JP2009012903A - Device and method for inspecting component strand disconnection of elevator wire rope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a component wire disconnection inspecting device of an elevator wire rope, preventing a strand breakage accident due to rope component strand disconnection, by inspecting a component strand disconnection state of the elevator wire rope previously. <P>SOLUTION: A detecting means 11 is provided which detects whether the predetermined number of wear legs of a predetermined size and a predetermined length exists in the component wire within a predetermined range or not from an image signal 9a and an elevator car position signal 10a imaged over a predetermined lifting stroke of the elevator wire rope, and judges that rope replacement is necessary when it is determined that the predetermined number of wear legs of the predetermined size and the predetermined length exists in the component wire within the predetermined range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator wire that prevents a strand (bundle of strands constituting a rope) from being broken by an inspection in advance of the strand breakage of the elevator wire rope. The present invention relates to a rope breakage inspection apparatus and method.

  Conventionally, an inspection camera is arranged while keeping a certain distance from the wire rope to be inspected, the wire rope is continuously photographed while moving the inspection camera along the wire rope, and the wire rope is inspected from the photographed result. A wire rope inspection method is known (see, for example, Patent Document 1).

  In addition, as another conventional technique, a system for continuously determining the progress of rope deterioration by remote monitoring, specifically, calculating the actual load of the rope from the operation control data of the elevator and obtaining from the element test. Use the damaged rope damage database to determine life. Furthermore, in resin-coated wire ropes, the outer layer coating resin is made into a multilayer structure with different colored resins, so that an elevator that monitors the damage of the outer layer coating resin by visually detecting the color change due to wear or by detecting with a light emitting diode. It is known (see, for example, Patent Document 2).

JP-A-10-226474 JP 2004-75221 A

  An elevator wire rope strand break (bundle of strands constituting the rope) breaks the strand if the rope strand break is left as it is. Therefore, it is only necessary to inspect the condition of the rope strands before that. However, at present, checking the wire breakage before the strand break of the elevator wire rope has been performed by visual inspection from only one direction of the rope, so it takes a lot of time and overlooks the wire breakage. In many cases, the rope to be replaced is overlooked, and accidents leading to strand breakage are seen. Also, rope breaks often occur in a specific area, and many rope breaks are caused by wear of a predetermined size or length on strands within a predetermined range. This is caused by having a predetermined number of legs.

  Inspecting the wire rope using a conventional inspection camera In the wire rope inspection method, the captured image is played back, and the damaged part is found from the playback content, so the oversight cannot be avoided. There is.

  In addition, in a conventional system that continuously determines the progress of rope deterioration by remote monitoring, the actual load of the rope is calculated from the elevator operation control data, and the rope life is calculated using the rope damage database obtained from element tests. In the case of a resin-coated wire rope, the outer layer coating resin is made of a multi-layered resin with a different color so that the color change due to wear is detected visually or with a light emitting diode, and the outer layer coating resin is monitored for damage. However, it is not intended to prevent the strand breakage accident from the strand breakage of the rope by inspecting the condition of the strand breakage of the rope before the strand breakage.

  The present invention has been made in order to solve the above-described problems. By inspecting in advance the condition of a broken wire of an elevator wire rope, a strand (element constituting the rope) is formed from the broken wire of the rope. A bundle of wires) An apparatus for inspecting wire breakage of an elevator wire rope and a method therefor are provided so as not to cause a breakage accident.

  In the wire breakage inspection device for elevator wire rope according to the present invention, the state of wire breakage of the wire rope for elevator is inspected in advance so that the strand wire breakage does not lead to strand breakage. A predetermined number of wear feet having a predetermined size or a predetermined length are applied to a strand within a predetermined range from an image signal obtained by capturing an image of an elevator wire rope over a predetermined lifting process and an elevator car position signal. Wire breakage detection that detects whether or not a rope needs to be replaced when it is detected that there are a predetermined number of wear feet of a predetermined size or length on a wire within a predetermined range. Means are provided.

  Further, it detects whether or not there are a predetermined number of broken wires within a predetermined range from a video signal obtained by taking an image of an elevator wire rope over a predetermined lifting process and an elevator car position signal. When detecting that a predetermined number of wire breaks, it is provided with a strand break detection means for determining that the rope needs to be replaced.

