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EP1826168B1 - Aufzug-not-stopp-vorrichtung - Google Patents

Aufzug-not-stopp-vorrichtung Download PDF

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Publication number
EP1826168B1
EP1826168B1 EP04807079.1A EP04807079A EP1826168B1 EP 1826168 B1 EP1826168 B1 EP 1826168B1 EP 04807079 A EP04807079 A EP 04807079A EP 1826168 B1 EP1826168 B1 EP 1826168B1
Authority
EP
European Patent Office
Prior art keywords
wedge
ascending
descending body
passenger car
pressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP04807079.1A
Other languages
English (en)
French (fr)
Other versions
EP1826168A1 (de
EP1826168A4 (de
Inventor
Mineo Mitsubishi Denki Kabushiki Kaisha OKADA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to EP12177599.3A priority Critical patent/EP2517998B1/de
Publication of EP1826168A1 publication Critical patent/EP1826168A1/de
Publication of EP1826168A4 publication Critical patent/EP1826168A4/de
Application granted granted Critical
Publication of EP1826168B1 publication Critical patent/EP1826168B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • 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
    • 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
    • B66B5/22—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 means of linearly-movable wedges

Definitions

  • the present invention relates to elevator safety devices for braking an ascending/descending body descending at overspeed.
  • a conventional elevator safety device provided on an ascending/descending body that is suspended by a suspending member(main wire rope) and travels up and down along guide rails, includes wedges shifting upward relative to the ascending/descending body along the guide rails, pressing members that press the wedges onto the guide rails by use of elastic members, and a frame that houses these components.
  • the pressing member is formed with a slope facing that of the wedge, parallel thereto, and rollers are interposed between the slopes of the wedge and the pressing member so as to roll on those slopes.
  • Another conventional elevator safety device includes, in addition to the above-described configuration, a pressing-force-adjusting means disposed parallel to the elastic member, for adjusting a biasing force of an elastic member, a control means for controlling the pressing-force-adjusting means, and a deceleration detecting device for detecting the deceleration of an ascending/descending body.
  • the control means is configured so as to control the pressing-force-adjusting means to decrease the pressing force by weakening the elastic force of the elastic member when the deceleration of the ascending/descending body exceeds a predetermined value, and to increase the pressing force by strengthening the elastic force when the deceleration falls below the predetermined value (e.g., refer to Patent Document 2).
  • Still another conventional elevator safety device is provided with a fluid-filled pressure vessel, instead of the elastic member described above. Varying the pressing force by adjusting the sort of fluid and the fluid pressure inside the pressure vessel, an ascending/descending body is stopped so as to prevent the deceleration from increasing, (e.g., refer to Patent Document 3).
  • an ascending/descending body having a passenger car and a counterweight is suspended by a suspending member(main wire rope), and travels up and down in a jig-back way by driving the suspending member.
  • the Building Standard Law Enforcement Order of Japan and the EN Standard specify that the elevator safety device must stop the ascending/descending body at an average deceleration of not more than 1.0 G under braking condition so as not to cause passengers to feel uncomfortable nor damage to the ascending/descending body and the counterweight during braking operation.
  • the braking force by the elevator safety device is ordinarily set so that the ascending/descending body is braked at an average deceleration of 0.6 G under the condition of the passenger car of the ascending/descending body loaded with the rated mass, in the event of free fall of the ascending/descending body due to suspending member breakage or the like.
  • This setting of the braking force is accomplished by setting the pressing force at a predetermined value that is the biasing force of the elastic member at the moment that the top of the wedge has been brought into contact with the frame to stop upward shifting of the wedge.
  • the pressing force by the wedge is set at a constant value so that the deceleration by the braking force becomes 0.6 G under the rated load mass condition, irrespective of the actual load mass of the ascending/descending body, the deceleration under braking is increased when the actual load mass is smaller than the rated load mass.
  • prevention of the ascending/descending body and the counterweight from being damaged requires enhancement of shock resistance by strengthening the structure of the ascending/descending body, increasing the ascending/descending body weight and costs uneconomically.
  • Another conventional elevator safety device includes elastic members, a pressing-force-adjusting means disposed parallel to the elastic member, for adjusting the pressing force, a control means for controlling the pressing-force-adjusting means, and a deceleration detecting device for detecting the deceleration of an ascending/descending body.
  • the control means controls the pressing force proportional to the ascending/descending body deceleration fluctuating every moment, which leads to a requirement of complicated control.
  • the pressing-force-adjusting means has such a structure that does not adjust the elastic member but the elastic member biasing force itself, the safety device becomes complicated, causing it to be uneconomical.
  • equipping the safety device with the deceleration detecting device that detects the ascending/descending body deceleration, which is not necessary for ordinary elevator also brings it to be uneconomical.
  • the present invention is made in order to solve the above-discussed problems, and an object of the invention is to obtain an elevator safety device that mitigates the deceleration during braking operation with a simple structure without any complicated control, so as not to cause passengers to feel uncomfortable nor damage to the ascending/descending body and the counterweight.
  • Another object of the invention is to obtain an elevator safety device that mitigates the deceleration during braking operation depending on whether or not an ascending/descending body is suspended by a suspending member, so as not to cause passengers to feel uncomfortable and nor damage to the ascending/descending body and the counterweight as well.
  • An elevator safety device comprises the features of claim 1, 2 or 3. Further embodiments are mentioned in the dependent claims.
  • the present invention can realize a braking operation at a desired deceleration in accordance with load conditions of an ascending/descending body, which mitigates shock during the braking and causes passengers not to feel uncomfortable for passengers as well as no damage to the ascending/descending body and the counterweight.
  • FIG. 1 is a view showing a schematic structure of an elevator system
  • Fig. 2 and 3 are views showing a major portion of a passenger car door
  • Fig. 4 is a view showing a major portion of the elevator safety device
  • Fig. 5 and 6 are views illustrating the operation of the elevator safety device.
