The joiningelement 11 is described in more detail in connection withFig. 10 and 11 . The second end of theold rope 4, which is to be gripped by therope pulling device 12 to pull therope combination rope pulling device 12. -
Fig. 6 presents a situation where therope pulling device 12 has been operated until theold rope 4 has been pulled out from around all the divertingpulleys 2 and thetraction sheave 3 and thenew rope 1 is completely threaded in position around them. Theold rope 4, which remains hanging by the joiningelement 11 from the end of thenew rope 1, has been passed to the bottom of theelevator shaft 13. The freely hanging rope portion has acted as a counterweight to the rope pulling operation, relieving the pull. The joiningelement 11 has moved through therope pulling device 12. - The
rope pulling device 12 is preferably provided with a torque limiter that limits the pulling force so that the rope to be pulled will not lift thecounterweight 7 off thesupport 16, which could lead to a dangerous situation. - Once the joining
element 11 has passed through therope pulling device 12 as shown inFig. 6 , therope pulling device 12 is stopped. Theold rope 4 is fastened to the elevator's handrail or to the other ropes and thenew rope 1 still connected to it is taped at a point beside the joiningelement 11 and severed in the taped part by means of a rope cutter. After this therope pulling device 12 is started again and driven in the opposite direction so that thenew rope 1 can be removed from therope pulling device 12. At therope reel 17 end, therope 1 is similarly taped and severed. - In
Fig. 7 , the ends of thenew rope 1 are secured to the fixedoverhead structure 5. Theold rope 4 is lying on the bottom of theelevator shaft 13, from where it can be coiled up onto a rope reel (not shown). The operation of replacing the nextold rope 4 can be started and carried out as described above. - In
Fig. 8 , thetraction sheave 3 is provided with threerelief devices 10 to keep therope 1 and/or 4 clear of contact with therope groove 9 of thetraction sheave 3. - As is also shown in
Fig. 9 , therelief device 10 comprises a pair ofclamp jaws 18, which have been fitted to be pressed against opposite sides of thetraction sheave 3. Asupporter 19 is detachably and adjustably secured to theclamp jaws 18. Therope 1 and/or 4 separated from therope groove 9 of thetraction sheave 3 can be passed over thesupporter 19. Therelief device 10 additionally comprises a boundguard 20, which is detachably and adjustably secured to theclamp jaws 18 at a distance somewhat larger than the thickness of the joiningelement 11 from thesupporter 19 so that thegap 10 remaining between thesupporter 19 and the boundguard 20 will allow theropes element 11 to pass through. Therelief device 10 inFig. 9 supports all the parallel ropes simultaneously. The distance between theclamp jaws 18 is adjustable so that therelief device 10 can be fastened to traction sheaves 13 of different widths. -
Fig. 10 and 11 present a joiningelement 11 for joining anold rope 4 and anew rope 1 together end to end. - The joining
element 11 is designed to dimensions permitting it to move along the rope grooves of the divertingpulleys 2. The joiningelement 11 is a metal sleeve comprising aninterior space 22 fitted to receive inside it the ends of therope thin wall 23 that permits of being constricted by means of a crimping tool to allow the joiningelement 11 to be fastened to theropes sleeve 11 is made e.g. from a steel tube, which has been made thinner by turning or boring so that the wall thickness is about 0.7 - 1.0 mm. The length of the joiningsleeve 11 is e.g. 65 - 100 mm. The joiningsleeve 11 is constricted e.g. with cable crimping pliers having hexagonal jaws, inFig. 10 at the points indicated by arrows so that a joint between theropes -
Figures 12 and 13 present arope pulling device 12 for pulling theropes rope pulling device 12 comprises asecond frame 28. Apulley 29 rotated by an electric motor/gear combination is mounted with bearings on thesecond frame 28 so as to be rotatable about asecond axis 30 of rotation. As shown inFig. 13 , thepulley 29 comprises arope groove 31 of V-shaped cross-section, which has been fitted to receive therope side walls 32 of therope groove 31 are pressed from opposite sides against the rope. Athird frame 33 is pivotally connected to thesecond frame 28 by a joint 34 whose swivelingaxis 35 is parallel to thesecond axis 30 of rotation. Apress wheel 39 is mounted with bearings on thethird frame 33 so as to be rotatable about athird axis 40 of rotation, which is parallel to thesecond axis 30 of rotation, at a distance from the joint 34 so that the planes of rotation T1 and T2 of thepress wheel 39 and thepulley 29 are substantially at the same plane. Aspring 41 has been fitted to act between thesecond frame 28 and thethird frame 33 to press thepress wheel 39 towards thepulley 29 so that the press wheel exerts a wedging action on the rope to force it deeper into therope groove 31 to achieve a stronger frictional force. - The invention is not limited to the embodiment examples described above; instead, many variations are possible within the scope of the inventive concept defined in the claims.
