CN113874310B - Elevator installation - Google Patents

Abstract

The invention provides an elevator device capable of detecting an openable door position with high reliability. The elevator equipment comprises a position detection device and a safety controller for outputting a signal indicating whether the elevator equipment is at an openable door position, wherein the position detection device comprises a first position detection part (1) provided with a first detected body and a first position detector which are arranged at positions corresponding to floor ground positions and a second position detection part (3) for detecting absolute positions, and the safety controller is provided with a database (21) for storing data of the openable door position; an abnormality determination unit (23) for determining an abnormality in the second position detection unit; and a openable door position output unit (22) that outputs a signal indicating whether or not the openable door position is present based on a determination result of whether or not the output of the second position detection unit is within the range of the data of the openable door position when there is no abnormality, and outputs the output signal of the first position detection unit as the signal indicating whether or not the openable door position is present when there is an abnormality.

Description

Elevator installation

Technical Field

The invention relates to an elevator installation with a position detection device.

Background

In an elevator apparatus, a landing door is opened and closed in conjunction with a car door. At this time, a position detection device is used to detect a position where the door can be opened. The position detection device is composed of a detection object provided in a hoistway and a position detector (sensor) provided in a car for detecting the detection object. For example, as the position detection device, a photoelectric sensor and a light shielding plate are used.

Such a position detecting device is applied to a safety device for preventing a car from moving from an openable door position in an open door state.

As a conventional technique relating to such a position detection device, techniques described in patent documents 1 and 2 are known.

In the technique described in patent document 1, a magnet formed in a module shape is attached to a lower portion of a sill of a landing door, and a position where the door can be opened and closed is detected by a sensor disposed below a car.

In the technique described in patent document 2, when a position detector that detects a detected body provided on each floor has failed, a pulse generator (governor encoder) provided in a governor mechanism is used to detect an openable position.

Documents of the prior art

Patent document

Patent document 1: japanese unexamined patent publication No. 11-246139

Patent document 2: international publication No. 2017/168619

Disclosure of Invention

Problems to be solved by the invention

However, in the technique described in patent document 1, when an abnormality occurs in the position detection device, the openable door position cannot be detected, the reliability of the operation control of the elevator is lowered, and it is difficult to continue the operation of the car.

In the technique described in patent document 2, when the position detector fails, the pulse generator is used instead of the position detector, but when a position detection error occurs in the pulse generator, the reliability of the detected openable door position is lowered.

Accordingly, the present invention provides an elevator apparatus having a position detection device capable of detecting an openable door position with high reliability.

Means for solving the problems

In order to solve the above problem, an elevator apparatus according to the present invention includes: a position detection device for detecting the position of the car in the hoistway; an elevator controller for controlling the operation of the cage; and a safety controller independent of the elevator controller that outputs a signal indicating whether or not it is an openable door position for control by the elevator controller based on an output of the position detecting device, the position detecting device including: a first position detection unit having a first detected object disposed at a position corresponding to a floor surface position in a hoistway and a first position detector for detecting the first detected object; and a second position detection unit that detects an absolute position of the car in the hoistway, the safety controller including: a database for storing data of the openable door position; an abnormality determination unit that determines whether or not there is an abnormality in the second position detection unit based on an output of the second position detection unit; and an openable door position output section that, when the abnormality judgment section judges that there is no abnormality, judges whether or not the output of the second position detection section is within the range of the data of the openable door position, and outputs a signal indicating whether or not the openable door position is present based on the judgment result, and when the abnormality judgment section judges that there is an abnormality, outputs the output signal of the first position detection section as a signal indicating whether or not the openable door position is present.

Effects of the invention

According to the present invention, the openable door position can be detected with high reliability.

Drawings

Fig. 1 is an overall configuration diagram of an elevator apparatus according to an embodiment.

Fig. 2 is a block diagram showing a functional configuration of a safety controller according to the embodiment.

