Governor rope pull-up device for elevator

Abstract

To provide a governor rope pull-up device for an elevator, which can prevent damaging of a governor rope when the governor rope is pulled up to float from a governor sheave.SOLUTION: This governor rope pull-up device for the elevator comprises: a fixed structure; a drive sheave rotatably provided in the fixed structure; a rotation prevention mechanism for preventing rotation of the drive sheave in a direction opposite to a direction for pulling up the governor rope; a driven sheave rotatably provided in the fixed structure and disposed to hold the governor rope with the drive sheave; and a moving mechanism. The moving mechanism moves the driven sheave between a sheave pressing position where the governor rope receives a pressing force from the drive sheave and the driven sheave and a sheave releasing position where the governor rope is released from the pressing force of the drive sheave and the driven sheave.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention relate to a speed governor rope hoisting device for an elevator.

Background Art

[0002] A speed governor for stopping a car when the speed of the car moving up and down in an elevator hoistway exceeds the limit is known. The speed governor, also called a governor, includes a speed governor sheave around which a speed governor rope that runs in conjunction with the movement of the car is wound. The speed governor is configured to detect an overspeed of the car from the rotational speed of the speed governor sheave. When an overspeed is detected, the speed governor rope is grasped by a rope gripper. As a result, the running of the speed governor rope stops, and an emergency stop device connected to the speed governor rope is activated. The emergency stop device stops the car on a guide rail that guides the movement of the car.

[0003] On the other hand, a speed governor that stops the running of the speed governor rope without using a rope gripper is known. Such a speed governor includes a sheave rotation stop mechanism that stops the rotation of the speed governor sheave. When the rotation of the speed governor sheave is stopped, the running of the speed governor rope stops due to the frictional force between the speed governor rope and the speed governor sheave. In order to increase the frictional force between the speed governor rope and the speed governor sheave, the outer surface of the speed governor rope may be coated with a friction material or the like.

[0004] During inspection of the speed governor, the speed governor sheave is idled to check the operation of the speed governor. For this reason, during inspection, the speed governor rope is lifted off the speed governor sheave. Tension is applied to the speed governor rope by a tensioner composed of a weight or the like. Therefore, when lifting the speed governor rope off the speed governor sheave, a hand vice is used to grasp and lift the speed governor rope. In this case, there is a possibility that the speed governor rope may be damaged.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] An embodiment aims to provide an elevator governor rope hoisting device that can prevent damage to the governor rope when the governor rope is hoisted and lifted from the governor sheave.

Means for Solving the Problems

[0007] The elevator governor rope hoisting device according to the embodiment is a device for hoisting the governor rope and lifting it from the governor sheave. The elevator governor rope hoisting device includes a fixed structure, a drive sheave rotatably provided on the fixed structure, a rotation prevention mechanism for preventing the drive sheave from rotating in a direction opposite to the direction in which the governor rope is hoisted, a driven sheave rotatably provided on the fixed structure and arranged so as to sandwich the governor rope between the drive sheave and the driven sheave, and a moving mechanism. The moving mechanism moves the driven sheave between a sheave pressing position where the governor rope receives a pressing force from the drive sheave and the driven sheave, and a sheave releasing position where the governor rope is released from the pressing force of the drive sheave and the driven sheave.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, with reference to the drawings, the speed governor rope hoisting device of the elevator in the embodiment of the present invention will be described. First, the elevator device according to the present embodiment will be described.

[0010] As shown in FIG. 1, the elevator device 1 includes a car 2 and a counterweight 3 disposed in a hoistway H. The car 2 and the counterweight 3 are connected via a main rope 4. The main rope 4 is wound around a traction sheave 5a provided on a hoisting machine 5. When the hoisting machine 5 winds up the main rope 4, the car 2 and the counterweight 3 move up and down. The main rope 4 is also wound around a deflecting sheave 6. The hoisting machine 5 is installed in a machine room M provided above the hoistway H. An elevator control device (not shown) is installed in the machine room M. The elevator control device is a device that controls the entire elevator device 1 including the hoisting machine 5. For example, the elevator control device controls the operation of the hoisting machine 5 in response to a landing call and a car call, and lands the car 2 at the landing on the floor where the call is registered.

