Rotating body and elevator hoisting machine

Abstract

Provided is a rotating body, wherein an outer rotating member has an annular fitting portion, a disc-shaped second fastening portion, and a plurality of connecting portions. The plurality of connecting portions are provided between the fitting portion and the second fastening portion with space between the connecting portions in the circumferential direction of the fitting portion, and connect the fitting portion and the second fastening portion. Apart from the plurality of connecting portions, there are a plurality of voids provided between the fitting portion and the second fastening portion. The thickness dimension of each connecting portion is smaller than the width dimension of the fitting portion in the radial direction of the fitting portion. The connecting portions are elastically deformable in the radial direction of the fitting portion.

Description

Rotating bodies and elevator hoists

[0001] The present disclosure relates to a rotating body and an elevator hoist.

[0002] In a conventional elevator hoisting machine, the sheave is fixed to the rotating frame by shrink fitting (see, for example, Patent Document 1).

[0003] JP 2009-155070 A

[0004] In conventional elevator traction machines such as those described above, when shrink-fitting a sheave to a rotating frame, the entire sheave must be heated to expand the diameter of the sheave hole, necessitating a heating device large enough to accommodate the entire sheave. However, for example, in a large elevator traction machine, if a sheave needs to be replaced, it is difficult to transport and install a large heating device in the machine room where the elevator traction machine is installed. This can make it difficult to replace the sheave on-site.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a rotating body and an elevator hoist that allow the outer rotating member to be easily fitted into the fitted portion of the inner rotating member.

[0006] The rotating body and elevator hoist according to the present disclosure comprise a rotatable inner rotating member having a fitted portion and a flange-shaped first fastening portion protruding radially outward from the outer periphery of the fitted portion, and an outer rotating member fixed to the inner rotating member and rotating together with the inner rotating member, the outer rotating member having a circular fitting portion fitted to the fitted portion, a disk-shaped second fastening portion provided radially outward of the fitting portion, overlapping the first fastening portion in the axial direction of the fitting portion and fixed to the first fastening portion by a plurality of fasteners, and a plurality of connecting portions provided between the fitting portion and the second fastening portion at intervals circumferentially of the fitting portion and connecting the fitting portion and the second fastening portion, a plurality of gaps being provided between the fitting portion and the second fastening portion, excluding the plurality of connecting portions, a thickness dimension of each connecting portion being smaller than a width dimension of the fitting portion in the radial direction of the fitting portion, and each connecting portion being elastically deformable radially of the fitting portion.

[0007] According to the present disclosure, the outer rotating member can be easily fitted into the fitted portion of the inner rotating member.

[0008] 1. A front view of a rotating body according to embodiment 1. A cross-sectional view taken along line II-II in FIG. 1. A front view of a rotating body according to embodiment 2. A cross-sectional view taken along line IV-IV in FIG. 3. A front view of a rotating body according to embodiment 3. A cross-sectional view taken along line VI-VI in FIG. 5. A front view of a rotating body according to embodiment 4. A cross-sectional view taken along line VIII-VIII in FIG. 7. A front view of a rotating body according to embodiment 5. A cross-sectional view taken along line X-X in FIG. 9. A front view showing an enlarged main part of FIG. 9. A front view of a rotating body according to embodiment 6. A cross-sectional view taken along line XIII-XIII in FIG. 12. A front view showing an enlarged main part of FIG. 12. A front view of a rotating body according to embodiment 7. A cross-sectional view taken along line XVI-XVI in FIG. 15. A front view showing an enlarged main part of FIG. 15. A front view of a rotating body according to embodiment 8. A cross-sectional view taken along line XIX-XIX in FIG. 18. A front view showing an enlarged main part of FIG. 18. 1 is a configuration diagram showing an example of an elevator to which a rotating body according to the present disclosure is applied;

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1 Fig. 1 is a front view showing a rotating body according to embodiment 1. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.

[0010] In the drawing, a pair of bearings 12 are mounted on the outer periphery of a shaft member 11. The cross section of the shaft member 11 perpendicular to the axis C of the shaft member 11 has a circular shape.

