JP7440896B2 - Wear-resistant insulation sheet - Google Patents
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Description
本発明は、架空電線の樹木などが近接している縁廻し部、本線部、碍子および絶縁カバー部などに装着し、樹木から架空電線を保護するために用いられる耐摩耗絶縁シートに関する。 The present invention relates to a wear-resistant insulating sheet that is attached to the edge portion, main wire portion, insulator, insulating cover portion, etc. of overhead electric wires in close proximity to trees, etc., and used to protect the overhead electric wires from trees.
従来技術の耐摩耗絶縁シートは、例えば特許文献１に電線絶縁カバーシートとして記載されている。この従来技術の電線絶縁カバーシートは、矩形のシート体と、シート体が挿入される透明な袋状体と、電線に逆Ｕ字状に掛止められたシート体および袋状体の互い対向する端部同士を固定する手段とを備えている。 A conventional wear-resistant insulating sheet is described, for example, in Patent Document 1 as a wire insulating cover sheet. This conventional electric wire insulating cover sheet includes a rectangular sheet body, a transparent bag-like body into which the sheet body is inserted, and a sheet body and a bag-like body that are hooked onto electric wires in an inverted U-shape, and the sheet body and the bag-like body face each other. and means for fixing the ends together.
シート体は、電気絶縁性を有する可撓性の合成樹脂材料として、ポリエチレン、エチレン酢酸ビニル共重合体、ポリ塩化ビニルなどによって形成された複数のシート状体が積層され、それらのシート状体の全周が溶着されている。シート体の一方の表面のほぼ四隅には、袋状体に固定するための面状ファスナが貼着されている。 Sheet bodies are made by laminating multiple sheet bodies made of electrically insulating flexible synthetic resin materials such as polyethylene, ethylene vinyl acetate copolymer, polyvinyl chloride, etc. Welded all around. Plane fasteners for fixing to the bag-like body are attached to approximately four corners of one surface of the sheet body.
袋状体は、耐熱性を有する可撓性の合成樹脂材料として、ポリ塩化ビニリデンによって形成され、内周面にはシート体の面状ファスナに係合する面状ファスナが貼着されている。このような袋状体には、シート体が挿入され、開口端が部分的に開口させた状態で溶着されている。 The bag-like body is made of polyvinylidene chloride as a heat-resistant and flexible synthetic resin material, and has a sheet fastener attached to its inner peripheral surface to engage with the sheet fastener of the sheet body. A sheet body is inserted into such a bag-like body and welded with the open end left partially open.
このように、この従来技術では、電線との摩擦熱によって溶融して燃えだすこと、雨やほこりなどによって電線絶縁シート体に表示された耐電圧値、労働省検定番号などが消えてしまうこと、およびシート体を貫通する傷が生じることを防止することができる電線絶縁カバーシートが提案されている。 In this way, with this conventional technology, there are problems such as melting and burning due to frictional heat from the electric wire, loss of withstand voltage value, Ministry of Labor certification number, etc. displayed on the electric wire insulating sheet due to rain or dust, and A wire insulating cover sheet has been proposed that can prevent scratches from penetrating the sheet body.
前述の従来技術では、電線の近くに樹木があると、成長した樹木の枝が電線絶縁カバーシートに接触し、大きな摩擦で摺動する。これによって電線絶縁カバーシートの袋状体が損耗し、やがて破損してしまうことになる。袋状体が破損すると、樹木の枝は、袋状体に挿入されているシート体の表面に接触し、風の作用によって大きな摩擦力で摺動し、シート体をも破損してしまう。このように、この従来技術では、シート体を透明な袋状体に挿入する構成であるので、電線絶縁カバーシートが損傷していても、保全管理を担当する作業者は電線絶縁カバーシートの損傷を容易に見つけることが困難であり、電気絶縁カバーシートが交換されないまま放置されてしまうおそれがある。 In the above-mentioned conventional technology, if there is a tree near the electric wire, the branches of the grown tree come into contact with the electric wire insulation cover sheet and slide with large friction. This causes the bag-like body of the wire insulation cover sheet to wear out and eventually break. When the bag is damaged, the branches of the tree come into contact with the surface of the sheet inserted into the bag and slide with a large frictional force due to the action of the wind, damaging the sheet as well. In this way, in this conventional technology, the sheet body is inserted into a transparent bag-like body, so even if the wire insulation cover sheet is damaged, the worker in charge of maintenance management can prevent damage to the wire insulation cover sheet. It is difficult to easily find the electrically insulating cover sheet, and there is a risk that the electrically insulating cover sheet may be left unreplaced.
また、シート体が透明な袋状体に挿入されているので、日射などの光が電気絶縁カバーシートに照射されると、袋状体による反射および袋状体を透過した光の内部での乱反射によって、地上から架空電線に装着された電気絶縁カバーシートを見ても、電気絶縁カバーシートの損傷の有無を確認することが困難である。そのため、高所作業車などによって、各電線に取り付けられている電気絶縁カバーシートの近傍で確認作業を行わなければならず、保守管理作業に多大な手間および労力を要してしまう、という問題がある。 In addition, since the sheet body is inserted into a transparent bag-like body, when light such as sunlight is irradiated onto the electrically insulating cover sheet, it is reflected by the bag-like body and diffused reflection inside the bag-like body. Therefore, it is difficult to check whether or not the electrical insulating cover sheet is damaged even when looking at the electrical insulating cover sheet attached to the overhead power lines from the ground. Therefore, confirmation work must be carried out near the electrical insulation cover sheet attached to each electric wire using an aerial work vehicle, which causes the problem of requiring a great deal of time and effort for maintenance management work. be.
本発明の目的は、作業者が離れた位置で容易かつ確実に損傷の有無を確認することができる耐摩耗絶縁シートを提供することである。 An object of the present invention is to provide a wear-resistant insulating sheet that allows an operator to easily and reliably check the presence or absence of damage from a remote location.
