Rope connection mechanism and elevator

Abstract

The invention provides a rope connecting mechanism and an elevator, which can prevent a rope from rotating around a central shaft in normal time and can easily adjust the length of the rope during adjustment operation. The rope connection mechanism (20) is provided at an end portion of a rope (15) provided to an elevator. The rope connection mechanism (20) is provided with a rotating shaft (25), a rotating body (26), a cylinder part (24), a bearing part (27), and rotation restricting members (28, 29). The rotating shaft (25) is connected to an end portion (15b) of the rope (15). The rotating body (26) is provided on the rotating shaft (25). A cylinder hole (24b) for accommodating the rotating body (26) is formed in the cylinder part (24). The bearing section (27) supports the rotating body (26) so as to be rotatable about the center axis of the rope (15). The rotation restricting members (28, 29) releasably restrict the rotation of the rotating body about the central axis of the rope.

Description

TECHNICAL FIELD

[0001] The present application relates to a rope connection mechanism and an elevator. BACKGROUND

[0002] Nowadays, an elevator is provided with a car, a counterweight, a main rope connecting the car and the counterweight, and a hoist winding the main rope. Also, the elevator is provided with a governor which always monitors the ascending / descending speed of the car, and functions to operate an emergency stop device provided for the car which reaches a speed above a predetermined speed. Further, the governor is provided with a governor rope connected to the car. Further, the main rope and the governor rope are provided with a rope connection mechanism connecting both end portions.

[0003] Also, the main rope and the governor rope are elongated due to aging deterioration and the like. Therefore, an operation of adjusting the elongation of the main rope and the governor rope is periodically performed. Also, when the elongation of the rope is adjusted, the rope is rotated around the shaft until the lay pitch of the rope, so-called twist of the rope, becomes a standard size.

[0004] As such a technique of adjusting the twist of the rope, for example, there is a technique described in Patent Literature 1. In Patent Literature 1, there is described a technique provided with a rope tension detecting device which detects a rope tension generated by a rope suspended in a shaft with both end portions fixed by a rope stop mechanism as a deformation of an elastic body, and a rope rotating device which rotates the rope around a central shaft in a direction to eliminate the twist of the rope generated by the rope tension according to a value of the rope tension detected by the rope tension detecting device.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Laid-Open No. 2016-84199 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] However, in the technique described in Patent Literature 1, there is a concern that the rope rotates around the central shaft against the user's intention in a normal state. As a result, as in the technique described in Patent Literature 1, there is a concern that the rope is elongated by the rotation of the rope in the normal state, and thus there is a problem that the adjustment of the length of the rope cannot be easily performed.

[0010] In view of the above-described problems, an object of the present application is to provide a rope connection mechanism and an elevator which can prevent the rotation of the rope around the central shaft in the normal state and can easily perform the adjustment of the length of the rope at the time of adjustment operation.

[0011] SOLUTION TO THE PROBLEM

[0012] To solve the above problems and achieve the object of the present application, a rope connecting mechanism is provided at an end portion of a rope of an elevator. The rope connecting mechanism includes a rotating shaft connected to the end portion of the rope, a rotating body provided at the rotating shaft, a cylindrical portion having a cylindrical hole in which the rotating body is accommodated, and a bearing portion that supports the rotating body so as to be rotatable about a central axis of the rope. The rope connecting mechanism further includes a rotation restricting member that restricts rotation of the rotating body about the central axis of the rope in a releasable manner.

[0013] Further, the elevator includes a hoist body that is hoisted in a hoistway, a main rope connected to the hoist body, a governor that monitors a hoisting speed of the hoist body and has a governor rope that moves in a loop along with hoisting operation of the hoist body, and a rope connecting mechanism connected to an end portion of the main rope or an end portion of the governor rope. As the rope connecting mechanism, the above-described rope connecting mechanism is applied.

[0014] Effects of the present application are as follows.

[0015] According to the rope connecting mechanism and the elevator described above, rotation of the rope about the central axis is prevented during normal operation, and adjustment of the length of the rope is easily performed during adjustment work. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic configuration view of an elevator according to a first embodiment.