[0011] A hub 13, which is a rotatable inner rotating member, is attached to the outer periphery of the pair of bearings 12. That is, the hub 13 is attached to the shaft member 11 via the pair of bearings 12. The hub 13 rotates relative to the shaft member 11 around the axis C.

[0012] The hub 13 has a cylindrical fitted portion 13a and a flange-shaped first fastening portion 13b. The fitted portion 13a is positioned coaxially with the shaft member 11. The pair of bearings 12 are interposed between the outer peripheral surface of the shaft member 11 and the inner peripheral surface of the fitted portion 13a.

[0013] The first fastening portion 13b protrudes from the outer periphery of the fitted portion 13a radially outward from the fitted portion 13a. The radial direction of the fitted portion 13a is perpendicular to the axis C. The hub 13 in the first embodiment is configured as a single component.

[0014] An outer rotating member 14 is fixed to the hub 13. The outer rotating member 14 rotates together with the hub 13 about an axis C. The rotating body in the first embodiment has the hub 13, the outer rotating member 14, and a plurality of fasteners 15.

[0015] The outer rotating member 14 has an annular fitting portion 14a, a disk-shaped second fastening portion 14b, a plurality of flat connecting portions 14c, and a cylindrical outer circumferential portion 14d. The fitting portion 14a is fitted and fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0016] The second fastening portion 14b is provided radially outward of the fitting portion 14a. The radial direction of the fitting portion 14a is perpendicular to the axis C. The second fastening portion 14b protrudes radially inward from the inner circumferential surface of the outer circumferential portion 14d of the fitting portion 14a.

[0017] The second fastening portion 14b is overlapped with the first fastening portion 13b in the axial direction of the fitting portion 14a, which is parallel to the axis C and corresponds to the left-right direction in FIG.

[0018] The second fastening portion 14b is fixed to the first fastening portion 13b by a plurality of fasteners 15. The plurality of fasteners 15 are arranged at equal intervals in the circumferential direction of the fitting portion 14a. The circumferential direction of the fitting portion 14a is a direction along the circumference of a circle centered on the axis C. The plurality of fasteners 15 are also arranged on the same circumference of a circle centered on the axis C.

[0019] For example, a bolt is used as each fastener 15. Each bolt passes through the second fastening portion 14b parallel to the axis C and is screwed into a threaded hole in the first fastening portion 13b.

[0020] The plurality of connecting portions 14c are provided between the fitting portion 14a and the second fastening portion 14b at equal intervals in the circumferential direction of the fitting portion 14a. The plurality of connecting portions 14c connect the fitting portion 14a and the second fastening portion 14b. The plurality of connecting portions 14c are also arranged symmetrically with respect to the axis C.

[0021] In this example, two connecting portions 14c are provided between the fitting portion 14a and the second fastening portion 14b. Also, in this example, four fasteners 15 are used. Two of the four fasteners 15 are arranged in the same position in the circumferential direction of the fitting portion 14a as the connection portion of the connecting portion 14c with the second fastening portion 14b.

[0022] One end of each connecting portion 14c is connected to the outer peripheral surface of the fitting portion 14a. The other end of each connecting portion 14c is connected to the inner peripheral surface of the second fastening portion 14b. Each connecting portion 14c protrudes from the outer peripheral surface of the fitting portion 14a in a tangential direction to the outer peripheral surface of the fitting portion 14a. That is, when viewed along the axial direction of the fitting portion 14a, the two connecting portions 14c are inclined in the same direction relative to the radial direction of the fitting portion 14a.

[0023] A plurality of gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, except for the plurality of connecting portions 14c. In this example, a pair of gaps 14e is provided between the fitting portion 14a and the second fastening portion 14b.

[0024] A connecting portion 14c is interposed between two circumferentially adjacent gaps 14e of the fitting portion 14a. The fasteners 15 are located radially outward of the connecting portions 14c and the gaps 14e of the fitting portion 14a.

[0025] The thickness of each connecting portion 14c is smaller than the width of the fitting portion 14a in the radial direction of the fitting portion 14a. The thickness of each connecting portion 14c is also smaller than the width of the second fastening portion 14b in the radial direction of the fitting portion 14a.