Fig. 3 is a timing chart showing an example of an output signal of the first position detector during the measurement operation.

Fig. 4 is a timing chart showing an example of output signals of the first position detector and the second position detector.

Fig. 5 is a configuration diagram of the DB21 (database).

Fig. 6 is a flowchart showing the DB generation process executed by the openable position generation unit.

Fig. 7 is a flowchart showing the openable position setting process executed by the openable position generating unit.

Fig. 8 is a flowchart showing an abnormality determination process of the second position detector executed by the abnormality determination unit.

Fig. 9 is a diagram showing an example of a change with time in the measurement result of the floor surface position.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals denote the same constituent elements or constituent elements having similar functions.

Fig. 1 is an overall configuration diagram of an elevator apparatus according to an embodiment of the present invention.

As shown in fig. 1, a sheave 104 and a guide wheel 105 are provided in an upper portion of a hoistway in a building. The main rope 101 is wound around the sheave 104 and the guide pulley 105. To one end and the other end of the main rope 101, a car 100 and a counterweight 113 are connected, respectively. The car 100 and the counterweight 113 are suspended in the hoistway by the main rope 101.

When the sheave 104 is rotationally driven by the motor 106 supplied with power from the power converter 108, the main rope 101 is linearly driven. Thereby, the car 100 and the counterweight 113 are raised and lowered in opposite vertical directions to each other in the hoistway. In this case, the car 100 moves between a plurality of floors in the hoistway. When the car 100 stops at a target floor, a car door 112 provided in the car 100 mechanically engages with a landing door 111 provided in a landing 115. Thus, the car door 112 and the landing door 111 are driven to open and close together by a door driving device (not shown) provided in the car 100.

In addition, a pulse generator 107 is installed in the motor 106. The pulse generator 107 generates a pulse signal in accordance with the rotation of the motor 106. Further, as the pulse generator 107, for example, a rotary encoder, a synchroresolver, or the like can be applied. The pulse signal output from the pulse generator 107 is input to the elevator controller 109. The elevator controller 109 counts the pulse signals to calculate the speed of the motor 106, the equivalent position and moving distance of the car 100 in the moving direction in the hoistway, and the like.

Here, the "equivalent position and moving distance" refer to a position and moving distance of the car in the vertical direction obtained from the amount of rotational displacement of the motor 106 indicated by the count value of the pulse signal output from the pulse generator 107.

The car 100 is provided with a first position detector 1 spaced apart from the car 100 by a predetermined distance in the ascending/descending direction of the car 100. In the hoistway, a detection object 2 detected by a first position detector 1 is provided corresponding to an openable door position of each floor. Accordingly, when the car 100 is located at the door openable position, the detection object 2 is detected by the first position detector 1.

Here, as the first position detector 1, a photoelectric sensor, a magnetic sensor, a high-frequency magnetic field sensor, or the like can be applied. In addition, various objects 2 (for example, shutters (optical, magnetic)) are applied according to the sensors used.

The output signal of the first position detector 1 is input to the safety controller 110. The safety controller 110 is a controller constituting a safety system of the elevator, and controls braking of the car 100 by a braking operation and power interruption independently of the elevator controller 109. The safety controller 110 includes a CPU (Central Processing Unit) as a main component for executing Processing, a watchdog timer for detecting an abnormality of the CPU, and a circuit for monitoring a power supply abnormality. Further, the CPU may be duplicated, and the processing operations may be compared with each other by the CPU to detect a processing abnormality of the CPU.

The car 100 is further provided with a second position detector 3 spaced apart from the car 100 by a predetermined distance in the ascending/descending direction of the car 100. The output signal of the second position detector 3 is input to the safety controller 110. Further, a long-shaped (belt-shaped, string-shaped, slender rod-shaped, or the like) object 4 to be detected by the second position detector 3 is suspended in the hoistway.

