JP2005089118A - Governor for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a governor for an elevator generating no erroneous action even by a simple constitution. <P>SOLUTION: An operation body 21 pivotally supported on the same shaft as a sheave 11 and stationarily retained is provided and has engagement parts 24A-24C. Governor weights 15A, 15B displaced to an outer diameter side by centrifugal force by rotation of the sheave 11 are provided with claw parts 18A, 18B at a side displaced to the outer diameter side. A switch 20 for stopping a car is installed at a position where it is brought into contact with the claw part of the governor weight displaced to the outer diameter side by centrifugal force when lifting speed of the car 3 arrives at a first set value. Further, the operation body 21 is displaced by engaging the claw part of the governor weight displaced to the outer diameter side with an engagement part when the lifting speed arrives at a second set value. Gripping means (26, 27, 28, 30, 31) for gripping the governor rope are driven to a gripping position by the displacement. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a speed governor for an elevator, and in particular, when a moving speed of a car reaches a first set value, a car stop switch is turned on to electrically stop the car driving device, and the car. The elevator governor operates the emergency stop device and mechanically stops the elevator car when the ascending / descending speed reaches a second set value.

  Conventionally, for an elevator that electrically stops the car drive device when the elevator moving speed reaches the first and second set values, and mechanically stops the car by operating an emergency stop device. Patent Document 1 has already proposed a governor.

JP 2001-106454 A

  The conventional technology is configured to turn on the car stop switch by the displacement of the claw portion of the governor weight toward the outer diameter side when the elevator car's lifting speed reaches the first set value. However, the engagement configuration for activating the means for braking the governor rope when the elevator lifting / lowering speed reaches the second set value is located at the end opposite to the claw portion for inserting the car stop switch. It is the structure performed by the another nail | claw part provided. For this reason, when the raising / lowering speed of the car reaches the second set value, a means for accurately braking the governor rope using a slight displacement toward the inner diameter side of another claw portion must be operated. Don't be. As a result, there is a problem that a malfunction is likely to occur unless the engagement configuration of the governor weight with another claw portion is precisely manufactured and assembled, and the adjustment work becomes troublesome.

  An object of the present invention is to provide a governor for an elevator that does not cause malfunction even with a simple configuration.

  In order to achieve the above object, the present invention provides an operating body that is coaxially supported with a sheave and is held stationary, and this operating body has a locking portion and a centrifugal force generated by the rotation of the sheave. The governor weight that is displaced to the outer diameter side by the claw is provided on the side that is displaced to the outer diameter side, and is displaced to the outer diameter side by centrifugal force when the lifting speed of the car reaches the first set value. A car stop switch for operating a braking device of a driving device that drives the raising and lowering of the car is installed at a position in contact with the claw portion of the governor weight, and the operating body has a raising and lowering speed of the car. When the second set value is reached, the claw portion of the governor weight that has been displaced to the outer diameter side is engaged with the engaging portion and displaced, and the gripping means for gripping the governor rope is moved to the gripping position by this displacement. It was configured to drive.

  As described above, by providing the operating body with the engaging portion that engages when the claw portion of the governor weight is displaced to the outer diameter side, the displacement of the claw portion of the enlarged large governor weight can be accurately used. Thus, it is possible to actuate the means for braking the governor rope, and as a result, it is possible to obtain a governor for an elevator that does not cause malfunction even with a simple configuration without requiring a precise configuration and assembly. .

  An embodiment of an elevator governor according to the present invention will be described below with reference to FIGS.

  In general, as shown in FIG. 4, an elevator is a main rope in which a car 3 that moves up and down in a hoistway 2 provided in a building 1 and a counterweight 4 that is suspended from the car 3 on one side and connected to the other side. 5, a traction sheave 6 around which the main rope 5 is wound, a driving device (not shown) that drives the traction sheave 6 and includes a braking device, a guide rail 7 that guides the raising and lowering of the car 3, An emergency stop device 8 provided on the car 3 for gripping the guide rail 7 in an emergency, an operating lever 9 that drives the emergency stop device 8 and is pivotally supported on the car 3 side, and is connected to the operating lever 9 An endless speed governor rope 10 stretched over the entire range of the elevator lift in the hoistway 2, and a sheave 11 that is pivotally supported on the top of the hoistway 2 and wrapped around the speed governor rope 10. And a governor 12 provided.