[0026] Each connecting portion 14c is elastically deformable in the radial direction of the fitting portion 14a. When the fitting portion 14a is heated and expands, each connecting portion 14c is pushed toward the second fastening portion 14b by the fitting portion 14a, and elastically deforms like a leaf spring. When the fitting portion 14a contracts, each connecting portion 14c returns to its original state.

[0027] In this rotating body, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded using a small amount of heat and a small heating device.

[0028] Therefore, according to the configuration of the first embodiment, the outer rotation member 14 can be easily fitted into the fitted portion 13a.

[0029] In addition, the outer rotating member 14 can be easily removed from the fitted portion 13a. Therefore, a new rotating body can be carried in disassembled into the hub 13 and the outer rotating member 14 to the installation site of the existing rotating body, and the existing rotating body can be easily replaced with the new rotating body.

[0030] Furthermore, when the fitting portion 14a is heated and expanded, the plurality of connecting portions 14c elastically deform, preventing the plurality of connecting portions 14c from interfering with the expansion of the hole of the fitting portion 14a. This makes it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0031] The hub 13 is attached to the shaft member 11 via the bearing 12. Therefore, in a rotating body that rotates relative to the shaft member 11, the outer rotating member 14 can be easily fitted into the fitted portion 13a.

[0032] In addition, each connecting portion 14c may be part of the member constituting the fitting portion 14a and the second fastening portion 14b, or may be constituted as a separate member from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0033] The number of connecting portions 14c may be three or more.

[0034] Embodiment 2 Next, Fig. 3 is a front view showing a rotating body according to embodiment 2. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3.

[0035] In the second embodiment, a plurality of connecting portions 14f are provided between the fitting portion 14a and the second fastening portion 14b, instead of the plurality of connecting portions 14c in the first embodiment. When viewed along the axis C, each connecting portion 14f has a V-shape.

[0036] Each connecting portion 14f has a flat first portion 14f-1 and a flat second portion 14f-2. The first portion 14f-1 and the second portion 14f-2 are connected to each other at the middle of the connecting portion 14f. The second portion 14f-2 forms an obtuse angle with the first portion 14f-2.

[0037] The middle portion of each connecting portion 14f is connected to the outer peripheral surface of the fitting portion 14a. Both ends of each connecting portion 14f are connected to the inner peripheral surface of the second fastening portion 14b. The first portion 14f-1 protrudes from the outer peripheral surface of the fitting portion 14a in a tangential direction to the outer peripheral surface of the fitting portion 14a. The second portion 14f-2 protrudes from the outer peripheral surface of the fitting portion 14a in a tangential direction to the outer peripheral surface of the fitting portion 14a, in the opposite direction from the first portion 14f-1.

[0038] The thickness of each connecting portion 14f, i.e., the thickness of each of the first portion 14f-1 and the second portion 14f-2, is smaller than the width of the fitting portion 14a in the radial direction of the fitting portion 14a. Also, the thickness of each connecting portion 14f is smaller than the width of the second fastening portion 14b in the radial direction of the fitting portion 14a.

[0039] Each connecting portion 14f is elastically deformable in the radial direction of the fitting portion 14a. When the fitting portion 14a is heated and expanded, each connecting portion 14f is pushed toward the second fastening portion 14b by the fitting portion 14a and elastically deforms radially outward of the fitting portion 14a. When the fitting portion 14a contracts, each connecting portion 14f returns to its original state.

[0040] Other configurations in the second embodiment are the same as those in the first embodiment.

[0041] With this configuration, the same effects as those of the first embodiment can be obtained.

[0042] Each connecting portion 14f is V-shaped. The middle portion of each connecting portion 14f is connected to the outer circumferential surface of the fitting portion 14a. Both ends of each connecting portion 14f are connected to the inner circumferential surface of the second fastening portion 14b. Therefore, when the fitting portion 14a expands due to heat, the first portion 14f-1 and the second portion 14f-2 suppress rotation of the fitting portion 14a.

[0043] This makes it possible to easily align the second fastening portion 14b with the first fastening portion 13b in the circumferential direction of the fitting portion 14a, and thus makes it possible to easily assemble the rotating body.

