JP2018154440A - Inspection device of elevator rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of inspecting an elevator rope in which a tensile strength member having a metallic strand is coated with a resin, the method allowing reliable inspection of degradation of the tensile strength member in a short operation time by evaluation using an X-ray projection image, and an inspection device.SOLUTION: An elevator rope 11 in which a periphery of a tensile strength member 12 having a metallic strand is coated with a resin 13 is irradiated with an X-ray, a shape of the tensile strength member 12 is captured from a projection image of the X-ray irradiated to the rope 11 and projected on a scintillator 22, and an outer diameter of the tensile strength member 12 is measured.SELECTED DRAWING: Figure 1D

Description

  Embodiments of the present invention relate to an elevator rope inspection method and an inspection apparatus for inspecting a deterioration state of a tensile strength member of a resin-coated rope used as a main rope of an elevator.

  The main rope (rope) used in the elevator without the machine room is routed in a narrow space that avoids the lifting space of the car and the counterweight. For this reason, there is a need for a main rope structure that can save space through downsizing the sheave and reducing the number of main ropes. In other words, a main rope structure using high-strength strands is required to reduce the sheave size and to be resistant to bending fatigue, and to reduce the number of main ropes.

  In recent years, a main rope structure (hereinafter referred to as a resin-coated rope) in which the surface of a tensile strength member such as a wire rope is coated with a resin material having wear resistance and a high friction coefficient such as polyurethane has been popularized. Resin-covered rope generally consists of a steel rope, a steel rope made of a relatively hard resin material, and a plurality of steel strands arranged around it. Is covered with a resin made of polyurethane.

  In the resin-coated rope having such a configuration, since the strands and cores that are the tensile members cannot be visually observed from the outside, even if deterioration of the strands or wear of the strands occurs in the tensile members like the conventional wire ropes, The state cannot be visually controlled.

  Conventionally, as one of wire rope strength management methods as an elevator main rope, there is a deterioration determination method by measuring the outer diameter of the rope. In general, the outer diameter of a rope is measured with a caliper. In this judgment method, the rope diameter of the portion that passes through the sheave and the portion that does not pass through the sheave due to the operation of the elevator is compared with the total length of the main rope, and the outer diameter of the sheave passage portion deteriorates due to wear (according to passage). Is replaced when the ratio is less than a predetermined ratio with respect to the diameter of the portion that does not pass through.

  In the case of a resin-coated rope, the deterioration of the tensile member due to the sheave passage is dominated by wear and breakage due to contact between the rope and the strand, or wear and breakage due to contact between the strands, and the outermost diameter of the tensile member. Decreases with deterioration. Therefore, the determination by measuring the outermost diameter of the strand portion is effective for determining the deterioration of the tensile member. However, since the resin coating is deformed as the diameter decreases, it is difficult to measure the outermost diameter of the strand portion with a caliper or the like on the surface of the main rope (resin coated rope) like the conventional ropes.

  As described above, since the tensile strength member cannot be visually controlled with the resin-coated rope, the resin-coated ropes (including the steel belt structure) that have been marketed so far, for example, energize the strands, Deterioration determination is performed by observing a change or by disposing a conductive member that deteriorates ahead of the tensile member inside the rope and monitoring the conduction state.

  However, the application destination of such a degradation detection method is limited to a structure in which the tensile member is a small number of strands, such as a steel cord having a small diameter. Moreover, although the application example to the aramid fiber and the wire rope with a resin coating is seen about the latter, since the structure becomes complicated, the manufacturing cost of the main rope is increased.

  By the way, it is common to apply X-ray inspection to non-destructive inspection, such as inspection of contamination of resin products. In this X-ray inspection, the internal structure to be inspected is visualized by the difference in X-ray transmittance. For example, there is an apparatus that detects and detects “raw wire” (fraying) of a long member including a steel cord as an image with an X-ray, such as a handrail of a passenger conveyor or the like.

Japanese Patent No. 5351925

  However, with an elevator rope that is wrapped around a relatively small-diameter sheave and supports a heavy object, it is not sufficient as a rope deterioration inspection just to detect the fraying of the steel cord portion described above. .

  The present invention makes it possible to perform a highly reliable inspection in a short working time by evaluating deterioration of a tensile member of a rope in which a tensile member having a metal strand is covered with a resin by using an X-ray projection image. An elevator rope inspection method and inspection device are provided.