  In addition, it is detected whether the total number of wear feet of a predetermined size or length is greater than or equal to a predetermined number from a video signal obtained by imaging an elevator wire rope image over a predetermined lifting process and an elevator car position signal. The wire breakage detecting means determines that the rope needs to be replaced when it is detected that the total number of wear feet having a predetermined size or a predetermined length is greater than or equal to a predetermined number.

  In addition, it detects whether or not the total number of broken wires is greater than or equal to a predetermined number from the video signal obtained by imaging the image of the elevator wire rope over a predetermined lifting process and the elevator car position signal, and the total number of broken wires When it is detected that there is a predetermined number or more, wire breakage detecting means for determining that the rope needs to be replaced is provided.

  Further, the broken wire detection means inspects only the broken wire condition of the acceleration / deceleration portion where the load is most applied to the elevator wire rope.

  Moreover, in the strand wire breakage inspection method according to the present invention, the strand breakage inspection device for an elevator wire rope is used to inspect the strand breakage after washing the rope.

  Moreover, the strand breakage inspection device of the elevator wire rope is used to infiltrate the rope with the penetrating solution, and then the strand breakage is inspected.

  According to the present invention, an image of an elevator wire rope is imaged over a predetermined lifting process by the strand break detection device, and a predetermined number of wear feet having a predetermined size or a predetermined length are disposed on the strands within a predetermined range. When it is automatically detected that there is a predetermined number of wire breaks within a predetermined range, it can be determined that rope replacement is necessary. By automatically inspecting the state of strand breakage in advance, it is possible to reliably prevent a strand (bundle of strands constituting the rope) breakage accident from breaking the strand of the rope. Furthermore, when it is detected that the total number of wear feet of a predetermined size or length is greater than a predetermined number, or when it is detected that the total number of broken wires is greater than a predetermined number, rope replacement is necessary. It can also be judged that there is.

Embodiment 1 FIG.
1 is a sectional view and a side view showing the structure of an elevator wire rope according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of an elevator wire rope strand (bundle of strands) according to Embodiment 1 of the present invention. FIG. 3 is a partial enlarged view of a strand for explaining the situation from the wear leg generated in the strand of the elevator wire rope in Embodiment 1 of the present invention to the strand breakage, FIG. 4 is a system configuration diagram showing the overall configuration of the elevator wire rope strand breakage inspection apparatus according to Embodiment 1 of the present invention, and FIG. 5 is an elevator wire rope strand break inspection according to Embodiment 1 of the present invention. FIG. 6 is an explanatory diagram showing an initial setting example of a wire breakage inspection device for an elevator wire rope according to Embodiment 1 of the present invention. FIG. 8 is an explanatory diagram showing an example of a strand image captured by the elevator wire rope strand breakage inspection apparatus according to Embodiment 1 of the present invention, and FIG. 8 is a strand breakage of the elevator wire rope according to Embodiment 1 of the present invention. It is a flowchart for demonstrating operation | movement of a test | inspection apparatus.

  1 to 3, reference numeral 1 denotes an elevator wire rope that serves as an elevator main rope, and a fiber core 2 provided at the center and a number of spirals wound around the outer periphery of the fiber core 2 along the longitudinal direction. The strand 3 is composed of Each strand 3 is constituted by a bundle of a large number of strands 4. And it has been known that the breakage of the strand 3 of the elevator wire rope 1 occurs when the wire 4 is left as it is. Therefore, the situation until the strand 4 is disconnected will be described with reference to FIG. That is, the disconnection of the strand 4 often occurs in a specific area, and the cross-sectional area of the strand 4 gradually decreases due to wear of the hoisting machine and sheave wheel. Appears on the wire 4 as wear legs 4a of various shapes. And when there is a predetermined number of wear legs 4a having a predetermined size or length on the strand 4 within a predetermined range, the break 4b of the strand 4 is likely to occur, and the strand 3 of the elevator wire rope 1 The possibility of leading to breakage increases. Therefore, it is only necessary to inspect the condition of the rope strands before that. Note that the area of the wear foot 4a may be detected and checked instead of the length of the wear foot 4a.