[0011] Note that the elevator device 1 is not limited to the form shown in FIG. 1. For example, it may be a so-called machine-room-less elevator device. That is, without providing a machine room M, the hoisting machine 5 and the elevator control device may be provided above the hoistway H or the like. Further, the hoisting machine 5 may wind up or pay out the main rope 4 connected to the car 2 without connecting the counterweight 3 to the main rope 4. Even in this case, the hoisting machine 5 can move the car 2 up and down via the main rope 4. That is, the elevator device 1 may be an elevator device not provided with the counterweight 3.

[0012] As shown in FIG. 1, the elevator device 1 includes an emergency stop device 7 and a speed governor of the elevator (hereinafter simply referred to as the speed governor 10). The emergency stop device 7 is attached to the lower part of the car 2. The emergency stop device 7 is connected to a speed governor rope 12, which will be described later, via a connecting member 8. When the car 2 exceeds the speed and the running of the speed governor rope 12 stops, the emergency stop device 7 operates to stop the car 2 on a guide rail (not shown) that guides the up and down movement of the car 2.

[0013] Hereinafter, the speed governor 10 according to the present embodiment will be described. The speed governor 10 is a device for stopping the car 2 when the car 2 exceeds the speed. In the example shown in FIG. 1, the speed governor 10 is provided in the machine room M, but when the elevator device 1 is machine-room-less, it may be provided above the hoistway H or the like.

[0014] As shown in FIGS. 1 and 2, the speed governor 10 includes a housing 11, a speed governor rope 12, a speed governor sheave 13, a tensioner 14, a safety device 15, and a rope gripping mechanism 16.

[0015] The housing 11 may be fixed to the floor of the machine room M shown in FIG. 1. As shown in FIG. 2, the housing 11 may be fixed to the floor of the machine room M via the mounting pedestal 17. The mounting pedestal 17 may include a first pedestal member 17a and a second pedestal member 17b. The first pedestal member 17a may be fixed to the floor of the machine room M, and the second pedestal member 17b may be fixed on the first pedestal member 17a. In the case of a machine roomless elevator, the housing 11 may be fixed to the above-described guide rail. The housing 11 rotatably supports the governor sheave 13 and supports the safety device 15 and the rope gripping mechanism 16.

[0016] As shown in FIG. 1, the governor rope 12 is connected to the car 2 and runs in conjunction with the raising and lowering of the car 2. More specifically, the governor rope 12 is connected to the above-described emergency stop device 7 attached to the lower part of the car 2 via the connecting member 8. Thus, the governor rope 12 is configured to run in synchronization with the raising and lowering of the car 2.

[0017] As shown in FIG. 2, the governor sheave 13 is rotatably attached to the housing 11 via the rotating shaft 18. The governor rope 12 is wound around the governor sheave 13. The governor sheave 13 includes a sheave groove 19. The sheave groove 19 is configured such that the governor rope 12 is inserted and abuts thereon. The cross section of the sheave groove 19 may be formed in a U shape. However, the cross section of the sheave groove 19 may be formed in a V shape and is arbitrary.

[0018] As shown in FIG. 1, the tensioner 14 is disposed at the bottom of the hoistway H and applies tension to the governor rope 12. The tensioner 14 includes a tension sheave 20 and a tension weight 21. The governor rope 12 is wound around the tension sheave 20, and the tension weight 21 is attached to the tension sheave 20. The weight of the tension weight 21 applies tension to the governor rope 12, increasing the frictional force between the governor rope 12 and the governor sheave 13.

[0019] As shown in FIG. 2, a pair of pendulums 22 are attached to the governor sheave 13. The pendulums 22 are attached to the governor sheave 13 via a rotating shaft 23. The pair of pendulums 22 are arranged at positions that are rotationally symmetric with respect to the center of rotation of the governor sheave 13. The rotating shaft 23 is eccentric with respect to the center of gravity of the pendulum 22.

[0020] The portion on the center-of-gravity side of one pendulum 22 and the portion on the side opposite to the center of gravity of the other pendulum 22 are connected by a connecting rod 24. The end portion on the side opposite to the center of gravity of the pendulum 22 to which the connecting rod 24 is connected on the center-of-gravity side is connected to the governor sheave 13 via a governor spring 25. The spring force of the governor spring 25 acts on each pendulum 22 as a force that resists the centrifugal force with which each pendulum 22 tends to open to the outer peripheral side. Each pendulum 22 assumes a posture in which the centrifugal force and the spring force by the governor spring 25 are balanced.

