JP4460038B2

JP4460038B2 - Diameter expansion retaining material for cold shrinkable covers

Info

Publication number: JP4460038B2
Application number: JP2000316556A
Authority: JP
Inventors: 順士平野
Original assignee: Furukawa Electric Co Ltd
Current assignee: Furukawa Electric Co Ltd
Priority date: 2000-10-17
Filing date: 2000-10-17
Publication date: 2010-05-12
Anticipated expiration: 2020-10-17
Also published as: JP2002120289A

Description

【０００１】
【発明の属する技術分野】
本発明は常温収縮性カバー用の拡径保持材に関するものである。
【０００２】
【従来の技術】
最近、電線、ケーブル、パイプ等の接続部等を構成する装着対象物を電気絶縁被覆、防水保護、或いは補修するために、当該装着対象物に装着される収縮性カバーとして、熱収縮性カバーのほかに、常温収縮性カバーも用いられている。
この常温収縮性カバー１は、図７に示すように、ゴム状弾性を有するシリコーンゴムやＥＰゴム等よりなる筒状体で構成され、拡径保持材２の外周に拡径状態で保持される。
【０００３】
また、拡径保持材２は、図７及び図８（イ）（ロ）に示すように、一方の側縁に係合部であるＬ形フック３ａを有し、他方の側縁に係合部である逆Ｌ形フック３ｂを有し、ポリプロピレン、ポリエチレン、ポリ塩化ビニール等よりなる断面角形状の紐状体３を螺旋状に巻き付け、隣接する紐状体３のＬ形フック３ａと逆Ｌ形フック３ｂとをかみ合わせて係合することにより筒状に形成し、更に係合状態を補強するために、逆Ｌ形フック３ｂの外周面を紐状体３の長手方向にそってミシン目状に超音波溶接等して接合することにより得られる。
【０００４】
この常温収縮性カバー１を、図７に示すように、拡径保持材２に被せて装着するには、例えば、図９に示すように、拡径保持材支持部４ａとその先端にテーパ付ガイド部４ｂとを有する拡径治具４の拡径保持材支持部４ａの外周に、予め拡径保持材２を被せ、拡径保持材支持部４ａの後部に取り付けたストッパ５にて保持する。次に、常温収縮性カバー１が拡径保持材２の外周面を滑り易いように、拡径治具４のテーパ付ガイド部４ｂ及び拡径保持材２の表面にシリコーンオイル、シリコーングリース、フッ素オイル、エチレングリコール、パラフィンワックス、水等の潤滑材６を塗布又は付着させる。次に、常温収縮性カバー１を矢印方向に移動させて拡径治具４のテーパ付ガイド部４ｂに圧入して拡径させながら拡径保持材２に装着する。次に、ストッパ５を取り外し、常温収縮性カバー１を押さえながら、拡径治具４を図の左方へ移動させて拡径保持材２から抜き取る。
【０００５】
このようにして、図７に示すような、拡径保持材２で拡径保持された常温収縮性カバー１を、装着対象物（図示せず）に装着する場合には、この常温収縮性カバー１を装着対象物の外周に嵌めて位置決めした状態で、拡径保持材２の一方の端部（図７の左側）から紐状体３を引き出し、この紐状体３を拡径保持材２内に通して他方の端部（図７の右側）側へ引き抜くことにより、拡径保持材２を一方の端部側から順次解体除去し、常温収縮性カバー１を自己収縮させて装着対象物に密着させることにより行う。
【０００６】
【発明が解決しようとする課題】
常温収縮性カバー１を拡径治具４に圧入して拡径保持材２に拡径保持し易くするために、予め拡径治具４及び拡径保持材２の表面に潤滑材６を塗布等するので、常温収縮性カバー１を拡径保持材２で拡径保持した後、拡径保持材２の外周面と常温収縮性カバー１の内周面との微小隙間（界面）、特に長手方向の中央部分の微小隙間に潤滑材６が密封され残留し易い（図７参照）。
