JP2019167229A - Double deck elevator - Google Patents

Abstract

To provide a double-deck elevator that can suppress the shortening of the lifetime of electronic components as compared with the prior arts as a safety measure in the event of a failure on the auxiliary drive side.SOLUTION: Included are: a car interval control device 80 that controls the operation of the brake device 48 that applies a braking force to the motor 42 that drives the car interval adjusting mechanism that adjusts the car interval between the upper car and the lower car. The car interval control device 80 includes a car safety circuit 86 with door open detection switches 60 and 62 connected in series, a bypass circuit 88 including contacts 88a, 90a which are safety switches connected in parallel with the door open detection switches 60, 62, and a brake release switch 100 provided in the electric circuit between the car safety circuit 86 and the brake device 48. When the door open detection switches 60 and 62 detect a door open state, the contacts 88a and 90a of the bypass circuit 88 are turned off and the car safety circuit 86 is shut off when the brake release switch 100 is turned on.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a double deck elevator, and more particularly to a double deck elevator capable of adjusting an interval between an upper car and a lower car.

  A double deck elevator with an upper car and a lower car inside the outer car frame that moves along the hoistway is superior in transportation capacity compared to a general elevator with a single car, and is a large high-rise building. Is being introduced. A double deck elevator installed in a building with uneven floor height is provided with a car interval adjusting mechanism so that the vertical distance between the upper car and the lower car can be adjusted. This car interval adjusting mechanism generally has a configuration in which the upper car and the lower car are relatively moved in the vertical direction by a driving force of a motor or the like.

  By the way, an elevator must be provided with a device that automatically stops the car when a failure occurs in the drive device or the controller, and the car moves up and down before all the doors of the car and the hoistway are closed. (Building Standards Law Enforcement Ordinance Article 129-10, Paragraph 3, Item 1), double deck elevators are no exception. This phenomenon in which the car moves up and down before the car and the doorway of the hoistway are closed is called door open travel.

  In particular, in a double deck elevator equipped with a car interval adjusting mechanism, not only when a hoisting machine motor and its controller, which are main driving devices for moving an outer car frame, malfunction, but also an upper car and a lower car. Even when the motor for the car interval adjusting mechanism, which is a sub-drive device for relatively moving the car, and its controller break down, the upper car and the lower car may move up and down.

  Therefore, as a safety measure in the event of a failure on the side of the auxiliary drive device, there has been proposed a measure for prohibiting the operation of the car interval adjustment mechanism when the upper car door or the lower car door is open. For example, in Patent Document 1, an electromagnetic contactor is provided in an electric path between a control unit that controls a motor that drives a car interval adjusting mechanism and a power source, and when the door open state is detected, the electric path is A configuration for blocking is disclosed.

Japanese Patent Laying-Open No. 2015-048215

  However, in the above configuration, every time the upper car door or the lower car door opens and closes, the electric circuit between the control unit and the power source is cut off, so that the contact of the electromagnetic contactor frequently operates. As a result, the life of the magnetic contactor and other electronic components may be shortened, and the frequency of component replacement and maintenance may increase.

  In view of the above-described problems, an object of the present invention is to provide a double deck elevator that can suppress the shortening of the lifetime of electronic components as compared with the conventional safety measures when a failure occurs on the side of the auxiliary drive device.

  In order to achieve the above object, a double-deck elevator according to the present invention is a double-deck elevator in which an upper car and a lower car are provided at intervals in the vertical direction inside an outer car frame that moves in a hoistway. A car interval adjustment mechanism that adjusts the cage interval so that a cage interval between the upper cage and the lower cage is changed from a first interval to a second interval by a driving force of the motor and the motor; A brake device that applies a braking force to a motor and maintains the cage interval at the second interval; and a cage interval control device that controls driving of the motor and operation of the brake device, and the cage interval The control device includes a car safety circuit in which a plurality of door open detection switches for detecting a door open state in which the doors of the upper car and the lower car are open, respectively, and the door open detection switch A bypass circuit including a safety switch connected in parallel; and a brake release switch provided in an electric circuit between the car safety circuit and the brake device, wherein the door open detection switch detects the door open state. When the brake release switch is turned on, the safety switch of the bypass circuit is turned off, and the car safety circuit is shut off.