本発明は、電気絶縁性を有する、予め定める第１色の合成樹脂から成る可撓性の摩耗層と、
電気絶縁性を有する、前記第１色とは異なる第２色の合成樹脂から成り、前記摩耗層に積層される可撓性の摩耗検知層と、を含み、前記摩耗層を外側にして電線に装着される矩形の耐摩耗絶縁シートであって、
前記摩耗層は、
前記摩耗検知層に重なる積層部と、
前記摩耗検知層の周縁部の少なくとも１つの縁辺部の側面を被覆する側面被覆部と、を有し、
前記側面被覆部は、前記摩耗検知層の、該側面被覆部が設けられた前記縁辺部の側面から垂直な方向に、前記側面被覆部の厚みＴの２倍以上、５倍以下の幅Ｗを有していることを特徴とする耐摩耗絶縁シートである。
The present invention provides a flexible wear layer made of a synthetic resin of a predetermined first color and having electrical insulation properties;
a flexible wear detection layer made of a synthetic resin of a second color different from the first color and having electrical insulation properties, and laminated on the wear layer, and attached to the electric wire with the wear layer on the outside. A rectangular wear-resistant insulation sheet to be attached,
The wear layer is
a laminated portion overlapping the wear detection layer;
a side covering portion that covers a side surface of at least one edge portion of the peripheral edge portion of the wear detection layer ;
The side surface covering portion has a width W of at least twice and no more than 5 times the thickness T of the side surface covering portion in a direction perpendicular to the side surface of the edge portion of the wear detection layer on which the side surface covering portion is provided. This is a wear-resistant insulating sheet characterized by having the following characteristics .
また本発明は、前記摩耗検知層の前記摩耗層によって覆われていない摩耗検知層表面および前記側面被覆部の前記摩耗検知層表面の外周側に連なる側面被覆部表面には、粘着性を有する粘着層が設けられていることを特徴とする。 Further, the present invention provides a surface of the wear detection layer that is not covered by the wear layer of the wear detection layer and a surface of the side surface covering part that is continuous to the outer peripheral side of the surface of the wear detection layer of the side surface covering part. It is characterized by having a layer.
本発明によれば、電線に摩耗層を外側にして耐摩耗絶縁シートが装着された状態では、耐摩耗絶縁シートの摩耗検知層の第２色が内側となり、少なくとも１つの縁辺部の側面も摩耗層の側面被覆部によって被覆されているので、摩耗検知層が外部に露出せず、地上からは実質上、第１色の摩耗層だけが視認される。これによって、日射などの光が摩耗層によって反射している状態であっても、耐摩耗絶縁シートが摩耗していると誤認することが防がれ、摩耗状態を確認するための無駄な手間および労力の発生を回避することができる。このような誤認による無駄な手間および労力の回避は、山間部および市街地などの広域の配電管区で電線の保全維持管理を行う上で、大きなコスト削減となり、実効性に優れた耐摩耗絶縁シートを提供することができる。 According to the present invention, when the wear-resistant insulating sheet is attached to the wire with the wear layer on the outside, the second color of the wear detection layer of the wear-resistant insulation sheet is on the inside, and the side surface of at least one edge part is also worn out. Since the wear detection layer is covered by the side surface covering portion of the layer, the wear detection layer is not exposed to the outside, and substantially only the wear layer of the first color is visible from the ground. This prevents the misunderstanding that the wear-resistant insulating sheet is worn even when sunlight or other light is reflected by the wear layer. The occurrence of labor can be avoided. Avoiding wasted time and effort due to such misidentification will lead to significant cost reductions when maintaining and managing electric wires in wide-area power distribution areas, such as mountainous areas and urban areas. can be provided.
また本発明によれば、側面被覆部は、摩耗検知層の縁辺部の側面から該側面に垂直な方向の幅Ｗが、側面被覆部の厚みＴの２倍以上、５倍以下に形成されるので、摩耗検知層の縁辺部の側面は側面被覆部の側面から幅方向において内側に耐摩耗絶縁シートが長期間にわたって電線に装着され、熱膨張または熱収縮による反りや浮きなどの変形によって、耐摩耗絶縁シートと、その下地となる電線との間、または耐摩耗絶縁シートと、その下地となる耐摩耗絶縁シートの重なり部との間に隙間が生じても、厚みＴの２倍以上５倍以下の幅Ｗを有する側面被覆部によって、摩耗検知層は外部からは見えず、作業者が耐摩耗絶縁シートに摩耗が発生していると誤認することが防がれる。 Further, according to the present invention, the side surface covering portion is formed such that the width W in the direction perpendicular to the side surface from the side surface of the edge portion of the wear detection layer is at least twice and no more than 5 times the thickness T of the side surface covering portion. Therefore, a wear-resistant insulating sheet is attached to the wire on the side surface of the edge part of the wear-sensing layer in the width direction from the side surface of the side-covering part for a long period of time. Even if there is a gap between the wear-resistant insulation sheet and the underlying wire, or between the wear-resistant insulation sheet and the overlap between the wear-resistant insulation sheet and the underlying wear-resistant insulation sheet, the thickness shall be at least 2 times and 5 times the thickness T. Due to the side covering portion having the following width W, the abrasion detection layer is not visible from the outside, and an operator is prevented from mistakenly assuming that abrasion has occurred in the abrasion resistant insulating sheet.
また本発明によれば、摩耗検知層表面および側面被覆部表面に粘着層が設けられるので、電線に耐摩耗絶縁シートを巻き付けると、粘着層が電線の外表面または先行して電線に巻き付けられている耐摩耗絶縁シートの外表面に粘着し、耐摩耗絶縁シートが電線に保持され、耐摩耗絶縁シートを容易かつ迅速に電線に取付けることができる。したがって、高所作業車のバケットなどに作業者が乗った状態で耐摩耗絶縁シートを電線に取り付ける高所作業を行うに際して、作業者は煩雑な作業を行う必要がなく、高所で不安定なバケット上であっても、作業者は簡便に耐摩耗絶縁シートを電線に取り付けることが可能となり、取付け性に優れた耐摩耗絶縁シートを提供することができる。 Further, according to the present invention, since the adhesive layer is provided on the surface of the wear detection layer and the surface of the side covering part, when the wear-resistant insulating sheet is wrapped around the electric wire, the adhesive layer is applied to the outer surface of the electric wire or is previously wrapped around the electric wire. The wear-resistant insulation sheet adheres to the outer surface of the wire, and the wear-resistant insulation sheet is held on the wire, allowing the wear-resistant insulation sheet to be easily and quickly attached to the wire. Therefore, when performing work at heights where a worker is attached to electric wires with wear-resistant insulation sheets while riding in the bucket of an aerial work vehicle, the worker does not have to perform complicated work and is unstable at heights. A worker can easily attach the wear-resistant insulating sheet to the electric wire even on a bucket, and it is possible to provide a wear-resistant insulating sheet with excellent attachment properties.
