JPH11325350A - Pipe connecting structure and method - Google Patents
Pipe connecting structure and methodInfo
- Publication number
- JPH11325350A JPH11325350A JP10142167A JP14216798A JPH11325350A JP H11325350 A JPH11325350 A JP H11325350A JP 10142167 A JP10142167 A JP 10142167A JP 14216798 A JP14216798 A JP 14216798A JP H11325350 A JPH11325350 A JP H11325350A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- soft metal
- metal pipe
- connection
- short
- 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.)
- Withdrawn
Links
Landscapes
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、給湯器の通水管等
に使用される銅管や、排気ガス管や油管等に使用される
アルミニウム管等の軟質金属製管の端部を、他の接続部
等と接続する管接続構造及び管接続方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe made of a soft metal such as a copper pipe used for a water pipe of a water heater or an aluminum pipe used for an exhaust gas pipe or an oil pipe. The present invention relates to a pipe connection structure and a pipe connection method for connecting to a connection portion and the like.
【０００２】[0002]
【従来の技術】従来から、銅管やアルミニウム管等の軟
質金属製管は給湯器の通水管や排気ガス管、油管等に使
用されており、軟質金属製管の端部を他の接続部等と接
続する管接続構造として、種々の構造が知られている。
従来の管接続構造として、ワッシャを用いた管接続構造
（以下、イ号という），バックアップリングを用いた管
接続構造（以下、ロ号という），管接続具を用いた管接
続構造（以下、ハ号という）が知られている。以下、イ
号の管接続構造及び管接続方法について、図面を用いて
説明する。図６（ａ）はワッシャを用いた従来の管接続
構造を示す要部断面図である。図６（ａ）において、１
０は給湯器の通水管等に使用される銅管からなる軟質金
属製管、１０ａは軟質金属製管１０の接続側の端部の外
周壁にビーディングにより形成された突条のビード部、
１１は軟質金属製管１０の端部を嵌挿して接続する筒状
体からなる接続部、１１ａは接続部１１の上端部にフラ
ンジ状に形成された接続固定部、１１ｂは接続部１１の
内周に段差状に形成されたＯリング嵌挿部、１２は軟質
金属製管１０のビード部１０ａの下側部とＯリング嵌挿
部１１ｂの間に装着されたＯリング、１３は軟質金属製
管１０に遊嵌され軟質金属製管１０のビード部１０ａの
上側部に当接したリング状のワッシャ、１４は接続部１
１の接続固定部１１ａとワッシャ１３を外嵌係止する係
止具である。以上のように構成されたイ号の管接続構造
について、以下その管接続方法について説明する。ビー
ド部１０ａを有した軟質金属製管１０のビード部１０ａ
の下側部とＯリング嵌挿部１１ｂの間にＯリング１２を
装着して軟質金属製管１０の端部を接続部１１に嵌挿
し、Ｏリング１２をビード部１０ａと接続部１１の内周
壁に当接する。次いで、ワッシャ１３を軟質金属製管１
０に外嵌してワッシャ１３をビード部１０ａの上側部及
び接続部１１の接続固定部１１ａの上面に当接させ、係
止具１４で接続固定部１１ａとワッシャ１３を係止し、
図６（ａ）に示すように、軟質金属製管１０を接続部１
１に接続する。2. Description of the Related Art Conventionally, soft metal pipes such as copper pipes and aluminum pipes have been used for water pipes, exhaust gas pipes, oil pipes, etc. of water heaters, and the ends of the soft metal pipes are connected to other connecting parts. Various structures are known as a pipe connection structure for connecting to the like.
Conventional pipe connection structures include a pipe connection structure using a washer (hereinafter referred to as "A"), a pipe connection structure using a backup ring (hereinafter referred to as "B"), and a pipe connection structure using a pipe connection tool (hereinafter referred to as "B"). Is known. Hereinafter, the pipe connection structure and the pipe connection method of No. A will be described with reference to the drawings. FIG. 6A is a sectional view of a main part showing a conventional pipe connection structure using a washer. In FIG. 6A, 1
0 is a soft metal pipe made of a copper pipe used for a water pipe of a water heater, etc., 10a is a bead portion of a ridge formed by beading on an outer peripheral wall of a connection side end of the soft metal pipe 10,
Reference numeral 11 denotes a connecting portion formed of a tubular body into which the end of the soft metal pipe 10 is inserted and connected, 11a denotes a connection fixing portion formed in a flange shape at the upper end of the connecting portion 11, and 11b denotes a connecting portion of the connecting portion 11. An O-ring fitting portion formed in a step shape around the circumference, 12 is an O-ring mounted between the lower side of the bead portion 10a of the soft metal tube 10 and the O-ring fitting portion 11b, and 13 is a soft metal material. A ring-shaped washer loosely fitted to the tube 10 and abutting on the upper portion of the bead portion 10a of the soft metal tube 10, and 14 is a connecting portion 1
This is a locking tool for externally locking the connection fixing portion 11a and the washer 13. Regarding the pipe connection structure of No. A configured as described above, the pipe connection method will be described below. Bead portion 10a of soft metal tube 10 having bead portion 10a
The O-ring 12 is mounted between the lower part of the O-ring and the O-ring fitting insertion portion 11b, and the end of the soft metal pipe 10 is inserted into the connection portion 11, and the O-ring 12 is inserted between the bead portion 10a and the connection portion 11. Contact the peripheral wall. Next, the washer 13 is connected to the soft metal tube 1.
0, the washer 13 is brought into contact with the upper portion of the bead portion 10a and the upper surface of the connection fixing portion 11a of the connection portion 11, and the connection fixing portion 11a and the washer 13 are locked by the locking member 14,
As shown in FIG. 6A, the soft metal tube 10 is connected to the connecting portion 1.
Connect to 1.
【０００３】次に、ロ号の管接続構造及び管接続方法に
ついて、図面を用いて説明する。図６（ｂ）はバックア
ップリングを用いた従来の管接続構造を示す要部断面図
である。尚、図６（ａ）と同様のものには同一の符号を
付して説明を省略する。図６（ｂ）において、１０ｂは
軟質金属製管１０の接続側の下端部にビーディングによ
り形成された突条の下部ビード部、１０ｃは下部ビード
部１０ｂの上方に形成された突条の上部ビード部、１５
は軟質金属製管１０の外周に配設され上部ビード部１０
ｃの下側部に当接して配設されたバックアップリング、
１６はワッシャ１３と接続部１１の接続固定部１１ａを
固定したネジである。以上のように構成されたロ号の管
接続構造について、以下その管接続方法について説明す
る。上部ビード部１０ｃの下側部に配設されたバックア
ップリング１５を軟質金属製管１０に装着するととも
に、バックアップリング１５と下部ビード部１０ｂの間
にＯリング１２を装着して軟質金属製管１０の端部を接
続部１１に嵌挿する。次いで、ワッシャ１３を軟質金属
製管１０に外嵌して上部ビード部１０ｃの上側部及び接
続部１１の接続固定部１１ａの上面に当接させ、ネジ１
６でワッシャ１３を接続部１１の接続固定部１１ａに固
定し、図６（ｂ）に示すように、軟質金属製管１０を接
続部１１に接続する。Next, the pipe connection structure and the pipe connection method of No. B will be described with reference to the drawings. FIG. 6B is a sectional view of a main part showing a conventional pipe connection structure using a backup ring. Note that the same components as those in FIG. 6A are denoted by the same reference numerals, and description thereof is omitted. In FIG. 6B, reference numeral 10b denotes a lower bead portion of a ridge formed by beading at a lower end portion on the connection side of the soft metal pipe 10, and 10c denotes an upper portion of a ridge formed above the lower bead portion 10b. Bead, 15
Is provided on the outer periphery of the soft metal tube 10 and is provided with an upper bead portion 10.
c, a backup ring disposed in contact with the lower part of the
Reference numeral 16 denotes a screw fixing the washer 13 and the connection fixing portion 11a of the connection portion 11. Regarding the pipe connection structure of No. 2 configured as described above, the pipe connection method will be described below. A backup ring 15 disposed on the lower side of the upper bead portion 10c is mounted on the soft metal tube 10, and an O-ring 12 is mounted between the backup ring 15 and the lower bead portion 10b to form the soft metal tube 10 Is inserted into the connection portion 11. Next, the washer 13 is fitted over the soft metal pipe 10 and is brought into contact with the upper part of the upper bead part 10c and the upper surface of the connection fixing part 11a of the connection part 11, and the screw 1
At 6, the washer 13 is fixed to the connection fixing portion 11 a of the connection portion 11, and the soft metal pipe 10 is connected to the connection portion 11 as shown in FIG.
