KR20050105523A - Elevator rope and elevator device - Google Patents

Abstract

An elevator rope for suspending the car of an elevator device, comprising an inner layer rope having a plurality of inner layer strands formed of a plurality of steel wires twisted each other, a resin inner layer covering body covering the outer periphery of the inner layer rope, and an outer layer disposed on the outer peripheral part of the inner layer covering body, the outer layer further comprising a plurality of outer layer strands formed of a plurality of steel wires twisted each other, wherein the outer layer covering body formed of a high friction resin material is applied onto the outer periphery of the outer layer.

Description

Elevator ropes and elevator devices {ELEVATOR ROPE AND ELEVATOR DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator rope for use in an elevator, and an elevator device using the rope.

In a conventional elevator apparatus, a pulley having a diameter of 40 times or more of a rope diameter is used to prevent premature wear or breakage of the rope. Therefore, in order to reduce the diameter of the pulley, it is necessary to reduce the diameter of the rope. However, when the rope diameter is reduced, the car may easily vibrate due to load fluctuations loaded on the car or loads of passengers ascending and descending, or the vibration of the rope in the pulley may be transmitted to the car. Moreover, the number of ropes increases and the structure of an elevator apparatus becomes complicated. Moreover, when the diameter of the drive pulley was made small, the driving friction force fell and it was necessary to increase the weight of the car.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an elevator rope capable of achieving a small hardness while maintaining high strength, long life and high friction, and a compact layout elevator device using the rope The purpose is to get.

The elevator rope according to the present invention is installed in an inner layer rope having a plurality of inner strands in which a plurality of steel wires are twisted together, an inner layer covering made of a resin covering the outer circumference of the inner layer rope, and an outer circumference of the inner layer covering. And an outer layer having a plurality of outer layer strands in which a plurality of steel wires are twisted, and a high friction resin material, and having an outer layer covering body covering the outer periphery of the outer layer.

Moreover, the elevator apparatus by this invention has a hoistway, a motor, the drive pulley rotated by this motor, the drive apparatus arrange | positioned at the upper part of a hoistway so that the rotating shaft of a drive pulley may extend perpendicularly, An inner layer rope having a plurality of twisted inner layer strands, an inner layer covering made of resin covering the outer circumference of the inner layer rope, and a plurality of outer layers provided with a plurality of steel wires twisted on the outer circumference of the inner layer covering. An outer layer having a strand and a high friction resin material, and an outer layer covering member covering the outer periphery of the outer layer, the elevator rope wound around the drive pulley, the car hanging on the hoistway by the elevator rope, and lifting the car by the driving device. And a car side guide car and a hoistway arranged on the counterweight and the hoistway to guide the elevator rope extending from the drive pulley to the car. And a counterweight guide car for guiding the elevator rope extending from the drive pulley to the counterweight, wherein the driving device, the car side guide car and the counterweight guide car are arranged to overlap the car in the vertical projection surface, and the car side guide car and The diameter of the balancing guess guide car is 15 times or more and 30 times or less of the diameter of an elevator rope.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1.

1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the elevator rope of FIG. 1 broken by floor.

In the figure, the inner layer rope 1 has a core rope 2 and a plurality of inner layer strands 3 provided on the outer circumferential portion of the core rope 2.

The core rope 2 has a plurality of core strands 4. Each core strand 4 is comprised by twisting several steel wire 5 together. The core strands 4 are twisted with each other, and the inner layer strands 3 are twisted in the opposite direction to the core strands 4.

The inner layer strands 3 are configured by twisting a plurality of steel wires 6 together. The cross-sectional structure of the inner strand 3 is a Warrington-type (JIS G 3525). In addition, gaps exist between the adjacent core strands 4 and between the core strands 4 and the inner layer strands 3, but these gaps disappear or become smaller by applying tension to the elevator rope during use.

The diameter of the inner layer rope 1 is set to 1/27 or less of the diameter of the pulley to apply, ie, the pulley to which this elevator rope hangs.

A resin inner layer cover 7 is coated on the outer circumference of the inner layer rope 1.

The inner layer covering 7 was made of polyethylene resin, for example.

The outer layer 8 is provided in the outer peripheral part of the inner layer cover 7. The outer layer 8 has a plurality of outer layer strands 9.

