Rotating bodies and elevators

Abstract

To provide a rotor capable of preventing leakage of a lubricant used for a bearing and an elevator to which the rotor is applied.SOLUTION: The rotor comprises: a main spindle which serves as a rotary shaft; a first structure rotatably supported on the main spindle via a bearing; and a second structure that is attached to the first structure via a liquid gasket and that seals a space provided with the bearing. The rotor further comprises a bolt hole provided from the second structure to the first structure side, a fixing bolt engaged with the bolt hole to fix the second structure to the first structure, and a ventilation hole provided in the first structure, communicated with the bolt hole, and communicated with a space different from the space provided with the bearing.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a rotating body and an elevator. [Background technology]

[0002] Conventionally, in order to seal oil such as a lubricant between two parts that are to be fitted together, a configuration has been proposed in which a seal structure made of a liquid gasket is applied to the mating surfaces of two parts. A liquid gasket is a material that is widely used to seal gases and liquids, and is a material that hardens as it dries over time from a liquid state. Patent Document 1 discloses that a liquid gasket before hardening is applied to one of two parts, the other part is bonded to the one part via the liquid gasket, and then the liquid gasket is hardened to fix the two parts in an oil-tight manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-144884 A Summary of the Invention [Problem to be solved by the invention]

[0004] In elevator hoists and rotating bodies such as pulleys, lubricants (grease) are used around the bearings, and a structure is required to prevent leakage of the lubricant. However, there is a risk that the liquid gasket will be damaged when sealing in the lubricant.

[0005] Therefore, an object of the present invention is to provide a rotating body capable of preventing leakage of a lubricant used in a bearing, and an elevator to which the rotating body is applied. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the object of the present invention, the rotating body of the present invention includes a main shaft that serves as a rotating shaft, a first structure that is rotatably supported on the main shaft via a bearing, and a second structure that is attached to the first structure via a liquid gasket and seals a space in which the bearing is provided. Also, the second structure includes a bolt hole provided from the second structure to the first structure side, a fixing bolt that screws into the bolt hole and fixes the second structure to the first structure, and a bolt that is provided in the first structure, communicates with the bolt hole and is a space different from the space in which the bearing is provided. A space with air flow and a vent hole communicating with the

[0007] The elevator of the present invention is equipped with the above-mentioned rotating body. Effect of the Invention

[0008] According to the present invention, damage to the liquid gasket in the rotating body during assembly can be prevented, and therefore leakage of lubricant from damaged portions of the liquid gasket can be prevented. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram showing an example of the configuration of an elevator according to a first embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a cross-sectional configuration diagram of a weight-side pulley according to the first embodiment of the present invention. [Diagram 3] FIG. 11 is a cross-sectional configuration diagram of a weight-side pulley according to a second embodiment of the present invention. [Figure 4] FIG. 11 is a cross-sectional configuration diagram of a weight-side pulley according to a third embodiment of the present invention. [Diagram 5] FIG. 5A is a configuration diagram of a weight side pulley according to a fourth embodiment of the present invention when viewed from the first fixed member side, and FIG. 5B is a configuration diagram of the weight side pulley according to the fourth embodiment of the present invention when viewed from the second fixed member side. [Figure 6] FIG. 11 is a cross-sectional configuration diagram of a weight-side pulley according to a fourth embodiment of the present invention. [Figure 7] FIG. 13 is a cross-sectional configuration diagram of a weight-side pulley according to a fifth embodiment of the present invention. [Figure 8] FIG. 13 is a cross-sectional configuration diagram of a weight-side pulley according to a sixth embodiment of the present invention. [Figure 9] FIG. 13 is a cross-sectional configuration diagram of a weight-side pulley according to a seventh embodiment of the present invention. [Figure 10] FIG. 13 is a cross-sectional configuration diagram of a weight-side pulley according to an eighth embodiment of the present invention. [Figure 11] FIG. 4 is a cross-sectional view of a weight-side pulley 300 according to a comparative example. [Figure 12] 12A and 12B are diagrams showing a state in which the weight-side pulley 300 according to the comparative example is assembled. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an example of an elevator and a rotating body according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following example. In each of the drawings described below, the same reference numerals are used to denote common members.

