JP2011051764A - Elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deterioration of the detection accuracy of various sensors of a non-contact guide device when a circumferential temperature of the non-contact guide device of a car is changed. <P>SOLUTION: An elevator control board 7 starts the test operation of the car 2 for discriminating the necessity of the correction of control gains of the various sensors of the non-contact guide device 11 when it is recognized that the car 2 is stopped and there is no passenger in the car 2 when the car is stopped. A control device 12 for the non-contact guide device determines that an error is generated due to a change of the circumferential temperature, and it is necessary to correct a control gain of a sensor when a difference between output values form the gap sensor and a current detector and a normal value is not smaller than a prescribed value when the gap sensor of the non-contact guide device 11 passes a prescribed point where a step of a guide rail 8 is generated, and performs correction so that the difference does not reach the prescribed value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator that guides a car in a non-contact state with respect to a guide rail.

  A conventional elevator is configured such that a car suspended from a rope moves up and down along a pair of guide rails installed vertically in a hoistway. A rotational moment acts on the car due to an imbalance of the load in the car, etc., but the car is supported by a guide device attached to the car by a guide rail.

  Conventionally, as a guide device for a car, a rotation support type roller guide, a sliding guide shoe that slides on a guide rail, and the like have been used. In such a contact-type guide device, vibration and noise caused by guide rail joints and deflection are transmitted to the car via the guide device wheels and sliding parts, which is one of the factors that impair the riding comfort of the elevator. It was one.

  In recent years, in order to avoid such a problem, for example, as disclosed in Patent Document 1, a guide device constituted by an electromagnet is mounted on a car and a magnetic force is applied to an iron guide rail. There is a way to guide the car without contact.

  This is because the electromagnets placed at the four corners of the car energize the magnet with the guide rail surrounded from three directions, thereby controlling the magnetic force between the guide rail and the guide device. On the other hand, it is possible to guide in a non-contact manner.

JP 2006-188316 A

  In the guide device configured by an electromagnet as disclosed in Patent Document 1 described above, a gap sensor and a current sensor, which are control sensors, are installed in the vicinity of the coil of the electromagnet. This coil temperature rises as the ambient temperature rises, causing offset voltage drift in internal circuits such as the operational amplifier of the control sensor and deviation of control gain with respect to the output signal of the control sensor. As a result, a deviation between the detection value of each sensor and the actual value occurs, and the detection accuracy of various sensors decreases.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevator that can prevent a decrease in detection accuracy of a sensor of the non-contact guide device when the temperature around the non-contact guide device of the car changes. It is in.

  That is, the elevator according to the present invention is mounted on the guide rail laid in the vertical direction in the hoistway, the car that moves up and down along the guide rail, and the car, through the guide rail and the gap. A magnet unit having an opposing electromagnet, a permanent magnet that is arranged to share a magnetic path with the electromagnet in the gap and supplies a magnetomotive force necessary to guide the car, and the electromagnet has the gap And a sensor unit for detecting a physical quantity of the magnetic circuit formed with the guide rail, guide control means for controlling the exciting current of the electromagnet based on the output of the sensor unit and stabilizing the magnetic circuit, and the car Is the difference between the output value of the sensor unit when the guide rail passes a predetermined position and the predetermined normal value when the guide rail passes. If it is the predetermined value satisfying the condition requiring correction of emission, characterized in that a correcting means for correcting a gain of the sensor portion so as not satisfy the condition.

  ADVANTAGE OF THE INVENTION According to this invention, when the temperature around the non-contact guide apparatus of a car changes, the fall of the detection accuracy of the sensor of the said non-contact guide apparatus can be prevented.

The figure which shows the structural example of the elevator in the 1st Embodiment of this invention. The perspective view which shows the structure of the non-contact guide apparatus in the 1st Embodiment of this invention of this invention. The figure which shows the positional relationship of the non-contact guide apparatus and guide rail of the elevator in the 1st Embodiment of this invention. The block diagram which shows the structural example of the control apparatus for elevator non-contact guide apparatuses in the 1st Embodiment of this invention. The block diagram which shows the structural example of the elevator control panel of the elevator in the 1st Embodiment of this invention. The flowchart which shows an example of the processing operation of the elevator in the 1st Embodiment of this invention. Sectional drawing for demonstrating the installation location of the gap sensor of the non-contact guide apparatus of the elevator in the 2nd Embodiment of this invention. The flowchart which shows an example of the processing operation of the elevator in the 2nd Embodiment of this invention. The block diagram which shows the structural example of the control apparatus for non-contact guide apparatuses of the elevator in the 3rd Embodiment of this invention. The flowchart which shows an example of the processing operation of the elevator in the 3rd Embodiment of this invention. The block diagram which shows the structural example of the control apparatus for elevator non-contact guide apparatuses in the 4th Embodiment of this invention. The flowchart which shows an example of the processing operation of the elevator in the 4th Embodiment of this invention. The block diagram which shows the structural example of the control apparatus for elevator non-contact guide apparatuses in the 5th Embodiment of this invention. The figure for demonstrating the positional relationship of the guide rail of the elevator and non-contact guide apparatus in the 5th Embodiment of this invention. The flowchart which shows an example of the processing operation of the elevator in the 5th Embodiment of this invention. The figure for demonstrating the positional relationship of the guide rail concerning correction | amendment of the gain shift after the offset voltage correction of the gap sensor by the elevator in the 5th Embodiment of this invention, and a non-contact guide apparatus. The flowchart which shows an example of the processing operation for the correction | amendment of the gain shift after the offset voltage correction of the gap sensor by the elevator in the 5th Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a diagram illustrating a configuration example of an elevator according to the first embodiment of the present invention.
The elevator includes a hoist 1, a car 2, a main rope 3, a suspension weight (C / W) 4, a pulse generator 5, a deflector sheave 6, an elevator control panel 7, a guide rail 8, a tail cord 9, and a hoistway 10 , A non-contact guide device 11, a non-contact guide device control device 12 on the upper part of the car 2, and a load sensor 13.

