Hatchway door switch circuit

Abstract

The landing door switch circuit of the present disclosure is provided with an upper-car safety circuit (20), an upper-car auxiliary circuit (30), a lower-car safety circuit (40), and a lower-car auxiliary circuit (50). The upper-car safety circuit (20) and the lower-car safety circuit (40) have: a main circuit (20a, 40a) connecting an excitation coil (23b, 24b, 43b, 44b) of an on-off device driving a power source (61) of an upper car (14) and a lower car (18) with a power source (60), and connecting a landing door switch (21, 41) in series; and a first connection portion (22) and a third connection portion (42) branched from the main circuit (20a, 40a). Furthermore, the upper-car auxiliary circuit (30) and the lower-car auxiliary circuit (50) have a second connection portion (31) and a fourth connection portion (51) bypassing the landing door switch (21, 41) in the lower car (18) and the upper car (14), respectively.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a landing door switch circuit applied to a single shaft double-car elevator. BACKGROUND

[0002] Generally, in an elevator, there is a requirement for "a device that cannot raise the car if all the doors of the car and the shaft are not closed" (Japanese domestic law: Article 129, 9 of the Building Standards Law and the Enforcement Order of the Law). Therefore, a landing door switch circuit obtained by connecting in series a switch provided to all the doors of the landing and an interlock has been used. The contact of the interlock is connected to the motor of the hoisting machine, and in the case where all the doors are closed, the contact is closed by energizing the coil of the interlock.

[0003] On the other hand, a single shaft double-car elevator in which a plurality of cars are provided in a vertical direction in one shaft has been proposed. In such an elevator, on the structure, the lower car cannot move to the floors above the floor where the upper car is located, and the upper car cannot move to the floors below the floor where the lower car is located. However, in the case where the switch circuit is used other than the use, even when the door of the landing of the floor where the car of one side cannot move is opened, the car cannot travel.

[0004] In Patent Literature 1, a double-car elevator in which, in the case where the door of the landing of the floor where the car of one side is stopped is opened, a stop detection switch is used to bypass the switch provided to the door of the landing of the stop is disclosed. In this double-car elevator, even in the case where the door of the landing of the floor where the car of one side is stopped is opened, since the switch of the door of the landing of the stop is bypassed, as a result, power is supplied to the motor of the hoisting machine, and therefore, the car of the other side can also travel.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Laid-Open No. 2000-128453 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] However, even in the double-car elevator described in Patent Literature 1, in the case where the door of the landing of the floor other than the floor where the car of one side is stopped is opened, even when the landing where the door is opened is the landing of the floor where the car of the other side cannot move, the car of the other side cannot travel.

[0010] The present disclosure was accomplished in view of the above-described problems, and has an object to provide a landing door switch circuit of a double-car elevator in which a car cannot travel in a case where a door of a landing is opened, in which, even in a case where a door of a landing of a floor to which a car cannot move due to the presence of the car of one side is opened, the car of the other side can travel.

[0011] Means for solving the problem

[0012] The landing door switch circuit of the present disclosure is applied to an elevator device having an upper car and a lower car in one hoistway, and having a plurality of landing doors for going and returning between the upper car or the lower car and landings set in accordance with each of a plurality of floors, in which the landing door switch circuit includes: an upper car safety circuit having an upper car main circuit connecting an upper car coil and a power supply, and a first connection portion branching from the upper car main circuit in correspondence with a landing in which a landing door switch is provided, the upper car coil being an exciting coil provided in an opening and closing device of an upper car power supply that drives the upper car, the plurality of landing door switches being provided in correspondence with the landings, and becoming an on state when the landing door is in a closed state, and becoming an off state when the landing door is in an open state; an upper car auxiliary circuit having one end connected to the upper car coil or the power supply, and a second connection portion provided in the lower car and electrically connected to the first connection portion when the lower car and the landing face each other, the upper car auxiliary circuit bypassing the landing door switches of the floors below the floor on which the lower car is located when the first connection portion and the second connection portion are electrically connected; a lower car safety circuit having a lower car main circuit connecting a lower car coil and the power supply, and a third connection portion branching from the lower car main circuit in correspondence with a landing in which a landing door switch is provided, the lower car coil being an exciting coil provided in an opening and closing device of a lower car power supply that drives the lower car, the plurality of landing door switches being provided in correspondence with the landings and connected in series between the lower car coil and the power supply; and a lower car auxiliary circuit having one end connected to the lower car coil or the power supply, and a fourth connection portion provided in the upper car and electrically connected to the third connection portion when the upper car and the landing face each other, the lower car auxiliary circuit bypassing the landing door switches of the floors above the floor on which the upper car is located when the third connection portion and the fourth connection portion are connected.

[0013] Effects of the invention

[0014] According to the present disclosure, it is possible to provide a landing door switch circuit of a double-car elevator in which a car cannot travel in a case where a door of a landing is opened, in which, even in a case where a door of a landing of a floor to which a car of one side is unable to move due to the presence of the car of the other side is opened, the car of the other side is able to travel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of an elevator device provided with the landing door switch circuit in Embodiment 1.

[0016] Figure 2 is a circuit configuration diagram of the elevator device in Embodiment 1.

