JP2000055283A - Joint sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a spiral from being disturbed by a sliding contact force in the axial core direction applied to the outer face and the inner face by fusing and fixing adjoining covered wires of the spiral composed of a thermoplastic polymer material covered wire incorporating a linear heating element to each other in the outer face, the inner face, or the whole face of the spiral. SOLUTION: A heating plate 5 heating to the melting temperature or more of a covered wire 1 composed of a thermoplastic polymer material is moved from a waiting position separating from the outer face of the spiral 6 on the surface of a winding roller 2 to a contacting fusion position and, after the heating plate 5 is brought in contact with the outer whole face of the spiral 6 by one rotation of the winding roller 2 or more at a prescribed speed, the heating plate 5 is quickly returned from the fusion position to the waiting position, and the coating material outside the spiral 6 is heated, melt, and fused so that the covered wires 1 are fixed so as not to be separated from each other. This constitution can prevent the spiral 6 from partially disturbed by the sliding contact between the sleeve inner face and the pipe outer face and between the sleeve outer face and the joint inner face in fitting the pipe to the joint.

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】本発明はポリエチレン等の熱
可塑性高分子材料からなる管類を接続するためのジョイ
ント用スリーブ、その製造方法及び使用方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint sleeve for connecting pipes made of a thermoplastic polymer material such as polyethylene, and a method of manufacturing and using the same.

【０００２】[0002]

【従来の技術】従来、特公平７−５１９９７号公報に、
線状発熱体を内蔵した熱可塑性高分子材料被覆線からな
る螺旋の隣接する被覆線同志を、螺旋外周の１箇所以上
で部分的に、融着し離れないように固定されたジョイン
ト用スリーブが記載されている。2. Description of the Related Art Conventionally, Japanese Patent Publication No. 7-51997 discloses that
A joint sleeve in which a spiral made of a thermoplastic polymer material-coated wire with a built-in linear heating element is fused and fixed so as not to be separated from one another at one or more locations on the outer periphery of the spiral. Has been described.

【０００３】[0003]

【発明が解決しようとする課題】ジョイント用スリーブ
は、小口径管と大口径管との嵌合部に介在させ、線状発
熱体に通電して小口径管外面と大口径管内面を加熱溶融
させて、小口径管と大口径管を融着させるものである。
小口径管と大口径管とを嵌合した際、スリーブ内面と小
口径管外面との間及びスリーブ外面と大口径管内面との
間に、隙間が生じると、熱伝達が適正に行われず、融着
させることができなくなる。従って小口径管と大口径管
とを、スリーブ内面と小口径管外面との間及びスリーブ
外面と大口径管内面との間に、隙間が生じがないよう
に、嵌合させる必要がある。しかし乍ら、従来のジョイ
ント用スリーブは、螺旋の隣接する被覆線同志を部分的
にしか融着していないため、小口径管と大口径管とを嵌
合させる際、スリーブ内面と小口径管外面との摺接又は
スリーブ外面と大口径管内面との摺接によって、螺旋の
隣接する被覆線が融着されていない部分で、螺旋が部分
的に乱れ、隣接する被覆線の間に部分的に隙間を生じ、
被覆線（線状発熱体）の密度が不均一になり、小口径管
外面と大口径管内面の樹脂を略均一に加熱することがで
きず、融着不良を起こす問題がある。The joint sleeve is interposed in the fitting portion between the small-diameter tube and the large-diameter tube, and the line heating element is energized to heat and melt the outer surface of the small-diameter tube and the inner surface of the large-diameter tube. Then, the small-diameter pipe and the large-diameter pipe are fused.
When the small-diameter pipe and the large-diameter pipe are fitted with each other, if a gap is generated between the inner surface of the sleeve and the outer surface of the small-diameter pipe and between the outer surface of the sleeve and the inner surface of the large-diameter pipe, heat transfer is not properly performed. It cannot be fused. Therefore, it is necessary to fit the small-diameter pipe and the large-diameter pipe so that there is no gap between the inner surface of the sleeve and the outer surface of the small-diameter pipe and between the outer surface of the sleeve and the inner surface of the large-diameter pipe. However, since the conventional joint sleeve only partially fuses the adjacent covered wires of the spiral, when the small diameter pipe and the large diameter pipe are fitted together, the inner surface of the sleeve and the small diameter pipe are not joined. Due to the sliding contact with the outer surface or the sliding contact between the outer surface of the sleeve and the inner surface of the large-diameter pipe, the spiral is partially disturbed at the portion where the adjacent coating wire of the spiral is not fused, and the spiral is partially disturbed between the adjacent coating wires. Creates a gap in
The density of the coated wire (linear heating element) becomes non-uniform, so that the resin on the outer surface of the small-diameter tube and the resin on the inner surface of the large-diameter tube cannot be heated substantially uniformly.

【０００４】然るに、線状発熱体を内蔵した熱可塑性高
分子材料被覆線を螺旋状に巻いて構成するジョイント用
スリーブにおいて、外面及び内面に軸芯方向の摺接力が
加えられても、螺旋が乱れない新規なジョイント用スリ
ーブを提供することを本発明の目的としている。However, in a joint sleeve formed by spirally winding a thermoplastic polymer material-coated wire having a built-in linear heating element, even if a sliding contact force in the axial direction is applied to the outer surface and the inner surface, the spiral is formed. It is an object of the present invention to provide a new joint sleeve which is not disturbed.