  The hoisting machine 1 is provided in the machine room of this elevator. The car 2 is connected to a suspension weight 4 through a main rope 3 wound around a sheave provided on the rotating shaft of the hoisting machine 1 and a baffle sheave 6. As the sheave is driven by the hoisting machine 1, the car 2 moves up and down in the hoistway 10 together with the suspension weight 4 by the frictional force between the sheave and the main rope 3.

  The elevator control panel 7 is provided in the machine room and controls the operation of the car 2. The load sensor 13 is composed of a differential transformer, a gap sensor, and the like, is installed at the lower part of the car 2, and outputs a voltage signal for calculating a load signal to the elevator control panel 7 via the tail cord 9. The non-contact guide device controller 12 is connected to the elevator control panel 7 via the tail cord 9.

The pulse generator 5 is installed on the rotation shaft of the hoisting machine 1, detects the shaft rotation of the hoisting machine 1, and generates a number of pulse signals proportional to the rotation angle.
The elevator control panel 7 considers that the car 2 has arrived at the landing position on the destination floor when the accumulated count number of pulse signals matches the predetermined number of pulses corresponding to the destination floor. The car 2 is stopped by controlling the drive.

  The guide rails 8 are a pair of T-shaped guide rails made of a ferromagnetic material and made of a ferromagnetic material, and are laid in the hoistway 10 in the vertical direction. Further, non-contact guide devices 11 are attached to four places on the upper, lower, left and right sides of the car 2. The car 2 is suspended by the main rope 3 and guided to the guide rail 8 in the hoistway 10 via the non-contact guide device 11, and moves up and down in the hoistway 10.

FIG. 2 is a perspective view showing the configuration of the non-contact guide device according to the first embodiment of the present invention.
As shown in FIG. 2, the non-contact guide device 11 includes a magnet unit 11a and a base 11b that supports the magnet unit 11a.
The non-contact guide device 11 includes a gap sensor 14 that detects a distance between the magnet unit 11 a and the guide rail 8, a permanent magnet 15, and an electromagnet 16, and is controlled by the non-contact guide device controller 12. Thus, the attracting force of the permanent magnet 15 and the electromagnet 16 is applied to the guide rail 8 to guide the car 2 in a non-contact manner.
The permanent magnet 15 is disposed so as to share a magnetic path with the electromagnet 16 in the gap between the guide rail 8 and the electromagnet 16, and supplies a magnetomotive force necessary for guiding the car 2.

  The gap sensor 14 detects a change in magnetomotive force, magnetic resistance, or movement of the car 2 in a magnetic circuit formed by the permanent magnet 15 and the electromagnet 16, so that the gap sensor 14 and the guide rail 8 of the non-contact guide device 11 are detected. For example, the distance between the gap sensor 14 of the non-contact guide device 11 and the guide rail 8 is detected.

  The non-contact guide device controller 12 calculates a voltage required for stable guidance of the car 2 based on the detection result of the gap sensor 14, and the non-contact guide device 11 calculates the calculated voltage. Voltage is applied to the coil of the electromagnet 16 to control the exciting current of the coil of the electromagnet 16 to obtain a stable guide of the car 2.

FIG. 3 is a diagram showing a positional relationship between the non-contact guide device for the elevator and the guide rail in the first embodiment of the present invention.
As shown in FIG. 3, the magnet unit 11a is formed by assembling E-shaped permanent magnets 15a and 15b and electromagnets 16a, 16b and 16c. Moreover, as shown in FIG. 3, the gap sensor 14 of the non-contact guide apparatus 11 consists of gap sensors 14a and 14b.

  Moreover, the guide rail 8 has a parallel part parallel to the left-right direction of the car door and a protrusion that extends vertically from the center of the parallel part toward the inside of the hoistway 10 along the front-rear direction of the car door. .

The longitudinal direction of the electromagnets 16a, 16b, and 16c is a direction along the left-right direction of the car door. The electromagnet 16a has a protrusion at the central portion that faces the wall surface of the hoistway 10.
The permanent magnet 15a is attached so that one end thereof is attached to one end of the electromagnet 16a, the other end faces the wall surface of the hoistway 10, and the longitudinal direction is perpendicular to the longitudinal direction of the electromagnet 16a.
The permanent magnet 15b is attached so that one end thereof is attached to the other end of the electromagnet 16a, the other end faces the wall surface of the hoistway 10, and the longitudinal direction is parallel to the longitudinal direction of the permanent magnet 15a.

One end of the electromagnet 16 b is attached to the other end of the permanent magnet 15 a, the longitudinal direction is perpendicular to the longitudinal direction of the permanent magnet 15 a, the other end is parallel to the longitudinal direction of the electromagnet 16 a, and the other end is the guide rail 8. It is attached to face the protrusion.
One end of the electromagnet 16c is attached to the other end of the permanent magnet 15b, the longitudinal direction is perpendicular to the longitudinal direction of the permanent magnet 15b, parallel to the longitudinal direction of the electromagnet 16a, and the other end of the electrorail 16c. It is attached to face the protrusion.

