JP4764657B2 - Elevator governor - Google Patents

Description

  The present invention relates to a governor for an elevator.

  Conventionally, various elevator governors have been proposed. For example, Patent Document 1 described below describes a disk-type speed governor in which a wedge part that has been dropped is pressed by the elastic force of a coil spring and a governor rope is gripped between gripping pieces.

JP 55-26140 (Fig. 5 etc.)

  However, since the speed governor described in Patent Document 1 uses a coil spring, the mechanism for gripping the governor rope is increased in size, and the speed governor for the elevator tends to be increased accordingly.

  An object of the present invention is to provide an elevator governor that can be easily downsized.

In order to achieve the above object, according to the present invention, a shaft-supported governor pulley around which a governor rope moving in conjunction with a car is wound, and a claw portion is formed on the outer diameter of the pulley by centrifugal force accompanying the rotation of the pulley. A wedge portion that grips the governor rope between a pendulum that moves to the side, an engagement piece that rotates by contact with the moved claw portion to release the switch, and a gripping piece that rotates by its own weight and faces each other An elevator governor comprising: a lever that rotates by releasing contact with the claw portion that has further moved to the outer diameter side of the pulley and releases the support of the wedge portion; by the elastic force, the wedge portion configured to press to the governor rope, the wedge part 2 is provided, when the car has become overrunning state of the decreasing direction, one of the wedge portion is the Gabanaro A first hook that grips the governor rope, and the hook is rotated by contact with the claw when the car is in an overspeed state in the ascending direction. A second hook that releases the support of the one wedge portion by the clockwise rotation of the first hook, and a support of the other wedge portion by the counterclockwise rotation of the first hook. A third hook, and the engagement piece is rotatable by contacting the claw portion, and when the overspeed state is reached, the first hook is brought into contact with the claw portion and falls down, and the lever Is provided so as to be turned over when the wedge part falls and to become a stick for the first hook.

  ADVANTAGE OF THE INVENTION According to this invention, the governor for elevators with easy size reduction can be provided. In particular, the effect is remarkable when it is necessary to grip the governor rope in the overspeed state in both the upward and downward directions of the car.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 6 is a schematic configuration diagram showing the relationship between the elevator and the governor 6. In FIG. 6, a car 1 and a counterweight 2 are connected by a main rope 3, and the main rope 3 is wound around a hoisting machine 4 and a pulley 5. An endless governor rope 7 is wound around the pulley of the governor 6, and a governor weight pulley 8 is provided at the lower end of the governor rope 7. A frame 9 and a part of the governor rope 7 of the car 1 are grasped via a catch lever 10 of a safety device (not shown), and the pulley of the governor 6 is driven to rotate at the speed of the car 1 in normal operation. When a predetermined overspeed is detected for some reason, the catch lever 10 is operated by the governor rope 7 to operate the safety device, and in the downspeed, the car 1 is emergency stopped and the ascending direction It is configured to decelerate or stop at overspeed.

  In the above configuration, the structure of the governor 6 of the present invention will be described with reference to FIGS. 1 is a front view of the governor 6 during normal operation of the elevator, FIG. 2 is a partial cross-sectional view showing a spring portion of the cross-section XX of FIG. 1, and FIG. 3 is a hook of the cross-section XX of FIG. It is a fragmentary sectional view which shows a part.

  As shown in FIG. 1, the speed governor 6 of the present invention includes a governor pulley shaft 12 fixed to a frame 11 and a governor pulley 13 attached to the pulley shaft 12 via a bearing (not shown). The speed governor 6 includes a pendulum receiver 14 fixed on the shaft of the governor pulley 13, rotation fulcrums 15, 15 A, pins 16, 16 A, two pendulums 18, 18 A coupled by a connecting lever 17, and a pendulum opening. A spring 19 for determining the amount, a nut 20 for guiding the spring 19 and adjusting the spring force, and an adjuster 20A comprising a screw, and a pin 21 for the adjuster 20A are provided. Further, the speed governor 6 has a switch 22 fixed to the frame 11, a switch piece 23 having a switch piece 23 that can rotate with respect to the governor pulley shaft 12, a pin 29 on which the switch cam 24 rides, and a frame 11A (see FIG. 3). ) And three hooks (a first hook 26, a second hook 27, and a third hook 28) that are coaxially disposed on the shaft 25.