[0011] 1. First embodiment 1-1. Elevator configuration First, an elevator according to a first embodiment of the present invention (hereinafter, referred to as "this embodiment") will be described with reference to Fig. 1. Fig. 1 is a schematic configuration diagram showing an example of the configuration of an elevator 1 of this embodiment.

[0012] As shown in Fig. 1, this is a so-called machine room equipped elevator, which has a machine room above a hoistway formed in a building structure. The elevator 1 shown in Fig. 1 is a so-called 2:1 roping type elevator.

[0013] The elevator 1 has a car 2 that rises and falls in a hoistway 100, a main rope 3, a hoist 4, and a counterweight 5 suspended from the car 2 via the main rope 3. Hereinafter, the direction in which the car 2 and the counterweight 5 rise and fall is referred to as the up and down direction.

[0014] The car 2 carries people and luggage. A car side pulley 2a is provided at the top of the car 2 in the vertical direction. A main rope 3 is wound around the car side pulley 2a. A weight side pulley 10 is provided on the counterweight 5. The main rope 3 is wound around the weight side pulley 10. The detailed configuration of the weight side pulley 10 will be described later.

[0015] The hoisting machine 4 is installed on a machine beam 110 installed in a machine room of the elevator shaft 100. The hoisting machine 4 also has a sheave 4a around which the main rope 3 is wound. The hoisting machine 4 raises and lowers the car 2 and the counterweight 5 in a bucket-like manner via the main rope 3.

[0016] One end 3a of the main rope 3 is attached to the machine beam 110 via a thimble rod. The main rope 3 extends from the machine beam 110 toward the car side pulley 2a. The main rope 3 is wound around the car side pulley 2a, the sheave 4a, and the weight side pulley 10 in this order from the one end 3a.

[0017] Similarly to the one end 3a, the other end 3b of the main rope 3 extending from the weight-side pulley 10 toward the top of the hoistway 100 is attached to the machine beam 110 via a thimble rod. When the hoisting machine 4 is driven, the car 2 and the counterweight 5 move up and down in the hoistway 100. The counterweight 5 moves up and down along the wall surface 101 of the hoistway 100.

[0018] The hoist 4, the cage side pulley 2a, and the weight side pulley 10 can each be configured as a rotating body of the present invention. In the following, the configuration of the rotating body of the present invention will be described using the weight side pulley as an example of the rotating body of the present invention.

[0019] 1-2. Example of weight pulley (rotating body) configuration Next, the configuration of the weight-side pulley 10 will be described with reference to Fig. 2. Fig. 2 is a cross-sectional configuration diagram of the weight-side pulley 10.

[0020] As shown in Fig. 2, the weight-side pulley 10 has a main shaft 13, a pulley body 11, and a bearing 15. The main shaft 13 is formed in a cylindrical shape. Support brackets (not shown) are attached to both axial ends of the main shaft 13. The main shaft 13 is attached to the counterweight 5 via the support brackets.

[0021] One axial end of the main shaft 13 faces the wall surface 101 of the hoistway 100. The other axial end of the main shaft 13 faces the side opposite the wall surface 101 of the hoistway 100, i.e., the car 2 side.

[0022] A pulley body 11 is rotatably supported on an outer circumferential surface 13a of the main shaft 13 via a bearing 15. The pulley body 11 has a winding portion 16 and a boss portion 12. The boss portion 12 is disposed at the radial center of the pulley body 11, and the winding portion 16 is disposed on the radial outside of the pulley body 11. The boss portion 12 and the winding portion 16 are connected via a rib 19.

[0023] The boss portion 12 is formed in a cylindrical shape. A bearing 15 is disposed in the cylindrical hole 12a of the boss portion 12. A disk-shaped first fixing member 17 is disposed at one axial end of the boss portion 12 and the bearing 15, and a disk-shaped second fixing member 18 is disposed at the other axial end of the boss portion 12 and the bearing 15. As a result, the cylindrical hole 12a of the boss portion 12 is surrounded by the first fixing member 17 and the second fixing member 18. A lubricant 14 is injected into the space surrounded by the cylindrical hole 12a of the boss portion 12 and the first fixing member 17 and the second fixing member 18.

[0024] In this embodiment, the first fixing member 17 is attached to one end of the boss portion 12 via a liquid gasket 32 ​​and fixed by a first fixing bolt 27. The liquid gasket 32 ​​is made of a material that hardens from a liquid state, for example, by drying over time, and is also called a FIPG (Formed in Place Gasket). This liquid gasket 32 ​​has a sealing effect and is used to fix the first fixing member 17 to one end of the bearing 15 in an oil-tight manner.

