JP6419638B2 - Car elevator - Google Patents

Description

  The present invention relates to a rope-type two-car elevator.

  Two car elevators are known in which two cars are connected by a main rope, a hoisting machine is provided between the two cars, and both cars are moved up and down simultaneously. Patent Literature as a conventional technology that eliminates the point that when the main rope of both car elevators grows due to aging, when the floor of one car is aligned with the floor, the floor of the other car does not fit the floor 1 is known. This Patent Document 1 describes that the extension of the main rope is adjusted so that the floor surfaces of both the cars when the passenger is not riding are aligned with the floor surface.

JP 2004-338830 A

  Patent Document 1 describes a device that adjusts the amount of elongation of the main rope, but the elongation of the main rope expands and contracts not only due to secular change but also due to the load (passenger). For this reason, even during normal service, a phenomenon occurs in which the floor of the car and the floor do not match.

  An object of the present invention is to match the floor levels of two cars when the car arrives at the floor during normal service in a two-car elevator.

In order to achieve the above object , a typical car elevator according to the present invention is a car elevator in which a car is installed on both sleeves of a main rope with respect to one hoisting machine. Hydraulic jack for adjusting, hydraulic jack driving device for driving the hydraulic jack, hoisting device driving device for driving the hoisting machine, and car position for controlling the hydraulic jack driving device and the hoisting device driving device A control device; a car position detection device that detects the absolute position of the car; and a reference position detection device that detects, as a reference position, a position at which the car is stopped on a destination floor. After measuring the amount of deviation of the car from the reference position associated with passengers getting on and off the destination floor, the hoisting machine driving device is controlled to move both the cars to the destination floor. During which movement is characterized by moving by the amount the main rope that corresponds to the shift amount from the reference position by controlling the hydraulic jack drive unit in a vertical direction.

  According to the present invention, in the two-car elevator, when the car arrives at the floor during normal service, the floor levels of the two passenger cars can be matched.

Schematic diagram of the entire car elevator. The figure which shows the structure of a rope end hydraulic jack and a hydraulic jack drive device. The block diagram of the control part of a car position control apparatus. The control flowchart. An example of the operation of the elevator.

  A configuration and a control method of a car position control apparatus as an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of the entire car elevator, and FIG. 2 is a diagram showing a configuration of a rope end hydraulic jack and a hydraulic jack driving device according to the present invention. FIG. 3 is a block diagram showing a control unit of the car position control apparatus according to the present invention, and FIG. 4 is a flowchart of control executed by the control unit. FIG. 5 shows an example of the operation of the elevator according to the conventional control and the control of the present invention along the time series.

  Generally, a lift elevator using a rope supports a car and a counterweight through a rope hung on a hoisting machine. In recent years, from the viewpoint of improving transportation efficiency, there has been proposed an elevator of a type in which a car is installed instead of a counterweight and two cars are moved by one hoisting machine (hereinafter referred to as a double car elevator). In these two-car elevators, the respective cars operate symmetrically. When one car is rising, the other car is lowered, and when one car is located on the top floor, the other car is located on the bottom floor.

  In the two-car elevator having such a configuration, it is necessary to design an entrance / exit in consideration of a symmetrical operation (floor height, etc.), but even when designed in such a way, it is affected by the expansion and contraction of the main rope. In such level adjustment when both car elevators arrive at the floor, there is a problem that it is very difficult to adjust the floor levels of both cars at the same time due to the expansion and contraction of the main rope. Rope expansion and contraction occurs due to loading load and secular change, and the amount of displacement ranges up to several tens of millimeters. It is essential to provide means for matching the floor levels of both cars at the same time so as not to cause such level differences upon arrival. Even if it adjusts with respect to the extension of the main rope in the situation where a passenger is not riding like patent documents 1, if one car floor level is adjusted by the weight by the passenger riding, the other car's There may be steps on the car floor level. Thus, in both car elevators, there is a problem that it is difficult to match both car floor levels at the time of arrival, and elevator position control is desired to improve this. Hereinafter, an embodiment in which this point is improved will be described.

  A schematic diagram of the entire car elevator in this embodiment is shown in FIG. The two-car elevator is an elevator that has improved transport capacity by installing a car instead of a counterweight. It becomes possible to operate the two cars 102 and 103 with one hoisting machine 101. The two cars 102 and 103 have symmetrical operations and positional relationships, respectively, and it is necessary to design the entrance / exit height in consideration of such symmetrical operations.

  In the present embodiment, a description will be given by taking as an example a shuttle elevator that can get on and off on the top floor or the bottom floor of both cars. As shown in FIG. 1, one car 102 is called a car A, and the other car 103 is called a car B. A main rope end hydraulic jack 104 is installed at the main rope end on the side supporting the car B103.

The hoisting machine 101 is provided with a brake device (not shown) that brakes the hoisting machine other than the motor. At least one of the cars is provided with a governor device for detecting an abnormal speed of the car. The governor device is provided below the lower floor with the governor pulley provided in the machine room, and a governor rope is looped between the governor pulley and a part of this governor rope is fixed to the cage for moving the cage. Along with this, the governor rope also moves, and an abnormal speed is detected by a governor pulley provided in the machine room. In this embodiment, an encoder is installed on the shaft of a governor pulley provided in the machine room in order to detect the extension of the main rope hanging the car.

