Elevator abnormality detection device and elevator abnormality detection method

Abstract

Provided is an elevator abnormality detection device that can detect an abnormality occurring in a hoistway at an early stage even when the operating sound of the equipment does not change due to the abnormality occurring in the hoistway. [Solution] The abnormality detection device 10 for an elevator 100 according to the present disclosure comprises an operation acquisition unit 11 that acquires operation information, an airflow detection unit 12 that detects airflow information, an abnormality judgment unit 13 that compares the operation information and airflow information at the same time with a normal value that is previously linked to the operation information as airflow information detected in the elevator shaft 1 in a normal state, and judges that an abnormality has occurred in the elevator shaft 1 if the airflow information is smaller than the normal value, and an alarm unit 14 that alerts that an abnormality has occurred in the elevator shaft 1 if the abnormality judgment unit 13 judges that an abnormality has occurred in the elevator shaft 1.

Description

[Technical Field]

[0001] The present disclosure relates to an elevator abnormality detection device and an elevator abnormality detection method. [Background technology]

[0002] Conventionally, elevator abnormality detection devices that detect abnormalities in equipment installed in an elevator shaft include elevator abnormality detection devices that detect abnormalities by collecting and analyzing operating sounds emitted by the equipment. For example, Patent Document 1 discloses an elevator abnormality detection device that detects abnormalities by installing sound-collecting microphones near multiple pieces of equipment and analyzing the characteristics of the operating sounds of the equipment collected by the sound-collecting microphones. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-274805 Summary of the Invention [Problem to be solved by the invention]

[0004] The elevator abnormality detection device described above detects abnormalities based on the operating sounds of the equipment, so it can detect an abnormality in the equipment if the operating sounds change, but it cannot detect abnormalities if the operating sounds do not change even when an abnormality occurs in the equipment, or if an abnormality occurs in the walls of the hoistway, etc., separate from the abnormality in the equipment. Therefore, it cannot detect abnormalities in the hoistway, such as a state in which the doors do not close completely due to a malfunction of the equipment that drives the doors installed in the walls of the hoistway, or a state in which the hoistway walls have cracks or holes due to deterioration, etc., even if there is no change in the operating sounds.

[0005] In order to detect such abnormalities in the elevator shaft, workers must visually check during regular inspections. Since abnormalities in the elevator shaft cannot be detected during normal elevator operation, it is difficult to detect abnormalities in the elevator shaft early.

[0006] The present disclosure has been made to solve the above-mentioned problems, and provides an elevator abnormality detection device that can detect abnormalities occurring in the elevator shaft early, even when the abnormality in the elevator shaft does not change the operating noise of the equipment. [Means for solving the problem]

[0007] The elevator abnormality detection device disclosed herein includes an operation acquisition unit that acquires operation information related to the movement of the car as it moves through the elevator shaft; an airflow detection unit that is provided on at least one of the outside of the car and the elevator shaft and that detects airflow information indicating at least one of the airflow speed generated in the gap between the car and the wall of the elevator shaft when the car is operating and the airflow pressure generated in the elevator shaft ahead of the direction of movement of the car; an abnormality determination unit that compares the operation information and airflow information at the same time with a normal value that is previously linked to the operation information and is set as airflow information detected in an elevator shaft in a normal state, and determines that an abnormality has occurred in the elevator shaft if the airflow information is smaller than the normal value; and an alarm unit that alerts the user that an abnormality has occurred in the elevator shaft if the abnormality determination unit determines that an abnormality has occurred in the elevator shaft. [Effects of the Invention]

[0008] The elevator abnormality detection device according to the present disclosure determines that an abnormality has occurred in the elevator shaft and issues an alert when airflow information indicating at least one of the airflow velocity generated in the gap between the car and the wall of the elevator shaft when the car is operating and the airflow pressure generated in the elevator shaft ahead in the direction of movement of the car is smaller than a preset normal value. In this way, by using the airflow information to determine whether or not an abnormality has occurred in the elevator shaft and issuing an alert, an abnormality in the elevator shaft can be detected during normal elevator operation even if the operating noise of the equipment does not change due to the abnormality in the elevator shaft. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a configuration example of an elevator according to a first embodiment. [Figure 2] 1 is a diagram illustrating a configuration example of an elevator abnormality detection device according to a first embodiment. [Figure 3] 2 is a diagram illustrating an example of hardware of an abnormality determination unit according to the first embodiment. FIG. [Figure 4] 5 is a diagram showing an air current generated in a hoistway according to the first embodiment. FIG. [Figure 5] 1 is a diagram showing a configuration example of an elevator according to a first embodiment. [Figure 6] 1 is a diagram showing a configuration example of an elevator according to a first embodiment. [Figure 7] 3 is a diagram showing the flow of an elevator abnormality detection method according to the first embodiment. FIG. [Figure 8] FIG. 10 is a diagram illustrating a configuration example of an elevator abnormality detection device according to a second embodiment. [Figure 9] FIG. 10 is a diagram showing a configuration example of an elevator according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes embodiments in detail with reference to the accompanying drawings. Note that the embodiments described below are merely examples. The embodiments can be implemented in appropriate combination.

[0011] Embodiment 1 An abnormality detection device 10 for an elevator 100 and an abnormality detection method for the elevator 100 according to the first embodiment will be described with reference to Figs. 1 to 7. Fig. 1 shows a configuration example of an elevator 100 provided with an abnormality detection device 10 according to the first embodiment. Fig. 1 is a side view of the elevator 100, which includes a hoistway 1, a car 2, a rope 3, a weight 4, a hoist 5, and a door 6, and which has a landing 7 provided for each of the first to fourth floors. Note that the description will be of an elevator 100 that has stops from the first to fourth floors, but the invention is not limited to this and may be of any type as long as it has a plurality of stops.

[0012] One end of a rope 3 is connected to the upper end of the car 2, and the other end of the rope 3 is connected to a weight 4. The rope 3 is hung from a hoisting machine 5, which is controlled by a control panel (not shown), causing the car 2 to move through the elevator shaft 1 and stop at the designated floors.

[0013] Doors 6 are provided on the wall of the elevator shaft 1 at each stop floor so that passengers at the landing 7 can board the car 2 and passengers inside the car 2 can disembark at the landing 7. Doors 6 provided at the stop floor where the car 2 stops open, allowing passengers to get on and off, and to load and unload luggage between the inside of the car 2 and the landing 7. During normal operation of the elevator 100, doors 6 provided at stop floors where the car 2 is not stopped are completely closed, preventing objects, people, etc. from falling into the elevator shaft 1.

[0014] 2 shows an example of the configuration of the abnormality detection device 10 according to embodiment 1. The abnormality detection device 10 includes an action acquisition unit 11, an airflow detection unit 12, an abnormality determination unit 13, and a notification unit .