【０００５】[0005]

【課題を解決するための手段】上記の目的を達成するた
めの本発明のジョイント用スリーブは、線状発熱体を内
蔵した熱可塑性高分子材料被覆線からなる螺旋の隣接す
る被覆線同志を、螺旋の外面又は内面又はその両面の全
面で、融着し離れないように固定する。従って本発明の
ジョイント用スリーブは、小口径管と大口径管を嵌合さ
せる際、スリーブ内面と小口径管外面との摺接又はスリ
ーブ外面と大口径管内面との摺接によって、螺旋が部分
的に乱れ、隣接する被覆線の間に部分的に隙間を生じ、
被覆線の密度が不均一になることがないので、小口径管
外面と大口径管内面の樹脂を略均一に加熱することがで
き、融着不良を起こすことがない。In order to achieve the above object, a joint sleeve according to the present invention comprises a spirally-formed spirally-coated thermoplastic polymer material-containing wire having a built-in linear heating element. The entire surface of the outer surface or inner surface of the spiral or both surfaces thereof is fixed so as not to be fused and separated. Therefore, when the small-diameter pipe and the large-diameter pipe are fitted together, the joint sleeve according to the present invention has a partial spiral due to sliding contact between the sleeve inner surface and the small-diameter pipe outer surface or sliding contact between the sleeve outer surface and the large-diameter pipe inner surface. Turbulence, partially creating gaps between adjacent covered wires,
Since the density of the coated wire does not become non-uniform, the resin on the outer surface of the small-diameter tube and the resin on the inner surface of the large-diameter tube can be heated substantially uniformly, and no defective fusion occurs.

【０００６】本発明のジョイント用スリーブは、線状発
熱体を内蔵した熱可塑性高分子材料被覆線をローラの表
面に螺旋状に巻き付ける工程と、得られた螺旋の外面又
は内面又はその両面の全面で被覆材を外部熱器具によっ
て加熱溶融させ、螺旋の隣接する被覆線同志を離れない
ように固定する工程とから成る製造方法。によって得る
ことができる。[0006] The joint sleeve of the present invention comprises a step of spirally winding a thermoplastic polymer material-coated wire having a built-in linear heating element around the surface of a roller, and the outer surface or inner surface of the obtained spiral or the entire surface of both surfaces thereof. Heating and melting the coating material with an external heating device, and fixing the spirally coated wires so as not to be separated from each other. Can be obtained by

【０００７】本発明のジョイント用スリーブは、小口径
管と大口径管との嵌合部に介在させ、通電によって発熱
する材料から成る線状発熱体に通電して、小口径管外面
と大口径管内面を加熱溶融させて、小口径管と大口径管
を融着させる管類の接続方法に使用する。またジョイン
ト用スリーブを、管の外面に設け、管類として使用す
る。またジョイント用スリーブを管の内面に設け、継手
類として使用する。[0007] The joint sleeve of the present invention is interposed in a fitting portion between a small-diameter pipe and a large-diameter pipe, and energizes a linear heating element made of a material that generates heat by energization, so that the outer surface of the small-diameter pipe and the large-diameter pipe. The inner surface of the tube is heated and melted, and the tube is used for connecting the small diameter tube and the large diameter tube. Further, a joint sleeve is provided on the outer surface of the pipe and used as pipes. A joint sleeve is provided on the inner surface of the pipe and used as joints.

【０００８】本発明の管類には管の他、長い配管、各種
継手類、弁栓類を含み、これらの接続（ジョイント）と
は、管同志は無論、管と継手類、管と弁栓類、継手類と
弁栓類の接続を含む。また管類は全体が熱可塑性高分子
材料からなるものの他、接続部分だけを部分的に熱可塑
性高分子材料からなる筒部材によって形成した金属製の
ものでも良い。The pipes of the present invention include, in addition to pipes, long pipes, various joints, and valve plugs. These connections (joints) are, of course, pipes and pipes, pipes and joints, and pipes and valve plugs. Includes connections for fittings, fittings and valve plugs. The tubes may be made entirely of a thermoplastic polymer material, or may be made of a metal in which only the connecting portion is partially formed of a tubular member made of a thermoplastic polymer material.

【０００９】本発明において、線状発熱体としては、ニ
ッケル線、ニクロム線等、通電によって発熱する材料か
らなる線状のもの、即ち電熱線を用いる。また螺旋状に
巻かれた被覆線の被覆材が加熱されて溶融したとき、隣
接する線状発熱体同志が相互接触して短絡するのを防止
するため、線状発熱体には絶縁被膜を施すことが好まし
い。その絶縁材料としては、ガラス繊維編組、セラミッ
ク等の非金属絶縁材料、接続しようとする管類の成型材
料より溶融温度が高い（耐熱性が大きい）高分子絶縁材
料を用いる。また被覆線の被覆材としては、接続しよう
とする管の成型材料と同じ又は略同じ溶融温度を有し、
且つ親和性の大きい、接続しようとする管の成型材料と
同じ又は略同じ材質の熱可塑性高分子材料を用いる。例
えば接続しようとする管がポリエチレン製の場合、被覆
線の被覆材もポリエチレンを用いることが最も好まし
い。In the present invention, a linear heating element made of a material that generates heat when energized, such as a nickel wire or a nichrome wire, that is, a heating wire is used. Also, when the coating material of the spirally wound coated wire is heated and melted, an insulating coating is applied to the linear heating elements to prevent short circuit between adjacent linear heating elements due to mutual contact. Is preferred. As the insulating material, a non-metallic insulating material such as a glass fiber braid or a ceramic, or a polymer insulating material having a higher melting temperature (higher heat resistance) than a molding material of tubing to be connected is used. Also, as the covering material of the covered wire, it has the same or substantially the same melting temperature as the molding material of the pipe to be connected,
A thermoplastic polymer material having the same or substantially the same material as the molding material of the tube to be connected having high affinity is used. For example, when the pipe to be connected is made of polyethylene, it is most preferable to use polyethylene for the covering material of the covered wire.

