JPH0867465A - Inclination adjustment device of elevator cage - Google Patents

Abstract

PURPOSE: To reduce inclination of an elevator cage by finding a point of the center of gravity of a load on the side of the cage and load total quantity in accordance with a load detection signal detected by cage side load detection devices provided on four corners under the cage, deciding a load duty position in accordance with a set hanging center position and controlling a center of gravity position adjustment means. CONSTITUTION: A cage side load is detected by cage side load detection devices 1-4, and its detection signal is input to a detection circuit 5. The detection circuit 5 finds a point of the center of gravity of the cage side load and load total quantity from each of cage load detection signals. A computing circuit 6 decides a position of a balance weight in accordance with these point of the center of gravity and load total weight, the position of the balance weight and a cage hanging center position 9. A balance weight drive device 7 drives a balance weight drive device 8 in accordance with this balance weight position signal and adjusts the position of the balance weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car inclination adjusting device for adjusting an inclination due to a shift of a center of gravity of an elevator car.

[0002]

2. Description of the Related Art In a conventional elevator, people and luggage are placed in a car at an arbitrary position on the floor of the car.
The center of gravity of the load on the car side may be displaced from the suspension core of the car.

Therefore, when the center of gravity of the load on the side of the car deviates from the suspension core of the car, there is no means for correcting the inclination of the car. Therefore, the center of gravity of the load on the car deviates from the center of the suspension car. The elevator car moves up and down while still tilting in the direction.

[0004]

As described above, in the conventional elevator, when the load on the car side shifts with respect to the suspension core position, the car moves up and down while tilting, so that vibration occurs in the car and the ride comfort is improved. Was getting worse.

Further, the elevator is provided with a guide mechanism for causing the car to travel along the car-side guide rails. However, when the car is tilted and travels, an extra force is applied to the guide shoes and the guide rollers which form the guide mechanism. Not only does this shorten the life due to deformation and wear, but there is also a great risk that the car will not come off the guide rails especially during an earthquake.

The present invention has been made in view of the above circumstances, and when the center of gravity of the car deviates from the suspension core due to variations in the mounting positions of people and luggage in the car, the center of gravity of the car is suspended. An object of the present invention is to provide an elevator car tilt adjusting device that can be adjusted so as to match the core position to reduce the car tilt.

[0007]

In order to achieve the above object, the present invention constitutes an elevator car inclination adjusting device by the following means. The invention corresponding to claim 1 is installed at four corners between an underfloor of an elevator car and a base of a car frame, respectively, and a car-side load detection device for detecting a car-side load, and between the car underfloor and the base. It is movably installed and adjusts the center of gravity of the car load by moving the load and the car center of gravity position adjusting means and the car side load based on the load detection signals detected by the car side load detection devices. Detecting means for detecting the center of gravity and the total load of the car, and the moving position of the load based on the center of gravity of the car side load and the total load of the car detected by this detecting means and the suspension core position of the car given in advance. It is provided with a calculating means for obtaining and a controlling means for controlling the center of gravity position adjusting means by the position signal obtained by the calculating means to move the load to the moving position.

The invention corresponding to claim 2 is the above claim 1.
The detection means of the invention corresponding to the above is to take in the load detection signal detected by each car side load detection device on condition that the elevator is stopped, and obtain the center of gravity of the car side load and the total load. .

The invention corresponding to claim 3 is a car-side load detection device which is installed at each of four corners between an underfloor of an elevator car and a base of a car frame, and which detects a car-side load, the car floor and the base. Is provided movably between the two, to adjust the center of gravity of the car load by moving the load, and based on the car center of gravity position adjusting means and the load detection signals detected by the car side load detection devices. Detecting means for detecting the center of gravity of the load and the load on the car side from the deviation between the center of gravity of the load on the car side and the current position of the load on the car, and the load load and the load on the car side detected by this detecting means. A calculating means for obtaining the moving position of the load load from the deviation between the center of gravity and the suspension core position of the car, and a position signal of the load load obtained by this calculating means is limited to operate the center of gravity position adjusting means. And suppressing limiter vibration generated, in which the control to the applied load the center-of-gravity position adjustment means by the position signal obtained through the limiter and a control means for moving the moving position.