  • an ascending/descending body 1 has a passenger car 2 that passengers get on and off and a frame member 3 that supports the passenger car 2.
  • a car floor frame 3a is provided on the lower portion of the frame member 3, and elastic members 4 made of rubber, for example, is interposed between the passenger car 2 and the car floor frame 3 in order to prevent vibration from propagating from the frame member 3 to the passenger car 2 during ascending/descending.
  • a load-weighting sensor 5 is also interposed between the passenger car 2 and the car floor frame 3 to measure load mass, i.e., the mass of passengers getting on and off the passenger car 2. Elevators are generally equipped with the load-weighting sensor 5 so as not to be operated with load mass exceeding its rated load value.
  • the load-weighting sensor 5 which is composed of a differential transformer, equivalently measures load mass by measuring with the differential transformer in the load-weighting sensor 5 a distorted amount of the elastic member 4 attached on the passenger car 2, due to load mass fluctuation with passengers getting on and off. It is noted that the load-weighting sensor 5 is not limited to a differential transformer but may be composed of any other devices such as a laser displacement sensor, for example, as long as they are able to measure interspace distance.
  • the passenger car 1 and the counterweight 6 are hangingly attached to a suspending member 7.
  • the suspending member 7 is wound around a traction sheave 8 and a deflection pulley 9, in order to increase the space between the ascending/descending body 1 and the counterweight 6, and suspends the ascending/descending body 1.
  • the ascending/descending body 1 and the counterweight 6 travel up and down in a jig-back way by driving the traction sheave 8.
  • a shackle spring 7a which elastically supports the ascending/descending body 1, is attached to the coupling portion of the ascending/descending body 1 and the suspending member 7 in order to block vibration propagating through the suspending member 7 during elevator operation.
  • Guide shoes 10 are attached to four corners of both top and bottom of the ascending/descending body 1, so that the ascending/descending body 1 travels up and down along guide rails 11 by engaging the guide shoes 10 with the guide rails 11. Furthermore, at the bottom portion of the ascending/descending body 1, a pair of safety devices 12 is interposed between the guide shoe 10 and the ascending/descending body 1, so as to brake to stop the ascending/descending body 1 in the event of an emergency such as control unit failures or suspending member breakage.
  • Installed at the top of an elevator shaft is a governor 13 that detects the speed of the ascending/descending body 1.
  • a tension pulley 15 is installed at the lower portion of the shaft in order to stretch along the shaft a governor rope 14 that is wound around the governor 13. Thus, the governor rope 14 is stretched across the governor 13 and the tension pulley 15.
  • the governor 13 is provided with a grasping portion (not shown) that operates to grasp the governor rope 14 if ascending/descending body 1 speed exceeds its rated speed and reaches a predetermined overspeed.
  • the governor rope 14 is connected to the ascending/descending body 1 through a safety link 16, and the safety link 16 is connected to the safety devices 12 through lifting-rods 17 disposed on both lateral sides of the ascending/descending body 1.
  • the passenger car 2 is provided with a door open/close device 18.
  • the door open/close device 18 will be explained with reference to Fig. 2 .
  • the door open/close device 18 is equipped with a left-and-right pair of doors 19a and 19b, a door sill 20 that slidably engages the lower portion of the doors 19a and 19b, and a door driving device 21 that is mounted on the upper portion of the elevator car 2 and actuates the doors 19a and 19b to open and close.
  • the door driving device 21 has a door motor 22 and a diverting pulley 24 that stretches a belt 23 wound around the door motor 22.
  • Door hangers 25a and 25b each attached to the top of the doors 19a and 19b, are attached to the upper and lower portions of the belt 23, respectively.
  • the door driving device 21 is equipped with a door open/close switch 26 to detect open/close states of the doors 19a and 19b, and the switch 26 is put into operation by contacting a dog 27 attached to the door 19b, one of the doors.
  • Fig. 2 shows the closed state of the doors 19a and 19b
  • Fig. 3 shows the open state.
  • the door hangers 25a and 25b, and the doors 19a and 19b each are actuated in the directions to be opened with the belt 23 being driven by driving the door motor 22 to rotate counterclockwise, which leads the doors to the open state as shown in Fig. 3 .
  • the switch 26 performs an on-off operation in response to whether or not the switch contacts the dog 27 attached to the door 19b by opening/closing the doors 19a and 19b.
  • an elevator is generally equipped with above described components.
  • Figure 4 is a view, viewed from Arrow "A", illustrating a major portion of the elevator safety device 12.
  • the safety device 12 has a frame 51 mounted on the underside of the car floor frame 3a, and in the frame 51, are provided coil springs 52 that are elastic members attached to the frame 51; pressing members 53 each fixed on the coil springs 52 and having a pressing member slope 53a that forms a wedge shape narrowing toward the bottom; rollers 54 that roll on the slope 53a of the pressing member 53; and wedges 55 each interposed between the guide rail 11 and the rollers 54 and having a wedge slope 55a that forms a wedge shape narrowing toward the top and faces the slope 53a of the pressing member 53.
  • the wedge 55 has a braking surface 55b on the opposite side of the slope 55a, and the braking surface 55b faces a side of the guide rail 11. Moreover, a lifting-rod 17 is attached to the wedge 55.
  • the guide shoe 10 is fixed on the underside of the frame 51 of the safety device 12 and is engaged with the guide rail 11.
  • the safety device 12 is provided with a wedge-position-adjusting means 56.
  • the wedge-position-adjusting means 56 is composed of a stop 56a that slides to travel upward and downward with respect to the frame 51 and contacts the top of the wedge 55; an actuator 56b that actuates the stop 56a upward and downward.
  • the stop 56a is composed of a rack having teeth formed thereon
  • the actuator 56b is composed of a pinion engaged with the rack teeth of the stop 56a and a motor (not shown) that drives the pinion.
  • the motor which is not shown, is provided with a braking device that is a stop-fixing means in order to fix a vertical position of the stop 56a.