[0017] Figure 3 is a circuit configuration diagram of the landing door switch circuit in Embodiment 1.

[0018] Figure 4 is a schematic diagram of an elevator device provided with the landing door switch circuit in Embodiment 2.

[0019] Figure 5 is a circuit configuration diagram of the landing door switch circuit in Embodiment 2.

[0020] Figure 6 is a partial enlarged view of the circuit configuration of the landing door switch circuit in Embodiment 2.

[0021] Figure 7 is a circuit configuration diagram of the landing door switch circuit in Embodiment 3. DETAILED DESCRIPTION

[0022] Embodiment 1.

[0023] Hereinafter, an elevator device provided with the landing door switch circuit in Embodiment 1 will be described based on the drawings.

[0024] First, the structure of the landing door switch circuit and the elevator device will be described using Figures 1 to 3 Figure 1 is a schematic diagram of an elevator device provided with the landing door switch circuit in Embodiment 1. In the following description, an elevator device provided in a building having eight floors of 1 floor (1F) to 8 floor (8F) will be described as an example. Figure 1

[0025] ​​The elevator device of the present embodiment is a single-shaft double-car elevator having an upper car 14 and a lower car 18 in one shaft 11. Further, the elevator device has a plurality of landing doors for shuttling between the upper car 14 or the lower car 18 and a landing set in accordance with each floor of a plurality of floors. Moreover, a landing door switch circuit is provided, which is configured to make the upper car 14 and the lower car 18 unable to travel in a case where the landing door is in an open door state.

[0026] The landing door switch circuit has an upper car safety circuit 20 and an upper car auxiliary circuit 30 as circuits for the upper car 14, and a lower car safety circuit 40 and a lower car auxiliary circuit 50 as circuits for the lower car 18.

[0027] The upper car safety circuit 20 has an upper car main circuit 20a and a plurality of first connection portions 22b to 22g. One end of the upper car main circuit 20a is connected to a power supply 60, and the other end is connected to an excitation coil 23b and an excitation coil 24b not shown in the figure in the upper car. Figure 1 The excitation coil 23b and the excitation coil 24b are excitation coils provided in an open-close device of an upper car traction machine drive power supply that is an upper car power supply, and are upper car coils. The excitation coil 23b is an excitation coil of a main contact 23a of an open-close device provided between a three-phase alternating current power supply 61 for operation of the elevator device and an upper car traction machine motor 75, which will be described later in detail. Further, the excitation coil 24b is an excitation coil of a main contact 24a of an open-close device provided between the three-phase alternating current power supply 61 and an upper car traction machine brake coil 77. The open-close device having the main contact 23a and the open-close device having the main contact 24a are open-close devices of the upper car traction machine drive power supply that drives the upper car 14.

[0028] Further, in the upper car main circuit 20a, the upper car landing door switches 21b of 2 floors, the upper car landing door switches 21c of 3 floors, the upper car landing door switches 21d of 4 floors, the upper car landing door switches 21e of 5 floors, the upper car landing door switches 21f of 6 floors, the upper car landing door switches 21g of 7 floors, and the upper car landing door switches 21h of 8 floors are connected in series in this order from near to far from the power supply 60. In the following description, unless particularly distinguished, only the upper car landing door switches 21 are referred to. The upper car landing door switches 21 are provided in correspondence with the landings, and the respective reference numerals from b to h correspond to the floors of the landings from the 2nd floor to the 8th floor.

[0029] The upper car landing door switch 21 is a switch that is in the ON state when the landing door is closed and in the OFF state when the landing door is open. In this embodiment, a normally closed contact with a forced release contact is used.

[0030] The first connecting part 22 branches off from the main circuit 20a for the upper car, corresponding to the landing where the upper car landing door switch 21 is provided. In this embodiment, it is a receiving device for a non-contact power supply device.

[0031] The first connecting section 22 branches off from the main circuit 20a for the upper car at a position farther away from the power supply 60 than the upper car landing door switches 21 provided on each floor. In this embodiment, first connecting sections 22b for the 2nd floor, 22c for the 3rd floor, 22d for the 4th floor, 22e for the 5th floor, 22f for the 6th floor, and 22g for the 7th floor are provided. The designations from b to g correspond to the floors of the same stations as the upper car landing door switches 21 from the 2nd to the 7th floors. Unless otherwise specified in the following description, they are simply referred to as the first connecting section 22.

[0032] One end of the upper car auxiliary circuit 30 is connected to the power supply 60, and the other end has a second connection part 31. The second connection part 31 is a transmitting device for the non-contact power supply device provided in the lower car 18. When the lower car 18 is opposite to the landing, the first connection part 22 is electrically connected to the second connection part 31. Moreover, when the first connection part 22 and the second connection part 31 are connected, the upper car auxiliary circuit 30 bypasses the upper car landing door switch 21 of the upper car safety circuit 20 for floors below the floor where the lower car 18 is located.

[0033] For example, such as Figure 1 As shown, when the lower car 18 is stopped at the 4th floor, the first connecting part 22d is electrically connected to the second connecting part 31. Therefore, the upper car landing door switches 21 below the 4th floor where the lower car 18 is located, namely the upper car landing door switches 21d, 21c, and 21b, are bypassed through the upper car auxiliary circuit 30.

