Elevator device and method for confirming soundness of door-opening travel protection device of elevator device

Abstract

An elevator apparatus is provided in which an operation control unit does not determine an abnormal state by a self-diagnosis process of a door-opening travel protection device. 【Solution means】The operation control unit 14 monitors the operation status of the third power supply switching means 19, outputs a switching drive signal for releasing the connection circuit with the drive device 4 or the brake device 5 to the third power supply switching means 19, and then outputs a soundness confirmation command for diagnosing the soundness of the second power supply switching means 17 to the door-opening travel protection unit 15. The door-opening travel protection unit 15 monitors the operation status of the second power supply switching means 17, outputs a door-opening travel protection signal to the second power supply switching means 17 based on the soundness confirmation command, and executes a door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means 17 by comparing the operation status of the second power supply switching means 17 with the door-opening travel protection signal.

Description

Technical Field

[0001] The present invention relates to an elevator apparatus having a door-opening travel protection device for suppressing door-opening travel of an elevator, and a method for confirming the soundness of the door-opening travel protection device of the elevator apparatus.

Background Art

[0002] In recent years, as a safety function of an elevator, a door-opening travel protection device (door-opening travel protection unit) may be provided. When the elevator car during door-opening stop starts running without closing the door, or when the elevator car runs with at least one of the car door or the landing door being opened during running (door-opening travel), the door-opening travel protection device has a protection function for stopping the running of the elevator car when these states are detected. Specifically, a door-opening travel protection unit is provided separately from an operation control unit that controls the operation of the elevator car and switches the power supply to and cutoff from the drive device and the brake device for control. The door-opening travel protection unit detects the door-opening travel of the elevator car via car position detection means for detecting the position of the elevator car in the hoistway and door opening / closing detection means for detecting the opening / closing of the car door or the landing door, cuts off the power supply to at least one of the drive device and the brake device, stops the running of the elevator car, and suppresses the door-opening travel.

[0003] The operation control unit is provided with first power supply switching means for switching the power supply and cutoff according to a command of the operation control unit, cuts off the power supply to at least one of the drive device and the brake device by another third power supply switching means that operates by the power supply and cutoff of the first power supply switching means, and monitors the soundness of the third power supply switching means by monitoring another contact of the third power supply switching means. Further, the door-opening travel protection device is provided with second power supply switching means for switching the power supply and cutoff according to a command of the door-opening travel protection device, cuts off the power supply to at least one of the drive device and the brake device by a third power supply switching means that operates by the power supply and cutoff of the second power supply switching means, and monitors the soundness of the second power supply switching means by monitoring another contact of the second power supply switching means.

[0004] Incidentally, since the operation control unit and the door-open travel protection device perform operations related to safety, they may perform self-diagnosis processing to diagnose the soundness of their own functions. However, when the door-open travel protection device performs self-diagnosis processing without cooperating with the operation control unit, the operation control unit may determine that a state in which power supply to at least one of the drive device and the brake device is cut off by the self-diagnosis processing of the door-open travel protection device is abnormal.

[0005] As a publicly known technique related to the self-diagnosis processing of the door-open travel protection device, for example, there is an elevator device as shown in Patent Document 1.

Prior Art Document

Patent Document

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Therefore, the problem is to provide an elevator device in which the operation control unit does not determine an abnormal state due to the self-diagnosis processing of the door-open travel protection device.

