Elevator speed governor

Abstract

To provide an elevator governor capable of further reliably suppressing an incorrect operation of a switch lever.SOLUTION: In a governor 7, a switch lever 752 faces a first side surface 72a among the first side surface 72a and a second side surface 72b of a governor sheave 72. A scraper 9 has a first scraper body 92 and a second scraper body 93. The first scraper body 92 has a first facing part 923 facing the first side surface 72a. The second scraper body 93 has a second facing part 933 facing the first side surface 72a. The switch lever 752 is disposed between the first facing part 923 and the second facing part 933 in the circumferential direction of the governor sheave 72.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to a speed regulator for an elevator.

Background Art

[0002] In the speed regulator of an elevator, the oil adhering to the side surface of the speed regulator wire rope may solidify. When the solidified oil operates the operating piece of the switch of the speed regulator while the speed regulator wire rope is rotating, the car 2 will suddenly stop.

[0003] Patent Document 1 discloses an elevator speed regulator in which a removing device for removing the solidified oil is opposed to the side surface of the speed regulator wire rope in order to prevent the operating piece of the switch from being operated by the solidified oil. The removing device is arranged below the switch.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The speed regulator wire rope rotates in both the forward and reverse directions according to the moving direction of the car. In the conventional elevator speed regulator disclosed in Patent Document 1, when the speed regulator wire rope rotates in the forward direction, the solidified oil can be removed by the removing device before reaching the operating piece of the switch. However, when the speed regulator wire rope rotates in the reverse direction, the solidified oil reaches the position of the removing device after passing the position of the operating piece of the switch. Therefore, when the speed regulator wire rope rotates in the reverse direction, the operating piece of the switch is likely to be operated by the solidified oil. Therefore, in the conventional elevator speed regulator, an incorrect operation of the operating piece of the switch by the solidified oil is likely to occur.

[0006] This disclosure aims to solve the above-mentioned problems and to provide an elevator governor that can more reliably suppress erroneous operation of the switch lever. [Means for solving the problem]

[0007] The elevator governor according to this disclosure comprises a governor sheave around which a governor rope that moves with the movement of the car is wound, a flyweight that displaces relative to the governor sheave in accordance with the rotational speed of the governor sheave, a switch lever which is operated by the flyweight when the rotational speed of the governor sheave reaches a set excessive speed, and a scraper facing the governor sheave, wherein the switch lever faces the first side of the first and second sides of the governor sheave, and the scraper faces the first side The device comprises a scraper body and a second scraper body. The first scraper body has a first opposing portion facing the first side surface, and the second scraper body has a second opposing portion facing the first side surface. A switch lever is positioned between the first opposing portion and the second opposing portion in the circumferential direction of the governor sheave. The gap between the first side surface and the first opposing portion is narrower than the gap between the first side surface and the switch lever, and the gap between the first side surface and the second opposing portion is narrower than the gap between the first side surface and the switch lever. [Effects of the Invention]

[0008] According to this disclosure, accidental operation of the switch lever can be more reliably suppressed. [Brief explanation of the drawing]

[0009] [Figure 1] This is a configuration diagram showing an elevator according to Embodiment 1. [Figure 2] Figure 1 is a perspective view showing the governor. [Figure 3] Figure 2 is a front view showing the governor. [Figure 4] Figure 2 is a rear view showing the governor. [Figure 5]This is a side view of the governor as seen along arrow V in Figure 3. [Figure 6] Figure 2 is a perspective view showing the mounting member. [Figure 7] Figure 2 is a perspective view showing the body of the first scraper. [Figure 8] Figure 2 is a perspective view showing the body of the second scraper. [Figure 9] This is a cross-sectional view along the line IX-IX in Figure 3. [Figure 10] This is a cross-sectional view along line XX in Figure 3. [Modes for carrying out the invention]

[0010] The embodiments for carrying out the subject matter of this disclosure will be described with reference to the attached figures. In each figure, the same or corresponding parts are denoted by the same reference numerals, and redundant explanations are simplified or omitted as appropriate. The subject matter of this disclosure is not limited to the following embodiments, and any modification of any component of the embodiments or omission of any component of the embodiments is possible without departing from the spirit of this disclosure.

[0011] Embodiment 1. Figure 1 is a diagram showing the configuration of an elevator according to Embodiment 1. In the figure, a car 2 and a counterweight 3 are installed in the hoistway 1 so as to be movable in the vertical direction. A hoisting machine 4 is installed in the lower part of the hoistway 1. The hoisting machine 4 generates a driving force to move the car 2 and the counterweight 3 in the vertical direction.

[0012] The hoisting machine 4 comprises a hoisting machine body 41 and a drive sheave 42. The hoisting machine body 41 includes a motor and a brake. The drive sheave 42 is rotatably mounted on the hoisting machine body 41.

[0013] When power is supplied to the hoist main body 41, the drive sheave 42 rotates with respect to the hoist main body 41 by the driving force of the motor of the hoist main body 41. When the power supply to the hoist main body 41 is interrupted, the rotation of the drive sheave 42 with respect to the hoist main body 41 stops due to the operation of the brake of the hoist main body 41.

[0014] At the upper part in the hoistway 1, two car side return pulleys 11 and a counterweight side return pulley 12 are provided. Each car side return pulley 11 and counterweight side return pulley 12 is supported by a machine base (not shown) fixed in the hoistway 1.

[0015] The car 2 and the counterweight 3 are suspended in the hoistway 1 by the main rope 5. The main rope 5 has a first end portion and a second end portion. The first end portion of the main rope 5 is connected to the upper part of the car 2. The second end portion of the main rope 5 is connected to the upper part of the counterweight 3. The main rope 5 is wound around the two car side return pulleys 11, the drive sheave 42, and the counterweight side return pulley 12 in this order from the first end portion and reaches the second end portion. Thereby, the suspension method of the car 2 and the counterweight 3 by the main rope 5 is a 1:1 roping method. The car 2 and the counterweight 3 move vertically in the hoistway 1 by the rotation of the drive sheave 42.

[0016] In the hoistway 1, a pair of car guide rails 13 and a pair of counterweight guide rails 14 are installed. In FIG. 1, one car guide rail 13 and one counterweight guide rail are shown respectively. The car 2 moves vertically in the hoistway 1 while being guided by the pair of car guide rails 13. The counterweight 3 moves vertically in the hoistway 1 while being guided by the pair of counterweight guide rails 14.