【００１０】本発明において、１本の線状発熱体を内蔵
した熱可塑性高分子材料被覆線を単独で螺旋状に巻く
と、線状発熱体の両端が螺旋の両端に位置し、接続しよ
うとする管類の外部に一端は簡単に取り出せても、他端
は同様に外部に簡単に取り出せないので、１本の線状発
熱体を内蔵した熱可塑性高分子材料被覆線を２本平行に
且つ密着させて螺旋状に巻き、螺旋の一端側で２本の線
状発熱体を結線して１本化する。又は１本の線状発熱体
を内蔵した熱可塑性高分子材料被覆線を二つ折りにして
螺旋状に巻く。又は２本の線状発熱体を平行に内蔵した
熱可塑性高分子材料被覆線を単独で螺旋状に巻き、螺旋
の一端側で２本の線状発熱体を結線して１本化する。こ
れら３種類の方式によって線状発熱体の両端を螺旋の一
端側に位置させることができ、接続しようとする管類の
外部への線状発熱体の両端の取り出しが簡単に行える。
従って本発明においては、上記の３種類の方式の何れか
１つを適宜選択し、線状発熱体を内蔵した熱可塑性高分
子材料被覆線からなる螺旋を形成することが好ましい。[0010] In the present invention, when the thermoplastic polymer material-containing wire containing one linear heating element is spirally wound alone, both ends of the linear heating element are located at both ends of the spiral, and connection is attempted. Even if one end can be easily taken out to the outside of the tubing, the other end cannot be taken out easily to the outside as well. Therefore, two thermoplastic polymer material-coated wires containing one linear heating element are arranged in parallel and It is spirally wound in close contact, and two linear heating elements are connected at one end side of the spiral to make one. Alternatively, the thermoplastic polymer material-coated wire containing one linear heating element is folded in two and spirally wound. Alternatively, a thermoplastic polymer material-coated wire in which two linear heating elements are built in parallel is wound independently in a spiral shape, and the two linear heating elements are connected to one end at one end of the spiral to be integrated. With these three types of methods, both ends of the linear heating element can be positioned at one end of the spiral, and both ends of the linear heating element can be easily taken out of the pipes to be connected.
Therefore, in the present invention, it is preferable to appropriately select any one of the above three types and form a spiral made of a thermoplastic polymer material-coated wire having a built-in linear heating element.

【００１１】本発明において、熱可塑性高分子材料被覆
線を巻き付けるローラは、縦型とすることによって、隣
接する被覆線同志を離れないように固定した後、螺旋の
ローラからの取り外しが簡単に行えるので好ましい。ま
た熱可塑性高分子材料被覆線端部をローラの巻き取り開
始位置に止着するための被覆線止め具を、被覆線端部を
下方に引き抜き自在に挟持する構成にすることで、螺旋
をローラからの取り外す際、ローラの巻き取り開始位置
での被覆線端部の止着を人為操作で解く必要がなく、螺
旋のローラからの取り外しがより一層簡単に行えるので
好ましい。In the present invention, the roller around which the thermoplastic polymer material-coated wire is wound is of a vertical type, so that the adjacent coated wires are fixed so as not to be separated from each other, and then the spiral can be easily removed from the roller. It is preferred. In addition, the spiral wound roller is formed by holding the coated wire stopper for fixing the end of the thermoplastic polymer material-coated wire to the winding start position of the roller so that the coated wire end can be pulled out downward. When detaching the spiral from the roller, it is not necessary to manually release the end of the covered wire at the winding start position of the roller by manual operation, and the spiral can be more easily removed from the roller.

【００１２】外部熱器具としては、線状発熱体を内蔵し
た熱可塑性高分子材料被覆線からなる螺旋の隣接する被
覆線同志を、螺旋の外面の全面で、融着し離れないよう
に固定する場合は、外側から螺旋外面に接触させる縦長
の熱板を用い、ローラを１回転させることによって、螺
旋の外面全面に、被覆線の被覆材の溶融温度以上の所定
温度に加熱した、熱板を接触させる。線状発熱体を内蔵
した熱可塑性高分子材料被覆線からなる螺旋の隣接する
被覆線同志を、螺旋の内面の全面で、融着し離れないよ
うに固定する場合は、ローラの外面に嵌着する熱筒を用
い、その熱筒の表面に線状発熱体を内蔵した熱可塑性高
分子材料被覆線を螺旋状に巻き付けることによって、螺
旋の内面全面に熱筒を接触させ、巻き付け後、被覆線の
被覆材の溶融温度以上の所定温度に熱筒を加熱させる。
線状発熱体を内蔵した熱可塑性高分子材料被覆線からな
る螺旋の隣接する被覆線同志を、螺旋の外面と内面の両
面の全面で、融着し離れないように固定する場合は、上
記熱板と熱筒の両方を用いる。[0012] As the external heating device, the spirally-coated adjacent wires of a thermoplastic polymer material-coated wire having a built-in linear heating element are fixed on the entire outer surface of the spiral so as not to be fused and separated. In the case, a hot plate heated to a predetermined temperature equal to or higher than the melting temperature of the coating material of the coated wire over the entire outer surface of the spiral by rotating the roller once by using a vertically long hot plate contacting the outer surface of the spiral from the outside. Make contact. To fix adjacent spiral wires consisting of a thermoplastic polymer material coated wire with a built-in linear heating element over the entire inner surface of the spiral so as not to be fused and separated, fit to the outer surface of the roller Using a heated cylinder, a thermoplastic polymer material-coated wire having a built-in linear heating element is spirally wound around the surface of the heated cylinder. Is heated to a predetermined temperature equal to or higher than the melting temperature of the coating material.
The above-described heat is used to fix adjacent spiral-coated wires made of thermoplastic polymer material-coated wires with a built-in linear heating element over the entire outer surface and inner surface of the spiral so as not to be separated from each other. Use both a plate and a hot cylinder.