The second hook 27 and the third hook 28 are provided with screws 30 and 30A so as to sandwich the first hook 26 from both ends. The speed governor 6 includes pins 33 and 33A on which the wedge portions 31 and 31A, the shafts 32 and 32A serving as the rotation fulcrums of the wedge portions 31 and 31A, the second hook 27, and the third hook 28 are applied. The wedge portions 31, 31A are provided with pins 34, 34A. The levers 35 and 35A are pins 36 fixed to the frame 11A (see FIG. 3).
It is attached so as to be rotatable around 36A, and a moment acts in the direction shown in the figure by its own weight during elevator normal operation.

  Furthermore, the speed governor 6 is provided with gripping pieces 37, 37A and contact plates 38, 38A, and spacers 39, 39A are arranged between the gripping pieces 37, 37A and the contact plates 38, 38A. .

  Between the wedge part 31 and the wedge part 31A, spring receivers 40, 41, 42 are provided, and a plurality of disc springs 43 are arranged between the spring receivers 41, 42. In FIG. 2, eight disc springs are alternately arranged. The spring receivers 41 and 42 have screws, and the amount of compression of the disc spring 43 can be changed by turning the spring receiver 41, so that the spring force of the disc spring 43 can be adjusted.

  The first hook 26, the second hook 27, the third hook 28, and the wedge portions 31, 31A are configured as shown in FIG. The levers 35 and 35A and the pins 36 and 36A are not detached by the retaining rings 44 and 44A. The stoppers 45 and 45A limit the rotation range of the levers 35 and 35A.

  Next, the operation of the governor 6 will be described. FIG. 4 shows the case where the car 1 is overspeeded in the upward direction and the governor pulley 13 is overspeeded in the counterclockwise direction and reaches the switch-off operation. In FIG. 5, the overspeed further proceeds and the governor rope 7 is gripped. The case where the operation to be performed is reached is shown.

  First, in FIG. 4, the pendulum 18, 18 </ b> A is opened by the centrifugal force accompanying the rotation of the governor pulley 13, and the claw portions 46, 46 </ b> A at the tip of the pendulum 18, 18 </ b> A move to the outer diameter side of the governor pulley 13. When the speed reaches a certain speed, the claw portions 46, 46A come into contact with the switch piece 23, and the switch 22 and the switch cam are rotated counterclockwise to kick the switch 22 so that the switch 22 It becomes a release state. At this time, since the first hook 26 is still in contact with the claw portions 46 and 46A, the first hook 26 remains inverted.

When the overspeed further progresses, the pendulum 18, 18A further opens, and the claw portions 46, 46A further move toward the outer diameter side of the governor pulley 13, the claw portions 46, 46A come into contact with the first hook 26 as shown in FIG. The first hook 26 is kicked down and rotated clockwise about the shaft 25. Since the first hook 26 rotates the second hook 27 counterclockwise about the shaft 25 via the screw 30A, the engagement between the second hook 27 and the pin 33 is released, and the wedge portion 31 is supported. Canceled. The wedge portion 31 is rotated by being dropped counterclockwise about the shaft 32 by its own weight, and the governor rope 7 is sandwiched between the gripping pieces 37 facing each other. At this time, since the shaft 32 moves rightward as shown in FIG. 5, the wedge portion 31 is pressed against the governor rope 7 by the elastic force of the disc spring 43, and the governor rope 7 is gripped between the wedge portion 31 and the gripping piece 37. The The gripping force at this time is determined by the frictional characteristics between the elastic force of the disc spring 43 and the governor rope 7 contact portion (the wedge portion 31 and the gripping piece 37). Further, when the wedge portion 31 falls, the pin 34 rotates the lever 35 counterclockwise around the pin 36. As a result, the lever 35 is in the state shown in FIG. 5 and is in a position to support the lower portion of the first hook 26.

Thus, by using the disc spring 43, the mechanism for gripping the governor rope 7 can be made smaller than in the case of using a coil spring. Further, a disc spring 43 is arranged between the wedge portions 31, 31A, and one end side of the disc spring 43 is supported by one wedge portion 31, and the other end side of the disc spring 43 is supported by the other wedge portion 31A. Each gripping force can be obtained from the common disc spring 43, and a small speed governor 6 can be realized with a simple governor rope holding structure. Therefore, in order to hold the governor rope 7 not only in the overspeed state in the descending direction of the car 1 but also in the overspeed state in the ascending direction, even if the disc type governor provided with two wedge portions is used as a whole. Can be downsized.

