JPWO2006008813A1 - Elevator governor - Google Patents

Abstract

In an elevator governor, a sheave around which a governor rope is wound is rotatably supported by a base. An engagement piece for operation is provided on the base, and a ratchet that is rotatable about the sheave shaft of the sheave is supported. The sheave is provided with an engaging mechanism that has a claw that is engaged with the ratchet when the rotational speed of the sheave reaches a set overspeed, and rotates the ratchet in the same direction as the sheave. A rope gripping mechanism for braking the governor rope is disposed below the sheave. The rope gripping mechanism is connected to an operating lever for operating the rope gripping mechanism by being pushed and displaced by the operating engagement piece. The base is provided with a groove portion into which a part of the operating engagement piece is inserted and extending in the moving direction in the operating engagement piece.

Description

  The present invention relates to a speed governor for an elevator for operating an emergency stop device by detecting an overspeed of a car or a counterweight.

  Conventionally, there has been proposed an elevator governor in which a sheave around which a governor rope is wound and a rope gripping mechanism for gripping the governor rope are supported by a stand. The rope gripping mechanism is disposed below the sheave. The stand also supports a ratchet that rotates coaxially with the sheave. The sheave is provided with a claw that engages with the ratchet when the speed of rotation of the sheave reaches a preset overspeed. The ratchet is rotated with the sheave by engagement of the pawl with the ratchet.

  A hook member is connected to the rope gripping mechanism. Normally, the hook member is locked by a locking protrusion fixed to the stand. On the side surface of the ratchet, an unlocking projection for releasing the hook member from the locking projection is provided. The hook member is pushed by a locking release protrusion that is moved along with the rotation of the ratchet, and is removed from the locking protrusion. The rope gripping mechanism is actuated when the hook member is removed from the locking projection. The stand is formed with a plurality of protrusions for attaching a sheave, a ratchet, a rope gripping mechanism, and a locking projection.

Japanese Patent Laid-Open No. 8-119555

  However, in such a conventional elevator speed governor, since the unlocking protrusion simply extends from the side surface of the ratchet, for example, when the ratchet is rotated slowly, such as during a speed confirmation operation check test, etc. In some cases, the ratchet or the hook member may be elastically deformed when the hook member is removed from the locking projection. In this case, there is a problem that the hook member escapes from the locking projection and the speed governor does not operate reliably.

  In addition, since there is no mechanism for releasing the operation of the rope gripping mechanism or the engagement of the claw with the ratchet after the speed governor is operated, it takes time to return the operation of the speed governor.

  Furthermore, since the shape of the stand is complicated to support the sheave and the rope gripping mechanism, the stand may be cast or shaped steel, etc., and the stand becomes larger and the speed governor is lighter It was an obstacle.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain an elevator governor that can operate more reliably.

  It is another object of the present invention to provide an elevator governor that can easily perform return work after operation.

  Furthermore, it aims at obtaining the speed governor of the elevator which can achieve size reduction and weight reduction.

  A speed governor for an elevator according to the present invention includes a base installed in a hoistway, a sheave that is rotatably supported by the base, and on which a speed governor rope is wound, and that rotates in accordance with the ascending / descending speed of the car. The operation engagement piece is provided, and is rotatable between a ratchet rotatable about the sheave shaft of the sheave, an operation position engaged with the ratchet, and a release position where the engagement with the ratchet is released. When the sheave has a claw provided on the sheave and the sheave rotation speed reaches a preset overspeed, the claw is rotated from the release position to the operating position, and the ratchet is in the same direction as the sheave An engagement mechanism that rotates to the right, an actuating lever that contacts and displaces the actuating engagement piece by the movement of the actuating engagement piece by the rotation of the ratchet, and an actuating mechanism that comes into contact with the actuating engagement piece A rope grab that is actuated by lever displacement to brake the governor rope A mechanism, the base, is inserted part of the hydraulic engaging piece, and the groove extending in the direction of movement of the actuating engaging piece is provided.