[0015] The operation acquisition unit 11 acquires operation information related to the movement of the car 2 moving in the elevator shaft 1. Examples of the operation information include the speed at which the car 2 moves, the position of the car 2 in the elevator shaft 1, the direction in which the car 2 moves, and an operation pattern indicating the stopping floor at which the car 2 is stopped and the stopping floor at which the car 2 will stop next. Here, the operation pattern indicates, for example, that the car 2 moves from the first floor to the third floor. The operation acquisition unit 11 may acquire the operation information from a control panel that controls the hoisting machine 5, or may acquire the operation information from an external device such as a sensor that measures the speed, position, etc. of the car 2 by providing such an external device.

[0016] Airflow detection unit 12 is provided at least either outside car 2 or in elevator shaft 1, and detects airflow information indicating at least one of the flow velocity of airflow occurring in the gap between car 2 and the wall of elevator shaft 1 when car 2 is in operation, and the pressure of airflow occurring in elevator shaft 1 ahead in the direction of movement of car 2. Examples of airflow detection unit 12 include speed sensor 8 and pressure sensor 9.

[0017] Speed ​​sensor 8 is provided on the outside of car 2 or in hoistway 1, and detects the velocity of airflow occurring in the gap between car 2 and the wall of hoistway 1 when car 2 is in operation. Specific examples of the locations where speed sensors 8 are provided are shown in FIG. 1. Speed ​​sensor 8a is provided on the outer side surface of car 2. Speed ​​sensors 8b, 8c, and 8d are provided on the wall of hoistway 1 between each floor stop. Speed ​​sensor 8b is provided on the wall of hoistway 1 between the first and second floors, speed sensor 8c is provided on the wall of hoistway 1 between the second and third floors, and speed sensor 8d is provided on the wall of hoistway 1 between the third and fourth floors. Speed ​​sensors 8b, 8c, and 8d provided on hoistway 1 can detect the velocity of airflow occurring in the gap between car 2 and the wall of hoistway 1 by detecting the velocity at the time car 2 passes near speed sensors 8b, 8c, and 8d.

[0018] Pressure sensor 9 is installed outside car 2 or in elevator shaft 1, and detects the pressure of the airflow occurring in elevator shaft 1 ahead in the direction of travel of car 2. Specific examples of the locations where pressure sensors 9 are installed are shown in Figure 1. Pressure sensor 9a is a pressure sensor 9 installed on the underside of the outside of car 2, and pressure sensor 9b is a pressure sensor 9 installed on the upper surface of the outside of car 2. Pressure sensor 9c is a pressure sensor 9 installed on the wall of elevator shaft 1 below the first floor, which is the lowest of the multiple stops. Pressure sensor 9d is a pressure sensor 9 installed on the wall of elevator shaft 1 above the fourth floor, which is the highest of the multiple stops.

[0019] The locations at which the speed sensor 8 and pressure sensor 9 constituting the airflow detection unit 12 are provided are not limited to those described above, and the speed sensor 8 may be any sensor capable of detecting the speed of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1 when the car 2 is in operation, and the pressure sensor 9 may be any sensor capable of detecting the pressure of the airflow occurring in the hoistway 1 ahead in the direction of movement of the car 2. For example, the pressure sensor 9 is not limited to being provided on the wall of the hoistway 1, and may be provided on the ceiling or floor.

[0020] The abnormality determination unit 13 determines whether or not an abnormality has occurred in the elevator shaft 1 using the airflow information detected by the airflow detection unit 12. The abnormality determination unit 13 is configured with a processor 110 and a storage device 111, as shown in FIG. 3, which is an example of hardware. Although not shown, the storage device 111 includes a volatile storage device such as a random access memory and a non-volatile auxiliary storage device such as a flash memory. Furthermore, a hard disk auxiliary storage device may be included instead of the flash memory. The processor 110 executes a program input from the storage device 111. In this case, the program is input to the processor 110 from the auxiliary storage device via the volatile storage device. Furthermore, the processor 110 may output data such as calculation results to the volatile storage device of the storage device 111, or may store the data in the auxiliary storage device via the volatile storage device.

[0021] The airflow that occurs in the elevator shaft 1 when the car 2 is in operation will be explained using Figure 4. Figure 4 shows the elevator shaft 1, the car 2, and the rope 3, and omits other components. When an abnormality occurs, such as a crack or hole in the wall of the elevator shaft 1, or when the door 6 installed in the elevator shaft 1 does not close completely, air will pass from the inside to the outside of the elevator shaft 1. The opening through which air passes in this way is indicated by X.

[0022] In Figure 4, car 2 is moving downward, and multiple arrows Y1, Y2, and Y3 indicate air currents generated in hoistway 1 by the downward moving car 2. Arrow Y1 indicates air current Y1 that is generated downward in hoistway 1 ahead of the direction of movement of car 2, and the flow velocity of this air current Y1 is designated V1. Arrow Y2 indicates air current Y2 that is generated upward in the gap between car 2 and the wall of hoistway 1, and the flow velocity of this air current Y2 is designated V2. Arrow Y3 indicates air current Y3 that flows out from hoistway 1 through opening X to the outside, and the flow velocity of this air current Y3 is designated V3.

[0023] Also, the cross-sectional area of ​​the flow path through which airflow Y1 passes, i.e., the horizontal cross-sectional area of ​​hoistway 1, is defined as A1, the cross-sectional area of ​​the flow path through which airflow Y2 passes, i.e., the horizontal cross-sectional area of ​​the gap between car 2 and the wall of hoistway 1, is defined as A2, and the cross-sectional area of ​​the flow path through which airflow Y3 passes, i.e., the area of ​​opening X, is defined as A3. Furthermore, the pressure of airflow Y1 that increases in hoistway 1 ahead of the direction of movement of car 2 as car 2 moves downward, i.e., the pressure that increases on the underside of car 2, is defined as Ps.

[0024] Since the sum of the kinetic energy, pressure energy, and potential energy of the airflow is conserved, the sums of the kinetic energy, pressure energy, and potential energy at the underside of car 2, the gap between car 2 and the wall of elevator shaft 1, and opening X are all equal and are expressed by the following equation (1).

[0025]

number

[0026] Here, the density of air is represented by ρ. Also, because air is very light, potential energy is ignored. Also, the static pressure on the top surface of car 2 and outside opening X is assumed to be equal to atmospheric pressure. From equation (1), the following equation (2) can be calculated.

[0027]

number

[0028] Since the flow velocities V2 and V3, which indicate the speed of the airflow, are positive values, the following equation (3) can be calculated from equation (2).

[0029]

number

[0030] From equation (2), the pressure Ps increasing on the bottom surface of the car 2 is expressed by the following equation (4).

[0031]

number

[0032] Furthermore, if the flow rates of airflows Y1, Y2, and Y3 are Q1, Q2, and Q3, respectively, the flow rate Q1 of airflow Y1 generated by the downward movement of car 2 is the sum of the flow rate Q2 of airflow Y2 generated upward in the gap between car 2 and the wall of hoistway 1 and the flow rate Q3 of airflow Y3 flowing out of hoistway 1 from opening X. Therefore, the relationship between the flow rates Q1, Q2, and Q3 is expressed by the following equation (5).

