JP4284086B2 - Synthetic resin fittings - Google Patents

Synthetic resin fittings Download PDF

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Publication number
JP4284086B2
JP4284086B2 JP2003037753A JP2003037753A JP4284086B2 JP 4284086 B2 JP4284086 B2 JP 4284086B2 JP 2003037753 A JP2003037753 A JP 2003037753A JP 2003037753 A JP2003037753 A JP 2003037753A JP 4284086 B2 JP4284086 B2 JP 4284086B2
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JP
Japan
Prior art keywords
joint
synthetic resin
joint body
view
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 - Lifetime
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JP2003037753A
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Japanese (ja)
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JP2004245373A (en
Inventor
正樹 山本
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.)
Bridgestone Corp
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Bridgestone 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
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  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Joints With Pressure Members (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は給水や給湯用に用いられる合成樹脂製継手に関するものであり、継手が螺着中に切断してしまった際にも螺脱可能な継手に係るものである。
【0002】
【従来の技術】
近年、集合住宅は元より、戸建て住宅における給水・給湯用配管にあって、合成樹脂製のパイプが広く使用されるようになってきたが、同時に配管継手も合成樹脂製のものが採用されるようになっている。好んで用いられている合成樹脂としては、ポリブテン樹脂があり、比較的肉薄のパイプとすることにより柔軟性を備えたものとなり、一方、肉厚の場合には剛性が高く、継手に採用されるものである。
【0003】
図1はかかる継手の一例であるワンプッシュ型継手を示す側面図、図2は正面図、図3は断面図を示すものである。1はポリブテン製の継手本体であり、2は合成樹脂製のキャップである。そして、継手本体1はこれを貫通して流路3が形成されており、一方にキャップ2と螺合する外ねじ4が形成され、他方には図示しない例えばヘッダ−の分岐口と螺合する外ねじ5が形成されている。そして、キャップ2を螺合する側にO−リング6、パイプ保持リング7が内蔵され、差し込まれるパイプ(図示せず)の表面にパイプ保持リング7の爪が食い込んでパイプが保持されるパイプ保持機構を備えている。8は継手本体1の外表面に形成された回動係合部であり、スパナ等によってこの部位を挟みつつ継手本体1を例えばヘッダ−分岐口と螺合することになる。
【0004】
さて、継手本体1が例えば金属製のものであれば全く問題はないが、これが前記したポリブテンのような合成樹脂製の場合には継手本体1の強度よりもスパナ等による回転力が勝ってしまうケ−スがあり、継手本体1がねじ切れてしまうことが発生する。このため、切断して残ってしまった部分をヘッダ−分岐口より螺脱しなくてはならなくなるが、ヘッダ−分岐口内に強く螺合された状態で切断してしまっているため、これを螺脱するのは容易なことではない。
【0005】
一方、継手本体1の切断を恐れるあまり、スパナの回転力を少なめにすると、継手本体1が十分に螺合していない状態で使用に供されることになり、漏水の発生の大きな原因ともなってしまう。
【0006】
【発明が解決しようとする課題】
本発明は、合成樹脂製の継手が過剰な締め付けにより切断してしまった場合でも、螺合口内より容易にこれを螺脱することを可能とした継手を提供するものである。
【0007】
【課題を解決するための手段】
本発明の要旨は、合成樹脂製継手本体と、前記継手本体を貫通する貫通流路と、前記継手本体の外表面の前記貫通流路の両端側にそれぞれ形成された螺合用ねじと、前記継手本体の外表面の前記螺合用ねじの間に形成され、回転工具が係合可能な回動係合部と、前記貫通流路の内周壁に形成され、回転治具が嵌合可能な係止部と、を備えることを特徴とする合成樹脂製継手に係るものである。
【0008】
回転治具としては、通常用いられている回転治具がそのまま用いられるのが望ましく、かかる係止部の例としては、正面視で正六角形であれば六角レンチが使用可能であり、係止部が正面視で180度の角度をもって窪みをなす場合にはマイナスドライバ−が使用され、正面視で90度の角度をもって窪みをなす場合にはプラスドライバ−がそのまま用いられるものである。
【0009】
【発明の実施の形態】
本発明は以上の通りであって、継手の流路に回転治具が嵌合可能な係止部を備えたものである。このため、継手が相手方との螺着中に切断が起こり、ねじ部に継手の一部が残ってしまったとしても、継手には流路に備えられた係止部が存在するため、この係止部に回転治具を嵌め合わせてこれを回転することにより、螺着したままで切断してしまった継手の部分が容易に螺脱できることとなったものである。
【0010】
