JP2022062853A - Sheave for elevator and elevator - Google Patents

Abstract

To provide a sheave for an elevator capable of lightening the weight of the sheave and suppressing the abrasion of an outer peripheral part of the sheave due to contact with a rope.SOLUTION: A sheave for an elevator includes an outer ring part in which a rope is wound around its outer peripheral part and an inner ring part whose outer peripheral part is covered with the outer ring part. The density of the inner ring part is smaller than the density of the outer ring part. The hardness of the outer ring part is larger than the hardness of the inner ring part.SELECTED DRAWING: Figure 2

Description

This application relates to elevator sheaves and elevators.

Conventionally, for example, an elevator sheave includes an outer ring portion on which a rope is hung on an outer peripheral portion and an inner ring portion whose outer peripheral portion is covered with an outer ring portion (for example, Patent Document 1). The outer ring portion is made of resin, and the inner ring portion is made of metal.

As a result, since a part of the sheave is made of resin, the weight of the entire sheave can be reduced. However, since the outer peripheral portion of the sheave is made of resin, the outer peripheral portion comes into contact with the rope, and the outer peripheral portion is severely worn. As a result, for example, the life of the sheave was short.

Japanese Unexamined Patent Publication No. 2017-197361

Therefore, an object of the present invention is to provide an elevator sheave and an elevator capable of reducing the weight of the sheave and suppressing the outer peripheral portion of the sheave from coming into contact with the rope and being worn.

The elevator sheave includes an outer ring portion on which the rope is hung on the outer peripheral portion and an inner ring portion whose outer peripheral portion is covered with the outer ring portion, and the density of the inner ring portion is higher than the density of the outer ring portion. Also small, the hardness of the outer ring portion is larger than the hardness of the inner ring portion.

Further, in the elevator sheave, the outer peripheral portion of the outer ring portion may be formed of one member.

Further, in the elevator sheave, the outer ring portion may be provided with a groove in contact with the rope on the outer peripheral portion, and the groove may be formed so that the bottom surface of the groove is separated from the rope.

Further, in the elevator sheave, the inner peripheral portion of the outer ring portion may be provided with a hooking portion for hooking the outer peripheral portion of the inner ring portion in the circumferential direction.

Further, in the elevator sheave, the inner ring portion constitutes an inner peripheral member constituting the inner peripheral portion of the inner ring portion and a plurality of outer peripheral portions divided in the circumferential direction by forming an outer peripheral portion of the inner ring portion. The inner peripheral member and the plurality of outer peripheral members are fixed to the outer ring portion by contacting the outer peripheral surface of the inner peripheral member and the inner peripheral surface of the plurality of outer peripheral members. The outer peripheral surface of the inner peripheral member and the inner peripheral surface of the plurality of outer peripheral members may be formed in a tapered shape.

Further, the elevator includes a basket, a balance weight, a rope connected to the cage and the balance weight, and the elevator sheave.

FIG. 1 is a schematic diagram of an elevator according to an embodiment. FIG. 2 is a perspective view of the sheave according to the embodiment. FIG. 3 is a front view of the sheave according to the embodiment. FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. FIG. 5 is an enlarged sectional view taken along line VV of FIG. FIG. 6 is an exploded perspective view of the sheave according to the embodiment. FIG. 7 is an enlarged view of the VII region of FIG. FIG. 8 is an enlarged cross-sectional view of another sheave. FIG. 9 is an exploded perspective view of the sheave according to another embodiment. FIG. 10 is a front view of the sheave according to still another embodiment. FIG. 11 is a front view of the sheave according to still another embodiment.

Hereinafter, one embodiment in the elevator and the sheave will be described with reference to FIGS. 1 to 7. In each drawing (the same applies to FIGS. 8 to 11), the dimensional ratio of the drawings does not always match the actual dimensional ratio, and the dimensional ratios between the drawings do not necessarily match. not.

As shown in FIG. 1, the elevator 10 includes a car 11 for a user to ride, a plurality of car ropes 12 connected to the car 11 (only one is shown in FIG. 1), and a plurality of cars. It is provided with a counterweight 13 connected to the rope 12. Further, the elevator 10 includes a hoisting machine 14 having a plurality of sheaves 1, 14a around which a plurality of car ropes 12 are wound.

