JP2001221371A - Support net for polyethylene sleeve construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a support net for a polyethylene sleeve construction method, to be wound on the outer periphery of a joint part even on the construction site. SOLUTION: This support net for a polyethylene sleeve construction method is composed of a plurality of circumferential clamping members 7a, 7b and 7a to be wound on and fixed to the outer surfaces of pipe joint parts 2 coated with polyethylene sleeves 1, and a plurality of axial support members 8...8 intersecting the clamping members 7a, 7b and 7a and arranged along the lower half bottom parts of the joint parts 2. A plurality of circumferential clamping members 7a, 7b and 7a are made of synthetic resin having elasticity, the axial support members 8...8 are made of hard synthetic resin, and locking parts 10 for detachably fixing the circumferential clamping members are provided on the axial support members 8...8.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この発明は、ポリエチレンス
リーブ工法用支持ネットに関する。The present invention relates to a support net for a polyethylene sleeve method.

【０００２】[0002]

【従来の技術】従来、鋳鉄管など金属管を地中埋設する
場合、腐食性土壌との接触や地下水等よりの影響を無く
し腐蝕や電食を防止することを目的として、管路をポリ
エチレンスリーブで被覆した上で埋設する、いわゆるポ
リエチレンスリーブ工法が知られている。2. Description of the Related Art Conventionally, when a metal pipe such as a cast iron pipe is buried underground, a pipe is made of a polyethylene sleeve for the purpose of eliminating contact with corrosive soil and the influence of groundwater to prevent corrosion and electrolytic corrosion. There is known a so-called polyethylene sleeve construction method in which the cover is buried after covering.

【０００３】ところで、管路の管継手部は受口部分で外
径が拡径しているため、ポリエチレンスリーブは管継手
部をカバーし得る径の大きいものとされることが多い。
このような径の大きいポリエチレンスリーブで継手部を
被覆した場合、管外周でだぶついたポリエチレンスリー
ブは、通常、周方向に折畳み、ゴムバンドなどの緊締部
材で巻き締め固定して管外周にまとめることが行なわれ
ていた。[0003] Incidentally, since the outer diameter of the pipe joint portion of the pipe is increased at the receiving portion, the polyethylene sleeve is often made to have a large diameter capable of covering the pipe joint portion.
When the joint portion is covered with such a large-diameter polyethylene sleeve, the polyethylene sleeve that has become loose on the outer periphery of the pipe is usually folded in the circumferential direction, and is fixed by winding it around with a tightening member such as a rubber band to collect the outer circumference of the pipe. Was being done.

【０００４】しかし、何らかの事情でポリエチレンスリ
ーブ内に地下水が侵入すると、管路より低くなっている
継手下底部に流れ込み、やがて集積滞留して、継手部下
方側に空間があると、ポリエチレンスリーブが水の重量
で垂れ下がり、前記折畳み部が次第に緩んで垂れ下がっ
てさらに地下水が集中し、継手部の腐蝕原因となる恐れ
があった。[0004] However, if groundwater enters the polyethylene sleeve for some reason, it flows into the lower part of the joint, which is lower than the pipe, and accumulates and accumulates. There is a risk that the folded portion gradually loosens and hangs down, and further groundwater concentrates, causing corrosion of the joint portion.

【０００５】このような問題を解消し、例え地下水が侵
入することがあっても、地下水重量によるポリエチレン
スリーブの垂れ下がりを防止するため、図４、図５に示
すように、緊締バンド３ａ、３ａで斜線部を緊締したポ
リエチレンスリーブ１にオーバラップするように継手部
２にポリエチレンスリーブ１を被覆し、周方向に折畳ん
だ後、外周に周方向緊締部材３と軸方向支持部材４から
なる支持ネットを当てがって周方向緊締部材３をバック
ル５で緊締し、これによってポリエチレンスリーブ１が
垂れ下がらないように支持することが行なわれる。[0005] In order to solve such a problem and prevent the polyethylene sleeve from hanging down due to the weight of the groundwater even if the groundwater enters, as shown in FIGS. 4 and 5, the tightening bands 3a and 3a are used. The joint portion 2 is covered with the polyethylene sleeve 1 so as to overlap the hatched portion of the polyethylene sleeve 1, and after being folded in the circumferential direction, a support net comprising a circumferential tightening member 3 and an axial support member 4 on the outer periphery. , The circumferential tightening member 3 is tightened by the buckle 5, thereby supporting the polyethylene sleeve 1 so as not to hang down.