図１は本発明の一実施形態の耐摩耗絶縁シート１を示す正面図であり、図２は図１の切断面線ＩＩ－ＩＩから見た耐摩耗絶縁シート１の拡大断面図であり、図３は耐摩耗絶縁シート１が電線Ｃに取付けられた使用例１を示す斜視図である。本実施形態では、山間地および市街地を問わず、樹木３に近接して架設されている電線Ｃまたは電線防護カバーを樹木３から保護するために用いられる耐摩耗絶縁シート１について説明する。本実施形態の耐摩耗絶縁シート１は、電気絶縁性を有する、予め定める第１色、例えば黒色の合成樹脂から成る可撓性の摩耗層４と、電気絶縁性を有する、第１色とは異なる第２色である、例えば黄色の合成樹脂から成り、摩耗層４に積層される可撓性の摩耗検知層５と、を含む。 FIG. 1 is a front view showing a wear-resistant insulating sheet 1 according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the wear-resistant insulating sheet 1 taken along the section line II-II in FIG. 3 is a perspective view showing usage example 1 in which the wear-resistant insulating sheet 1 is attached to the electric wire C. In this embodiment, a wear-resistant insulating sheet 1 used to protect electric wires C or electric wire protective covers installed near trees 3 from trees 3, regardless of whether it is in a mountainous area or an urban area, will be described. The abrasion-resistant insulating sheet 1 of the present embodiment includes a flexible abrasion layer 4 made of synthetic resin of a predetermined first color, for example black, which has electrical insulation properties, and a first color which has electrical insulation properties. It includes a flexible wear detection layer 5 made of synthetic resin of a different second color, for example yellow, and laminated on the wear layer 4 .
耐摩耗性絶縁シート１は、正面視において幅がＷ１、長さがＬ１の矩形の多層シート体であって、摩耗層４を外側にして電線Ｃに装着され、樹木３の枝６が電線Ｃへ直接接触することを防ぎ、電線Ｃの金属製の芯線Ｃ１を被覆している樹脂製の被覆層Ｃ２の摩耗を防ぎ、電線Ｃを保護するように構成されている。 The wear-resistant insulating sheet 1 is a rectangular multilayer sheet with a width W1 and a length L1 when viewed from the front, and is attached to the electric wire C with the wear layer 4 on the outside, so that the branches 6 of the tree 3 are attached to the electric wire C. It is configured to protect the electric wire C by preventing direct contact with the metal core C1 of the electric wire C and preventing abrasion of the resin coating layer C2 that covers the metal core C1 of the electric wire C.
耐摩耗絶縁シート１のサイズ（幅Ｗ１×長さＬ１×厚みＴ１）について参考までに述べると、１５０ｍｍ×２５０ｍｍ×２．０ｍｍ、３００ｍｍ×５００ｍｍ×２．０ｍｍ、６００ｍｍ×８００ｍｍ×２．０ｍｍなどの短尺シートの他、幅Ｗ１が１５０ｍｍ、３００ｍｍ、６００ｍｍなどであり、長さＬ１が０．５ｍ～１０ｍの長尺シートがある。耐摩耗絶縁シート１の厚さＴ１は、２ｍｍ～３．５ｍｍ程度である。このような幅Ｗ１、長さＬ１、厚みＴ１は、上記の寸法に限定されるものではなく、電線Ｃのサイズ、使用環境、耐用年数などに応じて適切な寸法を製造可能である。 For reference, the size of the wear-resistant insulating sheet 1 (width W1 x length L1 x thickness T1) is 150 mm x 250 mm x 2.0 mm, 300 mm x 500 mm x 2.0 mm, 600 mm x 800 mm x 2.0 mm, etc. In addition to short sheets, there are long sheets with a width W1 of 150 mm, 300 mm, 600 mm, etc. and a length L1 of 0.5 m to 10 m. The thickness T1 of the wear-resistant insulating sheet 1 is approximately 2 mm to 3.5 mm. Such width W1, length L1, and thickness T1 are not limited to the above-mentioned dimensions, and appropriate dimensions can be manufactured according to the size, usage environment, service life, etc. of the electric wire C.
図４は耐摩耗絶縁シート１の側面被覆部１０付近の拡大断面図である。摩耗層４は、摩耗検知層５に重なる積層部７と、摩耗検知層５の周縁部の少なくとも１つの縁辺部８の側面９を被覆する側面被覆部１０と、を有する。側面被覆部１０は、摩耗検知層５の、該側面被覆部１０が設けられた縁辺部８の側面９から垂直な方向（図４では右方）に、側面被覆部１０の厚みＴ１の２倍以上、５倍以下の幅Ｗ（２・Ｔ≦Ｗ≦５・Ｔ）を有している。本実施形態では、摩耗検知層５の厚みＴ２は、例えば０．７ｍｍであり、積層部７の厚みＴ１は、例えば１．５ｍｍである。 FIG. 4 is an enlarged sectional view of the vicinity of the side surface covering portion 10 of the wear-resistant insulating sheet 1. As shown in FIG. The wear layer 4 has a laminated portion 7 that overlaps the wear detection layer 5 and a side surface covering portion 10 that covers the side surface 9 of at least one edge portion 8 of the peripheral edge of the wear detection layer 5 . The side surface covering portion 10 has a thickness twice as thick as the thickness T1 of the side surface covering portion 10 in a direction perpendicular to the side surface 9 of the edge portion 8 of the wear detection layer 5 (to the right in FIG. 4). As described above, the width W (2·T≦W≦5·T) is 5 times or less. In this embodiment, the thickness T2 of the wear detection layer 5 is, for example, 0.7 mm, and the thickness T1 of the laminated portion 7 is, for example, 1.5 mm.
