Hoisting machine sheave rotation jig

Abstract

To provide a hoist machine sheave rotation jig capable of reducing the force required for manual winding operation and safely carrying out manual winding operation.SOLUTION: A rotation jig 1 comprises a large gear 10 that rotates synchronously with a sheave of an elevator hoist and has a screw hole 13 attached to the sheave, and a small gear 15 that rotates in conjunction with the large gear 10 at a constant rotation ratio relative to the rotation speed of the large gear 10 and that rotates faster than the large gear 10. The small gear 15 has a handle 60 for rotating the small gear 15. It is preferable that the rotating jig 1 be equipped with a ratchet mechanism 50 that limits the rotation of the small gear 15 to one side in the circumferential direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a hoist sheave rotation jig. [Background technology]

[0002] A conventional elevator is described in Patent Document 1. This elevator is designed so that when the power supply is cut off due to a power outage or malfunction, the rotating shaft of the motor (electric motor) connected to the rotating shaft of the sheave (pulley) of the hoisting machine can be exposed to the outside. A handwheel attached to the rotating shaft in a removable manner can be turned manually to raise the car, stop the car at the nearest floor, and rescue people inside the car. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-335026 Summary of the Invention [Problem to be solved by the invention]

[0004] In the elevator of Patent Document 1, a large force is required to manually pull up the car. Therefore, an object of the present disclosure is to provide a traction machine sheave rotation jig that can reduce the force required for manual operation and enable safe manual operation. [Means for solving the problem]

[0005] In order to solve the above problem, the hoist sheave rotation jig of the present disclosure comprises a first rotating member that rotates synchronously with the sheave of the elevator hoist and has an attachment portion that can be detachably attached to the sheave directly or indirectly via a connecting member, and a second rotating member that rotates in conjunction with the first rotating member at a constant rotation ratio to the rotation speed of the first rotating member and has a rotation speed faster than that of the first rotating member, and the second rotating member has a handle for rotating the second rotating member.

[0006] In the present disclosure, by using the handle to rotate the second rotating member, the first rotating member that is linked to the second rotating member is rotated, which in turn rotates the sheave to which the first rotating member is attached.

[0007] According to the present disclosure, the distance between the force point and the action point can be increased compared to when a handle is provided on the first rotating member. Therefore, the force required to rotate the first rotating member, which rotates the sheave, can be reduced. Furthermore, by appropriately adjusting the rotation ratio between the first rotating member and the second rotating member, the rotation speed at which a person rotates the second rotating member can be adjusted to a rotation speed at which the person can easily rotate the second rotating member. As a result, the car can be safely and easily raised to the nearest floor. Therefore, the force required for manual operation can be reduced, allowing manual operation to be performed safely.

[0008] In particular, when the sheave is that of a PM gearless hoist that is a large hoist that uses a permanent magnet (PM) motor instead of an induction motor and does not have a reducer, manual winding requires a large force, which increases the effort required for manual winding and makes the work dangerous. Therefore, when the sheave is that of a PM gearless hoist, the safety of manual winding can be significantly improved.

[0009] Furthermore, since the first rotating member has an attachment portion that can be detachably attached to the sheave directly or indirectly via a connecting member, and the hoisting machine sheave rotating jig is not permanently attached to the sheave, the operating costs during normal elevator operation can be reduced.

[0010] The first rotating member may be a large gear, and the second rotating member may be a small gear that meshes with the large gear and has fewer teeth than the large gear.

[0011] According to this configuration, the force required for manual winding can be reduced, allowing manual winding to be performed safely. Furthermore, the rotational power applied to the second rotating member can be reliably transmitted to the first rotational power, and ultimately to the sheave. Furthermore, a compact hoist sheave rotation jig can be realized.

[0012] The second rotating member may also be provided with a ratchet mechanism that allows the second rotating member to rotate only in one direction in the circumferential direction.

[0013] In this configuration, the hoist sheave rotation jig is attached to the sheave so that one circumferential side coincides with the direction in which the elevator car rises. The fact that the second rotating member can only rotate in one circumferential direction (one circumferential side) also means that the first rotating member can only rotate in the other circumferential direction (one circumferential side). This configuration prevents the car from descending, allowing people inside the car to be safely rescued.

[0014] Also, a brake may be provided to prevent the second rotating member from rotating.

[0015] In this specification, "hindering the rotation of a rotating member" means operating to suppress the rotation of the rotating member. "Hindering the rotation of a rotating member" means operating to reduce the rotation speed of the rotating member when the rotating member is rotating, and operating to suppress or prevent the rotation of the rotating member when the rotating member is stationary.

