JP5501268B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus, and more particularly to an elevator apparatus that can reliably and easily detect the position of a car during a power failure.

In an elevator that services a plurality of floors, the position of the car is always detected with high accuracy by counting pulses from a pulse generator provided in a driving unit of the car. Even when there is a power failure in the elevator equipment, detecting the position of the car is extremely important.
For example, Patent Document 1 describes that an absolute value type rotary encoder is used to detect a position so as not to lose sight of the elevator car position during a power failure.

  Furthermore, Patent Document 2 describes an apparatus that detects a car position using a power outage position calculation that calculates a stop position or a stop floor of a car at the time of a power outage. Patent Document 3 describes a shielding plate and a photoelectric sensor. There has been proposed a position detection device for detecting that the car is close to the terminal floor using the.

JP-A-5-147847 JP-A-11-79585 Japanese Patent No. 4485960

  In the past, when a power failure occurred, it was known to predict and calculate the stop position of the car from the driving direction data, car speed data, car load data, floor pitch data, etc. Since a rope slip or the like also occurs due to the stop operation at the time of a power failure, the car position cannot be specified only by the prediction calculation.

  Therefore, the absolute value type rotary encoder and the like have to be installed so that the car position is not lost in any case and can be detected with high reliability.

  An object of the present invention is to provide an elevator apparatus that can easily detect a car position at the time of a power failure with high reliability without installing an expensive absolute value type rotary encoder or the like.

The object of the present invention to achieve the elevator car to service multiple floors, a pulse generator for generating pulses corresponding to the running of the car, power failure the elevator equipment, stopping of the car In an elevator apparatus including a stop position prediction calculation unit that predicts a floor , the feature thereof is that three types of shielding plates having different shapes installed corresponding to three adjacent floors, and the shielding A car position detector that identifies and detects the three types of shapes facing the plate, and a car position signal from the stop position prediction calculation unit and the car position detector at the time of a power failure of the elevator equipment and a squirrel position confirmation unit to confirm the position of the car, said car position confirmation section, the stop floor of the car predicted by the stop position prediction calculation unit, the car position detection If it matches with the floor of the shielding plate detected by the vessel, the predicted stop floor is the current car position, and if not, according to the floor of the shielding plate detected by the cage position detector, The expensive absolute value type rotary encoder or the like is not necessary by setting the predicted floor one above or below the stop floor as the current car position .

  In order to achieve the above object, the present invention further proposes a configuration in which a detector integrated with three optical axes and three kinds of shielding plates are combined as a position detector at the time of a power failure. This will be clarified in the embodiment.

  According to the present invention, it is possible to reliably and easily detect the elevator car position during a power failure without using an expensive device such as an absolute value type rotary encoder.

1 is an overall configuration diagram of an elevator apparatus according to an embodiment of the present invention. It is a principal part enlarged view of a position detector and a shielding board shown in FIG. It is a block block diagram of the car position detection apparatus shown in FIG.

An embodiment of the present invention will be described with reference to an example.
First, FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of a shielding plate and a position detector.

  In these drawings, 1 and 2 are a car and a counterweight suspended in a sheave shape on a sheave via a rope in a hoistway, 3 is a sheave connected to an electric motor via a speed reducer, and 4 is an electric motor. A pulse generator that is connected to a shaft and generates pulses proportional to the driving direction and travel distance of the car 1, 5 is a car position detector mainly composed of a microcomputer, and 6 is attached to each floor to be described later. The three optical axis integrated position detectors 7A, 7B, and 7C that detect the shielding plates 7A, 7B, and 7C and output the floor to the car position detection device 5, are arranged on the rails in the hoistway between the three floors. It is a shielding plate that is installed over and can identify each floor. As shown in the figure, the three kinds of shielding plates have different shapes (lengths in the embodiment), and the car position detector 6 identifies the shape (length in the embodiments) to identify the floor. Like to do.

  That is, the car position detector 6 forms three optical axes with respect to the shielding plates 7A, 7B, and 7C by the light projecting units 10A to 10C and the light receiving units 11A to 11C, as shown in FIG. Thus, all three optical axes are shielded (FIG. 2 (a)), only two optical axes are shielded (FIG. 2 (b)), and only one optical axis is shielded (FIG. 2 (c)). The shielding plates 7A, 7B, 7C are identified so that their floors can be identified.

