JP5602613B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus, and more particularly to an apparatus suitable for position detection when an emergency stop occurs.

  For example, if there are two types of position detection shielding plates with multiple types of shapes, it is necessary to install them alternately. If there is an artificial installation error such as an error during installation, an error will occur. It is necessary to have means for detecting.

  For example, Patent Document 1 has a position detection device that alternately generates a first pulse and a second pulse, and detects an error when the generation order of the above-described pulses becomes abnormal. A method has been devised to inhibit the occurrence.

Japanese Utility Model Publication No. 55-150305

  In the above prior art, a system is adopted in which two position detection pulse generators are used to increase the reliability of position detection, and generation of a pulse is prohibited when an abnormality is determined. However, in detecting the position of the elevator, there is a concern that the failure rate of the device itself is increased by having a plurality of pulse generators.

On the other hand, the position detection positive plate (registered trademark) on the elevator car side and the shielding plate for position detection corresponding to each floor position on the hoistway side are arranged directly on the landing zone and door zone of the elevator car. It is also known to detect. When the car stops in an emergency due to an abnormality in the elevator or a power failure, it can be stopped to the nearest floor using this positive detector and the shielding plate at a low speed after the stop.

  By the way, if the building where the elevator is installed becomes taller and the elevator speed becomes faster, the actual position of the elevator car will be one floor higher than the calculated value due to slippage between the rope and sheave and rope elongation during emergency stop of the elevator. There is a risk of causing an error that exceeds the distance. In this case, the nearest floor after an emergency stop is not known, and if the calculated value of the car position is emphasized, the nearest floor is erroneously recognized.

  The object of the present invention is to provide a highly reliable position by using the position detector and the shielding plate without using a dedicated absolute position detector or the like even in the event of an emergency stop due to an abnormality of the elevator or a power failure. It is to enable detection, thereby improving the reliability of the elevator apparatus.

The present invention corresponds to a car, a motor for raising and lowering the car via a rope, a counterweight suspended opposite to the car via the rope, and each floor on the hoistway side. An installed position detection shielding plate, and a position detection device that is attached to the car side and detects the position of the car facing the shielding plate, and travels the car after an emergency stop of the elevator. The position of the car is detected using the output of the position detection device obtained in the above, the feature is that the position of the car due to the emergency stop of the elevator and the subsequent travel is estimated, and the position There are a plurality of types of shielding plates with different shapes that can be identified by the detection device according to the estimation accuracy of the position of the car, and the plurality of types of shielding plates are alternately arranged between floors on the hoistway side. When it is determined that the shape of the shielding plate that should be in the range of the estimated position of the car matches the shape of the shielding plate that has passed in the travel after the emergency stop, the estimated car Is to match the position indicated by the passing shielding plate . Thus, by identifying the type of the shielding plate, it is possible to determine that an error more than that of the first floor has occurred during an emergency stop.

  Other features of the present invention are economically realized by using two types of shielding plates, which will be clarified in the following embodiments.

  According to the present invention, even if a shift occurs between the actual position of the car and the position data in the elevator controller due to an emergency stop of the elevator that occurs in the event of a power failure or abnormality, different types of shielding plates installed on the hoistway side are provided. By passing the vehicle, the absolute position of the elevator car can be detected, and a highly reliable elevator device can be realized.

Schematic which shows the whole structure of the elevator apparatus in one Example of this invention. Schematic of the elevator control apparatus in one Example of this invention Shape discrimination diagram of shielding plate in one embodiment of the present invention Flowchart of position detection when power failure occurs in one embodiment of the present invention

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of an elevator apparatus according to the present invention, and FIG. 2 shows an embodiment of an elevator control apparatus according to the present invention. As shown in FIG. 1, there is an elevator car 1, a motor 2 for driving the elevator, and a counterweight 3 installed at a position facing the car 1, each via a pulley 4 and a rope 5. It is connected. An encoder 6 is attached to the motor 2, and the pulse of the encoder 6 generated according to the rotation of the motor 2 is transmitted to the input / output buffer (I) shown in FIG. / O) 8 is taken into the position detector 10 in the microcomputer (MPU) 9 to detect the position of the car, and is taken into the speed detector 11 to detect the speed of the car.

  Further, a load amount detection device 12 is installed in the car 1, and a load amount detection unit in the MPU 9 receives data detected by the load amount detection device 12 via an I / O 8 inside the control device 7. 13 and the load amount of the car 1 is detected. Further, a positive detector 14 for detecting the position of the car 1 is attached to the upper part of the car 1, and position detecting shielding plates 15A and 15B having different shapes are provided on the hoistway side. Is installed. The detection signal from the positive detector 14 is detected by the shielding plate detection unit 16 in the MPU 9 via the I / O 8 inside the control device 7.