[0017] A safety stop device 6 is provided at the lower part of the car 2. An operation part 61 is connected to the safety stop device 6. The safety stop device 6 performs an emergency operation of gripping the car guide rail <0 by the operation of the operation part 61. The movement of the car 2 stops due to the emergency operation of the safety stop device 6.

[0018] At the upper part inside the hoistway 1, a speed governor 7 is provided. At the lower part inside the hoistway 1, a counterweight wheel 8 is provided. A speed governor rope 10 is wound around the speed governor 7 and the counterweight wheel 8.

[0019] The speed governor 7 is supported by a support member 17. The support member 17 is fixed to the car guide rail 13 by a rail clip 18. A counterweight 81 is attached to the counterweight wheel 8. The counterweight wheel 8 and the counterweight 81 are suspended from the speed governor 7 via the speed governor rope 10. Thus, tension is always applied to the speed governor rope 10.

[0020] Both ends of the speed governor rope 10 are connected to the operation part 61. Therefore, the speed governor rope 10 is stretched in a loop between the speed governor 7 and the counterweight wheel 8. The speed governor rope 10 moves as the car 2 moves.

[0021] Figure 2 is a perspective view showing the speed governor 7 of Figure 1. Figure 3 is a front view showing the speed governor 7 of Figure 2. Figure 4 is a rear view showing the speed governor 7 of Figure 2. Figure 5 is a side view showing the speed governor 7 when viewed along the arrow V in Figure 3. The speed governor 7 has a frame 71, a speed governor sheave 72, a pair of flyweights 73, a balance spring 74, a switch 75, a scraper 9, and a gripping mechanism (not shown).

[0022] The frame 71 has a bottom plate part 711, a first side plate part 712, and a second side plate part 713. The bottom plate part 711 is arranged horizontally. The first side plate part 712 and the second side plate part 713 are arranged parallel to each other in a state standing on the bottom plate part 711.

[0023] The first side plate part 712 has a first side plate main body part 712a and a first side plate protruding part 712b. The first side plate protruding part 712b protrudes upward from a part of the upper end of the first side plate main body part 712a. The first side plate main body part 712a faces the second side plate part 713.

[0024] The bottom plate portion 711 is connected between the lower ends of the first side plate portion 712 and the second side plate portion 713. The bottom plate portion 711 is fixed to the support member 17 by bolts or the like.

[0025] The governor sheave 72 is rotatably supported on the frame 71. The governor sheave 72 is positioned in the range between the first side plate portion 712 and the second side plate portion 713 in the axial direction of the governor sheave 72. The governor sheave 72 is provided with a pivot shaft that is coaxial with the axis of the governor sheave 72. The pivot shaft of the governor sheave 72 is horizontally mounted on the first side plate body portion 712a and the second side plate portion 713. The pivot shaft of the governor sheave 72 is perpendicular to the first side plate body portion 712a and the second side plate portion 713, respectively. The governor sheave 72 is rotatable relative to the frame 71 about its axis.

[0026] The governor rope 10 is wound around the governor sheave 72. A rope groove is formed on the outer circumference of the governor sheave 72 along its circumferential direction. The governor rope 10 is wound around the governor sheave 72 along the rope groove. As a result, the governor sheave 72 rotates in accordance with the movement of the governor rope 10 and the car 2. That is, as shown in Figure 3, the governor sheave 72 rotates in a first direction A as the car 2 moves downward, and rotates in a second direction B as the car 2 moves upward. The first direction A and the second direction B are opposite directions. The direction of rotation of the governor sheave 72 corresponds to the direction of movement of the car 2. The rotational speed of the governor sheave 72 corresponds to the speed of movement of the car 2. The bottom plate 711 is positioned to avoid the governor rope 10.

[0027] The governor sheave 72 is provided with a pair of mounting shafts 721. Each of the pair of mounting shafts 721 is positioned parallel to the axis of the governor sheave 72. A pair of flyweights 73 are individually mounted on the governor sheave 72 via the pair of mounting shafts 721. Each flyweight 73 is rotatable relative to the governor sheave 72 about the mounting shaft 721.

[0028] Each flyweight 73 rotates around the mounting shaft 721 in accordance with the centrifugal force generated by the rotation of the governor sheave 72. As a result, each flyweight 73 is displaced relative to the governor sheave 72 in accordance with the rotational speed of the governor sheave 72. A pair of flyweights 73 are connected to each other via a link 732.

[0029] The balance spring 74 is connected between one of the flyweights 73 and the governor sheave 72. The balance spring 74 is an elastic body that resists centrifugal force. As the rotational speed of the governor sheave 72 increases, each flyweight 73 is displaced relative to the governor sheave 72 against the elastic restoring force of the balance spring 74.

[0030] One of the flyweights 73 has a projection bolt 731 as an actuation piece. The projection bolt 731 protrudes radially outward from the weight body of the one flyweight 73 toward the governor sheave 72. The projection bolt 731 moves toward the axis away from the governor sheave 72 as the one flyweight 73 is displaced relative to the governor sheave 72 against the elastic restoring force of the balance spring 74.

[0031] The governor sheave 72 has a first side surface 72a and a second side surface 72b formed on its outer circumference. The first side surface 72a and the second side surface 72b are each annular surfaces centered on the axis of the governor sheave 72. The first side surface 72a and the second side surface 72b are sides that face opposite each other in the axial direction of the governor sheave 72. The governor sheave 72 is supported by the frame 71 with the first side surface 72a facing the first side plate body portion 712a and the second side surface 72b facing the second side plate portion 713.

[0032] The first side surface 72a shows the sheave reference line 722. The sheave reference line 722 is a marker that serves as a reference for the installation position of the scraper 9. The sheave reference line 722 is a circle centered on the axis of the governor sheave 72. Each flyweight 73, balance spring 74, link 732 and projection bolt 731 is positioned closer to the axis of the governor sheave 72 than the sheave reference line 722.

[0033] The switch 75 comprises a switch body 751 and a switch lever 752. The switch body 751 is attached to the first side plate projection 712b of the frame 71 by a plurality of bolts 753. The switch body 751 is positioned radially outward from the outer circumference of the governor sheave 72.