摩耗検知層５の摩耗層４によって覆われていない摩耗検知層表面１１および側面被覆部１０の摩耗検知層表面１１の外周側に連なる側面被覆部表面１２には、粘着性を有する粘着層１３が設けられている。粘着層１３は、側面被覆層１０の側面１４から内側に距離ΔＷだけ退避し、側面被覆部表面１２の一部が露出している。粘着層１３の厚みＴ３は、例えば１．０ｍｍ程度である。粘着層１３が側面被覆層１０の側面１４から内側に距離ΔＷだけ退避して形成されるので、耐摩耗絶縁シート１の取付け前の巻取り状態では、シート側面から粘着層１３がはみ出さないので、作業者の手などに粘着層１３が付着することを防止することができる。また、耐摩耗絶縁シート１の取付け後においては、シート側面から粘着層１３がはみ出さないので、粘着層１３にゴミなどの異物が付着して絶縁性が低下することを防止することができる。 On the wear detection layer surface 11 of the wear detection layer 5 that is not covered by the wear layer 4 and on the side surface coating part surface 12 continuous to the outer peripheral side of the wear detection layer surface 11 of the side surface coating part 10, an adhesive layer 13 having adhesiveness is provided. It is provided. The adhesive layer 13 is retracted inward from the side surface 14 of the side surface coating layer 10 by a distance ΔW, and a portion of the side surface coating surface 12 is exposed. The thickness T3 of the adhesive layer 13 is, for example, about 1.0 mm. Since the adhesive layer 13 is formed by retracting the distance ΔW inward from the side surface 14 of the side surface coating layer 10, the adhesive layer 13 does not protrude from the side surface of the sheet when the wear-resistant insulating sheet 1 is rolled up before being attached. It is possible to prevent the adhesive layer 13 from adhering to the hands of the worker. Further, after the wear-resistant insulating sheet 1 is attached, the adhesive layer 13 does not protrude from the side surface of the sheet, so that it is possible to prevent foreign matter such as dust from adhering to the adhesive layer 13 and reducing the insulation properties.
粘着層１３は、本実施形態では、前述の各サイズのうち、幅Ｗ＝１５０ｍｍの短尺シートおよび長尺シートだけに設けられ、他のサイズである幅Ｗ１＝３００、Ｗ１＝６００の短尺シートおよび長尺シートには設けられていない構成としたが、他の実施形態ではすべてのサイズの耐摩耗絶縁シートに粘着層１３が設けられてもよく、あるいはすべてのサイズの耐摩耗絶縁シート１に粘着層１３を設けない構成であってもよい。 In this embodiment, the adhesive layer 13 is provided only on short sheets and long sheets with a width W=150 mm among the above-mentioned sizes, and is provided only on short sheets and long sheets with widths W1=300 and W1=600, which are other sizes. Although the long sheet is not provided with the adhesive layer 13, in other embodiments, the adhesive layer 13 may be provided on all sizes of wear-resistant insulation sheets 1, or the adhesive layer 13 may be provided on all sizes of wear-resistant insulation sheets 1. A configuration in which the layer 13 is not provided may be used.
摩耗層４の材料としては、例えば、ポリエチレン、塩素化ポリエチレン、ポリ塩化ビニル、ウレタン、エチレン酢酸ビニル共重合体、オレフィン系エラストマ、ポリエステル系エラストマ、ポリウレタン系エラストマ、スチレン系エラストマ、ブチルゴムのうちのいずれか１種を用いるようにしてもよい。また、耐摩耗絶縁シートが使用される環境によっては、充分な耐摩耗性を維持すると共に、耐熱性、耐水性を有する材料として、例えば、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリエーテルサルフォン（ＰＥＳ）、ポリエーテルイミド（ＰＥＩ）、ポリサルフオン（ＰＳＦ）、ポリアミド（ＰＡ）、ポリイミド（ＰＩ）、ポリアミドイミド（ＰＡＩ）、またはポリテトラフロロエチレン（ＰＴＦＥ）材などを用いることができる。このような摩耗層４に適した基材としては、樹木接触による地絡が発生した場合、延焼を防ぐことができる材料として、例えばポリエチレン系樹脂であって、かつ高い電気絶縁性および難燃性を有するものであってもよい。 Examples of the material for the wear layer 4 include polyethylene, chlorinated polyethylene, polyvinyl chloride, urethane, ethylene vinyl acetate copolymer, olefin elastomer, polyester elastomer, polyurethane elastomer, styrene elastomer, and butyl rubber. Alternatively, one type may be used. In addition, depending on the environment in which the wear-resistant insulation sheet is used, materials that maintain sufficient wear resistance, heat resistance, and water resistance may be used, such as polyetheretherketone (PEEK) or polyethersulfone (PES). ), polyetherimide (PEI), polysulfone (PSF), polyamide (PA), polyimide (PI), polyamideimide (PAI), polytetrafluoroethylene (PTFE), or the like can be used. A suitable base material for such a wear layer 4 is a material that can prevent the spread of fire in the event of a ground fault due to tree contact, such as polyethylene resin, which has high electrical insulation and flame retardant properties. It may also have the following.
摩耗検知層５の材料としては、電気絶縁性を有する高分子材料、例えば、ポリエチレン、塩素化ポリエチレン、ポリ塩化ビニル、ウレタン、エチレン酢酸ビニル共重合体、オレフィン系エラストマ、ポリエステル系エラストマ、ポリウレタン系エラストマ、スチレン系エラストマ、ブチルゴムのうちのいずれか１種を用いるようにしてもよい。 Materials for the wear detection layer 5 include polymeric materials having electrical insulation properties, such as polyethylene, chlorinated polyethylene, polyvinyl chloride, urethane, ethylene vinyl acetate copolymer, olefin elastomer, polyester elastomer, and polyurethane elastomer. , styrene elastomer, and butyl rubber may be used.
粘着層１３は、二色押出し成形によって一体成形された摩耗層４および摩耗検知層５から成る２層構造の耐摩耗絶縁シートを製造し、その耐摩耗絶縁シートの摩耗検知層表面１１および側面被覆部表面１２にロールコート法、印刷法などによって粘着剤を塗布することによって形成されてもよく、粘着テープを貼付けることによって形成されてもよい。粘着剤としては、例えば、ゴム系粘着剤、シリコーン系粘着剤、ウレタン系粘着剤などが挙げられる。 The adhesive layer 13 is produced by manufacturing a wear-resistant insulating sheet with a two-layer structure consisting of a wear layer 4 and a wear-sensing layer 5 that are integrally molded by two-color extrusion molding. It may be formed by applying an adhesive to the part surface 12 by a roll coating method, a printing method, etc., or it may be formed by pasting an adhesive tape. Examples of the adhesive include rubber adhesives, silicone adhesives, urethane adhesives, and the like.
