JP2012232819A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine presence/no presence of a worker on a car on the basis of the load applied to a rope hitch.SOLUTION: An elevator includes: a car disposed in an elevating and lowering path; a rope hitch load detection device detecting the load applied to a rope hitch part to which one end of a main rope that supports the car is fixed and outputting the detected load by the load signal; a car floor load detection device detecting the load applied to the floor of the car and outputting the detected load by the load signal; and an elevator control device controlling the drive of the hoist according to the load signal of the rope hitch load detection device and the load signal of the car floor load detection device, and controlling the travel of the car. The elevator control device calculates the weight on the car and the weight in the car from the load signal of the rope hitch load detection device, calculates the weight in the car from the load signal of the car floor load detection device, and when a difference between the weight on the car and the weight in the car calculated based the load signal of the rope hitch load detection device and the weight in the car calculated based on the load signal of the car floor load detection device is more than a threshold, keeps the car in a stopped state.

Description

  The present invention relates to an elevator that determines the presence or absence of an operator on a car based on a load applied to a rope hitch.

  Conventionally, some elevators are provided with detection means for detecting whether there is a person in the car.

JP-A-6-1555

  Here, during maintenance inspection, an operator may get on the car with the elevator car stopped. Thus, in a state where the worker is on the car, it is preferable to stop the car for safety. However, this detection means can detect whether or not there is a person in the car, but cannot detect the presence or absence of an operator on the car at the time of maintenance and inspection. For this reason, in judging only whether there is a person in the car, there is a risk that after switching to normal driving, the car may run even if the worker is still on the car. Therefore, an object of the embodiment of the present invention is to provide an elevator that normally travels a car after determining that there is no worker on the car.

  The elevator of the embodiment detects a load applied to a rope hitch portion to which one end of a main rope supporting the car is fixed, and a detected load is output as a load signal. A rope hitch load detection device, a car floor load detection device that detects a load applied to the car floor of the car and outputs the detected load as a load signal, a load signal of the rope hitch load detection device, and the car floor load An elevator control device that controls driving of the hoisting machine based on a load signal of the detection device and controls the traveling of the car, and the elevator control device includes a load of the rope hitch load detection device. The weight on the car and the weight in the car are calculated from the signal, the weight in the car is calculated from the load signal of the car floor load detection device, and the robot The weight on the car calculated based on the load signal of the pitcher load detector and the difference between the weight in the car and the weight in the car calculated based on the load signal of the car floor load detector Is equal to or greater than the threshold, the car is in a stopped state.

FIG. 1 is a diagram schematically illustrating the structure of the elevator according to the first embodiment. FIG. 2 is a configuration diagram of a car floor periphery of the elevator according to the first embodiment. FIG. 3 is a block diagram illustrating a configuration of an elevator control function according to the first embodiment. FIG. 4 is a flowchart illustrating an example of control in the elevator system according to the first embodiment. FIG. 5 is a diagram schematically illustrating the structure of the elevator according to the second embodiment. FIG. 6 is a block diagram illustrating a configuration of an elevator control function according to the second embodiment. FIG. 7 is a flowchart illustrating an example of control in the elevator system according to the second embodiment.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range.

[Embodiment 1]
FIG. 1 is a diagram schematically illustrating the structure of the elevator according to the first embodiment. As shown in FIG. 1, an elevator 1 includes a car 3 that moves up and down in a hoistway 2, a main rope 4, a hoisting machine 5, a counterweight 6, a tail cord 7, a compensation chain 8, and a rope A hitch load detection device 10, a car floor load detection device 12, and an elevator control device 20 are included. FIG. 1 shows a state where the worker H1 is in the car 3 and the worker H2 is on the car 3.

