JP2020112363A - Direct current electroscope - Google Patents

Direct current electroscope Download PDF

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JP2020112363A
JP2020112363A JP2019001185A JP2019001185A JP2020112363A JP 2020112363 A JP2020112363 A JP 2020112363A JP 2019001185 A JP2019001185 A JP 2019001185A JP 2019001185 A JP2019001185 A JP 2019001185A JP 2020112363 A JP2020112363 A JP 2020112363A
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detection
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detection unit
inspection
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JP7228880B2 (en
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茂敬 奥野
Shigenori Okuno
茂敬 奥野
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Hasegawa Electric Co Ltd
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Abstract

To perform the inspection before voltage detection reliably, and improve the workability in the inspection before the voltage detection.SOLUTION: A direct current electroscope includes: a charging detection unit 31 that detects an overhead line voltage via an electric detection metal fitting 39 by hooking and locking the electric detection metal fitting 39 attached to a tip side of a cylindrical operating rod 37 on the overhead wire; a disconnection detection unit 32 that detects a disconnection of a ground wire 40 that connects the electric detection fitting 39 to the ground via the charging detection unit 31; and an operation inspection unit 33 that inspects whether the charging detection unit 31 operates normally. A main body 35 of the detector that houses the charging detection unit 31, the disconnection detection unit 32, and the operation inspection unit 33 is provided on a proximal end side of the operating rod 37. A two-core line structure is provided in which a charging detection line 38 that electrically connects the electric detection metal fitting 39 and the charging detection unit 31 and an operation inspection line 41 that electrically connects the electric detection metal fitting 39 and the operation inspection unit 33 are housed in the operating rod 37.SELECTED DRAWING: Figure 1

Description

本発明は、例えば、電鉄沿線の架線電圧の有無を管理するために使用される電車線用の直流検電器に関する。 The present invention relates to, for example, a DC voltage detector for a train line used for managing the presence or absence of an overhead wire voltage along a railway.

電鉄沿線の架線には、1500V程度の直流電圧が変電所から送電されているが、保守管理上、任意的あるいは定期的に架線電圧の有無を任意の地点で検出する必要がある。 Although a DC voltage of about 1500 V is transmitted from the substation to the overhead line along the railway, it is necessary to detect the presence or absence of the overhead line voltage at an arbitrary point arbitrarily or periodically for maintenance management.

架線電圧の有無を検出する検電作業では、通常、架線が高所に位置することから手動で長さ調整可能な携帯式のものが必要である。本出願人は、以下の構造を有する電車線用の直流検電器を先に提案している(例えば、特許文献1参照)。 In the electric power detection work for detecting the presence or absence of the overhead line voltage, a portable type in which the length is manually adjustable is usually required because the overhead line is located at a high place. The present applicant has previously proposed a DC detector for an electric train line having the following structure (see, for example, Patent Document 1).

特許文献1で開示された直流検電器は、図5〜図7に示すように、充電検出部1と、断線検出部2と、動作点検部3とが収容された検電器本体5を具備する。検電器本体5は、複数の筒状部材6からなる絶縁性の操作棒7の基端側に取り付けられている。 As shown in FIGS. 5 to 7, the DC detector disclosed in Patent Document 1 includes a detector main body 5 in which a charge detector 1, a disconnection detector 2, and an operation checker 3 are housed. .. The main body 5 of the voltage detector is attached to the proximal end side of an insulating operating rod 7 formed of a plurality of tubular members 6.

図5は直流検電器の概略構成を示す。図6(A)は操作棒7を収縮させた状態、図6(B)は操作棒7を伸長させた状態を示す。図7は検電器本体5の外観を示すが、表示ランプ、ブザーや押しボタン等のスイッチ類を省略している。 FIG. 5 shows a schematic configuration of a DC voltage detector. FIG. 6A shows a state in which the operating rod 7 is contracted, and FIG. 6B shows a state in which the operating rod 7 is extended. FIG. 7 shows the appearance of the main body 5 of the voltage detector, but omits switches such as an indicator lamp, a buzzer and a push button.

充電検出部1は、操作棒7に内蔵された充電検出線8を介して、操作棒7の先端側に取り付けられた検電金具9と電気的に接続されている。充電検出部1は、検電金具9を架線(図示せず)に引掛け係止させることにより、検電金具9を介して架線電圧の有無を検出する回路である。 The charge detection unit 1 is electrically connected to a power detection fitting 9 attached to the tip end side of the operation rod 7 via a charge detection line 8 built in the operation rod 7. The charge detection unit 1 is a circuit that detects the presence or absence of an overhead wire voltage via the power detection metal fitting 9 by hooking and locking the power detection metal fitting 9 on an overhead power wire (not shown).

断線検出部2は、充電検出部1と接地線10との間に電気的に接続されている。断線検出部2は、充電検出部1を介して検電金具9をレールにアース接続する接地線10の断線を検出する回路である。 The disconnection detector 2 is electrically connected between the charge detector 1 and the ground wire 10. The disconnection detection unit 2 is a circuit that detects a disconnection of the ground wire 10 that grounds the power detection fitting 9 to the rail via the charging detection unit 1.

動作点検部3は、検電器本体5に設けられた点検電圧出力端子11および導電性プレート12と電気的に接続されている。動作点検部3は、検電前の点検時に、充電検出部1が正常に動作するか否かを点検する回路である。 The operation inspection unit 3 is electrically connected to the inspection voltage output terminal 11 and the conductive plate 12 provided on the main body 5 of the voltage detector. The operation inspection unit 3 is a circuit that inspects whether or not the charge detection unit 1 normally operates at the time of inspection before electric power detection.

操作棒7は、複数の筒状部材6を軸方向に引き出すことにより伸長され、逆に、筒状部材6を押し込むことにより収縮される。操作棒7の伸長状態および収縮状態は、留め具13の回転操作により保持される。 The operating rod 7 is extended by pulling out the plurality of tubular members 6 in the axial direction, and conversely is contracted by pushing in the tubular members 6. The extended state and the contracted state of the operating rod 7 are held by rotating the fastener 13.

