Elevator speed governor and elevator

Abstract

To provide an elevator speed governor capable of preventing the configuration of a link mechanism from being restricted by the configuration of a governor vehicle.SOLUTION: An elevator speed governor comprises a rotary shaft, a governor vehicle having a governor rope wrapped around the outer periphery and rotating around the rotary shaft, a rotating body separated from the governor vehicle and rotating around the rotary shaft together with the governor vehicle, a link mechanism connected to the rotating body so as to rotate together with the rotating body, a weight connected to the link mechanism and moving radially outward from the rotary shaft in accordance with the rotation of the rotating body, and an elastic part that applies elastic restoring force radially inward to the weight.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present specification relates to an elevator governor and an elevator. [Background technology]

[0002] Conventionally, for example, an elevator governor includes a rotating shaft, a governor wheel with a governor rope wound around its outer circumference and rotating around the rotating shaft, a link mechanism connected to the governor wheel, a weight connected to the link mechanism that moves radially outward of the rotating shaft as the governor wheel rotates, and an elastic part that applies an elastic restoring force to the weight radially inward of the rotating shaft (for example, Patent Document 1).

[0003] In the elevator governor disclosed in Patent Document 1, the link mechanism is connected to the governor wheel, so the configuration of the link mechanism is restricted by the configuration of the governor wheel, which reduces the degree of freedom in designing the governor, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-1822 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present invention is to provide an elevator governor and an elevator that can prevent the configuration of the link mechanism from being restricted by the configuration of the governor wheel. [Means for solving the problem]

[0006] [1] The elevator governor is A rotation axis; a governor wheel having a governor rope wound around its outer periphery and rotating about the rotary shaft; a rotating body that is separate from the governor wheel and rotates together with the governor wheel about the rotation shaft; a link mechanism connected to the rotating body so as to rotate together with the rotating body; a weight connected to the link mechanism and moving radially outwardly of the rotation shaft as the rotating body rotates; The weight includes an elastic portion that applies an elastic restoring force to the weight inward in the radial direction.

[0007] [2] In addition, in the elevator governor described above in [1], the link mechanism includes a link rotatably connected to the rotating body at a connection portion, the connecting portion is disposed radially outward from an outer periphery of the governor wheel when viewed in the axial direction of the rotary shaft. The following configuration is also possible.

[0008] [3] In addition, in the elevator governor of [1] or [2] above, when the governor wheel and the rotating body are stopped, at least a portion of the weight is disposed radially outward from an outer periphery of the governor wheel as viewed in the axial direction of the rotating shaft. The following configuration is also possible.

[0009] [4] In addition, in any one of the elevator governors [1] to [3] above, the rotating body is fixed to at least one of the rotary shaft and the governor wheel, thereby being fixed to the governor wheel, and is in contact with the governor wheel in the axial direction of the rotary shaft; The following configuration is also possible.

[0010] [5] In addition, in any one of the elevator governors [1] to [3] above, The governor wheel is fixed to the rotary shaft, The rotor is fixed to the rotary shaft and is spaced apart from the governor wheel in the axial direction of the rotary shaft. The following configuration is also possible.

[0011] [6] In addition, the elevator The elevator is equipped with any one of the elevator governors [1] to [5] above. [Brief explanation of the drawings]

[0012] [Figure 1] Schematic diagram of an elevator according to an embodiment. [Figure 2] FIG. 1 is a rear view of the elevator governor according to the embodiment. [Figure 3] FIG. 1 is a side view of a main part of an elevator governor according to the embodiment; [Figure 4] FIG. 1 is a front view of a main part of an elevator governor according to the embodiment; [Figure 5] 1 is a front view of a main part of an elevator governor according to a reference example. [Figure 6] 10 is a side view of a main part of an elevator governor according to another embodiment. [Figure 7] FIG. 10 is a front view of a main part of an elevator governor according to still another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] In each drawing, the dimensions of the components may be enlarged or reduced relative to the actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. Note that in each drawing, for example, to facilitate understanding, some of the components may be omitted.

[0014] Terms including ordinal numbers such as "first" and "second" are used to describe various components, but these terms are used only to distinguish one component from another, and the components are not particularly limited by these terms. The number of components including ordinal numbers is not particularly limited, and may be, for example, one. Furthermore, the ordinal numbers used in the following specification and drawings may differ from the ordinal numbers described in the claims.

