CN1251953C - Elevator rope and elevator apparatus - Google Patents

Abstract

The present invention relates to a rope for elevators, which is provided with a strip-shaped rope body, wherein the rope body is composed of multiple sub-ropes mutually arranged at intervals in the width direction of the rope body, and a cladding body made of resin for integrally cladding the sub-ropes. A plurality of gaps extending along the length direction of the sub-ropes are respectively arranged at mutual intervals in the length direction of the sub-ropes between the adjacent sub-ropes of the cladding body.

Description

Elevator ropes and elevator devices

technical field

The present invention relates to a belt-shaped elevator rope for suspending a car and an elevator apparatus using the rope.

Background technique

In Japanese Patent Application Laid-Open No. 2002-504471, various outlines of an elevator system in which a car and a counterweight are suspended by belt ropes are disclosed. However, the specific structure of the ribbon rope is not fully introduced, but the structure of the ribbon rope is required to ensure stable strength and prolong the service life.

Contents of the invention

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to obtain a rope for an elevator and an elevator apparatus using the rope which can ensure stable strength and prolong the service life.

The elevator rope according to the present invention has a belt-shaped rope main body and is used for suspending the car of the elevator. In the covering body made of the present invention, in the part between the adjacent sub-strings of the covering body, a plurality of gaps extending along the length direction of the sub-strings are respectively arranged at intervals in the length direction of the sub-strings.

In addition, the elevator device based on the present invention has: a drive device for driving the winch sheave; a main rope with a belt-shaped rope main body wound on the drive sheave; The driving force of the device lifts the car and the counterweight. The driving device, the car and the counterweight are assembled so that twisting can be generated on the rope main body. In the covering body made of resin in which the strands are integrated, a plurality of gaps extending in the longitudinal direction of the strands are respectively provided at intervals between adjacent strands of the covering body in the longitudinal direction of the strands.

Description of drawings

Fig. 1 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention.

Fig. 2 is a schematic view showing the disposition relationship between the driving sheave and the car hanging sheave in Fig. 1 .

Fig. 3 is a sectional view showing the main cable of Fig. 1 .

Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3 .

Fig. 5 is a cross-sectional view showing an elevator rope according to Embodiment 2 of the present invention.

Fig. 6 is a sectional view showing an elevator rope according to Embodiment 3 of the present invention.

Fig. 7 is a cross-sectional view taken along line VII-VII of Fig. 6 .

Detailed ways

The best embodiments of the present invention will be described below with reference to the drawings.

[Embodiment 1]

Fig. 1 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, on the top of the hoistway 1, a driving device 3 with a belt-driven sheave 2 and a deflector wheel 4 that is free to rotate are equipped. A plurality of belt-shaped main ropes 5 serving as elevator ropes are wound around the drive sheave 2 and the deflector sheave 4 . Each main cable 5 has a first end portion and a second end portion 5a, 5b. The first end portion and the second end portion 5 a, 5 b are connected to a support beam 6 fixed to the inner upper portion of the hoistway 1 .

The car 7 and the counterweight 8 are suspended in the hoistway 1 by the main rope 5, and rely on the driving force of the driving device 3 for lifting. The car 7 is provided with a car suspension sheave 9 wound by the main rope 5 . On the counterweight 8, a counterweight suspending wheel 10 suspended by the main rope 5 is provided.

Fig. 2 is a schematic diagram showing the disposition relationship between the driving sheave 2 and the car hanging sheave 9 in Fig. 1 . The driving sheave 2 and the car suspension sheave 9 are arranged such that their rotation axes extend in directions intersecting at right angles in the vertical projection plane. As a result, the main rope 5 is twisted by 90° between the drive sheave 2 and the car suspension sheave 9 . In other words, the driving device 3 , the car 7 and the counterweight 8 are arranged so as to be able to form a twist on the main rope 5 .

FIG. 3 is a sectional view showing the main cable 5 in FIG. 1 , and FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 . In the figure, the main rope 5 has a belt-shaped rope main body 11 . The rope main body 11 has seven strands 12 arranged at intervals in the width direction thereof, and a resin covering body 13 integrally covering the strands 12 . Each strand 12 has a plurality of steel primary wires 14 . The original wires 14 are twisted parallel to each other (refer to JIS G 352512.2b). The cross-sectional structure of the strand 12 is preferably the Warrenton (Japanese: ウォリントン) type specified in JIS G 3525.

