JPWO2006021996A1 - Elevator equipment - Google Patents

Abstract

In the elevator apparatus, a car and a counterweight are suspended in a hoistway by a suspension rope. A drive rope is wound around the drive sheave of the drive device. The drive rope is connected to the counterweight. The drive rope is given tension by a tension generator. The car is raised and lowered by transmitting the driving force of the driving device to the counterweight via the drive rope and raising and lowering the counterweight.

Description

  The present invention relates to an elevator apparatus in which a car and a counterweight are moved up and down in a hoistway.

  In a conventional elevator apparatus, a car and a counterweight are suspended in a hoistway by a rope. The counterweight is equipped with a linear motor armature. In the hoistway, the secondary conductor of the linear motor is arranged along the raising / lowering direction of the counterweight. The car and the counterweight are lifted and lowered in the hoistway by the driving force of the linear motor (see, for example, Patent Document 1).

JP 2003-40555 A

  However, since the conventional elevator apparatus as described above uses a linear motor as a drive source, the cost is considerably increased. Moreover, since the secondary conductor is installed in almost the entire length of the hoistway, maintenance is difficult.

  The present invention has been made to solve the above-described problems, and can suppress the increase in cost, facilitate maintenance, and reduce the vibration of the driving device transmitted to the car. It aims at obtaining the elevator apparatus which can be performed.

  An elevator apparatus according to the present invention includes a car that is raised and lowered in a hoistway and a counterweight, a suspension rope that suspends the car and the counterweight in the hoistway, a drive device main body, and a drive sheave that is rotated by the drive device main body. A drive rope that is wound around the drive sheave and connected to the counterweight, and a tension generator for adjusting the tension of the drive rope. The car is raised and lowered by transmitting the driving force to the counterweight and raising and lowering the counterweight.

1 is a perspective view showing an elevator apparatus according to Embodiment 1 of the present invention. It is a side view which shows the elevator apparatus of FIG. It is a top view which shows the elevator apparatus of FIG. It is sectional drawing of the tension generator of FIG. It is a front view which shows the relationship between the counterweight of the elevator apparatus by Embodiment 2 of this invention, and a drive device. It is a schematic block diagram which shows the elevator apparatus by Embodiment 3 of this invention. It is a schematic block diagram which shows the elevator apparatus by Embodiment 4 of this invention. It is a block diagram which shows the tension generator of the elevator apparatus by Embodiment 5 of this invention. It is a block diagram which shows the tension generator of the elevator apparatus by Embodiment 6 of this invention. It is a block diagram which shows the tension generator of the elevator apparatus by Embodiment 7 of this invention. It is a block diagram which shows the tension generator of the elevator apparatus by Embodiment 8 of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a perspective view showing an elevator apparatus according to Embodiment 1 of the present invention, FIG. 2 is a side view showing the elevator apparatus of FIG. 1, and FIG. 3 is a plan view showing the elevator apparatus of FIG.

  In the figure, in the hoistway 1, a pair of car guide rails 2a, 2b and a pair of counterweight guide rails 3a, 3b are installed. In FIG. 1, only the lower part of the guide rails 2a, 2b, 3a, 3b is shown, and in FIG. 2, the guide rails 2a, 2b, 3a, 3b are omitted.

  The car 4 is moved up and down in the hoistway 1 by being guided by the car guide rails 2a and 2b. The counterweight 5 is raised and lowered in the hoistway 1 while being guided by the counterweight guide rails 3a and 3b. On the front surface of the car 4, a pair of car doors 6a and 6b for opening and closing the car doorway are provided. The counterweight 5 is disposed behind the car 4 so as to face the back surface of the car 4 when positioned at the same height as the car 4.

  First to fourth car return wheels 7 a to 7 d are provided in the upper part of the hoistway 1. The car return wheels 7 a to 7 d are arranged such that their rotation shafts are parallel and horizontal to the width direction of the car 4. The car return wheels 7 a to 7 d are arranged outside the area of the car 4 so as to face the side surface of the car 4 in the vertical projection plane. That is, the car 4 does not interfere with the car return wheels 7 a to 7 d even if it moves to the top of the hoistway 1.