[0015] An embodiment of an elevator and an elevator speed governor will be described below with reference to Figures 1 to 5. Note that the following embodiment is provided as an example to facilitate understanding of the configuration of the elevator and elevator speed governor, and does not limit the configuration of the elevator and elevator speed governor.

[0016] As shown in Fig. 1, an elevator 1 may include, for example, a car 2 for people (passengers) to ride in, a car drive unit 3 for running the car 2, a car rail 4 for guiding the car 2, and a processing unit 5 for controlling each part of the elevator 1. The drive system of the car drive unit 3 is not particularly limited.

[0017] For example, as in this embodiment, the elevator 1 may be configured to include a car rope 6 having a first end connected to the car 2, a counterweight 7 connected to a second end of the car rope 6, and a counterweight rail 8 that guides the counterweight 7, and the car drive unit 3 may be configured to include a sheave 3a around which the car rope 6 is wound, a drive source 3b (e.g., a motor) that rotates the sheave 3a, and a braking unit 3c that brakes the sheave 3a. In other words, the car drive unit 3 may be a hoist, and the elevator 1 may be configured to use a rope-type drive system.

[0018] However, the configuration is not limited to this, and for example, the car drive unit 3 may be a hydraulic device and the elevator 1 may have a hydraulic drive system, or for example, the car drive unit 3 may be a linear motor and the elevator 1 may have a linear motor drive system.

[0019] Furthermore, in this embodiment, the first ends of the car ropes 6 are connected to the car 2, and the second ends of the car ropes 6 are connected to the counterweight 7, but the present invention is not limited to this configuration. For example, a configuration is also possible in which both ends of the car ropes 6 are fixed to the upper part or the lower part of the hoistway X1, and the car ropes 6 are wound around the sheaves of the car 2 and the counterweight 7, respectively, thereby connecting the car ropes 6 to the car 2 and the counterweight 7, respectively.

[0020] Furthermore, the elevator 1 according to this embodiment is configured such that the hoisting machine, which is the car drive unit 3, is disposed inside the machine room X2, but is not limited to such a configuration. For example, the elevator 1 may be configured such that the machine room X2 is not provided and the hoisting machine is disposed inside the hoistway X1.

[0021] In each figure, the first direction D1 is the first horizontal direction D1, the second direction D2 is the second horizontal direction D2 which is a horizontal direction perpendicular to the first horizontal direction D1, and the third direction D3 is the up-down direction D3 which is perpendicular to each of the horizontal directions D1 and D2, and is the lifting direction in which the car 2 and the counterweight 7 rise and fall.

[0022] The elevator 1 may be equipped with, for example, a speed governor 10 that detects the traveling speed of the car 2, as in this embodiment. The car 2 may also be equipped with, for example, a car chamber 2a for passengers to ride in, a car frame 2b that is arranged around the car chamber 2a and fixed to the car chamber 2a, and a car stopping device 2c that stops the car 2 on the car rail 4, as in this embodiment.

[0023] As shown in Figures 1 and 2, the speed governor device 10 may include, for example, an endless looped governor rope 11 connected to the car 2 so as to run in conjunction with the movement of the car 2, an elevator speed governor (hereinafter simply referred to as "speed governor") 20 around which the governor rope 11 is wound, a tension wheel 12 suspended from the governor rope 11 to apply tension to the governor rope 11, and a rope stop unit 13 that stops the running of the governor rope 11 when the car 2 moves at a set speed.

[0024] The governor 20 includes a rotating shaft 21 and a governor wheel 22 around the outer periphery of which the governor rope 11 is wound and which rotates around the rotating shaft 21. Although not particularly limited, in this embodiment, the rotating shaft 21 extends in the first lateral direction D1, and the governor wheel 22 rotates around the first lateral direction D1 as its axis.

[0025] The configuration of the rope stop unit 13 is not particularly limited. For example, the rope stop unit 13 may be configured to grip the governor rope 11 when the car 2 moves at a set speed and the governor wheel 22 rotates at a set rotational speed, thereby stopping the running of the governor rope 11. The set speed may be higher than the rated speed of the car 2 (maximum speed during normal operation), and may be, for example, 110% to 120% of the rated speed of the car 2.