そうすると、この常温収縮性カバー１を使用に備えて保管中、又は、これを装着対象物に装着して使用中、常温収縮性カバー１が潤滑材６によって侵されて劣化し、強度や弾性力が弱くなり、その電気絶縁性能、防水性能等が低下してカバーとしての機能を長期間にわたり安定して維持させることができず、耐寿命性が低下する問題があった。
また、拡径保持材２も同様に劣化して強度が弱くなり、座屈変形して常温収縮性カバーを長期間保管することができなくなる問題もあった。
【０００７】
本発明は、上記課題を解決し、常温収縮性カバー及び拡径保持材の潤滑材による劣化を防止し、カバー及び拡径保持材としての機能を長期間にわたり安定して維持できるようにした常温収縮性カバー用の拡径保持材を提供することを目的とする。
【０００８】
上記目的を達成するために、本発明の請求項１に記載された常温収縮性カバー用の拡径保持材は、両側縁に長手方向に沿って係合部を有する断面角形状の紐状体を螺旋状に巻き付け、隣接する紐状体同士を係合部で係合することにより筒状に形成した拡径保持材において、前記紐状体に潤滑材流出穴を設けたものである。
【０００９】
このような構成により、拡径保持材への常温収縮性カバーの装着を容易にするために拡径保持材の表面に塗布又は付着させた潤滑材が、常温収縮性カバーの装着後に、拡径保持材の外周面と常温収縮性カバーの内周面との微小隙間に介在しても、これを拡径保持材の紐状体に設けられた潤滑材流出穴を通してすみやかに流出させて抜くことができる。
このため、潤滑材が拡径保持材の外周面と常温収縮性カバーの内周面との微小隙間に残留しなくなり、この常温収縮性カバーを使用に備えて保管中、又は、これを装着対象物に装着して使用中、常温収縮性カバーが潤滑材によって侵されて劣化することがなくなり、従って、強度や弾性力が弱くなることがなくなり、その電気絶縁性能、防水性能等の低下を防止し、常温収縮性カバーの機能を長期間にわたり安定して維持させることができる。
また、拡径保持材も潤滑材によって劣化する恐れもなくなるので、強度が低下せず、座屈変形を起こさないので、常温収縮性カバーを長期間保管することができる。
【００１０】
また、本発明の請求項２に記載された拡径保持材は、前記請求項１に記載されたものにおいて、前記潤滑材流出穴を紐状体のいずれか一方または両方の係合部に設けるようにしたものである。
このような構成によると、拡径保持材と常温収縮性カバーの前記微小隙間に挟まれた潤滑材が拡径保持材を構成する紐状体の係合部を通って流出して拡径保持材から抜け出るので、その係合部が潤滑材で潤滑される。
このため、常温収縮性カバーを装着対象物に被せて装着する際、拡径保持材の紐状体を途中で装着対象物に絡まることなく円滑に引き抜くことが可能となり、拡径保持材の解体除去が容易になり、常温収縮性カバーの装着対象物への装着作業能率を向上することができ好ましい。
【００１１】
【発明の実施の形態】
次に本発明に係る常温収縮性カバー用の拡径保持材の実施形態を図面により説明する。図１及び図２は本発明の拡径保持材１０の第１実施形態を示すものである。この拡径保持材１０は、図２（イ）（ロ）に示すような、一方の側縁に長手方向に沿って係合部の例えばＬ形フック１２ａを有し、他方の側縁に長手方向に沿って係合部の例えば逆Ｌ形フック１２ｂを有し、ポリプロピレン、ポリエチレン、ポリ塩化ビニール等よりなる断面角形状（帯形状を含む）の紐状体１２を螺旋状に巻き付け、隣接する紐状体１２のＬ形フック１２ａと逆Ｌ形フック１２ｂとをかみ合わせて係合することにより円筒状に形成し、必要に応じて前記Ｌ形フック１２ａ及び逆Ｌ形フック１２ｂの係合状態を補強するために、逆Ｌ形フック１２ｂの外周面を紐状体１２の長手方向にそってミシン目状に超音波溶接等して接合することにより得られる。
【００１２】
