EP1357074B1 - Main rope elongation compensating device for elevator - Google Patents
Main rope elongation compensating device for elevator Download PDFInfo
- Publication number
- EP1357074B1 EP1357074B1 EP00974828A EP00974828A EP1357074B1 EP 1357074 B1 EP1357074 B1 EP 1357074B1 EP 00974828 A EP00974828 A EP 00974828A EP 00974828 A EP00974828 A EP 00974828A EP 1357074 B1 EP1357074 B1 EP 1357074B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheave
- main rope
- adjusting
- elevator
- deflection
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
- B66B7/10—Arrangements of ropes or cables for equalising rope or cable tension
Definitions
- the present invention relates to an elevator main rope elongation compensating apparatus disposed in an elevator using a synthetic fiber rope for a main rope, the elevator main rope elongation compensating apparatus maintaining an appropriate positional relationship between a car and a counterweight in response to changes in the length of the main rope due to seasonal fluctuations, etc.
- the present invention aims to solve the above problems and an object of the present invention is to provide an elevator main rope elongation compensating apparatus capable of coping adequately with changes in the length of a main rope composed of a synthetic fiber rope.
- an elevator main rope elongation compensating apparatus disposed in an elevator in which a main rope for suspending a car and a counterweight is composed of a synthetic fiber rope and is wound around a drive sheave of a driving machine and a deflection sheave, including a rotatable adjusting sheave displaceably disposed between the drive sheave and the deflection sheave so as to be in contact with the main rope, a length of the main rope between the drive sheave and the deflection sheave being adjusted by displacing the rotatable adjusting sheave.
- Figure 1 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according to Embodiment 1 of the present invention.
- a driving machine 1 and a deflection sheave 2 are installed in an upper portion of a hoistway.
- a main rope 3 composed of a synthetic fiber rope is wound around a drive sheave 1a of the driving machine 1 and the deflection sheave 2.
- a car 4 is suspended from a first end portion of the main rope 3.
- a counterweight 5 is suspended from a second end portion of the main rope 3.
- a rotatable adjusting sheave 6 contacting the main rope 3 is disposed between the drive sheave 1a and the deflection sheave 2.
- the adjusting sheave 6 is displaced by a driving force from a sheave driving machine 7 having a reduction gear so as to be guided by a guide apparatus 8 and slide linearly.
- a length of the main rope 3 between the drive sheave 1a and the deflection sheave 2 is changed by the displacement of the adjusting sheave 6.
- the adjusting sheave 6 is disposed on an opposite side of the main rope 3 from the drive sheave 1a and the deflection sheave 2.
- a detector apparatus 9 for detecting changes in the length of the main rope 3 is disposed in the hoistway.
- a detector apparatus detecting the position of a marking disposed on the main rope 3, or a detector apparatus detecting the position of the counterweight 5 when the car 4 is positioned at a predetermined floor, etc. is used for the detector apparatus 9.
- the position of the marking or the counterweight 5 can be detected, for example, by means of an optical switch, or a mechanical micro switch, etc.
- the sheave driving machine 7 is driven in response to a signal from the detector apparatus 9, automatically adjusting the position of the adjusting sheave 6.
- the main rope elongation compensating apparatus includes the adjusting sheave 6, the sheave driving machine 7, the guide apparatus 8, and the detector apparatus 9.
- FIG 2 is a perspective showing a construction of the main rope 3 from Figure 1 .
- an inner strand layer 24 having a plurality of inner strands 22 and filler strands 23 disposed in gaps between these inner strands 22 is disposed around a core wire 21.
- Each of the inner strands 22 is composed of a plurality of aramid fibers and an impregnating material such as a polyurethane or the like.
- the filler strands 23 are composed of a polyamide, for example.
- An outer strand layer 26 having a plurality of outer strands 25 is disposed around an outer circumference of the inner strand layer 24.
- Each of the outer strands 25 is composed of a plurality of aramid fibers and an impregnating material such as a polyurethane or the like in a similar manner to the inner strands 22.
- a friction-reducing coating layer 27 for preventing abrasion of the strands 22 and 25 due to friction among the strands 22 and 25 is disposed between the inner strand layer 24 and the outer strand layer 26.
- a protective coating layer 28 is also disposed on an outer circumferential portion of the outer strand layer 26.
- the synthetic fiber rope having the above construction has a high coefficient of friction compared to a steel rope and is superior in flexibility.
