EP1616831B1 - Elevator comprising a brake-releasing device for elevator hoist - Google Patents
Elevator comprising a brake-releasing device for elevator hoist Download PDFInfo
- Publication number
- EP1616831B1 EP1616831B1 EP04721634A EP04721634A EP1616831B1 EP 1616831 B1 EP1616831 B1 EP 1616831B1 EP 04721634 A EP04721634 A EP 04721634A EP 04721634 A EP04721634 A EP 04721634A EP 1616831 B1 EP1616831 B1 EP 1616831B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elevator
- inner wire
- brake
- operation lever
- outer tube
- 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
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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
- B66B5/027—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes
Definitions
- the present invention relates to an elevator comprising a brake release apparatus of an elevator hoist, which is used for releasing a brake of an elevator hoist when the elevator hoist cannot be driven.
- an elevator hoist (hereinafter also referred to as "hoist") becomes impossible because of an earthquake, a power failure, a breakdown of the elevator or the like.
- a car stops between floors and a rescue operation is carried out by manually releasing a brake of the hoist so as to vertically move the car to an elevator hall.
- a rescue operation mechanism (see, for example, Japanese Patent Laid-Open Publication No. 2001-233563 ) is known, in which a brake wire is pulled during a rescue operation to release a brake by drawing an end of the brake wire to an elevator hall floor, and pushing down a foot lever temporarily installed on the elevator hall floor.
- Another apparatus includes a brake release wire disposed between a hoist and a manual operation part of an elevator, a pinion fixed on a rotary shaft of the hoist, a rack meshed with the pinion, a meshing wire for displacing the rack to a meshing position, and a manual driving wire for longitudinally reciprocating the rack.
- a brake release lever, a manual driving lever, and a meshing lever, which are for operating these wires, are secured to an indicator box located in an elevator hall.
- a braking force setting apparatus of a hoist (see, for example, Japanese Patent Laid-Open Publication No. 2001-294386 ) is known, which is installed during a rescue operation on an elevator hall floor near a lower part of an elevator shaft, and includes a lever mechanism for independently pulling two pairs of brake wires disposed on a hoist.
- an outer tube of a brake wire of a hoist is secured to a structure such as a frame, and an end of an inner wire is connected to a lever so that the inner wire is pulled relative to the outer tube by a rotation of the lever.
- a male screw is formed outside an end part of the outer tube so as to secure the outer tube to the structure by a nut.
- the brake wire must be loosened in the elevator shaft in order to draw the terminal of the brake wire to the elevator hall floor.
- the loosened wire might become entangled with the car.
- a part of the brake wire might bulge toward a car, or the brake wire may move because a tension is applied thereto. Then, the brake wire might become entangled with the car being guided.
- a relatively large operation lever is needed to release a brake of a hoist, because a force in a range of from several hundred N to 1 kN or above must be applied to an operation wire over a stroke of several tens of millimeters.
- a lever for pulling an inner wire of a brake wire is rotated about its supporting axis.
- a direction to which the inner wire is pulled and a direction to which the outer tube is fixed might be misaligned. Then, it is likely that a friction force between the inner wire and the outer tube is increased, and thus, a smooth operation cannot be achieved, or further, the inner wire is damaged so that the safety of the rescue operation deteriorates.
- one of the effective solutions is to extend a distance between a position where the inner wire is pulled and a rotational center of the lever.
- this solution causes the lever to be elongated as a whole.
- the brake release apparatus becomes larger, which produces such disadvantages that a larger storing space is needed, and that the design thereof deteriorates.
- the other effective solution is to constitute the brake such that the brake can be released with a shorter stroke, which causes a pulling force to be increased.
- a thicker wire is needed, and the constitution of the brake is enlarged. With a shorter stroke and an increased pulling force, a fine adjustment of the pulling force becomes difficult, and it might be difficult to execute a rescue operation in a stable manner.
- W02002/30800 A1 discloses an elevator with a driving machine for raising and lowering an elevator car.
- the driving machine is connected to a break release plate via break release wires.
- the break release plate can be pivoted by a break release lever. The motion thereof is transferred to the driving machine by means of the break release wires to release a break mechanism for the driving machine.
- the outer tube rotation supporting means when the inner wire is pulled by rotating the operation lever, the outer tube rotation supporting means is rotated and the outer tube is constantly oriented to a direction where the inner wire is pulled.
- a friction force cannot be applied between an inner surface of the end part of the outer tube and the inner wire, and therefore a smooth operation can be achieved and an operation reliability is increased.
- an operation angle of the operation lever can be increased, and therefore an operation stroke of the operation lever can be increased even if the length of the operation lever is small.
- the apparatus itself can be more compact.
- Fig. 6 is a diagrammatic view showing an example of an elevator.
- An elevator 100 includes a car 104 disposed in a vertically movable manner in an elevator shaft 101 of a building, and an elevator hoist (also referred to as "hoist") 102 disposed in an upper part of the elevator shaft 101.