Means for Solving the Problems

[0008] The elevator apparatus according to the present invention is an elevator apparatus having a door-opening travel protection device for suppressing door-opening travel, and includes an elevator car provided in a hoistway, an elevator door for opening and closing an elevator entrance, a drive device for applying a driving force to the elevator car, a brake device for braking the elevation of the elevator car and generating a braking force when power supply from a power source is interrupted, door-opening / closing detection means for detecting the open / closed state of the elevator door, car position detection means for detecting the position of the elevator car in the hoistway, a drive control unit for controlling the operation of the elevator car, and a door-opening travel protection unit configured independently of the drive control unit and capable of detecting door-opening travel of the elevator car by monitoring the position of the elevator car and the open / closed state of the elevator door via the door-opening / closing detection means and the car position detection means, and stopping the door-opening travel of the elevator car when the door-opening travel of the elevator car is detected, a third power supply switching means for opening a connection circuit between the power source and the drive device or the brake device based on a switching drive signal output from the drive control unit, and a second power supply switching means for causing the third power supply switching means to open the connection circuit between the power source and the drive device or the brake device based on a door-opening travel protection signal output from the door-opening travel protection unit. The drive control unit monitors the operating status of the third power supply switching means, outputs the switching drive signal for causing the third power supply switching means to open the connection circuit with the drive device or the brake device, and then outputs a soundness confirmation command for diagnosing the soundness of the second power supply switching means to the door-opening travel protection unit. The door-opening travel protection unit monitors the operating status of the second power supply switching means, outputs the door-opening travel protection signal to the second power supply switching means based on the soundness confirmation command, and executes a door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means by comparing the operating status of the second power supply switching means with the door-opening travel protection signal.

[0009] Further, in the elevator apparatus according to the present invention, the second power supply switching means is an electromagnetic contactor having a first contact of the second power supply switching means and a second contact of the second power supply switching means, By closing or opening the second contact of the second power supply switching means, power supply and cutoff to at least one of the drive device and the brake device are switched by the third power supply switching means, the closing and opening of the first contact of the second power supply switching means are monitored, and by checking the consistency with the output status of the door-opening travel protection signal, the door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means is executed.

[0010] Also, in the elevator device according to the present invention, the third power supply switching means is an electromagnetic contactor having a first contact of the third power supply switching means, a second contact of the third power supply switching means, and a coil of the third power supply switching means. A first power supply switching means is provided on the connection circuit between the second contact of the second power supply switching means and the coil of the third power supply switching means. The operation control unit outputs the switching drive signal to the first power supply switching means. The first power supply switching means cuts off the power supply to the coil of the third power supply switching means, and when the second contact of the third power supply Switch means opens, the power supply to at least one of the drive device and the brake device is cut off.

[0011] Also, in the elevator device according to the present invention, the operation control unit outputs the soundness confirmation command at predetermined intervals.

[0012] Also, the method for confirming the soundness of the door-opening travel protection device of the elevator device according to the present invention includes: the operation control unit monitors the operation status of the third power supply switching means and outputs the switching drive signal for opening the connection circuit with the drive device or the brake device to the third power supply switching means; the operation control unit outputs a soundness confirmation command for diagnosing the soundness of the second power supply switching means to the door-opening travel protection unit; the door-opening travel protection unit monitors the operation status of the second power supply switching means and outputs the door-opening travel protection signal to the second power supply switching means based on the soundness confirmation command; and the step of executing a door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means by comparing the operation status of the second power supply switching means and the door-opening travel protection signal. [Effect of the Invention]

[0013] According to the elevator device of the present invention, the operation control unit does not determine an abnormal state by the self-diagnosis process of the door-opening travel protection device. [Brief Description of the Drawings]

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

[0015] In each drawing, the dimensions of the components may be enlarged or reduced with respect to the actual dimensions for ease of understanding, for example, and the dimensional ratios between the drawings may not match. In each drawing, a part of the components may be omitted for ease of understanding, for example.

[0016] Hereinafter, an embodiment of the elevator device according to the present invention will be described with reference to FIGS. 1 and 2. Also, an embodiment of the self-diagnosis process of the door-opening travel protection device of the elevator device according to the present invention will be described with reference to FIG. 3. The following embodiments are exemplified to assist in understanding the configuration of the elevator device and do not limit the configuration of the elevator device.

[0017] FIG. 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention. As shown in FIG. 1, the elevator apparatus 1 includes, for example, an elevator car 2 for a person (passenger) to ride in, a main rope 8 connected to the elevator car 2, a counterweight 9 connected to the main rope 8, a driving device 4 that drives the main rope 8 to move the elevator car 2 and the counterweight 9 in the vertical direction D3, and a braking device 5 that is fastened when the elevator car 2 stops.