  The hoistway 2 is provided along the vertical direction of the building. A passenger car 3 for carrying a user or a baggage is arranged in a hoistway 2 so as to be lifted and lowered. The main rope 4 is wound around the hoisting machine 5, and the car 3 and the counterweight 6 connected to the main rope 4 are moved up and down in the opposite direction by driving the hoisting machine 5. Both ends of the main rope 4 are supported by the upper end of the hoistway 2. The hoisting machine 5 includes a sheave around which the main rope 4 is wound and an electric motor that rotates the sheave. That is, the hoisting machine 5 winds up the main rope 4 by rotating the sheave with the electric motor. The hoisting machine 5 is arranged above the upper end of the moving area of the car 3. The elevator 1 can raise and lower the car 3 and the counterweight 6 in directions opposite to each other by rotating the sheave by driving the hoisting machine 5.

  The tail cord 7 is a cord in which power lines and transmission lines are combined, and connects the electronic components inside the car 3 and the elevator control device 20. The compensator chain 8 connects the car 3 and the counterweight 6 to suppress vibration of the car 3.

  The rope hitch load detection device 10 is disposed at one end of the main rope 4 and measures a load related to the rope hitch of the main rope 4. The car floor load detection device 12 is arranged on the floor of the car 3, that is, the car floor, and measures the load applied to the car floor of the car 3. The rope hitch load detection device 10 sends the measured load of the rope hitch to the elevator control device 20 as a load signal. Moreover, although mentioned later for details, the load concerning the car floor measured by the car floor load detection apparatus 12 is also sent to the elevator control apparatus 20 as a load signal.

  Hereinafter, the arrangement position of the car floor load detection device 12 will be described with reference to FIG. FIG. 2 is a configuration diagram of a car floor periphery of the elevator according to the first embodiment. As shown in FIG. 2, the bottom of the car 3 includes a car floor receiving frame 16, a car lower beam 17 that supports and reinforces the car floor receiving frame 16, a vibration isolating rubber 18, and a car floor 19. The car floor receiving frame 16 is a bottom surface connected to the other surface of the car 3. The car lower beam 17 is a bar-shaped member that passes through the center of the bottom surface of the car 3 and is parallel to an arbitrary side. The car lower beam 17 is connected to the car floor receiving frame 16, and a part of the car lower beam 17 protrudes above the car floor receiving frame 16. Further, the anti-vibration rubber 18 is disposed at the end of the upper surface of the car floor receiving frame 16, that is, at a position away from the car lower beam 17. The car floor 19 is disposed on the upper surface of the car floor receiving frame 16, that is, inside the car 3. The central portion is supported by the car lower beam 17 and the end portion is supported by the vibration isolating rubber 18. The floor surface of the car 3 has such a configuration, and a part of the car 3 that is touched by the worker H <b> 1 is the car floor 19. Although not shown, the car 3 is also formed with a tail cord receiver that supports the tail cord 7 and a compensator chain receiver that is connected to the compensator chain 8 on the lower surface (outer surface) of the bottom surface.

  The car floor load detection device 12 is fixed to the car lower beam 17 and measures the load applied to the car floor 19. That is, since the end of the car floor 19 is supported by the elastic vibration isolating rubber 18, for example, when the operator H1 gets on the car floor 19, a load is applied to the car floor 19 and the vibration isolating rubber 18 bends. . On the other hand, the car lower beam 17 is substantially rigid because it is a rigid body. This causes a difference in deflection (deformation) between the car lower beam 17 and the vibration isolating rubber 18. The car floor 19 is displaced or deformed due to the difference in deflection. The car floor load detection device 12 calculates the load applied to the car floor 19 by measuring the load caused by the displacement or deformation generated in the car floor 19 or measuring the deformation and analyzing the measured value. ,taking measurement. The car floor load detection device 12 sends the measured load of the car floor 19 to the elevator control device 20 as a load signal.

  The elevator control device 20 is electrically connected to various parts of the elevator 1 such as various sensors such as the hoisting machine 5, the rope hitch load detection device 10 and the car floor load detection device 12, the car operation panel, the landing operation panel, and the like. To control. For example, the elevator controller 20 controls the driving of the hoisting machine 5 according to the operation input from the user to the car operation panel and the landing operation panel, and moves the car 3 to the destination floor corresponding to the call registration. Let Further, the elevator control device 20 controls the movement of the car 3 based on load signals from the rope hitch load detection device 10 and the car floor load detection device 12. This will be specifically described below.