【００１３】[0013]

【発明の実施の形態】以下、本発明の実施例を図面に基
づいて詳述する。図１及び図２において、符号（１）は
ガラス繊維編組からなる絶縁被膜（１ｃ）を施した線状
発熱体であるニッケル線（１ａ）を１本内蔵した熱可塑
性高分子材料であるポリエチレン製の被覆線、（１ｂ）
は被覆線（１）の被覆、（２）は鉛直方向に軸芯を有す
る縦型の金属ローラであって、巻き付ける被覆線（１）
端部をローラの巻き取り開始位置となる上部表面との間
で下方に引き抜き自在に挟持する板バネ製の被覆線止め
具（３）を有する巻き取りローラ、（４）は水平方向に
軸芯を有する上下一対の金属ローラであって、巻き取り
ローラ（２）の外側近傍に配置され、上下のローラの間
から２本の被覆線（１）を上下に平行に且つ密着させ
て、巻き取りローラ（２）の表面に対し接線方向で繰り
出す上下一対の送りローラ、（５）は送りローラ（４）
と反対側の巻き取りローラ（２）の外側近傍で、巻き取
りローラ（２）の軸芯と平行に配置する外部熱器具であ
る縦長の熱板であって、左右中央部が巻き取りローラ
（２）に最も接近するように、断面円弧状に形成してい
る。Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1 and FIG. 2, reference numeral (1) denotes a thermoplastic polymer material made of polyethylene, which contains one nickel wire (1a) as a linear heating element provided with an insulating coating (1c) made of a glass fiber braid. (1b)
Is a covering of the covered wire (1), (2) is a vertical metal roller having a vertical axis, and the covered wire (1) to be wound.
A take-up roller having a covered wire stopper (3) made of a leaf spring for pulling the end of the end to an upper surface where the take-up of the roller is started, so that the end can be pulled out; A pair of upper and lower metal rollers, which are disposed near the outside of the take-up roller (2), and take up two covered wires (1) vertically and in parallel and closely from between the upper and lower rollers to take up A pair of upper and lower feed rollers that feed out tangentially to the surface of the roller (2), (5) is a feed roller (4)
A vertically elongated hot plate which is an external heating device arranged near the outside of the take-up roller (2) on the opposite side and parallel to the axis of the take-up roller (2). The cross section is formed in an arc shape so as to be closest to 2).

【００１４】そして、止め具（３）が送りローラ（４）
と略同じ高さになる巻き取り開始位置まで巻き取りロー
ラ（２）を下降させ、即ち巻き取りローラ（２）の巻き
取り開始位置と送りローラ（４）による被覆線繰り出し
位置とを略同じ高さにセットし、２本の被覆線（１）の
各端部を上下の送りローラ（４）の間を通して巻き取り
ローラ（２）の表面上部の巻き取り開始位置に止め具
（３）を介して挟持止着し、巻き取りローラ（２）を一
方向に所定速度で回転させ乍ら、この回転と同期させて
巻き取りローラ（２）の１回転当たり１本の被覆線
（１）の外径の２倍の寸法該巻き取りローラ（２）を上
昇移動させ、巻き取りローラ（２）の表面に、２本の被
覆線（１）を、隙間が生じないように密着させた状態
で、所定長さ螺旋状に巻き取る（巻き付ける）。Then, the stopper (3) is connected to the feed roller (4).
The take-up roller (2) is lowered to a take-up start position at which the take-up roller has substantially the same height as that of the take-up roller, that is, the take-up start position of the take-up roller (2) is substantially the same as the covered wire feeding position by the feed roller (4). Then, each end of the two covered wires (1) is passed between upper and lower feed rollers (4), and is stopped at a winding start position on the upper surface of the winding roller (2) via a stopper (3). While rotating the take-up roller (2) at a predetermined speed in one direction, the take-up roller (2) is rotated in synchronism with this rotation and the outside of one covered wire (1) per one turn of the take-up roller (2). The take-up roller (2) is moved upward by a dimension twice as large as the diameter, and the two covered wires (1) are brought into close contact with the surface of the take-up roller (2) so that no gap is formed. Winding (winding) spirally for a predetermined length.

【００１５】次に、被覆線（１）の被覆材の溶融温度
（ポリエチレンの場合、１２０度〜１３０度）以上の所
定温度に電気加熱してある熱板（５）を、巻き取りロー
ラ（２）表面の被覆線（１）からなる螺旋（６）の外面
に対し、離反する待機位置から、接触する融着位置に移
動させ、この状態で巻き取りローラ（２）を被覆線
（１）の巻き取り方向に所定速度で１回転（３６０度）
と少し回転させ、螺旋（６）の外面全面を熱板（５）に
接触させた後、熱板（５）を融着位置から待機位置に直
ちに復帰させ、螺旋（６）の外面の被覆材を全面的に加
熱溶融させて融着させ、螺旋（６）の隣接する被覆線
（１）同志を離れないように固定する。Next, a hot plate (5), which has been electrically heated to a predetermined temperature equal to or higher than the melting temperature (120 to 130 degrees in the case of polyethylene) of the covering material of the covering wire (1), is passed through a winding roller (2). ) The outer surface of the spiral (6) composed of the covered wire (1) is moved from the stand-by position that separates from the standby position to the fusion position where it comes into contact, and in this state, the take-up roller (2) is moved to the position of the covered wire (1). One rotation (360 degrees) at a predetermined speed in the winding direction
After slightly rotating the spiral (6) to bring the entire outer surface of the spiral (6) into contact with the hot plate (5), the hot plate (5) is immediately returned from the fusion position to the standby position, and the coating material on the outer surface of the spiral (6) is formed. Are heated and melted over the entire surface and fused, and the spirally-coated wires (6) are fixed so as not to separate from each other.

【００１６】次に、巻き取りローラ（２）と送りローラ
（４）との間で２本の被覆線（１）を図示しない切断機
構によって切断し、図示しない螺旋押し出し機構によっ
て、螺旋（６）の上端を下方に押し、螺旋（６）を巻き
取りローラ（２）から下方に取り外し、次の螺旋（６）
の製造を行い、螺旋（６）を連続的に製造するものであ
る。そして巻き取りローラ（２）から取り外された螺旋
（６）の一端側にある２本の被覆線（１）の一端からニ
ッケル線（１ａ）を露出させ、これら２本のニッケル線
（１ａ）の露出端部を結線して１本化すると共に、螺旋
（６）の他端側にある２本の被覆線（１）の他端から１
本化されたニッケル線（１ａ）の両端を露出させ、１本
化されたニッケル線（１ａ）の露出両端部に給電用端子
（７）を半田付け固定する。Next, the two covered wires (1) are cut between the winding roller (2) and the feed roller (4) by a cutting mechanism (not shown), and the spiral (6) is drawn by a spiral pushing mechanism (not shown). Push the upper end of the lower part of the spiral (6) from the winding roller (2) and remove the spiral (6).
And the spiral (6) is continuously manufactured. Then, the nickel wire (1a) is exposed from one end of the two covered wires (1) on one end side of the spiral (6) removed from the winding roller (2), and the two nickel wires (1a) are exposed. The exposed ends are connected to make one, and one end from the other ends of the two covered wires (1) on the other end of the spiral (6).
The both ends of the nickel wire (1a) are exposed, and the power supply terminal (7) is soldered and fixed to the exposed ends of the nickel wire (1a).

