JP2010023975A - Safety device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for an elevator preventing travel of a car, even when a worker on the car forgets putting off a rope. <P>SOLUTION: The safety device for an elevator determines whether or not maintenance operation of an elevator car by a maintenance staff can be performed, in maintenance work. The safety device includes: a metallic sensor 15 detecting whether or not a hook of a safety rope put on the maintenance staff is installed at a predetermined portion on the car; a surface pressure sensor 16 detecting whether or not there is any maintenance staff in an operable range on the car; a weighing device 17 detecting presence/absence of an operator in the car or on the car, by measuring a total weight of the car and comparing it with a predetermined reference weight. It is determined whether or not the maintenance operation can be performed, based on detection results of the metallic sensor 15, the surface pressure sensor 16, and the weighing device 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator safety device for controlling permission / prohibition of an operation mode during elevator maintenance / inspection work.

  During maintenance / inspection work on the elevator car, there are many simple human errors due to incorrect operation during work, such as no operation of the inspection switch or wearing of a safety rope. As a solution, there is an elevator safety device including a safety rope attachment detection means and a mode setting means for switching the operation mode to an inspection mode in order to ensure the safety of maintenance personnel (see, for example, Patent Document 1). ).

  According to this Patent Document 1, during maintenance / inspection work on a car, it is automatically detected that a maintenance person has entered the car, and the safety device is operated, and the operation mode of the elevator is set to the operation prohibition mode. can do. Further, an alarm is issued until the safety belt hook is attached to the safety belt holding device, and during this time, the elevator is kept in the operation prohibition mode to prevent human error.

JP-A-11-32214

However, the prior art has the following problems.
A conventional safety device such as Patent Document 1 focuses on preventing a maintenance worker from wearing a safety rope on a car. However, assuming that the maintenance staff forgets to remove the safety rope and closes the landing door on the car, there is a problem that the car operates with the safety rope mounted on the car.

  Therefore, in order to solve these problems, in addition to preventing human error at the start of work, for example, during work that prevents the car from traveling due to forgetting to remove the rope by the worker on the car It is also necessary to prevent human error after work.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide an elevator safety device that can prevent a car from traveling even when an operator on the car forgets to remove the rope. And

  The elevator safety device according to the present invention is an elevator safety device that determines whether or not the maintenance operation of the elevator car by a maintenance worker is possible during maintenance work, and is a safety rope that the maintenance worker wears. Measures the total weight of the car, a metal sensor that detects whether or not the hook of the car is attached to a predetermined location on the car, a surface pressure sensor that detects whether or not there is a maintenance person in the operable area on the car , Equipped with a scale device that detects the presence or absence of maintenance personnel in the car or on the car by comparing with a predetermined reference weight, and maintenance operation is possible based on the detection results of the metal sensor, surface pressure sensor, and scale device It is determined whether or not it is in a proper state.

  According to the elevator safety device of the present invention, during maintenance and inspection, it is possible to accurately determine the presence or absence of maintenance personnel and the wearing state of the safety rope based on the detection results from various sensors. Even when the rope is forgotten, an elevator safety device that can prevent the car from traveling can be obtained.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an elevator safety device of the invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an elevator safety device according to Embodiment 1 of the present invention. The machine room 1 is provided with an operation control device 2 that performs operation control of the elevator. Here, the operation control device 2 includes a storage unit 3 in which information such as a program is stored, and a CPU 4 that performs a processing operation based on the information stored in the storage unit 3. Further, although not shown, a driving device for raising and lowering the car is further arranged.

  On the other hand, on the car 11, a car upper control device 12, a metal sensor 15, a surface pressure sensor 16, and a weighing device 17 are provided. Here, the car control device 12 includes a storage unit 13 in which information such as a program is stored, and a CPU 14 that performs a processing operation based on the information stored in the storage unit 13. Although not shown, a car door and a car operation panel are installed in the car.

  First, the function of each component on the car 11 will be described. The car control device 12 is connected to the metal sensor 15, the surface pressure sensor 16, and the scale device 17. The metal sensor 15 is a sensor that detects the mounting state of the hook of the safety rope. Then, the car control device 12 can monitor whether or not the hook of the safety rope is on a predetermined fixing portion by reading the detection signal from the metal sensor 15.

  The surface pressure sensor 16 is a sensor that detects whether or not there is a maintenance person in the operable region on the car based on the surface pressure. Then, the car control device 12 can monitor the presence or absence of maintenance personnel in the operable region on the car by reading the detection signal from the surface pressure sensor 16.