[0017] Figure 2 is a front view of a rope connecting mechanism according to the first embodiment.

[0018] Figure 3 is a front view showing a state after the rope connecting mechanism according to the first embodiment is unlocked.

[0019] Figure 4 is a view showing adjustment operation of a rope using the rope connecting mechanism according to the first embodiment.

[0020] Figure 5 is an explanatory view showing a state after the governor rope is elongated.

[0021] Figure 6 is a front view of a rope connecting mechanism according to a second embodiment.

[0022] Figure 7 is a front view of a rope connecting mechanism according to a third embodiment.

[0023] SYMBOL EXPLANATION

[0024] 2 - car, 3 - main rope, 4 - counterweight, 5 - hoist machine, 6 - deflector sheave, 7 - guide rail, 8 - counterweight side guide rail, 10 - emergency stop device, 12 - upper pulley, 13 - governor, 14 - lower pulley, 15 - governor rope, 15a - one end portion, 15b - other end portion, 15c - strand spacing, 20, 30, 40 - rope connecting mechanism, 21 - connecting rod, 22, 32 - rotation support portion, 22a, 32a - insertion hole, 23, 33 - connecting portion, 23a, 33a - rotation shaft, 24, 34 - cylinder portion, 24a, 34a - fixing hole, 24b, 34b - cylinder hole, 25, 35 - rotation shaft, 26, 36 - rotation body, 26a, 36a - rotation restriction hole, 27, 37 - bearing portion, 28, 38 - fixing bolt, 29, 39 - fixing nut, 42 - first rotation support portion, 43 - connecting portion, 43a - rotation shaft, 44 - first cylinder portion, 45 - first rotation shaft, 46 - first rotation body, 47 - first bearing portion, 48 - first fixing bolt, 49 - first fixing nut, 52 - second rotation support portion, 54 - second cylinder portion, 55 - second rotation shaft, 56 - second rotation body, 57 - second bearing portion, 58 - second fixing bolt, 59 - second fixing nut, 100 - elevator. DETAILED DESCRIPTION

[0025] Hereinafter, referring to Figures 1-7 A rope connecting mechanism and an elevator according to an embodiment example will be described. In addition, in each drawing, the same reference signs are attached to common components.

[0026] 1. First embodiment example

[0027] 1-1. Structure example of elevator

[0028] First, a structure of an elevator according to a first embodiment example (hereinafter, referred to as "this example") will be described. Figure 1

[0029] Figure 1 is a brief structure diagram showing a structure example of an elevator.

[0030] As shown in Figure 1 , the elevator 100 of this example is provided in a hoistway 100 formed in a building structure.

[0031] As shown in Figure 1 , the elevator 100 of this example is a so-called 1:1 roping ratio elevator. The elevator 100 is provided with a car 2 showing an example of a car in which a person or a cargo is placed, a main rope 3, a counterweight 4, and a hoist machine 5. In addition, the elevator 100 is provided with an emergency stop device 10 and a governor 13.

[0032] ​A hoist 5 is provided in a machine room 102 provided at the top of the shaft 100. A main rope 3 is wound around a sheave of the hoist 5. Further, a deviation pulley 6 for installing the main rope 3 is provided in the vicinity of the hoist 5.

[0033] An upper portion of the car 2 is connected to one end of the main rope 3, and an upper portion of the counterweight 4 is connected to the other end of the main rope 3. By driving the hoist 5, the car 2 and the counterweight 4 are moved up and down in the shaft. Hereinafter, the direction in which the car 2 and the counterweight 4 are moved up and down will be referred to as the vertical direction.

[0034] The car 2 is supported by two guide rails 7, 7 so as to be slidable via a guide device. Also, the counterweight 4 is supported by a counterweight-side guide rail 8 so as to be slidable via a guide device. The guide rails 7 and the counterweight-side guide rail 8 extend in the vertical direction in the shaft 100.

