EP1591399B1 - Elevator equipment - Google Patents
Elevator equipment Download PDFInfo
- Publication number
- EP1591399B1 EP1591399B1 EP02807743A EP02807743A EP1591399B1 EP 1591399 B1 EP1591399 B1 EP 1591399B1 EP 02807743 A EP02807743 A EP 02807743A EP 02807743 A EP02807743 A EP 02807743A EP 1591399 B1 EP1591399 B1 EP 1591399B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- car
- main body
- counterweight
- balance
- rope
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
- B66B11/026—Attenuation system for shocks, vibrations, imbalance, e.g. passengers on the same side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/0065—Roping
- B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
Definitions
- the present invention relates to an elevator apparatus in which a single car is raised and lowered by a driving force from first and second driving machines.
- FIG 11 is a structural diagram showing a conventional elevator apparatus such as that shown in EP 1 006 071 A1 , for example.
- a machine room 2 is disposed in an upper portion of a hoistway 1.
- First and second driving machines 3 and 4 are installed in the machine room 2.
- the first driving machine 3 has: a first driving machine main body 3A including a motor and a brake; and a first drive sheave 5 rotated by the first driving machine main body 3A.
- the second driving machine 4 has: a second driving machine main body 4A including a motor and a brake; and a second drive sheave 6 rotated by the second driving machine main body 4A.
- a plurality of main ropes 7 are wound around the first drive sheave 5 and the second drive sheave 6.
- the main ropes 7 have first end portions 7a and second end portions 7b.
- a first counterweight 8 is suspended by the first end portions 7a.
- a second counterweight 9 is suspended by the second end portions 7b.
- the first and second end portions 7a and 7b are connected to the first and second counterweights 8 and 9 by means of rope terminal springs 15 and 16.
- a car 10 is suspended by intermediate portions of the main ropes 7.
- a suspension sheave beam 11 is secured horizontally to a lower portion of the car 10.
- Suspension sheaves 12 and 13 around which the main ropes 7 are wound are mounted to the suspension sheave beam 11.
- the main ropes 7 are secured to a central portion of the suspension sheave beam 11 by means of a rope securing portion 14.
- the car 10 and the counterweights 8 and 9 are raised and lowered inside the hoistway 1 by the first and second drive sheaves 5 and 6 being rotated in opposite directions to each other.
- the main ropes 7 are secured to the suspension sheave beam 11 by means of the rope securing portion 14, there is no movement of the main ropes 7 relative to the car 10.
- the main ropes 7 may also be connected to the suspension sheave beam 11 so as to allow for some displacement, but in that case, the movement of the main ropes 7 relative to the car 10 is slight, and there is still a risk that tilting may occur in the car 10.
- Document JP 2001/261257 A discloses an elevator apparatus having two winding machines disposed at a space in the upper part of a hoistway, and the car is suspended by two ropes.
- the deflector wheels are disposed outside of a projection area in which the car is vertically projected in the hoistway.
- the present invention aims to solve the above problems and an object of the present invention is to provide an elevator apparatus enabling reductions in operating performance to be prevented by preventing tilting from arising in a car due to differences between first and second driving machines.
- an elevator apparatus according to claim 1.
- a machine room 2 is disposed in an upper portion of a hoistway 1.
- First and second driving machines 3 and 4 are installed in the machine room 2.
- the first driving machine 3 has: a first driving machine main body 3A including a motor and a brake; and a first drive sheave 5 rotated by the first driving machine main body 3A.
- the second driving machine 4 has: a second driving machine main body 4A including a motor and a brake; and a second drive sheave 6 rotated by the second driving machine main body 4A.
- the first and second driving machines 3 and 4 are disposed such that the first driving machine main body 3A and the second driving machine main body 4A face each other, that is, such that the first and second drive sheaves 5 and 6 face outward.
- the first and second drive sheaves 5 and 6 are disposed such that rotating shafts thereof extend horizontally in a direction of frontage of the hoistway 1 (left-to-right in Figure 2 ).
- the orientation of the driving machines 3 and 4 in Figure 1 is different from that in Figure 2 because Figure 1 is a developed view.
- a main rope body 20 which is a composite body of main ropes is wound around the first drive sheave 5 and the second drive sheave 6.
- the main rope body 20 has: a plurality of first main ropes 21 wound around the first drive sheave 5; and a plurality of second main ropes 22 wound around the second drive sheave 6.
- Each of the first main ropes 21 has: a first car end portion 21a; and a first counterweight end portion 21b.
- Each of the second main ropes 22 has: a second car end portion 22a; and a second counterweight end portion 22b.
- a first counterweight 8 is suspended by the first counterweight end portions 21b.
- a second counterweight 9 is suspended by the second counterweight end portions 22b.
- the first and second counterweight end portions 21b and 22b are connected to the first and second counterweights 8 and 9 by means of rope terminal springs 15 and 16.
- a car 10 is suspended by the first and second car end portions 21a and 22a.
- a balance mechanism 23 is mounted to a lower portion of the car 10.
- the balance mechanism 23 has: a pivoting shaft 24 extending horizontally in a depth direction of the car 10 (top-to-bottom in Figure 2 ); and a balance main body 25 that is pivotable around the pivoting shaft 24.
- the balance main body 25 has: a first rope connection portion 25a positioned at one longitudinal end portion; and a second rope connection portion 25b positioned on an opposite side of the pivoting shaft 24 from the first rope connection portion 25a, that is, at another longitudinal end portion.