[0025] The first fixing bolt 27 is fixed to a first bolt hole 22 provided in the first fixing member 17 and the boss portion 12. The first bolt hole 22 is composed of a first fixing member side bolt hole 20 and a first boss portion side bolt hole 21 that communicates with the first fixing member side bolt hole 20.

[0026] The first fixing member bolt hole 20 is provided so as to penetrate the first fixing member 17 in the axial direction of the spindle 13. The first boss bolt hole 21 is formed along the axial direction of the spindle 13 from the face of the boss 12 on the first fixing member 17 side (one side). The first boss bolt hole 21 is provided to a depth that allows the first fixing bolt 27 to be fastened. The first fixing member bolt hole 20 is formed as a drilled hole having a diameter that allows the first fixing bolt 27 to be inserted therethrough. Meanwhile, the first boss bolt hole 21 is provided with a female thread that screws into the first fixing bolt 27. By screwing the first fixing bolt 27 into the first bolt hole 22 configured as described above, the first fixing member 17 can be fixed to one end of the boss 12.

[0027] Moreover, the boss portion 12 and the second fixing member 18 are provided with ventilation holes 25 communicating with the first bolt hole 22. The ventilation holes 25 are composed of a boss portion side ventilation hole 24 and a second fixing member side ventilation hole 23 communicating with the boss portion side ventilation hole 24. The boss portion side ventilation hole 24 extends in the axial direction of the main shaft 13 in the boss portion 12 and is provided continuously from the first boss portion side bolt hole 21 to the other end side of the boss portion 12. The second fixing member side ventilation hole 23 is provided so as to penetrate the second fixing member 18 in the axial direction of the main shaft 13. Moreover, the boss portion side ventilation hole 24 and the second fixing member side ventilation hole 23 are formed as drilled holes having substantially the same diameter as the diameter of the first bolt hole 22. That is, no female thread is provided on the inner peripheral surface of the ventilation hole 25.

[0028] The first fixing member bolt hole 20, the first boss bolt hole 21, the boss vent hole 24, and the second fixing member vent hole 23 are provided so that the centers of the holes are on the same axis. In this embodiment, the first bolt holes 22 and the vent holes 25 are provided at equal intervals in a concentric circle with the center of the main shaft 13 as the central axis, and the first fixing member 17 is fixed by a plurality of first fixing bolts 27. In this embodiment, the first bolt hole 22 communicates with a space different from the space in which the bearing 15 is provided by the vent hole 25. For this reason, the structure is such that the air in the first bolt hole 22 is released to the outside by the vent hole 25.

[0029] On the other hand, the second fixing member 18 is fixed to the other end of the boss portion 12 by a second fixing bolt 28. The second fixing bolt 28 is fixed to a second bolt hole 31 provided in the second fixing member 18 and the boss portion 12. The second bolt hole 31 is composed of a second fixing member side bolt hole 29 and a second boss portion side bolt hole 30.

[0030] The second fixing member bolt hole 29 is provided so as to penetrate the second fixing member 18 in the axial direction of the spindle 13. The second boss portion bolt hole 30 is formed along the axial direction of the spindle 13 from the face of the boss portion 12 on the second fixing member 18 side (the other side). The second boss portion bolt hole 30 is provided with a depth that allows the second fixing bolt 28 to be fastened. The second fixing member bolt hole 29 is also configured as a drilled hole with a diameter that allows the second fixing bolt 28 to be inserted therethrough. Meanwhile, the second boss portion bolt hole 30 is provided with a female thread that screws into the second fixing bolt 28.

[0031] A plurality of second bolt holes 31 are provided at equal intervals in a concentric circle with the center of main shaft 13 as the central axis, and are provided between two adjacent air holes 25 at positions that do not overlap with air holes 25. This ensures that the formation positions of second bolt holes 31 do not interfere with air holes 25. By screwing second fixing bolt 28 into second bolt hole 31 configured as described above, second fixing member 18 can be fixed to one end of boss portion 12.

[0032] A rib 19 is formed on the outer circumferential surface of the boss portion 12. The rib 19 is formed in the axial middle portion of the outer circumferential surface of the boss portion 12. The rib 19 extends radially outward from the outer circumferential surface of the boss portion 12. The rib 19 connects the boss portion 12 and the winding portion 16.

