JP4510989B2 - Double deck elevator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a double deck elevator in which a plurality of cars are provided in a car frame and the vertical distance between the plurality of cars can be adjusted.
[0002]
[Prior art]
Conventionally, as a double deck double deck elevator having a floor space correction function for making a space between cabs coincide with a target floor side for a building having a different floor space, for example, as shown in FIG. JP-A-48-76242). In general, double deck elevators have multiple cabs, so they have higher transport capacity than ordinary elevators. However, when multiple cabs are fixed to the car frame, the intervals in the hoistway are different. If there is a floor, the upper and lower cars cannot be landed at that location. Therefore, there is a floor gap correction mechanism as means for solving this problem, and this mechanism will be described with reference to FIG.
[0003]
In FIG. 5, reference numeral 1 denotes a car frame. The car frame 1 supports two upper and lower car chambers 2 a and 2 b and is driven up and down along a guide rail 3 by being driven by a hoisting machine (not shown). Moving. As a floor space correction mechanism, the upper car room 2a is guided by a sub guide rail 4 provided in the car frame 1 to move up and down, and the distance from the lower car room 2b is changed. The cab 2 a is driven by the hydraulic jack 5 and the link mechanism 6.
[0004]
A drive mechanism for driving the cab 2a will be described with reference to FIGS. 6 (a) and 6 (b). 6 (a) and 6 (b), reference numerals 7a and 7b denote upper frames, and these upper frames 7a and 7b are fixed to the lower surface of the upper cab 2a. Reference numerals 8a and 8b denote lower frames, and these lower frames 8a and 8b are fixed to the vertical frames 9a and 9b above the lower cab 2b. Reference numerals 10a and 10b denote links. The upper ends of the links 10a and 10b are pivotally supported by the upper frames 7a and 7b, and rollers 11a and 11b are pivotally attached to the lower ends. The roller 11a rolls in the lower frames 8a and 8b and is guided in the lateral direction. Reference numerals 12a and 12b denote other links. These links 12a and 12b are pivotally supported at lower ends by the lower frames 8a and 8b, and rollers 13a and 13b are pivotally attached to the upper ends. The rollers 13a and 13b roll in the upper frames 7a and 7b. The link 10a and the link 12a, and the link 10b and the link 12b are rotatably connected by pins 14a and 14b, respectively. The lower end of the hydraulic jack 5 is pivotally supported by the lower frames 8a and 8b, and the upper end is pivotally supported by the links 10a and 10b.
[0005]
FIG. 7 is a switch circuit diagram relating to cab driving in the conventional example shown in FIG. In FIG. 7, (+) (-) indicates a DC power source, reference numeral 15 is a limit switch that is pushed and opened only when the upper cab 2a is at the uppermost position, and reference numeral 16 is opened only when it is at the lowermost position. When the switch 15 or 16 is pressed, the space between the upper and lower cabs is held at a position with a wide space or a narrow space. 7, reference numeral 17 denotes an electromagnetic contactor for driving a pump (not shown) for supplying pressure oil to the hydraulic jack 5, reference numeral 17a denotes a normally closed contact, and reference numeral 18 similarly discharges the pressure oil from the hydraulic jack 5. An electromagnetic contactor for actuating a control valve of the hydraulic system, reference numeral 18a is a normally closed contact, 19a and 19b are normally open contacts of a relay (not shown) energized when all elevator doors are closed, reference numeral 20 Is a normally open contact of a relay (not shown) that is energized when the car in operation decides to decelerate in order to land on a floor with a wide interval. This is a normally open contact of a relay (not shown) that is energized when the doll moves to a place with a narrow floor space.
[0006]
Next, the operation of the above-described conventional double deck elevator will be described. At first, when a car that is landing in a place where the floor space is narrow moves to a place where the floor space is wide by a command from the in-car operation button or the hall operation button, one of the restriction switches 16 is first pressed. In the open state, the other limit switch 15 is open and closed. When the door of the hall is closed (relays 19a and 19b are closed) and the car moves and starts decelerating toward a place where the target floor is wide, the relay 20 is closed and (+)-20-19a A circuit of -15-18a-17 (-) is formed and the contactor 17 is energized. As a result, the hydraulic oil is supplied to the hydraulic jack 5 and the upper cab 2a is pushed upward to widen the cab space. When the upper cab 2a moves and the limit switch 15 is pushed, the limit switch 15 is opened, the supply of pressure oil to the hydraulic jack 5 is cut off, and the upper cab 2a is kept in that position.
