WO2001068973A1 - Corde et ascenseur l'utilisant - Google Patents

Corde et ascenseur l'utilisant Download PDF

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Publication number
WO2001068973A1
WO2001068973A1 PCT/JP2001/000387 JP0100387W WO0168973A1 WO 2001068973 A1 WO2001068973 A1 WO 2001068973A1 JP 0100387 W JP0100387 W JP 0100387W WO 0168973 A1 WO0168973 A1 WO 0168973A1
Authority
WO
WIPO (PCT)
Prior art keywords
rope
sheave
wire rope
elevator
diameter
Prior art date
Application number
PCT/JP2001/000387
Other languages
English (en)
Japanese (ja)
Inventor
Kensuke Kato
Takashi Teramoto
Hiromi Inaba
Hiroshi Nagase
Ichiro Nakamura
Yuuji Yoshitomi
Original Assignee
Hitachi, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to EP01901497.6A priority Critical patent/EP1273695B1/fr
Priority to US10/110,961 priority patent/US7137483B2/en
Publication of WO2001068973A1 publication Critical patent/WO2001068973A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065—Roping
    • B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
    • D07B1/144—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for cables or cable components built-up from metal wires
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/148—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising marks or luminous elements
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/201—Wires or filaments characterised by a coating
    • D07B2201/2012—Wires or filaments characterised by a coating comprising polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/2042—Strands characterised by a coating
    • D07B2201/2044—Strands characterised by a coating comprising polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2087—Jackets or coverings being of the coated type
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2088—Jackets or coverings having multiple layers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2091—Jackets or coverings being movable relative to the internal structure
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2092—Jackets or coverings characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/50—Lubricants
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/206—Improving radial flexibility
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/2065—Reducing wear
    • D07B2401/207—Reducing wear internally
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2007—Elevators

Definitions

  • the present invention relates to a rope-type elevator, and more particularly to an elevator using a wire rope in which a strand is covered with a resin material and an outer periphery of a mouth is covered with a resin material.
  • Rope elevators are equipped with a drive system consisting of a motor, a reduction gear, a sheave, and a deflecting car.
  • the load on the car is loaded onto one of the main ropes (hereinafter referred to as ropes) wound around the sieve, It has a mechanism that applies the load of the counterweight to the car and raises and lowers the car and the counterweight by friction between the rope and sheave.
  • ropes are formed by twisting strands formed by twisting steel strands.
  • This steel rope satisfies the friction characteristics, abrasion resistance and fatigue characteristics required for lifting and driving an elevator, and is highly reliable.
  • the rope has a limited life because it is a consumable item.
  • Rope life factors are classified into four categories. In other words, fatigue due to bending and elongation to pass through the sheave, wear due to mutual movement of the wires, abrasion of the rope outer layer wires due to contact with the groove wall surface of the sheave, and corrosion due to contact with the atmosphere is there. For this reason, the ratio (D / d) between the rope diameter d and the sheave diameter D has been set at 40 or more in the past in order to reduce the effect of repeated bending of sheave passage.
  • the sheave diameter D is directly related to the motor drive torque required to raise and lower the car. In order to reduce the size and weight of elevator systems such as motors, it is necessary to reduce the sheave diameter.
  • the life of the rope decreases as the contact pressure with the sheave increases. That is, the rope contact pressure P rope is proportional to the rope tension F and inversely proportional to the sheave diameter D. Therefore, when the sheave diameter is reduced, the pressure increases (Propp ⁇ FZ (Dd)).
  • a plurality of strands made of twisted steel strands or synthetic fibers such as aramide fibers are arranged in a row, and they are contacted with sheaves using a flat belt covered with resin.
  • a method of reducing the pressure and extending the life of the resin coated on the rope surface is described in PCTW ⁇ 99Z438885.
  • rope bending is required. Rope life and strength reduction due to radius reduction must be suppressed.
  • Still another object of the present invention is to provide an elevator that secures safety and reliability by suppressing a decrease in the life and strength of a rope when the sheave diameter is reduced. Disclosure of the invention
  • a rope according to the present invention is configured such that a strand is formed by twisting a plurality of strands coated with a resin material, and a plurality of strands are twisted to form a wire rope. Is coated with a resin material.
  • the present invention provides an elevator, in which a car and a counterweight are connected by a plurality of ropes, and the rope is wound around a sheave driven by a motor and frictionally driven, the plurality of resin-coated steel elements are provided.
  • a strand is formed by twisting the wires, a single rope is formed by twisting a plurality of strands, the outer periphery of the entire wire rope is covered with a resin material, and the shape of the cross section perpendicular to the axial direction of the wire rope is A substantially circular elevator is proposed.