  8 is a power source for supplying an AC voltage, 9 is a constant voltage power source device for supplying a DC constant voltage to the car position detecting device 5, 10 and 11 are a light projecting unit and a light receiving unit of a three-optical axis integrated position detector. It is.

  In FIG. 1, in the elevator apparatus, when the car 1 moves up and down, a pulse generator 4 detects a pulse signal related to the moving distance and moving direction of the car 1. The detected pulse signal is input to the car position detection device 5, where a predetermined calculation process is performed, and the calculation result floor and the shielding plates 7A, 7B, 7C detected by the car position detector 6 are the same. Check if it is.

The car position detection device 5 is supplied with AC voltage from the power source 8 to the constant voltage power source device 9. Here, the constant voltage power supply device 9 does not normally lose the DC constant voltage as the output voltage immediately after a power failure. That is, the DC constant voltage starts to decrease after a predetermined time has elapsed since the occurrence of a power failure. This power holding time varies depending on the load capacity of the constant voltage power supply device 9, but usually has a time of several picking up msec to several hundred msec.

In this embodiment, by utilizing this power retention time is predicted by calculating the stop floor after the stop position and the power recovery of the car at the time of power failure, the shielding plate 7 that is installed on each floor after power returns The car position detector 6 detects the correct floor.

  Next, functions and operations of the car position detection device 5 will be described with reference to the block diagram of FIG. In FIG. 3, reference numeral 51 denotes a car position calculation unit that constantly calculates the position of the car 1 while the power supply 8 is normal, and outputs the position data to a car position confirmation unit 59 described later, and 52 indicates that the power supply 8 is normal. At the time of the car, the car position data output from the car position calculation unit 51 is input and output to the car position confirmation unit 59. At the time of a power failure, the car 1 stopped from the stop position prediction calculation unit 57 at the time of power failure described later It is a switching unit that performs switching control so that position data is input and output to the car position confirmation unit 59.

  53 is a driving direction input unit that obtains and outputs driving direction data 531 relating to the ascending or descending direction of the car 1 that is operating from an elevator speed control device or the like (not shown), and 54 is the same as the elevator speed control device or the like. A speed input unit 55 obtains and outputs the speed data 541 of the car 1 operating from the apparatus, and 55 is a floor pitch data storage unit that stores pitch data 551 between the floors.

56 is provided in the car 1 and obtains and outputs load data 561 in the car detected by a weighing scale or the like, and a car load input part 57 outputs car position data 511 output from the car position calculation part 51. Based on the driving direction data 531, the speed data 541, the floor pitch data 551, and the car load data 561, the stop position prediction at the time of power failure that predicts and calculates the stop position of the car 1 at the time of power failure and the stop floor after power recovery It is a calculation part.

  58 is a power failure detection unit that outputs a switching signal to the switching unit 52 when a power failure of the power source 8 is detected. 59 is a car position data output from the car position calculation unit 51 and a floor of the shielding plate 7 detected by the car position detector 6. It is a car position confirmation unit that confirms whether the floor is the same. Other configurations are the same as those shown in FIG. 1, and therefore, the same reference numerals are given and description thereof is omitted.

  When the power supply 8 is functioning normally, the driving direction and moving distance of the car 1 are detected from the pulse generator 4 and input to the car position calculation unit 51. The car position calculation unit 51 always calculates the current position of the car 1 based on the detected data, and outputs the position data to the car position confirmation unit 59 via the switching unit 52. It is confirmed whether or not the floors of the shielding plates 7A, 7B, and 7C detected by the position detector 6 are in alignment.

On the other hand, when the AC power supply 8 is functioning normally, the stop position prediction calculation unit 57 at the time of a power failure also displays current car position data 511, operation direction data 531, speed data 541, floors, and the like input from the car position calculation unit 51. Based on the floor pitch data 551 and the car load data 561, the stop position where the car 1 is predicted to stop when a power failure occurs is always calculated and the stop floor after power recovery .

When the power supply 8 fails, the power failure detection unit 58 detects the power failure and switches the switch of the switching unit 52 from the car position calculation unit 51 side to the stop position prediction calculation unit 57 side at the time of power failure. When the power supply 8 is functioning normally, the stop position prediction calculation unit 57 at the time of power failure calculates the predicted stop position at the time of power failure and the stop floor after power recovery. Since the power holding time is about several msec to several hundred msec, the predicted position data is output from the stop position prediction calculation unit 57 at the time of power failure using this time.