[0034] Therefore, even if the landing doors of the lower car 18, which is stopped at the 4th floor, and the floors below the 4th floor (the 2nd and 3rd floors), are opened, thus disengaging the landing door switch 21 for the upper car, power can still be supplied from the power supply 60 to the excitation coils 23b and 24b via the auxiliary circuit 30 for the upper car. Therefore, even under such conditions, the upper car 14 can still move.

[0035] Next, the lower-car safety circuit 40 and the lower-car auxiliary circuit 50 will be described. The lower-car safety circuit 40 and the lower-car auxiliary circuit 50 have the same structure as the upper-car safety circuit 20 and the upper-car auxiliary circuit 30.

[0036] The lower-car safety circuit 40 includes a lower-car main circuit 40a and a plurality of third connection portions 42b to 42g. One end of the lower-car main circuit 40a is connected to the power supply 60, and the other end is connected to the field coil 43b and the field coil 44b, which are not shown in FIG. 2. The field coil 43b and the field coil 44b are field coils provided in contactors of a lower-car traction motor drive power supply, which is a lower-car power supply, and are lower-car coils. The field coil 43b is a field coil of a main contact 43a of a contactor provided between the three-phase alternating-current power supply 61 and a lower-car traction motor 85, which will be described later in detail. Further, the field coil 44b is a field coil of a main contact 44a of a contactor provided between the three-phase alternating-current power supply 61 and a lower-car traction motor brake coil 87. The contactor having the main contact 43a and the contactor having the main contact 44a are contactors of the lower-car traction motor drive power supply that drives the lower car 18. Figure 1

[0037] Further, in the lower-car main circuit 40a, the lower-car landing door switches 41g to 41a of the 7th floor to the 1st floor are connected in series in this order from the power supply 60. In the following description, the lower-car landing door switches 41 are not distinguished particularly, and are referred to simply as the lower-car landing door switches 41. The lower-car landing door switches 41 are provided corresponding to the landings, and the labels a to g correspond to the landings of the 1st floor to the 7th floor, respectively.

[0038] The lower-car landing door switches 41 are switches that become the on state when the landing door is in the closed state and become the off state when the landing door is in the open state, like the upper-car landing door switches 21. In the present embodiment, a normally closed contact with a forced release contact is used.

[0039] The third connection portions 42 branch from the lower-car main circuit 40a corresponding to the landings in which the lower-car landing door switches 41 are provided, and in the present embodiment, are the receiving devices of the non-contact power feeding device.

[0040] ​The third connection portion 42 branches from the lower-car main circuit 40a at a position away from the power supply compared to the lower-car landing door switch 41 provided in the lower portion of each landing. In the present embodiment, a third connection portion 42b of the 2nd floor, a third connection portion 42c of the 3rd floor, a third connection portion 42d of the 4th floor, a third connection portion 42e of the 5th floor, a third connection portion 42f of the 6th floor, and a third connection portion 42g of the 7th floor are provided. Each of the numerals from b to g corresponds to the floor of the landing that is the same as the lower-car landing door switch 41 from the 2nd floor to the 7th floor. In the following description, the third connection portion 42 is referred to simply as the third connection portion 42 without particular distinction.

[0041] One end of the lower-car auxiliary circuit 50 is connected to the power supply 60, and the other end has a fourth connection portion 51. The fourth connection portion 51 is a transmitting device of the non-contact power supply device provided in the upper car 14. In the case where the upper car 14 is opposite to the landing, the third connection portion 42 is electrically connected to the fourth connection portion 51. Also, in the case where the third connection portion 42 is connected to the fourth connection portion 51, the lower-car auxiliary circuit 50 bypasses the lower-car landing door switch 41 of the floor and the floors above the floor on which the upper car 14 is located of the lower-car safety circuit 40.

[0042] Next, the use of the elevator device of the present embodiment will be described. Figure 2 The circuit structure of the entire elevator device of the present embodiment will be described. Figure 2 is a circuit structure diagram of the elevator device.

[0043] The three-phase alternating-current power supply 61 is connected to the upper-car alternating-current reactor 73, the lower-car alternating-current reactor 83, the upper-car traction machine brake power supply circuit 63, and the lower-car traction machine brake power supply circuit 64 via the power circuit breaker 62. The three-phase alternating-current power supply 61 is an upper-car traction machine drive power supply that drives the upper car 14, and is also a lower-car traction machine drive power supply that drives the lower car 18.

[0044] The upper-car alternating-current reactor 73 is connected to the upper-car power converter 74 via the main contact 23a of the contactor. The upper-car power converter 74 is connected to the upper-car traction machine motor 75 of the upper-car traction machine 76. The upper-car traction machine 76 has the rope on which the upper car 14 and the counterweight 79 are mounted wound therearound, and is braked by two upper-car traction machine brakes 77c, 77d. In addition, the rope is also wound around the diverting pulley 78.

[0045] The lower-car AC reactor 83 is connected to the lower-car power converter 84 via the main contact 43a of the switch. The lower-car power converter 84 is connected to the lower-car traction motor 85 of the lower-car traction machine 86. The rope on which the lower car 18 and the counterweight 89 are mounted is wound around the lower-car traction machine 86, and braking is performed by two lower-car traction machine brakes 87c, 87d. In addition, the rope is also wound around the diverting pulley 88.

