JP6801683B2 - Double deck elevator - Google Patents

Description

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

A double-deck elevator with an upper car and a lower car inside the outer car frame that moves on the hoistway has better transportation capacity than a general elevator with a single car, and is a large-scale high-rise building. The introduction to is in progress. In addition, the double deck elevator installed in a building with uneven floor height is provided with a car spacing adjustment mechanism so that the spacing between the upper car and the lower car in the vertical direction can be adjusted. This car spacing adjusting mechanism is generally configured to move the upper car and the lower car relatively in the vertical direction by a driving force of a motor or the like.

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

In particular, in a double deck elevator equipped with a car spacing adjustment mechanism, not only when a failure occurs in the hoisting machine motor and its controller, which are the main drive devices for moving the outer car frame, but also in the case of a failure, the upper car and the lower car Even if the motor for the car interval adjusting mechanism, which is an auxiliary drive device for relatively moving the car, and its controller fail, 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 auxiliary drive device side, a measure has been proposed in which the car interval adjusting mechanism is prohibited from operating 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 circuit between a control unit that controls a motor for driving a car interval adjusting mechanism and a power source, and when the door open state is detected, the electric circuit is used. The configuration to block is disclosed.

JP 2015-048215

However, in the above configuration, each time the upper car door or the lower car door opens and closes, the electric circuit between the control unit and the power supply is cut off, so that the contact of the magnetic contactor operates frequently. 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 problems, it is an object of the present invention to provide a double deck elevator capable of suppressing shortening of the life of electronic components as a safety measure in the event of a failure on the auxiliary drive device side.

In order to achieve the above object, the 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 on a hoistway. , The car spacing adjusting mechanism that adjusts the car spacing so that the car spacing between the upper car and the lower car changes from the first spacing to the second spacing by the motor and the driving force of the motor. It has a brake device that applies a braking force to the motor and holds the car interval at the second interval, and a car interval control device that controls the drive of the motor and the operation of the brake device. The control device is connected in parallel with the car safety circuit in which a plurality of door open detection switches for detecting the open door open state of the upper car and the lower car are connected in series, respectively, and the door open detection switch. The door open detection switch detects the door open state, including a bypass circuit including the safety switch, and a brake release switch provided in the electric path between the car safety circuit and the brake device. At that time, when the brake release switch is turned on, the safety switch of the bypass circuit is turned off, and the car safety circuit is cut off.

Further, the car interval control device includes an electromagnetic relay having a contact and 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 characterized by interlocking via the electromagnetic relay and switching to an on / off state opposite to that of the brake release switch.

Further, the car interval control device is characterized in that it 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 each time the upper car door or the lower car door is opened and closed as in the conventional case. As a result, the frequency with which the power supply to the motor is cut off in the car interval control device, and the frequency with which the electronic component used for the cutoff is operated are reduced, and as a result, the life of the electronic component can be shortened.

It is a schematic block diagram of the double deck elevator which concerns on embodiment. It is a block diagram which shows the structure of the control device of the said double deck elevator. It is a circuit block diagram of a car interval control device.

Hereinafter, embodiments of the 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 according to the embodiment is a traction type elevator having a machine room 14 at the uppermost part of the hoistway 12, and is installed in a building having uneven floor heights. A hoisting machine 16 is installed in the machine room 14. The hoisting machine 16 has a drive sheave 20 that is rotationally driven by a hoisting machine motor 18 which 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. An elevating body 26 is suspended from the first end portion 24A of the main rope 24, and a counterweight 28 is suspended from the second end portion 24B on the side opposite to the first end portion 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 the hoistway 12 in the vertical direction 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 has a pair of vertical frames 36A and 36B that connect the upper beam 32, the lower beam 34, and the upper beam 32 and the lower beam 34. The upper beam 32, the lower beam 34, and the pair of vertical frames 36A and 36B are each made of shaped steel, and the connecting portions thereof are firmly fixed by fasteners such as bolts and nuts 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 will be referred to as an upper car 38A, and the lower car will be referred to as a lower car 38B.

