JP4981982B2 - Protective tube for cables, etc. - Google Patents
Protective tube for cables, etc. Download PDFInfo
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- JP4981982B2 JP4981982B2 JP2011180444A JP2011180444A JP4981982B2 JP 4981982 B2 JP4981982 B2 JP 4981982B2 JP 2011180444 A JP2011180444 A JP 2011180444A JP 2011180444 A JP2011180444 A JP 2011180444A JP 4981982 B2 JP4981982 B2 JP 4981982B2
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- 230000001681 protective effect Effects 0.000 title description 18
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003063 flame retardant Substances 0.000 claims description 6
- 229920005672 polyolefin resin Polymers 0.000 claims description 6
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 239000011342 resin composition Substances 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 11
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001615 p wave Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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Description
本発明は一般的には通信ケーブルや電気配線（以下「ケーブル等」と言う。）の保護管に関するものであり、さらに具体的には、フレキシブル性がないかあるいはフレキシブル性に乏しい（例えば、通常人の腕力のみでは容易に曲げることができない程度）ケーブル等保護管に関するものである。 The present invention generally relates to protective tubes for communication cables and electrical wiring (hereinafter referred to as “cables”), and more specifically, is not flexible or poorly flexible (for example, usually This is related to a protective tube such as a cable).
また本発明は、工場、倉庫、屋内駐車場、各種地下構造物その他の構造物の内部や外壁及び屋上等において、埋設配管（床スラブ、壁、柱、梁などの鉄筋コンクリート内へ埋設される配管）を除く次のような配管構造に用いられるケーブル等保護管に関するものである。
露出配管：壁面や天井面その他構造物のない外面において露出状態で設置される配管。
隠蔽配管：二重天井内、軽量間仕切（中空間仕切）内、パイプシャフト内その他隠蔽された状態で設置される配管。
In addition, the present invention relates to a buried pipe (a pipe buried in a reinforced concrete such as a floor slab, a wall, a column, a beam, etc., in a factory, a warehouse, an indoor parking lot, various underground structures and other structures, an outer wall, and a rooftop. This is related to protective pipes such as cables that are used in the following piping structures.
Exposed piping: Piping installed in an exposed state on the outside surface without walls or ceiling or other structures.
Concealment piping: Piping installed in a concealed state in a double ceiling, in a lightweight partition (medium space partition), in a pipe shaft, etc.
この種のケーブル等保護管の配管構造では、例えば地中に埋設されるケーブル保護管等の場合と比較して、配管領域に曲げ配管部（配管現場の客観的条件や配管上の都合により曲げ配管が必要な部分）がはるかに多い。
このような場合、一般的には熱可塑性合成樹脂製のフレキシブル波付管を用い、直線配管部ではフレキシブル波付管を直線状に伸ばした状態で（フレキシブル波付管は、押出し形成後コイル状に巻かれて出荷されるので、延ばして使用する。）壁面や床面へ止め金具により固定し、曲げ配管部ではこれを曲げた状態で止め金具により固定する。
In this type of cable protection pipe piping structure, for example, compared to the case of cable protection pipes buried in the ground, the piping area is bent (due to objective conditions at the piping site and the convenience of piping). There are far more parts that need piping).
In such a case, a flexible corrugated pipe made of a thermoplastic synthetic resin is generally used, and in a straight pipe section, the flexible corrugated pipe is straightened (the flexible corrugated pipe is coiled after being formed by extrusion). It is rolled and used before being extended.) Fasten it to the wall or floor with fasteners, and bend it in the bent piping section with fasteners.