[0035] Further, two emergency stop devices 10 for emergency stopping of the up-and-down movement of the car 2 are provided in a lower portion of the car 2. The emergency stop devices 10 are disposed in the lower portion of the car 2 at positions opposite to the guide rails 7.

[0036] Further, the speed regulator 13 has an upper pulley 12 and a lower pulley 14. The upper pulley 12 is provided in the machine room 102. A speed detection mechanism, not shown, is provided in the upper pulley 12. The lower pulley 14 is provided in a pit 101 which is a lower portion of the shaft 100. Further, the lower pulley 14 is disposed below the upper pulley 12 in the vertical direction.

[0037] A speed regulator rope 15 is wound around the upper pulley 12 and the lower pulley 14. A tensioning counterweight is attached to the lower pulley 14. Therefore, the lower pulley 14 is applied with a predetermined load toward the lower side in the vertical direction by the tensioning counterweight. Also, a predetermined tension is imparted to the speed regulator rope 15 wound around the lower pulley 14 via the lower pulley 14.

[0038] Both ends of the speed regulator rope 15 in the axial direction are connected by a rope connecting mechanism 20, and are formed in a so-called endless shape. The rope connecting mechanism 20 is connected to the emergency stop devices 10 provided in the car 2 via a connecting rod 21. Also, the speed regulator rope 15 is moved in a circulating manner between the upper pulley 12 and the lower pulley 14 in accordance with the up-and-down movement of the car 2. Also, the upper pulley 12 detects the up-and-down speed of the car 2 in accordance with the circulating speed of the speed regulator rope 15.

[0039] 1-2. Structure Example of Rope Connecting Mechanism

[0040] Next, the structure of the rope connecting mechanism 20 will be described with reference to Figure 2 The structure of the rope connecting mechanism 20 will be described.

[0041] Figure 2 is a front view showing the rope connecting mechanism 20.

[0042] like Figure 2 As shown, the rope connection mechanism 20 includes a rotating support portion 22, a connecting portion 23, a cylindrical portion 24, a rotating shaft 25, a rotating body 26, a bearing portion 27, a fixing bolt 28 (showing a rotation limiting member), and a fixing nut 29. The rotating support portion 22 is located at the lower end in the vertical direction, and the connecting portion 23 is located at the upper end in the vertical direction. The connecting portion 23 is connected to the connecting rod 21 via a rotating shaft 23a. Furthermore, the connecting rod 21 rotates around the rotating shaft 23a. Additionally, one end 15a of the speed regulator rope 15 is connected to the connecting portion 23. The other end 15b of the speed regulator rope 15 is connected to the rotating shaft 25.

[0043] The rotating support portion 22 is generally cylindrical. An insertion hole 22a is formed at the axial center of the rotating support portion 22. The insertion hole 22a extends through the rotating support portion 22 from one end to the other in the axial direction. A rotating shaft 25 is inserted into this insertion hole 22a.

[0044] The other end 15b of the speed regulator rope 15 is connected to the lower part of the rotating shaft 25 that protrudes from the rotating support 22 in the upward and downward direction. Furthermore, a rotating body 26 is provided on the side of the rotating shaft 25 opposite to the end 15b of the speed regulator rope 15. Moreover, the rotating body 26 is inserted into the cylinder hole 24b of the cylinder portion 24 described below.

[0045] A cylindrical portion 24 is formed at one axial end of the rotary support portion 22. The cylindrical portion 24 is generally cylindrical. A hollow cylindrical hole 24b is formed in the cylindrical portion 24. The rotary support portion 22 is fixed at the other axial end of the cylindrical portion 24, and a connecting portion 23 is fixed at one axial end of the cylindrical portion 24. A fixing hole 24a is formed on the side portion of the cylindrical portion 24 orthogonal to the axial direction. The fixing hole 24a communicates with the cylindrical hole 24b. The cylindrical hole 24b of the cylindrical portion 24 is formed on the side portion of the cylindrical portion 24 between the two fixing holes 24a. The threaded portion of the fixing bolt 28 is inserted into the fixing hole 24a.