  • the coil spring 52, the pressing member 53, roller 54, the wedge 55, stop 56a, and actuator 56b each, which are described above, are configured in pairs on the left and right of the guide rail 11.
  • the traction sheave 8 drives the suspending member 7, so as to operate the ascending/descending body 1 and the counterweight 6, which are suspended by the suspending member 7, to travel up and down in jig-back way.
  • the ascending/descending body 1 travels up and down in the elevator shaft along the guide rails 11 engaged with the guide shoe 10.
  • the governor rope 14, which is connected to the ascending/descending body 1 through the safety-link 16, moves along with the ascending/descending body 1 ascending/descending, to rotate the governor 13 that is wound around with the governor rope 14.
  • the safety device 12 retains a state where the wedge 55 stays in a lower position, so that the braking surface 55a remains off from the guide rail 11, as shown in Fig. 4 .
  • the wedge 55 connected to the lifting-rod 17 is shifted upward relative to the ascending/descending body 1. Since the pressing member 53 and the wedge 55 have pressing member slopes 53a and 55a formed in a wedge shape, the more upward the wedge 55 is shifted, the closer the wedge comes to the guide rail 11, by the wedge action, being guided by the roller 54, so that the braking surface 55b goes into contact with the guide rail 11. Then, the wedge 55 is further shifted upward, so as to pushingly expand the pressing member 53 against the biasing force of the coil springs 52; thereby, the reaction against the biasing force presses the wedge 55 onto the guide rail 11 to create a braking force, which brakes the ascending/descending body 1.
  • the top of the wedge 55 is brought into contact with the stop 56a, so as to stop upward shifting, as illustrated in Fig. 5 .
  • the position where the wedge 55 stops upward shifting refers to as "upward-shift stop position”.
  • the coil spring 52 biasing force created by the wedge 55 in the upward-shift stop position becomes pressing force, i.e., the braking force that brakes the ascending/descending body 1.
  • the operation of the wedge-position-adjusting means 56 will be explained with reference to Fig. 4 , Fig. 5 , and Fig. 6 .
  • the braking force should be set to be larger accordingly, and when the mass of the ascending/descending body 1 becomes smaller, the braking force should be set to be smaller accordingly in order to perform braking operations at a predetermined deceleration. Therefore, the braking force should be set in accordance with load mass of the elevator car 2.
  • load mass of the passenger car 2 is measured by the load-weighting sensor 5 measuring the distorted amount of the elastic member 4 due to load mass fluctuation with passengers getting on and off.
  • the maximum load mass i.e., the rated load mass
  • the wedge-position-adjusting means 56 shifts the stop 56a to the highest position by the actuator 56b as shown in Fig. 4 , so that upward shifting of the wedge 55 is stopped in its highest position during braking.
  • the pressing member 53 is pushingly expanded at its maximum against the coil spring 52, so that the biasing force by the coil spring 52 becomes maximum as shown in Fig. 5 .
  • the pressing force i.e., the braking force also becomes maximum.
  • the wedge-position-adjusting means 56 shifts the stop 56a to the lowest position by the actuator 56b, so that the wedge 55 stops upward shifting in its lowest position when braking as shown in Fig. 6 .
  • the pressing member 53 is pushingly expanded at its minimum against the coil spring 52, so that the biasing force of the coil springs 52 becomes minimum.
  • the pressing force i.e., the braking force also becomes minimum.
  • vertical position of the stop 56a is adjusted in accordance with the load mass, so that the pressing force by the wedge 55 is set by setting the upward-shift stop position of the wedge 55.
  • the wedge-position-adjusting means 56 adjusts vertical position of the stop 56a in accordance with passengers mass, i.e., load mass by deactivating the braking device of the actuator 56a and activating the motor thereof, as described before, so as to set in accordance with the load mass the pressing force by the wedge 55, acting during braking operation.
  • the wedge-position-adjusting means 56 fixes vertical position of the stop 56a in accordance with the load mass by deactivating the motor and activating the braking device of the actuator 56b. Thereby, the stop 56a is retained in the state of being fixed in the adjusted vertical position during ascending/descending of the ascending/descending body 1 in the state loaded with passengers.
  • the braking force F is obtained by subtracting the upward force acting on the ascending/descending body by the counterweight Fb from the sum of a force bearing the total mass (W + Wc) itself to be ascended/descended and a force decelerating the total mass at a deceleration of ⁇ .
  • the Building Standard Law Enforcement Order of Japan and the EN Standard specify that the elevator safety device must stop the ascending/descending body at an average deceleration of not more than 1.0 G under braking operation so as not to cause passengers to feel uncomfortable nor damage to the ascending/descending body and the counterweight during braking operation.
  • the braking force by the elevator safety device is ordinarily set at the average deceleration of 0.6 G, in the event of free fall of the ascending/descending body under the rated load condition, due to suspending member breakage or the like.
  • the pressing force by the wedge is set to such a constant value as a braking force that makes the deceleration be 0.6 G under the rated load mass condition, irrespective of the amount of the ascending/descending body load mass, the smaller the load mass becomes, the larger deceleration becomes.
  • this embodiment provides an elevator safety device having a pressing-force-adjusting means for setting the pressing force by the wedge 55, i.e., the braking force in accordance with load mass by setting the upward-shift stop position of the wedge 55 with the wedge-position-adjusting means 56 adjusting vertical position of the stop 56a in accordance with passenger car 2 load mass measured by the load-weighting sensor 5.
  • an elevator safety device of this embodiment can perform braking operation at a desired deceleration in accordance with load conditions of the ascending/descending body 1; thereby, shock during braking is reduced, causing passengers not to feel uncomfortable as well as no damage to the ascending/descending body 1 and the counterweight 6, because load mass of the ascending/descending body is measured by the load-weighting sensor 5 so that the pressing force by the wedge 55 is set so as to decelerate at a desired deceleration during braking in accordance with the measured load mass.
  • the ascending/descending body 1 does not need to be structured so rigid as to enhance the shock resistance, an economical elevator safety device can be obtained without increasing ascending/descending body 1 weight.