FIG. 1 is a configuration diagram showing an elevator according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view showing the elevator governor of FIG.
FIG. 3 is a perspective view showing the speed governor when viewed from another direction of FIG.
FIG. 4 is a front view showing the governor of FIG.
FIG. 5 is a side view showing the governor of FIG.
6 is a cross-sectional view taken along line VI-VI in FIG.
FIG. 7 is a sectional view taken along line VII-VII in FIG.
FIG. 8 is an enlarged view showing the upper link of FIG.
FIG. 9 is a sectional view taken along line IX-IX in FIG.
FIG. 10 is an explanatory diagram showing a normal state of the governor of FIG.
FIG. 11 is an explanatory diagram showing a state during operation of the governor of FIG.
FIG. 12 is an explanatory view showing a state where the lower return lever of FIG. 11 is rotated radially outward.
[FIG. 13] It is explanatory drawing which shows the state by which the lower link of FIG. 12 was displaced upwards.
FIG. 14 is an explanatory view showing a state where the upper return lever of FIG. 13 is rotated radially outward.
FIG. 15 is a longitudinal sectional view showing an elevator governor according to Embodiment 2 of the present invention.
FIG. 16 is a sectional view taken along line XVI-XVI in FIG.
FIG. 17 is a cross-sectional view of a principal part of an elevator governor according to Embodiment 3 of the present invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a hoisting machine 4 for raising and lowering a car 2 and a counterweight 3 is installed in the upper part of the hoistway 1. A baffle 5 is provided in the vicinity of the hoisting machine 4. The hoisting machine 4 includes a hoisting machine main body 6 including a motor, and a drive sheave 7 rotated by the hoisting machine main body 6. A main rope 8 for suspending the car 2 and the counterweight 3 is wound around the driving sheave 7 and the deflecting wheel 5. The car 2 and the counterweight 3 are moved up and down in the hoistway 1 by driving the hoisting machine 4.

  A mechanical emergency stop device 9 is mounted on the lower portion of the car 2 to engage with a guide rail (not shown) to stop the car 2 in an emergency. A speed governor 10 is provided in the upper part of the hoistway 1. A tension wheel 11 is provided in the lower part of the hoistway 1. A governor rope 12 is wound around the governor 10 and the tension wheel 11. Both ends of the governor rope 12 are connected to an operating lever 9 a of the safety device 9.

  FIG. 2 is a perspective view showing the elevator governor 10 of FIG. FIG. 3 is a perspective view showing the speed governor 10 when viewed from another direction of FIG. 4 is a front view showing the governor 10 in FIG. 2, FIG. 5 is a side view showing the governor 10 in FIG. 2, FIG. 6 is a sectional view taken along line VI-VI in FIG. FIG. 5 is a sectional view taken along line VII-VII in FIG. 4. In the figure, the governor rope 12 is wound around a governor sheave 13 that is a sheave. The governor sheave 13 is supported by a base 14 fixed in the hoistway 1 so as to be rotatable about a sheave shaft 15. Therefore, the governor sheave 13 is rotated around the sheave shaft 15 according to the ascending / descending speed of the car 2.

  The base 14 has a pair of support plates 16 and 17 that face each other. The support plate 16 and the support plate 17 have the same shape. Further, the support plates 16 and 17 are disposed on both sides of the governor sheave 13 in the axial direction. Accordingly, one end portion of the sheave shaft 15 is rotatably supported by the support plate 16, and the other end portion of the sheave shaft 15 is rotatably supported by the support plate 17. The sheave shaft 15 is horizontally disposed between the support plates 16 and 17.

  A pair of shafts 18 parallel to the sheave shaft 15 are fixed to the side surface of the governor sheave 13. One end of a flyweight 19 is rotatably attached to each shaft 18. The flyweights 19 are arranged symmetrically with respect to the sheave shaft 15 (FIG. 6).