[0018] In each figure, the first direction D1 is a first lateral direction D1 that is parallel to the horizontal direction, the second direction D2 is a second lateral direction D2 that is parallel to the horizontal direction and orthogonal to the first lateral direction D1, and the third direction D3 is a vertical direction that is orthogonal to the first lateral direction D1 and the second lateral direction D2, and is the vertical direction D3. Note that, for example, the direction in which a person gets on and off the elevator car 2 may be the first lateral direction D1.

[0019] The driving device 4 is driven by a motor 12. Also, one end of the main rope 8 driven by the driving device 4 is fixed to a part near the top of the hoistway X1, wound around a drive sheave (not shown) of the driving device 4 via a car sheave 10 provided on the elevator car 2, and further fixed to the other end to a part near the top of the hoistway X1 via a counterweight sheave 11 provided on the counterweight 9. In the present embodiment, the driving device 4 is driven by the motor 12, but the driving means is not limited to the motor 12. For example, the driving means may be a linear drive method or a hydraulic drive method.

[0020] In the present embodiment, the driving device 4 is disposed inside the hoistway X1, but the configuration is not limited thereto. The driving device 4 may be disposed in a machine room provided above the hoistway X1. Also, in the present embodiment, the driving device 4 is installed near the top of the hoistway X1, but the configuration is not limited thereto. The driving device 4 may be installed near the bottom of the hoistway X1 or near the landing on the lowest floor.

[0021] In addition, in the present embodiment, although the end of the main rope 8 is fixed to a part near the top of the hoistway X1, the configuration is not limited to this. One end of the main rope 8 may be fixed to the elevator car 2, and the other end may be fixed to the counterweight 9.

[0022] As shown in FIG. 1, car position detecting means 7 for detecting the position of the elevator car 2 in the hoistway X1 may be provided by detecting, with a sensor provided in the elevator car 2, a plate provided near the landing of the hoistway X1. In addition, the elevator car 2 may be provided with door opening / closing detecting means 6 for monitoring the opening / closing state of the car door 32 inside the elevator door 3. In addition, each landing 13 may be provided with door opening / closing detecting means 6 for monitoring the opening / closing state of the landing door 31 inside the elevator door 3.

[0023] An operation control unit 14 for controlling the drive device 4 and the brake device 5 during normal operation of the elevator car 2 may be connected to the drive device 4 and the brake device 5. In addition, a door-opening running protection unit 15 for monitoring door-opening running and cutting off the power supply to at least one of the drive device 4 and the brake device 5 when door-opening running occurs may be connected to the drive device 4 and the brake device 5. Note that the brake device 5 may be one that brakes the rotation of the sheave of the drive device 4, or may be a rope brake that brakes the running of the main rope 8. For example, as a brake device 5 that brakes the rotation of the sheave of the drive device 4, a disk brake type brake device 5 that sandwiches a disk coaxial with the sheave with brake shoes may be used, or a drum type brake device 5 that presses a brake shoe against the inside or outside of a drum coaxial with the sheave may be used. Also, for example, as a device that brakes the main rope 8, a rope brake that sandwiches the main rope 8 with brake shoes may be used.

[0024] Figure 2 is a schematic block diagram of an elevator apparatus 1 according to an embodiment of the present invention. In Figure 2 (the same applies to Figure 4), the contacts and coils of the first power supply switching means 18 and the second power supply switching means 17 are appropriately omitted. Further, the operation control unit 14 and the door-opening travel protection unit 15 according to the present invention are configured by a circuit or the like in a control panel (not shown). Note that the door-opening travel protection unit 15 constitutes a part of the door-opening travel protection device, outputs signals to each unit, and suppresses door-opening travel.

[0025] The elevator apparatus 1 according to the present invention includes an operation control unit 14 that controls the ascending and descending of the elevator car 2 and a door-opening travel protection unit 15 that controls the elevator apparatus 1 so as to suppress door-opening travel. Further, the drive device 4 and the brake device 5 are connected to the power supply 16. The power of the power supply 16 may be supplied to the motor 12 of the drive device 4 and the coil of the brake device 5 or the like.