[0021] The safety device 15 is configured to stop the drive of the hoist 5 when the car 2 exceeds the speed. More specifically, the safety device 15 operates when the speed of the car 2 reaches a first speed that is greater than the normal speed, and stops the drive of the hoist 5. For example, the safety device 15 may include an actuator (not shown) and a limit switch 26. The actuator is attached to the pendulum 22 of the governor sheave 13. The actuator is attached to the end portion on the center-of-gravity side of the pendulum 22.

[0022] When the rotational speed of the governor sheave 13 reaches the first rotational speed, the pendulum 22 opens to the outer peripheral side, and the actuator moves to the outer peripheral side. As a result, the actuator comes into contact with a detection lever (not shown) of the limit switch 26. The limit switch 26 emits a signal to stop the drive of the hoist 5 and to activate the brake of the hoist 5. The first rotational speed corresponds to the above-described first speed and is greater than the rotational speed of the governor sheave 13 during normal operation.

[0023] The rope gripping mechanism 16 is configured to grip the governor rope 12 when the car 2 exceeds the speed. More specifically, when the speed of the car 2 reaches a second speed greater than the first speed, it operates to grip the governor rope 12 and stop the running of the governor rope 12.

[0024] The rope gripping mechanism 16 may include a gripping spring 27. When the speed of the car 2 reaches the second speed, a pair of rope grippers (not shown) are configured to grip the governor rope 12 using the spring force of the gripping spring 27. When the governor rope 12 is gripped by the rope gripping mechanism, the emergency stop device 7 operates to stop the running of the car 2.

[0025] In the governor 10 according to the present embodiment, the frictional force may be increased by a resin material formed on the outer surface of the governor rope 12. Examples of the resin material include polyurethane, polyethylene, polyamide, polyvinyl chloride, silicone resin, etc. The resin material may be polyurethane which is excellent in wear resistance and has a high friction coefficient. The resin material is not limited to synthetic resins and may be natural resins such as natural rubber. The weight of the tension weight 21 described above may be made smaller than the weight of the tension weight 21 when no resin material is formed on the outer surface of the governor rope 12.

[0026] Next, with reference to FIGS. 2 to 4, the governor rope hoisting device according to the present embodiment will be described. The governor rope hoisting device (hereinafter referred to as the governor rope hoisting device 30) according to the present embodiment is a device for hoisting the governor rope 12 and floating it from the governor sheave 13 during inspection of the governor 10 or the like.

[0027] As shown in FIGS. 2 to 4, the governor rope hoisting device 30 according to the present embodiment includes a fixed structure 31, a drive sheave 40, an anti-rotation mechanism 50, a driven sheave 60, and a moving mechanism 70.

[0028] As shown in FIG. 2, the fixing structure 31 is detachably attached to the second pedestal member 17b of the mounting pedestal 17 of the speed governor 10 described above. The fixing structure 31 includes bolt holes 32 into which bolts B for fixing to the second pedestal member 17b can be inserted. By means of these bolts B, the fixing structure 31 can be detachably attached to the second pedestal member 17b.

[0029] The fixing structure 31 may be formed in an L shape. More specifically, the fixing structure 31 may include a base portion 33 that abuts against the second pedestal member 17b, and a wall portion 34 that extends upward from the base portion 33. The wall portion 34 may be perpendicular to the base portion 33. The above-described bolt holes 32 are formed in the base portion 33. As shown in FIGS. 3 and 4, a notch portion 35 for passing the speed governor rope 12 is formed in the base portion 33.

[0030] The drive sheave 40 is rotatably provided on the wall portion 34 of the fixing structure 31. The drive sheave 40 is rotatably supported on the wall portion 34 via a drive shaft 41. The drive shaft 41 is rotatably attached to the wall portion 34, and the drive sheave 40 may be rotatable together with the drive shaft 41. The rotation center axis of the drive sheave 40 may be perpendicular to the wall portion 34 or parallel to the base portion 33. The drive sheave 40 is disposed above the base portion 33 of the fixing structure 31.

[0031] The drive sheave 40 includes a drive sheave groove (not shown) into which the speed governor rope 12 is inserted. The cross section of the drive sheave groove may be formed in a U shape similar to the above-described sheave groove 19. However, the cross section of the drive sheave groove may be formed in a V shape.

[0032] As shown in FIGS. 3 and 4, the rotation prevention mechanism 50 is configured to prevent the drive sheave 40 from rotating in the direction Q opposite to the direction P in which the speed governor rope 12 is pulled up. The direction P in which the drive sheave 40 pulls up the speed governor rope 12 is opposite to the clockwise direction shown in FIGS. 3 and 4. The rotation prevention mechanism 50 prevents the drive sheave 40 from rotating in the direction Q.