- the first car end portions 21a are connected to the first rope connection portion 25a.
- the second car end portions 22a are connected to the second rope connection portion 25b.
- Absorption springs 26 and 27 for absorbing changes in connection angle between the first and second rope connection portions 25a and 25b and the first and second car end portions 21a and 22a due to inclination of the balance main body 25 are disposed between the first rope connection portion 25a and the first car end portions 21a and between the second rope connection portion 25b and the second car end portions 22a, respectively.
- a pair of car guide rails 28 for guiding ascent and descent of the car 10, a pair of first counterweight guide rails 29 for guiding ascent and descent of the first counterweight 8, and a pair of second counterweight guide rails 30 for guiding ascent and descent of the second counterweight 9 are installed inside the hoistway 1.
- the first and second counterweights 8 and 9 are disposed so as to be positioned on mutually opposite sides of the car 10 on left and right sides of the car 10 .
- each of the driving machines 3 and 4 can be prevented compared to when a single driving machine is used, enabling the driving machines to be standardized for elevator apparatuses having a small car capacity through to large elevator apparatuses.
- absorption springs 26 and 27 are disposed between the first and second rope connection portions 25a and 25b and the first and second car end portions 21a and 22a, respectively, changes in connection angle between the first and second rope connection portions 25a and 25b and the first and second car end portions 21a and 22a due to inclination of the balance main body 25 are absorbed, and rods of the first and second car end portions 21a and 22a, the balance main body 2, etc., are not subjected to unbearable force, enabling the generation of stress to be suppressed.
- Figure 3 is a developed structural diagram showing an elevator apparatus according to Embodiment 2 of the present invention.
- a balance mechanism 23 similar to that of Embodiment 1 is mounted to an upper portion of a car 10.
- the rest of the construction is similar to that of Embodiment 1.
- Figure 4 is a plan showing an elevator apparatus according to Embodiment 3 of the present invention
- Figure 5 is a cross section taken along line V - V in Figure 4
- a horizontal layout of major equipment is shown with a floor of a machine room omitted.
- first and second driving machines 3 and 4 are disposed such that rotating shafts of first and second drive sheaves 5 and 6 extend horizontally so as to be inclined relative to a direction of frontage of a hoistway 1.
- a car 10 is suspended on first and second car end portions 21a and 22a of first and second main ropes 21 and 22 by means of a balance mechanism 23, in a similar manner to Embodiment 1.
- a counterweight 31 is suspended on first and second counterweight end portions 21b and 22b of the first and second main ropes 21 and 22 by means of a balance mechanism 23 that is similar to that for the car 10.
- Embodiment 1 two counterweights 8 and 9 are used, but in Embodiment 2, only one counterweight 31 is used.
- the balance mechanism 23 for the counterweight 31 may be somewhat different from the balance mechanism 23 for the car 10 in size, etc., but because it is similar in function, it has been allocated an identical numeral in the figures for simplicity.
- the balance mechanism 23 for the counterweight 31 is mounted to an upper portion of the counterweight 31.
- the first counterweight end portions 21b of the first main ropes 21 are connected to the first rope connection portion 25a of the balance main body 25 for the counterweight 31 by means of an absorption spring 33.
- the second counterweight end portions 22b of the second main ropes 22 are connected to the second rope connection portion 25b of the balance main body 25 for the counterweight 31 by means of an absorption spring 34.
- a pair of counterweight guide rails 32 for guiding ascent and descent of the counterweight 31 are installed inside the hoistway 1.
- the counterweight 31 is disposed behind the car 10.
- a first deflection sheave 35 for leading the first main ropes 21 to the counterweight 31 and a second deflection sheave 36 for leading the second main ropes 22 to the counterweight 31 are disposed in a machine room 2 (See Figure 1 ). The rest of the construction is similar to that of Embodiment 1.
- a single counterweight 31 can be used and thus a single set of counterweight guide rails 32 is sufficient, enabling simplification of the overall construction. Furthermore, because the counterweight 31 is suspended by means of a balance mechanism 23, tilting can be prevented from arising in the counterweight 31 due to differences between the first and second driving machines 3 and 4, enabling the counterweight 31 to be raised and lowered smoothly.
- the balance mechanism 23 for the counterweight 31 may also be mounted to a lower portion of the counterweight 31.
- FIG. 6 is a front elevation showing part of an elevator apparatus according to Embodiment 4 of the present invention
- Figure 7 is a cross section taken along line VII - VII in Figure 6 .
- a pivoting shaft 24 is pivoted together with a balance main body 25.
- a pivoting sensor 41 for detecting pivoting of the balance main body 25 by detecting rotation of the pivoting shaft 24 is engaged with the pivoting shaft 24.
- First and second dampers 42 and 43 are disposed between the car 10 and the balance main body 25.
- FIG 8 is a block diagram showing a control system of the elevator apparatus in Figure 6 .
- a drive control portion 45 connected to the first and second driving machines 3 and 4, an angle of inclination detecting portion 46 connected to the pivoting sensor 41, an inclination determining portion 47 connected to the drive control portion 45 and the angle of inclination detecting portion 46, and an inclination correcting portion 48 connected to the drive control portion 45 and the inclination determining portion 47 are disposed in the control apparatus 44.
- the drive control portion 45 controls activation of the first and second driving machines 3 and 4 separately.
- the angle of inclination detecting portion 46 detects the angle of inclination of the balance main body 25 by a signal from the pivoting sensor 41.