  These electromagnets 16a, 16b and 16c are obtained by winding a coil around an iron core. A gap sensor 14a for detecting a gap in the left-right direction of the car door between the electromagnet 16a and the protrusion of the guide rail 8 is attached to the tip of the protrusion of the electromagnet 16a. The gap sensor 14a faces the tip portion of the protrusion of the guide rail 8.

  A gap sensor 14b is attached to the other end of the electromagnet 16b to detect a gap in the front-rear direction of the car door between the electromagnet 16b and the protrusion of the guide rail 8. This gap sensor 14 b is close to the protrusion of the guide rail 8. Hereinafter, as necessary, the gap sensors 14a and 14b are simply referred to as the gap sensor 14, the permanent magnets 15a and 15b are simply referred to as the permanent magnet 15, and the electromagnets 16a, 16b, and 16c are simply referred to as the electromagnet 16.

  The control device 12 for the non-contact guide device controls the voltage to each coil of the electromagnet 16 of the non-contact guide device 11 so that the electromagnet 16b and the electromagnet 16c face the guide rail 8, and A suction force is applied in a direction orthogonal to this direction.

FIG. 4 is a block diagram illustrating a configuration example of a control device for an elevator non-contact guide device according to the first embodiment of the present invention.
As illustrated in FIG. 4, the non-contact guide device control device 12 includes a current detector 21, a calculator 22, a power supply unit 23, a gain correction unit 24, a storage device 25, and a passage determination unit 26.
The current detector 21 detects a current value flowing through the coil of the electromagnet 16 of the non-contact guide device 11. Specifically, the current detector 21 converts the current to be detected into a voltage signal, and detects this voltage signal as a current value flowing through the coil of the electromagnet 16.

  Based on the signals from the current detector 21 and the gap sensor 14, the arithmetic unit 22 takes into account the normal value of the preset offset voltage of the current detector 21 and the gap sensor 14 at a predetermined room temperature. The voltage applied to the coil of the electromagnet 16 is calculated to guide the car 2 in a non-contact manner. The power supply unit 23 supplies power to the coil of the electromagnet 16 based on the calculation result of the calculator 22. The non-contact guide device controller 12 controls the attractive forces of the magnet units 11 a installed at the four corners of the car 2 by the supply of this electric power.

  The gain correction unit 24 corrects the control gain for the signal from the gap sensor 14 and the control gain for the signal from the current detector 21 for the above-described calculation by the calculator 22.

The storage device 25 is a storage medium such as a nonvolatile memory, and stores an initial value of the output voltage value of the gap sensor 14 and an initial value of the output voltage value of the current detector 21. This initial value is a voltage value when the non-contact guide device 11 passes through a predetermined portion where a step is generated in the guide rail 8 and the temperature is a predetermined room temperature.
The passage determination unit 26 determines whether or not the non-contact guide device 11 has passed through a predetermined location where the step of the guide rail 8 is generated based on a change in the signal from the gap sensor 14.

  Here, the non-contact guide device control device 12 converges the currents of the coils of the electromagnets 16a, 16b, and 16c to zero, so that the permanent magnet is permanent regardless of the weight of the car 2 and the magnitude of the unbalanced force. So-called zero power control is performed in which the car 2 is stably supported only by the attractive force of the magnet 15.

  By configuring the magnetic guide system by zero power control, the car 2 is stably supported in a non-contact manner with respect to the guide rail 8, and when it is in a steady state, the current flowing through the coil of the electromagnet 16 converges to zero. The force necessary for stable support of the car 2 is all covered by the magnetic force generated by the permanent magnet 15.

  This is the same even when the load or balance of the car 2 changes. That is, when any external force is applied to the car 2, a current is transiently applied to the coil of the electromagnet 16 in order to make the size of the gap between the non-contact guide device 11 and the guide rail 8 a predetermined size. Will flow. When the stable state is obtained again, the current flowing through the coil of the electromagnet 16 converges to zero by using the above-described zero power control. In this case, the load applied to the car 2 and the permanent magnet 15 A gap having a size that balances the attractive force generated by the magnetic force is formed.

FIG. 5 is a block diagram illustrating a configuration example of the elevator control panel of the elevator according to the first embodiment of the present invention.
As shown in FIG. 5, the elevator control panel 7 includes a load detection unit 31 and an operation control unit 32.
The load detection unit 31 detects the load value of the car 2 based on the signal from the load sensor 13. The operation control unit 32 controls the operation of the car 2.

Next, an operation for preventing a decrease in detection accuracy of the sensor of the elevator non-contact guide apparatus having the configuration described so far will be described. FIG. 6 is a flowchart showing an example of an elevator processing operation according to the first embodiment of the present invention.
First, when the elevator control panel 7 determines that the car 2 is stopped based on the signal from the pulse generator 5 (YES in step S1), the load detection unit 31 causes the load sensor 13 to Based on this signal, the load value of the car 2 is detected (step S2).

  When the elevator control panel 7 detects that no passengers are present in the car 2 as a result of detection of the load value of the car 2 (YES in step S3), the elevator control panel 7 determines whether the sensor of the four non-contact guide devices 11 After selecting one device for determining whether or not control gain correction is necessary, a test operation of the car 2 is started to determine whether or not control gain correction of various sensors of this device is necessary. Is notified to the non-contact guide device control device 12. (Step S4).