【０００６】[0006]

【発明が解決しようとする課題】ところで、上記ネット
は従来、柔軟なゴム製素材よりなる周方向緊締部材３と
軸方向支持部材４の交叉部６…６を締結して網状に結止
するか、あるいは型によって縦横部材を一体化したもの
を成形するかのいずれかによっていたが、前者のものは
周方向緊締部材３と軸方向支持部材４のいずれもが容易
に屈曲変形するので縦横の両部材３、４を結止する作業
が迅速に出来ず、作業の手間がかかる欠点があった。By the way, conventionally, the above-mentioned net is fastened to the cross-sections 6... 6 of the circumferential tightening member 3 made of a soft rubber material and the axial supporting member 4 to form a net. , Or by molding a member in which vertical and horizontal members are integrated by a mold. In the former, both the circumferential tightening member 3 and the axial supporting member 4 are easily bent and deformed. There was a disadvantage that the work of fastening the members 3 and 4 could not be performed quickly, and the work was troublesome.

【０００７】後者の一体成形によるものは、ネットの成
形用型を用意しなければならないので製造コストがかか
るといった欠点があった。この発明は上記問題を解消
し、施工現場でも簡単に成形でき安価に実施できるポリ
エチレンスリーブ工法用支持ネットを提供することを課
題としてなされたものである。[0007] The latter, which is formed by integral molding, has a drawback in that it requires a mold for molding the net, which increases the production cost. An object of the present invention is to solve the above-mentioned problems and to provide a support net for a polyethylene sleeve method which can be easily formed at a construction site and can be carried out at a low cost.

【０００８】[0008]

【課題を解決するための手段】上記課題を解決するた
め、請求項１のポリエチレンスリーブ工法用支持ネット
は、ポリエチレンスリーブで被覆した管継手部外面に巻
き付け固定される複数本の周方向緊締部材と、前記継手
部の少なくとも下半底部に沿って前記緊締部材に交差し
て配置される複数の軸方向支持部材からなるポリエチレ
ンスリーブ工法用支持ネットであって、前記複数本の周
方向緊締部材は弾性を有する合成樹脂製、前記軸方向支
持部材は硬質合成樹脂製とされ、該軸方向支持部材に前
記周方向緊締部材を着脱自在に固定する係止部が設けら
れてなる。In order to solve the above-mentioned problems, a support sleeve for a polyethylene sleeve method according to the first aspect of the present invention includes a plurality of circumferential tightening members wound around an outer surface of a pipe joint portion covered with a polyethylene sleeve. A support net for a polyethylene sleeve method comprising a plurality of axial support members arranged to intersect the tightening member along at least a lower half bottom portion of the joint portion, wherein the plurality of circumferential tightening members are elastic. The axial support member is made of a hard synthetic resin, and the axial support member is provided with a locking portion for detachably fixing the circumferential tightening member.

【０００９】従って、この請求項１のポリエチレンスリ
ーブ工法用支持ネットによれば、周方向緊締部材が柔軟
な屈曲性を有していても軸方向支持部材が硬質合成樹脂
製であるので係止部に周方向緊締部材を容易に固定する
ことができ、ポリエチレンスリーブ工法用支持ネットの
組み立て、成形が容易となる。Therefore, according to the support sleeve for the polyethylene sleeve method of the present invention, even if the circumferential direction tightening member has flexibility, the axial direction support member is made of a hard synthetic resin, so that the locking portion is formed. In this case, the circumferential tightening member can be easily fixed, and assembling and forming of the support sleeve for the polyethylene sleeve method can be facilitated.

【００１０】[0010]

【発明の実施の形態】次に、この発明の実施の形態を説
明する。図１は、この発明の実施の形態のポリエチレン
スリーブ工法用支持ネットの平面図、図２は図１のＡ−
Ａ線矢視拡大断面図を示す。Next, an embodiment of the present invention will be described. FIG. 1 is a plan view of a support sleeve for a polyethylene sleeve method according to an embodiment of the present invention, and FIG.
FIG. 2 shows an enlarged cross-sectional view taken along line A.

