JP6641308B2 - Elevator - Google Patents

Description

  The present invention relates to an elevator for controlling the elevation of a car that moves up and down in a hoistway.

  In order to safely raise and lower the elevator car, it is important to grasp accurate position information. For example, if the elevator stops in an express zone set in an area where there is no door on the hoistway, it is necessary to perform low-speed traveling to the door zone with doors to establish position data before traveling again at high speed, At low speeds, it takes a lot of time to rescue the passengers.

  In order to solve such a problem, Patent Literature 1 discloses a control device that raises and lowers a car at a first speed after an emergency stop of the car, and a safety controller that creates position information of the car using a governor encoder. Is disclosed. Then, in the elevator described in Patent Document 1, the control device determines the position of the car based on the elevator position transmitted from the safety controller, and when there is no car in the door zone, the car is set at a speed lower than the first speed. Get on and off at a fast second speed.

JP-A-2006-69133

  By the way, when the car stops in an emergency due to power cutoff, the main rope wrapped around the sheave slips and the sheave idles, and the absolute position of the car in the hoistway shifts (absolute position information error occurs). There is. For example, there is a case where an emergency stop command is issued to the third floor while the car is descending, but the vehicle actually stops at the second floor. When the car is emergency-stopped in this way, it is necessary for the elevator to acquire accurate absolute position information because there is a possibility that the elevator has lost accurate car absolute position information. For example, if the car is accelerated and runs when the car is stopped near the lowest floor, the car may collide with a shock absorber installed at the bottom of the hoistway. Therefore, after the power is restored, the car is driven at a low speed toward the end floor (generally, the lowest floor) to acquire the absolute position information.

  Patent Literature 1 describes a means for increasing the speed of a car after the car has stopped in an emergency zone in an emergency zone. However, there is no description of a means for increasing the speed at which the elevator car that has lost or may have lost the absolute position information travels to the end floor.

  The present invention has been made in view of the above situation, and has as its object to safely and quickly arrive at an end floor of an elevator car that has lost absolute position information.

An elevator according to one embodiment of the present invention includes a signal generator that outputs a signal according to the rotation of a rotating body that rotates in accordance with the rise and fall of a car and a car that moves up and down the hoistway, and at least one or more disposed in the hoistway. A position detection device installed on the car that detects the position detection member that has been set, and an end floor detection device that detects that the car has passed a predetermined position between the end floor of the hoistway and its adjacent floor Calculating the absolute position of the car in the hoistway based on the detection result of the position detecting device and the signal output from the signal generator by the position calculating function, and controlling the speed of the car when ascending and descending based on the absolute position. An elevator control device.
When the elevator control device returns from the position calculation impossible state in which the absolute position cannot be calculated to the position calculation possible state in which the absolute position can be calculated, when the car is moved to the end floor, Calculate the travel distance of the car after the start of movement, and if the travel distance exceeds the set distance value, increase the speed of the car, and use the end-floor detection device to move the car to a predetermined position near the end floor. When the speed of the car at the time of passing the position exceeds the speed set value, control is performed to forcibly decelerate the car to a speed set value or less.

ADVANTAGE OF THE INVENTION According to at least one aspect of this invention, the elevator car which may have lost the absolute position information can safely and promptly arrive at the end floor.
Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

It is a schematic diagram showing the whole example of composition of the elevator concerning one embodiment of the present invention. It is explanatory drawing which shows the example of arrangement | positioning of the shielding board for position detection which concerns on one Embodiment of this invention, and a position detection apparatus, and the shielding board for end story detection, and an end story detection apparatus. FIG. 2 is a block diagram illustrating a hardware configuration example of a computer included in the elevator device of FIG. 1. FIG. 2 is a block diagram illustrating a functional configuration example of the elevator control device of FIG. 1. It is a figure showing the example of the running speed curve of the elevator concerning one embodiment of the present invention. It is a flowchart which shows the position detector failure detection processing which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each of the drawings, components having substantially the same function or configuration are denoted by the same reference numerals, and redundant description will be omitted.