[0033]

number

[0034] The flow rates Q1, Q2, and Q3 of the airflows Y1, Y2, and Y3 are respectively calculated by multiplying the cross-sectional areas A1, A2, and A3 of the flow paths of the airflows Y1, Y2, and Y3 by the flow velocities V1, V2, and V3. Therefore, when the flow rates Q1, Q2, and Q3 are expressed in equation (5) using the cross-sectional areas A1, A2, and A3 and the flow velocities V1, V2, and V3, the following equation (6) is obtained.

[0035]

number

[0036] From equations (3) and (6), the following equation (7) is calculated.

[0037]

number

[0038] In equation (7), the cross-sectional areas A1 and A2 are constant values ​​because they are determined by the shapes of the hoistway 1 and the car 2. Furthermore, the flow velocity V1 is determined by the speed at which the car 2 moves. Meanwhile, when the hoistway 1 is in a normal state, the cross-sectional area A3 of the opening X is 0, but when an abnormality occurs in the hoistway 1, the cross-sectional area A3 of the opening X becomes a positive value greater than 0. Therefore, from equation (7), the flow velocity V2 of the airflow Y2 generated in the gap between the car 2 and the wall of the hoistway 1 changes depending on the speed at which the car 2 moves, and when an abnormality occurs in the hoistway 1, the flow velocity V2 of the airflow Y2 is smaller than the flow velocity V2 of the airflow Y2 generated when the car 2 moves at the same speed through the hoistway 1 in a normal state.

[0039] Furthermore, from equation (4), when the flow velocity V2 decreases due to the occurrence of an abnormality in the hoistway 1, the pressure Ps that increases on the underside of the car 2 due to the movement of the car 2 also decreases. Because the flow velocity V2 changes depending on the speed at which the car 2 moves, the pressure of the airflow Y1 that occurs in the hoistway 1 ahead of the direction of movement of the car 2 also changes depending on the speed at which the car 2 moves. Furthermore, when an abnormality occurs in the hoistway 1, the pressure of the airflow Y1 that occurs in the hoistway 1 ahead of the direction of movement of the car 2 is smaller than the pressure of the airflow Y1 that occurs when the car 2 moves at the same speed in the hoistway 1 in a normal state.

[0040] In this way, when an abnormality occurs in the hoistway 1, the flow velocity V2 of the airflow Y2 generated in the gap between the car 2 and the wall of the hoistway 1 and the pressure of the airflow Y1 generated in the hoistway 1 ahead of the direction of movement of the car 2 become smaller when compared with normal values, which are airflow information when the car 2 moves at the same speed in the hoistway 1 under normal conditions. Therefore, by detecting at least one of the flow velocity and pressure of these airflows, it is possible to determine whether an abnormality has occurred in the hoistway 1. Here, in order to compare the airflow information when the car 2 moves at the same speed in the hoistway 1 with the normal values, it is sufficient to use operation information related to the movement of the car 2. For example, the speed at which the car 2 moves may be used, or an operation pattern indicating which floors the car 2 moves to and from may be used.

[0041] Therefore, the abnormality judgment unit 13 compares the operation information and airflow information at the same time with a normal value that is previously set in association with the operation information as the airflow information detected in the elevator shaft 1 under normal conditions, and judges that an abnormality has occurred in the elevator shaft 1 if the airflow information is smaller than the normal value.

[0042] In order to determine whether or not an abnormality has occurred in the hoistway 1 during normal operation of the elevator 100, airflow detection unit 12 is used to detect airflow information in the hoistway 1 in a normal state in advance, such as during construction of the elevator 100, and this airflow information is linked to operation information and stored as a normal value. Specifically, for example, at the same time as detecting airflow information in the hoistway 1 in a normal state, operation information including the speed at which car 2 moves is obtained, and the airflow information in the hoistway 1 in a normal state is linked to the speed of car 2, set as a normal value, and stored.

[0043] Note that the operation information linked to the normal value is not limited to this, and may be anything related to the speed of car 2. For example, operation information including an operation pattern indicating which stopping floors car 2 moves to and from may be acquired, and airflow information in the elevator shaft 1 under normal conditions may be linked to the operation pattern of car 2 and stored as a normal value.

[0044] Furthermore, because the airflow information detected by the airflow detection unit 12 can fluctuate even when the speed of the car 2 is the same due to measurement errors, etc., the normal value may be set taking such measurement errors into consideration. For example, if an error of approximately 10% is allowed from the detected airflow information in the elevator shaft 1 in a normal state, a value that is approximately 90% of the value of the detected airflow information may be set as the lower limit of the normal value. As another example, multiple pieces of airflow information in the elevator shaft 1 in a normal state that are linked to the same operation information may be obtained, and the normal value may be set based on these multiple pieces of airflow information.

[0045] Specific examples of how the abnormality determination unit 13 determines whether or not an abnormality has occurred in the hoistway 1 will be described with reference to Figs. 5 and 6. The arrow in Fig. 5 indicates the direction in which the car 2 moves, and the car 2 is moving downward in the hoistway 1. At this time, the car 2 is located between the first and second floors. Furthermore, an abnormality has occurred in which the door 6 provided on the first floor is not completely closed, and this abnormality is causing air to pass from the inside of the hoistway 1 to the outside at the opening X1.

[0046] In this case, an abnormality in the elevator shaft 1 can be detected by using at least one of the airflow detection unit 12: a speed sensor 8a provided on the outer side of the car 2, a speed sensor 8b provided in the elevator shaft 1 between the first and second floors through which the car 2 passes, a pressure sensor 9a provided on the underside of the car 2 outside and in front of the direction of movement of the car 2, and a pressure sensor 9c provided in the elevator shaft 1 below the first floor and in front of the direction of movement of the car 2.

[0047] When an abnormality occurs in the hoistway 1, the flow velocity of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1, which is the airflow information detected by the speed sensors 8a and 8b, becomes smaller than the flow velocity when the car 2 moves at the same speed through the hoistway 1 in a normal state. Therefore, the abnormality determination unit 13 compares the flow velocity, which is the airflow information detected by the speed sensors 8a and 8b, with the operation information at the time this flow velocity is detected, with a normal value, and determines that an abnormality has occurred in the hoistway 1 if the detected flow velocity is smaller than the normal value.

[0048] Furthermore, when an abnormality occurs in the hoistway 1, the airflow pressure generated in the hoistway 1 ahead in the direction of movement of the car 2, which is the airflow information detected by the pressure sensors 9a and 9c, becomes smaller than the pressure when the car 2 moves at the same speed through the hoistway 1 in a normal state. Therefore, the abnormality determination unit 13 compares the pressure, which is the airflow information detected by the pressure sensors 9a and 9c, with the operation information at the time this pressure is detected, with a normal value, and determines that an abnormality has occurred in the hoistway 1 if the detected pressure is smaller than the normal value.