[0034] The switch lever 752 protrudes from the switch body 751 toward the axis of the governor sheave 72. The switch lever 752 is positioned closer to the first side plate portion 712 than to the governor sheave 72 in the axial direction of the governor sheave 72. As a result, the switch lever 752 faces the first side surface 72a.

[0035] The tip of the switch lever 752 is positioned closer to the axis of the governor sheave 72 than to the sheave reference line 722. The tip of the switch lever 752 is positioned on the track of the projection bolt 731 when the rotational speed of the governor sheave 72 reaches the set excessive speed. Therefore, when the rotational speed of the governor sheave 72 reaches the set excessive speed, the switch lever 752 is operated by the projection bolt 731. The set excessive speed is a speed greater than the rotational speed of the governor sheave 72 during normal operation. The switch body 751 performs a shut-off operation that cuts off the power supply to the hoisting machine 4 when the switch lever 752 is operated.

[0036] As the rotational speed of the governor sheave 72 increases beyond the set overspeed, the centrifugal force acting on each flyweight 73 increases. This causes each flyweight 73 to be further displaced relative to the governor sheave 72.

[0037] The gripping mechanism is supported by the frame 71. When the rotational speed of the governor sheave 72 reaches the emergency stop overspeed, the position of each flyweight 73 relative to the governor sheave 72 becomes the gripping position. The emergency stop overspeed is a speed greater than the set overspeed. The gripping mechanism performs a gripping operation to grasp the governor rope 10 by displacing each flyweight 73 to the gripping position relative to the governor sheave 72.

[0038] The scraper 9 is attached to the second side plate portion 713. As shown in Figure 5, the scraper 9 and the switch 75 are positioned in the range between the first side plate portion 712 and the second side plate portion 713 in the axial direction of the governor sheave 72. The scraper 9 and the switch 75 are attached to different side plate portions of the first side plate portion 712 and the second side plate portion 713. The scraper 9 has a mounting member 91, a first scraper body 92, and a second scraper body 93.

[0039] The mounting member 91 is an angle member. One end of the mounting member 91 in the longitudinal direction is a fixed end, and the other end in the longitudinal direction is a free end. The fixed end of the mounting member 91 is attached to the second side plate portion 713. When the fixed end of the mounting member 91 is attached to the second side plate portion 713, the free end of the mounting member 91 is located above the fixed end of the mounting member 91. When viewed along the axis of the governor sheave 72, the mounting member 91 is positioned on the outside of the governor sheave 72, as shown in Figure 4.

[0040] Figure 6 is a perspective view showing the mounting member 91 of Figure 2. The mounting member 91 has a mounting plate portion 911 for the frame and a mounting plate portion 912 for the scraper body.

[0041] Both the frame mounting plate portion 911 and the scraper body mounting plate portion 912 are arranged along the longitudinal direction of the mounting member 91. The scraper body mounting plate portion 912 is fixed to the frame mounting plate portion 911. Furthermore, the scraper body mounting plate portion 912 is perpendicular to the frame mounting plate portion 911. Therefore, when the mounting member 91 is viewed along its longitudinal direction, the shape of the mounting member 91 is L-shaped due to the frame mounting plate portion 911 and the scraper body mounting plate portion 912.

[0042] The frame mounting plate portion 911 is provided with a plurality of frame through holes 914. The scraper body mounting plate portion 912 is provided with a plurality of first body through holes 915 and a plurality of second body through holes 916. Each frame through hole 914 and each second body through hole 916 is located at the fixed end of the mounting member 91. Each first body through hole 915 is located at the free end of the mounting member 91.

[0043] Each frame through-hole 914 is a round hole. Each first main body through-hole 915 and each second main body through-hole 916 are elongated holes aligned with the longitudinal direction of the mounting member 91. In this embodiment, each of the frame through-hole 914, first main body through-hole 915, and second main body through-hole 916 is provided in two locations on the mounting member 91.

[0044] As shown in Figure 4, the fixed end of the mounting member 91 is attached to the second side plate portion 713 by a plurality of frame mounting bolts 90 that pass through the frame through-holes 914. At the fixed end of the mounting member 91, the frame mounting plate portion 911 overlaps the second side plate portion 713 via a backing plate 94. Each frame mounting bolt 90 fastens the frame mounting plate portion 911 to the second side plate portion 713 together with the backing plate 94.

[0045] The frame mounting plate portion 911 is positioned perpendicular to the axial direction of the governor sheave 72. The scraper body mounting plate portion 912 is positioned along the axial direction of the governor sheave 72.

[0046] As shown in Figure 5, the mounting member 91 is positioned closer to the second side plate portion 713 than to the first side surface 72a in the axial direction of the governor sheave 72. The second side surface 72b is located within the range of the scraper body mounting plate portion 912 in the axial direction of the governor sheave 72.

[0047] As shown in Figure 3, the first scraper body 92 and the second scraper body 93 are each attached to the scraper body mounting plate portion 912. The first scraper body 92 is positioned so that its width direction coincides with the axial direction of the governor sheave 72. The second scraper body 93 is positioned so that its width direction coincides with the axial direction of the governor sheave 72.

[0048] Figure 7 is a perspective view showing the first scraper body 92 of Figure 2. The first scraper body 92 has a first mounting portion 921, a first retaining portion 922, and a first opposing portion 923. Each of the first mounting portion 921, the first retaining portion 922, and the first opposing portion 923 is a plate-like portion. Each of the first mounting portion 921, the first retaining portion 922, and the first opposing portion 923 is arranged along the width direction of the first scraper body 92. In this embodiment, the first scraper body 92 is formed by bending a single metal plate.

[0049] The first retaining portion 922 is provided with a first mounting portion 921 and a first opposing portion 923. When the first scraper body 92 is viewed along the width direction of the first scraper body 922, the first mounting portion 921 protrudes from one end of the first retaining portion 922, and the first opposing portion 923 protrudes from the other end of the first retaining portion 922.

[0050] The first mounting portion 921 and the first opposing portion 923 protrude from the first retaining portion 922 toward opposite sides in the thickness direction of the first retaining portion 922. The side on which the first mounting portion 921 protrudes relative to the first retaining portion 922 is the switch side of the first retaining portion 922. The side on which the first opposing portion 923 protrudes relative to the first retaining portion 922 is the non-switch side of the first retaining portion 922.