  An operating piece 20 that protrudes radially outward of the governor sheave 13 is fixed to the other end of one flyweight 19. The flyweight 19 is rotated around the shaft 18 by the centrifugal force generated by the rotation of the governor sheave 13. Thereby, the operating piece 20 is rotated radially outward of the governor sheave 13. A balance spring 21 is provided between one end of one flyweight 19 and the governor sheave 13 to resist centrifugal force. A car stop switch 22 for operating a brake device (not shown) of the hoisting machine 4 is attached to the base 14. The car stop switch 22 is disposed between the support plates 16 and 17. The car stop switch 22 has a switch lever 22 a (FIG. 6) operated by the operating piece 20.

  The governor sheave 13 is provided with a pin 23 parallel to the shaft 18. One end of a trip lever 24 is rotatably attached to the pin 23. The other end of the trip lever 24 is in contact with the outer surface of one flyweight 19. The trip lever 24 is rotated around the pin 23 by the rotation of the flyweight 19. The pin 23 is provided with a torsion spring 25 that urges the other end of the trip lever 24 in a direction in which the other end of the trip lever 24 contacts the flyweight 19 (clockwise in FIG. 6).

  The base 14 is provided with a ratchet 26 that can rotate around the sheave shaft 15. The ratchet 26 is disposed between the one support plate 16 and the governor sheave 13. A plurality of teeth are provided on the outer periphery of the ratchet 26. Further, a horizontally-engaging engagement piece 27 is fixed to the side surface of the ratchet 26 (FIG. 6). A pawl 28 that selectively engages either the trip lever 24 or the ratchet 26 is pivotally supported on one shaft 18. That is, the pawl 28 is engaged between the operating position where the engagement with the trip lever 24 is released and engaged with the ratchet 26 and the release position where the engagement with the ratchet 26 is released and engaged with the trip lever 24. The shaft 18 can be turned around. The claw 28 is urged in a direction to engage with the ratchet 26 by an urging spring (not shown). The pawl 28 is normally separated from the ratchet 26 by being engaged with the trip lever 24. When the engagement with the trip lever 24 is released, the pawl 28 is rotated by the spring force of the urging spring and is engaged with the ratchet 26. Combined. When the pawl 28 is in the operating position, the ratchet 26 is rotated in the same direction as the governor sheave 13.

  The engagement mechanism 30 includes a flyweight 19, a balance spring 21, a trip lever 24, and a claw 28.

  A rope gripping mechanism 31 for gripping the governor rope 12 is provided below the governor sheave 13. The rope gripping mechanism 31 is supported by the base 14. The rope gripping mechanism 31 is disposed between the support plates 16 and 17.

  The rope gripping mechanism 31 includes a fixed-side rope gripping part 32 that is a receiving part fixed to the base 14 and a telescopic telescopic extension having one end rotatably attached to a support shaft 33 supported by the base 14. The movable side rope which is a movable part which is attached to the rod 34 and the other end of the telescopic rod 34 so as to be pivotable and is displaced in the direction of moving toward and away from the fixed side rope gripping part 32 by the pivoting of the telescopic rod 34. It has a grip 35 and a pressing spring 36 disposed between the movable rope grip 35 and the support shaft 33 (FIG. 6).

  The movable rope gripping portion 35 is positioned above and below the restraining position where the governor rope 12 is restrained with the fixed rope gripping portion 32 by the rotation of the telescopic rod 34, and the governor rope. It is possible to displace between an open position for releasing 12 constraints. When the movable rope gripping portion 35 is in the restraining position, the telescopic rod 34 and the pressing spring 36 are contracted, and the movable rope gripping portion 35 is fixed by the elastic restoring force of the pressing spring 36. Is pressed in the direction in contact with (FIG. 6).

  Between the governor sheave 13 and the rope gripping mechanism 31, a horizontally extending rod-shaped locking member 37 is disposed (FIG. 6). The locking member 37 is fixed between the support plates 16 and 17. A lower end portion of an operation lever 38 extending upward from the movable side rope gripping portion 35 is rotatably connected to the movable side rope gripping portion 35. The actuating lever 38 includes a recess 39 for latching the actuating lever 38 to the latching member 37, and an actuating lever mounting pin passed through a long hole 40 (FIG. 2) provided in the support plate 16. 41 is provided. Between the actuating lever mounting pin 41 and the support plate 16, there is provided a pulling spring 42 that urges the actuating lever 38 in a direction in which the actuating lever 38 is engaged with the engaging member 37 (FIG. 2). The movable rope gripping portion 35 is held in the open position by the operation lever 38 being locked by the locking member 37.