- a rope 103 pending from the hoist 102 is passed round driven sheaves 105 disposed under the car 104, and one end of the rope 103 is supported near an upper end of the elevator shaft 101.
- the rope 103 pending from the hoist 102 is passed round a sheave 107 built on an upper part of a counterweight 106, and the other end of the rope 103 is supported near an upper end of the elevator shaft 101.
- An elevator hall 108 of each floor includes a floor 109, a wall 110, and an elevator hall door 111.
- FIG. 1 A brake release apparatus of an elevator hoist is described with reference to Fig. 1 .
- the elevator shaft 101 is shown on the left, and the elevator hall 108 is shown on the right.
- the hoist 102 includes an emergency brake 102a.
- a brake release apparatus of an elevator hoist according to the present invention releases the brake 102a of the hoist 102 from a side of the elevator hall 108.
- the brake release apparatus includes: a storage box (housing) 20 disposed on the wall 110 near the elevator hall 108, and incorporating therein a frame 30; a flexible outer tube 11 extending between the brake 102a of the hoist 102 and the storage box 20; a flexible inner wire 12 extending in the outer tube 11; and an operation lever 40 rotatably disposed on the frame 30 in the storage box 20, and connected to the inner wire 12.
- the outer tube 11 and the inner wire 12 constitute a brake wire 10.
- One end 10a of the brake wire 10 is connected to the brake 102a, while the other end 10b of the brake wire 10 is guided to the frame 30 of the storage box 20.
- the storage box 20 is disposed on a position of the elevator hall 108 where an operator can open the elevator hall door 111 and operate the operation lever 40, while watching the car 104 in the elevator shaft 101.
- the frame 30 is secured in the storage box 20.
- the operation lever 40 is rotatably disposed relative to the frame 30.
- the outer tube 11 has an end fitting 11 a which is rotatably supported on the frame 30 through an outer tube securing shaft (first shaft-shaped member) 35.
- the inner wire 12 has an end fitting 12a which is supported on a middle part of the lever 40 through an inner wire connecting shaft (second shaft-shaped member) 46.
- the storage box 20 is provided with a cover 21, and thus an inside of the storage box 20 is invisible from the elevator hall 108.
- Fig. 2 is an outline view of the storage box 20 when viewed from an elevator hall.
- An indicator panel 112 having not shown call buttons is disposed on the wall 110 of the elevator hall 108.
- the storage box 20 with the cover 21 is disposed near the indicator panel 112.
- a key 22 is disposed on the cover 21.
- Figs. 3(a) to 3(d) respectively show the inner structure of the storage box 20.
- Fig. 3(a) is a side view showing the inner structure of the storage box 20.
- Fig. 3(b) is a front view thereof.
- Fig. 3(c) is an enlarged view of Fig. 3(b).
- Fig. 3(d) shows an outer tube securing shaft.
- the frame 30 includes a pair of frame plates 31 of the same shape, a frame block 32 sandwiched between the pair of frame plates 31, and bolts 33 for securing the pair of frame plates 31 to each other.
- the frame block 32 is secured on a stationary board 113 disposed in the wall 110 by four bolts 34.
- the operation lever 40 is supported inside the pair of frame plates 31 in a swingable manner about a lever rotation shaft 41 attached to the respective frame plates 31.
- the operation lever 40 includes a pair of lever plates 42 of the same shape, a spacer 43 sandwiched between the pair of lever plates 42, and a bolt 44 for securing the pair of lever plates 42 to each other.
- Each of the lever plates 42 has a hole 42a at its end.
- a supplemental pipe (additional lever) 45 can be connected to the operation lever 40 through the holes 42a.
- the supplemental pipe 45 is stored in the storage box 20.
- a screw 13 is formed outside the end fitting 11 a of the outer tube 11.
- the outer tube securing shaft 35 has a hole which is perpendicular to a shaft axis of the outer tube securing shaft 35. With the end fitting 11a being inserted in the hole, two nuts 14 are screwed to be engaged with the screw 13, so that the end fitting 11 a is secured to the outer tube securing shaft 35.
- the outer tube securing shaft 35 is rotatably supported relative to the frame plates 31.
- the outer tube securing shaft 35 has two planar machining surfaces 35a with which the nuts 14 are in contact. Lock rings 35b are attached on both ends of the outer tube securing shaft 35.
- a screw 15 is formed at an end of the end fitting 12a of the inner wire 12.
- the end fitting 12a passes through a hole perpendicular to a shaft axis of the inner wire connecting shaft 46.
- a nut 16 is attached on an end of the screw 15.
- the inner wire connecting shaft 46 is rotatably supported relative to the two lever plates 42.
- a planar machining surface 46a of the inner wire connecting shaft 46 is provided, with which the nut 16 is to be in contact.
