JP5654737B2 - Cord inspection device - Google Patents

Description

  The present invention relates to a cord inspection apparatus for inspecting the appearance of a cord or rope, or a cord or rope such as a chain or wire rope.

  As the cord inspection apparatus, an apparatus for inspecting a cord by providing a light projecting part and a light receiving part on both sides of a wire rope has already been proposed.

  The light projecting unit is configured to irradiate the surface of the wire rope with a light beam from the laser light source, and the light that has reached the back side of the wire rope among the irradiated light is arranged on the back side of the wire rope. Light is received by the light receiving unit. And the outer diameter of a wire rope can be calculated | required by calculating | requiring the light which was not able to be received by the said light-receiving part, ie, the part which was interrupted by the wire rope, and became a shadow. And it is comprised so that the damage condition of a wire rope may be grasped | ascertained by comparing the value of the calculated | required outer diameter with the value of the preset outer diameter (for example, refer patent document 1).

JP 2008-214037 A (see FIGS. 1 to 4)

  However, with the proposed cord inspection device, although the damage status due to the expansion and contraction of the wire rope can be grasped based on the obtained outer diameter value, the damage on the surface of the wire rope that does not affect the expansion and contraction is considered. I can't figure it out. That is, in the imaging on the back surface side of the wire rope, for example, it is impossible to image a scratch or disconnection on the front surface side of the wire rope, so that there is a disadvantage that an accurate appearance inspection cannot be performed.

  Moreover, since the cable body inspection apparatus by the said proposal is not equipped with the means for grasping | ascertaining the defective location where the wire rope is damaged, it can only grasp the defective location of the wire rope only roughly. In addition, there is a disadvantage that the defective portion cannot be immediately confirmed by visual observation.

  Therefore, the present invention has been made in view of such a situation, and the place to be solved is a cord inspection that can accurately check the appearance of the cord and can immediately confirm the defective portion. To provide an apparatus.

That is, a cord inspection apparatus according to the present invention is a cord inspection apparatus for inspecting the appearance of a cord moving by being sent out or wound up in order to solve the above-described problem. Inspection start position detecting means for detecting the inspection start position, movement amount measuring means for measuring the movement amount of the cord changing with the movement of the cord, and inspection start detected by the inspection start position detecting means An inspection position calculating means for calculating an inspection position in the cord from the position and a moving amount measurement value measured by the moving amount measuring means, and each time a predetermined amount of movement of the cord is detected by the moving amount measuring means Imaging means for imaging the surface of the cord, storage means for storing an image captured by the imaging means in association with the inspection position, and image processing for sequentially processing images sequentially stored by the storage means Means and Based on the processed image by the image processing means, is characterized in that a quality determination unit for determining the acceptability of the appearance of the wick member.

In addition, the cord inspection apparatus according to the present invention is a cord inspection apparatus that inspects the appearance of a fixed-side cord that moves and supports a moving moving object. An inspection start position detecting means for detecting an inspection start position, a movement amount measuring means for measuring a movement amount of the moving body that changes as the moving body moves, and an inspection start position detected by the inspection start position detecting means; The inspection position calculation means for calculating the inspection position in the cord-like body from the movement amount measurement value measured by the movement amount measurement means, and the predetermined movement amount of the moving body is attached to the moving movable body by the movement amount measurement means. Image pickup means for picking up the surface of the cord-like body each time it is detected, storage means for storing the image picked up by the image pickup means in association with the inspection position, and sequentially processing images stored in the storage means You An image processing unit, based on the processed image by the image processing means, is characterized in that a quality determination unit for determining the acceptability of the appearance of the wick member.

  According to these configurations, the surface of the cord-like body is imaged by the imaging means, the captured image is processed by the image processing means, and the appearance of the cord-like body (specifically, the surface is described in detail) Is determined by the quality determination means.

  Here, when the cord inspection apparatus according to the present invention determines that the defect is determined to be defective by the quality determination means, the inspection position corresponding to the image is searched from the information stored in the storage means, It is preferable that the configuration further includes a defective portion specifying means for specifying a defective portion in the cord based on the search result.

  According to such a configuration, when the pass / fail judgment means determines that the image is defective, the inspection position corresponding to the image is searched from the information stored in the storage means, and the defect in the cord-like body is determined based on the search result. The location can be specified automatically.

