Elevator device and method for verifying integrity of door-open running protection device for elevator device

Abstract

To provide an elevator device in which an operation control unit does not determine an abnormal state through self-diagnosis processing of a door-open running protection device.SOLUTION: An operation control unit 14 monitors the operating status of third power supply switching means 19, and outputs a switching drive signal to the third power supply switching means 19 to open the connection circuit with a drive unit 4 or a brake unit 5, and then outputs a health check command to the door-open running protection unit 15 to diagnose the health of second power supply switching means 17. The door-open running protection unit 15 monitors the operating status of the second power supply switching means 17, and outputs a door-open running protection signal to the second power supply switching means 17 based on the health check command, and executes health check processing of the door-open running protection device to diagnose the health of the second power supply switching means 17 by comparing the operating status of the second power supply switching means 17 with the door-open running protection signal.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an elevator system having a door-open running protection device that suppresses elevator running with the doors open, and a method for verifying the integrity of the door-open running protection device of the elevator system. [Background technology]

[0002] In recent years, elevators have been equipped with a door-open running protection device (door-open running protection unit) as a safety feature. The door-open running protection device has a protection function to stop the elevator car from running when it detects a situation where the elevator car starts running without closing the doors while the doors are open, or when the elevator car is running with at least one of the car doors or landing doors open (door-open running). Specifically, a door-open running protection unit is provided in addition to an operation control unit that controls the operation of the elevator car and switches between supplying and cutting off power to the drive unit and brake unit. The door-open running protection unit detects the elevator car running with the door open via a car position detection means that detects the position of the elevator car in the hoistway and a door opening / closing detection means that detects the opening and closing of the car door or landing door, and cuts off the power supply to at least one of the drive unit and brake unit to stop the elevator car running and suppress running with the door open.

[0003] The operation control unit is provided with a first power supply switching means that switches between supplying and cutting off power in response to a command from the operation control unit, and cuts off the power supply to at least one of the drive device and the brake device using another third power supply switching means that operates in response to the supplying and cutting off of power by the first power supply switching means, and also monitors the soundness of the third power supply switching means by monitoring another contact of the third power supply switching means. The door-open running protection device also has a second power supply switching means that switches between supplying and cutting off power in response to a command from the door-open running protection device, and cuts off the power supply to at least one of the drive device and the brake device using a third power supply switching means that operates in response to the supplying and cutting off of power by the second power supply switching means, and also monitors the soundness of the second power supply switching means by monitoring another contact of the second power supply switching means.

[0004] Incidentally, the operation control unit and the door-open running protection device may perform a self-diagnosis process to diagnose the soundness of their own functions in order to perform operations related to safety. However, because the door-open running protection device performs self-diagnosis processing without coordinating 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 unit and the brake unit has been cut off due to the self-diagnosis processing by the door-open running protection device is abnormal.

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

[0006] [Patent Document 1] Patent No. 5349590 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, an object of the present invention is to provide an elevator system in which the operation control unit does not determine that an abnormal state exists through the self-diagnosis process of the door-open running protection device. [Means for solving the problem]

[0008] The elevator apparatus according to the present invention is an elevator apparatus having a door-open running protection device that suppresses door-open running, and includes an elevator car provided in a hoistway, elevator doors that open and close an elevator entrance, a drive device that applies drive force to the elevator car, a brake device that brakes the elevator car's ascent and descent and generates a braking force when power supply from a power source is cut off, door-open / closed detection means that detects the open / closed state of the elevator doors, car position detection means that detects the position of the elevator car in 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 and that is capable of detecting the elevator car's door-open running by monitoring the elevator car position and the open / closed state of the elevator doors via the door-open / closed detection means and the car position detection means, and that stops the elevator car's door-open running when the elevator car's door-open running is detected, and and a second power supply switching means that causes the third power supply switching means to open the connection circuit between the power supply and the drive device or the brake device based on a door-open running protection signal output from the door-open running protection unit, wherein the operation control unit monitors the operating status of the third power supply switching means, and outputs the switching drive signal to the third power supply switching means to open the connection circuit between the drive device or the brake device, and then outputs a health confirmation command to the door-open running protection unit to diagnose the health of the second power supply switching means, and the door-open running protection unit monitors the operating 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 executes a door-open running protection device health confirmation process that diagnoses the health of the second power supply switching means by comparing the operating status of the second power supply switching means with the door-open running 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, 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, and by monitoring the closing and opening of the first contact of the second power supply switching means and confirming consistency with the output status of the door-open running protection signal, the door-open running protection device health confirmation process is executed to diagnose the health of the second power supply switching means.