[0051] The first mounting portion 921 is perpendicular to the first retaining portion 922. The first mounting portion 921 is provided with a plurality of first screw holes 924. In this embodiment, two first screw holes 924 are provided in the first mounting portion 921.

[0052] The first opposing portion 923 is inclined with respect to the first retaining portion 922. When the first opposing portion 923 and the first retaining portion 922 are viewed along the thickness direction of the first retaining portion 922, the first opposing portion 923 protrudes from the first retaining portion 922 toward the area outside the first retaining portion 922.

[0053] The first opposing portion 923 has a first front surface 923a and a first back surface 923b. The first front surface 923a and the first back surface 923b are two surfaces that face opposite each other in the thickness direction of the first opposing portion 923.

[0054] In the state where the first scraper body 92 is positioned with the first mounting portion 921 facing downwards, the first opposing portion 923 is positioned with the first front surface 923a facing upwards and the first back surface 923b facing downwards.

[0055] The first opposing portion 923 is provided only at one end of the first scraper body 92 in the width direction of the first scraper body 92. As a result, the dimensions of the first opposing portion 923 in the width direction of the first scraper body 92 are smaller than the dimensions of the first retaining portion 922 in the width direction of the first scraper body 92. The multiple first screw holes 924 are provided at positions outside the range of the first opposing portion 923 in the width direction of the first scraper body 92.

[0056] As shown in Figure 3, the first scraper body 92 is attached to the free end of the scraper body mounting plate portion 912 by a plurality of first body mounting bolts 96. As a result, the first scraper body 92 is positioned above the switch lever 752.

[0057] The first mounting portion 921 overlaps the mounting plate portion 912 for the scraper body. The first mounting portion 921 is attached to the mounting plate portion 912 for the scraper body by screwing the first mounting bolt 96, which is passed through the first through hole 915 for the first body, into the first threaded hole 924 of the first mounting portion 921.

[0058] The through-hole 915 for the first main body is an elongated hole aligned with the longitudinal direction of the mounting member 91. Therefore, the position of each first main body mounting bolt 96 within the through-hole 915 is adjustable in the longitudinal direction of the mounting member 91. The position of the first scraper body 92 relative to the mounting member 91 is adjustable in the longitudinal direction of the mounting member 91 by loosening each first main body mounting bolt 96.

[0059] The first retaining portion 922 faces the outer circumference of the governor sheave 72 in the radial direction. As shown in Figure 2, the dimensions of the first retaining portion 922 in the axial direction of the governor sheave 72 are larger than the thickness dimension of the outer circumference of the governor sheave 72 in the axial direction. The thickness dimension of the outer circumference of the governor sheave 72 is the dimension from the first side surface 72a to the second side surface 72b. The first side surface 72a and the second side surface 72b are located within the range of the first retaining portion 922 in the axial direction of the governor sheave 72.

[0060] As shown in Figure 3, the first retaining portion 922 protrudes from the free end of the mounting member 91 toward the outer circumference of the governor sheave 72 when viewed along the axial direction of the governor sheave 72. The governor rope 10 passes between the outer circumference of the governor sheave 72 and the first retaining portion 922.

[0061] As shown in Figure 2, the first opposing portion 923 is located at a position away from the mounting member 91 in the axial direction of the governor sheave 72. Furthermore, the first opposing portion 923 is positioned closer to the first side plate portion 712 than to the governor sheave 72 in the axial direction of the governor sheave 72. Therefore, the first opposing portion 923 is positioned on the opposite side of the governor sheave 72 from the second side plate portion 713.

[0062] As shown in Figure 3, the first opposing portion 923 is positioned with its first back surface 923b facing radially inward of the governor sheave 72 and its first front surface 923a facing radially outward of the governor sheave 72. The virtual plane including the first back surface 923b is perpendicular to the first side surface 72a. The virtual plane including the first front surface 923a is also perpendicular to the first side surface 72a. When viewed along the axial direction of the governor sheave 72, the first opposing portion 923 is positioned radially outward from the sheave reference line 722.

[0063] The first opposing portion 923 faces the first side surface 72a of the governor sheave 72. The gap between the first opposing portion 923 and the first side surface 72a is narrower than the gap between the switch lever 752 and the first side surface 72a.

[0064] As shown in Figure 3, the first opposing portion 923 protrudes from the first retaining portion 922 in the circumferential direction of the governor sheave 72, away from the switch lever 752. Of the two ends of the first opposing portion 923 in the direction of protrusion, the end closer to the first retaining portion 922 is the base end of the first opposing portion 923, and the end further away from the first retaining portion 922 is the tip end of the first opposing portion 923. The distance from the tip end of the first opposing portion 923 to the axis of the governor sheave 72 is greater than the distance from the base end of the first opposing portion 923 to the axis of the governor sheave 72. In other words, of the two ends of the first opposing portion 923 in the circumferential direction of the governor sheave 72, the distance from the end furthest from the switch lever 752 to the axis of the governor sheave 72 is greater than the distance from the end furthest from the switch lever 752 to the axis of the governor sheave 72.

[0065] Figure 8 is a perspective view showing the second scraper body 93 of Figure 2. The second scraper body 93 has a second mounting portion 931, a second retaining portion 932, and a second opposing portion 933. Each of the second mounting portion 931, the second retaining portion 932, and the second opposing portion 933 is a plate-like portion. Each of the second mounting portion 931, the second retaining portion 932, and the second opposing portion 933 is arranged along the width direction of the second scraper body 93. In this embodiment, the second scraper body 93 is formed by bending a single metal plate.

[0066] The second retaining portion 932 is provided with a second mounting portion 931 and a second opposing portion 933. When the second scraper body 93 is viewed along the width direction of the second scraper body 933, the second mounting portion 931 protrudes from one end of the second retaining portion 932, and the second opposing portion 933 protrudes from the other end of the second retaining portion 932.

[0067] The second mounting portion 931 and the second opposing portion 933 protrude from the second retaining portion 932 toward opposite sides in the thickness direction of the second retaining portion 932. The side on which the second mounting portion 931 protrudes relative to the second retaining portion 932 is the switch side of the second retaining portion 932. The side on which the second opposing portion 933 protrudes relative to the second retaining portion 932 is the non-switch side of the second retaining portion 932.