また、粘着テープとしては、例えば、ブチルテープ、超高分子量ポリエチレンテープ、ビニールテープ、ポリエステルテープ、ポリエチレンテープ、塩素化ポリエチレンテープなどが挙げられる。粘着層１３の材料としては、長期にわたって耐候性、防水性、粘着性を担保させる点、ブチル系粘着剤であってもよい。 Examples of the adhesive tape include butyl tape, ultra-high molecular weight polyethylene tape, vinyl tape, polyester tape, polyethylene tape, and chlorinated polyethylene tape. The material for the adhesive layer 13 may be a butyl adhesive, since it ensures weather resistance, waterproofness, and adhesiveness over a long period of time.
図５は図３の切断面線Ｖ－Ｖから見た耐摩耗絶縁シート１の拡大断面図である。前述のように、摩耗層４と摩耗検知層５とを異なる色（黒色および黄色）とすることによって、摩耗層４が樹木の枝等との擦れ合いによって摩耗し、摩耗層４とは異なる色（黄色）の摩耗検知層５が露出したとき、摩耗が進行していることを作業者が電線Ｃの装着位置の下方の位置する地上の離れた場所から目視で、耐摩耗絶縁シートの黒地に黄色の摩耗箇所を明瞭に認識することができ、耐摩耗絶縁シート１の交換を要するものと正確に判断することができる。 FIG. 5 is an enlarged sectional view of the wear-resistant insulating sheet 1 taken along the section line VV in FIG. 3. As mentioned above, by making the abrasion layer 4 and the abrasion detection layer 5 different colors (black and yellow), the abrasion layer 4 is worn away by rubbing against tree branches, etc., and the abrasion detection layer 5 is colored differently from the abrasion layer 4. When the (yellow) wear detection layer 5 is exposed, an operator can visually check the progress of wear from a remote location on the ground below the installation position of the electric wire C by checking the black background of the wear-resistant insulation sheet. The yellow worn parts can be clearly recognized, and it can be accurately determined that the wear-resistant insulating sheet 1 needs to be replaced.
本実施形態によれば、電線Ｃに摩耗層４を外側にして耐摩耗絶縁シート１が装着された状態では、耐摩耗絶縁シート１の摩耗検知層５の第２色（黄色）が内側となり、少なくとも１つの縁辺部８の側面９も摩耗層４の側面被覆部１０によって被覆されているので、摩耗検知層５が外部に露出せず、地上からは実質上、第１色（黒色）の摩耗層４だけが視認される。これによって、日射などの光が摩耗層４によって反射している状態であっても、耐摩耗絶縁シート１が摩耗していると誤認することが防がれ、摩耗状態を確認するための無駄な手間および労力の発生を回避することができる。このような誤認による無駄な手間および労力の回避は、山間部および市街地などの広域の配電管区で電線の保全維持管理を行う上で、大きなコスト削減となり、実効性に優れた耐摩耗絶縁シート１を提供することができる。 According to this embodiment, when the wear-resistant insulation sheet 1 is attached to the electric wire C with the wear layer 4 on the outside, the second color (yellow) of the wear detection layer 5 of the wear-resistant insulation sheet 1 is on the inside, Since the side surface 9 of at least one edge portion 8 is also covered with the side surface coating portion 10 of the wear layer 4, the wear detection layer 5 is not exposed to the outside, and the wear of the first color (black) is substantially visible from the ground. Only layer 4 is visible. As a result, even when light such as sunlight is reflected by the abrasion layer 4, it is possible to prevent the wear-resistant insulation sheet 1 from being mistakenly recognized as being worn, and it is possible to prevent unnecessary efforts to confirm the wear state. The occurrence of time and effort can be avoided. Avoiding wasted time and effort due to such misidentification will result in significant cost reductions when maintaining and managing electric wires in wide-area power distribution areas such as mountainous areas and urban areas. can be provided.
また、側面被覆部１０は、摩耗検知層５の縁辺部８の側面９から該側面９に垂直な方向の幅Ｗが、側面被覆部１０の厚みＴの２倍以上、５倍以下に形成されるので、摩耗検知層５の縁辺部８の側面９は側面被覆部１０の側面１４から幅方向において内側に耐摩耗絶縁シート１が長期間にわたって電線Ｃに装着され、熱膨張または熱収縮による反りや浮きなどの変形によって、耐摩耗絶縁シート１と、その下地となる電線Ｃとの間、または耐摩耗絶縁シート１と、その下地となる耐摩耗絶縁シート１の重なり部２２との間に隙間が生じても、厚みＴの２倍以上、５倍以下の幅Ｗを有する側面被覆部１０によって、摩耗検知層５は外部からは見えず、作業者が耐摩耗絶縁シート１に摩耗が発生していると誤認することが防がれる。 Further, the side surface covering portion 10 is formed such that the width W in the direction from the side surface 9 of the edge portion 8 of the wear detection layer 5 in the direction perpendicular to the side surface 9 is greater than or equal to twice the thickness T of the side surface covering portion 10 and less than or equal to five times. Therefore, the wear-resistant insulating sheet 1 is attached to the wire C on the side surface 9 of the edge portion 8 of the wear detection layer 5 inwardly in the width direction from the side surface 14 of the side surface covering portion 10 for a long period of time, and warping due to thermal expansion or contraction occurs. Due to deformation such as lifting or lifting, a gap may be formed between the wear-resistant insulating sheet 1 and the underlying electric wire C, or between the wear-resistant insulating sheet 1 and the overlapping portion 22 of the underlying wear-resistant insulating sheet 1. Even if abrasion occurs, the wear detection layer 5 is not visible from the outside because of the side surface covering portion 10 having a width W that is at least twice the thickness T and no more than five times the thickness T. This prevents misidentification.
