Foreign matter removal device of elevator speed governor

Abstract

To provide a foreign matter removal device of an elevator speed governor that can suppress a foreign matter removed from a speed governor sheave from re-adhering to the speed governor sheave.SOLUTION: A foreign matter removal device 606 of an elevator speed governor is provided with an outer peripheral surface scraper 619 that removes a foreign matter 11 from an outer peripheral surface lower portion 622 that is a portion on an outer peripheral surface of a speed governor sheave 602, which is lower than a speed governor shaft 603, The outer peripheral surface scraper 619 has an outer peripheral surface blade part 625 having a tip part opposing to the outer peripheral surface lower portion 622. The outer peripheral surface blade part 625 is arranged obliquely with respect to a straight line along the speed governor shaft 603, when viewed from above.SELECTED DRAWING: Figure 26

Description

[Technical field]

[0001] The present disclosure relates to a foreign object removal device for an elevator governor. [Background technology]

[0002] Conventionally, elevator governors equipped with a foreign object removal device that removes foreign objects from the outer circumferential surface of a governor sheave are known. The foreign object removal device has a facing portion that faces the outer circumferential surface of the governor sheave. Foreign objects attached to the outer circumferential surface of the governor sheave are removed from the governor sheave by the facing portion (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-160921 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the elevator governor foreign object removal device described in Patent Document 1, the portion where foreign objects are removed from the outer circumferential surface of the governor sheave at the facing portion is a horizontal surface. As a result, the foreign objects removed from the outer circumferential surface of the governor sheave accumulate on the horizontal surface of the facing portion. As the foreign objects accumulated on the horizontal surface of the facing portion grow larger, there is a problem in that the foreign objects accumulated on the horizontal surface of the facing portion re-adhere to the governor sheave.

[0005] The present disclosure has been made to solve the problems described above, and has an object to provide a foreign object removal device for an elevator governor that can prevent foreign objects removed from the governor sheave from re-adhering to the governor sheave. [Means for solving the problem]

[0006] The elevator governor foreign object removal device according to the present disclosure includes an outer peripheral surface scraper that removes foreign objects from a lower portion of the outer peripheral surface of the governor sheave that is below the governor shaft, and the outer peripheral surface scraper has an outer peripheral surface blade portion whose tip portion faces the lower portion of the outer peripheral surface from below, and the outer peripheral surface blade portion is arranged at an angle with respect to a straight line along the governor shaft when viewed from above. Effect of the Invention

[0007] According to the elevator governor foreign object removal device according to the present disclosure, it is possible to prevent foreign objects removed from the governor sheave from re-adhering to the governor sheave. [Brief description of the drawings]

[0008] [Figure 1] 1 is a configuration diagram showing an elevator equipped with an elevator governor having a foreign object removal device for an elevator governor according to a first embodiment. [Diagram 2] FIG. 2 is a front view showing a part of the governor body and the governor rope of FIG. [Diagram 3] FIG. 3 is a left side view showing a part of the governor body and the governor rope of FIG. 2. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5] FIG. 4 is a front view showing the outer peripheral surface scraper of FIG. 3. [Figure 6] FIG. 6 is a left side view showing the outer peripheral surface scraper of FIG. 5. [Figure 7] FIG. 6 is a plan view showing the outer peripheral surface scraper of FIG. 5. [Figure 8] FIG. 3 is a front view of the side scraper of FIG. 2. [Figure 9] FIG. 9 is a left side view of the side scraper of FIG. 8. [Figure 10] FIG. 9 is a plan view showing the side scraper of FIG. 8. [Figure 11] FIG. 2 is an explanatory diagram showing the mounting positions and mounting angles of the outer peripheral surface scraper and the side scraper relative to the governor sheave when viewed along the governor shaft. [Figure 12] 1 is an explanatory diagram showing the mounting positions and mounting angles of an outer peripheral surface scraper and a side scraper relative to a governor sheave when viewed from above. FIG. [Figure 13] FIG. 2 is a front view showing an elevator governor of a first comparative example. [Figure 14] FIG. 14 is a left side view showing the elevator governor of the first comparative example shown in FIG. 13. [Figure 15] FIG. 14 is a front view showing a state in which the governor weight of FIG. 13 is in contact with the overspeed detection switch. [Figure 16] FIG. 14 is a front view showing a state in which a foreign object is attached to the governor sheave of FIG. 13. [Figure 17] FIG. 17 is a left side view showing the elevator governor of the first comparative example in FIG. 16. [Figure 18] 18 is a front view showing a state in which the foreign object in FIG. 17 comes into contact with the overspeed detection switch. FIG. [Figure 19] FIG. 11 is a front view showing a state in which a foreign object has re-adhered to the governor sheave of the elevator governor of the second comparative example. [Figure 20] 20 is a plan view showing how foreign matter is removed from the outer circumferential surface and outer circumferential portion of the side surface of a governor sheave by the foreign matter removal device of FIG. 19. [Figure 21] 20 is a front view showing how foreign matter is removed from the outer circumferential surface and the outer circumferential portion of the side surface of a governor sheave by the foreign matter removal device of FIG. 19. [Figure 22] 21 is a diagram showing a state in which foreign matter accumulated in the opposing portion of FIG. 20 has increased. [Figure 23] 21 is a diagram showing a state in which foreign matter accumulated in the opposing portion of FIG. 20 has increased. [Figure 24] 6 is a front view showing how foreign matter is removed from the outer circumferential surface of the governor sheave by the outer circumferential surface scraper of FIG. 5. FIG. [Diagram 25] 25 is a cross-sectional view taken along line XXV-XXV in FIG. 24. [Figure 26] 6 is a plan view showing how foreign matter is removed from the outer circumferential surface of the governor sheave by the outer circumferential surface scraper of FIG. 5. FIG. [Figure 27]FIG. 9 is a front view showing how foreign matter is removed from the side surface of the governor sheave by the side scraper of FIG. 8. [Figure 28] 28 is a cross-sectional view taken along line XXVIII-XXVIII in FIG. 27. [Figure 29] FIG. 9 is a plan view showing how foreign matter is removed from the side surface of the governor sheave by the side scraper of FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Embodiment 1 1 is a configuration diagram showing an elevator equipped with an elevator governor having a foreign object removal device for an elevator governor according to embodiment 1. The elevator includes a car 1, a counterweight 2, a main rope 3, a hoist 4, and an elevator governor 5.