[0068] The second mounting portion 931 is perpendicular to the second retaining portion 932. The second mounting portion 931 is provided with a plurality of second screw holes 934. In this embodiment, two second screw holes 934 are provided in the second mounting portion 931.

[0069] The second opposing portion 933 is inclined with respect to the second retaining portion 932. When the second opposing portion 933 and the second retaining portion 932 are viewed along the thickness direction of the second retaining portion 932, the second opposing portion 933 protrudes from the second retaining portion 932 toward the area outside the second retaining portion 932.

[0070] The second opposing portion 933 has a second front surface 933a and a second back surface 933b. The second front surface 933a and the second back surface 933b are two surfaces that face opposite each other in the thickness direction of the second opposing portion 933.

[0071] In the state where the second scraper body 93 is positioned with the second mounting portion 931 facing upward, the second opposing portion 933 is positioned with the second front surface 933a facing downward and the second back surface 933b facing upward.

[0072] The second opposing portion 933 is provided only at one end of the second scraper body 93 in the width direction of the second scraper body 93. As a result, the dimensions of the second opposing portion 933 in the width direction of the second scraper body 93 are smaller than the dimensions of the second retaining portion 932 in the width direction of the second scraper body 93. The multiple second screw holes 934 are provided at positions outside the range of the second opposing portion 933 in the width direction of the second scraper body 93.

[0073] As shown in Figure 3, the second scraper body 93 is attached to the fixed end of the scraper body mounting plate portion 912 by a plurality of second body mounting bolts 97. As a result, the second scraper body 93 is positioned below the switch lever 752.

[0074] The second mounting portion 931 overlaps the mounting plate portion 912 for the scraper body. The second mounting portion 931 is attached to the mounting plate portion 912 for the scraper body by screwing the second mounting bolt 97, which is passed through the second through hole 916 for the second body, into the second screw hole 934 of the second mounting portion 931.

[0075] The through-hole 916 for the second main body is an elongated hole aligned with the longitudinal direction of the mounting member 91. Therefore, the position of each second main body mounting bolt 97 within the through-hole 916 is adjustable in the longitudinal direction of the mounting member 91. The position of the second scraper body 93 relative to the mounting member 91 is adjustable in the longitudinal direction of the mounting member 91 by loosening each second main body mounting bolt 97.

[0076] The second retaining portion 932 faces the outer circumference of the governor sheave 72 in the radial direction. As shown in Figure 5, the dimensions of the second retaining portion 932 in the axial direction of the governor sheave 72 are larger than the thickness dimension of the outer circumference of the governor sheave 72 in the axial direction. The first side surface 72a and the second side surface 72b are located within the range of the second retaining portion 932 in the axial direction of the governor sheave 72.

[0077] As shown in Figure 3, the second retaining portion 932 protrudes from the fixed end of the mounting member 91 toward the outer circumference of the governor sheave 72 when viewed along the axial direction of the governor sheave 72. The governor rope 10 passes between the outer circumference of the governor sheave 72 and the second retaining portion 932.

[0078] As shown in Figure 5, the second opposing portion 933 is located at a position away from the mounting member 91 in the axial direction of the governor sheave 72. Furthermore, the second opposing portion 933 is positioned closer to the first side plate portion 712 than to the governor sheave 72 in the axial direction of the governor sheave 72. Therefore, the second opposing portion 933 is positioned on the opposite side of the governor sheave 72 from the second side plate portion 713.

[0079] As shown in Figure 3, the second opposing portion 933 is positioned with its second back surface 933b facing radially inward of the governor sheave 72 and its second front surface 933a facing radially outward of the governor sheave 72. The virtual plane including the second back surface 933b is perpendicular to the first side surface 72a. The virtual plane including the second front surface 933a is also perpendicular to the first side surface 72a. When viewed along the axial direction of the governor sheave 72, the second opposing portion 933 is positioned radially outward from the sheave reference line 722.

[0080] The second opposing portion 933 faces the first side surface 72a of the governor sheave 72. The gap between the second opposing portion 933 and the first side surface 72a is narrower than the gap between the switch lever 752 and the first side surface 72a.

[0081] As shown in Figure 3, the second opposing portion 933 protrudes from the second retaining portion 932 in the circumferential direction of the governor sheave 72, away from the switch lever 752. Of the two ends of the second opposing portion 933 in the direction of protrusion, the end closer to the second retaining portion 932 is the base end of the second opposing portion 933, and the end further away from the second retaining portion 932 is the tip end of the second opposing portion 933. The distance from the tip end of the second opposing portion 933 to the axis of the governor sheave 72 is greater than the distance from the base end of the second opposing portion 933 to the axis of the governor sheave 72. In other words, of the two ends of the second opposing portion 933 in the circumferential direction of the governor sheave 72, the distance from the end furthest from the switch lever 752 to the axis of the governor sheave 72 is greater than the distance from the end furthest from the switch lever 752 to the axis of the governor sheave 72.

[0082] The switch lever 752 is positioned between the first opposing portion 923 and the second opposing portion 933 in the circumferential direction of the governor sheave 72. The distance from the axis of the governor sheave 72 to the first opposing portion 923 is adjusted by adjusting the position of the first scraper body 92 relative to the mounting member 91. The distance from the axis of the governor sheave 72 to the second opposing portion 933 is adjusted by adjusting the position of the second scraper body 93 relative to the mounting member 91.

[0083] Figure 9 is a cross-sectional view along the line IX-IX in Figure 3. A first inclined surface 925 is formed on the surface of the first opposing portion 923 that faces the first side surface 72a. When the first opposing portion 923 is viewed along the width direction of the first scraper body 92, that is, along the axial direction of the governor sheave 72, the first inclined surface 925 is formed along the first back plate surface 923b.

[0084] The first inclined surface 925 is inclined with respect to the first side surface 72a in a direction that approaches the first side surface 72a from the first back surface 923b toward the first front surface 923a. As a result, the gap between the first inclined surface 925 and the first side surface 72a widens toward the radially inward side of the governor sheave 72. At any position on the first inclined surface 925, the gap between the first inclined surface 925 and the first side surface 72a is smaller than the gap between the switch lever 752 and the first side surface 72a.