  Here, the operable area corresponds to an appropriate area on the car for ensuring the safety of the maintenance staff when the car is operated while the maintenance staff is on the car at the time of maintenance and inspection. More specifically, for example, an area defined as a certain range from the center on the car corresponds to this operable region.

  FIG. 2 is an explanatory view showing the arrangement of the metal sensor 15 and the surface pressure sensor 16 according to the first embodiment of the present invention, and is a view of the top surface of the car as viewed from the top. As shown in FIG. 2, the metal sensor 15 for detecting the mounting state of the hook of the safety rope is located at the center on the car. The surface pressure sensor 16 is arranged to detect a surface pressure within a certain range from the center on the car. An area surrounded by a dotted line in FIG. 2 corresponds to an operable region.

  The scale device 17 detects the weight of the car. Then, the car control device 12 stores the weight of the car in the no-load state (the state where no one is in the car and on the car) in the storage unit 13 in advance as a reference value, and the weight detected by the scale device 17 By comparing with, it is possible to monitor the presence or absence of maintenance personnel in the car or on the car. In addition, this scale apparatus 17 can divert the sensor for measuring the weight in a cage at the time of normal operation as it is.

  On the other hand, the operation control device 2 in the machine room 1 has a configuration capable of data communication with the car control device 12. And the operation control apparatus 2 receives the detection result of the metal sensor 15, the surface pressure sensor 16, and the scale apparatus 17 from the on-car control apparatus 12, and performs the judgment process of the driving | operation availability of a car based on this detection result. Alternatively, the operation control device 2 may be configured to receive the result of the determination process of whether or not the operation is performed performed on the car control device 12 side.

  Next, a series of determination processes of the elevator safety device according to the first embodiment will be described. FIG. 3 is a flowchart relating to a series of determination processes of the elevator safety device according to Embodiment 1 of the present invention. In addition, the description part (NO1)-(NO5) in FIG. 3 respond | corresponds to NO shown in FIG. 4 mentioned later.

  The processing shown in this flowchart is executed by the CPU 14 in the car control device 12 and the CPU 4 in the operation control device 2. More specifically, the flowchart of FIG. 3 shows the processing by the car control device 12 based on the detection results of the metal sensor 15, the surface pressure sensor 16, and the scale device 17, and the operation control device 2 from the car control device 12. The information sent to is summarized.

  First, in step S101, the car control device 12 monitors the presence or absence of maintenance personnel in the operable area from the detection result of the surface pressure sensor 16 installed in the operable area on the car. Then, when the surface pressure sensor 16 is ON and it is determined that there is a maintenance person in the operable area, the on-car control device 12 performs the processing after step S111.

  On the other hand, when the surface pressure sensor 16 is OFF and it is determined that there is no maintenance person in the operable region, the car control apparatus 12 proceeds to step S102 and transmits a maintenance person non-detection signal to the operation control apparatus 2. To do.

  Next, in step S103, the on-car control device 12 monitors whether or not the hook of the safety rope is attached to a predetermined fixing portion from the detection result of the metal sensor 15. When the car control device 12 determines that the metal sensor 15 is OFF and the safety rope is not attached, the process proceeds to step S104 and transmits a safety rope non-wearing signal to the operation control device 2. . The safety rope non-wearing signal here means that there is no maintenance staff in the operable region, and the safety rope is not detected, so that the safety rope is not forgotten to be removed.

  On the other hand, when it is determined that the metal sensor 15 is ON and the safety rope is in the mounted state, the car control device 12 proceeds to step S105 and transmits a safety rope wearing signal to the operation control device 2. Here, the safety rope wearing signal means that the safety rope has been detected but the safety rope has been forgotten to be removed even though there is no maintenance person in the operable region.

  After transmitting the safety rope non-installation signal in step S104, the on-car control device 12 determines whether the maintenance person is on the car outside the operable region or in the car from the detection result of the scale device 17 in step S106, or on the landing. Monitor whether you are in

  Then, the car control device 12 determines that there is a possibility that there is a maintenance person on the car when the detection result of the scale device 17 is equal to or higher than the reference value, and proceeds to step S107, and the maintenance person The on-car detection signal is transmitted to the operation control device 2. Here, the maintenance worker on-car detection signal means that maintenance personnel are not detected in the operable area and the safety rope has been removed, but the car weight exceeds the reference value, so It means that you may be in an area other than the operable area.