- the inclination determining portion 47 determines whether or not the angle of inclination of the balance main body 25 is less than or equal to a preset set value, and also calculates the speed of change in the angle of inclination of the balance main body 25 and determines whether or not the speed of change is less than or equal to a preset set value.
- the inclination correcting portion 48 calculates a signal to cancel out the inclination of the balance main body 25 and outputs it to the drive control portion 45.
- FIG. 9 is a flowchart showing the operation of the control apparatus 44 in Figure 8 .
- the inclination determining portion 47 determines whether or not the angle of inclination of the balance main body 25 is less than or equal to the set value (Step S1). If the angle of inclination is less than or equal to the set value (i.e., horizontal or generally horizontal), a movement permission command is output from the inclination determining portion 47 to the drive control portion 45 (Step S2), and the first and second driving machines 3 and 4 are activated.
- a signal for canceling out the inclination of the balance main body 25 is calculated by the inclination correcting portion 48 and output to the drive control portion 45.
- the inclination correcting portion 48 determines whether or not the angle of inclination is less than or equal to the set value, and if it is less than or equal to the set value, a movement permission command is output (Step S2).
- Step S5 If the angle of inclination still exceeds the set value despite inclination removal control having been carried out, it is deemed that there is some abnormality in the control system or the drive system, activation of the first and second driving machines 3 and 4 is terminated, and an abnormality detection signal is output to an elevator control room, etc. (Step S5).
- the inclination determining portion 47 calculates the speed of change in the angle of inclination of the balance main body 25 and determines whether or not the speed of change is less than or equal to a set value (Step S6). If the speed of change in the angle of inclination has exceeded the set value, that is, if the balance main body 25 has inclined suddenly, it is deemed that removal of the inclination is difficult, and the car 10 is decelerated and stopped or is stopped at a nearby floor (Step S7). Then, an abnormality detection signal is output to the elevator control room, etc.
- Step S8 a determination is made as to whether or not the magnitude of the angle of inclination is less than or equal to the set value.
- the set value constituting the criterion at this time may be the same as the set value when the car 10 is at rest or it may be different.
- Step S9 determination of the speed of change and magnitude of the angle of inclination being performed continuously or periodically while the car 10 is moving.
- a signal for canceling out the inclination of the balance main body 25 is calculated by the inclination correcting portion 48 and output to the drive control portion 45.
- the first and second driving machines 3 and 4 are activated so as to cancel out the inclination of the balance main body 25 (Step S10).
- first and second dampers 42 and 43 are disposed between the car 10 and the balance main body 25, unstable operation of the balance main body 25 can be prevented, enabling output from the pivoting sensor 41 to be stabilized.
- the balance main body 25 can be maintained in a neutral state (i.e., horizontal) at the commencement of hoisting, enabling the operating performance of the car 10 to be further improved.
- the balance main body 25 can also be maintained in a neutral state while the car 10 is moving, enabling the operating performance of the car 10 to be further improved.
- Figure 10 is a front elevation showing part of an elevator apparatus according to Embodiment 5 of the present invention.
- two pivoting sensors 49a and 49b for detecting pivoting of a balance main body 25 by detecting distances between a car 10 and a balance main body 25 are disposed between the car 10 and the balance main body 25.
- the pivoting sensors 49a and 49b are disposed equidistantly from a pivoting shaft 24.
- the rest of the construction is similar to that of Embodiment 4.
- the angle of inclination of the balance main body 25 can also be easily monitored for the presence of abnormalities using pivoting sensors 49a and 49b of a type that detects the distance between the car 10 and the balance main body 25, enabling reliability to be improved.
- determination of the angle of inclination of the balance main body 25 is made immediately before the car 10 starts moving, but a determination may also be made immediately after arrival at a floor, and determinations may also be made continuously while at rest.
- a determination of the speed of change in the angle of inclination of the balance main body 25 is made from information from the pivoting sensor 41, but the car 10 may also be decelerated and stopped or stopped at a nearby floor if a preset limiting value for the pivoting angle is reached.
- a limit switch activated when the balance main body 25 has inclined to a limiting value may also be disposed separately from the pivoting sensor.
- Embodiment 5 a determination is made from the angle of inclination of the balance main body 25 found from distances between the car 10 and the balance main body 25, but a determination may also be made directly from the distances without finding the angle of inclination.
- first and second driving machines 3 and 4 are installed in a machine room 2, but the present invention can also be applied to machine-roomless elevators in which the first and second driving machines are disposed inside a hoistway.
- the first and second driving machines may be supported by a supporting beam secured to an upper portion inside the hoistway, or a supporting beam secured to upper portions of guide rails.
Description
- The present invention relates to an elevator apparatus in which a single car is raised and lowered by a driving force from first and second driving machines.