When the non-contact guide device control device 12 receives this notification, the passage determination unit 26 acquires a signal from the gap sensor 14 of the non-contact guide device 11 to be determined (step S5).
The passage determination unit 26 determines that the gap sensor 14 of the non-contact guide device 11 to be determined has passed a predetermined portion where the step of the guide rail 8 has occurred when the change in the signal becomes a predetermined value. Then (YES in step S6), the computing unit 22 acquires the output voltage values of the gap sensors 14a and 14b and the output voltage value from the current detector 21 at the time of passage (step S7).

The computing unit 22 reads and acquires the initial value of the output voltage value of the gap sensors 14a and 14b and the initial value of the output voltage value of the current detector 21 from the storage device 25 (step S8).
When the difference between the output value of the gap sensor 14a acquired in the process of step S7 and the initial value of the output voltage value of the gap sensor 14a read out in the process of step S8 is equal to or greater than a predetermined value, the computing unit 22 And the initial value of the output voltage value of the gap sensor 14b read out in step S8 is greater than or equal to a predetermined value, or the output value of the current detector 21 obtained in step S7 and step S8. When the difference from the initial value of the output voltage value of the current detector 21 read in the process is equal to or larger than a predetermined value (YES in step S9), the output value of the sensor in which the difference equal to or larger than the predetermined value is generated. It is determined that an error due to a change in ambient temperature, in particular, a change in temperature of the coil of the electromagnet 16 has occurred, and the control gain of the sensor needs to be corrected. Difference is computed the made such gain correction value not more than the predetermined value described above (step S10).

  Then, the gain correction unit 24 corrects the control gain of the sensor to be corrected among the gap sensors 14a and 14b or the current detector 21 based on the gain correction value calculated by the calculator 22. The elevator control panel 7 is notified (step S11). Upon receiving this notification, the elevator control panel 7 ends the test operation by the operation control unit 32 (step S12).

  Thereafter, one of the four non-contact guide devices 11 that has not been selected as a target device for determining whether or not to correct the control gain of the sensor is selected again, and the above-described test running is repeated. Moreover, you may make it perform the process of step S7 to S10 about each of the four non-contact guidance apparatuses 11 by one test driving | running | working.

  As described above, in the elevator according to the first embodiment of the present invention, when there are no passengers in the stopped car 2, the car 2 is operated, and various sensors at the time of passing through a predetermined step portion of the guide rail 8. Since the difference between the output value and the initial value is an error due to the influence of the ambient temperature change and is a difference that requires correction of the control gain of the sensor, the control gain is corrected. Even if the temperature of the coil of the electromagnet 16 changes, the output values of the various sensors of the non-contact guide device 11 take into account the influence of the temperature change, so that it is possible to prevent a decrease in detection accuracy due to the temperature change. it can.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In addition, description of the same part as what was shown in FIG. 1 among the structures of the elevator in each following embodiment is abbreviate | omitted.
The storage device 25 is a storage medium such as a nonvolatile memory, and stores an initial value of the output voltage value of the gap sensor 14 and an initial value of the output voltage value of the current detector 21. This initial value is a voltage value when the temperature is a predetermined room temperature when the non-contact guide device 11 passes through a predetermined location on the guide rail 8.

FIG. 7 is a cross-sectional view for explaining the installation location of the gap sensor of the elevator non-contact guide apparatus in the second embodiment of the present invention.
As shown in FIG. 7, in the second embodiment of the present invention, the gap sensor of the non-contact guide device 11 is not limited to the gap sensors 14 a and 14 b described in the first embodiment. It further has a gap sensor 14c installed vertically below, and a gap sensor 14d installed vertically below the installation location of the gap sensor 14b.

FIG. 8 is a flowchart illustrating an example of an elevator processing operation according to the second embodiment of the present invention.
The elevator control panel 7 selects one of the four non-contact guide devices 11 that is a target for determining whether or not the control gain of the gap sensor 14 needs to be corrected, and then the load detection unit 31 detects from the load sensor 13. Based on this signal, the load value of the car 2 is detected (step S21).

  If the elevator control panel 7 detects that there are no passengers in the car 2 as a result of detection of the load value of the car 2 (YES in step S22), the gap sensor 14 of the non-contact guide device 11 to be determined. The test operation of the car 2 for determining whether or not the control gain needs to be corrected is started, and this is notified to the non-contact guide device controller 12 (step S23).

When the non-contact guide device control device 12 receives this notification, the passage determination unit 26 acquires a signal from the gap sensor 14 of the non-contact guide device 11 to be determined (step S24).
The passage determination unit 26 determines that the gap sensor 14 of the non-contact guide device 11 to be determined has passed a predetermined portion where the step of the guide rail 8 has occurred when the change in the signal becomes a predetermined value. Then (YES in step S25), the computing unit 22 acquires the output voltage values of the gap sensors 14a and 14b, which are the upper gap sensors, at this time of passage (step S26). Then, the computing unit 22 acquires the output voltage values of the gap sensors 14c and 14d, which are the lower gap sensors at the time of passage described above (step S27).

The computing unit 22 reads out and acquires the initial value of the output voltage value for each of the gap sensors 14a, 14b, 14c, and 14d from the storage device 25.
The calculator 22 determines that the difference between the output values of the gap sensors 14a and 14c acquired in the process of step S27 and the initial value of the output voltage value of the same gap sensor that has been read is equal to or greater than a predetermined value, or the process of step S27. If the difference between the output values of the gap sensors 14b and 14d acquired in step 1 and the initial value of the output voltage value of the same gap sensor that has been read is equal to or greater than a predetermined value (YES in step S28), the difference equal to or greater than the predetermined value It is determined that there is an error due to a change in ambient temperature in the output value of the gap sensor related to the above, and it is determined that the control gain of the sensor needs to be corrected, and this is notified to the elevator control panel 7.