  In the cable inspection apparatus according to the present invention, the movement amount measuring means is attached to a rotating shaft of a rotating body that rotates in contact with the cable, and the number of pulses corresponding to the amount of rotation of the rotating shaft. The image pickup means may be configured to take an image in synchronization with an output pulse from the rotary encoder.

  As described above, if it is configured to perform imaging by the imaging unit in synchronization with the output pulse from the rotary encoder, the imaging timing by the imaging unit can be controlled in accordance with the amount of movement of the cord. Especially in the acceleration section from the start of raising and lowering to the constant speed operation and the deceleration section that stops raising and lowering from the constant speed operation like an elevator, even if the moving speed of the cord changes with time, The inspection interval in the moving direction can always be kept constant.

  The cord inspection apparatus according to the present invention further includes light irradiation means for irradiating the cord with light, and the light irradiated on the cord by the light irradiation means reflects the surface of the cord. The reflected light may be received by the imaging means.

  Furthermore, in the cord inspection apparatus according to the present invention, the light irradiation unit may be a unit that irradiates the cord with near infrared rays.

As described above, if the light irradiating means is composed of means for irradiating the cord with near infrared rays, the irradiated near infrared light is transmitted through a layer of oil such as grease adhering to the surface of the cord. Therefore, there is an advantage that an image of the surface of the cord-like body can be taken accurately.
Further, the cord inspection apparatus according to the present invention counts the pulses output from the rotary encoder, and when the count reaches a preset number, the imaging means Imaging timing may be set.

  In the cord inspection apparatus according to the present invention, the surface of the cord is imaged by the imaging unit, the captured image is processed by the image processing unit, and the cord is processed based on the processed image. By determining the quality of the appearance by the quality determination means, the appearance inspection of the cord can be performed with high accuracy, and if it is determined to be defective, the inspection position corresponding to the image is stored in the storage means. By searching from the information that has been made, it is possible to artificially or automatically identify the defective part in the cord, so it is also possible to immediately check by visual inspection and check the defective part of the actual cord it can.

1 is a schematic diagram of an elevator apparatus to which a cord inspection apparatus according to the present invention is applied. The block diagram of the same cord inspection apparatus is shown. The explanatory view of the way of thinking which calculates the inspection position of a wire rope is shown. It is the concrete structure for imaging the image of a wire rope, Comprising: (a) is the side view, (b) shows the top view. It is the external appearance of a wire rope and the image processing data corresponding to it, Comprising: (a), (b) shows the 1st example in the case of a defect, (c), (d) shows the 2nd in the case of a defect. An example is shown, and (e) and (f) show a case where it is good. 1 is a schematic diagram of a ropeway to which a cord inspection apparatus according to the present invention is applied. The graph created based on the value obtained by Fourier-transforming the waveform of a wire rope is shown.

  Hereinafter, as a first embodiment of a cord inspection apparatus according to the present invention, an example applied to an elevator apparatus as shown in FIG. 1 will be described. However, the present invention is not limited to this, and can be applied to the inspection of the appearances of various moving cords, for example, wire ropes, strings, ropes, chains, and the like.

  The elevator apparatus is disposed as a car 1 that can be moved up and down in the hoistway, and is disposed at the upper part of the hoistway so as to be rotatable and fixed as a rotating body around which the wire rope R is wound. A pulley 2 and a winding machine 3 that winds or feeds the wound wire rope R by winding or feeding the wound wire rope R are provided.

  Further, as shown in FIGS. 1 and 2, the cord inspection apparatus includes an inspection start position detection means 10 that detects an inspection start position of the wire rope R, and the wire that changes as the wire rope R moves. The inspection position in the wire rope R is calculated from the movement amount measuring means 11 for measuring the movement amount of the rope R, the inspection start position detected by the inspection start position detecting means 10 and the movement amount measurement value measured by the movement amount measuring means 11. The inspection position calculating means 12, the imaging means 5 which is arranged in the machine room M on the top floor, for example, images the surface of the wire rope R, and the imaging means 5 captures images in synchronization with the movement amount of the wire rope R. Storage means 13 for storing an image in association with the inspection position, image processing means 14 for sequentially processing images sequentially stored in the storage means 13, and the image processing Based on the image processed by the means 14, the quality determination means 15 for determining the quality of the appearance of the wire rope R, and the inspection position corresponding to the image when the quality determination means 15 determines that the wire rope R is defective. Searching from the information stored in the storage means 13, a failure location specifying means 16 for specifying a failure location in the wire rope R based on the search result is provided.