[0033] The winding portion 16 is formed in a cylindrical shape. A groove 16a around which the main rope 3 is wound is formed on the outer circumferential surface of the winding portion 16. A rib 19 is connected to an inner wall surface 16b of the winding portion 16. The rib 19 is located in the middle of the inner wall surface 16b in the axial direction.

[0034] The pulley body 11 is formed by casting, so that the winding portion 16 and the boss portion 12 are integrally formed.

[0035] 1-3.How to assemble the weight side pulley In this embodiment, when attaching to one end of boss portion 12, first, liquid gasket 32 ​​in a liquid state is applied to the portion of one end of boss portion 12 where first fixing member 17 is to be fixed. Then, before liquid gasket 32 ​​hardens, first fixing member 17 is attached to one end of boss portion 12. At this time, the first fixing member bolt hole 20 is aligned with the first boss portion bolt hole 21.

[0036] Thereafter, first fixing bolt 27 is inserted through first fixing member bolt hole 20, and first fixing bolt 27 is screwed into first boss bolt hole 21. This makes it possible to fix first fixing member 17 to one end of boss portion 12. Then, over time, the liquid gasket dries, and first fixing member 17 is fixed to one end of boss portion 12 while maintaining better oil-tightness.

[0037] In this embodiment, the first bolt hole 22 into which the first fixing bolt 27 screws is a space different from the space in which the bearing 15 is provided, and is connected by the air vent 25 to a space outside the pulley body 11 through which air flows. This makes it possible to prevent the sealing ability of the liquid gasket 32 ​​from being impaired when the first fixing bolt 27 is screwed into the first bolt hole 22 to fix the first fixing member 17. The reason for this will be explained below with reference to a comparative example.

[0038] 1-4. Configuration of weight-side pulley according to comparative example Fig. 11 is a cross-sectional view of the weight-side pulley 300 according to the comparative example. In Fig. 11, the parts corresponding to Fig. 2 are given the same reference numerals, and the duplicated explanation is omitted. In the weight-side pulley 300 according to the comparative example, the first bolt hole 22 does not communicate with the vent hole. That is, in the weight-side pulley 300 according to the comparative example, the first bolt hole 22 for fixing the first fixing member 17 fixed to the side where the liquid gasket 32 ​​is provided is different from the first bolt hole 22 of the first embodiment in that it does not communicate with a space different from the space where the bearing 15 is provided.

[0039] 12A and 12B are diagrams showing the state of assembly of the weight-side pulley 300 according to the comparative example. First, as shown in FIG. 12A, the liquid gasket 32 ​​is applied to one end of the boss portion 12. Next, as shown in FIG. 12B, before the liquid gasket 32 ​​hardens, the first fixing member 17 is aligned with one end of the boss portion 12 and fixed with the first fixing bolt 27. At this time, air inside the first bolt hole 22 (the portion surrounded by the dashed line C in FIG. 12B) leaks out from the fastening surface (here, between the liquid gasket 32 ​​and one end of the boss portion 12, a, and between the liquid gasket 32 ​​and the first fixing member 17, b). This causes a defect in the liquid gasket 32, which causes a problem of reduced oil sealing ability due to the defective portion. If the oil sealing ability of the liquid gasket 32 ​​decreases, the centrifugal force generated when the weight side pulley 300 rotates may cause the lubricant 14 used in the bearing 15 to leak from between the liquid gasket 32 ​​and the boss portion 12 (a), or between the liquid gasket 32 ​​and the first fixed member 17 (b), resulting in a malfunction.

[0040] In contrast, in the weight-side pulley 10 of this embodiment shown in FIG. 2, the first fixing member 17 fixed to the side where the liquid gasket 32 ​​is provided is fixed by the first fixing bolt 27 using the first bolt hole 22 communicating with the vent hole 25. Since the vent hole 25 communicates with a space where air flows, when the first fixing bolt 27 is inserted into the first bolt hole 22, the air inside the first bolt hole 22 is discharged to the outside of the second fixing member 18 through the vent hole 25. This makes it possible to prevent air from leaking between the liquid gasket 32 ​​and the boss portion 12, or between the liquid gasket 32 ​​and the first fixing member 17. As a result, it is possible to prevent defects from occurring in the liquid gasket 32, and to ensure oil sealing properties.