【０００４】次に、ハ号の管接続構造及び管接続方法に
ついて、図面を用いて説明する。図６（ｃ）は管接続具
を用いた従来の管接続構造を示す要部断面図である。
尚、図６（ａ）と同様のものには同一の符号を付して説
明を省略する。図６（ｃ）において、１７は軟質金属製
管１０の接続側の端部に固定された管接続具であり、一
端部に軟質金属製管１０の挿着部を有し、他端部にＯリ
ング１２を嵌着したＯリング座部を有している。１７ａ
は管接続具１７の固定部、１８は軟質金属製管１０に管
接続具１７を溶接して固定した溶接部である。以上のよ
うに構成されたハ号の管接続構造について、以下その管
接続方法について説明する。管接続具１７を軟質金属製
管１０の接続側の端部に装着するとともに溶接部１８で
溶接して管接続具１７を軟質金属製管１０に固定する。
次いで、Ｏリング１２を接続具１７の所定部に嵌着し、
管接続具１７の固定部１７ａと接続部１１の接続固定部
１１ａを当接して係止具１４で係止し、図６（ｃ）に示
すように、軟質金属製管１０を接続部１１に接続する。Next, the pipe connection structure and the pipe connection method of No. C will be described with reference to the drawings. FIG. 6C is a sectional view of a main part showing a conventional pipe connection structure using a pipe connection tool.
Note that the same components as those in FIG. 6A are denoted by the same reference numerals, and description thereof is omitted. In FIG. 6 (c), reference numeral 17 denotes a pipe connector fixed to a connection-side end of the soft metal pipe 10, which has an insertion portion for the soft metal pipe 10 at one end and a pipe connection tool at the other end. It has an O-ring seat to which the O-ring 12 is fitted. 17a
Is a fixed portion of the pipe connector 17, and 18 is a welded portion where the pipe connector 17 is welded and fixed to the soft metal pipe 10. The pipe connection method for the pipe connection structure of No. C configured as described above will be described below. The pipe connector 17 is fixed to the soft metal pipe 10 by attaching the pipe connector 17 to the connection-side end of the soft metal pipe 10 and welding the welded portion 18.
Next, the O-ring 12 is fitted to a predetermined portion of the connection tool 17,
The fixing portion 17a of the pipe connector 17 and the connection fixing portion 11a of the connecting portion 11 are brought into contact with each other and locked by the locking member 14, and the soft metal pipe 10 is connected to the connecting portion 11 as shown in FIG. Connecting.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来の管接続構造及び管接続方法では以下の課題を有して
いた。イ号の管接続構造では、ワッシャが軟質金属製管
に遊嵌されているため、軟質金属製管の内圧の変動等に
より軟質金属製管が揺動し易いとともに、ワッシャがビ
ード部の上側部の基部に点接触や線接触で当接するた
め、ビード部の基部に応力が集中してビード部に割れが
発生し易く、軟質金属製管の耐久性に欠けるという課題
を有していた。また、接続部と軟質金属製管のビード部
に当接したＯリングが軟質金属製管の揺動により変形し
圧縮永久歪みが発生して軟質金属製管内を流れる液体や
気体等の流体の漏れが発生し易いという課題を有してい
た。ワッシャが軟質金属製管に遊嵌されているため、接
続部との接続作業中に軟質金属製管の長さ方向にワッシ
ャが移動し易く接続作業性に欠けるという課題を有して
いた。ロ号の管接続構造では、ワッシャが軟質金属製管
に遊嵌されているため、軟質金属製管の内圧の変動等に
より軟質金属製管が揺動し易く、また、ワッシャが点接
触や線接触で上部ビード部の上側部に当接しているた
め、上部ビード部に応力が集中してビード部に割れが発
生し易く軟質金属製管の耐久性に欠けるという課題を有
していた。また、接続部と軟質金属製管に当接したＯリ
ングが軟質金属製管の揺動により変形し圧縮永久歪みが
発生して軟質金属製管内を流れる液体や気体の漏れが発
生し易いという課題を有していた。バックアップリング
を装着しているため、軟質金属製管にビード部を２箇所
形成する手間を要すとともに、バックアップリング装着
の手間を要し軟質金属製管の接続作業性に欠ける。ま
た、管接続作業時にバックアップリングも要し、管接続
時に要する部品点数が増えるとともに、ワッシャが軟質
金属製管に遊嵌されているためワッシャが軟質金属製管
の長さ方向に移動し易く接続作業性に欠けるという課題
を有していた。ハ号の管接続構造では、管接続具の構造
が複雑で管接続具の作製に時間を要し生産性に欠けると
ともに、管接続具を軟質金属製管に溶接して固定する手
間を要し接続作業性に欠けるという課題を有していた。
また、溶接による熱歪みが残留し局部的に機械的強度を
劣化させ耐久性に欠けるという課題を有していた。However, the above-described conventional pipe connection structure and pipe connection method have the following problems. In the pipe connection structure of No. A, since the washer is loosely fitted to the soft metal pipe, the soft metal pipe is likely to swing due to fluctuations in the internal pressure of the soft metal pipe, etc., and the washer is mounted on the upper part of the bead portion. However, the point of contact or the line contact makes contact with the base portion of the bead portion, stress is concentrated on the base portion of the bead portion, cracks are easily generated in the bead portion, and the durability of the soft metal pipe is lacking. In addition, the O-ring abutting on the connecting portion and the bead portion of the soft metal tube is deformed by the swing of the soft metal tube, and a permanent compression is generated to cause leakage of fluid such as liquid or gas flowing through the soft metal tube. There is a problem that the occurrence of cracks easily occurs. Since the washer is loosely fitted to the soft metal pipe, the washer easily moves in the length direction of the soft metal pipe during the connection operation with the connecting portion, and thus has a problem that the connection workability is poor. In the pipe connection structure (b), since the washer is loosely fitted to the soft metal pipe, the soft metal pipe is likely to swing due to fluctuations in the internal pressure of the soft metal pipe, etc. Since the contact portion is in contact with the upper portion of the upper bead portion, stress is concentrated on the upper bead portion, cracks are easily generated in the bead portion, and the durability of the soft metal pipe is lacking. Further, the O-ring in contact with the connecting portion and the soft metal pipe is deformed by the swinging of the soft metal pipe, and a permanent compression set is generated, so that leakage of liquid or gas flowing in the soft metal pipe easily occurs. Had. Since the backup ring is mounted, it takes time and effort to form two bead portions on the soft metal pipe, and also requires time and effort to mount the backup ring, and the connection workability of the soft metal pipe is poor. In addition, a backup ring is required during pipe connection work, which increases the number of parts required for pipe connection, and the washer is loosely fitted to the soft metal pipe so that the washer can move easily in the length direction of the soft metal pipe. There was a problem that workability was lacking. In the pipe connection structure of No. C, the structure of the pipe connection is complicated, it takes time to manufacture the pipe connection and lacks productivity, and the time required to weld and fix the pipe connection to the soft metal pipe is required. There was a problem that connection workability was lacking.
In addition, there is a problem that thermal distortion due to welding remains, mechanical strength is locally deteriorated, and durability is lacking.