【００１１】図１において、ポリエチレンスリーブ工法
用支持ネットは継手部周方向に沿う複数の周方向緊締部
材７ａ、７ａ、７ｂと、継手部の少なくとも下底部に沿
って前記緊締部材７ａ…７ｂと交差状態で連結される、
複数の軸方向支持部材８…８とから構成されている。In FIG. 1, a support sleeve for a polyethylene sleeve method intersects a plurality of circumferential tightening members 7a, 7a, 7b along the circumferential direction of the joint portion and the tightening members 7a... 7b along at least the lower bottom of the joint portion. Linked in a state,
A plurality of axial support members 8... 8 are provided.

【００１２】上記の周方向緊締部材７ａ、７ａ、７ｂは
耐薬品性に優れ引張強度、伸縮弾性に優れた合成樹脂例
えばエチレン・プロピレン・共重合体（ＥＰＲ）より成
形された紐状体をＵ字状に折り返したものが使用され、
折り返された他端７Ｔ、７Ｔにはバックル５…５が取り
付けられている。The circumferential tightening members 7a, 7a, 7b are made of a synthetic resin having excellent chemical resistance and excellent tensile strength and elasticity, such as ethylene-propylene-copolymer (EPR). The one folded in the shape of a letter is used,
Buckles 5 ... 5 are attached to the folded back ends 7T, 7T.

【００１３】一方、軸方向支持部材８…８は、弾性が低
く、屈曲性の低い帯板状の硬質合成樹脂製とされ、例え
ば６６ナイロンやポリプロピレンのような合成樹脂製と
される。On the other hand, the axial support members 8,... 8 are made of a strip-shaped hard synthetic resin having low elasticity and low flexibility, for example, synthetic resin such as 66 nylon or polypropylene.

【００１４】なお、軸方向支持部材８…８は、図示のよ
うに継手部の最下底部のものと、周方向に隔てた両側に
一本づつの合計３本を平行に設ける他、図示は省略する
が中央を挟んだ両側にさらに多数の軸方向支持部材を平
行に設けても良い。The axial support members 8,... 8 are provided at the bottom of the joint portion as shown in the figure, and a total of three axial support members are provided on both sides separated in the circumferential direction. Although omitted, more axial support members may be provided in parallel on both sides of the center.

【００１５】そして、上記軸方向支持部材８…８の表面
には、周方向緊締部材７ａ、７ａ、７ｂとの交差部に係
止部１０…１０が設けられている。この係止部１０は、
図２に示すように一端１０ａが軸方向支持部材８表面に
連続成形され、他端に係合孔１０ｂが貫通形成されたバ
ンド部材１０ｃと、軸方向支持部材８表面に突設され、
前記バンド部材１０ｃの係合孔１０ｂに係合する、先端
にテーパ状の拡大部１０ｄを有した係止突起１０ｅとか
ら構成されている。On the surface of the axial support members 8,..., Locking portions 10... 10 are provided at intersections with the circumferential tightening members 7a, 7a, 7b. This locking portion 10
As shown in FIG. 2, one end 10 a is continuously formed on the surface of the axial support member 8, and the other end is formed with a band member 10 c having an engagement hole 10 b formed therethrough.
And a locking projection 10e having a tapered enlarged portion 10d at the tip for engaging with the engagement hole 10b of the band member 10c.

【００１６】そして、このポリエチレンスリーブ工法用
支持ネットを組立て、成形する場合は、図１に示すよう
に軸方向支持部材８の所定の係止部１０におけるバンド
部材１０ｃの内側部分に周方向緊締部材７ａ、７ｂ、７
ａをこの順に軸方向支持部材８に対し交差して位置さ
せ、バンド部材１０ｃの係合孔１０ｂにテーパ状の係止
突起１０ｅを押し込んで両者を係合させることで、周方
向緊締部材７ａ、７ｂ、７ａを軸方向支持部材８とバン
ド部材１０ｃとで挟み付けるようにして係止していく。When assembling and forming the support net for the polyethylene sleeve method, as shown in FIG. 1, a circumferential tightening member is provided on the inner side of the band member 10c at the predetermined locking portion 10 of the axial support member 8. 7a, 7b, 7
a is positioned in this order so as to intersect the axial support member 8, and the tapered locking projections 10 e are pushed into the engagement holes 10 b of the band member 10 c to engage with both members, whereby the circumferential tightening members 7 a, 7b and 7a are locked by being sandwiched between the axial support member 8 and the band member 10c.