- Lock rings 46b are attached on both ends of the inner wire connecting shaft 46. In Figs 3(a) to 3(d) , the machining surface 46a of the inner wire connecting shaft 46 and the nut 16 are not in contact with each other, with a slight allowance therebetween.
- the car 104 stops between the floors with the brake 102 of the hoist 102 being operated, and a rescue operation of passengers in the car 104 is carried out by the following steps.
- an operator slightly opens the door 111 of the elevator hall 108 on the floor near the hoist 102, so that an inside of the elevator shaft 101 is visible.
- Figs. 4(a) to 4(c) are side views showing an inside of the storage box 20 in a perspective manner.
- Fig. 4(a) shows the storage box 20 covered with the cover 21.
- the reference symbol G indicates a length of an allowance between the machining surface 46a of the inner wire connecting shaft 46 and the nut 16.
- FIGS. 5(a) to 5(c) are schematic views showing operations of the operation lever 40 to which the supplemental pipe 45 is connected.
- a state shown in Fig. 5(a) is changed into that shown in Fig. 5(b).
- Fig. 5(c) shows a state in which the operation lever 40 is further pulled down.
- an end of the inner wire 12 is moved in an arcuate manner. Since the outer tube securing shaft 35 is rotatable relative to the frame 30, the end fitting 11 a of the outer tube 11 is constantly oriented to a direction where the inner wire is pulled. Since the inner wire connecting shaft 46 is also rotatably supported relative to the operation lever 40, no bending load is applied to the inner wire 12, when the operation lever 40 is rotated.
- the operator continually pulls down the operation lever 40, while watching the car 104 in the elevator shaft 101.
- a speed of the car 104 is suitably adjusted as the brake 102a is released, so as to guide the car 104 to a front surface of the elevator hall 108.
- the elevator hall door 111 and the door of the car 104 are opened, and the passengers are rescued.
- the brake 102a of the brake 102 can be released only by connecting the supplemental pipe 45 to the operation lever 40 in the storage box 20 disposed on the wall 111 of the elevator hall 108, and pulling down the supplemental pipe 45.
- the brake 102a of the brake 102 can be released only by connecting the supplemental pipe 45 to the operation lever 40 in the storage box 20 disposed on the wall 111 of the elevator hall 108, and pulling down the supplemental pipe 45.
- the outer tube securing shaft 35 is rotated relative to the frame 30 so as to be constantly oriented to a direction where the inner wire 12 is pulled.
- a friction force can not be applied, so that a smooth operation can be achieved.
- a damage of the inner wire 12 is prevented, and a sufficient reliability can be obtained.
- an operation angle of the operation lever 40 can be increased, a pulling action with a larger stroke can be realized without using an elongated lever. Consequently, the apparatus can be made more compact and smaller. Since a fine adjustment of a pulling force is permitted, an excellent operability is provided.
- the inner wire connecting shaft 46 is rotated relative to the frame 30.
- an operation angle of the operation lever 40 is increased, no excessive bending load is applied to an end of the inner wire 12, and thus a smooth operation can be achieved.
- the above embodiment exemplifies one supplemental pipe 45 to be connected to the operation lever 40.
- two or more supplemental pipes 45 may be connected to the operation lever 40 so as to suitably reduce a force required for operating the operation lever 40.
- the operation lever may be extended by using a foldable link mechanism or a stretchable lever. Alternatively, the operator can carry a lever for extension with him or her.
- the outer tube securing shaft 35 and the inner wire connecting shaft 46 are supported by the frame plates 31 and the lever plate 42 to be directly contacted with each other.
- a lubricant or a bearing to further reduce a frictional force, a more smooth operation can be realized.
- the above embodiment exemplifies a case in which the hoist 102 is disposed in an upper part of the elevator shaft 101 with reference to Fig. 6 .
- the same effects can be obtained, if the hoist 102 is disposed on a pit of the elevator shaft 101, on other parts of the elevator shaft 101, or in a machineroom.
- a rescue operation can be carried out in a quick and safe manner. Even when a car is located near the elevator hall, a rescue operation can be carried out without problem. Further, since there is no need for the brake wire to be loosened in an elevator shaft, and the brake wire would not bulge in the elevator shaft during a rescue operation, a brake release apparatus of an elevator hoist with a high security can be provided. In addition, since an operation angle of an operation lever can be increased, a pulling action with a sufficient stroke can be achieved without elongating the operation lever, and thus an operability can be improved. Since a housing for storing the operation lever can be made small, a deterioration of design is prevented.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
- Braking Arrangements (AREA)
Abstract
Description
- The present invention relates to an elevator comprising a brake release apparatus of an elevator hoist, which is used for releasing a brake of an elevator hoist when the elevator hoist cannot be driven.
