JP2602577B2 - Method and apparatus for manufacturing double drain pipe made of synthetic resin - Google Patents

Method and apparatus for manufacturing double drain pipe made of synthetic resin

Info

Publication number
JP2602577B2
JP2602577B2 JP2193220A JP19322090A JP2602577B2 JP 2602577 B2 JP2602577 B2 JP 2602577B2 JP 2193220 A JP2193220 A JP 2193220A JP 19322090 A JP19322090 A JP 19322090A JP 2602577 B2 JP2602577 B2 JP 2602577B2
Authority
JP
Japan
Prior art keywords
synthetic resin
pipe
mandrel
strip
drain pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2193220A
Other languages
Japanese (ja)
Other versions
JPH0478519A (en
Inventor
憬宣 松田
Original Assignee
大日本プラスチックス 株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大日本プラスチックス 株式会社 filed Critical 大日本プラスチックス 株式会社
Priority to JP2193220A priority Critical patent/JP2602577B2/en
Publication of JPH0478519A publication Critical patent/JPH0478519A/en
Application granted granted Critical
Publication of JP2602577B2 publication Critical patent/JP2602577B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/18—Pleated or corrugated hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/62—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/003—Tubular articles having irregular or rough surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
    • B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
    • B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
    • B29L2031/602—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements
    • B29L2031/603—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements one placed inside the other, e.g. dual wall tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

【発明の詳細な説明】 （イ）産業上の利用分野 この発明は、合成樹脂二重排水管、その製造方法及び
装置に関し、更に詳しくは地下に埋設され、地下水を排
水するとともに、ケーブルや電線などを通すことができ
る多目的排水管として利用できる合成樹脂製二重排水
管、その製造方法及び装置に関する。The present invention relates to a synthetic resin double drainage pipe, a method and an apparatus for producing the same, and more particularly, it is buried underground to drain groundwater, and also to use cables and electric wires. TECHNICAL FIELD The present invention relates to a synthetic resin double drain pipe that can be used as a multipurpose drain pipe that can pass through, and a method and an apparatus for manufacturing the same.

（ロ）従来の技術及び発明が解決しようとする課題 近年、通信の発達により、地下に埋設した排水管を用
いて電線、ケーブルあるいは光ファイバーなどを挿通す
ることが提案されている。例えば、既設の排水管内に管
の軸方向に沿って等間隔にＵ字状のボルトを取り付け、
そのボルトに電線等を配設することが提案されている。
さらに、既設の排水管内の内面に凸状を設けて、その凸
状の上に電線をのせ、その電線が直接水に触れないよう
にすることも提案されている（実開昭61−103681号参
照）。(B) Problems to be Solved by the Prior Art and the Invention In recent years, with the development of communication, it has been proposed to insert an electric wire, a cable, an optical fiber, or the like using a drain pipe buried underground. For example, U-shaped bolts are attached at equal intervals along the axial direction of the existing drain pipe,
It is proposed to arrange electric wires and the like on the bolt.
Furthermore, it has been proposed to provide a convex shape on the inner surface of an existing drain pipe, place an electric wire on the convex shape, and prevent the electric wire from directly touching the water (Japanese Utility Model Publication No. 61-103681). reference).

しかし、このように排水管内に電線等を挿入した場合
は、依然として水と電線とが直接触れる恐れがあり、電
線に電気的に接続部があればそれに水が侵入して不測の
事故を招く要因となる危険性があった。However, when an electric wire is inserted into the drain pipe in this way, water and the electric wire may still come into direct contact with each other, and if there is an electrically connected part in the electric wire, water may enter it and cause an unexpected accident. There was a risk of becoming.

この発明はこのような不測の事故を防止することを主
目的の一つとするものである。An object of the present invention is to prevent such an unexpected accident.

