Wire rope inspection device

Abstract

Provided is a wire rope inspection device. The wire rope inspection device includes a force application unit that applies a force in a direction approaching a wire rope to a detection unit by an elastic force until the detection unit reaches an inspection position at which the detection unit is disposed when an inspection operation for inspecting the wire rope is performed, and a drive unit that moves the detection unit in a direction away from the wire rope to a normal operation position at which the detection unit is disposed when a normal operation is performed.

Description

Technical Field

[0001] This invention relates to a wire rope inspection device. Background Technology

[0002] Previously, a wire rope inspection device was known that uses a detection coil to detect changes in the magnetic flux of a wire rope. Such a device is disclosed, for example, in International Publication No. 2019 / 171667.

[0003] International Publication No. 2019 / 171667 discloses a wire rope inspection device (magnetic body inspection device) comprising an excitation unit for the wire rope (magnetic body) and a detection coil for detecting the magnetic flux (magnetic field) of the wire rope. In the wire rope inspection device described in International Publication No. 2019 / 171667, the detection coil is configured to detect changes in the magnetic flux of the wire rope caused by the magnetic flux applied by the excitation unit.

[0004] While not described in International Publication No. 2019 / 171667, it is considered that in wire rope inspection devices, during normal operation without inspection, the detection coil is moved away from the wire rope to prevent it from contacting the detection coil due to vibration. During inspection operation, the detection coil is moved closer to the wire rope for high-precision inspection. In this case, when the detection coil is placed inside the housing of the device using the wire rope to be inspected, it is considered that when the detection coil is brought closer to the wire rope, it can be moved remotely by using a driving force such as a motor.

[0005] However, when using a motor or similar driving force to position the detection coil at the inspection position for inspecting the wire rope, controlling the movement of the detection coil requires controlling the motor's drive. In this case, to obtain detection results with high accuracy using the detection coil, it is necessary to bring the detection coil as close to the wire rope as possible; therefore, precise control of the detection coil's movement is required. Consequently, it is believed that the processing burden of control processing increases due to the precise control of the detection coil's movement. Therefore, it is desirable to be able to easily position the detection coil (detection unit) as close to the wire rope as possible when moving the detection coil (detection unit) that detects the magnetic flux of the wire rope via remote operation. Summary of the Invention

[0006] The present invention was made to solve the problems described above. One object of the present invention is to provide a wire rope inspection device that can easily configure the detection part to be as close as possible to the wire rope when the detection part for detecting the magnetic flux of the wire rope is moved by remote operation.

[0007] A wire rope inspection device according to one aspect of the present invention includes: an excitation unit that applies magnetic flux to a wire rope to be inspected; a detection unit that detects the magnetic flux of the wire rope to which the excitation unit applies magnetic flux; a force application unit that applies a force to the detection unit in a direction approaching the wire rope using elastic force until the detection unit reaches an inspection position, the inspection position being a position for arranging the detection unit during inspection operation of the wire rope inspection; and a drive unit that moves the detection unit in a direction away from the wire rope to a normal operating position for arranging the detection unit during normal operation.

[0008] As described above, in one aspect of the wire rope inspection apparatus of the present invention, a force-applying part is provided to apply a force to a detection unit in a direction approaching the wire rope using elastic force until the detection unit reaches the inspection position for positioning the detection unit during inspection operation to inspect the wire rope. Therefore, by applying force using the force-applying part, the detection unit can be moved to the inspection position for inspection. Thus, the detection unit can be positioned as close to the wire rope as possible by applying force using the elastic force of the force-applying part, rather than by controlling the movement of the detection unit. Therefore, the detection unit can be positioned as close to the wire rope as possible without precise control of its movement. As a result, the processing burden of the control process can be suppressed, and the detection unit can be easily positioned as close to the wire rope as possible even when the detection unit for detecting the magnetic flux of the wire rope is moved remotely. Furthermore, during normal operation, precise control of the detection unit's positioning is not required. Therefore, by using the drive unit to move the detection unit away from the wire rope against the elastic force (acting force) of the force-applying unit, it can be moved to the normal operating position for configuring the detection unit during normal operation, thereby making it easy to configure the detection unit in the normal operating position. Attached Figure Description

[0009] Figure 1 This is a schematic diagram showing the overall structure of the wire rope inspection system according to the first embodiment.

[0010] Figure 2 This is a block diagram showing the overall structure of the wire rope inspection system according to the first embodiment.

[0011] Figure 3 This is a schematic diagram showing the structure of the wire rope inspection device according to the first embodiment.

[0012] Figure 4 This diagram shows the configuration of the magnetic field application section, excitation section, and detection section of the wire rope inspection device according to the first embodiment.

[0013] Figure 5 This is a schematic diagram illustrating the structure of the detection coil in the detection unit.

[0014] Figure 6This is a diagram showing the structure of the drive mechanism according to the first embodiment.

[0015] Figure 7 This is a diagram showing the configuration of the detection unit and drive mechanism of the wire rope inspection device according to the first embodiment during normal operation.

[0016] Figure 8 This diagram shows the configuration of the detection unit and drive mechanism of the wire rope inspection device according to the first embodiment during inspection operation.

[0017] Figure 9 This is a block diagram showing the overall structure of the wire rope inspection system according to the second embodiment.

[0018] Figure 10 This is a diagram showing the structure of the wire rope inspection device according to the second embodiment.

[0019] Figure 11 This is a diagram showing the configuration of the detection unit and drive mechanism of the wire rope inspection device according to the second embodiment during normal operation.

[0020] Figure 12 This is a diagram showing the configuration of the detection unit and drive mechanism of the wire rope inspection device according to the second embodiment during inspection operation.

[0021] Figure 13 (A) is a diagram used to illustrate the one-way clutch in the second embodiment and is a view taken from the X1 direction side.

[0022] Figure 13 (B) is a diagram illustrating the one-way clutch in the second embodiment and is along... Figure 13 A cross-sectional view of line 400-400 of (A).

[0023] Figure 14 This is a block diagram showing the overall structure of the wire rope inspection system according to the third embodiment.

[0024] Figure 15 This diagram schematically illustrates the configuration of the detection unit and drive mechanism of the wire rope inspection device according to the third embodiment during inspection operation.

[0025] Figure 16 This diagram illustrates the movement of the probe through contact with a foreign object. Detailed Implementation

[0026] The embodiments embodied in the present invention will now be described with reference to the accompanying drawings.

[0027] [First Implementation Method]

[0028] First, refer to Figures 1 to 8The structure of the wire rope inspection system 100 and wire rope inspection device 101 according to the first embodiment of the present invention will be described below. Furthermore, in the following description, "orthogonal" means intersecting at an angle of 90 degrees or approximately 90 degrees. Additionally, "parallel" includes both parallel and substantially parallel.

[0029] (Structure of a wire rope inspection system)

[0030] like Figure 1 As shown, the wire rope inspection system 100 includes a wire rope inspection device 101 and a processing device 102. The wire rope inspection system 100 inspects the wire rope W installed in the elevator 103. Specifically, the wire rope inspection system 100 is a system used to inspect for abnormalities (such as wire breakage) in the wire rope W of the elevator 103, which is the object of inspection.

[0031] Furthermore, the wire rope inspection system 100 is a system capable of identifying anomalies in the wire rope W that are difficult to visually detect using the total flux method, which measures the internal magnetic flux of the wire rope W. When the wire rope W contains abnormal portions (wire breakage, thinning, rust, etc.), the magnetic flux at the abnormal portions differs from that at the normal portions. The total flux method differs from methods that measure leakage magnetic flux from abnormal portions on the surface of the wire rope W; it can also measure abnormal portions within the wire rope W. Additionally, the wire rope inspection system 100 is configured to initiate the inspection of the wire rope W based on input operations performed by the inspection operator on the processing device 102.

[0032] (Elevator structure)

[0033] like Figure 1 and Figure 2 As shown, elevator 103 includes a car compartment 103a, pulleys 103b and 103c, a shell 103d, a control device 103e, and a wire rope W. Elevator 103 is configured to move the car compartment 103a, which carries people and goods, vertically by rotating the wire rope W through the pulley 103b (pulley) mounted on a winch. Furthermore, elevator 103 is, for example, a rope elevator with a double-winding method (full-winding method) having two pulleys 103b and 103c. The double-winding method refers to a structure where the wire rope W, guided from the winch pulley 103b to the pulley 103c (which acts as a guide pulley), returns to the winch pulley 103b, thus winding the wire rope W twice on the pulley 103b. Additionally, the pulleys 103b and 103c are located inside the shell 103d.

[0034] The control device 103e includes a control panel that controls the operation of various parts of the elevator 103. Furthermore, the control device 103e includes a wireless communication module, etc., and is configured to communicate with the wire rope inspection device 101 and the processing device 102. Moreover, the control device 103e is configured to change the travel speed (operational speed) of the elevator car 103a during normal operation (normal operation mode) and during inspection operation (inspection operation mode) based on input operations to the processing device 102. Normal operation is the operation performed while carrying passengers and goods, while inspection operation is the operation for inspecting the wire rope W. For example, during normal operation, the operating speed (travel speed of the wire rope W) is approximately 500 m / min, and during inspection operation, the operating speed is approximately 10 m / min or more and 40 m / min or less. Furthermore, the vibration of the wire rope W increases as the operating speed of the elevator 103 increases.

[0035] The wire rope W is formed by braiding magnetic wire material (e.g., stranded braid), and is a magnetic body made of long strips of material. To prevent the wire rope W from cutting due to deterioration, the condition of the wire rope W (whether damaged, etc.) is inspected using a wire rope inspection device 101. Wire ropes W judged to have deteriorated beyond a predetermined standard based on the measurement results of their magnetic flux are replaced by the inspection operator. Furthermore, in... Figure 1 In the example shown, only one wire rope W is illustrated for simplicity, but elevator 103 has multiple wire ropes W. For example, elevator 103 has four wire ropes W (see reference). Figure 7 and Figure 8 ).

[0036] The wire rope W is configured to be positioned along the X direction (refer to) at the location of the wire rope inspection device 101. Figure 3 The wire rope inspection device 101 measures the magnetic flux of the wire rope W as it moves along the direction of extension (X direction) of the wire rope W. Specifically, while moving the wire rope W in the X direction using a winch, as is the case with the wire rope W used in the elevator 103, the wire rope inspection device 101 measures the magnetic flux of the wire rope W. Thus, by measuring the magnetic flux at various locations in the X direction, the wire rope inspection device 101 inspects for damage at various locations in the X direction of the wire rope W.

[0037] (Structure of the processing device)

[0038] like Figure 2As shown, the processing device 102 includes a communication unit 102a, a control unit 102b, a storage unit 102c, and a display unit 102d. The processing device 102 displays the measurement results of the magnetic flux of the wire rope W by the wire rope inspection device 101, and analyzes the measurement results of the magnetic flux of the wire rope W by the wire rope inspection device 101. Specifically, the processing device 102 is configured to acquire detection signals from the detection coils 31a and 31b of the detection unit 30 (described later), and determine whether there is an abnormality in the wire rope W based on the acquired detection signals. The processing device 102 is, for example, a personal computer used by an inspection operator performing an inspection of the wire rope W.