  In FIG. 4, the elevator wire rope 1 configured as described above has an elevator car 5 and a counterweight 6 attached to both ends thereof, and is wound around a sheave 7 and a deflector 8 of the hoisting machine. . Reference numeral 9 denotes an ITV device comprising an industrial television camera that takes an image of the elevator wire rope 1 wound between the sheave 7 and the deflector wheel 8 and outputs the image signal 9a as a digital signal. In addition to the ITV apparatus, a method such as a laser may be used. An elevator control panel 10 outputs the car position signal 10a as a digital signal. 11 inputs a video signal 9a from the ITV device 9 and a car position signal 10a from the elevator control panel 10, and images the image of the elevator wire rope 1 over a predetermined lifting and lowering process. This is a strand break detection device that detects whether or not there is a predetermined number of wear feet 4a having a predetermined size or length, or whether there are a predetermined number of broken wires 4b within a predetermined range. The strand breakage detection device 11 captures an image of the elevator wire rope 1 over a predetermined lifting process, and the strand 4 within a predetermined range has a predetermined size or a predetermined length of the wear foot 4a. When it is detected that there is a predetermined number, or when it is detected that there is a predetermined number of wire breaks 4b within a predetermined range, it is determined that rope replacement is necessary. Furthermore, the strand breakage detection device 11 captures an image of the elevator wire rope 1 over a predetermined lifting process, and the total number of wear feet 4a having a predetermined size or length is equal to or greater than a predetermined number. When it is detected, or when it is detected that the total number of the broken wires 4b of the strand 4 is equal to or larger than a predetermined number, it can be determined that the rope needs to be replaced.

  FIG. 5 is a block diagram of the strand break detection device 11. In the figure, 12 is a video interface for inputting a video signal 9a from the ITV device 9, 13 is a transmission interface for inputting a car position signal 10a from the elevator control panel 10, 14 is a display, 15 is a keyboard, 16 is a CPU, Reference numeral 17 denotes a ROM, 18 denotes a RAM, and 19 denotes a printer.

FIG. 6 is an explanatory diagram showing an initial setting example of the strand break detection device 11.
As initial settings, the following information is input from the keyboard 15. That is, as input information, the ITV image frame picking pitch, the length of the wear foot, the number of wear feet in the predetermined frame (A), the number of breaks in the predetermined frame (B), the number of wear feet of the whole strand (A) Enter the number of broken wires (b) of the whole strand.

  FIG. 7 is an explanatory diagram showing an example of a strand image. From the first frame 1 to the frame N, the presence / absence of the bare wire wear foot 4a and disconnection 4b is imaged in accordance with the ITV image frame picking pitch. The image at this time can be judged by taking one place or a plurality of places or the entire circumference of the rope.

Next, operation | movement of the strand wire breakage inspection apparatus of the wire rope for elevators is demonstrated based on FIG.
First, in step S1, the car 5 is installed on the top floor, and from there, the elevator is driven at a low speed in the downward direction at a speed of several m / min. In step S2, it is determined whether or not the car position signal 10a has traveled for one frame. If the car 5 has traveled for one frame, the shutter of the ITV device 9 is turned off to capture one frame of video (step S3). ). Next, in step S4, the number of wear legs 4a having a predetermined length and the number of breaks 4b in the frame n are counted, and the wear legs = x and the break = y in the memory area corresponding to the frame n are stored (step S5). Next, in step S6, it is determined whether or not the car position signal 10a has reached the position of frame N. If the car position signal has reached the position of frame N, the shutter of the ITV device 9 is turned off for one frame. Are captured (step S7). In step S8, the same process is performed for frame N. Further, in step S9, it is determined whether or not the number of wear feet 4a in the predetermined frame (in a plurality of continuous frames) is A or more. If the number of wear feet 4a in the predetermined frame is A or more, rope replacement is performed. Necessary information is displayed on the display 14 and printed by the printer 19 (step S10). In step S9, if the number of wear legs 4a in the predetermined frame is not A or more, the process proceeds to step S11, and if the number of disconnections 4b in the predetermined frame (in a plurality of continuous frames) is B or more, the rope needs to be replaced. Is displayed on the display 14 and printed by the printer 19 (step S10). In step S11, if the number of disconnections 4b in the predetermined frame is not B or more, the process proceeds to step S12, and if the number of wear feet 4a of the whole strand is more than a, the indicator 14 indicates that the rope needs to be replaced. This is displayed and printed by the printer 19 (step S10). In step S12, if the number of wear feet 4a of the entire strand is not greater than a, the process proceeds to step S13, and if the number of broken wires 4b of the entire strand is equal to or greater than b, the indicator 14 indicates that the rope needs to be replaced. This is displayed and printed by the printer 19 (step S10). If the number of disconnection 4b of the whole strand is not more than b in step S13, it progresses to step S14, displays that the rope was normal on the indicator 14, and prints it with the printer 19. In step 2, if the car 5 has not traveled for one frame, the process returns to step S2, and if the car position signal has not reached the position of the frame N in step S6, the process returns to step S2. Note that the detection accuracy can be further improved by detecting the wire breakage by raising and lowering the elevator a plurality of times when going up and down as well as when going uphill.