[0007]
Next, in the case where the car is landing in a place where the floor interval is wide or the car is going to a narrow place, the limit switch 15 is pushed and opened. Further, when starting toward a narrow floor, the relay 21 is closed, a circuit of (+)-21-19b-14-17a-18-(−) is formed, and the pressure oil is discharged from the hydraulic jack 5, and the upper side. The cab 2a is moved downward.
[0008]
In addition to the conventional example described above, FIG. 8 shows a configuration in which shock absorbers are provided at the upper and lower ends of the moving range of the upper and lower cabs as a safety control device peculiar to the floor space correction mechanism (see Japanese Patent Laid-Open No. 10-279231) . In the double deck double deck elevator shown in FIG. 8, the upper and lower cabs 23a and 23b are connected by a link 24 so as to move in directions opposite to each other, and the cabs 23a and 23b are driven by the upper cab 23a. By a ball screw 25 provided above the head. A shock absorber 26 is provided below the upper and lower cabs 23a and 23b, and the upward and downward movements of the cabs 23a and 23b can be braked.
[0009]
[Problems to be solved by the invention]
Since the floor spacing correction mechanism described above has a configuration in which a smaller elevator equipment is provided in a general elevator car, the safety of the floor spacing correction mechanism requires consideration equivalent to that of an elevator.
[0010]
However, the conventional example shown in FIGS. 5 to 7 has the following problems. That is, it does not have a function of stopping the floor space correction mechanism when the floor space correction mechanism is deteriorated or damaged, or when a malfunction occurs in control due to welding of a limit switch contact or the like. This is a serious problem especially when the difference in floor spacing is large and the vertical movement distance of the cab is large.
[0011]
The conventional example shown in FIG. 8 also has a buffer mechanism (buffer device) that works when the upper and lower cabs exceed the allowable operating range, but it collides with the buffer due to welding of the position detection switch. In such a case, the drive unit of the floor spacing correction mechanism continues to operate even after a collision, so that an overload is applied to the drive motor or the like, and the mechanism is damaged or the life is adversely affected. In addition, in the case of a mechanism with a greater load, deterioration such as wear over time generally appears.
[0012]
The present invention has been made in view of the above-described problems. In order to ensure the safety of the user and protect the equipment, the present invention has a function of detecting the deterioration of the floor gap correction mechanism and an emergency stop function when the apparatus is abnormal. An object is to provide an equipped elevator.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, a double deck elevator according to the present invention includes a car frame disposed in a hoistway so as to be capable of being raised and lowered, and a plurality of cars provided in the car frame and landing on different floors. A floor space correction mechanism for adjusting the space between the plurality of cars to match the target floor side even for buildings with different floor spaces in the road, and the floor space correction A safety control device for coping with an abnormality in the mechanism, the floor gap correction mechanism is an electric motor for moving the car relative to the car frame, and the brake is released when the electric motor is operated, An electromagnetic brake that restricts the movement of the car relative to the car frame by generating a braking force when the motor is stopped, and the safety control device is configured such that the car exceeds an allowable operating range with respect to the car frame. Moved A detector that operates in combination to stop the electric motor and operate the electromagnetic brake; and a shock absorber that supports the car when the car moves beyond an allowable operating range with respect to the car frame. The floor gap correction mechanism has a ball screw mechanism having a ball screw driven by the electric motor, and the safety control device outputs a pulse in synchronization with the rotation of the ball screw. And further integrating the pulses from the pulse generator to detect the position of the car relative to the car frame, and stopping the motor when the pulse from the pulse generator is interrupted to stop the electromagnetic brake. The safety control device is installed corresponding to each of the ball screws of the plurality of cars, and the car is moved by a specified movement amount. A car positioning switch to be provided, the pulse generator is provided for each of the plurality of ball screws, and the plurality of the pulse counts from the pulse generator are used as a reference when the car positioning switch operates. The cars are compared with each other, and when the difference in pulse count between the plurality of cars exceeds a predetermined value, the motor is stopped and the electromagnetic brake is operated.