操作棒7は、検電金具9と充電検出部1とを電気的に接続する充電検出線8が筒状部材6の内部に収容された一芯構造を有する。充電検出線8は、ロッドアンテナと称される伸縮自在なGFRP(肉厚2.5mm)製の導電管が使用されている。 The operation rod 7 has a one-core structure in which a charge detection wire 8 that electrically connects the power detection fitting 9 and the charge detection unit 1 is housed inside the tubular member 6. As the charge detection line 8, a flexible conductive tube made of GFRP (thickness 2.5 mm) called a rod antenna is used.

接地線10は、絶縁被覆電線として検電器本体5から導出されている。接地線10の先端部14は、磁気吸着によりレールあるいは導電性プレート12に着脱自在に固定可能なマグネット構造となっている。 The ground wire 10 is led out from the electroscope main body 5 as an insulation-coated electric wire. The tip portion 14 of the ground wire 10 has a magnet structure that can be detachably fixed to the rail or the conductive plate 12 by magnetic attraction.

なお、検電器本体5には、検電前の点検時に、動作点検線15が接続される点検電圧出力端子11が設けられている。動作点検線15は、直流検電器とは別体で用意されたカールコードと称される絶縁被覆電線である。 The voltage detector main body 5 is provided with an inspection voltage output terminal 11 to which an operation inspection line 15 is connected at the time of inspection before voltage detection. The operation inspection line 15 is an insulation-coated electric wire called a curl cord prepared separately from the DC voltage detector.

動作点検線15の基端部は、点検電圧出力端子11に接続可能なバナナプラグ16を有する。また、動作点検線15の先端部は、検電金具9に接続可能なワニ口クリップ17を有する。 The base end of the operation inspection line 15 has a banana plug 16 connectable to the inspection voltage output terminal 11. In addition, the tip of the operation inspection line 15 has an alligator clip 17 that can be connected to the power detection fitting 9.

以上の構成からなる直流検電器を使用した検電作業は、以下の要領で実施される。 The power detection work using the DC voltage detector having the above configuration is carried out as follows.

複数の筒状部材6を引き延ばした操作棒7の伸長状態で、接地線10の先端部14をレールに磁気吸着により固定することで、接地線10により充電検出部1をアース接続する。その上で、作業員が操作棒7の基端部を把持し、操作棒7の先端にある検電金具9を架線に引掛け係止させる。 The charging detection unit 1 is grounded by the ground wire 10 by fixing the tip portion 14 of the ground wire 10 to the rail by magnetic attraction while the operation rod 7 in which the plurality of cylindrical members 6 are extended is extended. Then, the operator grips the proximal end portion of the operating rod 7 and hooks the electroscopic metal fitting 9 at the tip of the operating rod 7 on the overhead wire to lock it.

これにより、架線に引掛け係止された検電金具9および操作棒7内の充電検出線8を介して充電検出部1に架線電圧が印加され、充電検出部1で架線電圧の有無を検出する。架線が充電状態にあれば、検電器本体5に設けられた表示ランプまたはブザーにより作業員に報知する。 As a result, an overhead wire voltage is applied to the charging detection unit 1 through the charging metal fitting 9 hooked to the overhead wire and the charging detection wire 8 in the operating rod 7, and the charging detection unit 1 detects the presence or absence of the overhead wire voltage. To do. If the overhead line is in a charged state, a worker is notified by a display lamp or a buzzer provided on the main body 5 of the voltage detector.

特開2002−372553号公報JP, 2002-372553, A

ところで、直流検電器による検電作業時、何等かの原因により接地線10が断線していたり、あるいは、充電検出部1が故障していたりする場合が考えられる。 By the way, it is conceivable that the ground wire 10 may be broken or the charge detection unit 1 may be broken due to some cause during the power detection work by the DC voltage detector.

その場合、接地線10の断線や充電検出部1の故障に気付かず、検電作業を開始すると、架線が充電状態にあるにもかかわらず、表示ランプまたはブザーによる報知がないことになる。そのため、作業員は架線が停電状態であると誤判断し、充電状態にある架線に触れる危険性がある。 In that case, if the disconnection of the ground wire 10 or the failure of the charge detection unit 1 is not noticed and the electric power detection work is started, there is no notification by the display lamp or the buzzer even though the overhead wire is in the charged state. Therefore, the worker may erroneously determine that the overhead line is in a power failure state and may touch the overhead line that is in a charged state.

このような危険性を回避するため、検電作業の開始に先立って、特許文献1で開示された直流検電器では、接地線10が断線しているか否かを検出すると共に、充電検出部1が正常に動作するか否かを点検することで、安全性の確保を図っている。 In order to avoid such a risk, the DC detector disclosed in Patent Document 1 detects whether or not the ground wire 10 is disconnected and starts charging operation before starting the power detection operation. The safety is ensured by inspecting whether the is operating normally.

つまり、接続線10の先端部14を検電器本体5の導電性プレート12に磁気吸着により接続固定する。これにより、断線検出部2で接地線10の断線を検出する。接地線10が断線していなければ、表示ランプまたはブザーにより、接地線10が断線していないことを作業員に報知する。 That is, the tip portion 14 of the connecting wire 10 is connected and fixed to the conductive plate 12 of the electroscope main body 5 by magnetic attraction. As a result, the disconnection detector 2 detects the disconnection of the ground wire 10. If the ground wire 10 is not broken, an indicator lamp or a buzzer notifies the worker that the ground wire 10 is not broken.

その後、用意していた動作点検線15のバナナプラグ16を検電器本体5の点検電圧出力端子11に接続すると共に、動作点検線15のワニ口クリップ17を収縮状態にある操作棒7の先端の検電金具19に接続する。 After that, the prepared banana plug 16 of the operation inspection line 15 is connected to the inspection voltage output terminal 11 of the main body of the voltage detector 5, and the alligator clip 17 of the operation inspection line 15 is attached to the tip of the operation rod 7 in the contracted state. It is connected to the power detection fitting 19.

この状態で、検電器本体5の点検スイッチ(図示せず)をオンすることにより、動作点検部3で点検電圧を発生させる。点検電圧は、動作点検線15を介して検電金具19に印加される。検電金具19に印加された点検電圧の有無を充電検出線15を介して充電検出部1で検出する。 In this state, by turning on the inspection switch (not shown) of the main body 5 of the voltage detector, the operation inspection unit 3 generates the inspection voltage. The inspection voltage is applied to the power detection fitting 19 via the operation inspection line 15. The presence or absence of the inspection voltage applied to the power detection fitting 19 is detected by the charge detection unit 1 via the charge detection line 15.