  The speed governor 12 includes, for example, a base 13 fixed to the top of the guide rail 7, and a support shaft 14 that rotatably supports the sheave 11 is fixed to the base 13. ing.

  A pair of governor weights 15A and 15B are rotatably attached to the side portion of the sheave 11 by support pins 16A and 16B, and the pair of governor weights 15A and 15 are connected by a connecting rod 17 to perform the same movement. It is regulated to Of these governor weights 15A and 15B, the governor way 15A is connected to the connecting rod 17 at the end of the small dimension a from the support pin 16A, and the claw 18A is formed at the end of the large dimension b from the support pin 16A. ing. Further, one end of the balance spring 19 is connected to the governor weight 15B at the small dimension a end from the support pin 16B, and a claw 18B is formed at the large dimension b end from the support pin 16B. The other end of the balance spring 19 is brought into contact with the boss portion of the sheave 11 so as to hold the governor weights 15A and 15B in place.

  The vertical portion 13V of the base 13 supports a car stop switch 20 that operates a braking device of a driving device (not shown) when the raising / lowering speed of the car 3 reaches a first set value. The switch lever 20L protrudes toward the governor weights 15A and 15B.

  Further, the actuating body 21 is held stationary via a bearing (not shown) coaxially with the sheave 11 near the side portion of the sheave 11 where the governor weights 15A and 15B are supported. In the operating body 21, a plurality of arms 22A to 22C extend radially at equal angles, and a maintenance arm 23 extends from the support shaft 14 side in the outer diameter direction. The distal end portions of the arms 22A to 22 of the operating body 21 have the same radius and are bent so as to overlap the outer peripheral portions of the governor weights 15A and 15B to form the locking portions 24A to 24C. The locking portions 24A to 24C are engaged with the claw portions 18A and 18B of the governor weights 15A and 15B, which are displaced to the outer diameter side by centrifugal force when the raising / lowering speed of the car 3 reaches the second set value. It is provided in the position to do.

  One end of a gripping arm 26 is pivotally supported on the base 13 by a support pin 25. A spring receiver 26E is formed at the other end of the gripping arm 26, and a spring shaft 28, to which a rope gripping spring 27 is attached, passes through the spring receiver 26E so as to extend from the outer diameter side of the sheave 11 to the inner diameter side. . A spring seat 27 </ b> B that receives the end of the rope gripping spring 27 is provided on the outer diameter side of the spring shaft 28. Further, a shoe 30 that presses the governor rope 10 wound around the sheave 11 via a connecting pin 29 is supported on the gripping arm 26.

  The inner end side of the spring shaft 28 is connected via a connection lever 31 via a pin 32 of the arm 22B of the operating body 21. The gripping arm 26, the rope gripping spring 27, the spring shaft 28, the shoe 30, the connection lever 31 and the like constitute a gripping means for gripping the governor rope 10, and the gripping arm 26, the rope gripping spring 27, the spring shaft 28. The link lever is constituted by the connecting lever 31 and the like.

  Next, the operation of the governor 12 having the above configuration will be described. The sheave 11 is rotated as the governor rope 10 circulates in synchronization with the raising and lowering of the car 3. At this time, the governor weights 15 </ b> A and 15 </ b> B receive a centrifugal force corresponding to the rotational speed of the sheave 11, in other words, the lifting speed of the car 3 while rotating together with the sheave 11. When the lifting / lowering speed of the car 3 reaches a predetermined value or more, the governor weights 15A and 15B rotate about the support pins 16A and 16B against the balance spring 19, and the claw portions 18A and 18B are displaced to the outer diameter side. .

