EP1736431A1 - Elevator apparatus - Google Patents
Elevator apparatus Download PDFInfo
- Publication number
- EP1736431A1 EP1736431A1 EP04727367A EP04727367A EP1736431A1 EP 1736431 A1 EP1736431 A1 EP 1736431A1 EP 04727367 A EP04727367 A EP 04727367A EP 04727367 A EP04727367 A EP 04727367A EP 1736431 A1 EP1736431 A1 EP 1736431A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- car
- counterweight
- hoistway
- rope
- main
- 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.)
- Granted
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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
- B66B11/0065—Roping
- B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
- B66B11/009—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave with separate traction and suspension ropes
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- 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 a traction-type elevator apparatus having such a structure that a car and a counterweight are suspended in a hoistway by a main rope.
- JP 7-10434 A discloses a conventional machine room less elevator apparatus having such a structure that a car and a counterweight are suspended in a hoistway by a 2:1 roping system.
- a 2:1 roping system In such an elevator apparatus, it is necessary to provide the car and the counterweight with sash pulleys, resulting in a complicated construction and high cost.
- the RPM of a drive sheave is high, which means there is a fear of an increase in the vibration and noise.
- JP 11-310372 A discloses a conventional machine room less elevator apparatus constructed such that a car and a counterweight are suspended in a hoistway by a 1:1 roping system by two lines of rope. As compared with adopting the 2 : 1 roping system, such an elevator apparatus allows a reduction of the RPM of the drive sheave by half. However, since the suspension load is doubled, it is necessary to increase the rigidity of the components, such as a driving machine, guide rails, and a support beam, so that there is a fear of an increase in cost and an increase in installation space.
- JP 11-310372 A also discloses an elevator apparatus using two driving machines. Since it requires two driving machines, an increase in cost and a complicated control operation are involved.
- the present invention has been made to solve the above-mentioned problems. It is an object of the present invention to provide an elevator apparatus which allows simplification in construction and helps to avoid an increase in the RPM of a drive sheave while restraining an increase in suspension load.
- An elevator apparatus includes: a driving machine having a drive sheave; a car which has a first rope connecting portion provided on one side with respect to a width direction and a second rope connecting portion provided on the other side with respect to the width direction and which is caused to ascend and descend in a hoistway by the driving machine; a counterweight caused to ascend and descend in the hoistway by the driving machine; a first main rope which has a first end portion connected to the first rope connecting portion and a second end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway; and a second main rope which has a third end portion connected to the second rope connecting portion and a fourth end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway, in which only the first main rope of the first and second main ropes is wrapped around the drive sheave, and in which, provided in the upper portion of the hoistway is a main rope return pulley around which only the second main rope of the first and second main ropes
- an elevator apparatus includes: driving machine having a drive sheave; a car and a counterweight that are caused to ascend and descend in a hoistway by the driving machine; and a main rope wrapped around the drive sheave and suspending the car and the counterweight in the hoistway, in which the car has a first rope connecting portion provided on one side thereof with respect to a width direction and a second rope connecting portion provided on the other side thereof with respect to the width direction, in which the main rope has a first end portion connected to the first rope connecting portion and a second end portion connected to the second rope connecting portion, in which, provided in the upper portion of the hoistway is a second end portion side return pulley around which the main rope is wrapped, in which the counterweight is provided with a rotatable counterweight sash pulley, and in which the main rope is wrapped successively, starting from the first end portion side, around the drive sheave, the counterweight sash pulley, and the second end portion side return pulley.
- Fig. 1 is a perspective view of a main portion of an elevator apparatus according to Embodiment 1 of the present invention
- Fig. 2 is a plan view of the elevator apparatus of Fig. 1.
- a pair of car guide rails 2 installed in a hoistway 1 are a pair of car guide rails 2 (omitted in Fig. 1) and a pair of counterweight guide rails 3.
- a car 4 is guided by the car guide rails 2 as it ascends and descends in the hoistway 1. Further, the car 4 has a front surface 4a, a back surface 4b, a first side surface 4c, and a second side surface 4d.
- a car entrance 4e is provided in the front surface 4a.
- a counterweight 5 is guided by the counterweight guide rails 3 as it ascends and descends in the hoistway 1.
- the counterweight 5 is arranged at the rear of the car 4 so that it faces the back surface 4b of the car 4 when it is positioned at the same height as the car 4.
- a straight line connecting between the car guide rails 2 is parallel to a straight line connecting between counterweight guide rails 3.
- a first rope connecting portion 6 is provided on one side (the first side surface 4c side) of the car 4 with respect to the width direction thereof.
- a second rope connecting portion 7 is provided on the other side (the second side surface 4d side) of the car 4 with respect to the width direction thereof.
- the first and second rope connecting portions 6, 7 are provided at the lower end portion of the car 4.
- a driving machine (hoisting machine) 8 for raising and lowering the car 4 and the counterweight 5.
- the driving machine 8 is supported by the upper portion of at least one of the guide rails 2, 3 or a support beam (not shown) fixed to the building side.
- the driving machine 8 has a driving machine main body 9 including a motor and a brake, and a drive sheave 10 rotated by the driving machine main body 9.
- a driving machine main body 9 including a motor and a brake, and a drive sheave 10 rotated by the driving machine main body 9.
- a thin-type hoisting machine having an axial dimension smaller than an outer dimension thereof in a direction perpendicular to the axial direction.
- the motor of the thin-type hoist there is used, for example, a permanent magnet type motor (PM motor).