[0016] This configuration can suppress or prevent the car from descending, thereby ensuring the safety of people inside the car.

[0017] The brake may also have a footplate, and when the footplate is pressed down by a stepping force, the brake is released and the second rotating member becomes rotatable, while when the footplate is not pressed down, the brake may prevent the second rotating member from rotating.

[0018] In this configuration, the car is raised to a predetermined position by turning the handle while stepping on the footboard. In this way, when the car is not being raised, the brake can prevent the rotation of the second rotating member, suppressing or preventing the car from descending, ensuring the safety of people inside the car.

[0019] The vehicle may also include a battery that supplies power when a power outage occurs, and an operating unit that operates the brake using power from the battery.

[0020] According to this configuration, safety during manual winding operation can be improved by using an existing emergency battery.

[0021] The elevator may also include a regenerative power generating device that generates electricity when the position of the elevator car drops based on the weight of the car, and the brake may be operated using the electricity generated by the regenerative power generating device.

[0022] According to this configuration, the brake can be operated to suppress or prevent the car from falling using the power generated due to the car's descent. Therefore, two mechanisms, namely a car speed reduction mechanism based on regenerative power generation and a car speed reduction mechanism based on brake operation, can doubly suppress the car from falling, improving the safety of people inside the car. [Effects of the Invention]

[0023] According to the hoist sheave rotation jig of the present disclosure, the force required for manual winding operation can be reduced, allowing manual winding operation to be performed safely. [Brief explanation of the drawings]

[0024] [Figure 1]FIG. 2 is a front view of the hoist sheave rotation jig of the first embodiment of the present disclosure when viewed from the front. [Figure 2] 2 is a side view of the hoisting machine sheave rotating jig as seen from the direction of arrow A in FIG. 1. [Figure 3A] FIG. 10 is a schematic enlarged plan view for explaining the structure and operation of the ratchet mechanism, and is a schematic enlarged plan view of the ratchet mechanism as viewed from the connecting member side. [Figure 3B] FIG. 10 is a schematic enlarged plan view for explaining the structure and operation of the ratchet mechanism, and is a schematic enlarged plan view of the ratchet mechanism as viewed from the connecting member side. [Figure 4] FIG. 2 is a cross-sectional view illustrating the brake structure of the sheave of the hoisting machine. [Figure 5] FIG. 10 is a diagram illustrating a brake actuation mechanism using an emergency battery. [Figure 6] FIG. 10 is a diagram illustrating a brake actuation mechanism of a hoisting machine sheave rotation jig equipped with a dedicated battery. [Figure 7] FIG. 1 is a diagram illustrating a brake actuation mechanism that uses regenerative power. DETAILED DESCRIPTION OF THE INVENTION

[0025] Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It is anticipated that, when multiple embodiments and variations are included below, new embodiments can be constructed by appropriately combining their features. In the following examples, the same components are denoted by the same reference numerals in the drawings, and redundant description will be omitted. The drawings include schematic diagrams, and the dimensional ratios of the length, width, height, etc., of each component do not necessarily match between different drawings. In the following description, "preventing the rotation of a rotating member" means operating to suppress the rotation of the rotating member. "Preventing the rotation of a rotating member" means operating to reduce the rotational speed of the rotating member when the rotating member is rotating, and operating to suppress or prevent the rotation of the rotating member when the rotating member is stationary. Among the components described below, components not recited in the independent claims representing the highest concept are optional and not essential. The present disclosure is not limited to the following embodiments and variations thereof, and various improvements and modifications are possible within the scope of the claims and their equivalents.

[0026] (First embodiment) Fig. 1 is a front view of a hoist sheave rotation jig 1 according to a first embodiment of the present disclosure, and Fig. 2 is a side view of the hoist sheave rotation jig 1 as viewed from the direction of arrow A in Fig. 1. As shown in Fig. 1, the hoist sheave rotation jig (hereinafter simply referred to as the rotation jig) 1 includes a large gear 10, a small gear 15 that meshes with the large gear 10 and has fewer teeth than the large gear 10, a first rolling bearing 20, a second rolling bearing 25, a connecting member 30, and a ratchet mechanism 50 (see Fig. 3). The large gear 10 is an example of a first rotating member, and the small gear 15 is an example of a second rotating member.

[0027] The large gear 10, the small gears 15, and the connecting member 30 are made of a metal material, such as steel. The outer diameter of the large gear 10 is larger than the outer diameter of the small gears 15. The large gear 10 has a cylindrical through-hole 11 in its center, and the small gears 15 have a cylindrical through-hole 21 in their centers. The outer ring of the first rolling bearing 20 is fitted and fixed to the inner circumferential surface of the cylindrical through-hole 11, and the outer ring of the second rolling bearing 25 is fitted and fixed to the inner circumferential surface of the cylindrical through-hole 21.