[0044] In addition, each connecting portion 14f may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0045] The number of connecting portions 14f may be three or more.

[0046] Embodiment 3 Next, Fig. 5 is a front view showing a rotating body according to embodiment 3. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 5.

[0047] In the third embodiment, instead of the multiple connecting portions 14c in the first embodiment, multiple connecting portions 14g are provided between the fitting portion 14a and the second fastening portion 14b. When viewed along the axis C, each connecting portion 14g has a triangular waveform, i.e., a shape formed by connecting multiple V-shapes in series. In this example, each connecting portion 14g has a W-shape.

[0048] One end of each connecting portion 14g is connected to the outer circumferential surface of the fitting portion 14a, and the other end of each connecting portion 14g is connected to the inner circumferential surface of the second fastening portion 14b.

[0049] The thickness of each connecting portion 14g is smaller than the width of the fitting portion 14a in the radial direction of the fitting portion 14a. The thickness of each connecting portion 14g is also smaller than the width of the second fastening portion 14b in the radial direction of the fitting portion 14a.

[0050] Each connecting portion 14g is elastically deformable in the radial direction of the fitting portion 14a. When the fitting portion 14a is heated and expanded, each connecting portion 14g is pushed toward the second fastening portion 14b by the fitting portion 14a and elastically deforms radially outward of the fitting portion 14a. When the fitting portion 14a contracts, each connecting portion 14g returns to its original state.

[0051] Other configurations in the third embodiment are the same as those in the first embodiment.

[0052] With this configuration, the same effects as those of the first embodiment can be obtained.

[0053] Furthermore, the shape of each connecting portion 14g is triangular. This allows each connecting portion 14g to easily deform elastically when the fitting portion 14a heats and expands, preventing the connecting portions 14g from interfering with the expansion of the hole in the fitting portion 14a. This makes it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0054] In addition, each connecting portion 14g may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0055] The number of connecting portions 14g may be three or more.

[0056] Embodiment 4 Next, Fig. 7 is a front view showing a rotating body according to embodiment 4. Fig. 8 is a cross-sectional view taken along line VIII-VIII in Fig. 7.

[0057] In the fourth embodiment, a plurality of connecting portions 14h are provided between the fitting portion 14a and the second fastening portion 14b, instead of the plurality of connecting portions 14c in the first embodiment. When viewed along the axis C, each connecting portion 14h has a V-shape.

[0058] One end of each connecting portion 14h is connected to the outer circumferential surface of the fitting portion 14a, and the other end of each connecting portion 14h is connected to the inner circumferential surface of the second fastening portion 14b.

[0059] The thickness of each connecting portion 14h is smaller than the width of the fitting portion 14a in the radial direction of the fitting portion 14a. The thickness of each connecting portion 14h is also smaller than the width of the second fastening portion 14b in the radial direction of the fitting portion 14a.

[0060] Each connecting portion 14h is elastically deformable in the radial direction of the fitting portion 14a. When the fitting portion 14a is heated and expanded, each connecting portion 14h is pushed toward the second fastening portion 14b by the fitting portion 14a, and elastically deforms radially outward of the fitting portion 14a. When the fitting portion 14a contracts, each connecting portion 14h returns to its original state.

[0061] Other configurations in the fourth embodiment are the same as those in the first embodiment.

[0062] With this configuration, the same effects as those of the first embodiment can be obtained.

[0063] Furthermore, each of the connecting portions 14h has a V-shape, which allows the connecting portions 14g to easily deform elastically when the fitting portion 14a expands due to heat, thereby preventing the connecting portions 14h from interfering with the expansion of the hole in the fitting portion 14a. This makes it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0064] Furthermore, since the shape of each of the connecting portions 14h is simple, it is possible to easily manufacture each of the connecting portions 14h.

[0065] In addition, each connecting portion 14h may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0066] The number of connecting portions 14h may be three or more.

[0067] In addition, in the first to fourth embodiments, the first fastening portion 13b may be configured as a separate member from the fitted portion 13a. In this case, the first fastening portion 13b may be fitted and fixed to the outer periphery of the fitted portion 13a by shrink fitting.