（ハ）課題を解決するための手段 この発明は、回転するマンドレルの周囲に押出機から
溶融状態の合成樹脂帯状体を供給して一部を重ね合わす
ように螺旋状に捲回し連続して合成樹脂製管を得ること
によりなる合成樹脂製管の製造方法において、前記マン
ドレルとして、そのマンドレルの外周部にマンドレルの
軸方向に平行で外向きに開口する凹溝又はスリットを形
設したものを用い、合成樹脂帯状体を螺旋状に捲回する
に際し、予め成形された小径管を前記凹溝又はスリット
内に着脱可能に保持し、小径管の胴面の一部を、捲回さ
れる合成樹脂帯状体に接合させて、合成樹脂製管の内部
に小径管を一体に固着させた合成樹脂製二重排水管を得
ることによりなる合成樹脂製二重排水管の製造方法を提
供する。(C) Means for Solving the Problems According to the present invention, a synthetic resin strip in a molten state is supplied from an extruder around a rotating mandrel and spirally wound so as to partially overlap with each other to continuously synthesize. In the method of manufacturing a synthetic resin pipe obtained by obtaining a resin pipe, the mandrel having a concave groove or a slit formed in an outer peripheral portion of the mandrel and opening outward in parallel with an axial direction of the mandrel is used. When the synthetic resin strip is spirally wound, a preformed small-diameter pipe is detachably held in the concave groove or the slit, and a part of the body surface of the small-diameter pipe is wound on the synthetic resin. Provided is a method for manufacturing a synthetic resin double drainage pipe obtained by obtaining a synthetic resin double drainage pipe in which a small-diameter pipe is integrally fixed inside a synthetic resin pipe by joining to a belt-like body.

この発明によって得られる合成樹脂製二重排水管は、
外管と、この外管より小径で外管内の内壁に外管とほぼ
平行に一体に固着された内管とからなる。The synthetic resin double drain pipe obtained by the present invention is:
It comprises an outer tube and an inner tube smaller in diameter than the outer tube and fixed integrally to the inner wall of the outer tube substantially parallel to the outer tube.

すなわち、この合成樹脂製二重排水管の特長を単的に
述べれば、外管の内壁に内管を一体に固着することによ
って、排水管内部を２つに区画し、それによって１つの
区画部分に電線、ケーブル等を通しても他の区画部分に
排水を通すことによってその電線の電気的接続部に水が
触れることをなくし、不測の事故を防止しようとするも
のである。That is, if the characteristics of this synthetic resin double drain pipe are simply stated, the inner pipe is integrally fixed to the inner wall of the outer pipe, thereby dividing the inside of the drain pipe into two parts, thereby forming one partition part. The present invention is intended to prevent unexpected accidents by preventing water from coming into contact with the electrical connection portion of the electric wire by draining water through other compartments even through electric wires and cables.

この発明に係る合成樹脂製二重排水管は、特に限定さ
れないが、内管内に電線、ケーブルあるいは光ファイバ
ーが挿通され、内管と外管との間に排水が通される。そ
してこれらの二重排水管は、外管として円筒状のもの
を、内管として断面円筒状、半円状、楕円状又はカマボ
コ断面状のものをものを用いるのが好ましく、内、外管
共に円筒管であることがより好ましく、具体的には内管
の断面積が外管のそれより10〜30％とするのが好まし
い。更に具体的には内管が100〜1200mmφ（外径）に、
外管が300〜3000mmφ（内径）にそれぞれ設定されるの
がより好ましい。また二重排水管の材料としてはポリオ
レフィン系の合成樹脂が好ましく、ポリエチレン樹脂が
より好ましい。Although the synthetic resin double drainage pipe according to the present invention is not particularly limited, an electric wire, a cable or an optical fiber is inserted into the inner pipe, and drainage is passed between the inner pipe and the outer pipe. It is preferable that these double drain pipes use a cylindrical one as an outer pipe, and a cylindrical one, a semicircular one, an elliptical one or a cross section one as an inner pipe. More preferably, it is a cylindrical tube, and more specifically, the cross-sectional area of the inner tube is preferably 10 to 30% of that of the outer tube. More specifically, the inner pipe has a diameter of 100 to 1200 mm (outer diameter),
More preferably, the outer tube is set to 300 to 3000 mmφ (inner diameter). As a material for the double drain pipe, a polyolefin-based synthetic resin is preferable, and a polyethylene resin is more preferable.