Each outer layer strand 9 consists of the center element wire 10 arrange | positioned at the center, and the six outer periphery element wires 11 arrange | positioned at the outer periphery of the center element wire 10. As shown in FIG.

The outer strand 9 is twisted in the opposite direction to the inner strand 3.

The outer cover 12 is coated on the outer circumference of the outer layer 8. The outer layer covering 12 is made of a high friction resin material having a friction coefficient of 0.2 or more, for example, polyurethane resin.

The diameters of all the wires (5.6, 10, 11) are set to 1/400 or less of the diameter of the pulley to be applied, that is, the pulley to which the elevator port hangs.

In such an elevator rope, a steel core rope 2 is disposed at the center, and an outer layer strand 9 having a diameter smaller than that of the inner layer strand 3 is disposed at the outer circumference of the core rope 2, While reducing the diameter, the mounting density of the steel wires 5, 6, 10, and 11 can be increased, and high strength can be achieved.

Moreover, since the inner layer coating body 7 made of resin is arrange | positioned between the inner layer rope 1 and the outer layer 8, the inner layer strand 3 and the outer layer strand 9 are prevented from directly contacting and rubbing, It is possible to prevent the deterioration due to abrasion, to alleviate the bending stress by the buffering action, and to increase the service life of the elevator rope.

Moreover, since the outer layer covering body 12 is arrange | positioned in the contact part with a pulley (not shown), it can also prevent that the outer layer strand 9 wears by direct contact with a pulley. In addition, the bending stress generated when the element wires 10 and 11 are pressed by the pulley in the outer layer strand 9 can be alleviated, and the life span of the elevator rope can be extended, and the small diameter can be achieved.

In addition, since the outer layer covering body 12 is disposed at the outermost circumference, wear of the pulley side can be prevented, and the degree of freedom in selecting the wires 10 and 11 of the outer layer strand 9 and the pulley can be improved. Therefore, the strength as a whole can be made higher, and the pulley can be constructed at low cost.

Moreover, since the outer layer coating body 12 which contacts the drive pulley is comprised by high friction resin materials, such as a polyurethane resin, for example, even if it is small in the case of a drive pulley, sufficient drive force transmission efficiency can be ensured. Therefore, it is not necessary to increase the weight of the car in order to increase the friction force between the elevator rope and the drive pulley, or to add a guide car to increase the winding angle of the elevator rope to the pulley. The configuration is not complicated.

Here, as the high friction resin, a friction coefficient of 0.2 or more is suitable, and sufficient transmission force transmission efficiency can be ensured.

In addition, although the polyurethane resin can be freely selected from soft to hard, it is most suitable to use a rigid polyurethane resin of 90 degrees or more to secure wear resistance against micro slip on the pulley surface. Moreover, in order to prevent the hydrolysis which arises in a use environment, the ether resin is preferable rather than the ester system.

As the material of the inner layer cover 7, the bending resistance can be reduced by selecting a material that tends to be smooth when the elevator rope is bent by a pulley. In addition, the inner layer cover 7 needs hardness not to be crushed between the element wires 6 of the inner layer strands 3 and the element wires 11 of the outer layer ropes 1. As such a material, a low friction hard polyethylene material is suitable.

In addition, the inner layer coating member 7 does not require a large coefficient of friction as compared with the outer layer coating member 12, and does not necessarily require excellent elongation characteristics because the bending caused by the pulley is not large. Therefore, you may use resin, such as nylon, a silicone, a polypropylene, or polyvinyl chloride, as a material of the inner layer cover 7. By using such an inner layer covering 7, it is possible to suppress the deterioration of the life when using the inner layer rope 1 made of steel.

In addition, since the outer layer strand 9 has a simple seven element structure including the center element wire 10 and six outer element wires 11, the diameter of the elevator rope can be reduced, and the shape is not deformed. It is possible to easily coat the cover 12.

In addition, since the cross-sectional structure of the inner layer strands 3 is not in the form of yarns or fillers, but in the form of Warrington, it is possible to prevent disconnection of the wires 6 due to abrasion without using the extremely thin wires 6. The long life can be achieved. Moreover, in order to achieve long life, it is suitable that the element wire 6 of the inner layer strand 3 is a parallel twist rather than a cross twist. At this time, the number of element wires 6 located at the outer circumferential portion is equal to or the same as the number of element wires 6 positioned at the inner side thereof, and the element wires 6 can be arranged in a balanced manner without difficulty. Wear can be further prevented.