  In addition, the car interval control device includes an electromagnetic relay having an a contact and a b contact provided in an electric circuit between the brake release switch and the safety switch, and the safety switch is used to operate the brake release switch. It is interlocked via the electromagnetic relay and is switched to an on / off state opposite to the brake release switch.

  Further, the car interval control device is installed in the outer car frame.

  According to the double deck elevator according to the present invention, the car interval control device is configured to shut off the car safety circuit by turning off the safety switch of the bypass circuit when the brake release switch is turned on. Therefore, it is not necessary to cut off the power supply to the motor every time the upper car door or the lower car door is opened and closed. As a result, the frequency at which the electric power supply to the motor is cut off in the car interval control device, and thus the frequency at which the electronic component used for the cut off is reduced, and as a result, the shortening of the life of the electronic component can be suppressed.

It is a schematic structure figure of a double deck elevator concerning an embodiment. It is a block diagram which shows the structure of the control apparatus of the said double deck elevator. It is a circuit block diagram of a car space | interval control apparatus.

  Hereinafter, embodiments of a double deck elevator according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the double deck elevator 10 which concerns on embodiment is a traction type elevator which has the machine room 14 in the uppermost part of the hoistway 12, and is installed in the building where the floor height is uneven. In the machine room 14, a hoisting machine 16 is installed. The hoisting machine 16 has a drive sheave 20 that is rotationally driven by a hoisting machine motor 18 that is a main driving device. A driven sheave 22 is provided adjacent to the drive sheave 20.

  A main rope 24 is hung on the drive sheave 20 and the driven sheave 22. A lifting body 26 is suspended from the first end 24A of the main rope 24, and a counterweight 28 is suspended from the second end 24B opposite to the first end 24A. When the drive sheave 20 of the hoisting machine 16 is rotationally driven by the driving force of the hoisting machine motor 18, the elevating body 26 moves up and down the hoistway 12 opposite to the counterweight 28.

  The elevating body 26 includes an outer car frame 30 having a rectangular shape that is long in the vertical direction (vertical direction). The outer car frame 30 includes an upper beam 32, a lower beam 34, and a pair of upright frames 36A and 36B that connect the upper beam 32 and the lower beam 34. Each of the upper beam 32, the lower beam 34, and the pair of upright frames 36A and 36B is made of a steel material, and each connecting portion is firmly fixed by a fastener such as a bolt and a nut or fillet welding. .

  Inside the outer car frame 30 described above, two cars 38A and 38B are provided at intervals in the vertical direction. Hereinafter, of the two cars 38A and 38B, the upper car is referred to as an upper car 38A, and the lower car is referred to as a lower car 38B.

  A car spacing adjustment hoist 40 is installed on the upper beam 32 of the outer car frame 30. The car spacing adjustment hoisting machine 40 has a sheave 44 that is rotationally driven by a motor 42 (FIG. 2) as a sub-driving device, like the hoisting machine 16 described above. A rope 46 for adjusting a car interval is hung on the sheave 44. An upper car 38A is connected to one end of the rope 46, and a lower car 38B is connected to the other end.

  When the sheave 44 of the car spacing adjustment hoist 40 is driven to rotate in the first direction from the front side to the back side in FIG. 1 by the driving force of the motor 42 (FIG. 2), the upper car 38A and The lower car 38B moves toward each other, and the car interval D between the upper car 38A and the lower car 38B is reduced. On the other hand, when the sheave 44 is rotationally driven in the second direction opposite to the first direction, the upper car 38A and the lower car 38B move in directions away from each other, and between the upper car 38A and the lower car 38B. The car spacing D increases. In this way, the car interval adjusting hoist 40, the sheave 44, and the rope 46 are driven by the driving force of the motor 42 so that the car interval D is changed from the first interval before adjustment to the second interval after adjustment. It functions as a car spacing adjustment mechanism.