A hoisting machine 40 for adjusting the car interval is installed on the upper beam 32 of the outer car frame 30. Like the hoisting machine 16 described above, the car spacing adjusting hoisting machine 40 has a sheave 44 that is rotationally driven by a motor 42 (FIG. 2) which is an auxiliary drive device. A rope 46 for adjusting the car spacing is hung on the sheave 44, and 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 adjusting hoisting machine 40 is rotationally driven in the first direction from the front side to the back side of FIG. 1 by the driving force of the motor 42 (FIG. 2), the upper car 38A and The lower car 38B moves in the direction of approaching each other, and the car distance D between the upper car 38A and the lower car 38B becomes smaller. 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 becomes large. In this way, the car spacing adjusting hoisting machine 40, the sheave 44, and the rope 46 are adjusted so that the car spacing D is changed from the first spacing before adjustment to the second spacing after adjustment by the driving force of the motor 42. Functions as a car spacing adjustment mechanism for adjustment.

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

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

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

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

The upper and lower car 38A doors 56A and 56B and the lower car 38B doorway 58A and 58B open and close, provided that the upper car 38A and the lower car 38B are at the landing positions on the respective destination floors. It will be possible.

The car doors 56A and 56B of the upper car 38A are opened on both sides, and are opened and closed by a car door drive device (not shown). At the entrance / exit of the upper car 38A, an upper car door open detection switch 60 (FIG. 2) for detecting an open state (door open state) of the car doors 56A and 56B is provided. The car doors 58A and 58B of the lower car 38B are also opened on both sides like the car doors 56A and 56B of the upper car 38A, and are opened and closed by a car door drive device (not shown) different from the upper car 38A side. .. A lower car door open detection switch 62 (FIG. 2) for detecting an open state (door open state) of the car doors 58A and 58B is also provided at the entrance and exit of the lower car 38B. For the upper car door open detection switch 60 and the lower car door open detection switch 62, for example, a limit switch with a forced opening mechanism is used.

Further, although not shown, the landing doors provided at the landing on each floor of the building are also provided with landing door open detection switches 64A, ... 64B (FIG. 3). Similar to the car doors 56A, 56B, 58A, and 58B, limit switches with a forced opening mechanism are also used for the landing door opening detection switches 64A, ... 64B. An interlock mechanism is adopted on the landing door side to release the lock by opening the car doors 56A, 56B, 58A, and 58B.

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

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

As shown in FIG. 2, the main control device 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 opening / closing control of the car doors 56A, 56B, 58A, 58B at the entrances and exits of the upper car 38A and the lower car 38B, etc. 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 opening.

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

The car spacing control device 80 also incorporates a car safety circuit 86. 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 is driven when any abnormality is detected by these sensors or switches. It is configured to cut off power to the magnetic contactor connected to the source.

Subsequently, 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 spacing control device 80 includes a car safety circuit 86. In the car safety circuit 86, the upper car door open detection switch 60 and the lower car door open detection switch 62 are connected in series, and further, each of the landing door open detection switches 64A, ... 64B on each floor also opens the upper car door. The detection switch 60 and the lower car door open detection switch 62 are connected in series. Hereinafter, this series circuit portion will be referred to as a "door open detection circuit".

A bypass circuit 88 is provided so as to bypass the door opening detection circuit. The bypass circuit 88 includes a contact 88a of the first magnetic contactor BP1 and a contact 90a of the second magnetic contactor BP2, which are safety switches. Both the contact 88a and the contact 90a are 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 open detection switch 60 and the lower car door open detection switch 62 are connected in parallel.

The car interval control device 80 also has an inverter 92 that drives and controls the motor 42. A relay switch 94 and an electromagnetic coil 96b are provided in the electric circuit between the inverter 92 and the door opening 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 with the inverter 92, and 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 magnetic contactor IV operates, and the electric circuit between the inverter 92 and the motor 42 becomes conductive. A breaker switch 98 is provided in the electric circuit between the relay switch 94 and the door open detection circuit.