In addition, in the elevator rope of a multi-layer structure, a rotational torque in the direction in which the twist is returned due to the tension caused by the load or the repeated bending caused by the pulley is generated inside, and thus the balance between the layers supporting the load is disturbed, thus cutting strength. In addition, the service life decreases, and there is a fear that the adhesive force between the coverings 7 and 12 decreases.

On the other hand, by twisting the inner layer strands 3 in the opposite direction to the core strands 4 and twisting the outer layer strands 9 in the opposite directions to the inner layer strands 3, it is possible to balance the internal torque of the whole rope. The torque for returning the twist can be reduced.

In addition, in the case where the highly flexible elevator rope is fastened on a pulley of a small diameter as described above, when the outer cover 12 is damaged, the contact pressure between the pulley and the outer layer strand 9 increases, and the pulley and the outer layer strand ( There is a fear that the wear of 9) may proceed remarkably.

For this reason, when applying to a pulley having a diameter 20 times the diameter of the elevator rope, it is appropriate to set the number of outer layer strands 9 to 12 or more (21 in FIG. 12). In addition, when applying to a pulley having a diameter of 15 times the diameter of the elevator rope, it is appropriate to set the number of outer layer strands 9 to 16 or more.

Thereby, if the outer layer coating body 12 is to be damaged, the contact pressure between the pulley and the outer layer strands 9 can be suppressed from being increased, and the wear and tear of the pulley and the outer layer strands 9 can be suppressed. Therefore, the material of the pulley does not have to be particularly expensive, and the pulley can be configured at low cost.

In the rope without the outer layer covering 12, the service life is determined by the repeated number of times between the tension and the bending stress due to the pulley, and disconnection occurs first from the wire on the rope surface. In addition, in the rope using the outer layer covering 12, the contact pressure with the pulley is reduced, so that the internal wire is not easily broken but is easily broken due to bending fatigue.

According to the test studies of the inventors, the average lifespan due to such bending fatigue was found to be in a relationship represented by the following equation.

<Life calculation formula>

Calculation formula for disconnecting wires in contact with pulleys

Life expectancy Nc = 10.0 × k × 1.05 ^{D / d}

Calculation formula for disconnecting wires inside rope

Life expectancy Nn = 19.1 × k × 1.05 ^{D / d}

k is a coefficient determined by rope structure and rope strength

Here, the D / d value for obtaining the average lifetime Nn equal to the Nc value when D / d = 40 is 26.7. Therefore, when trying to ensure the service life of the conventional elevator rope applied condition, that is, when D / d = 40, the diameter of the inner layer rope 1 should be 1/27 or less of the pulley diameter. In other words, a pulley of 27 times the diameter of the inner layer rope 1 should be used.

In the elevator rope, the diameters of all the wires 5, 6, 10, and 11 are set to 1/400 or less of the diameter of the pulley to which the pulley is applied. There is no damage.

Embodiment 2.

Next, FIG. 3 is sectional drawing of the elevator rope by Embodiment 2 of this invention. In the figure, the inner layer rope 21 is a core rope covering body 22 coated on the outer circumference of the core rope 2 and the core rope 2 and a plurality of inner layer strands 3 provided on the outer circumference of the core rope 22. Has) Lubricating oil is applied to the element wire 5 of the core strand 4 and the element wire 6 of the inner layer strand 3. The other configuration is the same as that of the first embodiment.

In such an elevator rope, since lubricating oil is applied to the core strand 4 and the inner layer rope 3 of the inner layer rope 21, it is possible to prevent disconnection due to wear of the wires 5 and 6 of the inner layer rope 21. It can achieve long life. Moreover, since the inner layer coating body 7 is provided in the outer periphery of the inner layer rope 21, the outflow of the outer layer 8 of lubricating oil is prevented, and the adhesiveness of the outer layer strand 9 and the outer layer coating body 12 can be ensured. There is a number.

In addition, since the core rope covering body 22 is coated on the outer circumference of the core rope 2, wear caused by contact between the core rope 2 and the inner layer strands 3 can be prevented.

Embodiment 3.