  FIG. 3 shows a shape discrimination diagram of the shielding plate. FIG. 3A shows an example of the shielding plate shape A, and FIG. 3B shows an example of the shielding plate shape B. The positive detector 14 is attached to the car 1 as shown in FIG. 1, and lights 1 to 3 indicate three optical axes that are transmitted and received toward the shielding plate. Depending on the position where the positive detector 14 and the shielding plates 15A and 15B face each other, the optical axes of the light beams 1 to 3 take the ON / OFF state shown in the figure. Both the shielding plates 15A and 15B are all “ON” in the center landing zone, but the detection modes of the optical axes 1 to 3 are different in the front and rear door zones. By using such two types of shielding plate shapes, even when the shielding plate 15 and the positive detector 14 start to bite from either the UP direction or the DN direction, the shielding plate is detected from the ON / OFF signal of the positive detector 14. Type and direction can be discriminated.

  For example, when the shielding plate shape A and the positive detector 14 start to bite from the lower side, the ON / OFF state of the optical axis is ON / OFF / ON in order from the optical axis 1 until it travels a certain distance. Next, when the shielding plate shape B and the positive detector 14 start to bite from the lower side, the ON / OFF state of the optical axis becomes ON / OFF / OFF in order from the optical axis 1, and after moving a certain distance, the shielding plate shape A ON / OFF / ON which are the same signal states as in FIG. The shielding plate shape A or B is determined using the difference in the ON / OFF signals of the optical axes 1 to 3 from when the positive detector 14 starts to bite the shielding plate 15 until it travels a certain distance. Further, the amount of change in shape is determined by the moving speed of the car 1 until detection and the period of the MPU 7 that takes in the signal of the positive detector 14.

  FIG. 4 shows a position detection flowchart when a power failure occurs in one embodiment of the present invention. Here, a flowchart from the occurrence of a power failure until the position of the car 1 is detected and arrives at the door zone of the nearest floor is shown. ing. Needless to say, not only a power failure but also an emergency stop due to an abnormality or the like can be similarly implemented.

  First, it is assumed that the elevator starts traveling (S1), a power failure or the like occurs during the traveling, and the elevator stops emergency (S2). At this time, the position detection unit 10, speed detection unit 11 and load amount detection unit 13 in the MPU 9 of the elevator control device respectively store the position, speed and load amount of the elevator before stopping and store each data before the occurrence of the power failure. Save (S3).

  Thereafter, when the elevator recovers (S4), the elevator stop position at the time of emergency stop is estimated by calculation based on the stored elevator position, direction, speed, and load before stopping (S5). Subsequently, the vehicle starts traveling at a low speed toward the door zone of the nearest floor (S6), and continues to estimate the car position by counting the traveling pulses from the encoder 6 (S7).

After passing through the shielding plate (S8), it is determined whether the passing shielding plate is in shape A (S9) or shape B (S10). As a result of the determination, if it is determined that neither corresponds, neither the current position of the elevator can be detected, the elevator is driven to the end floor where the absolute position can be detected, and the operation is terminated (S11).

  When it is determined that the shape of the shielding plate that should be in the estimated position of the car (+ allowable range) matches the shape of the passing shielding plate, the car position detection unit 10 of the elevator control device 7 determines the car position. It is made to correspond with the position which a board shows (S12). Therefore, even if an error corresponding to the first floor occurs in the estimated position of the car due to rope slipping or the like at the time of emergency stop, it is possible to appropriately detect the car position by determining the shape of the shielding plate. Thereafter, the vehicle stops at the door zone and ends the operation (S12).

Here, for devices that have low position estimation accuracy during an emergency stop and are concerned about errors in the second floor or the third floor or more, prepare the number of types of shielding plates according to the worried floor error. ,
This can be handled by arranging them alternately at the corresponding positions on the hoistway side.

DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Motor, 3 ... Balance weight, 4 ... Pulley, 5 ... Rope, 6 ... Encoder, 7 ... Control device, 8 ... Input / output buffer (I / O), 9 ... MPU, 10 ... Position detection , 11 ... Speed detector, 12 ... Load detector, 13 ... Load detector, 14 ... Positive detector, 15A ... Shield plate shape A, 15B ... Shield plate shape B, 16 ... Shield plate detector

Claims (2)

Positions installed corresponding to each floor on the hoistway side, a motor for raising and lowering the car via a rope, a counterweight suspended opposite to the car via the rope, and a car A detection shielding plate and a position detection device that is attached to the car side and detects the position of the car facing the shielding plate, and is obtained by running the car after an emergency stop of the elevator In an elevator apparatus that detects the position of a car using the output of the position detection apparatus ,
Estimating the position of the elevator car due to the emergency stop of the elevator and the subsequent traveling,
The shielding plate having different shapes that can be identified by the position detection device has a plurality of types according to the estimation accuracy of the position of the car, and the plurality of types of the shielding plates are provided between floors on the hoistway side. Alternately
When it is determined that the shape of the shielding plate that should be in the range of the estimated position of the car matches the shape of the shielding plate that has passed in the travel after the emergency stop, the estimated position of the car In accordance with the position indicated by the passing shielding plate . The means for storing the speed, position and load of the car at the time of emergency stop, and means for estimating the car stop position at the time of emergency stop from the speed, position and load of the car according to claim 1. elevator apparatus characterized in that it comprises and.

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