【００１７】上記の製造方法によって、図３及び図４及
び図５に示すように、ニッケル線（１ａ）を内蔵したポ
リエチレン製の被覆線（１）からなる螺旋（６）の隣接
する被覆線（１）同志を、螺旋（６）の外面の全面で、
融着し離れないように固定し、且つ２個１組の給電用端
子（７）が一端側に位置するジョイント用スリーブ（６
Ａ）の製品が得られる。図３及び図４及び図５におい
て、符号（８）は被覆線融着部を示す。According to the above manufacturing method, as shown in FIG. 3, FIG. 4 and FIG. 5, a spiral wire (6) composed of a polyethylene wire (1) containing a nickel wire (1a) is adjacent to a wire (6). 1) Comrades on the entire outer surface of spiral (6)
A joint sleeve (6) which is fixed so as not to be fused and separated, and a pair of power supply terminals (7) are located at one end side.
The product of A) is obtained. In FIGS. 3, 4 and 5, reference numeral (8) indicates a covered wire fusion bonding portion.

【００１８】また、図６及び図７に示すように、上記ジ
ョイント用スリーブ（６Ａ）の製造に用いた熱板（５）
に変えて、巻き取りローラ（２）の外面に嵌着する熱筒
（５ａ）を外部熱器具として用い、巻き取りローラ
（２）の表面となる熱筒（５ａ）の表面に、上記ジョイ
ント用スリーブ（６Ａ）の製造と同様に、２本の被覆線
（１）を隙間が生じないように密着させた状態で所定長
さ螺旋状に巻き取り、その螺旋（６）の内面全面を熱筒
（５ａ）に接触させた状態で、その熱筒（５ａ）を被覆
線（１）の被覆材の溶融温度以上の所定温度に所定時間
加熱（電気加熱）し、螺旋（６）の内面の被覆材を全面
的に加熱溶融させて融着させ、螺旋（６）の隣接する被
覆線（１）同志を離れないように固定する。この後、上
記ジョイント用スリーブ（６Ａ）の製造と同様に、巻き
取りローラ（２）から螺旋（６）を取り外し、取り外さ
れた螺旋（６）の２本の被覆線（１）のニッケル線（１
ａ）の１本化及び１本化されたニッケル線（１ａ）両端
への給電用端子（７）の取り付けを行う。As shown in FIGS. 6 and 7, the hot plate (5) used for manufacturing the joint sleeve (6A) is used.
Instead of using the heating cylinder (5a) fitted on the outer surface of the winding roller (2) as an external heating device, the surface of the heating cylinder (5a) serving as the surface of the winding roller (2) is mounted on the surface of the heating cylinder (5a). As in the manufacture of the sleeve (6A), the two covered wires (1) are spirally wound for a predetermined length in a state where they are closely adhered so as not to form a gap, and the entire inner surface of the spiral (6) is heated by a hot tube. In a state where the heating tube (5a) is in contact with (5a), the heating tube (5a) is heated (electrically heated) to a predetermined temperature equal to or higher than the melting temperature of the covering material of the covered wire (1) for a predetermined time (coating), thereby coating the inner surface of the spiral (6). The material is heated and melted over the entire surface and fused, and the spiral (6) is fixed so that the adjacent coated wires (1) are not separated from each other. Thereafter, the spiral (6) is removed from the winding roller (2) in the same manner as in the production of the joint sleeve (6A), and the nickel wire (2) of the two covered wires (1) of the removed spiral (6) is removed. 1
The power supply terminals (7) are attached to both ends of the unified nickel wire (1a) of the unified nickel wire (1a).

【００１９】上記他の製造方法によって、図８及び図９
に示すように、ニッケル線（１ａ）を内蔵したポリエチ
レン製の被覆線（１）からなる螺旋（６）の隣接する被
覆線（１）同志を、螺旋（６）の内面の全面で、融着し
離れないように固定し、且つ２個１組の給電用端子
（７）が一端側に位置する他のジョイント用スリーブ
（６Ｂ）の製品が得られる。図８及び図９において、符
号（９）は被覆線融着部を示す。FIGS. 8 and 9 show another manufacturing method.
As shown in the figure, adjacent spiral wires (1) of a spiral (6) composed of a polyethylene coated wire (1) containing a nickel wire (1a) are fused together over the entire inner surface of the spiral (6). A product of another joint sleeve (6B) which is fixed so as not to be separated from each other and in which a pair of power supply terminals (7) are located at one end side is obtained. In FIGS. 8 and 9, reference numeral (9) indicates a covered wire fusion bonding portion.