Next, FIG. 4 is sectional drawing of the rope for elevators by Embodiment 3 of this invention. In the figure, the inner layer rope 23 has a core rope 24 and a plurality of inner layer strands 25 provided on the outer circumferential portion of the core rope 24. The core rope 24 has a plurality of core strands 26. Each core strand 26 is configured by twisting a plurality of forced wires 27 with each other.

The inner layer strands 25 are constructed by twisting a plurality of steel wires 28 together. The cross section of the element wire 28 of the inner layer strand 25 is deformed by compressing the inner layer strand 25 from the outer circumference.

The cross section of the element wire 27 of the core strand 26 is deformed by compressing from the outer periphery of the core strand 26. The other configuration is the same as that of the first embodiment.

In the rope for elevators of this type, when the inner layer strands 25 and the core strands 26 are manufactured, they are wound about 5% larger than the finish diameter, and then passed through a die having a finish diameter, so that the wires are not separated from each other in the plane or line. Contact. Thereby, the mounting density of the element wires 27 and 28 can be raised. In addition, the contact pressure between the element wires 27 and the element wires 28 is reduced, and wear of the element wires 27 and 28 is suppressed.

In addition, breakage of the form of the inner layer strands 25 and the core strands 26 is prevented, and the service life is extended.

Embodiment 4.

Next, FIG. 5 is sectional drawing of the elevator rope by Embodiment 5 of this invention. In the figure, an outer layer covering body 12 enters between outer layer strands 9 adjacent to each other. The depth d of the outer layer covering 12 from the surface of the outer layer 8 is larger than the radius of the outer layer rope 9, for example. In addition, the depth d entered, for example, increases the temperature of the resin, which is the material of the outer layer cover 12 at the time of forming the outer layer cover 12, pressurizes and injects the die inside the coating, or from the inside of the rope. It can adjust by pulling out in a vacuum. The other configuration is the same as that of the second embodiment.

In this type of elevator rope, since the outer layer covering body 12 is deeply inserted between the outer layer strands 9 adjacent to each other, the outer layer strands 9 are prevented from moving or contacting each other, and the outer periphery of the outer layer strands 9 is prevented. Wear of the element wire 11 and deformation of the shape of the outer layer strand 9 are prevented. As a result, the service life of the elevator rope can be extended.

Embodiment 5.

In the fourth embodiment, the outer layer covering body 12 is sandwiched between the outer layer strands 9, or, for example, the inner layer covering body 7 is sandwiched between the outer layer strands 9 as shown in FIG. You can put it in.

In addition, the inner layer cover 7 may be sandwiched between the inner layer strands 3 adjacent to each other.

Further, the core rope sheath 22 may be inserted between the inner layer strands 3 adjacent to each other or between the core strands 4 adjacent to each other.

Embodiment 6.

Next, FIG. 7: is sectional drawing of the principal parts of the elevator rope by Embodiment 6 of this invention. In the figure, the outer circumference of the outer layer strand 9 is covered with a rope coating 29 made of the same material as the outer layer coating 12. The other configuration is the same as that of the first embodiment.

In such a rope for an elevator, the rope coating 29 is formed in the outer periphery of the outer layer strand 9 at the time of manufacture of the outer layer strand 9. Since the rope coating 29 is made of the same material as the outer coating 12, the rope coating 29 is excellent in adhesion with the outer coating 12. Thus, the outer layer strands 9 are firmly fixed to the outer layer covering body 12 through the rope covering body 29, and peeling from the outer layer covering body 12 of the outer layer strands 9 is prevented. In addition, when the outer layer strand 9 is manufactured during the production of the outer layer strand 9, rust is prevented during the storage period until the outer layer strand 9 is used in the next step, and stable quality can be ensured.

Embodiment 7.

Next, FIG. 8 is a side view of the elevator rope according to Embodiment 7 of the present invention broken down and displayed for each floor. In the figure, the inner layer strands 3 are in direct contact with the outer circumferential surface of the core rope 2. The number of strands (eight here) of the core strand 4 located in the outer peripheral part of the core rope 2 is equal to the number of strands (eight here) of the inner layer strand 3. The core strands 4 are twisted with each other, and the inner layer strands 3 are twisted in the same direction as the core strands 4.

The other configuration is the same as that of the first embodiment.