  When the car distance D between the upper car 38A and the lower car 38B becomes the second distance, the car distance D is held at the second distance by the braking force of the brake device 48 (FIG. 2). Although not shown in FIG. 1, the brake device 48 is a known non-excitation operation type electromagnetic brake, and when the excitation coil is energized, the armature is attracted to the field and the brake is released. When the energization of the exciting coil is interrupted, the armature is pressed against the brake disc by a coil spring, and a braking force is applied.

  The double deck elevator 10 is provided with an upper car detection means 50 for detecting the position of the upper car 38A in the vertical direction within the hoistway 14. The upper car detection means 50 includes a photo sensor 50A fixed to the upper car 38A and a light shielding plate 50B fixed to the side wall of the hoistway 14. The photosensor 50A is a transmissive photosensor in which a light projector and a light receiver (not shown) are arranged to face each other, and detects a light shielding plate 50B that enters a facing region between the light projector and the light receiver. The light shielding plate 50B is fixed at a position where the upper car 38A is detected when the upper car 38A is landed on the destination floor. The upper car detecting means 50 detects that the upper car 38A is at the landing position of the destination floor. The detection signal of the upper car detection means 50 is used as a trigger signal for the door opening command and also used as a position shift detection signal for the upper car 38A.

  Similarly to the upper car 38A, the lower car 38B is provided with a lower car detecting means 52 for detecting the position of the lower car 38B in the vertical direction within the hoistway 14. Since the lower car detection means 52 has the same basic configuration and role as the upper car detection means 50 except that the detection target and the installation position are different, detailed description thereof is omitted here.

  In the present embodiment, the outer car frame 30 is also provided with a car frame detecting means 54 having the same configuration as each of the upper car detecting means 50 and the lower car detecting means 52. The car frame detection means 54 detects that the outer car frame 30 is at a position to be stopped when the upper car 38A and the lower car 38B land on the respective destination floors.

  Each of the car doors 56A and 56B at the entrance / exit of the upper car 38A and the car doors 58A and 58B at the entrance / exit of the lower car 38B are opened / closed on condition that the upper car 38A and the lower car 38B are at the landing positions of the respective destination floors. It becomes possible.

  The car doors 56A and 56B of the upper car 38A are opened to the left and right, and are opened and closed by a car door driving device (not shown). At the doorway of the upper car 38A, an upper car door open detection switch 60 (FIG. 2) is provided for detecting a state in which the car doors 56A and 56B are opened (door open state). Similarly to the car doors 56A and 56B of the upper car 38A, the car doors 58A and 58B of the lower car 38B are both left and right open, and are opened and closed by a car door driving device (not shown) separate from the upper car 38A side. . A lower car door opening detection switch 62 (FIG. 2) for detecting a state where the car doors 58A and 58B are opened (door open state) is also provided at the entrance / exit of the lower car 38B. As these upper car door opening detection switch 60 and lower car door opening detection switch 62, for example, limit switches with a forced opening mechanism are used.

  Moreover, although illustration is abbreviate | omitted, the landing door open detection switch 64A, ... 64B (FIG. 3) is provided also in the landing door provided in the landing of each floor of a building. Similarly to the car doors 56A, 56B, 58A, 58B, limit switches with a forced opening mechanism are used for the landing door open detection switches 64A,. Note that an interlock mechanism is employed on the landing door side, which is unlocked by opening the car doors 56A, 56B, 58A, 58B.

  Each of the upper car door open detection switch 60, the lower car door open detection switch 62, and the landing door open detection switches 64A,... 64B is turned off in the door open state, and the car doors 56A, 56B, 58A, 58B and the landing doors. Is turned on when each of them is in a closed state (door closed state).

  General operation control of the double deck elevator 10 having the above-described configuration is performed by a main controller 70 installed in the machine room 14 and a car interval controller 80 installed on the upper beam 32 of the outer car frame 30. The main controller 70 and the car interval controller 80 are electrically connected by a cable (not shown).