[0028] The connecting member 30 is a one-piece member made of a metal material, such as steel. As shown in FIG. 2 , the connecting member 30 has a roughly U-shape when viewed from the side, and includes a first cylindrical portion 31, a second cylindrical portion 32, and a connecting portion 33. The first cylindrical portion 31 extends in a direction substantially perpendicular to the large gear 10, and the second cylindrical portion 32 also extends in the perpendicular direction. A first end 31 a of the first cylindrical portion 31 is fitted and fixed within the cylindrical inner circumferential surface of the inner ring of the first rolling bearing 20, and a first end 32 a of the second cylindrical portion 32 is fitted and fixed within the cylindrical inner circumferential surface of the inner ring of the second rolling bearing 25.

[0029] The connecting portion 33 has a first bent portion 33a, a second bent portion 33b, and a cylindrical shaft portion 33c that extends on a straight line substantially parallel to the large gear 10. The first bent portion 33a and the second bent portion 33b are each bent at approximately 90°. The first bent portion 33a connects the second end of the first cylindrical portion 31 to the first end of the cylindrical shaft portion 33c, and the second bent portion 33b connects the second end of the second cylindrical portion 32 to the second end of the cylindrical shaft portion 33c.

[0030] The first rolling bearing 20 rotatably supports the large gear 10 relative to a first end of the first cylindrical portion 31, and the second rolling bearing 25 rotatably supports the small gear 15 relative to a first end of the second cylindrical portion 32. The connecting member 30 maintains the large gear 10 and the small gear 15 in mesh with each other. The cylindrical shaft portion 33c of the connecting member 30 can be used as a grip when a person carries the rotating jig 1. It is preferable that the shaft portion be cylindrical because this makes it easier for people to carry the rotating jig 1, but the shaft portion does not have to be cylindrical.

[0031] In this embodiment, the ratchet mechanism 50 is provided on the small gear 15, but the ratchet mechanism 50 may also be provided on the large gear 10. FIGS. 3A and 3B are enlarged schematic plan views illustrating the structure and operation of the ratchet mechanism 50, as viewed from the connecting member side. As shown in FIG. 3A, the ratchet mechanism 50 includes a ratchet gear 51, a locking pawl fixing plate 52, a pawl mounting shaft 53, a spring fixing portion 54, a locking pawl 55, and a spring member 56. In FIGS. 3A and 3B, the pawl mounting shaft 53, the spring fixing portion 54, the locking pawl 55, and the spring member 56 are hidden from view by the presence of the locking pawl fixing plate 52 and must be represented by dotted lines; however, they are shown by solid lines to make their shapes easier to understand.

[0032] As shown in Figure 2, the ratchet gear 51 is integral with the small gear 15 on the cylindrical shaft portion 33c side of the small gear 15, and rotates synchronously with the small gear 15. The central axis of the ratchet gear 51 coincides with the central axis of the small gear 15. The locking pawl fixing plate 52 has a flat plate shape and is integral with the second cylindrical portion 32. The locking pawl fixing plate 52 is positioned at a distance from the ratchet gear 51 and extends approximately parallel to the ratchet gear 51. The locking pawl fixing plate 52 faces the ratchet gear 51 in its thickness direction.

[0033] The pawl mounting shaft 53 has a cylindrical shape and is formed integrally with the locking pawl fixing plate 52. The pawl mounting shaft 53 protrudes in the thickness direction from the surface of the locking pawl fixing plate 52 facing the ratchet gear 51. The spring fixing portion 54 has a flat plate shape and is formed integrally with the locking pawl fixing plate 52. The spring fixing portion 54 protrudes in the thickness direction from the surface of the locking pawl fixing plate 52 facing the ratchet gear 51.

[0034] The tip end of the pawl mounting shaft 53 is inserted into the through-hole of the locking pawl 55. The locking pawl 55 is capable of swinging relative to the pawl mounting shaft 53. The spring member 56 is formed of a coil spring or the like. One end of the spring member 56 is fixed to the spring fixing portion 54, and the other end of the spring member 56 is in contact with the tip end of the locking pawl 55. The spring member 56 constantly presses the locking pawl 55 toward the ratchet gear 51. The tip end of the locking pawl 55 is constantly in contact with the ratchet gear 51 due to the biasing force received from the spring member 56. Due to the provision of this ratchet mechanism 50, the small gear 15 is rotatable relative to the second cylindrical portion 32 of the connecting member 30 in one circumferential direction indicated by arrow B in FIG. 3A, but is unable to rotate relative to the second cylindrical portion 32 in the other circumferential direction indicated by arrow C in FIG. 3B.