  A first suspension rope 8 is wound around the first and second car return wheels 7a and 7b. The first suspension rope 8 includes a first end 8 a connected to one end in the width direction of the upper part (upper beam) of the car 4 and a second end connected to one end in the width direction of the upper part of the counterweight 5. Part 8b. A second suspension rope 9 is wound around the third and fourth car return wheels 7c and 7d. The second suspension rope 9 has a third end 9 a connected to the other end in the width direction of the upper part (upper beam) of the car 4 and a second end connected to the other end in the width direction of the upper part of the counterweight 5. And four end portions 9b.

  The car 4 and the counterweight 5 are suspended in the hoistway 1 by the 1: 1 roping method by the first and second suspension ropes 8 and 9. At the lower part (bottom part) of the hoistway 1, a pair of car shock absorbers 10a and 10b and a pair of counterweight shock absorbers 11a and 11b are installed.

  In addition, a driving device 12 that generates a driving force for raising and lowering the car 4 and the counterweight 5 is installed below the hoistway 1. The drive device 12 includes a drive device main body 13 including a motor and a brake, and a drive sheave 14 rotated by the drive device main body 13. The drive device 12 is arranged so that the rotation shaft of the drive sheave 14 is parallel and horizontal to the depth direction of the car 4. Further, the driving device 12 is disposed directly below the counterweight 5 so as to overlap the counterweight 5 in the vertical projection plane. Further, as the driving device 12, a thin hoisting machine in which the outer dimension in the axial direction of the drive sheave 14 is shorter than the outer dimension in the radial direction of the driving sheave 14 is used.

  A drive rope return wheel 15 is disposed in the upper part of the hoistway 1. The drive rope return wheel 15 is arranged so that its rotational axis is parallel to the drive sheave 14. Further, the drive rope return wheel 15 is arranged directly above the counterweight 5 so as to overlap the counterweight 5 in the vertical projection plane. Further, the drive rope return wheel 15 and the drive device 12 are arranged outside the area of the car 4 so as not to overlap the car 4 in the vertical projection plane.

  A plurality of drive ropes 16 (only one is shown in FIGS. 2 and 3) are wound between the drive sheave 14 and the drive rope return wheel 15. The drive rope 16 is connected to the counterweight 5 on one side of the drive sheave 14, and transmits the driving force of the drive device 12 to the counterweight 5. The counterweight 5 is provided with a notch 5 a for avoiding interference with the other side portion of the drive sheave 14 of the drive rope 16.

  The counterweight 5 is equipped with a tension generator 17 that applies tension to the drive rope 16. By applying tension to the drive rope 16 by the tension generator 17, a frictional force (traction force) between the drive sheave 14 and the drive rope 16 is ensured.

  4 is a cross-sectional view of the tension generator 17 of FIG. The tension generator 17 is attached to the rope end connection portion 5 b of the counterweight 5. One end portion of the drive rope 16 is connected to the rope end connection portion 5b. In addition, the tension generator 17 includes an expandable / contractible multiple tube portion (expandable portion) 18, a plurality of coil springs 19 a to 19 c that are elastic members disposed in the multiple tube portion 18, and the center of the multiple tube portion 18. And an inserted rope end connecting rod 20.

  The multiple tube portion 18 has a triple tube structure including first to third cylindrical portions 18a to 18c having different diameters. The lower end portion of the first cylindrical portion 18a is fixed to the rope end connecting portion 5b. The other end of the drive rope 16 is connected to the rope end connecting rod 20.

  The coil spring 19a is disposed between the first cylindrical portion 18a and the second cylindrical portion 18b. The coil spring 19b is disposed between the second cylindrical portion 18b and the third cylindrical portion 18c. The coil spring 19 c is disposed between the third cylindrical portion 18 c and the rope end connecting rod 20. That is, the coil springs 19a to 19c are arranged in a multistage manner. Further, the spring force of the coil springs 19a to 19c acts in the direction of shortening the overall length of the multiple tube portion 18 and pulling the drive rope 16.

