JPH11108258A - Pipe having inner circumferential groove and manufacture thereof - Google Patents

Pipe having inner circumferential groove and manufacture thereof

Info

Publication number
JPH11108258A
JPH11108258A JP27318097A JP27318097A JPH11108258A JP H11108258 A JPH11108258 A JP H11108258A JP 27318097 A JP27318097 A JP 27318097A JP 27318097 A JP27318097 A JP 27318097A JP H11108258 A JPH11108258 A JP H11108258A
Authority
JP
Japan
Prior art keywords
pipe
groove
channel
resin pipe
tube
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.)
Pending
Application number
JP27318097A
Other languages
Japanese (ja)
Inventor
Yuji Nishikawa
裕司 西川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP27318097A priority Critical patent/JPH11108258A/en
Publication of JPH11108258A publication Critical patent/JPH11108258A/en
Pending legal-status Critical Current

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  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PROBLEM TO BE SOLVED: To correctly finish the angle part of the inner face groove of a pipe into right angles without working after forming the pipe by arranging an annular channel forming the groove on the inner circumference of a resin pipe on the inner circumference of the resin pipe. SOLUTION: An annular channel 6 formed out of different member from the main body of a resin pipe 1 is arranged on the inner circumference of the socket 11 of the resin pipe 1, and a groove 12 is formed out of the channel 6. In this case, projecting parts 63, 64 extending in the axial direction of the pipe are formed outside the angle parts 62, 63 of the channel 6, the outer circumferences of the projecting parts 63, 64 are formed into a taper shape becoming small diameter toward the extreme end side, and the inner circumferential face 6A is formed so as to be flush with the inner circumferential face 11A of the socket 11. When the resin pipe 1 is manufactured, on the outer circumference of a core mold wound with parting material, the separately formed channel 6 is provided, in addition pipe material is wound on the outer circumference of the core mold, and after hardening it, the core mold is drawn out. Hereby, the channel 6 is stuck to the inner circumference and the integrated resin pipe 1 is formed.

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】本発明は内周溝を有する管お
よびその製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube having an inner peripheral groove and a method for manufacturing the same.

【0002】[0002]

【従来の技術】管の一種として、FRP管やFRPM管
などの樹脂管が知られている。そして、これら樹脂管ど
うしを接合するための管継手として、スリップオンタイ
プの管継手が知られている。これは、図6に示すよう
に、一方の樹脂管1の受口11に、この樹脂管1に接合
される他の樹脂管2の挿口22を引き込んで接合するも
のである。受口11の内周には、管継手を封止して水密
性や気密性を保持するためのゴム製の環状のパッキン3
が装着される。このパッキン3は、受口11の内周面に
形成された溝12にはめ込まれる外周突起31を有する
ことで、この受口11の内周に保持される。またパッキ
ン3は、シールのために挿口22の外周に接するリップ
部32を一体に有する。
2. Description of the Related Art As one type of pipe, a resin pipe such as an FRP pipe or an FRPM pipe is known. As a pipe joint for joining these resin pipes, a slip-on type pipe joint is known. As shown in FIG. 6, an insertion port 22 of another resin pipe 2 to be joined to this resin pipe 1 is drawn into and joined to a receiving port 11 of one resin pipe 1. A rubber annular packing 3 for sealing a pipe joint and maintaining watertightness and airtightness is provided on the inner periphery of the receiving port 11.
Is attached. The packing 3 is held on the inner periphery of the receiving port 11 by having an outer peripheral projection 31 fitted into the groove 12 formed on the inner peripheral surface of the receiving port 11. Further, the packing 3 integrally has a lip portion 32 in contact with the outer periphery of the insertion opening 22 for sealing.