[0010] One longitudinal end of the main rope 3 is connected to the car 1. The other longitudinal end of the main rope 3 is connected to the counterweight 2. An intermediate portion of the main rope 3 in the longitudinal direction is wound around a hoist 4 from above.

[0011] The main ropes 3 move as the hoist 4 is driven. As the main ropes 3 move, the car 1 and the counterweight 2 move in the hoistway in opposite directions.

[0012] The elevator governor 5 includes a governor body 6, a tension wheel 7, a governor rope 8, and a connecting member 9.

[0013] The governor body 6 is provided in the machine room. The governor body 6 may be provided in the upper part of the elevator shaft. The governor body 6 includes a governor frame 601 and a governor sheave 602.

[0014] A governor sheave 602 is rotatably supported by the governor frame 601. A governor rope 8 is wound around the governor sheave 602 from above. The governor rope 8 moves, causing the governor sheave 602 to rotate.

[0015] The tension wheel 7 includes a tension wheel frame 701, a tension wheel sheave 702, and a tension wheel weight 703.

[0016] A tensioner sheave 702 is rotatably supported on the tensioner frame 701. A tensioner weight 703 is attached to the tensioner frame 701. A governor rope 8 is wound around the tensioner sheave 702 from below.

[0017] The tension sheave 702 is suspended from the governor rope 8. As a result of the tension sheave 702 being suspended from the governor rope 8, a preset tension acts on the governor rope 8. As the governor rope 8 moves, the tension sheave 702 rotates.

[0018] The connecting members 9 are provided at both longitudinal ends of the governor rope 8. The connecting members 9 are connected to the car 1. The governor rope 8 is connected to the car 1 by connecting the connecting members 9 to the car 1. By connecting the governor rope 8 to the car 1, the governor rope 8 moves in conjunction with the movement of the car 1.

[0019] Fig. 2 is a front view showing a part of the governor body 6 and the governor rope 8 of Fig. 1. Fig. 3 is a left side view showing a part of the governor body 6 and the governor rope 8 of Fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 2. The governor body 6 includes a governor shaft 603, a pair of governor weights 604, an overspeed detection switch 605, and a foreign object removal device 606.

[0020] The governor frame 601 has a base 607 , a first side plate 608 , a second side plate 609 , and a plurality of fixing anchor bolts 610 .

[0021] The base 607 is formed in a flat plate shape. The base 607 is laid on the floor 10 of the machine room. The base 607 is fixed to the floor 10 of the machine room via a plurality of fixing anchor bolts 610.

[0022] Each of the first side plate 608 and the second side plate 609 is formed in a flat plate shape. The first side plate 608 and the second side plate 609 are arranged parallel to each other. Therefore, the first side plate 608 and the second side plate 609 are arranged facing each other in the plate thickness direction. Each of the first side plate 608 and the second side plate 609 is erected on the upper surface of the base 607. The base 607, the first side plate 608, and the second side plate 609 are formed integrally with each other. Therefore, each of the first side plate 608 and the second side plate 609 is fixed to the base 607.

[0023] The governor shaft 603 is rotatably supported by the governor frame 601. Specifically, the governor shaft 603 is provided across a first side plate 608 and a second side plate 609, and is rotatably supported by each of the first side plate 608 and the second side plate 609.

[0024] The governor sheave 602 is fixed to a governor shaft 603. The governor sheave 602 is disposed between a first side plate 608 and a second side plate 609. The governor sheave 602 is rotatable relative to the governor frame 601 around the governor shaft 603.

[0025] The governor sheave 602 is formed in a disk shape. A rope groove 611 extending in the circumferential direction of the governor sheave 602 is formed on the outer circumferential surface of the governor sheave 602.

[0026] The governor rope 8 is wound around the governor sheave 602. Specifically, the governor rope 8 is fitted into a rope groove 611 of the governor sheave 602.

[0027] A tension is applied to the governor rope 8 by the tension wheel 7. When tension is applied to the governor rope 8, a frictional force is generated between the governor rope 8 and the inner circumferential surface of the rope groove 611 of the governor sheave 602. The frictional force generated between the governor rope 8 and the inner circumferential surface of the rope groove 611 of the governor sheave 602 causes the governor sheave 602 to rotate in conjunction with the movement of the governor rope 8.

[0028] Each of the pair of governor weights 604 is provided on the governor sheave 602. Specifically, each of the pair of governor weights 604 is provided on one of a pair of side surfaces of the governor sheave 602 facing the axial direction of the governor shaft 603.

[0029] Each of the pair of governor weights 604 has a weight shaft 612 , a weight body 613 , and an operating piece 614 .

[0030] The weight shaft 612 is provided on a side surface of the governor sheave 602. When viewed along the governor shaft 603, the weight shaft 612 is disposed between the governor shaft 603 and the outer peripheral surface of the governor sheave 602. The weight shaft 612 is disposed so as to extend perpendicularly to the side surface of the governor sheave 602. In other words, the weight shaft 612 is disposed parallel to the governor shaft 603.

[0031] The weight body 613 is formed in an elongated shape. The weight body 613 is disposed along the side surface of the governor sheave 602. One longitudinal end portion 615 of the weight body 613 is attached to the weight shaft 612. The weight body 613 is rotatable about the weight shaft 612.

[0032] A spring (not shown) is attached to the other longitudinal end 616 of the weight body 613. The spring is provided across the weight body 613 and the governor sheave 602. When the governor sheave 602 rotates, centrifugal force acts on the weight body 613. The centrifugal force acting on the weight body 613 causes the other longitudinal end 616 of the weight body 613 to move radially outward of the governor sheave 602 against the elastic force of the spring. Therefore, the governor weight 604 moves radially of the governor sheave 602 according to the rotation speed of the governor sheave 602.

[0033] The operating piece 614 is provided at the other longitudinal end 616 of the weight body 613. Therefore, the operating piece 614 moves in the radial direction of the governor sheave 602 according to the rotation speed of the governor sheave 602.

[0034] The overspeed detection switch 605 is provided on the governor frame 601. Specifically, the overspeed detection switch 605 is provided on the second side plate 609. The overspeed detection switch 605 has a switch box 617 and an operating piece 618.