[0026] Although not shown, the car stopping device 2c may include, for example, a mover that is movable relative to the car frame 2b. Specifically, the mover may be movable relative to the car frame 2b between, for example, a stop position where the car 2 is stopped on the car rail 4 and a standby position below the stop position.

[0027] Although not particularly limited, for example, when the traveling speed of the car 2 reaches a set speed, the rope stop part 13 grips the governor rope 11, causing the traveling of the governor rope 11 to stop and the car 2 to move downward, thereby activating the car stopping device 2c, i.e., the mover moves from the standby position to the stop position. And, for example, when the mover is located at the stop position, the car stopping device 2c (for example, the mover) may be configured to pressurize and come into contact with the car rail 4, causing the car 2 to stop on the car rail 4.

[0028] 2 to 4, governor 20 includes rotor 23 that rotates around rotor shaft 21 together with governor wheel 22, link mechanism 30 connected to rotor 23 so as to rotate together with rotor 23, weights 24 and 25 that are connected to link mechanism 30 and move radially outward of rotor shaft 21 as rotor 23 rotates, and elastic portion 26 that applies an elastic restoring force to weights 24 and 25 inward in the radial direction of rotor shaft 21. Governor 20 may also include, for example, a bearing portion 27 that supports rotor shaft 21.

[0029] In the following, unless otherwise specified, the term "radial direction" refers to the radial direction of the rotating shaft 21. In the following, unless otherwise specified, the term "axial direction" refers to the axial direction D1 of the rotating shaft 21.

[0030] The rotating body 23 is separate from the governor wheel 22. The rotating body 23 is fixed to the governor wheel 22. This allows the rotating body 23 to rotate together with the governor wheel 22. Furthermore, because the rotating body 23 is in contact with the governor wheel 22 in the axial direction D1, the dimensions of the rotating body 23 and the governor wheel 22 in the axial direction D1 can be reduced.

[0031] Furthermore, the configuration for fixing the rotating body 23 to the governor wheel 22 is not particularly limited. For example, the rotating body 23 and the governor wheel 22 may be fixed to the rotating shaft 21 by fixing means, so that the rotating body 23 and the governor wheel 22 rotate integrally with the rotating shaft 21.

[0032] Also, for example, a configuration may be adopted in which the rotating body 23 is fixed to the governor wheel 22 by a fixing means, and at least one of the rotating body 23 and the governor wheel 22 is fixed to the rotating shaft 21 by a fixing means, so that the rotating body 23 and the governor wheel 22 rotate integrally with the rotating shaft 21. Also, for example, a configuration may be adopted in which the rotating body 23 is fixed to the governor wheel 22 by a fixing means, and the rotating body 23 and the governor wheel 22 rotate relative to the rotating shaft 21.

[0033] The configuration of the fixing means is not particularly limited, and may be, for example, a fastening means (for example, a bolt and a nut), or may be, for example, a screw mechanism in which threaded portions are provided on the rotor 23 and the governor wheel 22 (rotating shaft 21) respectively and the threaded portions are screwed together, or may be, for example, welding.

[0034] The governor wheel 22 may include, for example, as in this embodiment, an annular portion 22a around which the governor rope 11 is wound, a shaft portion 22b connected to the rotating shaft 21, and a plurality of intermediate portions 22c connecting the annular portion 22a and the shaft portion 22b. This allows the governor wheel 22 to rotate at a rotational speed corresponding to the moving speed of the car 2.

[0035] The rotating body 23 may include, for example, as in this embodiment, an annular portion 23a formed in an annular shape, a shaft portion 23b connected to the rotating shaft 21, and a plurality of intermediate portions 23c, 23d connecting the annular portion 23a and the shaft portion 23b. Of the plurality of intermediate portions 23c, 23d, the intermediate portion 23d that is connected to the link mechanism 30 and thereby supports the link mechanism 30 is also referred to as the support portion 23d.

[0036] The link mechanism 30 may, for example, as in this embodiment, include a first link 31 fixedly attached to the first weight 24, a second link 32 rotatably connected to the first link 31, a third link 33 fixedly attached to the second weight 25, and a fourth link 34 rotatably connected to the third link 33 and the first weight 24, respectively.