【０００６】本発明は上記従来の課題を解決するもの
で、銅管やアルミニウム管等の軟質金属製管の内圧の変
動等による軟質金属製管の揺動を防止でき、軟質金属製
管の割れ等の破損を防止して耐久性を向上できるととも
に、簡単な構造で管接続具の生産性や接続作業性に優れ
た管接続構造の提供、及び、管接続具を軟質金属製管に
容易に装着でき接続作業の作業工数を著しく短縮できる
とともに、軟質金属製管の接続作業性に優れた管接続方
法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and can prevent the soft metal tube from swinging due to a change in the internal pressure of the soft metal tube such as a copper tube or an aluminum tube, and can prevent the soft metal tube from cracking. It is possible to improve the durability by preventing breakage of the pipe connection, etc., to provide a pipe connection structure with a simple structure and excellent productivity and connection workability of the pipe connection tool, and to easily connect the pipe connection tool to a soft metal pipe. An object of the present invention is to provide a pipe connecting method which can be attached and can significantly reduce the number of steps of a connecting operation, and is excellent in connection workability of a soft metal pipe.
【０００７】[0007]
【課題を解決するための手段】上記従来の課題を解決す
るために本発明における管接続構造は、銅管やアルミニ
ウム管等の軟質金属製管の端部を接続する管接続構造で
あって、軟質金属製管と、軟質金属製管に外嵌され軟質
金属製管の外周面と圧着又は圧接される短管部及び短管
部の一端部に短管部と略直角方向に延設されたフランジ
部とを有した管接続具と、を備えた構成を有している。
この構成により、管接続具の短管部を軟質金属製管に外
嵌して短管部と軟質金属製管を圧着又は圧接することに
より、管接続具と軟質金属製管を面接触で固定でき、軟
質金属製管の内圧の変動等により軟質金属製管が揺動す
るのを防止できるという作用を有する。また、短管部で
軟質金属製管と面接触させて管接続具を固定できるた
め、軟質金属製管の所定部に応力が集中するのを防止で
き軟質金属製管の割れ等の破損を防止でき、軟質金属製
管の耐久性を向上できるという作用を有する。また、管
接続具が、短管部とフランジ部とで形成されているた
め、管接続具の構造が簡単でプレス加工等により容易に
作製でき管接続具の生産性を向上できるという作用を有
する。In order to solve the above-mentioned conventional problems, a pipe connection structure according to the present invention is a pipe connection structure for connecting ends of a soft metal pipe such as a copper pipe or an aluminum pipe. A soft metal tube, a short tube portion which is fitted onto the soft metal tube and crimped or pressed against the outer peripheral surface of the soft metal tube, and is provided at one end of the short tube portion in a direction substantially perpendicular to the short tube portion. And a pipe connector having a flange portion.
With this configuration, the short pipe part of the pipe fitting is externally fitted to the soft metal pipe, and the short pipe part and the soft metal pipe are crimped or pressed to fix the pipe fitting and the soft metal pipe in surface contact. It is possible to prevent the soft metal pipe from swinging due to a change in the internal pressure of the soft metal pipe. In addition, since the short pipe part can be in surface contact with the soft metal pipe to fix the pipe fitting, stress can be prevented from concentrating on a predetermined part of the soft metal pipe and breakage of the soft metal pipe, such as cracking, can be prevented. This has the effect of improving the durability of the soft metal pipe. Further, since the pipe connector is formed by the short pipe portion and the flange portion, the structure of the pipe connector is simple and has an effect that it can be easily manufactured by press working or the like and the productivity of the pipe connector can be improved. .
【０００８】また、本発明における管接続方法は、銅管
やアルミニウム管等の軟質金属製管の端部を接続部に接
続する管接続方法であって、管接続具を軟質金属製管に
外嵌し軟質金属製管の所定部を拡管させて管接続具の短
管部の内周壁と軟質金属製管の外周面を圧着又は圧接す
る管接続具装着工程と、管接続具のフランジ部の下部も
しくはＵ字溝部の下面にＯリング等の密封具を配設し管
接続具と接続部を固定して軟質金属製管と接続部を接続
する接続工程と、を備えた構成を有している。これによ
り、管接続具装着工程で軟質金属製管に管接続具の短管
部を外嵌して軟質金属製管を拡管させるだけで短管部と
軟質金属製管を圧着又は圧接して面接触で固定すること
ができ、管接続具を軟質金属製管に容易に装着できると
いう作用を有する。また、管接続具が軟質金属製管に確
実に固定されるため、管接続具が軟質金属製管の所定部
から移動するのを防止でき、軟質金属製管と接続部との
接続工程が容易にでき接続作業性を向上できるという作
用を有する。The pipe connecting method according to the present invention is a pipe connecting method for connecting an end portion of a soft metal pipe such as a copper pipe or an aluminum pipe to a connecting portion, wherein a pipe connecting tool is connected to the soft metal pipe. A pipe connector mounting step of crimping or pressing the inner peripheral wall of the short pipe portion of the pipe connector and the outer peripheral surface of the soft metal pipe by expanding a predetermined portion of the fitted soft metal pipe, and forming a flange portion of the pipe connector. A connecting step of arranging a sealing device such as an O-ring on the lower portion or the lower surface of the U-shaped groove portion, fixing the pipe connecting device and the connecting portion, and connecting the soft metal pipe and the connecting portion. I have. In this way, the short pipe portion and the soft metal pipe are crimped or pressed into contact with each other only by externally fitting the short pipe portion of the pipe connector to the soft metal pipe in the pipe fitting mounting step and expanding the soft metal pipe. It can be fixed by contact, and has the effect that the pipe connector can be easily attached to the soft metal pipe. In addition, since the pipe fitting is securely fixed to the soft metal pipe, the pipe fitting can be prevented from moving from a predetermined portion of the soft metal pipe, and the connecting process between the soft metal pipe and the connecting portion is easy. This has the effect of improving connection workability.
【０００９】[0009]
【発明の実施の形態】本発明の請求項１に記載の管接続
構造は、銅管やアルミニウム管等の軟質金属製管の端部
を接続する管接続構造であって、前記軟質金属製管と、
前記軟質金属製管に外嵌され前記軟質金属製管の外周面
と圧着又は圧接される短管部及び前記短管部の一端部に
前記短管部と略直角方向に延設されたフランジ部とを有
した管接続具と、を備えた構成を有している。これによ
り、管接続具の短管部を軟質金属製管に外嵌し圧着又は
圧接することにより、管接続具と軟質金属製管を面接触
で固定でき、短管部で軟質金属製管の補強ができるとと
もに、軟質金属製管の内圧の変動等により軟質金属製管
が揺動するのを防止できるという作用を有する。また、
管接続具を短管部で軟質金属製管と面接触で固定できる
ため、軟質金属製管の所定部に応力が集中するのを防止
でき、軟質金属製管の割れ等の破損を防止し耐久性を向
上できるという作用を有する。また、管接続具が、短管
部とフランジ部とで形成されているため、管接続具の構
造が簡単でプレス加工等により容易に作製でき管接続具
の生産性を向上できるという作用を有する。管接続具を
軟質金属製管の外周面に圧着又は圧接して固定できるた
め、軟質金属製管の接続側の端部にビーディングにより
形成されたビード部を有していない軟質金属製管にも該
管接続具を容易に固定でき、該管接続具を任意の軟質金
属製管の接続に利用できるという作用を有する。ここ
で、管接続具としては、樹脂やステンレス鋼等の金属で
形成され、射出成形やダイカスト，ロストワックス法に
よる鋳造，鍛造，プレス加工等で成形される。また、フ
ランジ部としては、軟質金属製管を接続する接続部と固
定できるネジ孔等の固定部を形成してもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The pipe connection structure according to the first aspect of the present invention is a pipe connection structure for connecting ends of a soft metal pipe such as a copper pipe or an aluminum pipe, wherein the soft metal pipe is connected. When,
A short tube portion which is fitted to the soft metal tube and is pressed or pressed against the outer peripheral surface of the soft metal tube, and a flange portion extending at one end of the short tube portion in a direction substantially perpendicular to the short tube portion. And a pipe connector having the following. With this, the pipe fitting and the soft metal pipe can be fixed in surface contact by externally fitting the short pipe part of the pipe fitting to the soft metal pipe and crimping or press-fitting, and the soft metal pipe can be fixed at the short pipe part. It has the effect of being able to reinforce and to be able to prevent the soft metal pipe from swinging due to fluctuations in the internal pressure of the soft metal pipe. Also,
Since the pipe fitting can be fixed in short contact with the soft metal pipe by surface contact, stress can be prevented from concentrating on a predetermined part of the soft metal pipe, and the soft metal pipe can be prevented from breaking, such as cracking, and durable. It has the effect of improving the performance. Further, since the pipe connector is formed by the short pipe portion and the flange portion, the structure of the pipe connector is simple and has an effect that it can be easily manufactured by press working or the like and the productivity of the pipe connector can be improved. . Since the pipe connector can be fixed by pressing or pressing against the outer peripheral surface of the soft metal pipe, the soft metal pipe having no bead portion formed by beading at the connection side end of the soft metal pipe can be used. This also has an effect that the pipe connector can be easily fixed, and the pipe connector can be used for connecting any soft metal pipe. Here, the pipe connector is made of a metal such as resin or stainless steel, and is formed by injection molding, die casting, casting by a lost wax method, forging, press working, or the like. Further, as the flange portion, a fixing portion such as a screw hole which can be fixed to a connection portion for connecting the soft metal pipe may be formed.