  The inspection start position detection means 10, the movement amount measurement means 11, the inspection position calculation means 12, the storage means 13, the image processing means 14, the pass / fail judgment means 15 and the defective portion identification means 16 are constituted by a computer or the like. A control unit U is configured, and this control unit U inputs and outputs signals between a rotary encoder 4, an imaging unit 5, and a light irradiation unit 7 described below. 1 is a support plate for supporting the hoisting machine 3, the image pickup means 5, the control unit U, and the like, and has an insertion hole 6A through which the wire rope R can be inserted into the support plate 6. Forming.

  For example, when the inspection end position detecting means 10 sets the attachment end of the wire rope R to the car 1 as the origin in the longitudinal direction of the wire rope R, the position of the car 1 at which the car 1 is stopped at the start of the inspection. Based on the information, it is a means for detecting the length of the wire rope R from the origin to the position of the imaging means 5. In order to detect the position where the car 1 is stopped, information from the operation control panel of the elevator apparatus may be taken in, or a sensor for detection may be used.

  The movement amount measuring means 11 includes a rotary encoder 4 attached to the rotary shaft 2A of the fixed pulley 2, and the movement of the wire rope R from the number of output pulses output from the rotary encoder 4 according to the rotation amount of the rotary shaft 2A. Measure the amount. That is, the rotary encoder 4 is attached to the rotary shaft 2A of the fixed pulley 2 and has a disc having slits arranged at equal intervals on the circumference, and a light emitting element and a light receiving element facing each other with the disc interposed therebetween. The light emitted from the light emitting element is received by the light receiving element through the slit, and a periodic signal synchronized with the rotation angle of the rotating shaft 2A of the fixed pulley 2 is output from the received light receiving element. The movement amount measuring means 4 measures the movement amount of the wire rope R from the number of output pulses by shaping the waveform of the output signal and outputting a pulse signal composed of, for example, a rectangular wave to the control unit U. Can be done.

  Further, the movement amount measuring means 11 can determine the rotation direction of the rotating shaft 2 </ b> A of the fixed pulley 2 from the pulse pattern from the rotary encoder 4. That is, since the rotary encoder 4 is configured to output an A-phase pulse and a B-phase pulse whose output phases are shifted by 90 degrees, the movement amount measuring means 4 depends on which one of the pulses is output first. Can grasp the pulse pattern, and can determine the rotation direction of the rotating shaft 2A of the fixed pulley 2 from the grasped pulse pattern.

  The inspection position calculation means 12 calculates the amount of rotation of the rotating shaft 2A of the fixed pulley 2 from the number of output pulses from the rotary encoder 4, and the rotation direction of the rotating shaft 2A of the fixed pulley 2 from the pulse pattern of the output pulses. Is a means for calculating the inspection position in the wire rope R from the rotation amount and direction and the inspection start position detected by the inspection start position detection means 10. This will be specifically described with reference to FIG. The stop position of the car 1 at the start of the inspection can be obtained from an elevator operation control panel (not shown), for example, information that the car 1 is stopped on the first floor. When the attachment end of the wire rope R to the car 1 is set as the origin R0 in the longitudinal direction of the wire rope R, for example, the wire from the origin R0 to the imaging means 5 when the car 1 is stopped on the first floor The length of the rope R can be obtained from the design information of the elevator facility, and this is set as the inspection start position X0. In such a case, the inspection position X1 when the car 1 is lowered by the movement amount L1 is X0 + L1, and conversely, the inspection position X2 when the car 1 is raised by the movement amount L2 is X0-L2.

  As shown in FIGS. 4A and 4B, the imaging means 5 is a line sensor camera that scans in a horizontal direction (left and right lateral direction) orthogonal to the moving direction (vertical direction) of the wire rope R. is there. The viewing angle α of the line sensor camera 5 is set so that the four wire ropes R can be imaged, and one of the two line sensor cameras 5 and 5 is arranged in front of the four wire ropes R. However, the other is arranged behind the four wire ropes R in a state of being displaced in the vertical direction from the front line sensor camera 5.

