JP2004331260A - Chain elongation detection method for escalator - Google Patents

Chain elongation detection method for escalator Download PDF

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Publication number
JP2004331260A
JP2004331260A JP2003126388A JP2003126388A JP2004331260A JP 2004331260 A JP2004331260 A JP 2004331260A JP 2003126388 A JP2003126388 A JP 2003126388A JP 2003126388 A JP2003126388 A JP 2003126388A JP 2004331260 A JP2004331260 A JP 2004331260A
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JP
Japan
Prior art keywords
sound
chain
escalator
chain elongation
frequency
Prior art date
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JP2003126388A
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Japanese (ja)
Inventor
Tadashi Goshima
匡 五嶋
Masashi Masuda
正志 増田
Kiyoshi Naganuma
清 長沼
Hiroshi Yamazaki
浩 山崎
Satoshi Tanakadate
聡 田中舘
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Hitachi Building Systems Co Ltd
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Hitachi Building Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2003126388A priority Critical patent/JP2004331260A/en
Publication of JP2004331260A publication Critical patent/JP2004331260A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent an ordinary passenger from hearing informing sound and enable diagnosis without being affected by operation sound and environmental sound in the surroundings. <P>SOLUTION: In this chain elongation detection method, informing sound having frequency outside an audible zone or specific high frequency in which sound pressure included in background noise at the time of normal operation is low is generated from an acoustic device 12 when chain elongation occurs and it is determined that chain elongation occurs when sound pressure having specific frequency exceeds a predetermined value. Chain elongation is determined using a sound collection means 28 for collecting operation sound of an escalator in a place apart from the acoustic device 12 during operation of the escalator, a storage means 29 for storing operation sound collected by the sound collection means 28, a computing means 30 for analyzing frequency of a stored and measured value, a passing determining means 31 for comparing a value computed by the computing means 30 with a predetermined value determined in advance to diagnose an abnormality, and a display means 32 for displaying the result of the computing means 30 or the passing determining means 31. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、エスカレーターのチェーン伸び検知方法に関するものである。
【0002】
【従来の技術】
従来、エスカレーターのチェーン伸びの検知を報知音等で知らせる装置にあっては、機構によりチェーン伸び等が発生すると変動が生じる部分に音響物体を接触させる構造とし、接触により発生する報知音で異常を知らせる装置を設けているものがある(例えば、特許文献1参照。)。
【0003】
また、チェーンローラーの通過を検出して出力信号を出力するチェーンローラー通過検出部と、前記出力信号のパルス周期およびパルス幅の少なくとも一方に基づき前記チェーンの伸びを定量的に判定する判定部とを備えたことを特徴とするチェーン伸び度診断装置がある(例えば、特許文献2参照。)。
【0004】
【特許文献1】