なお、内管は、特に限定されないが、外管の中心軸よ
り上位に固着されるのが好ましい。また外管と内管とは
実施例で示すごとく内管のみを予め成形したものを用い
てもよいが、両管共予め成形したものを溶接によって固
着してもよい。The inner tube is not particularly limited, but is preferably fixed above the center axis of the outer tube. The outer tube and the inner tube may be formed by preforming only the inner tube as shown in the embodiment, but the both tubes may be fixed by welding.

この発明は、更に別の観点から、溶融状態の合成樹脂
帯状体を押し出す合成樹脂押出手段と、この押出手段に
より得られる帯状体を螺旋状に捲回しつつ先に捲回した
帯状体の部分に対して後から捲回する帯状体の部分の一
部を重ね合わせ合成樹脂を連続して形成する回転マンド
レル及びその回転駆動手段とを備えた合成樹脂製管の製
造装置において、回転マンドレルは、その外周部に、マ
ンドレルの軸方向に平行で外向きに開口する凹溝又はス
リットを形設し、かつこれらの凹溝又はスリット内に、
予め成形された小径管を着脱可能に保持でき、それによ
って小径管の胴面の一部を捲回される帯状体に接合でき
る保持具を凹溝又はスリットの近傍に具備してなる合成
樹脂製二重排水管の製造装置を提供できる。From another viewpoint, the present invention provides a synthetic resin extruding means for extruding a synthetic resin strip in a molten state, and a spirally wound strip obtained by this extrusion means. On the other hand, in a synthetic resin pipe manufacturing apparatus provided with a rotating mandrel and a rotation driving means for continuously forming a synthetic resin by overlapping a part of a band-shaped body to be wound later, the rotating mandrel is In the outer peripheral portion, a concave groove or a slit that opens outward in parallel with the axial direction of the mandrel is formed, and in these concave grooves or slits,
A synthetic resin made of a synthetic resin having a retainer capable of detachably holding a preformed small-diameter tube and thereby joining a part of the body surface of the small-diameter tube to a wound belt-like body in the vicinity of a groove or a slit. A double drain pipe manufacturing apparatus can be provided.

（ニ）実施例 以下、図に示す実施例に基づいてこの発明を説明す
る。なお、これによってこの発明が限定されるものでは
ない。(D) Embodiment Hereinafter, the present invention will be described based on an embodiment shown in the drawings. Note that the present invention is not limited to this.

まず第１乃至２図において、合成樹脂製二重排水管１
は、円筒状外管２と、この外管内の天井壁に外管とほぼ
平行に一体に固着された円筒状内管３とからなる。First, in FIG. 1 and FIG.
Consists of a cylindrical outer tube 2 and a cylindrical inner tube 3 integrally fixed to a ceiling wall inside the outer tube almost in parallel with the outer tube.

以上のような構成の二重排水管１は、同一構成の他の
複数の排水管、例えば第７図のごとく、同一構成のもう
１つの排水管1aと、二つ割りの継ぎ手5,6を締結部材7,8
により締結して連結され土壌中に埋設使用される。The double drain pipe 1 having the above-described structure is formed by connecting a plurality of other drain pipes having the same configuration, for example, another drain pipe 1a having the same configuration and the split joints 5 and 6 as shown in FIG. 7,8
And buried in soil.