[0039] The communication unit 102a is configured to communicate with the wire rope inspection device 101 and the control device 103e of the elevator 103. The communication unit 102a is a communication interface. Specifically, the communication unit 102a includes a wireless communication module capable of wireless communication via wireless LAN and Bluetooth (registered trademark). The processing device 102 receives the measurement results (magnetic flux signal) of the wire rope W from the wire rope inspection device 101 via the communication unit 102a. Furthermore, the processing device 102 is configured to obtain information about the operating mode of the elevator 103 (operating mode switching information) from the elevator 103 (the control device 103e of the elevator 103).

[0040] The control unit 102b controls each part of the control processing device 102. The control unit 102b includes a processor such as a CPU (Central Processing Unit) and a memory. Based on the measurement results (detection signals) of the wire rope W received via the communication unit 102a, the control unit 102b analyzes damage (abnormalities) of the wire rope W, such as wire breakage (wire disconnection).

[0041] The storage unit 102c is, for example, a storage medium including flash memory, used to store (preserve) information such as the measurement results of the wire rope W from the detection coils 31a and 31b, and the analysis results of the measurement results of the wire rope W by the control unit 102b.

[0042] The display unit 102d is, for example, an LCD monitor, used to display information such as the measurement results of the wire rope W and the analysis results of the measurement results of the wire rope W by the control unit 102b.

[0043] (Structure of the wire rope inspection device)

[0044] Next, the structure of the wire rope inspection device 101 in the first embodiment will be described.

[0045] like Figure 2 and Figure 3As shown, the wire rope inspection device 101 includes a magnetic field application unit 10, an excitation unit 20, a detection unit 30, and a control board 40, which serve as a structure for measuring the magnetic flux (magnetic field) of the wire rope W.

[0046] In the first embodiment, the magnetic field applying unit 10 adjusts the direction of magnetization of the wire rope W by pre-applying a magnetic field to the wire rope W. The magnetic field applying unit 10 is, for example, a permanent magnet. Furthermore, the excitation unit 20 is configured to apply a magnetic field (magnetic flux) to the wire rope W. Specifically, the excitation unit 20 includes an excitation coil 21 that excites (makes the wire rope W vibrate) the magnetized state of the wire rope W. Details of the magnetic field applying unit 10 and the excitation unit 20 will be described later.

[0047] In the first embodiment, the detection unit 30 is configured to detect the magnetic flux of the moving wire rope W as it moves along the direction of extension (X direction) of the wire rope W due to the drive of the elevator 103. The detection unit 30 includes a first portion 30a disposed on one side (Z1 direction side) in a direction orthogonal to the direction of extension (X direction) of the wire rope W, and a second portion 30b disposed on the other side (Z2 direction side). The detection unit 30 also includes a detection coil 31a disposed on the first portion 30a and a detection coil 31b disposed on the second portion 30b. In the first embodiment, the detection coils 31a and 31b detect the magnetic flux of the wire rope W to which a magnetic field is applied by the excitation unit 20. Furthermore, the detection coils 31a and 31b output a magnetic flux signal as a detection signal by detecting the internal magnetic flux of the wire rope W using the total magnetic flux method. Details of the detection unit 30 will be described later.

[0048] The control board 40 includes a processing unit 41, a magnetic flux signal acquisition unit 42, and a communication unit 43. The control board 40 controls the operation of the excitation unit 20 (excitation coil 21) based on control signals from the processing unit 41. Furthermore, the control board 40 controls each part of the wire rope inspection device 101 through control processing by the processing unit 41. The processing unit 41 includes a processor such as a CPU, a memory, and an AD converter. The magnetic flux signal acquisition unit 42 acquires (receives) magnetic flux signals from the detection units 30 (detection coils 31a and 31b). The magnetic flux signal acquisition unit 42 includes an amplifier. Moreover, the magnetic flux signal acquisition unit 42 amplifies the acquired magnetic flux signals and outputs (transmits) them to the processing unit 41. Furthermore, the communication unit 43 is configured to communicate with the processing device 102 and the control device 103e of the elevator 103. The communication unit 43 includes a wireless communication module capable of wireless communication via wireless LAN and Bluetooth (registered trademark). The communication unit 43 outputs (transmits) the acquired magnetic flux signals to the processing device 102. Furthermore, the wire rope inspection device 101 can also be wired to the handling device 102 and the control device 103e of the elevator 103 via the communication unit 43.

[0049] Anomaly Detection Using the Full Flux Method

[0050] like Figure 4 and Figure 5 As shown, during inspection operation (inspection operation mode), in the wire rope inspection system 100 of the first embodiment, the wire rope W is guided relative to the wire rope inspection device 101 in the X2 direction by the rotation of the rope pulley 103b. The wire rope W guided to the wire rope inspection device 101 is first pre-adjusted with a magnetic field by the magnetic field application unit 10. Then, the excitation coil 21 of the excitation unit 20 excites the magnetized state of the wire rope W, which has been pre-adjusted with a magnetic field (magnetization). Then, the detection coils 31a and 31b of the detection unit 30 detect the magnetic flux of the wire rope W, which has been excited after being magnetized, using the full flux method. That is, in the first embodiment, the detection coils 31a and 31b are configured to detect the magnetic flux of the wire rope W after it has been pre-applied with a magnetic field by the magnetic field application unit 10 (after magnetization).

[0051] The magnetic field applying part 10 includes a pair of magnetic field applying parts 10a and 10b arranged in a direction orthogonal to the extension direction of the wire rope W (Z direction). The pair of magnetic field applying parts 10a and 10b are arranged on both sides of the short side direction (the direction orthogonal to the extension direction of the wire rope W, the Z direction) of the wire rope W, sandwiching the wire rope W in the middle. Specifically, the magnetic field applying part 10a is arranged on the Z1 direction side of the wire rope W. Furthermore, the magnetic field applying part 10b is arranged on the Z2 direction side of the wire rope W. Moreover, the N pole (with a diagonal line) of the magnetic field applying part 10a facing the Z2 direction and the N pole (with a diagonal line) of the magnetic field applying part 10b facing the Z1 direction are separated by the wire rope W. The magnetic field applying parts 10a and 10b are configured to apply a strong magnetic field so that the magnetization directions of the wire rope W are approximately the same.

[0052] Furthermore, the excitation coil 21 is configured to wind all four steel wire ropes W together along the direction (X direction) in which the steel wire ropes W extend. Moreover, the excitation coil 21 is configured to be wound around the outside of the detection coils 31a and 31b relative to the steel wire ropes W. The excitation coil 21 generates a magnetic flux (magnetic field) along the direction (X direction) in which the steel wire ropes W extend by flowing an excitation alternating current through the coil (inner side of the coil loop). Then, the excitation coil 21 applies the generated magnetic flux (magnetic field) to the steel wire ropes W. Specifically, an alternating current (excitation current) of a fixed magnitude and frequency flows through the excitation unit 20 (excitation coil 21) under the control of the processing unit 41, thereby applying a magnetic field in a manner that vibrates in the direction (X direction) in which the steel wire ropes W extend. That is, the excitation unit 20 causes the magnetic field (magnetic flux) in the steel wire ropes W, which has been pre-adjusted by the magnetic field application unit 10, to vibrate periodically, producing a magnetic field in the X1 direction and a magnetic field in the X2 direction.

[0053] <Magnetic flux detection performed by a probe coil>

[0054] In the first embodiment, detection coils 31a and 31b are configured to clamp one steel wire rope W in the middle using two coils. Furthermore, detection coils 31a and 31b are provided on each of the multiple (four) steel wire ropes W. That is, two coils, detection coil 31a and detection coil 31b, are provided for each of the multiple (four) steel wire ropes W. Therefore, four detection coils 31a are provided in the first part 30a, and four detection coils 31b are provided in the second part 30b.

[0055] like Figure 5As shown, detection coils 31a and 31b are independent saddle-type coils. Detection coils 31a and 31b are respectively configured to cover half a circumference of the wire rope W during inspection operation. Therefore, by combining detection coils 31a and 31b, the wire rope W is completely surrounded. Furthermore, detection coils 31a and 31b are each composed of a conductor pattern disposed on a flexible substrate. Additionally, detection coils 31a and 31b are configured to be wound around the wire rope W along the direction of its extension. That is, detection coils 31a and 31b are configured to be wound around the entire circumference of the wire rope W using two saddle-type coils along the direction of its extension (X direction). Furthermore, the first portion 30a and the second portion 30b are configured to abut against each other during inspection operation. The first portion 30a and the second portion 30b have grooves provided such that the wire rope W is surrounded by detection coils 31a and 31b when they are in contact with each other. Furthermore, in this specification, "winding" is described as including not only winding (wrapping) more than one full turn, but also winding less than one turn (e.g., half a turn) in terms of the number of times (angles).

[0056] Furthermore, detection coils 31a and 31b are respectively wound along the direction (X direction) of the extension of the steel wire rope W, thereby detecting (measuring) the magnetic flux penetrating the inner side of the coil along the direction (X direction) of the extension of the steel wire rope W. Moreover, detection coils 31a and 31b are configured to detect changes in the magnetic flux (magnetic field) that periodically changes with time due to the excitation unit 20 (excitation coil 21). Additionally, detection coils 31a and 31b each output a magnetic flux signal (detection signal) representing the detected magnetic flux to the magnetic flux signal acquisition unit 42 of the control board 40. For example, when detecting the magnetic flux of four steel wire ropes W, a total of eight magnetic flux signals are acquired using the magnetic flux signal acquisition unit 42.

[0057] (Configuration of the detection unit during normal operation and during inspection operation)

[0058] Next, refer to Figure 3 as well as Figures 6-8This explains the movement of the detection unit 30 in the wire rope inspection device 101. As described above, in the wire rope inspection device 101 of the first embodiment, during normal operation, the wire rope W moves at a relatively high speed relative to the detection unit 30, resulting in a large amplitude of vibration in the direction perpendicular to the travel direction of the wire rope W (the direction in which the wire rope W extends, the X direction) (the direction within the YZ plane). Furthermore, during inspection operation, the wire rope W moves at a relatively low speed relative to the detection unit 30, resulting in a smaller amplitude of vibration in the direction perpendicular to the travel direction of the wire rope W. The wire rope inspection device 101 of the first embodiment is configured such that the separation distance between the detection unit 30 and the wire rope W is changed during normal operation (normal operation mode) and inspection operation (inspection operation mode) by controlling the processing unit 41 of the control board 40.