特開平7−206354号公報 (段落番号0007、第2図)
【0005】
【特許文献2】
特開平11−194024号公報
(段落番号0015−0018、第1図)
【0006】
【発明が解決しようとする課題】
従来技術のエスカレーターを停止させずにチェーン伸びを検知する方法における音響物体との接触により発生する報知音は、一般の乗客にも聞こえ、異常音として乗客に不安を与える恐れがある。一方、稼動音または周囲の環境音が大きい条件の場合、チェーン伸び発生時にもかかわらず、報知音が稼動音または周囲の環境音に埋もれることで聞こえず、チェーン伸びを検知できない恐れがある。その他、チェーンの通過周期を検出する等のセンサーによる伸び判定は、装置が複雑化すること、装置設置に手間を要すること、また高価である問題がある。
【0007】
本発明の目的は、チェーン伸び発生時の報知音を特定高周波数に設定することで、エスカレーター稼動時に報知音が一般乗客に聞こえないこと、また稼動音、周囲の環境音の影響を受けず診断可能なエスカレーターのチェーン伸び検知方法を提供するにある。
【0008】
【課題を解決するための手段】
本発明は、上記目的を達成するため、エスカレーターのチェーン伸び発生時に、チェーン弛み部でチェーンと接触して報知音を発生する音響装置をチェーン近傍に設置し、チェーン伸び発生を報知音で知らせることによりエスカレーターを停止させずにチェーン伸びを検知するエスカレーターのチェーン伸び検知方法において、チェーン伸び発生時には、可聴域外の周波数または、正常稼動時の暗騒音に含まれる音圧が低い特定高周波数の報知音が音響装置より発生し、特定周波数の音圧が所定値を越えるとチェーン伸び発生と判定することを特徴とする。
【0009】
また、エスカレーター稼動中に音響装置から離れた場所でエスカレーターの稼動音を集音する集音手段と、前記集音手段で集音した稼動音を記憶する記憶手段と、記憶した測定値を周波数解析する演算手段と前記演算手段で演算した演算値と予め定められた所定値を比較し異常を診断する合否判定手段と、演算手段または、合否判定手段の結果を表示する表示手段を用いてチェーン伸びを判定することを特徴とする。
【0010】
このように本発明においては、特定高周波数の報知音にすることで、乗客に聞こえることなく、また、稼動音、環境音の影響を受けない信頼性の高いエスカレーターのチェーン伸び検知方法を可能とした。
【0011】
【発明の実施の形態】
以下、本発明のチェーンの伸び検知方法の実施の形態を図に基づいて説明する。
【0012】
図1は音響装置が用いられるエスカレーターの全体構成図、図2はハンドレール駆動装置部の拡大図でチェーン近傍に設ける音響装置の取付け構成を示す概要図、図3は音響装置の構成を示す正面図、図4は音響装置の構成を示す側面図、図5は音響装置の接触部、支持部の構成における第2の実施形態を示す正面図、図6は測定に用いる診断装置のブロック図、図7は正常稼動音周波数特性を示す概要図、図8は報知音の周波数特性の特徴を示す概要図、図9は診断装置の動作を示すフローチャートである。
【0013】
一般に、搬送装置、例えばエスカレーターは図1に示すように、上部機械室内に設けられたエスカレーター駆動用ドライビングマシン1の駆動回転を、ドライビングチェーン2で上部駆動用踏段チェーンスプロケット3に伝達し、上部駆動用踏段チェーンスプロケット3は、下部従動用踏段チェーンスプロケット4と踏段チェーン5により連結されている。踏段6は踏段チェーン5に無端状に固定されており、上記駆動用踏段チェーンスプロケット3の回転に同期して動く。また、上部駆動用踏段チェーンスプロケット3はドライビングシャフト7に嵌合されているとともに、このドライビングシャフト7にはハンドレール駆動用スプロケット8も嵌合されている。これにより、ハンドレール駆動用スプロケット8の回転をハンドレール駆動チェーン9でハンドレール駆動装置10に伝達し、このハンドレール駆動装置10に伝達された回転を利用して無端状に配置されたハンドレール11が上部駆動用踏段チェーンスプロケット3の回転に同期して動く。
【0014】
このような構成において、先ず音響装置12の取付けは図2に示すようにハンドレール駆動装置10のハンドレール駆動装置取付け台13に設置するが、ハンドレール駆動装置10の構造から狭圧駆動チェーン14の伸び発生時、最も狭圧駆動チェーン14の弛みが起こり、また所定量狭圧駆動チェーン14が弛むと接触する狭圧駆動チェーン14近傍に設置する。これにより狭圧駆動チェーン14の伸び発生時、弛んだ狭圧駆動チェーン14が音響装置12と接触し、報知音を発生させる。
【0015】
次に音響装置12の構造は、図3、図4に示すように、狭圧駆動チェーン14との接触部15aと、接触部15aと溶接等で固定され、接触部15aが伸びの発生した狭圧駆動チェーン14との接触により生じる振動を伝播する板状の支持材16aと、前記支持材16aに、切り込み加工等をして設けられ、接触部15aに伸びの発生した狭圧駆動チェーン14が接触して生じる振動に共振して特定周波数を発生する弁部17、弁部17の振動を増幅する弁部錘18と、前記ハンドレール駆動装置取付け台13に設置するL字型の台座19と、台座19に設けた長穴20と、台座19とハンドレール駆動装置取付け台13を固定するボルト21、ナット22、また支持材16aと台座19の固定用に設けた長穴23と、ボルト24、ナット25で構成される。ここで、接触部15aは、狭圧駆動チェーン14の回転方向に関係なく狭圧駆動チェーン14の回転を妨げないR付形状である。
【0016】
狭圧駆動チェーン14との接触部15aが接触した時に発生する音響装置12の固定は、台座19と支持材16aを長穴23の任意の位置でボルト24、ナット25で片端固定し、台座19とハンドレール駆動装置取付け台13を台座の長穴20で接触部15aが狭圧駆動チェーン14の伸びが所定量になると接触する任意の位置にボルト21、ナット22で固定する。ここで、狭圧駆動チェーン14と接触する接触部15aの材質、振動する支持材16aの厚さ、支持材16aの片端固定位置から接触部15aまでの長さなどの音響発生部位条件の組み合わせで、発生する報知音の特定周波数を数種設定可能となる。
【0017】
また、狭圧駆動チェーン14との接触部15aと、支持材16aの形状は図5に示すように支持材16bの先端にRが形成されるよう曲げ加工をし、曲げ加工部を接触部15bとしても良い。更に、接触部15bの中に錘24を設けても良い。
【0018】