-
new rope (1) diverting pulley (2) traction sheave (3) old rope (4) fixed overhead structure (5) elevator car (6) counterweight (7) drive apparatus (8) rope groove of traction sheave (9) relief device (10) joining element (11) rope pulling device (12) elevator shaft (13) top (14) topmost landing floor (15) support (16) rope reel (17) clamp jaws (18) supporter (19) bound guard (20) gap (21) interior space (22) wall (23) first frame (24) reel drum (25) first axis of rotation (26) braking device (27) second frame (28) pulley (29) second axis of rotation (30) rope groove (31) side wall (32) third frame (33) joint (34) swivel axis (35) press wheel (39) third axis of rotation (40) spring (41) hoisting device (42) beam (43)
Claims (19)
- A method for changing the rope of a traction sheave elevator, in which method the new rope (1) is fastened as an extension to the old rope (4) threaded over the diverting pulleys (2) and traction sheave (3), and the new rope is pulled by means of the old rope into the place of the old rope, characterized in that the new rope is pulled into the place of the old rope by means of a rope pulling device (12), which rope pulling device (12) is suspended on a fixed structure in the elevator shaft (13).
- A method according to claim 1, characterized in that the old rope (4) of the traction sheave elevator is secured by both ends to a fixed overhead structure (5) and passed between the ends over diverting pulleys (2) provided on the elevator car (6) and on a possible counterweight (7) and over the traction sheave (3) driven by a drive apparatus (8), and in which method:a) the elevator car (6) and possible counterweight (7) are supported on a fixed structure to ease the rope,b) the old rope (4) is taken clear of contact with the rope groove (9) of the traction sheave (3) and continued to be passed over the traction sheave,c) both ends of the old rope (4) are detached from the fixed overhead structure (5),d) one of the detached ends of the old rope (4) is joined to the end of the new rope (1) in an end-to-end manner,e) the old rope (4) and the new rope (1) connected as an extension to it are pulled so that the old rope and the new rope pass over the diverting pulleys (2) and traction sheave (3) until the new rope is in the former place of the old rope,f) the ends of the old rope (4) and new rope (5) connected together are released from each other,g) both ends of the new rope (1) are secured to the fixed overhead structure (5),h) the new rope (1) is brought into tractive contact with the traction sheave (3), andi) the support holding the elevator car (6) and the possible counterweight (7) is removed to allow them to be supported by the new rope (1).
- A method according to claim 2, characterized in that in step b) relief devices (10) are mounted on the rim of the traction sheave (3), and the old rope (4) is raised clear of contact with the rope groove of the traction sheave (3) and brought onto the relief devices to support it.
- A method according to claim 3, characterized in that after step h) and before step i) the relief devices (10) are removed from the rim of the traction sheave (3) and the new rope (1) is lowered into the rope groove (9) of the traction sheave.
- A method according to any one of claims 2 - 4, characterized in that in step d) the ends of the old rope (4) and new rope (1) are joined together by means of joining elements (11).
- A method according to any one of claims 2 - 5, characterized in that before step e) a rope pulling device (12) is brought into tractive contact with the old rope (4) at a point near the end of the old rope, and in step e) the ropes are pulled by the rope pulling device (12).
- A method according to any one of the claims 2 - 6, characterized in that before step a) the elevator car (7) is driven up to a position close to the upper end of the elevator shaft (13) so that the top (14) of the elevator car is at the level of the topmost landing floor (15), the counterweight being thus near the lower end of the elevator shaft (13), and in step a) a support (16) is placed under the counterweight (7), onto which support the counterweight (7) is lowered, and the elevator car (6) is raised upwards and locked in place, the rope (1) being now slackened.
- A method according to any one of claims 2 - 7, characterized in that a rope reel (17) with the new rope (1) coiled up on it is provided, and the new rope is uncoiled from the rope reel (17) during the change operation.
- A method according to claim 8, characterized in that the rope reel (17) is placed on the topmost landing floor to allow the new rope (1) to be uncoiled from the rope reel.