  • an elevator safety device can be obtained that does not make passengers feel uncomfortable as well as causes no damage to the ascending/descending body 1 and the counterweight 6.
  • the average deceleration during braking operation is specified to be not more than 1.0 G by the Building Standard Law Enforcement Order of Japan and the EN Standard.
  • an elevator safety device can be obtained that conforms to the regulations with quite a simple structure, and without taking complicated control.
  • the pressing-force-adjusting means of this embodiment adjusts the pressing force by the wedge 55 in accordance with load mass by use of the wedge-position-adjusting means 56 that sets the upward-shift stop position of the wedge 55, which eliminates the need for devices that adjust the biasing force itself of the coil spring 52, i.e., the elastic member, an economical elevator safety device can be obtained that can be configured with quite a simple structure such as the wedge-position-adjusting means 56 that sets the upward-shift stop position of the wedge 55.
  • the wedge-position-adjusting means 56 can be configured with such a simple structure that the upward-shift stop position of the wedge 55 is set by adjusting vertical position of the stop 56a.
  • a pressing-force-applying means is not a fluid-filled pressure vessel but an elastic member used in ordinary elevators, an easy-to-maintain elevator safety device can be obtained without need for any maintenance against fluid pressure leakage or the like.
  • this embodiment is equipped with a braking device that is a stop-fixing means for fixing a vertical position of the stop 56a, the stop 56a retains in its adjusted vertical position during ascending/descending body 1 ascending/descending by keeping the adjusted vertical position of the stop 56a fixed after passengers have finished getting on and off the elevator car 2 and the doors 19a and 19b have been closed, a highly reliable elevator stopping device can be obtained that is able to perform braking operations while keeping the braking force in accordance with load mass
  • the elastic member is formed with the coil spring 52
  • the elastic member is not limited to this but may be formed with, for example, a U-shape leaf spring, both sides of which are engaged with the pressing member 53 to press the wedge 55.
  • the pressing-force-adjusting means of this embodiment is structured such that the wedge-position-adjusting means 56 sets the upward-shift stop position of the wedge 55, it is not limited to this; the pressing-force-adjusting means may be structured such that it is disposed parallel to, for example, the elastic member, i.e., the coil spring 52 so as to adjust the coil spring 52 biasing force itself, and then the biasing force is adjusted in accordance with load mass measured by the load-weighting sensor 5.
  • the deceleration detecting device is not needed, which eliminates the need for complicated control, a structure is required by which the coil spring 52 biasing force itself is adjusted, which causes the safety device to increase in size.
  • FIG. 7 illustrates an elevator safety device according to Embodiment 2 for embodying the present invention.
  • the wedge-position-adjusting means 56 of Embodiment 1 has been modified to be structured with the actuator 56b and the stop 56a formed with the rack-and-pinion mechanism.
  • a wedge-position-adjusting means 57 of an safety device 12a of this embodiment is equipped with a stop 57a that can be slid and vertically shifted with respect to the frame 51 to contact the top of the wedges 55, and an actuator 57b that actuates the stop 57a.
  • the stop 57a is in a rod shape and formed with a thread thereon.
  • the wedge-position-adjusting means 57 is further equipped with a nut 58 that is screwed onto the stop 57a, a belt 59 that is wound around the nut 58, and a pulley 60 around which the belt 59 rotated by the actuator 57b is wound.
  • a nut 58 that is screwed onto the stop 57a
  • a belt 59 that is wound around the nut 58
  • a pulley 60 around which the belt 59 rotated by the actuator 57b is wound.
  • the actuator 57b rotates the pulley 60, so that the belt 59 is driven to rotate the nut 58.
  • the stop 57a is shifted upward and downward by screw action with the nut 58 being rotated.
  • Vertical position of the stop 57a is adjusted such that the pressing force by the wedge in accordance with load mass measured by the load-weighting sensor 5, similarly to Embodiment 1.
  • the configuration described above can also bring about the same effect as that of Embodiment 1.
  • the upward-shift stop position of the wedge 55 is set in accordance with load mass by adjusting stop 57a vertical position so that the top of the wedge 55 is brought into contact with the stop 57a; however, the configuration is not limited to this.
  • the upward-shift stop position of the wedge 55 may be set by providing inside the wedge 55 with a mechanism that varies the space between the sloped surface 55a and the braking surface 55b of the wedge 55 to adjust the space in accordance with load mass. This case, however, needs a mechanism, housed inside the wedge 55, to vary the space between the sloped surface 55a and the braking surface 55b of the wedge 55, causing the elevator safety device to become bulky.
  • FIG 8 , 9 and 10 illustrate an elevator safety device according to Embodiment 3 for embodying the present invention.
  • Figure 8 shows a major portion of the elevator safety device of Embodiment 3.
  • this embodiment is equipped with engaging members 70 for engaging the stop 56a, and an engaging-member-operating mechanism 71 for actuating the engaging member 70; reference symbols that are the same as those in Embodiment 1 refer to equivalent items.
  • the engaging member 70 is L-shaped; one end thereof is pivotally supported on a pivot 70a and the other end has an engaging portion 70b that is formed so as to engage with the teeth of the actuator 56b.
  • the actuator 56b is engaged with the engaging portion 70b engaging with the teeth of the actuator 56b; thereby, the stop 56a is latched.
  • the engaging member 70 is provided with a restoring means for restoring the engaging portion 70b in such a way that the engaging portion moves in a direction away from the actuator 56b, i.e., in the direction indicated by Arrow "B" in Fig. 8 .
  • Any means may be employed as long as it is configured to restore by the restoring force of the torsion spring the engaging portion 70b in the direction indicated by Arrow “B", by providing, for example, a torsion spring on the pivot 70a.
  • the stop 56a, the actuator 56b, and engaging member 70 each described above are disposed in pairs on the left and right of the guide rail, as shown in Fig. 8 . Beside, the safety device 12b structured with these components is mounted on both sides of the ascending/descending body 1, similarly to that in Fig. 1 .
