JP2001026388A - Self-propelled elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a total height of a building and to reduce a plane space of a hoistway by installing a driving device for driving a traction sheave on a lower part of a car, and positioning at least a part of the traction sheave outside of a horizontal plane of projection of the car. SOLUTION: A driving device 5 for driving a traction sheave 5a is installed on a lower part of a car 1, a rotary shaft of the traction sheave 5a is placed vertially to a car side surface at an opposite side of an entrance, and the traction sheave 5a is totally positioned outside of a horizontal plane of projection of the whole car 1. Two deflector wheels 12a, 12b having rotary shafts in parallel to the rotary shaft of the traction sheave 5a are mounted in a space between a side wall surface at an opposite side opposite of the entrance of the car 1 and a wall surface of the hoistway opposite to the side wall surface, near the traction sheave 5a, and a hoist rope 6 is wrapped on the same to increase a winding angle to the traction sheave 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called self-propelled elevator apparatus in which an elevator car is provided with a driving device.

[0002]

2. Description of the Related Art A general rope-type elevator requires a machine room for installing a drive unit at the top of a hoistway, which not only increases the overall height of the building and increases the cost of the building but also increases the sunshine. It was also a big problem in terms of authority. In order to solve this problem, a so-called self-propelled elevator in which a car is provided with a drive device to eliminate a machine room has been proposed.

FIG. 6 is a view showing a conventional self-propelled elevator disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 63-133570. In this elevator, a driving device 5 for driving a traction sheave is provided on a car, and a car 1 and a counterweight 3 are reversed in a hoisting manner at the top of the hoistway without providing a machine room above the hoistway. The height of the building is reduced only by providing the return wheel 8 to be flipped.

[0004]

As described above, in the conventional self-propelled elevator, the height from the car floor to the top of the car is high because the driving device is provided on the top of the car.
The effect of lowering the overall height of the building by eliminating the machine room is partially offset. In addition, when a drive device is placed on the car, when elevators are maintained, the maintenance staff has a poor foothold.In addition, a rescue exit is provided on the ceiling for the purpose of rescuing passengers in the event of an elevator emergency. There was a problem that securing was difficult. Next, in the case of a self-propelled elevator equipped with a driving device in a car, the tension ratio on both sides of the rope wound around the traction sheave is larger than that of a conventional non-self-propelled traction elevator, so that it is stable. In order to realize traveling, there is a problem that it is necessary to secure the so-called traction capability, which ensures that the hoisting rope transmits the driving force from the traction sheave to the hoisting rope without slipping in the rope groove of the traction sheave. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a self-propelled elevator equipped with a car driving device, the height of a building is reduced, the plane space of a hoistway is reduced, and maintenance is performed. Work and emergency rescue work are not hindered. In addition, by ensuring sufficient traction capacity, the car can run stably. Further, the moment generated in the car by the tension of the hoisting rope is reduced, and the durability of the hoisting rope is improved.

[0006]

According to a first aspect of the present invention, there is provided a self-propelled elevator apparatus having a driving device for driving a traction sheave disposed below a car, and partially or entirely projecting the traction sheave. It is arranged so as to be located outside the surface, the overall height of the building is reduced, the plane space of the hoistway is reduced, and there is no obstacle to maintenance work and emergency rescue work.

Further, in the self-propelled elevator device according to the second configuration of the present invention, the traction sheave is arranged at the center of the side of the car where there is no entrance, and the moment generated in the car by the tension of the hoisting rope is reduced. Things.

The self-propelled elevator device according to the third configuration of the present invention is configured such that at least one or more deflected vehicles are positioned near the traction sheave so that the winding angle of the hoisting rope around the traction sheave is 180 ° or more. To improve traction capacity.

In a self-propelled elevator device according to a fourth configuration of the present invention, at least one of a traction sheave and a deflector car is made of a resin in contact with a hoist rope to improve traction capability. In addition, the service life of the hoisting rope is extended.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a schematic diagram illustrating the components of the self-propelled elevator, ignoring the positional relationship between the car and the counterweight, FIG. 2 is a side view of the entire self-propelled elevator, and FIG. 3 is a horizontal plane of FIG. It is a projection view. In the figure, 1 is a car, 2 is a guide rail for guiding the car, and is composed of two rails 2a and 2b. 3 is a counterweight and 4 is a guide rail that guides the counterweight 2
It is composed of two rails 4a and 4b. Reference numeral 5 denotes a drive unit mounted on the lower part of the car 1 and has a traction sheave 5
a, a motor 5b, and a brake / reduction gear 5c. Reference numeral 6 denotes a hoisting rope fixed at both ends to the upper part of the hoistway and wound around a traction sheave, a return car, and a suspension car.
The car 1 is moved up and down by the traction sheave 5 a winding the hoisting rope 6. Reference numeral 7 denotes a suspension wheel provided on the counterweight. Numeral 8 denotes a return car mounted on the upper part of the hoistway via the mounting member 9, which raises and lowers the car and the counterweight in a hanging manner. Reference numeral 10 denotes a hoistway, and 11 denotes a guide roller provided on the car, which is composed of an upper guide roller 11a and a lower guide roller 11b, and is provided in a plane perpendicular to the plane formed by the rails 2a and 2b by the tension of the hoisting rope. Rolls on the guide rail 2 while supporting the rotating moment. 12a and 12b are traction sheaves 5a
Is a deflecting vehicle provided in the vicinity of.