  In a state where the operating lever 38 is locked to the locking member 37, the upper end portion of the operating lever 38 is inserted between the ratchet 26 and the support plate 16. In this state, the upper end portion of the actuating lever 38 is brought into contact with the actuating engagement piece 27 by the rotation of the ratchet 26. The actuating lever 38 is displaced in the rotation direction of the ratchet 26 against the urging force of the pulling spring 42 by contact with the actuating engagement piece 27. The operating lever 38 is disengaged from the engaging member 37 due to the displacement of the upper end portion of the ratchet 26 in the rotational direction. The movable rope gripping portion 35 is displaced by its own weight to the lower restrained position when the operating lever 38 is removed from the locking member 37 (FIG. 6).

  An upper return lever 43 and a lower return lever 44 which are a pair of return levers for displacing the position of the claw 28 from the operating position to the release position are rotatably supported on the support plate 16 (see FIG. 2, FIG. 6). The upper return lever 43 and the lower return lever 44 are curved plate-like members extending in the substantially circumferential direction of the ratchet 26. Further, the upper return lever 43 and the lower return lever 44 are disposed around the sheave shaft 15 and are disposed between the support plate 16 and the ratchet 26. Further, the upper return lever 43 and the lower return lever 44 are arranged symmetrically with respect to the horizontal plane including the sheave shaft 15. One end 43a of the upper return lever 43 and one end 44a of the lower return lever 44 are supported on the support plate 16 so as to be rotatable.

  On the side surface of the claw 28, a return projection 45 extending from the claw 28 toward the support plate 16 is provided. The claw 28 is displaced from the operating position to the release position by rotating the upper return lever 43 and the lower return lever 44 radially outward while being in contact with the return protrusion 45. The upper return lever 43 and the lower return lever 44 are arranged so that the pawl 28 is in the release position regardless of the position of the return protrusion 45 at the outer peripheral portion of the upper return lever 43 or the outer peripheral portion of the lower return lever 44. It is shaped so as to be displaced.

  An upper return lever pin 46 penetrating the support plate 16 is provided at the other end 43 b of the upper return lever 43. Further, a lower return lever pin 47 penetrating the support plate 16 is provided at the other end 44b of the lower return lever 44 (FIGS. 4 and 6).

  The support plate 16 is provided with an upper lever slot 48 for passing the upper return lever pin 46 and a lower lever slot 49 for passing the lower 000 return lever pin 47. The upper lever slot 48 extends along the moving direction of the upper return lever pin 46 by the rotation of the upper return lever 43. The lower lever slot 49 extends along the moving direction of the lower return lever pin 47 by the rotation of the lower return lever 44 (FIGS. 2 to 4).

  The support plate 16 supports a link mechanism 50 for interlocking the operating lever 38, the upper return lever 43, and the lower return lever 44 (FIGS. 2 and 4). The link mechanism 50 includes an upper link 51 connected to the upper return lever pin 46 and the lower return lever pin 47, and a lower link 52 connected to the upper return lever pin 46 and the operating lever mounting pin 41. Have.

  Here, FIG. 8 is an enlarged view showing the upper link 51 of FIG. As shown in the drawing, the upper link 51 is provided with an elongated hole 53 through which the upper return lever pin 46 is slidably passed and a through hole 54 through which the lower return lever pin 47 is passed. .

  A tension spring 55 is provided between the upper link 51 and the support plate 16 to urge the upper link 51 in a direction in which the lower return lever 44 is pivoted radially inward. The upper link 51 is urged upward with respect to the support plate 16 by the tension spring 55.