-
Figure 11 is a structural diagram showing a conventional elevator apparatus such as that shown inEP 1 006 071 A1machine room 2 is disposed in an upper portion of ahoistway 1. First andsecond driving machines machine room 2. Thefirst driving machine 3 has: a first driving machinemain body 3A including a motor and a brake; and afirst drive sheave 5 rotated by the first driving machinemain body 3A. Thesecond driving machine 4 has: a second driving machinemain body 4A including a motor and a brake; and asecond drive sheave 6 rotated by the second driving machinemain body 4A. - A plurality of main ropes 7 (only one is shown in the figure) are wound around the
first drive sheave 5 and thesecond drive sheave 6. Themain ropes 7 have first end portions 7a andsecond end portions 7b. Afirst counterweight 8 is suspended by the first end portions 7a. Asecond counterweight 9 is suspended by thesecond end portions 7b. The first andsecond end portions 7a and 7b are connected to the first andsecond counterweights rope terminal springs - A
car 10 is suspended by intermediate portions of themain ropes 7. A suspension sheave beam 11 is secured horizontally to a lower portion of thecar 10.Suspension sheaves main ropes 7 are wound are mounted to the suspension sheave beam 11. Themain ropes 7 are secured to a central portion of the suspension sheave beam 11 by means of arope securing portion 14. - In an elevator apparatus of this kind, the
car 10 and thecounterweights hoistway 1 by the first andsecond drive sheaves main ropes 7 are secured to the suspension sheave beam 11 by means of therope securing portion 14, there is no movement of themain ropes 7 relative to thecar 10. - Consequently, in a conventional elevator apparatus, since the
main ropes 7 are secured to the suspension sheave beam 11, if differences arise in the rotational speed or the sheave diameter of the first andsecond drive sheaves second driving machines car 10, reducing operating performance. - The
main ropes 7 may also be connected to the suspension sheave beam 11 so as to allow for some displacement, but in that case, the movement of themain ropes 7 relative to thecar 10 is slight, and there is still a risk that tilting may occur in thecar 10. - Document
JP 2001/261257 A - The present invention aims to solve the above problems and an object of the present invention is to provide an elevator apparatus enabling reductions in operating performance to be prevented by preventing tilting from arising in a car due to differences between first and second driving machines.
- In order to achieve the above object, according to one aspect of the present invention, there is provided an elevator apparatus according to
claim 1. -
-
Figure 1 is a developed structural diagram showing an elevator apparatus according toEmbodiment 1 of the present invention; -
Figure 2 is a plan showing the elevator apparatus inFigure 1 ; -
Figure 3 is a developed structural diagram showing an elevator apparatus according toEmbodiment 2 of the present invention; -
Figure 4 is a plan showing an elevator apparatus according toEmbodiment 3 of the present invention; -
Figure 5 is a cross section taken along line V - V inFigure 4 ; -
Figure 6 is a front elevation showing part of an elevator apparatus according toEmbodiment 4 of the present invention; -
Figure 7 is a cross section taken along line VII - VII inFigure 6 ; -
Figure 8 is a block diagram showing a control system of the elevator apparatus inFigure 6 ; -
Figure 9 is a flowchart showing operation of a control apparatus inFigure 8 ; -
Figure 10 is a front elevation showing part of an elevator apparatus according toEmbodiment 5 of the present invention; and -
Figure 11 is a structural diagram showing an example of a conventional elevator apparatus. - Preferred embodiments of the present invention will now be explained with reference to the drawings.
-
-
Figure 1 is a developed structural diagram showing an elevator apparatus according toEmbodiment 1 of the present invention, andFigure 2 is a plan showing the elevator apparatus inFigure 1 . Moreover, inFigure 2 , a horizontal layout of major equipment is shown with a floor of a machine room omitted. - In the figures, a
machine room 2 is disposed in an upper portion of ahoistway 1. First andsecond driving machines machine room 2. Thefirst driving machine 3 has: a first driving machinemain body 3A including a motor and a brake; and afirst drive sheave 5 rotated by the first driving machinemain body 3A. Thesecond driving machine 4 has: a second driving machinemain body 4A including a motor and a brake; and asecond drive sheave 6 rotated by the second driving machinemain body 4A. - The first and
second driving machines main body 3A and the second driving machinemain body 4A face each other, that is, such that the first andsecond drive sheaves second drive sheaves Figure 2 ). Moreover, the orientation of thedriving machines Figure 1 is different from that inFigure 2 becauseFigure 1 is a developed view. - A
main rope body 20 which is a composite body of main ropes is wound around thefirst drive sheave 5 and thesecond drive sheave 6. Themain rope body 20 has: a plurality of firstmain ropes 21 wound around thefirst drive sheave 5; and a plurality of secondmain ropes 22 wound around thesecond drive sheave 6. - Each of the first
main ropes 21 has: a first car end portion 21a; and a first counterweight end portion 21b. Each of the secondmain ropes 22 has: a secondcar end portion 22a; and a secondcounterweight end portion 22b. Afirst counterweight 8 is suspended by the first counterweight end portions 21b. Asecond counterweight 9 is suspended by the secondcounterweight end portions 22b. The first and secondcounterweight end portions 21b and 22b are connected to the first andsecond counterweights rope terminal springs - A
car 10 is suspended by the first and secondcar end portions 21a and 22a. Abalance mechanism 23 is mounted to a lower portion of thecar 10. Thebalance mechanism 23 has: apivoting shaft 24 extending horizontally in a depth direction of the car 10 (top-to-bottom inFigure 2 ); and a balancemain body 25 that is pivotable around thepivoting shaft 24. - The balance
main body 25 has: a firstrope connection portion 25a positioned at one longitudinal end portion; and a secondrope connection portion 25b positioned on an opposite side of thepivoting shaft 24 from the firstrope connection portion 25a, that is, at another longitudinal end portion. The first car end portions 21a are connected to the firstrope connection portion 25a. The secondcar end portions 22a are connected to the secondrope connection portion 25b. - Absorption springs 26 and 27 for absorbing changes in connection angle between the first and second