また、支持材16aの形状について、支持材16a長さが設置条件により確保できない場合を想定し、支持材16cに切り込み加工等をして設けた弁部17、弁部錘18を備えたが、十分支持材16aの長さを確保でき、自励振動で十分報知音の音圧を確保できる場合は、弁部を設けなくても良い。
【0019】
次に、報知音判定の基準は、同一機種の正常状態を複数回採取して正常と定めた音もしくは、同一現場のチェーン調整が正常な状態で、音響装置12を設置した時に測定した正常化同音に基づき、定めたものとする。
【0020】
図6に示す測定に用いる診断装置27のブロック図において、28はエスカレーターの稼動音を検出する集音手段であり、29は集音手段28から出力されるエスカレーター稼動音を記憶する記憶手段、30は記憶手段29に記憶されたエスカレーター稼動音測定値を周波数解析する演算手段、31は演算手段30で求めた演算結果と、予め正常音の特定周波数音圧から定めた所定値の比較により同等と見なせる場合を合格、値が大きく同等と見なせない場合を不合格とする合否判定手段、32は合否判定手段31または、演算手段30の結果を表示する表示手段である。
【0021】
図7の演算手段30で演算したエスカレーター稼動音を周波数解析した周波数特性を示す概要図において、横軸には周波数、縦軸には音圧がとってある。ここで、点線部で示した値は正常状態での特定周波数領域では越えることのない音圧の値、すなわち、上述した「予め定めた基準となる所定の値」である。ここで、図8に示す波形の説明を行うと、エスカレーターの狭圧駆動チェーン14の伸びが発生し、音響装置12により報知音が発生した場合、特定周波数の箇所で所定値を超える音圧33が発生する。これにより伸び異常の判定が可能となる。
【0022】
次に、本実施形態の動作を図9に示すフローチャートを用い説明する。図9は図6に示す診断装置27の動作を示すフローチャートである。稼動音測定に際し、保守員はエスカレーター上の安全な位置かつ、できるだけ診断部位に近いところで、集音手段28を設置する。
【0023】
次に、稼動音測定開始すると(図9に示す手順S)、集音手段28は、測定音データを出力する(手順S)。
【0024】
出力された測定音データは記憶手段29に順次格納される(手順S)。測定を作業者が任意に終了した時点で作業者は測定音データの合否判定の開始指令を行う(手順S)。ここで演算手段30は周波数解析を行い、合否判定手段31は、所定の正常化同音データと測定音データとの比較を行う(手順S)。
【0025】
この合否判定で、測定音データが正常稼動音データと同等とみなされる場合は、合格の表示を表示手段32にて行い処理を終了する(手順S)。しかし、測定音データの特定周波数の音圧が所定値を越え、正常稼動音データと同等とみなされない不合格の場合(手順S)には、ハンドレール駆動チェーン異常の表示を表示手段32にて行い処理を終了する(手順S)。
【0026】
このように構成した実施形態によれば、一般の乗客に不安を与えることなく、熟練知識を要さずに誰でも正常異常を表示手段32によって知ることができ、チェーン伸び発生時のチェーン再調整作業または、チェーンの交換作業を実施できる。
【0027】
尚、本実施形態では、狭圧駆動チェーン14の伸び判定方法について記載したが、狭圧駆動チェーン14以外のチェーンについても同様の音響装置12を設けて、それぞれ異なる報知音周波数の設定を行えば、複数の異常が同時に発生しても各々の異常箇所の認識、区別が可能となる。
【0028】
また、上記本実施形態の説明では、表示手段32を設ける例について説明したが、集音手段28をエスカレーター内に設け、表示手段32を設けずに外部との通信手段を設け、測定データを当該通信手段により外部の所定箇所、例えばエスカレーターの保守員が所属する営業所のパーソナルコンピュータへ送信し、判定する構成にしてもよい。
【0029】
ここで、現場仕様、調整時各種条件を入力可能とし、データベースとして管理し、所定時間経過後の測定データと調整データを比較し、異常状態の有無を診断しても良い。
【0030】
【発明の効果】
以上に説明したように、本発明であるチェーン伸び判定方法は、エスカレーターを停止させないため、手間、時間を要せずにチェーン伸びの検知ができる。また、報知音を正常稼動時の暗騒音に含まれる音圧が低い、稼動音の影響を受けない特定高周波数に設定するため、乗客に聞こえない報知音でチェーン伸び判定ができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係るエスカレーターの概要図である。
【図2】音響装置の取付け構成を示す概要図である。
【図3】音響装置の構成を示す正面図である。
【図4】音響装置の構成を示す側面図である。
【図5】音響装置の接触部、支持部の構成における第2の実施形態を示す正面図である。
【図6】測定に用いる診断装置の構成を示すブロック図である。
【図7】正常稼動音周波数特性を示す概要図である。
【図8】報知音の周波数特性の特徴を示す概要図である。
【図9】診断装置の動作を示すフローチャートである。
【符号の説明】
1 ドライビングマシン
2 ドライビングチェーン
3 上部駆動用踏段チェーンスプロケット
4 下部従動用踏段チェーンスプロケット
5 踏段チェーン
6 踏段
7 ドライビングシャフト
8 ハンドレール駆動用スプロケット
9 ハンドレール駆動チェーン
10 ハンドレール駆動装置
11 ハンドレール
12 音響装置
13 ハンドレール駆動装置取付け台
14 狭圧駆動チェーン
15a 接触部
15b 接触部
16a 支持材
16b 支持材
17 弁部
18 弁部錘
19 台座
20 台座長穴
21 ボルト(台座19、ハンドレール駆動装置取付け台13を固定)
22 ナット(台座19、ハンドレール駆動装置取付け台13を固定)
23 支持材長穴
24 ボルト(支持材16aと台座19を固定)
25 ナット(支持材16aと台座19を固定)
26 錘
27 診断装置
28 集音手段
29 記憶手段
30 演算手段
31 合否判定手段
32 表示手段
33 所定値を越える音圧
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for detecting chain elongation of an escalator.
[0002]
[Prior art]