[0059] Specifically, the wire rope inspection device 101 is configured such that, when the elevator 103's operating mode is set to the normal operating mode (normal operation), the detector 30 is positioned in the normal operating position such that the separation distance between the detector 30 and the wire rope W is relatively large. Furthermore, the wire rope inspection device 101 is configured such that, when the elevator 103's operating mode is switched to an inspection operating mode where the wire rope W moves at a slower speed than in the normal operating mode (in inspection operation), the detector 30 is positioned in the inspection position for inspecting the wire rope W such that the separation distance between the detector 30 and the wire rope W is relatively small. More specifically, during inspection operation, in order to improve the sensitivity of the signals generated by the detection coils 31a and 31b, the detector 30 (detection coils 31a and 31b) is configured to surround the wire rope W such that the separation distance between the detector 30 and the wire rope W is relatively small. In addition, during normal operation, in order to prevent the wire rope W from contacting the detection unit 30 (detection coils 31a and 31b) even when the amplitude of the wire rope W increases, the detection unit 30 (detection coils 31a and 31b) is configured such that the separation distance between the detection unit 30 and the wire rope W is relatively large.

[0060] In addition, such as Figure 3 As shown, the wire rope inspection device 101 includes a housing 101a and a base 101b. The magnetic field application unit 10 and the excitation unit 20 (excitation coil 21) are fixed to the housing 101a. That is, the magnetic field application unit 10 and the excitation unit 20 (excitation coil 21) do not change position during normal operation and inspection operation. On the other hand, the detection unit 30 (first part 30a and second part 30b) is fixed to the drive mechanism 50 described later (see reference). Figure 2 The base portion 101b is configured to be able to change position. Furthermore, the base portion 101b is fixed inside the housing 103d of the elevator 103. Moreover, the housing 101a and the drive unit base portion 50a (described later) are fixed to the base portion 101b.

[0061] <Structure for moving the detector>

[0062] like Figure 6 As shown, the wire rope inspection device 101 includes a drive mechanism 50. The drive mechanism 50 includes a drive base 50a, a drive unit 51, retaining plates 52a and 52b, linear guides 53a and 53b, and a linear guide rail 53c. Furthermore, the drive unit 51 is an example of the "solenoid-type drive unit" of this disclosure.

[0063] The drive unit base 50a is mounted to the base 101b of the housing 101a, on which the wire rope inspection device 101 is fixed. Holding plates 52a and 52b hold the detection unit 30. Specifically, holding plate 52a holds the first portion 30a on which the detection coil 31a is disposed. Furthermore, holding plate 52b holds the second portion 30b on which the detection coil 31b is disposed. Additionally, linear guides 53a and 53b are fixed to holding plates 52a and 52b respectively. The linear guides 53a and 53b engage with a linear guide rail 53c fixed to the drive unit base 50a. The holding plates 52a and 52b are configured to move linearly relative to the drive unit base 50a along the Z-direction using the linear guides 53a and 53b and the linear guide rail 53c. Therefore, the first portion 30a held on holding plate 52a and the second portion 30b held on holding plate 52b are configured to move along the Z-direction.

[0064] Furthermore, in the first embodiment, the drive unit 51 moves the detection unit 30 (detection coils 31a and 31b) in a direction away from the wire rope W (Z1 and Z2 directions) to a normal operating position. Specifically, the drive unit 51 includes a solenoid-type drive unit (sowary actuator) that moves the detection unit 30 in a direction away from the wire rope W by generating a magnetic field using an electric current. For example, the drive unit 51 has a solenoid coil and a movable iron core. The drive unit 51 moves the movable iron core in the direction away from the wire rope W (Z2 direction) by allowing current to flow through the solenoid coil. In addition, a portion of the solenoid coil of the drive unit 51 is fixed to the drive unit base 50a. Moreover, the movable iron core of the drive unit 51 is fixed to the fitting 51a. Moreover, the fitting 51a is fixed to the retaining plate 52b. Thus, the drive unit 51 moves the retaining plate 52b, which holds the second portion 30b, in the Z2 direction by moving the movable iron core in the Z2 direction.

[0065] Additionally, the drive mechanism 50 includes a force-applying part 54. In the first embodiment, the force-applying part 54 applies a force to the detection part 30 (detection coils 31a and 31b) in a direction approaching the wire rope W using elastic force until the detection part 30 (detection coils 31a and 31b) reaches the inspection position. Specifically, the force-applying part 54 is configured to apply a force to the first part 30a and the second part 30b in a manner that brings them closer together, towards the inspection position using elastic force.

[0066] In detail, the force-applying part 54 includes a spring 54a, and spring fixing parts 54b and 54c. The spring 54a is configured to extend and retract along the Z direction. Furthermore, the Z1 direction end of the spring 54a is fixed to the spring fixing part 54b. Additionally, the Z2 direction end of the spring 54a is fixed to the spring fixing part 54c. The Z1 direction spring fixing part 54b is fixed to the drive base part 50a. Furthermore, the Z2 direction spring fixing part 54c is fixed to the retaining plate 52b. The force-applying part 54 is configured to apply a force in the Z1 direction to the retaining plate 52b by the spring 54a, which is in a state of extension along the Z direction, generating a spring force in the contraction direction.

[0067] Furthermore, the drive mechanism 50 has a damping section 55, a rack section 56a, and a rack section 56b as a damping mechanism. Additionally, the damping section 55 is an example of the "damping section" of this disclosure.

[0068] In the first embodiment, when the detection unit 30 moves toward the wire rope W due to the force applied by the force application unit 54, the damping unit 55 reduces the moving speed of the detection unit 30. Specifically, the damping unit 55 utilizes the viscous resistance of the fluid filling it to reduce the moving speed of the detection unit 30. Furthermore, the damping unit 55 includes a gear portion 55a. The gear portion 55a rotates while meshing with the teeth of the rack portions 56a and 56b, which will be described later. Additionally, the damping unit 55 is capable of rotating about an axis along the X direction with the gear portion 55a as its rotation axis. Figure 6 The rotational speed of the gear 55a in both the s and t directions is fixed to the drive unit base 50a. Furthermore, the damping unit 55 is a rotary damper configured to utilize the viscous resistance of the fluid to attenuate the rotational speed of the gear 55a in at least one direction (the direction in which the probe 30 approaches the wire rope W). The damping unit 55 is positioned in the Z direction at the center between the first part 30a and the second part 30b of the probe 30.

[0069] Furthermore, in the first embodiment, rack portions 56a and 56b are rod-shaped members extending linearly along the Z direction. Additionally, rack portions 56a and 56b each have teeth that mesh with the gear portion 55a of the damping portion 55. That is, a rack and pinion structure is formed by the rotating gear portion 55a and the linear rack portions 56a and 56b. Specifically, the teeth of rack portions 56a and 56b are arranged in a linear arrangement along the Z direction. Moreover, in the first embodiment, rack portion 56a is fixed to a retaining plate 52a at one end in the Z1 direction, allowing it to move in conjunction with the first portion 30a of the detection portion 30. Furthermore, rack portion 56a is configured such that its other end in the Z2 direction meshes with the gear portion 55a of the damping portion 55. Additionally, rack portion 56b is fixed to the retaining plate 52b at one end in the Z2 direction, allowing it to move in conjunction with the second portion 30b of the detection portion 30. Furthermore, the rack portion 56b is configured such that its other end on the Z1 direction side meshes with the gear portion 55a of the damping portion 55.

[0070] The teeth of the rack portion 56a are configured to mesh with the gear portion 55a in the Y1 direction, which rotates about an axis along the X direction. Furthermore, the teeth of the rack portion 56b are configured to mesh with the gear portion 55a in the Y2 direction, which also rotates about an axis along the X direction. Therefore, in the direction of the gear portion 55a… Figure 6 When rotating in the S direction, rack section 56a and rack section 56b move in tandem in the Z direction in a direction away from each other. Additionally, when gear section 55a rotates in the S direction... Figure 6 When rotating in the t direction, rack portions 56a and 56b move in conjunction in the Z direction toward each other. Therefore, in the drive mechanism 50 of the first embodiment, the rotational movement of one gear portion 55a causes the two rack portions 56a and 56b to move in conjunction, thus the first portion 30a and the second portion 30b are configured to move in conjunction by equal distances. Furthermore, in the damping portion 55, the rotational speed of the gear portion 55a in at least the t direction (the direction in which rack portions 56a and 56b approach each other) is attenuated. Therefore, the movement speeds of the first portion 30a and the second portion 30b are configured to attenuate in conjunction.

[0071] Furthermore, the drive mechanism 50 of the wire rope inspection device 101 includes a position detection unit 57 and a fixing unit 58. In the first embodiment, the detection unit 30 is fixed in the normal operating position during normal operation.

[0072] In the first embodiment, the position detection unit 57 detects when the detection unit 30 is positioned in its normal operating position. Specifically, the position detection unit 57 is fixed to the drive unit base 50a. Furthermore, the position detection unit 57 includes a mechanical switch that is activated when the first part 30a moves in the Z1 direction and is positioned in its normal operating position, abutting against the retaining plate 52a. Additionally, based on the state where the switch is activated, the position detection unit 57 outputs a position detection signal to the control board 40 indicating that the first part 30a has been detected.

[0073] The fixing part 58 secures the first part 30a of the probe 30, which is in its normally operating position. Specifically, the fixing part 58 includes a fixing pin 58a, a spring 58b, and an actuator 58c. The fixing part 58 is fixed to the drive base part 50a. Furthermore, the fixing part 58 is secured by engaging (inserting) the fixing pin 58a into the hole 56c provided in the rack part 56a (see reference). Figure 8 The first portion 30a held by the rack portion 56a is fixed by the spring 58b. Additionally, the fixing pin 58a is subjected to a force in the direction (X1 direction) toward the insertion hole 56c by the spring 58b. Furthermore, the actuator 58c applies force to the fixing pin 58a in a manner that moves it in the direction of being pulled out of the hole 56c (X2 direction). Specifically, the actuator 58c is a solenoid actuator having a solenoid coil and a movable iron core. The actuator 58c pulls the fixing pin 58a out of the hole 56c based on a control signal from the control board 40, thereby releasing the fixing part 58 from the detection part 30. Therefore, the fixing part 58 is configured such that, without the driving force of the actuator 58c, the fixing pin 58a moves toward the first portion 30a of the detection part 30 by the force of the spring 58b. That is, even when no drive signal (drive power) is generated from the control board 40, the fixing part 58 keeps the probe part 30 (first part 30a) in the normal operating position with the fixing pin 58a inserted into the hole part 56c.

[0074] Furthermore, the rack portion 56a is configured to extend in the Z direction to a position above (Z1 direction side) the fixing pin 58a when the detection portion 30 (first portion 30a) is in the inspection position. Therefore, the drive mechanism 50 of the wire rope inspection device 101 is configured such that even when the driving force of the actuator 58c of the fixing portion 58 is stopped while the detection portion 30 is in the inspection position, the fixing pin 58a does not protrude to a position above the rack portion 56a in the X1 direction. Thus, the drive mechanism 50 of the wire rope inspection device 101 is configured such that when the detection portion 30 is moved from the inspection position to the normal operating position, the movement of the rack portion 56a (first portion 30a) in the Z1 direction is prevented from being hindered by the fixing pin 58a protruding in the X1 direction.