  • FIG. 1 is a schematic cross-sectional view of a first embodiment of the rope of the present invention
  • FIG. 2 is a diagram showing a fatigue test result of the rope strand of FIG. 1
  • FIG. 3 is a diagram of FIG.
  • FIG. 4 is a schematic view showing a state in which the rope is wound around a sheave groove
  • FIG. 4 is a schematic sectional view of a second embodiment of the mouthpiece of the present invention
  • FIG. FIG. 6 is a schematic sectional view of a third embodiment
  • FIG. 6 is a schematic sectional view of a fourth embodiment of the rope of the present invention
  • FIG. 7 is a schematic sectional view of a fifth embodiment of the mouthpiece of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a first embodiment of the rope of the present invention
  • FIG. 2 is a diagram showing a fatigue test result of the rope strand of FIG. 1
  • FIG. 3 is a diagram of FIG.
  • FIG. 4 is a schematic view showing
  • FIG. 8 is a perspective view of a first embodiment of the elevator of the present invention
  • FIG. 9 is a plan view of the first embodiment of the elevator of the present invention
  • FIG. 11 is a plan view of a second embodiment of the elevator according to the present invention.
  • FIG. 11 is a perspective view of a third embodiment of the elevator according to the present invention.
  • FIG. 12 is a perspective view of a fourth embodiment of the elevator according to the present invention.
  • FIG. 13 is a perspective view of a fifth embodiment of the elevator of the present invention
  • FIG. 14 is a perspective view of a sixth embodiment of the elevator of the present invention
  • FIG. FIG. 16 is a perspective view of an elevator according to a seventh embodiment of the present invention.
  • FIG. 16 is a perspective view of an elevator according to an eighth embodiment of the present invention.
  • FIG. 17 is a perspective view of a ninth embodiment of the elevator according to the present invention. It is a perspective view. BEST MODE FOR CARRYING OUT THE INVENTION
  • the wire rope as a load support member is formed by twisting steel strands
  • the strand is formed by further twisting. Because of its flexibility, ropes are wound around or wrapped around sheaves, and are used as moving lines in a wide range of mechanical systems, including elevators. Since the rope made of copper is a consumable part, its longer life contributes to the improvement of the reliability and safety of the mechanical system. As mentioned earlier, the ratio between the rope diameter d and the sheave diameter D (DZ d) has conventionally been used to reduce fatigue and wear due to repeated bending of the sheave, which is one of the factors affecting the life of the steel rope. Is set to a certain value or more (40 or more in the case of an elevator) according to the mechanical system.
  • the rope according to the present invention has a structure shown in the following examples in order to eliminate the influence of the above-mentioned four factors as much as possible and to achieve a long life.
  • a wire rope 1 as a load supporting member is configured by twisting steel strands 2 to form strands 3 and further twisting strands 3.
  • Each wire 2 is provided with a wire coating 4, the entire rope 1 is covered with an intermediate coating material 6, and the outermost layer is provided with a rope coating 5.
  • ⁇ a ⁇ ⁇ / 2 ⁇
  • the stress generated in the wire 2 is reduced by reducing the diameter ⁇ of the wire 2 it can.
  • conventional elevators use a wire rope with a sheep diameter of 50 Omm and a wire diameter of 0.8 mm used for it.
  • a fatigue test was performed by partially oscillating tension using a steel wire having a carbon content of 0.7% and a diameter of 0.3 mm, and the fatigue limit ⁇ a1 was determined.
  • the average stress at this time is 50 OMPa.
  • Fig. 2 shows the results. From this, it was clear that the fatigue limit ⁇ a1 was such that the stress amplitude ⁇ a was about 26 OMPa.
  • the ratio DZd between the rope diameter d and the sheave diameter D should be 40 or less. The following equation must be satisfied.
  • the sheave diameter D is 50 Omm
  • the rope diameter d is 12 mm
  • the strand ⁇ constituting the rope 1 is 0.8 mm.
  • the ratio D / d of the sheave diameter D to the rope diameter d is 41.7.
  • the sheave diameter D was reduced to 20 Omm
  • the rope diameter d was 12 mm
  • the diameter ⁇ of the wire constituting rope 1 was 0.50 mm.
  • DZd is 16.7 when composed by the degree.
  • the sheave diameter D is reduced to 100 mm
  • the rope diameter d is 12 mm
  • the diameter ⁇ of the wire constituting the rope 1 is about 0.25 mm
  • the DZd is 8.3 mm.
  • the bending stress ⁇ b generated in the strand 2 can be reduced by reducing the diameter ⁇ of the strand 2 as described above.
  • the reduction in the diameter of the wire 2 has an adverse effect on the life in consideration of wear due to mutual movement of the wire 2 which is a life factor of the rope.
