JPH0840663A - Ropeless elevator device - Google Patents

Abstract

PURPOSE:To easily if necessary judge the normal or abnormal thrust of a linear motor by providing a thrust detecting means for detecting the thrust of an elevator generated by the primary coil and a magnet member of the linear motor in a ropeless elevator apparatus driven by the linear motor. CONSTITUTION:Fixing plates 41, 42 mounting permanent magnets 40A-40D as field magnet member of a linear synchronous motor and holding a cage frame 23 are provided with load detecting means 45, 46 the output signals of which are sent to a controller on the ground through an induction wireless communication means 7. When the thrust of the linear motor is detected in the stoppage thereof, the outputs of the load detecting means 45, 46 are compared with a reference value in a comparing circuit on the basis of a command from a check commanding circuit. When the output as a tension load is larger than the reference value, the output is sent out. On the other hand, when the thrust in traveling is detected, the outputs of load detecting means 45, 46 are compared with the corresponding reference value to generate the output when the detecting value as a compression load is smaller than the reference value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor driven low press elevator apparatus which does not use a rope.

[0002]

2. Description of the Related Art In recent years, a so-called low press elevator which does not use a rope has been proposed as seen in Japanese Patent Laid-Open No. 2-261789. FIG. 5: is a block diagram which shows an example of the conventional low press elevator apparatus. In the figure, 1 is a hoistway, 2 is a car, 3 is a floor, 21 is an upper guide roller for guiding the car 2 along the rail 5, and 22 is a lower guide roller. Similarly, a guide roller is attached to the rail 6 side. Reference numeral 10 denotes a braking device which will be described later, and a braking shoe facing the rail 5 is provided at the bottom of the car 2 as shown in FIG. A braking device is also provided on the rail 6 side. Reference numeral 30 denotes an armature coil of a linear synchronous motor arranged in the hoistway 1,
D. 40 is an armature coil 30 which is on the side surface of the car 2 and is a primary coil of the linear synchronous motor.
Is a permanent magnet for a field constituting the secondary side of the linear synchronous motor arranged so as to face the
It is composed of 0D. FIG. 6 shows a structure of an excitation circuit of an armature coil of a linear motor of a conventional low-press elevator device. In the drawing, 1000 is a linear motor drive power supply device, 100 is a variable voltage variable frequency composed of power transistors and the like. It is a control device (hereinafter referred to as a VVVF device), and although not shown, a plurality of devices are generally installed. 101 is the armature coil 30 and VVVF
The contacts of the changeover switch for connecting and disconnecting the device 100, the armature coil 30 is divided into sections 31 to 38 in the middle of the floor, and the drive power supply 10
Power is supplied from 00. The position of the car 2 is detected, the corresponding sections 31 to 38 are selected, and the drive power supply apparatus 1000 is excited. In addition, VVVF
Regarding the device 100, for example, Japanese Patent Laid-Open No. 61-17028.
Since it has already been disclosed in Japanese Patent Publication No. 7, etc., details will be described here. FIG. 7 shows a braking means of a conventional low press elevator device. In the figure, 10 is a braking means, 10a is a braking shoe provided on the side surface of the guide rail 6, and 10b is a braking shoe 10 via a lever 10c.
The spring 10d for pressing a against the guide rail 6 attracts the rod 10r against the spring and holds the braking shoe 10a in the open position when excited by an electromagnet device fixed to the lower portion of the car 2. Reference numeral 10p is a pin fixed to the car 2 to pivotally support the lever 10c.

Next, the operation will be described. When a start command is issued, the contact 101 is closed. In addition, the electromagnet device 10
d is energized to bring the braking device 10 into the open state. VVV
The F device 100 generates an alternating current of a predetermined voltage and frequency according to a predetermined speed command signal and applies it to the armature coil 30. The moving magnetic field causes the car 2 to move up and down. The driving power supply device 1000 selects and excites a corresponding armature coil according to the movement of the car. When the car reaches the destination floor, the braking device 10 stops the car 2 and the contact 101 is opened.