[0035] The switch box 617 is provided on the second side plate 609. The operating piece 618 is provided on the switch box 617.

[0036] The overspeed detection switch 605 is disposed at a preset position. The preset position at which the overspeed detection switch 605 is disposed is a position where the operating piece 614 comes into contact with the operating piece 618 when the rotation speed of the governor sheave 602 reaches a preset rotation speed. The preset rotation speed of the governor sheave 602 is the rotation speed of the governor sheave 602 when the speed of the car 1 reaches a preset speed. Therefore, when the speed of the car 1 reaches the preset speed, the operating piece 614 comes into contact with the operating piece 618.

[0037] The switch box 617 detects that the operating piece 614 has come into contact with the operating piece 618. When the switch box 617 detects that the operating piece 614 has come into contact with the operating piece 618, the overspeed detection switch 605 detects that the rotational speed of the governor sheave 602 has reached a preset rotational speed. In other words, when the switch box 617 detects that the operating piece 614 has come into contact with the operating piece 618, the overspeed detection switch 605 detects that the speed of the car 1 has reached a preset speed.

[0038] The foreign matter removal device 606 includes a pair of outer peripheral surface scrapers 619 , a pair of side surface scrapers 620 , and a pair of oil receiving containers 621 .

[0039] The direction along the radial direction of the governor sheave 602 and along the floor 10 of the machine room is defined as the width direction D of the foreign object removal device 606. When viewed along the governor shaft 603, the pair of outer circumferential surface scrapers 619 are arranged spaced apart from each other in the width direction D, centered on a straight line that passes through the center of the governor shaft 603 and extends in the height direction.

[0040] When viewed along the governor shaft 603, the pair of side scrapers 620 are arranged spaced apart from each other in the width direction D, centered on a straight line that passes through the center of the governor shaft 603 and extends in the height direction.

[0041] One of the pair of oil receiving containers 621 is provided below one of the pair of outer circumferential surface scrapers 619 and below one of the pair of side surface scrapers 620. Foreign matter that falls from one of the outer circumferential surface scrapers 619 and foreign matter that falls from one of the side surface scrapers 620 are contained in one of the oil receiving containers 621.

[0042] The other oil receiving container 621 of the pair of oil receiving containers 621 is provided below the other outer peripheral surface scraper 619 of the pair of outer peripheral surface scrapers 619 and below the other side surface scraper 620 of the pair of side surface scrapers 620. Foreign matter that falls from the other outer peripheral surface scraper 619 and foreign matter that falls from the other side surface scraper 620 are contained in the other oil receiving container 621.

[0043] A portion of the outer circumferential surface of the governor sheave 602 that is below the governor shaft 603 is referred to as an outer circumferential surface lower portion 622. Each of the pair of outer circumferential surface scrapers 619 removes foreign matter from the outer circumferential surface lower portion 622.

[0044] An outer peripheral portion of the side surface of the governor sheave 602 that is below the governor shaft 603 is referred to as a side peripheral lower portion 623. Each of the pair of side surface scrapers 620 removes foreign matter from the side peripheral lower portion 623.

[0045] The pair of outer circumferential surface scrapers 619 have the same configuration. Therefore, the configuration of one of the pair of outer circumferential surface scrapers 619 will be described below.

[0046] Fig. 5 is a front view showing the outer circumferential surface scraper 619 of Fig. 3. Fig. 6 is a left side view showing the outer circumferential surface scraper 619 of Fig. 5. Fig. 7 is a plan view showing the outer circumferential surface scraper 619 of Fig. 5. The outer circumferential surface scraper 619 has an outer circumferential surface base portion 624, an outer circumferential surface blade portion 625, a partition 626, and an outer circumferential surface foreign object intrusion groove portion 627.

[0047] The outer circumferential surface base 624 is provided across the first side plate 608 and the second side plate 609. The outer circumferential surface base 624 is fixed to the first side plate 608 and the second side plate 609 via a plurality of screws 628.

[0048] The outer peripheral surface blade portion 625 is formed integrally with the outer peripheral surface base portion 624. The tip of the outer peripheral surface blade portion 625 is formed at an acute angle. The tip of the outer peripheral surface blade portion 625 faces the outer peripheral surface lower portion 622 from below. The tip of the outer peripheral surface blade portion 625 faces the entire outer peripheral surface of the governor sheave 602 in the direction along the governor shaft 603. The portion of the outer peripheral surface lower portion 622 that the tip of the outer peripheral surface blade portion 625 faces is the outer peripheral surface foreign matter removal target portion 629. Foreign matter adhering to the outer peripheral surface foreign matter removal target portion 629 is scraped off by the outer peripheral surface blade portion 625.

[0049] The outer peripheral surface blade portion 625 has a rope groove insertion portion 630 that is inserted into a rope groove 611 formed on the outer peripheral surface of the governor sheave 602. Foreign matter adhering to the inner peripheral surface of the rope groove 611 is scraped off by the rope groove insertion portion 630.

[0050] Partition 626 is provided on the operating piece 618 side of overspeed detection switch 605 relative to outer circumferential surface blade portion 625 in the direction along governor shaft 603. Partition 626 is formed integrally with outer circumferential surface base portion 624. Partition 626 prevents foreign matter removed from outer circumferential surface lower portion 622 by outer circumferential surface blade portion 625 from moving toward operating piece 618 of overspeed detection switch 605.

[0051] The outer peripheral surface foreign object entrance groove 627 is provided on the opposite side of the outer peripheral surface blade portion 625 to the operating piece 618 of the overspeed detection switch 605 in the direction along the governor shaft 603. The outer peripheral surface foreign object entrance groove 627 is formed integrally with the outer peripheral surface base portion 624. When viewed from above, the outer peripheral surface foreign object entrance groove 627 is disposed closer to the governor shaft 603 than the outer peripheral surface blade portion 625. As a result, foreign objects removed from the outer peripheral surface lower portion 622 by the outer peripheral surface blade portion 625 enter the outer peripheral surface foreign object entrance groove 627. By the foreign objects removed from the outer peripheral surface lower portion 622 entering the outer peripheral surface foreign object entrance groove 627, the foreign objects removed from the outer peripheral surface lower portion 622 are prevented from accumulating on the outer peripheral surface blade portion 625.