かくして、外管２の内管３との間に排水を内管３内に
被覆電線４を挿通することにすれば、被覆電線に電気的
接続部があっても、排水が触れるのを防止でき、不測の
事故を防止できる。なお二重排水管１ともうひとつの二
重排水管1aとの間は継ぎ手5,6によって接合されている
わけであるが、両排水管の内管は単に突き合わされてい
るだけであって、かならずしも、水に対してシールされ
ているわけではない。しかし、ほとんどの場合、排水が
内管の位置まで増水することがないように、外管の径を
設定しているので、被覆電線４と排水とが接触すること
を防ぐことができる。もちろん、内管の一方端部に拡径
部を形成し、その拡径部に内管の他方端部を挿入し、シ
ールするようにしてもよい。Thus, if drainage is inserted between the outer pipe 2 and the inner pipe 3 and the covered electric wire 4 is inserted into the inner pipe 3, even if the covered electric wire has an electrical connection portion, the drainage can be prevented from touching. , Accidents can be prevented. Although the double drain pipe 1 and another double drain pipe 1a are joined by the joints 5, 6, the inner pipes of both drain pipes are merely butted, It is not necessarily sealed against water. However, in most cases, since the diameter of the outer pipe is set so that the drainage does not increase to the position of the inner pipe, it is possible to prevent the covered electric wire 4 from contacting the drainage. Of course, an enlarged portion may be formed at one end of the inner tube, and the other end of the inner tube may be inserted into the enlarged portion and sealed.

以上の実施例とは異なり、第３乃至４図のごとく、二
重排水管11の一端部、つまり外管12の一端部に拡径部19
を形成し、第５乃至第６図のごとく、他の同一構成の排
水管11aと接続することができる。なお、第３〜６回に
おいて13は内管、第５図において18は弾性材料からなる
シール材である。Unlike the above embodiment, as shown in FIGS. 3 and 4, one end of the double drain pipe 11, that is, one end of the outer pipe 12, has an enlarged diameter portion 19.
And can be connected to another drain pipe 11a having the same configuration as shown in FIGS. 5 and 6. In the third to sixth times, reference numeral 13 denotes an inner tube, and in FIG. 5, reference numeral 18 denotes a sealing material made of an elastic material.

更に以上の実施例とは異なり、第11〜14図のごとく、
二重排水管21、21aの外管22、22aの表面に螺旋状の凸状
27、27aをそれぞれ形成することもできる。なお、23、2
3aは内管、28は弾性材料からなるシール材、29は拡径部
である。Further, unlike the above embodiment, as shown in FIGS. 11 to 14,
Spiral convex on the surface of the outer pipe 22, 22a of the double drain pipe 21, 21a
27 and 27a can also be formed respectively. 23, 2
3a is an inner tube, 28 is a sealing material made of an elastic material, and 29 is an enlarged diameter portion.

次に以上の構成を備えた二重排水管１の製造方法及び
装置を説明する。Next, a method and an apparatus for manufacturing the double drain pipe 1 having the above configuration will be described.

まず第９図において、装置70は、溶融状体の合成樹脂
帯状体56を押し出す合成樹脂押出機58と、この押出機に
より得られる帯状体56を螺旋状に捲回しつつ先に捲回し
た帯状体56の一部を重ね合わせて外管を構成し、かつ予
め保持した内管、つまり小径管（第９図では省略、第８
図参照）を一体に連結し、最終的に二重排水管を形成す
る回転マンドレル41とから主としてなる。First, in FIG. 9, a device 70 comprises a synthetic resin extruder 58 for extruding a synthetic resin strip 56 in a molten state, and a strip formed by spirally winding the strip 56 obtained by the extruder. An outer tube is formed by superposing a part of the body 56 and an inner tube, that is, a small diameter tube (omitted in FIG. 9;
(See the figure), and a rotating mandrel 41 that finally forms a double drain pipe.

押出機58は、台車68上に設置され、床上を車輪67,67a
で回転マンドレル41の軸方向に平行に走行可能である。
なお、69はその走行用モータ、60は床のレール、59は原
料供給口、71は溶融状態の合成樹脂帯状体56を回転マン
ドレル41に押圧するための押圧ロール、57はダイであ
る。The extruder 58 is installed on a trolley 68, and wheels 67, 67a are placed on the floor.
And can run parallel to the axial direction of the rotating mandrel 41.
Reference numeral 69 denotes a traveling motor, reference numeral 60 denotes a floor rail, reference numeral 59 denotes a raw material supply port, reference numeral 71 denotes a pressing roll for pressing the molten synthetic resin strip 56 against the rotating mandrel 41, and reference numeral 57 denotes a die.