rope connection portions car end portions 21a and 22a due to inclination of the balancemain body 25 are disposed between the firstrope connection portion 25a and the first car end portions 21a and between the secondrope connection portion 25b and the secondcar end portions 22a, respectively. - A pair of
car guide rails 28 for guiding ascent and descent of thecar 10, a pair of firstcounterweight guide rails 29 for guiding ascent and descent of thefirst counterweight 8, and a pair of secondcounterweight guide rails 30 for guiding ascent and descent of thesecond counterweight 9 are installed inside thehoistway 1. The first andsecond counterweights car 10 on left and right sides of thecar 10 . - In an elevator apparatus of this kind, because the
car 10 is suspended by means of thebalance mechanism 23, tilting is prevented from arising in thecar 10 due to differences between the first andsecond driving machines car 10 is not tilted, and the differences can be absorbed by the balancemain body 25 inclining independently. - Furthermore, by using two
driving machines driving machines - In addition, because absorption springs 26 and 27 are disposed between the first and second
rope connection portions car end portions 21a and 22a, respectively, changes in connection angle between the first and secondrope connection portions car end portions 21a and 22a due to inclination of the balancemain body 25 are absorbed, and rods of the first and secondcar end portions 21a and 22a, the balancemain body 2, etc., are not subjected to unbearable force, enabling the generation of stress to be suppressed. - Next,
Figure 3 is a developed structural diagram showing an elevator apparatus according toEmbodiment 2 of the present invention. In this example, abalance mechanism 23 similar to that ofEmbodiment 1 is mounted to an upper portion of acar 10. The rest of the construction is similar to that ofEmbodiment 1. - When a
balance mechanism 23 is mounted to an upper portion of thecar 10 in this manner, tilting is also prevented from arising in thecar 10 due to differences between the first andsecond driving machines -
Figure 4 is a plan showing an elevator apparatus according toEmbodiment 3 of the present invention, andFigure 5 is a cross section taken along line V - V inFigure 4 . Moreover, inFigure 4 , a horizontal layout of major equipment is shown with a floor of a machine room omitted. - In the figures, first and
second driving machines hoistway 1. - A
car 10 is suspended on first and secondcar end portions 21a and 22a of first and secondmain ropes balance mechanism 23, in a similar manner toEmbodiment 1. Acounterweight 31 is suspended on first and secondcounterweight end portions 21b and 22b of the first and secondmain ropes balance mechanism 23 that is similar to that for thecar 10. - In
Embodiment 1, twocounterweights Embodiment 2, only onecounterweight 31 is used. Thebalance mechanism 23 for thecounterweight 31 may be somewhat different from thebalance mechanism 23 for thecar 10 in size, etc., but because it is similar in function, it has been allocated an identical numeral in the figures for simplicity. - The
balance mechanism 23 for thecounterweight 31 is mounted to an upper portion of thecounterweight 31. The first counterweight end portions 21b of the firstmain ropes 21 are connected to the firstrope connection portion 25a of the balancemain body 25 for thecounterweight 31 by means of anabsorption spring 33. The secondcounterweight end portions 22b of the secondmain ropes 22 are connected to the secondrope connection portion 25b of the balancemain body 25 for thecounterweight 31 by means of anabsorption spring 34. - A pair of
counterweight guide rails 32 for guiding ascent and descent of thecounterweight 31 are installed inside thehoistway 1. Thecounterweight 31 is disposed behind thecar 10. Afirst deflection sheave 35 for leading the firstmain ropes 21 to thecounterweight 31 and asecond deflection sheave 36 for leading the secondmain ropes 22 to thecounterweight 31 are disposed in a machine room 2 (SeeFigure 1 ). The rest of the construction is similar to that ofEmbodiment 1. - According to an elevator apparatus of this kind, a
single counterweight 31 can be used and thus a single set ofcounterweight guide rails 32 is sufficient, enabling simplification of the overall construction. Furthermore, because thecounterweight 31 is suspended by means of abalance mechanism 23, tilting can be prevented from arising in thecounterweight 31 due to differences between the first andsecond driving machines counterweight 31 to be raised and lowered smoothly. - Moreover, the
balance mechanism 23 for thecounterweight 31 may also be mounted to a lower portion of thecounterweight 31. -
Figure 6 is a front elevation showing part of an elevator apparatus according toEmbodiment 4 of the present invention, andFigure 7 is a cross section taken along line VII - VII inFigure 6 . In the figures, a pivotingshaft 24 is pivoted together with a balancemain body 25. A pivotingsensor 41 for detecting pivoting of the balancemain body 25 by detecting rotation of the pivotingshaft 24 is engaged with the pivotingshaft 24. First andsecond dampers car 10 and the balancemain body 25. -
Figure 8 is a block diagram showing a control system of the elevator apparatus inFigure 6 . Adrive control portion 45 connected to the first andsecond driving machines inclination detecting portion 46 connected to the pivotingsensor 41, aninclination determining portion 47 connected to thedrive control portion 45 and the angle ofinclination detecting portion 46, and aninclination correcting portion 48 connected to thedrive control portion 45 and theinclination determining portion 47 are disposed in thecontrol apparatus 44. - The
drive control portion 45 controls activation of the first andsecond driving machines inclination detecting portion 46 detects the angle of inclination of the balancemain body 25 by a signal from the pivotingsensor 41. Theinclination determining portion 47 determines whether or not the angle of inclination of the balancemain body 25 is less than or equal to a preset set value, and also calculates the speed of change in the angle of inclination of the balancemain body 25 and determines whether or not the speed of change is less than or equal to a preset set value. Theinclination correcting portion 48 calculates a signal to cancel out the inclination of the balancemain body 25 and outputs it to thedrive control portion 45. - The rest of the construction is similar to that of
Embodiment 1. - Next, operation will be explained. Action of the