[0085] Figure 10 is a cross-sectional view along line XX in Figure 3. A second inclined surface 935 is formed on the surface of the second opposing portion 933 that faces the first side surface 72a. When the second opposing portion 933 is viewed along the width direction of the second scraper body 93, i.e., along the axial direction of the governor sheave 72, the second inclined surface 935 is formed along the second back plate surface 933b.

[0086] The second inclined surface 935 is inclined with respect to the first side surface 72a in a direction that approaches the first side surface 72a from the second back surface 933b toward the second front surface 933a. As a result, the gap between the second inclined surface 935 and the first side surface 72a widens toward the radially inward side of the governor sheave 72. At any position on the second inclined surface 935, the gap between the second inclined surface 935 and the first side surface 72a is smaller than the gap between the switch lever 752 and the first side surface 72a.

[0087] Next, the operation of the governor 7 will be explained. When the cage 2 moves downward, the governor sheave 72 rotates in the first direction A. When the cage 2 moves upward, the governor sheave 72 rotates in the second direction B. Each flyweight 73 is subjected to a centrifugal force corresponding to the rotational speed of the governor sheave 72. As the moving speed of the cage 2 increases, the magnitude of the centrifugal force acting on each flyweight 73 increases, causing each flyweight 73 to be displaced relative to the governor sheave 72 against the elastic restoring force of the balance spring 74.

[0088] If the movement speed of the cage 2 increases due to some abnormality and the rotation speed of the governor sheave 72 reaches the set excessive speed, the switch lever 752 is operated by the protruding bolt 731 of one of the flyweights 73. When the switch lever 752 is operated, the power supply to the hoisting machine 4 is cut off and the brake of the hoisting machine 4 is activated.

[0089] If the movement speed of the cage 2 increases even after the power supply to the hoisting machine 4 is cut off, and the rotation speed of the governor sheave 72 increases further, each flyweight 73 will be further displaced relative to the governor sheave 72. In this case, when the rotation speed of the governor sheave 72 reaches the emergency stop excessive speed, each flyweight 73 will be displaced relative to the governor sheave 72 to the gripping position. This causes the gripping mechanism to perform a gripping operation.

[0090] When the gripping mechanism performs its gripping operation, the movement of the governor rope 10 is stopped. At this time, the movement of the car 2 continues, so the control unit 61 is operated by the governor rope 10. As a result, the emergency stop device 6 performs an emergency action, and the movement of the car 2 stops.

[0091] In the governor 7, oil seeping from the governor rope 10, grease injected into the governor 7, etc., may adhere to the governor sheave 72 as deposits and solidify. The thickness of the solidified deposits on the first side surface 72a of the governor sheave 72 increases as the deposits accumulate on the first side surface 72a.

[0092] When the governor sheave 72 rotates in the first direction A due to the downward movement of the cage 2, the deposits accumulated on the first side surface 72a pass the position of the switch lever 752. At this time, if the thickness of the deposits is greater than the gap between the switch lever 752 and the first side surface 72a, the switch lever 752 will be operated by the deposits. This may cause the switch lever 752 to be misoperated when the governor sheave 72 rotates in the first direction A.

[0093] In this embodiment, when the governor sheave 72 rotates in the first direction A, the deposits accumulated on the first side surface 72a pass the position of the first opposing part 923 before passing the position of the switch lever 752. At this time, if the thickness of the deposits is greater than the gap between the first opposing part 923 and the first side surface 72a, the deposits are scraped away by the first opposing part 923. This prevents the switch lever 752 from being operated by the deposits when the governor sheave 72 rotates in the first direction A.

[0094] When the governor sheave 72 rotates in the first direction A, the deposit moves in the circumferential direction of the governor sheave 72 from the position of the tip of the first opposing part 923 toward the position of the base of the first opposing part 923, and the deposit is scraped by the first opposing part 923. Consequently, the position of the portion of the deposit being scraped by the first opposing part 923 continuously shifts radially inward of the governor sheave 72. As a result, the deposit is scraped by the first opposing part 923 within the range of the first opposing part 923 in the radial direction of the governor sheave 72.

[0095] The deposits accumulated on the first side surface 72a are scraped off by the edge of the first opposing part 923 that faces the first side surface 72a. The debris scraped off by the first opposing part 923 is guided to the first surface 923a by the rotation of the governor sheave 72 in the first direction A. The debris guided to the first surface 923a accumulates on the first surface 923a from the tip of the first opposing part 923 to the base of the first opposing part 923.

[0096] In the first opposing portion 923, the angle between the first front surface 923a and the first inclined surface 925 is acute. This makes it easier for deposits accumulated on the first side surface 72a to be scraped off by the first opposing portion 923. In addition, the gap between the first inclined surface 925 and the first side surface 72a widens radially inward towards the governor sheave 72. This makes it difficult for debris scraped off by the first opposing portion 923 to be guided to the first back surface 923b.

[0097] Furthermore, when the governor sheave 72 rotates in the second direction B due to the upward movement of the cage 2, there is a risk that the switch lever 752 may be misoperated due to adhering debris, similar to when the governor sheave 72 rotates in the first direction A.

[0098] In this embodiment, when the governor sheave 72 rotates in the second direction B, the deposits accumulated on the first side surface 72a pass the position of the second opposing part 933 before passing the position of the switch lever 752. At this time, if the thickness of the deposits is greater than the gap between the second opposing part 933 and the first side surface 72a, the deposits are scraped away by the second opposing part 933. This prevents the switch lever 752 from being operated by the deposits when the governor sheave 72 rotates in the second direction B.

[0099] When the governor sheave 72 rotates in the second direction B, the deposit moves in the circumferential direction of the governor sheave 72 from the position of the tip of the second opposing part 933 to the position of the base of the second opposing part 933, and the deposit is scraped by the second opposing part 933. Consequently, the position of the portion of the deposit being scraped by the second opposing part 933 continuously shifts radially inward of the governor sheave 72. As a result, the deposit is scraped by the second opposing part 933 within the range of the second opposing part 933 in the radial direction of the governor sheave 72.

[0100] The deposits accumulated on the first side surface 72a are scraped off by the edge of the second opposing part 933 that faces the first side surface 72a. The debris scraped off by the second opposing part 933 is guided to the second surface 933a by the rotation of the governor sheave 72 in the second direction B. The debris guided to the second surface 933a accumulates on the second surface 933a from the tip of the second opposing part 933 to the base of the second opposing part 933.