  As shown in FIG. 2, the main controller 70 is a computer having a basic configuration such as a CPU 72 and a memory 74. In the memory 74, for example, in addition to the drive control of the hoisting machine motor 18, the car interval control device 80 such as the opening / closing control of the car doors 56A, 56B, 58A, 58B at the entrances of the upper car 38A and the lower car 38B. Various control programs for executing operation control performed in cooperation are stored. In addition to the basic control circuit, the main control device 70 further incorporates a safety circuit 76 for preventing the door from running.

  The car interval control device 80 is also a computer having a basic configuration such as a CPU 82 and a memory 84. In the memory 84, in addition to drive control of the motor 42 and operation control of the brake device 48, the car doors 56A and 56B. , 58A, 58B and the like, and various control programs for executing operation control performed in cooperation with the main controller 70 are stored.

  A car safety circuit 86 is also incorporated in the car interval control device 80. The car safety circuit 86 is a part of a series circuit connected to various sensors and switches for monitoring the safe operation of the double deck elevator 10, and when any abnormality is detected by these sensors or switches, the car safety circuit 86 is driven. It is configured to cut off power to the magnetic contactor that leads to the source.

  Next, the main circuit configuration of the car interval control device 80 will be described with reference to FIG.

  As shown in FIG. 3, the car interval control device 80 includes a car safety circuit 86. In the car safety circuit 86, an upper car door opening detection switch 60 and a lower car door opening detection switch 62 are connected in series, and each of the landing door opening detection switches 64A,. A detection switch 60 and a lower car door opening detection switch 62 are respectively connected in series. Hereinafter, this series circuit portion is referred to as a “door open detection circuit”.

  A bypass circuit 88 is provided to bypass the door open detection circuit. The bypass circuit 88 includes a contact 88a of the first electromagnetic contactor BP1 and a contact 90a of the second electromagnetic contactor BP2, which are safety switches. The contact 88a and the contact 90a are both a contacts, and the contact 88a and the contact 90a are connected in series. Therefore, the contact 88a and the contact 90a, and the upper car door opening detection switch 60 and the lower car door opening detection switch 62 are connected in parallel.

  The car interval control device 80 also includes an inverter 92 that drives and controls the motor 42. A relay switch 94 and an electromagnetic coil 96b are provided on the electric path between the inverter 92 and the door open detection circuit. The relay switch 94 is controlled to be turned on and off by the CPU 82. The electromagnetic coil 96b is a coil of an electromagnetic contactor IV provided for connection to the inverter 92. When the relay switch 94 is turned on, the electromagnetic coil 96b is energized. Then, the electromagnetic coil 96b is excited, the contact 96a of the electromagnetic contactor IV is activated, and the electric path between the inverter 92 and the motor 42 is conducted. In addition, a breaker switch 98 is provided in the electric path between the relay switch 94 and the door open detection circuit.

  A brake release switch 100 and an electromagnetic coil 102 b are provided via a breaker switch 98 in the electrical path between the door open detection circuit and the brake device 48. The brake release switch 100 is a relay contact corresponding to an electromagnetic coil 104b of an electromagnetic relay ER, which will be described later, and ON / OFF switching is controlled by the CPU 82. The electromagnetic coil 102b is a coil of an electromagnetic contactor BK provided for operating the brake device 48. When the brake release switch 100 is turned on, the electromagnetic coil 102b is energized. Then, the electromagnetic coil 102b is excited, the contact 102a of the electromagnetic contactor BK is operated, and the brake device 48 is opened.

  The car interval control device 80 further includes an electromagnetic coil 104b of an electromagnetic relay ER that is excited in response to a brake release command from the CPU 82. The brake release switch 100 is operated by the magnetic force generated by exciting the electromagnetic coil 104b.

  The electromagnetic relay ER has two electromagnetic coils 106 b and 108 b in addition to the electromagnetic coil 104 b for on / off control of the brake release switch 100. Each of the electromagnetic coils 106b and 108b is connected in parallel with the electromagnetic coil 104b and excited in synchronization with the electromagnetic coil 104b. That is, each of the electromagnetic coils 106b and 108b is configured to be excited by a brake release command from the CPU 82.