[0026] In the elevator apparatus 1 according to an embodiment of the present invention, a third power supply switching means 19 may be provided on the circuit between the power supply 16 and the drive device 4 or the brake device 5. The third power supply switching means 19 is, for example, an electromagnetic contactor. The electromagnetic contactor used for the third power supply switching means 19 may be a contactor having a plurality of contacts and coils, or may be a relay. The third power supply switching means 19 has at least a first contact 191 of the third power supply switching means, a second contact 193 of the third power supply switching means, and a coil 192 of the third power supply switching means.

[0027] Further, in the elevator apparatus 1 according to an embodiment of the present invention, a second power supply switching means 17 may be provided on the circuit between the power supply 16 and the third power supply switching means 19. The second power supply switching means 17 is, for example, an electromagnetic contactor. The electromagnetic contactor used for the second power supply switching means 17 may be a contactor having a plurality of contacts and coils, or may be a relay. The second power supply switching means 17 has at least a first contact 171 of the second power supply switching means and a second contact 172 of the second power supply switching means, and controls the power supply to and cutoff from the third power supply switching means 19 based on the door-opening travel protection signal of the door-opening travel protection unit 15, and controls the supply of power from the power supply 16 to the drive device 4 or the brake device 5.

[0028] Further, in the elevator apparatus 1 according to an embodiment of the present invention, a contact of the first power supply switching means 18 may be provided on the circuit between the second contact 172 of the second power supply switching means and the coil 192 of the third power supply switching means. The first power supply switching means 18 is, for example, an electromagnetic contactor. The electromagnetic contactor used for the first power supply switching means 18 may be a contactor having a plurality of contacts and a coil, or may be a relay. The first power supply switching means 18 controls the power supply to and cutoff from the third power supply switching means 19 based on the switching drive signal of the operation control unit 14, and controls the supply of power from the power supply 16 to the drive device 4 or the brake device 5.

[0029] In the elevator apparatus 1 according to an embodiment of the present invention, the first power supply switching means 18, the second power supply switching means 17, and the third power supply switching means 19 may be a contactor having a plurality of contacts and a coil, or may be a relay. However, it is preferable that the first power supply switching means 18 and the second power supply switching means 17 are relays having a plurality of contacts and a coil, and the third power supply switching means 19 is a contactor having a plurality of contacts and a coil. According to such a configuration, by using relays for the first power supply switching means 18 and the second power supply switching means 17, it becomes possible to select an electromagnetic contactor with a small current capacity. On the other hand, by using a contactor for the third power supply switching means 19, it becomes possible to supply and cutoff the power of the drive device 4 or the brake device 5 that requires a large current capacity.

[0030] Here, the first power supply switching means 18 does not directly supply and cutoff the power supply from the power supply 16 to the drive device 4 or the brake device 5. For example, when the contact of the first power supply switching means 18 is opened, the power supply to the coil 192 of the third power supply switching means is cutoff. As a result, the second contact 193 of the third power supply switching means provided on the circuit between the power supply 16 and the drive device 4 or the brake device 5 is opened, and the power supply from the power supply 16 to the drive device 4 or the brake device 5 is cutoff.

[0031] Further, the second power supply switching means 17 does not directly supply or cut off the power supply from the power supply 16 to the drive device 4 or the brake device 5. For example, when the second contact 172 of the second power supply switching means is opened, the power supply to the coil 192 of the third power supply switching means is cut off. As a result, the second contact 193 of the third power supply switching means provided on the circuit between the power supply 16 and the drive device 4 or the brake device 5 is opened, and the power supply from the power supply 16 to the drive device 4 or the brake device 5 is cut off.

[0032] The operation control unit 14 performs feedback control on the third power supply switching means 19 by monitoring the first contact 191 of the third power supply switching means. Further, the door-opening travel protection unit 15 performs feedback control on the second power supply switching means 17 by monitoring the first contact 171 of the second power supply switching means.

