Security system

Abstract

Provided is a safety system capable of easily managing the safety of a person present inside a shaft. The safety system has: a car-side device installed to a car of an elevator, which transmits a car-side electric wave and detects a reception strength and a reception angle of a received electric wave; a landing-side device installed to a lowermost landing at a height position inside the shaft, which transmits a landing-side electric wave and detects a reception strength and a reception angle of a received electric wave; and a person-side device installed to a person present inside the shaft, which transmits a person-side electric wave, the car-side device or the landing-side device determining whether a distance between the car and the person is shorter than a threshold distance based on the reception strength of the person-side electric wave received by the car-side device and the reception angle of the person-side electric wave, the landing-side device stopping the car by a control panel of the elevator in a case where it is determined that the distance between the car and the person is shorter than the threshold distance, and not stopping the car in a case where it is determined that the distance between the car and the person is the same as or longer than the threshold distance.

Description

TECHNICAL FIELD

[0001] The present application relates to a safety system of an elevator. BACKGROUND

[0002] Patent Literature 1 discloses a safety system of an elevator. In the safety system, a camera is provided inside a hoistway. The camera captures a worker present inside a pit. A monitor present at a remote place monitors the safety of the worker by confirming the image of the camera. For example, the monitor can stop the operation of the elevator in a case where it is judged that the safety of the worker is impaired.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2015-074521 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, in the safety system described in Patent Literature 1, a person other than the worker needs to monitor the inside of the pit. Therefore, the safety management of the worker costs.

[0008] The present application has been achieved in order to solve the above problem. An object of the present application is to provide a safety system capable of easily managing the safety of a person present inside a hoistway.

[0009] MEANS FOR SOLVING THE PROBLEM

[0010] The safety system of the present application has: a car-side device installed to a car of an elevator, which transmits a car-side radio wave and detects a reception strength and a reception angle of a received radio wave; a landing-side device installed to a height position of a lowermost landing inside a hoistway of the elevator, which transmits a landing-side radio wave and detects a reception strength and a reception angle of a received radio wave; and a person-side device installed to a person present inside the hoistway, which transmits a person-side radio wave, the car-side device or the landing-side device determining whether a distance between the car and the person is shorter than a threshold distance based on the reception strength of the person-side radio wave received by the car-side device and the reception angle of the person-side radio wave, the landing-side device stopping a control panel of the elevator in a case where it is determined that the distance between the car and the person is shorter than the threshold distance, the landing-side device not stopping the car in a case where it is determined that the distance between the car and the person is the same as or longer than the threshold distance.

[0011] EFFECT OF THE INVENTION

[0012] According to the present application, the car is stopped in a case where it is determined that the distance between the car and the person is shorter than the threshold distance. Therefore, the safety of the person present inside the hoistway can be easily managed. Attached Figure Description

[0013] Figure 1 This is a diagram showing an overview of the safety system in Implementation 1.

[0014] Figure 2 This is a block diagram of the security system in Implementation Method 1.

[0015] Figure 3 This is a diagram showing an overview of the security system in Implementation 1.

[0016] Figure 4 This is a diagram showing an overview of the safety system in Implementation 1.

[0017] Figure 5 This is a flowchart illustrating the outline of the second operation of the safety system in Implementation 1.

[0018] Figure 6 This is a diagram showing an overview of the safety system in Implementation 1.

[0019] Figure 7 This is a diagram showing an overview of the safety system in Implementation Method 2.

[0020] Figure 8 This is a flowchart illustrating the operation of the safety system in Implementation Method 2.

[0021] Figure 9 This is a diagram showing an overview of the safety system in Implementation Method 3. Detailed Implementation

[0022] The accompanying drawings illustrate the methods for implementing the invention. Furthermore, in each drawing, the same or corresponding parts are labeled with the same reference numerals. Repetitive descriptions of these parts have been appropriately simplified or omitted.

[0023] Implementation method 1.

[0024] Figure 1 This is a diagram showing an overview of the safety system in Implementation 1.

[0025] exist Figure 1 In the elevator system 1, the shaft 2 runs through all floors of the building 3. The pit 2a is the bottom of the shaft 2. Although not shown in the figure, pit equipment such as buffers and pit switches are installed in the pit 2a.

[0026] Multiple landing stations 4 are respectively located on each floor of building 3. Each landing station 4 is positioned opposite shaft 2. Figure 1 The diagram shows the lowest floor station 4 (level 1, i.e., bottom floor station 4a) and the second floor station 4 (level 2, i.e., upper floor station 4b). Each floor station floor 5 corresponds to one of the floor stations 4. The floor station floor 5 is the floor of the corresponding floor station 4.Figure 1 The lowermost landing floor 5a and the upper landing floor 5b, i.e., the 2nd floor, are shown in the middle.

[0027] The car 6 is provided inside the shaft 2. The car 6 is capable of ascending and descending inside the shaft 2. The car 6 has a car floor surface 6a. The car floor surface 6a is a surface of the outside of the car 6 that faces the pit 2a. For example, the car floor surface 6a is a portion that exists in the lowermost part in the car 6.

