Elevator device and safety gear device
A safety gear and elevator technology, which is used in transportation, packaging, elevators, etc., can solve the problems of increased friction, large size of safety gear, and difficulty in moving the movable part 3a, and achieves the effect of improving reliability.
Active Publication Date: 2016-10-19
HITACHI LTD
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Problems solved by technology
This will cause great frictional force between the movable part 3a and the fixed part 3b, which brings great difficulty to the movement of the movable part 3a.
Although this publication also discloses some improvement examples, in actual use, if there is a phenomenon such as mixing impurities between the movable part 3a and the fixed part 3b, the friction force between the two will be further increased, so that the movable part 3a and the fixed part 3b will be mixed. It is difficult to move smoothly between the part 3a and the fixed part 3b
[0006] In addition, in the above-mentioned technology, since the dimensional change of the wedge 3 in the direction perpendicular to the friction surface is achieved by the movable part 3a compressing the upper elastic body 10 and moving relative to the fixed part 3b, in order to ensure sufficient Dimensional change, the longitudinal dimension of the elastic body 10 must be increased so that the elastic body 10 has enough room for compression
This will cause the size of the safety gear to become very large
Method used
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[0020] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] figure 1 It is a schematic structural view schematically showing an embodiment of the elevator apparatus of the present invention. The elevator device includes a car 102, a guide rail 106, a safety gear device 200 and a speed governor not shown in the figure. The car 102 is lifted and lowered along the guide rail 106 under the traction of the hoist rope 104 . Two safety gear devices 200 are installed on the lower beam of the car 102 . When the downward speed of the car 102 exceeds the specified speed, the speed limiter acts, and the speed limiter rope stops moving, thereby driving the safety gear device 200 to act, and the safety gear device 200 clamps the guide rail 106 to stop the car from moving.
[0022] figure 2 It is a schematic structural view briefly showing an embodiment of the safety gear de...
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The present invention relates to a safety gear device which is relevant to an elevator device. The safety gear device comprises: a wedge (212); a press body (206) for pressing the wedge against a guide rail (106) by a resilient force of a spring (234) to form a braking force; and a braking-force adjusting mechanism (300). During operation of the safety gear device, the braking-force adjusting mechanism applies a force on the press body in a direction opposite to a pressing direction of the press body to reduce a pressing force of the press body, so as to adjust the braking force. In this way, reliable regulation of the pressing force is realized without the need of a complex wedge structure or other intermediate links, so as to avoid excessive deceleration during the post-braking phase.
Description
technical field [0001] The invention relates to an elevator device, in particular to a safety gear device of the elevator device. Background technique [0002] In order to ensure the safety of passengers, an overspeed protection device needs to be installed on the elevator device, and safety gear is one of them. When the car overspeeds, the wedge of the safety gear clamps the guide rail under the action of the lifting mechanism, and generates friction (braking force) between the guide rail and the brake arm under the pressure, thereby stopping the car. [0003] As introduced in Japanese Patent Publication No. 2001-192184, experiments have proved that when the sliding speed of an object is greater than 10 m / s, the coefficient of dynamic friction decreases with the increase of the sliding speed. On the usual safety gear, the brake spring exerts a certain pressing force on the wedge through the brake arm, and the braking force (friction force) is equal to the product of the fr...
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Inventor 座间秀隆平野薰
Owner HITACHI LTD