A brake release switch 100 and an electromagnetic coil 102b are provided in the electric circuit between the door open detection circuit and the brake device 48 via the breaker switch 98. The brake release switch 100 is a relay contact corresponding to the electromagnetic coil 104b of the electromagnetic relay ER described later, and is controlled to be turned on / off by the CPU 82. The electromagnetic coil 102b is a coil of an electromagnetic contactor BK provided for operating the brake device 48, and 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 magnetic contactor BK operates, and the brake device 48 is in an open state.

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 the excitation of the electromagnetic coil 104b.

The electromagnetic relay ER has two electromagnetic coils 106b and 108b in addition to the electromagnetic coil 104b 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 is 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, 108a corresponding to the electromagnetic coils 106b, 108b, respectively. All of these contacts 106a and 108a are b contacts that are turned off when the electromagnetic coils 106b and 108b are excited and turned on when the electromagnetic coils 106b and 108b are not excited. The contact 106a and the contact 108a are connected in parallel. Then, the electromagnetic coil 88b that operates the contact 88a of the first magnetic 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 The electromagnetic coil 90b that operates 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 circuit configuration has a b contact in the electric path between the brake release switch 100 and the contact 88a of the first magnetic contactor BP1 and the contact 90a of the second magnetic contactor BP2, which are safety switches. The contacts 88a and 90a include an electromagnetic relay ER having contacts 106a and 108a, which are interlocked with 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 structure like this.

Subsequently, the operation of the car interval control device 80 having the above circuit configuration will be described with reference to FIGS. 1 to 3. First, the operation when the door is closed will be described by exemplifying 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 spacing D is adjusted when the outer car frame 30 moves in the hoistway 12. At this time, the car doors 56A and 56B of the upper car 38A and the car doors 58A and 58B of the lower car 38B are all in a closed state (door closed state). Of course, all the landing doors are also closed. At this time, in the car interval control device 80, the upper car door opening detection switch 60, the lower car door opening detection switch 62, and the landing door opening detection switches 64A, ... 64B of the door opening detection circuit are all turned on. The function of the car safety circuit 86 is maintained 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 magnetic contactor IV. As a result, the electric circuit between the inverter 92 and the motor 42 becomes conductive, 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 magnetic contactor BK operates. As a result, the brake device 48 is opened.

The upper car 38A and the lower car 38B are relatively moved by the driving force of the motor 42, and when 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. Cut off the power supply to. As a result, the brake device 48 is activated, and the car interval D is maintained at the second interval.

As described above, the car interval control device 80 is configured to be able to execute the required drive control while maintaining the function of the car safety circuit 86 by the door open detection circuit when the door is closed.

Next, the operation at the time of opening the door will be described by exemplifying 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 while the outer car frame 30 is moving, 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 keep the car interval D at the second interval.

When the electromagnetic coil 104b of the electromagnetic relay ER is in a non-excited state in order 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. It becomes a non-excited state. Then, the contacts 106a and 108a of the electromagnetic relay ER, which are the b contacts, are turned on, and the electromagnetic coil 88b of the first magnetic contactor BP1 and the electromagnetic coil 90b of the second magnetic contactor BP2 are excited, respectively, and as a result, the bypass circuit The contacts 88a and 90a of 88 are turned on.

Here, when the upper car 38A car doors 56A, 56B or the lower car 38B car doors 58A, 58B are in the open state (door open state), the upper car door open detection switch 60 and the lower car door open detection switch 62 One of them 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 open detection circuit are turned on, the function of the car safety circuit 86 is maintained by the bypass circuit 88.

As described above, the car interval control device 80 is configured so that the function of the car safety circuit 86 is maintained by the bypass circuit 88 when the door is open.

Subsequently, the operation when the control runaway occurs in the car interval control device 80 on the sub-control device side and the door open running occurs will be described.