[0041] 2. Second embodiment Next, a weight-side pulley according to a second embodiment of the present invention will be described. Fig. 3 is a cross-sectional view of a weight-side pulley 40 according to the second embodiment of the present invention. In Fig. 3, parts corresponding to those in Fig. 2 are given the same reference numerals, and duplicated explanations will be omitted.

[0042] In the weight-side pulley 40 according to the second embodiment, a female thread is provided on the inner peripheral surface of the first fixing member-side bolt hole 41 constituting the first bolt hole 42, into which the first fixing bolt 27 screws. As shown in Fig. 3, the first fixing member-side bolt hole 41 is provided with a female thread, so that the first fixing bolt 27 is also screwed and fixed to the first fixing member 17, and therefore the fixing strength of the first fixing member 17 can be increased compared to the weight-side pulley 10 according to the first embodiment.

[0043] Meanwhile, the second fixing member side bolt hole 43 constituting the second bolt hole 47 also has a female thread on its inner circumferential surface for screwing in the second fixing bolt 28. Since the second bolt hole 47 is fixed by screwing in the second fixing member side bolt hole 43 provided with a female thread and the second boss portion side bolt hole 30, the fixing strength of the second fixing member 18 can be increased compared to the weight-side pulley 10 according to the first embodiment.

[0044] Also in the weight-side pulley 40 according to the second embodiment, the first bolt hole 42 communicates with the vent hole 25 that is open to a space where air flows, so that it is possible to prevent the liquid gasket 32 ​​from being damaged when the first fixing bolt 27 is fixed. This makes it possible to prevent leakage of the lubricant 14 when the weight-side pulley 40 rotates.

[0045] 3. Third embodiment Next, a weight-side pulley according to a third embodiment of the present invention will be described. Fig. 4 is a cross-sectional view of a weight-side pulley 50 according to the third embodiment of the present invention. In Fig. 4, parts corresponding to those in Fig. 2 are given the same reference numerals, and duplicated explanations will be omitted.

[0046] In weight-side pulley 50 according to the third embodiment, boss-side vent hole 49 constituting vent hole 48 communicating with first bolt hole 22 is formed with the same diameter as first boss-side bolt hole 21, and has a female thread on its inner circumferential surface, similar to first boss-side bolt hole 21. In this embodiment as well, boss-side vent hole 49 is provided in boss 12, extending in the axial direction of main shaft 13, and is provided continuously from first boss-side bolt hole 21 to the other end side of boss 12.

[0047] In this embodiment, the boss side vent hole 49 is formed with the same screw hole as the first boss side bolt hole 21, so the first boss side bolt hole 21 and the boss side vent hole 49 can be machined in the same process. This allows the number of processes in machining the first boss side bolt hole 21 and the boss side vent hole 49 to be reduced compared to the first embodiment. In addition, the present embodiment has the same effects as the first embodiment.

[0048] 4. Fourth embodiment Next, a weight-side pulley according to a fourth embodiment of the present invention will be described. Fig. 5A is a configuration diagram of a weight-side pulley 60 according to the fourth embodiment of the present invention as viewed from the first fixed member 17 side, and Fig. 5B is a configuration diagram of the weight-side pulley 60 according to the fourth embodiment of the present invention as viewed from the second fixed member 18 side. Fig. 6 is a cross-sectional configuration diagram taken along line AB in Figs. 5A and 5B. In Figs. 5A, 5B, and 6, parts corresponding to those in Fig. 2 are given the same reference numerals, and duplicated explanations will be omitted.

[0049] In the weight-side pulley 60 according to the fourth embodiment, the second fixing member 18 is also fixed to the other end of the boss portion 12 by the second fixing bolt 28 via a liquid gasket 33, similar to the first fixing member 17. In addition, in the fourth embodiment, the boss portion 12 and the first fixing member 17 are provided with an air hole 63 provided so as to communicate with the second bolt hole 31. The air hole 63 is composed of a boss portion side air hole 61 and a first fixing member side air hole 62 which communicates with the boss portion side air hole 61.

