CN1761608A

CN1761608A - Elevator appts.

Info

Publication number: CN1761608A
Application number: CN200480007280.3A
Authority: CN
Inventors: 滨口修喜; 光井厚
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2004-03-01
Filing date: 2004-03-01
Publication date: 2006-04-19
Also published as: JPWO2005082767A1; WO2005082767A1; EP1724229A1; EP1724229A4

Abstract

An elevator apparatus, wherein a drive device lifting a car and a balance weight is disposed in a hoistway. The drive device comprises a drive sheave. A main rope suspending the car and the balance weight is wound around the drive sheave. The drive device is disposed so that the rotating shaft of the drive sheave is positioned horizontal. An idle wheel around which the main rope is wound is installed near the drive device. Since the main rope is wound around the idle wheel, the winding angle of the main rope around the drive sheave is increased.

Description

Elevator device

Technical Field

The present invention relates to an elevator apparatus in which a drive device for driving a car to ascend and descend is disposed in an elevator shaft.

Background

For example, japanese patent laying-open No. 2001-192191 discloses a conventional elevator apparatus in which a hoisting machine is disposed in a lower portion of an elevator shaft. A main rope for suspending a car and a counterweight is wound around a drive sheave of a hoisting machine. The main rope extends vertically upward from the drive sheave, and a contact angle at which the main rope is wound around the drive sheave is approximately 180 degrees.

However, in the conventional elevator apparatus, the contact angle of the drive sheave of the main rope is about 180 degrees, and the friction force may be insufficient. In this case, a large-diameter drive sheave must be used, which increases the size of the hoisting machine and limits the design layout. In addition, the rope grooves of the main sheave must be designed as undercut grooves having a large biting amount, which not only increases the cost but also shortens the life of the main rope.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus in which a drive device can be downsized and a main rope has a long life.

The elevator device of the invention comprises: a drive device arranged in the lifting shaft and having a drive sheave; a main rope wound around the drive sheave; a car and a counterweight suspended in the hoistway by a main rope and driven to ascend and descend by a driving force of a driving device; a rotating shaft of a driving rope wheel of the driving device is configured to be horizontal; an idler pulley wound with the main rope is disposed in the vicinity of the drive device; the contact angle of the main rope wound on the drive sheave is increased by winding the main rope on the idler sheave.

Drawings

Fig. 1 is a perspective view of an elevator apparatus according to a first embodiment of the present invention;

fig. 2 is a plan view of a main portion of the elevator apparatus in fig. 1;

fig. 3 is a cross-sectional view of the rope grooves of the drive sheave in fig. 1;

fig. 4 is a perspective view of an elevator apparatus according to a second embodiment of the present invention;

fig. 5 is a plan view of a main portion of the elevator apparatus in fig. 4;

fig. 6 is a perspective view of an elevator apparatus according to a third embodiment of the present invention;

fig. 7 is a plan view of a main portion of the elevator apparatus in fig. 6;

fig. 8 is a perspective view of an elevator apparatus according to a fourth embodiment of the present invention;

fig. 9 is a perspective view of an elevator apparatus according to a fifth embodiment of the present invention;

fig. 10 is a plan view of the main part of the elevator arrangement of fig. 9;

fig. 11 is a perspective view of an elevator apparatus according to a sixth embodiment of the present invention;

fig. 12 is a plan view of a main part of the elevator apparatus in fig. 11.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First embodiment

Fig. 1 is a perspective view of an elevator apparatus (machine room-less elevator apparatus) according to a first embodiment of the present invention, and fig. 2 is a plan view of a main part of the elevator in fig. 1.

In the figure, a pair of

car guide rails

2a and 2b and a pair of

counterweight guide rails

3a and 3b are provided in an elevator shaft. The car 4 is guided by the

car guide rails

2a and 2b and ascends and descends in the hoistway 1. The counterweight 5 is guided by

counterweight guide rails

3a and 3b and also ascends and descends in the hoistway 1.

When the counterweight 5 is at the same height position as the car 4, the counterweight 5 is disposed opposite the side surface 4a of the car 4 (counterweight side surface falling below).

A pair of

car suspending sheaves

6a and 6b are installed at the lower part of the car 4. A counterweight hanging rope wheel 7 is arranged on the upper part of the counterweight 5.

The support member (mounting beam) 8 is fixed to the back surface of the counterweight guide rail 3 a. A reinforcing diagonal member 9 is provided between the support member 8 and the counterweight guide rail 3 a.