[0046] The upper-car traction machine brake power supply circuit 63 is connected to the two upper-car traction machine brake coils 77a, 77b via the main contact 24a of the switch. The upper-car traction machine brake coil 77a and the upper-car traction machine brake coil 77b are coils provided to the upper-car traction machine brake 77c and the upper-car traction machine brake 77d, respectively. In addition, the lower-car traction machine brake power supply circuit 64 is connected to the two lower-car traction machine brake coils 87a, 87b via the main contact 44a of the switch. The lower-car traction machine brake coil 87a and the lower-car traction machine brake coil 87b are coils provided to the lower-car traction machine brake 87c and the lower-car traction machine brake 87d, respectively.

[0047] Next, the use of the Figure 3 The circuit structure of the hall door switch circuit of the present embodiment will be described. Figure 3 is a circuit structure diagram of the hall door switch circuit. Figure 3 With Figure 1 Similarly, the circuit when the upper car 14 is stopped at the 7th floor and the lower car 18 is stopped at the 4th floor is shown.

[0048] As described using Figure 1 The power supply 60 is connected to the upper-car main circuit 20a, the upper-car auxiliary circuit 30, the lower-car main circuit 40a, and the lower-car auxiliary circuit 50.

[0049] The upper-car main circuit 20a is connected to the field coil 23b and the field coil 24b, and the upper-car hall door switch 21 is connected in series between the upper-car main circuit 20a and the power supply 60. In addition, a plurality of safety switches 26 are connected in addition to the upper-car hall door switch 21. The safety switch 26 is, for example, a switch that becomes an on state when the door of the car is in a closed state and becomes an off state when the door of the car is in an open state.

[0050] The lower-car main circuit 40a is connected to the field coil 43b and the field coil 44b, and the lower-car hall door switch 41 is connected in series between the lower-car main circuit 40a and the power supply 60. In addition, a plurality of safety switches 46 are connected in addition to the lower-car hall door switch 41, similarly to the upper-car main circuit 20a.

[0051] In the shutoff provided with the field coil 23b and the field coil 24b, the upper-car control circuit 25 is connected. In the shutoff provided with the field coil 43b and the field coil 44b, the lower-car control circuit 45 is connected.

[0052] The second connection portion 31 of the upper-car auxiliary circuit 30, which is not shown, is electrically connected to the first connection portion 22d, which is also not shown, branched at a position away from the power supply 60 compared to the upper-car landing door switch 21. Also, the fourth connection portion 51 of the lower-car auxiliary circuit 50, which is not shown, is electrically connected to the third connection portion 42g, which is also not shown, branched at a position away from the power supply 60 compared to the lower-car landing door switch 41g.

[0053] Next, the operation of the present embodiment will be described.

[0054] In the case where the upper car 14 is caused to travel, the upper-car control circuit 25 outputs a command to set the main contact 23a and the main contact 24a to the on state. At this time, in the case where the field coil 23b and the field coil 24b are not supplied with the electric power from the power supply 60, the main contact 23a and the main contact 24a cannot become the on state.

[0055] When the upper-car landing door switch 21 and the safety switch 26 provided in the upper-car main circuit 20a are all in the on state, the field coil 23b and the field coil 24b are supplied with the electric power from the power supply 60. On the other hand, when even one of the series-connected upper-car landing door switch 21 and the safety switch 26 is in the off state, the upper-car main circuit 20a cannot supply the field coil 23b and the field coil 24b with the electric power from the power supply 60.

[0056] Here, when the second connection portion 31 of the upper-car auxiliary circuit 30 is connected to the first connection portion 22 branched from the upper-car main circuit 20a, the electric power of the power supply 60 is supplied from the second connection portion 31 to the first connection portion 22. Therefore, the upper-car landing door switch 21 of the floor below the floor where the lower car 18 stops, that is, between the first connection portion 22 connected to the second connection portion 31 and the power supply 60, is bypassed by the upper-car auxiliary circuit 30. Therefore, even if the upper-car landing door switch 21 bypassed by the upper-car auxiliary circuit 30 becomes the off state, the field coil 23b and the field coil 24b are supplied with the electric power from the power supply 60.

[0057] The same applies to the lower car 18.

[0058] In the case where the lower car 18 is caused to travel, the lower car control circuit 45 outputs a command to set the main contact 43a and the main contact 44a to the on state. At this time, in the case where the exciting coil 43b and the exciting coil 44b are not supplied with the electric power from the power supply 60, the main contact 43a and the main contact 44a cannot become the on state.

[0059] In the case where the lower car control circuit 45 outputs the command to set the main contact 43a and the main contact 44a to the on state, the exciting coil 43b and the exciting coil 44b are supplied with the electric power from the power supply 60. On the other hand, in the case where even one of the series-connected lower car landing door switch 41 and the safety switch 46 is in the off state, the lower car main circuit 40a cannot supply the exciting coil 43b and the exciting coil 44b with the electric power from the power supply 60.