The elevator 10 according to the present embodiment has a configuration in which the hoisting machine 14 is arranged inside a machine room provided in the upper part of the hoistway X1, but is not limited to such a configuration. For example, the elevator 10 may be configured such that the hoisting machine 14 is arranged inside the hoistway X1.

In the present embodiment, one end of the car rope 12 is fixed to the car 11, and the other end of the car rope 12 is fixed to the balance weight 13, but the configuration is not limited to this. .. For example, both ends of the car rope 12 are fixed to the upper part or the lower part of the hoistway X1, respectively, and the car rope 12 is wound around the sheave of the car 11 and the sheave of the counterweight 13, so that the car rope 12 is wound into the car 11. And, it may be configured that it is connected to the balance weight 13 respectively.

The elevator 10 includes a car rail 15 for guiding the car 11, a weight rail 16 for guiding the balance weight 13, and a control unit 17 for controlling each part of the elevator 10. Further, the elevator 10 includes a speed governor 18 for detecting the traveling speed of the car 11, and the car 11 has a stop device 11a for stopping the car 11 by sandwiching the car rail 15, and an operation of the speed governor 18. Is provided with a transmission unit 11b that transmits the above to the stop device 11a.

The speed governor 18 includes an endless annular governor rope 18a connected to the car 11 and governor sheaves 18b and 18b hung on the governor rope 18a. Then, when the speed of the car 11 exceeds the set speed, the running of the governor rope 18a is stopped, so that the stop device 11a is activated.

The hoist 14 includes a drive source (not shown and numbered) for rotating the sheave 1. The sheave 1 that transmits the force to the rope 12 among the plurality of sheaves 1, 14a and 18b is called the drive sheave 1, and the force is transmitted from the ropes 12 and 18a among the plurality of sheaves 1, 14a and 18b. The sheaves 14a and 18b are referred to as driven sheaves 14a and 18b.

For example, the drive sheave 1 may be larger than the driven sheaves 14a and 18b as in the present embodiment. Specifically, as in the present embodiment, the elevator 10 includes one drive sheave 1, for example, the drive sheave 1 is a sheave having the largest volume among a plurality of sheaves 1, 14a, 18b. Also, for example, the drive sheave 1 may be configured to be the sheave having the largest mass (weight) among the plurality of sheaves 1, 14a, 18b.

Here, the configuration of the drive sheave (hereinafter, also simply referred to as “sheave”) 1 will be described with reference to FIGS. 2 to 7.

In FIGS. 2 to 7 (the same applies to FIGS. 8 and later), the first direction D1 is the axial direction D1 parallel to the rotation axis of the sheave 1, and the second direction D2 is the diameter direction of the sheave 1. It is the radial direction D2, and the third direction D3 is the circumferential direction D3 which is the direction around the rotation axis of the sheave 1.

In the axial direction D1, the inside is the side close to the center of the sheave 1 in the axial direction D1, and the outside is the side far from the center of the sheave 1 in the axial direction D1. Further, in the radial direction D2, the inner side is the side close to the rotation axis of the sheave 1, and the outer side is the side far from the rotation axis of the sheave 1.

First, when the mass (weight) of the sheave 1 is large, for example, when the sheave 1 is replaced, it is necessary to carry the sheave 1, so that the work of replacing the sheave 1 is difficult. Further, when the mass (weight) of the sheave 1 is large, for example, in order to rotate the sheave 1, the power consumption of the electric motor as the drive source increases.

Therefore, as shown in FIGS. 2 and 3, the sheave 1 includes an outer ring portion 2 on which the cage rope 12 is hung on the outer ring portion 2a, and an inner ring portion 3 on which the outer peripheral portion 3a is covered with the outer ring portion 2. ing. The density of the inner ring portion 3 (mass per unit volume) is smaller than the density of the outer ring portion 2.

As a result, the weight of the sheave 1 can be reduced. Therefore, for example, the work of replacing the sheave 1 can be facilitated, and for example, the power consumption of the electric motor as a drive source can be reduced.

Further, since the car rope 12 is hung on the outer peripheral portion 2a of the outer ring portion 2, the outer peripheral portion 2a of the outer ring portion 2 is worn by the friction generated between the outer ring portion 2 and the car rope 12. Therefore, the hardness of the outer ring portion 2 is larger than the hardness of the inner ring portion 3. As a result, it is possible to prevent the outer peripheral portion 2a of the outer ring portion 2 from coming into contact with the car rope 12 and being worn, so that, for example, the life of the sheave 1 (the period during which the performance can be maintained) can be extended.