[0004]

Since the conventional low press elevator system is constructed as described above, the linear synchronous motor for driving the car or the VVVF system 100 fails and the thrust of the drive system is lost. Since it falls, it is in a very dangerous state. Countermeasures against this failure are one of the most important problems in this low press elevator. As one of the countermeasures against this, a car drive device composed of a VVVF device 100, a linear synchronous motor, etc. is made into a multiple system, parallel drive operation is performed, and even if one of them fails, it is backed up by another system. A method is being considered. However, even in such a system, the following matters are further problems. (1) Before traveling, it is necessary to judge the normality / abnormality of each car drive device to further improve safety. (2) In a car driving device of such a system, a feedback control system is generally adopted. Therefore, for example, even if one system fails and outputs an excessively large or too small output, the remaining system backs up, so that a failure occurs. In some cases, it may be difficult to make it apparent. In such a case, one series will continue to operate with a failure, and if the next series fails, there is a possibility of a very dangerous state. This problem is particularly serious in the case of a double system. Therefore, it is desired to detect the failure of each series. (3) After discovering that one of the sequences is faulty,
When performing backup operation with the remaining series, safety is improved by determining the normal / abnormal state of the car drive device of the remaining series. (4) A method of comparing and examining the current command value to the motor and the actual current of the motor has been proposed for the failure detection of the car drive device, but if the current command value of the motor itself is a failure, it is judged as a failure. However, it is difficult to judge the failure of the magnetic pole position detection circuit of the linear synchronous motor by the above method. Therefore, the failure detection is not perfect in the above method.

The present invention has been made in order to solve the above problems, and it is an appropriate failure detecting means for a car driving device composed of the above-described multiplex linear motor and a low safety improving means. A press elevator device is provided.

[0006]

A low-press elevator apparatus according to the present invention comprises a car for moving up and down in a hoistway, a primary coil of a linear motor laid in the step of moving the car up and down,
A magnet member constituting a secondary side of a linear motor that is attached to the primary coil on a side portion of the car and drives the car up and down, and a thrust of an elevator generated by the primary coil and the magnet member of the linear motor is detected. Thrust detection means is provided.

Further, a plurality of independently installed linear motors and load detecting means provided between the point of action of the thrust of the linear motors and the car and detecting a load corresponding to the linear motors are provided. The thrust detected by the load detection means is used to determine whether the thrust of the linear motor is normal or abnormal.

Further, a fixed plate mounted with a permanent magnet for a field of a linear motor and connected through a connecting means to the car so as to be movable in a vertical direction by a small distance, and a load applied to the fixed plate. And a load detecting means for detecting

Further, an induction wireless communication means having an antenna fixed to the car side and a communication cable installed in the hoistway are provided, and the output signal of the load detection means is transmitted to the elevator control device. .

Further, a comparison circuit for comparing the output signal of the load detecting means and the reference load value is provided, and when the compression load detected by the load detecting means during traveling of the elevator is smaller than the reference value, the thrust of the linear motor is abnormal. It is a judgment.

Further, a comparison circuit for comparing the output signal of the load detecting means and the reference load value is provided, and the braking means for stopping the elevator car is operated in the elevator stopped state, and the tensile load detected by the load detecting means. Is larger than the reference value, it is judged that the thrust force of the linear motor is abnormal.

When one series of linear motors is determined to be abnormal and the other series of linear motors is determined to be normal, the linear motor on the normal side drives the elevator to the nearest floor.

When it is determined that one series of linear motors is abnormal, the linear motors of the other series are temporarily stopped, and after confirming that the other series of linear motors are normally generating thrust, the normal side linear motor drives the elevator to the nearest position. It is intended to drive to the floor.

[0014]

The low-press elevator apparatus according to the present invention is provided with the thrust detecting means for detecting the thrust of the elevator generated by the primary coil of the linear motor and the magnet member, so that the thrust of the linear motor is normal or abnormal as required. judge.

Further, by providing a plurality of independently installed linear motors and load detection means for detecting the load corresponding to the linear motors, normality and abnormality of the thrust of each linear motor can be independent. To judge.

In addition, the permanent magnet of the linear motor is mounted,
By detecting the load applied to the fixed plate connected to the car through the connecting means, it is possible to uniquely and stably determine whether the thrust of the linear motor is normal or abnormal.

Further, by providing the induction wireless communication means having the antenna fixed to the car side and the communication cable installed in the hoistway, the output signal of the load detector is transmitted to the elevator control device. .