[0060] Here, in the case where the fourth connection portion 51 of the lower car auxiliary circuit 50 is connected to the third connection portion 42 branched from the lower car main circuit 40a, the electric power of the power supply 60 is supplied from the fourth connection portion 51 to the third connection portion 42. Therefore, the lower car landing door switch 41 of the floor above the floor where the upper car 14 stops is bypassed by the lower car auxiliary circuit 50 between the third connection portion 42 connected to the fourth connection portion 51 and the power supply 60. Therefore, even in the case where the lower car landing door switch 41 bypassed by the lower car auxiliary circuit 50 is in the off state, the exciting coil 43b and the exciting coil 44b are supplied with the electric power from the power supply 60.

[0061] According to the present embodiment, the following landing door switch circuit of a double-car elevator in which the car cannot travel in the case where the door of the landing is opened can be provided. Even in the case where the door of the landing of the floor to which the other car cannot move due to the presence of one car is opened, the other car can travel.

[0062] More specifically, in the present embodiment, by providing the fourth connection portion 51 of the lower car auxiliary circuit 50 and the second connection portion 31 of the upper car auxiliary circuit 30 in the upper car 14 and the lower car 18, respectively, the lower car landing door switch 41 and the upper car landing door switch 21 can be bypassed by one circuit, respectively.

[0063] Therefore, even in a case where the door of the landing of the floor to which the car of the other party cannot move due to the presence of the car of the one party at the floor is opened by a skilled person or the like, the car of the other party can travel. Regarding such a risk of the worker falling into the hoistway by mistake due to the opening of the door of the floor to which the car of the other party cannot move in configuration, it is the same as a case where the door of the landing of the floor to which the car does not stop is opened when the car stops in a normal elevator in which only a single car is present in the hoistway. Therefore, in such a case, it is not necessarily required to stop the operation of the car of the other party.

[0064] Further, according to the present embodiment, the lower-car landing door switch 41 and the upper-car landing door switch 21 that are bypassed are determined in accordance with the positions of the upper car 14 and the lower car 18. Therefore, it is not necessary to separately take in the information of the landing door switches of each floor to the control device provided with a control circuit in order to determine the landing door switches to be bypassed. Further, it is not necessary for the control device to determine the landing door switches to be bypassed based on the positions of the cars and output a command to bypass the determined landing door switches. Therefore, it is not necessary for the receiving circuit for taking in the information of the landing door switches, the operation required for determination, and the output circuit required for outputting the command. Therefore, the landing door switch circuit of the present embodiment is particularly useful in an elevator device provided in a high-rise building having many floors. This is because, in the case of a high-rise building, a large amount of wiring is required in a case where a command to bypass the landing door switches provided at each floor is output.

[0065] Further, in the present embodiment, the upper-car landing door switch 21 and the lower-car landing door switch 41 are not provided at the 1st floor of the upper-car main circuit 20a and the 8th floor of the lower-car main circuit 40a. This is because, since the upper car 14 cannot move to the 1st floor and the lower car 18 cannot move to the 8th floor, it is sometimes not dangerous even if the door of the landing is opened.

[0066] Embodiment 2.

[0067] The present embodiment is a landing door switch circuit that makes the upper car 14 and the lower car 18 unable to travel except in a case where the lower car 18 stops at the 1st floor in a case where the door of the landing at the 1st floor, which is the lowest floor, is in an open door state. Hereinafter, the differences from Embodiment 1 will be described. First, the configuration of the present embodiment will be described with reference to FIG. 8. Figures 4 to 6 The configuration of the present embodiment will be described. Figure 4 FIG. 8 is a schematic diagram of an elevator device provided with the circuit of the landing door switch of the present embodiment.

[0068] The hall door switch circuit of the present embodiment has a lowermost layer safety circuit 90 in addition to the upper car safety circuit 20. In the present embodiment, as in Embodiment 1, the upper car safety circuit 20 does not have the upper car hall door switch 21 and the first connection portion 22 in the 1st floor which is the lowermost layer. The lowermost layer safety circuit 90 is a circuit having the lowermost layer main circuit 90a and the fifth connection portion 92 to which the upper car hall door switch 91 is connected in series in the 1st floor which is the lowermost layer.

[0069] Figure 5 is a circuit configuration diagram of the hall door switch circuit of the present embodiment. Figure 6 is a partial enlarged view of the portion enclosed by the broken line of Figure 5

[0070] The lowermost layer safety circuit 90 has the lowermost layer main circuit 90a and the fifth connection portion 92. The lowermost layer main circuit 90a connects the power supply 60 and the energizing coils of the relay contacts 93a and 94a, i.e., the energizing coils 93b and 94b, to be described later, and has the upper car hall door switch 91 corresponding to the lowermost layer hall door connected in series therebetween.

[0071] The fifth connection portion 92 branches from the lowermost layer main circuit 90a in correspondence with the hall in the 1st floor in which the upper car hall door switch 91 is provided, and in the present embodiment, the fifth connection portion 92 is a receiving device of the non-contact power supply device. The fifth connection portion 92 branches from the lowermost layer main circuit 90a at a position farther from the power supply than the upper car hall door switch 91. Further, the fifth connection portion 92 is electrically connected to the second connection portion 31 in the case where the lower car 18 opposes the hall in the 1st floor, as with the first connection portion 22.