- During the operation of an elevator, it is possible that the operation of an elevator hoist (hereinafter also referred to as "hoist") becomes impossible because of an earthquake, a power failure, a breakdown of the elevator or the like. In this situation, a car stops between floors and a rescue operation is carried out by manually releasing a brake of the hoist so as to vertically move the car to an elevator hall.
- Various apparatus for manually releasing a brake of a hoist have been proposed. For example, a rescue operation mechanism (see, for example, Japanese Patent Laid-Open Publication No.
2001-233563 - Another apparatus (see, for example, Japanese Patent Laid-Open Publication No.
2001-122547 - A braking force setting apparatus of a hoist (see, for example, Japanese Patent Laid-Open Publication No.
2001-294386 - In all the above-described inventions, an outer tube of a brake wire of a hoist is secured to a structure such as a frame, and an end of an inner wire is connected to a lever so that the inner wire is pulled relative to the outer tube by a rotation of the lever. A male screw is formed outside an end part of the outer tube so as to secure the outer tube to the structure by a nut.
- In the above-described prior art, in installing a brake release apparatus near an elevator hall floor, if a car is located near the elevator hall, there may be a case in which a terminal of a brake wire disposed in an elevator shaft cannot be drawn to the elevator hall. If the drawing of the terminal of the brake wire out of the elevator shaft is somewhat troublesome or time-consuming, the rescue may be delayed.
- The brake wire must be loosened in the elevator shaft in order to draw the terminal of the brake wire to the elevator hall floor. However, the loosened wire might become entangled with the car. In addition, by drawing the brake wire to the elevator hall, a part of the brake wire might bulge toward a car, or the brake wire may move because a tension is applied thereto. Then, the brake wire might become entangled with the car being guided.
- In general, a relatively large operation lever is needed to release a brake of a hoist, because a force in a range of from several hundred N to 1 kN or above must be applied to an operation wire over a stroke of several tens of millimeters.
- Thus, when storing such an operation lever in a box of an indicator in an elevator hall, the box must also be large, which results in a deterioration of the design.
- A lever for pulling an inner wire of a brake wire is rotated about its supporting axis. Thus, with the pulling action, a direction to which the inner wire is pulled and a direction to which the outer tube is fixed might be misaligned. Then, it is likely that a friction force between the inner wire and the outer tube is increased, and thus, a smooth operation cannot be achieved, or further, the inner wire is damaged so that the safety of the rescue operation deteriorates.
- In order to decrease a friction force between the inner wire and the outer tube, a misalignment of an angle must be reduced. That is, an operation angle of the lever must be reduced.
- In order to obtain a force and a stroke required for a pulling action, one of the effective solutions is to extend a distance between a position where the inner wire is pulled and a rotational center of the lever. However, this solution causes the lever to be elongated as a whole. Thus, the brake release apparatus becomes larger, which produces such disadvantages that a larger storing space is needed, and that the design thereof deteriorates.
- The other effective solution is to constitute the brake such that the brake can be released with a shorter stroke, which causes a pulling force to be increased. Here, there are the disadvantages that a thicker wire is needed, and the constitution of the brake is enlarged. With a shorter stroke and an increased pulling force, a fine adjustment of the pulling force becomes difficult, and it might be difficult to execute a rescue operation in a stable manner.
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W02002/30800 A1 - It is an object of the present invention to provide an elevator comprising a break release apparatus for an elevator with a reduced a friction force between the inner wire and the outer tube.
- The object is achieved by the elevator of claim 1. Further developments are given in the dependent claims.
- According to the present invention, when the inner wire is pulled by rotating the operation lever, the outer tube rotation supporting means is rotated and the outer tube is constantly oriented to a direction where the inner wire is pulled. Thus, a friction force cannot be applied between an inner surface of the end part of the outer tube and the inner wire, and therefore a smooth operation can be achieved and an operation reliability is increased.
- In addition, an operation angle of the operation lever can be increased, and therefore an operation stroke of the operation lever can be increased even if the length of the operation lever is small. As a result, the apparatus itself can be more compact.
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Fig. 1 is a diagrammatic view showing an embodiment of a brake release apparatus of an elevator hoist according to the present invention; -
Fig. 2 is an outline view of the brake release apparatus according to the present invention when viewed from an elevator hall; -
Figs. 3(a) to 3(d) are illustrational views showing in detail a structure of the brake release apparatus according to the present invention; -
Figs. 4(a) to 4(c) are illustrational views showing how a lever is connected to the brake release apparatus according to the present invention; -
Figs. 5(a) to 5(c) are illustrational views showing an operation of a lever of the brake release apparatus according to the present invention;
and -
Fig. 6 is a diagrammatic view showing an example of a structure of an elevator. - An embodiment of a brake release apparatus according to the present invention is described below with reference to the drawings.