[0010] Furthermore, in the elevator apparatus 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, and the first power supply switching means is provided on a connection circuit between the second contact of the second power supply switching means and the coil of the third power supply switching means, and the operation control unit outputs the switching drive signal to the first power supply switching means, and the first power supply switching means cuts off the power supply to the coil of the third power supply switching means and cuts off the power supply to at least one of the drive device and the brake device by opening the second contact of the third power supply means.

[0011] In the elevator apparatus according to the present invention, the operation control unit outputs the soundness check command at predetermined intervals.

[0012] Furthermore, the method for confirming the health of a door-open running protection device for an elevator apparatus according to the present invention includes the steps of: the operation control unit monitoring an operating status of the third power supply switching means, and outputting the switching drive signal to the third power supply switching means to open a connection circuit with the drive device or the brake device; the operation control unit outputting a health confirmation 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 monitoring the operating status of the second power supply switching means, and outputting 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 to diagnose the health of the second power supply switching means by comparing the operating status of the second power supply switching means with the door-open running protection signal. [Effects of the Invention]

[0013] According to the elevator apparatus of the present invention, the self-diagnosis process of the door-open running protection device prevents the operation control unit from determining that an abnormal state has occurred. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic configuration diagram of an elevator apparatus according to an embodiment of the present invention; [Figure 2] 1 is a schematic block diagram of an elevator apparatus according to an embodiment of the present invention; [Figure 3] FIG. 2 is a flowchart of a self-diagnosis process of the door-open running protection device of the elevator apparatus according to the embodiment of the present invention. [Figure 4] FIG. 4 is a schematic block diagram of an elevator system according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] In each drawing, the dimensions of the components may be enlarged or reduced relative to the actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. Note that in each drawing, for example, to facilitate understanding, some of the components may be omitted.

[0016] An embodiment of an elevator apparatus according to the present invention will be described below with reference to Figures 1 and 2. Also, an embodiment of a self-diagnosis process for a door-open running protection device of an elevator apparatus according to the present invention will be described with reference to Figure 3. Note that the following embodiment is provided as an example to help understand the configuration of the elevator apparatus, and is not intended to limit the configuration of the elevator apparatus.

[0017] Fig. 1 is a schematic configuration diagram of an elevator apparatus according to one embodiment of the present invention. As shown in Fig. 1, the elevator apparatus 1 may include, for example, an elevator car 2 for people (passengers) to ride in, a main rope 8 connected to the elevator car 2, a counterweight 9 connected to the main rope 8, a drive device 4 that drives the main rope 8 to cause the elevator car 2 and the counterweight 9 to travel in the up-down direction D3, and a brake device 5 that engages when the elevator car 2 stops.

[0018] In each figure, the first direction D1 is a first horizontal direction D1 that is parallel to the horizontal direction, the second direction D2 is a second horizontal direction D2 that is parallel to the horizontal direction and perpendicular to the first horizontal direction D1, and the third direction D3 is a vertical direction that is perpendicular to the first horizontal direction D1 and the second horizontal direction D2, that is, the up-down direction D3. Note that, for example, the direction in which people get on and off the elevator car 2 may be the first horizontal direction D1.

[0019] The drive unit 4 is driven by a motor 12. One end of a main rope 8 driven by the drive unit 4 is fixed to a part near the top of the hoistway X1, passes through a car sheave 10 provided on the elevator car 2, is wound around a drive sheave (not shown) of the drive unit 4, passes through a counterweight sheave 11 provided on the counterweight 9, and is again fixed at the other end to a part near the top of the hoistway X1. In this embodiment, the drive unit 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 type or a hydraulic drive type.