[0037] The link mechanism 30 also includes connection portions 35 and 36 that rotatably connect the links 31 and 33 to the rotating body 23. The connection portions 35 and 36 may include, for example, a first connection portion 35 that rotatably connects the first link 31 to the support portion 23d of the rotating body 23, and a second connection portion 36 that rotatably connects the third link 33 to the support portion 23d of the rotating body 23, as in the present embodiment.

[0038] Furthermore, for example, support portion 23d of rotating body 23 may include hole portion 23e, and second link 32 may include insertion portion 32a inserted into hole portion 23e and holding portion 32b holding elastic portion 26 between second link 32 and holding portion 32b of support portion 23d. In this way, elastic portion 26 is held between holding portion 32b of second link 32 and support portion 23d (hole portion 23e) of rotating body 23 in an elastically deformable manner.

[0039] Elastic portion 26 applies an elastic restoring force to weights 24, 25 so that weights 24, 25 move closer to rotation axis 21. For example, as in this embodiment, elastic portion 26 may be a cylindrical elastic material (for example, a helical spring), and elastic portion 26 may apply an elastic restoring force tending to extend to weights 24, 25 via link mechanism 30.

[0040] As the car 2 moves and the governor wheel 22 and the rotor 23 rotate (spin), the link mechanism 30 and the weights 24, 25 also rotate (revolve), and a centrifugal force greater than the elastic restoring force from the elastic portion 26 acts on the weights 24, 25. As a result, the weights 24, 25 move away from the rotor shaft 21. At this time, the second link 32 moves inside the hole 23e of the rotor 23, elastically deforming the elastic portion 26 so as to contract it.

[0041] As a result, when the moving speed of the car 2 reaches the set speed, the weights 24, 25 move to the set position (the position shown by the two-dot chain line in FIG. 4). At this time, for example, as in this embodiment, the weights 24, 25 may collide with the actuation portion 13a of the rope stop portion 13, causing the actuation portion 13a to move, and the rope stop portion 13 may be actuated to grip the governor rope 11.

[0042] Although not particularly limited, for example, as in the present embodiment, the setting positions of the weights 24, 25 may be radially inward from the radially outer end (the outer periphery of the annular portion 23a) of the rotor 23. This makes it possible to prevent the weights 24, 25 from protruding radially outward from the rotor 23, for example.

[0043] Incidentally, because the link mechanism 30 is connected to the rotating body 23, which is separate from the governor wheel 22, the link mechanism 30 can be configured as desired, regardless of the configuration of the governor wheel 22. This makes it possible to prevent the configuration of the link mechanism 30 from being restricted by the configuration of the governor wheel 22. Therefore, for example, the degree of freedom in designing the link mechanism 30 can be increased, and accordingly, the degree of freedom in designing the governor 20, including the weights 24, 25 and the elastic portion 26, can also be increased.

[0044] In the present embodiment, the first connecting portion 35 and the second connecting portion 36 are disposed radially outward from the outer periphery of the governor wheel 22 as viewed in the axial direction D1. This prevents the positions of the first connecting portion 35 and the second connecting portion 36 from being restricted by the configuration of the governor wheel 22.

[0045] Furthermore, in this embodiment, when the governor wheel 22 and the rotor 23 are stopped, a portion of the first weight 24 and a portion of the second weight 25 are disposed radially outward from the outer periphery of the governor wheel 22 as viewed in the axial direction D1. As a result, the weights 24, 25 are far away from the rotor shaft 21 in the radial direction, and therefore, when the governor wheel 22 and the rotor 23 are rotating, the centrifugal force acting on the weights 24, 25 can be increased.

[0046] Here, an example of the design of the governor 20 will be described with reference to Figures 4 and 5. In the governor Y20 according to the reference example of Figure 5, the rotating body 23 also serves as the governor wheel 22, and the governor rope 11 is wound around the outer periphery of the rotating body 23 that also serves as the governor wheel 22. In other words, the governor Y20 according to the reference example of Figure 5 has a configuration in which the link mechanism 30 is connected to the governor wheel 22.

[0047] First, the speed governor 20, Y20 has a natural frequency f. Specifically, the natural frequency f is calculated by the following equation 1. f=(1 / 2π)×(K×L 2 / J) 1 / 2 (Formula 1) Here, K is the spring constant of elastic portion 26, L is the lever length, and J is the moment of inertia of weights 24, 25 (pendulum). Note that lever length L is the distance between the axial center of first connecting portion 35 and the axial center of third connecting portion 37 (connecting portion between first link 31 and second link 32).