【００２０】さらに、上記ジョイント用スリーブ（６
Ａ）の製造に用いた熱板（５）と上記他のジョイント用
スリーブ（６Ｂ）の製造に用いた熱筒（５ａ）の両方を
外部熱器具として用い、螺旋（６）の内面の被覆材を熱
筒（５ａ）によって全面的に加熱溶融させて融着させた
後、螺旋（６）の外面の被覆材を熱板（５）によって全
面的に加熱溶融させて融着させ（その逆でも可能）、そ
の他は各ジョイント用スリーブ（６Ａ）及び（６Ｂ）と
同様の製造工程を行うことによって、ニッケル線（１
ａ）を内蔵したポリエチレン製の被覆線（１）からなる
螺旋（６）の隣接する被覆線（１）同志を、螺旋（６）
の外面と内面の両面の全面で、融着し離れないように固
定し、且つ２個１組の給電用端子（７）が一端側に位置
する他のジョイント用スリーブ（６ＡＢ）の製品が得ら
れる。Further, the joint sleeve (6)
Both the hot plate (5) used in the production of A) and the hot cylinder (5a) used in the production of the above-mentioned other joint sleeve (6B) are used as external heating devices, and a coating material for the inner surface of the spiral (6) is used. Is entirely heated and fused by the hot cylinder (5a) and fused, and then the coating material on the outer surface of the spiral (6) is entirely heated and fused by the hot plate (5) and fused (or vice versa). Possible), and the others, by performing the same manufacturing process as the sleeves (6A) and (6B) for the joints, to obtain nickel wires (1).
The spiral (6) consisting of a polyethylene covered wire (1) containing a) is connected to the adjacent covered wire (1) by a spiral (6).
A product of another joint sleeve (6AB) in which the two sets of power supply terminals (7) are located on one end side is fixed on the entire surface of both the outer surface and the inner surface so as not to separate. Can be

【００２１】上記のジョイント用スリーブ（６Ａ）又は
（６Ｂ）又は（６ＡＢ）の製造方法は、螺旋（６）を１
個ずつ製造する方法を記載したが、例えば１０個分の長
さを有する長尺螺旋を形成し、その長尺螺旋の被覆線同
志を融着し、離れないように固定し、巻き取りローラ
（２）から取り外した後、長尺螺旋を１０等分に切断す
るようにしても良い。The method of manufacturing the above-mentioned joint sleeve (6A) or (6B) or (6AB) is as follows.
Although the method of manufacturing the individual pieces has been described, for example, a long spiral having a length of ten pieces is formed, and the coated wires of the long spiral are fused together, fixed so as not to separate, and taken up by a winding roller ( After removing from 2), the long spiral may be cut into 10 equal parts.

【００２２】図１０において、符号（１０）はガスや水
道の配管として用いられている熱可塑性高分子材料であ
るポリエチレン製の管、（１１）はエレクトロフュージ
ョン継手であり、この継手（１１）は継手本体の成型金
型の中に、上記ジョイント用スリーブ（６Ａ）又は（６
Ｂ）又は（６ＡＢ）をインサートし、その金型の中に流
動状態のポリエチレン樹脂を圧入して継手本体を射出成
形することによって製造され、各管差し込み口の内面に
それぞれ別個にジョイント用スリーブ（６Ａ）又は（６
Ｂ）又は（６ＡＢ）が一体に埋め込まれた熱可塑性高分
子材料であるポリエチレン製の継手となり、継手（１
１）の管差し込み口に接続する管（１０）の端部を差し
込むことによって、管（１０）と継手（１１）の嵌合部
にジョイント用スリーブ（６Ａ）又は（６Ｂ）又は（６
ＡＢ）が介在される。In FIG. 10, reference numeral (10) denotes a polyethylene pipe which is a thermoplastic polymer material used as a gas or water pipe, and (11) denotes an electrofusion joint. The joint sleeve (6A) or (6
B) or (6AB) is manufactured by press-fitting a polyethylene resin in a fluid state into the mold thereof and injection-molding the joint body, and the joint sleeves are separately formed on the inner surface of each pipe insertion port. 6A) or (6
B) or a joint made of polyethylene which is a thermoplastic polymer material in which (6AB) is integrally embedded.
By inserting the end of the pipe (10) to be connected to the pipe insertion port of 1), the joint sleeve (6A) or (6B) or (6) is inserted into the fitting portion between the pipe (10) and the joint (11).
AB) is interposed.

【００２３】ジョイント用スリーブ（６Ａ）又は（６
Ｂ）又は（６ＡＢ）を内面に一体に設けたエレクトロフ
ュージョン継手（１１）は主に小及び中口径の管（１
０）の接続に用いられ、大口径の管を接続する場合のエ
レクトロフュージョン継手は、ジョイント用スリーブ
（６Ａ）又は（６Ｂ）又は（６ＡＢ）を嵌め込む溝を継
手本体の各管差し込み口の内面に設け、ジョイント用ス
リーブ（６Ａ）又は（６Ｂ）又は（６ＡＢ）を継手本体
と別体で取り扱うようになっている。継手本体は押し出
し成形された管材を継手長さに切断し、その内面にジョ
イント用スリーブ（６Ａ）又は（６Ｂ）又は（６ＡＢ）
を嵌め込む溝を切削形成することによって製造される。
この継手本体の内面溝にジョイント用スリーブ（６Ａ）
又は（６Ｂ）又は（６ＡＢ）を嵌め込み、給電端子を管
差し込み口から外側に引き出した状態で、継手の管差し
込み口に接続する管の端部を差し込むことによって、管
と継手の嵌合部にジョイント用スリーブ（６Ａ）又は
（６Ｂ）又は（６ＡＢ）が介在される。The joint sleeve (6A) or (6
The electrofusion joint (11) in which B) or (6AB) is integrally provided on the inner surface is mainly used for small and medium-diameter pipes (1).
The electrofusion joint used to connect a large-diameter pipe, which is used for the connection of 0), has a groove in which a joint sleeve (6A) or (6B) or (6AB) is fitted. The joint sleeve (6A) or (6B) or (6AB) is handled separately from the joint body. The joint body cuts the extruded tubing into joint lengths and has a joint sleeve (6A) or (6B) or (6AB) on the inner surface.
It is manufactured by cutting and forming a groove into which the is fitted.
Sleeve for joint (6A) in the inner groove of this joint body
Or, (6B) or (6AB) is fitted, and in a state where the power supply terminal is pulled out from the pipe insertion port, the end of the pipe connected to the pipe insertion port of the joint is inserted into the fitting section of the pipe and the joint. The joint sleeve (6A) or (6B) or (6AB) is interposed.