  • the mutual movement amount of the strands 2, that is, the sliding distance increases with an increase in the rope diameter d.
  • the rope diameter d be small.
  • the decrease in the rope diameter d also decreases the breaking strength of the rope 1 at the same time, it is necessary to increase the breaking strength of the strand 2.
  • the wire 2 constituting the mouth 1 is made of a wire having a breaking strength of 1,770 MPa or more.
  • the wire coating 4 was applied to the surface of the wire 2.
  • Wire sheath 4 is made of polyethylene, polyamide, 4-foot It is composed of resins such as chemical titanium, polyurethane, epoxy, and vinyl chloride. These wire coatings 4 have a lower elastic modulus than steel, so that when the wires 2 come into contact with each other, a contact area is ensured, and sliding occurs at a low surface pressure. As a result, local concentrated contact does not occur in the wire 2 and wear of the wire 2 is reduced.
  • the wire coating 4 for the purpose of reducing the wear of the wire 2 is formed of a material having a lower plastic flow pressure than steel, that is, a soft coating material.
  • the frictional force due to the sliding contact between the strands 2 is roughly expressed by the product A w ⁇ s of the contact area A w and the shear strength s of the material.
  • the contact area A w is approximately equal to (vertical load) Z (plastic flow pressure of the material)
  • the contact area of the base material steel is small.
  • the wire sheath 4 made of a soft sheath material having a low shear strength receives the shearing caused by mutual slip of the wires 2, and the steel wire 2 as a base material supports the vertical load, and the low friction Get.
  • the soft coating material forming the wire coating 4 has an effect even when a solid lubricant such as molybdenum disulfide and graphite is used.
  • a rope coating 5 was applied to the outermost layer surface of the rope 1 in order to reduce abrasion between the strand 2 and the sheave groove.
  • This covering material may be one of the covering materials of the wires 2 shown above.
  • wear is closely related to the ratio of the contact surface pressure to the yield pressure of the material, and by reducing this, the amount of wear can be reduced.
  • a decrease in the contact surface pressure is effective in reducing the amount of wear.
  • the rope 1 is covered in a closed state and brought into contact, the radius of curvature at the contact point increases, and the contact area increases. That is, the contact surface pressure can be reduced.
  • the contact area can be increased and the contact surface pressure can be reduced.
  • the intermediate covering material 6 is disposed between the strand 2 and the outermost covering 5 to reduce wear from inside the rope covering 5. Further, the rope coating 5 also has a function of shielding the entire rope 1 from the outside air, so that the corrosion resistance of the rope 1 is improved.
  • the rope 1 is stable and reliable even in mechanical systems exposed outdoors. And the life can be ensured. It is also desirable that the rope covering material be flame retardant. Further, since the rope covering 5 can be colored in any color, the design of a mechanical system installed outdoors or indoors can be varied. Since the rope 1 is configured as described above, the steel wires 2 do not directly contact each other or the sheave grooves. For this reason, in the strand 3 configured by twisting the plurality of strands 2, it is not necessary for the strands arranged in the outer layer to have particularly wear resistance.
  • the rope 1 according to the present invention is preferably constituted by a Warrington-type strand 3 in which the diameters ⁇ of the individual wires 2 are substantially equal.
  • the twisting method of the rope 1 used in the mechanical system includes the rung twisting in which the twisting direction of the strand 2 and the strand 3 are the same, and the twisting direction of the strand 2 and the strand 3 There is a normal twist whose direction is opposite.
  • the angle between the strand 2 and the central axis of the rope 1 is larger than that of the ordinary twisted rope, so that the entire rope has high flexibility in bending. Therefore, when the rope 1 of the present embodiment is used for reducing the sheave diameter, for example, in the case of an elevator, when the value of the ratio DZ d between the rope diameter d and the sheave diameter D is less than 40, when the rope 1 is used. Rope 1 burned with rungs is used. In addition, compared to ordinary stranded ropes, rung stranded ropes have longer strands on the rope surface and a smoother surface, so there is less local contact and lower contact pressure.
  • the compressive stress acting on the rope coating 5 is lower than that of the ordinary twisted rope.
  • the contact pressure between rope 1 and sheave increases as the sheave diameter decreases.
  • the value of the ratio D / d of the rope diameter d to the sheave diameter D is 40%.
  • the mouth 1 twisted by the Lang twist is used.
  • a normal twisted rope has a greater resistance to rotation acting in the direction in which the twist returns when tension is applied. Accordingly, when the rope 1 of the present embodiment is applied to a mechanical system in which suppressing rotation of the rope 1 is prioritized, the rope 1 burned with a normal twist is used.
  • Deterioration and life of the rope 1 as a load supporting member is caused by the breakage of the strand 2 constituting the rope 1.