[0020] In this embodiment, the drive unit 4 is disposed inside the hoistway X1, but the present invention is not limited to this configuration. The drive unit 4 may also be disposed in a machine room provided above the hoistway X1. Furthermore, in this embodiment, the drive unit 4 is installed near the top of the hoistway X1, but the present invention is not limited to this configuration. The drive unit 4 may also be installed near the bottom of the hoistway X1 or near the landing on the lowest floor.

[0021] In addition, in this embodiment, the ends of the main ropes 8 are fixed to a part near the top of the hoistway X1, but this configuration is not limited to this. One end of the main ropes 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, a car position detection means 7 may be provided that detects the position of the elevator car 2 within the hoistway X1 by using a sensor provided on the elevator car 2 to detect a plate provided near the landing of the hoistway X1. The elevator car 2 may also be provided with a door open / close detection means 6 for monitoring the open / closed state of the car door 32 among the elevator doors 3. Further, each landing 13 may be provided with a door open / close detection means 6 for monitoring the open / closed state of landing doors 31 among the elevator doors 3.

[0023] An operation control unit 14 that controls the drive unit 4 and the brake unit 5 during normal operation of the elevator car 2 may be connected to the drive unit 4 and the brake unit 5. The drive unit 4 and the brake unit 5 may also be connected to a door-open running protection unit 15 that monitors door-open running and cuts off power supply to at least one of the drive unit 4 and the brake unit 5 when door-open running occurs. The brake unit 5 may brake the rotation of the sheave of the drive unit 4, or may be a rope brake that brakes the running of the main rope 8. For example, the brake unit 5 may be a disc brake type that brakes the rotation of the sheave of the drive unit 4 by clamping a disc coaxial with the sheave with a brake shoe, or may be a drum type that brakes by pressing a brake shoe against the inside or outside of a drum coaxial with the sheave. The brake unit 5 may also be a rope brake that brakes the main rope 8 by clamping the main rope 8 with a brake shoe.

[0024] Figure 2 is a schematic block diagram of an elevator apparatus 1 according to one embodiment of the present invention. In Figure 2 (and also in Figure 4), the contacts and coils of the first power supply switching means 18 and the second power supply switching means 17 are omitted as appropriate. The operation control unit 14 and the door-open running protection unit 15 according to the present invention are configured by circuits and the like in a control panel (not shown). The door-open running protection unit 15 configures part of the door-open running protection device, outputs signals to each unit, and suppresses running with the door open.

[0025] The elevator apparatus 1 according to the present invention includes an operation control unit 14 that controls the elevation of the elevator car 2 and a door-open running protection unit 15 that controls the elevator apparatus 1 to suppress door-open running. The drive unit 4 and the brake unit 5 are connected to a power source 16. Electric power from the power source 16 may be supplied to the motor 12 of the drive unit 4 and the coils of the brake unit 5, etc.

[0026] The elevator system 1, which is one embodiment of the present invention, may be provided with a third power supply switching means 19 on the circuit between the power supply 16 and the drive unit 4 or the brake unit 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 a coil, 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] Furthermore, the elevator apparatus 1 according to one embodiment of the present invention may include a second power supply switching means 17 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 a coil, 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 supply and cut-off of power to the third power supply switching means 19 based on a door-open running protection signal from the door-open running protection unit 15, thereby controlling the supply of power from the power supply 16 to the drive unit 4 or the brake unit 5.

[0028] Furthermore, in the elevator apparatus 1 according to one 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 supply and cut-off of power to the third power supply switching means 19 based on a switching drive signal from the operation control unit 14, and controls the supply of power from the power source 16 to the drive unit 4 or the brake unit 5.

[0029] In the elevator system 1 according to one 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 contactors having a plurality of contacts and coils or may be relays. 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 coils, and the third power supply switching means 19 is a contactor having a plurality of contacts and coils. With this 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 electromagnetic contactors with a small current capacity, while by using a contactor for the third power supply switching means 19, it becomes possible to supply and cut off power to the drive unit 4 or the brake unit 5, which require a large current capacity.