しかし、直線配線部が所定量以上長いとフレキシブル波付管の巻きぐせが残ってＳ字状やくの字状等に曲り、その曲がった部分へフレキシブルなケーブルを通線する際に摩擦によりケーブル保護管が動き、通線抵抗の増大に伴い通線に時間がかかる。直線配管部の距離が長いなどの事情がある場合、フレキシブル波付管を壁面や床面へ止める際に止め金具を密に設置すると曲り癖の残存部分は少なくなるが、止め金具の使用数が多くなるので配管費用が増大し、外観も悪くなる。
このような理由から、発明者らが既に提案したように（特願２００７−０１１５９５号）、直線配管部では直線状の非フレキシブル性の（フレキシブル性を有しないか、あるいはフレキシブル性の乏しい性質）保護管を必要長さに切断して配管するとともに、曲げ配管部ではフレキシブル保護管を切断して配管し、前記非フレキシブル保護管とフレキシブル保護管相互の端部を連結する配管構造であるのが好ましい。
However, if the straight wiring part is longer than a predetermined amount, the flexible corrugated tube will remain and bend into an S-shape or a round shape, and the cable will be protected by friction when the flexible cable is passed through the bent portion. As the pipe moves and the line resistance increases, the line takes time. If there are circumstances such as the distance of the straight piping section is long, if the clasps are densely installed when the flexible corrugated pipe is fastened to the wall or floor surface, the remaining part of the curl will be reduced, but the number of clasps used will be reduced. This increases the cost of piping and deteriorates the appearance.
For these reasons, as the inventors have already proposed (Japanese Patent Application No. 2007-011595), the straight piping portion is not linearly flexible (having no flexibility or poor flexibility). The protective pipe is cut to the required length for piping, and in the bent pipe section, the flexible protective pipe is cut and piped, and the non-flexible protective pipe and the flexible protective pipe are connected to each other. preferable.
フレキシブル保護管と非フレキシブル保護管とを前記のように混在させて配管する場合、非フレキシブル保護管として、例えば鋼管その他の金属管などを用いるのは、配管現場で切断する際に丸鋸カッタを使用するので切断作業に時間が掛かるほか、衝撃に対して変形し易いという問題がある。
また、非フレキシブル保護管として例えば硬質の塩化ビニル管を用いるのは、切断の際に丸鋸カッタが必要で切断に手間取るほか、接続には接着剤が使用され接着完了を待って管を固定するので手間が掛かるという問題があった。
When piping with flexible protective tubes and non-flexible protective tubes mixed as described above, for example, steel pipes or other metal tubes are used as non-flexible protective tubes. Since it is used, the cutting work takes time and there is a problem that it is easily deformed by impact.
In addition, using a rigid polyvinyl chloride tube as a non-flexible protective tube requires a circular saw cutter when cutting, and it takes time to cut. In addition, an adhesive is used for connection, and the tube is fixed after completion of bonding. There was a problem that it took time and effort.
本発明の課題は、フレキシブル保護管と混在させて配管する非フレキシブル管の改善にある。
本発明の目的は、耐衝撃性に優れており、しかもフレキシブル保護管と混在させて配管する場合により作業性よく配管することができる非フレキシブル性のケーブル保護管を提供することにある。
本発明の他の目的は、配管後ケーブル等を通線する場合により通線作業性の良いケーブル保護管を提供することにある。
An object of the present invention is to improve a non-flexible pipe that is mixed with a flexible protective pipe.
An object of the present invention is to provide a non-flexible cable protection tube that has excellent impact resistance and can be piped with good workability when it is mixed with a flexible protection tube.
Another object of the present invention is to provide a cable protective tube with good wiring workability when passing through cables and the like after piping.
