JP2005206263A - Elevator drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To balance the own weight of a hoisting machine by transmitting the driving force from the hoisting machine by a driving rope attached to the lower part of the carousel and the weight while eliminating the balance imbalance function of the car and the weight. An elevator driving device is obtained as a part of the function of eliminating imbalance.
SOLUTION: An elevator car 1 and a weight 2 that move up and down in a hoistway, a main rope 4 that suspends a car and a weight, and a driving rope or a driving belt that has both ends attached to a car lower part and a weight lower part, respectively. 7 and a hoisting machine 5 provided on the hoistway pit part around which a driving rope or a driving belt is wound.
[Selection] Figure 1

Description

  The present invention relates to a drive device for an elevator, and as a balance device for a car and a weight, drives an elevator by driving a rope, a chain, a belt, and the like that are attached so as to connect the bottom of the car and the bottom of the weight. .

In the conventional elevator driving apparatus, in the case of 1: 1 roping, for example, as shown in FIG. 7, the main rope 4 in which the car 1 and the weight 2 are suspended is driven by the hoisting machine 5. In addition, as shown in FIG. 8, even when the basement is used, there may be a case where three or more return wheels 3 are required. Further, in an elevator without a machine room as shown in FIG. 9 which has become the mainstream in recent years, since the number of return wheels 3 is large by 2: 1 roping, the rope life is short, and the possibility of frequent rope switching may occur. There is. In addition, although there is a type in which the hoisting machine is arranged in the upper part of the hoistway with the same machine room-less elevator and the number of return wheels is reduced, there is a drawback that maintenance work of the hoisting machine becomes difficult. In the figure, 11 is a balancing rope, 12 is a balancing wheel and a weight, and 13 is a balancing chain.
As another conventional technique, an upper pulley is installed at the upper part of the hoistway, an upper rope is hung on the upper pulley, a cage is suspended from one end of the upper rope, and a weight is suspended at the other end of the upper rope. Attach the lower rope to the cage and attach one end of the lower rope. The lower rope is hooked on the hoisting machine from the one end of the lower rope through the cage guide pulley installed at the lower part of the hoistway. The lower rope hung on the machine device has an elevator drive system in which the other end portion is attached to the weight through a weight guide pulley installed at the lower part of the hoistway (for example, see Patent Document 1).
Moreover, in a normal elevator, a balancing chain, a balancing rope, etc. may be attached in order to eliminate the balance imbalance between the car and the weight. These balancing chains, balancing ropes, and the like are attached to the car lower part at one end and the weight lower part at the other end. In the past, these balancing chains and balancing ropes only served as additional compensation weights. On the other hand, the load applied to the sheave shaft of the hoisting machine is added to the weight of the balance chain and the balance rope, so that the sheave shaft must be constructed to withstand such as thickening the sheave shaft.

Japanese Patent Laid-Open No. 9-40322

In the conventional elevator driving apparatus, in the case of 1: 1 roping in FIG. 7, a machine room in which the hoisting machine 5 is installed at the upper part of the hoistway is necessary. Further, in the case of the basement shown in FIG. 8, a space for placing the return wheel on the top is required and a large overhead dimension is required. In addition, in the case of the machine room-less 2: 1 roping shown in FIG. 9, there is a drawback that the rope life is short, and the rope change may occur frequently. . In addition, when the hoisting machine is located in the upper part of the hoistway, the hoisting machine needs to be maintained from the top of the car, so that it is difficult to perform maintenance work when the car needs to be adjusted while moving. there were.
Moreover, the thing of patent document 1 is provided in the machine room which installs a hoisting machine apparatus in the side of the lowermost part of a hoistway, the slightly upper part of the hoistway, or the side of the lower part, It was difficult to eliminate the machine room.
In addition, when a balancing chain, balancing rope, etc. are attached, the load applied to the sheave axle of the hoisting machine is added to the weight of the balancing chain and the balancing rope, so that the hoisting machine support load increases. For example, in the case of the upper machine room as shown in FIG. 7, an increase in the load applied to the floor surface of the machine room is incurred.

  This invention was made in order to solve the above-mentioned problems, and the driving force from the hoisting machine was attached to the lower part of the car and weight while maintaining the balance imbalance function of the car and weight. An elevator drive device is provided that transmits the weight of the hoisting machine itself as a part of the function of resolving the imbalance of balance by transmitting it through the drive rope.

  In the elevator driving apparatus according to the present invention, the elevator car that moves up and down in the hoistway and the weight, the main rope that suspends the car and the weight, and the drive in which both ends are attached to the lower part of the car and the lower part of the weight, respectively. A rope or drive belt, and a hoisting machine on which a drive rope or drive belt is wound and provided in a hoistway pit part are provided.