<1. One Embodiment>
FIG. 1 is a schematic diagram showing an example of the overall configuration of an elevator according to an embodiment of the present invention. Although the configuration of the elevator 100 shown in FIG. 1 is general, the elevator to which the present invention is applied is not limited to this example. Hereinafter, the configuration of the elevator 100 will be briefly described.

  The elevator 100 includes a control panel 2, a motor 4, and a car 8 connected to a counterweight 9 via a main rope 7. The elevator 100 controls the electric power supplied from the three-phase AC power supply 1 by the elevator control device 3 in the control panel 2, supplies the electric power to the motor 4, and drives the motor 4. The driving force supplied from the sheave 5 (the hoisting machine) connected to the drive shaft of the motor 4 via the main rope 7 causes the car 8 and the counterweight 9 to move up and down in the hoistway 101.

  A motor rotary encoder 6 (an example of a signal generator) that outputs a pulse signal according to the rotation of the rotary shaft is attached to the rotary shaft of the sheave 5. The rotation direction of the motor 4 and the position of the car 8 in the hoistway 101 are calculated from the pulse signal output from the motor rotary encoder 6. In FIG. 4 described later, the motor rotary encoder is described as “motor RE”.

  A governor rope 12 is connected to the car 8, and the governor rope 12 is hung on a governor pulley 13. The governor rope 12 connected to the car 8 moves in synchronization with the elevation of the car 8 and rotates the governor pulley 13. A governor rotary encoder 14 (an example of a signal generator) that outputs a pulse signal according to the rotation of the rotating shaft is attached to the rotating shaft of the governor pulley 13. The position, speed, and the like of the car 8 are calculated from the pulse signal (the rotation amount of the governor pulley 13) output from the governor rotary encoder 14. In FIG. 4 described later, the rotary encoder is described as “rotary RE”.

  By detecting the shielding plates 11U, 11M, 11L (see FIG. 2) installed on the top floor, the bottom floor, and the middle floor in the hoistway 101, the car 8 is placed on the corresponding floor. A position detection device 10A that detects the presence or passage of the vehicle is attached. The shielding plates 11U and 11L are arranged so as to be detected before the car 8 arrives at the end floor. When the shielding plates 11U, 11M, and 11L are not distinguished, they are referred to as “shielding plates 11”. The shielding plate 11 is an example of a position detecting member. The position detection device 10A is provided above the car 8 and emits light to detect reflected light from the shielding plate 11. The position detection device 10A outputs an output signal corresponding to the detection result of the shielding plate 11 to the elevator control device 3. An output signal corresponding to the detection result of the shield plate 11 is output to the elevator control device 3.

  In addition, by detecting the shielding plates 15U and 15L (see FIG. 2) installed at predetermined positions near the uppermost floor and the lowermost floor in the hoistway 101, the car 8 is placed near the end floor. An end floor detecting device 10B for detecting the presence or passing of the vehicle at a predetermined position is attached. When the shielding plates 15U and 15L are not distinguished, they are described as “shielding plate 15”. The shielding plate 15 is an example of an end floor detecting member. The end floor detection device 10B is also provided above the car 8 and emits light to detect reflected light from the shielding plate 15. The end floor detection device 10B outputs an output signal corresponding to the detection result of the shielding plate 15 to the elevator control device 3.

  Further, a shock absorber 16 is provided at the lowermost portion of the hoistway 101 to reduce the impact of the car 8 colliding with the lowermost portion of the hoistway 101.

[Description of absolute position detection and end floor detection]
FIG. 2 is an explanatory diagram showing an example of the arrangement of the shielding plate 11 and the position detecting device 10A, and the arrangement of the shielding plate 15 and the end story detecting device 10B.

  The shielding plate 11 for position detection is generally arranged along the vertical direction of the hoistway 101 so as to correspond to a door zone in which door opening / closing of each floor (a landing) is permitted. 11M on the top floor, 11M,..., 11M on the middle floor, and 11L on the lowest floor have different lengths and / or shapes. These shielding plates 11U, 11M, and 11L are detected by the position detection device 10A that moves on the shielding plates 11U, 11M, and 11L. When the car 10A moves and the position detecting device 10A is at a position facing the shielding plate 11, the position detecting device 10A detects the reflected light from the shielding plate 11. By changing the length and shape of each shielding plate 11 for each floor, it is detected that the car 8 is at a predetermined reference position on that floor. Instead of detecting the reflected light from the shielding plate 11, another floor detecting member such as a bar code provided in the hoistway 101 may detect each floor by optical or other methods.