一方、回転マンドレル41は、その軸44を受ける受け部
分55がローラ62,63で支持され、ローラ63が架台61上に
設置されたサーボモータ66よりベルト65を介して回転動
力を受けて上記受け部分55を介して回転マンドレル41を
回転させる。なお、押出機は、以上の実施例とは異な
り、固定され、回転マンドレルは製造対象の管の軸方向
に平行に移動できるように配設されてもよい。On the other hand, in the rotating mandrel 41, a receiving portion 55 for receiving the shaft 44 is supported by rollers 62 and 63, and the roller 63 receives rotational power via a belt 65 from a servo motor 66 installed on a gantry 61 to receive the receiving force. The rotating mandrel 41 is rotated via the part 55. The extruder may be fixed, unlike the above embodiments, and the rotating mandrel may be arranged so as to be movable in parallel to the axial direction of the pipe to be manufactured.

次いで、第８乃至10図において、回転マンドレル41に
は、その表面に長手方向に沿って凹溝45を形設し、この
凹溝内に予め成形された内管51が挿入保持される。49・
50は蝶つがいであって、折り込み部材42・43を油圧シリ
ンダー47・47aによってそれぞれ折り曲げ可能に構成し
ている。なお、ホルダー締付部材であり、ハンドル53・
53aとネジ軸54・54aとからなる。48は油圧シリンダー47
・47a固定用のステーである。内管51を凹溝45内に固定
する方法については、特に第10図において、両側からホ
ルダー52・52aをハンドル53・53aによってネジ軸54・54
aを介して内管51に押し付けるとによって固定してい
る。ここで内管51は、その胴面の一部がマンドレルの外
表面から若干突出するように位置されている。8 to 10, in the rotary mandrel 41, a groove 45 is formed in the surface thereof along the longitudinal direction, and an inner tube 51 formed in advance is inserted and held in the groove. 49 ・
A hinge 50 is provided so that the folding members 42 and 43 can be bent by hydraulic cylinders 47 and 47a, respectively. In addition, it is a holder fastening member,
53a and screw shafts 54a. 48 is a hydraulic cylinder 47
・ A stay for fixing 47a. Regarding the method of fixing the inner tube 51 in the concave groove 45, particularly in FIG. 10, the holders 52, 52a are screwed from both sides by the handle shafts 53, 53a from both sides.
It is fixed by pressing against the inner tube 51 via a. Here, the inner tube 51 is positioned so that a part of its body surface slightly protrudes from the outer surface of the mandrel.

このように内管51を所定の位置に支持した回転マンド
レル41は、回転すると、押出機58から帯状に押し出され
る溶融合成樹脂が回転マンドレル41の表面に一部を重ね
合わすように螺旋状に巻き付けられ、外管を形成する。
この際、外管は内管の一部と接触し一体融着され、最終
的に二重排水管として得られる。When the rotating mandrel 41 supporting the inner tube 51 at a predetermined position as described above is rotated, the molten synthetic resin extruded in a belt shape from the extruder 58 is spirally wound so as to partially overlap the surface of the rotating mandrel 41. To form an outer tube.
At this time, the outer pipe comes into contact with a part of the inner pipe and is integrally fused, and is finally obtained as a double drain pipe.

なお、得られる二重排水管を回転マンドレル41から分
離するには、特に第８図（Ｂ）において、折り込み部43
を蝶番49を中心に油圧シリンダ47aによって内側へ折り
込み、更にその折り込みによって形成された空間を利用
して蝶番50を中心にもう１つの折り込み部材42を油圧シ
リンダ47によって内側へ折り込む。このように回転マン
ドレル41の断面形状を縮小させることによって、第１〜
２図に示すごとき、二重排水管を軸方向に抜き出すわけ
である。In order to separate the obtained double drain pipe from the rotating mandrel 41, in particular, in FIG.
Is folded inward by a hydraulic cylinder 47a around a hinge 49, and another folding member 42 is folded inward by a hydraulic cylinder 47 around a hinge 50 by utilizing the space formed by the folding. By reducing the cross-sectional shape of the rotating mandrel 41 in this manner,
As shown in FIG. 2, the double drain pipe is drawn out in the axial direction.