  According to the first embodiment, an image of an elevator wire rope is imaged over a predetermined up / down stroke by the strand break detection device, and a predetermined size or a predetermined length of wear foot is applied to the strand within a predetermined range. When it is automatically detected that there is a predetermined number of wires, or when it is automatically detected that there are a predetermined number of broken wires within a predetermined range, it can be determined that rope replacement is necessary. By automatically inspecting the state of the wire rope strand breakage in advance, it is possible to reliably prevent the strand (bundle of strands constituting the rope) from being broken. Furthermore, when it is detected that the total number of wear feet of a predetermined size or length is greater than a predetermined number, or when it is detected that the total number of broken wires is greater than a predetermined number, rope replacement is necessary. It can also be judged that there is.

Embodiment 2. FIG.
FIG. 9 is a velocity curve diagram showing a portion where the rope is most likely to break in order to apply the wire breakage inspection device for an elevator wire rope according to Embodiment 2 of the present invention.

  Usually, the portion where the elevator wire rope is most likely to be broken is an acceleration / deceleration portion where the speed is maximized in the elevator characteristic and the load is most applied to the rope. In FIG. 9, the vertical axis indicates the speed, and the horizontal axis indicates the car position. Looking at the speed curve between the lowest floor and the top floor, starting from the bottom floor and continuing to accelerate to the maximum speed The accelerating / decelerating portion C and the accelerating / decelerating portion D that starts deceleration from the maximum speed in order to reach the top floor are the portions where the load is most applied to the rope, and the elevator wire rope is the most likely to break. Therefore, the part where the elevator wire rope is most likely to be cut, that is, the acceleration / deceleration part C which starts from the lowest floor and continues to accelerate to reach the highest speed, and starts deceleration from the highest speed to arrive at the highest floor. The image of the elevator wire rope portion corresponding to the acceleration / deceleration portion D is imaged by the strand breakage detection device 11, whereby the necessity of rope replacement can be determined. In particular, when the rope is new, it is not checked over the entire lifting stroke, but is the acceleration / deceleration part where the speed is maximum due to the elevator characteristics and the load is most applied to the rope. You may make it detect the strand break of the wire rope for elevators only by checking only the deceleration part.

Embodiment 3 FIG.
In this Embodiment 3, when detecting and checking the wear foot 4a or the disconnection 4b of the strand 4, in order to clarify the image, the strand break check may be performed after washing the rope, In order to clarify the disconnection portion, a strand breakage check may be performed after a predetermined penetrating solution is soaked into the rope. Further, after that, a developer may be applied to facilitate pattern recognition.

