JPH0664863A - Elevator-driving system - Google Patents

Abstract

PURPOSE:To provide a system to drive an elevator by means of two winders and prevent the occurrence of the unbalance of a rope load and winding torque even when a speed difference is produced. CONSTITUTION:Two winders 3a and 3b are installed on the same floor, two balancing weights 7a and 7b are arranged so as to be elevated along both sides of a car 6, and a suspension rope 5 and a compensating rope 8 are interconnected through the balancing weights 7a and 7b so that the ropes form one loop. The suspension rope 5 is suspended to two sheaves 3a and 3b and deflector wheels 4a and 4b through a running block 10 arranged to the upper part of the car 6. A compensation rope 8 is arranged in a manner to pass pulleys 9a and 9b for the compensation rope through a running block 11 arranged to the lower part of a car 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to elevator drive systems.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional elevator 1: 1 roping drive system shown in, for example, "Elevator Escalator for Building Equipment" (Takeo Kimura et al., Published by Ohmsha). Is a motor, 2 is a brake, 3 is a sheave, and normally 1 to 3 are integrally assembled as one hoisting machine. 4 is a deflector wheel, 5 is a suspension rope whose both ends are connected to the basket 6 and the counterweight 7, 8 is a compensating rope which is also connected to the car 6 and the counterweight 7 at both ends, and 9 is a fixed pulley for the compensating rope 8. is there. The hoisting machine (motor 1, brake 2, sheave 3), deflector 4 and compensating rope fixed pulley 9 are fixed to the floor, beams, etc. of the building. FIG. 7 also shows a conventional elevator 2: 1 roping system, and the same numbers as in FIG. 6 indicate the same parts. In FIG. 7, the suspension rope 5 has both ends fixed to a structure such as a beam of a building. Further, 10 and 12 are moving pulleys fixed to the upper portions of the car 6 and the counterweight 7, respectively, and the suspension rope 5 suspends the car 6 and the counterweight 7 via these moving pulleys 10 and 12.

Next, the operation of the elevator drive system will be described. FIG. 6 shows a drive system called 1: 1 roping, which is configured to rotate a sheave 3 from a motor 1 and to raise or lower a car 6 via a suspension rope 5 suspended on the sheave 3. The lifting speed of 6 and the lifting speed of the suspension rope 5 are equal. The balance weight 7 is for balancing the car load (car weight + K * loading weight; K is a constant), and by providing this, the required torque and power of the hoisting machine can be reduced. Compensation rope 8
Is for compensating the unbalanced weight due to the difference in length between the suspension rope 5 on the car side and the suspension rope 5 on the balance weight side when a height difference occurs between the car 6 and the balance weight 7.
FIG. 7 shows a drive system called 2: 1 roping. As in FIG. 6, the sheave 3 rotates to hang up or hang up the car 6, but since the moving pulleys 10 and 12 are used, the car speed is It will be half the speed of the hanging rope. Generally, the 1: 1 roping scheme is used for high speed elevators and the 2: 1 roping scheme is used for elevators with large car capacity instead of being too fast. In addition, the baffle wheel 4 secures a clearance between the car 6 and the counterweight 7 so that the car 6 and the counterweight 7 do not contact each other in the same hoistway, and in order to improve the traction capacity of the hoisting machine. It is provided to realize a rope wrapping method called a full wrap method adopted in.

[0004]

As described above, the conventional elevator drive system has one hoisting machine (motor, brake,
Since the car was driven by a sheave, it was necessary to arrange a large single hoist having a large torque and a large output for a super large capacity elevator. Therefore, the size and weight of the hoisting machine are increased, and there is a problem that a hoisting crane having a large capacity and a large lifting height is required for installation during construction. In addition, it is necessary to develop a new large capacity hoisting machine.

The present invention has been made to solve the above problems, and provides a system for driving a car by two hoisting machines.