Vibration-proof members 10a, 10b are provided between the counterweight guide rail 3a and the slope member 9 and the support member 8. That is, the support member 8 is fixed to the counterweight guide rail 3a by the vibration isolation members 10a and 10 b. As the vibration-proof members 10a and 10b, for example, an elastic body such as a rubber sheet can be used.

A driving device (hoisting machine) 11 for driving the car 4 and the counterweight 5 to ascend and descend is attached to the lower surface of the support member 8. The drive device 11 includes a drive device body 12 including a motor and a brake, and a drive sheave 13 driven to rotate by the drive device body 12.

As the drive device 11, a thin hoist having an axial dimension smaller than the outer diameter dimensions (dimensions in a direction perpendicular to the axial dimension) of the drive sheave 13 and the drive device body 10 is used.

Furthermore, the drive means 11 are arranged in such positions: is higher than the floor of the car 4 stopped at the lowermost landing floor and is lower than the ceiling of the car 4 stopped at the uppermost landing floor. Specifically, in the first embodiment, when the car 4 stops at the lowest landing, the drive device 11 is disposed so as to face the side surface 4a of the car 4. The drive device 11 is disposed horizontally to the rotation shaft of the drive sheave 13 and parallel (or substantially parallel) to the elevator door opening direction of the car 4.

The drive device 11 is disposed between the side surface 4a of the car 4 and the hoistway wall 1a on the vertical projection plane, and is disposed parallel to the hoistway wall 1a and the side surface 4 a. The drive device body 12 is disposed on the car 4 side, and the drive sheave 13 is disposed on the hoistway wall 1a side.

In addition, in a vertical projection, a part of the drive device 11 is disposed so as to protrude toward the car 4 side from the back surface of the car guide rail 2b, and the car guide rail 2b is located on the same side of the drive device 11 with respect to the car 4.

A plurality of main ropes 14 (only one of which is shown in fig. 2) for suspending the car 4 and the counterweight 5 are wound around the drive sheave 13.

An idler pulley 15 around which the main rope 14 is wound is provided near the drive device 11. In particular, the idler 15 is mounted on the side of the support member 8 opposite the hoistway wall 1a, which support member 8 is a common support member for the idler 15 and the drive means 11. By winding the main ropes 14 around the idle sheave 15, the contact angle at which the main ropes 14 are wound around the drive sheave 13 is increased to 230 to 280 degrees.

The rotation axis of the idle pulley 15 is parallel to the rotation axis of the drive sheave 13. Further, the diameter of the idle pulley 15 is smaller than that of the drive sheave 13. Also, on the vertical projection plane, the idle pulley 15 is arranged to coincide with the drive sheave 13.

An upper support beam 16 is disposed at an upper portion (ceiling portion) in the elevator shaft 1. The upper support beam 16 is fixed to the car guide rail 2b and the

counterweight guide rails

3a and 3 b.

A car-side deflector sheave 17 and a counterweight-side deflector sheave 18 are mounted on the upper support beam 16. The car-side return sheave 17 is disposed diagonally across the drive device main body 12 on a vertical projection plane. That is, a part of the car-side return sheave 17 overlaps the drive device 11 on a vertical projection plane. In addition, a counterweight-side return sheave 18 is disposed between the sheave 7 on which the counterweight is suspended and the drive sheave 13 on the vertical projection plane.

Further, a counterweight-side rope fastening portion 19 is provided on the upper support beam 16. A rope fixing beam 20 is fixed to an upper end portion of the car guide rail 3 a. And the rope fixing beam 20 is provided with a car-side rope fastening portion 21.

The main rope 14 has a first end portion 14a connected to the car-side rope fastening portion 21, and a second end portion 14b connected to the counterweight-side rope fastening portion 19. Further, the main ropes 14 are wound around the following sheaves in order from the first end 14 a: car hanging

rope wheels

6a and 6b, a car side return rope wheel 17, a driving rope wheel 13 and an idle wheel 15; a counterweight-side diverting pulley 18 and a pulley 7 for suspending a counterweight.

The car 4 and the counterweight 5 are suspended in the hoistway 1 by 2: 1 roping via the main sheave 14.

In fig. 2, the support member 8, the upper support beam 16, and the rope fixing beam 20 are not shown.

In such an elevator apparatus, since the contact angle at which the main ropes 14 are wound around the drive sheave 13 is increased by the idler sheave 15, the traction force can be increased while suppressing the increase in the diameter of the drive sheave. Thus, the drive device 11 can be miniaturized, the cost can be reduced, and the degree of freedom of the design layout can be improved.