【００１０】本発明の請求項２に記載の管接続構造は、
請求項１に記載の発明において、前記管接続具の前記フ
ランジ部の基部に、前記軟質金属製管の外周面に沿って
凹状に形成されたＵ字溝部を備えた構成を有している。
これにより、管接続具を軟質金属製管に装着してＵ字溝
部の下面にＯリング等の密封具を配設した際に、Ｕ字溝
部をバックアップリングとして使用でき、Ｏリング等の
密封具が変形して間隙部に食い込むのを防止できるとい
う作用を有する。[0010] The pipe connection structure according to a second aspect of the present invention,
In the invention described in claim 1, the base of the flange portion of the pipe connector has a U-shaped groove formed in a concave shape along the outer peripheral surface of the soft metal pipe.
With this, when the pipe connector is mounted on the soft metal pipe and a seal such as an O-ring is provided on the lower surface of the U-shaped groove, the U-shaped groove can be used as a backup ring, and the seal such as an O-ring can be used. Has the effect of preventing deformation and penetration into the gap.
【００１１】本発明の請求項３に記載の管接続方法は、
銅管やアルミニウム管等の軟質金属製管の端部を接続部
に接続する管接続方法であって、前記管接続具を前記軟
質金属製管に外嵌し前記軟質金属製管の所定部を拡管さ
せて前記管接続具の前記短管部の内周壁と前記軟質金属
製管の外周面を圧着又は圧接する管接続具装着工程と、
前記管接続具の前記フランジ部の下部もしくは前記Ｕ字
溝部の下面にＯリング等の密封具を配設し前記管接続具
と前記接続部を固定して前記軟質金属製管と前記接続部
を接続する接続工程と、を備えた構成を有している。こ
れにより、管接続具装着工程で軟質金属製管を拡管させ
るだけで短管部と軟質金属製管を圧着又は圧接して管接
続具を軟質金属製管の所定部に容易に装着できるととも
に、管接続具を軟質金属製管に確実に固定できるため、
管接続具を接続部に固定する接続工程で管接続具が移動
するのを防止でき接続作業性を向上できるという作用を
有する。ここで、管接続具装着工程において軟質金属製
管を拡管する場合、管接続具の短管部との当接部だけを
拡管するのが好ましい。これにより、軟質金属製管に装
着するＯリング等の密封具の寸法管理が容易にできる。
また、管接続具装着工程において、軟質金属製管の端部
から拡管治具を圧入して軟質金属製管の所定部を拡管し
てもよい。[0011] The pipe connection method according to claim 3 of the present invention comprises:
A pipe connection method for connecting an end of a soft metal pipe such as a copper pipe or an aluminum pipe to a connection portion, wherein the pipe connection tool is externally fitted to the soft metal pipe and a predetermined portion of the soft metal pipe is connected. A pipe fitting mounting step of expanding and crimping or pressing the inner peripheral wall of the short pipe portion of the pipe fitting and the outer peripheral surface of the soft metal pipe,
A sealing device such as an O-ring is provided at a lower portion of the flange portion or a lower surface of the U-shaped groove portion of the pipe connecting device, and the pipe connecting device and the connecting portion are fixed to connect the soft metal pipe and the connecting portion. And a connecting step of connecting. Thereby, the pipe fitting can be easily attached to a predetermined portion of the soft metal pipe by crimping or pressing the short pipe portion and the soft metal pipe just by expanding the soft metal pipe in the pipe fitting attaching step, Since the pipe fitting can be securely fixed to the soft metal pipe,
This has the effect of preventing the pipe connector from moving in the connecting step of fixing the pipe connector to the connection part, and improving the connection workability. Here, when expanding the soft metal pipe in the pipe fitting mounting step, it is preferable to expand only the contact portion of the pipe fitting with the short pipe portion. This facilitates dimensional control of a sealing device such as an O-ring mounted on the soft metal tube.
Further, in the pipe fitting mounting step, a predetermined portion of the soft metal pipe may be expanded by press-fitting a pipe expanding jig from an end of the soft metal pipe.
【００１２】本発明の請求項４に記載の管接続方法は、
請求項３に記載の発明において、前記管接続具装着工程
が、前記軟質金属製管の内部に複数に分割された割子部
を有した拡開具を挿入する拡開具挿入工程と、前記拡開
具の略中央に拡開挿通具を挿通させて前記軟質金属製管
の所定部を拡管する拡管工程と、を備えた構成を有して
いる。これにより、管接続具装着工程において、複数に
分割された割子部を有した拡開具を軟質金属製管に挿入
して割子部の略中央に拡開挿通具を挿通するだけで割子
部を軟質金属製管に押しつけるとともに軟質金属製管を
拡管することができ、管接続具を軟質金属製管に確実に
装着できるという作用を有する。ここで、割子部の略中
央を円錐状や円錐台状に形成、及び／又は、拡開具に逆
円錐状部や逆円錐台状部を形成するのが好ましい。これ
により、拡開具の中央に拡開挿通具を挿通する際に、円
錐状や円錐台状の外周面に沿って拡開挿通具を容易に拡
開具の中央に挿通することができる。[0012] The pipe connection method according to claim 4 of the present invention is characterized in that:
4. The invention according to claim 3, wherein the pipe connector mounting step includes the step of inserting a spreader having a split portion divided into a plurality of portions inside the soft metal pipe, and the spreader. And an expanding step of expanding a predetermined portion of the soft metal pipe by inserting an expanding insertion tool into substantially the center of the soft metal pipe. Thereby, in the pipe fitting mounting step, the spreader having the split part divided into a plurality of pieces is inserted into the soft metal pipe, and the spreader is simply inserted through substantially the center of the splitter part. The portion can be pressed against the soft metal pipe and the soft metal pipe can be expanded, so that the pipe connector can be securely attached to the soft metal pipe. Here, it is preferable to form the approximate center of the split portion in a conical shape or a truncated cone shape and / or to form an inverted conical portion or an inverted truncated conical portion on the spreader. Thereby, when inserting the expansion insertion tool into the center of the expansion tool, the expansion insertion tool can be easily inserted into the center of the expansion tool along the conical or frustoconical outer peripheral surface.