これにより、動作点検部3で発生した点検電圧を充電検出部1で検出できれば、充電検出部1が正常に動作していることになる。このようにして、充電検出部1が正常に動作することを、表示ランプまたはブザーにより作業員に報知する。 Accordingly, if the charge detection unit 1 can detect the check voltage generated in the operation check unit 3, it means that the charge detection unit 1 is operating normally. In this way, the operator is informed by the display lamp or the buzzer that the charge detection unit 1 operates normally.

以上のような検電前の点検を実施した上で、直流検電器による検電作業を開始することになるが、従来の動作点検線15を使用した検電前の点検では、以下のような懸念があった。 After performing the above-mentioned inspection before the power detection, the power detection work by the DC voltage detector is started. However, in the inspection before the power detection using the conventional operation inspection line 15, the following is performed. There was concern.

つまり、検電前の点検で使用する動作点検線15は、直流検電器とは別体で用意されたものである。そのため、直流検電器を現場へ搬送する際に、動作点検線15も現場へ搬送しなければならないことを作業員が忘れる可能性がある。 That is, the operation inspection line 15 used in the inspection before the voltage detection is prepared separately from the DC voltage detector. Therefore, when the DC detector is transported to the site, the worker may forget that the operation inspection line 15 must also be transported to the site.

このように、動作点検線15を現場へ搬送することを忘れると、検電前の点検を実施することが不可能となり、検電作業の安全性を確保することが困難となる。 In this way, if it is forgotten to carry the operation inspection line 15 to the site, it becomes impossible to perform the inspection before the power detection, and it becomes difficult to secure the safety of the power detection work.

一方、検電前の点検時、動作点検線15のバナナプラグ16を検電器本体5の点検電圧出力端子11に接続すると共に、動作点検線15のワニ口クリップ17を検電金具19に接続しなければならない。 On the other hand, at the time of inspection before electric power detection, the banana plug 16 of the operation inspection wire 15 is connected to the inspection voltage output terminal 11 of the electric detector body 5, and the crocodile clip 17 of the operation inspection wire 15 is connected to the electric detection metal fitting 19. There must be.

この一連の接続作業が作業員にとって煩雑なものであることから、動作点検線15が現場にあっても、作業員が検電前の点検を実施しないことも想定される。このような検電前の点検の不実施も、検電作業の安全性を欠くことになる。 Since this series of connection work is complicated for the worker, it is assumed that the worker does not carry out the inspection before the power detection even if the operation inspection line 15 is on site. Even if such inspection is not performed before the electric power detection, the safety of the electric power detection work is lost.

そこで、本発明は、前述の課題に鑑みて提案されたもので、その目的とするところは、検電前の点検を確実に実施させると共に、検電前の点検での作業性を向上させ得る直流検電器を提供することにある。 Therefore, the present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to make sure the inspection before the electric power detection is performed and improve the workability in the inspection before the electric power detection. It is to provide a DC voltage detector.

本発明の直流検電器は、筒状の操作棒の先端側に取り付けられた検電金具を検電対象物に引掛け係止させることにより、検電金具を介して検電対象物の充電電圧を検出する充電検出部と、充電検出部を介して検電金具をアース接続する接地線の断線を検出する断線検出部と、充電検出部が正常に動作するか否かを点検する動作点検部とを備えている。 The DC voltage detector of the present invention is a charging voltage of an object to be detected through the voltage detecting metal fitting by hooking and locking the voltage detecting metal fitting attached to the tip end side of the tubular operation rod on the object to be detected. , A disconnection detection unit that detects disconnection of the ground wire that connects the power detection fitting to the ground via the charging detection unit, and an operation inspection unit that inspects whether the charging detection unit operates normally. It has and.

本発明の直流検電器は、充電検出部、断線検出部および動作点検部が収容された検電器本体を、操作棒の基端側に設けた構造を具備する。 The DC detector of the present invention has a structure in which a detector main body accommodating a charge detection unit, a disconnection detection unit, and an operation inspection unit is provided on the proximal end side of the operation rod.

前述した目的を達成するための技術的手段として、本発明は、検電金具と充電検出部とを電気的に接続する充電検出線と、検電金具と動作点検部とを電気的に接続する動作点検線とが、操作棒の内部に収容された二芯構造としたことを特徴とする。 As a technical means for achieving the above-mentioned object, the present invention electrically connects a charging detection wire that electrically connects a power detection metal fitting and a charging detection portion, and an electric power detection metal fitting and an operation inspection portion. The operation inspection line has a two-core structure housed inside the operation rod.

本発明では、充電検出線と共に動作点検線も操作棒の内部に収容した二芯構造としたことにより、直流検電器による検電作業に先立って、充電検出部が正常に動作するか否かを動作点検部で点検する検電前の点検を確実かつ簡易に実施することができる。 According to the present invention, by adopting the two-core structure in which the operation inspection line is housed inside the operation rod together with the charge detection line, it is possible to determine whether or not the charge detection unit normally operates prior to the power detection work by the DC voltage detector. It is possible to surely and easily perform the inspection before the electric power detection, which is inspected by the operation inspection unit.

本発明における操作棒は、複数の筒状部材で構成することにより伸縮自在とし、充電検出線および動作点検線は、螺旋状に巻回された絶縁被覆電線で構成することにより伸縮可能とした構造が望ましい。 The operation rod in the present invention is configured to be expandable and contractible by being configured with a plurality of tubular members, and the charge detection line and the operation inspection line are configured to be expandable and contractable by being configured with an insulation-coated electric wire wound in a spiral shape. Is desirable.

このような構造を採用すれば、筒状部材を伸長させることで長尺な操作棒を実現することができる。また、筒状部材の伸長に伴って充電検出線および動作点検線も伸長させることができる。その結果、検電対象物が高所に存在する架線である場合に好適である。 If such a structure is adopted, a long operation rod can be realized by extending the tubular member. Further, the charge detection line and the operation inspection line can be extended along with the extension of the tubular member. As a result, it is suitable in the case where the object to be detected is an overhead line existing at a high place.