[0014]
In order to solve the above problems, a double deck elevator according to the present invention includes a car frame disposed in a hoistway so as to be capable of being raised and lowered, and a plurality of cars provided in the car frame and landing on different floors. A floor space correction mechanism for adjusting the space between the plurality of cars to match the target floor side even for buildings with different floor spaces in the road, and the floor space correction A safety control device for coping with an abnormality in the mechanism, the floor gap correction mechanism is an electric motor for moving the car relative to the car frame, and the brake is released when the electric motor is operated, An electromagnetic brake that restricts the movement of the car relative to the car frame by generating a braking force when the motor is stopped, and the safety control device is configured such that the car exceeds an allowable operating range with respect to the car frame. Moved A detector that operates in combination to stop the electric motor and operate the electromagnetic brake; and a shock absorber that supports the car when the car moves beyond an allowable operating range with respect to the car frame. The floor gap correction mechanism has a ball screw mechanism having a ball screw driven by the electric motor, and the safety control device outputs a pulse in synchronization with the rotation of the ball screw. And further integrating the pulses from the pulse generator to detect the position of the car relative to the car frame, and stopping the motor when the pulse from the pulse generator is interrupted to stop the electromagnetic brake. A plurality of ball screws are provided for each of the cages, and the pulse generator is provided for each of the plurality of ball screws. The control device is installed corresponding to each of the plurality of ball screws, further includes a car positioning switch that detects that the car has moved by a specified movement amount, and the time when the car positioning switch is operated is used as a reference. The pulse count amount from the pulse generator is compared between a plurality of the ball screws belonging to the common car, and the difference in the pulse count amount between the plurality of ball screws exceeds a specified value. Is characterized in that the electric motor is stopped and the electromagnetic brake is operated.
[0015]
Preferably, the safety control device further includes a position detection switch for detecting that the car has reached a predetermined position within an allowable operation range of the car, and the car reaches the predetermined position and the position is reached. The speed of the car when the detection switch is activated is determined based on the pulse from the pulse generator. When the speed of the car exceeds a specified value, the motor is stopped and the electromagnetic brake is operated. I will let you.
[0016]
Preferably, the safety control device stops the electric motor and activates the electromagnetic brake when a load torque acting on the electric motor exceeds a specified value.
[0017]
In order to solve the above problems, a double deck elevator according to the present invention includes a car frame disposed in a hoistway so as to be capable of being raised and lowered, and a plurality of cars provided in the car frame and landing on different floors. A floor space correction mechanism for adjusting the space between the plurality of cars to match the target floor side even for buildings with different floor spaces in the road, and the floor space correction A safety control device for coping with an abnormality in the mechanism, the floor gap correction mechanism is an electric motor for moving the car relative to the car frame, and the brake is released when the electric motor is operated, An electromagnetic brake that restricts the movement of the car relative to the car frame by generating a braking force when the motor is stopped, and the safety control device is configured such that the car exceeds an allowable operating range with respect to the car frame. Moved A detector that operates in combination to stop the electric motor and operate the electromagnetic brake; and a shock absorber that supports the car when the car moves beyond an allowable operating range with respect to the car frame. And the plurality of cars includes an upper car and a lower car, and further includes a holding device that holds the upper and lower cars at appropriate positions in the car frame, and the holding device includes the upper car An upper cage for holding a cage and a lower cage for holding the lower cage, wherein the upper cage is disposed below the floor surface of the upper cage, and the lower cage The vessel is arranged above the ceiling surface of the lower car.
[0018]
Preferably, the safety control device is configured so that the detector is operated before the car collides with the shock absorber when the car moves beyond an allowable operation range with respect to the car frame. To do.
[0019]
Preferably, the apparatus further includes a compression device for holding the shock absorber in a compressed state as necessary.
[0020]
Preferably, a guide rail provided on the car frame for guiding the movement of the car relative to the car frame, a guide device provided on the car and moving along the guide rail, and the guide rail And a detachment prevention mechanism for preventing the guide device from falling off.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a double deck elevator according to an embodiment of the present invention will be described with reference to the drawings.
[0024]
FIG. 1 is a view showing a car of a double deck elevator according to the present embodiment. In FIG. 1, reference numeral 31 denotes a main car frame. The main car frame 31 includes an upper frame 31a for connecting a main rope, left and right vertical frames. A frame 31b, an intermediate frame 31c, a lower frame 31d for receiving a shock absorber (not shown) in the hoistway pit, and the like.