[0006]

An elevator drive system according to the present invention drives a car by two hoisting machines, and there is a speed difference due to a control error or the like between the two hoisting machines which are speed-controlled. The following means are provided in order to prevent the load on each hoisting machine and the imbalance of torque when it occurs.

According to the first aspect of the present invention, two hoisting machines are installed at the same height, the counterweight is divided into two, and both sides of the car are moved up and down. , Which are connected to each other through a counterweight to form a loop, and are configured to hang the car and the counterweight through two hoisting machines and a moving pulley provided on the top of the car, and are provided at the bottom of the car. It is a 1: 1 roping elevator drive system with a compensating rope suspended on a moving pulley.

According to the second aspect of the present invention, two hoisting machines are separately installed at different heights, and both ends of the hoisting rope are connected so as to form a loop by themselves. 1: 1 configured to suspend the car and the counterweight via a moving pulley provided on the machine and on the top of the car and the counterweight
It is a roping elevator drive system.

According to a third aspect of the present invention, two hoisting machines are installed at the same height, the counterweights are divided into two, and both sides of the car are lifted up and down. Connect both ends to form a loop of two hoisting machines,
The car and the counterweight are configured to be suspended through two moving pulleys provided on the top of the car, two moving pulleys provided on the two counterweights, and a fixed pulley installed on the building. This is a 2: 1 roping elevator drive system in which a compensating rope is arranged via a moving pulley provided at the bottom.

According to a fourth aspect of the present invention, two hoisting machines are separately installed at different heights, and both ends of the hoisting rope are connected so as to form a loop by themselves. The car and the counterweight are configured to be hung through the machine, three moving pulleys provided on the top of the car, three moving pulleys provided on the top of the counterweight, and a fixed pulley installed on the building. Two
It is a 2: 1 roping elevator drive system in which a car is driven by a single hoist.

[0011]

The elevator drive system according to the present invention comprises:
Two hoisting ropes for hoisting machines are connected so as to form one loop via a moving pulley provided on the car side or counterweight side, or a pulley fixed to the beam of the building, or two hoisting machines By connecting the hoisting rope for the machine and the compensating rope so as to form one loop, even if there is a speed difference between the hoisting machines, the load and hoisting torque shared by each hoisting machine can be equally divided. is there.

[0012]

【Example】

Base technology. First, FIG. 5 shows a basic configuration example of an elevator system in which a car is driven by two hoisting machines. In the figure, the same numbers indicate the same parts as in FIG. 6, and the subscripts a and b are described separately for each of the two hoisting machines. This system is a system in which two conventional 1: 1 roping systems shown in FIG. 6 are arranged and a car is integrated. In this system, the load applied to the two hoisting machines and the load applied to the suspension ropes 5a and 5b are equal if both hoisting machines are driven at exactly the same speed. However, even if the two hoisting machines are controlled in uniform speed, it is inevitable that a certain speed error will occur due to a control error, and an imbalance of the load cannot be avoided. Also,
If emergency braking is applied due to a power outage, etc., the speed of both hoisting machines will not be equal due to deviation of the brake application timing of both hoisting machines, rise error of brake torque, difference in friction force of brake lining, etc. Load imbalance can occur.

Embodiment 1. 1 shows an elevator drive system according to a first embodiment of the present invention, and the same reference numerals as those in FIGS. 5 and 6 indicate the same parts. That is, two hoisting machines (motor 1a, brake 2a, sheave 3a and motor 1b, brake 2b, sheave 3b) are arranged for one car 6. Further, reference numerals 10 and 11 denote movable pulleys provided on the upper and lower portions of the car 6, on which the suspension rope 5 and the compensation rope 8 are suspended. The hanging rope 5a shown in FIG.
5b is combined into one suspension rope 5 in FIG.
This suspension rope 5 is used for the sheaves 3a, 3 of both hoisting machines 1a, 1b.
b, the car 6 is hung via the deflecting wheels 4a, 4b and the moving pulley 10, and both ends of the car 6 are balanced weights 7a, 7b.
It is fixed to. Also, the compensation rope 8 in FIG.
a and 8b are also bundled as a compensation rope 8.
Pulleys 9a, 9b for compensating ropes and moving pulleys 11 under the car
Both ends thereof are connected to the counterweights 7a and 7b via. That is, the suspension rope 5 and the compensation rope 8 are connected to each other through the counterweights 7a and 7b so as to form one loop.