[0033] Next, a method for confirming the soundness (presence or absence of failure) of the second power supply switching means in the elevator apparatus 1 according to the present invention will be described with reference to FIGS. 2 and 3. The operation control unit 14 incorporates, for example, a timer circuit and measures the elapsed time since the door-opening travel protection unit 15 last confirmed the soundness of the second power supply switching unit 17. Then, it is determined whether or not the elapsed time has passed a predetermined period (step: S1). The predetermined period is, for example, one day. If the predetermined period has not passed, the process returns to the start (NO in step S1). If the operation control unit 14 determines that the predetermined period has passed (YES in step S1), it outputs a switching drive signal to the first power supply switching means 18 (step: S2) and opens the contact of the first power supply switching means 18 (step: S3). When the contact of the first power supply switching means 18 is opened, the power supply to the coil 192 of the third power supply switching means is cut off, and the second contact 193 of the third power supply switching means is opened (step: S4). As a result, the power supply to at least one of the drive device 4 and the brake device 5 is cut off (step: S5).

[0034] Next, the operation control unit 14 outputs a soundness confirmation command to the door-opening travel protection unit 15 (step: S6). Upon receiving the soundness confirmation command, the door-opening travel protection unit 15 outputs a door-opening travel protection signal to the second power supply switching means 17, and opens the second contact 172 of the second power supply switching means 17 (step: S7). The door-opening travel protection unit 15 compares the feedback signal obtained by monitoring the first contact 171 of the second power supply switching means with the output status of the door-opening travel protection signal, and confirms the soundness of the second power supply switching means 17 (step: S8).

[0035] If the feedback signal obtained by monitoring the first contact 171 of the second power supply switching means and the output status of the door-opening travel protection signal match, it is determined that the second power supply switching means 17 is operating normally, and the process returns to the start (NO in step: S9). On the other hand, if the feedback signal obtained by monitoring the first contact 171 of the second power supply switching means and the output status of the door-opening travel protection signal do not match (YES in step: S9), it is determined that the second power supply switching means 17 has failed (step: S10).

[0036] [1] As described above, the elevator device 1 according to the present invention is an elevator device 1 having a door-opening travel protection device that suppresses door-opening travel, an elevator car 2 provided in the hoistway X1, an elevator door 3 that opens and closes the elevator entrance and exit, a drive device 4 that applies a driving force to the elevator car 2, a brake device 5 that brakes the ascent and descent of the elevator car 2 and generates a braking force when power supply from the power source 16 is cut off, door opening / closing detection means 6 that detects the open / closed state of the elevator door 3, car position detection means 7 that detects the position of the elevator car 2 in the hoistway X1, an operation control unit 14 that controls the operation of the elevator car 2, It is configured independently of the operation control unit 14, and can detect the door-opening travel of the elevator car 2 by monitoring the position of the elevator car 2 and the opening / closing state of the elevator door 3 via the door opening / closing detection means 6 and the car position detection means 7. When the door-opening travel of the elevator car 2 is detected, a door-opening travel protection unit 15 that stops the door-opening travel of the elevator car 2, A third power supply switching means 19 that opens the connection circuit between the power supply 16 and the drive device 4 or the brake device 5 based on the switching drive signal output from the operation control unit 14, A second power supply switching means 17 that causes the third power supply switching means 19 to open the connection circuit between the power supply 16 and the drive device 4 or the brake device 5 based on the door-opening travel protection signal output from the door-opening travel protection unit 15 and is provided with The operation control unit 14 monitors the operation status of the third power supply switching means 19, outputs the switching drive signal for opening the connection circuit between the third power supply switching means 19 and the drive device 4 or the brake device 5, and then outputs a soundness confirmation command for diagnosing the soundness of the second power supply switching means 17 to the door-opening travel protection unit 15. The door-opening travel protection unit 15 monitors the operation status of the second power supply switching means 17, outputs the door-opening travel protection signal to the second power supply switching means 17 based on the soundness confirmation command, and executes a door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means 17 by comparing the operation status of the second power supply switching means 17 with the door-opening travel protection signal.