[0035] As shown in Figure 2, the rotation jig 1 has a handle 60 used when rotating the small gear 15. The handle 60 is composed of, for example, two cylindrical rod-shaped portions 61a and 61b. The two rod-shaped portions 61a and 61b are formed integrally with the small gear 15 and protrude in the thickness direction of the small gear 15 from the front surface 59 of the small gear 15 on the ratchet gear 51 side. Each of the two rod-shaped portions 61a and 61b is positioned radially outward from the ratchet gear 51 with a gap between them.

[0036] To make it easier to grasp and manipulate the two rod-shaped portions 61a, 61b, it is preferable that the two rod-shaped portions 61a, 61b face each other across the center of the pinion 15 in a plan view when the front side surface 59 is viewed from outside the thickness direction of the pinion 15, as shown in Figure 1. In other words, it is preferable that the center of one rod-shaped portion 61a, the center of the other rod-shaped portion 61b, and the center 69 of the pinion 15 are located on approximately the same line in this plan view. Furthermore, to make it easier to grasp and manipulate the two rod-shaped portions 61a, 61b, it is preferable that the distance between one rod-shaped portion 61a and the center 69 of the pinion 15 approximately matches the distance between the other rod-shaped portion 61b and the center 69 of the pinion 15 in this plan view.

[0037] As shown in Figure 1, the large gear 10 has two or more screw holes 13 spaced apart, and a sheave 71 (see Figure 4) of a hoist 70 (see Figure 4) is provided with two or more screw holes 72 (see Figure 4). The large gear 10 can be arranged parallel to the sheave 71 so that the two or more screw holes 13 of the large gear 10 overlap the two or more screw holes 72 of the sheave 71 (sheave).

[0038] With two or more screw holes 13 of the large gear 10 overlapping two or more screw holes 72 of the sheave 71, the large gear 10 can be fixed to the sheave 71 by threading a screw (not shown), for example, the shank of a bolt, into the screw hole 13 of the large gear 10 and then into the screw hole 72 of the sheave 71, and ultimately the rotating jig 1 can be fixed to the sheave 71.

[0039] Large gear 10 is fixed at multiple points to sheave 71 at multiple points, preventing relative rotation of large gear 10 with respect to sheave 71, and therefore preventing relative rotation of rotating jig 1 with respect to sheave 71. Rotating jig 1 is fixed to the sheave so that when small gear 15 rotates in one of the circumferential directions in which it is rotatable, sheave 71, receiving torque from large gear 10, rotates in a direction that raises the elevator car.

[0040] In this way, by fixing the rotating jig 1 to the sheave 71, when the power supply is cut off due to a power outage or malfunction, a person can apply force to the handle 60 to rotate the small gear 15, thereby lifting the car from its stopping position to the nearest landing on the upper floor, and a person trapped inside the car can be rescued from the car.

[0041] As described above, the rotating jig 1 comprises a large gear (first rotating member) 10 that rotates synchronously with the sheave 71 of the elevator hoist 70 and has a screw hole (mounting portion) 13 that is attached to the sheave 71, and a small gear (second rotating member) 15 that rotates in conjunction with the large gear 10 at a constant rotation ratio relative to the number of rotations of the large gear 10 and has a faster rotational speed than the large gear 10. The small gear 15 also has a handle 60 for rotating the small gear 15.

[0042] In the present disclosure, rotating the small gear 15 using the handle 60 rotates the large gear 10 that is interlocked with the small gear 15, which in turn rotates the sheave 71 to which the large gear 10 is attached.

[0043] According to the present disclosure, the distance between the point of force and the point of action can be increased compared to when a handle is provided on the first rotating member. Therefore, the force required to rotate the large gear 10, which rotates the sheave 71, can be reduced. Furthermore, by appropriately adjusting the rotation ratio between the large gear 10 and the small gears 15, the rotational speed at which a person rotates the small gears 15 can be adjusted to a speed at which the person can easily rotate the small gears 15. As a result, the car can be safely and easily raised to the nearest floor. This reduces the force required for manual operation, allowing for safe manual operation.

[0044] In particular, when the sheave 71 is the sheave of a PM gearless hoist that is a large hoist that uses a permanent magnet (PM) motor instead of an induction motor and does not have a reducer, manual winding operation requires a large force, which increases the effort required for manual winding operation and makes it a dangerous job. Therefore, when the sheave 71 is the sheave of a PM gearless hoist, the safety of manual winding operation can be significantly improved.