[0072] The upper car main circuit 20a of the upper car safety circuit 20 further has the relay contacts 93a and 94a between the power supply 60 and the energizing coils 23b and 24b. The relay contacts 93a and 94a are each a normally open contact which becomes in an on state when the energizing coil 93b or 94b is energized.

[0073] Further, the energizing coils 93b and 94b are coils of a relay (for example, a relay with forced guide contacts in accordance with IEC 61810-3) which is mechanically configured such that the normally open contact and the normally closed contact do not become in an on state at the same time. In the present embodiment, the upper car main circuit 20a and the lower car main circuit 40a have different contacts from the relay contacts 93a and 94a connected thereto.

[0074] Figure 6 ​The operation stop circuit 95 is connected in series with a landing door switch and the like in the upper-car main circuit 20a and the lower-car main circuit 40a, and is obtained by connecting in parallel two circuits: a circuit obtained by connecting in series a normally open contact 93c corresponding to the relay contact 93a and a normally open contact 94c corresponding to the relay contact 94a; and a circuit obtained by connecting in series a normally closed contact 93d corresponding to the relay contact 93a and a normally closed contact 94d corresponding to the relay contact 94a.

[0075] The relay contact 93a and the normally open contact 93c, which are normally open contacts, and the normally closed contact 93d are mechanically configured not to become in the on state at the same time by a forced guide, not shown. Also, the relay contact 94a and the normally open contact 94c, which are normally open contacts, and the normally closed contact 94d are likewise mechanically configured not to become in the on state at the same time by a forced guide.

[0076] Next, the operation of the present embodiment will be described.

[0077] When the landing door at the 1st floor is in the closed state, in the lowermost safety circuit, the upper-car landing door switch 91 at the 1st floor becomes in the on state, and the power of the power supply 60 is supplied to the field coil 93b and the field coil 94b, and the field coil 93b and the field coil 94b are excited. By the field coil 93b and the field coil 94b being excited, the relay contact 93a and the relay contact 94a of the upper-car main circuit 20a become in the on state.

[0078] At this time, if the other upper-car landing door switch 21 and the safety switch 26 of the upper-car safety circuit 20 are in the on state or bypassed by the upper-car auxiliary circuit 30, the power of the power supply 60 is supplied to the field coil 23b and the field coil 24b. Therefore, the upper-car control circuit 25 can cause the upper car 14 to travel.

[0079] On the other hand, when the landing door at the 1st floor is in the open state and in the case where the fifth connection portion 92 and the second connection portion 31 are not connected, the power of the power supply 60 is not supplied to the field coil 93b and the field coil 94b, and the field coil 93b and the field coil 94b are not excited. Therefore, the relay contact 93a and the relay contact 94a of the upper-car main circuit 20a become in the off state. Therefore, regardless of the state of the other switches provided in the upper-car main circuit 20a, the power of the power supply 60 is not supplied to the field coil 23b and the field coil 24b. Therefore, the upper-car control circuit 25 cannot cause the upper car 14 to travel.

[0080] Further, even when the landing door of the 1st floor is in the open state, in the case where the 5th connection portion 92 is connected to the 2nd connection portion 31, that is, in the case where the lower car 18 is opposed to the landing of the 1st floor, the upper car landing door switch 91 is bypassed by the upper car auxiliary circuit 30. Therefore, the power from the power supply 60 is supplied to the field coil 93b and the field coil 94b, and the field coil 93b and the field coil 94b are excited. Therefore, similarly to the case where the landing door of the 1st floor is in the closed state, the relay contact 93a and the relay contact 94a become the ON state, and thus the upper car control circuit 25 can cause the upper car 14 to travel.

[0081] Further, in the case where a fixed failure occurs in the relay contact 93a or the relay contact 94a in the ON state, by the operation stop circuit 95, the supply of the power from the power supply 60 is cut off in the upper car main circuit 20a and the lower car auxiliary circuit 50. Therefore, the field coil 23b, the field coil 24b, the field coil 43b, and the field coil 44b are not excited, and the upper car 14 and the lower car 18 are stopped.

[0082] In the above, according to the present embodiment, in the case where the door of the landing of the 1st floor, which is the lowermost floor, is in the open state, the upper car 14 and the lower car 18 can be caused to be unable to travel, except for the case where the lower car 18 is stopped at the 1st floor.

[0083] The case where the worker opens the landing door and performs work inside the shaft 11 in the lowermost floor of the shaft 11 is considered. In such a case, even in the lowermost floor where the upper car 14 cannot exist, the counterweight 79 can come into contact with the worker. Therefore, it is advantageous to stop the travel of the upper car 14 when the landing door of the lowermost floor is in the open state, in the case where the lower car 18 is not stopped at the lowermost floor.

[0084] Embodiment 3.

[0085] The present embodiment is a landing door switch circuit that assumes that one of the cars is unable to travel even when the car is opposed to the landing while the other car is traveling. Hereinafter, the description will be made focusing on the difference from Embodiment 2. Figure 7 is a circuit configuration diagram of the landing door switch circuit of the present embodiment.

[0086] In the present embodiment, in the upper car auxiliary circuit 30, the normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c of the lower car power supply on-off device each having the main contact 43a and the main contact 44a are provided. The normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c are excited by the field coil 43b and the field coil 44b, respectively.