  An elevator rope inspection method and inspection apparatus according to an embodiment of the present invention irradiates an rope for an elevator, which is coated with a resin around a tensile strength member having a metal strand, and is irradiated to the rope. The shape of the tensile member is captured from the projected image of the X-ray projected on the scintillator, and the outer diameter thereof is measured.

  According to the above configuration, by measuring the outer diameter of the tensile member of the rope coated with resin using an X-ray projection image, the deterioration of the tensile member can be evaluated from the outer diameter, and the reliability can be achieved in a short working time. High inspection is possible.

It is a side view which shows the inspection apparatus of the elevator rope which concerns on embodiment of this invention. It is XX arrow line view of FIG. 1A. It is a YY arrow line view of FIG. 1A. It is a ZZ arrow line view of FIG. 1A. It is a side view which shows the state of the non-inspection position of the inspection apparatus shown in FIG. 1A. It is a figure corresponding to Drawing 1D and explaining the irradiation state of X-rays. It is a figure corresponding to Drawing 1D and explaining the irradiation state of X-rays by changing the position of a pair of gauge parts. It is a figure explaining the irradiation state of a X-ray corresponding to FIG. 1D, further changing the position of a pair of gauge part. It is a figure which shows the projection image by the X-ray irradiation of FIG. 3A. It is a figure which shows the projection image by the X-ray irradiation of FIG. 3B. 3C is a diagram showing a projected image by X-ray irradiation of AC. It is a figure explaining the X-ray irradiation state at the time of providing a pair of gauge part near a scintillator. It is a figure explaining the X-ray irradiation state at the time of providing a pair of gauge part near X-ray irradiation opening. It is a figure which shows the projection image by the X-ray irradiation of FIG. 5A. It is a figure which shows the projection image by X-ray irradiation of FIG. 5B. It is a figure which shows the case where an encoder and an arithmetic unit are attached to the movement operation part of a pair of gauge part. It is a figure which shows the example which covered the X-ray irradiation part with the X-ray shielding member. It is a figure which shows the example which attached the elastic body to the holding member. It is a figure explaining the section composition of the rope for elevators covered with resin.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, an example of a resin-coated rope used as an elevator rope will be described with reference to FIG. In FIG. 10, a resin-coated rope 11 is formed by integrally filling and covering a tensile member 12 bearing a load as a main rope with a resin 13 made of polyurethane. The tensile member 12 includes a core rope 15 composed of a plurality of core wires made of steel or a resin material having relatively high hardness, and a plurality of metal (usually steel) strands 16 arranged around the core rope 15.

  In the resin-coated rope 11 having such a configuration, the core rope 15 and the strand 16 constituting the tensile strength member 12 cannot be directly visually observed from the outside.

  Therefore, in the elevator rope inspection method and inspection apparatus according to this embodiment, X-rays are irradiated to the rope 11 for elevator, in which the periphery of the tensile strength member 12 is covered with the resin 13, and the rope 11 is irradiated with the X-rays. By capturing the shape of the tensile member 12 from the projected image and measuring the outer diameter, it is possible to determine the deterioration of the tensile member 12 due to the breakage or wear of the strands from the measured outer shape value.

  The configuration of the rope inspection apparatus using the X-ray will be described with reference to FIGS. The inspection device shown in FIG. 1A includes an X-ray irradiation port 21, a scintillator 22, and a measuring unit 23.

  The X-ray irradiation port 21 irradiates the resin-coated rope 11 with X-rays, and is attached to one (upper side in the drawing) of the movable support base 24A. The scintillator 22 displays a projected image of X-rays irradiated to the rope 11 from the X-ray irradiation port 21 and is attached to the other (downward in the drawing) movable support base 24B. The scintillator 22 has a member (not shown) that emits light according to the intensity of the received X-rays on the surface (projection surface) 22a, and displays an image according to the intensity of the X-rays transmitted through the inspection target. The internal structure to be inspected is visualized by connecting to 22a. The measuring means 23 captures the shape of the tensile member 12 from the X-ray projection image projected on the projection surface 22 a of the scintillator 22. The outer diameter is measured. The detailed configuration of the measuring means 23 will be described later.

  The movable support bases 24A and 24B described above are configured to be moved up and down in opposite directions by a drive mechanism (not shown), and move between the inspection state shown in FIG. 1 and the non-inspection state (retracted position) shown in FIG. Is possible.