  The end-floor detection shielding plates 15 are arranged on a straight line different from the row of the shielding plates 11 along the vertical direction of the hoistway 101. The shielding plate 15L is installed between the shielding plate 11L corresponding to the lowest floor (FLn) and the adjacent floor (FLn + 1) (FIG. 1). The shielding plate 15U is installed between the shielding plate 11U corresponding to the top floor and the adjacent floor. The shielding plates 15U and 15L differ in length and / or shape. When the end floor detection device 10B is also located at a position facing the shielding plate 15, the reflected light from the shielding plate 15 is detected. Instead of detecting the reflected light from the shielding plate 15, another end position detecting member such as a bar code provided in the hoistway 101 may be optically or otherwise detected.

[Hardware configuration of elevator device]
FIG. 3 is a block diagram illustrating a hardware configuration example of a computer included in the elevator control device 3.

  The elevator control device 3 includes a CPU (Central Processing Unit) 21, a ROM (Read Only Memory) 22, and a RAM (Random Access Memory) 23 connected to a bus 24, respectively. Further, the elevator control device 3 includes a display unit 25, an operation unit 26, a nonvolatile storage 27, and a network interface 28.

  The CPU 21 reads out a program code of software for realizing each function according to the present embodiment from the ROM 22 and executes it. In the RAM 23, variables, parameters, and the like generated during the arithmetic processing are temporarily written.

  The computer of the elevator control device 3 can be configured by, in addition to the CPU, an arithmetic processing device having a microcontroller, a DSP, an electronic processing device capable of implementing processing logic by programming such as an FPGA (logic circuit), and the like. .

  The display unit 25 is, for example, a liquid crystal display monitor, and displays a result of a process performed by a computer. For example, a keyboard, a mouse, a touch panel, or the like is used as the operation unit 26, and a user can perform predetermined operation inputs and instructions.

  The non-volatile storage 27 may store a program for causing a computer to function, in addition to an OS (Operating System) and various parameters. Further, information such as a table and a file may be recorded in the nonvolatile storage 27. For example, in the nonvolatile storage 27, absolute position data is recorded. The absolute position corresponds to a distance from a reference position (the lowest floor in the present embodiment) in the hoistway 101. Examples of the nonvolatile storage 27 include a hard disk drive (HDD), a solid state drive (SSD), a flexible disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, and a nonvolatile memory card. Used.

  For example, an NIC (Network Interface Card) or the like is used as the network interface 28, and various data can be transmitted and received between devices via a network such as a LAN.

[Functional configuration of elevator control device]
Next, a detailed description will be given of a functional configuration for the car 8 that has lost (or possibly has lost) the absolute absolute position information to safely travel toward the lowest floor.

  FIG. 4 is a block diagram illustrating a functional configuration example of the elevator control device 3 of the control panel 2. When the CPU 21 executes the control program stored in the ROM 22 or the nonvolatile storage 27, the functions of the respective units shown in FIG. 4 are realized.

  The elevator control device 3 includes a position calculation unit 31, a speed calculation unit 32, a storage unit 33, a comparison unit 34, and a speed command unit 35, and outputs a speed command to an inverter 36 in the control panel 2. Then, the inverter 36 that converts the electric power supplied from the three-phase AC power supply 1 supplies electric power (drive signal) to the motor 4 based on the speed command received from the speed command unit 35, so that the car 8 Operation is controlled.

  The position calculation unit 31 calculates a position calculation value (absolute position) based on the position detection device 10A and the pulse count of the motor rotary encoder 6 and / or the governor rotary encoder 14. The position calculating unit 31 detects the current floor (current position) from the detection result of the shielding plate 11 of the position detecting device 10A, and converts the current position and a signal (pulse count number) output from any of the rotary encoders. Based on this, the absolute position of the car 8 in the hoistway 101 is calculated. In addition, the position calculation unit 31 returns from the position calculation disabled state in which the position calculation is impossible to the position calculation enabled state in which the position calculation is possible, and then starts moving toward the end floor. Is calculated (distance calculation value).