In the above structure, the motors 1a and 1b of the two hoisting machines are basically controlled in speed so that the sheaves 3a and 3b are wound in the same direction as the solid arrows (A, B) in FIG. Since the pulleys 10 and 11 rotate at a speed, the moving pulleys 10 and 11 basically do not rotate, and thus move up and down. When a speed difference occurs between the two hoisting machines, for example, the speed of the sheave 3a at the time of hoisting is the speed of the sheave 3b.
When the speed is higher than the speed of 1, the ascending and descending motion is performed while rotating in the direction of the dotted arrow in FIG. 1 at a speed corresponding to the speed difference between the sheaves 3a and 3b. In addition, the suspension rope 5 and the compensation rope 8
Are connected as one loop via the counterweights 7a and 7b, and the movable pulleys 10 and 11 can rotate according to the speed difference. Therefore, the load of the hoisting machine 5 on the hoisting machine (Fig. (Corresponding to the load of the ropes 5a and 5b of 5) is always equalized. In FIG. 1, the hoist 1a,
1b is installed on the same floor and has a counterweight 7
Since a and 7b move up and down both ends of the car 6, the entrance of the car 6 is arranged so as to be the front of FIG.

Example 2. In a typical elevator arrangement, the counterweight often comes up and down the back side of the car (opposite the car entrance) so that multiple elevators are lined up side by side. FIG. 2 shows an embodiment that enables such an arrangement. In FIG. 2, the same numbers and the same subscripts indicate the same parts as those in FIGS. 5 and 1. The motor and brake of the hoist are not shown. 12 is a counterweight 7
It is a moving pulley installed on the upper part of. In this method, two hoisting machines are installed on two floors, one on the top and one on the bottom, and the counterweight is 7
In addition, the pulleys 9 for compensating ropes are combined into one. Since the counterweight 7 is integrated into one piece, it can be arranged so as to move up and down in the back side of the hoistway on the side opposite to the car entrance. Since both ends of the hanging rope 5 are connected so as to form a loop by itself, and the car 6 and the counterweight 7 are hung via the moving pulleys 10 and 12, the moving ropes 10 and 12 are As in the first embodiment, the load of the hoisting rope of the hoisting machine can be always equalized by the action, and thus the torque of both hoisting machines can be equalized.

Embodiment 3. Although Examples 1 and 2 were application examples in the case of 1: 1 roping, Examples 3 and 4 below show application examples in the case of 2: 1 roping. 2 in FIG.
This is a configuration in which the hoisting machines for the bases are installed on the same floor, and the counterweights are arranged separately on both sides of the car. The same numbers and the same subscripts indicate the same parts as in FIGS. 1 and 2. The motor and brake are not shown. 13,14a, 14b
Indicates a pulley fixed to a building beam or the like. The moving pulleys installed on the upper part of the car 6 are divided into two, that is, 10a and 10b, and the moving pulleys 1 are respectively attached to the counterweights 7a and 7b.
2a and 12b are attached. Since both ends of the suspension rope 5 are connected so as to form a loop, and the car 6 and the counterweights 7a and 7b are suspended via the movable pulleys 10a, 10b, 12a, 12b, the suspension rope 5 according to the first embodiment is described. Similar to the case of the 1: 1 roping described above, even if there is a speed difference between the sheaves 3a, 3b of the hoisting machine, the rope load and hoisting torque applied to both hoisting machines can be equalized.

