JP2012086970A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to a shuttle operation and improve the degree of freedom of the operation, without using a mechanism of mechanically connecting cars with each other and a mechanism of adjusting an interval between upper and lower cars.SOLUTION: The operation mode of an elevator control device 12 includes: an independent operation mode in which the cars 2, 4 are caused to travel respectively independently; and a synchronizing operation mode in which the cars 2, 4 are caused to travel integrally in synchronization with each other while being arranged in proximity to each other. Safety control devices 16, 17 switch the safety standards of independent operation and the safety standards of synchronizing operation in accordance with the switching of operation modes of the elevator control device 12 to determine the presence or absence of failure. Also, the safety control devices 16, 17 set occupancy sections (sections in which the approach of other cars is prohibited) which are different between the safety standards of independent operation and the safety standards of synchronizing operation with respect to the cars 2, 4 travelling according to calling.

Description

  The present invention relates to a multi-car type elevator apparatus in which a plurality of cars are provided in a common hoistway.

  In recent years, with the increase in the number of buildings, it has been required to increase the speed and capacity of elevator devices and increase the transportation volume. On the other hand, a double deck type elevator having a two-story car and a multicar type elevator in which a plurality of cars are provided in a common hoistway have been proposed.

  However, double-deck elevators are suitable for mass transportation during shuttle operation, but lack the freedom of operation. Further, when the floor heights of adjacent floors change, a mechanism for adjusting the interval between the lower car and the upper car is required.

  On the other hand, multi-car elevators are not suitable for shuttle operation that carries a large number of passengers at a time because the movement of each car is restricted in order to avoid collision between cars.

  In view of this, a multi-car elevator that can connect and disconnect two cars up and down has been proposed as a system that has both of these characteristics (see, for example, Patent Documents 1 to 3).

Japanese Patent No. 4158306 JP-A-8-12205 Japanese Patent Laid-Open No. 5-201642

  However, the elevator disclosed in Patent Document 1 requires a mechanical connecting device for connecting and operating the cars, and the configuration is complicated and the cost increases. In addition, it takes time to connect and disconnect the car, and the operation efficiency decreases. Furthermore, when the floor heights of adjacent floors change, a mechanism for adjusting the interval between the lower car and the upper car is required. Moreover, in the elevator shown in Patent Document 2, it is only possible to select whether to operate with two cars connected or with only one car, and to operate two cars independently. It is not possible and lacks freedom of operation. Furthermore, the elevator shown in Patent Document 3 operates by connecting two cars driven by a linear motor for rescue in the event of a failure. A coupling device is required.

  The present invention has been made to solve the above-described problems, and can handle shuttle operation without using a mechanism for mechanically connecting cars or a mechanism for adjusting the distance between upper and lower cars. An object of the present invention is to provide an elevator apparatus that can be operated and can improve the degree of freedom of operation.

  The elevator apparatus according to the present invention includes a plurality of cars provided in a common hoistway, a plurality of driving apparatuses for independently raising and lowering the cars, and an elevator control for controlling the operation of the car by controlling the driving apparatus. The system is equipped with a safety control device that monitors the state of the car based on information on the position and speed of the car, and shifts the car to a safe state when an abnormality is detected. It includes an independent operation mode in which the car runs independently, and a synchronous operation mode in which the car runs in an integrated manner in close proximity to each other, and the safety control device supports the independent operation mode. The independent operation safety standard and the synchronous operation safety standard corresponding to the synchronous operation mode are set, and the safety control device switches the operation mode of the elevator control device. Depending on, to determine the presence or absence of an abnormality by switching between independent operation safety and synchronous operation safety standards.