[0052] The pair of side scrapers 620 have the same configuration, so one of the pair of side scrapers 620 will be described below.

[0053] Fig. 8 is a front view showing the side scraper 620 of Fig. 2. Fig. 9 is a left side view showing the side scraper 620 of Fig. 8. Fig. 10 is a plan view showing the side scraper 620 of Fig. 8. The side scraper 620 has a side base portion 631, a side blade portion 632, a visor portion 633, and a side foreign object entry groove portion 634.

[0054] The side surface base 631 is provided on the first side plate 608. The side surface base 631 is fixed to the first side plate 608 via a plurality of screws 635.

[0055] The side blade 632 is formed integrally with the side base 631. The tip of the side blade 632 is formed at an acute angle. The tip of the side blade 632 faces the side outer periphery lower portion 623. The tip of the side blade 632 faces the entire area of ​​the side outer periphery lower portion 623 in the height direction. The portion of the side outer periphery lower portion 623 that the tip of the side blade 632 faces is the side foreign matter removal target portion 636. Foreign matter adhering to the side foreign matter removal target portion 636 is scraped off by the side blade 632.

[0056] When viewed from above, the side blade portion 632 is disposed at an angle with respect to the side surface of the governor sheave 602 so as to approach the governor shaft 603 with increasing distance from the side outer circumferential lower portion 623 .

[0057] The overhanging portion 633 is formed integrally with the side surface base portion 631. The overhanging portion 633 is provided above the side surface blade portion 632. The overhanging portion 633 prevents foreign matter removed from the side surface outer circumferential lower portion 623 by the side surface blade portion 632 from moving upward.

[0058] The side foreign object entrance groove 634 is formed integrally with the side base 631. When viewed from above, the side foreign object entrance groove 634 is disposed closer to the governor shaft 603 than the side blade portion 632. As a result, foreign objects removed from the side outer periphery lower portion 623 by the side blade portion 632 enter the side foreign object entrance groove 634. By the foreign objects removed from the side outer periphery lower portion 623 entering the side foreign object entrance groove 634, the foreign objects removed from the side outer periphery lower portion 623 are prevented from accumulating on the side blade portion 632.

[0059] Next, we will explain the mounting positions and mounting angles of the outer peripheral surface scraper 619 and the side scraper 620 relative to the governor sheave 602. First, we will explain the mounting positions and mounting angles of the outer peripheral surface scraper 619 and the side scraper 620 relative to the governor sheave 602 when viewed along the governor shaft 603.

[0060] Fig. 11 is an explanatory diagram showing the mounting positions and mounting angles of the outer circumferential surface scraper 619 and the side scraper 620 relative to the governor sheave 602 when viewed along the governor shaft 603. Fig. 11 shows cross sections perpendicular to the axial direction of the governor shaft 603 of the outer circumferential surface blade portion 625 of the outer circumferential surface scraper 619 and the side blade portion 632 of the side scraper 620.

[0061] When viewed along the governor shaft 603, each of the pair of outer circumferential surface scrapers 619 is disposed outside the pair of side surface scrapers 620 in the width direction D. In other words, each of the pair of side surface scrapers 620 is disposed between the pair of outer circumferential surface scrapers 619 in the width direction D.

[0062] One of the pair of side surface scrapers 620 is disposed adjacent to one of the pair of outer peripheral surface scrapers 619 in the width direction D. The other of the pair of side surface scrapers 620 is disposed adjacent to the other of the pair of outer peripheral surface scrapers 619 in the width direction D. Therefore, the foreign matter 11 adhering to the governor sheave 602 is first removed from the outer peripheral surface of the governor sheave 602 by the outer peripheral surface scraper 619, and then removed from the side surface of the governor sheave 602 by the side surface scraper 620.

[0063] In Fig. 11, when the governor sheave 602 rotates counterclockwise, foreign matter 11 is removed from the outer peripheral surface of the governor sheave 602 by the outer peripheral surface scraper 619 and side scraper 620 on the left side in the width direction D. On the other hand, in Fig. 11, when the governor sheave 602 rotates clockwise, foreign matter 11 is removed from the outer peripheral surface of the governor sheave 602 by the outer peripheral surface scraper 619 and side scraper 620 on the right side in the width direction D.

[0064] When viewed along the governor shaft 603, the half line that is a tangent line passing through the outer peripheral surface foreign object removal target portion 629 of the circle that constitutes the outer peripheral surface of the governor sheave 602 and is above the outer peripheral surface foreign object removal target portion 629 is defined as the outer peripheral tangent half line L1.

[0065] The outer peripheral surface blade portion 625 of the outer peripheral surface scraper 619 is disposed so that the angle θ1 between the outer peripheral tangent line L1 and the outer peripheral surface blade portion 625 is greater than 90 degrees when viewed along the governor shaft 603. In other words, the outer peripheral surface blade portion 625 is disposed so that the angle θ1 between the outer peripheral tangent line L1 and the outer peripheral surface blade portion 625 is an obtuse angle when viewed along the governor shaft 603. In addition, the outer peripheral surface blade portion 625 is disposed so as to extend downward from the outer peripheral foreign matter removal target portion 629 when viewed along the governor shaft 603.

[0066] When viewed along the governor axis 603, a half-line that is a tangent passing through the side foreign object removal target portion 636 on the circle that constitutes the outer circumferential surface of the governor sheave 602 and is above the side foreign object removal target portion 636 is defined as the side outer circumferential tangent half-line L2.

[0067] The side blade 632 of the side scraper 620 is disposed so that the angle θ2 between the side outer periphery tangent half line L2 and the side blade 632 is greater than 90 degrees when viewed along the governor shaft 603. In other words, the side blade 632 is disposed so that the angle θ2 between the side outer periphery tangent half line L2 and the side blade 632 is an obtuse angle when viewed along the governor shaft 603. In addition, the side blade 632 is disposed so as to extend downward from the side foreign object removal target portion 636 when viewed along the governor shaft 603.

[0068] Next, the mounting positions and mounting angles of the outer circumferential surface scraper 619 and the side scraper 620 relative to the governor sheave 602 when viewed from above will be described.