[0068] Embodiment 5 Next, Fig. 9 is a front view showing a rotating body according to embodiment 5. Fig. 10 is a cross-sectional view taken along line XX in Fig. 9. Fig. 11 is an enlarged front view showing a main part of Fig. 9.

[0069] The rotating body in the fifth embodiment has a rotating shaft body 21 as an inner rotating member, an outer rotating member 14 , and a plurality of fasteners 15 .

[0070] The rotating shaft body 21 has a shaft member 22 as a fitted portion and a flange member 23 as a first fastening portion. The flange member 23 is configured as a separate member from the shaft member 22. The flange member 23 is fixed to the outer periphery of the shaft member 22 by shrink fitting. This allows the flange member 23 to rotate together with the shaft member 22.

[0071] The fitting portion 14a is fitted and fixed to the outer periphery of the shaft member 22 by shrink fitting. The second fastening portion 14b is fixed to the flange member 23 by a plurality of fasteners 15. This allows the outer rotating member 14 to rotate together with the rotating shaft body 21 around the axis C of the rotating shaft body 21.

[0072] In the first to fourth embodiments, the outer rotating member 14 can function mainly as a driven wheel, but in the fifth embodiment, the outer rotating member 14 can function mainly as a driving wheel. Other configurations in the fifth embodiment are the same as those in the first embodiment.

[0073] In this rotating body, multiple gaps 14e are provided between the fitting portion 14a and the second fastening portion 14b, excluding the multiple connecting portions 14c. Therefore, even when only the fitting portion 14a is heated, heat conduction to the second fastening portion 14b is suppressed, and the fitting portion 14a can be heated efficiently. This allows the hole in the fitting portion 14a to be expanded using a small amount of heat and a small heating device.

[0074] Therefore, according to the configuration of the fifth embodiment, the outer rotating member 14 can be easily fitted onto the shaft member 22 .

[0075] Furthermore, the outer rotating member 14 can be easily removed from the rotating shaft 21. Therefore, a new rotating body disassembled into the rotating shaft 21 and the outer rotating member 14 can be carried to the installation site of an existing rotating body, and the existing rotating body can be easily replaced with the new rotating body.

[0076] Furthermore, when the fitting portion 14 a is heated and expanded, the plurality of connecting portions 14 c elastically deform, preventing the plurality of connecting portions 14 c from interfering with the expansion of the hole of the fitting portion 14 a. This makes it even easier to fit the outer rotating member 14 onto the shaft member 22.

[0077] Furthermore, the outer rotating member 14 is rotatable together with the rotating shaft body 21. Therefore, in a rotating body in which the rotating shaft body 21 rotates, the outer rotating member 14 can be easily fitted to the shaft member 22.

[0078] Furthermore, since the rotating shaft body 21 is divided into the shaft member 22 and the flange member 23, the rotating shaft body 21 can be easily transported.

[0079] In addition, each connecting portion 14c may be part of the member constituting the fitting portion 14a and the second fastening portion 14b, or may be constituted as a separate member from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0080] The number of connecting portions 14c may be three or more.

[0081] Embodiment 6 Next, Fig. 12 is a front view showing a rotating body according to embodiment 6. Fig. 13 is a cross-sectional view taken along line XIII-XIII in Fig. 12. Fig. 14 is an enlarged front view showing a main part of Fig. 12.

[0082] In the sixth embodiment, instead of the plurality of connecting portions 14c in the fifth embodiment, a plurality of connecting portions 14f similar to those in the second embodiment are provided between the fitting portion 14a and the second fastening portion 14b.

[0083] Other configurations in the sixth embodiment are the same as those in the fifth embodiment.

[0084] With this configuration, the same effects as those of the fifth embodiment can be obtained.

[0085] Furthermore, when the fitting portion 14a is heated and expanded, the first portion 14f-1 and the second portion 14f-2 suppress rotation of the fitting portion 14a, which makes it easy to align the second fastening portion 14b with the first fastening portion 13b in the circumferential direction of the fitting portion 14a, and thus makes it easy to assemble the rotating body.