本発明に係るケーブル保護管は、前記課題を解決するため、ポリオレフィン系樹脂を主成分とし、これに難燃剤を加えた樹脂組成物からなり、外周に谷部と当該谷部よりも幅が広い山部とが交互に形成された内径１４．３４〜３５．７２ｍｍ，外径２２．８３〜４５．３０ｍｍの波付管であり、谷部中心における管の内径が山部中心における管の内径よりも小さく管の内側に向けて僅かに円弧状に盛り上っており且つ中実の山部内径が谷部外径より小さく形成され、谷部の平均肉厚が１．４０ｍｍ以上２．０６ｍｍ以下であって山部の平均肉厚が３．３ｍｍ以上３．７６ｍｍ以下で、山部の平均肉厚が谷部平均肉厚より厚く、さらに山部の幅が谷部の幅の少なくとも１．６４倍以上で、曲げ剛性が２．５０Ｎ・ｍ２以上５．００Ｎ・ｍ２以下であり、
管を１０％圧縮するときの圧縮荷重を１２５０Ｎ以上とした場合のＪＩＳ Ｃ ８４１１ に基づく圧縮荷重試験の圧縮減少率が１０％以下であり、耐圧縮性と圧縮復元性と通線性とに優れ、非フレキシブル性を有する単層で直線状であることを最も主要な特徴としている。
Cable protection tube according to the present invention, for solving the problems, positive re olefin resin as a main component, to which a resin composition obtained by adding a flame retardant, width than the valleys and the valleys on the outer periphery There wide Iyama portion and has an inner diameter formed alternately 14.34～35.72Mm, a corrugated tube having an outer diameter 22.83～45.30Mm, tubes in inner diameter crest center of the tube in the valley center inner diameter crest inner diameter in one且and up servings slightly arc shape toward the inside of the small tube fruit is smaller than the valley outer diameter than, the average thickness of the valley than 1.40mm 2.06 mm or less , the average thickness of the peak is 3.3 mm or more and 3.76 mm or less , the average thickness of the peak is thicker than the average thickness of the valley, and the width of the peak is the width of the valley at least 1.64 times or more, the bending rigidity is 2.50N · m 2 or more 5.00N · m 2 or more It is in,
Ri der compression reduction rate less than 10% of the compressive load test the compressive load based on JIS C 8411 in the case of the above 1250N when compressing the tube by 10%, excellent in compression resistance and compression recovery properties and wire-passing property The most important feature is that it is a single layer with non-flexibility and is linear .
本発明に係るケーブル保護管によれば、第１に、外周に谷部と当該谷部よりも幅が広く中実の山部とが交互に形成された波付管であり、曲げ剛性が２．５０Ｎ・ｍ ２ 以上５．００Ｎ・ｍ ２ 以下であるので、非フレキシブル性（フレキシブル性を有しないか、通常人の腕力のみでは曲がらない程度にフレキシブル性に乏しい。）を有する。また、鋼管等と比較しても耐衝撃性に優れている。
第２に、難燃性を有するポリオレフィン系樹脂を主成分としているので難燃性（炎がなくなると一定時間内に自然消火する性質。）を有する。
第３に、谷部中心における管の内径が山部中心における管の内径よりも小さく管の内側に向けて僅かに円弧状に盛り上っているので、管内面の滑りがよく通線性に富んでいる。
第４に、前記のような波付管であるので、同様な形態及びサイズのフレキシブル波付管と併用することにより、それらの波付管用の継手具を用いてフレキシブル波付管に対して簡単に連結することができる。
また、押出し成形によって製造することにより直線性を有する。
According to the cable protection tube of the present invention, first, it is a corrugated tube in which a trough and a solid crest having a width wider than that of the trough are alternately formed on the outer periphery, and the bending rigidity is 2 Since it is not less than .50 N · m 2 and not more than 5.00 N · m 2 , it has non-flexibility (not flexible, or is not flexible enough to bend only by human arm strength). Moreover, it is excellent in impact resistance compared with steel pipes and the like.
Secondly, since the main component is a flame retardant polyolefin-based resin, it has flame retardancy (property to naturally extinguish within a certain time when the flame disappears).
Thirdly, since the inner diameter of the tube at the center of the valley is smaller than the inner diameter of the tube at the center of the peak and slightly bulges toward the inside of the tube, the inner surface of the tube is slippery and has excellent lineability. It is out.
Fourthly, since it is a corrugated tube as described above, it can be easily used for a flexible corrugated tube by using the same corrugated tube having the same form and size. Can be linked to.
Moreover, it has linearity by manufacturing by extrusion molding.
図１は本発明に係るケーブル保護管の一実施形態を示す部分断面図である。
ケーブル保護管１は、難燃性を有するポリオレフィン系樹脂を主成分とし、外周に谷部１１と当該谷部１１の幅ｗ１よりも幅ｗが広く中実（むく）の山部１０とが交互に形成された波付管であって、曲げ剛性は２．５０Ｎ・ｍ ２ 以上５．００Ｎ・ｍ ２ 以下である。
谷部１１の中心における管１の内径は山部１０の中心における管１の内径よりも管１の内側に向けて僅かに円弧状に盛り上っている。
FIG. 1 is a partial sectional view showing an embodiment of a cable protection tube according to the present invention.