The hardness may be, for example, Vickers hardness, and may be a value measured in accordance with JIS Z2244. Although not particularly limited, for example, the outer ring portion 2 is formed of a metal (for example, steel, stainless steel, cast iron), and the inner ring portion 3 is formed of a resin (for example, polyamide, polyacetal, polyetheretherketone, etc.). It may have been done. Further, although not particularly limited, for example, the outer ring portion 2 is formed of a metal (for example, steel, stainless steel, cast iron), and the inner ring portion 3 is formed of a metal (for example, aluminum, aluminum alloy). May be good.

The inner ring portion 3 includes a hole portion 3b at the center of the radial direction D2. For example, the drive shaft of the drive source of the hoisting machine 14 is fitted into the hole portion 3b, so that the inner ring portion 3 transmits the drive from the drive source. Then, the drive of the drive source is transmitted to the car rope 12 via the inner ring portion 3 and the outer ring portion 2.

By the way, the outer ring portion 2 and the inner ring portion 3 are separate members. Therefore, the inner peripheral portion 2b of the outer ring portion 2 includes a first hooking portion 2c for hooking the outer peripheral portion 3a of the inner ring portion 3 in the circumferential direction D3. The outer peripheral portion 3a of the inner ring portion 3 includes a first hooked portion 3c that is hooked on the first hook portion 2c of the outer ring portion 2.

For example, as in the present embodiment, the first hooking portion 2c of the outer ring portion 2 is formed in a convex shape inward in the radial direction D2, and the first hooked portion 3c of the inner ring portion 3 is the first hooking portion. It may be configured to be concavely formed inward in the radial direction D2 so as to fit into 2c. Further, for example, the first hooking portion 2c of the outer ring portion 2 is formed in a concave shape outward in the radial direction D2, and the first hooked portion 3c of the inner ring portion 3 is fitted into the first hooking portion 2c. In addition, it may be configured to be convexly formed outward in the radial direction D2.

As a result, the first hooking portion 2c of the outer ring portion 2 hooks the first hooked portion 3c of the inner ring portion 3 in the circumferential direction D3, so that the outer ring portion 2 and the inner ring portion 3 rotate integrally. Can be made to. Therefore, since the force in the circumferential direction D3 can be transmitted between the outer ring portion 2 and the inner ring portion 3, for example, the drive of the drive source is driven via the inner ring portion 3 and the outer ring portion 2. , Is reliably transmitted to the car rope 12.

Further, as shown in FIGS. 2 to 4, the inner peripheral portion 2b of the outer ring portion 2 includes a second hooking portion 2d for hooking the outer peripheral portion 3a of the inner ring portion 3 in the axial direction D1. The outer peripheral portion 3a of the inner ring portion 3 includes a second hooked portion 3d that is hooked on the second hook portion 2d of the outer ring portion 2.

For example, as in the present embodiment, the second hooking portions 2d of the outer ring portion 2 are formed in a pair in a convex shape inward in the radial direction D2, and the pair of second hooking portions 2d and 2d are formed of the inner ring portion 3. The second hooked portion 3d may be sandwiched in the axial direction D1. Further, for example, the second hooking portion 2d of the outer ring portion 2 is formed in an inwardly convex shape (or outwardly concave shape) in the radial direction D2, and the second hooked portion 3d of the inner ring portion 3 is a second hooking portion. It may be configured to be concave (or convex outward) inward in the radial direction D2 so as to fit into the portion 2d.

As a result, the second hooking portion 2d of the outer ring portion 2 hooks the second hooked portion 3d of the inner ring portion 3 in the axial direction D1, so that the inner ring portion 3 is axially D1 with respect to the outer ring portion 2. It is possible to suppress the misalignment. Therefore, for example, the force can be reliably transmitted between the outer ring portion 2 and the inner ring portion 3.