  The speed calculation unit 32 calculates the traveling speed (speed calculation value) of the car 8 when the car 8 is detected to be located on the end floor by the end floor detection device 10B (when the car 8 has passed). In the present embodiment, the lowermost floor is described as an example of the end floor, but the same applies to the case of the uppermost floor.

  The storage unit 33 stores a distance setting value for comparing with a movement distance of the car 8 from the start of movement to the lowest floor after the position calculation function returns to the position calculation enabled state, and an end floor detection of the car 8. The speed setting value for comparison with the speed calculation value at the time is stored. The speed setting value is a speed at which the car 8 can reliably stop at the lowest floor when the car 8 passes through the shielding plate 15L on the lowest floor side. The storage unit 33 stores a table in which absolute positions from the end floor (lowest floor) to each shielding plate 11 are registered as absolute position data. The storage unit 33 is the nonvolatile storage 27 or the ROM 22.

  The comparison unit 34 compares the calculated distance value of the car 8 calculated by the position calculation unit 31 with the set distance value stored in the storage unit 33. Further, the comparison unit 34 compares the speed calculation value of the car 8 calculated by the speed calculation unit 32 with the speed set value stored in the storage unit 33. The comparison unit 34 outputs these comparison results to the speed command unit 35.

  The speed command unit 35 controls to increase the speed of the car 8 when the calculated distance value of the car 8 exceeds the set distance value. Specifically, when the calculated distance value of the car 8 is equal to or less than the set distance value, the speed command unit 35 outputs a speed command of the speed limit A (first speed) to the inverter 36. The speed limit A is a speed at which the car 8 can reliably stop at the lowest floor after the car 8 has passed through the shielding plate 11L on the lowest floor. On the other hand, when the distance calculation value exceeds the distance set value, the speed command unit 35 outputs a speed command of the speed limit A and a speed limit B (second speed) higher than the speed set value to the inverter 36. I do. If the speed calculation value of the car 8 at the end floor detection exceeds the speed set value, a forced deceleration command is output to the inverter 36 to perform control to decelerate the car 8 to the speed set value or less. Do. The speed limit A is set to be equal to or less than the speed set value.

  As described above, the absolute position of the car 8 is grasped by the position calculation value calculated by the position calculation unit 31 based on the position detection device 10A and the pulse count number of the motor rotary encoder 6 and / or the governor rotary encoder 14. I have.

  When the power supply to the control panel 2 is cut off, the position calculation by the position calculation unit 31 cannot be performed, and the accurate absolute position cannot be grasped. Therefore, unless the position detection device 10A detects the shielding plates 11L and 11U (FIG. 2) on the top floor or the bottom floor FLn at the time of power restoration, the elevator control device 3 (CPU 21) determines that the absolute position information has been lost. Then, the traveling of the car 8 is started toward the lowest floor to grasp the absolute position.

  At this time, as a means for preventing the collision of the car 8 with the shock absorber 16 while increasing the speed of the car 8, the end floor detection device 10 </ b> B is used. The speed calculation unit 32 calculates the speed when the end floor detection device 10B detects that the car 8 has passed the predetermined position near the end floor, and the calculated speed value and the speed set value stored in the storage unit 33. Are compared by the comparing unit 34. Then, when the calculated speed value of the car 8 exceeds the set speed value, the speed command unit 35 issues a forced deceleration command to the inverter 36, and causes the car 8 to safely land on the lowest floor FLn.

  However, in some cases, the car 8 is stopped closer to the lowest floor than the end-floor detection shielding plate 15L, so that the two speed limits A and B are set to control the traveling speed. Here, the speed limit B is set faster than the speed limit A. Until the car 8 travels over a certain distance (that is, a set distance), the car 8 is run at the speed limit A, and after running over a certain distance, the speed of the car 8 is reduced to the speed limit B. Increase speed.

  Here, it is assumed that a running speed curve is calculated based on the absolute position of the car 8 immediately before power-off after the power is restored, and the running speed of the car 8 is increased according to the running speed curve.