【0003】図7は受口11に未だ挿口22が挿入され
ていないときの状態を示すが、この受口11の内部に挿
口22が挿入されて管路に供用され、管内に流体が通さ
れると、受口11の奥側におけるパッキン3の端面33
に内圧Pが作用する。この内圧Pにより、パッキン3を
受口11と挿口22との隙間から外へ押し出そうとする
力が働く。これに対応して溝12は横断面が矩形状に形
成されており、上記の力による押し出しを阻止するため
に、溝12における受口開口側の角部121でパッキン
3を受け止めることになる。
FIG. 7 shows a state in which the insertion port 22 has not yet been inserted into the reception port 11. The insertion port 22 is inserted into the reception port 11 and is used for a pipeline, and a fluid is introduced into the pipe. When passed, the end face 33 of the packing 3 on the back side of the receiving port 11
The internal pressure P acts on. Due to this internal pressure P, a force acts to push the packing 3 out of the gap between the receiving port 11 and the insertion port 22. Correspondingly, the groove 12 has a rectangular cross section, and the packing 3 is received at the corner 121 of the groove 12 on the side of the receiving opening in order to prevent the extrusion by the above-mentioned force.

【0004】また受口11に挿口22を引き込む際にパ
ッキンが受口奥側へずれないように、そのときには溝1
2における受口奥側の角部122でパッキン3を受け止
めなければならない。
In order to prevent the packing from being shifted toward the back of the receiving port when the insertion port 22 is pulled into the receiving port 11, the groove 1
The packing 3 must be received at the corner 122 on the back side of the receiving port in FIG.

【0005】したがって、溝12は、両側の角部12
1、122とも確実に直角に仕上がっている必要があ
る。この溝12を形成するために、通常は、次のような
方法がとられている。すなわち、図8に示すように、管
の受口を形成するための芯型4の外周に、溝12とほぼ
同等の断面形状および断面寸法を有する、たとえばゴム
製の型材5を全周にわたって設置しておき、この型材5
および芯型4の外周にセロファンなどの離型材を巻き、
その外周にFRPやFRPMなどの材料11aを巻いて
これを硬化させる。その後、芯型4を抜き出し、内周側
から型材5を取り去り、さらに所定の位置Aで切断する
ことによって、図9に示される管1が得られる。
Therefore, the groove 12 is formed at the corners 12 on both sides.
Both 1 and 122 must be surely finished at right angles. Usually, the following method is used to form the groove 12. That is, as shown in FIG. 8, for example, a rubber mold member 5 having substantially the same cross-sectional shape and cross-sectional dimension as the groove 12 is installed on the outer periphery of the core mold 4 for forming the socket of the pipe. Keep this shape 5
And a mold release material such as a cellophane is wound around the outer periphery of the core mold 4,
A material 11a such as FRP or FRPM is wound around the outer periphery and cured. Thereafter, the core mold 4 is extracted, the mold material 5 is removed from the inner peripheral side, and further cut at a predetermined position A, thereby obtaining the pipe 1 shown in FIG.

【0006】[0006]

【発明が解決しようとする課題】ところが、管軸宝庫う
に沿った型材5の両端の部分では、上述のように離型材
を巻いていることもあって、この型材5と芯型4との境
界の部分に十分に材料11aを充填するのが困難であ
る。このため、図9に示すように、実際は溝12の両側
の角部121、122が直角に仕上がらず、図示のよう
に丸みを帯びた状態となる。
However, since the mold release material is wound at both ends of the mold material 5 along the pipe shaft as described above, the boundary between the mold material 5 and the core mold 4 is formed. It is difficult to sufficiently fill the portion 11a with the material 11a. For this reason, as shown in FIG. 9, the corners 121 and 122 on both sides of the groove 12 are not actually finished at a right angle but are rounded as shown in the figure.

【0007】しかし、これでは上述のパッキン3を受け
止めるという所期の目的を達成しにくいという問題点が
ある。そこで、管1を成形した後に、角部121、12
2が直角になるようにパテなどで仕上げたり、あるいは
グラインダ加工にによって直角に仕上げたりする必要が
あり、相当の工数を要するという問題点がある。
However, this has a problem that it is difficult to achieve the intended purpose of receiving the packing 3 described above. Then, after forming the pipe 1, the corners 121, 12
2 has to be finished with a putty or the like so as to be a right angle, or has to be finished at a right angle by grinder processing, and there is a problem that considerable man-hours are required.

【0008】そこで本発明は、管成形後の加工を行うこ
となしに管内面溝の角部を正確に直角に仕上げることが
できるようにすることを目的とする。
Accordingly, an object of the present invention is to make it possible to accurately finish the corner of the groove on the inner surface of the pipe without performing any processing after forming the pipe.