[0045] Furthermore, the large gear 10 has a screw hole 13 that allows it to be detachably attached to the sheave 71, and the rotating jig 1 is not configured to be permanently attached to the sheave 71, so the operating costs during normal elevator operation can be reduced.

[0046] Alternatively, the first rotating member may be the large gear 10, and the second rotating member may be a small gear 15 that meshes with the large gear 10 and has fewer teeth than the large gear 10.

[0047] According to this configuration, the force required for manual winding can be reduced, allowing manual winding to be performed safely, and a compact rotating jig 1 can be realized.

[0048] Also, a ratchet mechanism 50 may be provided that allows the small gear 15 to rotate only in one direction in the circumferential direction.

[0049] In this configuration, the rotating jig 1 is attached to the sheave 71 so that the one circumferential side mentioned above coincides with the direction in which the elevator car ascends. Note that the fact that the small gear 15 can only rotate in one circumferential direction (one circumferential side) also coincides with the fact that the large gear 10 can only rotate in the other circumferential direction (one circumferential side).

[0050] According to this configuration, the car can be prevented from descending, so that people inside the car can be safely rescued.

[0051] In the above description, the large gear 10 constituting the first rotating member is directly and detachably attached to the sheave 71 using two or more screw holes 13 constituting the attachment portion. However, the first rotating member may be detachably attached to a connecting member attached to the sheave using the attachment portion, or may be indirectly and detachably attached to the sheave using the attachment portion via a connecting member.

[0052] In the above description, the first rotating member is the large gear 10, and the second rotating member is a small gear 15 that meshes with the large gear 10 and has fewer teeth than the large gear 10. However, the first rotating member of the rotating jig may be an annular plate member without teeth on its outer circumferential surface, and the second rotating member of the rotating jig may be an annular plate member without teeth on its outer circumferential surface and with a smaller diameter than the first rotating member. Also, a portion of the outer circumferential surface of the first rotating member may contact a portion of the outer circumferential surface of the second rotating member. The rotating jig may also include a belt that is looped (encircled) between the first and second rotating members. When the second rotating member rotates, the rotational power of the second rotating member is transmitted to the first rotating member via the belt, causing the first rotating member to rotate.

[0053] In addition, the rotating jig 1 has been described as including the ratchet mechanism 50 that allows the second rotating member to rotate only in one circumferential direction. However, the rotating jig does not necessarily have to include a ratchet mechanism that allows the second rotating member to rotate only in one circumferential direction.

[0054] Also, the small gears 15 are not held on a machine base in the above description, but the small gears may be rotatably held on a machine base (for example, a machine base H-beam) with clips.

[0055] (Second embodiment) The rotating jig 1 of the first embodiment was not equipped with a brake that prevents the rotation of the second rotating member. However, if the rotating jig were equipped with a brake that prevents the rotation of the second rotating member, it would be possible to suppress or prevent the basket from falling when the basket is manually raised using the rotating jig, thereby improving the safety of people inside the basket. In the second embodiment, a case will be described in which the rotating jig 101 is equipped with a brake operating mechanism 150 that prevents the rotation of the second rotating member (small gear 15) in addition to the rotating jig 1 described in the first embodiment.

[0056] It goes without saying that the brake operating mechanism 150 that prevents the rotation of the second rotating member (small gear 15) also prevents the rotation of the first rotating member (large gear 10). In the second embodiment, the same components as in the first embodiment are given the same reference numerals as in the first embodiment, and descriptions thereof will be omitted. In the second embodiment, descriptions of the same effects and modifications as in the first embodiment will be omitted.

[0057] FIG. 4 is a cross-sectional view illustrating the structure of a sheave 71 of an elevator hoist 70. The hoist 70 includes a sheave 71, a motor 75, and a brake 80. The motor 75 is configured, for example, as an induction motor or a permanent magnet (PM) motor. The central axis of the sheave 71 is positioned approximately collinearly with the central axis of a rotating shaft 75a of the motor 75. The sheave 71 rotates synchronously with the rotating shaft 75a. The rotating shaft 75a is rotatably supported by a case 77 via one or more rolling bearings 78. The sheave 71 may rotate at a rotation speed obtained by multiplying the rotation speed of the rotating shaft 75a of the motor 75 by a predetermined multiple (a constant other than 1), and the rotating shaft of the sheave 71 does not have to be positioned approximately collinearly with the rotating shaft 75a of the motor 75.