  In such an elevator apparatus, the driving force of the driving device 12 is transmitted to the counterweight 5 via the driving rope 16, whereby the car 4 and the counterweight 5 are raised and lowered. Therefore, the vibration of the drive device 12 transmitted to the car 4 can be greatly reduced, the vibration-proofing measures for the car 4 can be reduced, and the riding comfort can be improved. Moreover, compared with the case where a linear motor is mounted on the counterweight 5, it is possible to suppress an increase in cost and facilitate maintenance.

In addition, since the tension generator 17 having the coil springs 19a to 19c for applying tension to the drive rope 16 by elastic force is used, maintenance can be simplified and tension can be generated with a simple structure.
Furthermore, since the coil springs 19a to 19c are arranged in a multistage manner, it is possible to reduce a change in tension with respect to a change in length. Specifically, the change in tension with respect to the change in length can be suppressed to a range within 5% of the total stroke length.

Furthermore, since the tension generator 17 is mounted on the counterweight 5, the counterweight 5 can be reduced in weight by the weight of the tension generator 17.
Further, since the car return wheels 7a to 7d are arranged outside the area of the car 4 in the vertical projection plane, the overhead dimension can be reduced and the vertical dimension of the entire hoistway 1 can be reduced.
Furthermore, since the drive device 12 is disposed so as to overlap with the counterweight 5 in the vertical projection plane, the plane size of the hoistway 1 can be reduced.

Furthermore, since the car 4 is suspended by the two suspension ropes 8 and 9 at both ends in the width direction, the car 4 can be suspended in a well-balanced manner, and the raising and lowering of the car 4 can be stabilized.
In addition, since the drive device 12 is installed in the lower part of the hoistway 1, maintenance and inspection for the drive device 12 is easy.

Embodiment 2. FIG.
Next, FIG. 5 is a front view showing the relationship between the counterweight and the drive device of the elevator apparatus according to Embodiment 2 of the present invention. The counterweight 21 has first and second weight portions 22 and 23 distributed on both sides in the width direction, and a connecting portion 24 that connects the first weight portion 22 and the second weight portion 23. is doing. The tension generator 17 is attached to the connecting portion 24.

  The first weight portion 22 and the second weight portion 23 are spaced apart from each other in the width direction and have the same weight. The counterweight 21 accommodates the drive device 12 when the counterweight 21 is lowered to the lowest movement position in the hoistway 1 (the position where the counterweight buffers 11a and 11b in FIG. 1 are compressed). A first recess 21a is provided. In other words, even if the counterweight 21 is lowered to the lowest movement position, the counterweight 21 does not interfere with the driving device 12.

  Further, the counterweight 21 is provided with a second recess 21b in which the drive rope return wheel 15 is accommodated when the counterweight 21 is raised to the uppermost moving position in the hoistway 1. That is, even if the counterweight 21 rises to the uppermost movement position, the counterweight 21 does not interfere with the drive rope return wheel 15. In other words, the counterweight 21 is divided into first and second weight portions 22 and 23 to form the first and second recesses 21a and 21b. Other configurations are the same as those in the first embodiment.

  By using such a counterweight 21, the vertical dimension of the hoistway 1 can be further reduced. Moreover, the planar dimension of the hoistway 1 can be reduced by arranging the drive device 12 and the drive rope return wheel 15 so as to overlap the counterweight 21 in the vertical projection plane.

Embodiment 3 FIG.
Next, FIG. 6 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 3 of the present invention. In the figure, both ends of the drive rope 16 are connected to a counterweight 31. The drive device 12 is supported by the base 33 via the tension generator 32. The tension generator 32 adjusts the tension of the drive rope 16 by displacing the entire drive device 12 including the drive sheave 14 in the vertical direction. Other configurations are the same as those in the first embodiment.