  In the present invention, when the wedge part 31 falls, the pin 34 tilts the lever 35 in the counterclockwise direction as shown in FIG. 5, so that the first hook 26 is tilted in the clockwise direction and the first hook 26 Play the role of a stick. As a result, the switch cam 24 slips off from the pin 29, so that the switch 22 is surely cut off, and the switch 22 is reset unless the first hook 26, the second hook 27, and the wedge portion 31 are manually returned to the original state. I can't let you. In this way, when the wedge part 31 falls, it is possible to reliably maintain the state in which the switch 22 is turned off, so that a safe elevator system can be constructed.

  Even when the car 1 overspeeds in the upward direction and the governor pulley 13 overspeeds clockwise, the switch-off operation is performed when the governor pulley 13 reaches a predetermined rotational speed. When the speed of the car 1 further increases, an operation of gripping the governor rope 7 is performed between the wedge portion 31A and the gripping piece 37A. Thus, when the car 1 is in the overspeed state in the descending direction, one wedge portion 31 grips the governor rope 7, and when the car 1 is in the overspeed state in the ascending direction, The wedge portion 31 </ b> A is configured to grip the governor rope 7.

The front view which shows 1st Embodiment of the governor for elevators by this invention. The fragmentary sectional view of the governor for elevators by this invention. The partial top view of the governor for elevators by this invention. The front view at the time of switch operation | movement of the governor for elevators. The front view at the time of gripping of the governor rope of the governor for elevators. The schematic block diagram which shows the relationship between an elevator and a governor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Balance weight, 3 ... Main rope, 4 ... Hoisting machine, 5 ... Pulley, 6 ... Speed governor, 7 ... Governor rope, 8 ... Governor weight pulley, 9 ... Frame, 10 ... Catch Lever, 11, 11A ... frame, 12 ... governor pulley shaft, 13 ... governor pulley, 14 ... pendulum receiver, 15, 15A ... rotation fulcrum, 16, 29A, 21, 29, 33, 33A, 34, 34A, 36, 36A ... pin 17 ... connecting lever, 18, 18A ... pendulum, 19 ... spring, 20 ... nut, 20A ... adjuster, 22 ... switch, 23 ... switch piece, 24 ... switch cam, 25, 32, 32A ... shaft, 26 ... first Hook, 27 ... second hook, 28 ... third hook, 30, 30A ... screw, 31, 31A ... wedge portion, 35, 35A ... lever, 37, 37A ... gripping piece, 38, 38A ... , 39,39A ... spacer, 40, 41, 42 ... spring receiving, 43 ... disc spring, 44,44A ... snap ring, 45,45A ... stopper, 46,46A ... claws.

Claims (2)

A shaft-supported governor pulley around which a governor rope that moves in conjunction with the carriage is wound, a pendulum in which the claw portion moves to the outer diameter side of the pulley by the centrifugal force accompanying the rotation of the pulley, and the claw portion that has moved The wedge piece that grips the governor rope between the engagement piece that is rotated by contact with the release piece to release the switch, and the holding piece that is rotated by its own weight and is opposed, and further moved to the outer diameter side of the pulley In the elevator governor comprising a hook that rotates by releasing contact with the claw portion and releases the support of the wedge portion, and a lever ,
The wedge portion is configured to be pressed against the governor rope by the elastic force of a disc spring. When the two wedge portions are provided and the car is in an overspeed state in the descending direction, one wedge portion is When the governor rope is gripped and the car is in an overspeed state in the upward direction, the other wedge portion grips the governor rope,
The hook includes a first hook that rotates by contact with the claw portion, a second hook that releases support of the one wedge portion by clockwise rotation of the first hook, and the first hook. A third hook for releasing the support of the other wedge portion by turning counterclockwise
The engagement piece is rotatable in contact with the claw portion,
When the overspeed state occurs, the first hook comes into contact with the claw portion and falls down,
The speed governor for an elevator according to claim 1, wherein the lever is provided so as to fall down when the wedge part falls and to serve as a replacement rod for the first hook . The elevator governor according to claim 1 , wherein one end side of the disc spring is supported by the one wedge portion, and the other end side of the disc spring is supported by the other wedge portion.

Images