  The lower link 52 is provided with an elongated hole 56 through which the upper return lever pin 46 is slidably passed, and an elongated hole 57 through which the operating lever mounting pin 41 is slidably passed. In addition, a sheath attachment member 59 to which a bendable sheath 58 is connected is fixed to an intermediate portion of the lower link 52. A remote operation wire 60 is passed through the sheath 58. The remote operation wire 60 is passed through the sheath attachment member 59. The end of the remote operation wire 60 is connected to the upper link 51.

  When the movable rope gripping portion 35 is in the open position, the upper return lever pin 46 is positioned at the lower end of the elongated hole 53 of the upper link 51 and the upper end of the elongated hole 56 of the lower link 52, and the lower link 52 The actuating lever mounting pin 41 is located at the upper end of the elongated hole 57 (FIGS. 2 and 4).

  9 is a cross-sectional view taken along line IX-IX in FIG. In the drawing, on the side surface of the support plate 16, a groove portion 61 into which the distal end portion (part) of the operating engagement piece 27 is inserted is provided. The groove 61 extends along the moving direction of the operating engagement piece 27 when the ratchet 26 is rotated.

  Next, the operation will be described. When the raising / lowering speed of the car 2 reaches the first overspeed, the operating piece 20 comes into contact with the switch lever 22a by the rotation of the flyweight 19 due to the centrifugal force to rotate the switch lever 22a. As a result, the car stop switch 22 is activated, the power of the hoisting machine 4 is cut off, and the car 2 is stopped by the brake device of the hoisting machine 4.

  Further, even when the hoisting machine 4 stops, for example, when the main rope 8 is broken, the car 2 continues to descend without stopping, and the descending speed of the car 2 reaches the second overspeed (set overspeed). Then, the flyweight 19 is further rotated, and the amount of rotation of the trip lever 24 is increased accordingly, and the engagement between the trip lever 24 and the claw 28 is released. Thereby, the claw 28 is rotated from the release position to the operating position by the urging force of the urging spring and is engaged with the teeth of the ratchet 26. Thereby, the ratchet 26 is slightly rotated counterclockwise in FIG. 6 together with the governor sheave 13.

  When the ratchet 26 is rotated, the operating engagement piece 27 comes into contact with the upper end portion of the operating lever 38 and the operating lever 38 is rotated. As a result, the actuating lever 38 is disengaged from the locking member 37, and the movable rope gripping portion 35 is displaced to the lower restraining position by its own weight. The telescopic rod 34 is contracted while being rotated about the support shaft 33 by the drag of the fixed rope grip 32 received by the movable rope grip 35 at this time. As a result, the pressing spring 36 is contracted, and the movable side rope gripping portion 35 is strongly pressed against the fixed side rope gripping portion 32 via the governor rope 12. In this way, the rope gripping mechanism 31 operates (trip operation), and the governor rope 12 is braked. When the circulation of the governor rope 12 is stopped, the car 2 continues to descend, whereby the operation lever 9a is operated and the emergency stop device 9 is operated.

  FIG. 10 is an explanatory diagram showing a normal state of the governor 10 of FIG. As shown in the drawing, in normal times, the operating lever 38 is locked to the locking member 37, and the movable rope gripping portion 35 is disposed at the open position. Further, the upper return lever 43 is rotated inward in the radial direction by the weight of the other end 43 b, and the lower return lever 44 is rotated by the urging force of the tension spring 55. In this state, the upper return lever pin 46 is in contact with the lower end portion of the elongated hole 53, and the operating lever mounting pin 41 is in contact with the upper end portion of the elongated hole 57.

  FIG. 11 is an explanatory diagram showing a state during operation of the governor 10 of FIG. When the rope gripping mechanism 31 is operated, the locking of the operating lever 38 to the locking member 37 is released, and the movable rope gripping portion 32 is displaced from the open position to the restraining position. At this time, the operating lever mounting pin 41 is slid from the upper end portion of the elongated hole 57 of the lower link 52 to the lower end portion while maintaining the positions of the link mechanism 50, the upper return lever 43 and the lower return lever 44.