The elongated object 4 has absolute position information in the vertical direction in the hoistway, for example, height information from a reference floor, along the longitudinal direction. The absolute position information is continuously set for the object 4 by varying electromagnetic characteristics, optical characteristics, mechanical shapes and properties, geometric pattern shapes of the surface, and the like along the longitudinal direction of the object 4. On the other hand, as the second position detector 3 for detecting absolute position information set for the object 4, a magnetic sensor, a magnetostrictive sensor, an optical sensor, an image sensor, or the like is used.

The object 4 extends from the top to the bottom in the hoistway such that the longitudinal direction thereof extends along the height direction in the hoistway. The absolute position information is continuously set for the object 4 from a portion located at the top in the hoistway to a portion located at the bottom in the hoistway and a portion therebetween. This enables the absolute position of the car 100 (for example, the height of the position of the car 100 from the reference floor) to be continuously detected within the range in which the car 100 can move.

As a means for detecting the absolute position of the car in the hoistway, a rotary encoder provided in a governor having a governor rope, a toothed belt and an absolute encoder with a gear suspended in the hoistway, position detection using a camera image in the hoistway, and the like can be applied.

Fig. 2 is a block diagram showing a functional configuration of the safety controller in the present embodiment. In the figure, the dotted line portion corresponds to the safety controller 110 (fig. 1). In the present embodiment, the CPU executes a predetermined program to realize the functions of each unit.

Hereinafter, the function of the safety controller 110 will be described with reference to the other drawings (fig. 3 to 8).

The openable door position generating section 20 shown in fig. 2 generates data of a position at which the car 100 can open the door in the hoistway (hereinafter referred to as "openable door position") for an absolute position from a reference surface in the lower portion of the hoistway based on the output signals of the first position detector 1 and the second position detector, and stores the generated openable door position in a DB (database) 21.

Such DB21 is generated when the elevator is installed, when the object 2 (fig. 1) is displaced due to an earthquake or the like, or when a positional deviation occurs between the object 2 and the floor of the building due to the aging of the building. At this time, an elevator operation control system (not shown) executes a position measurement operation (hereinafter referred to as a "measurement operation") for generating the DB21. When receiving an openable door position generation command for instructing generation of the DB21 from the elevator operation control system side, the safety controller 110 executes processing for generating the DB21. The measurement operation is performed by moving the car 100 to the lowermost floor and then moving the car from the lowermost floor to the uppermost floor at a predetermined speed lower than the rated speed.

Fig. 3 is a timing chart showing an example of an output signal of the first position detector 1 during the measurement operation.

When the first position detector 1 detects the object 2, the output signal is turned ON. Thus, the ON state indicates that the position of the car 100 is the openable door position. In the present embodiment, the car floor coincides with the landing floor at the center of a period (hereinafter, referred to as "ON period") in which the output signal of the first position detector 1 is in the ON state (the time width before and after the time is a in the figure). Such an output signal can be obtained, for example, by providing a shutter such that the height of the shutter corresponds to the range of the door-openable position and the center of the shutter in the height direction corresponds to the stop position when the object 2 is a light shielding plate or a magnetic shielding plate.

Since the measurement operation is performed at a constant speed in the position measurement, the output signal waveform of the first position detector 1 is symmetrical with respect to the timing when the positions of the car floor and the landing floor coincide with each other at each floor.

Next, an outline of processing for generating the DB21 using the output signals of the first position detector 1 and the second position detector 3 in the openable position generating unit 20 will be described.

Fig. 4 is a timing chart showing an example of output signals of the first position detector 1 and the second position detector 3.

When the openable door position generating unit 20 of the safety controller 110 detects an ON edge of the output signal of the first position detector 1 (the timing at which the first position detector 1 starts detection of the object 2), the output value of the second position detector 3 at that timing is stored ("a" in fig. 4). Then, when the openable door position generating unit 20 detects an OFF edge of the output signal of the first position detector 1 (the timing at which the first position detector 1 finishes detecting the object 2), the output value of the second position detector 3 at that timing is stored ("B" in fig. 4).