In the self-propelled elevator constructed as described above, the drive unit is disposed at the lower part of the car, and the traction sheave is rotated at a vertical axis with respect to the side of the car opposite to the entrance. It is arranged so that the whole is located outside the horizontal projection plane of all cars. As a result, the size of the upper part of the car can be made smaller than that of a conventional self-propelled elevator in which the driving device is arranged on the car, so that the total height of the building can be made lower. Further, since the driving device is not disposed on the car, a work platform for maintenance personnel is secured during maintenance, and a space for a rescue exit for rescuing emergency passengers is also secured.

In a traction elevator, a car is driven by a frictional force between a hoisting rope and a traction sheave. In a self-propelled elevator, the tension of a rope wound around the traction sheave is higher than in a non-self-propelled elevator. Therefore, securing a stable frictional force, that is, improving the traction capability, is an important issue in realizing stable operation of the elevator. In the present embodiment, in the vicinity of the traction sheave,
Two deflecting wheels 12a and 12b having a rotation axis parallel to the rotation axis of the traction sheave are arranged in the space between the side wall surface opposite to the car entrance and the hoistway wall surface on the horizontal surface of the shaft. Then, a hoisting rope is wrapped around the traction sheave to increase the angle at which the hoisting rope wraps around the traction sheave to improve traction performance.

Further, as shown in FIG. 3, since the traction sheave is arranged at the center of the side of the car on the horizontal projection plane of the hoistway, the car is moved in a plane perpendicular to the traction sheave axis by the tension of the hoisting rope. The moment to rotate is reduced, and the load on the rail can be reduced.

In addition to the present embodiment, other means for improving the traction capability include a V-shaped rope groove of the traction sheave, a so-called undercut shape in which the groove bottom is removed, and a special winding. Rope lubricating oil may be employed, and these traction capability improving techniques may be applied to the present invention. If these means can provide sufficient traction capacity for stable running of the elevator, a self-propelled elevator that can stably run with a simple configuration, because a warped car is unnecessary and the ropes need only be wound around the traction sheave. Can be realized.

The traction sheave and the deflecting wheel are arranged so as to be located outside the horizontal projection plane of the car, but have a minimum size such that the hoisting rope does not come into contact with the car due to the swinging and vibration of the hoisting rope. Traction sheave,
The deflected car is moved closer to the car to reduce the plane space of the hoistway. Furthermore, since the traction sheave and the deflector are located between the car and the hoistway, the size of the lower part of the car can be reduced, reducing the size of the pits and providing space for the pits for maintenance work. This has the effect of making it easier to do.

Embodiment 2 FIG. 4 is an overhead view of the self-propelled elevator. In the drawing, a driving device 5 is arranged at a lower part of a car, and a traction sheave 5a is arranged so as to partially project from a horizontal projection plane of the car. Deflector 13
Are provided at positions symmetrical to the traction sheave with respect to the center line of the car parallel to the rotation axis of the traction sheave 5a on the horizontal projection plane of the hoistway. The hoisting rope 6, which descends vertically from the hoistway top, is first wound 90-degree around the traction sheave, facing the deflector car and wound 180-degree around the deflecting car, again wound 180-degree around the traction sheave, and then diverted to the traction sheave. Is wound 90- and heads back to car 8. Therefore, the hoisting rope is wound twice around the traction sheave, and the wrapping angle between the traction sheave and the hoisting rope is 270 °, and the traction capability is improved. Also, the traction sheave 5a and the deflector 13
The hoisting rope is projected from the horizontal projection plane of the car to the outside by a minimum dimension such that the hoisting rope does not come into contact with the car due to swinging and vibration of the hoisting rope, thereby reducing the space of the hoistway.

In the present embodiment, the traction sheave and the deflector are positioned symmetrically with respect to the center line of the car in order to reduce the moment of rotation generated in the car in a plane perpendicular to the rotation axis of the traction sheave. However, the ropes can be wound around each other even if they are not necessarily line-symmetric, and the hoisting ropes do not come into contact with the traction sheave and the warp wheel due to the swinging and vibration of the hoisting ropes. Elevator driving will not be hindered if it is located at a position protruding outside from the horizontal projection plane of the car by the size.

Further, as described in the first embodiment,
Make the traction sheave rope groove V-shaped,
Take measures such as adopting a so-called undercut shape with the bottom of the groove removed, or adopting a special hoisting rope lubricating oil. If sufficient traction capability can be secured, the hoisting rope is wound twice on the traction sheave. Elevator driving is possible without it.

Embodiment 3 FIG. 5 is an overhead view of the self-propelled elevator. In the figure, a driving device 5 is arranged at the lower part of the car, and the traction sheave 5a is arranged so that the whole of the traction sheave projects outside the horizontal projection plane of the car. A deflecting wheel 14 is arranged vertically above the traction sheave, and the hoisting rope is wound twice around the traction sheave via the deflecting wheel, as in the second embodiment. The winding angle is approximately 360 degrees as is apparent from the drawing, and the traction ability is sufficiently secured.