- the driving machine 8 is arranged such that the rotation axis of the drive sheave 10 is parallel to the width direction of the car 4 and is horizontal. Further, the driving machine 8 is arranged such that, as seen in the plane of vertical projection, the driving machine main body 9 is situated on the car 4 side, and that the drive sheave 10 is situated on a hoistway wall 1a side.
- the first deflection wheel 11, the secondmain rope return pulley 12, and the second deflection wheel 13 are supported by the support beam.
- the first deflection wheel 11, the second main rope return pulley 12, and the second deflection wheel 13 are arranged such that their rotation axes are parallel to the rotation axis of the drive sheave 10.
- the driving machine 8 and the first deflection wheel 11 are arranged between the first side surface 4c of the car 4 and the hoistway wall 1a opposed to the first side surface 4c.
- the second main rope return pulley 12 and the second deflection wheel 13 are arranged between the second side surface 4d of the car 4 and a hoistway wall 1b opposed to the second side surface 4d.
- the drive sheave 10 and the first deflection wheel 11, and the second main rope return pulley 12 and the second deflection wheel 13, are arranged substantially symmetrically with respect to the center line of the car 4 with respect to the width direction thereof.
- a plurality of first main ropes (driving ropes) 14 are wrapped around the drive sheave 10 and the first deflection wheel 11.
- Each of the first main ropes 14 has a first end portion 14a connected to the first rope connecting portion 6 and a second end portion 14b connected to the counterweight 5.
- the second end portion 14b is connected to the upper portion of one end portion of the counterweight 5 with respect to the width direction thereof.
- a plurality of second main ropes are wrapped around the second main rope return pulley 12 and the second deflection wheel 13.
- Each of the second main ropes 15 has a third end portion 15a connected to the second rope connecting portion 7, and a fourth end portion 15b connected to the counterweight 5.
- the fourth end portion 15b is connected to the upper portion of the other end portion of the counterweight 5 with respect to the width direction thereof.
- the car 4 and the counterweight 5 are suspended in the hoistway 1 by the 1:1 roping system by the first main ropes 14 and the second main ropes 15.
- the car 4 and the counterweight 5 are caused to ascend and descend in the hoistway 1 by the driving force of the driving machine 8 through the first main ropes 14.
- first and second main ropes 14, 15 are used two lines of mutually independent main ropes, that is, the first and second main ropes 14, 15.
- the first and second main ropes 14, 15 are arranged without joining each other.
- first and second main ropes 14, 15 only the first main ropes 14 are wrapped around the drive sheave 10. Of the first and second main ropes 14, 15, only the second main ropes 15 are wrapped around the second main rope return pulley 12.
- first and second main ropes 14, 15 there are used, for example, resin-coated ropes.
- outer layer covering members formed of a high-friction resin material.
- the outer layer covering members are constructed of a high-friction resin material having a coefficient of friction of 0.2 or more, for example, a polyurethane resin.
- the main ropes are divided into the first and second main ropes 14, 15, and only the first main ropes 14 are wrapped around the drive sheave 10, with only the second main ropes 15 being wrapped around the second main rope return pulley 12, whereby the suspension load is distributed, making it possible to keep the load applied to the driving machine 8, the main ropes 14, 15, the guide rails 2, 3, the support beam, etc. at a level equivalent to that in the case of the 2:1 roping system. As a result, it is possible to keep the rigidity of the apparatus at a low level, thereby restraining an increase in cost.
- first and second rope connecting portions 6, 7 are arranged on either side of the car 4, it is possible to suspend the car 4 in a stable manner.
- resin-coated ropes as the first and second main ropes 14, 15, it is possible to improve the traction capacity, making it possible to run the car 4 in a stable manner solely with the traction force on the first main ropes 14 side. Further, since resin-coated ropes allow further enhancement in flexibility than simple steel ropes, it is possible to diminish the diameter of the drive sheave 10 and the diameter of the second main rope return pulley 12.
- a thin-type hoisting machine is used as the driving machine 8, and the driving machine 8 is arranged between the first side surface 4c and the hoistway wall 1a as seen in the plane of vertical projection, so that it is possible to achieve a reduction in overhead dimension without increasing the planar dimension of the hoistway 1.
- first and second rope connecting portions 6, 7 are provided below the upper end portion of the car 4, it is possible to secure the clearance between the rope connecting portions 6, 7 and the driving machine 8 and the return pulley 12 that are situated above them, thereby making it possible to achieve a reduction in overhead dimension.
- Fig. 3 is a perspective view of a main portion of an elevator apparatus according to Embodiment 2 of the present invention
- Fig. 4 is a plan view of the elevator apparatus of Fig. 3.
- the driving machine 8 is arranged in the lower portion of the hoistway 1 (in the vicinity of the bottom portion thereof).
- the driving machine 8 is arranged such that the rotation axis of the drive sheave 10 is parallel to the depth direction of the car 4 and is horizontal.
- the driving machine 8 is arranged between the back surface 4b of the car 4 and a hoistway wall 1c opposed to the back surface 4b as seen in the plane of vertical projection.
- the driving machine 8 is arranged beside the car 5 as seen in the plane of vertical projection.
- first main rope return pulleys 21 In the upper portion of the hoistway 1, there are arranged a pair of first main rope return pulleys 21 and a pair of second main rope return pulleys 22. In Fig. 3, only one of each pair of return pulleys 21, 22 is shown.
- the return pulleys 21, 22 are arranged such that their rotation axes are parallel to the width direction of the car 4 and are horizontal.