Further, by providing the comparison circuit for comparing the output signal of the load detecting means with the reference load value, it is possible to determine the thrust abnormality of the linear motor as required during traveling of the elevator, at the time of stopping, or before traveling.

When it is determined that one series of linear motors is abnormal, the normal linear motor drives the elevator to rescue passengers to the nearest floor.

When it is determined that one series of linear motors is abnormal, the linear motors of one series stop temporarily, and it is confirmed that the linear motors of the other series generate thrust normally. Drive to the floor.

[0021]

1 is a cross sectional view (a) and a vertical sectional view (b) showing a low press elevator apparatus according to an embodiment of the present invention. The figure will be described. 23 is a car frame. Reference numeral 41 denotes a fixed plate A for mounting the permanent magnets 40A, 40B, which are field magnet members of the linear synchronous motor, and holding the car frame 23. Reference numeral 43 denotes a connecting means A for connecting the fixed plate A and the car frame 23. . The car frame 23 and the fixed plate A41 are configured to be relatively movable in the vertical direction by a small distance via the connecting means A43. 45 is a fixed plate A
It is a load detecting means A for detecting a load applied to the load. Similarly, 42 is a fixed plate B for mounting the permanent magnets 40C, 40D, which are field magnet members of the linear synchronous motor, and holding the car frame 23, 44 is a connecting means B for connecting the fixed plate B42 and the car frame 23. Is. The car frame 23 and the fixing plate B42 are configured to be relatively movable in the vertical direction by a small distance via the connecting means B44. 46 is a fixed plate B
The load detecting means B detects the load applied to the load 42. For example, strain gauge type load converters are used as the load detecting means 45 and 46. 10A is a braking means A fixed to the car frame 23. Similarly, 10B is a braking means B fixed to the car frame 23. Reference numeral 7 is a guide wireless communication means for connecting a car and a control device (not shown) on the ground, 71 is an antenna of the guide wireless communication means fixed to the car side, and 72 is a guide wireless communication means installed on the wall of the hoistway. It is a communication cable. The output signals of the load detecting means 45 and 46 are transmitted to the ground control device via the inductive wireless communication means 7. The other reference numerals are the same as or equivalent to those in the conventional example, and thus the description thereof is omitted.

FIG. 2 is an explanatory view showing a motor drive system according to an embodiment of the present invention. In the figure 100, 2
00, 300, 400 are VVVF devices, 101, 20
Reference numerals 1, 202, 301, 302 and 401 are contacts of the changeover switch. Reference numeral 50 is a control device. Other symbols are the same as those in the conventional example. In FIG. 2, when the car 1 is at the position shown in the drawing, the changeover switches 201 and 301 are closed, the armature coil 37 is excited by the VVVF device 200, and the armature coil 33 is excited by the VVVF device 300. When the car is lowered to the position of the armature coils 32 and 36, the changeover switches 101 and 401 are closed and are excited by the VVVF devices 100 and 400, respectively. It is sequentially controlled in this way.

FIG. 3 is a block diagram of a thrust force detection circuit for detecting a thrust force of a linear motor which is each driving device at the time of stoppage. The switch s is instructed by a check command circuit 48a.
When the output of the load detection means 35a is larger than the reference value as the tensile load when w1 is closed, the comparison circuit 47a.
Is configured to output, and is provided independently for each linear motor. FIG. 4 is a block diagram of the thrust detection circuit during traveling, and the switch sw2 is closed according to an instruction from the check command circuit 48b during traveling. The comparison circuit 47b is configured to output an output when the output of the load detection means 45b is smaller than the reference value as the compression load, and is provided for each linear motor.

First, a method of checking the thrust of the linear motor before traveling will be described. The car 1 is stopped at the position shown in FIG. 2, and the VVVF device 300 causes the armature coil 3 to operate with the braking devices 10A and 10B operating in the braking state.
Excite 3 and actually generate thrust and see. At this time, if the linear motor on the fixed plate A41 side is normal, thrust is generated according to the command value. As a result, the fixing plate A41 is lifted up, so that the load applied to the load detecting means A45 changes from tension to compression. Therefore, in this case, the stop thrust detection circuit of FIG. 3 operates as follows. FIG.
At the switch command switch 48a,
When 1 is closed, the output of the load detection means 45a becomes smaller than the reference value (including the sign of the force applied to the load detection means), so the comparison circuit 47a does not generate an output. Since the comparison circuit 47a of the thrust detection circuit at stop does not generate an output according to the check command, the linear motor on the fixed plate A41 side is determined to be normal.