本発明における操作棒は、単一の筒状部材で構成すると共に、充電検出線および動作点検線は、ストレート状に延びる絶縁被覆電線で構成することが望ましい。 It is desirable that the operating rod in the present invention be formed of a single cylindrical member, and that the charge detection line and the operation inspection line be formed of an insulation-coated electric wire that extends straight.

このような構造を採用すれば、短尺な操作棒を実現することができ、充電検出線および動作点検線もストレート状の絶縁被覆電線で済む。その結果、検電対象物が低所に存在する地下鉄のサードレール式電車線である場合に好適である。 If such a structure is adopted, a short operation rod can be realized, and the charge detection line and the operation inspection line can be straight insulation-coated wires. As a result, it is suitable for the case where the object to be detected is a third rail type train line of a subway existing in a low place.

本発明において、動作点検部と電気的に接続され、接地線の先端部が断接可能に取り付けられる導電性プレートを、検電器本体に形成された凹部内に配設した構造が望ましい。 In the present invention, it is desirable that a conductive plate, which is electrically connected to the operation inspection unit and to which the tip of the ground wire is detachably attached, is provided in a recess formed in the main body of the voltage detector.

検電前の点検時、接地線を導電性プレートに接続することで、導電性プレートと検電金具との間に高電圧の点検電圧が印加される。これに対して、導電性プレートが検電器本体の凹部内にあることから、作業員が導電性プレートに触れ難くなる。その結果、感電事故を防止でき、点検作業の安全性を確保できる。 By connecting the ground wire to the conductive plate at the time of inspection before voltage detection, a high-voltage inspection voltage is applied between the conductive plate and the voltage detection metal fitting. On the other hand, since the conductive plate is inside the concave portion of the electroscope main body, it is difficult for an operator to touch the conductive plate. As a result, an electric shock accident can be prevented and the safety of inspection work can be ensured.

本発明によれば、充電検出線と共に動作点検線も操作棒の内部に収容した二芯構造としたことにより、直流検電器による検電作業を開始するに先立って、充電検出部が正常に動作するか否かを動作点検部で点検する検電前の点検を確実かつ簡易に実施することができる。 According to the present invention, the two-core structure in which the operation inspection line is housed inside the operation rod together with the charge detection line allows the charge detection unit to operate normally before starting the power detection work by the DC voltage detector. It is possible to surely and easily perform the inspection before the electric power detection in which the operation inspection unit inspects whether or not to perform.

その結果、直流検電器による検電作業時、従来のような動作点検線の搬送ミスや、動作点検線の煩雑な接続がなくなるので、検電前の点検において、作業時間の短縮化が図れて作業性が大幅に向上する。 As a result, during the power detection work with the DC voltage detector, there is no longer a mistake in transporting the operation inspection line or the complicated connection of the operation inspection line as in the past, so the work time can be shortened in the inspection before the electricity detection. Workability is greatly improved.

本発明の実施形態で、直流検電器の概略構成を示すブロック図である。FIG. 3 is a block diagram showing a schematic configuration of a DC detector in the embodiment of the present invention. 図1の直流検電器で、(A)は操作棒を収縮させた状態を示す正面図、(B)は操作棒を伸長させた状態を示す正面図である。In the DC detector of FIG. 1, (A) is a front view showing a state where the operating rod is contracted, and (B) is a front view showing a state where the operating rod is extended. 図1の検電器本体の外観を示す斜視図である。It is a perspective view which shows the external appearance of the electroscope main body of FIG. 本発明の他の実施形態で、直流検電器の外観を示す正面図である。It is a front view which shows the external appearance of the direct-current detector in other embodiment of this invention. 従来の直流検電器の概略構成を示すブロック図である。It is a block diagram which shows the schematic structure of the conventional DC voltage detector. 図5の直流検電器で、(A)は操作棒を収縮させた状態を示す正面図、(B)は操作棒を伸長させた状態を示す正面図である。In the DC detector of FIG. 5, (A) is a front view showing a state where the operating rod is contracted, and (B) is a front view showing a state where the operating rod is extended. 図5の検電器本体の外観を示す斜視図である。It is a perspective view which shows the external appearance of the electroscope main body of FIG.

本発明に係る直流検電器の実施形態を図面に基づいて以下に詳述する。以下の実施形態では、電車線用の直流検電器、つまり、検電対象物として架線を例示するが、本発明は、架線以外の他の検電対象物であっても適用可能である。 An embodiment of a DC detector according to the present invention will be described in detail below with reference to the drawings. In the following embodiments, a DC detector for an electric train line, that is, an overhead wire is exemplified as an object to be detected, but the present invention can be applied to an object to be detected other than the overhead wire.

この実施形態の直流検電器は、1500V程度の直流電圧が送電される電鉄沿線の架線を保守管理するため、任意的あるいは定期的に架線電圧の有無を任意の地点で検出するものである。架線電圧の有無を検出する検電作業では、通常、架線が高所に位置することから手動で長さ調整可能な携帯式のものが使用される。 The DC detector of this embodiment is for detecting the presence or absence of the overhead line voltage at an arbitrary point in an arbitrary or periodical manner in order to maintain and manage an overhead line along a railway line to which a DC voltage of about 1500 V is transmitted. In the power detection work for detecting the presence or absence of the overhead line voltage, a portable type in which the length is manually adjustable is usually used because the overhead line is located at a high place.

この実施形態の直流検電器は、図1〜図3に示すように、充電検出部31と、断線検出部32と、動作点検部33とが収容された検電器本体35を具備する。検電器本体35は、複数の筒状部材36からなる絶縁性の操作棒37の基端側に取り付けられている。 As shown in FIGS. 1 to 3, the DC detector of this embodiment includes a detector main body 35 in which a charge detector 31, a disconnection detector 32, and an operation checker 33 are housed. The electroscope main body 35 is attached to the proximal end side of an insulating operation rod 37 composed of a plurality of tubular members 36.