  • Deterioration determination of the rope 1 whose outermost layer is covered with the rope coating 5 is performed by detecting breakage of the strand 2 constituting the load supporting member by a magnetic flaw detection method such as a leakage magnetic flux method.
  • FIG. 3 is a schematic cross-sectional view of the rope 1 according to the present invention wound around a sheave 7.
  • the rope 1 is wound around the sheave groove 8, and the sheave 7 is rotated by an electric motor (not shown), and the rope 1 is driven by a frictional force generated between the rope 1 and the sheave groove 8. Is done.
  • the sheave groove 8 is formed in a lining 9 attached to the sheave 7, and the lining 9 is detachable from the sheave 7.
  • the lining 9 is made of a resin such as polyurethane, polyamide, or polyethylene in consideration of the frictional force and abrasion generated with the rope coating 5.
  • the contact with the rope covering material 5 which is a similar resin material becomes elastic or viscoelastic resin friction, and a sufficient friction force for an elevator can be secured.
  • a resin material coating can secure appropriate frictional force and wear resistance.
  • FIG. 4 is a schematic sectional view of a second embodiment of the rope according to the present invention.
  • This embodiment is different from the first embodiment in that a fiber core 10 is arranged at the center of the rope 1.
  • the fiber core 10 is formed of natural fibers such as hemp, or synthetic fibers such as polypropylene, polyester, polyamide, polyethylene, aramide, and PB ⁇ .
  • the twist of the fiber core is set so that the elongation of the strand 3 formed from the steel strand 2 matches the elongation of the fiber core, and the load can be appropriately distributed to both.
  • a resin material such as polyurethane, polyamide, and polyethylene may be used as the rope core material.
  • FIG. 5 is a schematic sectional view of a third embodiment of the rope according to the present invention.
  • This embodiment differs from the first embodiment in that the strand 3 arranged at the center of the rope is covered with the strand 11.
  • the strand coating 11 is made of a resin material such as polyurethane, polyamide, or polyethylene. As a result, as in the previous embodiment, the wear of the wire 2 or the wire coating 4 due to mutual slippage can be reduced. All the strands 3 may be covered with strands.
  • FIG. 6 is a schematic sectional view of a fourth embodiment of the rope according to the present invention.
  • the difference of this embodiment from the first embodiment is that the strand coating 11 is applied to all the strands 3. Thereby, the effect of reducing abrasion of the wire 2 or the wire coating 4 due to mutual sliding of the strands 3 becomes larger than in the previous embodiment.
  • FIG. 7 is a schematic sectional view of a fifth embodiment of the rope according to the present invention.
  • the difference of the present embodiment from the sixth embodiment is that each strand is not covered, each strand 3 is covered with a strand covering 11, and the interior is filled with a lubricant 12. is there.
  • a solid lubricant such as molybdenum disulfide or graphite, or an oil or fat such as grease is used.
  • the life can be further extended as compared with the sixth embodiment. In the above-described embodiments, the life can be extended by filling the same material as the covering material as a filler between the strands.
  • FIG. 8 is a perspective view of a first embodiment of an elevator using the above-described wire rope.
  • FIG. 9 is a plan view of the hoistway of the embodiment, which is drawn from above.
  • the elevator car 51 is supported by a rope 53 via a car lower pulley 52.
  • One end of the rope 53 is fixed to the building at a support point 54.
  • the other end passes through the balancing weight pulley 58 installed on the car pulley 52, sheave 56, and balancing weight 57, and is fixed to the building at the support point 55.
  • the sheave 56 is rotated by the driving device 59, and the friction force between the sheave 56 and the rope 53 causes the rope 5 to rotate. 3 is driven to move the car 51 and the counterweight 57 vertically.
  • the drive 59 is provided with a brake 60.
  • FIG. 8 illustrates the driving device 59 as a gearless driving device including one motor
  • a geared driving device using a reduction gear may be used.
  • the car 51 is regulated by a guide device 61 and a car rail 62 so as to be movable only in the vertical direction.
  • the counterweight 57 is not shown, but is regulated by the guide device and the counterweight rail 63 so that it can move only in the vertical direction.
  • car side doors 7 2a and 7 2b will be installed on car 51 so as to be opposed to landing side doors 73 a and 73 b installed on the hoistway side.
  • the drive unit 59 is drawn so as to protrude above the car 51, but the car 51 and the hoistway wall are formed using thinner motors and reduction gears. It is permissible to install a driving machine 59 in the gap 6 4.
  • the pulley under the car 5 2 has a small diameter, and the protrusion of the pulley 5 1 below the car 5 1 is reduced, so that the depth can be made shallower than the conventional pit. Therefore, the effect of reducing building construction costs can be obtained.
  • the lower car pulley 52 can be made smaller, the total weight of the car can be reduced, and the car 51 can be accelerated / decelerated with a small driving force.