[0087] Further, the normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c are contacts that are switched from the on state to the off state in opposition to the main contact 43a and the main contact 44a when electric power from the power supply 60 is supplied to the field coil 43b and the field coil 44b, and in the case where a command to set the main contact 43a and the main contact 44a to the on state is output from the lower-car control circuit 45.

[0088] In the lower-car auxiliary circuit 50, a normally closed auxiliary contact 23c and a normally closed auxiliary contact 24c of an upper-car power supply on-off device that has the main contact 23a and the main contact 24a, respectively, are also provided. The normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c are excited by the field coil 23b and the field coil 24b, respectively.

[0089] Further, the normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c are contacts that are switched from the on state to the off state in opposition to the main contact 23a and the main contact 24a when electric power from the power supply 60 is supplied to the field coil 23b and the field coil 24b, and in the case where a command to set the main contact 23a and the main contact 24a to the on state is output from the upper-car control circuit 25.

[0090] Next, the operation of the present embodiment will be described.

[0091] In the case where the lower car 18 is in running, that is, in the case where the main contact 43a and the main contact 44a are in the on state, the normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c are in the off state. Therefore, the upper-car auxiliary circuit 30 cannot supply electric power from the power supply 60 from the second connection portion 31 to the first connection portion 22, and cannot bypass the upper-car landing door switch 21.

[0092] Therefore, even if the lower car 18 is in running at the time when the landing door of the floor below the floor where the lower car 18 is present becomes the open state, the upper car 14 cannot run. This is because the supply of electric power to the field coil 23b and the field coil 24b in the upper-car main circuit 20a is cut off by the upper-car landing door switch 21 of the landing door in the open state, and the supply of electric power to the field coil 23b and the field coil 24b in the upper-car auxiliary circuit 30 is cut off by the normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c.

[0093] Also, in the case where the upper car 14 is in motion, that is, in the case where the main contact 23a and the main contact 24a are in the on state, the normally closed auxiliary contact 23c and the normally closed auxiliary contact 24c are in the off state. Therefore, the lower car auxiliary circuit 50 cannot supply the power from the power supply 60 from the fourth connection 51 to the third connection 42, and cannot bypass the lower car landing door switch 41.

[0094] Therefore, even if the upper car 14 is in the instant of being in contact with the landing and the third connection 42 and the fourth connection 51 are electrically connected, when the landing door is in the open state at the floor above the floor where the upper car 14 is present while the upper car 14 is in motion, the lower car 18 cannot move. This is because the power supply to the field coil 43b and the field coil 44b in the lower car main circuit 40a is cut off by the lower car landing door switch 41 of the landing door in the open state, and the power supply to the field coil 43b and the field coil 44b in the lower car main circuit 40a is cut off by the normally closed auxiliary contact 43c and the normally closed auxiliary contact 44c.

[0095] In the above, according to the present embodiment, it is possible to assume that even if the car in motion is in contact with the landing, the other car cannot move while the car in motion.

[0096] In the above, the embodiment has been described, but the present disclosure is not limited to the embodiment, and the following shows a modification.

[0097] In the embodiment, one of the upper car auxiliary circuit 30 and the lower car auxiliary circuit 50 is connected to the power supply 60. However, in order to solve the problem, it is also possible that one is not connected to the power supply 60, but is connected to the field coil 23b and the field coil 24b, and the field coil 43b and the field coil 44b.

[0098] In this case, in the upper car main circuit 20a and the lower car main circuit 40a, the distance of the landing door switch from the power supply 60 and the distance of the first connection 22 or the third connection 42 from the power supply 60 become in the opposite order.

[0099] For example, in the case where the upper car auxiliary circuit 30 is connected to the field coil 23b and the field coil 24b, in order to bypass the upper car landing door switch 21 of the floor below the floor where the lower car 18 is present as in the embodiment, the order of the upper car landing door switch 21 and the first connection 22 in the upper car main circuit 20a must be reversed.

[0100] Specifically, in the upper-car main circuit 20a, the upper-car landing door switches 21b of the 2nd floor, 21c of the 3rd floor, 21d of the 4th floor, 21e of the 5th floor, 21f of the 6th floor, 21g of the 7th floor, and 21h of the 8th floor are connected in series in this order from the farthest to the closest to the power supply 60, i.e., from the closest to the farthest to the field coils 23b and 24b. Also, the first connection portion 22 branches from the upper-car main circuit 20a at a position closer to the power supply 60 than the upper-car landing door switches 21 provided at each floor. Further, the safety switch 26 is provided at a position closer to the power supply 60 than the upper-car landing door switch 21b of the 2nd floor.

[0101] In the embodiments, the first connection portion 22, the second connection portion 31, the third connection portion 42, the fourth connection portion 51, and the fifth connection portion 92 are the receiving device or the transmitting device of the non-contact power feeding device. However, in order to solve the problem, it is also possible to be mechanically connected.

[0102] In Embodiments 2 and 3, the operation stop circuit 95 is provided in the upper-car auxiliary circuit 30 and the lower-car auxiliary circuit 50, but it is also possible not to be provided.

