WO2018073897A1

WO2018073897A1 - Rope for elevator, and elevator device

Info

Publication number: WO2018073897A1
Application number: PCT/JP2016/080861
Authority: WO
Inventors: 光井　厚
Original assignee: 三菱電機株式会社
Priority date: 2016-10-18
Filing date: 2016-10-18
Publication date: 2018-04-26
Also published as: JPWO2018073897A1; JP6576575B2; KR102168962B1; CN109803912B; CN109803912A; KR20190039814A

Abstract

This rope for an elevator is provided with a core and a plurality of outer layer strands twisted around the outer periphery of the core. Each of the outer layer strands has: a center wire; a center wire coating made from a resin and coated on the outer periphery of the center wire; an intermediate element wire layer comprising a plurality of intermediate element wires made from steel, which are twisted together around the outer periphery of the center wire coating; and an outer-layer element wire layer comprising a plurality of outer-layer element wires made from steel, which are twisted together around the outer periphery of the intermediate element wire layer.

Description

Elevator rope and elevator equipment

The present invention relates to an elevator rope having a plurality of outer layer strands twisted around the outer periphery, and an elevator apparatus using the same.

In the conventional elevator apparatus, it is required to reduce the hoisting machine by reducing the sheave diameter and to save space. In order to cope with this, a rope having a small cross-sectional diameter may be used, or a flat belt may be used instead of the rope.

However, when ropes with a small diameter are used, the number of ropes increases, causing problems such as effects on other equipment, an increase in the time for hanging the rope, and an increase in maintenance inspection time.

On the other hand, as a method of reducing the bending stress acting on the rope without extremely reducing the diameter of the rope, the number of strands included in the rope is increased or the number of strands constituting the strand There is a method of reducing the diameter of the strands by increasing the number (for example, see Patent Documents 1 and 2).

Furthermore, ropes using filler type strands are known as a structure that reduces the number of strands constituting the strands to 25 or less while reducing the diameter of the outer strands constituting the strands and reducing bending stress. It has been.

Furthermore, a rope in which a fiber core is arranged at the center and a plurality of seal type strands are twisted around the outer periphery of the fiber core is also known.

Japanese Patent No. 4296152 Japanese Patent No. 5307395

Among the conventional ropes as described above, a rope with an increased number of strands or strands has a problem that the facilities constituting the ropes and the strands become special and productivity deteriorates. Furthermore, in the method of increasing the number of strands, there is a problem that the metal portion included in the entire rope, that is, the cross-sectional area of the strand is reduced, and the breaking strength of the rope itself is reduced.

Also, in the rope using filler type strands, the filler wire in the strands that make up the strand is very thin, so when applied to a rope with a small diameter, the filler wire may break during manufacture or the filler wire during use There was concern that the shape of the lasso would be lost as a result of wear.

Moreover, in the strand using a fiber core, there exists a subject that the cross-sectional area of the steel wire part of the whole strand will fall. Furthermore, when subjected to repeated bending, the fiber core may be deformed or worn, and there is a concern that the shape of the lasso may be lost.

The present invention has been made to solve the above-described problems, and provides an elevator rope that can be easily manufactured and that can prevent a decrease in breaking strength and a collapse of the shape of a lasso, and an elevator apparatus using the same. For the purpose.

The elevator rope according to the present invention includes a core body and a plurality of outer layer strands twisted around the outer periphery of the core body, and each outer layer strand is covered with a center line and an outer periphery of the center line. A resin-made center line covering, an intermediate strand layer made of a plurality of steel intermediate strands twisted around the outer periphery of the center line covering, and a twisted outer periphery of the intermediate strand layer A plurality of steel outer layer strands.
An elevator apparatus according to the present invention includes a hoisting machine having a driving sheave, a core body, and a plurality of outer layer cords twisted around the outer periphery of the core body, and is wound around the driving sheave. Elevator rope that is hung, and a car that is suspended by the elevator rope, each outer layer cord is a center line and a resin center line covering that is coated on the outer periphery of the center line, An intermediate strand layer composed of a plurality of steel intermediate strands twisted around the outer periphery of the center wire covering, and a plurality of steel outer layer strands twisted around the outer periphery of the intermediate strand layer And an outer element wire layer.

According to the present invention, it is possible to obtain an elevator rope that is easy to manufacture and can prevent a decrease in breaking strength and collapse of a lasso, and an elevator apparatus using the same.

It is sectional drawing of the rope for elevators by Embodiment 1 of this invention. It is sectional drawing of the rope for elevators by Embodiment 2 of this invention. It is a block diagram which shows the elevator apparatus using the rope for elevators of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention, showing a cross section orthogonal to the length direction. In the figure, the elevator rope has a fiber core 1 as a core body and a plurality of outer layer cords 2 twisted around the outer periphery of the fiber core 1. In this example, eight outer layer strands 2 are used. The fiber core 1 is configured by twisting fibers together.