【0009】[0009]

【課題を解決するための手段】この目的を達成するため
本発明は、樹脂管の内周に、この樹脂管の内周の溝を形
成する環状の溝型材を配置したものである。
In order to achieve this object, the present invention has an annular groove formed on the inner periphery of the resin tube to form a groove on the inner periphery of the resin tube.

【0010】また本発明は、芯型の外周に、あらかじめ
別途形成しておいた環状の溝型材を設置し、そのうえ
で、前記芯型および溝型材の外周に管材料を供給して、
前記溝型材によって内周溝が形成された管を成形するも
のである。
The present invention also provides an annular groove formed separately in advance on the outer periphery of the core mold, and then supplies a tube material to the outer periphery of the core mold and the groove.
A tube in which an inner peripheral groove is formed by the channel material is formed.

【0011】したがって本発明によると、樹脂管の本体
とは別の部材で構成された溝型材によって内周溝が形成
されるため、この溝型材の角部をあらかじめ直角に形成
しておくことにより、出来上がった管の内面溝の角部
も、後加工を行うことなしに正確に直角に仕上げられる
ことになる。
Therefore, according to the present invention, since the inner peripheral groove is formed by the groove formed of a member different from the main body of the resin pipe, the corners of the groove are formed in advance at right angles. Also, the corners of the inner surface groove of the completed pipe can be accurately finished at a right angle without performing post-processing.

【0012】[0012]

【発明の実施の形態】図1は本発明にもとづく内周溝を
有する管を示す。すなわち樹脂管1の受口11の内周に
は、この樹脂管1の本体とは別の部材で形成された環状
の溝型材6が配置されおり、この溝型材6によって溝1
2が形成されている。61は溝12における受口開口側
の角部、また62は溝12における受口奥側の角部で、
これらの角部61、62は溝型材6によって直角に形成
されている。また溝型材6における角部62、63の外
側には、管軸方向に延びる突出部63、64が形成され
ている。この突出部63、64の外周は、先端側に向か
うにつれ小径となるテーパ状に形成されている。溝型材
6の内周面6Aは、受口11の内周面11Aと面一に形
成されている。
FIG. 1 shows a tube having an inner circumferential groove according to the present invention. That is, on the inner periphery of the receiving port 11 of the resin tube 1, an annular groove member 6 formed of a member different from the main body of the resin tube 1 is arranged.
2 are formed. 61 is a corner of the groove 12 on the opening side of the receptacle, 62 is a corner of the groove 12 on the inner side of the receptacle,
These corners 61 and 62 are formed at right angles by the channel member 6. Projections 63 and 64 extending in the tube axis direction are formed outside the corners 62 and 63 of the channel member 6. The outer circumferences of the protruding portions 63 and 64 are formed in a tapered shape having a smaller diameter toward the distal end side. The inner peripheral surface 6A of the channel member 6 is formed flush with the inner peripheral surface 11A of the receptacle 11.

【0013】このような構成の樹脂管1を製造する際に
は、図2に示すように、離型材を巻いた芯型4の外周
に、あらかじめ別途形成しておいた溝型材6を設置す
る。この溝型材6は、PVCなどの材料にて形成されて
いるのが好適である。そして、このように溝型材6を設
置した芯型4の外周に管材料13aを巻き付け、その後
にこれを硬化させ、さらに芯型4の抜き出しを行う。
When manufacturing the resin tube 1 having such a structure, as shown in FIG. 2, a groove member 6 separately formed in advance is placed on the outer periphery of the core 4 around which the release material is wound. . This channel member 6 is preferably formed of a material such as PVC. Then, the tube material 13a is wound around the outer periphery of the core mold 4 on which the grooved material 6 is installed, and thereafter, it is cured, and the core mold 4 is further extracted.