- A general elevator is described with reference to
Fig. 6. Fig. 6 is a diagrammatic view showing an example of an elevator. - An
elevator 100 includes acar 104 disposed in a vertically movable manner in anelevator shaft 101 of a building, and an elevator hoist (also referred to as "hoist") 102 disposed in an upper part of theelevator shaft 101. Arope 103 pending from thehoist 102 is passed round drivensheaves 105 disposed under thecar 104, and one end of therope 103 is supported near an upper end of theelevator shaft 101. - The
rope 103 pending from thehoist 102 is passed round asheave 107 built on an upper part of acounterweight 106, and the other end of therope 103 is supported near an upper end of theelevator shaft 101. - An
elevator hall 108 of each floor includes afloor 109, awall 110, and anelevator hall door 111. - A brake release apparatus of an elevator hoist is described with reference to
Fig. 1 . InFig. 1 , theelevator shaft 101 is shown on the left, and theelevator hall 108 is shown on the right. - As shown in
Fig. 1 , thehoist 102 includes anemergency brake 102a. A brake release apparatus of an elevator hoist according to the present invention releases thebrake 102a of thehoist 102 from a side of theelevator hall 108. - That is, the brake release apparatus includes: a storage box (housing) 20 disposed on the
wall 110 near theelevator hall 108, and incorporating therein aframe 30; a flexibleouter tube 11 extending between thebrake 102a of thehoist 102 and thestorage box 20; a flexibleinner wire 12 extending in theouter tube 11; and anoperation lever 40 rotatably disposed on theframe 30 in thestorage box 20, and connected to theinner wire 12. - The
outer tube 11 and theinner wire 12 constitute abrake wire 10. Oneend 10a of thebrake wire 10 is connected to thebrake 102a, while theother end 10b of thebrake wire 10 is guided to theframe 30 of thestorage box 20. - By pulling the
inner wire 12 of thebrake wire 10 with theoperation lever 40, thebrake 102a of the hoist 102 is adapted to be released. Thestorage box 20 is disposed on a position of theelevator hall 108 where an operator can open theelevator hall door 111 and operate theoperation lever 40, while watching thecar 104 in theelevator shaft 101. - An inner structure of the storage box (housing) 20 is described. The
frame 30 is secured in thestorage box 20. Theoperation lever 40 is rotatably disposed relative to theframe 30. Theouter tube 11 has an end fitting 11 a which is rotatably supported on theframe 30 through an outer tube securing shaft (first shaft-shaped member) 35. Theinner wire 12 has an end fitting 12a which is supported on a middle part of thelever 40 through an inner wire connecting shaft (second shaft-shaped member) 46. Thestorage box 20 is provided with acover 21, and thus an inside of thestorage box 20 is invisible from theelevator hall 108. -
Fig. 2 is an outline view of thestorage box 20 when viewed from an elevator hall. Anindicator panel 112 having not shown call buttons is disposed on thewall 110 of theelevator hall 108. Thestorage box 20 with thecover 21 is disposed near theindicator panel 112. A key 22 is disposed on thecover 21. - The inner structure of the
storage box 20 is described further in detail with reference toFigs. 3(a) to 3(d). Figs. 3(a) to 3(d) respectively show the inner structure of thestorage box 20.Fig. 3(a) is a side view showing the inner structure of thestorage box 20.Fig. 3(b) is a front view thereof.Fig. 3(c) is an enlarged view ofFig. 3(b). Fig. 3(d) shows an outer tube securing shaft. - The
frame 30 includes a pair offrame plates 31 of the same shape, aframe block 32 sandwiched between the pair offrame plates 31, andbolts 33 for securing the pair offrame plates 31 to each other. Theframe block 32 is secured on astationary board 113 disposed in thewall 110 by fourbolts 34. - The
operation lever 40 is supported inside the pair offrame plates 31 in a swingable manner about alever rotation shaft 41 attached to therespective frame plates 31. Theoperation lever 40 includes a pair oflever plates 42 of the same shape, aspacer 43 sandwiched between the pair oflever plates 42, and abolt 44 for securing the pair oflever plates 42 to each other. Each of thelever plates 42 has ahole 42a at its end. A supplemental pipe (additional lever) 45 can be connected to theoperation lever 40 through theholes 42a. Thesupplemental pipe 45 is stored in thestorage box 20. - A