  The line sensor camera 5 captures an image in synchronism with the output pulse from the rotary encoder 4 as described above, and the scanning timing is controlled so as to capture an image for every certain amount of movement of the wire rope R. Therefore, even when the moving speed of the wire rope R changes with the passage of time in the acceleration section from the start of raising and lowering to the constant speed operation and the deceleration section from the constant speed operation to the stop of raising and lowering as in an elevator, the wire rope The inspection interval in the moving direction of R can always be kept constant.

  That is, the line sensor camera 5 is provided with a synchronization unit that synchronizes the imaging timing with the output pulse so as to perform imaging by the imaging unit 5 in synchronization with the output pulse from the rotary encoder 4. Imaging can be performed at constant distance intervals regardless of changes in the moving speed. The output pulses from the rotary encoder 4 are counted, and when the number reaches n (n is an arbitrary number of 1 or more set in advance), the first imaging is performed. The number of output pulses is counted again from 1 after imaging, and when the count reaches n, the second imaging is performed, that is, every time n output pulses are counted, imaging is performed once. The imaging timing may be set in

  The storage means 13 is composed of a memory provided in a computer, for example. Then, the control unit U stores the image of the wire rope R imaged by the imaging unit 5 in the memory 13 in association with the inspection position. More specifically, the memory 13 is provided with a memory area including a predetermined area range for recording the information in advance, and the control unit U writes the information in order from the top of the area. In addition, when the area becomes full (there is no free space where new information can be additionally recorded), a method of overwriting the recorded information in the oldest order (cyclical update) is adopted. Therefore, it is preferable to copy information to a storage medium such as a hard disk (HD), a floppy disk (FD), or a reader / writer (R / W) capable of reading and writing periodically or when a defect is detected. The storage means 13 is not limited to a memory, and various known storage media can be employed.

  The image processing unit 14 sequentially processes the images sequentially stored by the storage unit 13. Here, the data (waveform) obtained by imaging one wire rope R by the line sensor camera 5 and image processing by the image processing means 14 is shown in FIGS. 5B, 5D, and 5F, respectively. Yes. This is a binary value obtained by performing image processing on the output from the imaging means 5 (corresponding to the waveform represented when the luminance value is taken on the vertical axis and the inspection position on the scanning line of the wire rope R is taken on the horizontal axis). This binarized data is expressed as a characteristic waveform level.

  The quality determination means 15 compares the waveform processed by the image processing means 14 with the waveform of the normal wire rope R stored in advance, and determines that it is good if it is within an allowable range, If it is out of the allowable range, it is judged as defective.

  When the defect location specifying unit 16 determines that the defect is determined to be defective by the pass / fail determination unit 15, the information stored in the storage unit 16 as described above (the captured image) is the inspection position corresponding to the image. Is stored in association with the inspection position), and the defective portion of the wire rope R is specified based on the search result.

  Note that the cord inspection apparatus according to the present embodiment includes the light irradiation means 7 that irradiates the wire rope R with light. As shown in FIGS. 4 (a) and 4 (b), the light irradiation means 7 is a pair of upper and lower lights arranged on the wire rope R side of the line sensor camera 5 and above and below the line sensor camera 5. It consists of instruments 7A and 7B. The lighting fixtures 7A and 7B are configured in a horizontally long shape across the four wire ropes R so as to irradiate all the four wire ropes R arranged in parallel in the horizontal direction.

  Therefore, the light irradiated on the front and back surfaces of the wire rope R by the pair of upper and lower lighting fixtures 7A and 7B respectively disposed on the front and rear surfaces reflects the front and back surfaces of the wire rope R, and the reflected light travels back and forth. The arranged line sensor cameras 5 and 5 receive light respectively.

  Moreover, since the said lighting fixtures 7A and 7B are comprised from the halogen lamp which irradiates near-infrared rays to the wire rope R, the layer of grease, such as grease adhering to the wire rope R surface, permeate | transmits by near-infrared rays. be able to. Therefore, there is an advantage that an image of the surface of the wire rope R can be taken accurately.

  Next, a procedure for inspecting the surface of the wire rope R using the cord inspection apparatus configured as described above will be described.