  The control function of the elevator 1 will be described with reference to FIG. FIG. 3 is a block diagram illustrating a configuration of an elevator control function according to the first embodiment. As shown in FIG. 3, the elevator 1 includes a display device 22, an alarm device 24, a communication unit 26, in addition to the rope hitch load detection device 10, the car floor load detection device 12, and the elevator control device 20 described above. And an inspection operation changeover switch 28. Further, the elevator 1 communicates with the remote monitoring center 29 via the communication unit 26 to transmit and receive information. Since the rope hitch load detection device 10, the car floor load detection device 12, and the elevator control device 20 have been described above, description thereof will be omitted. In addition, the elevator 1 of this embodiment is provided with the various sensors and operation mechanism required in order to drive the elevator 1 other than each part shown in FIG. The elevator control device 20 is connected to each unit and controls the operation of each unit.

  The display device 22 is disposed inside the car 3 and is a device that displays an image based on an instruction from the elevator control device 20. The display device 22 displays, for example, information on the destination floor to be stopped, the driving state of the car 3, and the like. The alarm device 24 is a device that is arranged in the car 3 and notifies the alarm by sound. The communication unit 26 is a device that communicates with the remote monitoring center 29 and transmits and receives various kinds of information. Various communication methods can be used for the communication unit 26 to communicate with the remote monitoring center 29. Communication using a telephone line, communication using a wireless line, communication using a power line, or the like can be used. . The inspection operation changeover switch 28 is a switch that is operated by an operator to switch between the normal operation mode and the inspection operation mode. The inspection operation changeover switch 28 sends information on whether the operation mode is the normal operation mode or the inspection operation mode to the elevator control device 20. The normal operation mode is an operation mode that is selected when a user or a baggage is transported to the destination floor, that is, during normal use, and the inspection operation mode is selected when the worker inspects the elevator 1. It is an operation mode.

  The remote monitoring center 29 is installed at a position away from the elevator 1. The remote monitoring center 29 communicates with the communication unit 26 to acquire the state of the elevator 1 and monitors the state of the elevator 1. In the remote monitoring center 29, information sent from the elevator 1 is processed by a control device, an operator, or the like, and a worker of the elevator 1 is contacted.

  Next, the processing operation of the elevator 1 will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of control in the elevator system according to the first embodiment. In addition, the elevator 1 is implement | achieved when the elevator control apparatus 20 processes the information sent from each part, and performs control of each part. The elevator control device 20 repeats and executes the process shown in FIG.

  In step S12, the elevator control device 20 detects that the car 3 is stopped on any floor. That is, the elevator control device 20 detects that the car 3 is not moving. When the elevator control device 20 detects that the car 3 is stopped on any floor, it determines in step S14 whether the elevator is in the inspection operation mode, that is, in the inspection operation. The elevator control device 20 determines whether the operation mode is the normal operation mode or the inspection operation mode based on the information sent from the inspection operation changeover switch 28.

  When the elevator control device 20 determines that the inspection operation is being performed in step S14 (Yes), that is, the inspection operation changeover switch 28 is in the inspection operation mode, the car floor load detection device 12 and the rope hitch load detection device are determined as step S16. The load signal of 10 is invalidated and this processing is terminated.

  If the elevator control device 20 determines that the inspection operation is not in operation at step S14 (No), that is, if the inspection operation changeover switch 28 is in the normal operation mode, the load applied to the car floor 19 and the load applied to the rope hitch are determined as step S18. And measure. Specifically, the elevator control device 20 acquires the load signal of the car floor load detection device 12, measures the load applied to the car floor 19, acquires the load signal of the rope hitch load detection device 10, and sends it to the rope hitch. This load is measured.