[0075] <Movement of the detection unit to its normal operating position>

[0076] like Figure 7 and Figure 8 As shown, when the operation of the elevator 103 is switched from the inspection operation mode to the normal operation mode based on the input operation to the processing device 102, the various parts of the drive mechanism 50 are controlled by the processing unit 41 of the control board 40 to move the detection unit 30 from the inspection position to the normal operation position. Furthermore, in Figure 7 and Figure 8 The diagram shows the portion of the drive unit base 50a that is fixed in a manner connected to the ground wire.

[0077] Specifically, by supplying drive power from the control board 40 to the drive unit 51, the drive unit 51 moves the retaining plate 52b in the Z2 direction by moving the second part 30b of the detection unit 30 in the Z2 direction. At this time, since the retaining plates 52a and 52b move in conjunction with each other through the damping part 55 (gear part 55a), the rack part 56a, and the rack part 56b, the drive force of the drive unit 51 moves the first part 30a in the Z1 direction. That is, the drive unit 51 moves the first part 30a and the second part 30b by a distance equal to the separation from the wire rope W while resisting the elastic force of the force application part 54.

[0078] Then, when the first part 30a, which has moved in the Z1 direction, reaches the normal operating position, the position detection unit 57 detects that the first part 30a is positioned in the normal operating position. Then, the first part 30a is fixed by the fixing part 58. For example, when the detection unit 30 is positioned in the inspection position, the control board 40 (processing unit 41) stops supplying driving force to the actuator 58c of the fixing part 58. In this case, the fixing pin 58a of the fixing part 58 stops abutting against the X2 direction side surface of the rack part 56a while being subjected to a force in the X1 direction by the spring 58b. Then, when the rack part 56a is moved by the drive unit 51, thereby moving the first part 30a to the normal operating position, the fixing pin 58a is inserted into the hole 56c by the spring 58b of the fixing part 58, thereby fixing the first part 30a. Furthermore, since the first part 30a and the second part 30b are configured to operate in conjunction with each other using the rack part 56a, the rack part 56b and the gear part 55a, the position of the second part 30b is also fixed when the position of the first part 30a is fixed.

[0079] As described above, when switching the operation of elevator 103 from inspection mode to normal operation mode, the driving force of drive unit 51 resists the elastic force of force application unit 54 and moves detection unit 30 (first part 30a and second part 30b) to normal operation position. Then, detection unit 30, which is positioned in normal operation position, is fixed by fixing unit 58. Alternatively, when moving detection unit 30 (first part 30a and second part 30b) from inspection position to normal operation position, driving force can be supplied to actuator 58c of fixing unit 58 to move fixing pin 58a in the X2 direction. In this case, it can also be configured such that drive mechanism 50 stops supplying driving force to actuator 58c based on position detection signal of position detection unit 57, thereby causing fixing pin 58a to be inserted into hole 56c of rack part 56a.

[0080] <Movement of the detection unit to the inspection position>

[0081] Furthermore, when the operation of the elevator 103 is switched from the normal operation mode to the inspection operation mode based on the input operation of the processing device 102, the various parts of the drive mechanism 50 are controlled by the processing unit 41 of the control board 40 to move the detection unit 30 from the normal operation position to the inspection position.

[0082] Specifically, firstly, the detection units 30 (first part 30a and second part 30b) that are fixed in their normal operating position by the fixing part 58 are released. That is, by supplying drive power to the actuator 58c of the fixing part 58, the fixing pin 58a is pulled out from the hole 56c of the rack part 56a. As a result, the first part 30a is released, and therefore, due to the elastic force of the spring 54a of the force-applying part 54, the first part 30a and the second part 30b are applied force in a manner that brings them closer together. At this time, the moving speed of the first part 30a and the second part 30b is attenuated by the damping part 55. In addition, the first part 30a and the second part 30b move at equal moving speeds due to the meshing of the rack part 56a and the gear part 55a of the damping part 55. Furthermore, since the first part 30a and the second part 30b are separated from the wire rope W by an equal distance, they move at the same speed toward the wire rope W due to the elastic force applied by the force-applying part 54. As a result, the first part 30a and the second part 30b stop moving at the position of the wire rope W in a state of contact with each other.

[0083] As described above, when switching the operation of elevator 103 from normal operation mode to inspection operation mode, the movement speed is reduced by the damping part 55, and the elasticity of the force-applying part 54 is used to move the detection part 30 (first part 30a and second part 30b) to the inspection position. Moreover, in the first embodiment, the first part 30a and the second part 30b are configured to be positioned in the inspection position in a state where they are abutted against each other by the force applied by the force-applying part 54.

[0084] (Effects of the first implementation method)

[0085] The following effects can be obtained in the wire rope inspection device 101 of the first embodiment.

[0086] As described above, the wire rope inspection device 101 of the first embodiment includes a force-applying part 54 that applies a force to the detection part 30 in a direction close to the wire rope W using elasticity until the detection part 30 reaches the inspection position for positioning the detection part 30 during inspection operation to inspect the wire rope W. Therefore, the detection part 30 can be moved to the inspection position for inspection by applying force using the force-applying part 54. Thus, the detection part 30 can be positioned as close as possible to the wire rope W by applying force using the elasticity of the force-applying part 54, rather than by controlling the movement of the detection part 30. Therefore, the detection part 30 can be positioned as close as possible to the wire rope W without precise control of its movement. As a result, the increased processing burden of the control process can be suppressed. Therefore, even when the detection part 30, which detects the magnetic flux of the wire rope W, is moved by remote operation, the detection part 30 can be easily positioned as close as possible to the wire rope W. Furthermore, during normal operation, precise control of the placement of the detection part 30 is not required. Therefore, by using the drive unit 51 to move the detection unit 30 away from the wire rope W against the elastic force (acting force) of the force application unit 54, the detection unit 30 is moved to the normal operating position for normal operation, thereby making it easy to position the detection unit 30 in the normal operating position.

[0087] Furthermore, in the first embodiment, by configuring it as follows, the following further effects can be obtained.

[0088] That is, in the first embodiment, the detection unit 30 includes a first portion 30a disposed on one side (Z1 direction side) in a direction orthogonal to the direction in which the wire rope W extends, and a second portion 30b disposed on the other side (Z2 direction side). The force-applying unit 54 is configured to apply force to the first portion 30a and the second portion 30b in a manner that brings them closer together until the first portion 30a and the second portion 30b reach the inspection position. With this structure, by applying force to the first portion 30a and the second portion 30b of the detection unit 30 in a manner that brings them closer together, the first portion 30a and the second portion 30b can easily approach the wire rope W from both sides. Therefore, the detection unit 30, which is divided into the first portion 30a and the second portion 30b, can be easily configured to surround the wire rope W as closely as possible.

[0089] Furthermore, in the first embodiment, the drive unit 51 is configured to move the first portion 30a and the second portion 30b at a distance equal to that of the wire rope W. With this configuration, by moving the first portion 30a and the second portion 30b using the drive unit 51, the first portion 30a and the second portion 30b can be positioned at a distance equal to that of the wire rope W. Therefore, when the first portion 30a and the second portion 30b are moved closer to the wire rope W by applying force using the elastic force of the force-applying unit 54, the wire rope W can be positioned at a position between the first portion 30a and the second portion 30b. Thus, the distances between the first portion 30a and the second portion 30b and the wire rope W can be made equal, and when the wire rope W is surrounded by the first portion 30a and the second portion 30b, detection results can be obtained with high precision using the first portion 30a and the second portion 30b.

[0090] Furthermore, in the first embodiment, the first portion 30a and the second portion 30b are configured to be positioned in the inspection position in a state where they are abutted against each other by force applied by the force-applying part 54. With this structure, the first portion 30a and the second portion 30b are positioned in a state where they are abutted against each other by force applied by the force-applying part 54. Therefore, the first portion 30a and the second portion 30b can be positioned around the wire rope W by utilizing the elasticity of the force-applying part 54 to apply a force to the first portion 30a and the second portion 30b in a direction that brings them into close contact with each other. As a result, the first portion 30a and the second portion 30b can be brought into close contact with each other, and positional displacement of the first portion 30a and the second portion 30b is suppressed. Therefore, the detection result can be obtained with high precision using the detection part 30.

[0091] Furthermore, in the first embodiment, a fixing part 58 is provided to fix the detection unit 30 in its normally operating position. With this structure, the detection unit 30 is fixed in the normally operating position by the fixing part 58, thus the detection unit 30 can be fixed in the normally operating position without the drive unit 51 generating a driving force to resist the elastic force of the force-applying part 54. Therefore, since the detection unit 30 can be fixed in the normally operating position by the fixing part 58 without constantly supplying power to the drive unit 51 during normal operation, the increase in power consumption during normal operation can be suppressed.

[0092] Furthermore, in the first embodiment, a damping part 55 (attenuation part) is provided to attenuate the moving speed of the detection part 30 when it moves toward the wire rope W due to the force applied by the force-applying part 54. With this structure, the moving speed of the detection part 30, which moves under the elastic force of the force-applying part 54, can be attenuated. Therefore, it is possible to prevent the moving speed of the detection part 30 from increasing beyond what is desired when moving toward the inspection position. Thus, it is possible to suppress the application of large forces when the detection part 30 is positioned at the inspection position, thereby preventing abnormalities in the detection part 30.

[0093] Furthermore, in the first embodiment, the drive unit 51 includes a solenoid-type drive unit that moves the detection unit 30 away from the wire rope W by generating a magnetic field using an electric current. The damping unit 55 (attenuation unit) attenuates the movement speed of the detection unit 30 by utilizing the viscous resistance of the fluid filled inside it when the detection unit 30 moves towards the wire rope W under the force applied by the force application unit 54. With this structure, the movement speed of the detection unit 30 when moving towards the wire rope W can be attenuated by the damping unit 55. Therefore, when moving the detection unit 30 towards the inspection position towards the wire rope W, the movement speed can be suppressed from becoming excessive without using the driving force of the drive unit 51. Thus, it is possible to easily suppress the excessive movement speed of the detection unit 30 when moving towards the wire rope W without controlling the magnitude of the driving force of the drive unit 51.

[0094] Furthermore, in the first embodiment, rack portions 56a and 56b are provided, each having teeth and extending in a straight line. The damping portion 55 has a gear portion 55a that rotates while meshing with the teeth of the rack portions 56a and 56b, and is configured to attenuate the rotational speed of the gear portion 55a. The rack portions 56a and 56b are configured such that one end is fixed to the detection portion 30, and the other end meshes with the gear portion 55a of the damping portion 55. With this structure, the movement speed of the rack portions 56a and 56b meshing with the gear portion 55a can be attenuated by attenuating the rotational speed of the gear portion 55a of the damping portion 55. Therefore, the movement speed of the detection portion 30, which is fixed to one end of the rack portions 56a and 56b, can be easily attenuated using the damping portion 55. Furthermore, as in the first embodiment, the two rack sections 56a and 56b are configured such that they face each other relative to one gear section 55a of the damping section 55. This allows the two rack sections 56a and 56b to move the same distance while their movement speeds decrease at the same rate due to the rotation of one gear section 55a of the damping section 55. Therefore, even when two different detection sections 30 (first part 30a and second part 30b) are arranged on both sides of the damping section 55, the movement distances of the two different detection sections 30 are equal, and their movement speeds decrease together. Therefore, when two different detection sections 30 are provided, compared to using separately provided attenuation sections to attenuate the movement speeds of the two different detection sections 30, a shared attenuation section (damping section 55) can be used to attenuate the movement speeds of the two different detection sections 30, thus reducing the complexity of the device structure.