【００１３】本発明の請求項５に記載の管接続方法は、
請求項３に記載の発明において、前記管接続具装着工程
が、前記軟質金属製管の内部にウレタンゴムやシリコン
ゴム等の合成ゴム等からなる弾性体を挿入する弾性体挿
入工程と、前記弾性体を加圧して前記軟質金属製管の所
定部を拡管する拡管工程と、を備えた構成を有してい
る。これにより、管接続具装着工程において、弾性体を
軟質金属製管に挿入して加圧するだけで弾性体の膨張に
ともない軟質金属製管を拡管することができ、軟質金属
製管の所定部だけを容易に拡管することができるととも
に、管接続具を軟質金属製管の所定部に確実に装着でき
るという作用を有する。[0013] The pipe connection method according to claim 5 of the present invention is characterized in that:
4. The invention according to claim 3, wherein the pipe fitting mounting step comprises: inserting an elastic body made of synthetic rubber such as urethane rubber or silicon rubber into the soft metal pipe; Expanding the predetermined portion of the soft metal pipe by pressurizing the body. Thereby, in the pipe fitting mounting step, the soft metal pipe can be expanded with the expansion of the elastic body only by inserting the elastic body into the soft metal pipe and applying pressure, and only a predetermined portion of the soft metal pipe can be expanded. Can be easily expanded, and the pipe connector can be securely attached to a predetermined portion of the soft metal pipe.
【００１４】（実施の形態１）本発明における管接続構
造の実施の形態１について、以下図面を用いて説明す
る。図１は実施の形態１における管接続構造の要部断面
図であり、図２はビード部を有していない軟質金属製管
を用いた場合の実施の形態１における管接続構造の要部
断面図である。尚、従来例の図６（ａ），（ｂ）と同様
のものには同一の符号を付して説明を省略する。図１，
図２において、１は実施の形態１における管接続具、１
ａは銅管やアルミニウム管等の軟質金属製管１０に外嵌
された管接続具１の短管部、１ｂは短管部１ａの一端部
に短管部１ａの長さ方向と略直角方向に延設されたフラ
ンジ部、１０′は外周壁にビード部を有していない軟質
金属製管である。以上のように構成された実施の形態１
の管接続構造について、以下その管接続方法について、
図面を用いて説明する。図３は実施の形態１における管
接続具の管接続方法の内、管接続具装着工程を示す要部
断面図である。図３において、２は軟質金属製管１０の
内部に挿入され軟質金属製管１０の所定部を拡管する拡
開具、２ａは拡開具２の上部に複数に分割して形成され
た割子部、２ｂは拡開具２の割子部２ａの略中央に略円
錐台状に穿設された挿通部、３は拡開具２の挿通部２ｂ
に挿通され割子部２ａを拡開して軟質金属製管１０を拡
開する拡開挿通具、３ａは拡開具３の上端部に略円錐台
状に形成された拡管部、４は管接続具１の短管部１ａと
当接する軟質金属製管１０の外周壁の当接部、矢印Ａ，
Ｃは拡開挿通具３の移動方向、矢印Ｂは拡開具２の移動
方向である。管接続具装着工程の拡開具挿入工程におい
て、軟質金属製管１０の内部に拡開具２を挿入するとと
もに、図３に示すように、管接続具１の短管部１ａを軟
質金属製管１０に外嵌してビード部１０ａの上側部に当
接させ軟質金属製管１０の当接部４に短管部１ａを配設
する。次に、拡管工程において、拡開挿通具３を、図３
に示すように、移動方向Ａ側へ移動させて拡管部３ａを
拡開具２の挿通部２ｂに挿通し、拡管部３ａで拡開具２
の割子部２ａを移動方向Ｂへ押し広げるとともに軟質金
属製管１０の当接部４を拡管し、短管部１ａに圧接して
管接続具１を軟質金属製管１０に装着した後、拡開挿通
具３を移動方向Ｃへ移動させて拡開具２の挿通部２ｂか
ら取り外すとともに、拡開具２を軟質金属製管１０から
取り出す。次いで、接続工程において、管接続具１のフ
ランジ部１ｂの下部の軟質金属製管１０のビード部１０
ａの下側部にＯリング１２を装着した後、図１に示すよ
うに、軟質金属製管１０を接続部１１に嵌挿し、係止具
１４で管接続具１のフランジ部１ｂと接続部１１の接続
固定部１１ａを係止して軟質金属製管１０を接続部１１
に接続する。(Embodiment 1) Embodiment 1 of a pipe connection structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of the pipe connection structure according to the first embodiment, and FIG. 2 is a cross-sectional view of a main part of the pipe connection structure according to the first embodiment when a soft metal pipe having no bead portion is used. FIG. 6 (a) and 6 (b) of the conventional example are denoted by the same reference numerals and description thereof will be omitted. Figure 1
In FIG. 2, reference numeral 1 denotes a pipe connector according to the first embodiment,
a is a short pipe portion of the pipe connector 1 externally fitted to a soft metal pipe 10 such as a copper pipe or an aluminum pipe, and 1b is provided at one end of the short pipe section 1a in a direction substantially perpendicular to the length direction of the short pipe section 1a. The flange portion 10 'is a soft metal tube having no bead portion on the outer peripheral wall. Embodiment 1 configured as above
About the pipe connection structure of the following, about the pipe connection method,
This will be described with reference to the drawings. FIG. 3 is a cross-sectional view of a main part showing a pipe fitting mounting step in the pipe connecting method of the pipe fitting in the first embodiment. In FIG. 3, reference numeral 2 denotes a spreader that is inserted into the soft metal pipe 10 and expands a predetermined portion of the soft metal pipe 10, 2 a denotes a splitter portion formed by dividing the upper part of the spreader 2 into a plurality, Reference numeral 2b denotes an insertion portion which is formed substantially in the shape of a truncated cone at substantially the center of the split portion 2a of the spreader 2, and 3 denotes an insertion portion 2b of the spreader 2.
The expansion tool 3a is formed in a substantially frustoconical shape at the upper end of the expansion tool 3, and the pipe connection 4 is formed. Abutting portion of the outer peripheral wall of the soft metal tube 10 in contact with the short tube portion 1a of the tool 1;
C is the moving direction of the expanding insertion device 3, and arrow B is the moving direction of the expanding device 2. In the expansion tool insertion step of the pipe connection tool mounting step, the expansion tool 2 is inserted into the inside of the soft metal pipe 10, and the short pipe section 1a of the pipe connection tool 1 is connected to the soft metal pipe 10 as shown in FIG. And the short tube portion 1a is disposed at the contact portion 4 of the soft metal tube 10 by being fitted to the upper portion of the bead portion 10a. Next, in the pipe expanding step, the expanding insertion tool 3 is
As shown in the figure, the tube is moved in the movement direction A, and the expanded tube portion 3a is inserted through the insertion portion 2b of the expanding device 2.
After spreading the splitter portion 2a in the moving direction B, expanding the abutting portion 4 of the soft metal tube 10, pressing the short pipe portion 1a and attaching the pipe connector 1 to the soft metal tube 10, The spreader 3 is moved in the moving direction C to be removed from the insertion portion 2b of the spreader 2, and the spreader 2 is removed from the soft metal tube 10. Next, in the connection step, the bead portion 10 of the soft metal pipe 10 below the flange portion 1b of the pipe connector 1 is connected.
After the O-ring 12 is attached to the lower side of a, as shown in FIG. 1, a soft metal tube 10 is inserted into the connection portion 11, and the flange portion 1 b of the pipe connection device 1 is connected to the connection portion with the locking device 14. 11 to secure the soft metal tube 10 to the connecting portion 11a.