[0049] Next, a specific example will be described using Figure 6. The arrow in Figure 6 indicates the direction of movement of car 2, and car 2 is moving upward in elevator shaft 1. At this time, car 2 is located between the third and fourth floors. Furthermore, an abnormality has occurred in which door 6 installed on the fourth floor does not close completely, and this abnormality is causing air to pass from the inside of elevator shaft 1 to the outside at opening X2.

[0050] In this case, an abnormality in the elevator shaft 1 can be detected by using at least one of the airflow detection unit 12: a speed sensor 8a provided on the outer side of the car 2, a speed sensor 8d provided in the elevator shaft 1 between the third and fourth floors through which the car 2 passes, a pressure sensor 9b provided on the top surface outside the car 2, ahead of the direction of movement of the car 2, and a pressure sensor 9d provided above the fourth floor, ahead of the direction of movement of the car 2.

[0051] When an abnormality occurs in the hoistway 1, the flow velocity of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1, which is the airflow information detected by the speed sensors 8a and 8d, becomes smaller than the flow velocity when the car 2 moves at the same speed through the hoistway 1 in a normal state. Therefore, the abnormality determination unit 13 compares the flow velocity, which is the airflow information detected by the speed sensors 8a and 8d, with the operation information at the time this flow velocity is detected, with a normal value, and determines that an abnormality has occurred in the hoistway 1 if the detected flow velocity is smaller than the normal value.

[0052] Furthermore, when an abnormality occurs in the hoistway 1, the airflow pressure generated in the hoistway 1 ahead in the direction of movement of the car 2, which is the airflow information detected by the pressure sensors 9b and 9d, becomes smaller than the pressure when the car 2 moves at the same speed through the hoistway 1 in a normal state. Therefore, the abnormality determination unit 13 compares the pressure, which is the airflow information detected by the pressure sensors 9b and 9d, with the operation information at the time this pressure is detected, with a normal value, and determines that an abnormality has occurred in the hoistway 1 if the detected pressure is smaller than the normal value.

[0053] An example has been described in which it is determined that an abnormality has occurred in the elevator shaft 1 when an abnormality occurs in which the door 6 provided in the elevator shaft 1 does not close completely and air passes from the inside to the outside of the elevator shaft 1 at the openings X1 and X2.However, if there is a crack or hole in the wall of the elevator shaft 1, air will pass from the inside to the outside of the elevator shaft 1 through the crack or hole in the wall, so it can also be determined that an abnormality has occurred in the elevator shaft 1.

[0054] Furthermore, in order to determine whether or not an abnormality has occurred in the hoistway 1, it is sufficient to use airflow information indicating at least one of the airflow velocity occurring in the gap between the car 2 and the wall of the hoistway 1 when the car 2 is in operation and the airflow pressure occurring in the hoistway 1 ahead in the direction of movement of the car 2; however, compared to the airflow pressure, the airflow velocity fluctuates more widely when an abnormality occurs in the hoistway 1. Therefore, the airflow detection unit 12 detects airflow information indicating the airflow velocity occurring in the gap between the car 2 and the wall of the hoistway 1 when the car 2 is in operation, and the abnormality determination unit 13 determines whether or not an abnormality has occurred in the hoistway 1 using the flow velocity indicated by the airflow information, thereby making it possible to more accurately determine whether or not an abnormality has occurred in the hoistway 1.

[0055] Similarly, whether or not an abnormality has occurred in the elevator shaft 1 can be determined by using either the speed sensor 8 or the pressure sensor 9 as the airflow detection unit 12, but by using the speed sensor 8 as the airflow detection unit 12, the presence or absence of an abnormality in the elevator shaft 1 can be determined using the airflow velocity, which has a large range of fluctuation due to the occurrence of an abnormality, thereby making it possible to more accurately determine whether or not an abnormality has occurred in the elevator shaft 1.

[0056] In addition, an example has been described in which it is determined that an abnormality has occurred in the elevator shaft 1 when the airflow information detected by the airflow detection unit 12 is smaller than the normal value. However, when multiple airflow detection units 12 are used, it may also be determined that an abnormality has occurred in the elevator shaft 1 when all of the airflow information detected by the multiple airflow detection units 12 is smaller than the normal value.

[0057] Furthermore, the speed sensor 8 used as the airflow detection unit 12 is provided outside the car 2 or in the hoistway 1. However, when the speed sensor 8 is provided in the hoistway 1, the speed sensor 8 detects the flow velocity of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1 by detecting the flow velocity at the time when the car 2 passes near the speed sensor 8. In other words, in order to obtain airflow information used to determine whether or not an abnormality has occurred in the hoistway 1, it is necessary to detect the airflow information at the time when the car 2 passes near the speed sensor 8. Therefore, when the speed sensor 8 is provided in the hoistway 1, the speed sensor 8 can be provided near a frequently used stop floor or multiple speed sensors 8 can be provided in different positions, thereby increasing the number of times the airflow information used to determine whether or not an abnormality has occurred in the hoistway 1 is detected, and enabling an abnormality in the hoistway 1 to be detected earlier.

[0058] On the other hand, if the speed sensor 8 is provided outside the car 2, it can detect the flow speed of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1 while the car 2 is in operation, and obtain airflow information used to determine whether or not an abnormality has occurred in the hoistway 1. Therefore, by providing the speed sensor 8 used as the airflow detection unit 12 outside the car 2, it is possible to increase the number of times that the airflow information used to determine whether or not an abnormality has occurred in the hoistway 1 can be detected without increasing the number of speed sensors 8, and an abnormality occurring in the hoistway 1 can be detected earlier.

[0059] Furthermore, examples of operation information that can be linked to normal values ​​include the speed at which the car 2 moves or the operation pattern, and as shown in equations (4) and (7), the flow velocity and pressure indicated by the airflow information change depending on the speed at which the car 2 moves. Therefore, by using the speed at which the car 2 moves as operation information that can be linked to normal values, it is possible to reduce the number of normal values ​​that need to be obtained in advance to introduce the abnormality detection device 10, compared to when the information is linked to other information such as the operation pattern.

[0060] Therefore, the operation acquisition unit 11 acquires operation information including the speed at which the car 2 moves, and the abnormality judgment unit 13 compares the speed and airflow information at the same time with a normal value that is previously set in association with the speed, and if the airflow information is smaller than the normal value, it judges that an abnormality has occurred in the elevator shaft 1.This makes it possible to reduce the normal value that needs to be acquired in advance to introduce the abnormality detection device 10, thereby making it possible to reduce the equipment introduction cost for the abnormality detection device 10 for the elevator 100.