このような拡径保持材１０の構成は従来のものと同一である。本発明の拡径保持材１０は、その主要構成である紐状体１２に潤滑材流出穴１４を設けたことを特徴とする。第１実施形態の拡径保持材１０においては、この潤滑材流出穴１４が、図１及び図２に示すように、矩形状を有し、前記紐状体１２のＬ形フック１２ａ及び逆Ｌ形フック１２ｂの係合溝底に紐状体１２の長手方向に沿って所定間隔をおいて複数設けられる。この潤滑材流出穴１４は紐状体１２を螺旋状に巻き付けて筒状に形成する前に設けられる。
【００１３】
この拡径保持材１０は、電線、ケーブル、パイプ等の接続部等を構成する装着対象物を電気絶縁被覆、防水保護、或いは補修するために、当該装着対象物に装着されるゴム状弾性を有するシリコーンゴム、ＥＰゴム、スチレンブタジエンゴム、クロロプレンゴム、ウレタンゴム等よりなる筒状の常温収縮性カバー１６を拡径状態で保持するために使用される。図３はこの拡径保持材１０に常温収縮性カバー１６を装着し、これを拡径状態で保持した状態を示すものである。
【００１４】
この拡径保持材１０に常温収縮性カバー１６を拡径して装着するためには、従来技術で説明した拡径治具等を用いるが、常温収縮性カバー１６を拡径して円滑に装着するために、通常、拡径治具及び拡径保持材１０の表面に、予めシリコーンオイル、シリコーングリース、フッ素オイル、エチレングリコール、パラフィンワックス、水等の潤滑材を塗布又は付着させる。この場合、潤滑材が常温収縮性カバー１６の拡径保持材１０への装着後に、拡径保持材１０の外周面と常温収縮性カバー１６の内周面との微小隙間に介在するが、前記潤滑材流出穴１４を通りすみやかに流出して図３の矢印方向へ抜けるので、潤滑材が拡径保持材１０の外周面と常温収縮性カバー１６の内周面との微小隙間に残留するのを防止することができる。
【００１５】
なお、潤滑材流出穴１４の形状は正方形状、円形状、楕円形状等でもよい。また、潤滑材流出穴１４は紐状体１２の係合部であるＬ形フック１２ａ及び逆Ｌ形フック１２ｂのいずれか一方のフック側に設けてもよい。また、潤滑材流出穴１４は紐状体１２の長手方向の全長にわたり設けてもよいし、或いは、拡径保持材１０において、潤滑材が残留し易い個所、例えば、中央付近の紐状体に設けるようにしてもよい。
【００１６】
図４及び図５は本発明の拡径保持材１８の第２実施形態を示すものである。この拡径保持材１８は、図５（イ）（ロ）に示すように、紐状体１２の両側縁に有する係合部のＬ形フック１２ａ及び逆Ｌ形フック１２ｂの部分を除く紐状体１２の本体部分１２ｃに例えば矩形状の潤滑材流出穴１４を設けたものであり、その他の構成は第１実施形態の拡径保持材１０と同じである。この潤滑材流出穴１４は図示するものでは、紐状体１２の本体部分１２ｃの長手方向に沿って所定間隔をおいて複数設けられる。また、この潤滑材流出穴１４は紐状体１２の本体部分１２ｃに紐状体１２の全長にわたり設けてもよいし、或いは、拡径保持材１８で潤滑材が残留し易い個所、例えば、中央付近の紐状体に設けるようにしてもよい。また、この潤滑材流出穴１４は、紐状体１２の本体部分１２ｃに、複数列（図示のものは１列）に設けるようにしてもよい。
【００１７】
図６はこの拡径保持材１８に常温収縮性カバー１６を装着し、これを拡径状態で保持した状態を示すものである。このような拡径保持材１８を使用しても、拡径保持材１８の外周面と常温収縮性カバー１６の内周面との微小隙間に介在する潤滑材が、前記潤滑材流出穴１４を通りすみやかに流出して図６の矢印方向へ抜けるので、潤滑材が拡径保持材１８の外周面と常温収縮性カバー１６の内周面との微小隙間に残留するのを防止することができる。
【００１８】
【発明の効果】