As shown in fig. 3, since the center of the ON period of the output signal of the first position detector 1 is the timing when the car floor coincides with the landing floor, the openable position generating section 20 calculates (a + B)/2 as a position (hereinafter referred to as "floor position") where the car floor coincides with the landing floor. Then, the openable position generating section 20 sets a width C of the openable position in the elevator car lifting direction with reference to the floor position ((a + B)/2). That is, the openable position generating unit 20 calculates (a + B)/2 ± C as the upper limit and the lower limit of the openable position, and sets the openable position of the length 2C around the floor position. In addition, the width C is stored in advance by the safety controller 110.

The openable position generating unit 20 performs the above-described processing on each floor, and generates a DB21 of the openable position for each floor from the lowest floor to the uppermost floor.

Fig. 5 is a structural diagram of the DB21. The DB21 is stored in a storage device, not shown, included in the security controller 110.

DB21 includes floors, the center position (floor position of the above-mentioned floor) of the first position detector 1 calculated from the output values (a, B, \8230;) of the second position detectors 3 at each floor, and data of upper and lower limits of the openable door position obtained by adding or subtracting the magnitudes (α, β) of the openable door position to or from the center position. In addition, DB21 may include the output values (a, B, \8230;) of the second position detectors 3 at the respective floors together with these data.

The width of the openable door may be changed according to the floor as shown in fig. 5.

The openable door position output unit 22 shown in fig. 2 determines an openable door position based on the determination result output from the DB21 and the abnormality determination unit 23 that determines whether or not the second position detector 3 is abnormal as described later, and outputs the openable door position to the elevator controller 109 (fig. 1) or the like. The openable position output unit 22 outputs the openable position with reference to the DB21 when the determination result of the abnormality determination unit 23 is not "abnormal". Further, the openable door position output section 22 outputs the output signal of the first position detector 1 as data indicating the openable door position when the judgment result of the abnormality judgment section 23 is "abnormal". At this time, since the second position detector 3 is abnormal, the elevator controller 109 (fig. 1) performs the retracting operation using the output signal of the first position detector 1.

Here, the retraction operation refers to an operation performed at a lower speed than normal (during service operation), an operation performed with a floor range restricted than normal (during service operation), a movement to the nearest floor, and the like.

The abnormality determination unit 23 determines that the second position detector 3 is abnormal when the magnitude of the difference between the floor level position calculated from the output value of the second position detector 3 at each time of the ON edge and the OFF edge of the output signal of the first position detector 1 and the floor level position data stored in the DB21 exceeds the allowable value during normal operation (service operation). Then, the abnormality determination section 23 outputs "abnormal" as a determination result to the door openable position output section 22.

Further, the smaller the allowable value of the difference is, the higher the detection sensitivity of the abnormality is and the earlier detection is possible, but the number of retracting operations increases, and the larger the allowable value is, the lower the detection sensitivity of the abnormality is, but the number of retracting operations decreases. Therefore, the allowable value of the difference is appropriately set in consideration of both the detection sensitivity and the frequency of the retracting operation.

Such a difference occurs due to a positional shift of the object 2 caused by an earthquake, a positional deviation between the object 2 and the floor of the building caused by an aged change of the building, and expansion and contraction of the object 4 depending on the temperature and humidity in the hoistway by the second position detector 3. Therefore, an abnormality of the position detection means can be detected based on the magnitude of the difference.

Next, the DB generation process executed by the openable position generation unit 20 will be described.

Fig. 6 is a flowchart showing the DB generation process executed by the openable position generation unit. In the following description, unless otherwise specified, the main body for executing each process is the openable door position generating section 20 (fig. 2).