[0095] Furthermore, in the first embodiment, a position detection unit 57 is provided for detecting when the detection unit 30 is positioned in the normal operating position. With this structure, the position detection unit 57 can easily detect when the detection unit 30 is positioned in the normal operating position. Therefore, based on the position detection signal of the position detection unit 57, it is possible to easily perform, for example, control to fix the detection unit 30 in the normal operating position, or control to start normal operation as if the inspection is completed.

[0096] Furthermore, in the first embodiment, the detection unit 30 is configured to detect the magnetic flux of the moving wire rope W when the wire rope W installed on the elevator 103 moves along the direction of extension of the wire rope W (X direction) driven by the elevator 103. The force application unit 54 is configured to apply force to the detection unit 30 until the detection unit 30 reaches an inspection position for positioning the detection unit 30 during inspection operation of the elevator 103 when the moving speed of the wire rope W relative to the detection unit 30 is relatively small. The drive unit 51 is configured to move the detection unit 30 to a normal operation position for positioning the detection unit 30 during normal operation of the elevator 103 when the moving speed of the wire rope W relative to the detection unit 30 is relatively large. Here, when inspecting the wire rope W installed on the elevator 103, during inspection operation when the moving speed of the wire rope W is relatively small, the amplitude of the wire rope W in the direction perpendicular to the direction of extension of the wire rope W (travel direction) becomes smaller. On the other hand, during normal operation when the wire rope W moves at a relatively high speed, the amplitude of the wire rope W in the direction perpendicular to its extension direction increases. In contrast, in the first embodiment, the force-applying unit 54 is configured to apply force to the detection unit 30 until the detection unit 30 reaches an inspection position for positioning the detection unit 30 during inspection operation of the elevator 103 when the wire rope W moves at a relatively low speed relative to the detection unit 30. Furthermore, the drive unit 51 is configured to move the detection unit 30 to a normal operation position for positioning the detection unit 30 during normal operation of the elevator 103 when the wire rope W moves at a relatively high speed relative to the detection unit 30. With this structure, when inspecting the wire rope W of the elevator 103, the force-applying unit 54 can apply force to the detection unit 30 to position the detection unit 30 as close as possible to the wire rope W during inspection operation when the amplitude of the wire rope W is relatively low. Furthermore, the detection unit 30 can be moved using the drive unit 51 so that during normal operation when the amplitude of the wire rope W is large, the detection unit 30 can be positioned away from the wire rope W. Therefore, the detection unit 30 can be moved remotely using the force application unit 54 and the drive unit 51, so that the detection unit 30 can be positioned to further improve detection sensitivity during inspection operation and to avoid contact between the wire rope W and the detection unit 30 during normal operation. As a result, even when the detection unit 30 is moved relative to the wire rope W of the elevator 103 by remote operation, by using the force application unit 54 and the drive unit 51, the detection unit 30 can be easily positioned as close as possible to the wire rope W during inspection operation and can be easily positioned away from the wire rope W during normal operation.

[0097] In addition, in the first embodiment, a magnetic field applying unit 10 is provided to pre-apply a magnetic field to the wire rope W to adjust the direction of magnetization of the wire rope W. The excitation unit 20 includes an excitation coil 21, which excites the magnetization state of the wire rope W after the magnetic field is pre-applied by the magnetic field applying unit 10. The detection unit 30 includes detection coils 31a and 31b, which are wound around the wire rope W along the direction of extension of the wire rope W. The magnetic flux of the wire rope W excited by the excitation coil 21 is detected using the full flux method. The force applying unit 54 is configured to apply force to the detection coils 31a and 31b using elastic force until the detection coils 31a and 31b reach the inspection position. The drive unit 51 is configured to move the detection coils 31a and 31b to the normal operating position. With this structure, when inspecting the wire rope W using the full magnetic flux method, the detection coils 31a and 31b that detect the internal magnetic flux of the wire rope W can be moved remotely by using the force application unit 54 and the drive unit 51, so that the detection coils 31a and 31b are wound around the wire rope W. As a result, when inspecting the wire rope W using the full magnetic flux method, the detection unit 30 can be easily configured to be as close as possible to the wire rope W.

[0098] [Second Implementation]

[0099] Reference Figures 9-13 The structure of the wire rope inspection device 201 according to the second embodiment will be described. Unlike the first embodiment, which uses a solenoid drive unit to move the detection unit 30 away from the wire rope W, this second embodiment uses a motor 251 to move the detection unit 30 away from the wire rope W. Furthermore, in the figures, parts whose structure is the same as that of the first embodiment are illustrated using the same reference numerals, and descriptions are omitted.

[0100] (Structure of the wire rope inspection system according to the second embodiment)

[0101] like Figure 9 and Figure 10 As shown, the wire rope inspection system 200 of the second embodiment includes a wire rope inspection device 201. Furthermore, the wire rope inspection device 201 includes a control board 240 and a drive mechanism 250. In addition, the structure (magnetic field application unit 10, excitation unit 20, and detection unit 30) for measuring the magnetic flux (magnetic field) of the wire rope W in the second embodiment is the same as that in the first embodiment.

[0102] The control board 240 includes a processing unit 241, a magnetic flux signal acquisition unit 42, and a communication unit 43. Similar to the control board 40 of the first embodiment, the control board 240 controls the operation of the excitation unit 20 (excitation coil 21) based on control signals from the processing unit 241. Furthermore, similar to the first embodiment, the control board 240 controls each part of the wire rope inspection device 201 through the control processing of the processing unit 241. Moreover, the processing unit 241 of the control board 240 in the second embodiment is configured to perform the speed control of the motor 251, which will be described later. The other structures of the control board 240 are the same as those of the control board 40 of the first embodiment. Details of the speed control of the motor 251 will be described later.

[0103] (Movement of the detector in the second embodiment)

[0104] like Figure 11 and Figure 12 As shown, the drive mechanism 250 includes a drive base portion 250a. The drive base portion 250a is mounted to the base portion 101b of the housing 101a to which the wire rope inspection device 201 is fixed, similar to the drive base portion 50a in the first embodiment (see reference). Figure 10 Furthermore, the drive mechanism 250 includes a force-applying section 54. The force-applying section 54 is configured similarly to the first embodiment to apply force to the first portion 30a and the second portion 30b in a manner that brings them closer together until the first portion 30a and the second portion 30b reach the inspection position.

[0105] Furthermore, the drive mechanism 250 includes a motor 251. The motor 251 is fixed to the drive unit base 250a. Additionally, the motor 251 has a rotation shaft 251a (see reference). Figure 13 The motor 251 rotates the rotating shaft 251a in the u and v directions under the control of the processing unit 241 of the control board 240. Furthermore, the motor 251 is configured to control its speed. Specifically, the control board 240 includes a motor driver (not shown). The motor 251 is, for example, a stepper motor that uses drive power from the motor driver to rotate the rotating shaft 251a. The motor driver outputs drive power for driving the motor 251 based on the control of the processing unit 241. The processing unit 241 is configured to perform control that changes the rotational speed (rotational speed) of the motor 251 by controlling the operation of the motor driver. Furthermore, the motor 251 is an example of the "drive unit" and "attenuation unit" of this disclosure.

[0106] Additionally, the drive mechanism 250 includes toothed pulleys 261a and 261b, and a belt 262. The toothed pulleys 261a are connected via a one-way clutch 263 (described later). Figure 13The belt 262 is connected to the rotating shaft 251a of the motor 251. The belt 262 transmits the rotation of the toothed pulley 261a to the toothed pulley 261b. The toothed pulley 261b is rotatably mounted on the drive base 250a. The belt 262 has fixing points 262a and 262b. Fixing point 262a is fixed to the retaining plate 52a. Fixing point 262b is fixed to the retaining plate 52b. In the drive mechanism 250 of the second embodiment, when the toothed pulley 261a rotates in the u direction, the fixing point 262a of the belt 262 moves in the Z2 direction while the fixing point 262b moves in the Z1 direction, thereby causing the first part 30a and the second part 30b to move in a coordinated manner toward each other. Furthermore, when the toothed pulley 261a rotates in the v direction, the fixed point 262a of the belt 262 moves in the Z1 direction while the fixed point 262b moves in the Z2 direction. As a result, the first part 30a and the second part 30b move in conjunction in a direction away from each other.

[0107] Here, as Figure 13 As shown, the drive mechanism 250 includes a one-way clutch 263. In the second embodiment, the one-way clutch 263 is connected to the rotating shaft 251a of the motor 251. Furthermore, the one-way clutch 263 has a clutch mechanism that transmits rotational force in only one rotational direction. Specifically, when a rotational force in the v-direction is applied to the rotating shaft 251a of the motor 251, the one-way clutch 263 rotates synchronously with the rotating shaft 251a. Moreover, when a rotational force in the u-direction is applied to the rotating shaft 251a of the motor 251, the one-way clutch 263 idles relative to the rotating shaft 251a.

[0108] Additionally, the drive mechanism 250 includes a brake 258. The brake 258 is configured to suppress the rotation of the rotating shaft 251a of the motor 251 (fixing the rotating shaft 251a) based on a control signal from the processing unit 241 of the control board 240. The processing unit 241 of the control board 240 uses the brake 258 to fix the rotating shaft 251a of the motor 251 based on a position detection signal from the position detection unit 57. Furthermore, by fixing the rotating shaft 251a of the motor 251 with the brake 258, the first portion 30a and the second portion 30b of the detection unit 30 are fixed in a state configured in a normal operating position. Furthermore, the brake 258 is an example of a "fixing unit" in this disclosure. Additionally, it is desirable that the brake 258 releases the braking (fixing) of the rotating shaft 251a when energized by power supplied from the control board 240, and brakes when the power supply is cut off.

[0109] <Movement of the detection unit to its normal operating position>

[0110] like Figure 11and Figure 12 As shown, similarly to the first embodiment, when the operation of the elevator 103 is switched from the inspection operation mode to the normal operation mode based on the input operation of the processing device 102, each part of the drive mechanism 250 is controlled by the processing unit 241 of the control board 240 to move the detection unit 30 from the inspection position to the normal operation position.

[0111] In the second embodiment, the motor 251 moves the detection units 30 (detection coils 31a and 31b) in directions away from the wire rope W (Z1 and Z2 directions). Specifically, the motor 251, under the control of the processing unit 241 of the control board 240, moves in a rotational direction against the elastic force of the force-applying unit 54. Figure 11 The motor 251 rotates in the v direction. Here, the motor 251 applies a rotational force to counteract the spring force of the force-applying part 54, causing the rotating shaft 251a to rotate in the v direction. Therefore, the one-way clutch 263 rotates synchronously with the rotating shaft 251a. Thus, when the motor 251 rotates in the v direction in a way that moves the first part 30a and the second part 30b away from each other, the toothed pulley 261a rotates synchronously with the rotating shaft 251a of the motor 251.