[0028] The control panel 7 is provided in a machine room, which is not shown. The control panel 7 is capable of integrally controlling the elevator system 1. Specifically, the control panel 7 is capable of integrally controlling the ascending and descending actions of the car 6.

[0029] The safety system 10 is applied to the elevator system 1. The safety system 10 is a system that ensures the safety of a person H who performs a maintenance work in the pit 2a. For example, the person H performs a maintenance work such as an inspection of the equipment of the lower part of the car 6, an investigation of an abnormal noise, and the like in the pit 2a. At this time, the car 6 is sometimes moved by the person H by a check use ascending operation. Alternatively, the car 6 is sometimes manually operated by a work person who is different from the person H.

[0030] The safety system 10 has a car side device 20, a landing side device 30, and a person side device 40. In addition, the safety system 10 can also include the structure of the elevator system 1 such as the control panel 7.

[0031] The car side device 20 is installed to the car 6. For example, the car side device 20 is installed to the car floor surface 6a. A distance to a portion that exists in the lowermost part of the car 6 is set in the car side device 20. In addition, in the case where the car side device 20 is installed to the car floor surface 6a, in the car side device 20, the distance to the portion that exists in the lowermost part of the car 6 can be set to 0, or the setting of the distance to the portion that exists in the lowermost part of the car 6 can be omitted.

[0032] The car side device 20 transmits and receives an electric wave of a specific frequency as a beacon device. For example, the car side device 20 transmits a car side electric wave. The car side device 20 detects a reception intensity of the received electric wave. The car side device 20 detects a distance to a device that has transmitted the electric wave based on the reception intensity of the electric wave. The car side device 20 detects a direction in which the device that has transmitted the electric wave exists based on a phase or the like of the received electric wave. The car side device 20 detects a reception angle, i.e., an angle at which the device that has transmitted the electric wave exists with respect to a direction that is a reference based on the detected information.

[0033] The hall side device 30 is installed inside the hoistway 2. For example, the hall side device 30 is installed to an inner wall of the hoistway 2. At this time, the hall side device 30 is installed at the same height as the height of the hall floor 5a of the lowermost hall 4a with respect to the floor surface of the pit 2a. A distance in the vertical direction to the hall floor 5a is set in the hall side device 30. In addition, in the case where the hall side device 30 is installed at the same height as the hall floor 5a, in the hall side device 30, the distance to the hall floor 5a can be set to 0, or the setting of the distance to the hall floor 5a can be omitted.

[0034] The hall side device 30, like the car side device 20, transmits and receives an electric wave of a specific frequency as a beacon device. For example, the hall side device 30 transmits a hall side electric wave. The car side device 20 detects the reception intensity of the received electric wave. The hall side device 30, like the car side device 20, detects the distance to the device that transmitted the electric wave and the reception angle on the basis of the reception intensity, phase, and the like of the received electric wave.

[0035] The hall side device 30 can notify the control panel 7 of an instruction to stop the car 6. Specifically, for example, the hall side device 30 is electrically connected to a pit switch, and can cut off a safety circuit of the elevator system 1. In the case where the safety circuit is cut off, the control panel 7 stops the car 6. In addition, the hall side device 30 can be provided so as to be able to communicate with the control panel 7 by wire or wirelessly. In this case, the hall side device 30 can also be able to transmit an instruction to stop the car 6 to the control panel 7. For example, as an action to stop the car 6, the hall side device 30 can also transmit an instruction to stop the car 6 to the control panel 7 instead of cutting off the safety circuit.

[0036] The person side device 40 is installed to a person H who performs work in the pit 2a. For example, the person side device 40 is installed to the top of the head of the person H. A distance to the top of the head of the person who is installed is set in the person side device 40. In addition, in the case where the person side device 40 is installed to the top of the head of the person H, in the person side device 40, the distance to the top of the head of the person can be set to 0, or the setting of the distance to the top of the head of the person can be omitted.

[0037] The person side device 40 transmits and receives an electric wave of a specific frequency as a beacon device. For example, the person side device 40 transmits a person side electric wave.

[0038] When maintenance inspection of the elevator system 1 is performed, the car 6 sometimes performs ascending and descending in a state where the person H is present in the pit 2a. At this time, the person side device 40 transmits the person side electric wave at a predetermined cycle. The car side device 20 receives the person side electric wave. The car side device 20 calculates the distance from the top of the head of the person to the lowermost part of the car 6 on the basis of the received person side electric wave. In the case where the distance is less than a predetermined threshold value, the hall side device 30 stops the car 6.

[0039] Next, using Figure 2 The safety system 10 will be described.

[0040] Figure 2 is a block diagram of the safety system in Embodiment 1.

[0041] As Figure 2 indicated, the car side device 20 has a wave section 21, a detection section 22, and a calculation section 23.

[0042] The wave section 21 performs transmission and reception of waves as a wave section on the car side. For example, the wave section 21 includes one or more antennas and a control device for the antennas. Specifically, the wave section 21 can also perform transmission of waves, reception of waves, and control thereof using BLE (Bluetooth Low Energy) technology in accordance with the standard of Bluetooth (registered trademark). Through the wave section 21, the car side device 20 is able to communicate with the hall side device 30 and the person side device 40 via waves.