[0048] The moment of inertia J1 of one weight 24 (25) is calculated by the following formula 2. J1 = (M / 4) × (D 2 / 2+4R 2 ) (Formula 2) Here, M is the mass of the weight 24 (25), D is the diameter of the weight 24 (25), and R is the distance between the center of gravity of the weight 24 (25) and the center of the first connecting portion 35 (second connecting portion 36).

[0049] Therefore, the moment of inertia J of the two weights 24 and 25 having the same mass M can be calculated by the following equation 3. J = (M / 2) × (D 2 / 2+4R 2 ) (Formula 3)

[0050] Incidentally, for example, abnormal vibrations (abnormal car vibrations) may occur in the car 2 when a person jumps or runs inside the car 2. The abnormal car vibrations have a certain vibration frequency (for example, 2.0 Hz to 5.0 Hz) that is determined to some extent depending on the structure of the elevator 1, for example.

[0051] If the frequency of the abnormal car vibration is the same as or close to the natural frequency f of the speed governor 20, Y20, the occurrence of the abnormal car vibration may cause the speed governor 20, Y20 to erroneously detect the running speed of the car 2 (for example, to detect it as faster than it actually is). In such a case, for example, there is a risk that the rope stop unit 13 may malfunction, causing the car stopping device 2c to malfunction and stop the car 2.

[0052] Therefore, in the speed governor Y20 according to the reference example of Fig. 5, for example, if it is configured so that the weights 24, 25 must be positioned at the set position (the position shown by the two-dot chain line in Fig. 5) when the traveling speed of the car 2 is the set speed, when the spring constant K of the elastic part 26 is changed, the mass M of the weights 24, 25 also needs to be changed in proportion to the spring constant K. In this case, the moment of inertia J of the weights 24, 25 (pendulum) also changes in proportion to the spring constant K, and therefore the natural frequency f of the speed governor Y20 cannot be changed.

[0053] In contrast, in the speed governor 20 according to this embodiment shown in Fig. 4, the rotating body 23 to which the weights 24, 25 are connected via the link mechanism 30 is separate from the governor wheel 22. As a result, by changing the diameter of the governor wheel 22 (changing to a governor wheel 22 with a different diameter) in the speed governor Y20 according to the reference example shown in Fig. 5, it is possible to change the rotational speed of the weights 24, 25 when the traveling speed of the car 2 is the set speed.

[0054] Therefore, even if it is a required configuration that weights 24, 25 are positioned at set positions when the traveling speed of car 2 is at a set speed, this required configuration can be satisfied by changing the spring constant K of elastic section 26 and then changing the rotational speed of weights 24, 25 when the traveling speed of car 2 is at the set speed (specifically, the centrifugal force acting on weights 24, 25).As a result, it is possible to change spring constant K without changing the moment of inertia J of weights 24, 25 (pendulum), and therefore it is possible to change the natural frequency f of governor 20.

[0055] 4 according to this embodiment, for example, if the configuration requires that the weights 24, 25 be positioned at set positions when the traveling speed of the car 2 is at a set speed, the natural frequency f of the governor 20 can be changed by changing the spring constant K of the elastic portion 26 and the diameter of the governor wheel 22 without changing the lever length L and the moment of inertia J of the weights 24, 25. Therefore, for example, it is possible to design a governor 20 having a natural frequency f that is away from the frequency of abnormal car vibration.

[0056] 4, for example, by reducing the diameter of the governor wheel 22, the rotational speed of the weights 24, 25 can be increased when the running speed of the car 2 is at the set speed. As a result, the centrifugal force of the weights 24, 25 increases in proportion to the square of the rotational speed, and therefore, when the running speed of the car 2 is near the set speed, the amount of movement of the weights 24, 25 per unit running speed of the car 2 increases.

[0057] As an example, a comparison will be made between the speed governor 20 according to the present embodiment shown in Fig. 4 and the speed governor Y20 according to the reference example shown in Fig. 5, where the governor wheel 22 and the rotating body 23 are separate entities and only the spring constant K of the elastic portion 26 is changed, and the set positions of the weights 24, 25 (positions when the traveling speed of the car 2 is the set speed) are the same. Specifically, the spring constant K of the elastic portion 26 of the speed governor 20 according to the present embodiment is made larger than the spring constant K of the speed governor Y20 according to the reference example.

