JPH07127783A - Bellows type pipe coupling and metal mold for forming bellows type pipe coupling - Google Patents
Bellows type pipe coupling and metal mold for forming bellows type pipe couplingInfo
- Publication number
- JPH07127783A JPH07127783A JP5294713A JP29471393A JPH07127783A JP H07127783 A JPH07127783 A JP H07127783A JP 5294713 A JP5294713 A JP 5294713A JP 29471393 A JP29471393 A JP 29471393A JP H07127783 A JPH07127783 A JP H07127783A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- pipe
- type pipe
- straight pipe
- bellows type
- 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.)
- Granted
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、中空の蛇腹部と、該蛇
腹部と一体成形された直管部とを有する蛇腹式管継手、
および該管継手を成形するための金型に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bellows type pipe joint having a hollow bellows portion and a straight pipe portion integrally formed with the bellows portion.
And a mold for molding the pipe joint.
【０００２】[0002]
【従来の技術】例えば、自動車の燃料タンクに於ては、
車体外面に開口した給油口と燃料タンク本体との間が、
蛇腹式の中空管状をなす可撓継手を用いて接続されるこ
とがある（実開昭６０−１６５２２０号公報参照）。こ
の蛇腹式管継手を金型成形する場合、その内面の凹凸に
よって中子を抜去し得ないため、射出成形が実質的に不
可能であり、一般にブロー成形が採用されている。2. Description of the Related Art For example, in a fuel tank of an automobile,
Between the fuel filler and the fuel tank opening on the outer surface of the vehicle body,
It may be connected using a bellows type hollow tubular flexible joint (see Japanese Utility Model Laid-Open No. 60-165220). When this bellows type pipe joint is molded by a mold, the core cannot be removed due to the unevenness of the inner surface of the bellows type pipe joint, so that injection molding is practically impossible, and blow molding is generally adopted.
【０００３】[0003]
【発明が解決しようとする課題】このブロー成形の場
合、他部材との接続部を一体成形することが困難である
ため、両端の接続部を別工程で処理する必要があるな
ど、製造工程が繁雑化しがちである。また、蛇腹部の肉
厚が均一にならず、特に山と谷との剛性が不均一になる
ために製品のばらつきが大きくなりがちであるうえ、適
用可能な材料の自由度が比較的低く、所望の特性を得難
いといった不都合がある。In the case of this blow molding, since it is difficult to integrally form the connecting portion with another member, it is necessary to process the connecting portions at both ends in a separate process. It tends to be complicated. In addition, the wall thickness of the bellows part is not uniform, and the rigidity of the peaks and valleys is not uniform, which tends to increase the product variation, and the degree of freedom of applicable materials is relatively low. There is an inconvenience that it is difficult to obtain desired characteristics.
【０００４】本発明は、このような従来技術の不都合を
解消するべく案出されたものであり、その主な目的は、
上記不都合を略完全に解消することができるように改良
された蛇腹式管継手および蛇腹式管継手成形用金型を提
供することにある。The present invention has been devised in order to eliminate such disadvantages of the prior art, and its main purpose is to:
An object of the present invention is to provide a bellows type pipe joint and a bellows type pipe joint molding die which are improved so that the above disadvantages can be almost completely eliminated.
【０００５】[0005]
【課題を解決するための手段】このような目的は、本発
明によれば、中空の蛇腹部と、該蛇腹部と一体成形され
た直管部とを有する蛇腹式管継手を、そのピッチが均一
あるいは徐々に変化し、かつその山並びに谷の外径が均
一あるいは徐々に変化する螺旋状をなすと共に、蛇腹部
を成形する部分の外径の最大寸法が、直管部を成形する
部分の外径寸法よりも小さくされ、かつその中心軸回り
について回転可能にされた中子を備える金型を用いて成
形することによって達成される。According to the present invention, an object of the present invention is to provide a bellows type pipe joint having a hollow bellows portion and a straight pipe portion integrally formed with the bellows portion. It has a spiral shape that is uniform or gradually changes, and the outer diameters of its peaks and valleys are uniform or gradually changes, and the maximum outer diameter of the part that forms the bellows part is the same as that of the part that forms the straight pipe part. This is achieved by molding using a mold that has a core that is smaller than the outer diameter dimension and that is rotatable about its central axis.