- A method according to any one of claims 2 - 9, characterized in that in step c) the old rope (4) is severed at a distance from the fixing point where it is fastened to the fixed overhead structure (5), and the new rope (1) is connected as an extension to the old rope by working on the top (14) of the elevator car (6).
- A method according to any one of claims 7 - 10, characterized in that the rope pulling device (12) is suspended on a fixed structure in the elevator shaft (13) by working on the top (14) of the elevator car (6).
- A method according to any one of claims 2 - 11, characterized in that during the change operation the old rope (4) is passed to the bottom of the elevator shaft (13), the freely hanging portion of the old rope thus forming a counterweight to the rope (1, 4) being pulled.
- A method according to any one of claims 2 - 12, characterized in that after the change the old rope (4) is gathered into a bundle from the bottom of the elevator shaft (13).
- An apparatus for replacing the old rope (4) of a traction sheave elevator with a new rope, which apparatus comprises:- a joining element (11) for joining the old rope (4) and the new rope (1) together end to end,characterized in that the apparatus comprises:- relief devices (10) to be mounted on the rim of the traction sheave (3) to keep the rope (1, 4) clear of contact with the rope groove (9) of the traction sheave (3),- a rope pulling device (12) for pulling the ropes (1, 4), which rope pulling device (12) is suspended on a fixed structure in the elevator shaft (13).
- An apparatus according to claim 14, characterized in that the relief device (1) comprises- a pair of clamp jaws (18) fitted to be pressed against opposite sides of the traction sheave (3),- a supporter (19), which is detachably and adjustably secured to the clamp jaws (18), and over which supporter the rope (1, 4) separated from the rope groove (9) of the traction sheave (3) can be passed,- a bound guard (20), which is detachably and adjustably secured to the clamp jaws (18) at a distance slightly larger than the thickness of the joining element (11) from the supporter so that the gap (21) remaining between the supporter (19) and the bound guard (20) is large enough to allow the ropes (1, 4) and the joining element (11) to pass through.
- An apparatus according to any one of claims 14 - 16, characterized in that the joining element (11) has been fitted to move along the rope grooves of the diverting pulleys (2).
- An apparatus according to any one of claims 14 - 16, characterized in that the joining element (11) is a metal sleeve comprising- an interior space (22) fitted to receive the ends of the ropes (1, 4) to be joined inside it, and- a substantially thin wall (23) that permits of being constricted with a crimping tool to allow the joining element (11) to be fastened to the ropes (1, 4) to be joined.
- An apparatus according to any one of claims 14 - 17, characterized in that the apparatus comprises a rope reel (17), which comprises- a first frame (24),- a reel drum (25) mounted with bearings on the first frame (24) so as to be rotatable about a horizontal first axis (26) of rotation, on which reel drum (25) the new rope (1) is coiled up, and- a braking device (27) for braking the rotation of the reel drum (25).
- An apparatus according to any one of claims 14 - 18, characterized in that the rope pulling device (12) comprises- a second frame (28),- a pulley (29) mounted with bearings on the second frame so as to be rotatable about a second axis (30) of rotation, which pulley comprises a rope groove (31) of V-shaped cross-section fitted to receive the rope into it so that the side walls (32) of the rope groove are pressed from opposite sides against the rope,- a third frame (33) pivotally connected to the second frame (28) with a joint (34) whose swiveling axis (35) is parallel to the second axis (30) of rotation,- a press wheel (39) mounted with bearings on the third frame (33) so as to be rotatable about a third axis (40) of rotation, which is parallel to the second axis (30) of rotation, at a distance from the joint (34) so that the planes of rotation of the press wheel (39) and the pulley (29) are substantially at the same plane, and- a spring (41) fitted to act between the second frame (28) and the third frame (33) to press the press wheel (39) towards the pulley (29) so as to exert a wedging action on the rope (1, 4) passed over the pulley to force it into the rope groove (31).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20040609A FI118645B (en) | 2004-04-29 | 2004-04-29 | Method and apparatus for changing the rope of a traction sheave |