  • Figure 9 is an overall view, viewed from Arrow "C" in Fig. 8 , illustrating the engaging-member-operating mechanism 71.
  • the engaging-member-operating mechanism 71 is provided with at least two or more wires 72a.
  • One end of the wires 72a is pivotally connected to the right and left engaging members 70 and the other end thereof is wound up around the winding pulley 73a coaxially attached to the rotating shaft of the door motor 22.
  • Wires 72a are stretched across a first diverting pulley 74a and a second diverting pulley 75a that are attached to the car floor frame 3a.
  • the engaging-member-operating mechanism 71 is also provided with at least two or more wires 72b; one end of the wires 72b is pivotally connected to the right and left engaging members 70, respectively, and the other end thereof is wound up around the winding pulley 72b coaxially attached to rotating shaft of the diverting pulley 24.
  • Wires 72b are also stretched across a third diverting pulley 74b and a forth diverting pulley that is not shown in the figures. Additionally, the forth diverting pulley, which is not shown in the figures, is equivalent to the second diverting pulley 75a.
  • Embodiment 1 detecting by the door switch 26 open/close of the doors 19a and 19b of the passenger car 2, the wedge-position-adjusting means 56 sets, in accordance with load mass, the pressing force by the wedge 55 in braking operation by adjusting vertical position of the stop 56a after deactivating the braking device and activating the motor of actuator 56b when the doors 19a and 19b are open.
  • the wedge-position-adjusting means 56 deactivating the motor and activating the braking device of actuator 56b so as to fix a vertical position of the stop 56a adjusted in accordance with the load mass.
  • the wedge-position-adjusting means 56 fixes a vertical position of the stop 56a by fixing rotation of the pinion of the actuator 56b in a predetermined position by urging the braking device of the actuator 56b.
  • the engaging-member-operating mechanism 71 windingly stretches the wires 72a and 72b with the winding pulleys 73a and 73b rotated in cooperation with rotational drive by the door motor 22.
  • the engaging member 70 is pivoted against the restoring force of the restoring means so that the engaging portion 70b is engaged with the pinion of the actuator 56b.
  • the engaging member 70 fixes a vertical position of the stop 56a by fixing the pinion rotation of the actuator 56b with engaging portion 70b engaged with the pinion of the actuator 56b when the doors 19a and 19b are closed.
  • the engaging member 70 and engaging-member-operating mechanism 71 operate in the sequence reverse of the above when the doors 19a and 19b are opened.
  • the engaging member 70 fixes a vertical position of the stop 56a by engaging itself with the pinion of the actuator 56b
  • the engaging member 70 is not limited to this but may be directly engaged with the teeth formed on the stop 56a.
  • teeth may be formed on the nut 58 or the pulley 60 of the wedge-position-adjusting means 57 of Embodiment 2 so as to engage the engaging member 70 with the stop 57a; any other means may be employed as long as it can engage the stop.
  • the stop 56a is fixed in cooperation with the braking device of the actuator 56b, the stop 56a may be fixed by the engaging member 70 only.
  • this embodiment is provided with an engaging member 70 for engaging the stop 56a, and an engaging operation mechanism 71 for actuating the engaging member 70 in response to the doors 19a and 19b movement of the passenger car 2, by engaging the adjusted vertical position of the stop 56a after passengers have finished getting on and off and the doors 19a and 19b have been closed, a highly reliable elevator safety device can be obtained that retains the stop 56a firmly in its adjusted vertical position during ascending or descending of the ascending/descending body 1, so as to be able to perform braking operation while securely keeping the braking force in accordance with load mass.
  • a highly reliable elevator safety device can be obtained that can perform braking operation while more securely keeping the braking force in accordance with load mass, by fixing the stop 56a by means of the braking device as well as by engaging the stop 56a by means of the engaging member 70 engaging the stop 56a.
  • FIG 11 illustrates an elevator safety device according to Embodiment 4 for embodying the present invention.
  • Figure 12 is a view illustrating the operation of an elevator safety device of this embodiment.
  • a wedge-position-adjusting means in this embodiment is modified from that in Embodiment 1.
  • the wedge-position-adjusting means 80 is equipped with a pair of stops 80a that extends loosely through the frame 51, a stop connecting member 80b that connects and fixes the pair of stops 80a, a first link 81a one side of which is pivotally connected to either one of the pair of the stops 80a, and a second link 81b one side of which is pivotally connected to the other side of the first link 81a.
  • the other side of the second link 81b is fixed to the bottom portion of the passenger car 2.
  • the first link 81a is pivotally supported to a support member 82 in a position between the one side and the other side, and the support member 82 is fixed to the frame 51.
  • a link mechanism 83 is structured with the first link 81a, the second link 81b, and the support member 82. Reference symbols other than the above, which are the same as those in Embodiment 1, refer to equivalent items.
  • the upward-shift stop position of the wedge 55 is set by electrically adjusting vertical position of the stop 56a in accordance with load mass of the passenger car 2, detected by the load-weighting sensor 5, the upward-shift stop position of the wedge 55 in this embodiment is set by mechanically adjusting vertical position of the stop 80a with the link mechanism 83 in accordance with load mass of passenger car 2 without use of the load-weighting sensor 5.
  • the second link 81b fixed to the bottom portion of the passenger car 2 is also located upward.
  • the first link 81a the other side of which is pivotally connected to the second link 81b, is put into a state where the one side is pivoted downward with centering on the pivotally connected portion of the support member 82, bringing also into a downward-shifted state the stop 80a that is pivotally connected to the one side of the first link 81a.
  • the second link 81b is also shifted downward.
  • the first link 81a is put into a state where one side thereof is pivoted upward with centering on pivotally connected portion of the support member 82, bringing also the stop 80a into an upward-shifted state.
  • vertical shifting of the passenger car 2 due to distortion of the elastic member 4 is converted by the link mechanism 83 into vertical position of the stop 80a in accordance with the load mass.