  When the governor device is installed only on one car, the car position detection device on the other car is provided with a detection pulley in the machine room and a detection pulley below the lowest floor. The detection rope is provided and a part of the detection rope is fixed to the car. Similarly, an encoder for detecting the position of the car is provided on the shaft of the detection pulley provided in the machine room. Of course, when the governor device is provided in both the cars, the above-described governor device may be used instead of the car position detecting device.

  In this embodiment, a governor device, a detection pulley for position detection, and an encoder are used to grasp the position of the car. However, the present invention is not limited to this, and any other device can be used as long as it detects the absolute position of the car. can do.

  Each car is provided with a floor board detector using light or magnetism, and a floor board is installed on each floor. When the car moves and the floor board interrupts the floor board detector, the car has reached that floor. This is also used for normal floor height correction, but in this embodiment, it determines the reference position (absolute position) of the car, which will be described later, and is used to detect the extension of the main rope from this absolute position. However, other devices can be used as long as they determine the reference position of the car.

  An embodiment in which the extension of the main rope is detected and adjusted using the apparatus as described above will be described below.

FIG. 1 shows a state where the car A102 is stopped on the top floor and the car B103 is stopped on the bottom floor . In this embodiment, the car position represents the vertical distance from the lowest floor level to the car level, the car position of the car A is represented by X, and the car position of the car B is represented by Y. In addition, a vertical distance (stroke) from the lowest floor level to the highest floor level is represented by L.

Next, the configuration of the car rope end hydraulic jack according to the present embodiment is shown in FIG. The rope end hydraulic jack 104 is a device that moves the rope end supporting one car in the vertical direction, and is installed at the rope end 201 on the side supporting the car B103. The hydraulic jack 104 can be expanded and contracted in the vertical direction, and its operation can be controlled by the hydraulic jack driving device 202. By operating the rope end hydraulic jack 104, the car position of the car B103 can be adjusted. For example, when the hydraulic jack 104 is raised while the elevator hoisting machine 101 is stopped (the brake device of the hoisting machine 101 is operating), the car is moved according to the amount of movement of the hydraulic jack 104. B103 rises. The object of the present invention is to correct the level shift caused by the aging and the rope expansion / contraction due to the loading load. Therefore, the maximum correction amount may be the maximum movement amount (stroke) of the hydraulic jack 104. A size of about 200 mm is assumed. However, since the 2: 1 roping is performed in this embodiment, the movement amount of the car B103 is half of the movement amount of the hydraulic jack 104.

Subsequently, FIG. 3 shows a block diagram of the car position control of the two-car elevator in the present embodiment. Both the car elevators include detectors 301 and 302 that detect the respective car positions, and the car position information is input to the car position control device 303. The car position control device 303 includes a hydraulic jack drive control unit 304 and a hoisting machine drive control unit 305, and each control unit controls the hoisting machine 101 and the rope end hydraulic jack 104 based on the respective car position information. The command is output to the hoisting machine driving device 306 and the hydraulic jack driving device 202.

  FIG. 4 shows a control flowchart of the car position control device 303 in the two-car elevator service operation of this embodiment. Assume that the position of the car A102 is X, the position of the car B103 is Y, the distance between the uppermost floor level and the lowermost floor level is L, and the position of the destination floor of the car A102 is D. Due to the nature of the car elevator, the position of the destination floor of the car B103 is determined as (LD). Car position control after determination of the destination floor of the car A102 or after determination of the destination floor of the car B103 will be described. First, the hoisting machine drive control unit 305 will be described. The hoisting machine drive control unit 305 controls the hoisting machine 101 so that X = D. By this control, the car level X of the car A 102 matches the destination floor level D.

  Next, the hydraulic jack drive control unit 304 will be described. In the hydraulic jack drive control, the hydraulic jack 104 is driven and controlled so that (X + Y) = L. By this control, the influence of main rope expansion and contraction is corrected. As a result, when the level X of the car A102 becomes D = D, the level Y of the car B103 matches the destination floor level (LD) of the car B. Since these two car position control systems are independent, they can be driven simultaneously. The rope end hydraulic jack 104 is driven while both the cars are moving by driving the hoisting machine 101. The movement amount of the rope end hydraulic jack 104 is several tens of millimeters, and the operation time thereof is sufficiently shorter than the operation time of the hoisting machine 101. Therefore, when the operation of the hoisting machine 101 is completed, the operation of the rope end hydraulic jack 104 is performed. Completed. By such a series of operations, it becomes possible to adjust the levels of both cars at the time of arrival.

  Next, it demonstrates concretely using FIG. An example of the operation of the elevator is described along the time series while comparing the case where the control according to the present embodiment is applied and the case where the control is not applied. The initial state is a state where neither the car A 102 nor the car B 103 has passengers, the car A 102 is waiting at the top floor level, and the car B 103 is waiting at the bottom floor level.