[0030] Here, the first power supply switching means 18 does not directly supply or cut off the supply of power from the power source 16 to the drive unit 4 or the brake unit 5. For example, when the contacts of the first power supply switching means 18 are opened, the supply of power 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 source 16 and the drive unit 4 or the brake unit 5 is opened, and the supply of power from the power source 16 to the drive unit 4 or the brake unit 5 is cut off.

[0031] Furthermore, the second power supply switching means 17 does not directly supply or cut off the supply of power from the power source 16 to the drive unit 4 or the brake unit 5. For example, when the second contact 172 of the second power supply switching means is opened, the supply of power 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 source 16 and the drive unit 4 or the brake unit 5 is opened, and the supply of power from the power source 16 to the drive unit 4 or the brake unit 5 is cut off.

[0032] The operation control unit 14 monitors the first contact 191 of the third power supply switching means to perform feedback control of the third power supply switching means 19. In addition, the door-open running protection unit 15 monitors the first contact 171 of the second power supply switching means to perform feedback control of the second power supply switching means 17.

[0033] Next, a method for checking the soundness (presence or absence of a malfunction) of the second power supply switching means in the elevator system 1 according to the present invention will be described with reference to FIGS. The operation control unit 14, which may have a built-in timer circuit, measures the time elapsed since the door-open running protection unit 15 last confirmed the soundness of the second power supply switching unit 17. Then, it determines whether the elapsed time has exceeded a predetermined period (step S1). The predetermined period is, for example, one day. If the predetermined period has not elapsed, the process returns to start (NO in step S1). If the predetermined period has elapsed (YES in step S1), the operation control unit 14 outputs a switching drive signal to the first power supply switching means 18 (step S2) and opens the contacts of the first power supply switching means 18 (step S3). When the contacts of the first power supply switching means 18 are opened, the supply of power 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 unit 4 and the brake unit 5 is cut off (step S5).

[0034] Next, the operation control unit 14 outputs a soundness check command to the door-open running protection unit 15 (step: S6). Upon receiving the soundness check command, the door-open running protection unit 15 outputs a door-open running 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-open running protection unit 15 compares the consistency of the feedback signal obtained by monitoring the first contact 171 of the second power supply switching means with the output status of the door-open running protection signal, and checks the soundness of the second power supply switching means 17 (step: S8).

[0035] If the feedback signal from monitoring the first contact 171 of the second power supply switching means matches the output status of the door open running protection signal, the second power supply switching means 17 determines that it is operating normally and returns to start (step: NO in S9). On the other hand, if the feedback signal obtained by monitoring the first contact 171 of the second power supply switching means does not match the output status of the door open running protection signal (YES in step S9), the second power supply switching means 17 is determined to be malfunctioning (step S10).

[0036] [1] As described above, the elevator apparatus 1 according to the present invention is an elevator apparatus 1 having a door-open running protection device that suppresses door-open running, an elevator car 2 provided in the elevator shaft X1; an elevator door 3 for opening and closing the elevator entrance; a drive unit 4 that applies a driving force to the elevator car 2; a brake device 5 that brakes the lifting and lowering of the elevator car 2 and generates a braking force when power supply from a power source 16 is cut off; door opening / closing detection means 6 for detecting the opening / closing state of the elevator door 3; a car position detection means 7 for detecting 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; a door-open running protection unit 15 that is configured independently of the operation control unit 14, that is capable of detecting the running of the elevator car 2 with the door open by monitoring the position of the elevator car 2 and the open / closed state of the elevator doors 3 via the door open / close detection means 6 and the car position detection means 7, and that stops the running of the elevator car 2 with the door open when it detects the running of the elevator car 2 with the door open; a third power supply switching means 19 that opens a connection circuit between the power source 16 and the drive device 4 or the brake device 5 based on a 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 a connection circuit between the power source 16 and the drive device 4 or the brake device 5 based on the door-open running protection signal output from the door-open running protection unit 15; Equipped with The operation control unit 14 monitors the operation status of the third power supply switching means 19, and outputs the switching drive signal to the third power supply switching means 19 to open a connection circuit with the drive device 4 or the brake device 5, and then outputs a soundness confirmation command to the door-open running protection unit 15 to diagnose the soundness of the second power supply switching means 17, The door-open running protection unit 15 monitors the operating status of the second power supply switching means 17, and outputs the door-open running protection signal to the second power supply switching means 17 based on the health confirmation command, and executes door-open running protection device health confirmation processing to diagnose the health of the second power supply switching means 17 by comparing the operating status of the second power supply switching means 17 with the door-open running protection signal.