  In the elevator apparatus according to the present invention, the operation mode of the elevator control device includes an independent operation mode and a synchronous operation mode, and according to switching of the operation mode of the elevator control device, the independent operation safety standard and the synchronous operation safety standard Since the presence or absence of an abnormality is determined by switching, the shuttle operation can be supported by the synchronous operation mode without using the mechanism for mechanically connecting the cars and the mechanism for adjusting the distance between the upper and lower cars, The degree of freedom of operation can be improved by the independent operation mode.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the multi-car system elevator apparatus by Embodiment 1 of this invention. It is a block diagram which shows the driving | running state in the synchronous operation mode of the elevator apparatus of FIG. It is explanatory drawing which shows the setting state of the occupation area at the time of the driving | running | working start of the car in independent operation mode. It is explanatory drawing which shows the setting state of the occupation area during driving | running | working of the cage | basket | car in independent operation mode. It is explanatory drawing which shows the setting state of the occupation area with respect to the waiting car. It is explanatory drawing which shows the setting state of the occupation area at the time of switching from independent operation mode to synchronous operation mode. It is explanatory drawing which shows the setting state of an occupation area when making the 1st and 2nd cage wait on the floor adjacent up and down. It is explanatory drawing which shows the setting state of the occupation area at the time of the driving | running | working start of the car in synchronous operation mode. It is explanatory drawing which shows the setting state of the occupation area during driving | running | working of the cage | basket | car in independent operation mode. It is a block diagram which shows the multi-car system elevator apparatus by Embodiment 2 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing a multi-car type elevator apparatus according to Embodiment 1 of the present invention. In the figure, in a common hoistway 1, a first car (lower car) 2, a first counterweight 3 corresponding to the first car 2, a second car (upper car) 4, and A second counterweight 5 corresponding to the second car 4 is provided. The second car 4 is provided above (directly above) the first car 2.

  In the upper part of the hoistway 1, a first driving device (first hoisting machine) 6 for raising and lowering the first car 2 and the first counterweight 3, a second car 4 and a second fishing A second driving device (second hoisting machine) 7 for raising and lowering the weight 5 is installed. Each drive device 6 and 7 has a drive sheave, a motor that rotates the drive sheave, and a brake that brakes the rotation of the drive sheave. The first and second cars 2 and 4 are lifted and lowered independently in the hoistway 1 by the driving devices 6 and 7.

  A first suspension means 8 is wound around the drive sheave of the first drive device 6. The first car 2 and the first counterweight 3 are suspended in the hoistway 1 by the first suspension means 8. A second suspension means 9 is wound around the drive sheave of the second drive device 7. The second car 4 and the second counterweight 5 are suspended in the hoistway 1 by the second suspension means 9.

  As the suspension means 8 and 9, for example, a plurality of ropes or a plurality of belts are used. In this example, the cars 2 and 4 and the counterweights 3 and 5 are suspended by a 1: 1 roping method.

  A first shock absorber (lower car buffer) 10 is attached to the upper part of the first car 2. A second shock absorber (upper car buffer) 11 is attached to the lower part of the second car 4.

  The operation of the cars 2 and 4 is controlled by the elevator control device 12. The elevator control device 12 includes a first drive control device 13 that controls the first drive device 6, a second drive control device 14 that controls the second drive device 7, and a car 2 for calls from the landing. And an operation control device 15 that performs the allocation of four. The drive control devices 13 and 14 can communicate each other's information.

  Information related to the call and information related to the position and speed of the cars 2 and 4 are input to the elevator control device 12. When the landing call button (UP / DOWN) is operated, the operation control device 15 assigns either the car 2 or 4 based on the information and information such as the position and speed of the cars 2 and 4. To decide. And an operation command is output with respect to the drive control apparatuses 13 and 14 corresponding to the cage | basket | car 2 and 4 which determined allocation.

  The state of the first car 2 is monitored by the first safety control device 16. The first safety control device 16 monitors the state of the first car 2 based on the information on the position and speed of the first car 2, and when the abnormality is detected, the first car 2 is in a safe state. To migrate. For this reason, the position signal p1 and the speed signal s1 of the first car 2 are input to the first safety control device 16. These signals are directly input to the first safety control device 16 without passing through the elevator control device 12.

  The state of the second car 4 is monitored by the second safety control device 17. The second safety control device 17 monitors the state of the second car 4 based on the information on the position and speed of the second car 4, and when the abnormality is detected, the second car 4 is in a safe state. To migrate. For this reason, the position signal p2 and the speed signal s2 of the second car 4 are input to the second safety control device 17. These signals are directly input to the second safety control device 17 without passing through the elevator control device 12.

  In this example, each of the first drive control device 13, the second drive control device 14, the operation control device 15, the first safety control device 16, and the second safety control device 17 has an independent microcomputer. is doing.