The predicted position data is input to the car position confirmation unit 59 via the switching unit 52. After the power recovery, if the car is stopped between the floors, after driving to the nearest floor, the stop floor predicted by the stop position prediction calculating unit 57 at the time of power failure is detected by the car position detector 6A. , 7B, 7C Check if it is the same floor. If the detected shielding plates 7A, 7B, and 7C coincide with the stop floor predicted by the stop position prediction calculation unit 57 at the time of power failure, the floor is set as the current car position.

  If the detected shielding plates 7A, 7B, and 7C are different from the stop floor predicted by the stop position prediction calculation unit 57 at the time of power failure, the position cannot be determined only by the calculation of the stop position prediction calculation unit 57 at the time of power failure. This is because an error may be included in the stop floor predicted by the stop position prediction calculation unit 57 during a power failure due to the occurrence of a rope slip or the like.

  However, it is unlikely that the rope slip will be more than that of the first floor due to the stopping operation at the time of power failure. That is, it cannot be considered that the stop floor predicted by the stop position prediction calculation unit 57 at the time of a power failure causes an error that exceeds the second floor.

  Therefore, when a shielding plate 7 different from the predicted shielding plate 7 of the floor is detected, it is set as the upper floor or the lower floor of that floor. That is, the shield plate 7A, 7B, 7C detected by the detected shield plate 7A, 7B, 7C, or the shield plate 7A, 7B, 7C installed on the upper floor of the stop floor, or the shield plate installed on the next lower floor. 7A, 7B, 7C, and if it is the shielding plate 7A, 7B, 7C installed on the upper floor, the upper floor of the predicted stop floor is the current floor, and the lower floor is If the shielding plates 7A, 7B, and 7C installed at 1 are located, the one floor below the predicted stop floor is determined as the current floor.

  Thus, when judging the upper floor or the lower floor, in the present invention, since the shape of the shielding plate 7 is different between adjacent floors, there is no possibility of misjudging. You can be sure of the correct floor.

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Counterweight 3 ... Sheave 4 ... Pulse generator 5 ... Car position detector 6 ... Car position detector 7, 7A, 7B, 7C ... Shielding plate 8 ... AC power supply 9 ... Constant voltage power supply device 10, 10A to 10C ... Light projecting unit 11, 11A to 11C ... Light receiving unit 51 ... Car position calculation unit 52 ... Switching 53: Driving direction data input unit 54 ... Speed data input unit 55 ... Floor pitch data storage unit 56 ... Car load data input unit 57 ... Stop position prediction calculation unit 58 during power failure ... Power failure detection part 59 ... Cage position confirmation part

Claims (3)

And elevator car to service multiple floors, a pulse generator for generating pulses corresponding to the running of the car, power failure the elevator equipment, and the stop position prediction calculating unit that predicts a stop floor of the car In an elevator apparatus equipped with
Three types of shielding plates with different shapes installed corresponding to the three adjacent floors,
A car position detector that identifies and detects the three types of shapes facing the shielding plate;
A car position confirmation unit for confirming the position of the car using a car position signal from the stop position prediction calculation unit and the car position detector at the time of a power failure of the elevator equipment ;
The car position confirmation unit
If the stop floor of the car predicted by the stop position prediction calculation unit matches the floor of the shielding plate detected by the car position detector, the predicted stop floor is the current car position, If they do not match, the current car position is the one floor above or one floor below the predicted stop floor according to the floor of the shielding plate detected by the car position detector. An elevator apparatus characterized by that .   The elevator apparatus according to claim 1, wherein the car position confirmation unit includes the stop position prediction calculation unit and the car position detector when the car is driven to the nearest floor during a power failure of the elevator facility. An elevator apparatus characterized by confirming the position of the car using a car position signal from the car.   2. The elevator apparatus according to claim 1, wherein the car position detector includes at least three sets of light emitting / receiving elements, and the three types of shielding are formed by three optical axes formed by the three sets of light receiving / emitting elements. An elevator apparatus characterized by identifying and detecting the shape of a plate.

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