[0069] Fig. 12 is an explanatory diagram showing the mounting positions and mounting angles of the outer circumferential surface scraper 619 and the side scraper 620 relative to the governor sheave 602 when viewed from above. In Fig. 12, the outer circumferential surface blade portion 625 of the outer circumferential surface scraper 619 and the side blade portion 632 of the side scraper 620 are shown.

[0070] The governor sheave 602 has a first surface 637 facing the operating piece 618 of the overspeed detection switch 605 and a second surface 638 opposite to the first surface 637 .

[0071] When viewed from above, the outer circumferential surface blade portion 625 is disposed at an angle with respect to a straight line along the governor shaft 603. Furthermore, when viewed from above, the outer circumferential surface blade portion 625 is disposed such that the portion of the outer circumferential surface blade portion 625 on the first surface 637 side is farther away from the governor shaft 603 than the portion of the outer circumferential surface blade portion 625 on the second surface 638 side.

[0072] When viewed from above, the side blade portion 632 is arranged with respect to a line perpendicular to the governor shaft 603 so as to approach the governor shaft 603 as it moves away from the side outer circumferential lower portion 623.

[0073] Next, an elevator governor 5A of a first comparative example will be described. Fig. 13 is a front view showing the elevator governor 5A of the first comparative example. Fig. 14 is a left side view showing the elevator governor 5A of the first comparative example of Fig. 13. The elevator governor 5A of the first comparative example differs from the elevator governor 5 according to embodiment 1 in that it does not include a foreign object removal device 606. The other configurations of the elevator governor 5A of the first comparative example are similar to the configurations of the elevator governor 5 according to embodiment 1.

[0074] Fig. 15 is a front view showing a state in which the governor weight 604 of Fig. 13 is in contact with the overspeed detection switch 605. When the rotational speed of the governor sheave 602 reaches a preset rotational speed, the operating piece 614 of the governor weight 604 comes into contact with the operating piece 618 of the overspeed detection switch 605. As a result, the overspeed detection switch 605 detects that the speed of the car has reached the preset speed. When the overspeed detection switch 605 detects that the speed of the car has reached the preset speed, the supply of power to the hoist 4 is stopped. As a result, the car 1 comes to an emergency stop.

[0075] Next, the operation of the elevator governor 5A of the first comparative example when a foreign object adheres to the governor sheave 602 of the elevator governor 5A of the first comparative example will be described. Fig. 16 is a front view showing a state in which a foreign object 11 adheres to the governor sheave 602 of Fig. 13. Fig. 17 is a left side view showing the elevator governor 5A of the first comparative example of Fig. 16.

[0076] Oil is seeped into the governor rope 8. Some of the oil that has seeped into the governor rope 8 seeps out from the governor rope 8. The oil that seeps out from the governor rope 8 adheres to the governor sheave 602, which is in contact with the governor rope 8. As the oil that seeps out from the governor rope 8 accumulates on the governor sheave 602 one after another, foreign matter 11, which is a lump of solidified oil, adheres to the governor sheave 602.

[0077] Fig. 18 is a front view showing a state in which the foreign object 11 of Fig. 17 is in contact with the overspeed detection switch 605. When the foreign object 11 attached to the governor sheave 602 comes into contact with the operating piece 618 of the overspeed detection switch 605, the overspeed detection switch 605 makes a false detection.

[0078] Next, an elevator governor 5B of a second comparative example will be described. Fig. 19 is a front view showing a state in which a foreign object 11 has re-adhered to the governor sheave 602 of the elevator governor 5B of the second comparative example. The elevator governor 5B of the second comparative example is equipped with a foreign object removal device 639. The foreign object removal device 639 in the elevator governor 5B of the second comparative example has opposing parts that face the outer circumferential surface and the outer circumferential portion of the side surface of the governor sheave 602. The parts of the opposing parts that remove foreign objects from the outer circumferential surface and the outer circumferential portion of the side surface of the governor sheave 602 are horizontal surfaces.

[0079] Fig. 20 is a plan view showing how foreign matter 11 is removed from the outer peripheral surface and outer peripheral portion of the side surface of the governor sheave 602 by the foreign matter removal device 639 of Fig. 19. Fig. 21 is a front view showing how foreign matter 11 is removed from the outer peripheral surface and outer peripheral portion of the side surface of the governor sheave 602 by the foreign matter removal device 639 of Fig. 19. Foreign matter 11 adhering to the outer peripheral surface and outer peripheral portion of the side surface of the governor sheave 602 is removed from the governor sheave 602 by the opposing portion.

[0080] Fig. 22 is a diagram showing a state in which the amount of foreign matter 11 accumulated in the opposing portion in Fig. 20 has increased. Fig. 23 is a diagram showing a state in which the amount of foreign matter 11 accumulated in the opposing portion in Fig. 20 has increased. As the amount of foreign matter 11 accumulated on the horizontal surface of the opposing portion of the foreign matter removal device 639 increases, the foreign matter 11 re-adheres to the side surface of the governor sheave 602.

[0081] The operation of the elevator governor 5B of the second comparison example when the foreign object 11 that has accumulated on the horizontal surface facing the foreign object removal device 639 re-adheres to the side of the governor sheave 602 is similar to the operation of the elevator governor 5A of the first comparison example when the foreign object 11 adheres to the side of the governor sheave 602.

[0082] Next, removal of foreign object 11 from governor sheave 602 by elevator governor foreign object removal device 606 according to embodiment 1 will be described. Fig. 24 is a front view showing how foreign object 11 is removed from the outer circumferential surface of governor sheave 602 by outer circumferential surface scraper 619 of Fig. 5. Fig. 25 is a cross-sectional view taken along line XXV-XXV of Fig. 24. Fig. 26 is a plan view showing how foreign object 11 is removed from the outer circumferential surface of governor sheave 602 by outer circumferential surface scraper 619 of Fig. 5.

[0083] Foreign matter 11 adhering to the outer peripheral surface of the governor sheave 602 is removed from the governor sheave 602 by the outer peripheral surface blade portion 625 of the outer peripheral surface scraper 619 .