  Then, when the lifting / lowering speed of the car 3 reaches a first set value, for example, 1.3 times the rated speed for some reason, the claw portions 18A and 18B of the governor weights 15A and 15B are balanced by centrifugal force. The claw portions 18A and 18B come into contact with the switch lever 20L to actuate the car stop switch 20 and shut off the power source of the driving device for driving the car 3 against the spring 19. The braking device is actuated to electrically stop the raising and lowering of the car.

  On the other hand, for example, when the car 3 is lowered by cutting the main rope 5 and the descending speed reaches a first set value, for example, 1.4 times the rated speed, the sheave 11 corresponding to this speed rotates. The claw portions 18A and 18B of the governor weights 15A and 15B are further displaced to the outer diameter side by the centrifugal force generated by the above. Due to this displacement, the claw portions 18A and 18B engage with the locking portions 24A to 24C at the tips of the arms 22A to 22C of the operating body 21 to rotate the operating body 21 in the same direction as the sheave 11 rotation direction. . By the rotation of the operating body 21, the connecting lever 31 connected to the arm 22B is pulled in the rotating direction, and the gripping arm 26 penetrating the spring shaft 28 is rotated counterclockwise around the support pin 25. . By the rotation of the gripping arm 26, the shoe 30 presses the governor rope 10 wound around the sheave 11 and stops the movement of the governor rope 10.

  By stopping the governor rope 10 and further lowering the car 3, the operating lever 9 on the car 3 side is pulled up. When the operating lever 9 is pulled up, the emergency stop device 8 provided on the car 3 is actuated to strongly grip the guide rail 7 and mechanically stop the car 3.

  By the way, the above explanation is the operation in the normal operation of the car 3 and when the ascending / descending speed reaches the first and second set values. A case where maintenance work for inspection is performed will be described.

  First, at a position facing the maintenance arm 23 of the operating body 21 of the base 13, it is normally held at a standby position not engaged with the claw portions 18A, 18B of the governor weights 15A, 15B. An operating piece 33 is provided as an engaging means that is displaced to the arm 23 side. The operating piece 33 is configured to be operated from the elevator hall or the ceiling of the car 3 by an operating tool such as a wire 34 and to be displaced in the rotational direction of the sheave 11 when the car 3 is lowered.

  As shown in FIG. 3, the operating piece 33 configured as described above is raised along the maintenance arm 23 to a position where it engages with the claw portions 18A and 18B of the governor weights 15A and 15B during maintenance and inspection. When the car 3 is lowered at a low speed in this state, the claw portions 18A and 18B of the governor weights 15A and 15B are engaged with the operating piece 33, and when the car 3 is further lowered, the operating piece 33 is moved to the maintenance arm 23. And the operating body 21 is rotated. By rotating the operating body 21, the connection lever 31-the gripping arm 26 is driven and the shoe 30 is pressed against the governor rope 10 wound around the sheave 11 to stop the movement of the governor rope 10. By stopping the movement of the governor rope 10, as described above, the emergency stop device 8 can be operated to mechanically stop the car 3.

  In addition, immediately before the shoe 30 is pressed against the speed governor rope 10 of the sheave 11 by the rotation of the operating body 21, the locking portion 24B of the arm 22B of the operating body 21 is engaged with the switch lever 20L. The gap between the shoe 30 and the governor rope 10 is made larger than the gap between the locking portion 24B of the operating body 21 and the switch lever 20L so that the stop switch 20 is operated.

  As described above, according to the present embodiment, the locking portions 24A to 24C of the operating body 21 are disposed on the outer diameter side of the claw portions 18A and 18B of the governor weights 15A and 15B. The displacement of the claw portions 18A and 18B of the governor weights 15A and 15B due to the centrifugal force can be enlarged, and the actuating body 21 that accurately brakes the governor rope 10 is operated using the enlarged large displacement. As a result, it is possible to obtain an elevator governor that does not cause malfunction even with a simple configuration without requiring a precise configuration and assembly.

