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Elevator speed limiter

A speed limiter and elevator technology, applied in elevators, transportation and packaging, etc., can solve problems such as large-scale gantry, unreliable movement of the speed limiter, troublesome restoration of the speed limiter, etc.

Inactive Publication Date: 2009-12-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in this conventional speed governor of an elevator, since the locking release projection simply extends from the side of the ratchet wheel, for example, when the ratchet wheel is slowly rotated during an operation confirmation test of the speed governor, etc. , when the hook member is released from the locking projection, the ratchet and the hook member may elastically deform
In this case, the hook member is disengaged from the locking projection, and there is a problem that the overspeed governor cannot operate reliably.
[0006] In addition, since there is no mechanism for releasing the operation of the rope clamping mechanism or the engagement between the pawl and the ratchet after the operation of the speed governor, it is very troublesome to restore the operation of the speed governor.
[0007] In addition, since the shape of the frame is very complicated to support the sheave or the rope clamping mechanism, the frame may be made of casting or section steel, which increases the size of the frame and hinders the weight reduction of the speed governor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] figure 1 It is a block diagram showing the elevator according to Embodiment 1 of the present invention. In the drawing, a traction machine 4 for raising and lowering a car 2 and a counterweight 3 is installed in the upper part of the hoistway 1 . A deflector pulley 5 is provided near the traction machine 4 . The traction machine 4 includes a traction machine main body 6 having a motor, and a drive sheave 7 rotated by the traction machine main body 6 . A main rope 8 for suspending the car 2 and the counterweight 3 is wound around the drive sheave 7 and the deflection sheave 5 . The car 2 and the counterweight 3 are driven up and down in the hoistway 1 by the drive of the traction machine 4 .

[0032] A mechanical emergency stop device 9 is attached to the lower part of the car 2, and the emergency stop device 9 engages with a guide rail (not shown) to stop the car 2 in an emergency. A speed limiter 10 is provided in the upper part of the hoistway 1 . A tension pulle...

Embodiment approach 2

[0071] Figure 15 It is a vertical sectional view showing the speed governor 10 of an elevator according to Embodiment 2 of the present invention. in addition, Figure 15 is corresponding to that in Embodiment 1 Figure 6 diagram. in addition, Figure 16 is along Figure 15 Sectional view of line XVI-XVI in. In the figure, on the working engaging member 27, an engaging member inclined portion 71 is provided, and the engaging member inclined portion 71 is inclined in such a direction that the operating rod 38 is guided by abutting against the operating rod 38. Ratchet 26 sides. That is, the engaging member-side inclined portion 71 is provided on the engaging frame 27 for operation, and its portion near the ratchet wheel 26 is further away from the operating rod 38 than the portion near the support plate 16 . A portion of the support plate 16 that faces the work engagement piece 27 is a flat surface. Other structures and operations are the same as those in Embodiment 1. ...

Embodiment approach 3

[0074] Figure 17 It is a sectional view of main parts of the elevator speed governor 10 according to Embodiment 3 of the present invention. In Embodiment 2, the inclined portion is provided only on the engagement member 27 for operation, but the inclined portion may also be provided on the lever 38 for operation. That is, the engaging member side inclined portion 71 is provided on the part of the working engaging member 27 that contacts the working rod 38 , and the engaging member is provided on the part of the working rod 38 that contacts the working engaging member 27 . The side slopes 71 are substantially parallel to the rod side slopes 72 . That is, the lever-side inclined portion 72 is inclined in a direction that guides the lever 38 for operation to the side of the ratchet 26 by abutting against the engaging member 27 for operation. Other structures and operations are the same as those in Embodiment 2.

[0075] In such an overspeed governor 10, the rod-side inclined ...

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PUM

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Abstract

A speed governor of an elevator, wherein a pulley around which a speed governor rope is wrapped and rotatably supported on a base. A latchet has an engagement piece for operation and rotatable about a pulley shaft for the pulley is supported on the base. The pulley comprises an engagement mechanism having a claw engaged with the ratchet when the rotational speed of the pulley reaches a set overspeed and rotating the ratchet in the same direction as the pulley. A rope gripping mechanism for braking the speed governor rope is disposed on the underside of the pulley. An operation lever displaceably pressed by the engagement piece for operation to operate the rope gripping mechanism is connected to the rope gripping mechanism. A groove part in which a part of the engagement piece for operation is inserted and extending in the moving direction of the engagement piece for operation is formed in the base.

Description

technical field [0001] The present invention relates to a speed governor of an elevator, which is used to detect the overspeed of a car or a counterweight and activate an emergency stop device. Background technique [0002] Conventionally, there has been proposed a governor of an elevator in which a sheave around which a governor rope is wound and a rope clamping mechanism for clamping the governor rope are supported by a stand. The rope clamping mechanism is arranged under the rope wheel. A ratchet that rotates coaxially with the sheave is also supported on the stand. A pawl is provided on the sheave, and the pawl engages with the ratchet when the rotational speed of the sheave reaches a predetermined overspeed. The ratchet rotates together with the sheave by the engagement of the pawl and the ratchet. [0003] In addition, a hook member is connected to the rope clamping mechanism. Normally, the hook member is locked with the locking protrusion fixed on the stand. On t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/04
CPCB66B5/044
Inventor 加藤久仁夫
Owner MITSUBISHI ELECTRIC CORP