First, in step 300, it is determined whether or not a command for generating a door openable position from the outside (elevator operation control system) is ON. When the command for generating the openable door position is OFF (NO in step 300), the DB generation process is ended (step 301).

When the command for generating the openable door position is ON ("YES" in step 300), it is determined in step 302 whether the output of the first position detector 1 is ON. When the output of the first position detector 1 is OFF (no in step 302), it is determined in step 303 that the position of the car 100 is not the initial position (measurement operation start position), and after an abnormality is output to the outside (elevator operation control system), the DB generation process is ended (step 304).

In the present embodiment, during the measurement operation, the elevator operation control system sets the initial position of the car 100 to the lowermost floor (stop position) and causes the car 100 to travel to the uppermost floor. In addition, the elevator operation control system may set the initial position to the uppermost layer and cause the car 100 to travel to the lowermost layer.

When the output of the first position detector 1 is ON (yes in step 302), in step 305, the output value of the second position detector 3 is stored in the DB21 as the floor position of the lowest floor.

Next, in step 306, it waits until the first position detector 1 turns OFF (waits for the DB generation processing to be executed).

Further, in step 307, it is waited until the output of the first position detector 1 is turned ON again, that is, the next openable door position is detected.

When the output of the first position detector 1 is turned ON again (yes in step 307), the output value of the second position detector 3 is stored in step 308, and then the output of the first position detector 1 is turned OFF in step 309. When the timing is OFF (yes in step 309), the output value of the second position detector 3 is stored again in step 310.

Next, based on the stored output value of the second position detector 3, in step 311, the floor position, which is the center ("center" in fig. 5) of the range of the openable door position, is calculated, and the calculated floor position is stored in the DB21. Further, the upper limit and the lower limit of the range of the openable position are calculated by adding or subtracting predetermined values (α, β in fig. 5) of the width of the openable position to or from the floor surface position obtained by the calculation, and stored in the DB21.

Thereafter, in step 312, floor N is incremented by 1 floor. That is, the next DB21 generation target floor is set. Next, at step 313, it is determined whether or not the openable position generation command from the outside is OFF, and if not (no at step 313), the above-described processing is repeatedly executed. If it is OFF (yes in step 313), in step 314, the output value of the second position detector 3 is stored in the DB21 as the uppermost floor position, and the process is ended (step 315).

In the present embodiment, the timing at which the openable door position generation command is turned OFF is the timing at which the car 100 moves to the uppermost floor and the car 100 stops at the uppermost floor and stops by the elevator operation control system.

Next, a process of setting the openable position for control by the openable position output unit 22 (fig. 2) will be described.

Fig. 7 is a flowchart showing the openable position setting process executed by the openable position generating unit. In the following description, the openable door position output unit 22 (fig. 2) is a main body for executing each process unless otherwise specified.

First, in step 400, it is determined whether or not an abnormality notification is received from the abnormality determination unit 23 (determination result output). When the abnormality notification is received (yes in step 400), the output of the first position detector 1 is outputted as the openable door position in step 401, and then a notification indicating that the second position detector 3 has failed is outputted in step 402. When the elevator controller 109 (fig. 1) receives the notification of the failure of the second position detector 3, it executes the retracting operation.

In the present embodiment, the elevator controller 109 normally performs the operation control of the car using the door-openable position detected by the second position detector 3, but when an abnormality of the second position detector 3 is detected, the operation of the car 100 can be continued although the retracting operation is performed by detecting the door-openable position using the first position detector 1.

When the abnormality notification is not received from the abnormality determination section 23 (no in step 400), it is determined in step 404 whether or not the output of the second position detector 3 is within the range of the openable door position of the DB21 (between the "upper limit" and the "lower limit" in fig. 5), and if the output of the second position detector 3 is within the range of the openable door position (yes in step 404), the openable door position is turned ON (the door can be opened) and output (step 405). In addition, if the output of the second position detector 3 is outside the range of the door openable position (no in step 404), the door openable position is set to OFF (door cannot be opened) and output (step 406).