  Thus, the tension generating device 32 may be provided in the driving device 12 without being mounted on the counterweight 31, and tension can be applied to the driving rope 16.

Embodiment 4 FIG.
Next, FIG. 7 is a schematic configuration diagram showing an elevator apparatus according to Embodiment 4 of the present invention. In the figure, both ends of the drive rope 16 are connected to a counterweight 31. The tension generator 34 is interposed between the drive rope return wheel 15 and its support portion, and adjusts the tension of the drive rope 16 by displacing the drive rope return wheel 15 in the vertical direction. . Other configurations are the same as those in the first embodiment.

  Thus, the tension generator 34 may be provided in the drive rope return wheel 15 without being mounted on the counterweight 31, and tension can be applied to the drive rope 16.

Embodiment 5 FIG.
Next, FIG. 8 is a block diagram showing a tension generator of an elevator apparatus according to Embodiment 5 of the present invention. In this example, a tension generator having a spring 35 that is an elastic member is used. The spring 35 applies an upward force to the center of the drive rope return wheel 15 by its elastic force (restoring force), thereby applying tension to the drive rope 16.

  By using such a spring 35, the structure of the tension generator can be simplified, and the tension generator can be made inexpensive.

Embodiment 6 FIG.
Next, FIG. 9 is a block diagram showing a tension generator of an elevator apparatus according to Embodiment 6 of the present invention. In this example, a tension generator having a rubber member 36 that is an elastic member is used. The rubber member 36 applies tension to the center of the drive rope return wheel 15 by its elastic force (restoring force), thereby applying tension to the drive rope 16.

  Also by using such a rubber member 36, the structure of the tension generator can be simplified, and the tension generator can be made inexpensive.

Embodiment 7 FIG.
Next, FIG. 10 is a block diagram showing a tension generator of an elevator apparatus according to Embodiment 7 of the present invention. In this example, a tension generator having an actuator 37 is used. The actuator 37 applies an upward force to the center of the drive rope return wheel 15 by the drive force, thereby applying tension to the drive rope 16. Further, the actuator 37 can keep the tension of the drive rope 16 constant over the entire stroke. Further, the actuator 37 can be adjusted by changing the tension applied to the drive rope 16.

  As the actuator 37, for example, a hydraulic cylinder, an air cylinder, or an electromagnetic actuator having an electromagnetic coil can be used.

  By using such an actuator 37, the tension can be kept constant according to the expansion and contraction of the drive rope 16, and the traction force between the drive sheave 14 and the drive rope 16 can be stably secured. In addition, it is possible to control the actuator 37 so as to absorb vibrations and torque ripples of the drive rope 16 and to improve riding comfort.

Embodiment 8 FIG.
Next, FIG. 11 is a block diagram showing a tension generator of an elevator apparatus according to Embodiment 8 of the present invention. In this example, a tension generator having a spring 38 as an elastic member and an actuator 39 is used. The spring 38 applies tension to the drive rope 16 by its elastic force (restoring force). The actuator 39 applies tension to the drive rope 16 by its driving force.

  As described above, in the tension generator combined with the spring 38 and the actuator 39, the tension change in the short period of the drive rope 16 is handled by the spring 38, and the secular change in the tension of the drive rope 16 is handled by the actuator 39. can do. Therefore, the tension of the drive rope 16 can be further stabilized.

In addition, the tension generator shown in Embodiments 5 to 8 can be applied to a tension generator mounted on a counterweight and a tension generator provided in a driving device.
In the above example, the counterweight is placed behind the car, but the counterweight is on the side of the car so that it faces the side of the car when it is at the same height as the car. You may arrange.

Furthermore, in the above example, the drive device is arranged so that the rotational axis of the drive sheave is parallel to the depth direction of the car. However, the drive device is arranged so that the rotational axis of the drive sheave is oblique to the depth direction of the car. Or may be arranged parallel to the width direction of the car.
Furthermore, in the above example, the drive device is arranged so that the rotation axis of the drive sheave is horizontal, but the drive device may be arranged so that the rotation axis of the drive sheave is vertical or almost vertical.

