JP2006089174A - Governor for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a governor for an elevator possible to be accurately operated with simple structure and capable of preventing wrong operation of an inspecting part. <P>SOLUTION: This governor for an elevator is provided with an operation body 21 pivotally supported on the same shaft as a sheave 11 and having lock parts 24A to 24C, governor weights 15A and 15B provided with claw parts 18A and 18B on a side to be displaced to the outer diameter side by centrifugal force, a car stop switch 20 to be brought in contact with the claw part of the governor weight when elevating speed of a car 3 reaches a first set value, holding means 26, 27, 28, 30 and 31 for holding a governor rope when elevating speed reaches a second set value and the claw part of the governor weight is engaged with the lock part, an engaging means 33 provided in a peripheral position of the governor weight to be held in a waiting position in usual and to be displaced to an operation body side when performing maintenance work, and a lock means 40 provided in the engaging means to hold the engaging means in the waiting position in usual. <P>COPYRIGHT: (C)2006,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. In addition, the conventional speed governor is provided with an inspection lever for performing maintenance inspection and an inspection wire for operating the inspection lever remotely. For preventing malfunction of the inspection lever, This is not taken into account, and there is a possibility that the elevator lever may become inoperable due to erroneous operation of the inspection lever other than during inspection.

  An object of the present invention is to provide a speed governor for an elevator that can operate accurately with a simple configuration and can prevent an inspection portion from malfunctioning.

  In order to achieve the above object, the present invention provides a governor that pivots on an operating body coaxially with a sheave, and that is provided with a locking portion, and is displaced to the outer diameter side by centrifugal force due to the rotation of the sheave. A claw portion is provided on the outer diameter side of the weight, and the car is located at a position where it comes into contact with the claw portion of the governor weight that has been displaced to the outer diameter side by centrifugal force when the raising / lowering speed of the car reaches the first set value. A switch for stopping a car that operates a braking portion of a driving device that raises and lowers the vehicle, and the operating body is displaced to the outer diameter side when the raising / lowering speed of the car reaches a second set value. The claw portion of the weight is displaced by being engaged with the locking portion, and the gripping means for gripping the governor rope is driven to the gripping position by this displacement, and the outer peripheral position of the governor weight is in a normal state. Is held at the standby position and is displaced toward the actuator during maintenance and inspection. Engaging means, engaging the claw portion of the governor weight with the operating body via the engaging means at the time of maintenance and inspection, and providing the engaging means with a locking means. It is configured to be held at the standby position.

  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, the means for braking the governor rope can be operated, and as a result, an elevator governor that operates accurately with a simple configuration without requiring a precise configuration and assembly can be obtained. In addition, since the engaging means that is displaced during the maintenance inspection of the governor is normally held at the standby position by the lock means, the engagement means is prevented from malfunctioning except during the maintenance inspection, and the elevator operates. The situation where it becomes impossible can be avoided reliably.

  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 drive unit (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 speed 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 These governor weights 15A,
The governor weight 15A of 15B has the connecting rod 17 connected to the end of the small dimension a from the support pin 16A, and the claw part 18A is formed at the end of the large dimension b from the support pin 16A. 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 in contact with the boss portion of the sheave 11, and the governor weight 15A,
15B is held in a fixed position.

  The vertical portion 13V of the base 13 supports a car stop switch 20 for operating a braking portion 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 22C 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 fitted with a rope gripping spring 27 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 means 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 the 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. .

  And if the raising / 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, 18B of the governor weights 15A, 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 brake is operated to electrically stop the raising / 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 second 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. Next, whether the governor 12 functions normally. 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. Further, the operating piece 33 is inserted into a locking means for holding the operating piece 33 in the standby position at a normal time, for example, a through hole (not shown) formed in the operating piece 33 and formed on the maintenance arm 23. A pin 40 that is engaged with the groove 23a is provided.

  At the time of maintenance inspection, an operator first pulls out the pin 40 configured as described above, and releases the engagement between the operating piece 33 and the maintenance arm 23. Next, 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 at the time of 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, the emergency stop device 8 can be actuated to mechanically stop the car 3 as described above.

  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 operates accurately with a simple configuration without requiring a precise configuration and assembly. In addition, the operating piece 33 that is displaced at the time of maintenance and inspection of the governor is normally held at the standby position by the pin 40 that is a locking means, so that the operating piece 33 is prevented from malfunctioning at times other than during maintenance and inspection. The situation where the elevator becomes inoperable can be reliably avoided.

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 ... Actuation lever, 10 ... Speed governor rope, 11 ... Sheave, 12 ... Speed governor, 15A, 15B ... Governor weight 18A,
18B ... Claw part, 20 ... Car stop switch, 21 ... Actuator, 22A-22C ... Arm, 23 ... Maintenance arm, 24A-24C ... Locking part, 26 ... Grip arm, 27 ... Rope gripping spring, 28 ... Spring shaft, 30 ... shoe, 31 ... connecting lever, 33 ... working piece, 40 ... pin.

Claims (2)

  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 riding speed when the raising / lowering speed of the car reaches a first set value. An elevator control comprising a car stop switch for operating a braking portion of a driving device for raising and lowering the car, and a gripping means for gripping the governor rope when the lifting speed of the car reaches a second set value. In the speed machine, an operating body is provided coaxially with the sheave, the operating body has a locking portion, and the governor weight is provided with a claw portion on an outer diameter side, and the car stop switch Has a first ascending / descending speed of the car When reaching a fixed value, it is installed at a position where it comes into contact with the claw portion of the governor weight that has been displaced to the outer diameter side by centrifugal force. When the set value is reached, the claw portion of the governor weight displaced to the outer diameter side by centrifugal force is engaged with the engaging portion and displaced to drive the gripping means to the gripping position. The outer peripheral position is provided with an engaging means that is normally held at the standby position and displaced toward the operating body during maintenance and inspection, and the claw portion of the governor weight and the operating body via the engaging means during maintenance and inspection. And the engagement means further includes a lock means, and is configured to hold the engagement means at a standby position in a normal state. 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, a car stop switch for operating a braking portion of a driving device for raising and lowering the car when the raising and lowering speed of the car moving in the hoistway reaches a first predetermined value, and the governor rope A speed control for an elevator, comprising: a shoe that slides against and brakes the vehicle; and an actuating means that displaces the shoe to a braking position via a link means when the raising / lowering speed of the car reaches a second predetermined value. Before the machine The actuating means includes a claw portion provided on the governor weight, a frame that is pivotally supported by the shaft and connected to the link means, and has a plurality of arms, and is disposed outside the governor weight; The arm is provided with a locking portion that is provided on the outer diameter side of the arm and can contact the claw portion, and the claw portion is displaced to the outer diameter side when the raising / lowering speed of the car reaches a first predetermined value. Then, the car stop switch is turned on, and when the raising / lowering speed of the car reaches a second predetermined value, the claw part is displaced to the outer diameter side and comes into contact with the locking part to The shoe is displaced to the braking position via the frame, and is disposed at the lower part of the frame body. The shoe moves upward along the frame body and is displaced to the inspection position where it contacts the claw portion of the governor weight. An actuating piece that swings according to contact with the part and engages with the frame, and one end Wherein a wire to which the other end is connected to the operating piece is extended to the outer side, usually the elevator speed governor, characterized in that a locking means for holding at the standby position to the operating piece when.

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