（ホ）発明の効果 この発明によれば、外管の内壁に内管を一体に固着す
ることによって、排水管内部を２つに区画し、それによ
って１つの区画部分に電線、ケーブル等を通しても他の
区画部分に排水を通すことによってその電線の電気的接
続部に水が触れることをなくし、不測の事故を防止しよ
うとするものである。(E) Effect of the Invention According to the present invention, the inner pipe is integrally fixed to the inner wall of the outer pipe, thereby dividing the inside of the drain pipe into two sections. By draining the water through the other compartments, the electrical connection of the electric wire is prevented from coming into contact with water, thereby preventing an accident.

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

第１図はこの発明にかかる合成樹脂製二重排水管の一実
施例を示す側面図、第２図はそのＡ−Ａ断面図、第３図
は他の実施例を示す第１図相当図、第４図は同じく第２
図相当図、第５図は第４図に示す二重排水管の接続状態
を示す断面図、第６図は同じく説明斜視図、第７図は第
１図の二重排水管を異なる継ぎ手を用いて接続した状態
を示す斜視図、第８図（Ａ）はマンドレルの構成を示す
概略構成説明図、第８図（Ｂ）はマンドレルの異なる状
態を説明する第８図（Ａ）前面相当図、第９図は二重排
水管の製造装置の概略構成説明図、第10図は第８図の要
部拡大図、第11図は異なる実施例を示す第１図相当図、
第12図は同じく第２図相当図、第13図は同じく第５図相
当図、第14図は同じく第６図相当図である。 １……合成樹脂製二重排水管、２……外管、 ３……内管。FIG. 1 is a side view showing one embodiment of a synthetic resin double drainage pipe according to the present invention, FIG. 2 is a sectional view taken along line AA, and FIG. 3 is a diagram corresponding to FIG. 1 showing another embodiment. FIG. 4 shows the second
FIG. 5 is a sectional view showing the connection state of the double drainage pipe shown in FIG. 4, FIG. 6 is a perspective view for explaining the same, and FIG. FIG. 8 (A) is a schematic configuration explanatory view showing a configuration of a mandrel, and FIG. 8 (B) is a front view corresponding to FIG. 8 (A) illustrating a different state of the mandrel. , FIG. 9 is a schematic configuration explanatory view of a double drain pipe manufacturing apparatus, FIG. 10 is an enlarged view of a main part of FIG. 8, FIG. 11 is a diagram corresponding to FIG.
12 is a diagram corresponding to FIG. 2, FIG. 13 is a diagram corresponding to FIG. 5, and FIG. 14 is a diagram corresponding to FIG. 1 ... double drain pipe made of synthetic resin, 2 ... outer pipe, 3 ... inner pipe.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−257028（ＪＰ，Ａ) 特開 昭60−232926（ＪＰ，Ａ) 特開 昭63−56431（ＪＰ，Ａ) 特開 昭63−272531（ＪＰ，Ａ) 特開 昭62−103127（ＪＰ，Ａ) 特開 昭63−15735（ＪＰ，Ａ) 実開 昭63−68423（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A 1-257028 (JP, A) JP-A 60-232926 (JP, A) JP-A 63-56431 (JP, A) JP-A 63-564 272531 (JP, A) JP-A-62-103127 (JP, A) JP-A-63-15735 (JP, A) JP-A 63-68423 (JP, U)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】回転するマンドレルの周囲に押出機から溶
融状態の合成樹脂帯状体を供給して一部を重ね合わすよ
うに螺旋状に捲回し連続して合成樹脂製管を得ることに
よりなる合成樹脂製管の製造方法において、 前記マンドレルとして、そのマンドレルの外周部にマン
ドレルの軸方向に平行で外向きに開口する凹溝又はスリ
ットを形設したものを用い、 合成樹脂帯状体を螺旋状に捲回するに際し、予め成形さ
れた小径管を前記凹溝又はスリット内に着脱可能に保持
し、小径管の胴面の一部を、捲回される合成樹脂帯状体
に接合させて、合成樹脂製管の内部に小径管を一体に固
着させた合成樹脂製二重排水管を得ることによりなる合