  FIG. 5 shows an example of the traveling speed curve of the elevator. In the figure, the horizontal axis represents the traveling distance since the car 8 started traveling, and the vertical axis represents the speed of the car 8. As shown in FIG. 5, the speed of the car 8 is increased from the traveling start position to the speed limit A, and then increased to the speed limit B beyond the speed set value. When the car 8 approaches the lowest floor, which is the landing position, the speed is reduced.

  At this time, as shown in FIG. 5, the speed of the car 8 at the end floor detection position (when the car 8 has passed through the shielding plate 15L by the end floor detection device 10B) is safely changed to the lowest floor. It is calculated to be smaller than the speed setting value at which landing is possible. However, if the absolute position is deviated immediately before the power is cut off and after the power is restored, the speed of the car 8 is increased even though the end floor is near, and the speed at the time of passing may be higher than expected. Can be

  Therefore, the distance calculation value calculated by the position calculation unit 31 and the distance setting value stored in the storage unit 33 are compared by the comparison unit 34, and the speed of the car 8 is limited based on the comparison result. That is, when the traveling distance of the car 8 is equal to or less than the set distance value, the car 8 is controlled so as not to increase in speed, so that the car 8 can safely land on the lowest floor FLn. Can be.

  As the information corresponding to the distance, the number of shielding plates 11 (for example, two or more) detected by the position detection device 10A, or the pulse count of the motor rotary encoder 6 or the governor rotary encoder 14 may be used. The method of determining whether or not the vehicle has traveled a certain distance by comparing the detected number of the shielding plates 11 with the number preset in the storage unit 33 reduces the processing load as compared with the case where the pulse count number is used. . Note that, by registering the distance between the shielding plates 11 in the storage unit 33 in advance, the traveling distance of the car may be calculated from the detected number of the shielding plates 11.

[Elevator operation]
FIG. 6 is a flowchart illustrating an operation example of the elevator control device 3. The flow chart shown in FIG. 6 is realized by the CPU 21 reading and executing the control program recorded in the ROM 22 or the nonvolatile storage 27. In the following, it is assumed that the power of the control panel 2 is cut off and the position calculation unit 31 is in a position calculation disabled state.

  The elevator control device 3 (CPU 21) determines whether or not power has been restored, that is, whether or not it has recovered from the position calculation disabled state (S1). If power has not been restored (NO in S1), a series of steps in the flowchart are performed. The process ends.

  On the other hand, when the power is restored (YES in S1), the elevator control device 3 determines whether the position detection device 10A has detected the shielding plates 11U and 11L on the end floor (the top floor or the bottom floor). A judgment is made (S2). Here, when the position detecting device 10A detects the shielding plates 11U and 11L on the end floor (YES in S2), the elevator control device 3 determines that the car 8 is stopped on the end floor, The control device 3 reads the absolute position data from the storage unit 33 and returns the elevator 100 to normal (S11).

  If the position detecting device 10A has not detected the end floor shielding plate 11L (NO in S2), the elevator control device 3 determines that the absolute position information has been lost, and The traveling of the car 8 is started at the speed limit A toward (S3).

  Next, the elevator control device 3 determines whether or not the end floor detection device 10B has detected the end floor detection shield plate 15L installed near the lowest floor (S4). Here, when the elevator control device 3 determines that the shield plate 15L has been detected (YES in S4), the process proceeds to the determination process in step S8.

  On the other hand, when the shielding plate 15L is not detected in step S4 (NO in S4), the elevator control device 3 determines whether the car 8 has traveled a certain distance, that is, a distance exceeding the distance set value. (S5). Specifically, the elevator control device 3 calculates the traveling distance from the start of the traveling of the car 8 by the position calculating unit 31, and compares the calculated distance with the distance set value of the storage unit 33 by the comparing unit 34. Compare.

  If the car 8 has traveled a distance exceeding the distance set value (YES in S5), the elevator control device 3 increases the speed of the car 8 to the speed limit B by the speed command unit 35 (S6). It returns to the determination processing of step S4.

