JP2006298510A - Deterioration diagnostic method for handrail of escalator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deterioration diagnosing method for a handrail of an escalator capable of efficiently diagnosing without removing the handrail by diagnosing deterioration of the handrail on the basis of height of a swelled part caused by a interlayer distance inside the handrail or length of a floating part. <P>SOLUTION: In this handrail diagnosing method for determining deterioration of the escalator handrail structured by laminating a plurality of materials, thickness fluctuation 10b between a travelling surface of the handrail to be brought in contact with a handrail guide 4 sliding for travel and a decorated rubber surface to be brought in contact with hands of passengers is measured, and compared with the preset threshold value to determine whether the handrail is deteriorated or not. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for diagnosing the progress of deterioration of an escalator handrail.

  In general, an escalator is provided with a handrail that moves in the same direction in synchronism with the step of placing the passenger, and the handrail prevents the passenger from falling. This handrail is made up of a stack of multiple materials. The length of the handrail rubber is increased by the temperature of the handrail and the load on the handrail by the passenger increases. In order to prevent the event, a tensile body such as a steel cord is provided inside the handrail.

  Here, when this handrail is used over a long period of time, the handrail is damaged and reaches the end of its life as a handrail. Damage to the handrail includes wear of the sliding surface due to sliding of the handrail with the guide rail that guides the handrail, disconnection due to metal fatigue of the steel cord provided inside the handrail, canvas within the handrail, etc. There are situations such as delamination at the interface between the steel cord and the steel cord, and the occurrence of blistering of the canvas surface as the interlayer separation progresses.

As a method for diagnosing such deterioration of the handrail, the wear of the canvas can be carried out by visual confirmation from the backside of the handrail. Regarding the disconnection of the steel cord, the disconnection of the steel cord is possible. There is a method of detecting leakage magnetic flux from the section (Patent Document 1) and a method of detecting the twist of the steel cord by the change in output voltage characteristics accompanying the change of magnetic flux (Patent Document 2).
Japanese Patent No. 3186326 (paragraphs 0016 to 0017, FIG. 6) JP 2002-80185 (paragraphs 0027 to 0118, FIG. 1)

  However, in the method for diagnosing handrail deterioration, there has been no method for diagnosing delamination inside the handrail.

  In addition, as for the swelling of the canvas accompanying the progress of delamination of the handrail, it was necessary to carefully investigate the entire back surface of the handrail, and it was necessary to disassemble the cover of the escalator mechanism and to stop it for a long time. . In addition, since it is a visual confirmation, an oversight or the like may occur. Therefore, reliability is lacking, and quantitative determination is impossible.

  The purpose of the present invention is to determine the deterioration of the handrail from the delamination length of the delamination that occurs inside the handrail, and the deterioration of the escalator handrail that efficiently performs the deterioration diagnosis without removing the HR. It is to provide a diagnostic method.

  According to the present invention, in a handrail diagnosis method for determining deterioration of an escalator handrail configured by laminating a plurality of materials, a makeup that touches a running surface that contacts a handrail guide on which the handrail slides and a human hand touches. The thickness variation with the rubber surface is measured, and the deterioration state is judged by comparing with a predetermined threshold value.

  In addition, the thickness variation measurement of the handrail is based on the variation length that exceeds the threshold due to the movement time by providing variation measurement means at a certain distance from the handrail guide on which the handrail slides and operating the handrail. It is characterized by determining the deterioration state.

  As an effect of claim 1, the height of the swelling due to the internal delamination of the handrail can be measured, and the deterioration state before reaching the use limit can be determined, so that the handrail can be repaired or replaced at an appropriate time. .

  As an effect of claim 2, since the length of the bulge is detected in addition to the height of the bulge due to the delamination, the growth of the delamination can be accurately grasped.

  Furthermore, since the measurement is performed by operating the handrail, it is not necessary to remove the handrail from the escalator, and the progress of the deterioration of the handrail can be determined efficiently without requiring time and effort.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a deterioration diagnosis method for an escalator handrail of the present invention will be described with reference to the drawings.

  1 and 2 show a general configuration of a handrail which is an object of the present invention. FIG. 1 is a perspective view, and FIG. 2 is a sectional view of a longitudinal side surface.