- the return pulleys 21, 22 are arranged between the side surfaces 4c, 4d of the car 4 and the hoistway walls 1a, 1b as seen in the plane of vertical projection. Further, the return pulley 21 and the return pulley 22 are arranged substantially symmetrically with respect to the center line of the car 4 with respect to the width direction thereof.
- a counterweight side return pulley 23 in the upper portion of the hoistway 1, there is arranged a counterweight side return pulley 23.
- the counterweight side return pulley 23 is arranged such that the rotation axis thereof is parallel to the depth direction of the car 4 and is horizontal. Further, the counterweight side return pulley 23 is arranged between the back surface 4c of the car 4 and the hoistway wall 1c as seen in the plane of vertical projection. Further, the counterweight side return pulley 23 is arranged between the drive sheave 10 and the counter weight 5 as seen in the plane of vertical projection.
- the first main ropes 14 are successively wrapped, starting from the first end portion 14a side, around the first main rope return pulley 21, the drive sheave 10, and the counterweight side return pulley 23.
- the second main ropes 15 are wrapped around the second main rope return pulley 22.
- the car 4 and the counterweight 5 are suspended by the 1:1 roping system in the hoistway 1 by the first main ropes 14 and the second main ropes 15.
- the car 4 and the counterweight 5 are caused to ascend and descend in the hoistway 1 through the first main ropes 14 by the driving force of the driving machine 8.
- the driving machine 8 is arranged in the lower portion of the hoistway 1, it is possible to easilyperformmaintenance operation on the driving machine 8 from the pit (bottom portion) of the hoistway 1.
- Fig. 5 is a perspective view of a main portion of an elevator apparatus according to Embodiment 3 of the present invention
- Fig. 6 is a plan view of the elevator apparatus of Fig. 5.
- the driving machine 8 is arranged between the first side surface 4c of the car 4 and the hoistway wall 1a as seen in the plane of vertical projection. Further, the driving machine 8 is arranged such that the rotation axis of the drive sheave 10 is parallel to the width direction of the car 4 and is horizontal.
- the first and second rope connecting portions 6, 7 are arranged such that the straight line connecting them to each other passes the center of gravity of the car 4 or near the same as seen in the plane of vertical projection. That is, the first and second rope connecting portions 6, 7 are arranged symmetrically with respect to the center of gravity of the car 4 as seen in the plane of vertical projection.
- the straight line connecting the first and second rope connecting portions 6, 7 crosses the straight line connecting the car guide rails 2. That is, with respect to the depth direction of the car 4, the first rope connecting portion 6 is arranged at the rear of the car guide rails 2, and the second rope connecting portion 7 is arranged in front of the car guide rails 2.
- Fig. 7 is a plan view of a main portion of an elevator apparatus according to Embodiment 4 of the present invention.
- This embodiment differs from Embodiment 2 in the planar configuration of the car 4.
- Provided on the first and second side surfaces 4c, 4d of the car 4 are inclined surfaces 4f, 4g that are inclined so as to gradually diminish the width dimension as they extend rearwards in the depth direction of the car 4.
- the planar configuration of the car 4 exhibits a hexagonal configuration, with the rear corner portions thereof being beveled.
- the first main rope return pulley 21 and the second main rope return pulley 22 are arranged such that their rotation axes are inclined with respect to the width direction of the car 4. That is, as seen in the plane of vertical projection, the rotation axes of the return pulleys 21, 22 are substantially perpendicular to the inclined surfaces 4f, 4g. And, the return pulleys 21, 22 are arranged between the inclined surfaces 4f, 4g and the hoistway walls 1a, 1b as seen in the plane of vertical projection. Otherwise, this embodiment is of the same construction as Embodiment 2.
- both the return pulleys 21, 22 can be arranged right above the counterweight 5, making it possible to cause the counterweight 5 to ascend and descend smoothly. Further, it is also possible to achieve a reduction in overhead dimension.
- Fig. 8 is a perspective view of a main portion of an elevator apparatus according to Embodiment 5 of the present invention.
- a rotatable counterweight sash pulley 24 is provided on top of the counterweight 5.
- the car 4 and the counterweight 5 are suspended in the hoistway 1 by a plurality of main ropes 25. While in Embodiments 1 through 4 two lines of main ropes 14, 15 are used, in Embodiment 5, only one line of main ropes 25 is used. As the main ropes 25, it is possible to use resin-coated ropes.
- first end portion side return pulley 26 In the upper portion of the hoistway 1, there are provided a first end portion side return pulley 26, a second end portion side return pulley 27, and a counterweight side return pulley 28.
- the first and second end portion side return pulleys 26, 27 are arranged such that their rotation axes are parallel to the width direction of the car 4 and are horizontal. Further, the return pulleys 26, 27 are arranged between the side surfaces of the car 4 and hoistway walls as seen in the plane of vertical projection. Further, the first end portion side return pulley 26 and the second end portion side return pulley 27 are arranged substantially symmetrically with respect to the center line of the car 4 with respect to the width direction thereof as seen in the plane of vertical projection.
- the counterweight side return pulley 28 is arranged such that the rotation axis thereof is parallel to the depth direction of the car 4 and is horizontal. Further, the return pulley 28 is arranged between the back surface of the car 4 and a hoistway wall as seen in the plane of vertical projection. Further, the return pulley 28 is arranged between the drive sheave 10 and the counterweight 5 as seen in the plane of vertical projection.