- a main rope elongation compensating apparatus of this kind when expansion of the main rope 3 is detected by the detector apparatus 9, the sheave driving machine 7 is driven automatically in response to a signal from the detector apparatus 9, sliding the adjusting sheave 6 downward in Figure 1 along the guide apparatus 8. Hence, the length of the main rope 3 between the drive sheave 1a and the deflection sheave 2 is increased as indicated by the double-dotted chain lines in Figure 1 , absorbing an amount equal to the elongation over the entire main rope 3. Then, when the positional relationship between the car 4 and the counterweight 5 returns to an appropriate state, movement of the adjusting sheave 6 is stopped automatically.
- the positional relationship between the car 4 and the counterweight 5 is maintained in an appropriate state even if expansion or contraction arises in the main rope 3 composed of the synthetic fiber rope. Furthermore, because the adjusting sheave 6 is guided by the guide apparatus 8 so as to slide linearly, the adjusting sheave 6 can be displaced stably.
- the adjusting sheave 6 is disposed on the opposite side of the main rope 3 from the drive sheave 1a and the deflection sheave 2, when elongation arises in the main rope 3, the adjusting sheave 6 is displaced in a direction that increases the contact angle of the main rope 3 on the drive sheave 1a, preventing traction between the main rope 3 and the drive sheave 1a from being reduced due to the displacement of the adjusting sheave 6.
- FIG 3 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according to Embodiment 2 of the present invention.
- the adjusting sheave 6 is mounted to a tip portion of a pivotable arm 11.
- the arm 11 is pivoted about a base end portion by a sheave driving machine 12.
- the adjusting sheave 6 is displaced by the pivoting of the arm 11.
- the rest of the construction is similar to that of Embodiment 1.
- a main rope elongation compensating apparatus of this kind when expansion of the main rope 3 is detected by the detector apparatus 9, the sheave driving machine 12 is driven automatically in response to a signal from the detector apparatus 9, displacing the adjusting sheave 6 downward in Figure 3 by pivoting the arm 11 counterclockwise in Figure 3 .
- the length of the main rope 3 between the drive sheave 1a and the deflection sheave 2 is increased as indicated by the double-dotted chain lines in Figure 3 , absorbing an amount equal to the elongation over the entire main rope 3.
- the pivoting of the arm 11 is stopped automatically.
- the positional relationship between the car 4 and the counterweight 5 is maintained in an appropriate state even if expansion or contraction arises in the main rope 3 composed of the synthetic fiber rope.
- the adjusting sheave 6 is displaced automatically but may be displaced manually, for example, using a ball screw or the like.
- the adjusting sheave 6 is disposed on the opposite side of the main rope 3 from the drive sheave 1a and the deflection sheave 2, but the adjusting sheave 6 may also be disposed on the same side of the main rope 3 as the drive sheave 1a and the deflection sheave 2.
Landscapes
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Description
- The present invention relates to an elevator main rope elongation compensating apparatus disposed in an elevator using a synthetic fiber rope for a main rope, the elevator main rope elongation compensating apparatus maintaining an appropriate positional relationship between a car and a counterweight in response to changes in the length of the main rope due to seasonal fluctuations, etc.
- Conventionally, in elevators using a steel rope for a main rope, since the amount of elongation and contraction of the main rope due to seasonal fluctuations, etc., is minute relative to the replacement cycle of the main rope, length adjustment has been performed at an end portion of the main rope when required.
- However, when using a synthetic fiber rope for the main rope, elongation due to the effects of humidity, etc., is large compared to the steel rope, requiring frequent length adjustment. Hence, it is not possible to cope adequately by adjustment at the end portion of the main rope alone.
- The present invention aims to solve the above problems and an object of the present invention is to provide an elevator main rope elongation compensating apparatus capable of coping adequately with changes in the length of a main rope composed of a synthetic fiber rope.
- According to one aspect of the present invention, there is provided an elevator main rope elongation compensating apparatus disposed in an elevator in which a main rope for suspending a car and a counterweight is composed of a synthetic fiber rope and is wound around a drive sheave of a driving machine and a deflection sheave, including a rotatable adjusting sheave displaceably disposed between the drive sheave and the deflection sheave so as to be in contact with the main rope, a length of the main rope between the drive sheave and the deflection sheave being adjusted by displacing the rotatable adjusting sheave.
-
-
Figure 1 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according to Embodiment 1 of the present invention; -
Figure 2 is a perspective showing a construction of a main rope fromFigure 1 ; -
Figure 3 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according toEmbodiment 2 of the present invention; and -
Figure 4 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according toEmbodiment 3 of the present invention. - Preferred embodiments of the present invention will now be explained with reference to the drawings.