[0037] According to this configuration, before the door-open running protection unit 15 causes the third power supply switching means 19 to open the connection circuit between the power source 16 and the drive unit 4 or the brake unit 5 via the second power supply switching means 17 based on the health 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 to the third power supply switching means 19 to cut off the power supply to at least one of the drive unit 4 and the brake unit 5. Therefore, even if the second power supply switching means 17 opens the connection circuit between the power source 16 and the drive unit 4 or the brake unit 5 via the third power supply switching means 19, the operation control unit 14 will not erroneously determine that the third power supply switching means 19 is faulty.

[0038] [2] In addition, 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 third power supply switching means 19 switches between supplying and cutting off power to at least one of the drive device 4 and the brake device 5; The door-open running protection device health confirmation process is executed to diagnose the health of the second power supply switching means 17 by monitoring the closing and opening of the first contact 171 of the second power supply switching means and confirming the consistency with the output status of the door-open running protection signal.

[0039] According to this configuration, one electromagnetic contactor (second power supply switching means 17) can switch between supplying and cutting off power to at least one of the drive device 4 and the brake device 5, and can also execute the door-open running protection device health confirmation process to diagnose the health of the second power supply switching means 17.

[0040] [3] In addition, 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) on a 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, When the second contact 193 of the third power supply 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 this configuration, by outputting a switching drive signal to the first power supply switching means 18, which is an electromagnetic contactor with a small capacity (for example, a relay), it is possible to switch between supplying and cutting off power to at least one of the drive device 4 and the brake device 5 by the third power supply switching means 19, which is an electromagnetic contactor with a large capacity (for example, a contactor).

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

[0043] According to this configuration, a door-open running protection device health confirmation process can be performed periodically to diagnose the door-open running protection device of the second power supply switching means 17, thereby maintaining the health of the door-open running protection unit 15.

[0044] [5] Furthermore, the method for confirming the soundness of the door-open running protection device of the elevator apparatus 1 according to the present invention is the elevator apparatus 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 to the third power supply switching means 19 to open a connection circuit with the drive device 4 or the brake device 5, step S2; Step S6 in which the operation control unit 14 outputs a soundness confirmation command to the door-open running protection unit 15 to diagnose the soundness of the second power supply switching means 17; Step S7 in which the door-open running protection unit 15 monitors the operation status of the second power supply switching means 17 and outputs the door-open running protection signal to the second power supply switching means 17 based on the soundness confirmation command; The method includes a step S8 of executing a door-open running protection device health confirmation process for diagnosing the health of the second power supply switching means 17 by comparing the operating status of the second power supply switching means 17 with the door-open running protection signal.

[0045] According to this configuration, before the door-open running protection unit 15 causes the third power supply switching means 19 to open the connection circuit between the power source 16 and the drive unit 4 or the brake unit 5 via the second power supply switching means 17 based on the health 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 to the third power supply switching means 19 to cut off the power supply to at least one of the drive unit 4 and the brake unit 5. Therefore, even if the second power supply switching means 17 opens the connection circuit between the power source 16 and the drive unit 4 or the brake unit 5 via the third power supply switching means 19, the operation control unit 14 will not erroneously determine that the third power supply switching means 19 is faulty.