[0084] The outer circumferential surface blade portion 625 is disposed so that the angle θ1 between the outer circumferential surface half line L1 and the outer circumferential surface blade portion 625 is an obtuse angle when viewed along the governor shaft 603. As a result, the foreign matter 11 removed from the governor sheave 602 by the outer circumferential surface blade portion 625 moves in the direction of the component force A shown in Fig. 25. The direction of the component force A shown in Fig. 25 is a direction along the outer circumferential surface blade portion 625 when viewed along the governor shaft 603, and is a direction toward the downward side. Therefore, the foreign matter 11 removed from the governor sheave 602 by the outer circumferential surface blade portion 625 moves in a direction away from the governor sheave 602.

[0085] When viewed from above, the outer circumferential surface blade portion 625 is disposed such that a portion of the outer circumferential surface blade portion 625 on the first surface 637 side is farther away from the governor shaft 603 than a portion of the outer circumferential surface blade portion 625 on the second surface 638 side. As a result, the foreign objects 11 removed from the governor sheave 602 by the outer circumferential surface blade portion 625 move one after another along the outer circumferential surface blade portion 625 so as to move away from the operating piece 618 of the overspeed detection switch 605. That is, a force acts on the foreign objects 11 removed from the governor sheave 602 by the outer circumferential surface blade portion 625 in the direction of the component force C shown in FIG. 26. The direction of the component force C shown in FIG. 26 is a direction along the governor shaft 603, from the first surface 637 toward the second surface 638.

[0086] As the foreign matter 11 moves along the outer peripheral blade portion 625 and away from the operating piece 618 of the overspeed detection switch 605, the foreign matter 11 removed from the governor sheave 602 by the outer peripheral blade portion 625 is prevented from accumulating on the outer peripheral blade portion 625.

[0087] Foreign matter 11 removed from the governor sheave 602 by the outer circumferential surface blade portion 625 enters the outer circumferential surface foreign matter entrance groove portion 627. Foreign matter 11 that enters the outer circumferential surface foreign matter entrance groove portion 627 moves downward and is collected in the oil receiving container 621.

[0088] As a result, the foreign matter 11 adhering to the outer circumferential surface of the governor sheave 602 is prevented from coming into contact with the operating piece 618 of the overspeed detection switch 605. Therefore, erroneous detection by the overspeed detection switch 605 is prevented.

[0089] Fig. 27 is a front view showing how foreign matter 11 is removed from the side surface of the governor sheave 602 by the side surface scraper 620 of Fig. 8. Fig. 28 is a cross-sectional view taken along line XXVIII-XXVIII of Fig. 27. Fig. 29 is a plan view showing how foreign matter 11 is removed from the side surface of the governor sheave 602 by the side surface scraper of Fig. 8.

[0090] Foreign matter 11 adhering to the side surface of the governor sheave 602 is removed from the governor sheave 602 by the side blade portion 632 of the side scraper 620 .

[0091] The side blade portion 632 is disposed so that the angle θ2 between the side outer periphery tangent half line L2 and the side blade portion 632 is an obtuse angle when viewed along the governor shaft 603. As a result, the foreign object removed from the governor sheave 602 by the side blade portion 632 moves in the direction of the component force D shown in Fig. 28. The direction of the component force D shown in Fig. 28 is a direction along the side blade portion 632 when viewed along the governor shaft 603, and is a direction toward the lower side. Therefore, the foreign object 11 removed from the governor sheave 602 by the side blade portion 632 moves in a direction away from the governor sheave 602.

[0092] The side blade portion 632 is disposed at an incline with respect to the side surface of the governor sheave 602 so as to approach the governor shaft 603 as it moves away from the side outer periphery lower portion 623 when viewed from above. As a result, the foreign objects 11 removed from the governor sheave 602 by the side blade portion 632 move one after another along the side blade portion 632 and away from the side outer periphery lower portion 623. In other words, a force acts on the foreign objects 11 removed from the governor sheave 602 by the side blade portion 632 in the direction of the component force F shown in Fig. 29. The direction of the component force F shown in Fig. 29 is a direction along the governor shaft 603 and a direction away from the side outer periphery lower portion 623.

[0093] As the foreign matter 11 moves along the side blade portion 632 and away from the lower portion 623 on the outer periphery of the side surface, the foreign matter 11 removed from the governor sheave 602 by the side blade portion 632 is prevented from accumulating on the side blade portion 632.

[0094] The overhanging portion 633 prevents the foreign matter 11 removed from the side peripheral lower portion 623 by the side blade portion 632 from moving upward. This prevents the foreign matter 11 that has moved from the side peripheral lower portion 623 to the side blade portion 632 from moving upward from the side blade portion 632.

[0095] Foreign matter 11 removed from the governor sheave 602 by the side blade portion 632 enters the side foreign matter entrance groove portion 634. Foreign matter 11 that enters the side foreign matter entrance groove portion 634 moves downward and is collected in the oil receiving container 621.

[0096] As a result, foreign matter 11 adhering to the side surface of governor sheave 602 is prevented from coming into contact with operating piece 618 of overspeed detection switch 605. Therefore, erroneous detection by overspeed detection switch 605 is prevented.

[0097] As described above, the foreign object removal device 606 of the elevator governor according to the first embodiment includes an outer peripheral surface scraper 619 that removes foreign objects 11 from an outer peripheral surface lower portion 622, which is a portion of the outer peripheral surface of the governor sheave 602 that is below the governor shaft 603. The outer peripheral surface scraper 619 has an outer peripheral surface blade portion 625 whose tip portion faces the outer peripheral surface lower portion 622 from below. When viewed from above, the outer peripheral surface blade portion 625 is disposed at an angle with respect to a straight line along the governor shaft 603. According to this configuration, the outer peripheral surface scraper 619 removes the foreign objects 11 from the outer peripheral surface of the governor sheave 602, and the removed foreign objects 11 move along the outer peripheral surface blade portion 625. This makes it possible to suppress the foreign objects 11 attached to the outer peripheral surface scraper 619 from adhering again to the outer peripheral surface of the governor sheave 602. As a result, the foreign matter 11 removed from the governor sheave 602 can be prevented from adhering again to the governor sheave 602.