  • the top of the wedge 55 is brought into contact with the stop 80a whose vertical position is adjusted in accordance with load mass, similarly to Embodiment 1, so that the pressing force, i.e., the braking force during braking is set in accordance with the load mass.
  • the stop 80a whose vertical position has been adjusted in accordance with load mass, may be engaged by the engaging member 70.
  • this embodiment is provided with an elastic member 4 for elastically supporting the passenger car 2 to the car floor frame 3a so as to set the stop 80a in a vertical position by the link mechanism 83 in accordance with vertical shift of the passenger car 2 shifted vertically due to distortion of the elastic member 4 distorted by load mass of passengers getting on and off the passenger car 2. Therefore, an elevator safety device can be obtained in which the pressing force by the wedge 55 can be mechanically set in accordance with the load mass, without any device that needs electric power, so as to be able to reduce shock during braking with quite a simple structure and without any electrical control, not making passengers feel uncomfortable and nor causing damage to the ascending/descending body las well as the counterweight 6.
  • a highly reliable elevator safety device can be obtained in which the stop 80a firmly maintains its adjusted vertical position during ascending or descending of the ascending/descending body 1, so as to be able to perform braking operation, while securely keeping the braking force in accordance with load mass.
  • FIG. 13 illustrates an elevator safety device according to Embodiment 5 for embodying the present invention.
  • the pressing force by the wedge 55 is set depending on whether or not the ascending/descending body 1 is suspended by the suspending member 1.
  • the device is provided with a pair of stops 90a that is extended loosely through the frame 51, a stop connecting member 90b that connects the pair of stops 90a with each other and fixes them, a first link 91 one side of which is pivotally connected to either of the pair of stops 90a, and a connecting member 92 one side of which is pivotally connected to the other side of the first link 91.
  • the other side of the connecting member 92 is pivotally connected to the shackle spring 7a.
  • the first link 91 is pivotally connected to a support member 93 in a position between the one side and the other side thereof, and the support member 93 is fixed on the frame 51.
  • a link mechanism 94 is indicated by the first link 91, the connecting member 92, and the support member 93, and a wedge-position-adjusting means 90 is configured with the stops 90a, the stop connecting member 90b, and the link mechanism 94.
  • the entire elevator configuration is the same as that of Embodiment 1 and reference symbols that are the same as those in Embodiment 1 refer to equivalent items.
  • Figure 13 illustrates a state where the ascending/descending body 1 is suspended normally by the suspending member 7
  • Figure 14 illustrates a state where the ascending/descending body 1 is not suspended by the suspending member 7 due to suspending member breakage or the like.
  • the stop 90a pivotally connected to the one side of the first link 91 is also put into a downward-shifted state. This brings the upward-shift stop position of the wedge 55 into a state of being set in a lower position, so that the pressing force by the wedge 55, that is, the braking force during braking is set to be small.
  • this embodiment is provided with the wedge-position-adjusting means 90 having the link mechanism 94;, that is, the pressing force adjusting means that sets the braking force to be small when the ascending/descending body 1 is suspended by the suspending member 7, and, on the contrary, sets the braking force to be large when the ascending/descending body 1 becomes unsuspended by the suspending member 7.
  • Embodiment can perform braking operation at a desired descending speed depending on whether or not the ascending/descending body 1 is suspended by the suspending member 7, so as to reduce shock without increasing descending speed during breaking, under any overspeed-descending conditions of the ascending/descending body 1, such as descending at overspeed due to control unit failures in a suspended state of the ascending/descending body 1 by the suspending member 7 or descending at overspeed by free fall of the ascending/descending body 1 due to breakage of the suspending member 7, an elevator safety device can be obtained that does not make passengers feel uncomfortable as well as causes no damage to the ascending/descending body 1 and the counterweight.
  • FIG. 15 illustrates an elevator safety device according to Embodiment 6 for embodying the present invention.
  • a function is added to Embodiment 1 in which the pressing force is set depending on whether or not the ascending/descending body 1 is suspended by the suspending member 7.
  • this embodiment is provided with a switch 100 that operates when the shackle spring 7a is expanded to contact the switch 100; other than those, the entire elevator configuration is the same as that of Embodiment 1 and reference symbols that are the same as those in Embodiment 1 refer to equivalent items.
  • Figure 15 shows a state of the ascending/descending body 1 normally suspended by the suspending member 7
  • Figure 16 shows a state of the ascending/descending body 1 not suspended by the suspending member 7 due to its breakage.
  • the upward-shift stop position of the wedge is set by adjusting vertical position of the stop 56a in accordance with its load mass after passengers getting on and off the passenger car 2, as in Embodiment 1, so that the pressing force, i.e., the braking force is set in accordance with the load mass.
  • the pressing force is set by subtracting the force Fb.
  • the pressing force is set by setting the upward-shift stop position of the wedge so that the braking force Fc is given as bellow:
  • Fc W + Wc + W + Wc * ⁇ c g ⁇ Fb
  • W denotes the mass of the ascending/descending body 1 without load
  • Wc load mass
  • ac a desired average deceleration during braking, which is, for example, 0.6 G.
  • the shackle spring 7a is released from the suspended load and is put into a stretched state by the elastic force, as in Fig. 16 ; thereby, the switch 100 goes into action by contacting the shackle spring 7a, so as to detect that the suspending member 7 has come into a not suspending state.
  • the upward-shift stop position of the wedge is set by adjusting vertical position of the stop 56a in accordance with the load mass except for the force Fb, so that the pressing force, i.e., the braking force is set in accordance with the load mass.
  • this embodiment is provided with the switch 100 that detects whether or not the suspending member 7 suspends the ascending/descending body 1, and the pressing-force-adjusting means that sets the pressing force by setting the upward-shift stop position of the wedge 55, depending on whether or not the suspending member suspends the ascending/descending body, in accordance with load mass.