[0046] The elevator system and the method for verifying the integrity of a door-open running protection device for an elevator system 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. Furthermore, the elevator system and the method for verifying the integrity of a door-open running protection device for an elevator system can, of course, be modified in various ways without departing from the spirit of the present invention. For example, it is possible to arbitrarily select one or more of the configurations and methods according to the following various modified examples and adopt them 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, and the first power supply switching means 18 is provided on a 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, and the operation control unit 14 outputs the switching drive signal to the first power supply switching means 18, and 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 means opens, 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 this configuration.

[0048] For example, as shown in FIG. 4, the operation control unit 14 outputs a switching drive signal directly to the third power supply switching means 19, and 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, and of course, the same effect can be obtained.

[0049] (B) Furthermore, the elevator device 1 according to the above embodiment has been described with the operation control unit 14 and the door-open running protection unit 15 being separate units. However, the operation control unit 14 and the door-open running protection unit 15 may be configured to operate within a single control device.

[0050] (C) Furthermore, when performing the door-open running protection device health confirmation process, the elevator apparatus 1 according to the above embodiment has a built-in timer circuit that measures the time that has elapsed since the door-open running protection unit 15 last confirmed the health of the second power supply switching unit 17, determines whether the elapsed time has exceeded a predetermined period, and when the predetermined period has elapsed, outputs a switching drive signal from the operation control unit 14 to the first power supply switching means 18, and outputs a door-open running protection signal from the door-open running protection unit 15. However, the elevator apparatus 1 is not limited to this configuration.

[0051] For example, when performing the door-open running protection device health check process, a switching drive signal may be output from the monitoring center to the first power supply switching means 18, and a health check command may be output from the monitoring center to the door-open running protection unit 15. Alternatively, a switching drive signal may be output to the first power supply switching means 18, and a health check command may be output to the door-open running protection unit 15, using a mobile terminal of a maintenance worker or various switches provided on the elevator 1.

[0052] (D) Furthermore, 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 closed during operation, or may be break contacts that are open during operation.

[0053] (F) For example, the order of execution of each process, such as the operations, procedures, steps, and stages, in the apparatus shown in the claims, specifications, and drawings, can be implemented in any order, as long as the result of a previous process is not used in a subsequent process. For example, even if a description is made using "first," "next," etc. for convenience, this does not mean that the processes must be executed in that order. [Explanation of symbols]

[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 section, 15... door open running protection section, 16... power supply, 17... second power supply switching means (second contactor), 171...first contact of second power supply switching means, 172...second contact of 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 third power supply switching means, 192...coil of third power supply switching means, 193...second contact of third power supply switching means, X1...hoistway, D1...first horizontal direction, D2...second horizontal direction, D3...vertical direction

Claims

1. An elevator apparatus having a door-open running protection device that suppresses door-open running, an elevator car installed 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; door opening / closing detection means for detecting the opening / closing state of the elevator door; car position detection means for detecting the 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 open / close 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 that causes 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 operation control unit monitors the operating 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 with the drive device or the brake device, and then 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 the operation status of the second power supply switching means, outputs the door-open running protection signal to the second power supply switching means based on the health confirmation command, and performs door-open running protection device health confirmation processing to diagnose the health of the second power supply switching means by comparing the operation status of the second power supply switching means with the door-open running protection signal. Elevator equipment.

2. 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 closing / opening of the first contact of the second power supply switching means is monitored, and the output state of the door-open running protection signal is checked for consistency, thereby executing the door-open running protection device soundness confirmation process for diagnosing the soundness of the second power supply switching means.

2. The elevator system of claim 1.

3. 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 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, When the second contact of the third power supply means is opened, power supply to at least one of the drive device and the brake device is cut off.

3. The elevator system of claim 2.

4. The operation control unit outputs the soundness check command at predetermined intervals. An elevator system according to any one of claims 1 to 3.

5. 2. The elevator system according to claim 1, the operation control unit monitors an operating 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 third power supply switching means and the drive device or the brake device; the operation control unit 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; and a step of 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 state of the second power supply switching means with the door-open running protection signal. Method for verifying the integrity of a door-open running protection device in an elevator system.

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