一般に回転治具は六角レンチ、マイナスドライバ−、プラスドライバ−等であり、流路の正面にこれが嵌合するに十分な形状を形成しておくものである。従って、回転治具として他の形状のものを用いようとするのであれば、それに応じて予め流路に係止部を形成しておくことになる。
【0011】
尚、継手の例としては単にパイプを連結するための継手、或いはいわゆるワンプッシュ型継手である場合でもよく、後者の場合には、貫通流路の一方端にO−リング、パイプ保持リング等のパイプ保持機構を備えた構造となる。
【0012】
継手を構成する合成樹脂としては、ポリブテン、ナイロン、塩ビ、ポリエチレンその他いわゆるエンプラと称される各種合成樹脂が用いられる。
【0013】
【実施例】
以下、本発明の継手を図面をもって更に詳細に説明する。図4は本発明のワンプッシュ型継手の第1例(A)を示す正面図である。尚、側面図、断面図は前記した図1とほぼ同じでありここでは省略する。又、符号1〜8は図1〜図3に説明したものと同一であり説明を省略するが、更に詳しく述べれば、継手本体1には図7に示すように流路3に二つの段部3a、3bが形成され、段部3a内にO−リング6、パイプ保持リング7が内蔵され、深部側の段部3bは差し込まれるパイプの先端が当接されて差し込みが完全であることを示す部位である。
【0014】
さて、本発明の継手Aの特徴点は段部3bよりも深い位置にある流路3を六角形状3cとしたことにある。従って、図示しない例えばヘッダ−の分岐口に対して過剰な力でねじ込まれてしまった場合に、継手本体1はヘッダ−の分岐口の雌ねじ内に継手本体1の外ねじ4を螺着したままの状態で切断されてしまうことがあるが、この場合に、ヘッダ−側に残った継手本体1にはその流路3が六角形状3cとされていることから、かかる六角形状3c内に既存の六角レンチを嵌め込んで回転することにより切断部が容易に螺脱できることとなったものである。
【0015】
図5は本発明のワンプッシュ型継手の第2例(B)を示す正面図であり、図6は本発明の同様の継手の第3例(C)を示す正面図である。即ち、図5における例は流路3に180度の相対する位置に係合部3dを形成したものであり、図6の例は流路3に90度の相対位置に係合部3eを形成したものである。従って、図5の場合には先端がマイナスのドライバ−をもって、更には、図6の場合には先端がプラスのドライバ−をもって回転することにより切断部位が容易に螺脱できることになる。
【0016】
尚、図7は本発明のワンプッシュ型継手にあって、パイプ保持機構の別例を示す図3と同様の断面図であり、段部3a内にO−リング6、パイプ保持リングとしてのカラ−9が内蔵されており、その外表面を傾斜面9aとしたものである。一方、キャップ2の内表面はこのカラ−9の傾斜面9aと対向する傾斜面2aとされていて、差し込まれるパイプ20が抜け出そうとする際に、両傾斜面2a、9aが接触し、カラ−9は内包に向かい力が加えられてパイプ20の抜けを防止する構造となっている。符号20aはパイプ保形用内筒である。
【0017】
図8はパイプ20を取り付ける機器10を示し、かかる機器10にはパイプ20に繋がる流路11が形成され、流路11の端部に継手Dと螺合するための雌ねじ12が施されている。図9は本発明の継手第4例(D)を示す一部切断側面図であり、図10はその正面図である。継手Dには貫通する流路3が形成されると共に、外表面の中央にスパナ等との回動係合部8が形成され、その一方側に前記した雌ねじ12と螺合する雄ねじ41が刻設され、他方側にはパイプ20内に挿入される突起部42が形成されている。そして、少なくとも機器10内に螺合される側の流路3に回動治具が嵌め込まれる係止部(ここでは六角形状)3fを形成したもので、この部位が万一機器10内に残ってしまったとしても六角レンチをこの係止部3fに嵌め込んでこれを回動することにより容易に螺脱できることになったものである。尚、この例では係止部3fを流路3の全体に形成した例であるが、いずれにしろ、本発明の継手にあっては、機器10内に残ってしまう側の流路3にこの係止部を形成しておくものである。尚、図中の符号43はパイプ20内に突起部42を嵌め込み、これを固定するための緊蹄バンドである。
【0018】
【発明の効果】
本発明は以上のような構成をもつものであり、合成樹脂製の継手が過剰のねじり力により切断現象が起こってしまっても、相手方のねじ部から容易にこれを螺脱できることのなったものであり、その工業的価値は極めて高い。
【図面の簡単な説明】
【図1】図1は従来のワンプッシュ型継手を示す側面図である。
【図2】図2は図1の正面図である。
【図3】図3は図1の断面図である。
【図4】図4は本発明のワンプッシュ型継手の第1例を示す正面図である。
【図5】図5は本発明のワンプッシュ型継手の第2例を示す正面図である。
【図6】図6は本発明のワンプッシュ型継手の第3例を示す正面図である。
【図7】図7はワンプッシュ型継手のパイプ保持機構の別例を示す断面図である。
【図8】図8はパイプを取り付ける機器を示す。
【図9】図9は本発明の継手第4例を示す一部切断側面図である。
【図10】図10は図9の正面図である。
【符号の説明】
A、B、C、D‥継手、
1‥継手本体、
2‥キャップ、
2a‥キャップの傾斜面、
3‥継手本体に形成した流路、
3a、3b‥流路内の段部、
3c、3d、3e、3f‥流路内の係止部、
4、5‥外ねじ、
6‥O−リング、
7‥パイプ保持リング、
8‥回動係合部、
9‥カラ−、
9a‥カラ−の傾斜面、
10‥機器、
11‥機器の流路、
12‥雌ねじ、
20‥パイプ、
20a‥パイプ保形用内筒、
41‥雄ねじ、
42‥突起部、
43‥緊蹄バンド。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin joint used for water supply or hot water supply, and relates to a joint that can be removed even when the joint is cut during screwing.
[0002]
[Prior art]