図1は直流検電器の概略構成を示す。図2(A)は操作棒37を収縮させた状態、図2(B)は操作棒37を伸長させた状態を示す。図3は検電器本体35の外観を示すが、表示ランプ、ブザーや押しボタン等のスイッチ類を省略している。 FIG. 1 shows a schematic configuration of a DC voltage detector. 2A shows a state in which the operating rod 37 is contracted, and FIG. 2B shows a state in which the operating rod 37 is extended. FIG. 3 shows the appearance of the main body 35 of the voltage detector, but omits switches such as an indicator lamp, a buzzer and a push button.

充電検出部31は、操作棒37に内蔵された充電検出線38を介して、操作棒37の先端側に取り付けられたフック状の検電金具39と電気的に接続されている。充電検出部31は、検電金具39を架線に引掛け係止させることにより、検電金具39を介して架線電圧の有無を検出抵抗(図示せず)により検出する回路である。 The charge detection unit 31 is electrically connected to a hook-shaped power detection fitting 39 attached to the distal end side of the operation rod 37 via a charge detection line 38 incorporated in the operation rod 37. The charging detection unit 31 is a circuit that detects the presence or absence of an overhead wire voltage via a detection resistor 39 (not shown) by hooking and locking the power detection fitting 39 on the overhead wire.

断線検出部32は、充電検出部31と接地線40との間に電気的に接続されている。断線検出部32は、充電検出部31を介して検電金具39を被接地部位であるレールにアース接続する接地線40の断線を検出する回路である。 The disconnection detector 32 is electrically connected between the charge detector 31 and the ground wire 40. The disconnection detection unit 32 is a circuit that detects a disconnection of the ground wire 40 that grounds the power detection fitting 39 to the rail that is the grounded portion via the charge detection unit 31.

動作点検部33は、操作棒37に内蔵された動作点検線41、および検電器本体35に設けられた導電性プレート42と電気的に接続されている。動作点検部33は、検電前の点検時に、充電検出部31が正常に動作するか否かを点検する回路である。 The operation inspection section 33 is electrically connected to an operation inspection line 41 built in the operation rod 37 and a conductive plate 42 provided on the electroscope main body 35. The operation inspection unit 33 is a circuit that inspects whether or not the charge detection unit 31 normally operates at the time of inspection before electric power detection.

操作棒37は、検電金具39と充電検出部31とを電気的に接続する充電検出線38と、検電金具39と動作点検部33とを電気的に接続する動作点検線41とが、筒状部材36の内部に収容された二芯構造を有する。 The operation rod 37 includes a charge detection line 38 that electrically connects the power detection fitting 39 and the charge detection unit 31, and an operation check line 41 that electrically connects the power detection fitting 39 and the operation check unit 33. It has a two-core structure housed inside the tubular member 36.

充電検出線38および動作点検線41には、螺旋状に巻回された伸縮可能な絶縁被覆電線49、例えばカールコードと称されるものが使用されている。この実施形態では、ストレート状の絶縁被覆電線である充電検出線38および動作点検線41を二芯として一本のカールコードとした絶縁被覆電線49を例示している。 As the charge detection line 38 and the operation inspection line 41, a stretchable insulating covered electric wire 49 wound in a spiral shape, for example, a so-called curl cord is used. This embodiment exemplifies an insulation-coated electric wire 49 in which the charging detection wire 38 and the operation inspection wire 41, which are straight insulation-coated electric wires, are two cores and one curl cord.

充電検出線38には、検電金具39と充電検出部31との間に介挿された限流抵抗43(例えば10MΩ程度)が設けられている。限流抵抗43を設けることにより、不所望な高電圧(AC4000V程度)が充電検出部31に侵入することを防止している。 The charging detection line 38 is provided with a current limiting resistor 43 (for example, about 10 MΩ) interposed between the power detection fitting 39 and the charging detection unit 31. By providing the current limiting resistor 43, it is possible to prevent an undesired high voltage (about 4000 V AC) from entering the charge detection unit 31.

動作点検線41には、検電金具39と動作点検部33との間に介挿された限流抵抗44(例えば10MΩ程度)が設けられている。限流抵抗44を設けることにより、不所望な高電圧(AC4000V程度)が動作点検部33に侵入することを防止している。 The operation inspection line 41 is provided with a current limiting resistor 44 (for example, about 10 MΩ) interposed between the electromotive metal fitting 39 and the operation inspection unit 33. By providing the current limiting resistor 44, it is possible to prevent an undesired high voltage (about 4000 V AC) from entering the operation inspection unit 33.

操作棒37は、例えばラジオのロッドアンテナのように、複数の筒状部材36で構成することで伸縮自在となっている。操作棒37を構成する筒状部材36には、エポキシ系GFRP(肉厚1mm)を採用する。これにより、限流抵抗43,44があっても操作棒37の軽量化が容易である。 The operation rod 37 can be expanded and contracted by being composed of a plurality of tubular members 36 like a rod antenna of a radio, for example. Epoxy-based GFRP (thickness 1 mm) is adopted for the tubular member 36 forming the operation rod 37. This makes it easy to reduce the weight of the operating rod 37 even if there are current limiting resistors 43 and 44.

最も内側に位置する最小径の筒状部材36の先端に検電金具39が取り付けられている。また、最も外側に位置する最大径の筒状部材36の基端に検電器本体35が取り付けられている。この最大径の筒状部材36を作業員が把持する。 An electric power detection fitting 39 is attached to the tip of the cylindrical member 36 having the smallest diameter located on the innermost side. Further, the electroscope main body 35 is attached to the base end of the cylindrical member 36 having the maximum diameter located on the outermost side. A worker grips the tubular member 36 having the maximum diameter.

操作棒37の伸長は、筒状部材36を軸方向に順次引き出すことにより行われ、隣接する筒状部材36の端部同士の摩擦抵抗により長尺な状態が保持される。この時、筒状部材36の内部で、充電検出線38および動作点検線41も伸長した状態となる。 The operation rod 37 is extended by sequentially pulling out the tubular members 36 in the axial direction, and a long state is maintained by the frictional resistance between the end portions of the adjacent tubular members 36. At this time, the charging detection line 38 and the operation inspection line 41 are also expanded inside the tubular member 36.