[0061] Furthermore, when car 2 moves in hoistway 1, it accelerates from a stop position, moves at a constant speed, and then decelerates and stops. Here, compared to when car 2 is accelerating or decelerating, the airflow generated in hoistway 1 is stable when car 2 is moving at a constant speed. Therefore, by using the airflow information when the speed of car 2 indicated by the operating status is a first speed indicating that car 2 is moving at a constant speed as the airflow information used by abnormality determination unit 13 when determining whether or not an abnormality has occurred in hoistway 1, it is possible to more accurately determine whether or not an abnormality has occurred in hoistway 1.

[0062] In other words, the airflow detection unit 12 detects airflow information when the speed of the car 2 indicated by the operating status is a first speed, which indicates that the car 2 is moving at a constant speed, and the abnormality judgment unit 13 judges that an abnormality has occurred in the elevator shaft 1 if the airflow information detected when the speed indicated by the operating information is the first speed is smaller than a normal value set in association with the first speed, thereby making it possible to more accurately judge whether or not an abnormality has occurred in the elevator shaft 1.

[0063] Returning to the explanation of Fig. 2, when the abnormality determination unit 13 determines that an abnormality has occurred in the hoistway 1, the notification unit 14 notifies the user that an abnormality has occurred in the hoistway 1. The notification unit 14 is, for example, a display unit or a speaker provided in a management device for managing the elevator 100 or in a management room, and notifies the user of the elevator 100 that an abnormality has occurred in the hoistway 1 by displaying a message or sounding an alarm. However, the notification unit 14 is not limited to this, and may be any unit that notifies the user that an abnormality has occurred in the hoistway 1.

[0064] In this way, the abnormality determination unit 13 determines whether or not an abnormality has occurred in the hoistway 1 using the airflow information, and the alarm unit 14 notifies that an abnormality has occurred in the hoistway 1, so that an abnormality that has occurred in the hoistway 1 can be detected during normal operation of the elevator 100, even if the operating sound of the equipment does not change due to the abnormality that has occurred in the hoistway 1. Therefore, since an abnormality that has occurred in the hoistway 1 can be detected during normal operation of the elevator 100, not just when a periodic inspection of the elevator 100 is performed, an abnormality can be detected between the time an abnormality occurs in the hoistway 1 and the time the periodic inspection is performed, and an abnormality that has occurred in the hoistway 1 can be detected early.

[0065] Next, the flow of the abnormality detection method in the abnormality detection device 10 for the elevator 100 according to the first embodiment will be described with reference to Fig. 7. Fig. 7 is a flowchart showing the flow of the abnormality detection method for the elevator 100 according to the first embodiment.

[0066] In step S01, the operation acquisition unit 11 acquires operation information related to the movement of the car 2 moving in the hoistway 1. In step S02, the airflow detection unit 12 provided on at least one of the outside of the car 2 and the hoistway 1 detects airflow information indicating at least one of the flow velocity of the airflow occurring in the gap between the car 2 and the wall of the hoistway 1 when the car 2 is operating and the pressure of the airflow occurring in the hoistway 1 ahead in the direction of movement of the car 2. Here, in step S02, the airflow detection unit 12 may detect the airflow information based on the operation information acquired by the operation acquisition unit 11. Note that the order of steps S01 and S02 is not limited to that shown in FIG. 7 , and for example, the acquisition of the operation information in step S01 and the detection of the airflow information in step S02 may be performed simultaneously.

[0067] In step S03, the operation information acquired in step S01 and the airflow information detected in step S02 are used to determine whether or not an abnormality has occurred in the hoistway 1. Specifically, the abnormality determination unit 13 compares the operation information and airflow information at the same time with a normal value that is previously associated with the operation information and set as airflow information detected in the hoistway 1 in a normal state, and determines that an abnormality has occurred in the hoistway 1 if the airflow information is smaller than the normal value. If it is determined in step S03 that the airflow information is equal to or greater than the normal value, the process returns to step S01, and the operation acquisition unit 11 continues to acquire operation information and the airflow detection unit 12 continues to detect airflow information. On the other hand, if the airflow information is smaller than the normal value and it is determined that an abnormality has occurred in the hoistway 1, the process proceeds to step S04.

[0068] In step S04, the notification unit 14 notifies the manager of the elevator 100 that an abnormality has occurred in the hoistway 1. For example, the notification unit 14 notifies the manager of the elevator 100 that an abnormality has occurred in the hoistway 1 by displaying or sounding an image.

[0069] As described above, the abnormality detection device 10 of the elevator 100 according to the first embodiment includes: an operation acquisition unit 11 that acquires operation information related to the movement of the car 2 traveling through the elevator shaft 1; an airflow detection unit 12 that is provided at least one of the outside of the car 2 and the elevator shaft 1 and that detects airflow information indicating at least one of the airflow velocity generated in the gap between the car 2 and the wall of the elevator shaft 1 when the car 2 is operating and the airflow pressure generated in the elevator shaft 1 ahead of the direction of movement of the car 2; an abnormality determination unit 13 that compares the operation information and the airflow information at the same time with a normal value that is pre-set and associated with the operation information as airflow information detected in the elevator shaft 1 under normal conditions and determines that an abnormality has occurred in the elevator shaft 1 if the airflow information is smaller than the normal value; and an alarm unit 14 that notifies the user of the abnormality in the elevator shaft 1 if the abnormality determination unit 13 determines that an abnormality has occurred in the elevator shaft 1. This configuration allows the presence or absence of an abnormality in the elevator shaft 1 to be determined and notified using the airflow information. As a result, even if the operating sound of the equipment does not change due to an abnormality occurring in the hoistway 1, it is possible to detect an abnormality occurring in the hoistway 1 during normal operation of the elevator 100.

[0070] Furthermore, in the first embodiment, the operation acquisition unit 11 acquires operation information including the speed at which the car 2 moves, and the abnormality determination unit 13 compares the speed and airflow information at the same time with a normal value previously set in association with the speed, and determines that an abnormality has occurred in the hoistway 1 if the airflow information is smaller than the normal value. With this configuration, by using the speed at which the car 2 moves as operation information associated with the normal value, it is possible to reduce the normal value that needs to be acquired in advance in order to install the abnormality detection device 10, and it is possible to reduce the installation costs for the abnormality detection device 10 in the elevator 100.

[0071] Furthermore, in the first embodiment, the airflow detection unit 12 detects airflow information when the speed indicated by the operation information is a first speed indicating that the car 2 is moving at a constant speed, and the abnormality determination unit 13 determines that an abnormality has occurred in the hoistway 1 if the airflow information detected when the speed indicated by the operation information is the first speed is smaller than a normal value set in association with the first speed. With this configuration, the presence or absence of an abnormality is determined using airflow information when the car 2 is moving at a constant speed and the airflow generated in the hoistway 1 is stable, so that the presence or absence of an abnormality in the hoistway 1 can be determined with greater accuracy.