The cable protective tube 1 is mainly composed of a flame-retardant polyolefin-based resin, and the outer periphery is alternately formed with
The inner diameter of the tube 1 at the center of the
この実施形態において、ケーブル保護管１は、高密度ポリエチレンやＥＶＡ樹脂に適量の難燃剤（例えばハロゲン化物）を加えた樹脂を用い、ＪＩＳ Ｃ ８４１１ フレキシブル波付管用の金型により押出成形したものであるが、他のポリオレフィン系樹脂をベースとして用いることができる。
また、圧縮荷重を１２５０Ｎ以上（ＪＩＳ Ｃ ８４３０ の塩化ビニル管対応）とした場合のＪＩＳ Ｃ ８４１１に基づく圧縮荷重試験の圧縮減少率が１０％以下であるのが好ましい。
In this embodiment, the cable protection tube 1 is formed by extrusion molding with a mold for JIS C 8411 flexible corrugated tube using a resin obtained by adding an appropriate amount of a flame retardant (for example, a halide) to high-density polyethylene or EVA resin. However, other polyolefin resins can be used as a base.
Moreover, it is preferable that the compression reduction rate of the compression load test based on JIS C 8411 when the compression load is 1250 N or more (corresponding to the vinyl chloride pipe of JIS C 8430) is 10% or less.
前記実施形態のケーブル保護管１によれば、外周に谷部１１と当該谷部１１の幅ｗ１よりも幅ｗが広く中実の山部１０とが交互に形成された波付管であり、曲げ剛性が２．５０Ｎ・ｍ ２ 以上５．００Ｎ・ｍ ２ 以下であるので、前述のような非フレキシブル性を有するほか、耐衝撃性に優れている。
難燃性を有するポリオレフィン系樹脂を主成分としているので難燃性を有する。
谷部１１の中心における管１の内径が山部１０の中心における管１の内径よりも小さく管１の内側に向けて僅かに円弧状に盛り上っているので、管内面の滑りがよく配管後の通線性に富んでいる。
また、前記のような波付管であるので、同様な形態及びサイズのフレキシブル波付管と併用することにより、それらの波付管用の継手具を用いてフレキシブル波付管に対して簡単に連結することができる。
さらに、押出し成形によって製造されているので直線性を有する。
According to the cable protection tube 1 of the embodiment, a corrugated tube in which a
Since the main component is a polyolefin resin having flame retardancy, it has flame retardancy.
Since the inner diameter of the tube 1 at the center of the
Moreover, since it is a corrugated pipe as described above, it can be easily connected to a flexible corrugated pipe using a fitting for the corrugated pipe by using it together with a flexible corrugated pipe of the same form and size. can do.
Furthermore, since it is manufactured by extrusion molding, it has linearity.
前記実施形態のケーブル保護管は、曲げ剛性を２．５０〜５．００Ｎ・ｍ ２ の範囲とすることにより、一般的な曲げ工具を用いてある程度曲げ加工することができる。また、例えば一端を接続ボックスへ接続したケーブル保護管をサドル等の止め具を用いて壁や天井へ固定する際に、壁面や天井面における接続ボックスのレベルと前記止め具の固定レベルとの差を利用して、当該保護管を固定すると同時に当該保護管へ若干の曲げを付与することができる。
さらに、ポリエチレン樹脂にＥＶＡ樹脂をブレンドしたり、あるいはベース樹脂に合成ゴムを添加するなどの手段により、低温下においても曲げ工具や機器による若干の曲げ加工性を保護管に付与することができる。
このように、前記実施形態のケーブル保護管へ若干の曲げ加工性を付与することにより、配管領域へある程度曲げ工具等により曲げた状態で配管することが可能となる。
The cable protection tube of the above embodiment can be bent to some extent using a general bending tool by setting the bending rigidity in the range of 2.50 to 5.00 N · m 2 . In addition, for example, when fixing a cable protection tube having one end connected to a connection box to a wall or ceiling using a saddle or the like, a difference between the level of the connection box on the wall surface or the ceiling surface and the fixing level of the stopper. Using this, it is possible to fix the protective tube and at the same time bend the protective tube slightly.