In such an elevator rope, since the number of strands and the twisting directions of the inner layer strands 3 and the core rope 4 which are in contact with each other are the same, the inner layer strands 3 and the core strands 4 do not intersect and come into contact with each other. The core strand 4 can be arrange | positioned evenly with respect to (3). Therefore, the damage by the abrasion of the inner layer strand 3 and the core strand 4 can be suppressed, and long life can be aimed at. Moreover, in this case, although the torque which loosens the twist of the inner layer strand 3 and the core strand 4 is added, if the twist pitch of the inner layer strand 3 and the core strand 4 is made long, the inner layer strand 3 and the core strand will be added. The total torque which loosens the twist of (4) can be suppressed, and the balance with the torque which loosens the twist of the outer layer strand 9 can be implement | achieved.

Moreover, in embodiment 1-7, the intensity | strength of the outer layer 8 which added the intensity | strength of each outer layer strand 9 is most suitably set within 20% of the strength of the whole rope for elevators.

Thereby, even when the outer layer strand 9 with the largest bending stress is disconnected, only 80% of the remaining strength can be ensured with the inner layer rope 1, and the reliability can be improved.

Moreover, the rope of the multilayered structure shown in Embodiment 1-7 has the characteristic that the load burden rate of each layer changes with fatigue with time. Depending on the rope's structure, it reduces the strength burden of the layer where damage progresses.

That is, by setting the strength of one layer to 20 to 80%, it is most suitable to detect and replace the abnormality of the weakest layer before the overall strength is significantly lowered.

For example, the strength obtained by adding up the strengths of the outer layer strands 9, which is the weakest layer having the greatest bending stress, is most preferably set within 20% of the strength of the entire elevator rope. Thereby, even when the outer layer strands 9 are disconnected, the remaining strength close to 80% can be ensured only by the inner layer rope 1, and the reliability can be improved.

In this case, if the outer wire 11 of the outer strand 9 is twisted by repulsive twisting rather than pre-form (i.e., non-repulsive twisting), disconnection Is easy to detect. That is, when the outer peripheral line 11 is disconnected, the disconnected part floats and protrudes out of the outer layer covering 12. Therefore, the disconnection of the outer periphery element wire 11 can be visually confirmed, the life of the whole rope can be judged more accurately, and the reliability can be improved. In addition, since it is not necessary to use a defect detection device or the like for inspecting the disconnection state, the maintenance cost can be reduced.

In addition, when the core strand 4 of the inner layer rope 1 is not coated or when the core strand 4 of the inner layer rope 1 is not deformed or has a shorter life than the outer layer strand 9, the strength of the inner layer rope 1 is entirely increased. It is effective to make the outer layer strand 9 into a preform at 20%.

Embodiment 8.

Next, FIG. 10 is a front view of the outline which shows the elevator apparatus by Embodiment 8 of this invention, and FIG. 11 is a top view which shows the elevator apparatus of FIG. In the drawing, the support 32 is fixed to the upper portion of the hoistway 31. On the support base 32, a thin drive device 33 is mounted. The drive device 33 has a motor 34 and a drive pulley 35 that is rotated by the motor 34. Moreover, the drive shaft 33 is arrange | positioned horizontally, the axis of rotation of the drive pulley 35 extends vertically.

The drive rope 35 is wound with an elevator rope 36 having any of the configurations of the first to seventh embodiments. One end 36a and the other end 36b of the elevator rope 36 are connected to the support base 32 via a rope stop (not shown).

A car 37 is suspended between the one end 36a of the elevator rope 36 and the drive pulley 35. In the lower part of the car 37, a pair of wheels 38 on which the elevator rope 36 is wound is provided.

A counterweight 39 is suspended between the other end 36b of the elevator rope 36 and the drive pulley 35. At the upper portion of the counterweight 39, a pair of counterweights hanging wheels 40 on which the elevator rope 36 is wound are provided. The car 37 and the counterweight 39 move up and down the hoistway 31 by the drive device 33 via the elevator rope 36.

In the upper part of the hoistway 31, the car side guide car 41 which guides the elevator rope 36 extended from the drive pulley 35 to the car 37 is arrange | positioned. Moreover, the balance estimation guide vehicle 42 which guides the elevator rope 36 extended from the drive pulley 35 to the balance weight 39 is arrange | positioned at the upper part inside the hoistway 31. As shown in FIG.