  In addition, the inspection device includes a support member 25 that keeps the distance between the X-ray irradiation port 21 and the projection surface (surface) 22a of the scintillator 22 constant, and the X-ray irradiation port 21 and the projection surface 22a. In between, it has the rope holding member 26 which keeps the distance of these both 21 and 22a and the rope 11 constant.

  The support member 25 includes a pair of upper and lower members 25a and 25b, which are attached to the corresponding movable support bases 24A and 24B, respectively, and sandwich the resin-covered rope 11 to be inspected as shown in FIG. 1B in the inspection state. Are arranged as follows. At the time of inspection, the a portion and the b portion which are opposite to each other shown in FIG. 2 are in contact with each other, so that the distance between the X-ray irradiation port 21 and the projection surface 22a of the scintillator 22 is kept constant. Since a general elevator uses a plurality of main ropes, the support member 25 has a dimension that allows passage between the inspection target rope and the adjacent rope.

  The rope holding member 26 also includes a pair of upper and lower members 26a and 26b, which are respectively attached to the corresponding movable support bases 24A and 24B, and arranged so as to sandwich the rope 11 to be inspected as shown in FIG. 1C in the inspection state. Is done. In the inspection state, the distances between the rope 11 to be inspected, the X-ray irradiation port 21, and the projection surface 22a of the scintillator 22 are kept substantially constant. Moreover, it fixes so that the rope 11 may be arrange | positioned in the center between the X-ray irradiation opening | mouth 21 and the projection surface 22a of the scintillator 22. FIG.

  As shown in FIG. 1C, the rope holding member 26 forms a holding portion in contact with the outer periphery of the rope 11 in a V shape sandwiching the rope 11. In this way, the rope 11 is positioned at the center of the V shape.

  The support member 25 and the rope holding member 26 have a pair of upper and lower members 25a, 25b and 26a, 26b, together with the X-ray irradiation port 21 and the scintillator 22, as described above, the corresponding movable support base 24A, Since it is attached to 24B, it can be displaced to the inspection state shown in FIG. 1A and the non-inspection state shown in FIG. In the non-inspection state shown in FIG. 2, the rope 11 can be moved.

  As shown in FIGS. 1A and 1D, the measuring unit 23 includes a pair of gauge parts 231, a movement operation part 232 of the pair of gauge parts 231, and a support part 233.

  The pair of gauge portions 231 is disposed on the lower side of the rope 11 in the drawing (position on the scintillator 22 side) substantially in parallel with the length direction of the rope 11. Further, the pair of gauge portions 231 are configured to be movable in parallel with each other along the surface 22a of the scintillator 22 (the left-right direction in FIG. 1D). In other words, the pair of gauge portions 231 is screwed into the screw portion 232 a of the shaft-like movement operation portion 232 that is rotatably supported by the support portion 233. The screw portion 232a of the moving operation portion 232 is reverse-threaded, and the pair of gauge portions 231 are moved in the opposite directions by the same distance by being rotated by the operation knob 232b.

  The moving direction center point of the pair of gauge portions 231 (the starting point of outward movement in the drawing) and the radial center point of the rope 11 are positioned so as to coincide with each other.

  The pair of gauge portions 231 is projected on the scintillator 22 together with the rope 11 by X-rays, and is projected together with the projection image of the rope 11 on the projection surface 22a. For the pair of gauge portions 231, a material having a lower X-ray transmittance than that of the coating resin 13 (for example, equal to or lower than the X-ray transmittance of the strand 16 constituting the tensile strength member 12) is used.

  Further, as shown in FIG. 4C, the pair of gauge portions 231 is such that the gauge end portion 231a of the projection image 231A projected onto the scintillator 22 is an intermediate portion in the length direction (vertical direction in the drawing) of the projection surface 22a of the scintillator 22. The shape projected on With such a shape, the projection image of the rope 11 projected on the projection surface 22a (projection image 12A of the tensile member 12 as will be described later) covers both ends (upper and lower ends in the drawing) of the projection surface 22a. The projected image 231A of the pair of gauge portions 231 can be easily distinguished from the projected image 12A of the rope 11 by projecting the gauge end portion 231a to the intermediate portion in the illustrated vertical direction of the projection surface 22a.