Furthermore, a slight bending workability by a bending tool or equipment can be imparted to the protective tube even at a low temperature by means of blending EVA resin with polyethylene resin or adding synthetic rubber to the base resin.
Thus, by giving a slight bending workability to the cable protection tube of the embodiment, it is possible to perform piping in a state bent to some extent by a bending tool or the like to the piping region.
実施例
高密度ポリエチレンをベースとして難燃剤を添加した樹脂を用い、表１で示すように ＪＩＳ Ｃ ８４１１による各呼び径φ１６（金型Ｎｏ．１），φ２２（金型Ｎｏ．２），φ２８（金型Ｎｏ．３），φ３６(金型Ｎｏ．４)のフレキシブル保護管（波付管）成形用の金型により、各実施例のケーブル保護管サンプルを押出成形により試作した。
表１の表示中、内径，外径，波ピッチｐ，谷部肉厚ｔ１及び山部肉厚ｔはそれぞれ平均値である。また、内径は谷部１１の中心部における管１の内径（最小内径部）であり、外径は山部１０の中心における管１の外径である。また、「標準目付」は管１のｍ当たりの樹脂の重量である。
各実施例について、それぞれ曲げ剛性を測定するとともに、各実施例サンプルにつきそれぞれ記載した圧縮荷重を付与し、ＪＩＳ Ｃ ８４１１に準じて圧縮減少率を測定し、それらを表１に記載した。
Example As shown in Table 1, each of the nominal diameters φ16 (die No. 1), φ22 (die No. 2), φ28 (according to JIS C 8411) was used, using a resin with a flame retardant added based on high-density polyethylene. Samples of the cable protection tube of each example were manufactured by extrusion molding using a mold for molding a flexible protection tube (corrugated tube) of φ No. 3) and φ36 (die No. 4).
During the display of Table 1, the inner diameter, outer diameter, wave pitch p, valley thickness t1, and peak thickness t are average values. The inner diameter is the inner diameter (minimum inner diameter portion) of the tube 1 at the center of the
About each Example, while each bending rigidity was measured, the compression load described about each Example sample was provided, the compression reduction rate was measured according to JIS C8411, and they were described in Table 1.
表１で示されているように、各実施例のケーブル保護管サンプルは、ＪＩＳ Ｃ ８４３０ による硬質塩化ビニル管対応に相当するか又はそれ以上の圧縮減少率を示した。 As shown in Table 1, the cable protection tube sample of each example exhibited a compression reduction rate corresponding to or exceeding that of a rigid vinyl chloride tube according to JIS C 8430.
表１
耐衝撃性試験
表１のＪＩＳ Ｃ ８４１１による呼び径φ２２（金型Ｎｏ．２）フレキシブル波付管成形用の金型を用いて押出成形した実施例試験片Ｎｏ．１〜１０、及び内径２５ｍｍ，肉厚１ｍｍの鋼管による比較例試験片Ｎｏ．１〜１０それぞれについて、以下の要領で耐衝撃試験を行い、それらの結果を表２と表３に示した。
試験要領
ＪＩＳ Ｃ ８４１１：１９９９ ８．３耐衝撃試験にて用いる装置のハンマ質量を１９．６Ｎから１１７．６Ｎに変更。
管に荷重を加える当て金をＲ３００からＲ１５〜１８に変更。
各試験片の外径を測定。
１００ｍｍの高さから各試験片へ衝撃を加える（衝撃の加え方は、ＪＩＳ Ｃ ８４１１：１９９９ ８．３耐衝撃試験と同様）。
約３０分後再度各試験片の外径を測定した。（比較例試験片は鋼管凹のため、ノギスに突起をつけて外径を測定した。）
Impact resistance test Nominal diameter φ22 (die No. 2) according to JIS C 8411 in Table 1 Example test piece No. 2 was extruded using a die for flexible corrugated tube forming. 1 to 10 and a comparative example test piece No. 1 made of a steel pipe having an inner diameter of 25 mm and a wall thickness of 1 mm. Each of 1 to 10 was subjected to an impact resistance test in the following manner, and the results are shown in Tables 2 and 3.