As described above, when the upper car 38A and the lower car 38B land on the respective destination floors and the respective car doors 56A, 56B, 58A, and 58B are open, the brake release switch 100 is turned off. Normally, the braking force of the braking device 48 acts, and the upper car 38A and the lower car 38B do not travel. However, if the car interval control device 80 goes out of control, the brake release switch 100 may be turned on even though 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 be able 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 transferred to the electromagnetic coil 104b. In synchronization, they are excited. Then, the contacts 106a and 108a of the electromagnetic relay ER, which are the b contacts, are turned off, and the electromagnetic coil 88b of the first magnetic contactor BP1 and the electromagnetic coil 90b of the second magnetic contactor BP2 are in a non-excited state, respectively. 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 that 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 is activated and the running 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 to shut off the car safety circuit 86.

According to the car interval control device 80 having the above configuration, when the door is opened, even if the power supply to the inverter 92, which is the control unit for driving and controlling the motor 42, is continued, when the door is opened, 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 the motor 42 can be cut off. Therefore, as in the conventional case, 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, they are provided in the electric circuit between the inverter 92 and the motor 42. It is not necessary to bother to shut off the magnetic contactor IV. As a result, in the car interval control device 80, the frequency of interrupting the power supply to the motor 42, and by extension, the frequency of operating the magnetic contactor IV, which is an electronic component used for the interruption, is reduced. It is possible to suppress the shortening of the life of the contactor IV.

Further, since the car interval control device 80 is installed on the upper beam 32 of the outer car frame 30 near the upper car 38A, when the electromagnetic contactor IV is frequently operated as in the conventional case, the operation noise thereof. This may cause discomfort to the passengers in the upper car 38A, but such a situation occurs because the car interval control device 80 operates the magnetic contactor IV less frequently than before. It is also advantageous in that it can suppress 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 electromagnetic contactor IV. For example, the next destination floor is an adjacent floor. In the case of short-floor operation such as, there is a possibility that the car interval adjustment is not completed while the outer car frame 30 is moving, but the car interval control device 80 does not need to restart the electromagnetic contactor IV. It also has an advantageous effect as compared with the conventional case in that the car spacing adjustment can be started as soon as possible.

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

<Modification example>
(1) In the above embodiment, the bypass circuit 88 is provided with two electromagnetic relay ER contacts 106a and 108a, and the circuit configuration is a double system fault-tolerant design. However, the bypass circuit has one electromagnetic relay contact. It doesn't 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 of preventing the door open running can be exhibited as in the above embodiment. There is no change in.

(2) In the above embodiment, the circuit configuration is such that the contact 96a of the magnetic contactor IV is connected to the electric circuit between the inverter 92 and the motor 42, but the electric path between the inverter 92 and the power supply is electromagnetically contacted. The circuit configuration may be such that the contact 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 near the upper car 38A, but the present invention is not limited to this, and for example, the outside near the lower car 38B. It may be installed on the lower beam 34 of the car frame 30.

(4) In the above embodiment, the upper car 38A car doors 56A and 56B and the lower car 38B car doors 58A and 58B are both left and right double doors with one single door on one side, but two doors on one side. It does not matter if the (four-door) door is open on both sides. Further, the car door is not limited to the left and right double opening, and of course, a single opening may be adopted. In that case, the number of car doors may be one, or two or more.

(5) In the above embodiment, the traction type car spacing adjustment in which the upper car 38A is connected to one end of the rope 46 hung on the sheave 44 of the car spacing adjusting hoisting machine 40 and the lower car 38B is connected to the other end. A mechanism was adopted, but for example, a fixed car with the lower car fixed to the lower beam of the outer car frame, a counter weight hung at the other end of the rope that hangs the upper car at one end, and a movable car with the upper car. It may be configured to be used.

The present invention can also be carried out in a mode in which various improvements, modifications, or modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Further, within the range in which the same action or effect is produced, any of the invention-specific matters may be replaced with another technique.

10 Double elevator 12 Hoistway 30 Outer car frame 38A Upper car 38B Lower car 42 Motor 40 Car interval adjustment hoist 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 (2)

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