Further, the inner ring portion 3 constitutes an inner peripheral member 4 constituting the inner peripheral portion 3e of the inner ring portion 3 and a plurality of outer peripheral members 5 formed by the outer peripheral portion 3a of the inner ring portion 3 and divided in the circumferential direction D3. And have. The number of the inner peripheral member 4 and the outer peripheral member 5 is not particularly limited, but as in the present embodiment, one inner peripheral member 4 is provided and two outer peripheral members 5 are provided. , May be the configuration.

As shown in FIGS. 4 to 6, the outer peripheral surface 4a of the inner peripheral member 4 and the inner peripheral surface 5a of the plurality of outer peripheral members 5 are in contact with each other, so that the inner peripheral member 4 and the plurality of outer peripheral members 5 are separated from each other. It is fixed to the ring portion 2. The outer peripheral surface 4a of the inner peripheral member 4 is formed in a tapered shape, and the inner peripheral surface 5a of the plurality of outer peripheral members 5 is formed in a tapered shape. That is, the outer peripheral surface 4a of the inner peripheral member 4 is a tapered surface, and the inner peripheral surface 5a of each outer peripheral member 5 is a part of the tapered surface divided in the circumferential direction D3.

For example, as in the present embodiment, the outer peripheral surface 4a of the inner peripheral member 4 is formed so as to reduce the diameter toward one side (lower side in FIGS. 4 to 6) of the axial direction D1. The inner peripheral surface 5a of the outer peripheral member 5 may be formed so as to reduce its diameter toward one side (lower side in FIGS. 4 to 6) of the axial direction D1.

As a result, after the plurality of outer peripheral members 5, 5 are arranged inside the outer ring portion 2, the inner peripheral member 4 is moved in the axial direction D1, so that the inner peripheral member 4 is the outer peripheral member 5, 5. It can be fitted in between. At this time, the outer peripheral surface 4a of the inner peripheral member 4 is in contact with the inner peripheral surfaces 5a, 5a of the plurality of outer peripheral members 5, 5.

Since the outer peripheral surface 4a of the inner peripheral member 4 and the inner peripheral surfaces 5a and 5a of the plurality of outer peripheral members 5 and 5 are formed in a tapered shape, the inner peripheral member 4 is formed on the plurality of outer peripheral members 5 and 5. The outer peripheral surfaces 5b, 5b of the plurality of outer peripheral members 5, 5 come into pressure contact with the inner peripheral portion 2b of the outer ring portion 2 as they are fitted in between. As a result, the inner peripheral member 4 and the plurality of outer peripheral members 5, 5 can be fixed to the outer ring portion 2, so that, for example, the work of fixing the inner ring portion 3 to the outer ring portion 2 can be facilitated. can.

In order to prevent the outer peripheral member 5 from being displaced in the circumferential direction D3 with respect to the inner peripheral member 4, for example, the outer peripheral member 5 has the outer peripheral portion of the inner peripheral member 4 in the circumferential direction D3. It may be provided with a hooking portion for hooking with. Further, the inner peripheral member 4 and the outer peripheral member 5 may be formed of, for example, the same material, or may be formed of, for example, different materials.

By the way, the outer ring portion 2 is provided with a plurality of grooves 2e in contact with the car rope 12 on the outer peripheral portion 2a. The number of grooves 2e is not particularly limited, but in the present embodiment, five grooves 2e are provided. The outer ring portion 2 is made of one member. As a result, the outer peripheral portion 2a of the outer ring portion 2, that is, the groove 2e of the outer ring portion 2 is formed of one member over the entire length of the circumferential direction D3.

As a result, the outer peripheral portion 2a of the outer ring portion 2, that is, the groove 2e of the outer ring portion 2 is smoothly formed over the entire length of the circumferential direction D3 without any step or unevenness between the members. Therefore, when the car rope 12 comes into contact with the outer peripheral portion 2a of the outer ring portion 2, that is, the groove 2e of the outer ring portion 2, it is possible to prevent the car rope 12 from being worn or damaged.

Further, as shown in FIG. 7, the groove 2e includes a groove side surface 2f in contact with the car rope 12 and a groove bottom surface 2g arranged on the innermost side in the radial direction D2 and away from the car rope 12. For example, the groove side surface 2f may be formed in a curved surface as shown in FIG. 7 (a), and for example, the groove side surface 2f may be formed in a planar shape as shown in FIG. 7 (b). It may have been done.