The covering body 13 is made of, for example, thermoplastic ether-based polyurethane resin. Each sub-string 12 is coated with an adhesive 15 at least on its outer periphery, so that the sub-string 12 and the covering body 13 are connected into one body. That is to say, the strand 12 and the covering body 13 are bonded to each other by the adhesive 15 .

In the portion between the adjacent strands 12 of the covering body 13, a plurality of gaps 13a extending in the longitudinal direction of the elevator rope main body 11 are provided at intervals from each other in the longitudinal direction of the elevator rope main body 11. The gap 13a penetrates the cord main body 11 in the thickness direction. At both end portions in the longitudinal direction of each gap 13a, rounded stress relief portions 13b are provided in cross-sectional shape. Here, the cross section of the stress relief portion 13b is substantially circular.

Between the gaps 13a adjacent to the length direction of the cord main body 11, the connection part 13c which does not provide the gap 13a is formed. In addition, the gaps 13a adjacent to the width direction of the rope main body 11 (the left-right direction in FIG. 4 ) are arranged to be offset from each other by a half pitch in the length direction of the rope main body 11 .

In such an elevator device, between the driving sheave 2, the car suspension sheave 9, and the counterweight suspension sheave, because the main rope 5 is twisted, along with the position of the rope main body 11 in the width direction, the position of the sub-rope 12 is different. The geometrical lengths are different, therefore, the load of the sub-rope 12 also varies with the position of the rope main body 11 in the width direction.

Due to such a difference in load, if the tension on the sub-strings 12 differs, a shearing force will be generated between the adjacent sub-strings 12 of the covering body 13 . Therefore, peeling of the adhesive 15, breakage of the covering body 13, and fatigue breakage of the primary wire 14 of the strand 12 under a heavy load may be caused.

On the contrary, in Embodiment 1, since many gaps 13a have been opened on the covering body 13, the binding force on the sub-string 12 formed by the covering body 13 is reduced, and the sub-string 12 is allowed to go to a certain extent. The movement of the rope main body 11 in the width direction.

Therefore, the peeling of the adhesive 15, the breakage of the covering body 13, and the fatigue fracture of the original wire 14 are suppressed, and the stable strength can be ensured, and the service life can be extended. That is, since damage to a specific strand 12 is not concentrated, the service life of the main rope 5 as a whole can be extended.

In addition, the binding force on the sub-rope 12 produced by the covering body 13 can be easily set by using the distance between the adjacent gaps 13a in the length direction of the rope main body 11, that is, the length of the joint portion 13c.

Furthermore, since the stress relieving portion 13b is provided in the gap 13a, the stress concentration at both ends in the longitudinal direction of the gap 13a is relieved, so that it is possible to suppress cracks and their propagation due to the stress concentration.

In addition, the gaps 13a adjacent to the width direction of the rope main body 11 are arranged to deviate from each other by half a pitch in the length direction of the rope main body 11, so the joints 13c may also be offset from each other in the length direction of the rope main body 11. In this position, the strength can be equalized in the length direction of the rope main body 11 .

[Embodiment 2]

Fig. 5 is a sectional view of an elevator rope according to Embodiment 2 of the present invention. In the covering body 13 in the figure, high-strength fibers 16 as a reinforcing material are uniformly mixed. As the high-strength fiber 16, for example, an aramid (aramid) resin fiber, glass fiber, or the like can be used. As the high-strength fibers 16 , single fibers may be used as they are, or a plurality of single fibers may be aggregated and mixed into the covering body 13 . Other configurations are the same as those of the first embodiment.

By adopting such a structure, the strength of the covering body 13 can be increased, and the reduction of the strength of the covering body 13 caused by the provision of the gap 13a can be prevented. In addition, because the high-strength fiber 16 is used as a reinforcing material, although the tensile strength of the covering body 13 is improved, the reinforcing effect in the shearing direction and the compressing direction is low, which prevents the action of the strand 12 from being inhibited.

[Embodiment 3]

Fig. 6 is a cross-sectional view of an elevator rope according to Embodiment 3 of the present invention, and Fig. 7 is a cross-sectional view along line VII-VII of Fig. 6 . The belt-shaped rope main body 21 in the figure has seven sub-strings 22 arranged at intervals from each other in the width direction of the rope main body 21, and a resin covering body 13 that covers the sub-strings 22 into one piece, and in order to surround the sub-strings 22 And the fabric body 23 embedded in the covering body 13 .