【００１７】これにより管継手の寸法に合わせた平行間
隔Ｌ、Ｌに周方向緊締部材７ａ、７ｂ、７ａが係止され
る。次いで、軸方向支持部材８…８の間隔を管継部の径
に合わせ図１に示すようにに順次係合させることによっ
て周方向緊締部材７ａ〜７ｂと軸方向支持部材８…８と
をネット状に係止する。As a result, the circumferential tightening members 7a, 7b, 7a are locked at the parallel intervals L, L corresponding to the dimensions of the pipe joint. Next, the gaps between the axial support members 8... 8 are adjusted according to the diameter of the pipe joint portion and are sequentially engaged as shown in FIG. Lock in the shape.

【００１８】このとき、軸方向支持部材８…８は、伸び
や屈曲性の少ない硬質材質とされているので周方向緊締
部材７ａ…７ｂの係止作業が容易に行なえる。以後は、
図４、図５に示した従来例と同様、軸方向支持部材８…
８が継手部２（図４）の下半部に位置するようにして周
方向緊締部材７ａ〜７ｂを管継手部周囲に巻き付け、バ
ックル５…５に図３に示すように、周方向緊締部材７ａ
〜７ｂのＵ字状折り返し部７Ｕを係止して周方向緊締部
材７ａ〜７ｂを緊締する。At this time, since the axial support members 8 are made of a hard material having little expansion and flexibility, the work of locking the circumferential tightening members 7a to 7b can be easily performed. After that,
As in the conventional example shown in FIGS.
The circumferential tightening members 7a to 7b are wound around the pipe joint so that 8 is located in the lower half of the joint portion 2 (FIG. 4), and as shown in FIG. 7a
7U are locked by locking the U-shaped folded portions 7U of the peripheral direction tightening members 7a to 7b.

【００１９】これによって、ポリエチレンスリーブ工法
用支持ネットの取付けは終了する。Thus, the mounting of the support sleeve for the polyethylene sleeve method is completed.

【００２０】[0020]

【実施例】周方向緊締部材７ａ〜７ｂを弾性を有するエ
チレン・プロピレン・共重合体（ＥＰＲ）製の紐状体で
成形すると共に、軸方向支持部材８…８を硬質プロピレ
ンでそれぞれ成形し、図１に示す周方向緊締部材間の間
隔Ｌを８０ｍｍ、軸方向支持部材８間の間隔Ｓを１２０
ｍｍ、周方向緊締部材７ａ〜７ｂの延出距離Ｓａを８０
ｍｍ、同Ｓｂを１８０ｍｍとして、係止部１０で縦横に
係止し、外周にポリエチレンスリーブを被せたφ１００
ｍｍの管継手部の外周に巻き付け、周方向緊締部材７ａ
〜７ｂを弾性的に引き延ばし、Ｕ字状部７Ｕ…７Ｕを図
３に示したようにバックル５に係止することにより固定
した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The circumferential tightening members 7a to 7b are formed of a string made of an ethylene-propylene-copolymer (EPR) having elasticity, and the axial support members 8 ... 8 are each formed of hard propylene. The distance L between the circumferential tightening members shown in FIG.
mm, the extension distance Sa of the circumferential tightening members 7a to 7b is 80
φ is 100 mm, the Sb is 180 mm, the length and width are locked by the locking portion 10 and the outer circumference is covered with a polyethylene sleeve.
mm pipe joint part, and the circumferential direction tightening member 7a
7b were elastically stretched, and the U-shaped parts 7U... 7U were fixed to the buckle 5 as shown in FIG.

【００２１】比較例として、周方向緊締部材７ａ〜７ｂ
と軸方向支持部材８…８の両者を共に弾性を有するエチ
レン・プロピレン・共重合体（ＥＰＲ）で成形したもの
を用い、互いの交差部を締め具で結合した後は実施例と
同様にポリエチレンスリーブ工法による管継手部の保持
を行なった。As comparative examples, circumferential tightening members 7a to 7b
And both the axial support members 8... 8 are formed of an ethylene-propylene-copolymer (EPR) having elasticity, and after crossing each other with a fastener, polyethylene is used in the same manner as in the embodiment. The pipe joint was held by the sleeve method.