[0033] As shown in FIGS. 3 and 4, the rotation prevention mechanism 50 includes a ratchet gear 51 and a pawl 52. The ratchet gear 51 is rotatable in synchronization with the drive sheave 40 and is configured to rotate integrally with the drive sheave 40. The ratchet gear 51 may be fixed to the drive sheave 40. The pawl 52 meshes with the ratchet gear 51 to restrict the rotation of the drive sheave 40 in the direction Q described above. As shown in FIG. 3, the pawl 52 can mesh with the ratchet gear 51 by being inserted into a recess 51b formed between the teeth 51a of the ratchet gear 51. Thereby, the rotation of the drive sheave 40 in the direction Q can be prevented. In the examples shown in FIGS. 3 and 4, the number of pawls 52 is two, but the number of pawls 52 may be three or more and is arbitrary.

[0034] The driven sheave 60 is rotatably provided on the wall portion 34 of the fixed structure 31. The driven sheave 60 is rotatably supported by a support member 73 (to be described later) via a driven shaft 61. The driven shaft 61 is rotatably attached to the support member 73, and the driven sheave 60 may be rotatable together with the driven shaft 61. The rotation center axis of the driven sheave 60 may be parallel to the rotation center axis of the drive sheave 40.

[0035] The driven sheave 60 is disposed on the same side as the drive sheave 40 with respect to the wall portion 34. The driven sheave 60 is disposed so as to sandwich the governor rope 12 between it and the drive sheave 40. The driven sheave 60 is movable between a sheave pressing position (see FIG. 3) and a sheave releasing position (see FIG. 4).

[0036] The driven sheave 60 includes a driven sheave groove (not shown) into which the governor rope 12 is inserted. The cross-section of the driven sheave groove may be formed in the same manner as the cross-section of the drive sheave groove described above.

[0037] As shown in FIGS. 3 and 4, the moving mechanism 70 is configured to move the driven sheave 60 between a sheave pressing position and a sheave releasing position. As shown in FIG. 3, when the driven sheave 60 is positioned at the sheave pressing position, the driven sheave 60 approaches the driving sheave 40. In this case, the governor rope 12 is clamped between the driving sheave 40 and the driven sheave 60 and receives a pressing force from the driving sheave 40 and the driven sheave 60. As shown in FIG. 4, when the driven sheave 60 is positioned at the sheave releasing position, the driven sheave 60 moves away from the driving sheave 40. In this case, the governor rope 12 is released from the pressing forces of the driving sheave 40 and the driven sheave 60.

[0038] As shown in FIGS. 3 and 4, the moving mechanism 70 includes a first block body 71, a pressing force applying member 72, a support member 73, and a releasing mechanism 80.

[0039] The first block body 71 is fixed to the wall portion 34 of the fixed structure 31. The first block body 71 is disposed on the same side as the driven sheave 60 with respect to the wall portion 34 and is disposed between the wall portion 34 and the driven sheave 60.

[0040] The pressing force applying member 72 is configured to press the driven sheave 60 toward the driving sheave 40. The pressing force applying member 72 may be configured by a coil spring. The pressing force applying member 72 may apply a pressing force to the driven sheave 60 by the elastic force of the coil spring. The pressing force applying member 72 may be disposed between the first block body 71 and a support member 73 described later. One end of the pressing force applying member 72 may be in contact with the first block body 71, and the other end may be in contact with the support member 73. When the pressing force applying member 72 is configured by a coil spring, as shown in FIG. 5, it may be guided by a pin 74 disposed between the first block body 71 and the support member 73. The pin 74 may be fixed to the support member 73 or the first block body 71.

[0041] As shown in FIGS. 3 and 4, the support member 73 is rotatably supported by the wall portion 34 of the fixed structure 31. The support member 73 is disposed on the same side of the wall portion 34 as the driven sheave 60 and is disposed between the wall portion 34 and the driven sheave 60. The support member 73 is disposed on the side of the drive sheave 40 rather than the first block body 71. The support member 73 rotatably supports the driven shaft 61 described above and rotatably supports the driven sheave 60.