  The first safety control device 16 also receives information on the destination floor of the first car 2 and information on the position, speed and destination floor of the second car 4. Similarly, information on the destination floor of the second car 4 and information on the position, speed, and destination floor of the first car 2 are also input to the second safety control device 17.

  The safety control devices 16 and 17 output a command for stopping the cars 2 and 4 to the nearest floor to the drive control devices 13 and 14 according to the detected degree of abnormality, or emergency stop the cars 2 and 4 For example, to output to the driving devices 6 and 7.

  In addition, information related to the call is input to the safety control devices 16 and 17. The safety control devices 16 and 17 assign the cars 2 and 4 to calls from the landings independently of the operation control device 15. Information relating to the allocation determined by the operation control device 15 is output to the safety control devices 16 and 17. The safety control devices 16 and 17 compare the allocation determined by the safety control devices 16 and 17 with the allocation determined by the operation control device 15, and if the two do not match, the operation of the cars 2 and 4 is prohibited. .

  When the operation of the cars 2 and 4 is determined, the safety control devices 16 and 17 detect the overspeed that smoothly changes between the current position of the cars 2 and 4 and the destination floor according to the position of the cars 2 and 4. Set the pattern. Then, the safety control devices 16 and 17 monitor whether the speed of the cars 2 and 4 does not exceed the set value of the overspeed detection pattern while the cars 2 and 4 are traveling, and the car 2 is detected when the overspeed is detected. , 4 is braked suddenly.

  The safety control devices 16 and 17 may set a plurality of overspeed detection patterns. For example, when a first overspeed detection pattern and a second overspeed detection pattern having a value larger than the first overspeed detection pattern are set and the set value of the first overspeed detection pattern is exceeded Different braking means may be operated when the set value of the second overspeed detection pattern is exceeded. Further, the safety control devices 16 and 17 detect the fall of the cars 2 and 4 and directly brake the cars 2 and 4 based on information such as the tension of the suspension means 8 and 9 and the fall acceleration of the cars 2 and 4. An emergency stop device may be activated.

  The safety control devices 16 and 17 can detect a self-confident failure. When a failure is detected, the safety control devices 16 and 17 output a command for stopping to the nearest floor to the drive control devices 13 and 14.

  Next, the operation mode will be described. The operation modes of the elevator control device 12 include an independent operation mode in which the cars 2 and 4 are independently driven and a synchronous operation mode in which the cars 2 and 4 are integrally driven in a state of being close to each other. It is. FIG. 1 shows an operation state in the independent operation mode, and FIG. 2 shows an operation state in the synchronous operation mode.

  In the safety control devices 16 and 17, an independent operation safety standard corresponding to the independent operation mode and a synchronous operation safety standard corresponding to the synchronous operation mode are set. The safety control devices 16 and 17 switch between the independent operation safety standard and the synchronous operation safety standard in accordance with the switching of the operation mode of the elevator control device 12, and determine whether there is an abnormality.

  In addition, the safety control devices 16 and 17 have different occupied sections (sections where entry of other cars is prohibited) for the cars 2 and 4 traveling according to the call, depending on the independent driving safety standard and the synchronous driving safety standard. While setting, it monitors whether the occupied sections overlap each other while the cars 2 and 4 are traveling. Furthermore, the safety control devices 16 and 17 prohibit the traveling of the cars 2 and 4 such that the occupied sections overlap with each other as the independent operation safety standard.

  FIG. 3 is an explanatory diagram showing a setting state of the occupied section when the cars 2 and 4 start to travel in the independent operation mode. The safety control devices 16 and 17 set a section from the current position of the cars 2 and 4 to the destination floor as an occupied section in the independent operation safety standard. In addition, the occupied section is set to be extended up and down by a distance necessary for emergency stopping the cars 2 and 4.

  FIG. 4 is an explanatory diagram showing a setting state of the occupied section during the traveling of the cars 2 and 4 in the independent operation mode. While the cars 2 and 4 are traveling, the occupied sections change sequentially. That is, the area through which the cars 2 and 4 have passed is sequentially released from the occupied section, and the occupied section is gradually shortened as the cars 2 and 4 approach the destination floor.

  FIG. 5 is an explanatory diagram showing the setting state of the occupied sections for the waiting cars 2 and 4. For the cars 2 and 4 that have not been called and are waiting, a range in which the distance required for emergency stop is secured above and below the cars 2 and 4 is set as the occupied section.