  First, when the elevator apparatus starts the raising / lowering operation, imaging by the imaging means 5 is performed in synchronization with the movement amount of the car 1 (movement amount of the wire rope R), that is, the output pulse from the rotary encoder 4. Each image is output to the control unit U every time it is photographed and stored in the storage means 13. At this time, the position information of the wire rope R at the time when each image is photographed is associated. Stored in state. Specifically, each image photographed at regular intervals with respect to the length direction of the wire rope R, the position information of the wire rope R at the time of photographing is grasped by the inspection position calculation means 12, for example, , “Image of frame number p: inspection position X of wire rope R” is stored in the storage means 13 with a conceptual data structure.

  Here, the control unit U performs image processing on each image by the image processing unit 14, and determines pass / fail by the pass / fail determination unit 15 for each image processed. If the pass / fail determination means 15 determines that the image is defective, the inspection position corresponding to the image is searched from the information stored in the storage means 13, and the defective location in the wire rope R is determined based on the search result. After the identification, the defective portion and the image thereof are displayed on a display unit (not shown) such as a monitor. At this time, the alarm device 8 shown in FIG. 2 is operated to notify the inspector.

  When the alarm device 8 is activated, the inspector recognizes that there is a defective portion on the wire rope R of the elevator device, and confirms the image of the wire rope R on the display unit, and whether or not there is urgency. Judging. When the inspector determines that there is urgency, the elevator apparatus is immediately stopped, and then the defective portion is actually inspected, and if it is determined that repair is necessary, repair work is performed. In addition, if the inspector determines that there is no urgency, after the day of operation of the elevator is over, the inspected part is actually inspected in the same manner as described above, and if the repair is necessary, the repair work is performed. I do.

  The determination of the defective portion will be described with reference to FIGS. 5 (a) and 5 (b) and FIGS. 5 (c) and 5 (d).

  FIG. 5A shows a case where defective portions are generated at two locations in the width direction of the wire rope R, in the center and at the right end in the figure. Specifically, a case is shown in which an inverted triangular hole 20 is generated at the center, and a part of the wire rope R is unwound and the wire 21 protrudes to the outside at the right end.

  And the data (waveform) which imaged the surface of the wire rope R shown to Fig.5 (a), and image-processed by the image processing means 14 is shown in FIG.5 (b). On the other hand, the external appearance of the wire rope R and the image processing data corresponding thereto are shown in FIGS. 5 (e) and 5 (f).

  According to FIG. 5 (b), the waveform is greatly disturbed at two portions in the width direction of the wire rope R, that is, at the portions corresponding to the two portions of the hole 20 generated in the wire rope R and the protruding wire 21. Compared with the normal waveform of 5 (f), it is determined that the control unit U is defective.

  Further, as a second example, as shown in FIG. 5C, a case where a vertically long hole 22 which is a defective portion is generated at one place on the right side in the width direction of the wire rope R is shown.

  And the data (waveform) which imaged the surface of the wire rope R shown in FIG.5 (c) and image-processed by the image processing means 14 is shown in FIG.5 (d). On the other hand, the external appearance of the wire rope R and the image processing data corresponding thereto are shown in FIGS. 5 (e) and 5 (f).

  According to FIG. 5 (d), the waveform is greatly disturbed in one place of the hole 22 generated in the wire rope R, and the control unit U is defective as compared with FIG. 5 (f). It comes to judge. Note that the determination example for determining a defect is not limited to the illustrated example, and the determination criterion can be changed by freely setting.

  As described above, according to the elevator apparatus to which the cord inspection apparatus according to the present embodiment is applied, the surface of the wire rope R is imaged by the imaging unit 5, and the captured image is processed by the image processing unit 14. By determining whether the appearance of the cord-like body is good or bad based on the obtained image, the appearance inspection of the wire rope R can be accurately performed, and if it is determined to be defective, the image By searching from the information stored in the storage means 13 for the inspection position corresponding to, it is possible to automatically identify the defective part in the wire rope R. Visual inspection can be performed immediately.

  Moreover, according to the elevator apparatus to which the cable body inspection apparatus according to the present embodiment is applied, the surface of the wire rope R is photographed at regular intervals according to the amount of movement of the wire rope R. Regardless of the moving speed, the wire rope R can be inspected uniformly along the longitudinal direction.