Conventionally, a device that notifies the detection of chain elongation of the escalator by an alarm sound, etc., has a structure in which an acoustic object is brought into contact with a part that fluctuates when chain elongation etc. occurs by a mechanism, and abnormalities are generated by the alarm sound generated by contact Some devices are provided with a notification device (for example, see Patent Document 1).
[0003]
Further, a chain roller passage detection unit that detects passage of the chain roller and outputs an output signal, and a determination unit that quantitatively determines elongation of the chain based on at least one of a pulse period and a pulse width of the output signal. There is a chain elongation diagnostic device that is provided with such a device (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP-A-7-206354 (paragraph number 0007, FIG. 2)
[0005]
[Patent Document 2]
JP-A-11-194024 (paragraph number 0015-0018, FIG. 1)
[0006]
[Problems to be solved by the invention]
The notification sound generated by contact with an acoustic object in the method of detecting chain elongation without stopping the escalator of the related art can be heard by ordinary passengers, and may cause anxiety to passengers as abnormal sounds. On the other hand, when the operating sound or the surrounding environmental sound is large, the notification sound may not be heard because the operating sound or the surrounding environmental sound is buried in the operating sound or the surrounding environmental sound. In addition, elongation determination by a sensor, such as detecting a passage period of a chain, has problems in that the device is complicated, that installation is troublesome, and that the device is expensive.
[0007]
An object of the present invention is to set the notification sound at the time of chain elongation to a specific high frequency so that the notification sound cannot be heard by ordinary passengers when the escalator is operated, and it is diagnosed without being affected by the operation sound and the surrounding environmental sound. It is an object of the present invention to provide a method for detecting a possible chain extension of an escalator.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an object of the present invention is to provide an acoustic device that generates a notification sound by contacting a chain at a loose part of a chain when a chain elongation of an escalator occurs, and notifies the generation of the chain elongation by a notification sound. The escalator chain elongation detection method detects the chain elongation without stopping the escalator. When the chain elongation occurs, the notification sound of a frequency outside the audible range or a specific high frequency with low sound pressure included in background noise during normal operation Is generated from the acoustic device, and when the sound pressure at a specific frequency exceeds a predetermined value, it is determined that chain elongation has occurred.