  • the car 51 is generally provided with an emergency stop device for braking the car 51 when the rope 53 is broken.
  • the braking force required for the safety gear is reduced, and the safety gear can be made lighter than conventional equipment. Furthermore, as the sheave 56 becomes smaller in diameter, the number of revolutions of the sheave 56 necessary for moving the car 51 at a specified speed increases, and the torque generated by the drive unit 59 decreases. Become. That is, the drive unit 59 operates at high speed and with small torque Will be done. As a result, when the driving device 59 is a gearless driving device, the diameter of the motor can be reduced. When a geared drive is used, the reduction ratio of the reduction gear can be reduced or the reduction gear can be eliminated. As a result, it is possible to reduce the installation space of the drive unit 59 at the top of the hoistway, and it is possible to obtain an effect of reducing the projecting amount of the hoistway when the ceiling of the building on the top floor is low.
  • the sheave 56, the balancing weight pulley 58 and the balancing weight 57 in the hoistway are required.
  • the sheave 56 and the balancing weight pulley 58 are required.
  • the sheave 56 and the counterweight pulley 58 are reduced in diameter, the installation position of the counterweight pulley 58 moves in the direction of arrow A in the figure. This increases the gap between the hoistway wall 64 and the counterweight 57 in the upper part of the figure, so that the width of the counterweight 57 (dimension B in the figure) can be increased.
  • the thickness of the balancing weight (dimension C in the figure) for constructing the balancing weight 57 with the same weight is reduced, and the gap between the car 51 and the hoistway wall 64 (dimension D in the figure) is reduced. Can be reduced, and the effect of reducing the hoistway occupation area can be obtained.
  • the longer the rope 53 the longer the rope replacement cycle can be. That is, the coefficient of friction between the rope 53 and the sheave 56 becomes larger than in the case where a conventional mouthpiece is used, and the pressing force of the rope 53 on the sheave 56 can be reduced.
  • This pressing force is generated by the rope tension generated by the weight of the weight 57 which is in balance with the car 51. Therefore, even if the pressing force is reduced, that is, even if the weight 57 is balanced with the car 51, no slippage occurs between the rope 53 and the sheave 56.
  • the manufacturing cost of the car 51 and the counterweight 57 can be reduced, and the capacity of the driving machine 59 and the power source can be reduced.
  • the longitudinal axes of the car lower pulley 52 and the sheave 56 are not in the same direction, but are substantially at right angles.
  • the flat belt is twisted between the pulley under the car 52 and the sheave 56.
  • the twisted flat belt has a slanted entrance surface to the pulley 52 and the sheave 56 below the car, which causes uneven wear and unstable friction characteristics.
  • the rope 53 of the present invention has a substantially circular cross section, uneven wear does not occur and friction characteristics do not become unstable even in a layout in which torsion occurs.
  • resin fiber ropes generally deteriorate and become brittle due to ultraviolet rays, and cannot be used under conditions where sunlight directly or indirectly enters the hoistway, such as an observation elevator or outdoor installation elevator.
  • the rope of the present invention uses a steel wire as a strength member that bears a load, it is not deteriorated by ultraviolet rays and can be used in the above-described environment.
  • resin fiber rope deteriorates at about 2 ° C to about 700 ° C and its strength is extremely reduced. There is.
  • a flat belt containing steel stranded wires if the building becomes hot due to a building fire, the exterior resin material that binds the steel stranded wires will melt, making it easier for the steel stranded wires to entangle with each other, and the elevator will malfunction. there is a possibility.
  • the rope of the present invention uses a steel wire as a strength member to bear the load, so even if the inside of the hoistway becomes hot during a fire, the resin coating material only melts and the strength is It is kept up to around 1000 degrees Celsius like the wire rope of The use of elevators is prohibited in the event of a building fire, so low rope durability during a building fire does not directly impair the safety of the elevator.However, if an elevator is used in a building fire due to an accident, In response to the above, the above effects are effective.
  • the rope length becomes longer as the lift becomes higher, and the rope bears the weight of the rope itself, so that there is a problem that the rope strength must be further increased.
  • the rope 53 of the present invention has a smaller weight per unit length than a conventional wire rope of equivalent strength. For this reason, even when used in a high-lift elevator, the problem of an increase in suspension load due to the weight of the rope can be reduced.
  • the mouthpiece of the present invention is lightweight, it is easy to carry in, carry out, hang over, and remove ropes when installing elevators and replacing ropes. Also, in the combination of the conventional wire rope and steel sheave, noise is generated by the contact between the rope and the sheave. This is a remarkable tendency particularly in a high-speed elevator in which the sheave rotates at a high speed. On the other hand, when the rope of the present invention is used, the surface of the rope is covered with a resin softer than steel, so that generation of contact noise can be suppressed regardless of whether the sheave is made of steel or resin.