[0050] The boss side vent hole 61 extends in the boss portion 12 in the axial direction of the spindle 13 and is provided continuously from the second boss side bolt hole 30 to one end side of the boss portion 12. The first fixed member side vent hole 62 is provided so as to penetrate the first fixed member 17 in the axial direction of the spindle 13. The boss side vent hole 61 and the first fixed member side vent hole 62 are formed as drilled holes of approximately the same diameter as the diameter of the first bolt hole 22. In other words, no female thread is provided on the inner peripheral surface of the vent hole 63.

[0051] 5A and 5B, first bolt hole 22 and vent hole 25 communicating with first bolt hole 22, and second bolt hole 31 and vent hole 63 communicating with second bolt hole 31 are provided alternately at equal intervals on a concentric circle about center O of main shaft 13. As a result, first bolt hole 22 and vent hole 25 communicating with first bolt hole 22, and second bolt hole 31 and vent hole 63 communicating with second bolt hole 31 are provided at positions that do not interfere with each other.

[0052] In the fourth embodiment, the first fixed member bolt hole 20 and the first fixed member vent hole provided in the first fixed member 17 may be drilled holes of the same diameter. Furthermore, the second fixed member bolt hole 29 and the second fixed member vent hole 23 provided in the second fixed member 18 may be drilled holes of the same diameter. This eliminates the need to separately create the first fixed member bolt hole 20 and the first fixed member vent hole 62, and the second fixed member bolt hole 29 and the second fixed member vent hole 23 in the first fixed member 17 and the second fixed member 18, respectively, and reduces the number of processing steps.

[0053] In the fourth embodiment, the first fixing member 17 and the second fixing member 18 are fixed via the liquid gasket 33 at both ends of one end and the other end of the boss portion 12. The first fixing bolt 27 that fixes the first fixing member 17 is fixed to the first bolt hole 22 that communicates with the ventilation hole 25, and the second fixing bolt 28 that fixes the second fixing member 18 is fixed to the second bolt hole 31 that communicates with the ventilation hole 63. Therefore, when the second fixing bolt 28 is fixed at the other end of the boss portion 12, the air inside the second bolt hole 31 passes through the ventilation hole 63 and is discharged to the outside of the pulley body 11. This makes it possible to prevent the liquid gasket 33 from being damaged by the air pressure at the time of bolt fixing at the other end of the boss portion 12. In addition, the same effects as those of the first embodiment can be obtained.

[0054] In the above-mentioned first to fourth embodiments, the weight side pulley of the elevator 1 has been described as an example of a rotating body of the present invention, but the configuration of the present invention can be applied to any rotating body having a bearing. In the following, the configuration of the present invention will be described using, for example, a rotating body used inside the hoisting machine 4 of the elevator 1 as an example.

[0055] 5. Fifth embodiment Next, a rotating body according to a fifth embodiment of the present invention will be described. Fig. 7 is a cross-sectional configuration diagram of a rotating body 70 according to a fifth embodiment of the present invention. In Fig. 7, the same reference numerals are used for parts corresponding to Fig. 2, and duplicated explanations will be omitted. The rotating body 70 according to the fifth embodiment differs from the first embodiment in that the second fixing member 18 in the first embodiment is not provided.

[0056] In the fifth embodiment, a first fixing member 17 is provided at one end of the boss portion 12. Meanwhile, a sealing member 71 such as an oil seal that oil-tightly seals the cylindrical hole 12a is provided on the inner circumferential surface of the cylindrical hole 12a at the end side of the boss portion 12.

[0057] In the rotating body 70 according to the fifth embodiment, the first bolt hole 22 also communicates with an air vent 72 provided in the boss portion 12. The air vent 72 is provided continuously from the first boss-side bolt hole 21 to one end side of the boss portion 12 and is provided so as to penetrate the boss portion 12. The air vent 72 is configured as a drilled hole having the same diameter as the first boss-side bolt hole 21. In the fifth embodiment, the air vent 72 opens the first bolt hole 22 to a space different from the space on the other end side of the boss portion 12 in which the bearing 15 is provided.

[0058] In the fifth embodiment, since the second fixing member 18 (see FIG. 2) is not provided, the rotating body 70 can be made thinner, and this configuration is particularly effective when there is a desire to prevent oil leakage from one end side of the boss portion 12. In the fifth embodiment, the same effects as those of the first embodiment can be obtained.