Next, the case where the linear motor on the fixed plate A41 side is out of order will be described. Since the linear motor is out of order,
Since the fixed plate A41 cannot be lifted up due to its thrust, the load applied to the car load detection means 45 remains a tensile load and does not decrease in the compression direction. Therefore, in this case, the stop thrust detection circuit of FIG. 3 operates as follows to generate a failure signal. In FIG. 3, even if the switch sw1 is closed by the check command circuit 48a, the load detection means A45a
Is larger than the reference value as the pulling force, the comparator circuit 47a generates an output. The comparison circuit 47a of the thrust detection circuit at stop generates an output in response to the check command, so that the linear motor on the fixed plate A41 side is determined to be abnormal. The same can be confirmed for the linear motor on the fixed plate B42 side. In this case, the VVVF device 200 is used for checking.

Next, it is considered that the car 1 releases the braking device 10 and travels to the position shown in FIG. 2 while the linear motor on the fixed plate A41 side generates a normal thrust. When the vehicle is traveling normally with the braking device 10 opened, a compressive load about half that of the cab (including passengers) is applied to the load detecting means A45. Therefore, in the traveling thrust detection circuit of FIG.
Is larger than the reference value as a compressed load, the comparator circuit 47b of the traveling thrust detection circuit does not generate an output. This makes it possible to determine that the linear motor on the fixed plate A41 side is normal.

Next, consider a case where the linear motor on the fixed plate A41 side has a failure and loses or lowers its thrust. If the thrust is lost or drops due to the failure of the linear motor,
The load of the load detecting means A45 decreases because the compressive load applied when the thrust is normal, for example, when the thrust is lost, the load by the fixed plate 41 and the permanent magnet 40 is applied in the pulling direction. Therefore, in FIG. 4, since the output of the load detecting means 45b is smaller than the reference value as the compression load, the comparing circuit 47b of the running thrust detecting circuit generates a failure signal. This makes it possible to determine that the linear motor on the fixed plate A41 side is out of order. Similarly, with respect to the car drive device on the side of the fixed plate B42, it is possible to judge whether the car drive device is normal or abnormal by the similar running thrust detection circuit.

A method of operating the elevator after the failure of the linear motor is detected will be described. Even if the linear motor of one series loses the thrust, the linear motor on the healthy side generally compensates the excess and shortage of the thrust by the automatic control and can travel. However, for the sake of safety, once the thrust detection circuit generates a failure signal, the elevator is temporarily stopped.
Next, when carrying out a rescue run to rescue passengers, the above-mentioned pre-run check is performed, and the other run is confirmed and the run is resumed.

Further, even when the linear motor of one series loses the thrust, it is possible to travel with the excess or deficiency of the thrust being compensated by the linear motor on the healthy side by the automatic control. Therefore, it is also possible to confirm that the remaining linear motors have not failed and to drive to the nearest floor to rescue passengers. As described above, in the low-press elevator driven by the multiple linear motors, the failure of each series of linear motors can be detected individually, so that one series does not know the failure and does not run. The safety can be increased. Although the thrust detecting means in this embodiment has been described focusing on detecting the load generated by the thrust of the linear motor, the magnetic physical quantity (for example, magnetic flux) generated between the primary coil of the linear motor and the permanent magnet is described. It is also possible to judge whether the thrust force of the linear motor is normal or abnormal by measuring the change in).

[0030]

As described above, according to the present invention, by providing the thrust detecting means for detecting the thrust of the elevator generated by the primary coil of the linear motor and the magnet member,
Since it is possible to determine whether the thrust of the linear motor is normal or abnormal, there is an effect that a failure and a failure position of the linear motor can be found in real time.

Further, multiple linear motors and load detecting means for detecting a load corresponding to each linear motor are provided, and it is possible to independently judge whether the thrust of each linear motor is normal or abnormal. Therefore, it is possible to improve the safety of the operation of the low press elevator without continuing the operation of the elevator while one line of the linear motor is in failure.