[0058] In such a case, in the speed governor 20 according to this embodiment, when the running speed of the car 2 is near the set speed, the movement amount of the weights 24, 25 per unit running speed of the car 2 becomes large compared to the speed governor Y20 according to the reference example. Note that in the speed governor 20 according to this embodiment, when the running speed of the car 2 is near zero, the movement amount of the weights 24, 25 per unit running speed of the car 2 becomes small compared to the speed governor Y20 according to the reference example.

[0059] As another example, a comparison will be made between the speed governor 20 according to the present embodiment shown in Fig. 4 and the speed governor Y20 according to the reference example shown in Fig. 5, which are the same except that the governor wheel 22 and the rotor 23 are separate bodies, but the set positions of the weights 24, 25 (the positions when the traveling speed of the car 2 is the set speed) are different. In other words, the spring constant K of the elastic portion 26 is also the same.

[0060] In such a case, in the governor 20 according to this embodiment, the movement amount of the weights 24, 25 per unit running speed of the car 2 is larger than that of the governor Y20 according to the reference example, regardless of the running speed of the car 2. Note that the setting positions of the weights 24, 25 of the governor 20 according to this embodiment are located radially outward of the setting positions of the weights 24, 25 of the governor Y20 according to the reference example.

[0061] In this way, by reducing the diameter of the governor wheel 22, when the running speed of the car 2 is near the set speed, the amount of movement of the weights 24, 25 per unit running speed of the car 2 increases. In other words, when the positions of the weights 24, 25 are near the set positions, the amount of change in the running speed of the car 2 per unit moving amount of the weights 24, 25 decreases.

[0062] As a result, for example, when adjusting the weights 24, 25 so that they collide with the actuation part 13a of the rope stop part 13 when the travel speed of the car 2 is at a set speed, it is possible to reduce the error in the speed at which the weights 24, 25 collide with the actuation part 13a even if there is an error in the position of the actuation part 13a or the amount of movement (position) of the weights 24, 25. Therefore, for example, it is possible to make the adjustment easier and also to increase the accuracy of the speed at which the weights 24, 25 collide with the actuation part 13a.

[0063] As described above, the elevator governor 20 of this embodiment has the following features: A rotation axis 21, a governor wheel 22 around whose outer periphery a governor rope 11 is wound and which rotates about the rotary shaft 21; a rotor 23 that is separate from the governor wheel 22 and rotates together with the governor wheel 22 about the rotary shaft 21; a link mechanism 30 connected to the rotating body 23 so as to rotate together with the rotating body 23; weights 24, 25 connected to the link mechanism 30 and moving radially outward of the rotary shaft 21 as the rotary body 23 rotates; and an elastic portion 26 that applies an elastic restoring force inward in the radial direction to the weights 24 and 25. This configuration is preferable.

[0064] According to this configuration, the link mechanism 30 is connected to the rotating body 23, which is separate from the governor wheel 22, so the link mechanism 30 rotates together with the rotating body 23 and the governor wheel 22. Furthermore, because the link mechanism 30 is connected to the rotating body 23, the configuration of the link mechanism 30 can be prevented from being restricted by the configuration of the governor wheel 22.

[0065] In addition, in the elevator governor 20, as in this embodiment, The link mechanism 30 includes links 31 and 33 rotatably connected to the rotating body 23 at connection portions 35 and 36, The connection portions 35, 36 are disposed radially outward from an outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotary shaft 21. This configuration is preferable.

[0066] According to this configuration, the links 31, 33 are rotatably connected to the rotating body 23 at the connection portions 35, 36. The connection portions 35, 36 are disposed radially outward of the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. This makes it possible to prevent the positions of the connection portions 35, 36 from being restricted by the configuration of the governor wheel 22.

[0067] In addition, in the elevator governor 20, as in this embodiment, When the governor wheel 22 and the rotating body 23 are stopped, at least a portion of the weights 24, 25 is disposed radially outward from an outer periphery of the governor wheel 22 as viewed in the axial direction D1 of the rotating shaft 21. This configuration is preferable.