In the above example, the thin hoisting machine is used as the driving device. However, a driving device of a type in which the outer dimension in the axial direction is larger than the outer dimension in the direction perpendicular to the axial direction may be used.
Furthermore, in the above example, the drive device is installed in the lower part in the hoistway, but it may be installed in the upper part in the hoistway or in the machine room, so that countermeasures against flooding can be reduced.

  Furthermore, in the above example, the tension generating device is counterbalanced and provided in the drive device or the drive rope return wheel. However, the present invention is not limited thereto. For example, in addition to the drive sheave and the drive rope return wheel, a drive rope is provided. A tension pulley to be wound around may be added, and tension may be applied to the drive rope through the tension pulley.

Further, the number of drive ropes may be any number as necessary.
Furthermore, as a hanging rope or a driving rope, for example, a steel rope or a highly flexible rope can be used. Examples of the highly flexible rope include a resin-coated rope in which an outer layer covering made of a high friction resin material is provided on the outer peripheral portion. By using a highly flexible rope, a large traction force can be secured with a small winding angle. Moreover, since a highly flexible rope can raise a softness | flexibility rather than a mere steel rope, it can make the diameter of a drive sheave small.
In addition to the rope having a circular cross section, a belt-like rope can be used as the hanging rope and the driving rope.
Different types of rope may be used for the suspension rope and the drive rope.

Claims (13)

Cages and counterweights that are raised and lowered in the hoistway,
A suspension rope for suspending the car and the counterweight in the hoistway;
A drive device having a drive device body and a drive sheave rotated by the drive device body;
A drive rope that is wound around the drive sheave and connected to the counterweight, and a tension generator that applies tension to the drive rope, the drive force of the drive device being provided via the drive rope An elevator apparatus in which the car is moved up and down by transmitting to the counterweight and moving the counterweight up and down.   The elevator apparatus according to claim 1, wherein the tension generator includes an elastic member that applies tension to the drive rope by an elastic force.   The elevator apparatus according to claim 2, wherein the elastic member includes a plurality of springs arranged in a multistage manner.   The elevator apparatus according to claim 1, wherein the tension generator includes an actuator that applies tension to the drive rope by a driving force.   The tension generator includes an elastic member that applies tension to the driving rope by an elastic force, and an actuator that applies tension to the driving rope by a driving force. The elevator apparatus according to claim 1, which corresponds by a member and corresponds to a secular change in tension of the drive rope by the actuator.   The elevator apparatus according to claim 1, wherein the tension generator is mounted on the counterweight.   The elevator apparatus according to claim 1, wherein the tension generator adjusts the tension of the drive rope by displacing the drive sheave. The drive rope is wound between the drive sheave and the drive rope return wheel,
2. The elevator apparatus according to claim 1, wherein the tension generator adjusts the tension of the drive rope by displacing the drive rope return wheel.   A plurality of basket return cars around which the suspension rope is wound are arranged at the upper part of the hoistway, and the basket return cars are arranged outside the area of the car in the vertical projection plane. The elevator apparatus according to 1.   The elevator apparatus according to claim 1, wherein the driving device is disposed so as to overlap the counterweight within a vertical projection plane. The driving device is disposed in either one of the lower part and the upper part in the hoistway,
The elevator apparatus according to claim 10, wherein the counterweight is provided with a recess in which the driving device is accommodated when the counterweight moves to one of the lowest movement position and the highest movement position in the hoistway. A drive rope return wheel around which the drive rope is wound is disposed on either the lower part or the upper part in the hoistway,
The elevator apparatus according to claim 1, wherein the drive rope return wheel is arranged so as to overlap the counterweight in a vertical projection plane. The elevator according to claim 12, wherein the counterweight is provided with a recess in which the drive rope return wheel is accommodated when the counterweight moves to either the lowest movement position or the highest movement position in the hoistway. apparatus.

Images