[0072] Embodiment 2 An abnormality detection device 10a for an elevator 100 and an abnormality detection method for an elevator 100 according to a second embodiment will be described with reference to Figures 8 and 9. In the second embodiment, the same components as those in the first embodiment are given the same reference numerals, and the configurations different from those in the first embodiment will be mainly described.

[0073] In embodiment 1, an example was described in which the abnormality detection device 10 of the elevator 100 determines whether or not an abnormality has occurred in the elevator shaft 1. In embodiment 2, an example is described in which, when the abnormality detection device 10a of the elevator 100 detects an abnormality that has occurred in the elevator shaft 1, the range in which the abnormality has occurred in the elevator shaft 1 is determined.

[0074] As shown in equations (4) and (7), in Fig. 4, when an abnormality occurs ahead in the direction of movement of car 2, air passes from the inside of hoistway 1 to the outside through opening X, causing the flow velocity and pressure indicated by the airflow information to become smaller than normal. Therefore, when the airflow information is smaller than normal and it is determined that an abnormality has occurred in hoistway 1, it can be determined that this abnormality has occurred ahead in the direction of movement of car 2.

[0075] 8 is a diagram showing an example of the configuration of an abnormality detection device 10a for an elevator 100 according to a second embodiment. An operation acquisition unit 11a acquires operation information including the position and movement direction of the car 2 in the elevator shaft 1. When the airflow information is smaller than a normal value, an abnormality determination unit 13a determines that an abnormality has occurred in the elevator shaft 1 ahead of the detection position in the detection movement direction, based on the detection position, which is the position indicated by the operation information at the same time as the airflow information, and the detection movement direction, which is the movement direction indicated by the operation information at the same time as the airflow information. When the abnormality determination unit 13 determines that an abnormality has occurred in the elevator shaft 1, an alarm unit 14a notifies that an abnormality has occurred in the elevator shaft 1 ahead of the detection position in the detection movement direction.

[0076] A specific example will be described using Figure 9. The arrows in Figures 9(a) and 9(b) each indicate the direction of movement of car 2, with car 2 moving downward in elevator shaft 1. Assume that car 2, which is located between the second and third floors shown in Figure 9(a), moves downward, causing car 2 to move to between the first and second floors shown in Figure 9(b). Also assume that an abnormality has occurred in which door 6 on the first floor is not completely closed, and that this abnormality is causing air to pass from the inside to the outside of elevator shaft 1 at opening X1.

[0077] In Figure 9(a), the airflow detection unit 12 can detect an abnormality in the elevator shaft 1 by using at least one of the following: a speed sensor 8a provided on the outer side of the car 2; a speed sensor 8c provided in the elevator shaft 1 between the second and third floors through which the car 2 passes; a pressure sensor 9a provided on the underside of the car 2 outside and in front of the direction of movement of the car 2; and a pressure sensor 9c provided in the elevator shaft 1 below the first floor and in front of the direction of movement of the car 2.

[0078] Here, the position indicated by the operation information at the same time as the airflow information detected by the airflow detection unit 12 is defined as the position at the time of detection, and the movement direction indicated by the operation information at the same time as the airflow information detected by the airflow detection unit 12 is defined as the movement direction at the time of detection. If airflow information is detected in the state of car 2 shown in Figure 9(a), the position at the time of detection is between the second and third floors, and the movement direction at the time of detection is downward.

[0079] When the airflow information detected by airflow detection unit 12 is smaller than the normal value and an abnormality is detected, this abnormality occurs forward in the direction of movement of car 2, and therefore it can be determined that the abnormality has occurred below the detection position of car 2 in Figure 9(a). Therefore, when the airflow information detected by airflow detection unit 12 is smaller than the normal value, abnormality determination unit 13a determines, based on the detection position and detection movement direction, that an abnormality has occurred in hoistway 1 forward of the detection position in the detection movement direction. Then, notification unit 14a notifies that an abnormality has occurred in hoistway 1 forward of the detection position in the detection movement direction.

[0080] In this way, the operation acquisition unit 11a acquires operation information including the position and movement direction of the car 2 in the elevator shaft 1, the abnormality determination unit 13a determines the range in which the abnormality has occurred based on the position at the time of detection and the movement direction at the time of detection, and the notification unit 14a notifies the range in which the abnormality has occurred, making it easier for the manager of the elevator 100 to identify the position in the elevator shaft 1 in which the abnormality has occurred.

[0081] Furthermore, by comparing the airflow information detected at a plurality of detection points provided in the elevator shaft 1 along the moving direction of the car 2 with normal values, it is possible to further narrow down the range in which an abnormality has occurred in the elevator shaft 1. Here, the position through which the car 2 passes shown in Fig. 9(a) is defined as a first point, and the position through which the car 2 passes shown in Fig. 9(b) is defined as a second point.

[0082] 9(b), airflow detection unit 12 that acquires airflow information to detect the presence or absence of an abnormality in elevator shaft 1 is at least one of speed sensor 8a provided on the outer side surface of car 2, speed sensor 8b provided in elevator shaft 1 between the first and second floors through which car 2 passes, pressure sensor 9a provided on the underside of elevator shaft 1, outside car 2, ahead of the direction of movement of car 2, and pressure sensor 9c provided in elevator shaft 1, below the first floor, ahead of the direction of movement of car 2. In this case, because no abnormality has occurred ahead of the direction of movement in which car 2 moves, i.e., below car 2 in FIG. 9(b), the airflow information detected by these airflow detection units 12 is equal to or greater than the normal value, and it is determined that no abnormality has occurred.

[0083] In Fig. 9(a), the airflow information detected when car 2 passes through the first point is smaller than the normal value, so it is determined that an abnormality has occurred at the position where car 2 passes shown in Fig. 9(a), i.e., below the first point. Also, in Fig. 9(b), the airflow information detected when car 2 passes through the second point is greater than the normal value, so it is determined that no abnormality has occurred at the position where car 2 passes shown in Fig. 9(b), i.e., below the second point. Therefore, although an abnormality has occurred below the first point shown in Fig. 9(a), no abnormality has occurred below the second point shown in Fig. 9(b), so it can be determined that an abnormality has occurred in the elevator shaft 1 between the first and second points.

[0084] In this way, when car 2 passes through a first point and a second point that are adjacent in the direction of movement in hoistway 1, airflow detection unit 12 detects airflow information, and if the airflow information detected when car 2 passes through the first point is smaller than a normal value and the airflow information detected when car 2 passes through the second point in the same direction of movement as when it passed the first point is equal to or greater than the normal value, abnormality determination unit 13a determines that an abnormality has occurred between the first and second points in hoistway 1, thereby further narrowing down the range in which the abnormality has occurred. In addition, by alarm unit 14a notifying that an abnormality has occurred between the first and second points in hoistway 1, the manager of elevator 100 can more easily identify the location in hoistway 1 where the abnormality has occurred.

[0085] Here, we have described an example in which airflow information detected at two detection points, point 1 and point 2, is used to identify the area in which an abnormality has occurred in the elevator shaft 1, but airflow information detected at more detection points may also be used.