When the elevator control panel 7 receives this notification, when the car 2 has landed on the nearest floor (YES in step S29), the elevator control panel 7 notifies this to the non-contact guidance device control device 12.
When the non-contact guide control device 12 receives this notification, the calculator 22 calculates a gain correction value such that the above-described difference is not greater than or equal to the above-described predetermined value (step S30).

  Then, based on the gain correction value calculated by the calculator 22, the gain correction unit 24 controls the gap sensor that is a gain correction target among the combination of the gap sensors 14 a and 14 c and the combination of the gap sensors 14 b and 14 d. The gain is corrected, and this is notified to the elevator control panel 7 (step S31). Upon receiving this notification, the elevator control panel 7 ends the operation by the operation control unit 32 (step S32). Thereafter, one of the four non-contact guide devices 11 that has not been selected as a target device for determining whether or not correction of the control gain of the gap sensor is necessary is selected again, and the above-described traveling is repeated.

  As described above, in the elevator according to the second embodiment of the present invention, the output values from the two gap sensors in the vertical relationship when the car travels and passes through a predetermined portion of the guide rail are When an error due to the influence of temperature change is recognized and the control gain of the gap sensor needs to be corrected, the control gain is corrected. Therefore, as in the first embodiment, the temperature of the coil or the like of the non-contact guide device Even if it changes, the output value of the gap sensor is a value that takes into account the effect of temperature changes, so that it is possible to prevent a decrease in detection accuracy due to temperature changes, and the output values of the two gap sensors that are vertically related to each other. Since the necessity of gain correction is determined based on the original, it is possible to prevent erroneous determination of the necessity of gain correction due to fluctuations in the output value of the gap sensor due to temporary vibration from the outside. Can.

(Third embodiment)
Next, a third embodiment of the present invention will be described. FIG. 9 is a block diagram illustrating a configuration example of a control device for an elevator non-contact guide device according to the second embodiment of the present invention.
As illustrated in FIG. 9, the control device 12 for a non-contact guide device according to the present embodiment includes a current detector 21, a calculator 22, a power supply unit 23, a storage device 25, and an offset voltage correction unit 27. The offset voltage correction unit 27 corrects a deviation of the offset voltage of the gap sensor 14 due to a temperature change or the like.

  The storage device 25 is a storage medium such as a nonvolatile memory, and stores a normal value of the offset voltage value of the gap sensor 14. The normal value is an offset voltage value when the temperature is a predetermined room temperature.

FIG. 10 is a flowchart illustrating an example of the elevator processing operation according to the third embodiment of the present invention.
First, after starting operation of the car 2 (step S41), the elevator control panel 7 determines that the car 2 has stopped at a predetermined position based on a signal from the pulse generator 5 (step S41). In S42, the load detector 31 detects the load value of the car 2 based on the signal from the load sensor 13 (step S43).

  When the elevator control panel 7 recognizes that there are no passengers in the car 2 as a result of the detection of the load value of the car 2 (YES in step S44), the elevator control panel 7 uses the offset voltage among the four non-contact guide devices 11. This is notified to the non-contact guide device control device 12 after selecting one device to be determined whether or not correction is necessary.

  When the non-contact guide device control device 12 receives this notification, the computing unit 22 acquires an offset voltage value that is an output value of the gap sensors 14a and 14b of the non-contact guide device 11 to be determined (step S45). In the state where the passenger car 2 without passengers is stopped, the non-contact guide device control device 12 performs the above-described zero power control, so that the voltages output from the gap sensors 14a and 14b are offset voltages. That is, in this state, when the offset voltage output from the gap sensors 14a and 14b has a difference with respect to the normal value at room temperature, a deviation due to a temperature change has occurred. However, as described above, the calculator 22 calculates the voltage to be applied to the electromagnet 16 in consideration of the normal value that is the offset voltage at room temperature, and the normal value is corrected by the offset voltage correction unit 27. There is a need to.

  When the offset voltage value of the gap sensor 14a acquired by the process of step S45 has a difference of a predetermined value or more with respect to the normal value that is the offset voltage that should be output from the gap sensor 14a, the arithmetic unit 22 Alternatively, when the offset voltage value of the gap sensor 14b acquired in the process of step S45 has a difference of a predetermined value or more with respect to a normal value that is an offset voltage that should be output from the gap sensor 14b ( In step S46, the sensor output value in which a difference equal to or greater than the predetermined value has an error due to a change in ambient temperature, particularly a change in temperature of the coil of the electromagnet 16, and the offset voltage of the sensor needs to be corrected. Then, the offset voltage correction value is set such that the difference described above is not equal to or greater than the predetermined value described above. Calculated (step S47).

  Then, based on the offset voltage correction value calculated by the calculator 22, the offset voltage correction unit 27 corrects the offset voltage value of the sensor that is the offset voltage correction target among the gap sensors 14a and 14b, and this is indicated in the elevator. The control panel 7 is notified (step S48). Thereafter, one of the four non-contact guide devices 11 that has not been selected as the device to be determined whether offset voltage is necessary is selected again, and the above-described correction is repeated.