[0046] Furthermore, a bearing portion 27 is disposed on the inner wall surface of the cylindrical bore 24b on the side of the rotation support portion 22 of the cylindrical portion 24. A thrust bearing is used as the bearing portion 27. Moreover, the bearing portion 27 supports the rotating body 26 described below so that it can rotate.

[0047] A rotating body 26 is formed at one end of the rotating shaft 25 along its axial direction. The rotating body 26 is cylindrical. The rotating body 26 is housed within the cylindrical hole 24b of the cylindrical portion 24. The diameter of the rotating body 26 is larger than the opening diameter of the insertion hole 22a provided in the rotating support portion 22. Therefore, it is possible to prevent the rotating body 26 from falling out of the insertion hole 22a of the rotating support portion 22. Furthermore, a rotation limiting hole 26a is formed in the rotating body 26, extending in a direction orthogonal to the axial direction. Moreover, the threaded portion of the fixing bolt 28 is inserted into the rotation limiting hole 26a.

[0048] The threaded portion of the fixing bolt 28 for the rotation limiting component is inserted into the fixing hole 24a and the rotation limiting hole 26a of the cylindrical portion 24. Furthermore, the fixing bolt 28 is fixed to the cylindrical portion 24 via the fixing nut 29. The fixing bolt 28 passes through the rotating body 26 in a direction orthogonal to the axial direction of the rotating body 26, thereby preventing the rotating body 26 and the rotating shaft 25 from rotating against the user's intention.

[0049] Furthermore, in this example, the use of fixing bolt 28 and fixing nut 29 as rotation limiting components has been described, but it is not limited to this. As rotation limiting components, for example, a fixing pin inserted into the rotation limiting hole 26a and fixing hole 24a can be used to restrict the rotation of the rotating body 26 around the central axis of the speed regulating rope 15 in a releasable manner, and various other components can be used.

[0050] 1-3. Adjustment of the speed regulator rope

[0051] Next, refer to Figures 3 to 5 The adjustment of the length of the speed regulating machine rope 15 is explained. Figure 3 This is a front view showing the state after the rope connection mechanism 20 has been released from its lock. Figure 4 This diagram illustrates the adjustment action of the speed regulating machine rope 15 using the rope connection mechanism 20. Figure 5 This is an explanatory diagram showing the state of the speed regulator rope after it has been extended.

[0052] First, such as Figure 5 As shown, the speed regulator rope 15 twists at a predetermined strand pitch (twist length) 15c. Furthermore, when it elongates due to aging or deterioration, the interval of the strand pitch 15c increases. Moreover, as the speed regulator rope 15 elongates, sections with longer and shorter strand pitches 15c are created. Furthermore, when the speed regulator rope 15 passes through the upper pulley 12 and lower pulley 14 at a section with a shorter strand pitch 15c, the tension applied to the speed regulator rope 15 is released, and the strand pitch 15c becomes longer. When this strand pitch 15c becomes longer, abnormal noise is generated. Therefore, it is necessary to periodically adjust the strand pitch 15c of the speed regulator rope 15 and adjust the length of the speed regulator rope 15.

[0053] During the adjustment operation, firstly, the car 1 is moved to the uppermost level of the hoistway 100. As a result, the other end 15b of the speed regulating cable 15 hangs down along the hoistway 100. And, as... Figure 3 As shown, the retaining nut 29 is removed from the retaining bolt 28. Then, the retaining bolt 28 is pulled out from the rotation limiting hole 26a of the rotating body 26 and the retaining hole 24a of the cylindrical part 24. As a result, the rotating body 26 and the rotating shaft 25 connected to the rotating body 26 can rotate about the central axis via the bearing part 27.

[0054] Next, as Figure 4 As shown, the operator rotates the rotating shaft 25 in the direction that the strand spacing 15c of the speed regulator rope 15 becomes shorter. Furthermore, the shortening of the strand spacing 15c of the speed regulator rope 15 allows for adjustment of the length of the speed regulator rope 15.