[0086] For example, it is possible to use airflow information detected at a plurality of detection points provided between adjacent stopping floors among a plurality of stopping floors at which the car 2 stops in the elevator shaft 1. In this way, by providing a plurality of detection points between the stopping floors, the range in which the abnormality is occurring can be further narrowed down.

[0087] In this case, airflow detection unit 12 detects airflow information at a plurality of detection points, including a first point and a second point, which are provided between adjacent stopping floors among a plurality of stopping floors at which car 2 stops in hoistway 1. Furthermore, abnormality determination unit 13a compares, for each of the airflow information detected at the plurality of detection points, the airflow information detected when car 2 passed the detection point in the same moving direction with a normal value, identifies a first point among the plurality of detection points where the airflow information is smaller than the normal value, and a second point adjacent to the first point where the airflow information is larger than the normal value, and determines that an abnormality has occurred in hoistway 1 between the first point and the second point. Then, notification unit 14a notifies that an abnormality has occurred between the first point and the second point in hoistway 1, thereby enabling the manager of elevator 100 to more easily identify the location where the abnormality has occurred in hoistway 1.

[0088] Although the example has been described in which airflow detection unit 12 detects airflow information at multiple detection points in order to identify the range in which an abnormality has occurred in elevator shaft 1, airflow detection unit 12 may also be configured to constantly acquire airflow information. In this case, abnormality determination unit 13a may determine the presence or absence of an abnormality using only necessary airflow information from the detected airflow information, or may constantly compare the airflow information with a normal value to determine the presence or absence of an abnormality.

[0089] Furthermore, although the case where the car 2 moves downward has been described in FIG. 9, the range in which an abnormality has occurred in the elevator shaft 1 can also be identified in the case where the car 2 moves upward.

[0090] As described above, in the abnormality detection device 10a for the elevator 100 according to the second embodiment, the operation acquisition unit 11a acquires operation information including the position and movement direction of the car 2 in the elevator shaft 1, and when the airflow information is smaller than the normal value, the abnormality determination unit 13a determines that an abnormality has occurred in the elevator shaft 1 further forward in the movement direction at the time of detection than the detection time position based on the detection time position, which is the position indicated by the operation information at the same time as the airflow information, and the detection time movement direction, which is the movement direction indicated by the operation information at the same time as the airflow information, and the notification unit 14a notifies the user that an abnormality has occurred in the elevator shaft 1 further forward in the movement direction at the time of detection than the detection time position. With this configuration, when it is determined that an abnormality has occurred in the elevator shaft 1, the notification unit 14a notifies the user that an abnormality has occurred in the elevator shaft 1 further forward in the movement direction at the time of detection than the detection time position, thereby making it easier for the manager of the elevator 100 to identify the position where the abnormality has occurred in the elevator shaft 1.

[0091] Furthermore, in the second embodiment, airflow detection unit 12 detects airflow information when car 2 passes through a first point and a second point adjacent to each other along the direction of travel in elevator shaft 1. If the airflow information detected when car 2 passes through the first point is lower than a normal value and the airflow information detected when car 2 passes through the second point in the same direction of travel as when car 2 passed through the first point is equal to or higher than the normal value, abnormality determination unit 13a determines that an abnormality has occurred between the first point and the second point in elevator shaft 1, and alarm unit 14a notifies the user that an abnormality has occurred between the first point and the second point in elevator shaft 1. With this configuration, if an abnormality has been determined to have occurred in elevator shaft 1, the alarm unit 14a notifies the user that an abnormality has occurred between the first point and the second point in elevator shaft 1, thereby further narrowing down the range in which the abnormality has occurred in elevator shaft 1. As a result, the elevator manager of elevator 100 can more easily identify the location in elevator shaft 1 where the abnormality has occurred.

[0092] Furthermore, in the second embodiment, the airflow detection unit 12 detects airflow information at a plurality of detection points, including a first point and a second point, which are provided between adjacent stops among a plurality of stops at which the car 2 stops in the elevator shaft 1. The plurality of detection points includes a first point and a second point. The abnormality determination unit 13a compares, for each of the airflow information detected at the plurality of detection points, the airflow information detected when the car 2 passes the detection point in the same moving direction with a normal value. The abnormality determination unit 13a identifies a first point among the plurality of detection points where the airflow information is smaller than the normal value and a second point adjacent to the first point where the airflow information is larger than the normal value, and determines that an abnormality has occurred between the first point and the second point in the elevator shaft 1. With this configuration, the range in which the abnormality has occurred is identified using the airflow information detected at the plurality of detection points provided between adjacent stops, thereby further narrowing down the range in which the abnormality has occurred in the elevator shaft 1. As a result, the elevator manager of the elevator 100 can more easily identify the location in the elevator shaft 1 where the abnormality has occurred.

[0093] While the present disclosure describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not exemplified are conceivable within the scope of the technology disclosed in this specification, including, for example, cases where at least one component is modified, added, or omitted, and cases where at least one component is extracted and combined with components of another embodiment.

[0094] Various aspects of the present disclosure are summarized below as appendices.