[0101] In the second opposing section 933, the angle between the second front surface 933a and the second inclined surface 935 is acute. This makes it easier for deposits accumulated on the first side surface 72a to be scraped off by the second opposing section 933. In addition, the gap between the second inclined surface 935 and the first side surface 72a widens radially inward towards the governor sheave 72. This makes it less likely for the debris scraped off by the second opposing section 933 to be guided to the second back surface 933b.

[0102] In this type of elevator governor 7, the switch lever 752 is positioned between the first opposing part 923 and the second opposing part 933 in the circumferential direction of the governor sheave 72. Therefore, when the governor sheave 72 rotates in the first direction A, any deposits adhering to the first side surface 72a of the governor sheave 72 can be removed by the first opposing part 923 before they pass the position of the switch lever 752. Similarly, when the governor sheave 72 rotates in the second direction B, any deposits adhering to the first side surface 72a of the governor sheave 72 can be removed by the second opposing part 933 before they pass the position of the switch lever 752. As a result, regardless of whether the governor sheave 72 rotates in the first direction A or the second direction B, any deposits can be removed from the first side surface 72a before they reach the switch lever 752. Consequently, erroneous operation of the switch lever 752 can be more reliably suppressed.

[0103] Furthermore, the first anti-detachment portion 922 faces the outer circumference of the governor sheave 72 in the radial direction. In addition, the first side surface 72a and the second side surface 72b of the governor sheave 72 are located within the range of the first anti-detachment portion 922 in the axial direction of the governor sheave 72. Therefore, for example, in the event of an earthquake, the first anti-detachment portion 922 can prevent the governor rope 10, which is wrapped around the outer circumference of the governor sheave 72, from coming off the governor sheave 72. This eliminates the need to separately provide a dedicated anti-detachment device on the governor 7 to prevent the governor rope 10 from coming off the governor sheave 72. Consequently, the number of parts in the governor 7 can be reduced.

[0104] Furthermore, the first opposing portion 923 is provided on the first anti-detachment portion 922. As a result, the outer circumference of the governor sheave 72 can be covered by both the first anti-detachment portion 922 and the first opposing portion 923. This further ensures that the governor rope 10 does not detach from the governor sheave 72.

[0105] Furthermore, the first opposing portion 923 is positioned with its first back plate surface 923b facing radially inward towards the governor sheave 72. In addition, the distance from the tip of the first opposing portion 923 furthest from the switch lever 752 to the axis of the governor sheave 72 is greater than the distance from the base end closer to the switch lever 752 to the axis of the governor sheave 72. As a result, debris from attached materials can accumulate on the first front plate surface 923a of the first opposing portion 923 from the tip to the base end of the first opposing portion 923 in the circumferential direction of the governor sheave 72. This expands the space for accumulating debris from attached materials, making it more reliable to prevent debris removed from the first side surface 72a from re-adhering to the first side surface 72a. It also expands the range over which the first opposing portion 923 scrapes off the attached materials. This makes it easier for the first opposing portion 923 to scrape off the attached materials.

[0106] Furthermore, the first opposing portion 923 has a first inclined surface 925 that is inclined with respect to the first side surface 72a. In addition, the gap between the first inclined surface 925 and the first side surface 72a widens radially inward of the governor sheave 72. As a result, when the governor sheave 72 rotates in the first direction A, debris from the attached material is less likely to accumulate on the first inclined surface 925 and the first back plate surface 923b, and debris from the attached material is more easily guided to the first front plate surface 923a. This allows for more reliable accumulation of debris from the attached material on the first front plate surface 923a. It also allows for more reliable suppression of debris from the attached material reattaching from the first opposing portion 923 to the first side surface 72a when the governor sheave 72 rotates in the second direction B.

[0107] Furthermore, the second anti-detachment portion 932 faces the outer circumference of the governor sheave 72 in the radial direction. In addition, the first side surface 72a and the second side surface 72b of the governor sheave 72 are located within the range of the second anti-detachment portion 932 in the axial direction of the governor sheave 72. Therefore, the governor rope 10 wrapped around the outer circumference of the governor sheave 72 can be prevented from coming off the governor sheave 72 by the second anti-detachment portion 932. This makes it possible to reduce the number of parts in the governor 7.

[0108] Furthermore, the second opposing portion 933 is provided on the second anti-detachment portion 932. As a result, the outer circumference of the governor sheave 72 can be covered by both the second anti-detachment portion 932 and the second opposing portion 933. This further ensures that the governor rope 10 does not detach from the governor sheave 72.

[0109] Furthermore, the second opposing portion 933 is positioned with its second back plate surface 933b facing radially inward towards the governor sheave 72. In addition, the distance from the tip of the second opposing portion 933 furthest from the switch lever 752 to the axis of the governor sheave 72 is greater than the distance from the base end closer to the switch lever 752 to the axis of the governor sheave 72. As a result, debris from attached materials can accumulate on the second front plate surface 933a of the second opposing portion 933 from the tip to the base end of the second opposing portion 933 in the circumferential direction of the governor sheave 72. This expands the space for accumulating debris from attached materials, making it more reliable to prevent debris removed from the first side surface 72a from re-adhering to the first side surface 72a. It also expands the range over which the second opposing portion 933 scrapes off the attached materials. This makes it easier for the second opposing portion 933 to scrape off the attached materials.

[0110] Furthermore, the second opposing portion 933 has a second inclined surface 935 that is inclined with respect to the first side surface 72a. In addition, the gap between the second inclined surface 935 and the first side surface 72a widens radially inward of the governor sheave 72. As a result, when the governor sheave 72 rotates in the second direction B, debris from the attached material is less likely to accumulate on the second inclined surface 935 and the second back plate surface 933b, and debris from the attached material is more easily guided to the second front plate surface 933a. This allows for more reliable accumulation of debris from the attached material on the second front plate surface 933a. It also allows for more reliable suppression of debris from the attached material reattaching from the second opposing portion 933 to the first side surface 72a when the governor sheave 72 rotates in the first direction A.

[0111] In the above embodiment, the first opposing portion 923 and the second opposing portion 933 are plate-shaped. However, the invention is not limited to this. For example, the first opposing portion 923 may be a rod-shaped portion with a rectangular cross-section along the first side surface 72a. Similarly, the second opposing portion 933 may be a rod-shaped portion with a rectangular cross-section along the first side surface 72a. In this case as well, the first opposing portion 923 and the second opposing portion 933 can remove the attached material from the first side surface 72a.