  As described above, in the elevator according to the third embodiment of the present invention, when there is no passenger in the stopped car 2, the offset voltage that is the output value of the gap sensor is greater than a normal value that should originally be output. If there is a difference, it is determined that an error due to a change in ambient temperature, in particular, a change in the temperature of the coil of the electromagnet 16, has occurred, and it is determined that the offset voltage of the gap sensor needs to be corrected. The offset voltage of the sensor can be set to an appropriate value.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. FIG. 11 is a block diagram illustrating a configuration example of a control device for an elevator non-contact guide device according to the fourth embodiment of the present invention.
As shown in FIG. 11, the control device 12 for a non-contact guide device according to the present embodiment includes a current detector 21, a calculator 22, a power supply unit 23, a storage device 25, an offset voltage correction unit 27, and a temperature detection unit. 28.

The storage device 25 has an offset to be output for each of the gap sensors 14a and 14b with respect to a temperature value belonging to a predetermined range, for example, a range of 10 degrees Celsius to 100 degrees Celsius when the car 2 without passengers is stopped. The voltage is stored in advance.
The temperature detector 28 detects a temperature value indicated by a signal from a temperature sensor (not shown) provided individually in the vicinity of each of the gap sensors 14a and 14b.

FIG. 12 is a flowchart illustrating an example of an elevator processing operation according to the fourth embodiment of the present invention.
The temperature detection unit 28 of the non-contact guide device control device 12 sequentially detects the temperature value indicated by the signal from the temperature sensor in the vicinity of the gap sensors 14a and 14b of each non-contact guide device 11 at predetermined time intervals ( Step S51).

  Then, the computing unit 22 reads the offset voltages of the gap sensors 14a and 14b corresponding to the temperature detected in the process of step S51 from the storage device 25 (step S52).

  Then, the offset voltage correction unit 27 corrects each offset voltage of the gap sensors 14a and 14b so as to be the offset voltage read in the process of step S52 (step S53).

  As described above, in the elevator according to the fourth embodiment of the present invention, the offset voltage of the gap sensor of the non-contact guide device 11 is set to a value that should be output corresponding to the temperature value in the vicinity of the gap sensor. Since the correction is performed, the offset voltage of the gap sensor can be set to an appropriate value even if the temperature changes.

  Further, in the present embodiment, the non-contact guide device controller 12 determines the temperature value in the vicinity of the gap sensor 14 to be determined whether offset voltage correction is necessary from the temperature sensors individually provided for each gap sensor. However, the present invention is not limited to this, and one temperature sensor is provided for any one gap sensor 14, and the temperature value is detected based on the signal from the temperature sensor. With respect to the detected temperature value, each temperature value of the gap sensor other than the installation destination of the temperature sensor may be estimated by a change in the resistance value of the coil of the electromagnet 16. Thereby, the installation number of a temperature sensor can be reduced.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. FIG. 13: is a block diagram which shows the structural example of the control apparatus for elevator non-contact guide apparatuses in the 5th Embodiment of this invention.
As shown in FIG. 13, the control device 12 for a non-contact guide device according to the present embodiment includes a current detector 21, a calculator 22, a power supply unit 23, a gain correction unit 24, a storage device 25, an offset voltage correction unit 27, And a gap sensor displacement control unit 29.

FIG. 14 is a diagram for explaining the positional relationship between an elevator guide rail and a non-contact guide device according to the fifth embodiment of the present invention.
The gap sensor displacement control unit 29 of the controller 12 for non-contact guide device adjusts the excitation current for the coil of the electromagnet 16 in a state where the car 2 is stopped at a predetermined position, and the non-contact guide device 11 and the guide rail 8. As shown in FIG. 14, the relative position is gradually changed, and one of the gap sensors 14 of the non-contact guide device 11 is displaced until it contacts the guide rail 8.

  In this way, when the non-contact guide device 11 comes into contact with the guide rail 8 by the attractive force of the permanent magnet 15, the non-contact guide device control device 12 excites the coil of the electromagnet 16 of the non-contact guide device 11. Turn off the current.

  Thereby, since the attractive force control by the electromagnet 16 is eliminated, only the magnetic force by the permanent magnet 15 of the magnet unit 11 a acts between the non-contact guide device 11 and the guide rail 8. Therefore, the non-contact guide device 11 maintains the state of being attracted to the guide rail 8 even when no current is excited in the coil of the electromagnet 16, and the car 2 is contacted and supported with respect to the guide rail 8.

FIG. 15 is a flowchart illustrating an example of an elevator processing operation according to the fifth embodiment of the present invention.
First, after starting the operation of the car 2 (step S61), the elevator control panel 7 determines that the car 2 has stopped at a predetermined position based on the signal from the pulse generator 5 (step S61). In step S62, the load detection unit 31 detects the load value of the car 2 based on the signal from the load sensor 13 (step S63).

  When the elevator control panel 7 detects that no passenger is present in the car 2 as a result of detecting the load value of the car 2 (YES in step S64), the elevator control panel 7 detects the offset voltage among the four non-contact guide devices 11. This is notified to the non-contact guidance device control device 12 after selecting one device to be determined whether or not correction is necessary.

  When the non-contact guide device control device 12 receives this notification, the gap sensor displacement control unit 29 adjusts the excitation current for the coil of the electromagnet 16 of the non-contact guide device 11 to be determined, and the non-contact guide device 11 and the guide. The relative position with respect to the rail 8 is gradually changed (step S65) and is displaced until one of the gap sensors of the non-contact guide device 11 contacts the guide rail 8 (step S66). Here, as shown in FIG. 14, it is assumed that the gap sensor 14 b contacts the guide rail 8.