[0009]
A sound collection unit that collects the operation sound of the escalator at a location away from the acoustic device while the escalator is operating; a storage unit that stores the operation sound collected by the sound collection unit; and a frequency analysis of the stored measurement value. Chain elongation using an operation means for performing the operation, a pass / fail judgment means for comparing an operation value calculated by the operation means with a predetermined value, and diagnosing abnormality, and a display means for displaying a result of the operation means or the pass / fail judgment means. Is determined.
[0010]
As described above, in the present invention, by making the notification sound of the specific high frequency, it is possible to detect a chain extension of the escalator with high reliability without being audible to passengers and without being affected by operation sound and environmental sound. did.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a chain elongation detecting method according to the present invention will be described with reference to the drawings.
[0012]
1 is an overall configuration diagram of an escalator using an audio device, FIG. 2 is an enlarged view of a handrail drive unit, and is a schematic diagram illustrating an installation configuration of an audio device provided near a chain, and FIG. 3 is a front view illustrating a configuration of the audio device. FIG. 4, FIG. 4 is a side view showing the configuration of the acoustic device, FIG. 5 is a front view showing the second embodiment of the configuration of the contact portion and support portion of the acoustic device, FIG. 6 is a block diagram of a diagnostic device used for measurement, 7 is a schematic diagram showing the frequency characteristics of the normal operation sound, FIG. 8 is a schematic diagram showing the characteristics of the frequency characteristics of the notification sound, and FIG. 9 is a flowchart showing the operation of the diagnostic device.
[0013]
In general, as shown in FIG. 1, a transfer device, for example, an escalator, transmits the drive rotation of an escalator drive driving machine 1 provided in an upper machine room to a drive chain 2 for an upper drive step chain sprocket 3 by a driving chain 2. The step chain sprocket 3 for use is connected to a step chain sprocket 4 for lower driven by a step chain 5. The step 6 is fixed to the step chain 5 endlessly, and moves in synchronization with the rotation of the drive step chain sprocket 3. The upper drive step chain sprocket 3 is fitted to a driving shaft 7, and a handrail drive sprocket 8 is also fitted to the driving shaft 7. Thus, the rotation of the handrail driving sprocket 8 is transmitted to the handrail driving device 10 by the handrail driving chain 9, and the endless handrail is arranged by utilizing the rotation transmitted to the handrail driving device 10. 11 moves in synchronization with the rotation of the upper drive step chain sprocket 3.
[0014]
In such a configuration, the acoustic device 12 is first mounted on the handrail drive device mounting base 13 of the handrail drive device 10 as shown in FIG. When the elongation occurs, the slack of the narrow-pressure drive chain 14 occurs most, and the narrow-pressure drive chain 14 is installed in the vicinity of the narrow-pressure drive chain 14 that comes into contact with the slack of the narrow-pressure drive chain 14 by a predetermined amount. As a result, when the narrow pressure drive chain 14 elongates, the slack narrow pressure drive chain 14 comes into contact with the acoustic device 12 to generate a notification sound.
[0015]
Next, as shown in FIGS. 3 and 4, the structure of the acoustic device 12 is such that the contact portion 15a with the narrow pressure drive chain 14 is fixed to the contact portion 15a by welding or the like, and the contact portion 15a is elongated. A plate-shaped support member 16a that propagates vibration generated by contact with the pressure drive chain 14 and a narrow pressure drive chain 14 that is provided by cutting or the like in the support member 16a and has an elongated contact portion 15a. A valve portion 17 that resonates with vibration generated upon contact to generate a specific frequency, a valve weight 18 that amplifies the vibration of the valve portion 17, and an L-shaped pedestal 19 installed on the handrail drive device mounting base 13. An elongated hole 20 provided in the pedestal 19, a bolt 21 and a nut 22 for fixing the pedestal 19 and the handrail driving device mounting base 13, and an elongated hole 23 provided for fixing the support 16a to the pedestal 19; , Nut 2 In constructed. Here, the contact portion 15a has an R-shaped shape that does not hinder the rotation of the narrow pressure drive chain 14 regardless of the rotation direction of the narrow pressure drive chain 14.