  On the other hand, when the travel distance of the car 8 is equal to or less than the set distance value (NO in S5), the elevator control device 3 determines whether the position detection device 10A has detected the lowermost floor shield plate 11L. (S7). Here, when the lowermost floor shielding plate 11L is not detected (NO in S7), the elevator control device 3 returns to the determination processing in step S4. When the lowermost shielding plate 11L is detected (YES in S7), the elevator control device 3 proceeds to the processing in step S10.

  Next, when the shielding plate 15L for detecting the end floor is detected (YES in S4), the elevator control device 3 calculates the speed of the car 8 at the time of detecting the shielding plate 15L on the lowest floor by the speed calculation unit. 32. Then, the elevator control device 3 compares the calculated speed value of the car 8 with the set speed value of the storage unit 33 by the comparing unit 34 (S8).

  When the calculated speed value of the car 8 is larger than the set speed value (YES in S8), the elevator control device 3 outputs a forced deceleration command to the inverter 36 by the speed command unit 35, and causes the car 8 to operate. Control for landing on the lowest floor is performed (S9).

  On the other hand, when the calculated speed value of the car 8 is equal to or smaller than the set speed value (NO in S8) or in the case of YES in step S7, the elevator control device 3 uses the speed command unit 35 as shown in FIG. A speed command is output in accordance with the traveling speed curve, and control is performed so that the car 8 normally land on the lowest floor (S10).

  After the processing in step S9 or S10 is completed, since the car 8 is stopped on the lowest floor, the elevator control device 3 reads the absolute position data from the storage unit 33 and returns the elevator 100 to normal (S11). .

  According to the above-described embodiment, when the stopped car 8 is moved to the lowest floor after power recovery, the moving distance of the car 8 after the start of the movement is calculated, and the moving distance is set as the distance setting. If it exceeds the value, the speed of the car 8 is increased. If the speed of the car 8 when the car 8 has passed the predetermined position near the lowest floor exceeds the speed set value by the end floor detection device 10B, the car 8 is set to the speed set value or less. Control for forced deceleration.

  That is, when the car 8 is not stopped near the lowermost end, the car 8 is accelerated to the speed limit B higher than the set speed, and the car 8 travels immediately to the lowest floor. Can be. Also, if the speed of the car 8 at the time of passing the predetermined position near the end floor exceeds the speed setting value, by issuing a forced deceleration command, even if an error occurs in the absolute position information, The car 8 can safely arrive at the lowest floor.

  In addition, when the car 8 is stopped near the lowermost end, by not increasing the speed of the car 8, the situation where the car 8 cannot be stopped at the lowest floor is avoided, and the car 8 can be safely stopped. You can arrive at the lowest floor. Thereby, even when an error occurs in the absolute position information, the car 8 can safely arrive at the lowest floor. In this case, the traveling distance to the lowest floor of the car 8 is short because the traveling distance to the lowest floor is short, and the disadvantage of not increasing the speed is extremely small.

  As described above, according to the present embodiment, the car 8 of the elevator 100, which may have lost the absolute position information due to power cutoff or the like, can safely and promptly arrive at the lowest floor. Thereby, it is possible to prevent the car 8, which may have lost the absolute position information, from colliding with the shock absorber 16.

  In the present embodiment, the car 8 is made to travel to the lowest floor after the power is restored. However, the car 8 may be made to travel to the top floor to acquire the absolute position information again. is there.

  In the case where the calculation of the absolute position by the position calculation unit 31 becomes impossible, in addition to the power shutoff, when the memory such as the CPU 21, the ROM 22, and the RAM 23 fails, an output signal is obtained from each rotary encoder due to the failure of each rotary encoder. There may be no case. The elevator control device 3 includes a watchdog timer for detecting an abnormality of the CPU 21 and a circuit for monitoring a power supply abnormality. Further, in order to detect a processing abnormality of the CPU 21 and the memory, the CPU 21 and the memory may be duplicated to enable mutual comparison.

<2. Others>
Further, the present invention is not limited to the above-described embodiments, but may take various other applied examples and modified examples without departing from the gist of the present invention described in the claims. is there.

  For example, in the above-described embodiment, the configurations of the apparatus and the system are described in detail and specifically in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described above. . Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is also possible to add, delete, or replace another configuration with respect to a part of the configuration of each embodiment.