また、摩耗検知層表面１１および側面被覆部表面１２に粘着層１３が設けられるので、電線Ｃに耐摩耗絶縁シート１を巻き付けると、粘着層１３が電線Ｃの外表面または先行して電線Ｃに巻き付けられている耐摩耗絶縁シート１の外表面に粘着し、耐摩耗絶縁シート１が電線Ｃに保持され、耐摩耗絶縁シート１を容易かつ迅速に電線に取付けることができる。したがって、高所作業車のバケットなどに作業者が乗った状態で耐摩耗絶縁シート１を電線Ｃに取り付ける高所作業を行うに際して、作業者は煩雑な作業を行う必要がなく、高所で不安定なバケット上であっても、作業者は簡便に耐摩耗絶縁シート１を電線Ｃに取り付けることが可能となり、取付け性に優れた耐摩耗絶縁シートを提供することができる。 Further, since the adhesive layer 13 is provided on the wear detection layer surface 11 and the side surface covering part surface 12, when the wear-resistant insulation sheet 1 is wrapped around the electric wire C, the adhesive layer 13 is applied to the outer surface of the electric wire C or to the electric wire C in advance. It adheres to the outer surface of the wrapped abrasion-resistant insulating sheet 1, holds the abrasion-resistant insulating sheet 1 to the electric wire C, and allows the abrasion-resistant insulating sheet 1 to be easily and quickly attached to the electric wire. Therefore, when performing high-place work to attach the wear-resistant insulating sheet 1 to the electric wire C while the worker is riding on the bucket of a high-altitude work vehicle, the worker does not have to perform complicated work, and there is no need to carry out complicated work at high places. Even on a stable bucket, an operator can easily attach the wear-resistant insulating sheet 1 to the electric wires C, and it is possible to provide a wear-resistant insulating sheet with excellent attachability.
図６は耐摩耗絶縁シート１の他の使用例２を模式的に示す断面図である。なお、前述の実施形態と対応する部分には、同一の参照符を付す。前述の耐摩耗性絶縁シート１は、電線Ｃの軸線に垂直な断面において、互いに粘着して閉じられた両側部を下方に向けて、電線Ｃに上方から覆うように装着される。このように耐摩耗絶縁シート１を装着することによって、耐摩耗絶縁シート１の両側部が粘着層１３を構成している粘着剤の劣化によって粘着性が低下し、粘着層１３に微小な亀裂や剥離などの部分的な隙間が発生しても、その隙間は下方に臨んで開放している。これによって、降雨などによる水が隙間から内部に浸透して、粘着剤の粘着力低下が加速されてしまうことが防がれ、耐用期間が短縮されてしまうという不具合が生じない。 FIG. 6 is a sectional view schematically showing another usage example 2 of the wear-resistant insulating sheet 1. Note that the same reference numerals are given to parts corresponding to those in the above-described embodiment. The above-described wear-resistant insulating sheet 1 is attached to the electric wire C so as to cover it from above in a cross section perpendicular to the axis of the electric wire C, with both sides adhesively closed facing downward. By attaching the abrasion-resistant insulating sheet 1 in this way, the adhesiveness of the adhesive layer 13 on both sides of the abrasion-resistant insulating sheet 1 decreases due to deterioration, and minute cracks or Even if a partial gap occurs due to peeling, etc., the gap is open downward. This prevents water from rain or the like from penetrating into the interior through the gaps and accelerating the decline in adhesive strength of the adhesive, thereby avoiding the problem of shortening the service life.
また、耐摩耗絶縁シート１は、その長手方向に垂直な幅方向両側の各側面１４から粘着層１３が側面被覆層１０の側面１４から内側に距離ΔＷだけ退避し、側面被覆部表面１２の一部が露出しているので、図６のように耐摩耗絶縁シート１の両側部が対向するように電線Ｃに装着したとき、両側の側面被覆部表面１２の間の空間は下方に臨んで開放しているので、各側面被覆部表面１２の間の空間内に浸入した水および異物が固着して、側面被覆層１０の劣化および変形などが防がれる。側面被覆層１０が変形すると、付近の樹木の枝が風などによって接触したとき、変形した側面被覆層１０に枝が引っ掛かり、互いに粘着していた各側面被覆層１０を剥離し、耐摩耗絶縁シート１が電線Ｃから脱落し易くなる。本実施形態の耐摩耗絶縁シート１によれば、図６の使用形態において、電線Ｃから脱落しにくい耐摩耗絶縁シート１を提供することができる。 In addition, in the wear-resistant insulating sheet 1, the adhesive layer 13 is retracted from each side surface 14 on both sides in the width direction perpendicular to the longitudinal direction by a distance ΔW inward from the side surface 14 of the side surface coating layer 10, and a portion of the surface 12 of the side surface coating portion is Since the part is exposed, when the wear-resistant insulating sheet 1 is attached to the electric wire C so that both sides face each other as shown in FIG. Therefore, water and foreign matter that have entered the space between the surfaces 12 of the side surface covering portions are fixed, thereby preventing deterioration and deformation of the side surface covering layer 10. When the side surface coating layer 10 is deformed, when a branch of a nearby tree comes into contact with it due to wind or the like, the branch gets caught on the deformed side surface coating layer 10, peeling off each side surface coating layer 10 that had adhered to each other, and forming a wear-resistant insulating sheet. 1 becomes easy to fall off from the wire C. According to the wear-resistant insulating sheet 1 of this embodiment, it is possible to provide the wear-resistant insulating sheet 1 that does not easily fall off from the electric wires C in the usage pattern shown in FIG.
このような耐摩耗絶縁シート１の使用例においても、摩耗層４が樹木の枝等との擦れ合いによって摩耗し、摩耗層４とは異なる色（例えば、黄色）の摩耗検知層５が露出したとき、摩耗が進行していることを作業者が電線Ｃの装着位置の下方の位置する地上の離れた場所から目視で、耐摩耗絶縁シートの黒地に黄色の摩耗箇所を明瞭に認識することができ、耐摩耗絶縁シート１の交換の要否を正確に判断することができる。 Even in such usage examples of the abrasion-resistant insulating sheet 1, the abrasion layer 4 was worn away by rubbing against tree branches, etc., and the abrasion detection layer 5 of a different color (for example, yellow) from the abrasion layer 4 was exposed. When the wear is progressing, the worker can clearly recognize the yellow worn spots on the black background of the wear-resistant insulation sheet by visually observing from a remote location on the ground below the installation position of the electric wire C. Therefore, it is possible to accurately judge whether or not the wear-resistant insulating sheet 1 needs to be replaced.