[0112] Furthermore, when the motor 251 rotates in the v direction, the toothed pulley 261a rotates synchronously with the rotating shaft 251a of the motor 251, thereby causing the first part 30a and the second part 30b to move in the Z1 and Z2 directions, respectively. Therefore, by rotating the motor 251 in the v direction, the detection coils 31a and 31b (the first part 30a and the second part 30b) are moved in a direction away from each other, thereby causing the detection coils 31a and 31b (the first part 30a and the second part 30b) to move away from the wire rope W. In the second embodiment, the one-way clutch 263 is configured to rotate together with the rotating shaft 251a of the motor 251 when the motor 251 applies a driving force to the detection part 30 in a direction away from the wire rope W.

[0113] Then, when the first part 30a, which has moved in the Z1 direction, reaches the normal operating position, the position detection unit 57 detects that the first part 30a is positioned in the normal operating position. In this case, the rotation of the rotating shaft 251a of the motor 251 is suppressed by the brake 258 (the rotating shaft 251a is fixed), thereby suppressing the movement of the first part 30a and the second part 30b. Then, the detection unit 30 (the first part 30a and the second part 30b) is fixed in the normal operating position.

[0114] <Movement of the detection unit to the inspection position>

[0115] In addition, similar to the first embodiment, when the operation of the elevator 103 is switched from the normal operation mode to the inspection operation mode based on the input operation of the processing device 102, each part of the drive mechanism 250 is controlled by the processing unit 241 of the control board 240 to move the detection unit 30 from the normal operation position to the inspection position.

[0116] Specifically, firstly, the brake 258 releases the fixation of the rotating shaft 251a of the motor 251. Then, since the fixation of the rotating shaft 251a is released, the elastic force of the force-applying part 54 applies force to the first part 30a and the second part 30b in a manner that brings them closer together. Here, in the second embodiment, the motor 251 is configured such that when the detection part 30 moves toward the wire rope W by being forceped by the force-applying part 54, the moving speed of the detection part 30 is reduced by rotating at a limited speed in a direction opposite to one rotation direction (v direction). Specifically, the motor 251 rotates at a fixed speed in the u direction while resisting the elastic force of the force-applying part 54, thus reducing the moving speed of the first part 30a and the second part 30b as they move toward each other. In this case, the belt 262 applies a force to the toothed pulley 261a to rotate it in the u direction due to the elastic force of the force-applying part 54. While the motor 251 applies a force in a way that supports it in the v direction to counteract the elastic force of the force-applying part 54, it causes the rotating shaft 251a to rotate in the u direction at a fixed speed. At this time, since the rotating shaft 251a of the motor 251 applies a force in the v direction, the one-way clutch 263 rotates synchronously with the rotating shaft 251a.

[0117] Then, the first part 30a and the second part 30b are positioned in the inspection position and come into contact with each other. At this moment, the first part 30a and the second part 30b stop moving as they come into contact with each other, and therefore, the driving force (rotational force) of the motor 251 is set to apply a force in the u direction. Therefore, the one-way clutch 263 idles relative to the rotating shaft 251a, and thus, the driving force of the motor 251 is not transmitted to the toothed pulley 261a. That is, in the second embodiment, the one-way clutch 263 is configured to idle relative to the rotating shaft 251a of the motor 251 when the motor 251 applies a driving force to the detection unit 30 in the direction close to the wire rope W. Therefore, the first part 30a and the second part 30b, which are positioned in the inspection position in a manner that brings them into contact with each other, are not driven by the motor 251 even when the motor 251 is continuously rotating, but are held (fixed) in the inspection position only by the elastic force of the force-applying part 54.

[0118] Furthermore, the other structures of the second embodiment are the same as those of the first embodiment described above.

[0119] (Effects of the second implementation method)

[0120] In the second embodiment, the following effects can be obtained.

[0121] In the second embodiment, the motor 251 (drive unit, attenuation unit) moves the detection unit 30 away from the wire rope W by rotating in one rotational direction (v direction). Furthermore, the motor 251 is configured to control its speed; when the detection unit 30 moves towards the wire rope W under the force applied by the force application unit 54, the movement speed of the detection unit 30 is attenuated by limiting its rotation in another rotational direction (u direction) opposite to the v direction. With this structure, the speed-controllable motor 251 can be used to simultaneously move the detection unit 30 to its normal operating position and attenuate its movement speed when moving it to the inspection position. Therefore, unlike cases where the structure for attenuating the movement speed is separate from the motor 251, the device structure can be simplified.

[0122] Furthermore, in the wire rope inspection device 201 of the second embodiment described above, by being configured as follows, the following further effects can be obtained.

[0123] That is, in the second embodiment, a one-way clutch 263 connected to the rotating shaft 251a of the motor 251 is provided. The one-way clutch 263 is configured such that when the motor 251 applies a driving force to the detection unit 30 in a direction away from the wire rope W, it rotates together with the rotating shaft 251a of the motor 251; and when the motor 251 applies a driving force to the detection unit 30 in a direction closer to the wire rope W, it idles relative to the rotating shaft 251a of the motor 251. With this structure, when the motor 251 applies a driving force to the detection unit 30 in a direction closer to the wire rope W, the one-way clutch 263 idles, thus suppressing the force applied by the motor 251 to the detection unit 30 in the direction closer to the wire rope W. Therefore, only the elastic force of the force-applying part 54 is used to apply a force to the detection unit 30 in the direction closer to the wire rope W, thus suppressing the force other than the elastic force of the force-applying part 54 acting on the detection unit 30 positioned at the inspection position. As a result, it is possible to suppress the force exerted on the detector 30 located at the inspection position that is greater than required, and thus, it is possible to suppress the load exerted on the detector 30 that is greater than required.

[0124] Furthermore, the other effects of the second embodiment are the same as those of the first embodiment described above.

[0125] [Third Implementation Method]

[0126] Reference Figures 14-16The structure of the wire rope inspection device 301 according to the third embodiment will be described below. In this third embodiment, the first part 330a has an inclined surface 332a on the surface facing the wire rope W, and the second part 330b has an inclined surface 332b on the surface facing the wire rope W. Furthermore, in the figures, parts with the same structure as those in the first and second embodiments are illustrated using the same reference numerals, and descriptions are omitted.

[0127] (Structure of the wire rope inspection system according to the third embodiment)

[0128] like Figure 14 As shown, the wire rope inspection system 300 of the third embodiment includes a wire rope inspection device 301. The wire rope inspection device 301 includes a detection unit 330. The detection unit 330 includes a first portion 330a and a second portion 330b. The first portion 330a has a detection coil 31a, and the second portion 330b has a detection coil 31b. The structures of the detection coils 31a and 31b are the same as those of the first embodiment. Furthermore, the structure of the third embodiment for measuring the magnetic flux (magnetic field) of the wire rope W is the same as that of the first embodiment.

[0129] In addition, such as Figure 15 As shown, the wire rope inspection device 301 includes the same drive mechanism 50 as in the first embodiment. The first portion 330a and the second portion 330b of the detection unit 330 are held by the holding plates 52a and 52b of the drive mechanism 50, just as in the first embodiment. That is, the detection units 330 (first portion 330a and second portion 330b) are configured similarly to those in the first embodiment: the detection units 330 are moved to a normal operating position by the drive unit 51 of the drive mechanism 50, and the detection units 330 are positioned such that they surround the wire rope W in a state where they are abutted against each other at the inspection position by being forced by the force application unit 54 until they reach the inspection position. Furthermore, in the third embodiment, similar to the first embodiment, the detection unit 330 is configured to detect the magnetic flux of the moving wire rope W while it is moving along the direction of extension of the wire rope W (X2 direction).

[0130] Furthermore, in the third embodiment, the first portion 330a has an inclined surface 332a on the surface facing the wire rope W, and the second portion 330b has an inclined surface 332b on the surface facing the wire rope W. Specifically, the inclined surface 332a is provided on the Z2 direction side of the first portion 330a, which is located on the Z1 direction side relative to the wire rope W. Similarly, the inclined surface 332b is provided on the Z1 direction side of the second portion 330b, which is located on the Z2 direction side relative to the wire rope W.

[0131] Furthermore, the first portion 330a and the second portion 330b are provided with grooves such that the wire rope W is surrounded by the detection coils 31a and 31b when they are in contact with each other. These grooves have a semi-circular cross-section along the outer surface of the wire rope W. Moreover, by arranging the first portion 330a and the second portion 330b in an inspection position with them in contact with each other, the grooves of the first portion 330a and the second portion 330b form a cylindrical space for arranging the wire rope W. In the third embodiment, in the grooves of the first portion 330a and the second portion 330b (the surfaces facing the wire rope W), inclined surfaces 332a and 332b are provided on the upstream side (X1 direction side) where the wire rope W moves.

[0132] Furthermore, inclined surfaces 332a and 332b are configured such that, with the first portion 330a and the second portion 330b positioned in an inspection position abutting each other, inclined surfaces 332a and 332b extend in a direction away from the wire rope W on the upstream side (X1 direction side). Specifically, inclined surfaces 332a and 332b are configured such that the cross-sectional area of ​​the cylindrical space formed by the grooves of the first portion 330a and the second portion 330b gradually increases towards the X1 direction side. Therefore, inclined surfaces 332a and 332b are provided such that the cylindrical space formed by the grooves of the first portion 330a and the second portion 330b extends in a funnel shape.

[0133] like Figure 16 As shown, the first part 330a and the second part 330b of the third embodiment are configured such that, when in the inspection position, they come into contact with a foreign object Wa attached to the outer surface of the wire rope W, and move in a direction away from each other (away from the wire rope W). Furthermore, the foreign object Wa is, for example, oil (grease) attached to the outer surface of the wire rope W.

[0134] Here, the first portion 330a and the second portion 330b are positioned in the inspection position in a state of contact, being subjected to a force in a direction toward each other due to the elastic force of the force-applying part 54. Furthermore, if a foreign object Wa is attached to the outer surface of the wire rope W moving from the X1 direction side toward the X2 direction side, the inclined surfaces 332a of the first portion 330a and 332b of the second portion 330b, positioned in the inspection position, come into contact with the foreign object Wa. The contact between the foreign object Wa and the inclined surfaces 332a and 332b applies a force to the first portion 330a and the second portion 330b, pushing them apart in a direction away from each other while resisting the elastic force of the force-applying part 54. In this case, the first portion 330a and the second portion 330b are moved linearly along the Z direction using the linear guides 53a and 53b and the linear guide rail 53c of the drive mechanism 50. Furthermore, after the foreign object Wa passes through, the first part 330a and the second part 330b are again subjected to the elastic force of the force-applying part 54, and the moving speed is attenuated by the damping part 55, and they are positioned in the inspection position.