  In addition, as shown in FIG. 2, the scintillator 22 includes a pair of gauge portions 231 constituting the measuring means 23, a movement operation portion 232 of the pair of gauge portions 231 and the support portions 233 as shown in FIG. It has moved to the retreat position away from the X-ray irradiation port 21 side together with the side.

  Next, a method for determining deterioration of the tensile member 12 of the resin-coated rope 11 will be described with reference to FIGS. 3 is a diagram for explaining the case of irradiating X-rays by changing the position of the pair of gauge portions 231 constituting the measuring means 23 with respect to the rope 11, and FIG. 4 is irradiated with the positional relationship of FIG. X-ray projection images are shown respectively.

  During the inspection of the rope 11, the arrangement of the X-ray irradiation port 21, the scintillator 22, and the resin-coated rope 11 (the tensile member 12) to be inspected is substantially constant by the support member 25 and the rope holding member 26 shown in FIG. In addition, the projected image 12A of the tensile member 12 having the same width is projected on the scintillator 22 as shown in FIG. Although the projection image at this time includes a projection image of the coating resin 13, since the difference in the X-ray transmittance between the tensile member 12 and the resin 13 is large, the identification is easy. The image is omitted.

  Along with the projected image 12A of the tensile member 12, a projected image 231A of a pair of gauge portions 231 having an X-ray transmittance equal to or lower than that of the tensile member 12 is also projected on the scintillator 22 and indicates the positions of the pair of gauge portions 231. .

  For example, as shown in FIGS. 3A and 3B, when the pair of gauge portions 231 is inside the straight line 36 that contacts the surface of the tensile member 12 from the end of the X-ray irradiation port 21 and reaches the surface of the scintillator 22. The pair of gauge portions 231 are in the shadow of the tensile member 12 having an extremely low X-ray transmittance, and the projection image 231A of the pair of gauge portions 231 cannot be identified.

  On the other hand, when the pair of gauge parts 231 goes out of the straight line 36 as shown in FIG. 3C, the projected image 231A of the pair of gauge parts 231 is placed on the scintillator 22 as shown in FIG. 4C. It occurs with the same level of contrast as the 12 projected images 12A.

  The pair of gauge portions 231 is shaped so that the gauge end portion 231a of the projection image 231A is generated in the middle of the projection surface 22a of the scintillator 22, as shown in FIG. 4C. Identification with is easy. Accordingly, the positions of the pair of gauge parts 231 are adjusted while viewing the projection images 12A and 231A of the tensile member 12 and the gauge part 231, and one side of the projected image 231A of the gauge part 231 is projected by the tensile member 12 as shown in FIG. 4B. It is easy to match with one side of the image 12A.

When the side of the projection image 12A coincides with the side of the projection image 231A and the positional relationship dimensions of each part are as shown in FIG. 3B, the diameter (outer diameter) d of the tensile member 12 is expressed by the following equation using the dimensions of FIG. It is represented by

The distance w between the sides of the pair of gauge portions 231 can be easily measured. Further, the opening dimension l of the X-ray irradiation port 21, the distance L ₁ from the X-ray irradiation port 21 to the center of the inspection target rope 11, and the distance L from the center of the inspection target rope 11 to the upper side of the pair of gauge portions 231 in the figure. ₂ is a known dimension. For this reason, by adjusting the positions of the pair of gauge portions 231 so that the sides of the projection image 12A and the projection image 231A coincide with each other, and measuring the interval w when they coincide with each other, the tensile strength member is obtained from the above equation (1). A diameter d of 12 is obtained.

  That is, the outer diameter (diameter) d can be measured by capturing the shape of the tensile member 12 by changing the position of the pair of gauge portions 231 from the projected image of the X-rays projected on the scintillator 22. it can.

  By performing the diameter measurement operation of the tensile member 12 on the rope that passes through the sheave and the portion that does not pass through the sheave during the operation of the elevator, it is possible to determine the deterioration based on the change in the outer diameter similar to the conventional general rope. It becomes.

  In the above-described operation of matching the sides of the projection image, the projection image 12A and the projection image 231A can be clearly distinguished from the projection image (not shown) of the resin 13 (high contrast is obtained). )There is a need. Therefore, the arrangement of the pair of gauge portions 231 is preferably a position where the X-ray irradiation port 21 is completely blocked when viewed from the area where the projected image 231A is projected on the scintillator 22.