  When the elevator control device 20 measures the load applied to the car floor 19 and the load applied to the rope hitch in step S18, the elevator controller 20 determines the number of passengers of the elevator 1 from the load applied to the car floor 19 and the load applied to the rope hitch in step S20. The weight of is calculated. That is, the elevator control device 20 processes the acquired load signal of the car floor load detection device 12 and rides on the weight of a person riding in the car 3, specifically on the car floor 19. The weight of the object is calculated as the weight of the passenger. Further, the elevator control device 20 processes the acquired load signal of the rope hitch load detection device 10 to determine the weight of the person riding in the car 3 and the person riding on the car 3, specifically, Calculates the weight obtained by subtracting the weight of the car 3 itself from the load detected by the rope hitch load detection device 10 as the weight for the number of passengers.

  After calculating the respective weights in step S20, the elevator controller 20 calculates the weight for the number of passengers calculated from the load applied to the car floor 19 and the weight for the number of passengers calculated from the load applied to the rope hitch in step S22. It is determined whether or not. The elevator control device 20 determines that they are equal if the difference between the loads is within a predetermined threshold, and determines that they are different if they are greater than the predetermined threshold. As the threshold value, it is preferable to use a weight that can be determined that there is a person, that is, a weight whose weight difference is a reference for one person.

  If the elevator controller 20 determines in step S22 that the weights of both are equal (Yes), the process proceeds to step S12. That is, when the weights of the two are equal, the elevator control device 20 determines that there is no worker on the car 3 and that there is no problem in normal operation, and proceeds to step S12 to repeat the above-described processing.

  If the elevator controller 20 determines in step S22 that the weights of the two are different (No), the elevator controller 20 prohibits the traveling of the car 3 in step S26. That is, when the weights of the two are different, the elevator control device 20 determines that there is a problem in normal driving because there is an operator on the car 3, and the car 3 is stopped (the movement of the car 3 is prohibited). ). Here, the elevator control device 20 detects the weight of only the object on the car floor 19 by detecting the weight of the passenger on the elevator 1 detected from the load applied to the car floor 19. Further, the elevator control device 20 detects the weight of the number of passengers of the elevator 1 from the load applied to the rope hitch, so that all the objects on the car 3 (the objects on the car 3 are also included). The weight of all the objects that have not been on the car 3 included, that is, the object that is on the car 3 and the object that is in the car 3 are detected. When the worker H2 is on the car 3 as shown in FIG. 1 during normal operation, there are workers who are not on the car floor 19, so the weights of the two are different. As described above, when the elevator control device 20 detects that an object having a constant load other than the car floor 19 is on the vehicle, the elevator control device 20 prohibits the car 3 from traveling.

  When the elevator control device 20 prohibits the traveling of the car 3 in step S26, the elevator control device 20 displays that the car 3 is not traveling on the display device 22 in step S28, and the alarm device 24 displays the car 3 in step S30. Is output (as an alarm), and at step S32, the remote monitoring center 29 is notified that the car 3 is not traveling. The elevator control device 20 can realize notification to the remote monitoring center 29 by performing communication with the communication unit 26. The elevator control device 20 ends the process after performing the process of step S32.

  The elevator 1 detects the car floor load and the rope hitch load in this way, and can detect whether a person is on the car 3 other than the car floor 19 by comparing the loads. In addition, when it is detected whether a person is on the car floor 19 other than the car floor 19, the car 3 is stopped in a state where a person is on the car 3 other than the car floor 19 by stopping the car 3. 3 can be prevented from moving. Thereby, the elevator 1 can be drive | operated more safely.

  In addition, when the elevator 1 stops traveling, the elevator 3 displays on the display device 22 that the passenger car 3 is in a stopped state, so that the operator (user) in the passenger car 3 can see the passenger car. It is possible to notify that the travel of 3 is prohibited. In addition, when the elevator 1 stops traveling of the car 3, the alarm device 24 outputs an alarm to notify a person around the elevator 1 that the traveling of the car 3 is prohibited. Can do. Further, when the elevator 1 stops traveling, the elevator 1 notifies the remote monitoring center 29 that the car 3 is in a stopped state by notifying the remote monitoring center 29 via the communication unit 26. 1 abnormality can be notified. Thereby, confirmation of the state of the said elevator 1 can be performed rapidly. Further, it is possible to notify the worker (user) in the car 3 from the remote monitoring center 29 that traveling of the car 3 is prohibited.