[0135] Furthermore, the other structures of the third embodiment are the same as those of the first embodiment described above.

[0136] (Effects of the third implementation method)

[0137] In the third embodiment, the following effects can be obtained.

[0138] In the third embodiment, the detection unit 330 is configured to detect the magnetic flux of the moving wire rope W while the wire rope W is moving along the direction of its extension (X direction). Furthermore, the first portion 330a and the second portion 330b are configured to surround the wire rope W at the inspection position, and have inclined surfaces 332a and 332b on the surfaces facing the wire rope W, which are configured to extend in a direction away from the wire rope W from the upstream side (X1 direction side). With this structure, if a foreign object Wa is attached to the outer surface of the wire rope W moving from the upstream side relative to the detection unit 330, the foreign object Wa can be brought into contact with the inclined surfaces 332a and 332b, which are configured to extend in a direction away from the wire rope W from the upstream side. Therefore, when the foreign object Wa moving from the upstream side of the wire rope W comes into contact with the inclined surfaces 332a and 332b, it exerts a force on the first part 330a and the second part 330b in a pushing manner. Thus, when the foreign object Wa comes into contact with the detection unit 30, the first part 330a and the second part 330b of the detection unit 30 can be moved away from the wire rope W (avoidance). As a result, when the outer surface of the wire rope W to be inspected is covered with a foreign object Wa, it is possible to suppress the large force exerted on the detection unit 330 (detection coil 31a and detection coil 31b) due to contact with the foreign object Wa, and thus, it is possible to suppress the abnormality of the detection unit 330.

[0139] Furthermore, the other effects of the third embodiment are the same as those of the first embodiment described above.

[0140] [Variation Example]

[0141] Furthermore, the embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. The scope of the invention is shown by the claims rather than by the description of the embodiments above, and includes all modifications (variations) within the meaning and scope equivalent to the claims.

[0142] For example, in the first to third embodiments described above, an example was shown in which the first portion 30a (330a) and the second portion 30b (330b) were arranged on one side (X1 direction side) and the other side (X2 direction side) in a direction orthogonal to the direction in which the wire rope W extends, but the present invention is not limited thereto. In the present invention, it is also possible to configure a coil formed on a flexible substrate such as a flexible substrate as a detection coil, and to change the position of the detection part relative to the wire rope by deforming the coil.

[0143] Furthermore, in the first to third embodiments described above, examples were shown in which the first portion 30a (330a) and the second portion 30b (330b) were moved at a distance equal to that separating from the wire rope W, but the present invention is not limited thereto. For example, it is also possible to configure the first portion 30a (330a) and the second portion 30b (330b) to have different separation distances from the wire rope W.

[0144] Furthermore, in the first to third embodiments described above, an example was shown in which the first portion 30a (330a) and the second portion 30b (330b) were configured in an inspection position in a state where they were positioned by abutting against each other, but the present invention is not limited thereto. For example, it may also be configured such that the stop member is provided separately from the first portion 30a (330a) and the second portion 30b (330b), and the first portion 30a (330a) and the second portion 30b (330b) are configured in an inspection position in a state where they are positioned by abutting against the stop member.

[0145] Furthermore, in the first and third embodiments described above, examples are shown that include a fixing part 58 for fixing the detector 30 (330) in its normally operating position; however, the present invention is not limited thereto. For example, the fixing part 58 may not be included, and the detector 30 may be fixed in its normally operating position by continuously applying the driving force of the drive part 51.

[0146] Furthermore, in the first and third embodiments described above, examples were shown in which the moving speed of the detection unit 30 (330) was attenuated by utilizing the viscous resistance of the fluid filled inside the damping part 55 (attenuation part), but the present invention is not limited thereto. For example, the attenuation part may also be configured to attenuate the moving speed by utilizing friction.

[0147] Furthermore, the following example is shown: In the first and third embodiments described above, a drive unit 51, which is a solenoid drive unit, is provided as the drive unit that moves the detection unit 30 (330) in a direction away from the wire rope W. In the second embodiment, a motor 251 is provided, but the present invention is not limited thereto. In the present invention, actuators other than solenoid drive units and motors may also be provided. For example, actuators such as pneumatic cylinders, hydraulic cylinders, and water cylinders may also be provided.

[0148] Furthermore, in the first and third embodiments described above, an example was shown where the damping part 55 has a gear part 55a that rotates while meshing with the teeth of the rack parts 56a and 56b, and the rotational speed of the gear part 55a is reduced; however, the present invention is not limited thereto. For example, a linearly moving cylindrical oil damper may be connected to the first part 30a (330a) and the second part 30b (330b), respectively.

[0149] Furthermore, in the second embodiment described above, an example is shown where, when the detection unit 30 moves toward the wire rope W under the force applied by the force-applying unit 54, the motor 251 reduces the moving speed of the detection unit 30 by rotating at a limited speed in a direction opposite to the rotation direction (u direction). However, the present invention is not limited to this. For example, it may be configured such that a damping unit is provided to reduce the moving speed, thereby causing the motor 251 to idle when the detection unit 30 moves toward the wire rope W under the force applied by the force-applying unit 54. In this case, a one-way clutch may not be provided.

[0150] Furthermore, in the first to third embodiments described above, an example was shown of a position detection unit 57 equipped with a mechanical switch for detecting when the detection unit 30 (330) is positioned in a normal operating position, but the present invention is not limited thereto. For example, the position detection unit 57 may not be composed of a mechanical switch, but rather a non-contact optical sensor. In addition, when the drive unit is a motor, control can be performed in such a way that the position detection unit 57 is not provided, but the normal operating position is determined by controlling the number of rotations performed.

[0151] Furthermore, in the first to third embodiments described above, an example of inspecting the steel wire rope W of the elevator 103 was shown, but the present invention is not limited thereto. For example, it may also be configured to inspect the steel wire rope of equipment other than elevators, such as cranes and cableways.

[0152] Furthermore, in the first to third embodiments described above, examples of detecting the magnetic flux of the wire rope W using the total flux method were shown, but the present invention is not limited thereto. For example, the detection unit 30 (330) may also be configured to detect leakage magnetic flux from the outer surface of the wire rope W.

[0153] Furthermore, in the first to third embodiments described above, examples were shown where the two detection coils 31a and 31b of the detection unit 30 (330) were each an independent saddle-type coil, but the present invention is not limited thereto. For example, the detection unit 30 (330) may also be configured to form a solenoid coil by combining the first part 30a (330a) and the second part 30b (330b) in such a way that it is wound around the wire rope W.

[0154] Furthermore, in the first to third embodiments described above, an example was shown in which the excitation coil 21 was wound around the outside of the detection coils 31a and 31b relative to the wire rope W, but the present invention is not limited thereto. For example, the excitation part 20 and the detection part 30 (330) may also be arranged along the direction in which the wire rope W extends.

[0155] Furthermore, in the first to third embodiments described above, an example was shown where the magnetic field application unit 10 and the excitation unit 20 were fixed to the housing 101a and the detection unit 30 (330) was fixed to the drive mechanism 50 in a movable manner, but the present invention is not limited thereto. For example, it is also possible to configure not only the detection unit 30 (330) to be movable, but also the magnetic field application unit 10 or the excitation unit 20 to be movable so that the distance from the wire rope W can be changed during inspection operation and normal operation.

[0156] Furthermore, in the first to third embodiments described above, an example was shown where the detection signal acquired by the detection unit 30 (330) of the wire rope inspection device 101 (201, 301) was output to the outside of the device (processing device 102) via the communication unit 43, but the present invention is not limited thereto. For example, it may be configured such that a notification unit or display unit is provided in the wire rope inspection device, thereby notifying the inspection operator of the detection result (inspection result) based on the signal from the detection unit in the wire rope inspection device.

[0157] Furthermore, in the first to third embodiments described above, an example was shown where magnetic field applying parts 10a and 10b, which are arranged to face each other across the wire rope W, are configured with their N poles facing the wire rope W. However, the present invention is not limited to this. For example, the two magnetic field applying parts may be configured with their N poles and S poles facing the wire rope W, respectively. Alternatively, the two magnetic field applying parts may be configured with their N poles and S poles arranged along the direction in which the wire rope W extends, rather than along a direction facing each other. In this case, the two magnetic field applying parts may have the same orientation or different orientations. Alternatively, the magnetic field applying parts may be configured to apply a magnetic field in an orientation that is obliquely offset from an orientation parallel to the direction in which the wire rope W extends. Alternatively, one magnetic field applying part may be configured on one side in a direction intersecting the direction in which the wire rope W extends. Alternatively, magnetic flux may be detected without providing a magnetic field applying part and without adjusting the magnetic field.

[0158] Furthermore, in the first to third embodiments described above, an example was shown where the magnetic field application section 10 was composed of a permanent magnet, but the present invention is not limited thereto. For example, the magnetic field application section may also be composed of an electromagnet.

[0159] Furthermore, in the first to third embodiments described above, examples were shown where detection coils 31a and 31b were provided on each of the four steel wire ropes W, but the present invention is not limited thereto. For example, the detection coils can be configured to detect the magnetic flux of one or more but less than three steel wire ropes W, or they can be configured to detect the magnetic flux of five or more steel wire ropes. Alternatively, one detection coil can be used to detect the magnetic flux of multiple steel wire ropes W.

[0160] Furthermore, in the first to third embodiments described above, an example was shown where the distance between the detection unit 30 (330) and the wire rope W was changed by switching the operating mode of the elevator 103 based on input operations to the processing device 102; however, the present invention is not limited to this. In the present invention, the distance between the detection unit 30 (330) and the wire rope W can also be changed based on input operations by the operator to buttons or the like provided on the wire rope inspection device.

[0161] Furthermore, in the third embodiment described above, an example is shown in which inclined surfaces 332a and 332b for contacting the foreign object Wa are respectively provided in the first portion 330a and the second portion 330b of the detection unit 330, but the present invention is not limited thereto. For example, it may also be configured such that an inclined surface is provided in either the first portion 330a or the second portion 330b of the detection unit 330.

[0162] Furthermore, in the third embodiment described above, an example is shown in which the detection unit 330 is moved by a drive unit 51 of a solenoid drive unit, which is configured in the same way as in the first embodiment, and the detection unit 330 is provided with inclined surfaces 332a and 332b for contacting foreign objects. However, the present invention is not limited to this. For example, it is also possible to use a motor to move the detection unit, as in the second embodiment, and to provide inclined surfaces on the detection unit.

[0163] Furthermore, in the third embodiment described above, an example is shown where the first portion 330a and the second portion 330b of the detection unit 330 move away from the wire rope W by contacting a foreign object Wa attached to the outer surface of the wire rope W through inclined surfaces 332a and 332b. However, the present invention is not limited to this. For example, it may also be configured such that the first and second portions move away from the wire rope W not only by contacting the foreign object Wa attached to the outer surface of the wire rope W, but also by contacting abnormal portions of the wire such as protrusions or kinks from the outer surface of the wire rope W.