Connect to
【００１５】以上のように実施の形態１における管接続
構造及び管接続方法は構成されているので、以下の作用
を有する。管接続部が軟質金属製管に圧着又は圧接され
る短管部を備えているため、管接続具の短管部を軟質金
属製管に面接触で固定でき、その結果短管部で軟質金属
製管の固定部を補強し堅固な接合構造が得られるととも
に、補強部を有するので強い接合強度が得られ、その接
合強度で軟質金属製管接合しているので、軟質金属製管
の内圧の変動等により振動等の外圧を受けても軟質金属
製管が揺動するのを防止できるという作用を有する。管
接続具を短管部で軟質金属製管と面接触で固定できるた
め、軟質金属製管の所定部に応力が集中するのを防止で
き、軟質金属製管の割れ等の破損を防止し軟質金属製管
の耐久性を向上できるという作用を有する。管接続具
が、短管部とフランジ部とで形成されているため、管接
続具の構造が簡単でプレス加工等により容易に作製でき
管接続具の生産性を向上できるという作用を有する。管
接続具装着工程の拡開具挿入工程で、複数に分割された
割子部を有した拡開具を軟質金属製管に挿入し、拡管工
程で拡開挿通具を割子部の略中央の挿通部に挿通するだ
けで、軟質金属製管を拡管して管接続具の短管部を軟質
金属製管に容易に装着できるという作用を有する。管接
続具装着工程で管接続具を軟質金属製管に固定できるた
め、管接続具と接続部を固定する接続工程で管接続具が
移動するのを防止でき接続作業性を向上できるととも
に、外周壁にビード部を有していない軟質金属製管に
も、管接続具の短管部を軟質金属製管の所定部に圧接し
て容易に固着でき、管接続具が軟質金属製管で移動する
のを防止できるという作用を有する。As described above, the pipe connection structure and the pipe connection method according to the first embodiment have the following functions. Since the pipe connection section has a short pipe section that is pressed or pressed against the soft metal pipe, the short pipe section of the pipe connection tool can be fixed to the soft metal pipe by surface contact, and as a result, the soft metal pipe can be connected to the short pipe section. In addition to reinforcing the fixed part of the pipe making pipe, a solid joint structure can be obtained, and since it has a reinforcing part, strong joining strength is obtained, and the soft metal pipe is joined with the joining strength, so the internal pressure of the soft metal pipe can be reduced. This has the function of preventing the soft metal tube from swinging even when subjected to external pressure such as vibration due to fluctuations or the like. Since the pipe fitting can be fixed in surface contact with the soft metal pipe at the short pipe section, it is possible to prevent stress from concentrating on a predetermined section of the soft metal pipe, and to prevent breakage of the soft metal pipe such as cracks and the like. This has the effect of improving the durability of the metal tube. Since the pipe connector is formed by the short pipe portion and the flange portion, the structure of the pipe connector is simple, and the pipe connector can be easily manufactured by press working or the like, and has an effect that the productivity of the pipe connector can be improved. In the expansion tool insertion step of the pipe connection fitting mounting step, the expansion tool having the split part divided into a plurality of pieces is inserted into the soft metal pipe, and the expansion insertion tool is inserted substantially in the center of the split part in the pipe expansion step. By simply inserting the flexible metal pipe into the flexible metal pipe, the short pipe section of the pipe connector can be easily attached to the soft metal pipe. Since the pipe fitting can be fixed to the soft metal pipe in the pipe fitting mounting step, it is possible to prevent the pipe fitting from moving in the connecting step of fixing the pipe fitting and the connection portion, thereby improving the connection workability and improving the outer circumference. The short pipe part of the pipe fitting can be easily fixed to the soft metal pipe with no bead on the wall by pressing the short pipe part to the predetermined part of the soft metal pipe, and the pipe fitting moves with the soft metal pipe. It has the effect that it can prevent that.
【００１６】（実施の形態２）本発明における管接続構
造の実施の形態２について、以下図面を用いて説明す
る。図４は実施の形態２における管接続構造の要部断面
図である。尚、図１又は図６（ｂ）と同様のものには同
一の符号を付して説明を省略する。図４において、５は
実施の形態２における管接続具、５ａは銅管やアルミニ
ウム管等の軟質金属製管１０に外嵌された管接続具５の
短管部、５ｂは短管部５ａの一端部に短管部５ａの長さ
方向と略直角方向に延設されたフランジ部、５ｃはフラ
ンジ部５ｂの基部に軟質金属製管１０の外周面に沿って
凹状に形成されたＵ字溝部である。以上のように構成さ
れた実施の形態２の管接続構造において、弾性体を用い
た管接続方法について、図面を用いて説明する。図５は
実施の形態２における管接続方法の管接続具装着工程を
示す要部断面図である。図５において、６は軟質金属製
管１０の内部に挿入された筒状の弾性体、７は筒状の弾
性体６の略中央に挿通された心棒、７ａは心棒７の外周
側に配設され上端部が弾性体６の下端部に当接された支
持具、８は心棒７に外嵌され弾性体６の上端部に当接さ
れたワッシャ等からなる圧縮具、９は心棒７の上端部に
配設され圧縮具８を固定したナット等からなる固定具、
矢印Ｄは心棒７の移動方向、矢印Ｅは弾性体６の膨張方
向である。管接続具装着工程の弾性体挿入工程におい
て、図５に示すように、軟質金属製管１０の内部に心棒
７に外嵌された支持具７ａの上部に配設された弾性体６
を挿入するとともに、軟質金属製管１０のビード部１０
ａの上側部に所定の距離をあけて管接続具５の短管部５
ａを軟質金属製管１０に外嵌する。次に、拡管工程にお
いて、心棒７を移動方向Ｄへ移動させることにより、圧
縮具８で弾性体６が加圧され、圧縮具８と支持具７ａの
間で弾性体６が圧縮されて膨張方向Ｅへ弾性体６が膨張
するとともに、軟質金属製管１０を押し広げ、軟質金属
製管１０の当接部４と短管部５ａを圧接して管接続具５
を軟質金属製管１０に装着する。次に、弾性体６の膨張
を緩めて弾性体６及び心棒７等を軟質金属製管１０から
取り外す。管接続具５と軟質金属製管１０を固着した
後、Ｏリング１２を軟質金属製管１０の管接続具５のＵ
字溝部の下方に装着する。次いで、接続工程において、
軟質金属製管１０を接続部１１に嵌挿し、ネジ１６で管
接続具５のフランジ部５ｂと接続部１１の接続固定部１
１ａを固定して軟質金属製管１０を接続部１１に接続す
る。(Embodiment 2) Embodiment 2 of the pipe connection structure of the present invention will be described below with reference to the drawings. FIG. 4 is a sectional view of a main part of the pipe connection structure according to the second embodiment. Note that the same components as those in FIG. 1 or FIG. 6B are denoted by the same reference numerals, and description thereof is omitted. In FIG. 4, reference numeral 5 denotes a pipe connector according to the second embodiment, 5a denotes a short pipe portion of the pipe connector 5 externally fitted to a soft metal pipe 10 such as a copper pipe or an aluminum pipe, and 5b denotes a short pipe section 5a. A flange portion 5c extended at one end in a direction substantially perpendicular to the length direction of the short tube portion 5a is a U-shaped groove portion formed at the base of the flange portion 5b along the outer peripheral surface of the soft metal pipe 10 in a concave shape. It is. In the pipe connection structure of the second embodiment configured as described above, a pipe connection method using an elastic body will be described with reference to the drawings. FIG. 5 is a cross-sectional view of a main part showing a pipe connector mounting process of the pipe connection method according to the second embodiment. In FIG. 5, reference numeral 6 denotes a cylindrical elastic body inserted into a soft metal tube 10, reference numeral 7 denotes a mandrel inserted substantially in the center of the cylindrical elastic body 6, and reference numeral 7a denotes an outer peripheral side of the mandrel 7. A support tool whose upper end is in contact with the lower end of the elastic body 6, 8 is a compression tool made of a washer or the like fitted around the mandrel 7 and in contact with the upper end of the elastic body 6, 9 is the upper end of the mandrel 7 A fixing member comprising a nut or the like which is disposed on the portion and fixes the compression device 8,
Arrow D indicates the direction in which the mandrel 7 moves, and arrow E indicates the direction in which the elastic body 6 expands. As shown in FIG. 5, in the elastic body inserting step of the pipe fitting mounting step, the elastic body 6 disposed on the upper part of the support member 7a externally fitted to the mandrel 7 inside the soft metal pipe 10.