  FIG. 6 is an explanatory diagram showing a setting state of the occupied section when switching from the independent operation mode to the synchronous operation mode. When switching from the independent operation mode to the synchronous operation mode, the first car 2 is moved to a floor adjacent to the floor where the second car 4 is stopped while the second car 4 is in a standby state. At this time, the first car 2 may be put on standby and the second car 4 may be brought closer to the first car 2.

  FIG. 7 is an explanatory diagram showing the setting state of the occupied section when the first and second cars 2 and 4 are made to stand by on the adjacent floors. Even during the operation of bringing the first car 2 closer to the second car 4 and when the first and second cars 2 and 4 are stopped on the floors adjacent to each other, the occupied section of the first car 2 It does not overlap with the occupied section of the second car 4.

  FIG. 8 is an explanatory diagram showing the setting state of the occupied section at the start of traveling of the cars 2 and 4 in the synchronous operation mode, and FIG. 9 is an explanatory diagram showing the setting state of the occupied section during the traveling of the cars 2 and 4 in the independent operation mode. It is. The safety control devices 16 and 17 set a range in which an emergency stop is possible without collision between the vertically adjacent cars 2 and 4 as the occupation section in the synchronous operation safety standard. Therefore, the range of the occupied section in the synchronous driving safety standard is set smaller than the range of the occupied section in the independent driving safety standard.

  Further, in the synchronous operation mode, the elevator control device 12 starts traveling at predetermined time intervals in order from the cars 2 and 4 located on the leading side in the traveling direction. For example, in FIG. 9, since the cars 2 and 4 travel upward, the first car 2 starts traveling a predetermined time after the second car 4 located on the upper side starts traveling. On the contrary, when traveling downward, the first car 2 starts traveling first.

  The safety control devices 16 and 17 are arranged so as to avoid at least one of the absolute speed and the relative speed of the cars 2 and 4 in order to avoid collision between the cars 2 and 4 adjacent to each other while the cars 2 and 4 are traveling in the independent operation mode. When the cars 2 and 4 come closer to each other below the independent driving safety distance, the command to stop the cars 2 and 4 is issued.

  However, by installing the shock absorbers 10 and 11 in the cars 2 and 4, if the absolute speed and relative speed of the cars 2 and 4 are below the specified values, the cars 2 and 4 approach each other below the independent driving safety distance. It is possible to do.

  The safety control devices 16 and 17 are arranged so as to avoid at least one of the absolute speed and the relative speed of the cars 2 and 4 in order to avoid collision between the cars 2 and 4 adjacent to each other during the running of the cars 2 and 4 in the synchronous operation mode. When the critical speed specified from the above is exceeded, a command to brake the cars 2 and 4 is issued almost synchronously.

  In such an elevator apparatus, the operation mode of the elevator control device 12 includes an independent operation mode and a synchronous operation mode, and the independent operation safety standard and the synchronous operation safety are determined according to switching of the operation mode of the elevator control device 12. Since the presence or absence of an abnormality is determined by switching the reference, a mechanism for mechanically connecting the cars 2 and 4 and a mechanism for adjusting the distance between the upper and lower cars 2 and 4 are not used. A similar synchronous operation mode can cope with a shuttle operation in which large-capacity transportation is performed at one time, and an independent operation mode can improve freedom of operation and increase operation efficiency.

Embodiment 2. FIG.
Next, FIG. 10 is a block diagram showing a multi-car type elevator apparatus according to Embodiment 2 of the present invention. The operation mode of the elevator control device 12 (omitted in FIG. 10) includes a degenerate operation mode in addition to the independent operation mode and the synchronous operation mode. In the degenerate operation mode, one of the cars 2 and 4 is stopped and only the other is operated in response to the call. In FIG. 10, the first car 2 is stopped in the waiting space in the hoistway 1, and only the second car 4 is operated.

  When the operation of the first car 2 is suspended in the degenerate operation mode, the lower end portion in the hoistway 1 is set as a save space. In addition, when the operation of the second car 4 is suspended in the degenerate operation mode, the upper end portion in the hoistway 1 is set as a save space.