Further, since the traction sheave and the deflecting vehicle are arranged between the car and the hoistway, the size of the lower part of the car can be reduced, so that the size of the pit can be reduced or the pit has a sufficient space. This has the effect of making maintenance work easier. Further, the traction sheave and the deflecting wheel are brought closer to the car until the hoisting rope has a minimum size such that the hoisting rope does not come into contact with the car due to the swinging and vibration of the hoisting rope, thereby reducing the plane space of the hoistway.

Here, the warp wheel 14 has a diameter larger than that of the traction sheave 5a so that it can be wound around the traction sheave 5a, the return wheel 14, the traction sheave 5a, and the fixed portion at the top of the hoistway from the return wheel 9. Need to be smaller.

In the present embodiment, the warp wheel 14 is arranged on the vertical information of the traction sheave 5a, but may be arranged anywhere on the same plane as the traction sheave and the rotating surface. In this case, the diameter of the warp wheel 14 does not necessarily need to be smaller than that of the traction sheave 5a. However, when the warp wheel 14 exists immediately below the traction sheave 5a, the diameter of the warp wheel 14 needs to be larger than the traction sheave 5a.

In any of the first to third embodiments, at least one of the traction sheave and the deflecting wheel is formed of polyurethane with a groove portion in contact with the hoisting rope. By manufacturing with a polyacetal resin, polyamide resin such as hard nylon, etc., the durability of the hoisting rope is improved. Further, by using polyurethane or the like for the traction sheave, an effect of improving the traction ability as compared with the conventional cast iron can be obtained.

[0024]

The self-propelled elevator apparatus according to the first aspect of the present invention is a car having a hoisting rope having both ends locked at the upper part of a hoistway, and a traction sheave for winding the hoisting rope. A self-propelled elevator comprising a counterweight having a suspension wheel around which a hoisting rope is wound, and a return wheel provided at the upper part of the hoistway to suspend the basket and the counterweight in a hoisting manner. Since the drive device for driving the traction sheave is arranged at the lower part and part or all of the traction sheave is arranged outside the horizontal projection plane of the car, the size of the upper part of the car can be reduced, so that the building Height can be lowered. In addition, since the driving machine is not arranged on the car, a work platform for maintenance personnel is secured during maintenance, and a space for a rescue exit for rescuing emergency passengers is also secured.

In the self-propelled elevator device according to the second configuration of the present invention, the traction sheave is arranged at the center position of the side of the car where there is no entrance on the horizontal projection plane of the hoistway, so that the tension of the hoisting rope is increased. This reduces the moment generated in the car.

In a self-propelled elevator apparatus according to a third configuration of the present invention, at least one or more deflected wheels are arranged near the traction sheave such that the winding angle of the hoisting rope around the traction sheave is 180 ° or more. As a result, traction ability is improved.

In the self-propelled elevator device according to the fourth configuration of the present invention, at least one of the traction sheave and the deflecting wheel is made of a resin to make contact with the hoisting rope, so that the traction capability is improved. The durability of the hoisting rope can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a self-propelled elevator according to Embodiment 1 of the present invention.

FIG. 2 is a side view showing the entire configuration of the self-propelled elevator according to the first embodiment of the present invention.

FIG. 3 is a horizontal projection view of FIG. 2;

FIG. 4 is an overhead view showing Embodiment 2 of the present invention.

FIG. 5 is an overhead view showing Embodiment 3 of the present invention.

FIG. 6 is a schematic configuration diagram showing a conventional self-propelled elevator.

[Explanation of symbols]

1 basket, 2, 4 guide rails, 3 counterweights, 5
Drive device, 5a traction sheave, 5b motor,
5c brake / reducer, 6 hoisting rope, 7 suspension car,
8 return wheel, 9 mounting member, 10 hoistway, 11 guide roller, 12a, 12b, 13, 14 deflecting wheel.

Claims (4)

[Claims] 1. A counterweight having a hoisting rope having both ends locked to the upper part of a hoistway, a car having a traction sheave for winding the hoisting rope, and a hanging wheel for winding the hoisting rope, In a self-propelled elevator comprising a return car provided at the upper part of a hoistway and suspended in such a manner that a car and a counterweight can be lifted up and down in a hanging manner, a driving device for driving a traction sheave is arranged at a lower part of the car, and a traction sheave is provided. A self-propelled elevator device in which a part or the entirety of the elevator is arranged outside the horizontal projection plane of the car. 2. The self-propelled elevator device according to claim 1, wherein the traction sheave is arranged at a center position on a side of the car where no entrance is present on the horizontal projection plane of the hoistway. 3. The self-propelled vehicle according to claim 1, wherein at least one or more warp wheels are arranged near the traction sheave such that the winding angle of the hoisting rope around the traction sheave is 180 ° or more. Type elevator equipment. 4. The self-propelled elevator device according to claim 1, wherein a groove portion of at least one of the traction sheave and the deflecting wheel, which is in contact with the hoisting rope, is made of resin.