[0025]
The intermediate frame 31c and the lower frame 31d are provided with a shock absorber 33 that brakes the upper and lower cars 32a and 32b. The shock absorber 33 is one of safety control devices for dealing with an abnormality in the floor gap correction mechanism. It is. That is, the shock absorber 33 elastically supports the cars 32a and 32b by the collision of the cars 32a and 32b when the upper and lower cars 32a and 32b move beyond the allowable operation range with respect to the main car frame 31. Specifically, it can be constituted by an elastic body such as a hydraulic damper or a coil spring.
[0026]
The vertical frame 31b is provided with a cab guide rail 34b having a stopper 34a that prevents the cars 32a and 32b from falling off when the cars 32a and 32b move beyond the allowable operating range. The upper and lower cars 32a and 32b are structured to move in the vertical direction while being guided by the car room guide rail 34b. The upper car frame 35a and the upper car room 36a, and the lower car frame 35b and the lower car room, respectively. 36b.
[0027]
A driving portion of the floor space correction mechanism, which is provided on the vertical frame 31b and includes a ball screw 37, a bearing portion 38, and an electric motor 39, is engaged with the upper car frame 35a and the lower car frame 35b. Two ball screws 37 are provided, and the upper cage frame 35a and the lower cage frame 35b are arranged in the opposite directions of the screw rails in the upper screws 37a and 37c and the lower screws 37b and 37d. Then, each moves in the direction opposite to the rotation of the screw. The electric motor 39 is provided with an electromagnetic brake 40 that operates when the voltage is cut off, and the ball screw 35 is provided with a pulse generator (pulse generator) 41 that outputs a pulse in synchronization with the rotation of the ball screw 35. .
[0028]
The main car frame 31 is provided with a plurality of switches for detecting the positions of the upper and lower cars 32a and 32b. In FIG. 1, all the switches are of the lever structure, and each of the switches has a mechanism in which the rollers at the end of each lever are displaced by arcuate plate cams 42a to 42f provided on the upper and lower car frames 35a and 35b. . Regarding each switch, first, the switches 43a and 43b are switches that operate at the upper and lower limits of the allowable operating range of the lower car 32a and reset the pulse count. The safety control device recognizes the positions of the upper and lower cars 32a and 32b by counting the output of the pulse generator 41, but deletes the integrated amount recorded at the upper and lower limits of the movement range, that is, the car movement amount. That is, the operating points of the reset switches 43a and 43b are reference positions for controlling the upper and lower cars 32a and 32b.
[0029]
Next, various switches constituting a part of the safety control device for dealing with an abnormality in the floor gap correction mechanism will be described. The limit switches 44a and 44b are normally closed contacts that operate when the lower car 32b moves to some extent beyond the allowable operating range, and are connected to the power supply circuit of the drive unit of the floor gap correction mechanism. Further, the switches 45a to 46d and 46a to 46d are car positioning switches that detect a specified movement amount from the reference position with respect to the direction in which the car interval is widened and the direction in which the car is shrunk. The switches 45a to d and the switches 46a to 46d are in positions where they are simultaneously operated if there is no wear on each rail of the ball screw 37. Plate cams 42a, 42b, 42d and 42e for operating these switches are provided at the engaging portions between the upper and lower car frames 35a and 35b and the ball screws 37a to 37d.
[0030]
The floor spacing correction mechanism in the elevator according to the present embodiment uses the ball screw mechanism as described above. The advantage of this mechanism is that it is relatively small and can be positioned with high precision. Furthermore, the weights of the upper and lower cars 32a and 32b are carried by a plurality of balls, and the support points are screwed. Since it is distributed in the shape rail, the situation of falling due to destruction is prevented and the safety is high.
[0031]
However, as an inherent problem, there is a problem of wear of the screw rail. Since the ball that has received a load corresponding to the weight of the upper and lower cages 32a and 32b always rolls on the rail, the pressure-receiving surface side of the rail wears over time. As a result, the upper and lower cages 32a and 32b are both Both may be displaced downward from the regular position.
[0032]
Therefore, in the double deck elevator according to the present embodiment, five problem events related to the floor gap correction mechanism including the aged wear of the screw rail, that is, (1) car operating range exceeded, (2) overload, (4) car When the position change (wear of the thread rail) and (5) the car position cannot be detected, they are detected to stop the operation of the floor space correction mechanism.
[0033]
Next, the operation of each device constituting the elevator according to the present embodiment will be described.