[0042] The support member 73 is rotatable with respect to the wall portion 34 so that the driven sheave 60 can move between the sheave pressing position and the sheave releasing position. More specifically, the support member 73 is rotatably supported by the wall portion 34 via a support shaft 75. The support member 73 is formed in a rectangular parallelepiped shape with the vertical direction as the longitudinal direction, and the support shaft 75 is disposed at the lower portion of the support member 73. The support shaft 75 may be constituted by a bolt. In this case, the support shaft 75 is attached to the support member 73 and the wall portion 34 so that the support member 73 can rotate with respect to the wall portion 34. The driven shaft 61 described above is disposed at the upper portion of the support member 73. Thus, the driven shaft 61 and the driven sheave 60 can rotate about the support shaft 75, and the driven sheave 60 can move between the sheave pressing position and the sheave releasing position. In the present embodiment, when the driven sheave 60 is positioned at the sheave pressing position, the support member 73 is in an inclined posture, and when the driven sheave 60 is positioned at the sheave releasing position, the support member 73 is in a vertical posture. However, the posture of the support member 73 is arbitrary regardless of the position of the driven sheave 60.

[0043] The support member 73 is configured to receive the pressing force of the pressing force applying member 72 described above and also receive the releasing force of the releasing force applying member 82 described later. As shown in FIG. 5, one end portion of the pressing force applying member 72 described above is in contact with one side surface 73a of the support member 73. The pressing force applying member 72 may be disposed on the side of the driven shaft 61 described above. The second end portion 83b of a leaf spring 83 described later is in contact with the other side surface 73b disposed on the opposite side of the support member 73. The second end portion 83b of the leaf spring 83 may be disposed on the side of the driven shaft 61.

[0044] As shown in FIGS. 3 and 4, the release mechanism 80 is configured to move the driven sheave 60 in a direction away from the drive sheave 40 against the pressing force of the pressing force applying member 72 described above. The release mechanism 80 includes a second block body 81, a release force applying member 82, and a leaf spring 83.

[0045] The second block body 81 is fixed to the wall portion 34 of the fixed structure body 31. The second block body 81 is disposed on the same side as the first block body 71 and the support member 73 with respect to the wall portion 34, and is disposed between the wall portion 34 and the driven sheave 60. The second block body 81 is disposed on the side of the drive sheave 40 with respect to the support member 73.

[0046] The release force applying member 82 is rotatably provided on the wall portion 34 of the fixed structure body 31. The release force applying member 82 may be disposed between the second block body 81 and the support member 73 described above. The release force applying member 82 is disposed on the same side as the second block body 81 and the support member 73 with respect to the wall portion 34.

[0047] As shown in FIG. 5, the release force applying member 82 may include a lever rotation shaft 82a and a pair of blade portions 82b extending from the lever rotation shaft 82a in opposite directions. The lever rotation shaft 82a is rotatably attached to the wall portion 34, and may be rotatable together with the pair of blade portions 82b. The rotation central axis of the release force applying member 82 may be perpendicular to the wall portion 34.

[0048] As shown in FIGS. 3 and 4, the release force applying member 82 is rotatable between a lever pressing position corresponding to the sheave pressing position of the driven sheave 60 (see FIG. 3) and a lever releasing position corresponding to the sheave releasing position of the driven sheave 60 (see FIG. 4). The release force applying member 82 is positioned at the lever releasing position against the elastic force of the leaf spring 83. When the release force applying member 82 is positioned at the lever pressing position, the driven sheave 60 is positioned at the sheave pressing position. When the release force applying member 82 is positioned at the lever releasing position, the driven sheave 60 is positioned at the sheave releasing position. The release force applying member 82 rotates from the lever pressing position to the lever releasing position by rotating in the direction opposite to the clockwise direction shown in FIGS. 3 to 5. The release force applying member 82 may be locked by a locking mechanism (not shown) when it is positioned at the lever releasing position. Thereby, it is possible to prevent the release force applying member 82 from rotating from the lever releasing position. For example, the locking mechanism may be constituted by a locking fixing pin (not shown) capable of preventing the release force applying member 82 from rotating reversely. The locking fixing pin may be unlockable with a button or the like. Alternatively, the locking mechanism may be constituted by a ratchet mechanism (not shown).

[0049] The leaf spring 83 is disposed between the second block body 81 and the support member 73. The leaf spring 83 may be bent. More specifically, as shown in FIG. 5, the leaf spring 83 includes a first end portion 83a that abuts against the second block body 81, a second end portion 83b that abuts against the support member 73, and a folded-back portion 83c. The above-described release force applying member 82 is disposed between the first end portion 83a and the second end portion 83b. The folded-back portion 83c of the leaf spring 83 is between the first end portion 83a and the second end portion 83b and is disposed below the first end portion 83a and the second end portion 83b. The folded-back portion 83c is attached to a spring fixing portion 84 fixed to the wall portion 34. The spring fixing portion 84 may be constituted by, for example, a leaf spring fixing pin or a leaf spring fixing bolt.