And the calculator 22 acquires the offset voltage value which is an output value of the gap sensor 14b of the non-contact guidance apparatus 11 of discrimination | determination object (step S67).
In a state where the gap sensor 14b is in contact with the guide rail 8, the output value of the gap sensor 14b is set to a predetermined normal value. This normal value is stored in the storage device 25 in advance.

  When the offset voltage value of the gap sensor 14b acquired in the process of step S67 is different from the normal value that is the offset voltage that should be output from the gap sensor 14b, the computing unit 22 Regarding the offset voltage of the sensor in which the difference has occurred, it is determined that an error due to a change in the ambient temperature, particularly the temperature change of the coil of the electromagnet 16, has occurred, and it is determined that the offset voltage of the sensor needs to be corrected. An offset voltage correction value is calculated (step S68).

  Then, the offset voltage correction unit 27 corrects the offset voltage value of the gap sensor 14b based on the offset voltage correction value calculated by the calculator 22, and notifies this to the elevator control panel 7 (step S69).

  Thereafter, one non-selected gap sensor is selected again as a target for determining whether or not the offset voltage is required from the same non-contact guide device 11, and the offset voltage is corrected through contact between the sensor and the guide rail 8. When all the determinations related to the sensors of the same non-contact guide apparatus 11 are completed, each of the gap sensors of the other non-contact guide apparatuses 11 is selected as a sensor to be determined one by one. It is determined whether or not the offset voltage has been corrected through contact with the guide rail 8.

Next, correction of the gap deviation of the gap sensor by measuring the gap between the installation side end and the opposite end of the gap sensor 14 in the magnet unit 11a after the correction of the offset voltage of the gap sensor according to the present embodiment. explain.
The installation side end of the gap sensor 14 in the magnet unit 11a is the end of the electromagnet 16b shown in FIG. 14 where the gap sensor 14b is attached. Further, the opposite end portion of the gap sensor 14b in the magnet unit 11a is the end portion of the electromagnet 16c at the tip of the gap sensor 14b as viewed from the gap sensor 14b.

FIG. 16 is a diagram for explaining the positional relationship between the guide rail and the non-contact guide device for correcting the gain deviation after correcting the offset voltage of the gap sensor by the elevator according to the fifth embodiment of the present invention.
FIG. 17 is a flowchart showing an example of a processing operation for correcting a gain deviation after correcting the offset voltage of the gap sensor by the elevator according to the fifth embodiment of the present invention.
As described above, after the offset voltage of the gap sensor 14 is corrected, the gap sensor displacement control unit 29 of the non-contact guide device controller 12 determines whether the electromagnet 16 of the non-contact guide device 11 to be determined as to whether gain correction is necessary. The excitation current for the coil is adjusted again, and the relative position between the gap sensor 14b of the non-contact guide device 11 and the guide rail 8 is gradually changed. As shown in FIG. 16, the gap sensor 14b of the non-contact guide device 11 is changed. The guide rail 8 is displaced until it comes into contact with the end portion of the electromagnet 16c, which is the opposite end portion (step S81).

And the calculator 22 acquires the offset voltage value which is an output value of the gap sensor 14b of the non-contact guidance apparatus 11 of discrimination | determination object (step S82).
In a state where the opposite end of the gap sensor 14b is in contact with the guide rail 8, the output value of the gap sensor 14b is set to a predetermined normal value. This value is stored in the storage device 25.

  When the output value of the gap sensor 14b acquired in the process of step S82 has a difference from the normal value that is the voltage value that should be output from the gap sensor 14b, the computing unit 22 Since the offset voltage of 14b has been corrected as described above, an error due to a change in ambient temperature, particularly a change in temperature of the coil of the electromagnet 16 has occurred in the output value of the sensor in which this difference has occurred. It is determined that the control gain of the sensor needs to be corrected, and a control gain correction value is calculated so that the above-described difference disappears (step S83).

  Then, the gain correction unit 24 corrects the control gain of the gap sensor 14b based on the control gain correction value calculated by the calculator 22, and notifies this to the elevator control panel 7 (step S84).

  As described above, in the elevator according to the fifth embodiment of the present invention, when the gap sensor is brought into contact with the guide rail in a state where the car is stopped, and the deviation due to the temperature change is recognized in the output value of the gap sensor. Since the offset voltage of the gap sensor is corrected according to this deviation, the offset voltage of the gap sensor can be corrected to an appropriate value even if a temperature change occurs.

  Furthermore, if the gap sensor control gain deviation is found as a result of measuring the gap between the gap sensor installation side end and the opposite end after the offset voltage correction, this deviation will be eliminated. Since the control gain is corrected, the control gain of the gap sensor can be corrected to an appropriate value even if the temperature changes.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 2 ... Car, 3 ... Main rope, 4 ... Suspension weight, 5 ... Pulse generator, 6 ... Deflection sheave, 7 ... Elevator control panel, 8 ... Guide rail, 9 ... Tail cord, 10 ... Hoistway, 11 ... non-contact guide device, 11a ... magnet unit, 12 ... control device for non-contact guide device, 13 ... load sensor, 14 ... gap sensor, 15 ... permanent magnet, 16 ... electromagnet, 21 ... current detector, DESCRIPTION OF SYMBOLS 22 ... Operation unit, 23 ... Electric power supply part, 24 ... Gain correction part, 25 ... Memory | storage device, 26 ... Pass determination part, 27 ... Offset voltage correction part, 28 ... Temperature detection part, 29 ... Gap sensor displacement control part, 31 ... load detection unit, 32 ... operation control unit.