[0034]
In normal operation, the upper and lower cars 32 a and 32 b move in opposite directions due to the rotation of the ball screw 37. When the car interval coincides with the target floor interval and the operation of the floor interval correction mechanism is completed and the current to the motor 39 is cut off, the electromagnetic brake 40 is activated and the upper and lower cages 32a, 32b are operated. Hold the position. When the floor gap correction mechanism is in operation, the safety control device that integrates the signal from the pulse generator 41 is a switch 45a to d or a switch 46a that detects the position of the upper and lower cars 32a and 32b when the pulse is interrupted. If the car speed when one of -d is activated exceeds a specified value, the current to the motor 39 of the floor gap correction mechanism is cut off and the electromagnetic brake 40 is activated.
[0035]
The switches 45a to 45d and the switches 46a to 46d for detecting the car position play a role of detecting wear of the ball screws 37a to 37d as well as determining the timing of detecting the car speed. The installation positions of the switches 45a to d and the switches 46a to 46d are set at the time of initial adjustment so that all the switches belonging to the group of the switches 45a to 45d or the group of the switches 46a to 46d operate simultaneously.
[0036]
However, when the positions of the upper and lower cars 32a and 32b are lowered from the normal positions due to the aging of the screw rails, the switches 45a and 45c of the upper car 32a are operated in the direction in which the distance between the cars is increased. When the switches 45b and 45d of the lower car 32b are actuated first, and when operating in the direction of contraction, the switches of the lower car 32b than the switches 46b and d of the upper car 32a. 46a and c operate first. Further, when the upper or lower car 32a, 32b is inclined due to wear due to the unbalanced load applied to the car chambers 36a, 36b, the left and right switches provided for the upper and lower cars 32a, 32b are operated. A time difference occurs.
[0037]
The safety control device monitors the switch operation timing of the switches 45a to 46d and 46a to 46d, compares the pulse count when the switch is first operated with the pulse count when the switch is last operated, and the difference is a specified value. Even if it exceeds, the floor gap correction mechanism is stopped. Furthermore, the safety control device monitors the load torque of the motor 39 of the floor gap correction mechanism, and the load torque becomes a specified value due to the inclination of the upper or lower car 32a, 32b due to foreign matter intrusion into the rail or wear. Even if it exceeds, the floor gap correction mechanism is stopped.
[0038]
Up to now, the safe operation by the safety control device has been described as the action of each device. However, the upper or lower car 32a, 32b is allowed to operate within the allowable operation range due to the malfunction of the safety control device or the position detection switches 45a-d, 46a-d. When moving beyond the upper limit, the upper or lower car 32a, 32b collides with the shock absorber 33 and stops. Even in this case, since the limit switches 44a and 44b between the shock absorber 33 and the reset switches 43a and 43b are operated, the motor 39 is stopped before the collision with the shock absorber 33 and the electromagnetic brake 40 is activated. No overload is applied to the floor spacing correction mechanism.
[0039]
Next, as safety measures at the time of replacement work or the like of the deteriorated portion of the floor gap correction mechanism, a device that compresses the shock absorber 33 as necessary and a holding device for the upper and lower cages 32a and 32b are shown in FIGS. This will be described with reference to FIG.
[0040]
In a state where the upper and lower cars 32a and 32b collide and the shock absorber 33 is compressed, elastic energy is stored in the shock absorber 33, and the upper and lower car frames 35a and 35b are restrained. Removal and adjustment of the guide device 48 and the ball screw 37, etc., are dangerous. FIGS. 2A to 2D show a compression device that forcibly compresses the shock absorber 33 in order to avoid such a danger. The compression device includes frames 31c and 31d that support the shock absorber 33, a compression bolt 49 that passes through the shock absorber 33, a receiving plate 50 that receives the shock absorber 33, and a compression nut 51 that receives a force in the extending direction of the shock absorber 33. Yes.
[0041]
2 (a) and 2 (b) show the compression device in an uncompressed state. Then, in the state where the shock absorber 33 is compressed by the car collision as shown in FIG. 2C, the elastic force is compressed by tightening the compression nut 51 as shown in FIG. 2D. It can be supported by the bolt 49 for use, and the safety | security of the operation | work in the said condition can be ensured.