When the moving car 100 is to be stopped at the floor position, the openable position output unit 22 outputs an ON signal indicating that the door can be opened when the car 100 moves in the hoistway and reaches the upper limit (in the case of downward movement) or the lower limit (in the case of upward movement) within the range of the openable position in accordance with the above-described step 405. When receiving the ON signal, the elevator controller 109 acquires data of the width of the door opening position (corresponding to α and β in fig. 5) of each floor stored in the storage device of the controller or the safety controller 110, and obtains the remaining distance (= the width of the door opening position) to the stop position (= the floor position). The elevator controller 109 decelerates the car 100 according to the remaining distance to stop at the floor position and stop.

When the moving car 100 is to stop at the floor position, the output of the openable position output portion 22, that is, the output signal of the first position detector 1 (see fig. 3) is switched from the OFF state (door cannot be opened) to the ON state (door can be opened) when the car 100 moves in the hoistway and reaches the upper limit (in the case of downward movement) or the lower limit (in the case of upward movement) within the range of the openable position in step 401. When such an ON edge of the output signal is received, the size of the detected body 2 is set in advance in accordance with the width of the openable door position, and therefore the elevator controller 109 can know the remaining distance to the stop position (= the width of the openable door position). The elevator controller 109 may also know the remaining distance by acquiring data of the width of the door openable position of each floor stored in the storage device of the controller. The elevator controller 109 decelerates the car 100 according to the remaining distance to stop at the floor position and stop.

Next, the abnormality determination processing of the second position detector performed by the abnormality determination unit 23 will be described.

Fig. 8 is a flowchart showing an abnormality determination process of the second position detector executed by the abnormality determination unit. In the following description, unless otherwise specified, the main body that executes each process is the abnormality determination unit 23 (fig. 2).

First, in step 500, it is determined whether or not an ON edge of the output of the first position detector 1 is detected, and if an ON edge is not detected (no in step 500), the process is terminated (step 506).

When the ON edge of the output of the first position detector 1 is detected (yes in step 500), the output of the second position detector 3, that is, the position a', is stored in step 501. Next, in step 502, the output of the first position detector 1 waits until an OFF edge is detected.

When the OFF edge of the output of the first position detector is detected (yes in step 502), in step 503, the position B' which is the output of the second position detector 3 is stored.

Next, in step 504, the measured floor position (a + B)/2 stored in DB21 is compared with the floor position (a '+ B')/2 measured this time. That is, it is determined whether or not the magnitude of the difference between (a + B)/2 and (a '+ B')/2 is larger than a predetermined permissible value δ, and when the difference is larger than the set value δ (yes in step 504), an abnormality notification (determination result output) of the second position detector 3 is output to the openable position output unit 22 (step 505).

In step 504, the measurement results of the floor surface position at each time may be accumulated, and based on the tendency of the change in the floor surface position, an abnormality of the second position detector 3 may be determined or the timing of occurrence of the abnormality may be predicted. Therefore, a method of predicting the occurrence of an abnormality will be described.

Fig. 9 is a diagram showing an example of a temporal change in the measurement result of the floor surface position. This example is a result obtained by plotting the measurement results of floor ground positions on a certain floor in chronological order. In fig. 9, the vertical axis represents floor position and the horizontal axis represents time.

The abnormality determination unit 23 includes the floor position (a + B)/2 initially measured, and measures and accumulates the floor position in a storage device (not shown) every time the car 100 passes through the floor. Then, the tendency of the temporal change in the deviation of the floor surface position from (A + B)/2 is estimated from the accumulated floor surface position data before the current time and the currently measured floor surface position data. The abnormality determination unit 23 predicts the time at which the deviation of the floor position of the future floor reaches the permissible value δ based on the estimated tendency, and outputs the predicted time to the elevator operation control system side such as the elevator controller 109.

