KR20110127262A - Rope for elevators and process for producing same - Google Patents

Abstract

In an elevator rope, the resin core rope covering body is coat | covered with the outer periphery of the core rope which consists of a fiber bundle. A plurality of steel strands are twisted on the outer circumference of the core rope covering body.

Description

Elevator rope and its manufacturing method {ROPE FOR ELEVATORS AND PROCESS FOR PRODUCING SAME}

TECHNICAL FIELD This invention relates to the elevator rope used for a main rope etc. which hang a car, etc., and its manufacturing method.

In a conventional elevator rope, a plurality of steel strands are twisted on the outer circumference of a core rope made of fiber bundles. In general, the core rope is configured by twisting three core rope strands formed by twisting a plurality of yarns, respectively. In addition, the core rope strands are compression molded from the outer circumference when they are twisted with the steel strands and are densified. Thereby, while the form of a rope is stabilized, the clearance gap between steel strands is hold | maintained suitably (for example, refer patent document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 5-262478

In the conventional elevator rope as described above, in order to stabilize the shape of the rope and to properly maintain the gap between the steel strands, it is required to increase the packing density (mass per unit length) with respect to the diameter of the core rope. In particular, when the rope diameter is increased, the gap in the core rope is increased, and it is difficult to secure the packing density of the core rope while keeping the core rope diameter at a predetermined size. On the other hand, if the core rope strands are to be made larger in diameter to ensure packing density, a large pressing force is required to suppress the rope diameter when the strands are twisted. Or the fiber of the core rope is damaged, and the strength and the service life are impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to obtain an elevator rope and a method for manufacturing the same, which can increase the packing density of the core rope while preventing damage to the core rope or the steel strand even when the rope diameter is large. For the purpose of

The elevator rope according to the present invention includes a core rope made of a fiber bundle, a resin core rope covering body coated on the outer circumference of the core rope, and a plurality of steel strands twisted on the outer circumference of the core rope covering.

Moreover, the manufacturing method of the elevator rope which concerns on this invention is a process which coat | covers the resin core rope coating body on the outer periphery of the core rope which consists of a fiber bundle, and the process of twisting several steel strands on the outer periphery of a core rope coating body. Include.

Moreover, the manufacturing method of the elevator rope which concerns on this invention is a process which coat | covers a core rope strand coating body on the outer periphery of several core rope strands which consist of a fiber bundle, and twists the core rope strand to which the core rope strand coating body was coated, and cores The step of making a rope and passing the core rope through a heated die to integrate the core rope strand coating body which individually covers the core rope strand to form a core rope coating, and to the outer circumference of the core rope coating body Twisting strands of two dogs.

In the elevator rope of the present invention, since the core rope made of fiber bundles is coated with a resin core rope covering, and the steel strands are twisted on the outer circumference thereof, the core rope and the steel strands are damaged even when the rope diameter is large. The packing density of a core rope can be made high, preventing it.

1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention.
It is sectional drawing which shows the state in the middle of manufacture of the elevator rope of FIG.
FIG. 3 is a cross-sectional view of the pressure type die used when extruding the resin coating of FIG. 2. FIG.
4 is a cross-sectional view of one example of a tube type die.
It is sectional drawing which shows the 1st example of the form of the resin coating body in the case of using the tube type die of FIG.
It is sectional drawing which shows the 2nd example of the form of the resin coating body in the case of using the tube type die of FIG.
It is sectional drawing which shows the state in the middle of manufacture of the rope for elevators by Embodiment 2 of this invention.
It is sectional drawing which shows the state in the middle of manufacture of the rope for elevators by Embodiment 3 of this invention.
FIG. 9 is a cross-sectional view illustrating a state in which the core rope of FIG. 8 is passed through a heated die and molded.
FIG. 10: is a side view which shows an example of the elevator apparatus to which the elevator rope of Embodiment 1, 2 or 3 is applied. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated with reference to drawings.

Embodiment 1

1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention. In the figure, a core rope 1 is arranged at the center of an elevator rope (wire rope). The core rope 1 is comprised by twisting three core rope strands 2 mutually and pressing them from an outer periphery. Each core rope strand 2 is comprised by the many yarn which bundles a fiber.

The outer circumference of the core rope 1 is covered with the resin core rope covering 3. As a material of the core rope covering 3, polyethylene, a polypropylene, etc. are used, for example.

A plurality of steel strands 4 (here, eight) are twisted on the outer circumference of the core rope covering 3. Each steel strand 4 is comprised by twisting several steel wire. More specifically, the steel strand 4 is composed of an intermediate layer composed of a core wire disposed at the center, a plurality of intermediate strands twisted on the outer periphery of the core wire, and a plurality of outer strands twisted on the outer periphery of the intermediate layer. It has an outer layer made up of. The diameter of the intermediate element wire is smaller than the diameter of the core wire and the outer wire.