Further, in order to secure a large traction force, for example, as shown in fig. 3, the width of the undercut groove 13b provided at the bottom of the rope groove 13a of the drive sheave 13 may be made narrower. Furthermore, the undercut grooves 13b can also be dispensed with if a sufficient drag force is obtained. Therefore, the contact area between the bottom surface of the rope groove 13a and the main rope 14 is increased, and the contact pressure between the main rope 14 and the drive sheave 13 can be reduced to the allowable value or less. Thus, the life of the main ropes 14 can be extended.

Further, since the contact angle of the main rope 14 wound around the drive sheave 13 is increased to 230 to 280 degrees by the idler pulley 15, an optimum traction force can be secured.

Also, since the position of the drive device 11 is disposed at a position higher than the floor of the car 4 when the car stops at the lowermost landing, the drive device 11 is prevented from being flooded even if the pit (bottom) of the hoistway 1 is flooded with water.

Further, since the drive device 11 and the idler pulley 15 are supported by the common bearing member 8, it is possible to make the position of the idler pulley 15 relative to the drive sheave 13 easy to adjust (center) while reducing the number of parts and simplifying the structure. Further, by increasing the contact angle, the tension of the main rope 14 acting on the drive sheave 13 and the idler sheave 15 can be absorbed in the support member 8, and the application of such a load to the counterweight guide rail 3a can be prevented.

Further, since the driving unit 11 is mounted below the support member 8 and the idle gear 15 is mounted on the side of the support member 8, the driving unit 11 and the idle gear 15 can be arranged compactly with high efficiency.

Further, since the support member 8 is fixed to the counterweight guide rail 3a by the vibration isolating members 10a and 10b, vibrations of the drive device 11 and the idler pulley 15 can be prevented from being transmitted to the building and the car 4 via the guide rail 3 a.

Further, the idler pulley 15 only changes the passage through which the main rope 14 passes, so the contact angle of the main rope 14 on the idler pulley 15 can be reduced. Therefore, the diameter of the idle pulley 15 can be smaller than the diameter of the drive sheave 13, so that an increase in cost can be suppressed by providing the idle pulley 15.

Alternatively, the idler gear and the drive device may be mounted on respective support members.

In the above embodiment, the idle pulley 15 is disposed between the drive sheave 13 and the counterweight-side return sheave 18. However, the idle pulley 15 may be disposed between the drive sheave 13 and the car-side return sheave 17. Two idle pulleys may be used, and the idle pulleys may be disposed between the drive sheave and the car-side return sheave and between the drive sheave and the counterweight-side return sheave.

In the above embodiment, the drive device 11 is disposed at a position higher than the floor of the car 4 when the car is stopped at the lowest stopping floor, but the drive device 11 may be disposed at a position higher than the floor when the car is stopped at one floor or a reference floor (hall floor).

Second embodiment

Next, fig. 4 is a perspective view of an elevator apparatus according to a second embodiment of the present invention; fig. 5 is a plan view of a main part of the elevator apparatus in fig. 4.

In both figures, when the counterweight 5 is at the same height position as the car 4, the counterweight 5 is disposed at a position facing the back surface 4b of the car 4 (the formula below behind the counterweight). On the vertical projection plane, the drive device 11 is arranged in parallel with the counterweight 5. That is, on the vertical projection plane, a part of the driving device 11 which is half or more is located between the back surface 4b of the car 4 and the hoistway wall 1b, and is arranged parallel to the hoistway wall 1b and the back surface 4 b.

The rotation axis of the drive sheave 13 of the drive device 11 is arranged parallel to the depth direction of the car 4.

The support member 8 is fixed to the car guide rail 2b and the counterweight guide rail 3 b. The idler pulley 15 is mounted on the side of the support member 8 opposite the hoistway wall 1 b.

The upper support beam 16 is fixed to the upper end portions of the car guide rail 2b and the counterweight guide rail 3 a. The support member 8 and the upper support beam 16 are substantially L-shaped.

The car-side deflector sheave 17 is mounted on the lower portion of the upper support beam 16. The rotation axis of the car-side return sheave 17 is arranged parallel (or substantially parallel) to the width direction of the car 4. The car-side return sheave 17 crosses the drive device 11 at almost right angles on a vertical projection plane. The other structure is substantially the same as that of the first embodiment.