[0043] The wave section 21 is able to detect the reception intensity of a received wave and the direction from which the wave was transmitted. Specifically, for example, the wave section 21 detects the direction from which a wave was transmitted using a plurality of antennas based on an angle measurement method of waves called AoA (Angle of Arrival). At this time, the wave section 21 detects the direction from which the wave was transmitted by detecting the phase difference of waves received by each of the plurality of antennas. The wave section 21 detects the angle of reception based on the direction.

[0044] The detection section 22 is a sensor that detects the acceleration of the car side device 20. For example, the detection section 22 detects the movement of the car 6 by detecting acceleration.

[0045] The calculation section 23 performs calculations based on the waves received by the wave section 21 and the measurement values of the detection section 22 as a calculation section on the car side. The calculation section 23 performs calculations for each determination made by the car side device 20. For example, the calculation section 23 is a microcomputer having a memory and a processor. Information necessary for the calculations is saved in the calculation section 23. The functions of the calculation section 23 are realized by the processor executing a program stored in the memory.

[0046] The hall side device 30 has a wave section 31, a communication section 32, an instruction section 33, and a calculation section 34.

[0047] The wave section 31 performs transmission and reception of waves as a wave section on the hall side. For example, the wave section 31 includes one or more antennas and a control device for the antennas. The wave section 31 performs transmission of waves, reception of waves, and control thereof using BLE technology in accordance with the standard of Bluetooth similarly to the wave section 21.

[0048] The electric wave section 31 is capable of detecting the reception intensity of the received electric wave and the direction from which the electric wave was transmitted. The electric wave section 31 detects the direction from which the electric wave was transmitted based on the electric wave goniometry method identical to that of the electric wave section 21. The electric wave section 31 detects the reception angle based on the direction.

[0049] The communication section 32 is capable of communicating with the control panel 7. For example, the communication section 32 is an interface that electrically communicates with the control panel 7. Specifically, the communication section 32 is connected to the control panel 7 via a serial communication bus that is not shown and is wired in each of the plurality of landings 4. The serial bus is connected to the control panel 7. Figure 2

[0050] The instruction section 33 is a device capable of notifying the control panel 7 of an instruction for stopping the car 6. For example, the instruction section 33 is a contact that causes a safety circuit, which is not shown, to be opened. In this case, the instruction section 33 is electrically connected to a pit switch, which is not shown. Further, for example, the instruction section 33 is an interface that transmits an instruction to the control panel 7. Alternatively, the function of the instruction section 33 can be included in the communication section 32.

[0051] The operation section 34 performs operations based on the electric wave received by the electric wave section 31 and the information received by the communication section 32 as a landing-side operation section. The operation section 34 performs operations for each determination performed by the landing-side device 30. For example, the operation section 34 is a microcomputer having a memory and a processor. Information necessary for the operations is stored in the operation section 34. The operation section 34 is capable of controlling the operation of the instruction section 33. The function of the operation section 34 is realized by the processor executing a program stored in the memory.

[0052] The human-side device 40 has an electric wave section 41 and an informing section 42. The electric wave section 41 performs transmission and reception of electric waves as a human-side electric wave section. For example, the electric wave section 41 includes one or more antennas and an antenna control device. The electric wave section 41 performs transmission of electric waves, reception of electric waves, and control thereof using the BLE technology in accordance with the standard of Bluetooth (registered trademark) in the same manner as the electric wave section 21 and the electric wave section 31. The informing section 42 is capable of informing a human of information. For example, the informing section 42 includes a speaker that emits a sound and a speaker control device. For example, the informing section 42 emits a sound based on the electric wave received by the electric wave section 41.

[0053] Further, the electric wave section 21, the electric wave section 31, and the electric wave section 41 can detect the direction in which the electric wave-transmitting device exists based on other electric wave goniometry methods other than the method called AoA. Specifically, for example, the electric wave section 21, the electric wave section 31, and the electric wave section 41 can operate based on the electric wave goniometry technology called AoD (Angle of Departure).

[0054] ​In a case where an angle measurement technique called AoD is employed, the wave section 41 includes a plurality of antennas. The wave section 41 transmits a plurality of person-side waves corresponding to the plurality of antennas, respectively. The wave section 21 and the wave section 31 each include at least one antenna. The wave section 21 detects the direction in which the person-side wave is transmitted, that is, the direction in which the person-side device 40 exists, by detecting a difference in phase between the plurality of person-side waves. The wave section 31 detects the direction in which the person-side device 40 exists in the same manner as the wave section 21.

[0055] Next, the use of the safety system 10 will be described. Figure 3 The first operation of the safety system 10 will be described.

[0056] Figure 3 is a diagram showing an outline of the safety system in Embodiment 1.

[0057] As shown in Figure 3 , in the first operation, the car-side device 20 calculates a distance Y from the top of the head of the person H to the portion existing at the lowermost part in the car 6. Hereinafter, the height position of the person-side device 40 is regarded as the height position of the top of the head of the person H. The height position of the car-side device 20 is regarded as the height position of the portion existing at the lowermost part in the car 6. That is, the distance Y is the distance from the person-side device 40 to the car floor surface 6a.