[0112] Furthermore, in the above embodiment, the first retaining portion 922 and the second retaining portion 932 face the outer circumference of the governor sheave 72. However, the first retaining portion 922 may be made not to face the outer circumference of the governor sheave 72. Similarly, the second retaining portion 932 may be made not to face the outer circumference of the governor sheave 72. For example, by attaching the mounting member 91 to the first side plate portion 712 instead of the second side plate portion 713, the first retaining portion 922 and the second retaining portion 932 can be made not to face the outer circumference of the governor sheave 72. Even in this way, malfunction of the switch lever 752 can be suppressed by the first opposing portion 923 and the second opposing portion 933.

[0113] Furthermore, in the above embodiment, a first inclined surface 925 is formed on the first opposing portion 923. However, it is not necessary to form a first inclined surface 925 on the first opposing portion 923. For example, in the first opposing portion 923, the surface facing the first side surface 72a may be a surface parallel to the first side surface 72a. Even in this case, the first opposing portion 923 can remove the attached material from the first side surface 72a.

[0114] Furthermore, in the above embodiment, a second inclined surface 935 is formed on the second opposing portion 933. However, it is not necessary to form a second inclined surface 935 on the second opposing portion 933. For example, in the second opposing portion 933, the surface facing the first side surface 72a may be a surface parallel to the first side surface 72a. Even in this case, the second opposing portion 933 can remove the attached material from the first side surface 72a.

[0115] The configurations shown in the embodiments described above are merely examples of the content of this disclosure. The embodiments can be combined with other known technologies. Some parts of the configurations of the embodiments can be omitted or modified without departing from the gist of this disclosure.

[0116] Examples of aspects that may be included in this disclosure are listed below as an addendum. (Note 1) A governor sheave around which the governor rope, which moves along with the movement of the cage, is wound, A flyweight that is displaced relative to the governor sheave in accordance with the rotational speed of the governor sheave, A switch having a switch lever, the switch lever being operated by the flyweight when the rotational speed of the governor sheave reaches a set excessive speed, A scraper facing the governor sheave and Equipped with, The switch lever is located opposite the first side of the governor sheave, of the first and second side surfaces. The aforementioned scraper comprises a first scraper body and a second scraper body. The first scraper body has a first opposing portion that faces the first side surface, The second scraper body has a second opposing portion that faces the first side surface, The switch lever is positioned between the first opposing portion and the second opposing portion in the circumferential direction of the governor sheave. The gap between the first side surface and the first opposing portion is narrower than the gap between the first side surface and the switch lever. An elevator governor in which the gap between the first side surface and the second opposing portion is narrower than the gap between the first side surface and the switch lever. (Note 2) The first scraper body has a first anti-detachment portion that faces the outer circumference of the governor sheave in the radial direction of the governor sheave, The first and second sides are located within the range of the first anti-detachment portion in the axial direction of the governor sheave. The first opposing portion is the elevator governor described in Appendix 1, which is provided on the first anti-detachment portion. (Note 3) The first opposing portion is a plate-like portion on which a first front surface and a first back surface are formed. The first opposing portion is positioned with its first back plate surface facing radially inward towards the governor sheave. The governor of an elevator according to Appendix 1 or Appendix 2, wherein the distance from the end of the first opposing portion of the governor sheave in the circumferential direction, which is furthest from the switch lever, to the axis of the governor sheave is greater than the distance from the end of the first opposing portion, which is furthest from the switch lever, to the axis of the governor sheave. (Note 4) The first opposing portion has a first inclined surface that is inclined with respect to the first side surface. The gap between the first inclined surface and the first side surface widens radially inward toward the governor sheave, the governor of an elevator according to any one of the appendices 1 to 3. [Explanation of Symbols]

[0117] 2 basket, 7 governor, 9 scraper, 72 governor sheave, 72a first side, 72b second side, 73 flyweight, 75 switch, 92 first scraper body, 93 second scraper body, 752 switch lever, 922 first retaining part, 923 first opposing part, 923a first front surface, 923b first back surface, 925 first inclined surface, 932 second retaining part, 933 second opposing part, 933a second front surface, 933b second back surface, 935 second inclined surface.

Claims

1. A governor sheave around which the governor rope, which moves along with the movement of the cage, is wound, A flyweight that is displaced relative to the governor sheave in accordance with the rotational speed of the governor sheave, A switch having a switch lever, the switch lever being operated by the flyweight when the rotational speed of the governor sheave reaches a set excessive speed, A scraper facing the governor sheave and Equipped with, The switch lever is located opposite the first side of the governor sheave, The aforementioned scraper comprises a first scraper body and a second scraper body. The first scraper body has a first opposing portion that faces the first side surface, The second scraper body has a second opposing portion that faces the first side surface, The switch lever is positioned between the first opposing portion and the second opposing portion in the circumferential direction of the governor sheave. The gap between the first side surface and the first opposing portion is narrower than the gap between the first side surface and the switch lever. An elevator governor in which the gap between the first side surface and the second opposing portion is narrower than the gap between the first side surface and the switch lever.

2. The first scraper body is positioned radially opposite the outer circumference of the governor sheave and has a first anti-detachment portion that prevents the governor rope from coming off the governor sheave. The first and second sides are located within the range of the first anti-detachment portion in the axial direction of the governor sheave. The elevator governor according to claim 1, wherein the first opposing portion is provided on the first anti-detachment portion.

3. The first opposing portion is a plate-like portion on which a first front surface and a first back surface are formed. The first opposing portion is positioned with its first back plate surface facing radially inward towards the governor sheave. The elevator governor according to claim 1 or claim 2, wherein the distance from the end of the first opposing portion of the governor sheave in the circumferential direction, which is furthest from the switch lever, to the axis of the governor sheave is greater than the distance from the end of the first opposing portion, which is furthest from the switch lever, to the axis of the governor sheave.

4. The first opposing portion has a first inclined surface that is inclined with respect to the first side surface. The elevator governor according to claim 1 or claim 2, wherein the gap between the first inclined surface and the first side surface widens radially inward toward the governor sheave.

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