The core rope covering 3 is interposed between the steel strands 4 adjacent to each other. In addition, the core rope covering 3 is interposed between the steel strand 4 and the core rope 1. In addition, a plurality of grooves 1a having a cross-sectional 'V' shape are formed between the core rope strands 2 adjacent to each other on the outer circumference of the core rope 1, and the core rope covering 3 has a groove 1a. ) Is also squeezed into.

Next, the manufacturing method of the elevator rope of FIG. 1 is demonstrated. When manufacturing the elevator rope of FIG. 1, first, as shown in FIG. 2, three core rope strands 2 of circular cross section are twisted with each other, and the core rope coating body 3 is coated on the outer periphery thereof. At this time, the core rope covering 3 is coated on the outer circumference of the core rope 1 by extrusion molding using the pressure type die 5 shown in FIG. 3.

In the center of the press type die 5, the core rope insertion path 5a through which the core rope 1 is inserted is provided. Moreover, the cylindrical resin flow path 5b is provided in the radial direction outer side of the core rope insertion path 5a in the press type die 5. The diameter of the resin flow path 5b is gradually reduced on the downstream side (left side in FIG. 3), and the downstream end of the resin flow path 5b is joined to the core rope insertion path 5a in the pressurizing die 5. . That is, the resin which flowed in the resin flow path 5b is coat | covered on the outer periphery of the core rope 1, being pressurized in the press type die 5. Thereby, resin is filled also in the clearance of the outer periphery of the core rope 1.

On the other hand, when the tube type die (sheath type die) 6 shown in FIG. 4 is used, the resin flow path 6b joins the core rope insertion path 6a in the tube type die 6. Instead, the resin tube (shell) molded from the outside of the tube-type die 6 is covered with the outer circumference of the core rope 1. For this reason, it is difficult to fill resin in the space | interval of the outer periphery of the core rope 1, and the core rope coating body 3 becomes the form shown in FIG. That is, in FIG. 5, the core rope covering body 3 is cylindrical, and in FIG. 6, the core rope covering body 3 is attached to the outer circumference of the core rope 1 with a constant thickness, and both core ropes are attached. The effect of increasing the packing density is small.

After covering the core rope covering body 3 on the outer circumference of the core rope 1, the steel strand 4 is braided. At this time, the core rope 1 is compression-molded from the outer circumference through the core rope covering body 3 to be densified. In addition, the core rope covering body 3 sticks in between the adjacent steel strands 4.

In such an elevator rope, since the core rope covering body 3 is coated on the outer circumference of the core rope 1, the core rope 1 can be compression molded through the core rope covering body 3, and the rope diameter is increased. Even when large, the packing density of the core rope 1 can be made high, preventing damage to the core rope 1 or the steel strand 4.

In addition, since the core rope covering body 3 is filled in the gap of the outer circumference of the core rope 1 without tightening the steel strand 4 more tightly than necessary or deforming the core rope 1. The rigidity of the core rope 1 can be maintained, and the damage of the core rope 1 and the steel strand 4 can also be prevented by this.

In addition, since the core rope cladding 3 deforms and enters between the steel strands 4 and the core rope strands 2, the rigidity is higher and difficult to deform than the core rope of the conventional fiber core alone. The contact pressure of the steel strand 4 and the core rope strand 2 can be reduced, and fretting wear can be reduced.

Furthermore, if the thickness of the core rope covering body 3 is not increased more than necessary, slight cracking occurs in the core rope covering body 3 due to repeated bending, but the lubricant contained in the core rope 1 It is supplied to the steel strand 4 from a clearance, and can maintain a favorable lubrication state.

In addition, in order to supply the lubricating oil contained in the core rope 1 to the steel strand 4, you may provide previously the minute hole in the core rope coating body 3.

Embodiment 2 Fig.

Next, FIG. 7 is sectional drawing which shows the state in the middle of manufacture of the rope for elevators by Embodiment 2 of this invention. In this example, the core rope strand coating body 7 is constructed on the outer periphery of each core rope strand 2, and the core rope is formed on the outer periphery of the core rope 1 formed by twisting the core rope strand 2 on which the coating is formed. The coating body 3 is shape | molded. The core rope strand covering 7 is made of the same resin as the core rope covering 3.

The core rope strand covering 7 is coated on the outer circumference of the core rope strand 2 by extrusion molding using the tube type die 6 as shown in FIG. 4. In addition, the core rope coating body 3 is molded using the press type die 5 as shown in FIG. The other structure is the same as that of Embodiment 1, and the steel strand 4 is twisted by the outer periphery of the core rope coating body 3. As shown in FIG.