[0068] According to this configuration, when the governor wheel 22 and the rotor 23 are stopped, at least a portion of the weights 24, 25 is disposed radially outward from the outer periphery of the governor wheel 22 as viewed in the axial direction D1 of the rotor shaft 21, and therefore the weights 24, 25 are far away in the radial direction from the rotor shaft 21. This makes it possible to increase the centrifugal force acting on the weights 24, 25 when the governor wheel 22 and the rotor 23 are rotating.

[0069] In addition, in the elevator governor 20, as in this embodiment, The rotating body 23 is fixed to the governor wheel 22 by being fixed to at least one of the rotating shaft 21 and the governor wheel 22, and is in contact with the governor wheel 22 in the axial direction D1 of the rotating shaft 21. This configuration is preferable.

[0070] According to this configuration, the rotating body 23 is fixed to the governor wheel 22, so the rotating body 23 rotates together with the governor wheel 22. Furthermore, because the rotating body 23 is in contact with the governor wheel 22 in the axial direction D1 of the rotating shaft 21, the dimensions of the rotating body 23 and the governor wheel 22 in the axial direction D1 of the rotating shaft 21 can be reduced.

[0071] In addition, the elevator 1, as in this embodiment, The elevator is provided with the elevator governor 20. This configuration is preferable.

[0072] With this configuration, the configuration of the link mechanism 30 can be prevented from being restricted by the configuration of the governor wheel 22.

[0073] The elevator 1 and the elevator governor 20 are not limited to the configurations of the above-described embodiments, and are not limited to the above-described effects. Furthermore, the elevator 1 and the elevator governor 20 can, of course, be modified in various ways without departing from the spirit of the present invention. For example, it is possible to arbitrarily select one or more of the configurations, methods, etc. of the various modified examples described below and adopt them in the configurations, methods, etc. of the above-described embodiments.

[0074] (A) In the elevator governor 20 according to the above embodiment, the first connection portion 35 and the second connection portion 36 are configured to be disposed radially outward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. That is, in the link mechanism 30, all of the connection portions 35, 36 that rotatably connect the links 31, 33 to the rotating body 23 are configured to be disposed radially outward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. However, the elevator governor 20 is not limited to this configuration.

[0075] For example, in the link mechanism 30, some of the connection portions 35, 36 that rotatably connect the links 31, 33 to the rotating body 23 may be configured to be disposed radially outward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. Also, for example, in the link mechanism 30, all of the connection portions 35, 36 that rotatably connect the links 31, 33 to the rotating body 23 may be configured to be disposed radially inward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21.

[0076] (B) Furthermore, in the elevator governor 20 according to the above embodiment, when the governor wheel 22 and the rotating body 23 are stopped, a portion of the weights 24, 25 is disposed radially outward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. However, the elevator governor 20 is not limited to this configuration.

[0077] For example, when the governor wheel 22 and the rotating body 23 are stopped, the entire weights 24, 25 may be arranged radially outward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21. Also, for example, when the governor wheel 22 and the rotating body 23 are stopped, the entire weights 24, 25 may be arranged radially inward from the outer periphery of the governor wheel 22 when viewed in the axial direction D1 of the rotating shaft 21.

[0078] (C) Furthermore, in the elevator governor 20 according to the above embodiment, the rotating body 23 is configured to be in contact with the governor wheel 22 in the axial direction D1 of the rotating shaft 21. However, the elevator governor 20 is not limited to such a configuration.

[0079] For example, the rotating body 23 may be configured to be separated from the governor wheel 22 in the axial direction D1 of the rotating shaft 21. Although not particularly limited, as an example of such a configuration, the elevator governor 20 may have the configuration shown in FIG.

[0080] Specifically, in the elevator governor 20, as shown in FIG. 6, The governor wheel 22 is fixed to the rotary shaft 21, The rotor 23 is fixed to the rotary shaft 21 and is spaced apart from the governor wheel 22 in the axial direction D1 of the rotary shaft 21. The following configuration is also possible.

[0081] According to this configuration, the rotor 23 is spaced apart from the governor wheel 22 in the axial direction D1 of the rotating shaft 21, but the governor wheel 22 is fixed to the rotating shaft 21, and the rotor 23 is also fixed to the rotating shaft 21. As a result, the rotor 23 rotates together with the governor wheel 22.