The invention corresponding to claim 4 is the above claim 1.
Alternatively, the means for adjusting the center of gravity of the load on the car side of the invention corresponding to item 3 or 3 is provided with a balance weight drive device for the X direction and the Y direction that moves two-dimensionally in the X direction and the Y direction in the plane between the car floor and the base. At the same time, a balance weight that is connected to these balance weight driving devices and that moves in the x direction and the y direction is provided.

The invention corresponding to claim 5 is the above claim 1.
Alternatively, the means for adjusting the center of gravity of the load on the car side of the invention corresponding to item 3 has a balance weight arranged on each side between the floor of the car body and the base so as to be movable two-dimensionally in the X and Y directions, and Among the balance weights of the respective side portions, a balance weight drive device is provided which moves the facing balance weights in the linear direction while keeping the facing distance constant in the x direction or the y direction.

[0012]

In the elevator car tilt adjusting device of the invention according to claim 1, when the center of gravity of the car deviates from the suspension core due to variations in the mounting positions of people and luggage in the car, The center of gravity of the car side load and the total load applied to that center of gravity are obtained from the load detection signals detected by the car side load detection devices installed at the four corners, and the center of gravity of these car side loads and the total load are given in advance. By determining the position of the load load based on the car suspension core position and controlling the center of gravity position adjusting means, the load load is moved to a position where the center of gravity of the car and the suspension core position match. The tilt can be adjusted.

In the elevator car inclination adjusting device according to the invention as defined in claim 2, the center of gravity of the car load is determined based on the load detection signals detected by the car side load detecting devices only when the elevator is stopped. Since the total load is calculated and the load is moved to the position where the center of gravity of the car coincides with the suspension core position, the inclination of the car can be adjusted safely.

In the elevator car inclination adjusting device according to the invention of claim 3, the center of gravity of the car load including the load load is fed back, and the deviation between the center of gravity of the car load and the suspension core position of the car is detected. Since the position of the load load is obtained and the position signal of the load load is further limited by the limiter to operate the center-of-gravity position adjusting means, it is possible to suppress the vibration generated by the operation of the center-of-gravity position adjusting means when the load is moved. .

In the elevator car inclination adjusting apparatus according to the inventions corresponding to claims 4 and 5, only the means for adjusting the center of gravity of the car load of a simple mechanism including the balance weight and the balance weight drive device is used. Thus, the center of gravity of the car load can be made to coincide with the suspension core position of the car.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a mounted state of a car side device of an embodiment of an elevator car tilt adjusting device according to the present invention. In FIG. 1, 13 is a car body of an elevator that moves up and down in a traveling path provided in a building. The car body 13 is placed and fixed on a base 14 of a car frame, and both sides of the base 14 are fixed. Both ends are integrally attached to the substantially central portion of the car through a hanging portion 15 of a car frame so that the rope 16 can be lifted and lowered by a drive mechanism (not shown).

In such an elevator car, the car-side load detecting devices 1 to 1 are integrally formed between the four corners of the car body 13 under the floor and the base 14 and an elastic body (not shown) for preventing vibration of the car. 4 are provided respectively. Each of the car-side load detection devices 1 to 4 detects the car-side load by detecting the amount by which the elastic body linearly contracts.

Further, a balance weight 10 is provided between the under floor of the car body 13 and the base 14, and an X-direction drive device 11 for moving on an orbit (x direction) formed on the front end side of the car is provided. At the same time, the Y-direction driving device 12 that moves on the orbit (y direction) formed on the one side end of the car is provided.

As shown in FIG. 2, the balance weight 10 is provided with a through hole 10a extending through the y direction and a through hole 10b extending through the x direction so as not to communicate with each other, and the through hole 10a extending through the y direction. The connecting rod 17a made of a steel material is inserted through the end, and one end of the connecting rod 17a is moved in the X-direction drive device 1
1, and the other end is supported on the rear end side of the car so as to be movable in the x direction. In addition, a connecting rod 17b made of steel is inserted into the through hole 10b that comes out in the x direction, one end of the connecting rod 17b is connected to the Y direction drive device 12, and the other end is supported on the other side end of the car so as to be movable in the y direction. ing.