- the main ropes 25 have first end portions 25a connected to the first rope connecting portion 6 (not shown in Fig. 8) and second end portions 25b connected to the second rope connecting portion 7. Further, the main ropes 25 are wrapped successively, starting from the first end portion 25a side, around the first end portion side return pulley 26, the drive sheave 10 (not shown in Fig. 8), the counterweight side return pulley 28, the counterweight sash pulley 24, and the second end portion side return pulley 27.
- Embodiment 5 is substantially of the same construction as one obtained by modifying Embodiment 2 such that the second end portions 14b and the fourth end portions 15b are connected together and wrapped around the counterweight sash pulley 24.
- the car 4 and the counterweight 5 of Embodiment 5 are suspended in the hoistway 1 by the 1:1 roping system by the main ropes 25.
- Embodiment 5 While in Embodiment 5 the counterweight sash pulley 24 is applied to the layout of Embodiment 2, it is also possible to apply the counterweight sash pulley to the layout of Embodiment 1, 3, or 4.
- the driving machine is not necessarily restricted to the thin-type hoist.
Abstract
Description
- The present invention relates to a traction-type elevator apparatus having such a structure that a car and a counterweight are suspended in a hoistway by a main rope.
- For example,
JP 7-10434 A - Further,
JP 11-310372 A - Further,
JP 11-310372 A - The present invention has been made to solve the above-mentioned problems. It is an object of the present invention to provide an elevator apparatus which allows simplification in construction and helps to avoid an increase in the RPM of a drive sheave while restraining an increase in suspension load.
- An elevator apparatus according to the present invention includes: a driving machine having a drive sheave; a car which has a first rope connecting portion provided on one side with respect to a width direction and a second rope connecting portion provided on the other side with respect to the width direction and which is caused to ascend and descend in a hoistway by the driving machine; a counterweight caused to ascend and descend in the hoistway by the driving machine; a first main rope which has a first end portion connected to the first rope connecting portion and a second end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway; and a second main rope which has a third end portion connected to the second rope connecting portion and a fourth end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway, in which only the first main rope of the first and second main ropes is wrapped around the drive sheave, and in which, provided in the upper portion of the hoistway is a main rope return pulley around which only the second main rope of the first and second main ropes is wrapped.
- Further, an elevator apparatus according to the present invention includes: driving machine having a drive sheave; a car and a counterweight that are caused to ascend and descend in a hoistway by the driving machine; and a main rope wrapped around the drive sheave and suspending the car and the counterweight in the hoistway, in which the car has a first rope connecting portion provided on one side thereof with respect to a width direction and a second rope connecting portion provided on the other side thereof with respect to the width direction, in which the main rope has a first end portion connected to the first rope connecting portion and a second end portion connected to the second rope connecting portion, in which, provided in the upper portion of the hoistway is a second end portion side return pulley around which the main rope is wrapped, in which the counterweight is provided with a rotatable counterweight sash pulley, and in which the main rope is wrapped successively, starting from the first end portion side, around the drive sheave, the counterweight sash pulley, and the second end portion side return pulley.
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- Fig. 1 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 1 of the present invention; - Fig. 2 is a plan view of the elevator apparatus of Fig. 1;
- Fig. 3 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 2 of the present invention; - Fig. 4 is a plan view of the elevator apparatus of Fig. 3;
- Fig. 5 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 3 of the present invention; - Fig. 6 is a plan view of the elevator apparatus of Fig. 5;
- Fig. 7 is a plan view of a main portion of an elevator apparatus according to
Embodiment 4 of the present invention; and - Fig. 8 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 5 of the present invention. - In the following, preferred embodiments of the present invention will be described with reference to the drawings.
- Fig. 1 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 1 of the present invention, and Fig. 2 is a plan view of the elevator apparatus of Fig. 1. - In the drawings, installed in a
hoistway 1 are a pair of car guide rails 2 (omitted in Fig. 1) and a pair ofcounterweight guide rails 3. Acar 4 is guided by thecar guide rails 2 as it ascends and descends in thehoistway 1. Further, thecar 4 has afront surface 4a, aback surface 4b, afirst side surface 4c, and asecond side surface 4d. Acar entrance 4e is provided in thefront surface 4a. - A
counterweight 5 is guided by thecounterweight guide rails 3 as it ascends and descends in thehoistway 1. Thecounterweight 5 is arranged at the rear of thecar 4 so that it faces theback surface 4b of thecar 4 when it is positioned at the same height as thecar 4. As seen in a plane of vertical projection (Fig. 2), a straight line connecting between thecar guide rails 2 is parallel to a straight line connecting betweencounterweight guide rails 3. - A first
rope connecting portion 6 is provided on one side (thefirst side surface 4c side) of thecar 4 with respect to the width direction thereof. A secondrope connecting portion 7 is provided on the other side (thesecond side surface 4d side) of thecar 4 with respect to the width direction thereof. The first and secondrope connecting portions car 4. - In the upper portion of the
hoistway 1, there is installed a driving machine (hoisting machine) 8 for raising and lowering thecar 4 and thecounterweight 5. Thedriving machine 8 is supported by the upper portion of at least one of theguide rails - The