In recent years, apartment houses are originally used for water supply and hot water supply pipes in detached houses, and pipes made of synthetic resin have come to be widely used. At the same time, pipe joints made of synthetic resin are also adopted. It is like that. As a preferred synthetic resin, there is a polybutene resin, which has a flexibility by making it a relatively thin pipe. On the other hand, when it is thick, it has high rigidity and is used for a joint. Is.
[0003]
FIG. 1 is a side view showing a one-push type joint as an example of such a joint, FIG. 2 is a front view, and FIG. 3 is a sectional view. 1 is a joint body made of polybutene, and 2 is a cap made of synthetic resin. The joint body 1 has a passage 3 formed therethrough, one of which is formed with an external screw 4 that is screwed with the cap 2, and the other is screwed with a branch port of a header (not shown). An external screw 5 is formed. Then, an O-ring 6 and a pipe holding ring 7 are built in the side to which the cap 2 is screwed, and a pipe holding in which a claw of the pipe holding ring 7 bites into the surface of a pipe (not shown) to be inserted to hold the pipe. It has a mechanism. Reference numeral 8 denotes a rotation engaging portion formed on the outer surface of the joint body 1, and the joint body 1 is screwed into, for example, a header-branch port while sandwiching this portion by a spanner or the like.
[0004]
Now, there is no problem if the joint body 1 is made of metal, for example. However, when the joint body 1 is made of a synthetic resin such as polybutene, the rotational force by a spanner or the like is superior to the strength of the joint body 1. There is a case, and the joint body 1 may be broken. For this reason, the remaining portion after cutting must be screwed off from the header-branch port, but it is cut in a state of being strongly screwed into the header-branch port. It's not easy to do.
[0005]
On the other hand, if the rotational force of the spanner is too small to fear cutting the joint body 1, the joint body 1 is used in a state where the joint body 1 is not sufficiently screwed, which is a major cause of water leakage. End up.
[0006]
[Problems to be solved by the invention]
The present invention provides a joint that can be easily unscrewed from the screw-engagement opening even when the joint made of synthetic resin is cut by excessive tightening.
[0007]
[Means for Solving the Problems]
Gist of the present invention includes a synthetic resin joint body, a through channel through the fitting body, said fitting said through channel at both ends for screwing are formed respectively on the side screw of the outer surface of the body, the A rotation engagement portion formed between the screw for screwing on the outer surface of the joint body and engageable with a rotary tool, and an engagement formed on the inner peripheral wall of the through-flow passage and capable of fitting a rotation jig. And a stop portion, and a synthetic resin joint.