[0042]
FIGS. 3, 4A, and 4B show a holding device for holding the upper and lower cars 32a and 32b. The holding device temporarily attaches and replaces the upper and lower cars 32a and 32b to the upper and lower car frames 35a and 35b when mounting or exchanging components such as the ball screw 37 that support the upper and lower cars 32a and 32b. 3 is a device for holding the upper car 32a. Reference numeral 52 is a pantograph jack mechanism (upper holder) for supporting the upper car 32a. Reference numeral 53 is a suspension bolt for hanging the lower car 32b. (Lower cage). Both the jack mechanism 52 and the suspension bolt 53 are configured to support the upper and lower cars 32a and 32b by the intermediate frame 31c of the main car frame 31, and the upper and lower cars 32a and 32b are attached when the ball screw 37 is attached. When determining the respective positions, the car 32a and 32b are arranged in consideration of workability so that they can be operated in the same work place.
[0043]
In the present embodiment, the lever-type switch is used as described above, but the switch structure is not limited to the lever-type, and other detectors such as an optical sensor can be used. Further, the holding device for holding the upper and lower cages 32a and 32b is not limited to the jack mechanism 52 and the suspension bolt 53 described above, and a holding jig by another mechanism is used as the floor surface of the upper cage 32a. And a ceiling surface of the lower car 32b. For example, an equivalent effect can be obtained by using a hydraulic jack or the like instead of the pantograph jack.
[0044]
As described above, according to the double deck elevator according to the present embodiment, when an abnormality occurs in the floor gap correction mechanism, it can be handled by the safety control device, so that the safety of the user can be ensured and the floor can be secured. It is possible to prevent the equipment from being damaged due to the abnormality of the floor gap correction mechanism.
[0045]
【The invention's effect】
As described above, according to the double deck elevator according to the present invention, when an abnormality occurs in the floor gap correction mechanism, it can be handled by the safety control device. It is possible to prevent equipment damage caused by an abnormality in the interval correction mechanism.
[Brief description of the drawings]
FIG. 1 is a front view showing a schematic configuration of a double deck elevator according to an embodiment of the present invention.
FIG. 2 is a view showing a compression device in a double deck elevator according to an embodiment of the present invention, and (a) and its XX arrow view (b) each show a state where it is not compressed; (C) shows the state compressed, (d) shows the state which tightened the nut under the compressed state.
FIG. 3 is a front view showing a holding device and its periphery in a double deck elevator according to an embodiment of the present invention.
FIG. 4 is an enlarged view of a portion of a suspension bolt that is a holding device in a double deck elevator according to an embodiment of the present invention, where (a) is a front view and (b) is a side view.
FIG. 5 is a front view showing an example of a conventional double deck elevator.
6A and 6B are diagrams showing a floor space correction mechanism in the conventional example shown in FIG. 5, wherein FIG. 6A is a front view, and FIG. 6B is a side view.
7 is a switch circuit diagram for detecting a car position in the conventional example shown in FIG.
FIG. 8 is a front view showing another example of a conventional double deck elevator.
[Explanation of symbols]
32a Upper basket
32b lower basket
33 shock absorber
34a Guide rail stopper
35a Upper basket frame
35b Lower car frame
37 Ball screw
39 Electric motor
40 Electromagnetic brake
41 Pulse generator
42a-f Plate cam
43a, 43b Pulse count reset switch
44a, 44b Limit switch (detector)
45a-d, 46a-d Car positioning switch
49 Compression bolt
50 Back plate
51 Nut for compression
52 Pantograph jack
53 Hanging bolt

Claims (8)

A car frame arranged to be movable up and down in a hoistway, a plurality of cars provided in the car frame and landing on different floors, and a building having a different interval between floors in the same hoistway A floor space correction mechanism for adjusting the distance between the plurality of cars to match the target floor and landing, and a safety control device for coping with an abnormality in the floor space correction mechanism. ,
The floor gap correction mechanism includes an electric motor for moving the car relative to the car frame, and a brake is released when the electric motor is operated, while a braking force is generated when the electric motor is stopped to generate the braking force on the car frame. An electromagnetic brake for restricting the movement of the car,
The safety control device operates when the car moves beyond an allowable operation range with respect to the car frame, stops the electric motor and activates the electromagnetic brake, and the car frame. A shock absorber that supports the car when the car moves beyond an allowable operating range;
The floor clearance correction mechanism has a ball screw mechanism having a ball screw driven by the electric motor,
The safety control device further includes a pulse generator that outputs a pulse in synchronization with the rotation of the ball screw, and integrates pulses from the pulse generator to detect the position of the car relative to the car frame. , When the pulse from the pulse generator is interrupted, the motor is stopped and the electromagnetic brake is operated,