The time when the deviation of the floor position reaches the allowable value δ can be acquired as the operation information by the maintenance worker by outputting the time to the elevator operation control system as described above. Therefore, by performing the measurement operation for measuring the floor surface position at the time of maintenance before the predicted time is reached, it is possible to compensate for the influence of factors of the past year (for example, the extension of the object 4, the compression of the building itself, and the like) with respect to the output value of the second position detector 3. This makes it possible to suppress variations in the openable door position due to variations in floor position data, variations in the position of the car at the time of stopping when the floor position data in the safety controller 110 is used for stopping control, and the like.

The openable door position data outputted by the openable door position output unit 22 (fig. 2) is used for the control of the elevator controller 109 and the like, and is also used for other safety functions 24 provided in the safety controller 110. The safety function is, for example, UCMP (unified Car Moving Protection) or ETSD (Emergency Terminal Speed-limiting Device), and an open door detection value of a door switch and a Speed detection value of a Car are used in addition to a position detection value of the Car.

According to the above embodiment, the safety controller 110 sets the output of the first position detector as the openable door position for elevator control when an abnormality occurs in the second position detector 3. This enables the openable position to be set with high reliability. Even if an abnormality occurs in the second position detector 3, the car 100 can be retracted and moved to open and close the car doors 112 at the openable position.

The safety controller 110 also causes the car 100 to perform a measurement operation, acquires an output value of the second position detector 3 in accordance with an output of the first position detector 1 provided at a position corresponding to the floor position and the openable position in the hoistway, calculates a floor position (stop position) and a range of the openable position of each floor using the acquired output value, and sets the range in the DB21. Therefore, the setting work of the floor surface position and the openable door position performed for the safety controller 110 and the elevator operation control system (the elevator controller 109 and the like) at the time of installation is reduced. In addition, the resetting work of the floor surface position and the openable door position is also lightened.

Further, since the range of the floor surface position (stop position) and the openable door position is calculated from the output value of the second position detector 3 obtained in accordance with the output (ON edge and OFF edge) of the first position detector 1, even if the output value of the second position detector 3 varies due to the secular change of the object 4 for detecting the absolute position of the car 100 or the secular change of the building, the influence thereof can be compensated, and the floor surface position and the openable door position can be reliably set.

In the above embodiment, the safety controller 110 and the elevator operation control system (including the elevator controller 109) have independent position detection devices, respectively. That is, the safety controller 110 includes the first position detector 1 and the object 2, and the second position detector 3 and the elongated object 4, while the elevator controller 109 includes the pulse generator 107 such as a rotary encoder. However, the elevator controller 109 acquires data of the floor surface position and the openable door position for control (e.g., stop control, etc.) from the safety controller 110. Further, the present invention is not limited to such a position detection method, and for example, the safety controller 110 may be provided with the second position detector 3 and the object 4, the elevator controller 109 may be provided with the pulse generator 107 such as a rotary encoder, and the first position detector 1 and the object 2 may be shared by the safety controller 110 and the elevator controller 109 as independent position detection devices. In this case, the first position detector 1 and the detected object 2 are used for setting the floor position and the openable door position in the safety controller 110, and are used for normal control (stop control or the like) in the elevator controller 109.

The DB generation process shown in fig. 6 is executed not only at the time of elevator installation but also at the time of maintenance. For example, when the first position detector and the object 2 are displaced due to an earthquake or the like, the DB generation process is executed after the set position is returned to the original position. In addition, even when the abnormality determination unit 23 determines that there is an abnormality, the DB generation process is executed. By this, the reliability of the data of the floor surface position and the openable door position stored in the DB21 is improved.

The present invention is not limited to the above embodiment, and includes various modifications. For example, the above embodiments have been described in detail to explain the present invention easily, and the present invention is not limited to the embodiments having all the configurations described. In addition, other configurations can be added, deleted, and replaced for a part of the configurations of the embodiments.