[0055] Next, the operator measures the strand spacing 15c of the speed regulator rope 15 to confirm whether it is a standard size. Then, once the strand spacing 15c is confirmed to be standard, the operator inserts the threaded portion of the fixing bolt 28 into the fixing hole 24a of the cylinder 24 and the rotation limiting hole 26a of the rotating body 26. Then, a fixing nut 29 is installed on the fixing bolt 28, fixing the fixing bolt 28 to the cylinder 24 and the rotating body 26. This restricts the rotation of the rotating body 26 and the rotating shaft 25. As a result, it prevents the rotating body 26 and the rotating shaft 25 from rotating against the user's intention, thereby preventing the speed regulator rope 15 connected to the rotating shaft 25 from rotating.

[0056] Thus, the elevator 100 with the rope connection mechanism 20 in this example can prevent the speed regulator rope 15 from rotating around the central axis under normal conditions, and the length of the speed regulator rope 15 can be easily adjusted during adjustment operations.

[0057] Here, the car 1 is moved to the uppermost level, and the other end 15b of the speed regulator rope 15 extends along the hoistway 100. As a result, the rotation of the rotating body 26 and the rotating shaft 25 can be easily performed, and the length of the speed regulator rope 15 can be easily adjusted.

[0058] 2. Second Implementation Example

[0059] Next, refer to Figure 6 The rope connection mechanism of the second embodiment will be described.

[0060] Figure 6 This is a front view showing the rope connection mechanism of the second embodiment.

[0061] The difference between the rope connection mechanism 30 of this second embodiment and the rope connection mechanism 20 of the first embodiment lies in the position of the rotating mechanism. Therefore, the parts common to the rope connection mechanism 20 of the first embodiment are marked with the same symbols and repeated descriptions are omitted.

[0062] like Figure 6 As shown, the rope connection mechanism 30 includes a rotating support portion 32, a connecting portion 33, a cylindrical portion 34, a rotating shaft 35, a rotating body 36, a bearing portion 37, a fixing bolt 38 (showing a rotation limiting member), and a fixing nut 39. The rotating support portion 32 is located at the upper end in the vertical direction, and the connecting portion 33 is located at the lower end in the vertical direction. The connecting portion 33 is connected to the connecting rod 21 via the rotating shaft 33a. Furthermore, the other end 15b of the speed regulator rope 15 is connected to the connecting portion 33.

[0063] A rotating shaft 35 is inserted into the insertion hole 32a of the rotating support 32. One end 15a of the speed regulator rope 15 is connected to the upper part of the rotating shaft 35 that protrudes from the rotating support 32 in the upward and downward direction. Furthermore, a rotating body 36 is provided on the side of the rotating shaft 35 opposite to the end 15a connected to the speed regulator rope 15. The rotating body 36 is inserted into the cylinder hole 34b of the cylinder 34.

[0064] A cylindrical portion 34 is formed at the other end of the axial direction of the rotary support portion 32. That is, the rotary support portion 32 is fixed at one end of the axial direction of the cylindrical portion 34, and a connecting portion 33 is fixed at the other end of the axial direction of the cylindrical portion 34. Furthermore, a fixing hole 34a is formed on the side portion of the cylindrical portion 34 that is orthogonal to the axial direction. The threaded portion of the fixing bolt 38 is inserted into the fixing hole 34a.

[0065] Furthermore, a bearing portion 37 is disposed on the inner wall surface of the cylindrical bore 34b of the cylindrical portion 34 on the side near the rotation support portion 32. The bearing portion 37 supports the rotating body 36 so that it can rotate. The rotating body 36 is formed at the other end of the rotation shaft 35 along its axial direction. The rotating body 36 is housed within the cylindrical bore 34b of the cylindrical portion 34. A rotation limiting hole 36a is formed in the rotating body 36, extending in a direction orthogonal to the axial direction. A threaded portion of a fixing bolt 38 is inserted into the rotation limiting hole 36a.

[0066] The threaded portion of the fixing bolt 38 for the rotation limiting component is inserted into the fixing hole 34a and the rotation limiting hole 36a of the cylindrical portion 34. Furthermore, the fixing bolt 38 is fixed to the cylindrical portion 34 via a fixing nut 39. The fixing bolt 38 passes through the rotating body 36 in a direction orthogonal to the axial direction of the rotating body 36, thereby preventing the rotating body 36 and the rotating shaft 35 from rotating against the user's intention.