screw 13 is formed outside the end fitting 11 a of theouter tube 11. The outertube securing shaft 35 has a hole which is perpendicular to a shaft axis of the outertube securing shaft 35. With the end fitting 11a being inserted in the hole, twonuts 14 are screwed to be engaged with thescrew 13, so that the end fitting 11 a is secured to the outertube securing shaft 35. The outertube securing shaft 35 is rotatably supported relative to theframe plates 31. The outertube securing shaft 35 has twoplanar machining surfaces 35a with which the nuts 14 are in contact. Lock rings 35b are attached on both ends of the outertube securing shaft 35. - A
screw 15 is formed at an end of the end fitting 12a of theinner wire 12. The end fitting 12a passes through a hole perpendicular to a shaft axis of the innerwire connecting shaft 46. Anut 16 is attached on an end of thescrew 15. The innerwire connecting shaft 46 is rotatably supported relative to the twolever plates 42. Aplanar machining surface 46a of the innerwire connecting shaft 46 is provided, with which thenut 16 is to be in contact. Lock rings 46b are attached on both ends of the innerwire connecting shaft 46. InFigs 3(a) to 3(d) , themachining surface 46a of the innerwire connecting shaft 46 and thenut 16 are not in contact with each other, with a slight allowance therebetween. - An operation of the brake release apparatus thus constituted is described below with reference to
Figs. 4(a) to 4(c) andFigs. 5(a) to 5(c) . - When a hoist of an elevator cannot be driven because of errors or damages, the
car 104 stops between the floors with thebrake 102 of the hoist 102 being operated, and a rescue operation of passengers in thecar 104 is carried out by the following steps. - First, an operator slightly opens the
door 111 of theelevator hall 108 on the floor near the hoist 102, so that an inside of theelevator shaft 101 is visible. - Following steps are described with reference to
Figs. 4(a) to 4(c). Figs. 4(a) to 4(c) are side views showing an inside of thestorage box 20 in a perspective manner.Fig. 4(a) shows thestorage box 20 covered with thecover 21. The reference symbol G indicates a length of an allowance between themachining surface 46a of the innerwire connecting shaft 46 and thenut 16. - In
Fig. 4(a) , the key 22 of thestorage box 20 is unlocked to open thecover 21, and theoperation lever 40 is inclined toward the operator. Then, an end of theoperation lever 40 is projected out of thestorage box 20 to bring themachining surface 46a and thenut 16 in contact with each other (Fig. 4(b) ). At this time, the allowance (G) becomes zero, but no tension is applied to theinner wire 12. - Then, by using the
holes 42a at the end of the projectedoperation lever 40, thesupplemental pipe 45 is connected to theoperation lever 40 by bolts 47 (Fig. 4(c) ). - An operation for pulling the
inner wire 12 is described with reference toFigs. 5(a) to 5(c). Figs. 5(a) to 5(c) are schematic views showing operations of theoperation lever 40 to which thesupplemental pipe 45 is connected. - While watching the inside of the
elevator shaft 101 from a gap of theelevator hall door 111, the operator grasps an end part of thesupplemental pipe 45 to pull down the same. Then, a relative distance between the outertube securing shaft 35 and the innerwire connecting shaft 46 is increased, and thus theinner wire 12 is pulled relative to theouter tube 11. That is, a state shown inFig. 5(a) is changed into that shown inFig. 5(b). Fig. 5(c) shows a state in which theoperation lever 40 is further pulled down. - In accordance with an inclination of the
operation lever 40, an end of theinner wire 12 is moved in an arcuate manner. Since the outertube securing shaft 35 is rotatable relative to theframe 30, the end fitting 11 a of theouter tube 11 is constantly oriented to a direction where the inner wire is pulled. Since the innerwire connecting shaft 46 is also rotatably supported relative to theoperation lever 40, no bending load is applied to theinner wire 12, when theoperation lever 40 is rotated. - When the
inner wire 12 is pulled, thebrake 102a of the hoist 102 is released. Thus, a heavier one of thecar 104 and thecounterweight 106 is lowered. If weights of thecar 104 and thecounterweight 106 are counterbalanced, in order that their weights are not counterbalanced, a weight of thecounterweight 106 is made heavier or lighter to apply a load to either one of thecar 104 or thecounterweight 106 by means of a method which is not described in detail. - In this way, the operator continually pulls down the
operation lever 40, while watching thecar 104 in theelevator shaft 101. Through this operation, a speed of thecar 104 is suitably adjusted as thebrake 102a is released, so as to guide thecar 104 to a front surface of theelevator hall 108. Thereafter, theelevator hall door 111 and the door of thecar 104 are opened, and the passengers are rescued. - As described above, the following effects are obtained according to the embodiment of the present invention.