[0008]
As the rotating jig, it is desirable to use a commonly used rotating jig as it is. As an example of such a locking part, a hexagonal wrench can be used if it is a regular hexagon in front view. When a depression is formed at an angle of 180 degrees in front view, a minus driver is used, and when a depression is formed at an angle of 90 degrees in front view, a plus driver is used as it is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
This invention is as above, Comprising: The latching | locking part which can fit a rotation jig in the flow path of a joint is provided. For this reason, even if the joint is cut while being screwed with the other party and a part of the joint remains in the threaded portion, the joint has a locking portion provided in the flow path. By fitting the rotating jig to the stopper and rotating it, the joint portion that has been cut while being screwed can be easily screwed off.
[0010]
In general, the rotating jig is a hexagon wrench, a flat-blade screwdriver, a flat-blade screwdriver, or the like, and has a shape sufficient to fit the front face of the flow path. Therefore, if it is going to use the thing of another shape as a rotation jig, the latching | locking part will be previously formed in a flow path according to it.
[0011]
An example of a joint may be a joint for simply connecting pipes or a so-called one-push joint. In the latter case, an O-ring, a pipe holding ring, etc. The structure is provided with a pipe holding mechanism.
[0012]
As the synthetic resin constituting the joint, polybutene, nylon, polyvinyl chloride, polyethylene and other various synthetic resins called engineering plastics are used.
[0013]
【Example】
Hereinafter, the joint of the present invention will be described in more detail with reference to the drawings. FIG. 4 is a front view showing a first example (A) of the one-push joint of the present invention. The side view and the sectional view are substantially the same as those in FIG. Reference numerals 1 to 8 are the same as those described in FIGS. 1 to 3 and will not be described. More specifically, the joint body 1 includes two steps in the flow path 3 as shown in FIG. 3a and 3b are formed, the O-ring 6 and the pipe holding ring 7 are built in the step portion 3a, and the step portion 3b on the deep side is in contact with the tip of the pipe to be inserted, indicating that the insertion is complete. It is a part.
[0014]
The feature point of the joint A of the present invention is that the flow path 3 located deeper than the step portion 3b has a hexagonal shape 3c. Therefore, for example, when the joint body 1 is screwed with an excessive force into a branch port of the header (not shown), the joint body 1 remains screwed with the external screw 4 of the joint body 1 in the female thread of the header branch port. In this case, since the flow path 3 of the joint body 1 remaining on the header-side is a hexagonal shape 3c, the existing hexagonal shape 3c has an existing flow path 3. The cutting part can be easily screwed off by inserting and rotating a hexagon wrench.
[0015]
FIG. 5 is a front view showing a second example (B) of the one-push joint of the present invention, and FIG. 6 is a front view showing a third example (C) of the same joint of the present invention. That is, the example in FIG. 5 is the one in which the engaging portion 3d is formed at a position 180 degrees opposite to the flow path 3, and the example in FIG. It is a thing. Accordingly, in the case of FIG. 5, the cutting portion can be easily screwed by rotating with a screwdriver with a minus tip, and with the screwdriver with a plus tip in the case of FIG.
[0016]
7 is a cross-sectional view similar to FIG. 3 showing another example of the pipe holding mechanism in the one-push joint according to the present invention. In the step 3a, an O-ring 6 and a collar as a pipe holding ring are provided. -9 is incorporated, and the outer surface thereof is an inclined surface 9a. On the other hand, the inner surface of the cap 2 is an inclined surface 2a facing the inclined surface 9a of the collar 9, and when the pipe 20 to be inserted is about to come out, both the inclined surfaces 2a and 9a come into contact with each other. -9 has a structure in which a force is applied to the inner bag to prevent the pipe 20 from coming off. Reference numeral 20a denotes a pipe-holding inner cylinder.