balance mechanism 23 is similar to that ofEmbodiment 1.Figure 9 is a flowchart showing the operation of thecontrol apparatus 44 inFigure 8 . When a call is registered with thecar 10 stopped at a landing floor and a movement command is input into thecontrol apparatus 44, theinclination determining portion 47 determines whether or not the angle of inclination of the balancemain body 25 is less than or equal to the set value (Step S1). If the angle of inclination is less than or equal to the set value (i.e., horizontal or generally horizontal), a movement permission command is output from theinclination determining portion 47 to the drive control portion 45 (Step S2), and the first andsecond driving machines - If the angle of inclination has exceeded the set value, a signal for canceling out the inclination of the balance
main body 25 is calculated by theinclination correcting portion 48 and output to thedrive control portion 45. Thus, at least one of the first andsecond driving machines inclination determining portion 47 determines whether or not the angle of inclination is less than or equal to the set value, and if it is less than or equal to the set value, a movement permission command is output (Step S2). - If the angle of inclination still exceeds the set value despite inclination removal control having been carried out, it is deemed that there is some abnormality in the control system or the drive system, activation of the first and
second driving machines - When a movement permission command is output and the
car 10 is actually moving, theinclination determining portion 47 calculates the speed of change in the angle of inclination of the balancemain body 25 and determines whether or not the speed of change is less than or equal to a set value (Step S6). If the speed of change in the angle of inclination has exceeded the set value, that is, if the balancemain body 25 has inclined suddenly, it is deemed that removal of the inclination is difficult, and thecar 10 is decelerated and stopped or is stopped at a nearby floor (Step S7). Then, an abnormality detection signal is output to the elevator control room, etc. - If there is no abnormality in the speed of change in the angle of inclination, a determination is made as to whether or not the magnitude of the angle of inclination is less than or equal to the set value (Step S8). The set value constituting the criterion at this time may be the same as the set value when the
car 10 is at rest or it may be different. After determining the angle of inclination, a check is made as to whether or not thecar 10 has finished moving (Step S9), determination of the speed of change and magnitude of the angle of inclination being performed continuously or periodically while thecar 10 is moving. - If the magnitude of the angle of inclination exceeds the set value while the
car 10 is moving, a signal for canceling out the inclination of the balancemain body 25 is calculated by theinclination correcting portion 48 and output to thedrive control portion 45. Thus, the first andsecond driving machines - In an elevator apparatus of this kind, because a pivoting
sensor 41 for detecting pivoting of the balancemain body 25 is used, the angle of inclination of the balancemain body 25 can be easily monitored for the presence of abnormalities, enabling reliability to be improved. - Because first and
second dampers car 10 and the balancemain body 25, unstable operation of the balancemain body 25 can be prevented, enabling output from the pivotingsensor 41 to be stabilized. - In addition, because at least one of the first and
second driving machines main body 25 in response to information from the pivotingsensor 41 when thecar 10 at rest, the balancemain body 25 can be maintained in a neutral state (i.e., horizontal) at the commencement of hoisting, enabling the operating performance of thecar 10 to be further improved. - Furthermore, because the first and
second driving machines main body 25 in response to information from the pivotingsensor 41 while thecar 10 is moving, the balancemain body 25 can also be maintained in a neutral state while thecar 10 is moving, enabling the operating performance of thecar 10 to be further improved. - Because the speed of change in the angle of inclination of the
balancemain body 25 is detected from information from the pivotingsensor 41 while thecar 10 is moving, and a determination is made as to whether or not the speed of change is less than or equal to a set value, abnormalities in the drive system and the control system can be detected earlier. - In addition, because the
car 10 is decelerated and stopped or is stopped at a nearby floor and an abnormality detection signal is output when the speed of change in the angle of inclination of the balancemain body 25 has exceeded a set value, action can be taken immediately if abnormalities occur. - Next,
Figure 10 is a front elevation showing part of an elevator apparatus according toEmbodiment 5 of the present invention. In the figure, two pivotingsensors 49a and 49b for detecting pivoting of a balancemain body 25 by detecting distances between acar 10 and a balancemain body 25 are disposed between thecar 10 and the balancemain body 25. The pivotingsensors 49a and 49b are disposed equidistantly from a pivotingshaft 24. The rest of the construction is similar to that ofEmbodiment 4. - Thus, the angle of inclination of the balance
main body 25 can also be easily monitored for the presence of abnormalities usingpivoting sensors 49a and 49b of a type that detects the distance between thecar 10 and the balancemain body 25, enabling reliability to be improved. - Moreover, in
Embodiment 4, determination of the angle of inclination of the balancemain body 25 is made immediately before thecar 10 starts moving, but a determination may also be made immediately after arrival at a floor, and determinations may also be made continuously while at rest. - In
Embodiment 4, a determination of the speed of change in the angle of inclination of the balancemain body 25 is made from information from the pivotingsensor 41, but thecar 10 may also be decelerated and stopped or stopped at a nearby floor if a preset limiting value for the pivoting angle is reached. In addition, a limit switch activated when the balancemain body 25 has inclined to a limiting value may also be disposed separately from the pivoting sensor. - In addition, in
Embodiment 5, a determination is made from the angle of inclination of the balancemain body 25 found from distances between thecar 10 and the balancemain body 25, but a determination may also be made directly from the distances without finding the angle of inclination. - Furthermore, in
Embodiments 1 to 5, elevator apparatuses are shown in which first andsecond driving machines machine room 2, but the present invention can also be applied to machine-roomless elevators in which the first and second driving machines are disposed inside a hoistway. In machine-roomless elevators, the first and second driving machines may be supported by a supporting beam secured to an upper portion inside the hoistway, or a supporting beam secured to upper portions of guide rails.