With this configuration, the drive device 11 can be downsized and the degree of freedom of layout design can be improved. In addition, the life of the main ropes 14 can be extended.

Third embodiment

Next, fig. 6 is a perspective view of an elevator apparatus according to a third embodiment of the present invention; fig. 7 is a plan view of a main part of the elevator apparatus in fig. 6. In embodiment 3, the counterweight 5 faces the back surface 4b of the car 4 and the drive device 11 faces the side surface 4a of the car 4 on the vertical projection plane.

The drive device 11 is disposed between the side surface 4a of the car 4 and the drive device main body 12 so as to be parallel or substantially parallel to the side surface 4a on the vertical projection plane. The drive sheave 13 is disposed on the car 4 side, and the drive device body 12 is disposed on the hoistway wall 1a side.

The drive device 11 is disposed between the car guide rail 2b and the counterweight guide rail 3b, and a part of the drive device 11 is disposed so as to protrude toward the car 4 side from the back surface of the car guide rail 2b, and the car guide rail 2b is located on the same side as the drive device 11 with respect to the car 4.

The upper support beam 16 is fixed to the upper end portions of the car guide rail 2b and the

counterweight guide rails

3a, 3 b. The car-side deflector sheave 17 is mounted on the lower portion of the upper support beam 16. The car-side deflector sheave 17 is disposed between the side surface 4a of the car 4 and the drive machine main body 12 on a vertical projection plane, and is parallel or substantially parallel to the side surface 4 a.

The counterweight-side deflector sheave 18 is mounted below the upper support beam 16. In addition, the counterweight-side return sheave 18 is disposed outside the range of the car 4 on the vertical projection plane, and does not overlap the car 41.

With this configuration, the size of the drive device 11 can be reduced, and the degree of freedom in layout design can be improved. In addition, the life of the main ropes 14 can be extended.

Further, since the drive device 11 and the counterweight 5 face different sides of the car 4, the width dimension of the counterweight 5 can be increased and the thickness dimension thereof can be reduced, and at the same time, the drive device 11 can be disposed in the space between the car rail 2b and the counterweight rail 3b, so that the space in the hoistway 1 can be effectively utilized and the planar dimension of the hoistway 1 can be reduced.

Fourth embodiment

Next, fig. 8 is a perspective view of an elevator apparatus according to a fourth embodiment of the present invention. In embodiment 4, the support member 8 to which the drive device 11 and the idler pulley 15 are attached is disposed at an upper portion in the hoistway 1. Further, a car-side diverting sheave 17 and a counterweight-side diverting sheave 18 are mounted on the upper portion of the support member 8. That is, the support member 8 also serves as an upper support beam.

The drive device 11 is disposed at a position higher than the floor of the car 4 when stopped at the highest floor and lower than the ceiling. That is, when the car 4 stops at the highest landing, the drive device 11 faces the side surface 4a of the car 4.

The drive device body 12 is disposed on the car 4 side, and the drive sheave 13 is disposed on the hoistway wall 1a side. Idler pulley 15 is mounted on the side of support member 8 facing hoistway wall 1 a.

The counterweight-side rope fastening portion 19 is provided on a rope-fixing beam 22 fixed to the upper end portion of the car guide rail 3 a. The other structure is the same as that of the third embodiment.

With this configuration, since the car-side return sheave 17, the counterweight-side return sheave 18, the drive device 11, and the idle sheave 15 are all mounted on the common support member 8, the positions (centering) of the car-side return sheave 17, the counterweight-side return sheave 18, the drive sheave 13, and the idle sheave 15 can be easily adjusted. In addition, the number of parts can be reduced.

Fifth embodiment

Fig. 9 is a perspective view of an elevator apparatus according to a fifth embodiment of the present invention; fig. 10 is a plan view of a main part of the elevator apparatus of fig. 9. In the figure, when the counterweight 5 is at the same height as the car 4, the counterweight 5 is disposed so as to face the side surface 4a of the car 4.

The support member 8 on which the drive device 11 and the idler pulley 15 are mounted is disposed at the top in the hoistway. The support member 8 is fixed to the upper end portions of the car guide rail 2b and the

counterweight guide rails

3a and 3b by a vibration isolating member (not shown).

The drive means 11 is mounted on the upper part of the support member 8. In addition, the drive device 11 is disposed so that a part thereof overlaps the car 4 on a vertical projection plane. Specifically, the drive device main body 12 is disposed so that a part thereof overlaps the car 4 on a vertical projection plane, and the drive sheave 13 is disposed outside the range of the car 4.