  • wire ropes are impregnated with lubricating oil to prevent wear between strands or strands.
  • this could result in oil pollution such as scattering of lubricating oil and adhesion to clothing.
  • the rope of the present invention does not use lubricating oil, so that no oil pollution occurs.
  • wire ropes are not exposed to the passenger occupants such as cars, but the above effects are effective in preventing contamination of hoistway walls and improving the working environment for maintenance and inspection workers.
  • resin fiber ropes generally have a large initial elongation at the start of use, and when used in elevators, the rope length must be adjusted after a certain period of time after installation. This is because the resin fiber itself is softer than the steel wire, so it takes time to conform and adhere.
  • the rope of the present invention since the central portion is formed of a steel wire, the initial elongation is stabilized at an early stage similarly to the conventional wire rope, and it is not necessary to adjust the rope length again.
  • the surface of the rope of the present invention is coated with a resin, it can be colored in any color by selecting a resin type or mixing a pigment into the resin.
  • the building ⁇ hoistway and the rope 53 are made the same color to make the presence of the rope inconspicuous, or conversely colored in a completely different color from the building ⁇ hoistway.
  • the rope may be colored differently for each part, and the color may be different depending on the vertical position of the car 51. In this case, it is necessary to prevent the resin layer from separating at the color boundary.
  • FIG. 10 shows a plan view of a second embodiment in which an elevator is constructed using the rope of the present invention.
  • the difference between this embodiment and the embodiment of FIG. 9 is that the installation position of the counterweight 57 is different. That is, a counterweight 57 is installed between the opposite side of the car-side doors 72 a and 72 b of the car 51 and the hoistway wall 64.
  • the arrangement of the pulley under the car 52, sheave 56, drive unit 59, etc. will be changed. Such a difference in arrangement is caused by restrictions on the building layout.
  • the longitudinal pulley 58 is also in balance with the sheave 56. The direction axes also point in different directions. That is, the rope is twisted between the pulley 52 and the sheave 56, and further twisted between the sheave 56 and the weight pulley 58.
  • FIG. 11 is a perspective view of a third embodiment of an elevator using the rope of the present invention.
  • the sheave 56, the driving device 59 and the brake 60 are installed at the bottom of the hoistway.
  • the main advantage of this configuration is that the drive unit 59, which can generally generate noise, can be installed at the bottom of the hoistway, where noise is less likely to be a problem, rather than at the top of the hoistway where noise is most likely to sound. .
  • the length of the rope 53 is longer and the weight of the entire rope is greater than in the embodiment shown in FIGS. 8 and 9, so that a great deal of labor is required for the installation work. There is.
  • FIG. 12 is a perspective view of a fourth embodiment of an elevator using the rope of the present invention.
  • the position of the counterweight 57 in FIG. 11 is arranged on the back side of the car as shown in FIG.
  • the rope 53 It has both the problem of Fig. 10 that twist is applied at two places and the problem of Fig. 11 that the weight of the entire rope increases due to the long rope length.
  • uneven wear and instability of friction characteristics can be prevented even in a layout to which twist is applied, and the weight of the entire rope can be reduced.
  • FIG. 13 is a perspective view of a fifth embodiment of an elevator using the rope of the present invention.
  • a sheave 56, a driving device 59, and a brake 60 are arranged in a machine room provided at the top of the hoistway or on the hoistway.
  • the car 51 is supported by a car frame 68 and further suspended by a mouthpiece 53 through a vertical frame 69 and a crosshead 70.
  • One end of the rope 53 is attached to the crosshead 7 ⁇ , via a sheave 56 and a warp wheel 67, and the other end is attached to a counterweight 57.
  • the present configuration can also use the rope of the present invention.
  • the warp wheel 67 is often used, and the winding angle, that is, the angle at which the rope 53 is wound around the sieve 56, is compared to a configuration in which the warp wheel 67 is not used.
  • the range is likely to be small.
  • the frictional force between the sheave 56 and the rope 53 has the characteristic of decreasing as the winding angle decreases. For this reason, the friction force is insufficient, and the sheave 56 and the rope 53 become slippery.
  • the rope 53 of the present invention when used, a higher frictional force can be obtained as compared with a conventional wire rope, so that it is possible to construct a highly reliable elevator without the rope 53 slipping. Becomes
  • FIG. 14 is a perspective view of a sixth embodiment of the elevator using the rope of the present invention.
  • a thin drive device 59, a brake 60, and a sheave 56 are used.
  • the drive unit 59 of the present embodiment is preferably constituted by a permanent magnet type gearless synchronous motor.