操作棒37の収縮は、筒状部材36を軸方向に順次押し込むことにより、最も外側に位置する筒状部材36の内部に残りの筒状部材36が格納される。この時、筒状部材36の内部で充電検出線38および動作点検線41が収縮した状態となり、充電検出線38および動作点検線41の弾性力により、操作棒37の収縮状態が保持される。 As for the contraction of the operating rod 37, the remaining tubular member 36 is stored inside the outermost tubular member 36 by sequentially pushing the tubular member 36 in the axial direction. At this time, the charge detection line 38 and the operation inspection line 41 are contracted inside the tubular member 36, and the elastic state of the charge detection line 38 and the operation inspection line 41 holds the contracted state of the operating rod 37.

従来の操作棒7〔図6(A)(B)参照〕では、伸縮時の固定のために留め具13の回転操作が必要であったのに対して、この実施形態の操作棒37では、伸縮時の固定を筒状部材36の端部同士の摩擦抵抗で実現している。これにより、操作棒37の伸縮時、筒状部材36の引き出しおよび押し込みだけで済むため、作業性が大幅に向上する。 In the conventional operation rod 7 [see FIGS. 6(A) and 6(B)], the fastener 13 needs to be rotated for fixation during expansion and contraction, whereas in the operation rod 37 of this embodiment, Fixing during expansion and contraction is realized by frictional resistance between the ends of the tubular member 36. As a result, when the operating rod 37 is expanded or contracted, only the withdrawal and push-in of the tubular member 36 need be performed, and workability is greatly improved.

接地線40は、充電検出部31に接続されたアース線45と、断線検出部32に接続された断線検出線46とが収容された絶縁被覆構造で、検電器本体35から導出されている。接地線40の先端部47は、磁気吸着によりレールあるいは導電性プレート42に着脱自在に固定可能なマグネット構造となっている。 The ground wire 40 has an insulating coating structure in which a ground wire 45 connected to the charge detection unit 31 and a disconnection detection wire 46 connected to the disconnection detection unit 32 are housed, and is led out from the voltage detector main body 35. The tip 47 of the ground wire 40 has a magnet structure that can be detachably fixed to the rail or the conductive plate 42 by magnetic attraction.

検電器本体35は、検電前の点検で使用する導電性プレート42を有する。導電性プレート42は、検電器本体35の側面に形成された凹部48の底部に配設されている。 The voltage detector main body 35 has a conductive plate 42 used for inspection before voltage detection. The conductive plate 42 is arranged at the bottom of a recess 48 formed on the side surface of the electroscope main body 35.

検電前の点検時、接地線40の先端部47を導電性プレート42に接続することで、点検スイッチのオンにより動作点検部33で高電圧(2000V程度)が発生する。 By connecting the tip portion 47 of the ground wire 40 to the conductive plate 42 at the time of inspection before voltage detection, a high voltage (about 2000 V) is generated in the operation inspection unit 33 when the inspection switch is turned on.

これに対して、導電性プレート42が検電器本体35の凹部48内にあることから、作業員が導電性プレート42に触れ難くなる。その結果、高電圧による感電事故を防止することができ、点検作業の安全性を確保できる。 On the other hand, since the conductive plate 42 is in the recess 48 of the electroscope main body 35, it is difficult for an operator to touch the conductive plate 42. As a result, electric shock due to high voltage can be prevented, and safety of inspection work can be ensured.

ここで、直流検電器による検電作業時、何等かの原因により接地線40が断線していたり、あるいは、充電検出部31が故障していたりする場合が考えられる。 Here, it is conceivable that the ground wire 40 may be broken or the charge detection unit 31 may be broken due to some cause during the power detection work by the DC voltage detector.

その場合、接地線40の断線や充電検出部31の故障に気付かず、検電作業を開始すると、架線が充電状態にあるにもかかわらず、表示ランプまたはブザー等による報知がないことになる。そのため、作業員は架線が停電状態であると誤判断し、充電状態にある架線に触れる危険性がある。 In this case, if the disconnection of the ground wire 40 or the failure of the charge detection unit 31 is not noticed and the power detection work is started, there is no notification by the display lamp or the buzzer, etc., even though the overhead wire is in the charged state. Therefore, the worker may erroneously determine that the overhead line is in a power failure state and may touch the overhead line that is in a charged state.

このような危険性を回避するため、検電作業の開始に先立って、この実施形態の直流検電器では、接地線40が断線しているか否かを断線検出部32で検出すると共に、充電検出部31が正常に動作するか否かを動作点検部33で点検する検電前の点検を実施することで、安全性の確保を図っている。 In order to avoid such a risk, in the DC voltage detector of this embodiment, before the start of the power detection operation, the disconnection detection unit 32 detects whether or not the ground wire 40 is disconnected, and the charge detection is performed. Safety is ensured by performing an inspection before the power detection in which the operation inspection unit 33 inspects whether the unit 31 operates normally.

ここで、検電器本体35は、作業員が検電前の点検を実施せずに検電作業を開始しようとすると、表示ランプの点滅およびブザーの鳴動により、作業員に検電前の点検の実施を促す機能を具備している。作業員が検電前の点検を実施した場合には、表示ランプの点灯およびブザーの鳴動により、検電作業が開始可能であることを報知する。 Here, when the worker tries to start the power detection work without performing the inspection before the power detection, the voltage detector main body 35 causes the worker to check the power before the power detection by blinking the display lamp and sounding the buzzer. It has a function to encourage implementation. When the worker performs the inspection before the voltage detection, the indicator lamp is lit and the buzzer sounds to notify that the voltage detection work can be started.

検電前の点検では、まず、接続線40の先端部47を検電器本体35の導電性プレート42に磁気吸着により接続固定する。これにより、接地線40が断線していなければ、表示ランプまたはブザーにより、接地線40が断線していないことを作業員に報知する。 In the inspection before the voltage detection, first, the tip 47 of the connection wire 40 is connected and fixed to the conductive plate 42 of the voltage detector main body 35 by magnetic attraction. As a result, if the ground wire 40 is not broken, the operator is informed that the ground wire 40 is not broken by a display lamp or a buzzer.