[0037] According to such a configuration, before the door-opening travel protection unit 15 opens the connection circuit between the power source 16 and the drive device 4 or the brake device 5 via the third power supply switching means 19 through the second power supply switching means 17 based on the soundness confirmation command, the operation control unit 14 monitors the operation status of the third power supply switching means 19 and outputs a switching drive signal for cutting off the power supply to at least one of the drive device 4 and the brake device 5 to the third power supply switching means 19. Therefore, even if the connection circuit between the power source 16 and the drive device 4 or the brake device 5 is opened through the third power supply switching means 19 by the second power supply switching means 17, the operation control unit 14 will not erroneously determine that the third power supply switching means 19 is faulty.

[0038] [2] Further, in the elevator apparatus 1 according to the present invention, the second power supply switching means 17 is an electromagnetic contactor having a first contact 171 of the second power supply switching means and a second contact 172 of the second power supply switching means, By closing or opening the second contact 172 of the second power supply switching means, the power supply to and cutoff from at least one of the drive device 4 and the brake device 5 are switched by the third power supply switching means 19, The closing and opening of the first contact 171 of the second power supply switching means are monitored, and by confirming the consistency with the output status of the door-opening travel protection signal, the door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means 17 is executed.

[0039] According to such a configuration, with one electromagnetic contactor (the second power supply switching means 17), it is possible to switch the power supply to and cutoff from at least one of the drive device 4 and the brake device 5, and the door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means 17 can be executed.

[0040] [3] Further, in the elevator apparatus 1 according to the present invention, the third power supply switching means 19 is an electromagnetic contactor having a first contact 191 of the third power supply switching means, a second contact 193 of the third power supply switching means, and a coil 192 of the third power supply switching means, A first power supply switching means 18 is provided on the connection circuit between the second contact 172 of the second power supply switching means and the coil 192 of the third power supply switching means. The operation control unit 14 outputs the switching drive signal to the first power supply switching means 18. The first power supply switching means 18 cuts off the power supply to the coil 192 of the third power supply switching means. The third power supply Switch When the second contact 193 of the means is opened, the power supply to at least one of the drive device 4 and the brake device 5 is cut off.

[0041] According to such a configuration, by outputting a switching drive signal to the first power supply switching means 18, which is an electromagnetic contactor (for example, a relay) with a small capacity, the drive device 4 and the brake device 5 can be powered on and off by the third power supply switching means 19, which is an electromagnetic contactor (for example, a contactor) with a large capacity.

[0042] [4] In addition, in the elevator device 1 according to the present invention, the operation control unit 14 outputs the soundness confirmation command at regular intervals.

[0043] According to such a configuration, it is possible to execute a door-opening travel protection device soundness confirmation process for periodically diagnosing the door-opening travel protection device of the second power supply switching means 17, so that the soundness of the door-opening travel protection unit 15 can be maintained.

[0044] [5] In addition, the method for confirming the soundness of the door-opening travel protection device of the elevator device 1 according to the present invention is the elevator device 1 described in [1], wherein the operation control unit 14 monitors the operation status of the third power supply switching means 19 and outputs the switching drive signal for opening the connection circuit between the third power supply switching means 19 and the drive device 4 or the brake device 5 to the third power supply switching means 19 in step S2. The operation control unit 14 outputs a soundness confirmation command for diagnosing the soundness of the second power supply switching means 17 to the door-opening travel protection unit 15 in step S6. The door-opening travel protection unit 15 monitors the operating status of the second power supply switching means 17, and outputs the door-opening travel protection signal to the second power supply switching means 17 based on the soundness confirmation command in step S7, and has step S8 of executing a door-opening travel protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means 17 by comparing the operating status of the second power supply switching means 17 with the door-opening travel protection signal.