[0017]
FIG. 8 shows a device 10 to which a pipe 20 is attached. The device 10 is formed with a flow path 11 connected to the pipe 20, and an end of the flow path 11 is provided with a female screw 12 for screwing with a joint D. . FIG. 9 is a partially cut side view showing a fourth example (D) of the joint of the present invention, and FIG. 10 is a front view thereof. The joint D is formed with a flow passage 3 passing therethrough, and a rotating engagement portion 8 with a spanner or the like is formed at the center of the outer surface, and a male screw 41 screwed with the female screw 12 is engraved on one side thereof. On the other side, a protrusion 42 to be inserted into the pipe 20 is formed. Then, at least a locking portion (here hexagonal shape) 3f into which the turning jig is fitted is formed in the flow path 3 on the side screwed into the device 10, and this portion should remain in the device 10 by any chance. Even if this occurs, the hexagon wrench can be easily screwed by fitting it into the locking portion 3f and turning it. In this example, the locking portion 3f is formed over the entire flow path 3, but in any case, in the joint of the present invention, the flow path 3 on the side that remains in the device 10 is connected to this flow path 3. A locking part is formed. Note that reference numeral 43 in the figure denotes a hooves band for fitting the protrusion 42 into the pipe 20 and fixing it.
[0018]
【The invention's effect】
The present invention has the above-described configuration, and even when a synthetic resin joint has a cutting phenomenon caused by an excessive torsional force, it can be easily unscrewed from the other threaded portion. And its industrial value is extremely high.
[Brief description of the drawings]
FIG. 1 is a side view showing a conventional one-push joint.
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is a front view showing a first example of the one-push joint of the present invention.
FIG. 5 is a front view showing a second example of the one-push joint of the present invention.
FIG. 6 is a front view showing a third example of the one-push joint of the present invention.
FIG. 7 is a cross-sectional view showing another example of a pipe holding mechanism of a one-push type joint.
FIG. 8 shows an apparatus for attaching a pipe.
FIG. 9 is a partially cut side view showing a fourth example of the joint of the present invention.
FIG. 10 is a front view of FIG. 9;
[Explanation of symbols]
A, B, C, D ... Fittings,
1 ... Fitting body,
2 ... Cap,
2a ... inclined surface of the cap,
3. Flow path formed in the joint body,
3a, 3b ... steps in the flow path,
3c, 3d, 3e, 3f ... locking part in the flow path,
4, 5 ... external thread,
6 ... O-ring,
7. Pipe holding ring,
8 Rotating engagement part,
9 Color,
9a: Colored inclined surface,
10. Equipment,
11 ... Equipment flow path,
12 ... Female thread,
20 ... pipe,
20a ... pipe retaining cylinder,
41 ... Male thread,
42 ... projection,
43. Bandage band.

Claims (5)

合成樹脂製継手本体と、
前記継手本体を貫通する貫通流路と、
前記継手本体の外表面の前記貫通流路の両端側にそれぞれ形成された螺合用ねじと、
前記継手本体の外表面の前記螺合用ねじの間に形成され、回転工具が係合可能な回動係合部と、
前記貫通流路の内周壁に形成され、回転治具が嵌合可能な係止部と、
を備えることを特徴とする合成樹脂製継手。
A synthetic resin joint body,
A through channel that penetrates the joint body ;
Screws formed on both ends of the through-flow passage on the outer surface of the joint body,
A rotation engaging portion formed between the screwing screws on the outer surface of the joint body, and engageable with a rotary tool;
A locking portion that is formed on the inner peripheral wall of the through-flow channel and into which a rotating jig can be fitted,
Plastic fittings, characterized in that it comprises a.
前記係止部が正面視で正六角形である請求項1記載の合成樹脂製継手。The synthetic resin joint according to claim 1, wherein the locking portion is a regular hexagon when viewed from the front. 前記係止部が正面視で180度の角度をもって窪みをなす請求項1記載の合成樹脂製継手。The synthetic resin joint according to claim 1, wherein the locking portion is recessed at an angle of 180 degrees when viewed from the front. 前記係止部が正面視で90度の角度をもって窪みをなす請求項1記載の合成樹脂製継手。The synthetic resin joint according to claim 1, wherein the locking portion is recessed at an angle of 90 degrees when viewed from the front. 前記貫通流路の一方端に、パイプ保持機構を備えた請求項1乃至4記載の合成樹脂製継手。 Wherein one end of the through channel, claims 1 to 4 synthetic resin joint according with a pipe holding mechanism.
JP2003037753A 2003-02-17 2003-02-17 Synthetic resin fittings Expired - Lifetime JP4284086B2 (en)

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JP2003037753A JP4284086B2 (en) 2003-02-17 2003-02-17 Synthetic resin fittings

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JP4284086B2 true JP4284086B2 (en) 2009-06-24

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