Claims (9)
- An elevator apparatus comprising:a first driving machine (3) having a first drive sheave (5) ;a second driving machine (4) having a second drive sheave (6);a main rope body (20) wound around the first and second drive sheaves (5, 6); anda car (10) and a counterweight (8, 9, 31)suspended inside a hoistway (1) by the main rope body (20) so as to be raised and lowered inside the hoistway (1) by a driving force from the first and second driving machines (3, 4),characterized in that:a balance mechanism (23) having a pivoting shaft (24) extending horizontally and a balance main body (25) that is pivotable around the pivoting shaft (24) is mounted to the car (10);the balance main body (25) has a first rope connection portion (25a), and a second rope connection portion (25b) positioned on an opposite side of the pivoting shaft (24) from the first rope connection portion (25a);the main rope body (20) has a first main rope (21) wound around the first drive sheave (5), and a second main rope (22) wound around the second drive sheave (6);the first main rope (21) has a first car end portion (21a) connected to the first rope connection portion (25a), and a first counterweight end portion (21b) connected to the counterweight (8, 31); andthe second main rope (22) has a second car end portion (22a) connected to the second rope connection portion (25b), and a second counterweight end portion (22b) connected to the counterweight (9, 31), and further characterized in that absorption springs (26, 27) for absorbing changes in connection angle between the first and second rope connection portions (25a, 25b) and the first and second car end portions (21a, 22a) due to inclination of the balance main body (25) are disposed between the first and second rope connection portions (25a, 25b) and the first and second car end portions (21a, 22a), respectively.
- The elevator apparatus according to Claim 1, wherein:the balance mechanism (23) is also mounted to the counterweight (31);the first counterweight end portion (21b) is connected to the first rope connection portion (25a) of the balance main body (25) for the counterweight (31); andthe second counterweight end portion (22b) is connected to the second rope connection portion (25b) of the balance main body (25) for the counterweight (31).
- The elevator apparatus according to Claim 2, wherein:absorption springs (33, 34) for absorbing changes in connection angle between the first and second rope connection portions (25a, 25b) and the first and second counterweight end portions (21b, 22b) due to inclination of the balance main body (25) are disposed between the first and second rope connection portions (25a, 25b) and the first and second counterweight end portions (21b, 22b), respectively.
- The elevator apparatus according to Claim 1 or Claim 2, further comprising:a pivoting sensor (41) for detecting pivoting of the balance main body (25).
- The elevator apparatus according to Claim 4, wherein:a damper (42, 43) is disposed between the balance main body (25) and the car (10).
- The elevator apparatus according to Claim 4, further comprising:a control apparatus (44) for controlling at least one of the first and second driving machines (3, 4) so as to cancel out the inclination of the balance main body (25) in response to information from the pivoting sensor (41) when the car (10) is at rest.
- The elevator apparatus according to Claim 4, further comprising:a control apparatus (44) for controlling the first and second driving machines (3, 4) so as to cancel out the inclination of the balance main body (25) in response to information from the pivoting sensor (41) when the car (10) is moving.
- The elevator apparatus according to Claim 4, further comprising:a control apparatus (44) for detecting a speed of change in an angle of inclination of the balance main body (25) from information from the pivoting sensor (41) and determining whether or not the speed of change is less than or equal to a preset set value when the car (10) is moving.