[0045] According to such a configuration, before the door-opening travel protection unit 15 releases the connection circuit between the power supply 16 and the drive device 4 or the brake device 5 via the third power supply switching means 19 through the second power supply switching means 17 based on the soundness confirmation command, the operation control unit 14 monitors the operating status of the third power supply switching means 19 and outputs a switching drive signal for cutting off the power supply to at least one of the drive device 4 and the brake device 5 to the third power supply switching means 19. Therefore, even if the connection circuit between the power supply 16 and the drive device 4 or the brake device 5 is released through the third power supply switching means 19 by the second power supply switching means 17, the operation control unit 14 does not erroneously determine that the third power supply switching means 19 is faulty.

[0046] Note that the elevator device and the method for confirming the soundness of the door-opening travel protection device of the elevator device according to the present invention are not limited to the configurations of the above-described embodiments, nor are they limited to the above-described effects. Also, the elevator device and the method for confirming the soundness of the door-opening travel protection device of the elevator device can be variously modified without departing from the gist of the present invention. For example, it goes without saying that one or more of the configurations and methods according to the following various modification examples can be arbitrarily selected and adopted in the configurations and methods according to the above-described embodiments.

[0047] (A) In the elevator apparatus 1 according to the above embodiment, the third power supply switching means 19 is an electromagnetic contactor having a first contact 191 of the third power supply switching means, a second contact 193 of the third power supply switching means, and a coil 192 of the third power supply switching means. The first power supply switching means 18 is provided on the connection circuit between the second contact 172 of the second power supply switching means and the coil 192 of the third power supply switching means. The operation control unit 14 outputs the switching drive signal to the first power supply switching means 18. The first power supply switching means 18 cuts off the power supply to the coil 192 of the third power supply switching means, and the second contact 193 of the third power supply Switch means is opened, thereby cutting off the power supply to at least one of the drive device 4 and the brake device 5. However, the elevator apparatus 1 is not limited to such a configuration.

[0048] For example, as shown in FIG. 4, the operation control unit 14 directly outputs a switching drive signal to the third power supply switching means 19. The third power supply switching means 19 opens the second contact 193 of the third power supply switching means, thereby cutting off the power supply to at least one of the drive device 4 and the brake device 5. Of course, the same effect can be obtained.

[0049] (B) Further, in the elevator apparatus 1 according to the above embodiment, the operation control unit 14 and the door-opening travel protection unit 15 are described separately, but they may be configured to operate the operation control unit 14 and the door-opening travel protection unit 15 in one control device.

[0050] (C) Further, when the elevator apparatus 1 according to the above embodiment performs the door-opening travel protection device soundness confirmation process, it incorporates a timer circuit, measures the elapsed time since the previous door-opening travel protection unit 15 confirmed the soundness of the second power supply switching unit 17, determines whether the elapsed time has passed a predetermined period, and when the predetermined period has passed, outputs a switching drive signal from the operation control unit 14 to the first power supply switching means 18 and outputs a door-opening travel protection signal from the door-opening travel protection unit 15. However, the elevator apparatus 1 is not limited to such a configuration.

[0051] For example, when performing the verification process of the soundness of the door-opening travel protection device, a switching drive signal may be output from the monitoring center to the first power supply switching means 18, or a soundness verification command may be output from the monitoring center to the door-opening travel protection unit 15. Also, a switching drive signal may be output to the first power supply switching means 18, or a soundness verification command may be output to the door-opening travel protection unit 15 by means of various switches provided on the maintenance staff's mobile terminal or the elevator 1.

[0052] (D) Further, the first power supply switching means 18, the first contact 171 of the second power supply switching means, the second contact 172 of the second power supply switching means, the first contact 191 of the third power supply switching means, and the second contact 193 of the third power supply switching means may be make contacts that are in a closed state during operation or break contacts that are in an open state during operation.

[0053] (F) Note that, for example, in the apparatus shown in the claims, the specification, and the drawings, the execution order of each process such as operations, procedures, steps, and stages can be realized in any order as long as the result of the previous process is not used in the subsequent process. For example, even if described for convenience using "first", "next", etc., it does not mean that it is essential to execute in this order.