【0014】このようにすると、図8に示したゴム製の
型材5の場合と異なって、溝型材6の表面には離型材が
巻かれていないので、この溝型材6は管材料13aと密
着し一体化される。このとき、少なくとも溝型材6の周
辺の部分においては、管材料13aとして溝型材6と良
好に接着する材料を用いる必要がある。溝型材6におけ
る角部61、62の外側にはテーパ状の突出部63、6
4が形成されているため、この角部61、62の外側に
おいては管材料13aを空洞なく詰めることができる。
In this case, unlike the case of the rubber mold member 5 shown in FIG. 8, the release member is not wound on the surface of the groove member 6, so that the groove member 6 is in close contact with the tube material 13a. And integrated. At this time, it is necessary to use a material that adheres well to the channel member 6 as the tube material 13a, at least in the periphery of the channel member 6. Outside the corners 61 and 62 of the channel member 6, tapered projections 63 and 6 are provided.
Since the tube 4 is formed, the tube material 13a can be packed without voids outside the corners 61 and 62.

【0015】また、あらかじめ別途形成したおいて溝型
材6が直角な角部61、62を有するため、管成形後の
加工をまったく不要としたうえで、確実にパッキンを受
け止めることができる直角の角部61、62を持った溝
12を形成することができる。
Further, since the channel member 6 is formed separately in advance and has the right-angled corners 61 and 62, the post-molding process is not required at all, and the right-angled corner can reliably receive the packing. The groove 12 having the portions 61 and 62 can be formed.

【0016】図3および図4は、溝型材6の変形例を示
す。すなわち、図1および図2では溝型材6の外周面が
平滑なものを例示したが、図3に示すものでは、管材料
との密着を良好にするために、この管材料との接触面積
を増大させる目的で、溝型材6の外周面にたとえば図示
のように断面が半円状となる多数の突起65が一体に形
成されている。また図4に示すものでは、管材料と機械
的に結合するように、逆テーパとなる多数の突起66が
一体に形成されている。
FIGS. 3 and 4 show a modification of the channel 6. That is, in FIGS. 1 and 2, the channel member 6 has a smooth outer peripheral surface, but in FIG. 3, the contact area with the tube material is reduced in order to improve the close contact with the tube material. For the purpose of increasing, a large number of projections 65 having a semicircular cross section are formed integrally on the outer peripheral surface of the channel member 6 as shown in the figure, for example. Further, in the configuration shown in FIG. 4, a large number of protrusions 66 having an inverse taper are integrally formed so as to be mechanically connected to the tube material.

【0017】図5は、溝型材6のさらなる変形例を示
す。すなわち、パッキン3は複数の外周突起31を備え
ることが可能であり、この図5のものは外周突起31を
二つ有し、それに対応して溝型材6も管軸方向に沿って
大きな寸法で形成され、溝12を二つ有した構成とされ
ている。溝12どうしは連結部67によって互いに連結
され、この連結部67の外周にも突出部63、64と同
様のテーパ面68、69が形成されている。
FIG. 5 shows a further modification of the channel member 6. That is, the packing 3 can be provided with a plurality of outer peripheral projections 31. The packing 3 shown in FIG. 5 has two outer peripheral projections 31, and the channel member 6 has a correspondingly large dimension along the pipe axis direction. And has two grooves 12. The grooves 12 are connected to each other by a connecting portion 67, and tapered surfaces 68 and 69 similar to the protruding portions 63 and 64 are formed on the outer periphery of the connecting portion 67.

【0018】なお、パッキン3は、図5に示すようにリ
ップ部32にてシールを行うようにしたもののほかに、
たとえばOリング形やその他のシール構造を持つもので
あっても差し支えない。また受口11は、図6の従来例
に示すような管1の胴部と一体に成形したいわゆるソケ
ットタイプであっても構わないし、あるいは管の胴部よ
りも口径の大きな別体のカラーをこの胴部の端に外ばめ
したいわゆるカラータイプであっても構わない。
As shown in FIG. 5, the packing 3 is sealed by a lip portion 32 as shown in FIG.
For example, an O-ring type or another type having a sealing structure may be used. The receptacle 11 may be a so-called socket type integrally formed with the body of the tube 1 as shown in the conventional example of FIG. 6, or a separate collar having a larger diameter than the body of the tube. It may be a so-called color type which is fitted to the end of the body.