[0050] As shown in Fig. 3, when the release force applying member 82 is positioned at the lever pressing position, the pair of blade portions 82b of the release force applying member 82 are arranged along the vertical direction or a direction close to the vertical direction. Due to this, the leaf spring 83 is folded by the elastic force of the leaf spring 83, and the second end portion 83b of the leaf spring 83 abuts against the release force applying member 82. The support member 73 rotates to a position where it abuts against the second end portion 83b by the pressing force of the pressing force applying member 72. For this reason, the driven sheave 60 approaches the drive sheave 40, and the driven sheave 60 is positioned at the sheave pressing position.

[0051] On the other hand, as shown in Figs. 4 and 5, when the release force applying member 82 is positioned at the lever release position, against the elastic force of the leaf spring 83, the pair of blade portions 82b of the release force applying member 82 apply a pressing force to the support member 73. In this case, one blade portion 82b of the release force applying member 82 abuts against the first end portion 83a of the leaf spring 83, and the other blade portion 82b abuts against the second end portion 83b of the leaf spring 83. The leaf spring 83 elastically deforms and opens in a V shape. Due to this, a force is applied to the support member 73 from the release force applying member 82. For this reason, the driven sheave 60 moves in a direction away from the drive sheave 40 together with the support member 73, and the driven sheave 60 is positioned at the sheave release position.

[0052] The governor rope hoisting device 30 according to this embodiment may further include a drive operation lever 90 and a release operation lever 91. The drive operation lever 90 is an operation lever for rotationally driving the drive sheave 40. The drive operation lever 90 is configured to be connectable to the drive shaft 41 described above. By operating the drive operation lever 90 in the direction D1 of the arrow shown in FIG. 3, the drive sheave 40 can be rotationally driven to hoist the governor rope 12. The release operation lever 91 is an operation lever for rotationally driving the release force applying member 82. The release operation lever 91 is configured to be connectable to the lever rotation shaft 82a of the release force applying member 82 described above. By operating the release operation lever 91 in the direction D2 of the arrow shown in FIG. 3, the release force applying member 82 can be rotationally driven to be positioned at the lever pressing position. By operating the release operation lever 91 in the direction D3 of the arrow shown in FIG. 4, the release force applying member 82 can be rotationally driven to be positioned at the lever release position.

[0053] The governor rope hoisting device 30 according to this embodiment may be attached to the second pedestal member 17b of the mounting pedestal 17 described above during the inspection of the governor 10, and may be removed from the second pedestal member 17b after the inspection. However, even during the normal operation of the elevator, the governor rope hoisting device 30 may be attached to the second pedestal member 17b. In this case, the driven sheave 60 may be positioned at the sheave release position.

[0054] Next, a method for hoisting the governor rope 12 during the inspection of the governor 10 using the governor rope hoisting device 30 according to this embodiment having such a configuration will be described. Here, a case where the governor rope hoisting device 30 is not attached to the mounting pedestal 17 during the normal operation of the elevator will be described as an example.

[0055] First, as shown in FIG. 2, the governor rope hoisting device 30 is attached to the second pedestal member 17b of the mounting pedestal 17 of the governor 10. More specifically, the fixed structure 31 is attached to the second pedestal member 17b using bolts B. In this case, the governor rope hoisting device 30 is arranged such that the governor rope 12 is sandwiched between the driving sheave 40 and the driven sheave 60.

[0056] Subsequently, the release operation lever 91 is connected to the lever rotation shaft 82a of the release force applying member 82, and the release operation lever 91 is operated by an operator. The release operation lever 91 is operated in the direction D2 of the arrow shown in FIG. 3. As a result, the release force applying member 82 is positioned at the lever pressing position. The release force applying member 82 is maintained at the lever pressing position by the elastic force of the leaf spring 83.

[0057] The support member 73 is released from the release force of the release force applying member 82 and rotates under the pressing force of the pressing force applying member 72. The driven sheave 60 is positioned at the sheave pressing position. As a result, the governor rope 12 is sandwiched between the driving sheave 40 and the driven sheave 60 and receives a pressing force from the driving sheave 40 and the driven sheave 60.