  Further, when the inspection operation changeover switch 28 is in the inspection operation, the elevator 1 can suitably execute the inspection by invalidating the load detection result. Moreover, it can suppress that a display, an alarm, and notification to the remote monitoring center 29 are performed at the time of inspection. As a result, it is possible to prevent an alarm or the like from being output when the user rides on the upper part of the car 3 or the like while appropriately switching to the inspection operation.

  In addition, the elevator control device 20 of the elevator 1 does not necessarily need to perform all the processes of steps S28, S30, and S32 after prohibiting the traveling of the car 3. For example, the elevator control device 20 can transmit that the traveling of the car 3 is stopped by performing at least one of the processes of steps S28, S30, and S32.

[Embodiment 2]
FIG. 5 is a diagram schematically illustrating the structure of the elevator according to the second embodiment. FIG. 6 is a block diagram illustrating a configuration of an elevator control function according to the second embodiment. The elevator according to the second embodiment is different from the first embodiment in that it includes a monitoring camera. In addition, about the structure, operation | movement, and effect which are common in embodiment mentioned above, the overlapping description is abbreviate | omitted as much as possible.

  As shown in FIG. 5, the elevator 30 includes a hoistway 2, a car 3, a main rope 4, a hoisting machine 5, a counterweight 6, a tail cord 7, a compensation chain 8, and a rope hitch load. A detection device 10, a car floor load detection device 12, an elevator control device 20, and a monitoring camera 32 are included. FIG. 5 also shows a state where the worker H1 is in the car 3 and the worker H2 is on the car 3. In addition to the rope hitch load detection device 10, the car floor load detection device 12, the elevator control device 20, and the monitoring camera 32, the elevator 30 includes a display device 22, as shown in FIG. 6. The alarm device 24, the communication unit 26, and the inspection operation changeover switch 28 are included. Since the configuration of the elevator 30 other than the monitoring camera 32 is the same as that of each part of the elevator 1, description thereof is omitted.

  The surveillance camera 32 is a photographing device that captures images inside the car 3. The surveillance camera 32 sends the captured video of the car 3 to the elevator control device 20.

  Next, the processing operation of the elevator 30 will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of control in the elevator system according to the second embodiment. Of the processes of the elevator 30 shown in FIG. 7, the same processes as those of the elevator 1 shown in FIG.

  In step S12, the elevator control device 20 detects that the car 3 is stopped on any floor. That is, the elevator 20 detects that the car 3 is not moving. If the elevator control device 20 detects that the car 3 is stopped on any one of the floors, the elevator control device 20 determines whether the elevator is under inspection as step S14. The elevator control device 20 makes a determination based on whether the inspection operation changeover switch 28 is in the normal operation mode or the inspection operation mode.

  If the elevator control device 20 determines that the inspection operation is being performed in step S14 (Yes), that is, if the inspection operation changeover switch 28 is in the inspection operation mode, the car floor load detection device 12 and the rope load detection device 10 are determined as step S16. The load signal is invalidated and this processing is terminated.

  If the elevator control device 20 determines that the inspection operation is not being performed in step S14 (No), that is, if the inspection operation changeover switch 28 is in the normal operation mode, the elevator control device 20 determines in step S40 whether the car floor load detection device 12 has failed. judge. The elevator control device 20 detects the load signal of the car floor load detection device 12 when a person is getting on and off the floor in the normal operation mode of the elevator 30, and the load changes according to the load signal. If the load is not changed by the load signal, it is determined that there is a failure. That is, when there is a change in the load applied to the car floor 19, the elevator control device 20 determines whether a failure has occurred due to a change in the detected load of the car floor load detection device 12. The elevator control device 20 may perform the above determination by moving the car 3 in the normal operation mode in step S40. However, the elevator control device 20 determines in advance whether or not there is a failure during the operation in the normal operation mode. The determination result may be used.