【００２４】また、ジョイント用スリーブ（６Ａ）又は
（６Ｂ）又は（６ＡＢ）は、管の端部外面に嵌合して継
手に差し込むことによって、管と継手の嵌合部に介在さ
れる。Further, the joint sleeve (6A) or (6B) or (6AB) is interposed in the fitting portion between the pipe and the joint by being fitted to the outer surface of the end of the pipe and being inserted into the joint.

【００２５】上記のように、小口径管である管（１０）
と大口径管である継手（１１）との嵌合部に介在された
ジョイント用スリーブ（６Ａ）又は（６Ｂ）又は（６Ａ
Ｂ）のニッケル線（１ａ）に通電することによって、管
（１０）外面と継手（１１）内面の樹脂を加熱溶融さ
せ、管（１０）と継手（１１）の融着を行うものであ
る。As described above, the small-diameter pipe (10)
(6A) or (6B) or (6A) for the joint interposed in the fitting portion between the joint and the large-diameter pipe (11).
By energizing the nickel wire (1a) of B), the resin on the outer surface of the tube (10) and the inner surface of the joint (11) is heated and melted, and the tube (10) and the joint (11) are fused.

【００２６】ニッケル線（１ａ）を内蔵したポリエチレ
ン製の被覆線（１）からなる螺旋（６）の隣接する被覆
線（１）同志を、螺旋（６）の外面の全面で、融着し離
れないように固定したジョイント用スリーブ（６Ａ）、
又はニッケル線（１ａ）を内蔵したポリエチレン製の被
覆線（１）からなる螺旋（６）の隣接する被覆線（１）
同志を、螺旋（６）の内面の全面で、融着し離れないよ
うに固定したジョイント用スリーブ（６Ｂ）、又はニッ
ケル線（１ａ）を内蔵したポリエチレン製の被覆線
（１）からなる螺旋（６）の隣接する被覆線（１）同志
を、螺旋（６）の外面と内面の両面の全面で、融着し離
れないように固定したジョイント用スリーブ（６ＡＢ）
は、これらを管（１０）の外面又は継手（１１）の内面
に嵌合した状態で、管（１０）と継手（１１）を嵌合さ
せる際、スリーブ（６Ａ）又は（６Ｂ）又は（６ＡＢ）
内面と管（１０）外面との摺接、又はスリーブ６Ａ）又
は（６Ｂ）又は（６ＡＢ）外面と継手（１０）内面との
摺接によって、螺旋（６）が部分的に乱れ、隣接する被
覆線（１）の間に部分的に隙間を生じ、被覆線（１）、
即ちニッケル線（１ａ）の密度が不均一になることがな
いので、管（１０）と継手（１１）との嵌合部の樹脂を
略均一に加熱することができ、融着不良を起こすことが
ない。尚、ジョイント用スリーブを内面に一体に設けた
エレクトロフュージョン継手の場合は、管と継手を嵌合
させる際には、螺旋が部分的に乱れることはないが、ジ
ョイント用スリーブを金型の中にインサートするときの
操作、また金型の中に流動状態のポリエチレン樹脂を圧
入するときの流入圧等、継手製造時に螺旋が部分的に乱
され、被覆線が均密に巻かれていないジョイント用スリ
ーブを内面に一体に設けたエレクトロフュージョン継手
が製造されるが、本発明のジョイント用スリーブ（６
Ａ）又は（６Ｂ）又は（６ＡＢ）は、継手製造時にも螺
旋（６）が部分的に乱されることがない。Adjacent coated wires (1) of a spiral (6) composed of a polyethylene coated wire (1) containing a nickel wire (1a) are fused and separated over the entire outer surface of the spiral (6). Joint sleeve (6A) fixed so that it is not
Or, a spiral wire (6) consisting of a polyethylene wire (1) containing a nickel wire (1a) and an adjacent wire (1).
A joint sleeve (6B) which is fixed so as not to be separated from the whole surface of the inner surface of the spiral (6) or a spiral formed of a polyethylene covered wire (1) containing a nickel wire (1a). 6) A joint sleeve (6AB) in which the adjacent covered wires (1) are fused and fixed so as not to be separated from each other over the entire outer surface and inner surface of the spiral (6).
When fitting the tube (10) and the joint (11) in a state where these are fitted to the outer surface of the tube (10) or the inner surface of the joint (11), the sleeve (6A) or (6B) or (6AB) )
Due to the sliding contact between the inner surface and the outer surface of the pipe (10), or the sliding contact between the outer surface of the sleeve 6A) or (6B) or (6AB) and the inner surface of the joint (10), the spiral (6) is partially disturbed, and the adjacent coating is formed. A gap is partially formed between the wires (1), and the covered wires (1),
That is, since the density of the nickel wire (1a) does not become non-uniform, the resin at the fitting portion between the pipe (10) and the joint (11) can be heated substantially uniformly, and poor fusion occurs. There is no. In the case of an electrofusion joint in which the joint sleeve is integrally provided on the inner surface, when the tube and the joint are fitted, the spiral is not partially disturbed, but the joint sleeve is placed in the mold. Spiral is partially disturbed at the time of joint production, such as the operation at the time of insertion and the inflow pressure when pressurizing the flowing polyethylene resin into the mold, and the coated sleeve is not densely wound with the covered wire. Is manufactured integrally on the inner surface of the joint.
In (A) or (6B) or (6AB), the helix (6) is not partially disturbed during the production of the joint.