  As an example of the configuration of the handrail 1, the handrail 1 is composed of a laminated structure of a plurality of materials stacked on a decorative rubber 1a, a first canvas 1b, and a second canvas 1c that can be touched by a human hand from the outside. It is glued with a filler material. Further, between the first canvas 1b and the second canvas 1c, a tensile body made of a magnetic material such as a steel cord 1d is embedded in the longitudinal direction. In addition, like the canvas, the steel cord 1d is restrained by being bonded with a filling material such as rubber without a gap like the canvas.

  In such a configuration, a normal handrail 1 is bonded with a filling material such as rubber without a gap, but with the use of the handrail 1 over time, the filling material such as rubber constraining the steel cord 1d aggregates. As shown in FIG. 3, delamination 2 is generated between the steel cord 1d inside the handrail and the first canvas 1b and the second canvas 1c. appear. As the deterioration further progresses, the delamination 2 progresses in the longitudinal direction, and when the delamination length 3 becomes longer, the steel cord 1d starts to move, moves closer to the steel cord 1d, and further travels due to the gathering of the steel cord 1d. Swelling of the second canvas 1c occurs, leading to the use limit of the handrail 1 such as fretting wear due to contact between the steel cords 1d and wear of the canvas surface due to swelling of the canvas.

As described above, the main cause of the deterioration of the handrail 1 is the delamination 2 at the stacking boundary surface, and the delamination 2 generated between the steel cord 1d and the first canvas 1b and the second canvas 1c progresses with the deterioration. 2 The swelling of the canvas 1c causes the handrail 1 that slides on the handrail guide 4 to be lifted. As shown in FIG. 4, the distance 10a between the mutation sensor 5 provided at a predetermined position 10 from the handrail guide 4 and the normal cosmetic rubber 1a without deterioration is measured, and the second canvas 1c swells due to delamination 2 Thus, the cosmetic rubber 1a has a lifting distance 10b as compared with the normal time, and detects the degraded portion distance 10c with respect to the normal distance 10a. When the degraded portion distance 10c is a permissible limit degradation variation value, it can be determined that the diagnosis determination needs to be replaced.

  FIG. 5 shows detection of the lifting distance 10b when the handrail 1 is operated at a constant speed. The vertical axis represents the lifting distance 10b, and the horizontal axis represents the displacement sensor 5 passage time t. The length 3 of the delamination 2 can be detected by the passage time 10t having a value exceeding the predetermined threshold 10d at the lifting distance 10b in the normal rising fluctuation curve 6a without deterioration and the aged deterioration curve 6b with deterioration. . By distinguishing the length 3 of the interlayer distance 2, the deterioration progress status can be accurately determined, and the optimum replacement time can be predicted.

It is a front perspective view which shows the general structure of a handrail. It is side surface sectional drawing which shows the general structure of a handrail. It is a schematic diagram of the situation of delamination that occurs due to deterioration. It is sectional drawing of the handrail side surface which shows the floating fluctuation | variation by a swelling. It is a detection figure shown by the running time of delamination length.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handrail 1a Cosmetic rubber 1b 1st canvas 1c 2nd canvas 1d Steel cord 2 Delamination 3 Delamination length 4 Handrail guide 5 Displacement sensor 6a Lifting fluctuation curve of normal state without deterioration 6b Deterioration curve with deterioration 10 Predetermined position 10a Normal distance 10b Lifting distance 10c Degraded part distance 10d Predetermined threshold

Claims (2)

In the handrail diagnostic method for judging deterioration of the escalator handrail,
Measuring the variation in thickness between the running surface that contacts the handrail guide on which the handrail slides and the decorative rubber surface that is touched by a human hand, and comparing the threshold with a predetermined threshold value to determine the deterioration status Degradation diagnosis method of escalator handrail characterized by   The deterioration diagnosis method for an escalator handrail according to claim 1, wherein the thickness fluctuation measurement of the handrail is provided with a displacement measuring means at a certain distance from a guide on which the handrail slides, and the handrail is operated, A deterioration diagnosis method for an escalator handrail, wherein a displacement measurement means measures a variation with the decorative rubber surface, and determines a degradation state based on a variation length exceeding a threshold value due to a movement time.

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