As a result, since the groove bottom surface 2g of the groove 2e is separated from the car rope 12, the contact area between the groove 2e and the car rope 12 becomes small. Therefore, since the pressure (force per unit area) generated between the groove 2e and the cage rope 12 becomes large, the traction (catch force) between the groove 2e and the cage rope 12 becomes large. As a result, for example, the drive of the sheave 1 can be reliably transmitted to the car rope 12.

On the other hand, since the pressure generated between the groove 2e and the cage rope 12 becomes large, the groove 2e is likely to be worn. On the other hand, since the hardness of the outer ring portion 2 is increased, it is possible to prevent the groove 2e from coming into contact with the car rope 12 and being worn. Thereby, for example, the life of the sheave 1 (the period during which the performance can be maintained) can be extended.

The groove bottom surface 2g may be formed in a planar shape between the groove side surfaces 2f and 2f as in the present embodiment, or may be formed in a curved surface shape between the groove side surfaces 2f and 2f, for example. You may. Further, the groove bottom surface 2g may be formed in a linear shape by connecting the planar groove side surfaces 2f and 2f to each other, for example.

From the above, the elevator 10 according to the present embodiment includes a car 11, a balance weight 13, a rope 12 connected to the car 11 and the balance weight 13, and the elevator sheave 1. ..

Further, as in the present embodiment, the elevator sheave 1 includes an outer ring portion 2 on which the rope 12 is hung on the outer peripheral portion 2a, and an inner ring portion 3 in which the outer peripheral portion 3a is covered with the outer ring portion 2. It is preferable that the density of the inner ring portion 3 is smaller than the density of the outer ring portion 2, and the hardness of the outer ring portion 2 is larger than the hardness of the inner ring portion 3.

According to such a configuration, since the density of the inner ring portion 3 is smaller than the density of the outer ring portion 2, the weight of the sheave 1 can be reduced. Moreover, since the hardness of the outer ring portion 2 is higher than the hardness of the inner ring portion 3, it is possible to prevent the outer peripheral portion 2a of the outer ring portion 2 from coming into contact with the rope 12 and being worn.

Further, as in the present embodiment, in the elevator sheave 1, it is preferable that the outer peripheral portion 2a of the outer ring portion 2 is formed of one member.

According to such a configuration, since the outer peripheral portion 2a of the outer ring portion 2 is formed of one member, the outer peripheral portion 2a of the outer ring portion 2 is smoothly formed. As a result, it is possible to prevent the rope 12 from being worn or damaged due to contact with the outer peripheral portion 2a of the outer ring portion 2.

Further, as in the present embodiment, in the elevator sheave 1, the outer ring portion 2 has a groove 2e in contact with the rope 12 on the outer peripheral portion 2a, and the groove 2e has a groove bottom surface 2g of the rope 12. It is preferable that the rope is formed so as to be away from the rope.

According to such a configuration, since the groove bottom surface 2g of the groove 2e is separated from the rope 12, the contact area between the groove 2e and the rope 12 becomes small, and the pressure generated between the groove 2e and the rope 12 becomes large. .. Further, since the hardness of the outer ring portion 2 is increased with respect to the increase in the pressure, it is possible to prevent the groove 2e from being worn due to contact with the rope 12.

Further, as in the present embodiment, in the elevator sheave 1, the inner peripheral portion 2b of the outer ring portion 2 includes a hooking portion 2c for hooking the outer peripheral portion 3a of the inner ring portion 3 in the circumferential direction D3. The configuration is preferred.

According to such a configuration, the hooking portion 2c of the inner peripheral portion 2b of the outer ring portion 2 hooks the outer peripheral portion 3a of the inner ring portion 3 in the circumferential direction D3, so that the outer ring portion 2 and the inner ring portion 3 are integrated. Can be rotated. As a result, the force in the circumferential direction D3 can be transmitted between the outer ring portion 2 and the inner ring portion 3.

Further, as in the present embodiment, in the elevator sheave 1, the inner ring portion 3 includes an inner peripheral member 4 constituting the inner peripheral portion 3e of the inner ring portion 3 and an outer peripheral portion of the inner ring portion 3. A plurality of outer peripheral members 5 constituting 3a and being divided in the circumferential direction D3 are provided, and the inner peripheral member 4 and the plurality of outer peripheral members 5 are an outer peripheral surface 4a of the inner peripheral member 4 and the plurality of outer peripheral members 5. By being in contact with the inner peripheral surface 5a of the outer peripheral member 5, it is fixed to the outer ring portion 2, and the outer peripheral surface 4a of the inner peripheral member 4 and the inner peripheral surface 5a of the plurality of outer peripheral members 5 are tapered. It is preferable that the structure is formed in.