Each outer layer strand 2 includes a steel center line 3, a center line covering 4 of a resin wire coated on the outer periphery of the center line 3, and an intermediate strand provided on the outer periphery of the center line covering 4 It has a layer 5 and an outer strand layer 6 provided on the outer periphery of the intermediate strand layer 5. As the material of the center line covering 4, a thermoplastic resin such as polyethylene or polypropylene is used. The center line 3 and the center line covering 4 constitute a covering core.

The intermediate strand 5 is composed of a plurality of steel intermediate strands 7 twisted around the outer periphery of the centerline covering 4. The outer layer strand 6 is composed of a plurality of steel outer layer strands 8 twisted around the outer periphery of the intermediate strand layer 5. In this example, the intermediate strand layer 5 is constituted by 12 intermediate strands 7, and the outer strand layer 6 is constituted by 12 outer strands 8. Further, the intermediate strand 7 and the outer layer strand 8 have a configuration in which both twist lengths are the same, that is, a so-called parallel twist configuration.

The diameter of the center line 3 is equal to or less than the diameter of the outer layer strand 8 and is larger than the diameter of the intermediate strand 7. The diameter of the intermediate strand 7 is smaller than the diameter of the intermediate strand 7 and the diameter of the outer layer strand 8.

In such an elevator rope, the diameter of the intermediate strand 7 and the outer strand 8 is made small and the number of strands constituting each outer strand 2 is reduced by the configuration of a commonly used 8-strand rope. It can be up to 25. For this reason, as a strand wire machine which manufactures the outer layer cord rope 2, the equipment which manufactures a general rope for elevators can be used.

Also, unlike the filler type, since it does not include extremely thin strands, that is, filler wires, there is no concern that the filler wires will be cut during manufacture, especially when the rope has a small diameter, and the filler wires will wear out during use.

Furthermore, for example, when a commonly used rope of 8 × S (19) and diameter d = 10 mm (outer layer wire diameter δ = 0.66 mm) is combined with a sheave having a diameter D = 400 mm, that is, D When / d = 40, the strain when subjected to bending by the sheave is 0.66 / 400 = 1.65 × 10 ⁻³ .

On the other hand, in the elevator rope of the first embodiment, δ = 0.52 mm, and the strain when subjected to bending by a sheave having the same diameter of 400 mm is 0.52 / 400 = 1.3 × 10 ^−3. It becomes. For this reason, 1.3 / 1.65 = 0.78 (= about 80%), and the distortion is reduced by about 20%. Thereby, a bending stress can be reduced and the bending fatigue property as a rope can be improved.

Furthermore, when the fiber core is disposed at the center of the outer layer cord 2, since there is a gap between the fibers, the fiber core is easily deformed with respect to the pressure from the outer periphery, and there is a concern about deformation due to secular deformation and wear. . On the other hand, in the elevator rope of the first embodiment, since the coated core in which the center line 3 is coated with the resin center line covering 4 is used, the cross-sectional area of the steel wire portion is increased and the aging is used It is possible to configure the outer layer cord 2 that is not easily deformed.

Embodiment 2. FIG.
2 is a sectional view of an elevator rope according to Embodiment 2 of the present invention. In the second embodiment, a center line 9 made of synthetic fiber and having conductivity is used in each outer layer cord 2. The center line 3 is constituted by, for example, a bundle of carbon fibers or a stranded wire of carbon fibers.

FIG. 3 is a block diagram showing an elevator apparatus using the elevator rope of FIG. A machine room 22 is provided above the hoistway 21. A hoisting machine stand 23 is installed in the machine room 22. A hoisting machine 24 is supported on the hoisting machine base 23. The hoisting machine 24 has a drive sheave 25 and a hoisting machine main body 26. The hoisting machine main body 26 has a hoisting machine motor that rotates the driving sheave 25 and a hoisting machine brake that brakes the rotation of the driving sheave 25.

A suspension 27 is wound around the drive sheave 25. As the suspension body 27, a plurality of elevator ropes of the second embodiment arranged in parallel are used.

A car 28 is connected to the first end of the suspension 27. A counterweight 29 is connected to the second end of the suspension body 27. The car 28 and the counterweight 29 are suspended in the hoistway 21 by the suspension body 27 and are moved up and down by rotating the drive sheave 25.

In the hoistway 21, a pair of car guide rails 30 that guide the raising and lowering of the car 28 and a pair of counterweight guide rails 31 that guide the raising and lowering of the counterweight 29 are installed.

The car 28 includes a car frame 32 to which the suspension body 27 is connected, and a car room 33 supported by the car frame 32.