The safety control device further includes a car positioning switch that is installed corresponding to each of the ball screws of the plurality of cars, and that detects that the car has moved by a specified movement amount, Each of the pulse generators is provided, and the number of pulses counted from the pulse generator is compared between the plurality of cars based on the time when the car positioning switch is operated, and the number of pulses counted by the plurality of cars is compared. The double deck elevator characterized in that when the difference in quantity exceeds a specified value, the electric motor is stopped and the electromagnetic brake is operated. A car frame arranged to be movable up and down in a hoistway, a plurality of cars provided in the car frame and landing on different floors, and a building having a different interval between floors in the same hoistway A floor space correction mechanism for adjusting the distance between the plurality of cars to match the target floor and landing, and a safety control device for coping with an abnormality in the floor space correction mechanism. ,
The floor gap correction mechanism includes an electric motor for moving the car relative to the car frame, and a brake is released when the electric motor is operated, while a braking force is generated when the electric motor is stopped to generate the braking force on the car frame. An electromagnetic brake for restricting the movement of the car,
The safety control device operates when the car moves beyond an allowable operation range with respect to the car frame, stops the electric motor and activates the electromagnetic brake, and the car frame. A shock absorber that supports the car when the car moves beyond an allowable operating range;
The floor clearance correction mechanism has a ball screw mechanism having a ball screw driven by the electric motor,
The safety control device further includes a pulse generator that outputs a pulse in synchronization with the rotation of the ball screw, and integrates pulses from the pulse generator to detect the position of the car relative to the car frame. , When the pulse from the pulse generator is interrupted, the motor is stopped and the electromagnetic brake is operated,
A plurality of the ball screws are provided for each car, and the pulse generator is provided for each of the plurality of ball screws.
The safety control device is installed corresponding to each of the plurality of ball screws, further includes a car positioning switch that detects that the car has moved by a specified movement amount, and a time point when the car positioning switch is operated. As a reference, the pulse count amount from the pulse generator was compared between a plurality of the ball screws belonging to the common car, and the difference in the pulse count amount between the plurality of ball screws exceeded a specified value. In this case, the electric motor is stopped and the electromagnetic brake is operated.   The safety control device further includes a position detection switch that detects that the car has reached a predetermined position within an allowable operation range of the car, and the position detection switch is activated when the car reaches the predetermined position. The speed of the car at the time is determined based on the pulse from the pulse generator, and when the speed of the car exceeds a specified value, the motor is stopped and the electromagnetic brake is operated. The double deck elevator according to claim 1 or 2.   The double deck elevator according to claim 3, wherein the safety control device is configured to stop the electric motor and operate the electromagnetic brake when a load torque acting on the electric motor exceeds a specified value. A car frame arranged to be movable up and down in a hoistway, a plurality of cars provided in the car frame and landing on different floors, and a building having a different interval between floors in the same hoistway A floor space correction mechanism for adjusting the distance between the plurality of cars to match the target floor and landing, and a safety control device for coping with an abnormality in the floor space correction mechanism. ,
The floor gap correction mechanism includes an electric motor for moving the car relative to the car frame, and a brake is released when the electric motor is operated, while a braking force is generated when the electric motor is stopped to generate the braking force on the car frame. An electromagnetic brake for restricting the movement of the car,
The safety control device operates when the car moves beyond an allowable operation range with respect to the car frame, stops the electric motor and activates the electromagnetic brake, and the car frame. A shock absorber that supports the car when the car moves beyond an allowable operating range;
The plurality of cars is composed of an upper car and a lower car,
It further has a holding device that holds the upper and lower cages at appropriate positions in the cage frame, and the holding device holds the upper cage for holding the upper cage and the lower cage. The upper cage is disposed below the floor surface of the upper cage, and the lower cage is disposed above the ceiling surface of the lower cage. Double deck elevator featuring   The safety control device is characterized in that the detector is operated before the car collides with the shock absorber when the car moves beyond an allowable operation range with respect to the car frame. The double deck elevator according to any one of claims 1 to 5.   The double deck elevator according to any one of claims 1 to 6, further comprising a compression device for holding the shock absorber under a compressed state as necessary.   A guide rail provided on the car frame for guiding the movement of the car relative to the car frame, a guide device provided on the car and moving along the guide rail, and the guide device from the guide rail The double deck elevator according to any one of claims 1 to 7, further comprising a detachment prevention mechanism for preventing the detachment.

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