-
Figure 1 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according to Embodiment 1 of the present invention. - In the figure, a driving machine 1 and a
deflection sheave 2 are installed in an upper portion of a hoistway. Amain rope 3 composed of a synthetic fiber rope is wound around a drive sheave 1a of the driving machine 1 and thedeflection sheave 2. Acar 4 is suspended from a first end portion of themain rope 3. Acounterweight 5 is suspended from a second end portion of themain rope 3. - A
rotatable adjusting sheave 6 contacting themain rope 3 is disposed between the drive sheave 1a and thedeflection sheave 2. The adjustingsheave 6 is displaced by a driving force from asheave driving machine 7 having a reduction gear so as to be guided by aguide apparatus 8 and slide linearly. A length of themain rope 3 between the drive sheave 1a and thedeflection sheave 2 is changed by the displacement of the adjustingsheave 6. - Furthermore, the adjusting
sheave 6 is disposed on an opposite side of themain rope 3 from the drive sheave 1a and thedeflection sheave 2. - A detector apparatus 9 for detecting changes in the length of the
main rope 3 is disposed in the hoistway. For example, a detector apparatus detecting the position of a marking disposed on themain rope 3, or a detector apparatus detecting the position of thecounterweight 5 when thecar 4 is positioned at a predetermined floor, etc., is used for the detector apparatus 9. Furthermore, the position of the marking or thecounterweight 5 can be detected, for example, by means of an optical switch, or a mechanical micro switch, etc. - In Embodiment 1, the
sheave driving machine 7 is driven in response to a signal from the detector apparatus 9, automatically adjusting the position of the adjustingsheave 6. The main rope elongation compensating apparatus includes the adjustingsheave 6, thesheave driving machine 7, theguide apparatus 8, and the detector apparatus 9. -
Figure 2 is a perspective showing a construction of themain rope 3 fromFigure 1 . In the figure, aninner strand layer 24 having a plurality ofinner strands 22 andfiller strands 23 disposed in gaps between theseinner strands 22 is disposed around acore wire 21. Each of theinner strands 22 is composed of a plurality of aramid fibers and an impregnating material such as a polyurethane or the like. Thefiller strands 23 are composed of a polyamide, for example. - An
outer strand layer 26 having a plurality ofouter strands 25 is disposed around an outer circumference of theinner strand layer 24. Each of theouter strands 25 is composed of a plurality of aramid fibers and an impregnating material such as a polyurethane or the like in a similar manner to theinner strands 22. - A friction-reducing
coating layer 27 for preventing abrasion of thestrands strands inner strand layer 24 and theouter strand layer 26. Aprotective coating layer 28 is also disposed on an outer circumferential portion of theouter strand layer 26. - The synthetic fiber rope having the above construction has a high coefficient of friction compared to a steel rope and is superior in flexibility.
- In a main rope elongation compensating apparatus of this kind, when expansion of the
main rope 3 is detected by the detector apparatus 9, thesheave driving machine 7 is driven automatically in response to a signal from the detector apparatus 9, sliding the adjustingsheave 6 downward inFigure 1 along theguide apparatus 8. Hence, the length of themain rope 3 between the drive sheave 1a and thedeflection sheave 2 is increased as indicated by the double-dotted chain lines inFigure 1 , absorbing an amount equal to the elongation over the entiremain rope 3. Then, when the positional relationship between thecar 4 and thecounterweight 5 returns to an appropriate state, movement of the adjustingsheave 6 is stopped automatically. - On the other hand, when contraction of the
main rope 3 is detected, the length of themain rope 3 between the drive sheave 1a and thedeflection sheave 2 is shortened by displacing the adjustingsheave 6 upward inFigure 1 , letting out an amount equal to the contraction over the entiremain rope 3. - Consequently, according to the above main rope elongation compensating apparatus, the positional relationship between the
car 4 and thecounterweight 5 is maintained in an appropriate state even if expansion or contraction arises in themain rope 3 composed of the synthetic fiber rope. Furthermore, because the adjustingsheave 6 is guided by theguide apparatus 8 so as to slide linearly, the adjustingsheave 6 can be displaced stably. - In addition, since the adjusting
sheave 6 is displaced automatically by thesheave driving machine 7 when expansion or contraction of themain rope 3 is detected by the detector apparatus 9, time spent adjusting the length of themain rope 3 can be reduced significantly. - Furthermore, since the adjusting
sheave 6 is disposed on the opposite side of themain rope 3 from the drive sheave 1a and thedeflection sheave 2, when elongation arises in themain rope 3, the adjustingsheave 6 is displaced in a direction that increases the contact angle of themain rope 3 on the drive sheave 1a, preventing traction between themain rope 3 and the drive sheave 1a from being reduced due to the displacement of the adjustingsheave 6. -