According to the elevator drive device of the present invention, the hoisting machine can be disposed in the hoistway pit portion, and the machine room can be easily eliminated. In addition, since the main rope only holds the weight of the car and the weight, the layout of the upper return wheel is simplified, and the number of parts can be reduced and the size of the overhead part can be reduced. Moreover, since it always has a balancing rope, the traction ratio can be kept low and energy efficiency is good. In addition, since the method of hanging the rope is relatively simplified, it is possible to expect a longer life of the rope.
Thereby, it is not necessary to install the hoisting machine at the upper part of the hoistway, and the machine room can be eliminated. In addition, since it is not necessary to add more weight than necessary, the increase in the weight of the hoisting machine is suppressed, and the burden on the building is reduced. In addition, maintainability of the hoisting machine is improved by installing the hoisting machine at the bottom of the hoistway.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing an elevator driving apparatus according to Embodiment 1 for carrying out the present invention, and FIG. 2 is an enlarged view showing a driving force transmission structure using a belt of the elevator driving apparatus according to Embodiment 1 of the present invention. FIG.
FIG. 1 shows a machine room-less embodiment of 1: 1 roping. The upper end of the elevator car 1 and the upper portion of the weight 2 are connected to both ends of a main rope 4 that is folded back through two return wheels 3 disposed in the upper part of the hoistway. The hoisting machine 5 is attached to the lower pit part of the hoistway so as to be movable in the vertical direction along the guide rail 6 by a hoisting machine guide rail 6 fixed on the pit part. Both ends of a drive rope or drive belt 7 are connected to the bottom of the car 1 and the weight 2, respectively. The drive rope or drive belt 7 is wound around the hoisting machine 5.
When the driving force is transmitted from the hoisting machine 5, the frictional force between the hoisting sheave and the driving rope or the driving belt 7 must be sufficient. FIG. 2 shows a driving force transmission structure for preventing the hoisting sheave and the driving belt 7 from slipping.
In FIG. 2, a toothed belt is used as the driving belt 7 and is combined with the toothed gear on the sheave side of the hoisting machine 5 to completely eliminate the sliding of the driving belt 7.
In the first embodiment, the hoisting machine 5 can freely move in the vertical direction along the hoisting machine guide rail 6 and absorbs the elongation of the driving rope or the driving belt 7. Since the weight of the hoisting machine 5 is used, it is not necessary to add a weight for pulling the rope downward. The hoisting machine guide rail 6 has a lock-down mechanism and prevents the car and weight from being pushed up in an emergency. Further, since the winding of the main rope 4 is simplified, the life of the main rope 4 can be extended and the replacement of the rope can be simplified.

Embodiment 2. FIG.
FIG. 3 is a schematic configuration diagram showing an elevator driving apparatus according to Embodiment 2 of the present invention, and FIG. 4 is an enlarged view showing a driving force transmission structure using a rope of the elevator driving apparatus according to Embodiment 2 of the present invention.
FIG. 3 shows a machine room-less example of 2: 1 roping. By disposing one return wheel 3 arranged at the upper part of the hoistway on the upper side (upper side) of the elevator car 1, the overhead dimension can be reduced as compared with that of the first embodiment. It is a thing.
Suspension wheels 9 a are provided at the lower part of the elevator car 1 and the upper part of the weight 2, respectively. The main rope 4 having one end fixed to the upper part of the hoistway is folded back through a suspension wheel 9a at the lower part of the car 1, a return wheel 3 at the upper part of the hoistway, and a suspension car 9b at the upper part of the weight 2. The other end of the main rope 4 is fixed to the upper part of the hoistway. The hoisting machine 5 and the deflecting wheel 8 are attached to the lower pit portion of the hoistway so as to be movable in the vertical direction along the guide rail 6 by a hoisting machine guide rail 6 fixed on the pit portion. . Both ends of a drive rope or drive belt 7 are connected to the bottom of the car 1 and the bottom of the weight 2, respectively. The drive rope or drive belt 7 is wound around the hoisting machine 5 and the deflector 8, respectively. It has been.
When the driving force is transmitted from the hoisting machine 5, the frictional force between the hoisting sheave and the driving rope or the driving belt 7 must be sufficient. FIG. 4 shows a driving force transmission structure for preventing the hoisting sheave and the driving rope 7 from slipping.
In FIG. 4, the deflecting wheel 8 is arranged in parallel with the sheave of the hoisting machine 5, and the drive rope 7 is wound around the hoisting machine sheave and the deflecting wheel 8 at least once, and the winding angle to the sheave is The frictional force is increased so that is 180 degrees or more.
In the second embodiment, the hoisting machine 5 can freely move in the vertical direction along the hoisting machine guide rail 6 and absorbs the elongation of the driving rope or the driving belt 7. Since the weight of the hoisting machine 5 is used, it is not necessary to add a weight for pulling the rope downward. The hoisting machine guide rail 6 has a lock-down mechanism and prevents the car and weight from being pushed up in an emergency. Further, by arranging the return wheel 3 at the upper part of the hoistway on the upper side (upper side) of the car 1, the overhead dimension can be reduced as compared with the first embodiment. In addition, the length of the main rope 4 is shortened and the winding of the main rope 4 becomes simpler than a machine room-less elevator having the same structure as shown in FIG.