[0058] The car-side device 20 receives the person-side wave transmitted from the person-side device 40. The car-side device 20 calculates the distance X from the car-side device 20 to the person-side device 40 on the basis of the reception intensity of the person-side wave.

[0059] The car-side device 20 detects the direction in which the person-side device 40 exists on the basis of the received person-side wave. The car-side device 20 detects the reception angle Θ of the person-side device 40 with respect to the car floor surface 6a on the basis of the direction in which the person-side device 40 exists. The reception angle Θ is the angle formed by the line segment connecting the car-side device 20 to the person-side device 40 and the car floor surface 6a serving as a reference surface. Alternatively, the reception angle Θ is the elevation angle of the person-side device 40 with the car-side device 20 as the origin and the car floor surface 6a as the reference surface.

[0060] The car-side device 20 calculates the distance Y from the calculated distance X and the reception angle Θ on the basis of the following (1) formula. The (1) formula is derived from a geometrical relationship as shown in Figure 2 .

[0061] Y = X * sin Θ (1)

[0062] The car-side device 20 determines whether the calculated distance Y is smaller than a prescribed threshold distance. The car-side device 20 judges that safety of the person H is ensured in a case where the distance Y is determined to be the prescribed threshold distance or more, and does not particularly perform an action. In addition, the car-side device 20 can cause the person-side device 40 to notify information indicating the calculated distance Y by sound or the like.

[0063] The car-side device 20 transmits a car-side radio wave indicating an instruction to stop the car 6 in a case where the distance Y is determined to be smaller than the prescribed threshold distance. The hall-side device 30 receives the car-side radio wave. In this case, the hall-side device 30 performs an action to stop the car 6 to the control panel 7. The control panel 7 stops the car 6. In addition, the person-side device 40 can notify a meaning of danger by sound or the like in a case where the car-side radio wave is received.

[0064] Next, the use of Figure 4 and Figure 5 the second action of the safety system is described.

[0065] Figure 4 is a diagram indicating an outline of the safety system in Embodiment 1. Figure 5 is a flowchart for describing an outline of the second action of the safety system in Embodiment 1.

[0066] In the second action, the car-side device 20 calculates a distance X' that is corrected from the distance X calculated in the first action. The car-side device 20 uses the distance X' instead of the distance X. That is, the car-side device 20 calculates the distance Y from the distance X' and the reception angle θ on the basis of the formula (1). The correction of the distance X is performed on the basis of one of several methods.

[0067] In one example of the method of the correction, the distance X is corrected on the basis of a measured value of the acceleration sensor that is the detection section 22. In performing the correction, the car-side device 20 uses information of the reception strength of the hall-side radio wave from the hall-side device 30 in conjunction.

[0068] Specifically, the car-side device 20 calculates a first distance A between a lowermost portion of the car 6 and the hall floor 5a of the lowermost floor on the basis of the reception strength of the hall-side radio wave. The first distance A is a distance based on the reception strength of the radio wave. In addition, the distance between the lowermost portion of the car 6 and the hall floor 5a of the lowermost floor can be regarded as a value that is the same as a difference between the height position of the car-side device 20 and the height position of the hall-side device 30. In calculating the first distance A, a distance between the lowermost portion of the car 6 and the car-side device 20 can be used. In calculating the first distance A, a distance between the hall floor 5a and the hall-side device 30 can also be used.

[0069] The detection section 22 of the car side device 20 always measures the acceleration in the vertical direction of the car 6. The car side device 20 calculates the moving speed of the car side device 20 and the moving distance of the car side device 20 by time-integrating the measured value of the acceleration. That is, the car side device 20 calculates the height position of the car 6. The car side device 20 calculates the second distance B between the lowermost portion of the car 6 and the landing floor 5a on the basis of the moving distance. The second distance B is a distance based on the acceleration. Also, the second distance B, like the first distance A, can be regarded as a value identical with the difference between the height position of the car side device 20 and the height position of the landing side device 30.

[0070] In one example of the correction method, the car side device 20 determines that the car 6 is stopped at the lowermost landing 4a when the moving speed of the car 6 is 0 and the first distance A is 0. In this case, the car side device 20 resets the second distance B based on the acceleration to 0. The car side device 20 determines that the car 6 is stopped at the upper landing 4b when the moving speed of the car 6 is 0 and the first distance A is the distance from the lowermost landing 4a to the upper landing 4b. In this case, the car side device 20 resets the second distance B based on the acceleration to the distance from the lowermost landing 4a to the upper landing 4b. The distance from the lowermost landing 4a to the upper landing 4b is set for each building and stored in the car side device 20. For example, the distance is set to 4 m.

[0071] The car side device 20 calculates the corrected distance X' from the distance X, the first distance A, and the second distance B on the basis of the following equation (2).

[0072] X' = X * B / A (2)

[0073] Then, the car side device 20 calculates the distance Y on the basis of the distance X' and performs the same operation as the first operation. That is, the correction of the distance Y is performed on the basis of the first distance A and the second distance B.