  • the diameter of the sheave 56 is large, The rotation speed of the sheave 56 necessary for moving the car 51 at the same speed decreases, and the torque generated by the drive unit 59 increases.
  • the diameter of the motor constituting the drive unit 59 must be excessively large.
  • the sheave 56 can be made small in diameter, and the diameter of the drive unit 59 can be appropriately reduced to reduce the hoistway dimension.
  • FIG. 15 is a perspective view of an elevator using a rope according to a seventh embodiment of the present invention.
  • the car 51 is lifted by the rope 53 at the hanging point 71.
  • the rope 53 is then connected to the counterweight 57 via a sheave 56.
  • This configuration has an advantage that the structure around the car can be simplified because the vertical frame and the crosshead are not used to lift the car 51. Furthermore, by eliminating the need for a crosshead, the overall height including the car and the crosshead is reduced, so that the extra space provided at the top of the hoistway can be reduced.
  • the driving device 59 is installed in the extra space, the smaller the height of the driving device 59, the smaller the extra space.
  • the sheave 56 becomes smaller in diameter, and the diameter of the motor constituting the drive unit 59 in conjunction with it becomes smaller, so that the height of the drive unit 59 is reduced. This has the effect of making it possible to reduce the extra space at the top of the hoistway.
  • FIG. 16 is a perspective view of an eighth embodiment of an elevator using the rope of the present invention.
  • a driving machine 59, a brake 60, and a sheave 56 are provided inside the counterweight 57, and the rope 53 is driven by the sheave 56 so that the car 51 and the counterweight 57 are provided. Is moved up and down.
  • the space of the hoistway can be reduced more than before.
  • the driving machine 59, brake 60, and sheave 56 inside the counterweight 57 these devices must be miniaturized.
  • the sheave 56 can be reduced in diameter, so that the driving machine 59 and the brake 60 can be downsized, and these can be balanced and the weight 57 can be installed inside. .
  • FIG. 17 is a perspective view of a ninth embodiment of an elevator using the rope according to the present invention.
  • a car 51 is balanced with a weight 57 by a top pulley 65 and a rope 53.
  • the rails 7 6 are sandwiched between the drive rollers 74 and the holding rollers ⁇ 5, and the drive rollers 74 are rotated by the drive unit 59, so that the weights 57 are balanced with the car 51.
  • This embodiment also has the effect of reducing the space of the hoistway as there is no need to install a driving machine or the like on the building side, as in the embodiment of FIG.
  • a configuration in which the top pulley 65 is supported by the rail 76 is preferable in order to prevent the suspension load from being imposed on the building side.
  • the diameter of the top pulley 65 can be reduced, so that the horizontal displacement between the top pulley 65 and the rail 76 is reduced, the bending moment is reduced, and the weight of the rail 76 is reduced. Will be possible.
  • the rope of the present invention can be used for applications other than the elevator described above. As one of them, the case where it is applied to a lifting crane will be described. Since lifting cranes are generally used outdoors or in relatively large indoor spaces, the ropes that make them up are easily exposed to wind, rain and dust. As a result, the life of the rope is shortened due to wear caused by the generated dust. On the other hand, in the rope of the present invention, since the surface of the rope is covered with the resin layer, the steel stranded wire portion, which is the strength component, is not directly exposed to wind, rain, and dust. Therefore, the life of the rope can be extended as compared with the conventional wire rope.
  • the surface resin layer is easily colored, the coloring is performed in a highly visible color, so that a worker of the lifting crane or a worker who performs slinging work around the crane is used.
  • the color of the rope surface resin layer is preferably yellow, orange, or various fluorescent colors.
  • the surrounding environment is of the same system as these colors and visibility is not improved, other colors may of course be used.
  • the rope of the present invention for applications other than elevators, a case where the present invention is applied to a gondola lift used in a ski resort or the like will be described. These gondler lifts are often used outdoors, similarly to the above-mentioned lifting cranes. Therefore, the ropes of the present invention have a long weathering life due to the high weather resistance obtained by being coated with resin. Is obtained.
  • the appearance of conventional wire ropes is not suitable for a single scene because the steel wire is bare.
  • the rope of the present invention it is easy to color the surface resin layer, so that a lift having an appearance suitable for a landscape can be configured.
  • a lift having an appearance suitable for a landscape can be configured.
  • colors with high visibility such as red, blue, and green are suitable.
  • by making the rope colors of the adjacent lifts different from each other it is possible to obtain an effect that it is easy to determine in which direction the lift that the passenger intends to select is moving in.
  • the rope of the present invention does not require the application of lubricating oil, so that there is no danger of staining passenger clothes.
  • the rope used for the ski lift must be connected at both ends to make it endless.
  • the strands constituting the rope are loosened and spliced to knit the strands at each end to make the rope endless.