In the machine room 22, a control device 34 and an energization device 35 are installed. The control device 34 controls the operation of the car 28. The energization device 35 has a power source, a detector, and a resistor, and energizes the center line 9 of each elevator rope. The control device 34 and the power supply device 35 are connected to the car 28 via a control cable 36.

Suppose that two of the eight center lines 9 included in each elevator rope are

center lines

9a and 9b, the

center lines

9a and 9b are short-circuited at the end on the counterweight 29 side. That is, the two

center lines

9a and 9b are connected in series. The

center lines

9 a and 9 b are drawn from the elevator rope at the end on the car 28 side, and are connected to the power supply device 35 via the control cable 36.

Although not shown, the remaining six of the eight center lines 9 included in each elevator rope are short-circuited by two at the end on the counterweight 29 side, and the end on the car 28 side is short-circuited. It is connected to the energization device 35 via the control cable 36.

The energizing device 35 detects whether or not a current flows through the center line 9. The control device 34 determines whether or not the outer layer strand 2 is broken by checking the conduction state of the center line 9. That is, when the current is interrupted, it is determined that the center line 9 is broken, and it is determined that the outer layer rope 2 including the center line 9 is broken.

Further, the control device 34 determines whether or not the service of the elevator device can be continued depending on whether or not the outer layer cord 2 is broken. For example, the control device 34 continues the service when the rupture of the outer layer strand 2 is not detected, and stops the service when the rupture of the outer layer strand 2 is detected.

In such an elevator rope and an elevator apparatus, by energizing the center line 9 and constantly monitoring the conduction state, it is possible to quickly detect the breakage of the outer strand 2 and improve safety.

Moreover, since the center line 9 is covered with the resin center line covering 4, the intermediate strand 7 and the center line 9 do not directly rub against each other even when subjected to repeated bending. Fiber damage can be prevented.

In the above example, two center lines 9 are connected to each other, but four or more center lines 9 may be connected in series and energized.
In the above example, all the center lines 9 of all the elevator ropes are energized, but there is a method of energizing only some of the center lines 9 as a sample.
Further, in the above example, the method of always energizing the center line 9 is shown, but there is also a method of connecting and energizing the energizing device 35 only during maintenance and energizing only during maintenance.
Furthermore, the core is not limited to a fiber core.
Further, the number of outer layer strands, the number of intermediate strands, and the number of outer layer strands are not limited to the above example.

Furthermore, the layout of the whole elevator apparatus to which the elevator rope of the present invention is applied is not limited to FIG.
Furthermore, the type of the elevator apparatus to which the elevator rope of the present invention is applied is not limited to the type shown in FIG. For example, the present invention can be applied to a machine room-less elevator, a 2: 1 roping type elevator device, a multi-car type elevator device, or a double deck elevator.
The elevator rope of the present invention can also be applied to ropes other than ropes for suspending the car 28, such as compen- sion ropes or governor ropes.

Claims

A core body, and a plurality of outer layer ropes twisted around the outer periphery of the core body,
Each outer layer cord is
The centerline,
A resin-made centerline covering that is coated on the outer periphery of the centerline;
An intermediate strand layer composed of a plurality of steel intermediate strands twisted around the outer periphery of the centerline covering;
An elevator rope comprising: an outer layer strand composed of a plurality of steel outer strands twisted around the outer periphery of the intermediate strand layer.
The elevator rope according to claim 1, wherein a diameter of the center line is equal to or less than a diameter of the outer layer strand.
The elevator rope according to claim 1 or 2, wherein the total number of the center line, the intermediate strand and the outer strand is 25 or less.
The elevator rope according to any one of claims 1 to 3, wherein the center line is made of synthetic fiber.
The elevator rope according to any one of claims 1 to 4, wherein the center line has conductivity.
A hoisting machine having a drive sheave,
A core body, and a plurality of outer layer strands twisted around the outer periphery of the core body, the elevator rope wound around the drive sheave, and the elevator rope With a basket
Each outer layer cord is
The centerline,
A resin-made centerline covering that is coated on the outer periphery of the centerline;
An intermediate strand layer composed of a plurality of steel intermediate strands twisted around the outer periphery of the centerline covering;
And an outer wire layer comprising a plurality of steel outer wire wires twisted around the outer periphery of the intermediate wire layer.
The elevator apparatus according to claim 6, wherein the center line has conductivity.
A control device, and an energization device for energizing at least a part of the center line,
The said control apparatus is an elevator apparatus of Claim 7 which determines the presence or absence of the fracture | rupture of the said outer layer strand by confirming the conduction | electrical_connection state of the said centerline.
The elevator device according to claim 8, wherein the control device determines whether or not the service can be continued according to whether or not the outer layer strand is broken.