[0074] Figure 5 The flowchart shown is started at an arbitrary timing. Also, in the flowchart, the car 6 is in a state where it is not stopped at either the lowermost landing 4a or the upper landing 4b.

[0075] In step S001, the person side device 40 transmits the person side electric wave. The car side device 20 receives the person side electric wave.

[0076] Then, the operation of step S002 is performed. In step S002, the car side device 20 calculates the distance X on the basis of the reception strength of the person side electric wave. The car side device 20 calculates the reception angle θ.

[0077] Then, the process of step S003 is performed. In step S003, the car side device 20 receives the landing side electric wave. The car side device 20 calculates the first distance A based on the received intensity of the electric wave. The car side device 20 calculates the second distance B based on the acceleration.

[0078] Then, the process of step S004 is performed. In step S004, the car side device 20 calculates the distance X' in which the distance X is corrected using the first distance A and the second distance B.

[0079] Then, the process of step S005 is performed. In step S005, the car side device 20 calculates the distance Y.

[0080] Then, the process of step S006 is performed. In step S006, the car side device 20 determines whether the distance Y is less than a predetermined threshold distance.

[0081] In a case where it is determined in step S006 that the distance Y is equal to or greater than the predetermined threshold distance, the process of step S007 is performed. In step S007, the car side device 20 transmits an instruction to cause the person side device 40 to notify the value of the distance Y. The person side device 40 notifies the value of the distance Y to the person H by voice.

[0082] Then, the process of the flowchart ends.

[0083] In a case where it is determined in step S006 that the distance Y is less than the predetermined threshold distance, the process of step S008 is performed. In step S008, the car side device 20 transmits a car side electric wave indicating an instruction to stop the car 6. The landing side device 30 performs a process to stop the car 6 based on the car side electric wave. The person side device 40 notifies the meaning of notifying danger based on the car side electric wave.

[0084] Then, the process of the flowchart ends.

[0085] In addition, after the car 6 is stopped by the landing side device 30, an operation to restart the operation of the car 6 is performed by an operator such as the person H.

[0086] In addition, in the first operation, steps S003 and S004 in the flowchart are omitted, and the process of step S005 is performed after step S002. Figure 5

[0087] ​According to the above-described embodiment 1, the safety system 10 has the car side device 20, the hall side device 30, and the person side device 40. The car side device 20 calculates the distance between the car 6 and the person H. In a case where it is determined that the distance between the car 6 and the person H is shorter than the threshold distance, the hall side device 30 performs an operation of stopping the car 6 by the control panel 7. At this time, the monitoring of the monitor or the like other than the person H is not required. Therefore, the safety of the person H present inside the shaft 2 can be easily managed.

[0088] Also, in a case where the monitor or the like performs an operation while monitoring the person present in the pit 2a as in the past, the monitor or the like needs to perform the operation while making contact with the person. Therefore, the workability of the operation is reduced. According to the present embodiment, the contact for safety management is not required, and therefore the reduction in workability can be suppressed.

[0089] In addition, the processing of the calculation and the determination performed by the car side device 20 can be performed by the hall side device 30 instead. In this case, the car side device 20 can also transmit the car side wave indicating the information of the difference between the reception intensity and the phase of the person side wave to the hall side device 30. Alternatively, the car side device 20 can also perform the calculation up to the distance X and the reception angle θ, and transmit the car side wave indicating the values of the distance X and the reception angle θ to the hall side device 30. The hall side device 30 can also perform the necessary calculation and determination based on the received car side wave.

[0090] Further, the car side device 20 measures the acceleration. In the safety system 10, the distance X between the car 6 and the person H is corrected to a distance X' based on the height position of the car 6 calculated from the measured value of the acceleration and the reception intensity of the hall side wave received by the car side device 20. At this time, the distance X is corrected to the distance X' based on the ratio of the first distance A to the second distance B. That is, the distance Y is corrected based on the first distance A and the second distance B. Therefore, the distance between the car 6 and the person H can be more accurately calculated. Specifically, the distance is calculated using the ratio of the first distance to the second distance. As a result, the safety of the safety system 10 can be improved.

[0091] Further, the person side device 40 notifies the person H of the value of the distance between the car 6 and the person H. Therefore, the person H can perform safety management based on the notified distance.

[0092] Further, the car side device 20 is installed to the car floor surface 6a. The hall side device 30 is installed at the same height as the lowermost hall floor 5a. The person side device 40 is installed to the top of the head of the person H. In this case, the position where the car side electric wave is transmitted from the car side device 20 corresponds to the position of the lowermost portion of the car 6. The position where the electric wave is received and the position where the hall side electric wave is transmitted from the hall side device 30 correspond to the height position of the hall floor 5a. The position where the person side electric wave is emitted from the person side device 40 corresponds to the position of the uppermost portion of the person H. Therefore, in the safety system 10, the position of the lowermost portion of the car 6, the height position of the hall floor 5a, and the position of the uppermost portion of the person H can be accurately grasped without performing additional operations. As a result, the safety of the person H can be further improved.