[0058] The sheave 71 has the above-mentioned two or more screw holes 72 and an annular flange 71a that protrudes radially outward. As will be described later, the brake 80 is an electric brake, and has a pair of separable brake discs 85 (see FIG. 5) on the flange 71a. The brake 80 prevents rotation of the flange 71a, i.e., rotation of the sheave 71, by pressing the pair of brake discs 85 against the flange 71a from both sides of the flange 71a so as to sandwich the flange 71a.

[0059] FIG. 5 is a diagram illustrating the configuration of the brake actuation mechanism 150 of the rotating jig 101. The brake actuation mechanism 150 includes a microswitch 111, a pedal 112, and a connector 115. The pedal 112 is an example of an operating unit. While this configuration is well known and will not be described in detail, the microswitch 111 includes an actuator 111a, a snap action mechanism, a contact unit, a case 111b, and a terminal unit. The snap action mechanism and the contact unit are covered by the case 111b. The microswitch 111 opens and closes the contact depending on whether or not an external force is applied to the actuator 111a, thereby switching the switch on and off.

[0060] In this embodiment, the actuator 111a is formed of a rod-shaped member, and the tip of the actuator 111a is in contact with a step support portion extending from the back surface of the step 112 to the rear side. The actuator 111a is configured to be depressed by stepping on the step 112. The microswitch 111 is configured so that the switch is on when the step 112 is not stepped on and the actuator 111a is not depressed, and is off when the step 112 is stepped on and the actuator 111a is depressed. The surface of the case 111b of the microswitch 111 where the terminal portion is not exposed may be fixed to the base 165. This stabilizes the posture of the microswitch 111, allowing the step 112 to be stepped on smoothly.

[0061] Connector 115 is electrically connected to microswitch 111. Connector 115 is fitted and fixed in a predetermined location on the elevator. If the hoisting machine is located in a machine room, the predetermined location is provided somewhere in the machine room, and if the hoisting machine is located in a pit, the predetermined location is provided somewhere around the pit.

[0062] The brake 80 has a pair of linear actuators 82. The linear actuator 82 has a case 83 and a cylinder 84 with an extendable protrusion protruding from the case 83. A brake disc 85 that extends in a direction substantially perpendicular to the extension direction of the cylinder 84 is provided at the tip of the cylinder 84.

[0063] The elevator is equipped with an emergency battery 130 that supplies power in the event of a power outage. When connector 115 is fitted and fixed in place, emergency battery 130 is electrically connected to each of a pair of linear actuators 82 of brake 80 via microswitch 111. When power is supplied to linear actuator 82, the protruding portion of cylinder 84 extends, causing brake disc 85 to press against flange 71a, preventing sheave 71 from rotating.

[0064] The rotation jig 101 of the second embodiment is used as follows. First, the connector 115 is fitted and fixed in a predetermined position. Then, the microswitch 111 is turned on when the footboard 112 is not being stepped on, so the moment the connector 115 is fitted and fixed in a predetermined position, a circuit is established in which power from the emergency battery 130 is supplied to the pair of linear actuators 82. As a result, the pair of brake discs 85 are pressed against the flange 71a from both sides to sandwich the flange 71a, preventing the sheave 71 from rotating.

[0065] Furthermore, the circuit through which power from the emergency battery 130 is supplied to the pair of linear actuators 82 cannot be established unless the connector 115 is fitted and fixed in a predetermined location, or even if the connector 115 is fitted and fixed in a predetermined location, it will not be established if the footboard 112 is stepped on and the actuator 111a is pushed down.

[0066] After attaching the above-mentioned rotating jig 1 to the sheave 71, the person steps on and pushes down the footboard 112 when raising the car. This turns off the switch, moves the brake disc 85 away from the flange 71a, and allows the sheave 71 to rotate. With the sheave 71 in a rotatable state, the person uses the handle 60 to rotate the small gear 15, raising the car to the landing. When the person is not rotating the small gear 15, they do not apply a stepping force to the footboard 112. By performing this action, the rotation of the sheave 71 can be prevented when the person is not stepping on the footboard 112, preventing the car from descending and significantly increasing the safety of the people inside the car.

[0067] As described above, a brake 80 may be provided to prevent the small gear 15 from rotating.

[0068] This configuration can suppress or prevent the car from descending, thereby ensuring the safety of people inside the car.

[0069] In addition, the brake 80 may have a step 112, and when the step 112 is pressed down by a stepping force, the brake 80 is released and the small gear 15 becomes rotatable, while when the step 112 is not pressed down, the brake 80 may prevent the rotation of the small gear 15.