Further, the permanent magnet of the linear motor is mounted,
By detecting the load applied to the fixed plate connected to the car via the connecting means, the normality / abnormality of the thrust of the linear motor can be directly and accurately grasped.

Further, by providing an induction wireless communication means having an antenna fixed to the car side and a communication cable installed in the hoistway, and transmitting the output signal of the load detector to the elevator control device, It is possible to safely control the operation of the low press elevator while constantly detecting whether the thrust of the linear motor is normal or abnormal.

Further, since the comparison circuit for comparing the output signal of the load detecting means with the reference load value is provided so that the thrust of the linear motor can be confirmed even when the elevator is stopped, the elevator is running, stopped or before running. Regardless of this, the thrust abnormality of the linear motor can be determined as necessary.

When it is determined that the linear motor of one series is abnormal, the linear motor on the normal side can drive the elevator to the nearest floor to promptly rescue the passenger.

When it is determined that the linear motor of one series is abnormal, the linear motor of one series temporarily stops, and it is confirmed that the linear motors of other series generate thrust normally. It has the effect of being able to run to the floor and rescue passengers without risk.

[Brief description of drawings]

FIG. 1 is a sectional view showing a low press elevator apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a motor drive system of a low press elevator device according to an embodiment of the present invention.

FIG. 3 is a configuration diagram showing a thrust force detection circuit at stop of the low press elevator apparatus according to an embodiment of the present invention.

FIG. 4 is a configuration diagram showing a running thrust detection circuit of the low press elevator system according to one embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional low press elevator device.

FIG. 6 is a configuration diagram showing an excitation circuit of an armature coil of a linear motor of a conventional low press elevator device.

FIG. 7 is a configuration diagram showing a braking means of a conventional low press elevator device.

[Explanation of reference numerals] 1 car, 7 induction wireless communication means, 10 braking means, 3
0 primary coil (armature coil), 40 magnet member, 4
1, 42 fixing plate, 43, 44 connecting means, 45 load detecting means, 47 comparing circuit, 71 antenna, 72 communication cable.

Claims (8)

[Claims] 1. A primary coil of a linear motor, which is laid in a raising / lowering step of the car, and a linear coil attached to the primary coil on a side portion of the car to drive the car up / down, along with a car that moves up and down in a hoistway. A low press elevator apparatus comprising: a magnet member that constitutes a secondary side of a motor; and a thrust detection unit that detects a thrust force of an elevator generated by the primary coil and the magnet member of the linear motor. 2. A plurality of linear motors installed independently, and load detection means provided between the point of action of the thrust of the linear motors and the car, for detecting the load corresponding to the linear motors, The low press elevator apparatus according to claim 1, wherein normality or abnormality of the thrust of the linear motor is determined based on the load detected by the load detection means. 3. A fixed plate, on which a permanent magnet for a field of a linear motor is mounted, and which is connected to the car through a connecting means so as to be movable in a vertical direction by a small distance, and a load applied to the fixed plate. The low press elevator apparatus according to claim 2, further comprising: a load detecting unit that detects the load. 4. An inductive wireless communication means having an antenna fixed to a car side, and a communication cable installed in a hoistway, wherein an output signal of the load detection means is transmitted to an elevator control device. The low press elevator apparatus according to claim 3. 5. A comparison circuit for comparing the output signal of the load detecting means with a reference load value is provided, and when the compression load detected by the load detecting means during traveling of the elevator is smaller than the reference value, it is determined that the thrust force of the linear motor is abnormal. The low press elevator apparatus according to claim 2, wherein the determination is performed. 6. A tensile load detected by the load detecting means is provided with a comparison circuit for comparing an output signal of the load detecting means with a reference load value, and a braking means for stopping an elevator car in a stopped state of the elevator is operated. Is larger than the reference value, it is determined that the thrust force of the linear motor is abnormal. 7. When it is determined that one series of linear motors is abnormal and the other series of linear motors is normal,
The low press elevator apparatus according to claim 2, wherein the elevator is moved to the nearest floor by a linear motor on the normal side. 8. When the linear motor of one series is determined to be abnormal, the linear motor is temporarily stopped, and after confirming that the linear motors of the other series generate thrust normally, the linear motor on the normal side drives the elevator to the nearest position. The low press elevator apparatus according to claim 2, wherein the low press elevator apparatus is driven to a floor.