[0093] Further, in the safety system 10, each action is performed by the car side device 20, the hall side device 30, and the person side device 40 transmitting and receiving electric waves. Therefore, the safety system 10 can be retrofitted to an existing device. As a result, the safety system 10 can be applied to a wide variety of types and models of elevators.

[0094] Further, the safety system 10 can also be applied to an elevator system 1 in which a machine room or a control panel 7 is not provided in the lower or upper portion of the hoistway 2.

[0095] Further, in the safety system 10, the operation processing performed by the car side device 20 can also be performed by the hall side device 30. Further, the operation processing performed by the hall side device 30 can also be performed by the car side device 20. In either case, the car side device 20 and the hall side device 30 provide information to each other by transmitting or receiving electric waves representing the required information.

[0096] Next, another example of the correction method applied in the second action of the safety system 10 will be described. Figure 6 Another example of the correction method applied in the second action of the safety system 10 will be described.

[0097] Figure 6 is a diagram showing an outline of the safety system in Embodiment 1.

[0098] In Figure 6 In another example shown in FIG. 8, a third distance B' based on the operation information of the car 6 is used for the correction of the distance X, instead of the second distance B in the first example. For example, the operation information of the car 6 is generated by the control panel 7 based on a signal from a speed governor encoder or the like, not shown.

[0099] In another example, the hoistway-side device 30 acquires information of the height position of the car 6 from the control panel 7. The hoistway-side device 30 transmits a hoistway-side radio wave indicating the information of the height position of the car 6 to the car-side device 20. The car-side device 20 calculates the 3rd distance B' between the lowermost portion of the car 6 and the 3rd floor 5c based on the height position of the car 6 indicated by the hoistway-side radio wave.

[0100] The car-side device 20 calculates the distance X' corrected for the distance X using the 3rd distance B' in place of the 2nd distance B. Therefore, the distance Y is corrected based on the 3rd distance B'.

[0101] According to another example of the embodiment 1 described above, the hoistway-side device 30 acquires information of the height position of the car 6 acquired from the control panel 7. In the safety system 10, the distance X between the car 6 and the person H is corrected to the distance X' based on the height position of the car 6 acquired from the control panel 7 and the reception strength of the hoistway-side radio wave received by the car-side device 20. Therefore, the distance between the car 6 and the person H can be more accurately calculated.

[0102] Embodiment 2.

[0103] Figure 7 is a diagram indicating an outline of the safety system in the embodiment 2. Figure 8 is a diagram indicating a flowchart of the operation of the safety system in the embodiment 2. In addition, the same reference numerals are attached to the parts common or corresponding to those of the embodiment 1. The description of the parts is omitted.

[0104] As shown in Figure 7 , the hoistway-side device 30 calculates the reception angle λ as the direction in which the person-side device 40 exists based on the person-side radio wave. The hoistway-side device 30 determines whether the person-side device 40 exists at a position lower than the 3rd floor 5c based on the reception angle λ.

[0105] Specifically, the hoistway-side device 30 calculates the reception angle λ as the elevation angle of the person-side device 40 with respect to a reference plane including the hoistway-side device 30 and perpendicular to the horizontal direction based on the direction in which the person-side device 40 exists. Further, the reception angle λ can be defined as the angle that the line segment connecting the hoistway-side device 30 and the person-side device 40 makes with respect to the reference axis oriented in the vertical direction and passing through the hoistway-side device 30.

[0106] The landing-side device 30 determines whether the reception angle λ is less than 90°. The landing-side device 30 determines that the position of the person-side device 40, that is, the position of the person H, exists at a position lower than the landing-side device 30 itself, that is, at a position lower than the lowermost landing floor 5a, in the case where it is determined that the reception angle λ is less than 90°. The landing-side device 30 determines that the position of the person-side device 40, that is, the position of the person H, exists at a position at the same height as the lowermost landing floor 5a or at a position higher than the landing floor 5a, in the case where it is determined that the reception angle λ is 90° or more. Here, the landing-side device 30 can also regard the position of the person-side device 40 as the height position of the top of the head of the person H. Alternatively, the landing-side device 30 can also calculate the height position of the top of the head of the person H from the position of the person-side device 40.

[0107] The landing-side device 30 transmits an instruction to the control panel 7 to run at a low speed slower than the normal running speed, in the case where it is determined that the reception angle λ is 90° or more.

[0108] The landing-side device 30 transmits an instruction to the control panel 7 to run at the normal running speed, in the case where it is determined that the reception angle λ is less than 90°. In terms of safety management, the car 6 is controlled to temporarily stop when it reaches the lowermost landing floor 5a in the case of descending movement. Therefore, in the case where the person-side device 40 exists at a position lower than the lowermost landing floor 5a, the safety of the person H existing in the pit 2a can be ensured even if the car 6 runs at the normal running speed.

[0109] Figure 8 The flowchart shown starts at any timing.

[0110] In step S101, the person-side device 40 transmits the person-side electric wave. The landing-side device 30 receives the person-side electric wave.

[0111] Then, the action of step S102 is performed. In step S102, the landing-side device 30 calculates the reception angle λ.

[0112] Then, the action of step S103 is performed. In step S103, the landing-side device 30 determines whether the reception angle λ is less than 90°.

