Braking device or safety tongs for a lift cabin
A braking device, elevator car technology, applied in transportation and packaging, elevators, etc., can solve problems such as failure to produce emergency braking, elevator car tilt, guide rail damage, etc.
Active Publication Date: 2008-01-16
WITTUR
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AI Technical Summary
Problems solved by technology
But its disadvantage is that it fails to produce emergency braking when going up
[0012] This known solution also has the problem that, especially in the case of incorrect positioning of the guide rails, it may occur that the brake acts on the guide rails on one side, with the result that the elevator car may tilt and thus the guide rails severely damaged
Method used
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[0026] As shown in FIG. 2 , the guide rail 2 has a rail head 8 connected via a web 6 to a rail base 7 .
[0027] In the braking device or safety gear according to the invention, a braking element is provided in the form of a roller 9 with shoulders 11 on both end faces 10 of the roller (see FIG. 1 ). The outer peripheral surfaces of the rollers 9 function as friction surfaces 12 . To this end, it has a knurled structure or a friction plate, which is intended to abut against the guide rail 2 (cf. FIG. 2 ).
[0028] FIG. 2 shows the inventive braking device 14 in horizontal section. The braking device has a pressure body 19 which substantially corresponds to a U-shape, where the legs 16, 16' of the U-shape clamp the guide rail 2 in their free end regions.
[0029] On the leg 16 of the pressure body 19 there is a slot 20 into which the roller 9 is introduced. Furthermore, the slot 20 has a groove 21 which accommodates the friction surface 12 of the roller 9 (see FIG. 1 ).
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The invention relates to a braking or interception device for a lift cabin, which is guided in a shaft along vertical guide tracks (2). To permit a simple construction, the braking organ is configured by a roller (9), whose axis runs perpendicular to the longitudinal direction of the guide track (2) and whose outer surface is configured as a friction surface (12). Said roller is displaceably guided by stepped shoulders (11) in a gap (20) of a pressure body (19) that runs parallel to the associated guide track (2), said gap (20) having a groove (21), which runs nearer to the guide track (2) at least towards one end. The roller (9) is connected to an arresting organ and is pre-tensioned against the guide track (2) with the aid of a spring (28). When the arresting organ releases the roller (9), the latter (9) is pressed against the guide track (2) and rolls along the latter until it reaches the end of the groove (21), where it becomes firmly clamped, thus braking the lift cabin by friction.
Description
technical field [0001] The invention relates to a braking device or safety gear for an elevator car according to the preamble of claim 1 . Background technique [0002] The elevator is equipped with a braking device or a safety gear for stopping the elevator car at impermissible high speeds, which may occur, for example, in the event of a malfunction of the control device or a broken wire rope. [0003] In known arrangements of this type, a brake or safety gear is actuated by an overspeed governor fixedly installed in the hoistway or in the machine room, which will cause the overspeed governor to rotate when the elevator car is running. For this reason, be provided with a closed speed limiter rope, it walks around the speed limiter (usually at the highest position in the hoistway) at one end, and the other end walks around the tension pulley (usually at the lowest position in the hoistway). The speed-limiting rope is connected to the braking device or safety gear of the ele...
Claims
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IPC IPC(8): B66B5/22
CPCB66B5/22
Inventor 弗朗茨·约瑟夫·卡纳于尔根·卡纳
Owner WITTUR