[0164] [Way]

[0165] Those skilled in the art will understand that the exemplary embodiments described above are specific examples of the following approaches.

[0166] (Project 1)

[0167] A wire rope inspection device, comprising:

[0168] The excitation unit applies magnetic flux to the wire rope being inspected.

[0169] A detection unit that detects the magnetic flux of the wire rope to which the excitation unit applies magnetic flux;

[0170] A force-applying part, which uses elasticity to apply a force to the detection part in a direction approaching the wire rope until the detection part reaches the inspection position, the inspection position being the position in which the detection part is positioned during inspection operation to inspect the wire rope; and

[0171] A drive unit that moves the detection unit away from the wire rope to a normal operating position for configuring the detection unit during normal operation.

[0172] (Project 2)

[0173] According to the wire rope inspection device described in Project 1, among which,

[0174] The detection unit includes a first portion disposed on one side in a direction orthogonal to the extension direction of the wire rope, and a second portion disposed on the other side.

[0175] The force-applying part is configured to apply force to the first part and the second part in a manner that brings them closer together until the first part and the second part reach the inspection position.

[0176] (Project 3)

[0177] According to the wire rope inspection device described in Project 2, among which,

[0178] The drive unit is configured to move the first part and the second part by a distance equal to the distance separated from the wire rope.

[0179] (Project 4)

[0180] According to the wire rope inspection device described in item 2 or 3, among which,

[0181] The first part and the second part are configured to be positioned in the inspection position in a state where they are abutted against each other by being forced by the force-applying part.

[0182] (Project 5)

[0183] According to the wire rope inspection device described in any of items 2 to 4, among which,

[0184] The detection unit is configured to detect the magnetic flux of the moving wire rope while the wire rope is moving along its extension direction.

[0185] The first portion and the second portion are configured to surround the wire rope at the inspection position, and the first portion and the second portion have inclined surfaces on the face facing the wire rope that are configured to extend in a direction away from the wire rope on the upstream side of the wire rope.

[0186] (Project 6)

[0187] According to the wire rope inspection device described in any one of items 1 to 5, among which,

[0188] It also includes a fixing part that fixes the detection part in the state of being configured in the normal operating position.

[0189] (Project 7)

[0190] According to the wire rope inspection device described in any one of items 1 to 6, among which,

[0191] It also includes an attenuation section, which attenuates the moving speed of the detection section when the detection section moves toward the wire rope by being forced by the force-applying section.

[0192] (Project 8)

[0193] According to the wire rope inspection device described in Project 7, among which,

[0194] The drive unit includes a solenoid-type drive unit that uses an electric current to generate a magnetic field to move the detection unit away from the wire rope.

[0195] The attenuation section includes a damping section, which attenuates the movement speed of the probe by utilizing the viscous resistance of the fluid filling the interior of the damping section when the probe moves toward the wire rope by being forced by the force-applying section.

[0196] (Project 9)

[0197] According to the wire rope inspection device described in Project 8, among which,

[0198] It also includes a rack portion, which has teeth and extends in a straight line.

[0199] The damping section has a gear section that rotates while meshing with the teeth of the rack section, and is configured to reduce the rotational speed of the gear section.

[0200] The rack portion is configured such that one end is fixed to the probe portion, and the other end meshes with the gear portion of the damping portion.

[0201] (Project 10)

[0202] According to the wire rope inspection device described in Project 7, among which,

[0203] The drive unit includes a motor that moves the detection unit away from the wire rope by rotating it in a rotational direction.

[0204] The motor is configured to control the speed, and when the detection unit moves toward the wire rope by being forced by the force-applying unit, the motor also acts as a damping unit to reduce the moving speed of the detection unit by rotating at a limited speed in another rotation direction opposite to the first rotation direction.

[0205] (Project 11)

[0206] According to the wire rope inspection device described in Project 10, among which,

[0207] It also features a one-way clutch connected to the rotating shaft of the motor.

[0208] The one-way clutch is configured to rotate together with the rotating shaft of the motor when the motor applies a driving force to the detection part in a direction away from the wire rope, and to idle relative to the rotating shaft of the motor when the motor applies a driving force to the detection part in a direction closer to the wire rope.

[0209] (Project 12)

[0210] According to any one of items 1 to 11, the wire rope inspection device, wherein,

[0211] It also includes a position detection unit, which is used to detect when the detection unit is configured in the normal operating position.

[0212] (Project 13)

[0213] According to the wire rope inspection device described in any one of items 1 to 12, among which,

[0214] The detection unit is configured to detect the magnetic flux of the moving wire rope when the wire rope installed in the elevator moves along the direction of its extension due to the drive of the elevator.

[0215] The force-applying part is configured to apply force to the detection part until the detection part reaches the inspection position for positioning the detection part during inspection operation of the elevator when the moving speed of the wire rope relative to the detection part is relatively small.

[0216] The drive unit is configured to move the detection unit to the normal operating position for configuring the detection unit during normal operation of the elevator when the moving speed of the wire rope relative to the detection unit is relatively large.

[0217] (Project 14)

[0218] According to the wire rope inspection device described in any one of items 1 to 13, among which,

[0219] It also includes a magnetic field applying unit, which pre-applies a magnetic field to the wire rope to adjust the direction of the wire rope's magnetization.

[0220] The excitation unit includes an excitation coil, which excites the magnetized state of the wire rope after a magnetic field has been pre-applied by the magnetic field application unit.

[0221] The detection unit includes a detection coil wound around the wire rope along its extension direction. The detection coil detects the magnetic flux of the wire rope, which is magnetized by the excitation coil, using the total flux method.

[0222] The force-applying part is configured to apply force to the detection coil using elasticity until the detection coil reaches the inspection position.

[0223] The drive unit is configured to move the detection coil to the normal operating position.

Claims

1. A wire rope inspection device, comprising: The excitation unit applies magnetic flux to the wire rope being inspected. A detection unit that detects the magnetic flux of the wire rope to which the excitation unit applies magnetic flux; The force-applying part applies a force to the detection part in a direction close to the wire rope by using elasticity, causing the detection part to move until the detection part reaches the inspection position, which is a position for configuring the detection part in a way that does not contact the wire rope during the inspection operation of inspecting the wire rope. as well as A drive unit moves the detection unit away from the wire rope to a normal operating position for configuring the detection unit during normal operation. The detection unit includes a first portion disposed on one side in a direction orthogonal to the extension direction of the wire rope, and a second portion disposed on the other side. The force-applying part applies force to the first part and the second part using elasticity, causing the first part and the second part to move until the first part and the second part reach the inspection position.

2. The wire rope inspection device according to claim 1, wherein, The force-applying part is configured to apply force to the first part and the second part in a manner that brings them closer together until the first part and the second part reach the inspection position.

3. The wire rope inspection device according to claim 2, wherein, The drive unit is configured to move the first part and the second part by a distance equal to the distance separated from the wire rope.

4. The wire rope inspection device according to claim 2 or 3, wherein, The first part and the second part are configured to be positioned in the inspection position in a state where they are abutted against each other by being forced by the force-applying part.

5. The wire rope inspection device according to claim 2, wherein, The detection unit is configured to detect the magnetic flux of the moving wire rope while the wire rope is moving along its extension direction. The first portion and the second portion are configured to surround the wire rope at the inspection position, and the first portion and the second portion have inclined surfaces on the face facing the wire rope that are configured to extend in a direction away from the wire rope on the upstream side of the wire rope.

6. The wire rope inspection device according to claim 1, wherein, It also includes a fixing part that fixes the detection part in the state of being configured in the normal operating position.

7. The wire rope inspection device according to claim 1, wherein, It also includes a position detection unit, which is used to detect when the detection unit is configured in the normal operating position.

8. The wire rope inspection device according to claim 1, wherein, The detection unit is configured to detect the magnetic flux of the moving wire rope when the wire rope installed in the elevator moves along the direction of its extension due to the drive of the elevator. The force-applying part is configured to apply force to the detection part until the detection part reaches the inspection position for positioning the detection part during inspection operation of the elevator when the moving speed of the wire rope relative to the detection part is relatively small. The drive unit is configured to move the detection unit to the normal operating position for configuring the detection unit during normal operation of the elevator when the moving speed of the wire rope relative to the detection unit is relatively large.

9. The wire rope inspection device according to claim 1, wherein, It also includes a magnetic field applying unit, which pre-applies a magnetic field to the wire rope to adjust the direction of the wire rope's magnetization. The excitation unit includes an excitation coil, which excites the magnetized state of the wire rope after a magnetic field has been pre-applied by the magnetic field application unit. The detection unit includes a detection coil wound around the wire rope along its extension direction. The detection coil detects the magnetic flux of the wire rope, which is magnetized by the excitation coil, using the total flux method. The force-applying part is configured to apply force to the detection coil using elasticity until the detection coil reaches the inspection position. The drive unit is configured to move the detection coil to the normal operating position.

10. A wire rope inspection device, comprising: The excitation unit applies magnetic flux to the wire rope being inspected. A detection unit that detects the magnetic flux of the wire rope to which the excitation unit applies magnetic flux; The force-applying part applies a force to the detection part in a direction close to the wire rope by using elasticity, causing the detection part to move until the detection part reaches the inspection position, which is a position for configuring the detection part in a way that does not contact the wire rope during the inspection operation of inspecting the wire rope. as well as A drive unit moves the detection unit away from the wire rope to a normal operating position for configuring the detection unit during normal operation. It also includes an attenuation section, which attenuates the moving speed of the detection section when the detection section moves toward the wire rope by being forced by the force-applying section.

11. The wire rope inspection device according to claim 10, wherein, The drive unit includes a solenoid-type drive unit that uses an electric current to generate a magnetic field to move the detection unit away from the wire rope. The attenuation section includes a damping section, which attenuates the movement speed of the probe by utilizing the viscous resistance of the fluid filling the interior of the damping section when the probe moves toward the wire rope by being forced by the force-applying section.

12. The wire rope inspection device according to claim 11, wherein, It also includes a rack portion, which has teeth and extends in a straight line. The damping section has a gear section that rotates while meshing with the teeth of the rack section, and is configured to reduce the rotational speed of the gear section. The rack portion is configured such that one end is fixed to the probe portion, and the other end meshes with the gear portion of the damping portion.

13. The wire rope inspection device according to claim 10, wherein, The drive unit includes a motor that moves the detection unit away from the wire rope by rotating it in a rotational direction. The motor is configured to control the speed, and when the detection unit moves toward the wire rope by being forced by the force-applying unit, the motor also acts as a damping unit to reduce the moving speed of the detection unit by rotating at a limited speed in another rotation direction opposite to the first rotation direction.

14. The wire rope inspection device according to claim 13, wherein, It also features a one-way clutch connected to the rotating shaft of the motor. The one-way clutch is configured to rotate together with the rotating shaft of the motor when the motor applies a driving force to the detection part in a direction away from the wire rope, and to idle relative to the rotating shaft of the motor when the motor applies a driving force to the detection part in a direction closer to the wire rope.

Images