以上説明したように、本発明の常温収縮性カバー用の拡径保持材は、両側縁に長手方向に沿って係合部を有する断面角形状の紐状体を螺旋状に巻き付け、隣接する紐状体同士を係合部で係合することにより筒状に形成したものにおいて、前記紐状体に潤滑材流出穴を設けたので、潤滑材が拡径保持材の外周面と常温収縮性カバーの内周面との微小隙間に残留することがなくなり、常温収縮性カバーの保管中や装着対象物へ装着して使用中に、常温収縮性カバーが劣化して、強度や弾性力が弱くなることがなくなり、その電気絶縁性能、防水性能等の低下を防止し、常温収縮性カバーの機能を長期間にわたり安定して維持させることができ、耐寿命性を向上させることができる。また、拡径保持材も潤滑材によって劣化することがなくなるので、強度が低下して座屈変形するようなこともなくなり、常温収縮性カバーを長期間保管することができる。
【００１９】
また、前記潤滑材流出穴を紐状体のいずれか一方または両方の係合部に設けるようにすると、その係合部が潤滑材で潤滑されるため、常温収縮性カバーを装着対象物に被せて装着する際、拡径保持材の紐状体を途中で装着対象物に絡まることなく円滑に引き抜くことが可能となり、拡径保持材の解体除去が容易になり、常温収縮性カバーの装着対象物への装着作業を能率よく行うことができ好ましい。
【図面の簡単な説明】
【図１】本発明に係る常温収縮性カバー用の拡径保持材の第１実施形態を示す縦断面図である。
【図２】図１の拡径保持材を構成する紐状体を示すもので、（イ）は平面図、（ロ）は（イ）のＸ−Ｘ線矢視断面図である。
【図３】図１の拡径保持材に常温収縮性カバーを装着し、これを拡径状態で保持した状態を示す一部縦断面側面図である。
【図４】本発明に係る常温収縮性カバー用の拡径保持材の第２実施形態を示す縦断面図である。
【図５】図４の拡径保持材を構成する紐状体を示すもので、（イ）は平面図、（ロ）は（イ）のＸ−Ｘ線矢視断面図である。
【図６】図４の拡径保持材に常温収縮性カバーを装着し、これを拡径状態で保持した状態を示す一部縦断面側面図である。
【図７】従来の拡径保持材に常温収縮性カバーを装着し、これを拡径状態で保持した状態を示す一部縦断面側面図である。
【図８】従来の拡径保持材を構成する紐状体を示すもので、（イ）は平面図、（ロ）は（イ）のＸ−Ｘ線矢視断面図である。
【図９】従来の拡径保持材に常温収縮性カバーを装着する状態を示す説明図である。
【符号の説明】
１０、１８拡径保持材
１２紐状体
１２ａＬ形フック
１２ｂ逆Ｌ形フック
１２ｃ本体部分
１４潤滑材流出穴
１６常温収縮性カバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an enlarged diameter holding material for a cold shrinkable cover.
[0002]
[Prior art]
Recently, a heat-shrinkable cover has been used as a shrinkable cover to be attached to an object to be attached in order to electrically insulate, waterproof, or repair the object that constitutes a connection part such as an electric wire, cable, or pipe. In addition, cold shrinkable covers are also used.
As shown in FIG. 7, the room temperature shrinkable cover 1 is formed of a cylindrical body made of silicone rubber, EP rubber or the like having rubber-like elasticity, and is held in an expanded state on the outer periphery of the expanded diameter holding material 2. .