Therefore, by appropriately moving the X-direction driving device 11 and the Y-direction driving device 12 in the x-direction and the y-direction, the balance weight 10 can be moved to an arbitrary position on the two-dimensional plane.

FIG. 3 is a block circuit diagram showing an embodiment of an elevator car inclination adjusting device according to the present invention. In FIG. 3, 5 is a detection circuit to which the car side load detection signals respectively detected by the car side load detection devices 1 to 4 described above are input, and this detection circuit 5 is the center of gravity of the car side load from each car load detection signal. The points and the total load are calculated.

Reference numeral 6 denotes the balance weight 1 based on the center of gravity of the car-side load and the total load, the position of the balance weight 10 and the car suspension core position 9 obtained by the detection circuit 5.
An arithmetic circuit for determining the position of 0, 7 controls the balance weight drive device (X-direction drive device 11 and Y-direction drive device 12 in FIG. 1) 8 by the position signal of the balance weight determined by the operation circuit 6. It is a balance weight position control circuit for adjusting the balance weight position.

Next, the operation of the elevator car inclination adjusting device constructed as described above will be described. Now, assuming that the center of gravity of the load in the car is at a position displaced from the suspension core position of the car, at this time, by the car side load detection devices 1 to 4 provided at the four corners of the car body 13 under the floor. The detected car side load detection signal is input to the detection circuit 5. Then, in this detection circuit 5, the center of gravity of the car side load and the total load are obtained from the respective load detection signals and input to the arithmetic circuit 6. The arithmetic circuit 6 executes the calculation based on the center of gravity of the load on the car side, the total amount of the load, and the suspension core position of the car to determine the position of the balance weight.

As shown in FIG. 4, the position of the balance weight is determined by the distance X from the suspension core O to the car-side load center of gravity p, the total car load Mg, and the balance weight load mg Mg · X = mg. -X ... Calculate the value of x that satisfies the expression (1) given by (1) and determine the position of the center of gravity of the balance weight.

The position signal of the center of gravity of the balance weight thus determined is the balance weight position control circuit 7
Input to the balance weight position control circuit 7
Controls the balance weight drive device (X-direction drive device 11 and Y-direction drive device 12 shown in FIG. 1) 8 to adjust the position of the balance weight so that the center of gravity of the total load and the suspension core position of the car match. .

Therefore, even if the center of gravity of the car deviates from the suspension core position of the car due to variations in the mounting positions of people and luggage in the car, the center of gravity of the car is adjusted to match the suspension core position of the car. Therefore, the inclination of the car can be reduced.

Next, another embodiment of the present invention will be described. FIG. 5 is a block diagram showing a control system of balance weight position control. In FIG. 5, reference numeral 21 indicates the deviation between the position of the balance weight moved by the balance weight driving device 24 and the center of gravity obtained from the in-car unbalanced load (disturbance) detected by the load detection devices provided at the four corners of the car floor. A detection circuit for detecting the center of gravity due to the balance weight and the eccentric load in the car.

Further, 22 is input with the balance weight detected by the detection circuit 21 and the deviation between the center of gravity due to the eccentric load inside the car and the suspension core position of the car, and the position of the balance weight is determined according to this deviation. The arithmetic circuit 23 is a limiter circuit that limits the position signal of the balance weight input from the arithmetic circuit 22 to suppress the torque to the balance weight drive device 24 and reduces the vibration generated by moving the balance weight. The limiter circuit 23 gives a balance weight position command signal to the balance weight driving device 24.

In the tilt adjusting device for the elevator car constructed as described above, the balance weight driving device 24
When the deviation between the current position signal of the balance weight moving on the two-dimensional plane and the center-of-gravity point signal of the eccentric load in the car is input to the detection circuit 21, the detection circuit 21 detects the deviation signal from the balance weight and the inside of the car. Find the center of gravity due to the eccentric load. When the deviation between the center of gravity determined by the detection circuit 21 and the car suspension core position is input to the arithmetic circuit 22, the arithmetic circuit 22 determines that the center of gravity of the in-car load is the car suspension center according to the deviation. The position of the balance weight that matches the position is determined, and the position signal is given to the limiter circuit 23.