  5A shows a case where the pair of gauge portions 231 is installed on the scintillator 22 side, and FIG. 5B shows a case where the pair of gauge portions 231 is installed on the X-ray irradiation port 21 side. 6A shows a projection image 231A of the gauge unit 231 in the X-ray irradiation state of FIG. 5A, and FIG. 6B shows a projection image 231A of the gauge unit 231 in the X-ray irradiation state of FIG. 5B. In FIG. 6, only the projection image of one gauge of the pair of gauge portions 231 is shown.

  5A, since the pair of gauge portions 231 is installed on the scintillator 22 side, when the X-ray irradiation port 21 is viewed from the region of the projection image 231A shown in FIG. 6A, the entire irradiation port 21 is shown as shown in FIG. 5A. Is blocked by the gauge portion 231. Thereby, as shown in FIG. 6A, the contrast between the projected image 231A and the other areas of the scintillator 22 is increased, and a clear projected image 231A is obtained.

  On the other hand, FIG. 5B is a case where a pair of gauge part 231 is installed in the X-ray irradiation port 21 side. In this case, when the X-ray irradiation port 21 is viewed from the region of the projection image 231A illustrated in FIG. 6B, the entire irradiation port 21 is not blocked by the gauge portion 231 as illustrated in FIG. 5B. Since X-rays in a state where only a part of the irradiation port 21 is blocked by the gauge portion 231 reach, the difference in contrast with other regions decreases, resulting in an unclear projection image 231A.

  Thus, in order to block the X-rays directly reaching from the X-ray irradiation port 21 by the pair of gauge portions 231, the gauge portion 231 needs to be arranged closer to the scintillator 22 as the size of the gauge portion 231 is smaller. From the viewpoint of reducing the size of the inspection device, it is desirable that the pair of gauge portions 231 be disposed between the rope 11 to be inspected and the scintillator 22.

  In addition, in order to obtain high contrast in the projection image obtained on the scintillator 22, together with the above-described positional relationship between the rope 11 to be inspected and the pair of gauge portions 231, the opening dimension l of the X-ray irradiation port 21 is obtained. Also related. If the opening dimension l of the X-ray irradiation port 21 is larger than a predetermined dimension with respect to the distance (constant) between the X-ray irradiation port 21 and the scintillator 22, the rope 11 to be inspected or a pair of objects as viewed from the projection surface of the scintillator 22. Since the gauge portion 231 does not completely block the X-ray irradiation port 21, the contrast is lowered. Therefore, in order to obtain a high contrast in the projected image, it is desirable that the opening dimension l of the X-ray irradiation port 21 be equal to or smaller than the diameter of the rope 11 to be inspected from the viewpoint of downsizing the inspection apparatus.

  In the above embodiment, the measuring means 23 adjusts the distance between the pair of gauge portions 231 while viewing the projected image, and measures the distance w when the sides of the projected image coincide with each other, thereby measuring the resin-coated rope. 11, the diameter of the tensile member 12 inside was measured. However, in order to measure the distance between the pair of gauge portions 231 with a measuring tool such as a caliper, for example, it is necessary to remove the rope from the inspection device.

  Therefore, as shown in FIG. 7, the measuring unit 23 is provided with an encoder 235 that generates a signal according to the movement amount of the pair of gauge portions 231, and the movement amount of the pair of gauge portions 231 obtained from the output of the encoder 235. An arithmetic device 236 for calculating the outer diameter of the tensile strength member 12 may be provided based on (interval).

  That is, a rotary encoder 235 that emits a signal in synchronization with the rotation of the movement operation unit 232 is provided in the shaft-like movement operation unit 232 constituting the measuring means 23. Since the signal from the encoder 235 indicates the movement amount (interval w) of the pair of gauge portions 231, the diameter (outer diameter) d of the tensile member 12 can be calculated based on the equation (1). This eliminates the need for manual dimension measurement of the pair of gauge portions 231 and greatly reduces the labor of the rope inspection work.

  Further, the calculation device 236 may be a calculation / display device that displays the value of the diameter of the tensile member 12 calculated based on the equation (1).