【００２７】[0027]

【発明の効果】以上実施例から明らかなように、本発明
のジョイント用スリーブは、線状発熱体を内蔵した熱可
塑性高分子材料被覆線からなる螺旋の隣接する被覆線同
志を、螺旋の外面又は内面又はその両面の全面で、融着
し離れないように固定したものであるから、小口径管と
大口径管を嵌合させる際、スリーブ内面と小口径管外面
との摺接又はスリーブ外面と大口径管内面との摺接によ
って、螺旋が部分的に乱れ、隣接する被覆線の間に部分
的に隙間を生じ、被覆線の密度が不均一になることがな
いので、小口径管外面と大口径管内面の樹脂を略均一に
加熱することができ、融着不良を起こすことがない効果
を奏する。As is apparent from the above embodiments, the joint sleeve according to the present invention has a structure in which a spiral formed of a thermoplastic polymer material-containing wire having a built-in linear heating element is connected to each other with the outer surface of the spiral. Or, it is fixed so as not to be fused and separated on the whole surface of the inner surface or both surfaces, so when fitting the small diameter tube and the large diameter tube, the sliding contact between the sleeve inner surface and the small diameter tube outer surface or the sleeve outer surface The spiral contact is partially disturbed by sliding contact with the inner surface of the large-diameter pipe, and a gap is partially formed between adjacent coated wires, so that the density of the coated wires does not become uneven. Thus, the resin on the inner surface of the large-diameter pipe can be heated substantially uniformly, and there is an effect that no defective fusion occurs.

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

【図１】ジョイント用スリーブの製造方法を示す側面説
明図FIG. 1 is an explanatory side view showing a method for manufacturing a joint sleeve.

【図２】ジョイント用スリーブの製造方法を示す平面説
明図FIG. 2 is an explanatory plan view showing a method for manufacturing a joint sleeve.

【図３】ジョイント用スリーブの全体側面図FIG. 3 is an overall side view of a joint sleeve.

【図４】ジョイント用スリーブの全体平面図FIG. 4 is an overall plan view of a joint sleeve.

【図５】ジョイント用スリーブの断面図FIG. 5 is a sectional view of a joint sleeve.

【図６】他のジョイント用スリーブの製造方法を示す側
面説明図FIG. 6 is an explanatory side view showing a method for manufacturing another joint sleeve.

【図７】他のジョイント用スリーブの製造方法を示す平
面説明図FIG. 7 is an explanatory plan view showing a method for manufacturing another joint sleeve.

【図８】他のジョイント用スリーブの全体平面図FIG. 8 is an overall plan view of another joint sleeve.

【図９】他のジョイント用スリーブの断面図FIG. 9 is a sectional view of another joint sleeve.

【図１０】管類の接続方法を示す全体断面説明図FIG. 10 is an overall sectional explanatory view showing a method of connecting pipes.

【図１１】熱可塑性高分子材料被覆線の説明図FIG. 11 is an explanatory view of a thermoplastic polymer material-coated wire.

【符号の説明】[Explanation of symbols]

（１ａ） ニッケル線（線状発熱体） （１ｂ） 被覆 （１ｃ） 絶縁被膜 （１） 被覆線 （２） 巻き取りローラ （３） 止め具 （４） 送りローラ （５） 熱板（外部熱器具） （５ａ） 熱筒（外部熱器具） （６） 螺旋 （６Ａ） ジョイント用スリーブ （６Ｂ） 他のジョイント用スリーブ （７） 給電用端子 （８） 被覆線融着部 （９） 被覆線融着部 （１０） 管（小口径管） （１１） 継手（大口径管） (1a) Nickel wire (linear heating element) (1b) Coating (1c) Insulating coating (1) Coated wire (2) Winding roller (3) Stopper (4) Feeding roller (5) Hot plate (external heating appliance) (5a) Heat cylinder (external heat appliance) (6) Spiral (6A) Joint sleeve (6B) Other joint sleeve (7) Power supply terminal (8) Coated wire fusion part (9) Coated wire fusion Part (10) Pipe (small diameter pipe) (11) Joint (large diameter pipe)

───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3H019 GA03 JA01 4F211 AA04 AD05 AD12 AG08 AH11 AK09 TA01 TC11 TD07 TD11 TH06 TJ21 TN31  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H019 GA03 JA01 4F211 AA04 AD05 AD12 AG08 AH11 AK09 TA01 TC11 TD07 TD11 TH06 TJ21 TN31

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 線状発熱体を内蔵した熱可塑性高分子材
料被覆線からなる螺旋の隣接する被覆線同志を、螺旋の
外面又は内面又はその両面の全面で、融着し離れないよ
うに固定したことを特徴とするジョイント用スリーブ。1. A spiral made of a thermoplastic polymer material-containing wire having a built-in linear heating element, and adjacent spirally-coated wires are fixed to the entire outer surface or inner surface or both surfaces of the spiral so as not to be separated from each other. A sleeve for a joint, characterized in that: 【請求項２】 線状発熱体を内蔵した熱可塑性高分子材
料被覆線をローラの表面に螺旋状に巻き付ける工程と、
得られた螺旋の外面又は内面又はその両面の全面で被覆
材を外部熱器具によって加熱溶融させ、螺旋の隣接する
被覆線同志を離れないように固定する工程とから成る請
求項１記載のジョイント用スリーブの製造方法。2. A step of helically winding a thermoplastic polymer material-coated wire having a built-in linear heating element around a surface of a roller;
2. The step of heating and melting the coating material on the entire outer surface or inner surface or both surfaces of the obtained spiral with an external heating device, and fixing the spiral so that adjacent coated wires are not separated from each other. The method of manufacturing the sleeve. 【請求項３】 請求項１記載のジョイント用スリーブ
を、熱可塑性高分子材料からなる小口径管と大口径管と
の嵌合部に介在させ、通電によって発熱する材料からな
る線状発熱体に通電して、小口径管外面と大口径管内面
を加熱溶融させて、小口径管と大口径管を融着させる管
類の接続方法。3. A linear heating element made of a material that generates heat when energized by interposing the joint sleeve according to claim 1 in a fitting portion between a small-diameter pipe and a large-diameter pipe made of a thermoplastic polymer material. A method of connecting pipes that energizes and heats and melts the outer surface of the small-diameter tube and the inner surface of the large-diameter tube to fuse the small-diameter tube and the large-diameter tube. 【請求項４】 請求項１記載のジョイント用スリーブ
を、管の外面に設けた管類。4. Pipes provided with the joint sleeve according to claim 1 on an outer surface of the pipe. 【請求項５】 請求項１記載のジョイント用スリーブ
を、管の内面に設けた継手類。5. Joints provided with the joint sleeve according to claim 1 on an inner surface of a pipe.