【０００６】[0006]
【作用】このように、蛇腹を螺旋状とすれば、金型内に
セットされた螺旋状の中子を、緩み方向へ回転させつつ
引き抜くことができるので、射出成形によって蛇腹式管
継手を成形することが可能となる。If the bellows are made spiral like this, the spiral core set in the mold can be pulled out while rotating in the loosening direction, so that the bellows type pipe joint is formed by injection molding. It becomes possible to do.
【０００７】[0007]
【実施例】以下に添付の図面に示された具体的な実施例
に基づいて本発明の構成を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.
【０００８】図１は、本発明による蛇腹式管継手を成形
するための金型の概略構成を示している。この金型は、
固定盤に固定された固定型１と、可動盤に固定された可
動型２と、これら両金型１・２内にキャビティ３を画定
するための中子４・５とからなっており、公知の射出成
形機に取付けられる。FIG. 1 shows a schematic structure of a mold for molding a bellows type pipe joint according to the present invention. This mold is
A fixed die 1 fixed to a fixed platen, a movable die 2 fixed to a movable platen, and cores 4 and 5 for defining a cavity 3 in these molds 1 and 2 are well known. Installed in the injection molding machine.
【０００９】この金型によって成形される蛇腹式管継手
６は、図２に示す自動車用燃料タンク７の口金８と車体
の外面に開口する給油口９との間を接続するように設け
られるものであり、図３に示すように、口金８或いは給
油口９の金属管部分と接続されるべく両端に形成された
直管部１０と、該直管部１０間を接続する中空の蛇腹管
１１とからなっている。なお、図３に於ては一方の端部
側のみを示すが、各端の構成は実質的に同一である。The bellows type pipe joint 6 formed by this mold is provided so as to connect between the mouthpiece 8 of the fuel tank 7 for an automobile shown in FIG. 2 and the fuel filler port 9 opened on the outer surface of the vehicle body. As shown in FIG. 3, a straight pipe part 10 formed at both ends so as to be connected to the metal pipe part of the mouthpiece 8 or the oil supply port 9 and a hollow bellows pipe 11 connecting the straight pipe parts 10 to each other. It consists of Although only one end side is shown in FIG. 3, the configuration of each end is substantially the same.
【００１０】この直管部１０と蛇腹管１１とは、上記し
た金型を用いて合成樹脂材にて一体的に射出成形されて
いる。そして直管部１０は、その中間部に装着されたＯ
リング１２を介して口金８或いは給油口９の金属管部分
の内周に液密に外接嵌合すると共に、別部材からなる締
め付けスリーブ１３を介して金属管部分（８・９）に緊
密に接続されるようになっている。The straight pipe portion 10 and the bellows pipe 11 are integrally injection-molded with a synthetic resin material using the above-mentioned mold. The straight pipe portion 10 is attached to the middle portion of the O pipe.
It is liquid-tightly externally fitted to the inner circumference of the metal pipe portion of the mouthpiece 8 or the oil supply port 9 via the ring 12, and tightly connected to the metal pipe portion (8, 9) via a tightening sleeve 13 which is a separate member. It is supposed to be done.
【００１１】締め付けスリーブ１３は、直管部１０の外
周に形成されたフランジ１４にその端縁を当接させると
共に、直管部１０の外周のフランジ１４より軸線方向外
側の部分に形成された突起１５に係合することによって
直管部１０に比較的緊密に内接嵌合する筒状部１３ａ
と、直管部１０の外周に嵌着された状態の金属管部分
（８・９）の端末を受容するコレットチャック部１３ｂ
とからなり、その外周に嵌装されたスライドリング１６
をフランジ１４側に寄せた状態（図３の中心線から上側
に示した状態）で金属管部分（８・９）の端末をコレッ
トチャック部１３ｂに受容した後、スライドリング１６
を金属管部分側へ押し出すことにより、コレットチャッ
ク部１３ｂが締め付けられるようになっている。The tightening sleeve 13 has its end abutted against a flange 14 formed on the outer periphery of the straight pipe portion 10, and a protrusion formed on the outer peripheral portion of the straight pipe portion 10 in the axial direction. Cylindrical portion 13a which engages with the straight pipe portion 10 so as to be fitted in the straight pipe portion 10 relatively tightly.