  A buffer device 18 for the save space is installed at the upper portion of the save space. The buffer device 18 for the escape space is fixed to the hoistway wall. The second car 4 is provided with a shock absorber abutting portion 19 that abuts against the shock absorber 18 for the save space. When the second car 4 moves downward from the lowermost floor due to some abnormality, the shock absorber abutting portion 19 abuts on the buffer space 18 for the save space, and the second car 4 enters the save space. Intrusion is prevented. Other configurations and operation methods are the same as those in the first embodiment.

  In such an elevator apparatus, since the degenerate operation mode is included in the operation mode, a single operation with only one car 4 can be performed when passengers are quiet, and energy saving can be improved.

Note that the first and second drive control devices 13 and 14 may be combined into one device.
Further, the drive control devices 13 and 14 and the operation control device 15 may be combined into one device.
Further, the first and second safety control devices 16 and 17 may be combined into one device.

Furthermore, the roping method is not limited to the 1: 1 roping method, and may be a 2: 1 roping method, for example.
Different roping methods may be mixed depending on the car.

  Furthermore, although the two cars 2 and 4 are used in the above example, three or more cars may be arranged in the common hoistway 1. In this case, the car may be divided into a plurality of groups, and each group may be independently operated while the cars in the group are operated synchronously. Further, two or more cars may be paused in the degenerate operation mode.

Furthermore, the method for setting the occupied section is not limited to the above example. For example, the occupied section set at the start of traveling in the independent operation mode may be maintained without changing until the cars 2 and 4 arrive at the destination floor. Good. In the independent operation mode, the entire occupied section may move as the cars 2 and 4 travel. When the occupied sections are changed as the cars 2 and 4 travel, it is also possible to generate a speed pattern so that the occupied sections do not overlap in consideration of the time change of the occupied sections. For example, taking into account that the occupied section of the traveling car is released after a predetermined time, delaying the start time of the subsequent car or lowering the traveling speed may cause the interference of the occupied section in terms of time. By avoiding this, it is possible to allow the subsequent car to travel.
In addition, the occupied section does not necessarily have to be extended below the lowest car. Similarly, the occupation section does not necessarily have to be extended above the uppermost car.

  DESCRIPTION OF SYMBOLS 1 Hoistway, 2 1st car, 4 2nd car, 6 1st drive device, 7 2nd drive device, 12 Elevator control device, 16 1st safety control device, 17 2nd safety control device .

Claims (7)

A plurality of cars provided in a common hoistway;
A plurality of driving devices for independently raising and lowering the car;
An elevator control device that controls the operation of the car by controlling the drive device, and monitors the state of the car based on information on the position and speed of the car and makes the car safe when an abnormality is detected. Equipped with a safety control device
The operation modes of the elevator control device include an independent operation mode in which the cars are independently driven, and a synchronous operation mode in which the cars are integrally driven in a state of being close to each other,
In the safety control device, an independent operation safety standard corresponding to the independent operation mode and a synchronous operation safety standard corresponding to the synchronous operation mode are set,
The said safety control apparatus switches the said independent driving | operation safety standard and the said synchronous driving | operation safety standard according to switching of the operation mode of the said elevator control apparatus, and judges the presence or absence of abnormality.   The safety control device sets different occupied sections for the car traveling in response to a call according to the independent driving safety standard and the synchronous driving safety standard, and the occupied sections overlap each other during the traveling of the car. The elevator apparatus according to claim 1, wherein the elevator apparatus monitors whether or not it is necessary.   The elevator apparatus according to claim 2, wherein a range of the occupied section in the synchronous driving safety standard is set to be smaller than a range of the occupied section in the independent driving safety standard.   The said safety control apparatus prohibits the said driving | running | working of the said cage that the said occupation sections overlap with respect to the said elevator control apparatus as the said independent driving | operation safety standard. Elevator device.   The said safety control apparatus sets the area from the present position of the said car to the destination floor as the said occupation area in the said independent driving safety standard, The any one of Claim 2 to 4 characterized by the above-mentioned. The elevator apparatus as described.   The said safety control apparatus sets the range which can carry out an emergency stop, without the said cars adjoining up and down colliding as the said occupation area in the said synchronous driving | operation safety standard. The elevator apparatus of any one of these.   The elevator control device according to any one of claims 1 to 6, wherein in the synchronous operation mode, the elevator starts traveling at predetermined time intervals in order from the car positioned on the leading side in the traveling direction. The elevator apparatus as described in the item.

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