  The electromagnetic relay ER also has contacts 106a and 108a corresponding to the electromagnetic coils 106b and 108b, respectively. These contacts 106a and 108a are both b contacts that are turned off when the electromagnetic coils 106b and 108b are excited and are turned on when the electromagnetic coils 106b and 108b are not excited. The contact 106a and the contact 108a are connected in parallel. An electromagnetic coil 88b for operating the contact 88a of the first electromagnetic contactor BP1 provided in the bypass circuit 88 is connected in series with the contact 106b of the electromagnetic relay ER, and the second electromagnetic contactor BP2 is connected. An electromagnetic coil 90b for operating the contact 90a is connected in series with the contact 108a of the electromagnetic relay ER.

  The car interval control device 80 having the above-described circuit configuration has a b-contact on the electric path between the brake release switch 100 and the contact 88a of the first electromagnetic contactor BP1, which is a safety switch, and the contact 90a of the second electromagnetic contactor BP2. The contacts 88a and 90a are linked to the operation of the brake release switch 100 via the electromagnetic relay ER, and are switched to an on / off state opposite to that of the brake release switch 100. It has a configuration like this.

  Next, the operation of the car interval control device 80 having the above-described circuit configuration will be described with reference to FIGS. First, the operation when the door is closed will be described with reference to a case where the motor 42 and the brake device 48 are controlled in order to adjust the car interval D (FIG. 1).

  In the double deck elevator 10, the car interval D is adjusted when the outer car frame 30 moves through the hoistway 12. At this time, each of the car doors 56A and 56B of the upper car 38A and the car doors 58A and 58B of the lower car 38B are in a closed state (door closed state). Of course, all landing doors are also closed. At this time, in the car interval control device 80, the upper car door open detection switch 60, the lower car door open detection switch 62, and the landing door open detection switches 64A,... 64B are all turned on. The function of the car safety circuit 86 is held by the door open detection circuit.

  Then, the CPU 82 turns on the relay switch 94 and excites the electromagnetic coil 96b to operate the contact 96a of the electromagnetic contactor IV. Thereby, the electric path between the inverter 92 and the motor 42 is conducted, and the drive control of the motor 42 by the inverter 92 becomes possible.

  The CPU 82 also outputs a brake release command signal to excite the electromagnetic coil 104b. When the electromagnetic coil 104b is excited, the brake release switch 100 is turned on. Then, the electromagnetic coil 102b is excited and the contact 102a of the electromagnetic contactor BK operates. As a result, the brake device 48 is released.

  When the upper car 38A and the lower car 38B are relatively moved by the driving force of the motor 42 and the car interval D changes from the first interval to the second interval, the CPU 82 turns off the brake release switch 100, and the brake device 48. Shut off the power supply to the. As a result, the brake device 48 is operated, and the car interval D is maintained at the second interval.

  As described above, the car interval control device 80 is configured to perform necessary drive control while holding the function of the car safety circuit 86 with the door open detection circuit when the door is closed.

  Next, the operation when the door is opened will be described with reference to the case where the upper car 38A and the lower car 38B land on the target floor and open the respective car doors 56A, 56B, 58A, 58B.

  As described above, it is assumed that the adjustment of the car interval D is completed during the movement of the outer car frame 30, and the upper car 38A and the lower car 38B land on the respective destination floors. At this time, in the car interval control device 80, the brake release switch 100 is turned off because the brake device 48 is operated in order to maintain the car interval D at the second interval.

  When the electromagnetic coil 104b of the electromagnetic relay ER enters a non-excited state to turn off the brake release switch 100, the two electromagnetic coils 106b and 108b connected in parallel with the electromagnetic coil 104b are also synchronized with the electromagnetic coil 104b. De-energized state. Then, the contacts 106a and 108a of the electromagnetic relay ER as the b contact are turned on, and the electromagnetic coil 88b of the first electromagnetic contactor BP1 and the electromagnetic coil 90b of the second electromagnetic contactor BP2 are respectively excited, and as a result, the bypass circuit 88 contacts 88a and 90a are turned on.