その後、検電器本体35の点検スイッチ(図示せず)をオンすることにより、動作点検部33で高電圧(2000V)が発生する。これにより、限流抵抗43,44で分圧された点検電圧、つまり、架線電圧(1500V)に近い点検電圧(1000V程度)が動作点検線41を介して収縮状態の操作棒37の先端にある検電感具39に印加される。 Then, by turning on the inspection switch (not shown) of the main body 35 of the voltage detector, a high voltage (2000 V) is generated in the operation inspection unit 33. As a result, the inspection voltage divided by the current limiting resistors 43 and 44, that is, the inspection voltage (about 1000 V) close to the overhead line voltage (1500 V) is present at the tip of the contracted operating rod 37 via the operation inspection line 41. It is applied to the electro-sensing tool 39.

ここで、検電前の点検では、接地線40を導電性プレート42に接続した場合に限って、点検スイッチをオンすると、動作点検部33で高電圧が発生するように構成している。つまり、接地線40をレールに接続した場合には、点検スイッチをオンしても動作点検部33で高電圧が発生しないようにしている。 Here, in the inspection before the electric power detection, the high voltage is generated in the operation inspection unit 33 when the inspection switch is turned on only when the ground wire 40 is connected to the conductive plate 42. That is, when the ground wire 40 is connected to the rail, the operation inspection unit 33 does not generate a high voltage even if the inspection switch is turned on.

これにより、高電圧による感電事故を防止することができ、点検作業の安全性を図っている。また、検電作業中に動作点検部33で高電圧が発生することによる検電時の誤測定を回避することができる。 As a result, electric shock due to high voltage can be prevented and the safety of inspection work is improved. In addition, it is possible to avoid erroneous measurement at the time of power detection due to generation of a high voltage in the operation inspection unit 33 during the power detection work.

以上のようにして、検電金具39に印加された点検電圧は、操作棒37内の充電検出線43を介して充電検出部31に印加される。その充電検出部31では、点検電圧の有無を検出する。 As described above, the inspection voltage applied to the power detection fitting 39 is applied to the charge detection unit 31 via the charge detection line 43 in the operation rod 37. The charge detector 31 detects the presence or absence of the inspection voltage.

これにより、検電金具39に印加された点検電圧を充電検出部31で検出できれば、充電検出部31が正常に動作していることになる。このようにして、充電検出部31が正常に動作することを、表示ランプまたはブザーにより作業員に報知する。 As a result, if the charge detection unit 31 can detect the inspection voltage applied to the power detection fitting 39, it means that the charge detection unit 31 is operating normally. In this way, the operator is informed by the display lamp or the buzzer that the charge detection unit 31 operates normally.

以上のような検電前の点検を実施した上で、直流検電器による検電作業を開始する。この直流検電器を使用した検電作業は、以下の要領で実施される。 After performing the above-mentioned inspections before power detection, the power detection work by the DC voltage detector is started. The power detection work using this DC voltage detector is carried out as follows.

複数の筒状部材36を引き延ばした操作棒37の伸長状態で、接地線40の先端部47をレールまたは導電性プレート42に磁気吸着により固定することで、接地線40により充電検出部31をアース接続する。その上で、作業員が操作棒37の基端部を把持し、操作棒37の先端にある検電金具39を架線に引掛け係止させる。 By fixing the tip 47 of the ground wire 40 to the rail or the conductive plate 42 by magnetic attraction while the operation rod 37 in which the plurality of tubular members 36 are extended is extended, the charge detection unit 31 is grounded by the ground wire 40. Connecting. Then, the operator grips the base end portion of the operation rod 37, and hooks the electric detection metal fitting 39 at the tip of the operation rod 37 on the overhead wire to lock it.

これにより、架線に引掛け係止された検電金具39および操作棒37内の充電検出線38を介して充電検出部31に架線電圧が印加され、充電検出部31で架線電圧の有無を検出する。架線が充電状態にあれば、検電器本体35に設けられた表示ランプまたはブザーにより作業員に報知する。 As a result, an overhead wire voltage is applied to the charge detection unit 31 via the charging metal fitting 39 hooked on the overhead wire and the charging detection wire 38 in the operation rod 37, and the charge detection unit 31 detects the presence or absence of the overhead wire voltage. To do. If the overhead line is in a charged state, a worker is notified by a display lamp or a buzzer provided on the main body 35 of the voltage detector.

この実施形態では、操作棒37に動作点検線41を内蔵させたことにより、従来のように、直流検電器を現場へ搬送する際に、直流検電器とは別体の動作点検線15(図5参照)を現場へ搬送することを作業員が忘れることはない。また、動作点検線15が現場にあるにもかかわらず、作業員が検電前の点検を実施しないこともなくなる。 In this embodiment, since the operation inspection line 41 is built in the operation rod 37, when the DC detector is transported to the site as in the conventional case, the operation inspection line 15 (FIG. Workers will not forget to transport the above (see 5) to the site. Further, even if the operation inspection line 15 is in the field, the worker does not carry out the inspection before the electric power detection.

さらに、従来の動作点検線15のように、検電前の点検時、バナナプラグ16を検電器本体5の点検電圧出力端子11に接続すると共に、ワニ口クリップ17を検電金具9に接続するという煩雑な接続作業がなくなる。 Further, as in the conventional operation inspection line 15, at the time of inspection before voltage detection, the banana plug 16 is connected to the inspection voltage output terminal 11 of the voltage detector main body 5 and the alligator clip 17 is connected to the voltage detection metal fitting 9. There is no need for complicated connection work.

このように、充電検出線38と共に動作点検線41も操作棒37の内部に収容した二芯構造としたことで、従来のような動作点検線15の搬送ミスや、動作点検線15の煩雑な接続がなくなるので、検電前の点検を確実かつ簡易に実施できて作業性の向上が図れる。 As described above, the two-core structure in which the operation inspection line 41 is housed inside the operation rod 37 together with the charge detection line 38 makes it difficult to convey the operation inspection line 15 and the operation inspection line 15 is complicated. Since there is no connection, inspection before voltage detection can be performed reliably and easily and workability can be improved.

以上の実施形態では、操作棒37を複数の筒状部材36で構成することで伸縮自在とし、充電検出線38および動作点検線41を、螺旋状に巻回された絶縁被覆電線で構成することで伸縮可能とした場合を例示した。 In the above-described embodiment, the operation rod 37 is configured to be expandable and contractable by being configured by the plurality of tubular members 36, and the charge detection line 38 and the operation inspection line 41 are configured by the spirally wound insulating coated electric wire. The case where it can be expanded and contracted is illustrated.