【0019】[0019]

【発明の効果】以上のように本発明によると、樹脂管の
内周に、この樹脂管の内周の溝を形成する環状の溝型材
を配置したため、、また、芯型の外周に、あらかじめ別
途形成しておいた環状の溝型材を設置し、そのうえで、
前記芯型および溝型材の外周に管材料を供給して、前記
溝型材によって内周溝が形成された管を形成するため、
樹脂管の本体とは別の部材で構成された溝型材によって
内周溝を形成でき、この溝型材の角部をあらかじめ直角
に形成しておくことにより、出来上がった管の内面溝の
角部も、後加工を行うことなしに正確に直角に仕上げる
ことができる。
As described above, according to the present invention, the annular groove forming the inner circumferential groove of the resin pipe is disposed on the inner circumference of the resin pipe. Install the annular groove formed separately, and then
To supply a tube material to the outer periphery of the core mold and the channel material to form a tube in which an inner peripheral groove is formed by the channel material,
The inner peripheral groove can be formed by a groove formed of a member different from the main body of the resin pipe, and by forming the corners of this groove at a right angle in advance, the corners of the inner groove of the completed pipe can be formed. It can be finished at right angles without any post-processing.

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

【図1】本発明の実施の形態の内周溝を有する管の要部
の断面図である。
FIG. 1 is a sectional view of a main part of a pipe having an inner peripheral groove according to an embodiment of the present invention.

【図2】図1の管の製造方法を説明するための図であ
る。
FIG. 2 is a view for explaining a method of manufacturing the pipe of FIG. 1;

【図3】溝型材の変形例を示す図である。FIG. 3 is a view showing a modified example of a channel material.

【図4】溝型材の他の変形例を示す図である。FIG. 4 is a view showing another modification of the channel material.

【図5】溝型材のさらに他の変形例を示す図である。FIG. 5 is a view showing still another modification of the channel material.

【図6】従来の内周溝を有する管の断面図である。FIG. 6 is a cross-sectional view of a conventional pipe having an inner peripheral groove.

【図7】図6における要部を拡大して示す図である。FIG. 7 is an enlarged view showing a main part in FIG. 6;

【図8】図7の管の製造方法を説明するための図であ
る。
FIG. 8 is a view for explaining a method of manufacturing the pipe of FIG. 7;

【図9】図8で説明される方法で製造された実際の管の
例を示す図である。
FIG. 9 illustrates an example of an actual tube manufactured by the method described in FIG. 8;

【符号の説明】[Explanation of symbols]

1 樹脂管 6 溝型材 12 溝 61 角部 62 角部 DESCRIPTION OF SYMBOLS 1 Resin pipe 6 Channel material 12 Groove 61 Corner 62 Corner

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 樹脂管の内周に、この樹脂管の内周の溝
を形成する環状の溝型材を配置したことを特徴とする内
周溝を有する管。
1. A tube having an inner peripheral groove, wherein an annular groove forming a groove on the inner periphery of the resin tube is arranged on the inner periphery of the resin tube.
【請求項2】 芯型の外周に、あらかじめ別途形成して
おいた環状の溝型材を設置し、そのうえで、前記芯型お
よび溝型材の外周に管材料を供給して、前記溝型材によ
って内周溝が形成された管を成形することを特徴とする
内周溝を有する管の製造方法。
2. An annular groove formed separately in advance is installed on the outer periphery of the core mold, and after that, a tube material is supplied to the outer periphery of the core mold and the groove, and the inner periphery is formed by the groove. A method for producing a tube having an inner circumferential groove, comprising forming a tube having a groove formed therein.
JP27318097A 1997-10-07 1997-10-07 Pipe having inner circumferential groove and manufacture thereof Pending JPH11108258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27318097A JPH11108258A (en) 1997-10-07 1997-10-07 Pipe having inner circumferential groove and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27318097A JPH11108258A (en) 1997-10-07 1997-10-07 Pipe having inner circumferential groove and manufacture thereof

Publications (1)

Publication Number Publication Date
JPH11108258A true JPH11108258A (en) 1999-04-20

Family

ID=17524221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27318097A Pending JPH11108258A (en) 1997-10-07 1997-10-07 Pipe having inner circumferential groove and manufacture thereof

Country Status (1)

Country Link
JP (1) JPH11108258A (en)

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