FI20040609 | 2004-04-29 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP1591406A2 EP1591406A2 (en) | 2005-11-02 |
EP1591406A3 EP1591406A3 (en) | 2008-05-28 |
EP1591406B1 true EP1591406B1 (en) | 2009-12-02 |
EP1591406B2 EP1591406B2 (en) | 2016-07-06 |
Family
ID=32104240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05396015.9A Not-in-force EP1591406B2 (en) | 2004-04-29 | 2005-04-28 | Method for changing the rope of a traction sheave elevator |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1591406B2 (en) |
AT (1) | ATE450470T2 (en) |
DE (1) | DE602005017967D1 (en) |
ES (1) | ES2335898T5 (en) |
FI (1) | FI118645B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI119233B (en) * | 2005-11-14 | 2008-09-15 | Kone Corp | A method of replacing the elevator rope |
FI119320B (en) * | 2006-04-18 | 2008-10-15 | Kone Corp | Line feed device for mounting, replacing and / or retracting the carrier line in an elevator |
FI20070694A0 (en) * | 2007-09-11 | 2007-09-11 | Kone Corp | Elevator arrangement |
DE202007017986U1 (en) * | 2007-12-22 | 2009-02-12 | Drahtseilerei Gustav Kocks Gmbh & Co. | Mounting clamp for suspension elements and stop parts |
ES2342806B1 (en) * | 2008-07-29 | 2011-05-12 | Orona, S. Coop. | METHOD FOR REPLACING CABLES OF LIFTING DEVICES. |
DE102011121458B4 (en) * | 2011-12-16 | 2020-12-24 | Siemag Tecberg Gmbh | Traction sheave clamping device |
DK3290375T3 (en) | 2016-08-29 | 2019-09-30 | Kone Corp | ELEVATOR |
JP6520989B2 (en) * | 2017-07-12 | 2019-05-29 | 三菱電機ビルテクノサービス株式会社 | Rope detachment prevention jig for elevators and rope replacement method for elevators |
CN108975138B (en) * | 2018-07-27 | 2020-09-15 | 首钢集团有限公司 | Cage guide rope replacing method |
CN110844743B (en) | 2018-08-21 | 2022-07-12 | 奥的斯电梯公司 | Skip-floor elevator and skip-floor method |
CN110877852B (en) * | 2019-11-27 | 2022-06-28 | 山东东山古城煤矿有限公司 | System and method for quickly replacing rope of vertical shaft friction type elevator |
EP4326659A1 (en) * | 2021-04-22 | 2024-02-28 | KONE Corporation | A construction elevator arrangement and a method for producing the same |
CN115504356B (en) * | 2022-10-18 | 2023-11-10 | 太原钢铁(集团)有限公司 | Replacement method of traction steel wire rope of rail clamping vehicle in inclined or steeply inclined roadway |
CN116750617B (en) * | 2023-07-18 | 2024-01-02 | 特码斯派克工业技术(安徽)有限公司 | Quick rope changing mechanism and method for vertical shaft friction type elevator |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2603729B2 (en) * | 1989-10-04 | 1997-04-23 | 株式会社日立ビルシステムサービス | Elevator main rope hanging method |
JP3841616B2 (en) * | 2000-04-04 | 2006-11-01 | 株式会社日立ビルシステム | Elevator main rope replacement method and apparatus |
JP2003089486A (en) * | 2001-09-18 | 2003-03-25 | Mitsubishi Electric Building Techno Service Co Ltd | Device and method for replacing elevator main rope |
JP2004091208A (en) * | 2002-07-12 | 2004-03-25 | Hitachi Building Systems Co Ltd | Method and device for replacing main rope of elevator |
-
2004
- 2004-04-29 FI FI20040609A patent/FI118645B/en not_active IP Right Cessation
-
2005
- 2005-04-28 AT AT05396015T patent/ATE450470T2/en active
- 2005-04-28 EP EP05396015.9A patent/EP1591406B2/en not_active Not-in-force
- 2005-04-28 ES ES05396015.9T patent/ES2335898T5/en active Active
- 2005-04-28 DE DE602005017967T patent/DE602005017967D1/en active Active
Also Published As
Publication number | Publication date |
---|---|
ES2335898T5 (en) | 2016-10-10 |
EP1591406B2 (en) | 2016-07-06 |
DE602005017967D1 (en) | 2010-01-14 |
EP1591406A3 (en) | 2008-05-28 |
ES2335898T3 (en) | 2010-04-06 |
FI20040609A (en) | 2005-10-30 |
FI20040609A0 (en) | 2004-04-29 |
ATE450470T2 (en) | 2009-12-15 |
FI118645B (en) | 2008-01-31 |
EP1591406A2 (en) | 2005-11-02 |
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