この実施形態の場合、筒状部材36を伸長させることで長尺な操作棒37を実現することができる。また、筒状部材36の伸長に伴って充電検出線38および動作点検線41も伸長させることができる。その結果、検電対象物が高所に存在する架線である場合に好適である。 In the case of this embodiment, the elongated operation rod 37 can be realized by extending the tubular member 36. Further, the charging detection line 38 and the operation inspection line 41 can also be extended along with the extension of the tubular member 36. As a result, it is suitable in the case where the object to be detected is an overhead line existing at a high place.

一方、図4に示す実施形態のように、操作棒37’を単一の筒状部材36’で構成すると共に、充電検出線38’および動作点検線41’を、ストレート状に延びる絶縁被覆電線49’で構成することも可能である。この実施形態では、ストレート状の絶縁被覆電線である充電検出線38’および動作点検線41’を二芯として一本のストレートコードとした絶縁被覆電線49’を例示している。 On the other hand, as in the embodiment shown in FIG. 4, the operating rod 37' is composed of a single tubular member 36', and the charging detection line 38' and the operation inspection line 41' are straightly extended insulation-coated wires. It is also possible to compose 49'. This embodiment exemplifies an insulation-coated electric wire 49' in which the charging detection wire 38' and the operation check wire 41', which are straight insulation-coated wires, are two cores and one straight cord.

この実施形態における他の構成および作用効果は、図2(A)(B)に示す実施形態の直流検電器と同一であるため、同一部分には同一参照符号を付して重複説明は省略する。 Other configurations and effects of this embodiment are the same as those of the DC detector of the embodiment shown in FIGS. 2(A) and 2(B), and therefore, the same parts are designated by the same reference numerals and duplicate description will be omitted. ..

この実施形態の場合、短尺な操作棒37’を実現することができ、充電検出線38’および動作点検線41’もストレート状の絶縁被覆電線で済む。その結果、検電対象物が低所に存在する地下鉄のサードレール式電車線である場合に好適である。 In the case of this embodiment, a short operating rod 37' can be realized, and the charge detection line 38' and the operation inspection line 41' can also be straight insulation-coated wires. As a result, it is suitable for the case where the object to be detected is a third rail type train line of a subway existing in a low place.

なお、この実施形態の直流検電器では、サードレール式電車線に適合するように、略T字状の検電金具39’が操作棒37’の先端に取り付けられている。 In addition, in the DC voltage detector of this embodiment, a substantially T-shaped detection metal fitting 39' is attached to the tip of the operation rod 37' so as to fit the third rail type electric line.

本発明は前述した実施形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。 The present invention is not limited to the embodiments described above, and it is needless to say that the present invention can be implemented in various forms without departing from the scope of the present invention. It is indicated by the scope of the claims and further includes equivalent meanings to the claims and all modifications within the scope.

31 充電検出部
32 断線検出部
33 動作点検部
35 検電器本体
36 筒状部材
37 操作棒
38 充電検出線
39 検電金具
40 接地線
41 動作点検線
42 導電性プレート
48 凹部
31 Charge Detection Section 32 Disconnection Detection Section 33 Operation Inspection Section 35 Electrodetector Main Body 36 Cylindrical Member 37 Operation Rod 38 Charge Detection Line 39 Electric Detection Metal Fitting 40 Grounding Wire 41 Operation Inspection Line 42 Conductive Plate 48 Recess

Claims (4)

筒状の操作棒の先端側に取り付けられた検電金具を検電対象物に引掛け係止させることにより、前記検電金具を介して前記検電対象物の充電電圧を検出する充電検出部と、前記充電検出部を介して検電金具をアース接続する接地線の断線を検出する断線検出部と、前記充電検出部が正常に動作するか否かを点検する動作点検部とを備え、
前記充電検出部、前記断線検出部および前記動作点検部が収容された検電器本体を前記操作棒の基端側に設けた直流検電器であって、
前記検電金具と前記充電検出部とを電気的に接続する充電検出線と、前記検電金具と前記動作点検部とを電気的に接続する動作点検線とが、前記操作棒の内部に収容された二芯構造としたことを特徴とする直流検電器。
A charge detection unit that detects the charging voltage of the object to be detected through the electric detection fitting by hooking and locking the electric detection fitting attached to the tip end side of the tubular operation rod on the object to be detected. And a disconnection detection unit that detects a disconnection of a ground wire that grounds the power detection fitting through the charging detection unit, and an operation inspection unit that inspects whether the charging detection unit operates normally,
A direct-current voltage detector in which the charging detection unit, the disconnection detection unit, and the detector main body accommodating the operation inspection unit are provided on the proximal end side of the operation rod,
A charge detection line that electrically connects the power detection fitting and the charge detection unit and an operation check line that electrically connects the power detection fitting and the operation check unit are housed inside the operating rod. DC detector with a two-core structure.
前記操作棒は、複数の筒状部材で構成することにより伸縮自在とし、前記充電検出線および前記動作点検線は、螺旋状に巻回された絶縁被覆電線で構成することにより伸縮可能とした請求項1に記載の直流検電器。 The operation rod can be expanded and contracted by being configured by a plurality of tubular members, and the charge detection line and the operation inspection line can be extended and contracted by being configured by an insulating coated electric wire wound in a spiral shape. The DC voltage detector according to Item 1. 前記操作棒は、単一の筒状部材で構成すると共に、前記充電検出線および前記動作点検線は、ストレート状に延びる絶縁被覆電線で構成した請求項1に記載の直流検電器。 2. The DC voltage detector according to claim 1, wherein the operation rod is composed of a single cylindrical member, and the charge detection line and the operation inspection line are composed of insulation-coated wires extending straight. 前記動作点検部と電気的に接続され、前記接地線の先端部が断接可能に取り付けられる導電性プレートを、前記検電器本体に形成された凹部内に配設した請求項1〜3のいずれか一項に記載の直流検電器。 4. A conductive plate electrically connected to the operation inspection unit and having a tip end portion of the ground wire detachably attached thereto is provided in a recess formed in the main body of the voltage detector. The DC voltage detector according to 1 above.
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