- The elevator apparatus according to Claim 8, wherein:the control apparatus (44) stops the car (10) at a nearby floor and outputs an abnormality detection signal when the speed of change in the angle of inclination of the balance main body (25) exceeds the set value.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/009624 WO2004026749A1 (en) | 2002-09-19 | 2002-09-19 | Elevator equipment |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1591399A1 EP1591399A1 (en) | 2005-11-02 |
EP1591399A4 EP1591399A4 (en) | 2009-02-25 |
EP1591399B1 true EP1591399B1 (en) | 2010-07-21 |
Family
ID=32012226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02807743A Expired - Fee Related EP1591399B1 (en) | 2002-09-19 | 2002-09-19 | Elevator equipment |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1591399B1 (en) |
JP (1) | JP4289623B2 (en) |
CN (1) | CN1308215C (en) |
WO (1) | WO2004026749A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4936671B2 (en) * | 2005-01-14 | 2012-05-23 | 三菱電機株式会社 | Elevator control device |
WO2006093020A1 (en) * | 2005-03-01 | 2006-09-08 | Mitsubishi Denki Kabushiki Kaisha | Elevator device |
EP1700811B1 (en) * | 2005-03-12 | 2013-01-09 | ThyssenKrupp Elevator AG | Elevator |
KR100922036B1 (en) * | 2005-08-25 | 2009-10-19 | 미쓰비시덴키 가부시키가이샤 | Elevator device |
CN101044081B (en) * | 2005-08-25 | 2011-01-05 | 三菱电机株式会社 | Elevator apparatus |
US9767969B2 (en) | 2010-09-24 | 2017-09-19 | Siemens Aktiengesellschaft | Subsea power switching device and methods of operating the same |
US8925689B2 (en) | 2011-01-19 | 2015-01-06 | Smart Lifts, Llc | System having a plurality of elevator cabs and counterweights that move independently in different sections of a hoistway |
US8430210B2 (en) * | 2011-01-19 | 2013-04-30 | Smart Lifts, Llc | System having multiple cabs in an elevator shaft |
CN102229397A (en) * | 2011-06-09 | 2011-11-02 | 上海微频莱机电科技有限公司 | Lifting device of tower cylinder lifter |
CN103552894B (en) * | 2013-11-14 | 2016-08-17 | 日立电梯(中国)有限公司 | Weighing structure at the bottom of sedan-chair and comprise the elevator of weighing structure at the bottom of this sedan-chair |
CN104444183A (en) * | 2014-11-05 | 2015-03-25 | 罗三定 | Conveying and lifting all-in-one machine |
EP3240752A1 (en) * | 2014-12-31 | 2017-11-08 | Otis Elevator Company | Elevator system roping arrangement |
CN106006319A (en) * | 2016-07-29 | 2016-10-12 | 上海汉神机电股份有限公司 | Angle-variable inclination mechanism |
CN109969912A (en) * | 2017-12-27 | 2019-07-05 | 日立电梯(中国)有限公司 | A kind of elevator of double counterweight hangings |
CN110395644B (en) * | 2018-04-25 | 2020-12-01 | 三菱电机株式会社 | Elevator car and elevator device |
EP3705443A1 (en) * | 2019-03-05 | 2020-09-09 | Inventio AG | Lift system with balanced traction means |
EP4077192A1 (en) * | 2019-12-20 | 2022-10-26 | Inventio Ag | Elevator system comprising a plurality of differing support means |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE812956C (en) * | 1950-03-14 | 1951-09-06 | Demag Ag | Deep shaft conveyance |
JPS60213676A (en) * | 1984-04-05 | 1985-10-25 | 東芝昇降機サ−ビス株式会社 | Balancer for working base of elevator |
JP3165974B2 (en) * | 1992-01-22 | 2001-05-14 | 日成ビルド工業株式会社 | Counterweight device for elevator-type multilevel parking system |
JPH0725553A (en) * | 1993-07-09 | 1995-01-27 | Mitsubishi Electric Corp | Elevator control system |
EP1006071A1 (en) * | 1998-12-02 | 2000-06-07 | Inventio Ag | Elevator with two drives |
JP2001261257A (en) * | 2000-03-23 | 2001-09-26 | Mitsubishi Electric Corp | Elevator apparatus |
JP2002167137A (en) * | 2000-11-29 | 2002-06-11 | Toshiba Corp | Elevator |
JP2002179358A (en) * | 2000-12-19 | 2002-06-26 | Fujitec Co Ltd | Elevator device |
-
2002
- 2002-09-19 CN CNB028228030A patent/CN1308215C/en not_active Expired - Fee Related
- 2002-09-19 JP JP2004537516A patent/JP4289623B2/en not_active Expired - Fee Related
- 2002-09-19 WO PCT/JP2002/009624 patent/WO2004026749A1/en active Application Filing
- 2002-09-19 EP EP02807743A patent/EP1591399B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPWO2004026749A1 (en) | 2006-01-12 |
EP1591399A1 (en) | 2005-11-02 |
WO2004026749A1 (en) | 2004-04-01 |
JP4289623B2 (en) | 2009-07-01 |
CN1589228A (en) | 2005-03-02 |
EP1591399A4 (en) | 2009-02-25 |
CN1308215C (en) | 2007-04-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1591399B1 (en) | Elevator equipment | |
US6062344A (en) | Elevator system | |
JP4368854B2 (en) | Elevator equipment | |
JP4656681B2 (en) | Double decker or multi decker elevator | |
JP5610974B2 (en) | Elevator equipment | |
JP5031577B2 (en) | Elevator system with multiple cars in hoistway | |
JP4913036B2 (en) | Elevator equipment | |
JP2001171924A (en) | Double-deck elevator control device | |
CN110817614A (en) | Improving the transport capacity of an elevator system | |
WO2001062654A1 (en) | Elevator device | |
JP2010184791A (en) | Elevator | |
JP2000229772A (en) | Elevator device | |
JP3991657B2 (en) | elevator | |
JP2001226050A (en) | Elevator system | |
JP5094106B2 (en) | Elevator with floor adjustment function | |
CN109455586B (en) | Multi-compartment elevator | |
JP3868789B2 (en) | Elevator equipment | |
JP2001247265A (en) | Elevator control system | |
EP1568644B1 (en) | Elevator equipment | |
EP1512652B1 (en) | Elevator | |
JP5679602B1 (en) | Elevator with floor adjustment function | |
JP6339256B1 (en) | Elevator rope run-out detection system | |
JP4618636B2 (en) | Elevator equipment | |
JP2004155526A (en) | Elevator device | |
JP2005231807A (en) | Double deck elevator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040220 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
RBV | Designated contracting states (corrected) |
Designated state(s): NL |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MITSUBISHI DENKI KABUSHIKI KAISHA |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20090128 |
|
17Q | First examination report despatched |
Effective date: 20090629 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): NL |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20110426 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20130810 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20150401 |