[0113] In the case where it is determined in step S103 that the reception angle λ is less than 90°, the action of step S104 is performed. In step S104, the landing-side device 30 transmits an instruction to the control panel 7 to run at the normal running speed. In addition, in step S104, the landing-side device 30 can also end without transmitting the instruction.

[0114] Then, the action of the flowchart ends.

[0115] In a case where it is determined in step S103 that the reception angle λ is 90° or more, the operation of step S105 is performed. In step S105, the landing side device 30 transmits an instruction to run at a low speed slower than a normal running speed to the control panel 7.

[0116] Then, the operation of the flowchart ends.

[0117] According to Embodiment 2 described above, the landing side device 30 transmits an instruction related to the running speed of the car 6 to the control panel 7 in accordance with the reception angle of the person side electric wave. Specifically, in the past, in a case where work is performed in the pit 2a, the car 6 runs at a low speed slower than a normal running speed. In the present embodiment, in a case where the person H is present at a position lower than the landing floor 5a, since safety is ensured, the car 6 can run at a normal running speed. Therefore, it is possible to suppress a decrease in work efficiency of maintenance work. That is, in the safety system 10, it is possible to ensure the safety of the person H without deteriorating the workability of maintenance.

[0118] In addition, the landing side device 30 can determine whether the person side device 40 is present at a position lower than the landing side device 30 in accordance with an elevation angle of the person side device 40, that is, a reception angle λ' with a horizontal plane including the landing side device 30 as a reference surface, instead of the reception angle λ. In this case, the following (3) holds between the reception angle λ' and the reception angle λ.

[0119] λ' = 90° - λ (3)

[0120] Embodiment 3.

[0121] Figure 9 is a diagram showing an outline of the safety system in Embodiment 3. In addition, the same reference numerals are attached to parts common to or corresponding to parts of Embodiment 1 or Embodiment 2. The description of the parts is omitted.

[0122] As shown in Figure 9 , in Embodiment 3, the landing side device 30 receives an electric wave indicating a value of the reception angle θ from the car side device 20. The landing side device 30 uses the reception angle θ and the reception angle λ to calculate the height position of the person side device 40. As shown in Figure 9 , if based on the reception angle θ and the reception angle λ, it is possible to uniquely calculate the height position of the person side device 40 in accordance with a geometrical relationship.

[0123] The hall side device 30 acquires operation information including the hoisting direction of the car 6, the height position of the car 6, and the hoisting speed of the car 6 from the control panel 7. The hall side device 30 calculates the grace time until the car 6 contacts the person H in the case where the car 6 continues to move, based on the operation information and the information of the height position of the person side device 40. Specifically, the hall side device 30 calculates the distance between the car floor surface 6a and the person H, based on the height position of the car 6 and the height position of the person side device 40. The hall side device 30 calculates the grace time until the car 6 contacts the person H by dividing the distance between the car floor surface 6a and the person H by the hoisting speed of the car 6. In this calculation, the hoisting speed of the car 6 can also be assumed to take a fixed value.

[0124] For example, the hall side device 30 transmits a hall side wave indicating the grace time. The person side device 40 receives the hall side wave indicating the grace time. The person side device 40 notifies the person H of the grace time by sound based on the hall side wave, thereby alerting the person H.

[0125] Also, the hall side device 30 can perform the operation of stopping the car 6 in the case where the grace time is shorter than a prescribed threshold time.

[0126] Also, the car side device 20 can perform the same calculation instead of the hall side device 30. In this case, the car side device 20 receives a wave indicating the value of the reception angle λ from the hall side device 30.

[0127] According to Embodiment 3 described above, the car side device 20 or the hall side device 30 calculates the height position where the person H exists based on the reception angle θ and the reception angle λ. At this time, the information of the reception strength of the person side wave does not need to be used. Therefore, the height position where the person H exists can be more accurately calculated according to the conditions in which the car side device 20 and the hall side device 30 receive the wave.

[0128] Further, the car side device 20 or the hall side device 30 calculates the grace time. The person side device 40 notifies the person H of the grace time. Therefore, the person H can be alerted of the danger of contacting the car 6. As a result, the safety can be improved.

[0129] Industrial Applicability

[0130] As described above, the safety system of the present application can be used for an elevator system.

[0131] Explanation of Reference Numerals

[0132] 1: Elevator system; 2: Shaft; 2a: Pit; 3: Building; 4: Landing; 4a: Lowest landing; 4b: Upper landing; 5: Landing floor; 5a: Lowest landing floor; 5b: 2nd landing floor; 6: Car; 6a: Car floor; 7: Control panel; 10: Safety system; 20: Car-side device; 21: Electric wave section; 22: Detection section; 23: Operation section; 30: Landing-side device; 31: Electric wave section; 32: Communication section; 33: Command section; 34: Operation section; 40: Person-side device; 41: Electric wave section; 42: Notification section; H: Person.