[0058] Next, the drive operation lever 90 is connected to the drive shaft 41 of the drive sheave 40, and the drive operation lever 90 is operated by an operator. The drive operation lever 90 is operated in the direction D1 of the arrow shown in FIG. 3. As a result, the governor rope 12 pressed by the drive sheave 40 and the driven sheave 60 is pulled up as the drive operation lever 90 rotates. The governor rope 12 is pulled up until it floats from the governor sheave 13 of the governor 10 and the governor sheave 13 can rotate freely. Since the rotation prevention mechanism 50 prevents the drive sheave 40 from rotating in the direction Q shown in FIG. 3, the governor rope 12 can be held in the pulled-up state. Therefore, the governor rope 12 can be prevented from descending.

[0059] Thereafter, the operation of the governor 10 is confirmed.

[0060] After the operation check of the speed governor 10 is completed, first, the speed governor rope 12 is arranged above the sheave groove 19 of the speed governor sheave 13.

[0061] Subsequently, the release operation lever 91 is operated by the operator. The release operation lever 91 is operated in the direction D3 of the arrow shown in FIG. 4. As a result, the release force applying member 82 rotates from the lever pressing position to the lever release position against the elastic force of the leaf spring 83. The leaf spring 83 elastically deforms and opens in a V shape, and the release force applied by the release force applying member 82 is applied to the support member 73.

[0062] The support member 73 rotates against the pressing force of the pressing force applying member 72, and the driven sheave 60 is positioned at the sheave release position. The speed governor rope 12 moves away from the drive sheave 40, and the driven sheave 60 moves away from the speed governor rope 12. As a result, the speed governor rope 12 is released from the pressing forces of the drive sheave 40 and the driven sheave 60 and descends, and is inserted into the sheave groove 19 of the speed governor sheave 13 (see FIG. 2).

[0063] Thereafter, the speed governor rope hoisting device 30 is removed from the second pedestal member 17b of the speed governor 10. In this way, the inspection work of the speed governor 10 is completed, and the normal operation of the elevator becomes possible.

[0064] According to this embodiment, the driven sheave 60 is moved to the sheave pressing position by the moving mechanism 70, and the speed regulating rope 12 receives pressing forces from the driving sheave 40 and the driven sheave 60. By rotating in the direction P of pulling up the speed regulating rope 12, the driving sheave 40 can pull up the speed regulating rope 12. Since the driving sheave 40 is prevented from rotating in the direction Q opposite to the direction of pulling up the speed regulating rope 12 by the rotation prevention mechanism 50, it can hold the speed regulating rope 12 in the pulled-up state. Therefore, the speed regulating rope 12 can be lifted from the speed regulating sheave 13 of the speed regulator 10. In this way, in this embodiment, it is possible to eliminate the need to use a hand vice or the like (not shown) for grasping and pulling up the speed regulating rope 12. As a result, damage to the speed regulating rope 12 can be prevented when the speed regulating rope 12 is pulled up and lifted from the speed regulating sheave 13.

[0065] Further, according to this embodiment, the rotation prevention mechanism 50 includes a ratchet gear 51 that can rotate in synchronization with the driving sheave 40, and a pawl 52 that meshes with the ratchet gear 51 to restrict the rotation of the driving sheave 40 in the direction Q opposite to the direction of pulling up the speed regulating rope 12. Thereby, the pawl 52 can prevent the ratchet gear 51 from rotating in the direction Q in which the speed regulating rope 12 descends. Therefore, it is possible to prevent the driving sheave 40 from rotating in the direction Q opposite to the direction of pulling up the speed regulating rope 12.

[0066] Also, according to this embodiment, the driving sheave 40 is rotationally driven by the driving operation lever 90. Thereby, the operator can easily rotationally drive the driving sheave 40 using the driving operation lever 90, and can easily pull up the speed regulating rope 12.

[0067] Further, according to the present embodiment, the moving mechanism 70 includes a pressing force applying member 72 that presses the driven sheave 60 toward the driving sheave 40, and a releasing mechanism 80 that moves the driven sheave 60 in a direction away from the driving sheave 40 against the pressing force of the pressing force applying member 72. Thus, the driven sheave 60 can be positioned at the sheave pressing position by the pressing force of the pressing force applying member 72, and the driven sheave 60 can be positioned at the sheave releasing position by the releasing mechanism 80. Therefore, the driven sheave 60 can be easily moved between the sheave pressing position and the sheave releasing position.