Embodiment 4. FIG. 4 is 2: 1 as in the third embodiment.
This is an application example of roping, and is a system in which two hoisting machines are installed separately on two floors, one on top of the other, and the counterweights 7 are combined into one. In the figure, the same numbers and the same subscripts indicate the same parts as in FIG. The motor and brake are not shown. Three moving pulleys 10a, 10b, and 10b,
10c and 12a, 12b, 12c are installed. As shown in FIG. 3, the suspension rope 5 has its both ends connected so as to form a loop by itself, and the movable pulley 1 above the car 6
0a, 10b, 10c, and 12a, 1 above the counterweight 7
Since the car 6 and the counterweight 7 are hung via the 2b and 12c, even if there is a speed difference between the sheaves 3a and 3b of the hoisting machine, the rope load and hoisting torque applied to both hoisting machines are equalized. can do. The effect on the elevator arrangement is similar to that of the second embodiment.

[0018]

As described above, according to the present invention, the suspension rope and the compensation rope are connected at both ends so as to form one loop, or the suspension rope itself is connected at both ends so as to form a loop, Even if a speed difference occurs between the hoisting machines by suspending the car and the counterweight through a pulley that is fixed to the beam of the building or a pulley that is fixed to the car or the counterweight. Unbalance of the rope load applied to the two hoisting machines can be eliminated, so that the torque sharing among the hoisting machines can be equalized. Further, since the hoisting machine is provided on the same floor and the hoisting machine is divided into upper and lower two floors, it is possible to cope with various elevator layouts in a building. Furthermore, since both 1: 1 roping and 2: 1 roping are possible,
Selection is possible according to the car specifications (car capacity, car speed) of the elevator.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an elevator drive system of 1: 1 roping according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing an elevator drive system of 1: 1 roping according to Embodiment 2 of the present invention.

FIG. 3 is a configuration diagram showing a 2: 1 roping elevator drive system according to Embodiment 3 of the present invention.

FIG. 4 is a configuration diagram showing an elevator drive system of 2: 1 roping according to Embodiment 4 of the present invention.

FIG. 5 is a basic configuration diagram showing an elevator drive system using two hoisting machines.

FIG. 6 is a basic configuration diagram showing a conventional 1: 1 roping elevator drive system.

FIG. 7 is a basic configuration diagram showing a conventional 2: 1 roping elevator drive system.

[Explanation of symbols]

 1,1a, 1b Motor 2,2a, 2b Brake 3,3a, 3b Sheave 4,4a, 4b Baffle wheel 5,5a, 5b Suspension rope 6 Car 7,7a, 7b Counterweight 8,8a, 8b Compensation rope 9 , 9a, 9b Compensation rope pulleys 10,10a, 10b, 10c Car upper pulleys 11 Car lower cages 12,12a, 12b, 12c Counterweight upper pulleys 13 2: 1 Fixed rope pulleys 14a, 14b Fixed pulley for 2: 1 roping

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[Procedure amendment]

[Submission date] September 30, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Embodiment 1. 1 shows an elevator drive system according to a first embodiment of the present invention, and the same reference numerals as those in FIGS. 5 and 6 indicate the same parts. That is, two hoisting machines (motor 1a, brake 2a, sheave 3a and motor 1b, brake 2b, sheave 3b) are arranged for one car 6. Further, reference numerals 10 and 11 denote movable pulleys provided on the upper and lower portions of the car 6, on which the suspension rope 5 and the compensation rope 8 are suspended. The hanging rope 5a shown in FIG.
5b is combined into one suspension rope 5 in FIG.
The suspension rope 5 suspends a car 6 via sheaves 3a and 3b of both hoisting machines , and deflecting sheaves 4a and 4b and a movable pulley 10, and both ends thereof are fixed to counterweights 7a and 7b. The compensating ropes 8a and 8b in FIG. 5 are also grouped together as the compensating rope 8, and both ends thereof are connected to the counterweights 7a and 7b through the compensating rope pulleys 9a and 9b and the moving pulley 11 under the car. Has been done. That is,
The hanging rope 5 and the compensating rope 8 are counterweights 7a, 7
They are connected via b to form one loop.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