[0003]
Further, as shown in FIGS. 7 and 8 (A) and (B), the expanded diameter holding member 2 has an L-shaped hook 3a as an engaging portion on one side edge, and is engaged with the other side edge. It has a reverse L-shaped hook 3b which is a portion, and a string-shaped body 3 having a square cross section made of polypropylene, polyethylene, polyvinyl chloride or the like is spirally wound, and is opposite to the L-shaped hook 3a of the adjacent string-shaped body 3 In order to reinforce the engaged state, the outer peripheral surface of the inverted L-shaped hook 3b is perforated along the longitudinal direction of the string-like body 3 so as to be engaged with and engaged with the hook 3b. It is obtained by joining by ultrasonic welding or the like.
[0004]
In order to mount the room temperature shrinkable cover 1 on the diameter expansion holding material 2 as shown in FIG. 7, for example, as shown in FIG. 9, the diameter expansion holding material support 4a and the tip thereof are tapered. The diameter expansion holding material support part 4a of the diameter expansion jig 4 having the guide part 4b is covered with the diameter expansion holding material 2 in advance and held by the stopper 5 attached to the rear part of the diameter expansion holding material support part 4a. . Next, silicone oil, silicone grease, fluorine on the surface of the tapered guide portion 4b of the diameter expansion jig 4 and the diameter expansion holding material 2 so that the room temperature shrinkable cover 1 can easily slide on the outer peripheral surface of the diameter expansion holding material 2. A lubricant 6 such as oil, ethylene glycol, paraffin wax, or water is applied or adhered. Next, the room temperature shrinkable cover 1 is moved in the direction of the arrow, and is inserted into the tapered guide portion 4b of the diameter expansion jig 4 to be attached to the diameter expansion holding material 2 while expanding the diameter. Next, the stopper 5 is removed, and the diameter expansion jig 4 is moved to the left in the drawing while holding the room temperature shrinkable cover 1 and is extracted from the diameter expansion holding material 2.
[0005]
In this way, when the room temperature shrinkable cover 1 expanded in diameter and held by the diameter expanded holding material 2 as shown in FIG. 7 is mounted on a mounting object (not shown), this room temperature shrinkable cover. In a state where 1 is fitted and positioned on the outer periphery of the mounting object, the string-like body 3 is pulled out from one end portion (left side in FIG. 7) of the diameter-enlarged holding material 2, and the string-like body 3 is pulled out from the diameter-enlarged holding material 2. The diameter expansion holding material 2 is sequentially dismantled and removed from one end side by pulling it into the other end (right side in FIG. 7) side, and the room temperature shrinkable cover 1 is self-contracted to be mounted. It is performed by making it adhere to.
[0006]
[Problems to be solved by the invention]
Lubricant 6 is applied in advance to the surfaces of the diameter expansion jig 4 and the diameter expansion holding material 2 in order to press-fit the room temperature shrinkable cover 1 into the diameter expansion jig 4 so that the diameter expansion holding material 2 is easily expanded. Therefore, after the cold-shrinkable cover 1 is expanded and held by the expanded-diameter holding material 2, a minute gap (interface) between the outer peripheral surface of the expanded-diameter holding material 2 and the inner peripheral surface of the cold-shrinkable cover 1, particularly the length The lubricant 6 is sealed and easily remains in the minute gap in the central portion of the direction (see FIG. 7).
As a result, the cold-shrinkable cover 1 is deteriorated by being eroded by the lubricant 6 while being stored in preparation for use or being used by being attached to a wearing object. However, the electrical insulation performance, waterproof performance, and the like are lowered, and the function as the cover cannot be stably maintained over a long period of time, resulting in a problem that the life resistance is lowered.
In addition, the expanded diameter holding material 2 is similarly deteriorated and weakened, and has a problem that the cold shrinkable cover cannot be stored for a long time due to buckling deformation.