Although the core rope 1 is impregnated with lubricating oil, when molded by the pressure type die 5, since the resin pressure acts on the core rope 1, the lubricating oil is extruded from the extruder die portion. Easy to squeeze On the other hand, in the case of the tube-type die 6, since it is the shaping | molding method which coats the shape | molded tube to the core rope strand 2 from the outside of die | dye, lubricating oil is hardly squeezed out at the time of shaping | molding. In addition, since the cross section of the core rope strand 2 has a shape that is closer to a circle than the core rope 1, even when molded with the tube type die 6, the filling density with respect to the diameter is molded with the press type die 5 Almost unchanged. From this configuration, the core rope 1 having increased packing density can be obtained while maintaining the content ratio of the core rope 1.

Embodiment 3:

Next, FIG. 8 and FIG. 9 are sectional drawing which shows the state in the middle of manufacture of the rope for elevators by Embodiment 3 of this invention. In this example, as shown in FIG. 8, the core rope strand coating body 7 is constructed in the outer periphery of each core rope strand 2, and the core rope strand 2 in which the coating was formed is twisted. It is preferable to use the tube type die 6 for forming the core rope strand covering 7 in the same manner as in the second embodiment. Thereafter, the core rope of FIG. 8 is passed through a heated die to be molded into the form shown in FIG. 9. As a result, the core rope strand coverings 7 which individually cover the core rope strands 2 are integrated with each other to form the core rope coverings 3. The other structure is the same as that of Embodiment 1, and the steel strand 4 is twisted by the outer periphery of the core rope coating body 3. As shown in FIG.

Also with such a structure, a core rope with a high packing density and maintaining a content rate can be comprised.

Here, FIG. 10 is a side view which shows an example of the elevator apparatus to which the elevator rope of Embodiment 1, 2 or 3 is applied. In the figure, the machine room 12 is provided in the upper part of the hoist 11. The machine base 13 is installed in the machine room 12. The hoist 14 is supported on the machine base 13. The hoist 14 has a drive sheave 15 and a hoist main body 16. The hoist main body 16 has a hoist motor for rotating the drive sheave 15 and a hoist brake for braking the rotation of the drive sheave 15.

On the machine table 13, a deflecting sheave 17 is mounted. The drive sheave 15 and the deflecting sheave 17 are wound with a plurality of elevator ropes 18 as suspension means. The deflecting sheave 17 is wound around the counterweight 20 rather than the drive sheave 15 of the elevator rope 18.

A car 19 is suspended from one end of the elevator rope 18. That is, the car 19 is suspended in the hoistway 11 by the elevator rope 18 on one side of the drive sheave 15. The counterweight 20 is suspended on the other end of the elevator rope 18. That is, the counterweight 20 is suspended by the elevator rope 18 on the other side of the drive sheave 15.

In the hoistway 11, a pair of car guide rails 21 for guiding the lifting and lowering of the car 19 and a pair of counterweight guide rails 22 for guiding the lifting and lowering of the counterweight 20 are provided. . The car 19 is equipped with an emergency stop device 23 which meshes with the car guide rail 21 to emergency stop the car 19.

In addition, the type of the elevator apparatus to which the elevator rope of this invention is applied is not limited to the type of FIG. For example, the present invention can be applied to an elevator without a machine room, an elevator device of a 2: 1 roping system, an elevator device of a multi-car system, or a double deck elevator.

Claims (9)

Core rope consisting of fiber bundles,
Core rope covering made of resin coated on the outer circumference of the core rope
An elevator rope comprising a plurality of steel strands twisted around the core rope covering body. The method according to claim 1,
And the core rope covering is gripped between the steel strands adjacent to each other. The method according to claim 1,
The core rope has a plurality of core rope strands twisted with each other,
A plurality of grooves having a 'V' shape in cross section are formed between the core rope strands adjacent to each other on the outer circumference of the core rope.
And said core rope covering is enclosed in said groove. The method according to claim 1,
The core rope has a plurality of core rope strands twisted with each other,
An elevator rope in which a core rope strand covering body made of resin is coated on an outer circumference of the core rope strands. Coating a resin core rope coating body on the outer circumference of the core rope made of fiber bundles; and
An elevator rope manufacturing method comprising a step of twisting a plurality of steel strands on the outer circumference of the core rope covering. The method according to claim 5,
Coating of the said core rope coating body with the said core rope is a manufacturing method of the rope for elevators performed by extrusion molding using a press type die. The method according to claim 5,
The core rope is coated with a core rope strand coating member on the outer circumference of a plurality of core rope strands each made of fiber bundles, and then the core rope strand coated with the core rope strand coating member is configured to twist the core rope strands together. . Coating a core rope strand coating member on the outer circumference of a plurality of core rope strands each made of a fiber bundle,
Twisting the core rope strand coated with the core rope strand coating member to form a core rope,
By passing the core rope through a heated die, the step of integrating the core rope strand coating body which has individually covered the core rope strand to form a core rope coating body, and
An elevator rope manufacturing method comprising the step of twisting a plurality of steel strands on the outer circumference of the core rope covering. The method according to claim 7 or 8,
Coating of the said core rope strand coating body with the said core rope strand is performed by extrusion molding using a tube type die.

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