In the above structure, the motors 1a and 1b of the two hoisting machines are basically controlled in speed so that the sheaves 3a and 3b are wound in the same direction as the solid arrows (A, B) in FIG. Since the pulleys 10 and 11 rotate at a speed, the moving pulleys 10 and 11 basically do not rotate, and thus move up and down. When a speed difference occurs between the two hoisting machines, for example, the speed of the sheave 3a at the time of hoisting is the speed of the sheave 3b.
If the speed is higher than the speed of No. 1, the moving pulleys 10 and 11 move up and down while rotating in the direction of the dotted arrow in FIG. 1 at a speed corresponding to the speed difference between the sheaves 3a and 3b. Further, the suspension rope 5 and the compensation rope 8 are connected as one loop via the counterweights 7a and 7b, and the movable sheaves 10 and 11 are configured to be rotatable according to the speed difference. 5 Hoisting machine side load (ropes 5a and 5b in FIG. 5)
(Corresponding to the load of) is always equalized. In addition, in FIG. 1, the hoisting machines 1a and 1b are installed on the same floor, and the counterweights 7a and 7b move up and down both ends of the car 6, so that the entrance of the car 6 is located in the front of FIG. Will be placed.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Example 2. The usual elevator layout is such that the counterweight moves up and down the back side of the car (opposite the car entrance) so that multiple elevators are lined up side by side.
Often . FIG. 2 shows an embodiment that enables such an arrangement. In FIG. 2, the same numbers and the same subscripts indicate the same parts as those in FIGS. 5 and 1. The motor and brake of the hoist are not shown. 12 is a counterweight 7
It is a moving pulley installed on the upper part of. In this method, two hoisting machines are installed on two floors, one on the top and one on the bottom, and the counterweight is 7
In addition, the pulleys 9 for compensating ropes are combined into one. Since the counterweight 7 is integrated into one piece, it can be arranged so as to move up and down in the back side of the hoistway on the side opposite to the car entrance. Since both ends of the hanging rope 5 are connected so as to form a loop by itself, and the car 6 and the counterweight 7 are hung via the moving pulleys 10 and 12, the moving ropes 10 and 12 are As in the first embodiment, the load of the hoisting rope of the hoisting machine can be always equalized by the action, and thus the torque of both hoisting machines can be equalized.

Claims (4)

[Claims] 1. The two hoisting machines are installed at the same height, the counterweights are divided into two, and both sides of the car are moved up and down, and the suspension rope and the compensation rope form one loop. Are connected to each other via a counterweight, and the car and the counterweight are configured to be suspended by two hoisting machines and a moving pulley provided on the upper part of the car, and a compensating rope is provided on the moving pulley provided on the lower part of the car. 1: 1 roping elevator drive system in which the car is suspended and the car is lifted and lowered by two hoisting machines. 2. Two hoisting machines are separately installed at different heights, and both ends of the hoisting rope are connected so as to form a loop by themselves. A 1: 1 roping elevator drive system configured to suspend a car and a counterweight via a moving pulley provided above the counterweight, and to drive the car up and down by two hoisting machines. 3. The two hoisting machines are installed at the same height, the balancing weights are divided into two and arranged so as to move up and down on both sides of the car, and the suspension rope itself forms one loop. Connect both ends to the two hoisting machines, two moving pulleys provided on the top of the car, two moving pulleys provided on the two counterweights, and a fixed pulley installed on the building, An elevator with a 2: 1 roping configured to suspend a car and a counterweight, and a compensating rope is suspended on a moving pulley provided at the bottom of the car to drive the car up and down by two hoisting machines. Drive system. 4. The two hoisting machines are separately installed at different heights, and both ends of the hoisting rope are connected so that the hoisting rope forms a loop by itself. Provided 3
3 moving pulleys, 3 moving pulleys on top of the counterweight,
In addition, a 2: 1 roping elevator drive system configured to suspend a car and a counterweight through a fixed pulley installed in a building and drive the car with two hoisting machines.