Further, the drive device 11 and the support member 8 are disposed at such a height that interference with the car 4 can be avoided even if the car 4 protrudes upward when the counterweight 5 moves to the lowermost moving position of the hoistway 1.

The main ropes 14 extend downward from the drive sheave 13 and the idler sheave 15. That is, the main ropes 14 extend from the drive sheave 13 and the idle sheave 15 to the car hanging sheave 6b and the counterweight hanging sheave 7 without passing through the return sheave.

With this configuration, the drive device 11 can be downsized, and the degree of freedom in layout design can be improved. In addition, the life of the main ropes 14 can be extended.

In addition, the diversion sheave is omitted, so that the number of parts is reduced, and the cost can be reduced.

The direction of the drive device 11 may be reversed from that in fig. 10, and the drive device 11 may be disposed between the side surface 4a of the car 4 and the hoistway wall 1a on a vertical projection plane.

Sixth embodiment

Next, fig. 11 is a perspective view of an elevator apparatus according to a sixth embodiment of the present invention; fig. 12 is a plan view of a main portion of the elevator apparatus in fig. 11.

In the figure, when the counterweight 5 is at the same height as the car 4, the counterweight 5 is disposed so as to face the back surface 4b of the car 4.

A support member 8 is disposed at the ceiling portion in the elevator shaft 1. The support member 8 is fixed to the upper end portions of the car guide rail 2b and the

counterweight guide rails

3a and 3b by a vibration-proof member (not shown).

The drive means 11 is arranged above the support member 8. In addition, the drive device 11 is disposed so that a part thereof overlaps the car 4 on a vertical projection plane. The idler gear 15 is attached to a frame of the drive device main body 12.

A guide pulley 23 is provided on the upper part of the support member 8, and the guide pulley 23 is used to guide the main ropes 14 from the idle pulley 15 to the sheave 7 on which the counterweight is suspended. On the vertical projection plane, the guide wheels 23 are partially disposed directly above the counterweight 5 so as to overlap the counterweight 5.

The support member 8 is provided with a plurality of main rope passage holes 8a and 8b through which the main ropes 14 pass.

Further, since the guide wheels 23 are used, the degree of freedom in layout design of the counterweight 5 can be improved.

In the above embodiment, the vibration preventing member is provided between the support member and the guide rail, but the vibration preventing member may be provided between the drive unit and the idler pulley and the support member.

The support member, the upper support beam, the rope fixing beam, and the like may be fixed directly or indirectly to the building, instead of being fixed to the guide rail.

Claims

1. An elevator device comprising:

A driving device, which is arranged in the hoistway and has a driving sheave;

the main rope wound on said drive sheave; and,

The car and the counterweight are suspended in the above-mentioned hoistway by the above-mentioned main rope, and are driven by the driving force of the above-mentioned driving device to go up and down; wherein,

The rotation shaft of the above-mentioned driving sheave of the above-mentioned driving device is arranged horizontally;

An idler wheel wound around the above-mentioned main rope is arranged near the above-mentioned driving device;

By winding the main rope around the idler pulley, the contact angle of the main rope wound around the drive sheave is increased.

2. The elevator apparatus according to claim 1, wherein the contact angle of the main rope wound around the driving sheave is 230 to 280 degrees.

3. The elevator apparatus according to claim 1, wherein when the car stops at the lowest parking floor, the driving device is arranged at a position higher than the floor of the car; At the time of the uppermost parking floor, the said drive device is arrange|positioned at the position lower than the ceiling of the said car.

4. The elevator apparatus according to claim 1, wherein said driving device is arranged on the top of said hoistway.

5. The elevator device according to claim 1, wherein a plurality of guide rails for guiding the car and the counterweight are provided in the hoistway; at least one of the driving device and the idler wheel is formed by Supported by a support member installed on at least a part of the above-mentioned guide rails.

6. The elevator apparatus according to claim 1, wherein the driving device and the idler pulley are mounted on a common support member fixed in the hoistway.

7. The elevator apparatus according to claim 6, wherein the supporting member is fixed in the hoistway by a vibration-proof member.

8. The elevator apparatus according to claim 6, wherein said driving device is attached to the lower surface of said support member, and said idler pulley is attached to a side surface of said support member.

9. The elevator apparatus according to claim 1, wherein the idler pulley is attached to a frame of the drive device.

10. The elevator apparatus according to claim 1, wherein the diameter of the idler pulley is smaller than the diameter of the driving sheave.