[0007]
The present invention solves the above problems, prevents deterioration of the cold shrinkable cover and the expanded diameter holding material due to the lubricant, and allows the functions as the cover and the expanded diameter holding material to be stably maintained over a long period of time. An object of the present invention is to provide an expanded diameter holding material for a shrinkable cover.
[0008]
In order to achieve the above object, a diameter-enlarged holding material for a cold-shrinkable cover according to claim 1 of the present invention is a string-like body having an angular cross section having engaging portions along the longitudinal direction on both side edges. Is formed in a cylindrical shape by engaging adjacent string-like bodies with an engaging portion, and a lubricant outflow hole is provided in the string-like body.
[0009]
With such a configuration, the lubricant applied or adhered to the surface of the diameter expansion holding material in order to facilitate the installation of the room temperature shrinkable cover to the diameter expansion holding material is expanded after the room temperature shrinkable cover is mounted. Even if it is interposed in the minute gap between the outer peripheral surface of the holding material and the inner peripheral surface of the room temperature shrinkable cover, it is quickly drained through the lubricant outflow hole provided in the string member of the expanded diameter holding material. Can do.
For this reason, the lubricant does not remain in the minute gap between the outer peripheral surface of the expanded diameter holding material and the inner peripheral surface of the cold shrinkable cover, and this cold shrinkable cover is stored in preparation for use or is attached. During use while attached to an object, the normal temperature shrinkable cover will not be damaged by the lubricant and will not be deteriorated. Therefore, the strength and elasticity will not be weakened, and its electrical insulation performance, waterproof performance, etc. will be prevented from deteriorating. In addition, the function of the cold shrinkable cover can be stably maintained over a long period of time.
Further, since there is no possibility that the expanded diameter holding material is deteriorated by the lubricant, the strength does not decrease and buckling deformation does not occur, so that the room temperature shrinkable cover can be stored for a long time.
[0010]
Moreover, the diameter expansion holding material described in claim 2 of the present invention is the one described in claim 1, wherein the lubricant outflow hole is provided in one or both engaging portions of the string-like body. It is what I did.
According to such a configuration, the lubricant sandwiched between the minute gaps of the expanded diameter holding material and the room temperature shrinkable cover flows out through the engaging portion of the string-like body constituting the expanded diameter holding material and maintains the expanded diameter. Since it comes out of the material, the engaging portion is lubricated with the lubricant.
For this reason, when attaching the room temperature shrinkable cover to the object to be attached, it becomes possible to smoothly pull out the string member of the enlarged diameter holding material without being entangled with the attached object on the way, and dismantling the enlarged diameter holding material Removal is facilitated, and the work efficiency of attaching the cold shrinkable cover to the attachment object can be improved, which is preferable.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a diameter expansion holding material for a cold shrinkable cover according to the present invention will be described with reference to the drawings. FIG.1 and FIG.2 shows 1st Embodiment of the diameter expansion holding material 10 of this invention. This expanded diameter holding member 10 has, for example, an L-shaped hook 12a as an engaging portion along the longitudinal direction on one side edge as shown in FIGS. Along the direction, for example, an inverted L-shaped hook 12b of an engaging portion is provided, and a string-like body 12 having a square cross section (including a belt shape) made of polypropylene, polyethylene, polyvinyl chloride or the like is spirally wound and adjacent. The L-shaped hook 12a and the inverted L-shaped hook 12b of the string-like body 12 are engaged with each other and engaged with each other to form a cylindrical shape, and the L-shaped hook 12a and the inverted L-shaped hook 12b are engaged as necessary. In order to reinforce, it is obtained by joining the outer peripheral surface of the inverted L-shaped hook 12b in a perforated shape along the longitudinal direction of the string-like body 12 by ultrasonic welding or the like.