According to such a configuration, since the outer peripheral surface 4a of the inner peripheral member 4 and the inner peripheral surface 5a of the plurality of outer peripheral members 5 are formed in a tapered shape, the outer peripheral surface 4a of the inner peripheral member 4 and the plurality of outer peripheral surfaces 4a are formed in a tapered shape. By contacting the inner peripheral surface 5a of the member 5, the outer peripheral surfaces 5b of the plurality of outer peripheral members 5 come into pressure contact with the inner peripheral surface 2b of the outer ring portion 2. As a result, the inner peripheral member 4 and the plurality of outer peripheral members 5 can be fixed to the outer ring portion 2.

The elevator 10 and the elevator sheave 1 are not limited to the configuration of the above-described embodiment, and are not limited to the above-mentioned action and effect. Of course, the elevator 10 and the elevator sheave 1 can be modified in various ways without departing from the gist of the present invention. For example, it is of course possible to arbitrarily select one or a plurality of configurations and methods according to the following various modified examples and adopt them in the configurations and methods according to the above-described embodiment.

(1) In the elevator sheave 1 according to the above embodiment, the outer peripheral portion 2a of the outer ring portion 2 is formed of one member. However, the elevator sheave 1 is not limited to such a configuration. For example, the outer ring portion 2 may be composed of a plurality of members divided in the circumferential direction D3, and the outer peripheral portion 2a of the outer ring portion 2 may be formed of the plurality of members.

(2) Further, in the elevator sheave 1 according to the above embodiment, the drive is such that the density of the inner ring portion 3 is smaller than the density of the outer ring portion 2 and the hardness of the outer ring portion 2 is larger than the hardness of the inner ring portion 3. The structure is that it is a sheave 1. However, the elevator sheave 1 is not limited to such a configuration. For example, the elevator sheaves 14a and 18b are driven sheaves 14a and 18b in which the density of the inner ring portion 3 is smaller than the density of the outer ring portion 2 and the hardness of the outer ring portion 2 is larger than the hardness of the inner ring portion 3. , May be the configuration.

(3) Further, in the elevator sheave 1 according to the above embodiment, the groove 2e is formed so that the groove bottom surface 2g is separated from the rope 12. However, the elevator sheave 1 is not limited to such a configuration.

For example, as shown in FIG. 8, the groove 2e may be formed so that the groove bottom surface 2g is in contact with the rope 12. According to such a configuration, the contact area between the rope 12 and the groove 2e becomes large, so that the pressure generated between the groove 2e and the rope 12 becomes small. As a result, wear of the groove 2e and the rope 12 can be suppressed.

For example, in a drive sheave, the traction between the groove 2e and the rope is often particularly important, while in a driven sheave, the life of the sheave 1 is often particularly important. Therefore, for example, when the sheave 1 is a drive sheave, the groove bottom surface 2g of the groove 2e is preferably configured to be separated from the rope, while, for example, when the sheave 1 is a driven sheave, the groove 2e The bottom surface 2g of the groove is preferably configured to be in contact with the rope.

(4) Further, in the elevator sheave 1 according to the above embodiment, the inner ring portion 3 includes one inner peripheral member 4 and a plurality of outer peripheral members 5. However, the elevator sheave 1 is not limited to such a configuration. For example, as shown in FIGS. 9 to 11, the inner ring portion 3 may be configured by one member.

For example, as shown in FIG. 9, the outer peripheral portion 3a of the inner ring portion 3 is formed to be slightly larger than the inner peripheral portion 2b of the outer ring portion 2, and the inner ring portion 3 is inside the outer ring portion 2. It may be configured so that it can be fitted while being pressurized. According to such a configuration, the outer peripheral portion 3a of the inner ring portion 3 can be brought into pressure contact with the inner peripheral portion 2b of the outer ring portion 2.

(5) Further, in the elevator sheave 1 according to the above embodiment, the inner peripheral portion 2b of the outer ring portion 2 includes a hooking portion 2c for hooking the outer peripheral portion 3a of the inner ring portion 3 in the circumferential direction D3. It is a composition. However, the elevator sheave 1 is not limited to such a configuration.