And a collet chuck portion 13b for receiving the end of the metal pipe portion (8, 9) fitted to the outer periphery of the straight pipe portion 10.
And a slide ring 16 fitted around the outer circumference of
After the end of the metal tube portion (8, 9) is received by the collet chuck portion 13b in a state where the end portion of the metal tube portion (8.
The collet chuck portion 13b is tightened by pushing out to the metal tube portion side.
【００１２】コレットチャック部１３ｂは、径方向に弾
発変形可能な複数の（例えば４個）爪からなっており、
その端末の内周面には、金属管部分（８・９）の外周面
に形成されたビード１７に係合する凹部１８が形成され
ている。これにより、金属管部分（８・９）と締め付け
スリーブ１３との相互抜け止めがなされるようになって
いる。またスライドリング１６は、その端部の内周面に
形成された複数の爪１９が、締め付けスリーブ１３のコ
レットチャック部１３ｂの爪間部分に係合し、戻ること
のないようになっている。The collet chuck 13b is composed of a plurality of (for example, four) claws that can be elastically deformed in the radial direction.
A recess 18 is formed on the inner peripheral surface of the end, which engages with a bead 17 formed on the outer peripheral surface of the metal pipe portion (8, 9). As a result, the metal tube portion (8, 9) and the fastening sleeve 13 are prevented from coming off from each other. Further, the slide ring 16 is configured such that a plurality of claws 19 formed on the inner peripheral surface of the end thereof are engaged with the claw portions of the collet chuck portion 13b of the tightening sleeve 13 and do not return.
【００１３】この蛇腹式管継手６を成形する際には、先
ず、各端に中子４・５が挿入され、かつ固定、可動両金
型１・２が閉じた状態でキャビティー３内に溶融樹脂を
射出する。そして樹脂が硬化したならば、エア駆動ある
いは電動駆動のロータリーアクチュエータ（図示せず）
で回転中子４に螺旋のねじが緩む方向の回転を与える。
すると回転中子４が回転しつつ軸線方向へ移動して成品
の内周から抜去される。また他方の直管部の抜き中子５
は、直線摺動アクチュエータで軸線方向へ引き抜くだけ
で抜去できる。In molding the bellows type pipe joint 6, first, the cores 4 and 5 are inserted into the respective ends, and the fixed and movable molds 1 and 2 are closed in the cavity 3. Inject the molten resin. And once the resin has hardened, a pneumatic or electric driven rotary actuator (not shown)
The rotation is given to the rotating core 4 in the direction in which the screw of the spiral is loosened.
Then, the rotating core 4 moves in the axial direction while rotating and is removed from the inner periphery of the product. On the other hand, the hollow core 5 of the other straight pipe part
Can be removed simply by pulling it out in the axial direction with a linear sliding actuator.
