Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
  • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
  • B66B5/185—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on main ropes or main cables
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
  • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
  • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
  • B66D5/16—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes for action on ropes or cables

Definitions

• the invention relates to a rope brake for an elevator for stopping a rope strand by means of brake plates acting on the rope strand, a trigger mechanism initiating the braking process and springs generating the braking force of the brake plates, which can be reset to the starting position by means of a reset mechanism after the braking process.
• a rope brake is known from patent EP 0 651 724 B1, in which the support ropes run between two brake plates.
• One brake plate is fixed to the brake housing, the other brake plate can be actuated by means of a U-bracket, the U-bracket being connected by means of an axis guided on a control cam.
• the axle can be unlocked electromagnetically, the axle being moved along the control cam by means of compression springs and the actuatable brake plate pressing the supporting cables against the fixed brake plate.
• the axis is reset by means of a hydraulic cylinder.
• a disadvantage of the known device is that the cable brake is complex.
• Trigger mechanism the axis guided along control cams, the reset device and the brake housing are expensive to manufacture and time-consuming to assemble.
• the invention seeks to remedy this.
• the invention as characterized in claim 1, solves the problem of avoiding the disadvantages of the known device and of creating a simple and reliable rope brake.
• the advantages achieved by the invention are essentially to be seen in the fact that the rope brake is triggered by gravity.
• the trigger mechanism can thus be constructed in a significantly simplified manner. A mass element subjected to gravity suddenly releases the rope brake, which improves the reliability of the release.
• Another advantage is the simple reset mechanism with two functions.
• the cable brake can be made ready for operation again after a trip by means of the reset mechanism.
• the compression springs can be preloaded differently depending on the load or speed of the elevator car.
• the simply constructed rope brake can be easily retrofitted and is practically maintenance-free and does not require any energy.
• the rope brake can be installed with little effort and essentially without interfaces.
• FIG. 4 shows a section A of the cable brake in the event of a release
• Fig. 10 shows a variant of the rope brake with vertical rope course
• Fig. 1 shows a schematic representation of an elevator system with the inventive
• An elevator car 1 with doors 2 that can be moved in an elevator shaft (not shown) is connected by means of a cable strand 3 to a counterweight 4 that can be moved in the elevator shaft.
• An electric motor 5 drives an input shaft 6 of a transmission 7.
• a traction sheave 9 driving and supporting the cable strand 3 is arranged on an output shaft 8 of the transmission 7.
• Gear 7 has, for example, a worm 7.1 arranged on the input shaft 6 and a worm wheel 7.2 arranged on the output shaft 8. Other types of gear such as a spur gear are also conceivable.
• a service brake 10 is provided at the gear end of the input shaft 6.
• a first encoder 11 for detecting the speed of the input shaft 6 is arranged at the motor end of the input shaft 6.
• a second encoder 12 for detecting the rotational speed of the output shaft 8 is arranged on the drive wheel end of the output shaft 8.
• the second encoder 12 as shown with a broken line, can detect the speed of the traction sheave 9 or the movement of the cable strand 3 instead of the speed of the output shaft 8.
• the signals from the encoders 11, 12 are fed to evaluation electronics 13 which, depending on the result of the evaluation, interrupts a safety circuit 14 of an elevator control (not shown) and / or activates a cable brake 15.
• Evaluation electronics 13 and encoders 11, 12 form a detector for monitoring the speed of the input shaft 6 and the output shaft 8 and for generating actuator signals for the cable brake 15, for example.
• Fig. 2 shows the basic structure of the rope brake 15 with a vertical rope course.
• the cable brake 15 consists of a housing 16 on which a first brake plate 17 is fixedly arranged and of a second brake plate 18 which is movably arranged in the housing 16. In normal operation, the cable strand 3 runs between the brake plates 17, 18. The cable strand 3 is held in a plane spanned by the brake plates 17, 18 by means of a clamp 19 arranged above the elevator car.
• a first pressure plate 21 provided with a pin 20 is arranged on the second brake plate 18.
• the pins 20 carry compression springs 22 which are clamped between the first pressure plate 21 and a second pressure plate 23 which can be displaced in the housing 16.
• the second pressure plate 23 can be displaced along the path designated w by means of a screw 24 rotatably arranged on the housing 16 and a nut 25 arranged on the second pressure plate 23, the compression springs 22 being pretensioned depending on the position of the second pressure plate 23.