図７は耐摩耗絶縁シート１の他の使用例３を模式的に示す斜視図である。なお、前述の実施形態と対応する部分には、同一の参照符を付す。本使用例では、電線Ｃの接続部に、大略的に薄手箱状の電線防護カバー２０が装着され、この電線防護カバー２０を覆うように耐摩耗絶縁シート１が巻掛けられて装着される。電線防護カバー２０は、例えばポリエチレンなどの絶縁性樹脂の射出成型物によって実現されてもよい。電線Ｃの接続部は、２本の電線Ｃの被覆層Ｃ２が剥離され、ほぼ一直線を成す軸線上で互いに対向する各芯線Ｃ１の端部同士が接続金具によって電気的および機械的に接続されている。耐摩耗絶縁シート１は、このような電線Ｃの接続部に装着された電線防護カバー２０に関して、電線Ｃが延びる方向に一方側から他方側にわたって巻回される。 FIG. 7 is a perspective view schematically showing another usage example 3 of the wear-resistant insulating sheet 1. Note that the same reference numerals are given to parts corresponding to those in the above-described embodiment. In this usage example, a roughly thin box-shaped wire protection cover 20 is attached to the connection portion of the wire C, and the wear-resistant insulating sheet 1 is wrapped and attached so as to cover this wire protection cover 20. The wire protection cover 20 may be realized by injection molding of an insulating resin such as polyethylene. The connecting portion of the electric wires C is made by peeling off the coating layer C2 of the two electric wires C, and electrically and mechanically connecting the ends of each core wire C1 facing each other on an axis that is substantially in a straight line with each other using a connecting fitting. There is. The wear-resistant insulating sheet 1 is wound around the wire protection cover 20 attached to the connecting portion of the wire C from one side to the other in the direction in which the wire C extends.
このように、電線Ｃおよびその接続部に装着された電線防護カバー２０が耐摩耗絶縁シート１で被覆されることによって、強風などによって電線防護カバー２０に強い風圧が作用しても、電線防護カバー２０が電線Ｃからずれてしまうこと、あるいは電線防護カバー２０が電線Ｃから脱落してしまうことが防がれ、電線Ｃの接続部を確実な電気的絶縁状態を維持することができる。 In this way, the wire protection cover 20 attached to the wire C and its connection part is covered with the abrasion-resistant insulation sheet 1, so that even if strong wind pressure is applied to the wire protection cover 20 due to strong winds, the wire protection cover 20 is prevented from shifting from the electric wire C, or the electric wire protective cover 20 is prevented from falling off from the electric wire C, and the connection portion of the electric wire C can be maintained in a reliable electrically insulated state.
このような耐摩耗絶縁シート１によって、摩耗層４が樹木の枝等との擦れ合いによって摩耗し、摩耗層４とは異なる色（例えば、黄色）の摩耗検知層５が露出したとき、摩耗が進行していることを作業者が電線Ｃの装着位置の下方の位置する地上の離れた場所から目視で、耐摩耗絶縁シートの黒地に黄色の摩耗箇所を明瞭に認識することができ、耐摩耗絶縁シートが交換を要するものと正確に判断することができる。 With such a wear-resistant insulating sheet 1, when the wear layer 4 is worn away by rubbing against tree branches, etc., and the wear detection layer 5 of a different color (for example, yellow) than the wear layer 4 is exposed, the wear is detected. The worker can clearly see the yellow wear spots on the black background of the abrasion-resistant insulation sheet by visually observing the progress from a remote location on the ground below the installation position of the electric wire C. It can be accurately determined that the insulation sheet requires replacement.
図８は耐摩耗絶縁シート１の他の使用例４を模式的に示す側面図である。なお、前述の実施形態と対応する部分には、同一の参照符を付す。本使用例では、電線Ｃの接続部に、大略的の円筒状の電線防護カバー２１が装着され、この電線防護カバー２１を覆うように耐摩耗絶縁シート１が装着される。電線防護カバー２１は、例えばポリエチレンなどの絶縁性樹脂の射出成型物によって実現されてもよい。電線Ｃの接続部においては、互いに接続される２本の電線Ｃの被覆層Ｃ２が剥離され、ほぼ一直線を成す軸線上で互いに対向する各芯線Ｃ１の各端部同士が、接続金具によって電気的および機械的に接続されている。 FIG. 8 is a side view schematically showing another usage example 4 of the wear-resistant insulating sheet 1. Note that the same reference numerals are given to parts corresponding to those in the above-described embodiment. In this usage example, a roughly cylindrical wire protection cover 21 is attached to the connection portion of the electric wire C, and the wear-resistant insulating sheet 1 is attached so as to cover this wire protection cover 21. The wire protection cover 21 may be realized by injection molding of an insulating resin such as polyethylene. At the connection part of the electric wires C, the coating layer C2 of the two electric wires C to be connected to each other is peeled off, and the ends of the core wires C1 facing each other on the axes forming a substantially straight line are connected electrically by the connecting fittings. and mechanically connected.
耐摩耗絶縁シート１は、前述の図６の使用例と同様に、電線防護カバー２１および電線防護カバー２１から延びる電線Ｃを上方から覆うように装着されている。このように耐摩耗絶縁シート１が装着された状態において、耐摩耗絶縁シート１の長手方向に垂直な断面は、該長手方向の両端部の間の中間部では、電線Ｃおよび電線防護カバー２１よりも下方に両側部が位置する、略Ｃ字状である。耐摩耗絶縁シート１の長手方向の両端部では、電線Ｃの軸線を含む鉛直な一平面に関して両側に一部する部分が、粘着層１３によって電線Ｃを挟んで密着し、閉塞され、降雨などによる水、埃などの異物の内部への浸入が阻止されている。 The wear-resistant insulating sheet 1 is attached so as to cover the electric wire protection cover 21 and the electric wires C extending from the electric wire protection cover 21 from above, as in the usage example shown in FIG. 6 described above. With the wear-resistant insulating sheet 1 installed in this manner, the cross section perpendicular to the longitudinal direction of the wear-resistant insulating sheet 1 is such that the middle part between both ends in the longitudinal direction is closer to the wire C and the wire protection cover 21. It is approximately C-shaped with both sides located at the bottom. At both ends of the wear-resistant insulating sheet 1 in the longitudinal direction, parts on both sides of a vertical plane including the axis of the electric wire C are tightly adhered to each other by the adhesive layer 13 with the electric wire C sandwiched therebetween, and are blocked by rain, etc. Foreign substances such as water and dust are prevented from entering the interior.