In the limiter circuit 23, in order to suppress the vibration generated by moving the balance weight, the torque of the balance weight drive device 24 is limited and a balance weight position command signal is given to the balance weight drive device 24. As a result, the balance weight driving device 24 moves the balance weight so that the center of gravity due to the eccentric load of the car coincides with the suspension core of the car.

According to the control system having such a structure, the balance weight and the position of the balance weight are determined from the deviation of the center of gravity of the eccentric load in the car from the position of the suspension core of the car. The position of the center of gravity of the car-side load, which fluctuates as the weight moves, can be obtained with higher accuracy. In addition, the position signal of the balance weight determined by the arithmetic circuit 22 is given to the limiter circuit 23 to limit the torque, and then the balance weight drive device 24
Since the balance weight is moved by, the vibration generated by the movement of the balance weight can be suppressed.

FIG. 6 is a block circuit diagram showing another embodiment of the present invention. In this embodiment, as shown in FIG. 6, the balance weight drive device 39 is controlled by using the microcomputer 33.

The microcomputer 33 includes an input interface 34, a central processing unit (CPU) 35,
A read only memory device (ROM) 36, a read / write memory device (RAM) 37, an output interface 38, and a car traveling detection device 31 for detecting whether or not the car is traveling, as shown in FIG. The respective detection signals of the car side load detection devices 32a to 32d installed at the four corners under the floor are taken into the microcomputer 33 via the input interface 34, respectively.

The ROM 36 is programmed with the function for executing the flowchart shown in FIG. 7, and the RAM 37 stores the state quantity input via the input interface 34.

Further, the CPU 35 controls the detection devices 31, 3
Based on the information taken in from 2a to 32d, the processing is sequentially executed by the program function stored in the ROM 36, and an appropriate position signal is output to the balance weight drive device 39 via the output interface 38. .

Here, C according to the flow chart shown in FIG.
The processing of the PU 35 will be described. First, it is determined whether or not the elevator is traveling based on the signal input from the car traveling detection device 31, and when the vehicle is not traveling, the load detection signals detected by the car side load detection devices 32a to 32d are taken in, Calculate the center of gravity of the car side load and the total load.

Next, the position of the balance weight is determined based on the center of gravity of the car load and the total load and the position of the car suspension core, and the balance weight position signal is used to move the balance weight to the center of gravity of the car side load and the car suspension. Move so that the core positions match.

Then, it is judged whether or not the center of gravity of the car load coincides with the position of the suspension core of the car. If they coincide with each other, the position adjustment of the balance weight is terminated, and if they do not coincide, the initial state is returned to. , Repeat the steps as described above.

Therefore, by performing the above-described program processing by the microcomputer 33 on condition that the elevator is stopped, the center of gravity of the load on the car side can be made to coincide with the suspension core position of the car. The elevator car is not operated while being tilted due to an unbalanced load, and unnecessary force is not applied to the guide shoes and the guide rollers.

In each of the above-mentioned embodiments, as shown in FIG. 1, a balance weight 10 is provided between the floor of the car body 13 and the base 14, and further on the track formed in the front end side of the car (in the x direction). X-direction driving device 11 that moves the car and Y that moves on the orbit (y-direction) formed on one side end of the car.
Although the balance weight 10 is moved to an arbitrary position on the two-dimensional plane by the direction drive device 12, the balance weight is provided along the track on each side between the floor of the car body 13 and the base 14 of the car frame. And a balance weight drive device that moves in a linear direction with the facing distance held constant in the x direction or the y direction for the balance weights facing each other among the balance weights of the respective side portions, The balance weight driving device may be controlled so that the center of gravity of the car-side load coincides with the suspension core of the car.

[0041]

As described above, according to the present invention, when the center of gravity of the car deviates from the suspension core due to variations in the mounting positions of people and luggage in the car, the center of gravity of the car becomes the suspension core position. Adjust to match and prevent the car from tilting. Further, since the car is always balanced, the vibration in the car generated due to the unbalanced load can be suppressed, and the elevator can have a comfortable ride.

Further, since the basket does not run in an inclined manner with respect to the car side rail, no extra force is applied to the guide shoe or guide roller device that is the car guide mechanism, and deformation and wear are not reduced, so that the service life is extended. become longer. In particular, when an earthquake occurs, by reducing the inclination of the car, the possibility of rail derailment of the car can be reduced, and safety performance can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a mounting configuration of a car side device in an embodiment of an elevator car tilt adjusting device according to the present invention.