  Here, when the car doors 56A and 56B of the upper car 38A or the car doors 58A and 58B of the lower car 38B are opened (door open state), the upper car door open detection switch 60 and the lower car door open detection switch 62 Either one is turned off and the door open detection circuit is opened. However, since the contacts 88a and 90a of the bypass circuit 88 connected in parallel with the door opening detection circuit are turned on, the function of the car safety circuit 86 is retained by the bypass circuit 88.

  Thus, the car interval control device 80 is configured such that the function of the car safety circuit 86 is held by the bypass circuit 88 when the door is in the open state.

  Next, an operation when a control runaway occurs in the car interval control device 80 on the sub-control device side and a door-opening travel occurs will be described.

  As described above, when the upper car 38A and the lower car 38B land on the respective target floors and the respective car doors 56A, 56B, 58A, 58B are opened, the brake release switch 100 is turned off. Normally, the braking force of the brake device 48 is applied, and the upper car 38A and the lower car 38B do not travel. However, if the car interval control device 80 runs out of control, the brake release switch 100 is turned on even when the door is open, and each of the upper car 38A and the lower car 38B may run. Therefore, the car interval control device 80 is configured to automatically stop the upper car 38A and the lower car 38B as follows even if such an event occurs.

  When the electromagnetic coil 104b of the electromagnetic relay ER is excited by the control runaway and the brake release switch 100 is turned on, the brake device 48 is released, and at the same time, the two electromagnetic coils 106b and 108b are also connected to the electromagnetic coil 104b. Each is in the excited state in synchronization. Then, the contacts 106a and 108a of the electromagnetic relay ER, which is the b contact, are turned off, and the electromagnetic coil 88b of the first electromagnetic contactor BP1 and the electromagnetic coil 90b of the second electromagnetic contactor BP2 are in a non-excited state. As a result, the contacts 88a and 90a of the bypass circuit 88 are turned off, and the bypass circuit 88 is opened.

  On the other hand, as described above, in the door open state, at least one of the upper car door open detection switch 60 and the lower car door open detection switch 62 is turned off, so the door open detection circuit is open.

  Then, when the bypass circuit 88 is opened, the electric circuit of the car safety circuit 86 is cut off. When the car safety circuit 86 is cut off, the power supply to the brake device 48 is automatically cut off, so that the brake device 48 operates and the traveling of the upper car 38A and the lower car 38B is stopped.

  As described above, when the car interval control device 80 is in the door open state, that is, in the door open detection circuit, at least one of the upper car door open detection switch 60 and the lower car door open detection switch 62 is turned off. When the brake release switch 100 is turned on, the contacts 106a and 108a of the electromagnetic relay ER provided in the bypass circuit 88 are turned off and the car safety circuit 86 is shut off.

  According to the car interval control device 80 having the above-described configuration, even when power supply to the inverter 92 that is a control unit that drives and controls the motor 42 is continued when the door is opened, When the brake release switch 100 is turned on, the car safety circuit 86 can be cut off, and the power supply to the inverter 92 and thus the motor 42 can be cut off. For this reason, it is provided in the electric circuit between the inverter 92 and the motor 42 every time the car doors 56A and 56B of the upper car 38A or the car doors 58A and 58B of the lower car 38B are opened and closed, as in the prior art. There is no need to bother the electromagnetic contactor IV. As a result, in the car interval control device 80, the frequency of cutting off the power supply to the motor 42, and thus the frequency of operating the electromagnetic contactor IV, which is an electronic component used for the interruption, is reduced. The life shortening of the contactor IV can be suppressed.

  Further, since the car interval control device 80 is installed on the upper beam 32 of the outer car frame 30 close to the upper car 38A, if the frequency of operating the electromagnetic contactor IV is high as in the prior art, the operation sound is generated. May cause discomfort to the passengers in the upper car 38A, but the car interval control device 80 is less frequently operated than before, and such a situation occurs. This is also advantageous in that it can be suppressed as much as possible.