Claims

1. A security system, wherein, The safety system has: a car side device installed in a car of an elevator, which transmits a car side electric wave and detects a reception strength and a reception angle of a received electric wave; a landing side device installed at a height position of a lowermost landing in an inside of a shaft of the elevator, which transmits a landing side electric wave and detects a reception strength and a reception angle of a received electric wave; and a person side device installed in a person existing in the inside of the shaft, which transmits a person side electric wave, the car side device or the landing side device judges whether a distance between the car and the person is shorter than a threshold distance based on the reception strength of the person side electric wave received by the car side device and the reception angle of the person side electric wave, in a case where it is judged that the distance between the car and the person is shorter than the threshold distance, the landing side device causes a control panel of the elevator to stop the car, and in a case where it is judged that the distance between the car and the person is the same as or longer than the threshold distance, the landing side device does not cause the car to stop, the car side device measures an acceleration and calculates a height position of the car based on the measured acceleration, the car side device or the landing side device corrects a value of the distance between the car and the person based on the reception strength of the landing side electric wave received by the car side device and the height position of the car calculated by the car side device.

2. The safety system according to claim 1, wherein the car side device or the landing side device calculates a first distance between the car and the lowermost landing based on the reception strength of the landing side electric wave received by the car side device, calculates a second distance between the car and the lowermost landing based on the height position of the car calculated by the car side device based on the acceleration, and corrects the value of the distance between the car and the person using a ratio of the first distance to the second distance.

3. The safety system according to claim 1 or 2, wherein the person side device informs the person of the distance between the car and the person calculated by the car side device or the landing side device.

4. The safety system according to claim 1 or 2, wherein the landing side device judges whether the person exists at a position lower than the height of the lowermost landing based on the reception angle of the person side electric wave, the landing side device causes the control panel to operate the car at a normal operation speed in a case where it is judged that the person exists at the position lower than the height of the lowermost landing, the landing side device causes the control panel to operate the car at a speed slower than the normal operation speed in a case where it is judged that the person exists at a position the same as or higher than the height of the lowermost landing.

5. The safety system according to claim 1 or 2, wherein the car side device or the landing side device calculates a height at which the person exists based on the reception angle of the person side electric wave received by the car side device and the reception angle of the electric wave received by the landing side device.

6. The safety system according to claim 5, wherein The car-side device or the hall-side device calculates a margin time until the car contacts the person, based on operation information including a height position of the car calculated by the control panel and a speed of the car in ascending or descending, and information of a height at which the person is present, The person-side device reports the calculated margin time to the person.

7. The safety system according to claim 1 or 2, wherein The car-side device is installed on a floor surface of the car, The hall-side device is installed inside the hoistway at a height position of the lowest landing floor, The person-side device is installed on a top of the person.

8. A security system wherein, The safety system has: a car-side device installed on a car of an elevator, which transmits a car-side electric wave and detects a reception strength and a reception angle of the received electric wave; a hall-side device installed inside a hoistway of the elevator at a height position of a lowest landing floor, which transmits a hall-side electric wave and detects a reception strength and a reception angle of the received electric wave; and a person-side device installed on a person present inside the hoistway, which transmits a person-side electric wave, The car-side device or the hall-side device determines whether a distance between the car and the person is shorter than a threshold distance, based on the reception strength of the person-side electric wave received by the car-side device and the reception angle of the person-side electric wave, In a case where it is determined that the distance between the car and the person is shorter than the threshold distance, the hall-side device causes a control panel of the elevator to stop the car, and in a case where it is determined that the distance between the car and the person is equal to or longer than the threshold distance, the hall-side device does not cause the car to stop, The car-side device calculates a first distance between the car and the lowest landing floor, based on the reception strength of the hall-side electric wave, The hall-side device receives information of the height position of the car from the control panel, The car-side device or the hall-side device calculates a third distance between the car and the lowest landing floor, based on the information of the height position of the car acquired by the hall-side device from the control panel, and corrects a value of the distance between the car and the person, based on the first distance and the third distance.

9. The safety system according to claim 8, wherein The person-side device reports the distance between the car and the person calculated by the car-side device or the hall-side device to the person.

10. The safety system according to claim 8, wherein The hall-side device determines whether the person is present at a position lower than the height of the lowest landing floor, based on the reception angle of the person-side electric wave, The hall-side device causes the control panel to operate the car at a normal operation speed, in a case where it is determined that the person is present at a position lower than the height of the lowest landing floor, The hall-side device causes the control panel to operate the car at a speed slower than the normal operation speed, in a case where it is determined that the person is present at a position equal to or higher than the height of the lowest landing floor.

11. The safety system according to claim 8, wherein the car-side device or the hall-side device calculates the height at which the person is present based on a reception angle of the electric wave received by the person-side device and a reception angle of the electric wave received by the hall-side device.

12. The safety system according to claim 11, wherein the car-side device or the hall-side device calculates a grace time until the car contacts the person based on operation information and information of the height at which the person is present, the operation information including a height position of the car calculated by the control panel and a lifting speed of the car, the person-side device notifies the person of the calculated grace time.

13. The safety system according to claim 8, wherein the car-side device is installed to a bottom surface of the car, the hall-side device is installed inside the shaft at the same height as a floor of the lowermost landing, the person-side device is installed to a top of the person's head.

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