FIG. 2 is a perspective view showing the configuration of a balance weight in FIG.

FIG. 3 is a block diagram showing an embodiment of a tilt adjusting device for an elevator car according to the present invention.

FIG. 4 is an explanatory view of the principle of slack for determining the moving position of the balance weight in the embodiment.

FIG. 5 is a block diagram of a control system showing another embodiment of the present invention.

FIG. 6 is a block diagram of a microcomputer showing another embodiment of the present invention.

FIG. 7 is a view showing a flowchart for explaining the operation of the embodiment.

[Explanation of symbols]

1 to 4 ... Car side load detection device, 5 ... Detection circuit, 6 ...
… Arithmetic circuit, 7 …… Balance weight drive device, 8 ……
Balance weight position control circuit, 9 ... Car suspension core position, 10 ... Balance weight, 11, 12 ... X-direction drive device and Y-direction drive device, 13 ... Car body, 14
…… Car frame base, 15 …… Car frame suspension, 16…
... rope, 17a, 17b ... connecting rod, 21 ... detection circuit, 22 ... arithmetic circuit, 23 ... limiter circuit, 24 ...
... balance weight drive device, 31 ... elevator traveling detection device, 32a to 32d ... car side load detection device, 3
3 ... Microcomputer, 34 ... Input interface, 35 ... CPU, 36 ... ROM, 37 ...
RAM, 38 ... Output interface, 39 ... Balance weight drive device.

Claims (5)

[Claims] 1. A car-side load detection device that is installed at each of four corners between an underfloor of an elevator car and a base of a car frame and detects a car-side load, and moves between the car floor and the base of the car frame. If possible, move the load to adjust the center of gravity of the car load and adjust the center of gravity position of the car load and the car side load based on the load detection signals detected by the car side load detection devices. Detecting means for detecting the center of gravity and total load, and calculation for obtaining the moving position of the load based on the center of gravity and total load of the car side load detected by this detecting means and the suspension core position of the car given in advance An elevator comprising: means and control means for controlling the center-of-gravity position adjusting means by the position signal obtained by the calculating means to move the load load to the moving position. A tilt adjustment device. 2. The elevator car inclination adjusting device according to claim 1, wherein the detecting means takes in the load detection signal detected by each car side load detecting device on condition that the elevator is stopped, An elevator car inclination adjusting device, characterized in that a center of gravity of a load and a total load are obtained. 3. A car-side load detection device, which is installed at each of four corners between the floor of the elevator car and the base of the car frame, detects a car-side load, and is movably provided between the car floor and the base. The center of gravity of the car load is calculated based on the load detection signal detected by the car load center of gravity position adjusting means for adjusting the center of gravity of the car load by moving the load and the car side load detection device. Detecting means for detecting the center of gravity of the load and the load on the car side from the deviation between the point and the current position of the load, and the center of gravity of the load and the load on the car detected by this detecting means and the suspension core of the car. A calculation means for obtaining the moving position of the load load from the deviation from the position, and a resistor for limiting the position signal of the load load obtained by the calculation means to suppress the vibration generated during the operation of the gravity center position adjusting means. An elevator car tilt adjusting device comprising: a limiter; and a control unit that controls the center-of-gravity position adjusting unit by the position signal obtained through the limiter to move the load load to the moving position. 4. The elevator car tilt adjusting device according to claim 1, wherein the center of gravity position adjusting means for the car side load is two-dimensional in the X direction and the Y direction within a plane between the car floor and the base. Inclination of an elevator car, characterized in that a balance weight driving device for moving in the X and Y directions is provided, and a balance weight connected to the balance weight driving device and moving in the x direction and the y direction is provided. Adjustment device. 5. The elevator car inclination adjusting device according to claim 1, wherein the car-side load center-of-gravity position adjusting means has balance weights in the X direction and on each side between the underfloor of the car body and the base. The balance weights are arranged so as to be movable two-dimensionally in the Y direction, and among the balance weights of the respective side portions, the balance weights facing each other are moved linearly in the x direction or the y direction while keeping the facing distance constant. An elevator car tilt adjusting device, characterized in that a balance weight drive device is provided.