For example, as shown in FIG. 10, the sheave 1 may be configured to include a connecting portion 6 for connecting the outer ring portion 2 and the inner ring portion 3. For example, as shown in FIG. 10, the connecting portion 6 is formed in a plate shape, the first end portion of the connecting portion 6 is fixed to the outer ring portion 2, and the second end portion of the connecting portion 6 is. It may be fixed to the inner ring portion 3. According to such a configuration, the force in the circumferential direction D3 can be transmitted between the outer ring portion 2 and the inner ring portion 3.

(6) Further, in the elevator sheave 1 according to the above embodiment, the inner peripheral surface of the outer ring portion 2 has a flat surface and a curved surface, and the hooking portion 2c is formed by the flat surface. It is a composition. However, the elevator sheave 1 is not limited to such a configuration.

For example, as shown in FIG. 11, the inner peripheral surface of the outer ring portion 2 may not have a flat surface but only a curved surface, and the hooking portion 2c may be formed by the curved surface. .. According to such a configuration, the inner peripheral surface of the outer ring portion 2 is formed into a smooth uneven surface without forming a corner (a portion where the plane and the plane are connected so as to be refracted). As a result, when the force in the circumferential direction D3 is transmitted between the outer ring portion 2 and the inner ring portion 3, a local force is applied to the inner peripheral surface of the outer ring portion 2 and the outer peripheral surface of the inner ring portion 3. It can suppress working.

1 ... Elevator sheave (drive sheave), 2 ... Outer ring portion, 2a ... Outer peripheral portion, 2b ... Inner peripheral portion, 2c ... First hooking portion, 2d ... Second hooking portion, 2e ... Groove, 2f ... Groove side surface, 2g ... Groove bottom surface, 3 ... Inner ring portion, 3a ... Outer peripheral portion, 3b ... Hole, 3c ... First hooked portion, 3d ... Second hooked portion, 3e ... Inner peripheral portion, 4 ... Inner peripheral member, 4a ... outer peripheral surface, 5 ... outer peripheral member, 5a ... inner peripheral surface, 5b ... outer peripheral surface, 6 ... connection part, 10 ... elevator, 11 ... car, 11a ... stop device, 11b ... transmission part, 12 ... car rope, 13 ... Balance weight, 14 ... hoist, 14a ... driven sheave, 15 ... basket rail, 16 ... weight rail, 17 ... control unit, 18 ... speed governor, 18a ... governor rope, 18b ... governor sheave, D1 ... axial direction, D2 ... radial direction, D3 ... circumferential direction, X1 ... hoistway

Claims (6)

The outer ring where the rope is hung on the outer circumference, and
An inner ring portion whose outer peripheral portion is covered with the outer ring portion is provided.
The density of the inner ring portion is smaller than the density of the outer ring portion.
An elevator sheave having a hardness of the outer ring portion larger than the hardness of the inner ring portion. The elevator sheave according to claim 1, wherein the outer peripheral portion of the outer ring portion is formed of one member. The outer ring portion is provided with a groove in contact with the rope on the outer peripheral portion.
The elevator sheave according to claim 1 or 2, wherein the groove is formed so that the bottom surface of the groove is separated from the rope. The elevator sheave according to any one of claims 1 to 3, wherein the inner peripheral portion of the outer ring portion includes a hooking portion for hooking the outer peripheral portion of the inner ring portion in the circumferential direction. The inner ring portion includes an inner peripheral member constituting the inner peripheral portion of the inner ring portion, and a plurality of outer peripheral members constituting the outer peripheral portion of the inner ring portion and divided in the circumferential direction.
The inner peripheral member and the plurality of outer peripheral members are fixed to the outer ring portion by contacting the outer peripheral surface of the inner peripheral member and the inner peripheral surface of the plurality of outer peripheral members.
The elevator sheave according to any one of claims 1 to 4, wherein the outer peripheral surface of the inner peripheral member and the inner peripheral surface of the plurality of outer peripheral members are formed in a tapered shape. Basket,
With the balance weight,
A rope connected to the basket and the balance weight,
An elevator comprising the elevator sheave according to any one of claims 1 to 5 hung on the rope.

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