It is sectional drawing and the side view which show the structure of the wire rope for elevators in Embodiment 1 of this invention. It is a partial side view which expands and shows the strand (bundle of strands) of the wire rope for elevators in Embodiment 1 of this invention. It is the elements on larger scale of the strand for demonstrating the condition from the wear leg which generate | occur | produces in the strand of the wire rope for elevators in Embodiment 1 of this invention to a strand break. BRIEF DESCRIPTION OF THE DRAWINGS It is a system block diagram which shows the whole structure of the strand breakage inspection apparatus of the wire rope for elevators in Embodiment 1 of this invention. It is a block block diagram which shows the strand breakage inspection apparatus of the wire rope for elevators in Embodiment 1 of this invention. It is explanatory drawing which shows the example of an initial setting of the strand breakage inspection apparatus of the wire rope for elevators in Embodiment 1 of this invention. It is explanatory drawing which shows the example of a strand image imaged with the strand break inspection apparatus of the wire rope for elevators in Embodiment 1 of this invention. It is a flowchart for demonstrating operation | movement of the strand breakage inspection apparatus of the wire rope for elevators in Embodiment 1 of this invention. It is a speed curve figure which shows the location where a rope is easy to break | disconnect characteristically in order to apply the strand breakage inspection apparatus of the wire rope for elevators in Embodiment 2 of this invention.

Explanation of symbols

1 Elevator wire rope (main rope)
2 Fiber core 3 Strand 4 Strand 4a Wearing foot 4d Broken wire 5 Elevator car 6 Counterweight 7 Sheave 8 Shear wheel 9 ITV device 9a Video signal 10 Elevator control panel 10a Car position signal 11 Wire break detection device 12 Video interface 13 Transmission Interface 14 Display 15 Keyboard 16 CPU
17 ROM
18 RAM
19 Printer

Claims (7)

A wire wire breakage inspection device for an elevator wire rope that prevents the strand breakage from the wire breakage of the rope by inspecting the state of the wire breakage of the elevator wire rope in advance,
Whether or not there are a predetermined number of wear feet having a predetermined size or a predetermined length on a strand within a predetermined range from an image signal obtained by imaging an image of the elevator wire rope over a predetermined lifting process and an elevator car position signal Wire breakage detecting means for detecting whether or not the rope needs to be replaced when it is detected that there are a predetermined number of wear feet of a predetermined size or length on a wire within a predetermined range. Wire breakage inspection device for elevator wire ropes. A wire wire breakage inspection device for an elevator wire rope that prevents the strand breakage from the wire breakage of the rope by inspecting the state of the wire breakage of the elevator wire rope in advance,
It is detected from a video signal obtained by capturing an image of the elevator wire rope over a predetermined lifting process and an elevator car position signal whether or not there is a predetermined number of broken wires within a predetermined range, and the wires within the predetermined range are detected. A wire breakage inspection device for an elevator wire rope, comprising wire breakage detection means for determining that the rope needs to be replaced when it is detected that a predetermined number of breaks are present. A wire wire breakage inspection device for an elevator wire rope that prevents the strand breakage from the wire breakage of the rope by inspecting the state of the wire breakage of the elevator wire rope in advance,
Detecting whether or not the total number of wear feet having a predetermined size or a predetermined length is greater than or equal to a predetermined number from a video signal obtained by imaging an image of the elevator wire rope over a predetermined lifting process and an elevator car position signal For an elevator comprising wire breakage detection means for determining that the rope needs to be replaced when it is detected that the total number of wear feet of a predetermined size or length is greater than a predetermined number Wire rope strand break inspection device. A wire wire breakage inspection device for an elevator wire rope that prevents the strand breakage from the wire breakage of the rope by inspecting the state of the wire breakage of the elevator wire rope in advance,
From the video signal obtained by capturing the image of the elevator wire rope over a predetermined lifting process and the elevator car position signal, it is detected whether or not the total number of broken wires is greater than or equal to a predetermined number, and the total number of broken wires is A wire breakage inspection device for an elevator wire rope, comprising wire breakage detection means for determining that the rope needs to be replaced when it is detected that a predetermined number or more are present.   5. The elevator breaker according to claim 1, wherein the strand breakage detecting unit inspects only the strand breakage state of the acceleration / deceleration portion where the load is most applied to the elevator wire rope. Wire rope strand break inspection device.   An element of a wire rope for an elevator, wherein the wire breakage inspection device for a wire rope for an elevator according to any one of claims 1 to 4 is inspected for wire breakage after the rope is washed. Wire break inspection method.   The elevator wire rope breakage inspection device according to any one of claims 1 to 4, wherein the rope is infiltrated with an infiltrant and then the strand breakage is inspected. Wire rope strand break inspection method.

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