- The
brake 102a of thebrake 102 can be released only by connecting thesupplemental pipe 45 to theoperation lever 40 in thestorage box 20 disposed on thewall 111 of theelevator hall 108, and pulling down thesupplemental pipe 45. Thus, there is no need to draw the brake wire to a floor of the elevator hall. Even when the car is located near the elevator hall floor, an operation can be securely carried out without problem. Further, since there is no need for the brake wire to be loosened in the elevator shaft, and the brake wire would not bulge in the elevator shaft during a rescue operation, a security can be improved. - In accordance with a rotation of the
operation lever 40, the outertube securing shaft 35 is rotated relative to theframe 30 so as to be constantly oriented to a direction where theinner wire 12 is pulled. Thus, between an inner surface of the end part of theouter tube 11 and theinner wire 12, a friction force can not be applied, so that a smooth operation can be achieved. As a result, a damage of theinner wire 12 is prevented, and a sufficient reliability can be obtained. - Since an operation angle of the
operation lever 40 can be increased, a pulling action with a larger stroke can be realized without using an elongated lever. Consequently, the apparatus can be made more compact and smaller. Since a fine adjustment of a pulling force is permitted, an excellent operability is provided. - The inner
wire connecting shaft 46 is rotated relative to theframe 30. Thus, when an operation angle of theoperation lever 40 is increased, no excessive bending load is applied to an end of theinner wire 12, and thus a smooth operation can be achieved. - By providing an allowance with the
inner wire 12, a play is given to an angle of theoperation lever 40 when stored in thestorage box 40, and an angle of theoperation lever 40 when thesupplemental pipe 45 is connected to theoperation lever 40. Thus, in connecting thesupplemental pipe 45 to theoperation lever 40, theinner wire 12 is prevented from mistakenly pulled. As a result, a favorable security and operability can be obtained. In addition, since theoperation lever 40 and thesupplemental pipe 45 can be stored in thestorage box 20 by fully using a space thereof, the small storage space in thestorage box 20 can be effectively utilized, and thestorage box 20 can be made smaller. - The above embodiment exemplifies one
supplemental pipe 45 to be connected to theoperation lever 40. However, not limited thereto, two or moresupplemental pipes 45 may be connected to theoperation lever 40 so as to suitably reduce a force required for operating theoperation lever 40. The operation lever may be extended by using a foldable link mechanism or a stretchable lever. Alternatively, the operator can carry a lever for extension with him or her. - In the above embodiment, the outer
tube securing shaft 35 and the innerwire connecting shaft 46 are supported by theframe plates 31 and thelever plate 42 to be directly contacted with each other. However, by using a lubricant or a bearing to further reduce a frictional force, a more smooth operation can be realized. - The above embodiment exemplifies a case in which the hoist 102 is disposed in an upper part of the
elevator shaft 101 with reference toFig. 6 . However, the same effects can be obtained, if the hoist 102 is disposed on a pit of theelevator shaft 101, on other parts of theelevator shaft 101, or in a machineroom. - As described above, according to the present invention, since there is no need to draw a brake wire to an elevator hall, a rescue operation can be carried out in a quick and safe manner. Even when a car is located near the elevator hall, a rescue operation can be carried out without problem. Further, since there is no need for the brake wire to be loosened in an elevator shaft, and the brake wire would not bulge in the elevator shaft during a rescue operation, a brake release apparatus of an elevator hoist with a high security can be provided. In addition, since an operation angle of an operation lever can be increased, a pulling action with a sufficient stroke can be achieved without elongating the operation lever, and thus an operability can be improved. Since a housing for storing the operation lever can be made small, a deterioration of design is prevented.
Claims (6)
- An elevator comprising a brake release apparatus of an elevator hoist for releasing a brake (102a) of an elevator hoist (102) disposed in an elevator shaft from an elevator hall having an elevator hall door so as to guide a ear, comprising:a housing (20) disposed near the elevator hall, and incorporating therein a frame (30);an outer tube (11) connectable to the brake (102a) of the elevator hoist (102) and the housing;an inner wire (12) extending in the outer tube (11); andan operation lever (40) rotatably disposed on the frame (30) in the housing (20), and connected to the inner wire (12), andwherein the inner wire (12) has one end connected to the operation lever (40) via
an inner wire rotation supporting means, such that the inner wire (12) is rotatably supported relative to the operation lever (40), characterized in thatthe outer tube (11) is connected to the frame (30) via an outer tube rotation supporting means, such that the outer tube (11) is rotatably supported relative to the frame (30). - The elevator according to claim 1, wherein