【００１４】両中子４・５が完全に抜去されたならば、
通常の型開きと同じ要領で成品を取り出す。そして金型
１・２が開いた状態でロータリーアクチュエータを逆回
転させて回転中子４を金型内にセットすると共に、抜き
中子５をセットし、かつ型閉めして次のショットに対す
る待機状態となる。If both cores 4 and 5 are completely removed,
Take out the product in the same way as a normal mold opening. Then, while the molds 1 and 2 are open, the rotary actuator is reversely rotated to set the rotating core 4 in the mold, the extraction core 5 is set, and the mold is closed to wait for the next shot. Becomes
【００１５】ここで回転中子４（或いは成形品）の各部
の寸法関係は、螺旋部分の直径の最大寸法Ａは、抜き側
の直管部の最大径寸法Ｂより小さくされると共に、図に
於ける右側の直管部の方が幾分小径になっている。そし
て螺旋部分の山の径並びに谷の径は、全て均一か、ある
いは図１に於ける左端から右端へ向けて徐々に小さくな
るようにされている。またそのピッチは、全て均一か、
あるいは図１に於ける左端から右端へ向けて徐々に小さ
くなるようにされている。これにより、ねじを緩み勝手
に回転させることにより、回転中子４が対応する直管部
１０と何等干渉することなく抜け出てくることとなる。Here, regarding the dimensional relationship of each part of the rotary core 4 (or molded product), the maximum dimension A of the diameter of the spiral portion is made smaller than the maximum dimension B of the straight pipe portion on the drawing side, and The diameter of the straight pipe on the right side is somewhat smaller. The diameters of the ridges and the valleys of the spiral portion are all uniform or are gradually reduced from the left end to the right end in FIG. Also, is the pitch all uniform,
Alternatively, it is gradually reduced from the left end to the right end in FIG. As a result, by loosening the screw and freely rotating it, the rotating core 4 comes out without any interference with the corresponding straight pipe portion 10.
【００１６】なお、上記実施例は、燃料タンク用の接続
管について説明したが、本発明はこれに限定されるもの
ではなく、例えば、油圧シリンダ装置のピストンロッド
を被覆するラバーブーツ、水道用接続管、真空掃除機の
吸引ホース、或いは空調機器のエアダクト等に広く適用
可能である。In the above embodiment, the connection pipe for the fuel tank has been described, but the present invention is not limited to this. For example, a rubber boot covering a piston rod of a hydraulic cylinder device, a connection for water supply. It is widely applicable to pipes, suction hoses for vacuum cleaners, air ducts for air conditioners, and the like.
【００１７】[0017]
【発明の効果】このように本発明によれば、合成樹脂製
の蛇腹式管継手に於て、他部材と連結するための直管部
と共に蛇腹部を射出成形により一体成形できるため、高
い寸法精度を獲得し得ると共に、適用可能な材料の自由
度が高いために所望の特性を獲得し得る。従って、この
種の蛇腹式管継手の品質を向上し、かつ製造工程を簡略
化する上に多大な効果が得られる。As described above, according to the present invention, in the bellows type pipe joint made of synthetic resin, the bellows portion can be integrally formed by injection molding together with the straight pipe portion for connecting with another member, so that the size is high. Precision can be obtained and desired properties can be obtained due to the high degree of freedom of applicable materials. Therefore, a great effect can be obtained in improving the quality of this type of bellows type pipe joint and simplifying the manufacturing process.
【図１】金型の相互関係を示す軸線に沿う断面図。FIG. 1 is a cross-sectional view taken along the axis showing the mutual relationship of dies.
【図２】本発明が適用される燃料タンクの要部外観図。FIG. 2 is an external view of a main part of a fuel tank to which the present invention is applied.
【図３】金属管との接続部を示す軸線に沿う断面図であ
り、中心線より上が締め付け前の状態を、中心線より下
が締め付け後の状態を示す。FIG. 3 is a cross-sectional view showing a connection portion with a metal pipe, taken along an axis, showing a state above the center line before tightening and a state below the center line after tightening.