  Since the inspection device described so far measures the diameter of the tensile member 12 inside the resin-coated rope 11 by X-ray transmission, it is necessary to avoid the effects of X-ray exposure on the operator. For this purpose, as shown in FIG. 8, a shielding member 38 that covers the X-ray irradiation unit including the X-ray irradiation port 21 and the scintillator 22 and shields X-rays from the outside may be provided. That is, the X-ray shielding member 38 covers the X-ray irradiation unit from the X-ray irradiation port 21 to the scintillator 22 that obtains a projection image, except for the part operated at the time of measurement, such as the movement operation unit 232 of the measuring unit 23. desirable.

  In the above-described embodiment, a rotary encoder is exemplified as the encoder 235. However, a linear encoder (not shown) that outputs a pulse by providing a magnetic pattern or an optical pattern on the pair of gauge portions 231 or the support portion 233 thereof. May be used.

  Further, in the inspection state shown in FIG. 1A, as a modification of the rope holding member 26 that holds the rope 11 in a predetermined positional relationship, a V-shaped portion of the rope holding member 26 that is in contact with the rope 11 is arranged in FIG. As shown by, an elastic body 27 may be provided. With this configuration, when the diameter of the rope 11 covered with resin is reduced due to deterioration, the rope 11 can be prevented from being displaced from a predetermined inspection position (the center between the X-ray irradiation port 21 and the scintillator 22). it can. That is, since the distance between the X-ray irradiation port 21 and the scintillator 22 is constant by the support member 25, the rope 11 to be inspected by the rope holding member 26 having a V shape and the elastic body 27 provided on the V-shaped slope. The center of the rope 11 even when the diameter of the rope is reduced. It can be supported at the center of the X-ray irradiation port 21 and the scintillator 22, thereby enabling highly accurate dimension measurement.

  In the above-described embodiment, the X-ray irradiation port 21, the scintillator 22, and the measuring means 23 are attached to corresponding ones of the movable support bases 24A and 24B configured to be movable up and down in opposite directions. It was configured to be movable to the inspection position shown in FIG. 1 and the non-inspection position (retracted position) shown in FIG.

  For this reason, the rope 11 to be inspected is moved in the length direction in the non-inspection state shown in FIG. 2, and during the inspection, the movement of the rope 11 is stopped, and the X-ray irradiation port 21 and the scintillator are supported by the support member 25. 22 is positioned at a predetermined distance as shown in FIG. Further, the rope 11 is fixed by the rope holding member 26, and X-rays are irradiated from the X-ray irradiation port 21, and a projected image is projected on the scintillator 22.

  In this way, irradiating X-rays with the rope 11 fixed by the rope holding member 26 to obtain a projected image does not cause the rope 11 to be blurred, and the projected width of the tensile strength member 12 is not blurred. It is possible to reliably prevent changes due to and accurate measurement.

  However, since the rope 11 is intermittently moved for each inspection and X-ray irradiation is performed in the stopped state, it takes a lot of inspection time to perform the inspection over the entire length of the rope 11.

  Therefore, the X-ray irradiation port 21, the scintillator 22, and the measuring means 23 are fixedly installed in the positional relationship equivalent to the inspection state shown in FIG. 1 without being attached to the movable support bases 24A and 24B. The X-ray irradiation port 21 and the scintillator 22 are inserted into a position that forms a predetermined interval. And while moving this rope 11 to a length direction, X-rays are irradiated from the X-ray irradiation port 21, a projection image is projected on the scintillator 22, and the measurement means 23 is used based on the projection image of this rope 11. Thus, the outer diameter of the tensile member 12 may be obtained by the same method as in the above-described embodiment.

  In this case, the moving speed of the rope 11 is set to an inspection speed lower than the so-called operation speed during elevator operation. The inspection speed is significantly lower than the operation speed as described above, and is also a constant speed. Therefore, even if the rope 11 is shaken as the rope 11 moves, the check speed is slight. Moreover, the value of this blur can be sufficiently predicted from the past operation results. Therefore, by correcting the interval w between the pair of gauge portions 231 obtained based on the projection image using the predicted value of blur, a value equivalent to the case without blur (outer diameter of the tensile member 12) is obtained. be able to.

  As described above, by continuously performing the inspection work by X-ray irradiation while moving the rope 11 to be inspected, the work efficiency is improved, and the inspection time over the entire length of the rope 11 can be greatly shortened. .