driving machine 8 has a driving machinemain body 9 including a motor and a brake, and adrive sheave 10 rotated by the driving machinemain body 9. As thedriving machine 8, there is used a thin-type hoisting machine having an axial dimension smaller than an outer dimension thereof in a direction perpendicular to the axial direction. As the motor of the thin-type hoist, there is used, for example, a permanent magnet type motor (PM motor). - The
driving machine 8 is arranged such that the rotation axis of thedrive sheave 10 is parallel to the width direction of thecar 4 and is horizontal. Further, thedriving machine 8 is arranged such that, as seen in the plane of vertical projection, the driving machinemain body 9 is situated on thecar 4 side, and that thedrive sheave 10 is situated on ahoistway wall 1a side. - In the upper portion of the
hoistway 1, there are provided a rotatable,first deflection wheel 11, a rotatable, second mainrope return pulley 12, and a rotatable,second deflection wheel 13. Thefirst deflection wheel 11, the secondmainrope return pulley 12, and thesecond deflection wheel 13 are supported by the support beam. Thefirst deflection wheel 11, the second mainrope return pulley 12, and thesecond deflection wheel 13 are arranged such that their rotation axes are parallel to the rotation axis of thedrive sheave 10. - As seen in the plane of vertical projection, the
driving machine 8 and thefirst deflection wheel 11 are arranged between thefirst side surface 4c of thecar 4 and thehoistway wall 1a opposed to thefirst side surface 4c. As seen in the plane of vertical projection, the second mainrope return pulley 12 and thesecond deflection wheel 13 are arranged between thesecond side surface 4d of thecar 4 and ahoistway wall 1b opposed to thesecond side surface 4d. - Further, as seen in the plane of vertical projection, the drive sheave 10 and the
first deflection wheel 11, and the second mainrope return pulley 12 and thesecond deflection wheel 13, are arranged substantially symmetrically with respect to the center line of thecar 4 with respect to the width direction thereof. - A plurality of first main ropes (driving ropes) 14 are wrapped around the
drive sheave 10 and thefirst deflection wheel 11. Each of the firstmain ropes 14 has afirst end portion 14a connected to the firstrope connecting portion 6 and asecond end portion 14b connected to thecounterweight 5. Thesecond end portion 14b is connected to the upper portion of one end portion of thecounterweight 5 with respect to the width direction thereof. - A plurality of second main ropes (ropes dedicated to suspension) are wrapped around the second main
rope return pulley 12 and thesecond deflection wheel 13. Each of the secondmain ropes 15 has athird end portion 15a connected to the secondrope connecting portion 7, and afourth end portion 15b connected to thecounterweight 5. Thefourth end portion 15b is connected to the upper portion of the other end portion of thecounterweight 5 with respect to the width direction thereof. - The
car 4 and thecounterweight 5 are suspended in thehoistway 1 by the 1:1 roping system by the firstmain ropes 14 and the secondmain ropes 15. Thecar 4 and thecounterweight 5 are caused to ascend and descend in thehoistway 1 by the driving force of thedriving machine 8 through the firstmain ropes 14. - In this elevator apparatus, there are used two lines of mutually independent main ropes, that is, the first and second
main ropes main ropes - Of the first and second
main ropes main ropes 14 are wrapped around thedrive sheave 10. Of the first and secondmain ropes main ropes 15 are wrapped around the second mainrope return pulley 12. - As the first and second
main ropes - In this elevator apparatus having such a structure that the
car 4 and thecounterweight 5 are suspended by the 1:1 roping system, there is no need to mount sash pulleys on thecar 4 and thecounterweight 5, thus achieving simplification in construction. Further, the RPM of thedrive sheave 10 can be reduced to 1/2 as compared with that in the case of the 2:1 roping system. - Further, the main ropes are divided into the first and second
main ropes main ropes 14 are wrapped around thedrive sheave 10, with only the secondmain ropes 15 being wrapped around the second mainrope return pulley 12, whereby the suspension load is distributed, making it possible to keep the load applied to the drivingmachine 8, themain ropes guide rails - Further, there is provided only one driving
machine 8, so that it is possible to avoid an increase in cost and installation space for the drivingmachine 8. - Thus, in the elevator apparatus of
Embodiment 1, it is possible to simplify the construction and avoid an increase in the RPM of thedrive sheave 10 while restraining an increase in suspension load. - Further, since the first and second
rope connecting portions car 4, it is possible to suspend thecar 4 in a stable manner. - Further, by using resin-coated ropes as the first and second
main ropes car 4 in a stable manner solely with the traction force on the firstmain ropes 14 side. Further, since resin-coated ropes allow further enhancement in flexibility than simple steel ropes, it is possible to diminish the diameter of thedrive sheave 10 and the diameter of the second mainrope return pulley 12. - Furthermore, a thin-type hoisting machine is used as the driving
machine 8, and the drivingmachine 8 is arranged between thefirst side surface 4c and thehoistway wall 1a as seen in the plane of vertical projection, so that it is possible to achieve a reduction in overhead dimension without increasing the planar dimension of thehoistway 1. - Further, since the first and second
rope connecting portions car 4, it is possible to secure the clearance between therope connecting portions machine 8 and thereturn pulley 12 that are situated above them, thereby making it possible to achieve a reduction in overhead dimension. - Next, Fig. 3 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 2 of the present invention, and Fig. 4 is a plan view of the elevator apparatus of Fig. 3. - In the drawings, the driving