[0016]
To fix the acoustic device 12 generated when the contact portion 15a comes into contact with the narrow pressure drive chain 14, the base 19 and the support member 16a are fixed at one end with bolts 24 and nuts 25 at arbitrary positions of the elongated hole 23, and the base 19 is fixed. And the handrail driving device mounting base 13 is fixed to an arbitrary position where the contact portion 15a comes into contact with the elongate hole 20 of the pedestal when the extension of the narrow pressure driving chain 14 reaches a predetermined amount by the bolt 21 and the nut 22. Here, the combination of the sound generation site conditions such as the material of the contact portion 15a that comes into contact with the narrow pressure drive chain 14, the thickness of the vibrating support member 16a, and the length from the fixed position of one end of the support member 16a to the contact portion 15a. It is possible to set several types of specific frequencies of the generated notification sound.
[0017]
Further, as shown in FIG. 5, the shape of the contact portion 15a with the narrow pressure drive chain 14 and the support member 16a is bent so that an R is formed at the tip of the support member 16b. It is good. Further, a weight 24 may be provided in the contact portion 15b.
[0018]
Also, regarding the shape of the support member 16a, assuming a case where the length of the support member 16a cannot be ensured due to the installation conditions, the valve member 17 and the valve portion weight 18 provided by cutting the support member 16c are provided. When the length of the support member 16a can be sufficiently secured and the sound pressure of the notification sound can be sufficiently secured by self-excited vibration, the valve section may not be provided.
[0019]
Next, the criterion for the notification sound is a sound determined to be normal by sampling the normal state of the same model a plurality of times or a normalization measured when the acoustic device 12 is installed in a state where the chain adjustment at the same site is normal. It shall be determined based on the same sound.
[0020]
In the block diagram of the diagnostic device 27 used for the measurement shown in FIG. 6, reference numeral 28 denotes sound collecting means for detecting the operating sound of the escalator; 29, storage means for storing the escalator operating sound output from the sound collecting means 28; Is a calculating means for frequency-analyzing the escalator operation sound measurement value stored in the storage means 29, and 31 is equivalent by comparing the calculation result obtained by the calculating means 30 with a predetermined value previously determined from a specific frequency sound pressure of a normal sound. Pass / fail judgment means 32 is judged as pass if it can be regarded as being acceptable, and rejected if it cannot be regarded as having a large value, and a display means 32 for displaying the result of the pass / fail judgment means 31 or the arithmetic means 30.
[0021]
In the schematic diagram showing the frequency characteristics of the escalator operating sound calculated by the calculating means 30 in FIG. 7, the frequency is plotted on the horizontal axis and the sound pressure is plotted on the vertical axis. Here, the value indicated by the dotted line is the value of the sound pressure that does not exceed in the specific frequency region in the normal state, that is, the above-mentioned “predetermined reference predetermined value”. Here, the waveform shown in FIG. 8 will be described. When the extension of the narrow pressure drive chain 14 of the escalator occurs and the notification sound is generated by the acoustic device 12, the sound pressure 33 exceeding a predetermined value at a specific frequency is used. Occurs. This makes it possible to determine the abnormal elongation.
[0022]
Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG. FIG. 9 is a flowchart showing the operation of the diagnostic device 27 shown in FIG. When measuring the operation sound, the maintenance staff installs the sound collecting means 28 at a safe position on the escalator and as close as possible to the diagnosis site.
[0023]
Next, when starting operation noise measurement (Step S 1 shown in FIG. 9), the sound collecting means 28 outputs the test sound data (Step S 2).
[0024]
Output measured sound data is sequentially stored in the storage unit 29 (Step S 3). Operator when the operator has arbitrarily measurement ends do start command acceptance determination of test sound data (Step S 4). Here, the calculating means 30 performs a frequency analysis, and the pass / fail determination means 31 compares predetermined normalized homophonic data with measured sound data (step S 5 ).
[0025]
In this acceptance determination, if the test sound data is considered equivalent to the normal operation sound data, the processing is terminated to display a pass on the display unit 32 (Step S 6). However, when the sound pressure of the specific frequency of the measured sound data exceeds a predetermined value and is not regarded as being equivalent to the normal operation sound data (step S 7 ), the display means 32 displays the display of the handrail drive chain abnormality on the display means 32. To end the process (step S 8 ).