[0086] In addition, each connecting portion 14f may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0087] The number of connecting portions 14f may be three or more.

[0088] Embodiment 7 Next, Fig. 15 is a front view showing a rotating body according to embodiment 7. Fig. 16 is a cross-sectional view taken along line XVI-XVI in Fig. 15. Fig. 17 is an enlarged front view showing a main part of Fig. 15.

[0089] In the seventh embodiment, instead of the plurality of connecting portions 14c in the fifth embodiment, a plurality of connecting portions 14g similar to those in the third embodiment are provided between the fitting portion 14a and the second fastening portion 14b.

[0090] Other configurations of the seventh embodiment are the same as those of the fifth embodiment.

[0091] With this configuration, the same effects as those of the fifth embodiment can be obtained.

[0092] Furthermore, the shape of each connecting portion 14g is triangular. This allows each connecting portion 14g to easily deform elastically when the fitting portion 14a heats and expands, preventing the connecting portions 14g from interfering with the expansion of the hole in the fitting portion 14a. This makes it even easier to fit the outer rotating member 14 onto the shaft member 22.

[0093] In addition, each connecting portion 14g may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0094] The number of connecting portions 14g may be three or more.

[0095] Embodiment 8 Next, Fig. 18 is a front view showing a rotating body according to embodiment 8. Fig. 19 is a cross-sectional view taken along line XIX-XIX in Fig. 18. Fig. 20 is an enlarged front view showing a main part of Fig. 18.

[0096] In the eighth embodiment, instead of the plurality of connecting portions 14c in the fifth embodiment, a plurality of connecting portions 14h similar to those in the fourth embodiment are provided between the fitting portion 14a and the second fastening portion 14b.

[0097] Other configurations in the eighth embodiment are the same as those in the fifth embodiment.

[0098] With this configuration, the same effects as those of the fifth embodiment can be obtained.

[0099] Furthermore, each of the connecting portions 14h has a V-shape, which allows the connecting portions 14g to easily deform elastically when the fitting portion 14a expands due to heat, thereby preventing the connecting portions 14h from interfering with the expansion of the hole in the fitting portion 14a. This makes it even easier to fit the outer rotating member 14 into the fitted portion 13a.

[0100] Furthermore, since the shape of each of the connecting portions 14h is simple, it is possible to easily manufacture each of the connecting portions 14h.

[0101] In addition, each connecting portion 14h may be part of the components that constitute the fitting portion 14a and the second fastening portion 14b, or may be constructed as a separate component from the fitting portion 14a and the second fastening portion 14b and fixed to the fitting portion 14a and the second fastening portion 14b.

[0102] The number of connecting portions 14h may be three or more.

[0103] In addition, in the fifth to eighth embodiments, the shaft member 22 and the flange member 23 may be configured as one member.

[0104] Also, in all the embodiments, the number of fasteners 15 may be two, three, five or more.

[0105] Here, FIG. 21 is a configuration diagram showing an example of an elevator to which the rotating body according to the present disclosure is applied.

[0106] A machine room 52 is provided above the hoistway 51. An elevator hoisting machine 53 and a deflector sheave 56 are installed in the machine room 52.

[0107] The elevator hoist 53 has a hoist motor 54, a hoist brake (not shown), and a drive sheave 55. The hoist motor 54 rotates the drive sheave 55. The hoist brake keeps the drive sheave 55 stationary. The hoist brake also brakes the rotation of the drive sheave 55.

[0108] A suspension body 57 is wound around the drive sheave 55 and the deflector pulley 56. A plurality of ropes or a plurality of belts is used as the suspension body 57. A cage 58 is connected to a first end of the suspension body 57. A counterweight 59 is connected to a second end of the suspension body 57.

[0109] The car 58 and the counterweight 59 are suspended within the hoistway 51 by a suspension 57. The car 58 and the counterweight 59 move up and down within the hoistway 51 by rotating the drive sheave 55.

[0110] A pair of car guide rails 60 and a pair of counterweight guide rails 61 are installed in the hoistway 51. In Fig. 21, only one car guide rail 60 and one counterweight guide rail 61 are shown.