  If the elevator controller 20 determines in step S40 that the vehicle has failed (Yes), the load signal of the car floor load detector 12 is invalidated in step S42, and the car 3 is in any floor as step S44. In step S46, the car 3 is photographed by the surveillance camera 32 and the load applied to the rope hitch is measured. In addition, it measures with the rope hitch load detection apparatus 10, and calculates from a load signal.

  When the elevator controller 20 photographs the inside of the car 3 in step S46 and measures the load applied to the rope hitch, it determines in step S48 whether a person is reflected in the monitoring camera 32. That is, the elevator imaging device 20 analyzes an image captured by the monitoring camera 32 and determines whether a person can be extracted.

  If the elevator controller 20 determines in step S48 that a person is present (Yes), the elevator controller 20 proceeds to step S44. The elevator control device 20 repeats the processing from step S44 to step S48 until a state in which no person is shown in the monitoring camera 32 is detected.

  If it is determined in step S48 that no person is present (No), the elevator controller 20 determines whether the number of passengers calculated from the load signal applied to the rope hitch is zero (0) in step S50. The elevator control device 20 removes the weight of the car 3 itself from the weight detected by the load signal applied to the rope hitch, and the object on the car 3 (that is, the object on the car 3 and the car 3). The weight of the object) is detected. The elevator control device 20 determines that the number of passengers is 0 when the weight of the object on the car 3 detected based on the load signal applied to the rope hitch is equal to or smaller than the threshold, and when the weight is larger than the threshold, It is determined that the number of passengers is greater than 0 based on the weight. In addition, as a threshold value, the weight which can determine with a human being can be used. In addition, it is possible to detect that a foreign object other than the car 3 is present by using a weight larger than the weight detected by the measurement error as a threshold value.

  If the elevator controller 20 determines in step S50 that the number of passengers is 0 (Yes), the elevator controller 20 proceeds to step S12. That is, the elevator control device 20 determines that no person is on the car 3 and on the car 3, performs the process of step S12 again, and repeats the above process.

  If it is determined in step S40 that there is no failure (No), the elevator controller 20 measures the load on the car floor and the load on the rope hitch as step S18. Specifically, the elevator control device 20 acquires the load signal of the car floor load detection device 12, measures the load applied to the car floor, acquires the load signal of the rope load detection device 10, and applies the load applied to the rope hitch. Measure.

  When the elevator control device 20 measures the load applied to the car floor 19 and the load applied to the rope hitch in step S18 and the load applied to the rope hitch, in step S20, the number of passengers of the elevator 30 is determined from the load applied to the car floor 19 and the load applied to the rope hitch, respectively. Calculate the weight of the minute. That is, the elevator control device 20 processes the acquired load signal of the car floor load detection device 12 and rides on the weight of a person riding in the car 3, specifically on the car floor 19. The weight of the object is calculated as the weight of the passenger. Further, the elevator control device 20 processes the acquired load signal of the rope hitch load detection device 10 to determine the weight of the person riding in the car 3 and the person riding on the car 3, specifically, Calculates the weight obtained by subtracting the weight of the car 3 itself from the load detected by the rope hitch load detection device 10 as the weight for the number of passengers.

  After calculating the respective weights in step S20, the elevator controller 20 calculates the weight for the number of passengers calculated from the load applied to the car floor 19 and the weight for the number of passengers calculated from the load applied to the rope hitch in step S22. It is determined whether or not. Note that the elevator control device 20 determines that they are equal if the difference between the loads is within a predetermined threshold (for example, 10 kg), and determines that they are different if they are greater than the predetermined threshold.

  If the elevator controller 20 determines in step S22 that the weights of both are equal (Yes), the process proceeds to step S12. That is, when the weights of the two are equal, the elevator control device 20 determines that there is no operator on the car 3 and that there is no problem in normal operation, and proceeds to step S12 to repeat the above-described processing.

  If it is determined in step S22 that the weights of the two are different (No), or if it is determined in step S50 that the number of passengers is not 0 (No), the elevator control device 20 has an operator on the car 3 and performs normal operation. It is determined that there is a problem with the car 3, and the traveling of the car 3 is prohibited as step S26.