  Further, the governor rotary encoder 14 may be a method of attaching to the shaft of the governor pulley 13 or a method of pressing against the governor pulley 13. In addition, the elevator 100 according to one embodiment illustrates a 1: 1 roping elevator for clarity of description, but the elevator 100 can be applied to a 2: 1 roping elevator.

  Further, the end floor detection device may be configured using a mechanical switch such as a cam switch (limit switch). In this case, an end-floor detection device using a mechanical switch is provided in the vicinity of the lowest floor and the top floor, and by detecting contact of a position detecting member such as a protrusion provided on the car 8, the car 8 is moved to the end. It detects that it is near the floor.

  In addition, each of the above configurations, functions, processing units, and the like may be partially or entirely realized by hardware, for example, by designing an integrated circuit.

  In addition, control lines and information lines are shown as necessary for the description, and do not necessarily indicate all control lines and information lines on a product. In fact, it can be considered that almost all components are interconnected.

  Further, in this specification, processing steps describing time-series processing include, in addition to processing performed in a time-series manner in the order described, parallel or individual processing even if not necessarily performed in a time-series manner. (For example, parallel processing or processing by an object).

  1: three-phase AC power supply, 2: control panel, 3: elevator control unit, 4: motor, 5: sheave, 6: motor rotary encoder, 7: main rope, 8: car, 9: counterweight, 10A: position Detection device, 10B: End floor detection device, 11L, 11M, 11U: Shielding plate, 12: Governor rope, 13: Governor pulley, 14: Governor rotary encoder, 15L, 15U: Shielding plate, 16: Shock absorber, 21: CPU, 27 ... Non-volatile storage, 31 ... Position calculation unit, 32 ... Speed calculation unit, 33 ... Storage unit, 34 ... Comparison unit, 35 ... Speed command unit, 36 ... Inverter, 100 ... Elevator, 101 ...

Claims (8)

Riding cars going up and down the hoistway,
A signal generator that outputs a signal according to the rotation of the rotating body that rotates in accordance with the elevation of the car,
A position detection device installed on the car, which detects a position detection member disposed at least one or more in the hoistway;
An end floor detection device that detects that the car has passed a predetermined position between the end floor of the hoistway and the adjacent floor,
A position calculation function calculates an absolute position of the car in the hoistway based on a detection result of the position detection device and a signal output from the signal generator, and calculates the absolute position of the car based on the absolute position. An elevator control device for controlling the speed of the vehicle,
The elevator control device returns the car to the end floor after returning from the position calculation impossible state in which the absolute position calculation is impossible to the position calculation possible state in which the absolute position calculation is possible. When moving, calculate the moving distance of the car after the start of movement, if the moving distance exceeds the distance set value, increase the speed of the car, the end floor detection device said An elevator for performing control to forcibly decelerate the car to a speed equal to or lower than the speed set value when the speed of the car exceeds a set speed value when the car passes a predetermined position near the end floor. The speed set value is a speed at which the car can stop at an end floor,
The elevator control device, after returning from the position calculation impossible state to the position calculation possible state, moves the car that has started moving toward the end floor at a first speed equal to or lower than the speed set value, The elevator according to claim 1, wherein the speed of the car is increased to a second speed greater than the speed set value when the moving distance of the car exceeds the distance set value. A storage unit for storing information on the absolute position of the car,
The elevator control device calculates the speed of the car based on the absolute position of the car stored in the storage unit immediately before the position calculation is disabled after returning to the position calculation enabled state. The elevator according to claim 1. The elevator according to claim 1, wherein the elevator control device calculates a moving distance of the car based on the number of the position detection members detected by the position detection device. The elevator according to claim 1, wherein the elevator control device calculates a moving distance of the car based on a number of pulses included in a signal output by the signal generator in accordance with rotation of a motor that drives the car. . The said elevator control apparatus calculates the moving distance of the said car based on the number of pulses contained in the signal which the signal generator output according to the rotation of the governor pulley connected with the said car. Elevator. The elevator according to claim 1, further comprising a shock absorber provided at a lowermost portion of the hoistway and configured to reduce an impact when the car collides. The elevator according to any one of claims 1 to 7, wherein the end floor is a lowest floor.

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