machine 8 is arranged in the lower portion of the hoistway 1 (in the vicinity of the bottom portion thereof). The drivingmachine 8 is arranged such that the rotation axis of thedrive sheave 10 is parallel to the depth direction of thecar 4 and is horizontal. Further, the drivingmachine 8 is arranged between theback surface 4b of thecar 4 and ahoistway wall 1c opposed to theback surface 4b as seen in the plane of vertical projection. Furthermore, the drivingmachine 8 is arranged beside thecar 5 as seen in the plane of vertical projection. - In the upper portion of the
hoistway 1, there are arranged a pair of first main rope return pulleys 21 and a pair of second main rope return pulleys 22. In Fig. 3, only one of each pair of return pulleys 21, 22 is shown. The return pulleys 21, 22 are arranged such that their rotation axes are parallel to the width direction of thecar 4 and are horizontal. - The return pulleys 21, 22 are arranged between the side surfaces 4c, 4d of the
car 4 and thehoistway walls return pulley 21 and thereturn pulley 22 are arranged substantially symmetrically with respect to the center line of thecar 4 with respect to the width direction thereof. - Further, in the upper portion of the
hoistway 1, there is arranged a counterweight side returnpulley 23. The counterweight side returnpulley 23 is arranged such that the rotation axis thereof is parallel to the depth direction of thecar 4 and is horizontal. Further, the counterweight side returnpulley 23 is arranged between theback surface 4c of thecar 4 and thehoistway wall 1c as seen in the plane of vertical projection. Further, the counterweight side returnpulley 23 is arranged between thedrive sheave 10 and thecounter weight 5 as seen in the plane of vertical projection. - The first
main ropes 14 are successively wrapped, starting from thefirst end portion 14a side, around the first mainrope return pulley 21, thedrive sheave 10, and the counterweight side returnpulley 23. The secondmain ropes 15 are wrapped around the second mainrope return pulley 22. - The
car 4 and thecounterweight 5 are suspended by the 1:1 roping system in thehoistway 1 by the firstmain ropes 14 and the secondmain ropes 15. Thecar 4 and thecounterweight 5 are caused to ascend and descend in thehoistway 1 through the firstmain ropes 14 by the driving force of the drivingmachine 8. - Of the first and second
main ropes main ropes 14 are wrapped around thedrive sheave 10. Of the first and secondmain ropes main ropes 15 are wrapped around the second mainrope return pulley 22. Otherwise, this embodiment is of the same construction asEmbodiment 1. - In this way, even in the case where the driving
machine 8 is arranged in the lower portion of thehoistway 1, it is possible to achieve simplification in construction and avoid an increase in the RPM of thedrive sheave 10 while restraining an increase in suspension load. - Further, since the driving
machine 8 is arranged in the lower portion of thehoistway 1, it is possible to easilyperformmaintenance operation on the drivingmachine 8 from the pit (bottom portion) of thehoistway 1. - Further, since the return pulleys 21, 22, and 23 are arranged between the side surfaces 4c, 4d and the
back surface 4b, and thehoistway walls hoistway 1. - Next, Fig. 5 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 3 of the present invention, and Fig. 6 is a plan view of the elevator apparatus of Fig. 5. In the drawings, the drivingmachine 8 is arranged between thefirst side surface 4c of thecar 4 and thehoistway wall 1a as seen in the plane of vertical projection. Further, the drivingmachine 8 is arranged such that the rotation axis of thedrive sheave 10 is parallel to the width direction of thecar 4 and is horizontal. - The first and second
rope connecting portions car 4 or near the same as seen in the plane of vertical projection. That is, the first and secondrope connecting portions car 4 as seen in the plane of vertical projection. - Further, as seen in the plane of vertical projection, the straight line connecting the first and second
rope connecting portions car 4, the firstrope connecting portion 6 is arranged at the rear of thecar guide rails 2, and the secondrope connecting portion 7 is arranged in front of the car guide rails 2. - Only one first main
rope return pulley 21 is used. The distance between the secondmain rope return pulleys 22 and the width dimension of thecounterweight 5 are larger than those inEmbodiment 2. Otherwise, this embodiment is of the same construction asEmbodiment 2. - In this way, even in the case where the driving
machine 8 is arranged beside thecar 4, it is possible to achieve simplification in construction and avoid an increase in the RPM of thedrive sheave 10 while restraining an increase in suspension load. - Further, by suspending the
car 4 substantially at the position of its center of gravity, it is possible to cause thecar 4 to ascend and descend in a stable manner. - Next, Fig. 7 is a plan view of a main portion of an elevator apparatus according to
Embodiment 4 of the present invention. This embodiment differs fromEmbodiment 2 in the planar configuration of thecar 4. Provided on the first and second side surfaces 4c, 4d of thecar 4 areinclined surfaces car 4. Thus, the planar configuration of thecar 4 exhibits a hexagonal configuration, with the rear corner portions thereof being beveled. - The first main
rope return pulley 21 and the second mainrope return pulley 22 are arranged such that their rotation axes are inclined with respect to the width direction of thecar 4. That is, as seen in the plane of vertical projection, the rotation axes of the return pulleys 21, 22 are substantially perpendicular to theinclined surfaces inclined surfaces hoistway walls Embodiment 2. - Due to this construction, it is possible to diminish the admission angle of the
main ropes car 4 and thecounterweight 5 to ascend and descend smoothly and to increase the service life of themain ropes counterweight 5, making it possible to cause thecounterweight 5 to ascend and descend smoothly. Further, it is also possible to achieve a reduction in overhead dimension. - Next, Fig. 8 is a perspective view of a main portion of an elevator apparatus according to