Claims (7)

Guide rails laid vertically in the hoistway;
A car that goes up and down along the guide rail,
An electromagnet mounted on the car and facing the guide rail via a gap, and arranged so as to share a magnetic path with the electromagnet in the gap and having a magnetomotive force necessary to guide the car A magnet unit having a permanent magnet to supply;
A sensor unit for detecting a physical quantity of a magnetic circuit formed by the electromagnet and the gap and the guide rail;
Guidance control means for stabilizing the magnetic circuit by controlling the excitation current of the electromagnet based on the output of the sensor unit;
The difference between the output value of the sensor unit when the car travels and passes through a predetermined position of the guide rail and a predetermined normal value when the vehicle passes the value satisfying a predetermined condition that requires correction of the gain of the sensor unit And a correction means for correcting the gain of the sensor unit so as not to satisfy the condition. Load detecting means for detecting a load value of the car;
A discriminating means for discriminating whether or not the inside of the car is unmanned based on a detection result by the load detecting means when the car is stopped;
The correction means includes
When the determination means determines that the inside of the car is unmanned, the output value of the sensor unit when the car travels and passes through a predetermined position where a step in the guide rail is provided, and 2. The gain of the sensor unit is corrected so that the condition is not satisfied when a difference from a predetermined normal value is a value that satisfies a predetermined condition that requires correction of the gain of the sensor unit. The elevator described in 1. Two sensor parts are provided along the vertical direction of the guide rail,
The correction means includes
The difference between each of the output values of the two sensor units when the car travels through a predetermined position on the guide rail and a predetermined normal value when the vehicle passes is a predetermined value that requires correction of the gain of the sensor unit. 2. The elevator according to claim 1, wherein when the condition is satisfied, the gain of the sensor unit is corrected so that the condition is not satisfied when the car reaches the nearest floor. Guide rails laid vertically in the hoistway;
A car that goes up and down along the guide rail,
An electromagnet mounted on the car and facing the guide rail via a gap, and arranged so as to share a magnetic path with the electromagnet in the gap and having a magnetomotive force necessary to guide the car A magnet unit having a permanent magnet to supply;
A sensor unit for detecting a state in the gap of the magnetic circuit formed by the electromagnet and the gap and the guide rail;
Guidance control means for stabilizing the magnetic circuit by controlling the excitation current of the electromagnet based on the output of the sensor unit;
Detecting means for detecting an offset voltage of the sensor unit when the car is stopped;
When the difference between the detection result by the detection means and the normal value of the offset voltage of the sensor unit is a value that satisfies a predetermined condition that requires correction of the offset voltage, the offset voltage of the sensor unit is not satisfied. An elevator comprising correction means for correcting Guide rails laid vertically in the hoistway;
A car that goes up and down along the guide rail,
An electromagnet mounted on the car and facing the guide rail via a gap, and arranged so as to share a magnetic path with the electromagnet in the gap and having a magnetomotive force necessary to guide the car A magnet unit having a permanent magnet to supply;
A sensor unit for detecting a state in the gap of the magnetic circuit formed by the electromagnet and the gap and the guide rail;
Guidance control means for stabilizing the magnetic circuit by controlling the excitation current of the electromagnet based on the output of the sensor unit;
Detecting means for detecting an offset voltage of the sensor unit when the car is stopped;
Temperature detecting means for detecting the temperature in the vicinity of the sensor unit;
An elevator comprising: correction means for correcting the offset voltage of the sensor unit to a value corresponding to the temperature value detected by the temperature detection means. Guide rails laid vertically in the hoistway;
A car that goes up and down along the guide rail,
An electromagnet mounted on the car and facing the guide rail via a gap, and arranged so as to share a magnetic path with the electromagnet in the gap and having a magnetomotive force necessary to guide the car A magnet unit having a permanent magnet to supply;
A sensor unit for detecting a state in the gap of the magnetic circuit formed by the electromagnet and the gap and the guide rail;
Guidance control means for stabilizing the magnetic circuit by controlling the excitation current of the electromagnet based on the output of the sensor unit;
Position control means for controlling a change in relative position between the sensor unit and the guide rail so that the sensor unit and the guide rail come into contact with each other after the car stops;
Detection means for detecting an offset voltage of the sensor unit after control of the relative position by the position control means;
When the difference between the detection result of the detection means and the normal value of the offset voltage when the sensor unit of the sensor unit is in contact with the guide rail is a value that satisfies a predetermined condition that requires correction of the offset voltage And an correcting means for correcting an offset voltage of the sensor unit so as not to satisfy the condition. The position control means includes
After the correction by the correction means, the sensor unit is separated from the guide rail, and a gap with a predetermined length is formed between the sensor and the sensor so that the guide rail comes into contact with the magnet unit. Re-control the change in relative position between the part and the guide rail,
The detection means detects an offset voltage of the sensor unit after control of the relative position by the position control means,
The difference between the normal value of the offset voltage of the sensor unit and the detection result by the detection means when the guide rail is in contact with the magnet unit is a value that satisfies a predetermined condition that requires correction of the control gain of the sensor unit The elevator according to claim 6, further comprising: a second correction unit that corrects the control gain of the sensor unit so that the condition is not satisfied.

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