  • the pressing force may be set by setting the upward-shift stop position of the wedge 55 depending only on whether or not the suspending member suspends the ascending/descending body.
  • this embodiment is configured with the wedge-position-adjusting means 56 having the rack-and-pinion mechanism, it can be configured with the wedge-position-adjusting means 57 having a threaded stop 57a as in Embodiment 2.
  • Embodiment can perform braking operation at a desired deceleration depending on whether or not the ascending/descending body 1 is suspended by the suspending member 7, so as to reduce shock without increasing deceleration during breaking, under any overspeed-descending conditions of the ascending/descending body 1 such as descending at overspeed due to control unit failures in a state of the ascending/descending body 1 suspended by the suspending member 7 or descending at overspeed by free fall of the ascending/descending body 1 due to breakage of the suspending member 7.
  • this embodiment can perform braking operation at a desired deceleration in accordance with load mass of the ascending/descending body 1, so as to reduce shock during breaking, under any load conditions and descending of ascending/descending body 1 at overspeed, an elevator safety device can be obtained that does not make passengers feel uncomfortable as well as causes no damage to the ascending/descending body 1 and the counterweight.
  • an elevator safety device which reduces shock during braking when braking ascending/descending body descending at overspeed, so as not to make passengers feel uncomfortable as well as to cause no damage to the ascending/descending body and the counterweight, is suitable for use in devices that stop an ascending/descending body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Claims (9)

  1. Aufzugssicherheitseinrichtung (12), aufweisend:
    einen hinaufsteigenden/absteigenden Körper (1) zum Auf-und-Ab-Bewegen entlang von Führungsschienen (11), wobei der hinaufsteigende/absteigende Körper (1) einen Passagierfahrkorb (2) zum Unterbringen von Passagieren darin und Rahmenelemente (3) zum Abstützen des Passagierfahrkorbes aufweist;
    einen Keil (55), der an dem hinaufsteigenden/absteigenden Körper (1) vorgesehen ist, um sich bei einem Notfall entlang der Führungsschiene (11) nach oben relativ zu dem hinaufsteigenden/absteigenden Körper (1) zu versetzen;
    ein Drückelement(53) zum Drücken unter der Drängkraft eines elastischen Elements (52) des Keils (55) auf die Führungsschiene (11);
    eine Drückkrafteinstelleinrichtung um die Drückkraft auf den Keil (55) klein einzustellen, wenn die Lastmasse des hinaufsteigenden/absteigenden Körpers (1), die beim Ein- und Aussteigen der Passagiere schwankt, gering wird und zum Einstellen einer Drückkraft auf den Keil (55) um groß zu sein, wenn die Lastmasse groß wird, wobei die Drückkrafteinstelleinrichtung eine Keilpositionseinstelleinrichtung (56, 57, 80) zum Einstellen einer nach oben versetzten Anhalteposition des Keils (55) aufweist, um die Drückkraft auf den Keil (55) in Abhängigkeit von der nach oben versetzten Anhalteposition des Keils (55) einzustellen,
    dadurch gekennzeichnet, dass
    der hinaufsteigende/absteigende Körper (1) mit elastischen Elementen (4) zum elastischen Abstützen des Passagierfahrkorbs (2) an den Rahmenelementen (3) versehen ist; und
    die Keilpositionseinstelleinrichtung (56, 57, 80) die nach oben versetzte Anhalteposition des Keils (55) gemäß dem Betrag einstellt, um den der Passagierfahrkorb sich vertikal aufgrund eines Versatzes der elastischen Elemente (4) versetzt, der durch eine Lastmassenschwankung beim Einsteigen und Aussteigen von Passagieren in dem Passagierfahrkorb erwirkt wird.
  2. Aufzugssicherheitseinrichtung (12), aufweisend:
    einen hinaufsteigenden/absteigenden Körper (1), der an einem Aufhängungselement (7) aufgehängt ist, um sich entlang von Führungsschienen (11) aufwärts und abwärts zu bewegen, wobei der hinaufsteigende/absteigende Körper (1) einen Passagierfahrkorb (2) zum Unterbringen von Passagieren darin und Rahmenelemente (13) zum Abstützen des Passagierfahrkorbs aufweist;
    einen Keil (55), der an dem hinaufsteigenden/absteigenden Körper (1) vorgesehen ist, um sich in einem Notfall entlang der Führungsschiene (11) nach oben relativ zu dem hinaufsteigenden/absteigenden Körper (1) zu versetzen;
    ein Drückelement (53) zum Drücken des Keils (55) auf die Führungsschiene (11) gemäß dem Drängen des elastischen Elements (52);
    eine Drückkrafteinstelleinrichtung aufweisend eine Keilpositionseinstelleinrichtung (56, 57, 80) zum Einstellen einer nach oben versetzten Anhalteposition des Keils (55), um die Drückkraft auf den Keil (55) in Abhängigkeit von der nach oben versetzten Anhalteposition des Keils (55) einzustellen,
    wobei die Drückkrafteinstelleinrichtung die Drückkraft auf den Keil (55 klein einstellt, wenn der hinaufsteigende/absteigende Körper (1) an dem Aufhängungselement (7) aufgehängt wird, und die Drückkraft auf den Keil groß einstellt, wenn der hinaufsteigende/absteigende Körper (1) sich löst,
    dadurch gekennzeichnet, dass
    der hinaufsteigende/absteigende Körper (1) mit elastischen Elementen (4) versehen ist, um elastisch den Passagierfahrkorb (2) an den Rahmenelementen (3) abzustützen;
    und
    die Keilpositionseinstelleinrichtung (56, 57, 80) die nach oben versetzte Anhalteposition des Keils (55) gemäß dem Betrag, um den der Passagierfahrkorb sich vertikal aufgrund eines Versatzes der elastischen Elemente (4) versetzt, der durch Massenfluktuation beim Einsteigen und Aussteigen von Passagieren aus dem Passagierfahrkorb (2) erwirkt wird, einstellt.