このような耐摩耗絶縁シート１の使用例においても、摩耗層４が樹木の枝等との擦れ合いによって摩耗し、摩耗層４とは異なる色（例えば、黄色）の摩耗検知層５が露出したとき、摩耗が進行していることを作業者が電線Ｃの装着位置の下方の位置する地上の離れた場所から目視で、耐摩耗絶縁シート１の摩耗検知層５の摩耗箇所を明瞭に認識することができ、耐摩耗絶縁シート１の交換の要否を容易かつ確実に判断することができる。 Even in such usage examples of the abrasion-resistant insulating sheet 1, the abrasion layer 4 was worn away by rubbing against tree branches, etc., and the abrasion detection layer 5 of a different color (for example, yellow) from the abrasion layer 4 was exposed. When the wear is progressing, the worker can clearly recognize the worn parts of the wear detection layer 5 of the wear-resistant insulation sheet 1 by visually observing from a remote location on the ground below the mounting position of the electric wire C. Therefore, it is possible to easily and reliably judge whether or not the wear-resistant insulating sheet 1 needs to be replaced.
前述の実施形態では、摩耗検知層５は一層の樹脂層によって構成される例について述べたが、他の実施形態では、色の異なる複数の樹脂層によって摩耗検知層５が構成されてもよい。この場合、摩耗検知層５を構成する色の異なる複数の樹脂層としては、色差があればよく、例えば外側に位置する外層を黄色とし、内側に位置する内層を赤色とすることによって、摩耗状態をその程度に応じて段階的に表示することができる。一例としては、外層の黄色が露出していれば、耐摩耗絶縁シート１を例えば１箇月以内に交換を要し、赤色が露出していれば、例えば１週間以内に交換を要するもとしてもよい。これによって、交換を要する耐摩耗絶縁シートの枚数および交換作業日などの計画を立てることができ、作業の円滑化および効率化を図ることができる。 In the embodiments described above, the wear detection layer 5 is composed of one resin layer, but in other embodiments, the wear detection layer 5 may be composed of a plurality of resin layers of different colors. In this case, the plurality of resin layers of different colors constituting the wear detection layer 5 only need to have a color difference. For example, by making the outer layer located on the outside yellow and the inner layer located on the inside red, it is possible to determine the wear state. can be displayed in stages depending on the degree. For example, if the yellow color of the outer layer is exposed, the wear-resistant insulating sheet 1 may need to be replaced within, for example, one month, and if the red color is exposed, the wear-resistant insulation sheet 1 may need to be replaced, for example, within one week. . This makes it possible to plan the number of wear-resistant insulating sheets that need to be replaced and the date of the replacement work, thereby making the work smoother and more efficient.
以上、本発明の実施形態について詳細に説明したが、本発明は上述の実施の形態に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、種々の変更、改良等が可能である。上記各実施形態をそれぞれ構成する全部または一部を、適宜、矛盾しない範囲で組み合わせ可能であることは、言うまでもない。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various changes and improvements can be made without departing from the gist of the present invention. be. It goes without saying that all or part of the above embodiments can be combined as appropriate to the extent that they do not contradict each other.
１ 耐摩耗絶縁シート
３ 樹木
４ 摩耗層
５ 摩耗検知層
８ 縁辺部
９ 側面
１０ 側面被覆部
１１ 摩耗検知層表面
１２ 側面被覆部表面
１３ 粘着層
１４ 側面
Ｃ 電線
Ｃ１ 芯線
Ｃ２ 被覆層
1 Wear-resistant insulation sheet 3 Tree 4 Wear layer 5 Wear detection layer 8 Edge portion 9 Side surface 10 Side surface covering portion 11 Wear detection layer surface 12 Side surface covering portion surface 13 Adhesive layer 14 Side surface C Electric wire C1 Core wire C2 Covering layer
Claims (2)
電気絶縁性を有する、前記第１色とは異なる第２色の合成樹脂から成り、前記摩耗層に積層される可撓性の摩耗検知層と、を含み、前記摩耗層を外側にして電線に装着される矩形の耐摩耗絶縁シートであって、
前記摩耗層は、
前記摩耗検知層に重なる積層部と、
前記摩耗検知層の周縁部の少なくとも１つの縁辺部の側面を被覆する側面被覆部と、を有し、
前記側面被覆部は、前記摩耗検知層の、該側面被覆部が設けられた前記縁辺部の側面から垂直な方向に、前記側面被覆部の厚みＴの２倍以上、５倍以下の幅Ｗを有していることを特徴とする耐摩耗絶縁シート。 a flexible wear layer made of a synthetic resin of a predetermined first color and having electrical insulation properties;
a flexible wear detection layer made of a synthetic resin of a second color different from the first color and having electrical insulation properties, and laminated on the wear layer, and attached to the electric wire with the wear layer on the outside. A rectangular wear-resistant insulation sheet to be attached,
The wear layer is
a laminated portion overlapping the wear detection layer;
a side covering portion that covers a side surface of at least one edge portion of the peripheral edge portion of the wear detection layer ;
The side surface covering portion has a width W of at least twice and no more than 5 times the thickness T of the side surface covering portion in a direction perpendicular to the side surface of the edge portion of the wear detection layer on which the side surface covering portion is provided. A wear-resistant insulating sheet characterized by :
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Citations (2)
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| JP2009297978A (en) | 2008-06-12 | 2009-12-24 | Yondenko Corp | Protective sheet |
| JP2016048645A (en) | 2014-08-28 | 2016-04-07 | 矢崎総業株式会社 | Sheet for wire harness |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009297978A (en) | 2008-06-12 | 2009-12-24 | Yondenko Corp | Protective sheet |
| JP2016048645A (en) | 2014-08-28 | 2016-04-07 | 矢崎総業株式会社 | Sheet for wire harness |
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