[0070] In this configuration, the basket is raised to a predetermined position by turning the handle 60 while stepping on the footboard 112. In this way, when the basket is not being raised, the brake 80 can prevent the rotation of the small gear 15, suppressing or preventing the basket from descending, ensuring the safety of people inside the basket.

[0071] It may also be equipped with an emergency battery 130 that supplies power in the event of a power outage, a brake 80 that prevents the small gear 15 from rotating, and an operating unit (treadle 112) that operates the brake 80 using power from the emergency battery 130.

[0072] According to this configuration, the existing emergency battery 130 can be used to improve safety during manual winding operation.

[0073] In the second embodiment, the case where safety during manual operation is improved by using an existing emergency battery 130 has been described. However, the battery for the brake 80 does not have to be the emergency battery 130 installed in the elevator, but may be a battery dedicated to the rotating jig.

[0074] 6, that is, a diagram corresponding to FIG. 5 of the rotating jig 201 of the first modified example of the second embodiment, the brake actuation mechanism 250 of the rotating jig 201 may have a dedicated battery 230 having a first terminal electrically connected to a terminal of the microswitch 111 and a second terminal electrically connected to a terminal of the connector 115. Then, when the connector 115 is fitted and fixed in a predetermined position, a circuit is constructed in which power from the dedicated battery 230 is supplied to the pair of linear actuators 82.

[0075] Even in this case, the circuit through which power from the dedicated battery 230 is supplied to the pair of linear actuators 82 cannot be constructed unless the connector 115 is fitted and fixed in a predetermined location, or even if the connector 115 is fitted and fixed in a predetermined location, it will not be constructed when the footboard 112 is stepped on and the actuator 111a is pressed down.

[0076] Alternatively, the power source for the brake 80 may be regenerative power generated when the car descends. More specifically, as shown in Fig. 7, i.e., a diagram corresponding to Fig. 5 of the rotating jig 301 of the second modified example of the second embodiment, the brake actuation mechanism 350 of the rotating jig 301 may include a regenerative power generation device 370, which may include, for example, a three-phase AC motor 340 and an inverter 341. The three-phase AC motor 340 may be the same as the motor 75 for raising and lowering the car, or may be a motor different from the motor 75 for raising and lowering the car.

[0077] The three-phase AC motor 340 includes, for example, a rotor installed on the rotating shaft of the sheave 71, and a stator arranged radially opposite the rotor. The inverter 341 is electrically connected to the three-phase AC motor 34 and converts AC power generated by the three-phase AC motor 34 into DC power. In this configuration, when the connector 115 is fitted and fixed in a predetermined position, a circuit may be formed in which the inverter 341 is electrically connected to the pair of linear actuators 82.

[0078] According to this configuration, three-phase AC motor 340 generates AC power due to a mechanical force applied to it based on the descent of the car, and the AC power generated by three-phase AC motor 340 is converted to DC power by inverter 341 and then supplied to pair of linear actuators 82. Therefore, brake disc 85 presses flange 71a, preventing rotation of sheave 71 and preventing the descent of the car, thereby improving the safety of people inside the car.

[0079] In brief, the rotating jig 301 is equipped with a regenerative power generating device 370 that generates power when the elevator car's position drops based on the car's own weight, and the power generated by the regenerative power generating device 370 may be used to operate a brake 80 that prevents the small gear 15 from rotating.

[0080] According to this configuration, the brake 80 can be operated to suppress or prevent the car from falling using the electric power generated due to the car's descent. Therefore, two mechanisms, namely a car speed reduction mechanism based on regenerative electric power generation and a car speed reduction mechanism based on brake operation, can doubly suppress the car from falling, improving the safety of people inside the car.

[0081] Even in this case, the circuit through which power from the regenerative power generating device 370 is supplied to the pair of linear actuators 82 cannot be constructed unless the connector 115 is fitted and fixed in a predetermined location, or even if the connector 115 is fitted and fixed in a predetermined location, it will not be constructed when the footboard 112 is stepped on and the actuator 111a is pushed down.

[0082] The power generated by the regenerative power generation device 370 may be applied in a direction that stops the motor 75. Also, both the power of the emergency battery 130 and the power generated by the regenerative power generation device 370 may be configured to be used to prevent the rotation of the motor 75. Furthermore, in the second embodiment, the case where the brake 80 is released when the footboard 112 is stepped on has been described, but the brake 80 may also be configured to be activated when the footboard 112 is stepped on.