成樹脂製二重排水管の製造方法。1. A synthetic method comprising supplying a synthetic resin strip in a molten state from an extruder around a rotating mandrel, spirally winding the synthetic resin strip so as to partially overlap one another, and continuously obtaining a synthetic resin pipe. In the method for manufacturing a resin pipe, the mandrel is formed by forming a concave groove or a slit in an outer peripheral portion of the mandrel, which is parallel to the axial direction of the mandrel and opens outward, and the synthetic resin strip is spirally formed. Upon winding, a preformed small diameter pipe is detachably held in the concave groove or slit, and a part of the body surface of the small diameter pipe is joined to the synthetic resin strip to be wound. A method for producing a synthetic resin double drain pipe comprising obtaining a synthetic resin double drain pipe in which a small-diameter pipe is integrally fixed inside a pipe. 【請求項２】溶融状態の合成樹脂帯状体を押し出す合成
樹脂押出手段と、この押出手段により得られる帯状体を
螺旋状に捲回しつつ先に捲回した帯状体の部分に対して
後から捲回する帯状体の部分の一部を重ね合わせ合成樹
脂管を連絶して形成する回転マンドレル及びその回転駆
動手段とを備えた合成樹脂製管の製造装置において、 回転マンドレルは、その外周部に、マンドレルの軸方向
に平行で外向きに開口する凹溝又はスリットを形設し、
かつこれらの凹溝又はスリット内に、予め成形された小
径管を着脱可能に保持でき、それによって小径管の胴面
の一部を捲回される帯状体に接合できる保持具を凹溝又
はスリットの近傍に具備してなる合成樹脂製二重排水管
の製造装置。2. A synthetic resin extruding means for extruding a synthetic resin strip in a molten state, and a strip obtained by this extruding means being spirally wound and a part of the previously wound strip being wound later. In a synthetic resin pipe manufacturing apparatus provided with a rotating mandrel and a rotation driving means for forming a continuous synthetic resin pipe by overlapping a part of a rotating belt-like body, the rotating mandrel is provided on an outer peripheral portion thereof. , Forming a concave groove or slit that opens parallel and outward to the axial direction of the mandrel,
In addition, a holding tool capable of detachably holding a preformed small-diameter pipe in these grooves or slits, and thereby joining a part of the body surface of the small-diameter pipe to the rolled strip is provided with a groove or slit. An apparatus for manufacturing a synthetic resin double drainage pipe, which is provided in the vicinity of the above.
JP2193220A 1990-07-20 1990-07-20 Method and apparatus for manufacturing double drain pipe made of synthetic resin Expired - Fee Related JP2602577B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2193220A JP2602577B2 (en) 1990-07-20 1990-07-20 Method and apparatus for manufacturing double drain pipe made of synthetic resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2193220A JP2602577B2 (en) 1990-07-20 1990-07-20 Method and apparatus for manufacturing double drain pipe made of synthetic resin

Publications (2)

Publication Number Publication Date
JPH0478519A JPH0478519A (en) 1992-03-12
JP2602577B2 true JP2602577B2 (en) 1997-04-23

Family

ID=16304314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2193220A Expired - Fee Related JP2602577B2 (en) 1990-07-20 1990-07-20 Method and apparatus for manufacturing double drain pipe made of synthetic resin

Country Status (1)

Country Link
JP (1) JP2602577B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040038431A (en) * 2002-11-01 2004-05-08 이순재 The hose with electric wire and their manufacturing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01257028A (en) * 1988-04-06 1989-10-13 Takiron Co Ltd Pipe line forming method and tubular body possessing a plurality of pipe lines

Also Published As

Publication number Publication date
JPH0478519A (en) 1992-03-12

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