• el the compression springs 22 are relaxed, the first pressure plate 21 and release rods 26 acting on the first pressure plate 21 being movable into their starting position and latching with the nose 32.
• the trigger rods 26 are guided on the housing 16 and connected at the ends opposite the first pressure plate 21 by means of a crossbar 27.
• the screw 24 on a screw head 29 is turned until the second pressure plate 23 has reached its working position. Screw 24 with screw head 29 and nut 25 form the reset mechanism RM.
• the second pressure plate 23 can be moved into the end position labeled e2.
• the working position of the second pressure plate 23 is depending on the compression springs 22, on the elevator car 1 and its load and on the nominal speed of the elevator car 1.
• the first release lever 28 consists of a first leg 30 and a second leg 31 with nose 32, the first release lever 28 being rotatably mounted on a first axis 33.
• the nose 32 latches with the crossbar 27.
• the position of the crossbar 27 can be monitored by means of a sensor 34, for example by means of a limit switch.
• a sensor 34 for example by means of a limit switch.
• an electromagnet 36 Arranged on a holding bracket 35 is an electromagnet 36, which holds a mass element 37 in the activated state. Retaining bracket 35, electromagnet 36, mass element 37, guide rods 38 and first release lever 28 form the release mechanism AM.
• FIG. 3 shows the rope brake 15 in normal operation.
• the nose 32 is locked with the crossbar 27.
• the cable strand 3 runs freely between the brake plates 17, 18.
• Fig. 4 shows the position of the nose 32 after the impact of the mass element 37 on the first leg 30 of the first release lever 28.
• the cross bar 27 is released, the braking of the cable strand 3 is shortly before.
• 5 shows the position of the crossbar 27 after the compression springs 22 have pressed the second brake plate 18 onto the cable strand 3.
• FIG. 7 and Fig. 8 show the basic structure of the rope brake 15 with an inclined course of the rope.
• FIG. 9 shows a spatial representation of the rope brake according to the invention with an inclined rope course. The course of the rope is inclined at an angle n with respect to the vertical (perpendicular). With the guide rods 38 arranged vertically, the functioning of the mass element 37 is retained. In the event of triggering, the mass element 37 encounters a second trigger lever 39 which is rotatably mounted on a second axis 40 and actuates the first trigger lever 28. 8 shows the position of the nose 32 after the impact of the mass 37 on the second release lever 39.
• the compression springs 22 are supported on one end directly on the housing 16 and on the other end on the first pressure plate 21.
• the trigger rod 26 engages on the first pressure plate 21 and has an adjusting screw 26.1 at the opposite end.
• Mass element 37 is provided, the slide 37.1 being releasable by means of a bolt 36.1 of the electromagnet 36. As soon as the electromagnet 36 is electrically acted on, the bolt 36.1 is withdrawn and the mass element 37 falls onto the U-shaped first release lever 28 consisting of the first leg 30 and the second leg 31, the mass element 37 on the corresponding leg 30 of the U on each cable brake side falls and the first release lever 28 rotates about the axis 33 in the release position.
• FIG. 11 shows details of the release mechanism AM of the cable brake 15 according to FIG. 10. The first release lever 28 is shown with a bold line in its release position.
• a bolt 16.2 guided in an elongated slot 16.1 of the housing 16 retains the release rod 26 on a nose 26.2, the downward movement of the bolt 16.2 being prevented by means of a nose 28.1 of the first release lever 28.
• the path of the pin 16.2 downwards is free.
• the release rod 26 is moved in the direction of the cable strand 3 and the braking process is initiated.
• the compression springs 36 are reset by means of the clamping nut 26.1, which is in a right-hand thread and in a

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Insulated Conductors (AREA)

Priority Applications (2)

Applications Claiming Priority (3)

Related Child Applications (1)

Publications (2)

Family

ID=33547822

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Families Citing this family (34)

Family Cites Families (21)

• 2004
  • 2004-06-09 EP EP05112142A patent/EP1637495B1/fr not_active Expired - Lifetime
  • 2004-06-09 WO PCT/CH2004/000348 patent/WO2004110916A2/fr not_active Ceased
  • 2004-06-09 AT AT04736379T patent/ATE396141T1/de not_active IP Right Cessation
  • 2004-06-09 CN CNB2004800167220A patent/CN100515916C/zh not_active Expired - Fee Related
  • 2004-06-09 EP EP04736379A patent/EP1633671B1/fr not_active Expired - Lifetime
  • 2004-06-09 AT AT05112142T patent/ATE508980T1/de active
  • 2004-06-09 DE DE502004007232T patent/DE502004007232D1/de not_active Expired - Lifetime
• 2005
  • 2005-12-15 US US11/304,008 patent/US7543690B2/en not_active Expired - Fee Related
  • 2005-12-15 US US11/300,894 patent/US7287627B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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