Embodiment 5 of the present invention. In the drawing, a rotatablecounterweight sash pulley 24 is provided on top of thecounterweight 5. Thecar 4 and thecounterweight 5 are suspended in thehoistway 1 by a plurality ofmain ropes 25. While inEmbodiments 1 through 4 two lines ofmain ropes Embodiment 5, only one line ofmain ropes 25 is used. As themain ropes 25, it is possible to use resin-coated ropes. - In the upper portion of the
hoistway 1, there are provided a first end portion side returnpulley 26, a second end portion side returnpulley 27, and a counterweight side returnpulley 28. The first and second end portion side return pulleys 26, 27 are arranged such that their rotation axes are parallel to the width direction of thecar 4 and are horizontal. Further, the return pulleys 26, 27 are arranged between the side surfaces of thecar 4 and hoistway walls as seen in the plane of vertical projection. Further, the first end portion side returnpulley 26 and the second end portion side returnpulley 27 are arranged substantially symmetrically with respect to the center line of thecar 4 with respect to the width direction thereof as seen in the plane of vertical projection. - The counterweight side return
pulley 28 is arranged such that the rotation axis thereof is parallel to the depth direction of thecar 4 and is horizontal. Further, thereturn pulley 28 is arranged between the back surface of thecar 4 and a hoistway wall as seen in the plane of vertical projection. Further, thereturn pulley 28 is arranged between thedrive sheave 10 and thecounterweight 5 as seen in the plane of vertical projection. - The
main ropes 25 havefirst end portions 25a connected to the first rope connecting portion 6 (not shown in Fig. 8) andsecond end portions 25b connected to the secondrope connecting portion 7. Further, themain ropes 25 are wrapped successively, starting from thefirst end portion 25a side, around the first end portion side returnpulley 26, the drive sheave 10 (not shown in Fig. 8), the counterweight side returnpulley 28, thecounterweight sash pulley 24, and the second end portion side returnpulley 27. -
Embodiment 5 is substantially of the same construction as one obtained by modifyingEmbodiment 2 such that thesecond end portions 14b and thefourth end portions 15b are connected together and wrapped around thecounterweight sash pulley 24. Thecar 4 and thecounterweight 5 ofEmbodiment 5 are suspended in thehoistway 1 by the 1:1 roping system by themain ropes 25. - In this elevator apparatus also, it is possible to achieve simplification in construction and to avoid an increase in the RPM of the
drive sheave 10 while restraining an increase in suspension load. - Further, due to the provision of the
counterweight sash pulley 24, it is possible to automatically absorb the imbalance of the tension of themain ropes 25 on either side of thecounterweight 5. - While in
Embodiment 5 thecounterweight sash pulley 24 is applied to the layout ofEmbodiment 2, it is also possible to apply the counterweight sash pulley to the layout ofEmbodiment - Further, while a thin-type hoisting machine is adopted in
Embodiments 1 through 5 described above, the driving machine is not necessarily restricted to the thin-type hoist.
Claims (8)
- An elevator apparatus comprising:a driving machine having a drive sheave;a car which has a first rope connecting portion provided on one side with respect to a width direction and a second rope connecting portion provided on the other side with respect to the width direction and which is caused to ascend and descend in a hoistway by the driving machine;a counterweight caused to ascend and descend in the hoistway by the driving machine;a first main rope which has a first end portion connected to the first rope connecting portion and a second end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway; anda second main rope which has a third end portion connected to the second rope connecting portion and a fourth end portion connected to the counterweight and which suspends the car and the counterweight in the hoistway,wherein, of the first and second main ropes, only the first main rope is wrapped around the drive sheave, anda secondmain rope return pulley is provided in the upper portion of the hoistway, around which only the second main rope of the first and second main ropes is wrapped.
- An elevator apparatus comprising:a driving machine having a drive sheave;a car and a counterweight that are caused to ascend and descend in a hoistway by the driving machine; anda main rope wrapped around the drive sheave and suspending the car and the counterweight in the hoistway,wherein the car has a first rope connecting portion provided on one side thereof with respect to a width direction and a second rope connecting portion provided on the other side thereof with respect to the width direction,the main rope has a first end portion connected to the first rope connecting portion and a second end portion connected to the second rope connecting portion,a second end portion side return pulley is provided in the upper portion of the hoistway, around which the main rope is wrapped,the counterweight is provided with a rotatable counterweight sash pulley, andthe main rope is wrapped successively, starting from the first end portion side, around the drive sheave, the counterweight sash pulley, and the second end portion side return pulley.
- An elevator apparatus according to Claim 1 or Claim 2, wherein the main ropes are resin-coated ropes provided with outer layer covering members formed of a high friction resin material positioned in outer peripheral portions thereof.
- An elevator apparatus according to Claim 1 or Claim 2, wherein the driving machine is a thin-type hoisting machine which has an axial dimension smaller than a dimension thereof in a direction perpendicular to the axial direction and which is arranged between the car and hoistway walls as seen in a plane of vertical projection.
- An elevator apparatus according to Claim 1 or Claim 2, wherein the driving machine is arranged in a lower portion of the hoistway.
- An elevator apparatus according to Claim 1 or Claim 2, wherein the first and second rope connecting portions are provided below an upper end portion of the car.
- An elevator apparatus according to Claim 1 or Claim 2, wherein the first and second rope connecting portions are arranged symmetrically with respect to the center of gravity of the car as seen in a plane of vertical projection.