  • an endless rope is obtained by the following operation.
  • the surface coating resin at each end is removed for a certain section.
  • the strands that constitute the steel rope inside are loosened, and splicing is performed to knit the strands at each end. After that, the processed part is covered with the resin material again.
  • re-coating must be done at least by a highly waterproof method.
  • a preferred example is heating a tube made of heat-shrinkable resin. It is preferable to use a structure in which a resin tape with an adhesive material is wound around. Also, if the space between the original surface resin layer and the re-coated resin is sealed with a sealing material, the waterproofness is further improved.
  • the present invention is configured as described above, when the sheave of the elevator is reduced in diameter, it is possible to suppress or improve the concern about a decrease in rope life. This will reduce the size and weight of motors and hoisting machines and other equipment, save space for elevator installation, and improve the safety and reliability of the system due to the longer rope life.

Abstract

L'invention concerne un ascenseur dans lequel le diamètre des poulies est réduit et la diminution corollaire de la durée de vie de la corde ainsi que sa résistance sont supprimées pour garantir une sécurité et une fiabilité. Pour ce faire, une corde est utilisée dans laquelle une pluralité d'éléments de fil constituant la corde en fil sont chacun recouverts d'une matière en résine et la corde à fils entière est recouverte de matière en résine, réduisant ainsi l'usure due au glissement entre les éléments de fil et l'usure due au contact avec la poulie, ladite usure se produisant lorsque la corde est entraînée autour de la poulie. Lorsque le diamètre de la poulie d'ascenseur est réduit, une diminution inquiétante de la durée de vie de la corde peut être éliminée ou la durée de vie de la corde peut être améliorée. Ainsi, il est possible d'obtenir une réduction de la taille et du poids du matériel notamment des moteurs et des treuils, une économie d'espace d'installation pour les ascenseurs, une sécurité et une fiabilité améliorées du système du fait de la durée de vie prolongée des cordes.
PCT/JP2001/000387 2000-03-15 2001-01-22 Corde et ascenseur l'utilisant WO2001068973A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01901497.6A EP1273695B1 (fr) 2000-03-15 2001-01-22 Corde et ascenseur l'utilisant
US10/110,961 US7137483B2 (en) 2000-03-15 2001-01-22 Rope and elevator using the same

Applications Claiming Priority (2)

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JP2000077776A JP3724322B2 (ja) 2000-03-15 2000-03-15 ワイヤロープとそれを用いたエレベータ
JP2000-77776 2000-03-15

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WO2001068973A1 true WO2001068973A1 (fr) 2001-09-20

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EP (1) EP1273695B1 (fr)
JP (1) JP3724322B2 (fr)
CN (1) CN1177100C (fr)
WO (1) WO2001068973A1 (fr)

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EP1426482A4 (fr) * 2001-09-12 2007-02-14 Hitachi Ltd Corde
US20140124301A1 (en) * 2002-01-09 2014-05-08 Kone Corporation Elevator
CN1309648C (zh) * 2002-01-09 2007-04-11 通力股份公司 电梯
CN100455504C (zh) * 2002-01-09 2009-01-28 通力股份公司 电梯
US8556041B2 (en) 2002-01-09 2013-10-15 Kone Corporation Elevator with traction sheave
WO2003057611A3 (fr) * 2002-01-09 2004-04-08 Kone Corp Ascenseur
US9446931B2 (en) * 2002-01-09 2016-09-20 Kone Corporation Elevator comprising traction sheave with specified diameter
EP1327598A1 (fr) * 2002-01-09 2003-07-16 Kone Corporation Ascenseur avec machinerie de dimensions réduites
WO2003101876A1 (fr) * 2002-05-30 2003-12-11 Mitsubishi Denki Kabushiki Kaisha Appareil elevateur
JP2005529043A (ja) * 2002-06-07 2005-09-29 コネ コーポレイション コーティングされた巻上ロープを設けたエレベータ
US9428364B2 (en) 2002-06-07 2016-08-30 Kone Corporation Elevator provided with a coated hoisting rope
WO2004002868A1 (fr) * 2002-06-27 2004-01-08 Mitsubishi Denki Kabushiki Kaisha Cable d'ascenseur et son procede de fabrication
WO2004106212A1 (fr) * 2003-05-30 2004-12-09 Hitachi, Ltd. Systeme d'ascenseur

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Publication number Publication date
JP3724322B2 (ja) 2005-12-07
EP1273695B1 (fr) 2018-10-24
CN1177100C (zh) 2004-11-24
EP1273695A4 (fr) 2008-12-17
EP1273695A1 (fr) 2003-01-08
JP2001262482A (ja) 2001-09-26
CN1388844A (zh) 2003-01-01

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