The front view which shows one Embodiment of the governor for elevators by this invention. The front view which removed the operation body in FIG. The front view which shows the state at the time of the maintenance inspection of FIG. Schematic which shows the elevator to which the governor for elevators by this invention is applied.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Building, 2 ... Hoistway, 3 ... Car, 8 ... Emergency stop device, 9 ... Actuating lever, 10 ... Rope for speed governor, 11 ... Sheave, 12 ... Speed governor, 15A, 15B ... Governor Weight: 18A, 18B: Claw, 20: Switch for stopping the car, 21: Actuator, 22A-22C: Arm, 23: Maintenance arm, 24A-24C: Locking part, 26: Holding arm, 27: Rope gripping Spring, 28 ... Spring shaft, 30 ... Shoe, 31 ... Connection lever, 33 ... Operating piece.

Claims (4)

  A governor rope that is driven by a car that moves up and down in a hoistway provided in the building, a sheave that is wound around the governor rope and supported by the building, and a rotation of the sheave A governor weight that is displaced to the outer diameter side by a centrifugal force generated by the motor, a balance spring that urges the governor weight in a direction against the centrifugal force, and the governor when the lifting speed of the car reaches a first set value. A car stop switch for operating a braking device of a driving device that is inserted through a weight and drives the raising and lowering of the car, and when the raising and lowering speed of the car reaches a second set value, via the governor weight An elevator governor comprising a gripping means for gripping the governor rope to be driven is provided with an operating body that is supported coaxially with the sheave and is held stationary. And the gas The weight is provided with a claw portion on the outer diameter side, and the car stop switch is displaced to the outer diameter side by a centrifugal force when the raising / lowering speed of the car reaches the first set value. The actuating body is installed at a position where it comes into contact with the claw portion of the governor weight, and the operating body is moved to the outer diameter side by a centrifugal force when the raising / lowering speed of the car reaches a second set value. An elevator governor configured to engage and displace a claw portion of the displaced governor weight with a locking portion to drive the gripping means to a gripping position.   Engagement means that is normally held at a standby position and is displaced toward the working body during maintenance inspection is provided at the outer peripheral position of the governor weight, and a claw portion of the governor weight is provided via the engagement means during maintenance inspection. The elevator governor according to claim 1, wherein the governor is configured to engage with the operating body.   A base installed in the hoistway, a sheave on which a governor rope that is rotatably supported by the base via a shaft and operates an emergency stop device is wound, and the sheave is rotated. A pair of governor weights that can be attached and displaced by a centrifugal force generated by rotation of the sheave; a connecting rod that connects the pair of governor weights to each other; and a balance that biases the governor weight in a direction against the centrifugal force. A spring and a braking device of a driving device that drives the raising and lowering of the car, which is input through the governor weight when the raising and lowering speed of the car moving in the hoistway reaches a first predetermined value. A switch for stopping the car, a shoe slidingly contacting and braking the governor rope, and the shoe to the braking position via the link means when the raising / lowering speed of the car reaches a second predetermined value. Displacement operation In the elevator governor comprising the step, the actuating means includes a claw portion provided in the governor weight, a shaft supported by the shaft and connected to the link means, and a plurality of arms. A frame disposed outside the governor weight; and a locking portion that is provided on the outer diameter side of the arm and can be brought into contact with the claw portion, and the raising / lowering speed of the car is a first predetermined value. The claw part is displaced to the outer diameter side when the car reaches the position, and the car stop switch is turned on, and the claw part is moved to the outer diameter side when the raising / lowering speed of the car reaches a second predetermined value. The elevator governor is characterized in that the shoe is displaced into contact with the locking portion and the shoe is displaced to the braking position via the link means. It is arranged at the lower part of the frame body, moves upward along the frame body and displaces to an inspection position where it comes into contact with the claw portion of the governor weight, and swings according to contact with the claw portion at this inspection position. The elevator control according to claim 3, further comprising: an operating piece that engages with the frame body; and a wire having one end connected to the operating piece and the other end extending to the outside. Speed machine.

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