And the bead portion 10 of the soft metal tube 10
a short pipe part 5 of the pipe connector 5
a is externally fitted to the soft metal tube 10. Next, in the pipe expanding step, the mandrel 7 is moved in the moving direction D, so that the elastic body 6 is pressurized by the compression tool 8, and the elastic body 6 is compressed between the compression tool 8 and the support tool 7 a to expand in the expansion direction. As the elastic body 6 expands to E, the soft metal pipe 10 is pushed and spread, and the contact part 4 of the soft metal pipe 10 and the short pipe part 5a are pressed against each other to connect the pipe fitting 5
Is attached to the soft metal tube 10. Next, the expansion of the elastic body 6 is relaxed, and the elastic body 6 and the mandrel 7 are removed from the soft metal tube 10. After fixing the pipe connector 5 and the soft metal pipe 10, the O-ring 12 is attached to the U of the pipe connector 5 of the soft metal pipe 10.
Attach below the groove. Then, in the connecting step,
The soft metal pipe 10 is inserted into the connection part 11, and the flange part 5 b of the pipe connection tool 5 and the connection fixing part 1 of the connection part 11 are screwed 16.
1a is fixed, and the soft metal tube 10 is connected to the connection portion 11.
【００１７】以上のように実施の形態２における管接続
構造及び管接続方法は構成されているため、実施の形態
１における作用に加えて、以下の作用を有する。管接続
具に軟質金属製管の外周面に沿って形成されたＵ字溝部
を備えているため、Ｕ字溝部をバックアップリングとし
て使用でき、Ｕ字溝部の下方に配設したＯリングが変形
して軟質金属製管と接続部との間隙部に食い込むのを防
止できるという作用を有する。管接続具装着工程の弾性
体挿入工程で、弾性体を軟質金属製管に挿入し、拡管工
程で弾性体を加圧するだけで軟質金属製管の当接部を拡
管して管接続具の短管部と軟質金属製管を容易に固定で
きるという作用を有する。Since the pipe connection structure and the pipe connection method according to the second embodiment are configured as described above, the following functions are provided in addition to the functions according to the first embodiment. Since the pipe connector has a U-shaped groove formed along the outer peripheral surface of the soft metal pipe, the U-shaped groove can be used as a backup ring, and the O-ring disposed below the U-shaped groove is deformed. Thus, it is possible to prevent the gap between the soft metal pipe and the connection portion from being cut into the gap. In the elastic body insertion step of the pipe fitting mounting step, the elastic body is inserted into the soft metal pipe, and in the expanding step, the abutting portion of the soft metal pipe is expanded by simply pressing the elastic body to shorten the pipe fitting. This has the effect that the tube portion and the soft metal tube can be easily fixed.
【００１８】[0018]
【発明の効果】以上のように本発明における管接続構造
によれば、以下の優れた効果を実現できる。請求項１に
記載の管接続構造によれば、 （１）管接続具が短管部とフランジ部を備えているた
め、管接続具の短管部を軟質金属製管に圧着又は圧接し
て管接続具と軟質金属製管を面接触で固定でき、その結
果、軟質金属製管と短管部で強い接合強度を得ることが
でき、短管部で軟質金属製管の補強ができるとともに、
軟質金属製管の内圧の変動等により振動等の外圧を受け
ても軟質金属製管が揺動するのを防止でき、軟質金属製
管の耐久性を向上できる。 （２）管接続具を短管部で軟質金属製管と面接触で固定
できるため、管接続具と軟質金属製管の当接部等の軟質
金属製管の所定部に応力が集中するのを防止でき、軟質
金属製管の割れ等の破損を防止し軟質金属製管の耐久性
を向上できる。 （３）軟質金属製管の揺動を防止できるため、軟質金属
製管に装着したＯリングの圧縮永久歪みを防止できＯリ
ングの復元力を維持することができ、耐久性を向上でき
るとともに、軟質金属製管内を流れる液体や気体等の流
体の漏れを防止でき、接続の信頼性に優れる。 （４）管接続具が、短管部とフランジ部とで形成されて
いるため、管接続具の構造が簡単でプレス加工等により
容易に作製でき管接続具の生産性に優れる。 （５）管接続具を軟質金属製管の外周面に圧着又は圧接
して固定できるため、軟質金属製管の接続側の端部にビ
ーディングにより形成されたビード部を有していない軟
質金属製管にも該管接続具を容易に固定でき、該管接続
具を任意の軟質金属製管の接続に利用でき汎用性に優れ
る。請求項２に記載の発明によれば、請求項１の効果に
加えて、 （６）管接続具のフランジ部の基部にＵ字溝部を備えて
いるため、Ｕ字溝部の下面にＯリングを配設した際に、
Ｕ字溝部を従来のバックアップリングと同様に使用で
き、Ｏリングが変形して軟質金属製管と接続部との間隙
部にＯリングが食い込むのを防止でき、軟質金属製管内
を流れる流体の漏れを防止できるとともに、Ｏリングの
耐久性に優れる。請求項３に記載の管接続方法によれ
ば、 （７）管接続具装着工程で軟質金属製管を拡管させるだ
けで管接続具の短管部と軟質金属製管を圧着又は圧接し
て管接続具を軟質金属製管の所定部に装着できるととも
に、管接続具を軟質金属製管に確実に固定できるため、
管接続具と接続部を固定する接続工程で管接続具が移動
するのを防止でき接続作業性に優れる。請求項４に記載
の発明によれば、請求項３の効果に加えて、 （８）複数に分割された割子部を有した拡開具を用いて
管接続具を軟質金属製管に装着する場合、管接続具装着
工程で拡開具を軟質金属製管に挿入し、拡開具の略中央
に拡開挿通具を挿通するだけで割子部で容易に軟質金属
製管を拡管することができ、管接続具の装着作業性に優
れる。請求項５に記載の発明によれば、請求項３の効果
に加えて、 （９）弾性体を用いて管接続具を軟質金属製管に装着す
る場合、管接続具装着工程で弾性体を軟質金属製管に挿
入して弾性体を加圧するだけで軟質金属製管の所定部だ
けを容易に拡管することができ、管接続具の装着作業性
に優れる。As described above, according to the pipe connection structure of the present invention, the following excellent effects can be realized. According to the pipe connection structure of the first aspect, (1) Since the pipe connection tool has the short pipe portion and the flange portion, the short pipe portion of the pipe connection tool is crimped or pressed against the soft metal pipe. The pipe fitting and the soft metal pipe can be fixed by surface contact, and as a result, a strong joining strength can be obtained between the soft metal pipe and the short pipe section, and the soft metal pipe can be reinforced with the short pipe section,
Even if the soft metal tube receives external pressure such as vibration due to fluctuations in the internal pressure of the soft metal tube, the soft metal tube can be prevented from swinging, and the durability of the soft metal tube can be improved. (2) Since the pipe fitting can be fixed in surface contact with the soft metal pipe at the short pipe portion, stress is concentrated on a predetermined portion of the soft metal pipe such as the contact portion between the pipe fitting and the soft metal pipe. Can be prevented, breakage of the soft metal pipe such as cracks can be prevented, and the durability of the soft metal pipe can be improved. (3) Since the swinging of the soft metal pipe can be prevented, the compression set of the O-ring mounted on the soft metal pipe can be prevented, the restoring force of the O-ring can be maintained, and the durability can be improved. Leakage of fluid such as liquid or gas flowing in the soft metal pipe can be prevented, and the connection reliability is excellent. (4) Since the pipe connector is formed by the short pipe portion and the flange portion, the structure of the pipe connector is simple and can be easily manufactured by press working or the like, and the productivity of the pipe connector is excellent. (5) Since the pipe connector can be fixed to the outer peripheral surface of the soft metal pipe by crimping or pressure contact, the soft metal pipe does not have a bead portion formed by beading at the connection-side end of the soft metal pipe. The pipe connector can be easily fixed to the pipe making, and the pipe connector can be used for connecting any soft metal pipe, which is excellent in versatility. According to the second aspect of the invention, in addition to the effect of the first aspect, (6) since the base of the flange portion of the pipe connector has the U-shaped groove, the O-ring is provided on the lower surface of the U-shaped groove. When arranging,
The U-shaped groove can be used in the same manner as the conventional backup ring, and the O-ring can be prevented from being deformed and the O-ring digging into the gap between the soft metal pipe and the connection portion, and leakage of fluid flowing through the soft metal pipe can be prevented. Can be prevented, and the durability of the O-ring is excellent. According to the pipe connection method of the third aspect, (7) the short pipe portion of the pipe fitting and the soft metal pipe are crimped or pressed into contact with the pipe just by expanding the soft metal pipe in the pipe fitting mounting step. Since the fitting can be attached to a predetermined portion of the soft metal pipe and the pipe fitting can be securely fixed to the soft metal pipe,
It is possible to prevent the pipe connector from moving in the connecting step of fixing the pipe connector and the connection portion, and thus the connection workability is excellent. According to the fourth aspect of the invention, in addition to the effect of the third aspect, (8) the pipe connector is attached to the soft metal pipe by using an expanding tool having a plurality of splitter portions. In this case, the soft metal pipe can be easily expanded at the splitter simply by inserting the spreader into the soft metal pipe in the pipe fitting mounting step and inserting the spreader through approximately the center of the spreader. Excellent workability of fitting pipe fittings. According to the fifth aspect of the invention, in addition to the effect of the third aspect, (9) when the pipe fitting is mounted on the soft metal pipe using the elastic body, the elastic body is attached in the pipe fitting mounting step. It is possible to easily expand only a predetermined portion of the soft metal pipe simply by inserting it into the soft metal pipe and pressurizing the elastic body, and it is excellent in workability in mounting the pipe connector.