[0082] (D) Furthermore, in the elevator governor 20 according to the above embodiment, the rotating body 23 is configured to include an annular portion 23a formed in an annular shape, a shaft portion 23b connected to the rotating shaft 21, and a plurality of support portions 23d connecting the annular portion 23a and the shaft portion 23b. However, the elevator governor 20 is not limited to this configuration.

[0083] 7, the rotating body 23 may have a configuration including a shaft portion 23b connected to the rotating shaft 21 and a support portion 23d extending from the shaft portion 23b radially outward of the rotating shaft 21 and supporting the link mechanism 30, but not including the annular portion 23a. In this way, the configuration of the rotating body 23 is not particularly limited.

[0084] (E) In addition, in the elevator 1 according to the above embodiment, the governor rope 11 is connected to the car 2, and the car 2 is equipped with a car stopping device 2c. However, the elevator speed governor 20 is not limited to this configuration. For example, the governor rope 11 may be connected to the counterweight 7, and the counterweight 7 may be equipped with a counterweight stopping device on the counterweight rail 8 that stops the counterweight 7 when the traveling speed of the car 2 reaches a set speed.

[0085] (F) For example, the elevator 1 may be configured to include a roller in contact with the outer periphery of the rotating body 23 and a rotation detection unit (e.g., an encoder) that detects the rotation of the roller. The rotation detection unit may output the detection result as an electric signal to the processing unit 5, for example.

[0086] (G) For example, the order of execution of each step, such as the operations, procedures, steps, and stages, in the methods and apparatuses shown in the claims, specifications, and drawings, can be implemented in any order, as long as the result of a previous step is not used in a subsequent step. For example, even if a description is made using "first," "next," etc. for convenience, this does not mean that execution is required in that order. [Explanation of symbols]

[0087] 1... elevator, 2... car, 2a... car room, 2b... car frame, 2c... car stopping device, 3... car drive unit, 3a... sheave, 3b... drive source, 3c... braking unit, 4... car rail, 5... processing unit, 6... car rope, 7... balancing weight, 8... weight rail, 10... speed governor, 11... governor rope, 12... tension wheel, 13... rope stop unit, 13a... starting unit, 20... elevator speed governor, 21... rotating shaft, 22... governor wheel, 22a... ring portion, 22b... shaft portion, 22c... intermediate portion, 23... rotating body, 2 3a... annular portion, 23b... shaft portion, 23c... intermediate portion, 23d... support portion (intermediate portion), 23e... hole portion, 24... first weight, 25... second weight, 26... elastic portion, 27... pivot support portion, 30... link mechanism, 31... first link, 32... second link, 32a... insertion portion, 32b... holding portion, 33... third link, 34... fourth link, 35... first connecting portion, 36... second connecting portion, 37... third connecting portion, D1... first horizontal direction (axial direction), D2... second horizontal direction, D3... up / down direction, X1... elevator shaft, X2... machine room

Claims

1. A rotation axis; a governor wheel having a governor rope wound around its outer periphery and rotating about the rotary shaft; a rotating body that is separate from the governor wheel and rotates together with the governor wheel about the rotation shaft; a link mechanism connected to the rotating body so as to rotate together with the rotating body; a weight connected to the link mechanism and moving radially outwardly of the rotation shaft as the rotating body rotates; an elastic portion that applies an elastic restoring force inward in the radial direction to the weight.

2. the link mechanism includes a link rotatably connected to the rotating body at a connection portion, The elevator governor according to claim 1 or 2, wherein the connection portion is disposed radially outward from an outer periphery of the governor wheel when viewed in the axial direction of the rotary shaft.

3. 3. The elevator governor according to claim 1, wherein at least a portion of the weight is disposed radially outward from an outer periphery of the governor wheel when viewed in the axial direction of the rotating shaft when the governor wheel and the rotating body are stopped.

4. 3. The elevator governor according to claim 1, wherein the rotating body is fixed to at least one of the rotating shaft and the governor wheel, thereby being fixed to the governor wheel, and is in contact with the governor wheel in the axial direction of the rotating shaft.

5. The governor wheel is fixed to the rotary shaft, 3. The elevator governor according to claim 1, wherein the rotor is fixed to the rotary shaft and is spaced apart from the governor wheel in the axial direction of the rotary shaft.

6. An elevator comprising the elevator governor according to claim 1 or 2.

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