[0103] Explanation of Reference Numerals

[0104] 11 shaft, 14 upper car, 18 lower car, 20 upper car safety circuit, 20a upper car main circuit, 21, 21b, 21c, 21d, 21e, 21f, 21g, 21h upper car landing door switch, 22, 22b, 22c, 22d, 22e, 22f, 22g first connection portion, 23a main contact, 23b field coil, 23c normally closed auxiliary contact, 24a main contact, 24b field coil, 24c normally closed auxiliary contact, 25 upper car control circuit, 26 safety switch, 30 upper car auxiliary circuit, 31 second connection portion, 40 lower car safety circuit, 40a lower car main circuit, 41, 41a, 41b, 41c, 41d, 41e, 41f, 41g lower car landing door switch, 42, 42b, 42c, 42d, 42e, 42f, 42g third connection portion, 43a main contact, 43b field coil, 43c normally closed auxiliary contact, 44a main contact, 44b field coil, 44c normally closed auxiliary contact, 45 lower car control circuit, 46 safety switch, 50 lower car auxiliary circuit, 51 fourth connection portion, 60 power supply, 61 three-phase alternating current power supply, 62 power circuit breaker, 63 upper car hoist machine brake power supply circuit, 64 lower car hoist machine brake power supply circuit, 73 upper car AC reactor, 74 upper car power converter, 75 upper car hoist machine motor, 76 upper car hoist machine, 77, 77a, 77b upper car hoist machine brake coil, 77c, 77d upper car hoist machine brake, 78 diverting pulley, 79 counterweight, 83 lower car AC reactor, 84 lower car power converter, 85 lower car hoist machine motor, 86 lower car hoist machine, 87, 87a, 88b lower car hoist machine brake coil, 87c, 87d lower car hoist machine brake, 88 diverting pulley, 89 counterweight, 90 lowermost safety circuit, 90a lowermost main circuit, 91 upper car landing door switch, 92 fifth connection portion, 93a relay contact, 93b field coil, 93c normally open contact, 93d normally closed contact, 94a relay contact, 94b field coil, 94c normally open contact, 94d normally closed contact, 95 operation stop circuit.

Claims

1. A landing door switch circuit applied to an elevator apparatus having an upper car and a lower car in a hoistway and having a plurality of landing doors for going and returning between the upper car or the lower car and landings set in accordance with each of a plurality of floors, wherein the landing door switch circuit comprises: an upper car safety circuit having an upper car main circuit connecting an upper car coil provided in an opening and closing device of an upper car power source that drives the upper car and a power source in series with a plurality of landing door switches provided in correspondence with the landings between the upper car coil and the power source, the plurality of landing door switches being in an on state when a landing door is in a closed state and in an off state when the landing door is in an open state, and a first connection portion branched from the upper car main circuit in correspondence with the landings in which the landing door switches are provided; an upper car auxiliary circuit having one end connected to the upper car coil or the power source and having a second connection portion provided in the lower car and electrically connected to the first connection portion when the lower car opposes the landings, the upper car auxiliary circuit bypassing the landing door switches of the landings below a floor on which the lower car is located when the first connection portion and the second connection portion are electrically connected; a lower car safety circuit having a lower car main circuit connecting a lower car coil provided in an opening and closing device of a lower car power source that drives the lower car and the power source in series with a plurality of landing door switches provided in correspondence with the landings between the lower car coil and the power source, the plurality of landing door switches being in an on state when a landing door is in a closed state and in an off state when the landing door is in an open state, and a third connection portion branched from the lower car main circuit in correspondence with the landings in which the landing door switches are provided; and a lower car auxiliary circuit having one end connected to the lower car coil or the power source and having a fourth connection portion provided in the upper car and electrically connected to the third connection portion when the upper car opposes the landings, the lower car auxiliary circuit bypassing the landing door switches of the landings above a floor on which the upper car is located when the third connection portion and the fourth connection portion are electrically connected.

2. The landing door switch circuit according to claim 1, wherein the upper car main circuit does not connect in series a landing door switch corresponding to a lowermost landing, the upper car main circuit having a relay contact between the upper car coil and the power source, ​ ​ ​ ​ ​ ​ The landing door switch circuit further has a lowermost safety circuit having a lowermost main circuit connecting an excitation coil of the relay contact, i.e., a lowermost coil, to the power supply and connecting the landing door switch corresponding to the lowermost landing in series, and a fifth connection portion branching from the lowermost main circuit corresponding to the lowermost landing, The second connection portion is electrically connectable with the fifth connection portion, The upper-car auxiliary circuit bypasses the landing door switch provided at the lowermost landing when the fifth connection portion is electrically connected with the second connection portion.

3. The landing door switch circuit according to claim 1 or 2, wherein The upper-car auxiliary circuit has a normally closed auxiliary contact of an on-off switch of the lower-car power supply, The lower-car auxiliary circuit has a normally closed auxiliary contact of an on-off switch of the upper-car power supply.

4. The landing door switch circuit according to any one of claims 1 to 3, wherein One of the first connection portion and the second connection portion is a receiving device of a non-contact power supply device, and the other is a transmitting device of a non-contact power supply device, One of the third connection portion and the fourth connection portion is a receiving device of a non-contact power supply device, and the other is a transmitting device of a non-contact power supply device.

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