[0059] 6. Sixth embodiment Next, a rotating body 80 according to a sixth embodiment of the present invention will be described. Fig. 8 is a cross-sectional configuration diagram of a rotating body 80 according to the sixth embodiment of the present invention. In Fig. 8, parts corresponding to Figs. 2 and 7 are given the same reference numerals, and duplicated explanations will be omitted. The rotating body 80 according to the sixth embodiment is an example in which the configuration of the ventilation holes 81 is different from that of the fifth embodiment.

[0060] In the rotating body 80 according to the sixth embodiment, the first bolt hole 22 also communicates with an air vent 81 provided in the boss portion 12. The air vent 81 is provided continuously from the first boss-side bolt hole 21 to the other end side of the boss portion 12, and is provided so as to penetrate the boss portion 12. The air vent 81 is formed as a drilled hole having a diameter φd smaller than the diameter φD of the first boss-side bolt hole 21. In the sixth embodiment, the air vent 81 opens the first bolt hole 22 to a space different from the space on the other end side of the boss portion 12 in which the bearing 15 is provided.

[0061] In the rotating body according to the sixth embodiment, the diameter φd of the vent hole 81 is configured to be smaller than the diameter φD of the first boss portion-side bolt hole 21. Therefore, compared to the rotating body 70 according to the fifth embodiment, the rigidity of the boss portion 12 can be maintained, and the vent hole 81 can be formed while maintaining the strength of the boss portion 12. In addition, the same effects as those of the fifth embodiment can be obtained.

[0062] 7. Seventh embodiment Next, a rotating body 90 according to a seventh embodiment of the present invention will be described. Fig. 9 is a cross-sectional configuration diagram of a rotating body 90 according to the seventh embodiment of the present invention. In Fig. 9, parts corresponding to Figs. 1 and 5 are given the same reference numerals, and duplicated explanations will be omitted. The rotating body 90 according to the seventh embodiment is an example in which the configuration of the ventilation holes 91 is different from that of the sixth embodiment.

[0063] In the rotating body 90 according to the seventh embodiment, the first bolt hole 22 also communicates with an air vent 91 provided in the boss portion 12. The air vent 91 is a drilled hole extending from the bottom side of the first boss-side bolt hole 21 toward the outside in the radial direction of the boss portion 12 so as to penetrate through the outer circumferential surface of the boss portion 12. The air vent 91 is provided at a position that does not overlap with the end of the first fixing bolt 27 when the first fixing bolt 27 is screwed into the first bolt hole 22. In the seventh embodiment, the first bolt hole 22 is opened to the space on the outer circumferential surface side of the boss portion 12 by the air vent 91.

[0064] In the rotating body 90 according to the seventh embodiment, the vent hole 91 is configured as a drilled hole extending in the radial direction of the boss portion 12. This allows the length of the vent hole 91 to be shorter than that of a vent hole provided in the boss portion 12 so as to extend in the axial direction of the main shaft 13, making processing easier. In addition, since the vent hole 91 does not penetrate to the other end side of the boss portion 12, even if another component is provided on the other end side of the boss portion 12, the position of the vent hole 91 does not restrict the configuration position of the other component.

[0065] Also, for example, when the second fixed member 18 is provided like the weight-side pulley 10 in the first embodiment, it is possible to combine the configuration of the vent hole 91 according to the seventh embodiment. In this case, since it is not necessary to provide the second fixed member side vent hole 23 in the second fixed member 18, there is no need to align the holes with each other. This increases the degree of freedom in design. In addition, the same effects as those of the first and fifth embodiments can be obtained.

[0066] As described above, in the first to fourth embodiments, the first fixed member 17, the boss portion 12, and the second fixed member 18 are fixed to one another, and in the fifth to seventh embodiments, the first fixed member 17 and the boss portion 12 are fixed to one another. Below, more generalized embodiments of the rotating body of the present invention will be described.

[0067] 8. Eighth embodiment FIG. 10 is a schematic diagram of a main part of a rotating body 200 according to an eighth embodiment of the present invention. The rotating body 200 according to the eighth embodiment is a rotating body having a bearing (not shown). The rotating body has a first structure 202 having a bolt hole 203, and a second structure 201 fixed to one end side by a bolt 207 via a liquid gasket 205. The first structure 202 is formed with an air hole 206 communicating with the bolt hole 203. The opening of the air hole 206 on the opposite side to the opening communicating with the bolt hole 203 is opened to a space different from the space in which the bearing of the first structure 202 is provided. The second structure 201 is provided with a bolt hole 204 through which the bolt 207 is inserted. The bolt hole 204 communicates with the bolt hole 203. The second structure 201 is provided so as to seal the space in which the bearing is provided.