  Next, as a second embodiment of the cord inspection apparatus according to the present invention, an example applied to a ropeway will be described as shown in FIG. That is, in the first embodiment, the imaging unit 5 is fixed, and the moving wire rope R is imaged by the imaging unit 5 to perform the appearance inspection of the wire rope R. However, the present embodiment moves. This is an example of a cord inspection apparatus that inspects the appearance of a fixed cord-like body that moves and supports a moving body from the side of the moving body.

  The cord inspection apparatus according to the present embodiment includes an inspection start position detection unit that detects an inspection start position of the cord at the start of movement of the mobile body, and movement of the mobile body that changes as the mobile body moves. Movement amount measuring means for measuring the amount, inspection position calculating means for calculating the inspection position in the cord from the inspection start position detected by the inspection start position detecting means and the movement amount measurement value measured by the movement amount measuring means And an imaging unit that is attached to the moving mobile body and images the surface of the cable body in response to the start of the inspection of the cable body, and a storage unit that stores the image captured by the imaging unit in association with the inspection position , Image processing means for sequentially processing images sequentially stored by the storage means, quality determination means for determining the quality of the appearance of the cords based on the images processed by the image processing means, and the quality determination means When it is determined that the image is more defective, the inspection location corresponding to the image is searched from the information stored in the storage device, and the failure location specifying device for specifying the failure location in the cord-like body based on the search result And. Note that these various configurations have substantially the same functions as the configurations shown in FIG.

  Here, the cord-like body in the present embodiment is a support (wire) 25 stretched for guiding the traveling vehicle W to travel. A support arm 26 is attached to the upper end of the traveling vehicle W, and traveling wheels 27 and 27 as rotating bodies that roll the support 25 are provided at both ends of the support arm 26. Further, a scoop (pull-up wire) 28 is arranged in parallel with the support 25, and a support arm 26 of the traveling vehicle W is connected to the scoop 28 by forward or reverse rotation of an electric motor (not shown). The traveling vehicle W is moved along the support 25 by sending out or winding up the scissors 28.

  An imaging means 5 for imaging the surface of the support 25 is attached to the support arm 26 of the traveling vehicle W. A rotary encoder 4 for specifying the rotation amount and the rotation direction of the rotary shaft 27A is attached to the rotary shaft 27A of one of the running wheels 27, 27. For example, when the inspection start position is set to the outward start position of the traveling vehicle W, the travel amount of the traveling vehicle W is determined by the rotation direction and the count number of the rotary encoder 4 from the time when the outward start position is detected by the inspection start position detecting means. And the inspection position on the branch 25 is calculated by the inspection position calculation means from the amount of movement. In addition, although the case where there is one support line 25 is shown here, the present invention can also be applied to two or more support lines 25.

  As described above, according to the ropeway to which the cable body inspection device according to the present embodiment is applied, the imaging unit 5 is provided on the traveling vehicle W that moves along the fixed support line 25, and the imaging unit 5 Even in a system in which the support 25 relatively moves as seen, the same effects as the above-described elevator device are obtained.

  The present invention is not limited to any of the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in any of the above embodiments, a line sensor is shown as the imaging unit, but an area sensor may be used.

  In the first embodiment, two imaging units are used, and in the second embodiment, one imaging unit is used. However, the number is not limited. In addition, when only one image pickup means is provided, in addition to imaging only one surface of the wire rope, the front and rear surfaces may be imaged using a mirror or the like, or all four surfaces including both lateral surfaces may be imaged. You may comprise so that it may image.

  Furthermore, in said 1st embodiment, although it comprised with the halogen lamp which emits a near-infrared as an irradiation means, other lighting fixtures, such as another incandescent lamp, may be sufficient. In addition, the irradiation unit may be omitted when a cord-like body is imaged under a situation where there is a sufficient amount of light.

  Moreover, you may make it judge the defect location of a wire rope by converting the time-axis into a frequency axis by Fourier-transforming the waveform of the wire rope obtained by imaging with the said imaging means. Specifically, in FIG. 7, the horizontal axis represents frequency and the vertical axis represents intensity, and the waveform of the wire rope having no defective portion and the waveform of the wire rope having the defective portion were respectively created based on the Fourier transform values. The graph is shown. In the graph, the broken line shows the waveform of the wire rope with no defective portion, and the solid line shows the waveform of the wire rope with the defective portion. When the waveform (broken line) of the wire rope having no defective portion is seen, a peak generated by the periodicity of the wire rope twisting appears around 22 Hz. On the other hand, the waveform (solid line) of the wire rope with the defective portion has a peak near 7 Hz on the low frequency side, and the peak position is different from the waveform without the defective portion. Thus, it is determined that there is a defective portion when it is different from a waveform having no defective portion, that is, a Fourier transform waveform of a normal portion.