[0083] Furthermore, the hoist sheave rotation jig of the present disclosure may have the following configuration. Configuration 1: A hoist sheave rotation jig comprising: a first rotating member that rotates synchronously with the sheave of an elevator hoist and has an attachment portion that can be detachably attached to the sheave directly or indirectly via a connecting member; and a second rotating member that rotates in conjunction with the first rotating member at a constant rotation ratio relative to the rotation speed of the first rotating member and has a rotational speed faster than that of the first rotating member, wherein the second rotating member has a handle for rotating the second rotating member. Configuration 2: A hoist sheave rotation jig as described in Configuration 1, wherein the first rotating member is a large gear, and the second rotating member is a small gear that meshes with the large gear and has fewer teeth than the large gear. Configuration 3: The hoist sheave rotation jig according to configuration 1 or 2, which is provided with a ratchet mechanism that allows the second rotating member to rotate only in one direction in the circumferential direction. Configuration 4: The hoist sheave rotation jig according to any one of configurations 1 to 3, further comprising a brake that prevents the second rotating member from rotating. Configuration 5: A hoist sheave rotation jig as described in Configuration 4, wherein the brake has a footplate, and when the footplate is pressed down by a pedal force, the brake is released and the second rotating member becomes rotatable, whereas when the footplate is not pressed, the brake prevents the second rotating member from rotating. Configuration 6: The hoist sheave rotation jig according to Configuration 4 or 5, comprising a battery that supplies power when a power outage occurs, and an operating unit that operates the brake using power from the battery. Configuration 7: A hoist sheave rotation jig according to any one of configurations 4 to 6, further comprising a regenerative power generating device that generates electric power when the position of the elevator car is lowered based on the weight of the car, and the brake is operated using the electric power generated by the regenerative power generating device. [Explanation of symbols]

[0084] 1,101,201,301 Rotating jig, 10 Large gear, 11 Cylindrical through hole, 13 Screw hole, 15 Small gear, 20 First rolling bearing, 21 Cylindrical through hole, 25 Second rolling bearing, 30 Connecting member, 31 First cylindrical portion, 31a First end, 32 Second cylindrical portion, 32a First end, 33 Connecting portion, 33a First bent portion, 33b Second bent portion, 33c Cylindrical shaft portion, 34 Three-phase AC motor, 50 Ratchet mechanism, 51 Ratchet gear, 52 Locking pawl fixing plate, 53 Pawl mounting shaft portion, 54 Spring fixing portion, 55 Locking pawl, 56 Spring member, 59 Front surface, 60 Handle, 61a, 61b Rod-shaped portion, 69 Center, 70 Hoist, 71 Sheave, 71a Flange, 72 Screw hole, 75 Motor, 75a Motor rotating shaft, 77 Case, 78 Rolling bearing, 80 Brake, 82 Linear actuator, 83 Case, 84 Cylinder, 85 Brake disc, 111 Microswitch, 111a Microswitch actuator, 111b Case, 112 Step, 115 Connector, 130 Emergency battery, 150, 250, 350 Brake operating mechanism, 165 Base, 230 Dedicated battery, 340 Three-phase AC motor, 341 Inverter, 370 Regenerative power generating device.

Claims

1. a first rotating member that rotates synchronously with a sheave of an elevator hoisting machine and has an attachment portion that is detachably attached to the sheave directly or indirectly via a connecting member; a second rotating member that rotates in conjunction with the first rotating member at a constant rotation ratio with respect to the rotation speed of the first rotating member and that has a rotation speed faster than that of the first rotating member, The second rotating member has a handle for rotating the second rotating member.

2. the first rotating member is a large gear; 2. The hoist sheave rotation jig according to claim 1, wherein the second rotating member is a small gear that meshes with the large gear and has fewer teeth than the large gear.

3. 3. The hoist sheave rotation jig according to claim 1, further comprising a ratchet mechanism that allows the second rotating member to rotate only in one direction in the circumferential direction.

4. The hoist sheave rotation jig according to claim 1 or 2, further comprising a brake that prevents the second rotating member from rotating.

5. the brake has a footplate; 5. The hoist sheave rotation jig according to claim 4, wherein when the treadle is pressed down by a treading force, the brake is released and the second rotating member becomes rotatable, whereas when the treadle is not pressed, the brake prevents rotation of the second rotating member.

6. a battery that provides power in the event of a power outage; an operating unit that operates the brake using power from the battery; The hoist sheave rotation jig according to claim 4, comprising:

7. a regenerative power generating device that generates electric power when a position of the elevator car is lowered based on the weight of the car; The hoist sheave rotation jig according to claim 4, wherein the brake is operated by electric power generated by the regenerative electric power generating device.

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