[0012]
The configuration of the expanded diameter holding member 10 is the same as that of the conventional one. The expanded diameter holding material 10 of the present invention is characterized in that a lubricant outflow hole 14 is provided in a string-like body 12 which is the main configuration. In the expanded diameter holding member 10 of the first embodiment, the lubricant outflow hole 14 has a rectangular shape as shown in FIGS. 1 and 2, and the L-shaped hook 12 a and the reverse L of the string-like body 12. A plurality of hooks 12b are provided at predetermined intervals along the longitudinal direction of the string-like body 12 at the bottom of the engagement groove of the hook 12b. This lubricant outflow hole 14 is provided before the string-like body 12 is spirally wound and formed into a cylindrical shape.
[0013]
The expanded diameter holding member 10 has a rubber-like elasticity to be attached to the attachment object in order to electrically insulate, waterproof, or repair the attachment object that constitutes a connection portion such as an electric wire, cable, or pipe. It is used to hold the cylindrical room temperature shrinkable cover 16 made of silicone rubber, EP rubber, styrene butadiene rubber, chloroprene rubber, urethane rubber or the like in an expanded state. FIG. 3 shows a state in which the room temperature shrinkable cover 16 is attached to the expanded diameter holding member 10 and is held in an expanded state.
[0014]
In order to expand the room temperature shrinkable cover 16 to the diameter expanded holding material 10, the diameter expansion jig described in the prior art is used, but the room temperature shrinkable cover 16 is expanded and smoothly mounted. For this purpose, a lubricant such as silicone oil, silicone grease, fluorine oil, ethylene glycol, paraffin wax, or water is usually applied or adhered to the surface of the diameter expansion jig and the diameter expansion holding material 10 in advance. In this case, the lubricant is interposed in a minute gap between the outer peripheral surface of the diameter expansion holding material 10 and the inner peripheral surface of the room temperature shrinkable cover 16 after the room temperature shrinkable cover 16 is attached to the diameter expansion holding material 10. Since it quickly flows out through the lubricant outlet hole 14 and escapes in the direction of the arrow in FIG. 3, the lubricant remains in a minute gap between the outer peripheral surface of the expanded diameter holding member 10 and the inner peripheral surface of the room temperature shrinkable cover 16. Can be prevented.
[0015]
The shape of the lubricant outflow hole 14 may be a square shape, a circular shape, an elliptical shape, or the like. Further, the lubricant outlet hole 14 may be provided on either one of the L-shaped hook 12a and the inverted L-shaped hook 12b which are the engaging portions of the string-like body 12. Further, the lubricant outlet hole 14 may be provided over the entire length in the longitudinal direction of the string-like body 12, or, in the enlarged diameter holding member 10, a portion where the lubricant is likely to remain, for example, a string-like body near the center. You may make it provide.
[0016]
4 and 5 show a second embodiment of the expanded diameter holding member 18 of the present invention. As shown in FIGS. 5 (a) and 5 (b), the expanded diameter holding member 18 has a string shape excluding the portions of the L-shaped hook 12a and the inverted L-shaped hook 12b of the engaging portion on both side edges of the string-like body 12. For example, a rectangular lubricant outflow hole 14 is provided in the main body portion 12c of the body 12, and other configurations are the same as those of the diameter expansion holding member 10 of the first embodiment. In the illustrated example, a plurality of the lubricant outflow holes 14 are provided at predetermined intervals along the longitudinal direction of the main body portion 12 c of the string-like body 12. Further, the lubricant outflow hole 14 may be provided in the main body portion 12c of the string-like body 12 over the entire length of the string-like body 12, or a portion where the lubricant tends to remain with the diameter-enlarged retaining material 18, for example, the center It may be provided on a nearby string-like body. The lubricant outlet holes 14 may be provided in a plurality of rows (one row in the figure) in the main body portion 12c of the string-like body 12.
[0017]
FIG. 6 shows a state in which the room temperature shrinkable cover 16 is attached to the expanded diameter holding member 18 and is held in the expanded diameter state. Even when such a diameter expansion holding material 18 is used, the lubricant interposed in the minute gap between the outer peripheral surface of the diameter expansion holding material 18 and the inner peripheral surface of the room temperature shrinkable cover 16 can cause the lubricant outflow hole 14 to remain. Since it quickly flows out and exits in the direction of the arrow in FIG. 6, it is possible to prevent the lubricant from remaining in a minute gap between the outer peripheral surface of the diameter expansion holding member 18 and the inner peripheral surface of the room temperature shrinkable cover 16. .