For example, the elevator equipment may be a machine-room-less type elevator equipment in which a hoisting machine and a control device are installed in a hoistway.

When a plurality of elevator units start and arrive at one landing, the abnormal unit may be stopped as a retraction operation, and the service operation may be continued with a smaller number of elevator units than usual.

Description of the reference numerals

1 a first position detector, 2 a detected body, 3 a second position detector, 4 a detected body, 20 an open door position generating part, 21DB (database), 22 an open door position output part, 23 an abnormality judging part, 100 a car, 104 a rope wheel, 105 a guide wheel, 106 a motor, 107 a pulse generator, 108 a power converter, 109 an elevator controller, 110 a safety controller, 111 a landing door, 112 a car door, 113 a counterweight and 115 a landing.

Claims (10)

1. An elevator installation comprising:

a position detection device for detecting the position of the car in the hoistway;

an elevator controller that controls operation of the car; and

a safety controller independent of the elevator controller that outputs a signal indicating whether or not it is an openable door position for control by the elevator controller based on an output of the position detecting device,

the elevator installation is characterized in that:

the position detection device includes:

a first position detection unit having a first detection object provided at a position corresponding to a floor surface position in the hoistway and a first position detector for detecting the first detection object; and

a second position detecting unit that detects an absolute position of the car in the hoistway,

the safety controller includes:

a database holding data of the openable door position;

an abnormality determination unit that determines whether or not there is an abnormality in the second position detection unit based on an output of the second position detection unit; and

a openable door position output section that, when the abnormality determination section determines that there is no abnormality, determines whether the output of the second position detection section is within a range of the data of the openable door position and outputs the signal indicating whether it is the openable door position based on a result of the determination, and when the abnormality determination section determines that there is an abnormality, outputs the output signal of the first position detection section as the signal indicating whether it is the openable door position.

2. Elevator installation according to claim 1, characterized in that:

the safety controller further includes an openable door position generating part acquiring an output value of the second position detecting part corresponding to the output signal of the first position detecting part, calculating the openable door position with reference to a floor ground position based on the acquired output value, and saving the data of the calculated openable door position in the database.

3. An elevator installation according to claim 2, characterized in that:

the openable position generating section acquires the output value of the second position detecting section in correspondence with an ON edge and an OFF edge of the output signal of the first position detecting section, calculates the floor surface position based ON the output value, and calculates a range of the openable position based ON the calculated floor surface position and a prescribed magnitude of the openable position.

4. An elevator installation according to claim 2, characterized in that:

the elevator controller causes the car to operate at a speed less than a rated speed.

5. Elevator installation according to claim 1, characterized in that:

the abnormality determination unit compares a floor surface position calculated based on the output of the second position detection unit acquired in accordance with the output signal of the first position detection unit with floor surface position data stored in the database, and determines whether or not there is an abnormality in the second position detection unit.

6. Elevator installation according to claim 5, characterized in that:

the abnormality determination unit determines whether or not the second position detection unit has an abnormality based on the calculated difference between the floor surface position and the floor surface position data.

7. Elevator installation according to claim 1, characterized in that:

the abnormality determination unit accumulates the calculated floor positions in chronological order and predicts a time of occurrence of an abnormality based on the accumulated data.

8. An elevator installation according to claim 1, characterized in that:

and an elevator controller that causes the car to perform a retracting operation based on an output signal of the first position detection unit when the abnormality determination unit determines that there is an abnormality.

9. An elevator installation according to claim 1, characterized in that:

the safety controller further includes an openable door position generating unit that acquires an output value of the second position detecting unit in accordance with the output signal of the first position detecting unit when it is determined that there is an abnormality, calculates an openable door position with reference to a floor position based on the acquired output value, and stores the data of the calculated openable door position in the database.

10. An elevator installation according to claim 9, wherein:

the elevator controller causes the car to operate at a speed less than a rated speed.

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