[0068] In the eighth embodiment, the bolt holes 204 and 203 also communicate with the vent hole 206 that is open to a space different from the space in which the bearing is provided. In the eighth embodiment, the bolt 207 is screwed into the bolt holes 204 and 203. At this time, if the liquid gasket 205 is applied so as to close the bolt hole 203 as shown in FIG. 10, the bolt is screwed through the liquid gasket 205. In this embodiment, when the bolt 207 is screwed into the bolt holes 203 and 204, the air inside is discharged to the outside (a space different from the space in which the bearing is provided) through the vent hole 206. This makes it possible to prevent the liquid gasket 205 from being damaged by the air pressure generated when the bolt 207 is screwed.

[0069] In this way, the effects of the present invention can be obtained by providing an air vent 206 in a rotating body 200 having a bearing and lubricant supplied around the bearing, for releasing air inside the bolt holes 204, 203 to a space other than the space in which the bearing is provided.

[0070] The above-mentioned embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the configurations described. For example, it is possible to replace a part of the configuration of the embodiment with another configuration, and it is also possible to add another configuration to the configuration of the embodiment. Also, it is possible to add, delete, or replace a part of the configuration of the embodiment with another configuration. [Explanation of symbols]

[0071]

[0033] 1... elevator, 3... main rope, 4... hoist, 4a... sheave, 10... weight side pulley, 11... pulley body, 12... boss portion, 12a... cylindrical hole, 13... main shaft, 14... lubricant, 15... bearing, 17... first fixed member, 18... second fixed member, 19... rib, 20... first fixed member side bolt hole, 21... first boss portion side bolt hole, 22... first bolt hole, 23... second fixed member side vent, 24... boss portion side vent, 25... vent , 26...ventilation hole, 27...first fixing bolt, 28...second fixing bolt, 29...second fixing member side bolt hole, 30...second boss portion side bolt hole, 31...second bolt hole, 32...liquid gasket, 33...liquid gasket, 70...rotating body, 71...sealing member, 201...second structure, 202...first structure, 203, 204...bolt hole, 205...liquid gasket, 206...ventilation hole, 207...bolt, 300...weight side pulley

Claims

1. A main shaft that serves as the axis of rotation; a first structure rotatably supported on the main shaft via a bearing; a second structure attached to the first structure via a liquid gasket and sealing a space in which the bearing is provided; A bolt hole provided from the second structure to the first structure; a fixing bolt that is screwed into the bolt hole and fixes the second structure to the first structure; an air vent provided in the first structure, communicating with the bolt hole and communicating with a space in which air flows, the space being different from a space in which the bearing is provided; A rotating body comprising:

2. The vent hole has a diameter smaller than the diameter of the bolt hole. The rotating body according to claim 1 .

3. The air vent is provided so as to extend in a direction different from the extending direction of the bolt hole. The rotating body according to claim 1 .

4. The air vent is provided so as to extend in the same direction as the bolt hole. The rotating body according to claim 1 .

5. The vent hole is provided with a female thread similar to the bolt hole. The rotating body according to claim 1 .

6. A third structure attached via a liquid gasket to a portion of the first structure different from the portion to which the second structure is attached, and sealing a space in which the bearing is provided; Another bolt hole provided from the third structure to the first structure side; Another fixing bolt for screwing into the other bolt hole and fixing the third structure to the first structure; another vent hole provided in the first structure, communicating with the other bolt hole and communicating with a space different from the space in which the bearing is provided and through which air flows; Further equipped The rotating body according to claim 1 .

7. A rotating body around which the rope is wound, The rotating body is A main shaft that serves as the axis of rotation; a first structure rotatably supported on the main shaft via a bearing; a second structure attached to the first structure via a liquid gasket and sealing a space in which the bearing is provided; A bolt hole provided from the second structure to the first structure; a fixing bolt that is screwed into the bolt hole and fixes the second structure to the first structure; an air vent provided in the first structure, communicating with the bolt hole and communicating with a space in which air flows, the space being different from a space in which the bearing is provided; An elevator equipped with.

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