Test procedure JIS C 8411: 1999 8.3 The hammer mass of the equipment used in the impact resistance test was changed from 19.6N to 117.6N.
The metal pad for applying load to the tube was changed from R300 to R15-18.
Measure the outer diameter of each specimen.
An impact is applied to each test piece from a height of 100 mm (how to apply the impact is the same as in JIS C 8411: 1999 8.3 impact resistance test).
About 30 minutes later, the outer diameter of each test piece was measured again. (Since the comparative test piece was a steel pipe recess, the outer diameter was measured by attaching a protrusion to the caliper.)
表２
表３
表２，表３で示されているように、比較例の試験片サンプルの３０分後減少率が平均７．９６であるのに対し、実施例の試験片サンプルの３０分後減少率は平均６．５４であって、比較例サンプルに対する実施例サンプルの優位性を確認することができた。 As shown in Tables 2 and 3, the decrease rate after 30 minutes of the test piece sample of the comparative example is an average of 7.96, whereas the decrease rate after 30 minutes of the test piece sample of the example is an average. It was 6.54, and the superiority of the example sample over the comparative example sample could be confirmed.
１ ケーブル保護管
１０ 山部
１１ 谷部
ｔ 山部肉厚
ｔ１ 谷部肉厚
ｗ 山部幅
ｗ１ 谷部幅
ｐ 波ピッチ
1
Claims (1)
管を１０％圧縮するときの圧縮荷重を１２５０Ｎ以上とした場合のＪＩＳ Ｃ ８４１１ に基づく圧縮荷重試験の圧縮減少率が１０％以下であり、耐圧縮性と圧縮復元性と通線性とに優れ、非フレキシブル性を有する単層で直線状であるケーブル等保護管。 Po Li olefin resin as a main component, to which a resin composition obtained by adding a flame retardant, an inside diameter width than the valleys and the valleys on the outer circumference and a wide Iyama portion are formed alternately 14.34 -35.72 mm, outer diameter 22.83-45.30 mm corrugated tube, the inner diameter of the tube at the center of the valley is smaller than the inner diameter of the tube at the center of the peak, and slightly arcuate toward the inside of the tube crest inner diameter in one且have up prime fruit is smaller than the valley outer diameter and the average thickness of the crest equal to or less than 2.06mm average thickness is more than 1.40mm valleys is 3. 3 mm or more and 3.76 mm or less , the average thickness of the peak is thicker than the average thickness of the valley, and the width of the peak is at least 1.64 times the width of the valley, and the flexural rigidity is 2.50 N · m. 2 or more and 5.00 N · m 2 or less,
Ri der compression reduction rate less than 10% of the compressive load test the compressive load based on JIS C 8411 in the case of the above 1250N when compressing the tube by 10%, excellent in compression resistance and compression recovery properties and wire-passing property A non-flexible single-layer, straight cable protection tube.
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| JP2011180444A JP4981982B2 (en) | 2011-08-22 | 2011-08-22 | Protective tube for cables, etc. |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4620230B1 (en) * | 1967-03-31 | 1971-06-07 | ||
| DE19707518C1 (en) * | 1997-02-25 | 1998-06-10 | Inventa Ag | Thermoplastic polymeric corrugated pipe for liquid |
| JP2001311484A (en) * | 2000-04-28 | 2001-11-09 | Fujikura Ltd | Flame-retardant flexible tube for electric wire |
| JP4516680B2 (en) * | 2000-09-28 | 2010-08-04 | 株式会社パイオラックス | Corrugated tube |
| JP3923350B2 (en) * | 2001-04-02 | 2007-05-30 | 古河電気工業株式会社 | Manufacturing method of corrugated conduit |
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