[0095] (Appendix 1) a motion acquisition unit that acquires motion information related to the motion of a car moving through the elevator shaft; an airflow detection unit that is provided on at least one of the outside of the car and the elevator shaft and that detects airflow information that indicates at least one of the flow velocity of airflow generated in a gap between the car and a wall of the elevator shaft when the car is in operation and the pressure of airflow generated in the elevator shaft ahead in the direction of movement of the car; an abnormality determination unit that compares the operation information and the airflow information at the same time with a normal value that is set in advance in association with the operation information as the airflow information detected in the elevator shaft under normal conditions, and determines that an abnormality has occurred in the elevator shaft when the airflow information is smaller than the normal value; An elevator abnormality detection device comprising: an alarm unit that, when the abnormality judgment unit determines that an abnormality has occurred in the elevator shaft, issues an alarm that an abnormality has occurred in the elevator shaft. (Appendix 2) The operation acquisition unit acquires the operation information including a speed at which the car moves, The elevator abnormality detection device described in Appendix 1, wherein the abnormality judgment unit compares the speed and the airflow information at the same time with the normal value that is previously set in association with the speed, and judges that an abnormality has occurred in the elevator shaft if the airflow information is smaller than the normal value. (Appendix 3) the airflow detection unit detects the airflow information when the speed indicated by the operation information is a first speed indicating that the car is moving at a constant speed; The elevator abnormality detection device described in Appendix 2, wherein the abnormality judgment unit judges that an abnormality has occurred in the elevator shaft if the airflow information detected when the speed indicated by the operation information is the first speed is smaller than the normal value set in association with the first speed. (Appendix 4) the operation acquisition unit acquires the operation information including a position of the car in the elevator shaft and the moving direction, When the airflow information is smaller than the normal value, the abnormality determination unit determines that an abnormality has occurred in the elevator shaft forward of the detection time position in the detection time movement direction, based on a detection time position which is the position indicated by the operation information at the same time as the airflow information and a detection time movement direction which is the movement direction indicated by the operation information at the same time as the airflow information, An elevator abnormality detection device as described in any one of Appendices 1 to 3, wherein the alarm unit notifies that an abnormality has occurred in the elevator shaft ahead of the detection position in the direction of movement at the time of detection. (Appendix 5) the airflow detection unit detects the airflow information when the car passes through a first point and a second point that are adjacent to each other along the movement direction in the elevator shaft; the abnormality determination unit determines that an abnormality has occurred in the elevator shaft between the first point and the second point when the airflow information detected when the car passed the first point is smaller than the normal value and the airflow information detected when the car passed the second point in the same moving direction as when the car passed the first point is equal to or greater than the normal value; An elevator abnormality detection device as described in any one of Appendices 1 to 4, wherein the alarm unit notifies that an abnormality has occurred in the elevator shaft between the first point and the second point. (Appendix 6) the airflow detection unit detects the airflow information at a plurality of detection points provided between adjacent stop floors among a plurality of stop floors at which the car stops in the elevator shaft, the detection points including the first point and the second point; The elevator abnormality detection device described in Appendix 5, wherein the abnormality judgment unit compares, for each of the air flow information detected at a plurality of the detection points, the air flow information detected when the car passed the detection point in the same moving direction with the normal value, identifies, among the plurality of the detection points, the first point where the air flow information is smaller than the normal value, and the second point where the air flow information is larger than the normal value and adjacent to the first point, and judges that an abnormality has occurred in the elevator shaft between the first point and the second point. (Appendix 7) obtaining operational information relating to the movement of the car through the hoistway; a step of detecting airflow information provided on at least one of the outside of the car and the hoistway, the airflow information indicating at least one of the flow velocity of airflow occurring in a gap between the car and a wall of the hoistway when the car is in operation and the pressure of airflow occurring in the hoistway ahead in the direction of movement of the car; a step of comparing the operation information and the airflow information at the same time with a normal value previously set in association with the operation information as the airflow information detected in the elevator shaft under normal conditions, and determining that an abnormality has occurred in the elevator shaft when the airflow information is smaller than the normal value; and when the abnormality determination unit determines that an abnormality has occurred in the elevator shaft, notifying the user that an abnormality has occurred in the elevator shaft. [Explanation of symbols]

[0096] 1 elevator shaft, 2 car, 3 rope, 4 weight, 5 hoist, 6 door, 7 landing, 8, 8a, 8b, 8c, 8d speed sensor, 9, 9a, 9b, 9c, 9d pressure sensor, 10 abnormality detection device, 11, 11a operation acquisition unit, 12 airflow detection unit, 13, 13a abnormality determination unit, 14, 14a notification unit, 100 elevator, 110 processor, 111 storage device

Claims

1. a motion acquisition unit that acquires motion information related to the motion of a car moving through the elevator shaft; an airflow detection unit that is provided on at least one of the outside of the car and the elevator shaft and that detects airflow information that indicates at least one of the flow velocity of airflow generated in a gap between the car and a wall of the elevator shaft when the car is in operation and the pressure of airflow generated in the elevator shaft ahead in the direction of movement of the car; an abnormality determination unit that compares the operation information and the airflow information at the same time with a normal value that is set in advance in association with the operation information as the airflow information detected in the elevator shaft under normal conditions, and determines that an abnormality has occurred in the elevator shaft when the airflow information is smaller than the normal value; An elevator abnormality detection device comprising: an alarm unit that, when the abnormality judgment unit determines that an abnormality has occurred in the elevator shaft, issues an alarm that an abnormality has occurred in the elevator shaft.

2. The operation acquisition unit acquires the operation information including a speed at which the car moves, 2. The elevator abnormality detection device according to claim 1, wherein the abnormality determination unit compares the speed and the airflow information at the same time with a normal value that is previously set in association with the speed, and determines that an abnormality has occurred in the elevator shaft if the airflow information is smaller than the normal value.

3. the airflow detection unit detects the airflow information when the speed indicated by the operation information is a first speed indicating that the car is moving at a constant speed; 3. The elevator abnormality detection device according to claim 2, wherein the abnormality determination unit determines that an abnormality has occurred in the elevator shaft if the airflow information detected when the speed indicated by the operation information is the first speed is smaller than the normal value set in association with the first speed.

4. the operation acquisition unit acquires the operation information including a position of the car in the elevator shaft and the moving direction, When the airflow information is smaller than the normal value, the abnormality determination unit determines that an abnormality has occurred in the elevator shaft forward of the detection time position in the detection time movement direction, based on a detection time position which is the position indicated by the operation information at the same time as the airflow information and a detection time movement direction which is the movement direction indicated by the operation information at the same time as the airflow information, The elevator abnormality detection device according to any one of claims 1 to 3, wherein the notification unit notifies that an abnormality has occurred in the elevator shaft ahead of the detection position in the direction of movement at the time of detection.

5. the airflow detection unit detects the airflow information when the car passes through a first point and a second point that are adjacent to each other along the movement direction in the elevator shaft; the abnormality determination unit determines that an abnormality has occurred in the elevator shaft between the first point and the second point when the airflow information detected when the car passed the first point is smaller than the normal value and the airflow information detected when the car passed the second point in the same moving direction as when the car passed the first point is equal to or greater than the normal value; The elevator abnormality detection device according to claim 4 , wherein the notification unit notifies that an abnormality has occurred in the elevator shaft between the first point and the second point.

6. the airflow detection unit detects the airflow information at a plurality of detection points provided between adjacent stop floors among a plurality of stop floors at which the car stops in the elevator shaft, the detection points including the first point and the second point; 6. The elevator abnormality detection device according to claim 5, wherein the abnormality determination unit compares, for each of the airflow information detected at a plurality of the detection points, the airflow information detected when the car passed the detection point in the same moving direction with the normal value, identifies, among the plurality of the detection points, the first point where the airflow information is smaller than the normal value, and the second point where the airflow information is larger than the normal value and adjacent to the first point, and determines that an abnormality has occurred in the elevator shaft between the first point and the second point.

7. obtaining operational information relating to the movement of the car through the hoistway; a step of detecting airflow information provided on at least one of the outside of the car and the hoistway, the airflow information indicating at least one of the flow velocity of airflow occurring in a gap between the car and a wall of the hoistway when the car is in operation and the pressure of airflow occurring in the hoistway ahead in the direction of movement of the car; a step of comparing the operation information and the airflow information at the same time with a normal value previously set in association with the operation information as the airflow information detected in the elevator shaft under normal conditions, and determining that an abnormality has occurred in the elevator shaft when the airflow information is smaller than the normal value; and when it is determined that an abnormality has occurred in the elevator shaft, notifying the user that an abnormality has occurred in the elevator shaft.

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