[0068] Further, according to the present embodiment, the releasing force applying member 82 of the releasing mechanism 80 is rotatable between a lever pressing position corresponding to the sheave pressing position of the driven sheave 60 and a lever releasing position corresponding to the sheave releasing position of the driven sheave 60. Thus, the driven sheave 60 can be positioned at the sheave pressing position or the sheave releasing position by the releasing force applying member 82.

[0069] Further, according to the present embodiment, the releasing force applying member 82 is rotationally driven by a release operation lever 91. Thus, an operator can easily rotationally drive the releasing force applying member 82 using the release operation lever 91, and can easily position the driven sheave 60 at the sheave pressing position or the sheave releasing position.

[0070] Further, according to the present embodiment, the support member 73 of the moving mechanism 70 is rotatably supported by the fixed structure 31 and rotatably supports the driven sheave 60. The support member 73 receives the pressing force of the pressing force applying member 72 and the releasing force of the releasing force applying member 82 positioned at the lever releasing position. Thus, the support member 73 can position the driven sheave 60 at the sheave pressing position by the pressing force of the pressing force applying member 72, and can position the driven sheave 60 at the sheave releasing position by the releasing force of the releasing force applying member 82 positioned at the lever releasing position. Therefore, the driven sheave 60 can be easily moved between the sheave pressing position and the sheave releasing position.

[0071] Further, according to the present embodiment, the fixed structure 31 is detachably attached to the mounting pedestal 17 of the speed governor 10. As a result, when inspecting the speed governor 10, the speed governor rope hoisting device 30 can be attached to the mounting pedestal 17, and after the inspection of the speed governor 10 is completed, the speed governor rope hoisting device 30 can be removed from the mounting pedestal 17.

[0072] According to the embodiment described above, it is possible to prevent damage to the speed governor rope 12 when the speed governor rope 12 is hoisted and lifted off the speed governor sheave 13.

[0073] Although some embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0074] 10: Speed governor, 12: Speed governor rope, 13: Speed governor sheave, 17: Mounting pedestal, 30: Speed governor rope hoisting device, 31: Fixed structure, 40: Driving sheave, 50: Anti-rotation mechanism, 51: Ratchet gear, 52: Claw, 60: Driven sheave, 70: Moving mechanism, 72: Pressing force applying member, 73: Support member, 80: Release mechanism, 82: Release force applying member, 90: Driving operation lever, 91: Release operation lever

Claims

1. An elevator governor rope lifting device for lifting a governor rope and floating it from a governor sheave, comprising: a fixed structure; a drive sheave rotatably provided on the fixed structure; a rotation prevention mechanism for preventing the drive sheave from rotating in a direction opposite to the direction in which the governor rope is lifted; a driven sheave rotatably provided on the fixed structure, the driven sheave being arranged so as to sandwich the governor rope between the drive sheave and the driven sheave; a moving mechanism for moving the driven sheave between a sheave pressing position where the governor rope receives a pressing force from the drive sheave and the driven sheave, and a sheave releasing position where the governor rope is released from the pressing force of the drive sheave and the driven sheave; An elevator governor rope lifting device comprising the above.

2. The rotation prevention mechanism includes a ratchet gear that can rotate in synchronization with the drive sheave, and a claw that meshes with the ratchet gear to restrict the rotation of the drive sheave in a direction opposite to the direction in which the governor rope is lifted. The elevator governor rope lifting device according to Claim 1.

3. A drive operation lever for rotationally driving the drive sheave, The elevator governor rope lifting device according to Claim 1 or 2, further comprising the above.

4. The moving mechanism includes a pressing force applying member that presses the driven sheave toward the drive sheave, and a releasing mechanism that moves the driven sheave in a direction away from the drive sheave against the pressing force of the pressing force applying member. The elevator governor rope lifting device according to Claim 1 or 2.

5. The releasing mechanism further includes a release force applying member rotatably provided on the fixed structure, The release force applying member is rotatable between a lever pressing position corresponding to the sheave pressing position of the driven sheave and a lever release position corresponding to the sheave release position of the driven sheave. The elevator governor rope lifting device according to Claim 4.

6. A release operation lever for rotationally driving the release force applying member, The elevator governor rope lifting device according to Claim 5, further comprising the above.

7. The moving mechanism further includes a support member that is rotatably supported by the fixed structure and rotatably supports the driven sheave. The support member receives the pressing force of the pressing force applying member and also receives the force of the releasing force applying member positioned at the lever release position. The governor rope hoisting device for an elevator according to claim 5.

8. The fixed structure is detachably attached to the mounting pedestal of the governor. The governor rope hoisting device for an elevator according to claim 1 or 2.

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