  Next, the return operation after the trip operation of the governor 10 will be described. 12-14 is explanatory drawing explaining the return operation | movement of the governor 10 of FIG. 11, FIG. 12 is explanatory drawing which shows the state which the lower side return lever 44 of FIG. 11 rotated to the radial direction outer side. 13 is an explanatory view showing a state where the lower link 52 of FIG. 12 is displaced upward, and FIG. 14 is an explanatory view showing a state where the upper return lever 43 of FIG. 13 is rotated radially outward.

  For example, when the remote control wire 60 is pulled down against the bias of the pulling spring 55 by an operation at a place away from the speed governor 10 such as a landing, the upper link 51 connected to the remote control wire 60 is also moved downward. Pulled down. At this time, the upper link 51 is slid along the elongated hole 53 with respect to the upper return lever pin 46. As a result, the lower return lever pin 47 is displaced downward, and the lower return lever 44 is rotated radially outward. Thereafter, the lower lever slot 49 (FIG. 4) provided in the support plate 16 is brought into contact with the lower end (FIG. 12).

  Thereafter, when a pulling force is further applied to the remote operation wire 60, a reaction force against the pulling force to the remote operation wire 60 acts on the contact portion of the wire attachment member 59 with the remote operation wire 60. The reaction force acting on the wire attachment member 59 includes an upward component, whereby the lower link 52 is pulled upward while being slid along the elongated hole 56 with respect to the upper return lever 43. Thereafter, the upper return lever pin 46 is brought into contact with the lower end portion of the elongated hole 56. At this time, the movable rope gripping portion 35 is also displaced upward together with the lower link 52 (FIG. 13).

  Thereafter, when the lower link 52 is further pulled upward, the upper return lever pin 46 is also displaced upward, and the upper lever elongated hole 48 provided in the support plate 16 (FIG. 4). ). In this way, the upper return lever 43 is rotated radially outward. At this time, the upper return lever pin 46 is slid along the elongated hole 53 of the upper link 51. Further, the movable rope gripping portion 35 is also displaced to the open position, and the actuating lever 38 is locked to the locking member 37 by the biasing force of the pulling spring 42 (FIG. 14).

  When the return protrusion 45 (FIGS. 2 and 6) is within a predetermined range, the upper return lever 43 and the lower return lever 44 and the lower return lever 44 are pivoted outwardly in the radial direction. One of the levers 44 comes into contact with the return projection 45. As a result, the pawl 28 is rotated against the urging force of the urging spring, and is returned from the operating position engaged with the teeth of the ratchet 26 to the release position engaged with the trip lever 24. That is, when the return protrusion 45 is located on any one of the rotation paths of the upper return lever 43 and the lower return lever 44, the claw 28 can be returned from the operating position to the release position.

  Thus, the return of the speed governor 10 is completed by displacing the claw 28 to the release position and displacing the movable rope gripping portion 35 to the open position.

  In such a speed governor 10, the ratchet 26 is provided with an operation engagement piece 27 for operating the rope gripping mechanism 31 by displacing the operation lever 38, and the support plate 16 has an operation engagement member. Since the groove portion 61 into which a part of the combined piece 27 is inserted is provided, due to the elastic deformation of the ratchet 26 and the support plate 16 when the operating engagement piece 27 comes into contact with the operating lever 38, The lever 38 can be prevented from escaping from the gap between the operating engagement piece 27 and the support plate 16, and the operating lever 38 can be displaced more reliably. Therefore, the governor 10 can be operated more reliably.

  Further, the support plate 16 is disposed around the sheave shaft 15, and is rotated at one end portions 43 a and 44 a of the upper return lever 43 and the lower return lever 44 that are curved so as to surround the sheave shaft 15. The pawl 28 is pushed up by either the upper return lever 43 or the lower return lever 44 that is rotated in a direction away from the sheave shaft 15 (outward in the radial direction) to move from the operating position to the release position. Since the claw 28 is rotated, the range in which the position of the claw 28 is pushed up to the release position by the upper return lever 43 and the lower return lever 44 is widened, and the reliability of the return operation of the claw 28 can be improved. it can.