  As described above, with respect to the resin-coated rope 11 in which the tensile member 12 cannot be visually observed, the outer diameter of the tensile member 12 is obtained based on the projection image by X-ray, thereby checking the deterioration over time inside the rope 11. This makes it possible to suppress an increase in the cost of the resin-coated rope 11 body and the elevator system, and to improve safety.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 ... Rope for inspection (resin-coated rope)
DESCRIPTION OF SYMBOLS 12 ... Tensile member 12A ... Projection image of tensile member 13 ... Coating resin 15 ... Heart rope 16 ... Strand 21 ... X-ray irradiation port 22 ... Scintillator 22a ... Projection surface 23 ... Measuring means 231 ... A pair of gauge part 231A ... A pair of gauge Projected image 231a ... Gauge end of projected image 232 ... Moving operation unit 233 ... Supporting unit 235 ... Encoder 236 ... Computing device 25 ... Supporting member 26 ... Rope holding member 27 ... Elastic body 38 ... X-ray shielding member

Embodiments of the present invention relates to a biopsy apparatus point elevator rope to check the status of deterioration of strength members including heart ropes and strands of resin-coated ropes used as the main ropes of an elevator.

The present invention is a short work by evaluating the deterioration of a tensile member of a rope in which a tensile member made of a plurality of metal strands arranged around the heart rope and its periphery is coated with a resin, using an X-ray projection image. there is provided a time enables reliable checking between the biopsy device point of the elevator rope.

An elevator rope inspection apparatus according to an embodiment of the present invention is for an elevator in which the periphery of a tensile member formed by arranging a plurality of metal strands around a core rope composed of a plurality of strands is covered with a resin. X-ray irradiation port for irradiating X-rays on the rope, a scintillator in which a projection image of X-rays irradiated from the X-ray irradiation port to the rope is copied, and projection of the X-rays projected on the scintillator A measuring unit that captures the shape of the tensile member from an image and measures an outer diameter thereof , and the measuring unit includes a pair of gauge parts made of a material having a lower X-ray transmittance than the resin. The gauge portion is arranged substantially parallel to the rope, and is movable in parallel to the opposite direction along the surface of the scintillator, and is projected onto the scintillator together with the rope.

Claims (10)

X-rays are applied to an elevator rope in which the periphery of a tensile member having a metal strand is coated with a resin,
Capture the shape of the tensile member from the projected image of the X-ray irradiated to this rope and projected onto the scintillator, and measure the outer diameter thereof,
An elevator rope inspection method characterized by the above. An X-ray irradiation port for irradiating X-rays on an elevator rope in which the periphery of a tensile member having a metal strand is coated with resin;
A scintillator in which a projection image of the X-ray irradiated to the rope from the X-ray irradiation port is displayed;
Measuring means for capturing the shape of the tensile member from the projected image of the X-rays projected on the scintillator and measuring the outer diameter;
An elevator rope inspection device characterized by comprising: Between the X-ray irradiation port and the projection surface of the scintillator, a rope holding member that keeps the distance between the two and the rope constant,
The elevator rope inspection device according to claim 2, further comprising:   The measuring means has a pair of gauge parts made of a material having a lower X-ray transmittance than the resin, and the pair of gauge parts are arranged substantially parallel to the rope and are reciprocal along the surface of the scintillator. The elevator rope inspection apparatus according to claim 2, wherein the elevator rope inspection apparatus is capable of translating in a moving direction and projected onto the scintillator together with the rope. The measuring means includes an encoder that generates a signal in accordance with a movement amount of the pair of gauge portions;
An arithmetic device that calculates the outer diameter of the tensile member based on the distance between the pair of gauge portions obtained from the output of the encoder;
The elevator rope inspection device according to claim 4, further comprising:   6. The pair of gauge portions has a shape in which a gauge end portion of a projection image projected onto the scintillator is projected onto an intermediate portion of a projection surface of the scintillator. 6. Elevator rope inspection equipment.   The elevator rope inspection device according to claim 3, wherein the rope holding member has a V shape sandwiching the rope as a rope holding portion.   The elevator rope inspection apparatus according to claim 7, further comprising an elastic body at a portion in contact with the rope of the rope holding member having the V shape.   The X-ray irradiation port irradiates the X-ray to the moving rope along the length direction, and the scintillator displays the projection image of the X-ray irradiated to the moving rope. The elevator rope inspection apparatus according to claim 2.   9. The apparatus according to claim 2, further comprising a shielding member that covers an X-ray irradiation unit including the X-ray irradiation port and the scintillator and shields the X-ray from the outside. The elevator rope inspection device described.

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