[0026]
According to the embodiment configured as described above, anybody can know the normal / abnormal state by the display means 32 without giving any anxiety to ordinary passengers and without any skill, and the chain is readjusted when a chain elongation occurs. Work or chain replacement work can be performed.
[0027]
In the present embodiment, the method of determining elongation of the narrow pressure drive chain 14 has been described. However, a similar sound device 12 may be provided for chains other than the narrow pressure drive chain 14 to set different notification sound frequencies. Even if a plurality of abnormalities occur at the same time, it is possible to recognize and distinguish each abnormal location.
[0028]
Further, in the above description of the present embodiment, the example in which the display means 32 is provided has been described. However, the sound collecting means 28 is provided in the escalator, and the communication means with the outside is provided without providing the display means 32, and the measurement data is provided. The information may be transmitted to a predetermined external location, for example, a personal computer of a business office to which the maintenance person of the escalator belongs, and determined by the communication means.
[0029]
Here, site specifications and various conditions at the time of adjustment may be input and managed as a database, and measurement data after a predetermined time has passed and adjustment data may be compared to diagnose the presence or absence of an abnormal state.
[0030]
【The invention's effect】
As described above, the chain elongation determination method according to the present invention does not stop the escalator, so that the elongation of the chain can be detected without trouble and time. Further, since the notification sound is set to a specific high frequency at which the sound pressure included in the background noise during normal operation is low and is not affected by the operation sound, the chain elongation can be determined by the notification sound which cannot be heard by the passenger.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an escalator according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing a mounting configuration of the acoustic device.
FIG. 3 is a front view showing the configuration of the acoustic device.
FIG. 4 is a side view showing the configuration of the acoustic device.
FIG. 5 is a front view showing a second embodiment of the configuration of the contact portion and the support portion of the acoustic device.
FIG. 6 is a block diagram illustrating a configuration of a diagnostic device used for measurement.
FIG. 7 is a schematic diagram showing a normal operation sound frequency characteristic.
FIG. 8 is a schematic diagram showing characteristics of frequency characteristics of a notification sound.
FIG. 9 is a flowchart showing the operation of the diagnostic device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Driving machine 2 Driving chain 3 Upper drive step chain sprocket 4 Lower driven step chain sprocket 5 Step chain 6 Step 7 Driving shaft 8 Handrail drive sprocket 9 Handrail drive chain 10 Handrail drive 11 Handrail 12 Sound device 13 Hand rail drive mounting base 14 Narrow pressure drive chain 15a Contact part 15b Contact part 16a Support member 16b Support member 17 Valve part 18 Valve weight 19 Pedestal 20 Pedestal long hole 21 Bolt (pedestal 19, hand rail drive mounting base 13) Fixed)
22 Nut (fixes pedestal 19 and handrail drive mounting base 13)
23 Support material slot 24 Bolt (fixes support material 16a and pedestal 19)
25 Nut (fixes support 16a and pedestal 19)
26 Weight 27 Diagnosis device 28 Sound collecting means 29 Storage means 30 Calculation means 31 Pass / fail judgment means 32 Display means 33 Sound pressure exceeding a predetermined value

Claims (4)

エスカレーターのチェーン伸び発生時に、チェーン弛み部でチェーンと接触して報知音を発生する音響装置をチェーン近傍に設置し、チェーン伸び発生を報知音で知らせることによりエスカレーターを停止させずにチェーン伸びを検知するエスカレーターのチェーン伸び検知方法において、
チェーン伸び発生時には、可聴域外の周波数または、正常稼動時の暗騒音に含まれる音圧が低い特定高周波数の報知音が音響装置より発生し、特定周波数の音圧が所定値を越えるとチェーン伸び発生と判定することを特徴とするエスカレーターのチェーン伸び検知方法。
An acoustic device that generates an audible signal by contacting the chain at the loose part of the escalator when the escalator is stretched is installed in the vicinity of the chain. Escalator chain elongation detection method
At the time of chain elongation, the sound device generates a notification sound of a frequency outside the audible range or a specific high frequency with low sound pressure contained in background noise during normal operation, and if the sound pressure of the specific frequency exceeds a predetermined value, the chain elongation occurs. A method for detecting chain elongation of an escalator, which is characterized by determining occurrence.