  From this state, it is assumed that a passenger enters the car B103, rope expansion occurs due to an increase in the load, and the car level of the car B103 becomes the lowest floor level minus 20 millimeters. In this state, consider the operation when the destination floor of the car B103 is set to the top floor.

  First, consider the case where this embodiment is not applied. Control is performed to move the car position X of the car A102 to the position of the lowest floor level 0 by driving the hoisting machine. As a result, the car B103, which becomes a symmetrical operation, moves to the position of the top floor level (L-20). In the control in the case where the present embodiment is not applied, the deviation of the level of the car B103 minus 20 millimeters cannot be corrected. With the car position control only by the hoisting machine drive, both cars cannot be adjusted to the level at the same time.

  Next, a case where the present embodiment is applied will be described. As the car position detecting device, the car A102 is provided with a governor device, and the car B103 is provided with a car position detector. Prior to the initial state, the car B descends from the top floor and the floor board detector detects that it has arrived at the bottom floor on the bottom floor. This position is set as a reference position. Simultaneously with this detection, the number of rotations of the encoder attached to the governor device is counted. When the control according to the present embodiment is executed, the vehicle stops at the position where the floor board is detected even when the passenger is on the vehicle. At this time, the brake device of the hoisting machine operates to apply the brake. When the passenger descends, the main rope contracts, so the car rises and the floor board is not detected. . The number of rotations of the encoder when the door starts to close is the amount of extension of the main rope due to the current passenger getting on from the reference position.

  When the destination floor is determined, the brake device is deactivated and the hoisting machine rotates, the car B103 is raised and the car A is lowered. Then, by extending the rope end hydraulic jack 104 by the length corresponding to the main rope extension amount, 20 mm in this example, the main rope extension amount is adjusted at the time of arrival at the top floor, and both cars Stops at level.

  Although the above demonstrated the case where a passenger boarded only in car B103, the case where it boarded also car A102 is explained. As described above, the extension amount of the main rope on the car B103 side with the brake device interposed therebetween can be measured. The amount of elongation at this time is ΔLB.

  The car A102 will be described. Prior to the initial state, the car A102 moves from the lowest floor to the highest floor. Upon arrival at the top floor, the floor board detector attached to the car A 102 detects the top floor board. Even when a passenger is on board, if the control according to this embodiment is working, the car A102 stops at the position where the floorboard is detected. From this point, the coefficient of the encoder provided in the car position detector is started. When the passenger gets off, the main rope on the car A102 side contracts from the brake device, but extends again when the passenger gets in. When passengers do not get on or when the number of passengers is small, they are in a contracted state, but since they are counted by the encoder, the amount of contraction can also be measured (the same applies to the car B103).

  The value of the encoder when the destination floor is determined and the door is closed is defined as the main rope extension amount (shrink amount) ΔLA in the current number of passengers. Both ΔLA and ΔLB can be considered as deviation amounts from the reference position due to expansion and contraction of the main rope.

  The hydraulic jack drive control device 304 calculates ΔLA + ΔLB = ΔL, and expands and contracts the rope end hydraulic jack 104 by an amount corresponding to ΔL (extends the jack when the main rope is extended compared to the previous operation and contracts when the main rope is contracted). Thus, the above-described X + Y = L is realized. This operation may be in a state where the hoisting machine is moving or stopped.

  As a result, the level of the car A102 matches the lowest floor level, and the level of the car B103 matches the top floor level. Thus, whenever the car is operated, the rope end hydraulic jack 104 is operated to adjust the expansion and contraction of the main rope, so that the floor levels of the two cars can be adjusted simultaneously. Moreover, since the expansion and contraction of the main rope is adjusted for each service of the car, the main rope elongation due to secular change is naturally adjusted.

  DESCRIPTION OF SYMBOLS 101 ... Hoisting machine, 102 ... Car A, 103 ... Car B, 104 ... Rope end hydraulic jack, 201 ... Rope end, 202 ... Hydraulic jack drive device, 301 ... Car position detector of car A, 302 ... Car B car position detector, 303 ... car position control device, 304 ... hydraulic jack drive control unit, 305 ... hoisting machine drive control unit, 306 ... hoisting machine drive device.

Claims (3)

In a car elevator where a car is installed on both sleeves of the main rope for one hoist,
Hydraulic jack for adjusting expansion / contraction of the main rope, hydraulic jack driving device for driving the hydraulic jack, hoisting machine driving device for driving the hoisting machine, hydraulic jack driving device, and hoisting machine driving A car position control device that controls the device, a car position detection device that detects the absolute position of the car, and a reference position detection device that detects a position at which the car is stopped on the target floor as a reference position,
The car position control device measures the amount of deviation of the car from the reference position associated with passengers getting on and off at the destination floor, and then controls the hoisting machine driving device to control both the car A double car elevator characterized in that, during the movement to the floor, the hydraulic jack drive device is controlled to move the main rope in the vertical direction by an amount corresponding to the amount of deviation from the reference position . In the car elevator according to claim 1 ,
The car position detecting device is a governor device provided in at least one of the cars. In the car elevator according to claim 1,
The car position elevator includes a floor board installed on each floor and a floor board detector provided on both of the cars.