the outer tube rotation supporting means includes a first shaft-shaped member (35) through which the outer tube (11) passes in a direction perpendicular to a shaft axis of the first shaft-shaped member (35), and
the inner wire rotation supporting means includes a second shaft-shaped member (46) through which the inner wire (12) passes in a direction perpendicular to a shaft axis of the second shaft-shaped member (46). - The elevator according to claim 1, further comprising
an additional lever (45) for extension connectable to the operation lever. - The elevator according to claim 3, wherein the housing (20) and the additional lever (45) are configured such that
the additional lever (45) when detached from the operation lever (40) is storable in the housing (20). - The elevator according to claim 1, wherein
when the operation lever (40) is in the housing (20), the one end of the inner wire (12) is separated from the operation lever (40), and when the operation lever (40) is out of the housing (20), the one end of the inner wire (12) is connected to the operation lever (40). - The elevator according to claim 1, wherein
the housing (20) is disposed on a position of the elevator hall (108) where an operator can open the elevator hall door (111) and operate the operation lever (40) while watching the car (104) in the elevator shaft (101).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003105363A JP4299043B2 (en) | 2003-04-09 | 2003-04-09 | Brake release device for elevator hoisting machine and operation method thereof |
PCT/JP2004/003632 WO2004089801A1 (en) | 2003-04-09 | 2004-03-18 | Brake-releasing device for elevator hoist and method of operating the same |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1616831A1 EP1616831A1 (en) | 2006-01-18 |
EP1616831A4 EP1616831A4 (en) | 2007-07-11 |
EP1616831B1 true EP1616831B1 (en) | 2011-03-09 |
Family
ID=33156877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04721634A Expired - Fee Related EP1616831B1 (en) | 2003-04-09 | 2004-03-18 | Elevator comprising a brake-releasing device for elevator hoist |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1616831B1 (en) |
JP (1) | JP4299043B2 (en) |
KR (1) | KR100651006B1 (en) |
CN (1) | CN100408461C (en) |
DE (1) | DE602004031720D1 (en) |
MY (1) | MY137379A (en) |
TW (1) | TWI247720B (en) |
WO (1) | WO2004089801A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11261056B2 (en) | 2018-12-20 | 2022-03-01 | Otis Elevator Company | Elevator safety actuator systems |
US11667495B2 (en) | 2018-05-03 | 2023-06-06 | Otis Elevator Company | Brake disc releasing device, turning device, elevator rescue kit and method |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4672337B2 (en) * | 2004-11-11 | 2011-04-20 | 三菱電機株式会社 | Brake release device for elevator hoisting machine |
JP2007062900A (en) * | 2005-08-30 | 2007-03-15 | Toshiba Elevator Co Ltd | Elevator system |
JP5327828B2 (en) * | 2007-09-03 | 2013-10-30 | 東芝エレベータ株式会社 | Brake release device for elevator hoisting machine and elevator system including the same |
CN102358544B (en) * | 2011-08-30 | 2013-09-11 | 昆山通祐电梯有限公司 | Elevator self rescuer |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB901389A (en) * | 1960-12-13 | 1962-07-18 | Morse Instr Co | Push-pull cable mounting bracket |
CN1063726C (en) * | 1996-07-09 | 2001-03-28 | 王秋楠 | Safety life saving device of elevator |
FI103498B1 (en) * | 1996-09-05 | 1999-07-15 | Kone Corp | Arrangements to relieve the brake of a lift machine |
JP4291457B2 (en) * | 1999-04-30 | 2009-07-08 | 東芝エレベータ株式会社 | Brake release device for elevator hoisting machine |
JP2001122547A (en) * | 1999-10-21 | 2001-05-08 | Mitsubishi Electric Corp | Manual operation device for elevator hoist |
JP2001233563A (en) * | 2000-02-18 | 2001-08-28 | Mitsubishi Electric Corp | Rescue operation device for traction type elevator and its method |
JP4421069B2 (en) * | 2000-04-10 | 2010-02-24 | 三菱電機株式会社 | Elevator hoisting machine braking force setting device |
JPWO2002030800A1 (en) * | 2000-10-10 | 2004-02-19 | 三菱電機株式会社 | Elevator and car position confirmation device |
-
2003
- 2003-04-09 JP JP2003105363A patent/JP4299043B2/en not_active Expired - Fee Related
-
2004
- 2004-03-18 EP EP04721634A patent/EP1616831B1/en not_active Expired - Fee Related
- 2004-03-18 WO PCT/JP2004/003632 patent/WO2004089801A1/en active Application Filing
- 2004-03-18 DE DE602004031720T patent/DE602004031720D1/en not_active Expired - Lifetime
- 2004-03-18 KR KR1020057006526A patent/KR100651006B1/en not_active IP Right Cessation
- 2004-03-18 CN CNB2004800014102A patent/CN100408461C/en not_active Expired - Lifetime
- 2004-04-08 TW TW093109743A patent/TWI247720B/en not_active IP Right Cessation
- 2004-04-08 MY MYPI20041281A patent/MY137379A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11667495B2 (en) | 2018-05-03 | 2023-06-06 | Otis Elevator Company | Brake disc releasing device, turning device, elevator rescue kit and method |
US11261056B2 (en) | 2018-12-20 | 2022-03-01 | Otis Elevator Company | Elevator safety actuator systems |
Also Published As
Publication number | Publication date |
---|---|
KR20050067415A (en) | 2005-07-01 |
TWI247720B (en) | 2006-01-21 |
CN1705611A (en) | 2005-12-07 |
EP1616831A4 (en) | 2007-07-11 |
KR100651006B1 (en) | 2006-11-30 |
DE602004031720D1 (en) | 2011-04-21 |
EP1616831A1 (en) | 2006-01-18 |
CN100408461C (en) | 2008-08-06 |
JP2004307181A (en) | 2004-11-04 |
JP4299043B2 (en) | 2009-07-22 |
WO2004089801A1 (en) | 2004-10-21 |
MY137379A (en) | 2009-01-30 |
TW200426104A (en) | 2004-12-01 |
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