  3. Aufzugssicherheitseinrichtung (12), aufweisend:
    einen hinaufsteigenden/absteigenden Körper (1), der an einem Aufhängungselement (7) aufgehängt ist, um sich entlang von Führungsschienen (11) aufwärts und abwärts zu bewegen, wobei der hinaufsteigende/absteigende Körper (1) einen Passagierfahrkorb (2) zum Unterbringen von Passagieren darin und Rahmenelemente (13) zum Abstützen des Passagierfahrkorbs aufweist;
    einen Keil (55), der an dem hinaufsteigenden/absteigenden Körper (1) vorgesehen ist, um sich in einem Notfall entlang der Führungsschiene (11) nach oben relativ zu dem hinaufsteigenden/absteigenden Körper (1) zu versetzen;
    ein Drückelement (53) zum Drücken des Keils (55) auf die Führungsschiene (11) gemäß dem Drängen des elastischen Elements (52) ;
    eine Drückkrafteinstelleinrichtung aufweisend eine Keilpositionseinstelleinrichtung (56, 57, 80) zum Einstellen einer nach oben versetzten Anhalteposition des Keils (55), um die Drückkraft auf den Keil (55) in Abhängigkeit von der nach oben versetzten Anhalteposition des Keils (55) einzustellen,
    wobei die Drückkrafteinstelleinrichtung die Drückkraft auf den Keil (55) gemäß der Masse der Last auf den hinaufsteigenden/absteigenden Körper (1) einstellt, die beim Einsteigen und Aussteigen der Passagiere und in Abhängigkeit davon, ob oder nicht der hinaufsteigende/absteigende Körper (1) an dem Aufhängungselement (7) fest hängt, schwankt,
    dadurch gekennzeichnet, dass der hinaufsteigende/absteigende Körper (1) mit den elastischen Elementen (4) versehen ist, um elastisch den Passagierfahrkorb (2) an den Rahmenelementen (3) abzustützen; und
    die Keilpositionseinstelleinrichtung (56, 57, 80) die nach oben versetzte Anhalteposition des Keils (55) gemäß dem Betrag einstellt, um den der Passagierfahrkorb sich vertikal aufgrund des Versatzes der elastischen Elemente (4) versetzt, der durch die Lastmassenschwankung beim Ein- und Aussteigen der Passagiere aus dem Passagierfahrkorb (2) hervorgerufen wird.
  4. Aufzugssicherheitseinrichtung (12) nach Anspruch 1, 2 oder 3, bei der die Keilpositionseinstelleinrichtung (56, 57, 80) die nach oben versetzte Anhalteposition des Keils (55) durch Einstellen der vertikalen Position, wenn ein Anschlag an dem oberen Abschnitt des Keils (55) anliegt, einstellt.
  5. Aufzugssicherheitseinrichtung (12) nach Anspruch 4, ferner aufweisend eine Anschlagfixierungseinrichtung zum Fixieren des Anschlags in seiner eingestellten vertikalen Position.
  6. Aufzugssicherheitseinrichtung (12) nach Anspruch 5, bei der die Anschlagfixierungseinrichtung den Anschlag fixiert, wenn der Passagierfahrkorb geschlossen wurde.
  7. Aufzugssicherheitseinrichtung (12) nach einem der Ansprüche 4 bis 6, ferner aufweisend:
    ein Einrückelement (70) zum Einrücken in den Anschlag in seiner eingestellten vertikalen Position;
    einen Einrückelementbetätigungsmechanismus zum Betätigen des Einrückelements (70) gemeinsam mit der Passagierfahrkorbtüre (19).
  8. Aufzugssicherheitseinrichtung (12) nach Anspruch 1, 2 oder 3, bei der
    der Betrag des vertikalen Versatzes des Passagierfahrkorbes aufgrund der Störung des elastischen Elementes (4) durch einen Lastwichtungssensor (5) gemessen wird; und
    die vertikale Position des Anschlags gemäß der Lastwichtungssensormessung (5) eingestellt wird.
  9. Aufzugssicherheitseinrichtung (12) nach Anspruch 1, 2 oder 3, bei der ein Verbindungsmechanismus (83) verwendet wird, um die vertikale Position des Anschlags gemäß dem vertikalen Versatz des Passagierfahrkorbs (2) aufgrund eines Versatzes des elastischen Elements (4) einzustellen.
EP04807079.1A 2004-12-15 2004-12-15 Aufzug-not-stopp-vorrichtung Expired - Fee Related EP1826168B1 (de)

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PCT/JP2004/018720 WO2006064555A1 (ja) 2004-12-15 2004-12-15 エレベータ非常止め装置

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JPH0543150A (ja) * 1991-08-20 1993-02-23 Hitachi Ltd エレベータ
JP2001002342A (ja) 1999-06-21 2001-01-09 Toshiba Elevator Co Ltd エレベーター用非常止め装置
DK1294631T3 (da) * 2000-05-25 2004-11-22 Inventio Ag Bremseindretning til en elevator
JP4566337B2 (ja) * 2000-06-02 2010-10-20 三菱電機株式会社 エレベータ用非常止め装置
CA2407861C (en) * 2000-06-22 2009-02-24 Oliver Simmonds Brake arresting device with adaptable brake force for a lift
TW513374B (en) * 2000-12-08 2002-12-11 Inventio Ag Safety brake with retardation-dependent braking force
JP2004224492A (ja) * 2003-01-22 2004-08-12 Fujitec Co Ltd エレベータ装置

Also Published As

Publication number Publication date
EP1826168A1 (de) 2007-08-29
EP1826168A4 (de) 2012-02-15
CN1960931A (zh) 2007-05-09
WO2006064555A1 (ja) 2006-06-22
EP2517998B1 (de) 2014-04-02
EP2517998A1 (de) 2012-10-31
JPWO2006064555A1 (ja) 2008-06-12
JP4710834B2 (ja) 2011-06-29
CN1960931B (zh) 2011-04-20

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