  In any of the above embodiments, the defective portion specifying means automatically specifies the defective portion in the cord, but the corresponding information is searched from the information stored in the storage means. And it may be made to perform in a human system specifying the defective part in a cable-like object based on the search result.

DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Fixed pulley (rotary body), 3 ... Winding machine, 4 ... Rotary encoder, 5 ... Imaging means (line sensor camera), 6 ... Support plate, 6A ... Insertion hole, 7 ... Light irradiation means, 7A, 7B ... lighting fixture, 8 ... alarm device, 10 ... inspection start position detecting means, 11 ... movement amount measuring means, 12 ... inspection position calculating means, 13 ... storage means, 14 ... image processing means, 15 ... good / bad judgment means , 16 ... Defect location identification means, 20, 22 ... Hall, 21 ... Wire, 25 ... Support (wire), 26 ... Support arm, 27 ... Traveling wheel (rotating body), 28 ... Scoring (pull-up wire), M ... machine room, R ... wire rope, U ... control unit, W ... traveling vehicle, α ... viewing angle

Claims (7)

In the cord inspection apparatus for inspecting the appearance of the cord moving by being sent out or wound up,
An inspection start position detecting means for detecting an inspection start position of the cord;
A moving amount measuring means for measuring a moving amount of the cord that changes with the movement of the cord; and
An inspection position calculation means for calculating an inspection position in the cord from the inspection start position detected by the inspection start position detection means and the movement amount measurement value measured by the movement amount measurement means;
Imaging means for imaging the surface of the cord every time a predetermined amount of movement of the cord is detected by the movement amount measuring means ;
Storage means for storing an image captured by the imaging means in association with the inspection position;
Image processing means for sequentially processing images sequentially stored by the storage means;
A cord inspection apparatus comprising: quality determination means for determining whether the appearance of the cord is good based on the image processed by the image processing means. In the cord inspection apparatus that inspects the appearance of the fixed-side cord that moves and supports the moving body,
An inspection start position detecting means for detecting an inspection start position of the cord-like body at the start of movement of the moving body;
A moving amount measuring means for measuring a moving amount of the moving body that changes with the movement of the moving body;
An inspection position calculation means for calculating an inspection position in the cord from the inspection start position detected by the inspection start position detection means and the movement amount measurement value measured by the movement amount measurement means;
An imaging unit that attaches to a moving moving body and images the surface of the cord-like body each time a predetermined moving amount of the moving body is detected by the moving amount measuring unit ;
Storage means for storing an image captured by the imaging means in association with the inspection position;
Image processing means for sequentially processing images sequentially stored by the storage means;
A cord inspection apparatus comprising: a quality determination unit that determines whether the appearance of the cord is good based on an image processed by the image processing unit.   When the pass / fail judgment unit determines that the image is defective, the inspection position corresponding to the image is searched from the information stored in the storage unit, and the defective portion in the cord is identified based on the search result. The cord inspection apparatus according to claim 1, further comprising a defect location specifying unit.   The moving amount measuring means includes a rotary encoder that is attached to a rotating shaft of a rotating body that rotates in contact with the cord-like body and outputs a pulse corresponding to the rotation of the rotating shaft, and the imaging means includes the rotary encoder The cord inspection apparatus according to any one of claims 1 to 3, wherein imaging is performed in synchronization with an output pulse from the cord.   A light irradiating unit configured to irradiate the cord with light; the light irradiated to the cord by the light irradiating unit reflects the surface of the cord; and the reflected light is received by the imaging unit. The cable-shaped body inspection apparatus according to any one of claims 1 to 4, wherein:   The cord inspection apparatus according to claim 5, wherein the light irradiation unit is a unit that irradiates the cord with near infrared rays. Wherein continue to count the pulses output from the rotary encoder, claim 4 when it becomes the number of the counted number is set in advance, characterized in that setting the imaging timing of the imaging unit to image wick member inspection apparatus according to.

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