[0067] In the first embodiment, the rope connection mechanism 20 rotates downwards in the vertical direction, while in the second embodiment, the rope connection mechanism 30 rotates upwards in the vertical direction. Therefore, during the adjustment of the speed regulator rope 15 of the rope connection mechanism 30 in the second embodiment, the car 1 is moved to the lowest level of the hoistway 100. Consequently, one end 15a of the speed regulator rope 15 extends along the hoistway 100. As a result, the rotation of the rotating body 36 and the rotating shaft 35 is easily performed, and the length of the speed regulator rope 15 can be easily adjusted.

[0068] The other structures are the same as those of the rope connection mechanism 20 in the first embodiment described above, so the description of other structures is omitted. In the rope connection mechanism 30 of this second embodiment, the same functions and effects as those of the rope connection mechanism 30 in the first embodiment can also be obtained.

[0069] 3. Third Implementation Example

[0070] Next, refer to Figure 7 The rope connection mechanism of the third embodiment will be described.

[0071] Figure 7 This is a front view showing the rope connection mechanism of the third embodiment.

[0072] The difference between the rope connection mechanism 40 of this third embodiment and the rope connection mechanism 20 of the first embodiment is that a rotating mechanism is provided on both sides in the vertical direction. Therefore, the parts common to the rope connection mechanism 20 of the first embodiment are marked with the same symbols and repeated descriptions are omitted.

[0073] The rope connection mechanism 40 includes a first rotating support portion 42, a connecting portion 43, a first cylindrical portion 44, a first rotating shaft 45, a first rotating body 46, a first bearing portion 47, a first fixing bolt 48 (showing a first rotation limiting member), and a first fixing nut 49. Furthermore, the rope connection mechanism 40 includes a second rotating support portion 52, a second cylindrical portion 54, a second rotating shaft 55, a second rotating body 56, a second bearing portion 57, a second fixing bolt 58 (showing a second rotation limiting member), and a second fixing nut 59.

[0074] A connecting portion 43 is disposed in the middle portion in the vertical direction. A connecting rod 21 is connected to the connecting portion 43 via a rotating shaft 43a. A first rotating support portion 42, a first cylindrical portion 44, a first rotating shaft 45, a first rotating body 46, a first bearing portion 47, a first fixing bolt 48, and a first fixing nut 49 are disposed on the lower side of the connecting portion 43 in the vertical direction. Furthermore, the structure of the first rotating support portion 42, the first cylindrical portion 44, the first rotating shaft 45, the first rotating body 46, the first bearing portion 47, the first fixing bolt 48, and the first fixing nut 49 is the same as that of the rotating support portion 22, the cylindrical portion 24, the rotating shaft 25, the rotating body 26, the bearing portion 27, the fixing bolt 28, and the fixing nut 29 in the first embodiment. Therefore, the description of these components is omitted.

[0075] Furthermore, a second rotary support portion 52, a second cylindrical portion 54, a second rotary shaft 55, a second rotary body 56, a second bearing portion 57, a second fixing bolt 58, and a second fixing nut 59 are arranged on the upper side of the connecting portion 43 in the vertical direction. Moreover, the structures of the second rotary support portion 52, the second cylindrical portion 54, the second rotary shaft 55, the second rotary body 56, the second bearing portion 57, the second fixing bolt 58, and the second fixing nut 59 are the same as those of the rotary support portion 32, the cylindrical portion 34, the rotary shaft 35, the rotary body 36, the bearing portion 37, the fixing bolt 38, and the fixing nut 39 in the second embodiment. Therefore, the description of these components is omitted.

[0076] According to the rope connection mechanism 40 of this third embodiment, both the upper and lower sides rotate in the vertical direction. Therefore, during adjustment operations, the adjustment of the strand spacing 15c of the speed regulator rope 15, i.e., the adjustment of the length of the speed regulator rope 15, can be performed without being affected by the position of the car 1.