  When the elevator control device 20 prohibits the traveling of the car 3 in step S26, the elevator control device 20 displays that the car 3 is not traveling on the display device 22 in step S28, and the alarm device 24 displays the car 3 in step S30. Is output (as an alarm), and in step S32, the remote monitoring center 29 is notified that the car 3 is not traveling. The elevator control device 20 can realize notification to the remote monitoring center 29 by performing communication with the communication unit 26. The elevator control device 20 ends the process after performing the process of step S32.

  The elevator 30 determines whether or not the car floor load detection device 12 has failed, and if there is a failure, performs determination using the image of the monitoring camera 32 and the load signal of the rope hitch load detection device 10. It is possible to detect that a person is riding on the car floor 19 other than the car floor 19. Thereby, for example, it is possible to more reliably prevent the car 3 from moving while a person is riding on the car 3, and the elevator 30 can be driven more safely.

  Since the elevator 30 can detect that a person is on the car floor 19 other than the car floor 19 of the car 3 with higher accuracy and simple processing, the car floor load detection device 12 is operating normally. In this case, the detection result of the car floor load detection device 12 is used, but the present invention is not limited to this. The elevator uses the rope hitch load detection device 10 and the monitoring camera 32 without providing the car floor load detection device 12 or without using the detection result of the car floor load detection device 12, and the car floor 19 of the car 3. It is also possible to detect that a person is riding other than above.

  Here, the elevator may use another method such as hydraulic pressure for the driving method of the car 3. Further, if the elevator can detect the rope hitch load with the rope hitch load detection device, the elevator 3 can support the car 3 by the main rope 4 in various ways, and the hoisting machine can be arranged in various positions. It can be a position. Thus, in this embodiment, the driving system of the car 3 and the form of the elevator are not limited.

  Moreover, the said embodiment detects suitably the case where there exists a person other than the car floor 19 of the car 3 by using the weight which can determine that there exists a person as a threshold value which determines which weight difference. be able to. The threshold value is not limited to this. For example, when the threshold is set to a weight larger than the weight detected by the measurement error and some foreign matter is present other than the car 3, the elevator may be prohibited from traveling (a state where the car is not moved).

  According to the elevator which concerns on Embodiment 1, 2 demonstrated above, safety can be improved more. In addition, you may comprise the elevator demonstrated above by combining multiple embodiment mentioned above.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1, 30 Elevator 2 Hoistway 3 Car 4 Main rope 5 Hoisting machine 6 Counterweight 7 Tail cord 8 Compensation chain 10 Rope hitch load detection device 12 Car floor load detection device 16 Car floor receiving frame 17 Car lower beam 18 Anti-vibration rubber 19 Car floor 20 Elevator control device 22 Display device 24 Alarm device 26 Communication unit 28 Inspection operation changeover switch 29 Remote monitoring center 32 Surveillance camera

Claims (3)

A car placed in the hoistway,
A rope hitch load detection device that detects a load applied to a rope hitch portion to which one end of a main rope that supports the car is fixed, and outputs the detected load as a load signal;
A car floor load detection device that detects a load applied to the car floor of the car and outputs the detected load as a load signal;
An elevator control device that controls the driving of the hoisting machine based on the load signal of the rope hitch load detection device and the load signal of the car floor load detection device, and controls the traveling of the car,
The elevator controller calculates the weight on the car and the weight in the car from the load signal of the rope hitch load detector, and the weight in the car from the load signal of the car floor load detector. And the car calculated based on the weight on the car calculated based on the load signal of the rope hitch load detecting device, the weight inside the car and the load signal of the car floor load detecting device. An elevator characterized in that when the difference between the weight and the weight is equal to or greater than a threshold value, the car is stopped. The camera further has a camera for photographing the inside of the car,
The elevator control device calculates the car calculated from the load signal of the rope hitch load detection device when the car floor load detection device breaks down and the photographed image is analyzed by the camera and it is determined that no person is shown. The elevator according to claim 1, wherein when the weight in the vehicle is equal to or greater than the threshold value, the car is stopped.   The elevator according to claim 1, wherein the threshold value is a weight that can be determined that a person is present.

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