１ 固定型 ２ 可動型 ３ キャビティ ４・５ 中子 ６ 蛇腹式管継手 ７ 燃料タンク ８ 口金 ９ 給油口 １０ 直管部 １１ 蛇腹部 １２ Ｏリング １３ 締め付けスリーブ １３ａ 筒状部 １３ｂ コレットチャック部 １４ フランジ １５ 突起 １６ スライドリング １７ ビード １８ 凹部 １９ 爪 1 Fixed Type 2 Movable Type 3 Cavity 4/5 Core 6 Bellows Type Pipe Joint 7 Fuel Tank 8 Base 9 Fuel Filling Port 10 Straight Pipe Section 11 Bellows Section 12 O-ring 13 Tightening Sleeve 13a Cylindrical Section 13b Collet Chuck Section 14 Flange 15 Protrusion 16 Slide ring 17 Bead 18 Recess 19 Claw
Claims (2)
れた直管部とを有し、金型成形にて成形される蛇腹式管
継手であって、 前記蛇腹部が、そのピッチが均一あるいは徐々に変化
し、かつその山並びに谷の内径が均一あるいは徐々に変
化する螺旋状をなすと共に、 前記蛇腹部の内径の最大寸法が、前記直管部の内径寸法
よりも小さいことを特徴とする蛇腹式管継手。1. A bellows type pipe joint having a hollow bellows portion and a straight pipe portion integrally formed with the bellows portion, the bellows type pipe joint being formed by die molding, wherein the bellows portion has a pitch thereof. Is a uniform or gradual change, and the peaks and valleys have a uniform or gradual change in inner diameter, and the maximum inner diameter of the bellows is smaller than the inner diameter of the straight pipe. A characteristic bellows type pipe fitting.
れた直管部とを有する蛇腹式管継手を成形するための金
型であって、 前記蛇腹部を成形する部分の中子が、そのピッチが均一
あるいは徐々に変化し、かつその山並びに谷の外径が均
一あるいは徐々に変化する螺旋状をなすと共に、 前記中子の外径の最大寸法が、前記直管部を成形する部
分の外径寸法よりも小さくされ、かつその中心軸回りに
ついて回転可能にされることを特徴とする蛇腹式管継手
成形用金型。2. A mold for molding a bellows type pipe joint having a hollow bellows part and a straight pipe part integrally formed with the bellows part, wherein a core for forming the bellows part. However, the pitch is uniform or gradually changed, and the outer diameters of the peaks and valleys are uniform or gradually changed, and the maximum outer diameter of the core forms the straight pipe portion. A bellows-type pipe joint molding die, which is smaller than the outer diameter of the portion to be turned and is rotatable about its central axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29471393A JP3246814B2 (en) | 1993-10-29 | 1993-10-29 | Bellows type pipe fittings and molds for forming bellows type pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29471393A JP3246814B2 (en) | 1993-10-29 | 1993-10-29 | Bellows type pipe fittings and molds for forming bellows type pipe fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07127783A true JPH07127783A (en) | 1995-05-16 |
| JP3246814B2 JP3246814B2 (en) | 2002-01-15 |
Family
ID=17811349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29471393A Expired - Fee Related JP3246814B2 (en) | 1993-10-29 | 1993-10-29 | Bellows type pipe fittings and molds for forming bellows type pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3246814B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7040669B2 (en) | 2002-11-01 | 2006-05-09 | Asteer Co., Ltd. | Fuel feeding pipe |
| EP1997468A1 (en) * | 2007-05-31 | 2008-12-03 | Molift A/S | Distance piece for patient rail system |
| JP2017222039A (en) * | 2016-06-13 | 2017-12-21 | タイガースポリマー株式会社 | Manufacturing method of synthetic resin-made pipe |
| CN116659592A (en) * | 2023-07-31 | 2023-08-29 | 江苏华强模具科技有限公司 | Oil filler support measuring device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180067064A (en) * | 2016-12-12 | 2018-06-20 | 최태국 | Water treatment filter manufacturing apparatus and filter |
-
1993
- 1993-10-29 JP JP29471393A patent/JP3246814B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7040669B2 (en) | 2002-11-01 | 2006-05-09 | Asteer Co., Ltd. | Fuel feeding pipe |
| EP1997468A1 (en) * | 2007-05-31 | 2008-12-03 | Molift A/S | Distance piece for patient rail system |
| JP2017222039A (en) * | 2016-06-13 | 2017-12-21 | タイガースポリマー株式会社 | Manufacturing method of synthetic resin-made pipe |
| CN116659592A (en) * | 2023-07-31 | 2023-08-29 | 江苏华强模具科技有限公司 | Oil filler support measuring device |
| CN116659592B (en) * | 2023-07-31 | 2023-10-20 | 江苏华强模具科技有限公司 | Oil filler support measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3246814B2 (en) | 2002-01-15 |
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