Embodiment 3 FIG.
FIG. 5 is an enlarged view showing a driving force transmission structure using a rope of an elevator driving apparatus according to Embodiment 3 of the present invention.
In FIG. 5, a deflecting wheel 8 is arranged between two sheaves of the hoisting machine 5, and a pressing force generating mechanism 10 such as a pressing spring is provided between the deflecting wheel 8 and a pit portion. The pressing force generating mechanism 10 applies a constant tension to the driving rope or the driving belt 7 to keep the frictional force constant. The elongation of the drive rope or drive belt 7 can be absorbed by the displacement of the deflecting wheel 8 on which the pressing force is acting.
In the example of the third embodiment, since the hoisting machine 5 does not move in the vertical direction, the hoisting machine guide rail 6 is not required. The pressing force generating mechanism 10 has a lock-down mechanism, and has a structure that prevents the car and weight from being pushed up in an emergency.

Embodiment 4 FIG.
FIG. 6 is an enlarged view showing a driving force transmission structure using a rope of an elevator driving apparatus according to Embodiment 4 of the present invention.
In FIG. 6, two upper and lower baffles 8 a and 8 b are arranged on the upper part of the hoisting machine 5, and the lower baffle 8 b arranged between the hoisting machine 5 and the upper baffle 8 a and the hoistway fixing part, etc. Is provided with a pressing force generating mechanism 10 such as a pressing spring. The pressing force generating mechanism 10 applies a constant tension to the driving rope or the driving belt 7 to keep the frictional force constant. The elongation of the drive rope or drive belt 7 can be absorbed by the displacement of the deflecting wheel 8 on which the pressing force is acting.
In the example of the fourth embodiment, since the hoisting machine 5 does not move in the vertical direction, the hoisting machine guide rail 6 is not required. The pressing force generating mechanism 10 has a lock-down mechanism, and has a structure that prevents the car and weight from being pushed up in an emergency.
To do.

1 is a schematic configuration diagram illustrating an elevator drive device according to Embodiment 1 of the present invention. It is an enlarged view which shows the driving force transmission structure by the belt of the drive device of the elevator in Embodiment 1 of this invention. It is a schematic block diagram which shows the drive device of the elevator in Embodiment 2 of this invention. It is an enlarged view which shows the driving force transmission structure by the rope of the drive device of the elevator in Embodiment 2 of this invention. It is an enlarged view which shows the driving force transmission structure by the rope of the drive device of the elevator in Embodiment 3 of this invention. It is an enlarged view which shows the driving force transmission structure by the rope of the drive device of the elevator in Embodiment 4 of this invention. It is a schematic block diagram which shows the drive device of the conventional upper machine room elevator. It is a schematic block diagram which shows the drive device of the conventional basement elevator. It is a schematic block diagram which shows the drive device of the conventional machine room-less elevator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Weight 3 Return wheel 4 Main rope 5 Hoisting machine 6 Guide rail 7 Drive rope or drive belt 8 Baffle 9 Suspension wheel 10 Pushing force generation mechanism 11 Balance rope 12 Balance wheel and weight 13 Balance chain

Claims (8)

An elevator car and a weight moving up and down in the hoistway;
A main rope for suspending the car and weight;
A drive rope or drive belt having both ends attached to the car lower part and the weight lower part, respectively;
The hoisting machine on which the driving rope or driving belt is wound and provided in the hoistway pit part;
An elevator drive device comprising: An elevator car and a weight moving up and down in the hoistway;
A main rope for suspending the car and weight;
A drive rope or drive belt having both ends attached to the car lower part and the weight lower part, respectively;
The hoisting machine on which the driving rope or driving belt is wound and provided in the hoistway pit part;
A guide rail for a hoisting machine provided in the hoistway pit part and attached to the hoisting machine so as to be movable in the vertical direction;
An elevator drive device comprising:   The drive device for an elevator according to claim 1 or 2, wherein the drive rope or the drive belt has a function as a balance device for eliminating a balance imbalance between the car and the weight.   The drive of an elevator according to any one of claims 1 to 3, wherein the drive belt has a drive force transmission structure using a toothed belt as a drive belt and combined with a toothed gear on a sheave side of a hoisting machine. apparatus.   The sloping wheel is arranged in parallel with the sheave of the hoisting machine, and the driving rope between the hoisting machine sheave and the deflecting wheel is wound around one or more times. The elevator drive apparatus in any one. 2. A pressing force generating mechanism for applying a constant tension to the driving rope or the driving belt and maintaining a constant frictional force with the hoisting sheave is provided in the vicinity of the hoisting machine. Item 4. The elevator driving device according to any one of items 3 to 4.   7. The elevator driving apparatus according to claim 6, wherein a pressing force generating mechanism is provided between the deflecting wheel disposed between the two sheaves of the hoist and the hoistway pit portion.   The elevator driving device according to claim 6, wherein two upper and lower baffles are arranged on an upper part of the hoisting machine, and a pressing force generating mechanism is provided between the lower baffle and the hoistway fixing portion.

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