  Further, conventionally, when each of the upper car 38A and the lower car 38B is moved to the next destination floor, it is necessary to restart the magnetic contactor IV each time, for example, the next destination floor is an adjacent floor. In the case of short floor operation such as this, there is a possibility that the adjustment of the car interval is not completed during the movement of the outer car frame 30, but the car interval control device 80 does not need to restart the electromagnetic contactor IV. Also in the point that the car interval adjustment can be started as early as possible, there is an advantageous effect as compared with the prior art.

  As described above, the double deck elevator according to the present invention has been described based on the embodiment. However, the present invention is not limited to the above-described form, and may be implemented in the following form, for example. .

<Modification>
(1) In the above-described embodiment, the circuit configuration is a double fault-tolerant design in which two contacts 106a and 108a of the electromagnetic relay ER are provided in the bypass circuit 88. However, there is one electromagnetic relay contact in the bypass circuit. It does not matter. Even if there is only one contact, as long as the circuit configuration is such that the car safety circuit is cut off when the brake release switch is turned on, the function to prevent the door-opening travel can be exhibited as in the above embodiment. There is no change.

  (2) In the above embodiment, the circuit configuration is such that the contact 96a of the electromagnetic contactor IV is connected to the electric circuit between the inverter 92 and the motor 42. However, the electromagnetic contact is made to the electric circuit between the inverter 92 and the power source. The circuit configuration may be such that the contact point 96a of the device IV is connected.

  (3) In the above embodiment, the car interval adjusting device 80 is installed on the upper beam 32 of the outer car frame 30 close to the upper car 38A. However, the present invention is not limited to this, for example, the outer car close to the lower car 38B. It may be installed on the lower beam 34 of the car frame 30.

  (4) In the above-described embodiment, the car doors 56A and 56B of the upper car 38A and the car doors 58A and 58B of the lower car 38B are both left and right doors of a single door on one side. It does not matter even if it is a left-right double opening of (four doors). Of course, the car door is not limited to left and right double doors, but may be a single door. In this case, the car door may be a single door or may be a plurality of two or more houses.

  (5) In the above embodiment, a traction type car interval adjustment in which the upper car 38A is connected to one end of the rope 46 hung on the sheave 44 of the car interval adjusting hoist 40 and the lower car 38B is connected to the other end, respectively. The mechanism was adopted. It does not matter as a structure to do.

  The present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Moreover, you may implement with the form which substituted any invention specific matter to the other technique within the range which the same effect | action or effect produces.

DESCRIPTION OF SYMBOLS 10 Double elevator 12 Hoistway 30 Outer car frame 38A Upper car 38B Lower car 42 Motor 40 Car spacing adjustment winding machine 44 Sheave 46 Rope 48 Brake device 60 Upper car door open detection switch 62 Lower car door open detection switch 80 Car interval Control device 86 Car safety circuit 88a Contact 90a Contact 100 Brake release switch

Claims (3)

It is a double deck elevator in which an upper car and a lower car are provided at intervals in the vertical direction inside the outer car frame that moves in the hoistway,
A motor,
A car interval adjusting mechanism that adjusts the car interval so that a car interval between the upper car and the lower car is changed from a first interval to a second interval by a driving force of the motor;
A braking device that applies a braking force to the motor and holds the cage interval at the second interval;
A car interval control device for controlling the drive of the motor and the operation of the brake device;
Have
The car interval controller is
A car safety circuit in which a plurality of door opening detection switches for detecting a door opening state in which the doors of the upper car and the lower car are opened are respectively connected in series,
A bypass circuit including a safety switch connected in parallel with the door opening detection switch;
A brake release switch provided in an electric circuit between the car safety circuit and the brake device;
Including
When the door open detection switch detects the door open state, when the brake release switch is turned on, the safety switch of the bypass circuit is turned off to shut off the car safety circuit. A double deck elevator characterized by The car interval controller is
An electromagnetic relay having an a contact and a b contact provided in an electric circuit between the brake release switch and the safety switch;
2. The double deck elevator according to claim 1, wherein the safety switch is interlocked with the operation of the brake release switch via the electromagnetic relay and is switched to an on / off state opposite to the brake release switch. The double-deck elevator according to claim 1 or 2, wherein the car interval control device is installed in the outer car frame.