- An elevator apparatus according to Claim 1 or Claim 2, wherein provided on side surfaces of the car are inclined surfaces inclined such that the width dimension of the car 4 is gradually diminished rearwards in the depth direction thereof, and rotation axes of the return pulleys are substantially perpendicular to the inclined surfaces as seen in a plane of vertical projection.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/005289 WO2005100225A1 (en) | 2004-04-14 | 2004-04-14 | Elevator apparatus |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1736431A1 true EP1736431A1 (en) | 2006-12-27 |
EP1736431A4 EP1736431A4 (en) | 2009-12-02 |
EP1736431B1 EP1736431B1 (en) | 2011-03-23 |
Family
ID=35149897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04727367A Expired - Fee Related EP1736431B1 (en) | 2004-04-14 | 2004-04-14 | Elevator apparatus |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1736431B1 (en) |
JP (1) | JPWO2005100225A1 (en) |
CN (1) | CN100387503C (en) |
DE (1) | DE602004031981D1 (en) |
WO (1) | WO2005100225A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6738964B2 (en) * | 2017-06-06 | 2020-08-12 | 株式会社日立製作所 | Elevator |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0905081A2 (en) * | 1997-09-26 | 1999-03-31 | Kabushiki Kaisha Toshiba | Positioning of drive unit in an elevator shaft |
WO1999043596A2 (en) * | 1998-02-26 | 1999-09-02 | Otis Elevator Company | Elevator system having drive motor located adjacent to hoistway door |
US20030155185A1 (en) * | 2001-03-08 | 2003-08-21 | Masami Nomura | Elevator |
EP1448470A2 (en) * | 2001-11-23 | 2004-08-25 | Inventio Ag | Elevator with belt-type means of transmission, especially a toothed belt, as a means of support or driving means |
WO2005080250A1 (en) * | 2004-02-19 | 2005-09-01 | Mitsubishi Denki Kabushiki Kaisha | Machine room-less elevator |
EP1693330A1 (en) * | 2003-12-11 | 2006-08-23 | Mitsubishi Denki Kabushiki Kaisha | Elevator apparatus |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5991267U (en) * | 1982-12-11 | 1984-06-20 | 株式会社明電舎 | Hanging lifting device |
JPH0489787A (en) * | 1990-08-01 | 1992-03-23 | Mitsubishi Electric Corp | Elevator driving device |
JP4255523B2 (en) * | 1997-10-06 | 2009-04-15 | 東芝エレベータ株式会社 | Elevator |
JPH11310372A (en) * | 1998-04-28 | 1999-11-09 | Toshiba Elevator Co Ltd | Elevator equipment |
US6247557B1 (en) * | 1998-04-28 | 2001-06-19 | Kabushiki Kaisha Toshiba | Traction type elevator apparatus |
JP2000063057A (en) * | 1998-06-08 | 2000-02-29 | Meidensha Corp | Elevator |
JP2000247559A (en) * | 1999-02-24 | 2000-09-12 | Hitachi Ltd | Elevator device |
JP2001261257A (en) * | 2000-03-23 | 2001-09-26 | Mitsubishi Electric Corp | Elevator apparatus |
KR100511850B1 (en) * | 2000-08-09 | 2005-09-02 | 미쓰비시덴키 가부시키가이샤 | Elevator device |
JP2002179358A (en) * | 2000-12-19 | 2002-06-26 | Fujitec Co Ltd | Elevator device |
US7117977B2 (en) * | 2002-01-30 | 2006-10-10 | Mitsubishi Denki Kabushiki Kaisha | Elevator apparatus including car with suspending pulley devices on opposite sides of the car |
-
2004
- 2004-04-14 DE DE602004031981T patent/DE602004031981D1/en not_active Expired - Lifetime
- 2004-04-14 CN CNB2004800091895A patent/CN100387503C/en not_active Expired - Fee Related
- 2004-04-14 EP EP04727367A patent/EP1736431B1/en not_active Expired - Fee Related
- 2004-04-14 WO PCT/JP2004/005289 patent/WO2005100225A1/en not_active Application Discontinuation
- 2004-04-14 JP JP2006519119A patent/JPWO2005100225A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0905081A2 (en) * | 1997-09-26 | 1999-03-31 | Kabushiki Kaisha Toshiba | Positioning of drive unit in an elevator shaft |
WO1999043596A2 (en) * | 1998-02-26 | 1999-09-02 | Otis Elevator Company | Elevator system having drive motor located adjacent to hoistway door |
US20030155185A1 (en) * | 2001-03-08 | 2003-08-21 | Masami Nomura | Elevator |
EP1448470A2 (en) * | 2001-11-23 | 2004-08-25 | Inventio Ag | Elevator with belt-type means of transmission, especially a toothed belt, as a means of support or driving means |
EP1693330A1 (en) * | 2003-12-11 | 2006-08-23 | Mitsubishi Denki Kabushiki Kaisha | Elevator apparatus |
WO2005080250A1 (en) * | 2004-02-19 | 2005-09-01 | Mitsubishi Denki Kabushiki Kaisha | Machine room-less elevator |
DE112005000398T5 (en) * | 2004-02-19 | 2007-02-01 | Mitsubishi Denki K.K. | Machine roomless elevator |
Non-Patent Citations (1)
Title |
---|
See also references of WO2005100225A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1736431A4 (en) | 2009-12-02 |
CN1767997A (en) | 2006-05-03 |
DE602004031981D1 (en) | 2011-05-05 |
WO2005100225A1 (en) | 2005-10-27 |
EP1736431B1 (en) | 2011-03-23 |
CN100387503C (en) | 2008-05-14 |
JPWO2005100225A1 (en) | 2007-08-30 |
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