  On the other hand, if the detection result of the scale device 17 is less than the reference value and it is determined that the maintenance person is not on the car, the car control device 12 proceeds to step S108, and the maintenance person is not on the car. The detection signal is transmitted to the operation control device 2. The signal on the maintenance staff not detected here means that maintenance staff is not detected in the operable area, the safety rope has been removed, and the weight of the car is below the reference value, so that maintenance operation is possible. It means that.

  In step S101, after determining that the surface pressure sensor 16 is ON and that there is a maintenance person who operates in the operable region, the car control device 12 determines from the detection result of the metal sensor 15 in step S109. Then, it is monitored whether or not the hook of the safety rope is attached to a predetermined fixing portion.

  When the car controller 12 determines that the metal sensor 15 is OFF and the safety rope is not attached, the process proceeds to step S110. This case corresponds to the case where a safety rope is not worn even though there are maintenance personnel in the operable area.

  On the other hand, when it is determined that the metal sensor 15 is ON and the safety rope is attached, the on-car controller 12 proceeds to step S111. This case corresponds to a case where maintenance personnel are present in the operable region and a safety rope is worn.

  Then, after the processing of step S105 and step S107, or after the metal sensor 15 is determined to be OFF in step S109, the car-top controller 12 prevents the maintenance operation in step S110 because the maintenance operation conditions are not satisfied. It is determined that it should be, and the fact is transmitted to the operation control device 2.

  On the other hand, after the process of step S108 or after the metal sensor 15 is determined to be ON in step S109, the car control device 12 determines in step S111 that the maintenance operation condition is satisfied and the maintenance operation is possible. Then, the fact is transmitted to the operation control device 2.

  FIG. 4 summarizes the determination of the operation possible / operation inhibition based on the detection result of the sensor in the first embodiment of the present invention. As shown in FIG. 4, the car control device 12 makes five determinations of NO1 to NO5 according to the detection results of the metal sensor 15, the surface pressure sensor 16, and the scale device 17. The state of NO1 and NO4 means a state where the maintenance operation conditions are in place, and maintenance operation is possible. On the other hand, the states of NO2, NO3, and NO5 mean that the maintenance operation conditions are not satisfied, and the maintenance operation is prevented.

  As described above, according to the first embodiment, it is possible to determine the presence / absence of maintenance personnel and the wearing state of the safety rope based on the detection results from various sensors during maintenance inspection. As a result, it is possible to accurately determine whether or not the maintenance operation condition is satisfied, and it is possible to prevent the maintenance worker from forgetting to remove the safety rope on the car and to prevent the maintenance operation.

It is a block diagram of the safety device of the elevator in Embodiment 1 of this invention. It is explanatory drawing which showed arrangement | positioning of the metal sensor and surface pressure sensor in Embodiment 1 of this invention. It is a flowchart regarding a series of judgment processing of the safety device of the elevator in Embodiment 1 of this invention. FIG. 6 summarizes the determination of whether or not operation is possible based on the detection result of the sensor according to Embodiment 1 of the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Machine room, 2 Operation control apparatus, 3 Memory | storage part, 11 Car, 12 Car top control apparatus, 13 Storage part, 15 Metal sensor, 16 Surface pressure sensor, 17 Scale apparatus.

Claims (3)

An elevator safety device that determines whether maintenance operation of an elevator car by maintenance personnel is possible during maintenance work,
A metal sensor that detects whether or not a hook of a safety rope worn by maintenance personnel is attached to a predetermined location on the car;
A surface pressure sensor that detects whether there is a maintenance person in the operable area on the car;
A weighing device that measures the total weight of the car and compares it with a predetermined reference weight to detect the presence or absence of maintenance personnel in the car or on the car,
An elevator safety device, wherein whether or not the maintenance operation is possible is determined based on detection results of the metal sensor, the surface pressure sensor, and the scale device. In the elevator safety device according to claim 1,
When the safety state of the safety rope is detected by the metal sensor, and when it is detected by the contact pressure sensor that a maintenance person is in the operable region, or when the safety rope is not installed by the metal sensor. The maintenance operation is possible when it is detected by the surface pressure sensor that maintenance personnel are not in the operable region, and the scale device detects that no maintenance personnel are in or on the cage. A safety device for an elevator characterized by being judged to be in a safe state. In the elevator safety device according to claim 1 or 2,
When the safety state of the safety rope is detected by the metal sensor, and when it is detected by the contact pressure sensor that a maintenance person is not in the operable region, the safety rope may be forgotten to be removed. A safety device for an elevator characterized in that it is determined that maintenance operation is not possible.

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