【００２２】この作業を２０回行ない、実施例と比較例
との一回の作業の平均所要時間を比較したところ、弾性
変形し易い素材を使用した比較例のものは組み立てに手
間がかかったため、取付け終了までに至る時間が３０秒
要していたのに対し、硬質の軸方向支持部材８…８を用
いた本実施例の場合は２０秒ですみ、施工時間が２／３
に短縮された。This operation was performed 20 times, and the average required time of one operation of the embodiment and the comparative example was compared. While it took 30 seconds to complete the installation, this embodiment using the hard axial support members 8... 8 requires only 20 seconds, and the construction time is 2/3.
Was shortened to

【００２３】[0023]

【発明の効果】以上説明したように、この発明のポリエ
チレンスリーブ工法用支持ネットによればポリエチレン
スリーブ工法を実施する場合、管継手部の外周を緊締す
る緊締部材と軸方向支持部材とが、軸方向支持部材に設
けられた係止部で簡単に取付けでき、しかも軸方向支持
部材は、硬質材質とされているので取付け施工時に軟質
ゴムのような手間がかからず、迅速に施工ができるなど
の効果を有する。As described above, according to the support sleeve for the polyethylene sleeve method of the present invention, when the polyethylene sleeve method is carried out, the tightening member for tightening the outer periphery of the pipe joint portion and the axial support member are axially supported. It can be easily installed with the locking part provided on the directional support member, and because the axial direction support member is made of hard material, it can be installed quickly without the hassle of soft rubber when installing. Has the effect of

【００２４】また、管継手のサイズが異なる場合、軸方
向支持部材は共通で、長さの異なる周方向緊締部材のみ
を交換すれば良いだけであるので、ポリエチレンスリー
ブ工法用支持ネットを一体成形する場合に比べ非常に安
価に提供できる効果を有する。When the size of the pipe joint is different, the support member for the polyethylene sleeve method is integrally formed because the axial support member is common and only the circumferential tightening members having different lengths need to be replaced. This has the effect that it can be provided at a very low cost as compared with the case.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の実施の形態であるポリエチレンスリ
ーブ工法用支持ネットの平面図である。FIG. 1 is a plan view of a support sleeve for a polyethylene sleeve method according to an embodiment of the present invention.

【図２】図１のＡ-Ａ線断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図３】周方向緊締部材の緊締状態を示す要部説明斜視
図である。FIG. 3 is an explanatory perspective view of a main part showing a tightened state of a circumferential tightening member.

【図４】ポリエチレンスリーブ工法を実施した場合の管
継手部の説明側面図である。FIG. 4 is an explanatory side view of a pipe joint when a polyethylene sleeve method is used.

【図５】図４のＢ−Ｂ線断面図である。FIG. 5 is a sectional view taken along line BB of FIG. 4;

【符号の説明】[Explanation of symbols]

１ ポリエチレンスリーブ ７ａ 周方向緊締部材（両側部） ７ｂ 周方向緊締部材（中央部） ８ 軸方向支持部材 １０ 係止部 １０ａ 一端 １０ｂ 係合孔 １０ｃ バンド部材 １０ｄ 拡大部 １０ｅ 係止突起 DESCRIPTION OF SYMBOLS 1 Polyethylene sleeve 7a Circumferential tightening member (both sides) 7b Circumferential tightening member (central part) 8 Axial support member 10 Locking part 10a One end 10b Engaging hole 10c Band member 10d Enlarged part 10e Locking protrusion

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 ポリエチレンスリーブで被覆した管継手
部外面に巻き付け固定される複数本の周方向緊締部材
と、前記継手部の少なくとも下半底部に沿って前記緊締
部材に交差して配置される複数の軸方向支持部材からな
るポリエチレンスリーブ工法用支持ネットであって、前
記複数本の周方向緊締部材は弾性を有する合成樹脂製、
前記軸方向支持部材は硬質合成樹脂製とされ、該軸方向
支持部材に前記周方向緊締部材を着脱自在に固定する係
止部が設けられてなるポリエチレンスリーブ工法用支持
ネット。1. A plurality of circumferential tightening members wound around and fixed to an outer surface of a pipe joint section covered with a polyethylene sleeve, and a plurality of circumferential tightening members arranged along at least a lower half bottom of the joint section and intersecting the tightening member. A support net for a polyethylene sleeve method comprising an axial support member, wherein the plurality of circumferential tightening members are made of synthetic resin having elasticity,
A support net for a polyethylene sleeve method, wherein the axial support member is made of a hard synthetic resin, and the axial support member is provided with a locking portion for detachably fixing the circumferential tightening member.