Figure 3 is a structural diagram showing an elevator having a main rope elongation compensating apparatus according toEmbodiment 2 of the present invention. In the figure, the adjustingsheave 6 is mounted to a tip portion of a pivotable arm 11. The arm 11 is pivoted about a base end portion by asheave driving machine 12. The adjustingsheave 6 is displaced by the pivoting of the arm 11. The rest of the construction is similar to that of Embodiment 1. - In a main rope elongation compensating apparatus of this kind, when expansion of the
main rope 3 is detected by the detector apparatus 9, thesheave driving machine 12 is driven automatically in response to a signal from the detector apparatus 9, displacing the adjustingsheave 6 downward inFigure 3 by pivoting the arm 11 counterclockwise inFigure 3 . Hence, the length of themain rope 3 between the drive sheave 1a and thedeflection sheave 2 is increased as indicated by the double-dotted chain lines inFigure 3 , absorbing an amount equal to the elongation over the entiremain rope 3. Then, when the positional relationship between thecar 4 and thecounterweight 5 returns to an appropriate state, the pivoting of the arm 11 is stopped automatically. - On the other hand, when contraction of the
main rope 3 is detected, the length of themain rope 3 between the drive sheave 1a and thedeflection sheave 2 is shortened by displacing the adjustingsheave 6 upward inFigure 3 by pivoting the arm 11 clockwise inFigure 3 , thereby letting out an amount equal to the contraction over the entiremain rope 3. - Consequently, according to the above main rope elongation compensating apparatus, the positional relationship between the
car 4 and thecounterweight 5 is maintained in an appropriate state even if expansion or contraction arises in themain rope 3 composed of the synthetic fiber rope. - Moreover, in
Embodiments 1 and 2, the adjustingsheave 6 is displaced automatically but may be displaced manually, for example, using a ball screw or the like. - Furthermore, in addition to expansion and contraction of the
main rope 3 due to seasonal fluctuations, when further elongation of themain rope 3, due to age-related elongation of themain rope 3, etc., is detected despite the adjustingsheave 6 being displaced to a maximum, a control room, etc., may also be alerted and a maintenance inspection operation performed by maintenance personnel. - In addition, in
Embodiments 1 and 2, the adjustingsheave 6 is disposed on the opposite side of themain rope 3 from the drive sheave 1a and thedeflection sheave 2, but the adjustingsheave 6 may also be disposed on the same side of themain rope 3 as the drive sheave 1a and thedeflection sheave 2. - Now, if the traction between the drive sheave 1a and the
main rope 3 is too large, there is a possibility that, due to a malfunction, themain rope 3 might not slip on the drive sheave 1a and thecar 4 may be hoisted even after thecounterweight 5 has collided with a buffer (not shown) on a hoistway bottom portion. - In order to prevent situations of this kind, it is necessary to suppress the traction between the drive sheave 1a and the
main rope 3 to equal to or less than a tolerance value. For that reason, it is undesirable for the contact angle of themain rope 3 on the drive sheave 1a to be increased by displacement of the adjustingsheave 6 if the traction is already close to the tolerance value when the adjustingsheave 6 is at an initial position. - Consequently, in such cases, it is suitable to dispose the adjusting
sheave 6 on the same side of themain rope 3 as the drive sheave 1a and thedeflection sheave 2, as shown inFigure 4 , for example. According to this construction, since the traction is decreased when the adjustingsheave 6 is displaced upward in the figure, it will not exceed the tolerance value. - In this case, it goes without saying that a minimum required traction is ensured even when the adjusting
sheave 6 is displaced to a maximum.
Claims (6)
- An elevator main rope elongation compensating apparatus disposed in an elevator in which a main rope (3) for suspending a car (4) and a counterweight (5) is composed of a synthetic fiber rope and is wound around a drive sheave (1a) of a driving machine (1) and a deflection sheave (2),
characterized by comprising a rotatable adjusting sheave (6) displaceably disposed between said drive sheave (1a) and said deflection sheave (2) so as to be in contact with said main rope (3), a length of said main rope (3) between said drive sheave (1a) and said deflection sheave (2) being adjusted by displacing said rotatable adjusting sheave (6). - The elevator main rope elongation compensating apparatus according to claim 1 further comprising:a guide apparatus (8) for guiding linear displacement of said adjusting sheave (6); anda sheave driving machine (7) for sliding said adjusting sheave (6) along said guide apparatus (8).
- The elevator main rope elongation compensating apparatus according to claim 1 further comprising:a pivotable arm (11) mounted with said adjusting sheave (6); anda sheave driving machine (12) for displacing said adjusting sheave (6) by pivoting said arm (11).