Explanation of Reference Numerals

[0054] 1... elevator device, 2... elevator car, 3... elevator door, 31... landing door, 32... car door, 4... drive device, 5... brake device, 6... door opening / closing detection means, 7... car position detection means, 8... main rope, 9... counterweight, 10... car sheave, 11... counterweight sheave, 12... motor, 13... landing, 14... operation control unit, 15... door-opening travel protection unit, 16... power supply, 17... second power supply switching means (second contactor), 171... first contact of the second power supply switching means, 172... second contact of the second power supply switching means, 18... first power supply switching means (first contactor), 19... third power supply switching means (third contactor), 191... first contact of the third power supply switching means, 192... coil of the third power supply switching means, 193... second contact of the third power supply switching means, X1... hoistway, D1... first lateral direction, D2... second lateral direction, D3... vertical direction

Claims

1. An elevator apparatus having a door-open running protection device for suppressing door-open running, an elevator car provided in the hoistway; An elevator door that opens and closes the elevator entrance; a drive device that provides a driving force to the elevator car; a brake device that brakes the lifting and lowering of the elevator car and generates a braking force when power supply from a power source is cut off; a door opening / closing detection means for detecting an opening / closing state of the elevator door; a car position detection means for detecting a position of the elevator car within the hoistway; An operation control unit that controls the operation of the elevator car; a door-open running protection unit that is configured independently of the operation control unit, that is capable of detecting running of the elevator car with the door open by monitoring the position of the elevator car and the open / closed state of the elevator doors via the door-opening detection means and the car position detection means, and that stops running of the elevator car with the door open when running of the elevator car with the door open is detected; a third power supply switching means for opening a connection circuit between the power source and the drive device or the brake device based on a switching drive signal output from the operation control unit; a second power supply switching means for causing the third power supply switching means to open a connection circuit between the power source and the drive device or the brake device based on a door-open running protection signal output from the door-open running protection unit; Equipped with The second power supply switching means is an electromagnetic contactor having a first contact of the second power supply switching means and a second contact of the second power supply switching means, by closing or opening a second contact of the second power supply switching means, the third power supply switching means switches between supplying and cutting off power to at least one of the drive device and the brake device; The operation control unit monitors the operation status of the third power supply switching means, outputs the switching drive signal to the third power supply switching means to open a connection circuit with the drive device or the brake device, and outputs a soundness confirmation command to the door open running protection unit to diagnose the soundness of the second power supply switching means, The door-open running protection unit monitors an operation status of the second power supply switching means and outputs the door-open running protection signal to the second power supply switching means based on the soundness confirmation command. A door-open running protection device soundness confirmation process is executed to diagnose the soundness of the second power supply switching means by monitoring the closing / opening of the first contact of the second power supply switching means and confirming the consistency with the output state of the door-open running protection signal. Elevator equipment.

2. the third power supply switching means is an electromagnetic contactor having a first contact of the third power supply switching means, a second contact of the third power supply switching means, and a coil of the third power supply switching means, a first power supply switching means on a connection circuit between the second contact of the second power supply switching means and a coil of the third power supply switching means; The operation control unit outputs the switching drive signal to the first power supply switching means, The first power supply switching means cuts off the power supply to the coil of the third power supply switching means, When the second contact of the third power supply switching means is opened, power supply to at least one of the drive device and the brake device is cut off.

2. The elevator system of claim 1.

3. The operation control unit outputs the soundness check command at predetermined intervals. An elevator installation according to claim 1 or 2.

4. 2. The elevator system according to claim 1, the operation control unit monitors an operation status of the third power supply switching means and outputs the switching drive signal to the third power supply switching means to open a connection circuit between the driving device or the braking device; The operation control unit outputs a health check command to the door-open running protection unit to diagnose the health of the second power supply switching means; The door-open running protection unit monitors an operation status of the second power supply switching means and outputs the door-open running protection signal to the second power supply switching means based on the health confirmation command. and executing a door-open running protection device health confirmation process for diagnosing the health of the second power supply switching means by comparing an operating status of the second power supply switching means with the door-open running protection signal. A method for verifying the integrity of a door-open running protection device for an elevator system.

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