エスカレーター稼動中に音響装置から離れた場所でエスカレーターの稼動音を集音する集音手段と、前記集音手段で集音した稼動音を記憶する記憶手段と、記憶した測定値を周波数解析する演算手段と前記演算手段で演算した演算値と予め定められた所定値を比較し異常を診断する合否判定手段と、演算手段または、合否判定手段の結果を表示する表示手段を用いてチェーン伸びを判定することを特徴とする請求項1記載のエスカレーターのチェーン伸び検知方法。A sound collecting means for collecting the operating sound of the escalator at a location away from the acoustic device while the escalator is operating; a storing means for storing the operating sound collected by the sound collecting means; and an operation for frequency-analyzing the stored measurement value Means for estimating chain elongation by means of pass / fail determination means for diagnosing an abnormality by comparing the calculated value calculated by the means and the calculation means with a predetermined value, and display means for displaying the result of the calculation means or the pass / fail determination means The method for detecting chain elongation of an escalator according to claim 1, wherein: 板状で片端が支持され、自由端側が機構上最もチェーンの弛みが発生する箇所で、所定値の伸びが発生するチェーン回転中にチェーンとの接触による金属打撃音または、摩擦音を発生する位置に設置され、接触箇所から発生する自励振動による音響装置本体自身または、本体の中央に設けた一端を残し切り欠いた増幅共振部の共振音を報知音とし、報知音の音質は金属材質と、厚さ、長さ、固定端位置で制御し、任意の特定周波数に調整可能であることを特徴とする請求項1記載のエスカレーターのチェーン伸び検知方法。One end is supported in the form of a plate, and the free end is the position where the chain loosens most in the mechanism, and the position where the chain hits the metal during the rotation of the chain where the elongation of the specified value occurs or the friction noise is generated. Installed, the sound device itself by self-excited vibration generated from the contact point, or the resonance sound of the amplifying resonance part cut off leaving one end provided at the center of the body as the notification sound, the sound quality of the notification sound is a metal material, 2. The method according to claim 1, wherein the method is controlled by a thickness, a length, and a fixed end position, and can be adjusted to an arbitrary specific frequency. 前記所定値とは、同一機種のエスカレーターの正常状態を複数回採取して正常と定めた音、もしくは、測定対象となるエスカレーターの初期稼動時または、チェーン調整後に採取して正常と定めた音に基づき、異常診断用に定めた値であることを特徴とする請求項2記載のエスカレーターのチェーン伸び検知方法。The predetermined value is a sound determined as normal by collecting the normal state of the escalator of the same model a plurality of times, or at the time of the initial operation of the escalator to be measured, or a sound determined as normal after adjusting the chain. 3. The method according to claim 2, wherein the value is determined for abnormality diagnosis.
JP2003126388A 2003-05-01 2003-05-01 Chain elongation detection method for escalator Pending JP2004331260A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007230667A (en) * 2006-02-27 2007-09-13 Mitsubishi Electric Corp Escalator abnormality diagnostic system
JP2008013337A (en) * 2006-07-07 2008-01-24 Mitsubishi Electric Building Techno Service Co Ltd Seismic recovery operation device of escalator
JP2008095333A (en) * 2006-10-10 2008-04-24 Bunka Shutter Co Ltd Opening/closing device
JP2008201498A (en) * 2007-02-16 2008-09-04 Toshiba Elevator Co Ltd Passenger conveyer monitoring system
JP2020531771A (en) * 2017-08-17 2020-11-05 コリア・コンベイヤー・カンパニー・リミテッド Chain pin wear prediction method for roller chains using friction noise

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007230667A (en) * 2006-02-27 2007-09-13 Mitsubishi Electric Corp Escalator abnormality diagnostic system
JP2008013337A (en) * 2006-07-07 2008-01-24 Mitsubishi Electric Building Techno Service Co Ltd Seismic recovery operation device of escalator
JP2008095333A (en) * 2006-10-10 2008-04-24 Bunka Shutter Co Ltd Opening/closing device
JP2008201498A (en) * 2007-02-16 2008-09-04 Toshiba Elevator Co Ltd Passenger conveyer monitoring system
JP2020531771A (en) * 2017-08-17 2020-11-05 コリア・コンベイヤー・カンパニー・リミテッド Chain pin wear prediction method for roller chains using friction noise

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