The drive device 33, the car side guide car 41, and the balance estimation guide car 42 are arranged to overlap the car 37 in the vertical projection surface.

Moreover, the diameter of the guide wheel 42 for the car side guide car 41 and the balance weight is 15 times or more and 20 times or less of the diameter of the elevator rope 36.

In such an elevator apparatus, by using the high strength, long life, high friction elevator rope 36, the diameter of the car-side guide car 41 and the counterweight guide car 42 is 15 times or more of the diameter of the elevator rope 36, Sufficient rope life can be maintained even if it is 20 times or less.

Therefore, the car side guide car 41 and the balance estimation guide car 42 can be arranged in the space above the car 37 without increasing the height dimension of the hoistway 31, and the cross-sectional area of the hoistway 31 is obtained. There is no need to widen it.

In addition, the car side guide car 41 and the balance estimating guide car 42 are suitable to be at least 15 times as large as the rope diameter at an elevator device that is not frequently operated in practical use, and to be at least 20 times more suitable for an elevator device. can do. In addition, in order to suppress the height dimension of the hoistway 31, it is suitable that the diameter of the guide cars 41 and 42 shall be 30 times or less of the rope diameter. In particular, if the diameters of the guide cars 41 and 42 are in the range of 15 to 20 times the rope diameter, the height dimension of the hoistway 31 can be effectively reduced. In addition, if the diameters of the guide cars 41 and 42 are in the installation height range of the drive device 33, the height dimension of the hoistway 31 can be reduced more effectively.

According to the present invention, it is possible to increase the lifespan of the elevator rope, and to secure stability even when a part of the rope is worn out and broken, and to achieve miniaturization and cost reduction.

1 is a cross-sectional view of an elevator rope according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing the elevator rope of FIG. 1 broken by floor; FIG.

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

4 is a cross-sectional view of an elevator rope according to Embodiment 3 of the present invention.

5 is a cross-sectional view of an elevator rope according to Embodiment 4 of the present invention.

6 is a sectional view of an elevator rope according to Embodiment 5 of the present invention.

Fig. 7 is a sectional view showing the main parts of an elevator rope according to Embodiment 6 of the present invention.

8 is a sectional view showing the main parts of an elevator rope according to Embodiment 7 of the present invention.

FIG. 9 is a side view of the elevator rope of FIG. 8 broken and displayed per floor; FIG.

10 is a front view of an outline showing an elevator apparatus according to Embodiment 8 of the present invention.

FIG. 11 is a front view showing the elevator apparatus of FIG. 10.

Claims (3)

An inner layer rope having a plurality of inner layer strands in which a plurality of steel wires are twisted, An inner layer covering made of resin covering the outer circumference of the inner layer rope, An outer layer which is provided on the outer circumference of the inner layer covering body and is composed of at least 12 outer layer strands twisted with a plurality of steel wires having a diameter of 1/400 or less of the diameter of the drive pulley applied; Outer layer covering made of high friction resin material and covering the outer circumference of the outer layer Elevator rope comprising a. The method of claim 1, The high friction resin material is an elevator rope is a polyurethane resin. Lift, A drive device having a motor and a drive pulley rotated by the motor, the drive device being disposed above the hoistway so that the rotation axis of the drive pulley extends vertically; The inner layer rope having a plurality of inner layer strands in which a plurality of steel wires are twisted, an inner layer cover made of resin covering the outer circumference of the inner layer rope, and the drive applied to the outer circumference of the inner layer cover An outer layer covering composed of a high friction resin material and an outer layer composed of at least 12 outer layer strands twisted with a plurality of steel wires having a diameter of 1/400 or less of the pulley diameter, and covering the outer circumference of the outer layer. Having an elevator rope wound around the drive pulley, Cars and counterweights suspended in the hoistway by the elevator ropes, and hoisted by the drive device, A car side guide wheel disposed at an upper portion of the hoistway and leading the elevator rope extending from the drive pulley to the car; and A balance estimation guide wheel which is disposed above the hoistway and guides the elevator rope extending from the drive pulley to the balance estimation side. Including, The driving device, the car-side guide wheel and the counterweight guessing guide wheel are arranged to overlap the car in a vertical projection surface, the diameter of the car side guide wheel and the counterweight guessing guide wheel is at least 15 times the diameter of the elevator rope, The elevator apparatus characterized by being 30 times or less.