Each sub-rope 22 includes a resin core material 24 extending in the longitudinal direction of the rope main body 21 , and three unit sub-ropes 25 arranged around the core material 24 and twisted with the core material 24 . Each unit strand 25 has a plurality of steel primary wires 26 . The primary wires 26 are twisted parallel to each other.

As the material of the core material 24, for example, thermoplastic resins such as polypropylene resin, polyethylene resin or ethylene, or synthetic resin fibers such as high-strength aramid fibers (aramid fibers) or polypropylene fibers twisted into high-density fibers can be used. s material.

In order to integrate with the covering body 13, an adhesive (not shown) is applied to at least the outer peripheral portion of each unit string 25 .

The fabric 23 may be a material in which high-strength fibers such as aramid resin fibers or glass fibers are woven into a cloth shape. In addition, high-strength fibers can be woven directly from single fibers or aggregates of multiple strands of single fibers. The woven fabric 23 may be arranged only between the adjacent strands 22 .

In the covering body 13, many gaps 13a are provided. In Embodiment 3, the gaps 13a adjacent to each other in the width direction of the rope body 11 are arranged side by side at the same position in the length direction of the rope body 21 .

According to this structure, since the core material 24 and the three unit strands 25 constitute the strand 22, thinner strands 26 can be used and the diameter of the sheave used can be reduced.

In addition, since the cloth body 23 is embedded in the covering body 13, the strength of the covering body 13 can be increased, and the reduction of the strength of the covering body 13 due to the provision of the gap 13a can be prevented. In addition, since the fabric 23 is used as a reinforcing material, although the tensile strength of the covering body 13 is increased, the reinforcing effect in the shearing direction and the compressive direction is low, and the movement of the strand 22 can be prevented from being restrained.

Furthermore, since the gaps 13a are arranged side by side at the same position in the longitudinal direction of the rope main body 21, the fabric 23 is not divided into many small pieces by the gaps 13a, so the reinforcing effect of the fabric 23 can be enhanced.

In the above example, the gap 13a passing through the rope bodies 11, 21 is shown, but it may be made as a hole drilled in only one side of the rope body or as a hollow gap without an opening.

In the above example, the gap 13a is used as the void, but it is also possible to fill the gap with a material different from that of the covering body. But as the material filling in the gap, it is better not to use the material that can hinder the movement of the rope.

The arrangement of the raw wire and the core material constituting the strand is not limited to the arrangement shown in Fig. 3 and Fig. 4, and various changes can be made.

In addition, in the above example, the elevator apparatus of the 2:1 rope ratio system was described, but the elevator rope of the present invention can also be applied to, for example, the elevator apparatus of the 1:1 rope ratio system and other systems. However, it is particularly effective when used in an elevator system in which torsion is generated in the main body of the rope.

Claims (7)

1. A rope for an elevator, which has a belt-shaped rope main body and is used to hang the car of the elevator, characterized in that, The rope main body has a plurality of sub-ropes arranged at intervals in the width direction of the rope main body, and a resin covering body that covers the sub-strings and integrates them. The sub-ropes adjacent to the covering body In the part between the ropes, a plurality of gaps extending along the length direction of the sub-ropes are respectively arranged at intervals in the length direction of the sub-ropes. 2. The elevator rope according to claim 1, wherein stress relief portions having a circular cross-sectional shape are provided at both ends of the gap in the longitudinal direction. 3. The elevator rope according to claim 1, wherein said gaps adjacent to each other in the width direction of said rope main body are arranged so as to deviate from each other by half a pitch in the length direction of said strands. 4. The elevator rope according to claim 1, wherein a high-strength fiber is mixed into the coating as a reinforcing material. 5. The elevator rope according to claim 1, wherein a woven fabric as a reinforcing material is embedded in the covering body. 6. The elevator rope according to claim 5, wherein the said rope main bodies are arranged side by side at the same position in the longitudinal direction of said rope main bodies in the gaps adjacent to each other in the width direction of said rope main bodies. 7. An elevator device, comprising: a driving device for driving the sheave; a main cable with a belt-shaped rope main body wound on the driving sheave; The car and the counterweight that are raised and lowered by the driving force of the driving device are characterized in that The driving device, the car, and the counterweight are assembled so as to be able to generate twist on the rope main body, and the rope main body has a plurality of sub-ropes and covering wires arranged at intervals in the width direction of the rope main body. The sub-strings are integrated into a resin covering body, and in the part between the adjacent sub-strings of the covering body, the lengthwise direction of the sub-strings is spaced apart from each other along the length of the sub-strings. A plurality of gaps extending lengthwise of the rope.

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