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Elevator emergency brake

An emergency braking and elevator technology, which is applied in transportation, packaging, elevators, etc., can solve the problems of increasing the deflection of elastic bodies, increasing the size of elastic bodies, and large-scale emergency braking devices, so as to prevent large-scale Effect

Active Publication Date: 2016-11-30
HITACHI LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to reduce the pressing force of the leaf spring, it is necessary to increase the amount of deflection of the elastic body, so that there is a problem that the size of the elastic body increases and the size of the emergency brake device itself increases.

Method used

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  • Elevator emergency brake
  • Elevator emergency brake
  • Elevator emergency brake

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0057] Below, refer to Figure 3 to Figure 5 The emergency braking device of the first embodiment will be described.

[0058] image 3 It is a schematic diagram showing the emergency braking device of the elevator according to the first embodiment of the present invention. The emergency brake device 4 has: brake shoes 41, which are arranged in pairs on the left and right to clamp the guide rail 2; and a lifting part P, which is connected to a lifting rod not shown, and the lowering speed of the elevator car 1 exceeds When the predetermined speed limit is reached, the brake shoe 41 is brought into sliding contact with the guide rail 2. In addition, the emergency braking device 4 further has an inclined body 44 for guiding the brake shoe 41, a roller 45 provided between the brake shoe 41 and the inclined body 44, and an emergency braking device main body 46 for supporting these components. .

[0059] The brake shoe 41 has a friction surface 41b in contact with the guide rail 2 and ...

no. 2 example

[0073] Picture 11 It is a schematic diagram showing an emergency braking device for an elevator according to the second embodiment of the present invention. In the first embodiment, the elastic force releasing device R releases the elastic force of the elastic body by a so-called cam mechanism that uses the brake shoe 41 to move the inclined body.

[0074] On the other hand, in the second embodiment, the link mechanism L is adopted as the above-mentioned mechanism of the spring force releasing device R. After the second inclined body 47 is pressed upward by the locking portion 41c of the brake shoe 41, the third inclined body 48 is opened in the left-right direction via the link structure L, and the elastic body is opened by opening the third inclined body 48 42 is opened, thereby releasing the pressing of the brake shoe 41. For the sake of convenience, the second inclined body 47 and the third inclined body 48 are described using the form of the first embodiment, but in this e...

no. 3 example

[0076] Figure 12A with Figure 12B It is a schematic diagram showing an emergency braking device for an elevator according to a third embodiment of the present invention. In the present invention, the pressing force acting on the brake shoe by the divided elastic body as a whole is set to provide an appropriate braking force to the emergency brake device under the dynamic friction coefficient acting in the normal state. At this time, the elastic force of the elastic body that needs to be released is determined according to conditions such as braking speed and dynamic friction coefficient, so the division of the elastic body is as Figure 12A with Figure 12B Shown can be divided at any ratio.

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PUM

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Abstract

The present invention provides an emergency braking device for an elevator that can control the braking force at the time of braking within a range not exceeding a predetermined value without increasing the size. The emergency braking device of the elevator presses the brake shoe on the guide rail and slides the brake shoe on the guide rail to generate a braking force when the elevator car descends at a speed exceeding the speed limit, which has the following functions: The upper elastic body and the lower elastic body that apply the pressing force toward the guide rail of the brake shoe; the inclined body having the inclined surface opposite to the inclined surface provided on the opposite side of the guide rail of the brake shoe; the inclined surface provided on the brake shoe The roller between the surface and the inclined surface of the inclined body; and the main body of the emergency braking device supporting these components. It also has a second inclined body that expands the upper elastic body when the braking force exceeds a predetermined value, a third inclined body that has an inclined surface that opposes the inclined surface of the second inclined body, and a second inclined body that is provided on the second inclined body. The roller between the inclined surface of the inclined surface and the inclined surface of the third inclined body.

Description

Technical field [0001] The invention relates to an emergency braking device of an elevator. Background technique [0002] As a prior art, in an elevator, when the elevator car descends at a speed exceeding the speed limit due to an accident, in order to safely stop the elevator car at an appropriate deceleration, braking is performed by an emergency braking device. The emergency braking device is configured, for example, to sandwich a guide rail that guides the elevator car up and down by a brake shoe and an elastic body provided in the elevator car portion, and use the friction force generated between the guide rail and the brake shoe to apply the friction force to the elevator car. Brake. [0003] In the prior art, improvements have been made to various problems existing in the emergency braking device. For example, the friction between the guide rail and the brake shoe will change due to various reasons, and these changes will immediately appear as changes in the braking force...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/22
Inventor 座间秀隆远藤广基平野薰佐藤五郎礒谷仁加藤淳志
Owner HITACHI LTD