[0018]
【The invention's effect】
As described above, the expanded diameter holding material for a room temperature shrinkable cover according to the present invention spirally winds a string-like body having a square cross section having engaging portions along the longitudinal direction on both side edges, and adjacent strings. In the case where the cylindrical bodies are formed by engaging each other with the engaging portion, since the lubricant outlet hole is provided in the string-like body, the lubricant is provided on the outer peripheral surface of the expanded diameter holding material and the room temperature shrinkable cover. It will not remain in the minute gap with the inner peripheral surface of the material, and the room temperature shrinkable cover will be deteriorated during storage or use of the room temperature shrinkable cover, and its strength and elasticity will be weakened. Therefore, it is possible to prevent a decrease in the electrical insulation performance, waterproof performance, etc., maintain the function of the room temperature shrinkable cover stably over a long period of time, and improve the life resistance. Further, since the expanded diameter holding member is not deteriorated by the lubricant, the strength is not lowered and the buckling deformation is not caused, and the room temperature shrinkable cover can be stored for a long time.
[0019]
Further, when the lubricant outflow hole is provided in one or both of the engaging portions of the string-like body, the engaging portions are lubricated with the lubricant, so that the room temperature shrinkable cover is put on the object to be mounted. Can be pulled out smoothly without being entangled with the object to be attached, making it easy to dismantle and remove the expanded diameter holding material, and to attach a room temperature shrinkable cover. It is preferable because the work of attaching to an object can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a diameter expansion holding material for a cold-shrinkable cover according to the present invention.
2 shows a string-like body constituting the diameter-enlargement holding member of FIG. 1, (A) is a plan view, and (B) is a cross-sectional view taken along line XX of (A).
3 is a partial longitudinal cross-sectional side view showing a state where a room temperature shrinkable cover is attached to the diameter-enlarged holding material of FIG. 1 and is held in an expanded state. FIG.
FIG. 4 is a longitudinal sectional view showing a second embodiment of a diameter expansion holding material for a cold-shrinkable cover according to the present invention.
5A and 5B show a string-like body constituting the diameter-enlarged holding material of FIG. 4, wherein FIG. 5A is a plan view and FIG. 5B is a cross-sectional view taken along line XX of FIG.
6 is a partial vertical cross-sectional side view showing a state in which a room temperature shrinkable cover is attached to the diameter-enlarged holding material of FIG. 4 and is held in an expanded state.
FIG. 7 is a partial vertical cross-sectional side view showing a state in which a cold shrinkable cover is attached to a conventional diameter-enlarged holding material and is held in an expanded state.
FIGS. 8A and 8B show a string-like body constituting a conventional diameter-enlarged holding material, where FIG. 8A is a plan view and FIG. 8B is a cross-sectional view taken along line XX of FIG.
FIG. 9 is an explanatory view showing a state in which a room temperature shrinkable cover is attached to a conventional expanded diameter holding material.
[Explanation of symbols]
10, 18 Expanded diameter holding material 12 String-like body 12a L-shaped hook 12b Reverse L-shaped hook 12c Body portion 14 Lubricant outflow hole 16 Room temperature shrinkable cover

Claims

Cold shrinkage formed into a cylindrical shape by spirally winding a string-like body with an angular section along the longitudinal direction on both side edges and engaging adjacent string-like bodies with the engaging parts A diameter expansion holding material for a room temperature shrinkable cover, characterized in that a lubricant outflow hole is provided in the string-like body.

The diameter expansion holding material for a cold-shrinkable cover according to claim 1, wherein the lubricant outflow hole is provided in one or both engaging portions of the string-like body.