[0077] The other structures are the same as those of the rope connection mechanism 20 in the first embodiment described above, so the description of other structures is omitted. In this third embodiment of the rope connection mechanism 40, the same functions and effects as those of the rope connection mechanism 20 in the first embodiment can also be obtained.

[0078] Furthermore, the present invention is not limited to the embodiments described above and shown in the accompanying drawings, and various modifications can be made without departing from the spirit of the invention as set forth in the claims.

[0079] In the above-described implementation examples, the elevator structure is as follows: Figure 1 The example shown illustrates an elevator with a 1:1 rope ratio, but it is not limited to this. Elevators with a 2:1 rope ratio and various other types of elevators can also be used in their construction.

[0080] Furthermore, while a speed regulator rope 15 is used as the rope for installing the rope connection mechanism, it is not a limitation. Various other ropes, such as main ropes and compensating ropes, can be used as the rope for installing the rope connection mechanism. Moreover, when a main rope or compensating rope is used, the rope connection mechanism is located at the end of the main rope or compensating rope that is fixed to the rope head rod connected to the car and the counterweight.

[0081] Furthermore, the terms “parallel” and “orthogonal” are used in this specification, but they do not only mean strictly “parallel” and “orthogonal”. They can be “approximately parallel” and “approximately orthogonal” within the range that still allows them to function, including “parallel” and “orthogonal”.

Claims

1. A rope connection mechanism, disposed at the end of a rope in an elevator, characterized in that, Possessing: a rotation shaft that connects an end portion of the rope; a rotation body that is provided to the rotation shaft; a cylinder portion that is formed with a cylinder hole that accommodates the rotation body; a bearing portion that supports the rotation body so as to be able to rotate around a central axis of the rope; and a rotation restriction member that restricts, in a releasable manner, rotation of the rotation body around the central axis of the rope.

2. The rope connection mechanism according to claim 1, characterized in that: a rotation restriction hole that penetrates in a direction orthogonal to the axial direction is formed in the rotation body, a fixing hole that communicates with the cylinder hole is formed in a side surface portion of the cylinder portion in the direction orthogonal to the axial direction, and the rotation restriction member is inserted into the rotation restriction hole and the fixing hole.

3. The rope connection mechanism according to claim 2, characterized in that: the bearing portion is disposed in the cylinder hole of the cylinder portion.

4. The rope connection mechanism according to claim 1, characterized in that: the rotation shaft has a first rotation shaft that connects another end portion of the rope and a second rotation shaft that connects one end portion of the rope, the rotation body has a first rotation body that is provided to the first rotation shaft and a second rotation body that is provided to the second rotation shaft, the bearing portion has a first bearing portion that supports the first rotation body so as to be able to rotate and a second bearing portion that supports the second rotation body so as to be able to rotate, the rotation restriction member has a first rotation restriction member that restricts, in a releasable manner, rotation of the first rotation body and a second rotation restriction member that restricts, in a releasable manner, rotation of the second rotation body.

5. An elevator, characterized in that Possessing: a hoist body that is hoisted in a hoistway; a main rope that is connected to the hoist body; a speed regulator that monitors a hoisting speed of the hoist body and has a speed regulator rope that cyclically moves in accordance with a hoisting operation of the hoist body; and a rope connection mechanism that is connected to an end portion of the main rope or an end portion of the speed regulator rope, the rope connection mechanism possesses: a rotation shaft that connects the end portion of the main rope or the end portion of the speed regulator rope; a rotation body that is provided to the rotation shaft; a cylinder portion that is formed with a cylinder hole that accommodates the rotation body; a bearing portion that supports the rotation body so as to be able to rotate around a central axis of the rope; and a rotation restriction member that restricts, in a releasable manner, rotation of the rotation body around the central axis of the rope.

6. The elevator according to claim 5, characterized in that: the rope connection mechanism has a connection portion that is connected to the end portion of the speed regulator rope and is connected to a connection lever that is provided to the hoist body.

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