- The elevator main rope elongation compensating apparatus according to any one of claims 1 to 3 further comprising a detector apparatus (9) for detecting changes in a length of said main rope (3), said adjusting sheave (6) being displaced automatically in response to information from said detector apparatus (9).
- The elevator main rope elongation compensating apparatus according to any one of claims 1 to 4 wherein said adjusting sheave (6) is disposed on an opposite side of said main rope (3) from said drive sheave (1a) and said deflection sheave (2).
- The elevator main rope elongation compensating apparatus according to any one of claims 1 to 4 wherein said adjusting sheave (6) is disposed on a like side of said main rope (3) as said drive sheave (1a) and said deflection sheave (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2000/007847 WO2002038481A1 (en) | 2000-11-08 | 2000-11-08 | Main rope elongation compensating device for elevator |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1357074A1 EP1357074A1 (en) | 2003-10-29 |
EP1357074A4 EP1357074A4 (en) | 2008-10-01 |
EP1357074B1 true EP1357074B1 (en) | 2009-07-01 |
Family
ID=11736669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00974828A Expired - Lifetime EP1357074B1 (en) | 2000-11-08 | 2000-11-08 | Main rope elongation compensating device for elevator |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1357074B1 (en) |
JP (1) | JPWO2002038481A1 (en) |
CN (1) | CN1217846C (en) |
DE (1) | DE60042499D1 (en) |
WO (1) | WO2002038481A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2448892C2 (en) * | 2007-02-02 | 2012-04-27 | Инвенцио Аг | Elevator and method of its control |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI118079B (en) * | 2004-03-26 | 2007-06-29 | Kone Corp | Elevator, Method for Preventing and / or Stopping Elevator Movement and Using a Device for Preventing and / or Stopping Elevator Cart Movement in an Elevator |
ES2379657T3 (en) * | 2004-05-28 | 2012-04-30 | Mitsubishi Denki Kabushiki Kaisha | Elevator rope slip system and elevator system |
ATE465967T1 (en) | 2005-03-12 | 2010-05-15 | Thyssenkrupp Elevator Ag | ELEVATOR SYSTEM |
EP2873638A1 (en) * | 2013-11-14 | 2015-05-20 | Inventio AG | Elevator drive |
WO2016203650A1 (en) * | 2015-06-19 | 2016-12-22 | 三菱電機株式会社 | Elevator control apparatus and method for estimating expansion/contraction amount of governor rope |
CN104973512B (en) * | 2015-07-05 | 2017-06-13 | 浙江麒龙起重机械有限公司 | A kind of crane lifting rope swing limiting mechanism |
TWI703081B (en) | 2015-12-22 | 2020-09-01 | 瑞士商伊文修股份有限公司 | Lift system,method for setting a length of a section of a traction medium in a reservoir with such a lift system and use of a reservoir |
CN110052350A (en) * | 2019-05-29 | 2019-07-26 | 江苏鑫诚润建设有限公司 | A kind of unmanned automatic rust-removing and spray equipment for reservoir walls |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50114862U (en) * | 1974-02-28 | 1975-09-19 | ||
BR9500779A (en) * | 1994-03-02 | 1995-10-24 | Inventio Ag | Cable as a support medium for elevators |
JPH0859106A (en) * | 1994-08-18 | 1996-03-05 | Mitsubishi Denki Bill Techno Service Kk | Landing error correction device for elevator |
JP2000118914A (en) * | 1998-10-08 | 2000-04-25 | Hitachi Building Systems Co Ltd | Tensile force compensation device of main rope for elevator |
-
2000
- 2000-11-08 WO PCT/JP2000/007847 patent/WO2002038481A1/en active Application Filing
- 2000-11-08 DE DE60042499T patent/DE60042499D1/en not_active Expired - Lifetime
- 2000-11-08 JP JP2002527215A patent/JPWO2002038481A1/en not_active Withdrawn
- 2000-11-08 EP EP00974828A patent/EP1357074B1/en not_active Expired - Lifetime
- 2000-11-08 CN CN00818268.XA patent/CN1217846C/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2448892C2 (en) * | 2007-02-02 | 2012-04-27 | Инвенцио Аг | Elevator and method of its control |
Also Published As
Publication number | Publication date |
---|---|
EP1357074A1 (en) | 2003-10-29 |
JPWO2002038481A1 (en) | 2004-03-18 |
WO2002038481A1 (en) | 2002-05-16 |
CN1420838A (en) | 2003-05-28 |
DE60042499D1 (en) | 2009-08-13 |
EP1357074A4 (en) | 2008-10-01 |
CN1217846C (en) | 2005-09-07 |
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