[0111] A pair of car guide rails 60 guide the car 58 as it moves up and down. A pair of counterweight guide rails 61 guide the counterweight 59 as it moves up and down.

[0112] The car 58 has a car frame 62 and a car chamber 63. The suspension body 57 is connected to the car frame 62. The car chamber 63 is supported by the car frame 62.

[0113] The rotating body shown in any one of the first to eighth embodiments is used as the drive sheave 55. A suspension body 57 is wound around the outer peripheral surface of the outer peripheral portion 14d of the outer rotating member 14.

[0114] In such an elevator hoisting machine 53, it may become necessary to replace the drive sheave 55 or the pair of bearings 12 after long-term use. In this case, because the rotating body according to any one of the first to eighth embodiments is used as the drive sheave 55, the drive sheave 55 can be easily transported, and the drive sheave 55 or the pair of bearings 12 can be easily replaced.

[0115] The elevator type is not limited to the type shown in FIG. 21, but may be, for example, a 2:1 roping type.

[0116] The elevator may also be a machine room-less elevator, a double-deck elevator, a one-shaft multi-car elevator, etc. In a one-shaft multi-car elevator, an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

[0117] REFERENCE SIGNS LIST 11 Shaft member, 12 Bearing, 13 Hub (inner rotating member), 13a Fitted portion, 13b First fastening portion, 14 Outer rotating member, 14a Fitting portion, 14b Second fastening portion, 14c, 14f, 14g, 14h Connecting portion, 14e Gap, 15 Fastener, 21 Rotating shaft body (inner rotating member), 22 Shaft member (fitted portion), 23 Flange member (first fastening portion), 53 Elevator hoist, 54 Hoist motor, 55 Drive sheave.

Claims

1. A rotatable inner rotating member having a fitting portion and a flange-shaped first fastening portion that protrudes radially outward from the outer circumference of the fitting portion, and An outer rotating member fixed to the inner rotating member and rotating together with the inner rotating member. Equipped with, The outer rotating member is An annular fitting portion that is fitted into the fitting portion, A disc-shaped second fastening portion is provided on the radially outer side of the fitting portion, overlaps the first fastening portion with respect to the fitting portion in the axial direction, and is fixed to the first fastening portion by a plurality of fasteners, A plurality of connecting portions are provided between the fitting portion and the second fastening portion at intervals from each other in the circumferential direction of the fitting portion, and connect the fitting portion and the second fastening portion. It has, Between the fitting portion and the second fastening portion, there are multiple gaps, excluding the multiple connecting portions. The thickness dimension of each connecting portion is smaller than the width dimension of the fitting portion in the radial direction. Each of the aforementioned connecting portions is a rotating body that is elastically deformable in the radial direction of the fitting portion.

2. The rotating body according to claim 1, wherein the inner rotating member is mounted on the shaft member via a bearing and is a hub that rotates relative to the shaft member about the axis of the shaft member.

3. The aforementioned inner rotating member is a rotating shaft, The rotating body according to claim 1, wherein the outer rotating member is rotatable together with the rotating shaft body about the axis of the rotating shaft body.

4. The shape of each of the aforementioned connecting parts is V-shaped. Each of the aforementioned connecting portions is connected to the outer circumferential surface of the fitting portion. The rotating body according to any one of claims 1 to 3, wherein both ends of each connecting portion are connected to the inner circumferential surface of the second fastening portion.

5. The shape of each of the aforementioned connecting parts is a triangular waveform. Each of the aforementioned connecting parts has one end connected to the outer circumferential surface of the fitting part. The rotating body according to any one of claims 1 to 3, wherein the other end of each connecting portion is connected to the inner circumferential surface of the second fastening portion.

6. The shape of each of the aforementioned connecting parts is V-shaped. Each of the aforementioned connecting parts has one end connected to the outer circumferential surface of the fitting part. The rotating body according to any one of claims 1 to 3, wherein the other end of each connecting portion is connected to the inner circumferential surface of the second fastening portion.

7. Drive sheave, and Hoisting motor that rotates the drive sheave Equipped with, An elevator hoisting machine in which the rotating body described in claim 1 is used as the drive sheave.