[0098] Moreover, in the foreign object removal device 606 for an elevator governor according to the first embodiment, the outer peripheral surface blade portion 625 is disposed such that, when viewed from above, a portion of the outer peripheral surface blade portion 625 on the first surface 637 side is farther away from the governor shaft 603 than a portion of the outer peripheral surface blade portion 625 on the second surface 638 side. According to this configuration, the outer peripheral surface scraper 619 removes the foreign object 11 from the outer peripheral surface of the governor sheave 602, and the removed foreign object 11 moves in a direction away from the operating piece 618 of the overspeed detection switch 605. This makes it possible to prevent the foreign object 11 attached to the outer peripheral surface scraper 619 from adhering again to the outer peripheral surface of the governor sheave 602. As a result, it is possible to prevent the foreign object 11 removed from the governor sheave 602 from adhering again to the governor sheave 602.

[0099] Moreover, in the foreign object removal device 606 for an elevator governor according to the first embodiment, the outer circumferential surface scraper 619 has a partition 626 provided on the side of the operating piece 618 of the overspeed detection switch 605 relative to the outer circumferential surface blade portion 625 in the direction along the governor shaft 603. The partition 626 prevents the foreign object 11 removed from the outer circumferential surface lower portion 622 by the outer circumferential surface blade portion 625 from moving toward the operating piece 618 of the overspeed detection switch 605. This configuration prevents the foreign object 11 from moving from the outer circumferential surface blade portion 625 toward the operating piece 618 of the overspeed detection switch 605. As a result, even if a large amount of foreign object 11 is removed from the outer circumferential surface lower portion 622 by the outer circumferential surface blade portion 625, the removed foreign object 11 can be prevented from moving toward the operating piece 618 of the overspeed detection switch 605.

[0100] In addition, in the elevator governor foreign object removal device 606 according to the first embodiment, the outer peripheral surface scraper 619 has an outer peripheral surface foreign object entrance groove 627. The outer peripheral surface foreign object entrance groove 627 is provided on the opposite side of the outer peripheral surface blade portion 625 to the operating piece 618 of the overspeed detection switch 605 in the direction along the governor shaft 603. The foreign object 11 removed from the outer peripheral surface lower portion 622 by the outer peripheral surface blade portion 625 enters the outer peripheral surface foreign object entrance groove 627. According to this configuration, the foreign object 11 removed from the outer peripheral surface lower portion 622 by the outer peripheral surface blade portion 625 enters the outer peripheral surface foreign object entrance groove 627. As a result, even if a large amount of foreign object 11 is removed from the outer peripheral surface lower portion 622 by the outer peripheral surface blade portion 625, the removed foreign object 11 can be prevented from moving toward the operating piece 618 of the overspeed detection switch 605.

[0101] Moreover, in elevator governor foreign object removal device 606 according to embodiment 1, outer peripheral surface blade portion 625 has rope groove insertion portion 630 that is inserted into rope groove 611 formed on the outer peripheral surface of governor sheave 602. According to this configuration, foreign object 11 adhering to the inner peripheral surface of rope groove 611 can be removed.

[0102] Moreover, the foreign object removal device 606 of the elevator governor according to the first embodiment includes a side scraper 620 that removes the foreign object 11 from the side outer periphery lower portion 623, which is an outer periphery side portion of the side of the governor sheave 602 and is a portion that is below the governor shaft 603. The side scraper 620 has a side blade portion 632 that faces the side outer periphery lower portion 623. When viewed from above, the side blade portion 632 is disposed at an incline with respect to the side of the governor sheave 602 so as to approach the governor shaft 603 as it moves away from the side outer periphery lower portion 623. According to this configuration, the side scraper 620 removes the foreign object 11 from the side of the governor sheave 602, and the removed foreign object 11 moves along the side blade portion 632. This makes it possible to suppress the foreign object 11 that has adhered to the side scraper 620 from adhering again to the side of the governor sheave 602. As a result, the foreign matter 11 removed from the governor sheave 602 can be prevented from adhering again to the governor sheave 602.

[0103] Moreover, in the foreign object removal device 606 for an elevator governor according to the first embodiment, the side scraper 620 has a eaves portion 633 provided above the side blade portion 632. The eaves portion 633 prevents the foreign object 11 removed from the side outer periphery lower portion 623 by the side blade portion 632 from moving upward. With this configuration, the foreign object 11 moved from the side outer periphery lower portion 623 to the side blade portion 632 is prevented from moving upward from the side blade portion 632. As a result, even if a large amount of foreign object 11 is removed from the side outer periphery lower portion 623 by the side blade portion 632, the removed foreign object 11 can be prevented from moving toward the operating piece 618 of the overspeed detection switch 605.

[0104] In the above-mentioned first embodiment, the configuration of the elevator governor foreign object removal device 606 including a pair of outer circumferential surface scrapers 619 and a pair of side scrapers 620 has been described. However, the present invention is not limited to this. For example, the elevator governor foreign object removal device 606 may be configured to include one outer circumferential surface scraper 619 and one side scraper 620.

[0105] In the above-mentioned first embodiment, the configuration of the elevator governor foreign object removal device 606 including the outer circumferential surface scraper 619 and the side surface scraper 620 has been described. However, the present invention is not limited to this. For example, the elevator governor foreign object removal device 606 may be configured to include the outer circumferential surface scraper 619 and not include the side surface scraper 620.

[0106] Although foreign object removal device 606 for an elevator governor according to the preferred embodiment 1 has been described above, the invention is not limited to foreign object removal device 606 for an elevator governor according to the above-described embodiment 1. Various modifications and conversions can be made to foreign object removal device 606 for an elevator governor according to the above-described embodiment 1 without departing from the scope of the claims.