  Further, the operating lever 38, the upper return lever 43 and the lower return lever 44 are interlocked with each other by the link mechanism 50, and a remote operation wire 60 for displacing the link mechanism 50 is connected to the link mechanism. 50, the link mechanism 50 can be displaced simply by operating the remote control wire 60 from the landing, for example, even if the operator does not enter the hoistway 1 to return the governor 10. The claw 28 can be displaced to the release position, and the movable rope gripping portion 35 can be displaced to the open position. Therefore, the returning operation after the trip operation of the governor 10 can be easily performed.

  The base 14 has a pair of support plates 16 and 17 that oppose each other, and the governor sheave 13, the engagement mechanism 30, the operation lever 38, and the rope gripping mechanism 31 include the support plate 16 and the support plate 17. Therefore, the width dimension of the speed governor 10 can be reduced, and the speed governor 10 can be reduced in size and weight. In addition, since the support plates 16 and 17 can have the same shape, a plurality of metal plates stacked on each other can be processed at the same time when the support plates 16 and 17 are manufactured, and the base 14 can be easily manufactured. It can be carried out.

Embodiment 2. FIG.
FIG. 15 is a longitudinal sectional view showing a speed governor 10 for an elevator according to Embodiment 2 of the present invention. FIG. 15 is a diagram corresponding to FIG. 6 in the first embodiment. FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG. In the figure, the engagement piece 27 for operation is provided with an engagement piece side inclined portion 71 that is inclined in a direction in which the operation lever 38 is guided to the ratchet 26 side by contact with the operation lever 38. That is, the engagement piece side inclined portion 71 is provided on the operation engagement piece 27 so that the portion closer to the ratchet 26 is located farther from the operation lever 38 than the portion closer to the support plate 16. ing. A portion of the support plate 16 facing the operating engagement piece 27 is a flat surface. Other configurations and operations are the same as those in the first embodiment.

  In such a speed governor 10, since the engagement piece side inclined part 71 inclined in the direction which guides the operation lever 38 to the ratchet 26 side is provided in the operation engagement piece 27, the operation lever 38 is operated. It is possible to prevent the operating lever 38 from escaping from the gap between the operating engagement piece 27 and the support plate 16 when being brought into contact with the operating engagement piece 27. Trip operation can be performed more reliably.

Embodiment 3 FIG.
FIG. 17 is a cross-sectional view of a main part of the speed governor 10 according to the third embodiment of the present invention. In the second embodiment, the inclined portion is provided only on the operating engagement piece 27, but the operating lever 38 may be provided with an inclined portion. In other words, the engagement piece side inclined portion 71 is provided at the contact portion of the operation engagement piece 27 with the operation lever 38, and the contact portion of the operation lever 38 with the operation engagement piece 27 is engaged. A lever side inclined portion 72 substantially parallel to the combined piece side inclined portion 71 is provided. That is, the lever-side inclined portion 72 is inclined in a direction in which the operating lever 38 is guided to the ratchet 26 side by contact with the operating engagement piece 27. Other configurations and operations are the same as those in the second embodiment.

  In such a speed governor 10, the lever side inclined portion 72 substantially parallel to the engaging piece side inclined portion 71 is provided in the contact portion of the operating lever 38 with the operating engagement piece 27. Ten tripping operations can be performed more reliably.

  In the second and third embodiments, the portion of the support plate 16 that faces the operating engagement piece 27 is a flat surface. However, as in the first embodiment, the operating engagement piece 27 is inserted. A groove portion may be provided in the support plate 16. If it does in this way, trip operation of governor 10 can be performed still more reliably.