[0107] (Appendix 1) an outer peripheral scraper for removing foreign matter from a lower portion of the outer peripheral surface of the governor sheave that is a portion of the outer peripheral surface of the governor sheave that is below the governor shaft; The outer peripheral surface scraper has an outer peripheral surface blade portion whose tip portion faces the outer peripheral surface lower portion from below, A foreign object removal device for an elevator governor, wherein the outer peripheral blade portion is arranged at an angle with respect to a straight line along the governor axis when viewed from above. (Appendix 2) the governor sheave has a first surface facing an operating piece of the overspeed detection switch and a second surface opposite to the first surface, 2. A foreign object removal device for an elevator governor as described in Appendix 1, wherein the outer circumferential surface blade portion is arranged so that, when viewed from above, a portion of the outer circumferential surface blade portion on the first surface side is farther away from the governor shaft than a portion of the outer circumferential surface blade portion on the second surface side. (Appendix 3) The outer peripheral surface detection scraper has a partition provided on one side of the operating side of the overspeed detection switch relative to the outer peripheral surface blade portion in a direction along the governor shaft, 3. A foreign object removal device for an elevator governor as described in Appendix 2, wherein the partition prevents the foreign object removed from the lower portion of the outer circumferential surface by the outer circumferential surface blade portion from moving toward the operating piece of the overspeed detection switch. (Appendix 4) The outer peripheral surface scraper has an outer peripheral surface foreign object entry groove portion provided on the opposite side of the outer peripheral surface blade portion to the operating piece of the overspeed detection switch in a direction along the governor shaft, A foreign object removal device for an elevator governor as described in Appendix 2 or Appendix 3, wherein the foreign object removed from the lower portion of the outer circumferential surface by the outer circumferential surface blade portion enters the outer circumferential surface foreign object entry groove portion. (Appendix 5) 5. A foreign object removal device for an elevator governor according to any one of Supplementary Note 1 to Supplementary Note 4, wherein the outer peripheral surface blade portion has a rope groove insertion portion to be inserted into a rope groove formed on an outer peripheral surface of the governor sheave. (Appendix 6) a side scraper for removing foreign matter from a side outer peripheral lower portion of the governor sheave, the side portion being a portion of the outer peripheral side of the governor sheave that is below the governor shaft; The side scraper has a side blade portion facing the outer circumferential lower portion of the side surface, 6. A foreign object removal device for an elevator governor according to any one of Supplementary Note 1 to Supplementary Note 5, wherein the side blade portion, when viewed from above, is disposed at an incline with respect to a side surface of the governor sheave so as to approach the governor shaft with increasing distance from the lower outer circumferential portion of the side surface. (Appendix 7) The side scraper has a visor portion provided above the side blade portion, The foreign object removal device for an elevator governor described in Appendix 6, wherein the overhanging portion suppresses upward movement of foreign objects removed from the lower portion of the outer periphery of the side surface by the side blade portion. [Explanation of symbols]

[0108] 1 cage, 2 counterweight, 3 main rope, 4 hoist, 5 elevator governor, 6 governor body, 7 tension wheel, 8 governor rope, 9 connecting member, 10 machine room floor, 11 foreign object, 601 governor frame, 602 governor sheave, 603 governor shaft, 604 governor weight, 605 overspeed detection switch, 606 foreign object removal device, 607 foundation, 608 first side plate, 609 second side plate, 610 fixed anchor bolt, 611 rope groove, 612 weight shaft, 613 weight body, 614 operating piece, 615 one end in the longitudinal direction, 616 other end in the longitudinal direction, 617 switch box, 618 operating piece, 619 outer peripheral surface scraper, 620 side scraper, 621 Oil receiving container, 622 lower portion of outer peripheral surface, 623 lower portion of outer peripheral side surface, 624 base portion of outer peripheral surface, 625 blade portion of outer peripheral surface, 626 partition, 627 groove portion for foreign object entry on outer peripheral surface, 628 screw, 629 portion of outer peripheral surface for removing foreign object, 630 rope groove insertion portion, 631 base portion of side surface, 632 blade portion of side surface, 633 eaves portion, 634 groove portion for foreign object entry on side surface, 635 screw, 636 portion of side surface for removing foreign object, 637 first surface, 638 second surface, 639 foreign object removal device, 701 frame for tensioner, 702 tensioner sheave, 703 weight for tensioner.

Claims

1. an outer peripheral surface scraper for removing foreign matter from a lower portion of the outer peripheral surface of the governor sheave that is a portion of the outer peripheral surface that is below the governor shaft; The outer peripheral surface scraper has an outer peripheral surface blade portion whose tip portion faces the outer peripheral surface lower portion from below, A foreign object removal device for an elevator governor, wherein the outer peripheral blade portion is arranged at an angle with respect to a straight line along the governor axis when viewed from above.

2. the governor sheave has a first surface facing an operating piece of the overspeed detection switch and a second surface opposite to the first surface, 2. The foreign object removal device for an elevator governor according to claim 1, wherein the outer peripheral surface blade portion is arranged so that, when viewed from above, a portion of the outer peripheral surface blade portion on the first surface side is farther away from the governor shaft than a portion of the outer peripheral surface blade portion on the second surface side.

3. The outer peripheral surface scraper has a partition provided on one side of the operating side of the overspeed detection switch relative to the outer peripheral surface blade portion in a direction along the governor shaft, 3. The foreign object removal device for an elevator governor according to claim 2, wherein the partition prevents the foreign object removed from the lower portion of the outer circumferential surface by the outer circumferential surface blade portion from moving toward the operating piece of the excessive speed detection switch.

4. The outer peripheral surface scraper has an outer peripheral surface foreign object entry groove portion provided on the opposite side of the outer peripheral surface blade portion to the operating piece of the overspeed detection switch in a direction along the governor shaft, 4. The foreign object removal device for an elevator governor according to claim 2, wherein the foreign object removed from the lower portion of the outer circumferential surface by the outer circumferential surface blade portion enters the outer circumferential surface foreign object entrance groove portion.

5. 4. A foreign object removal device for an elevator governor according to claim 1, wherein the outer peripheral surface blade portion has a rope groove insertion portion that is inserted into a rope groove formed on an outer peripheral surface of the governor sheave.

6. a side scraper for removing foreign matter from a side outer peripheral lower portion of the governor sheave, the side portion being a portion of the outer peripheral side of the governor sheave that is below the governor shaft; The side scraper has a side blade portion facing the outer circumferential lower portion of the side surface, 4. The foreign object removal device for an elevator governor according to claim 1, wherein the side blade portion is disposed at an incline with respect to a side surface of the governor sheave so as to approach the governor shaft with increasing distance from the lower outer circumferential portion of the side surface when viewed from above.

7. The side scraper has a visor portion provided above the side blade portion, 7. The foreign object removal device for an elevator governor according to claim 6, wherein the overhanging portion prevents the foreign object removed from the lower outer circumferential portion of the side surface by the side blade portion from moving upward.

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