Claims (6)

A base installed in the hoistway,
A sheave that is supported rotatably on the base and that has a governor rope wrapped around it, and that rotates according to the lifting speed of the car.
A ratchet provided with an engagement piece for operation and rotatable about the sheave shaft of the sheave;
There is a claw provided on the sheave so as to be rotatable between an operating position engaged with the ratchet and a release position where the engagement with the ratchet is released, and the rotational speed of the sheave is preset. An engaging mechanism for rotating the ratchet in the same direction as the sheave when the claw is rotated from the release position to the operating position when the set overspeed is reached;
The actuating lever that comes into contact with and displaces the actuating engagement piece by the movement of the actuating engagement piece by the rotation of the ratchet, and the actuating lever that comes into contact with the actuating engagement piece A rope gripping mechanism that is actuated by displacement to brake the governor rope,
A speed governor for an elevator, wherein the base is provided with a groove portion into which a part of the operating engagement piece is inserted and extending in a moving direction of the operating engagement piece. A base installed in the hoistway,
A sheave that is supported rotatably on the base and that has a governor rope wrapped around it, and that rotates according to the lifting speed of the car.
A ratchet provided with an engagement piece for operation and rotatable about the sheave shaft of the sheave;
There is a claw provided on the sheave so as to be rotatable between an operating position engaged with the ratchet and a release position where the engagement with the ratchet is released, and the rotational speed of the sheave is preset. An engaging mechanism for rotating the ratchet in the same direction as the sheave when the claw is rotated from the release position to the operating position when the set overspeed is reached;
The actuating lever that comes into contact with and displaces the actuating engagement piece by the movement of the actuating engagement piece by the rotation of the ratchet, and the actuating lever that comes into contact with the actuating engagement piece A rope gripping mechanism that is actuated by displacement to brake the governor rope,
An engagement piece side inclined portion that is inclined in a direction in which the operation lever is brought into contact with the operation lever and is guided to the ratchet side by contact with the operation lever. Governor. 3. The elevator according to claim 2, wherein a lever-side inclined portion that is substantially parallel to the engaging piece-side inclined portion is provided at a contact portion of the operating lever with the operating engagement piece. Speed governor. A base installed in the hoistway,
A sheave that is supported rotatably on the base and that has a governor rope wrapped around it, and that rotates according to the lifting speed of the car.
A ratchet provided with an engagement piece for operation and rotatable about the sheave shaft of the sheave;
There is a claw provided on the sheave so as to be rotatable between an operating position engaged with the ratchet and a release position where the engagement with the ratchet is released, and the rotational speed of the sheave is preset. An engaging mechanism for rotating the ratchet in the same direction as the sheave when the claw is rotated from the release position to the operating position when the set overspeed is reached;
The actuating lever that comes into contact with and displaces the actuating engagement piece by the movement of the actuating engagement piece by the rotation of the ratchet, and the actuating lever that comes into contact with the actuating engagement piece A rope gripping mechanism that is actuated by displacement to brake the governor rope,
The base is disposed around the sheave shaft, and is provided with an end portion of a return lever that is curved and molded so as to surround the sheave shaft,
The elevator speed governor, wherein the pawl is pushed up by the return lever rotated in a direction away from the sheave shaft, and is rotated from the operating position to the release position. . A link mechanism for interlocking the actuating lever and the return lever, and a remote control wire for displacing the link mechanism;
Due to the displacement of the link mechanism due to the operation of the remote control wire, the return lever is rotated in a direction in which the pawl is displaced from the operating position to the release position, and the operating lever is The elevator governor according to claim 4, wherein the governor is displaced in a direction in which the operation of the mechanism is released. A base having a pair of support plates facing each other;
A sheave arranged between the support plates, wrapped around a governor rope, and rotated according to the raising and lowering speed of the car;
A ratchet disposed between the support plates and rotatable about the sheave shaft of the sheave;
There is a claw provided on the sheave so as to be rotatable between an operating position engaged with the ratchet and a release position where the engagement with the ratchet is released, and the rotational speed of the sheave is preset. An engaging mechanism for rotating the ratchet in the same direction as the sheave when the claw is rotated from the release position to the operating position when the set overspeed is reached;
An operation lever disposed between the support plates and displaced by rotation of the ratchet, and a rope gripping mechanism disposed between the support plates and actuated by displacement of the operation lever to brake the governor rope. An elevator governor characterized by comprising:

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