【図１】実施の形態１における管接続構造の要部断面図FIG. 1 is a sectional view of a main part of a pipe connection structure according to a first embodiment.
【図２】ビード部を有していない軟質金属製管を用いた
場合の実施の形態１における管接続構造の要部断面図FIG. 2 is a cross-sectional view of a main part of the pipe connection structure according to the first embodiment when a soft metal pipe having no bead portion is used.
【図３】管接続具装着工程を示す要部断面図FIG. 3 is a sectional view of a main part showing a pipe connection fitting mounting step.
【図４】実施の形態２における管接続構造の要部断面図FIG. 4 is a sectional view of a main part of a pipe connection structure according to a second embodiment.
【図５】実施の形態２における管接続方法の管接続具装
着工程を示す要部断面図FIG. 5 is a cross-sectional view of a main part showing a pipe fitting mounting step of the pipe connection method in the second embodiment.
【図６】（ａ）ワッシャを用いた従来の管接続構造を示
す要部断面図 （ｂ）バックアップリングを用いた従来の管接続構造を
示す要部断面図 （ｃ）管接続具を用いた従来の管接続構造を示す要部断
面図6A is a sectional view of a main part showing a conventional pipe connection structure using a washer. FIG. 6B is a cross-sectional view of a main part showing a conventional pipe connection structure using a backup ring. Sectional view of main part showing conventional pipe connection structure
１ 管接続具 １ａ 短管部 １ｂ フランジ部 ２ 拡開具 ２ａ 割子部 ２ｂ 挿通部 ３ 拡開挿通具 ３ａ 拡管部 ４ 当接部 ５ 管接続具 ５ａ 短管部 ５ｂ フランジ部 ５ｃ Ｕ字溝部 ６ 弾性体 ７ 心棒 ７ａ 支持具 ８ 圧縮具 ９ 固定具 １０ 軟質金属製管 １０ａ，１０ｂ，１０ｃ ビード部 １１ 接続部 １１ａ 接続固定部 １１ｂ Ｏリング嵌挿部 １２ Ｏリング １３ ワッシャ １４ 係止具 １５ バックアップリング １６ ネジ DESCRIPTION OF SYMBOLS 1 Pipe connector 1a Short pipe part 1b Flange part 2 Spreader 2a Splitter part 2b Insertion part 3 Spreader insertion tool 3a Expanded pipe part 4 Contact part 5 Pipe connector 5a Short pipe part 5b Flange part 5c U-shaped groove part 6 Elasticity Body 7 Mandrel 7a Supporting tool 8 Compressor 9 Fixing tool 10 Soft metal pipe 10a, 10b, 10c Bead section 11 Connection section 11a Connection fixing section 11b O-ring fitting section 12 O-ring 13 Washer 14 Locking tool 15 Backup ring 16 screw
Claims (5)
の端部を接続する管接続構造であって、前記軟質金属製
管と、前記軟質金属製管に外嵌され前記軟質金属製管の
外周面と圧着又は圧接される短管部及び前記短管部の一
端部に前記短管部と略直角方向に延設されたフランジ部
とを有した管接続具と、を備えていることを特徴とする
管接続構造。1. A pipe connection structure for connecting an end of a soft metal pipe such as a copper pipe or an aluminum pipe, wherein the soft metal pipe and the soft metal pipe externally fitted to the soft metal pipe. And a pipe connector having a short pipe portion crimped or pressed against an outer peripheral surface of the short pipe portion and a flange portion extending at one end of the short pipe portion in a direction substantially perpendicular to the short pipe portion. A pipe connection structure.
に、前記軟質金属製管の外周面に沿って凹状に形成され
たＵ字溝部を備えていることを特徴とする請求項１に記
載の管接続構造。2. The pipe connection device according to claim 1, further comprising a U-shaped groove formed at a base of the flange portion along the outer peripheral surface of the soft metal pipe. Pipe connection structure.
の端部を接続部に接続する管接続方法であって、前記管
接続具を前記軟質金属製管に外嵌し前記軟質金属製管の
所定部を拡管させて前記管接続具の前記短管部の内周壁
と前記軟質金属製管の外周面を圧着又は圧接する管接続
具装着工程と、前記管接続具の前記フランジ部の下部も
しくは前記Ｕ字溝部の下面にＯリング等の密封具を配設
し前記管接続具と前記接続部を固定して前記軟質金属製
管と前記接続部を接続する接続工程と、を有しているこ
とを特徴とする管接続方法。3. A pipe connection method for connecting an end of a soft metal pipe such as a copper pipe or an aluminum pipe to a connection portion, wherein the pipe fitting is externally fitted to the soft metal pipe. A pipe fitting mounting step of expanding a predetermined portion of the pipe and crimping or pressing the inner peripheral wall of the short pipe portion of the pipe fitting and the outer peripheral surface of the soft metal pipe; and A connecting step of arranging a sealing device such as an O-ring on a lower portion or a lower surface of the U-shaped groove portion, fixing the pipe connecting device and the connecting portion, and connecting the soft metal pipe and the connecting portion. A pipe connection method characterized in that:
製管の内部に複数に分割された割子部を有した拡開具を
挿入する拡開具挿入工程と、前記拡開具の略中央に拡開
挿通具を挿通させて前記軟質金属製管の所定部を拡管す
る拡管工程と、を備えていることを特徴とする請求項３
に記載の管接続方法。4. The pipe connecting device mounting step includes the step of inserting a spreading device having a plurality of splitter portions into the inside of the soft metal pipe, and a step of inserting the expanding device substantially at the center of the expanding device. 4. A pipe expanding step of expanding a predetermined portion of the soft metal pipe by inserting an expanding insertion tool.
The pipe connection method according to 1.
製管の内部にウレタンゴムやシリコンゴム等の合成ゴム
等からなる弾性体を挿入する弾性体挿入工程と、前記弾
性体を加圧して前記軟質金属製管の所定部を拡管する拡
管工程と、を備えていることを特徴とする請求項３に記
載の管接続方法。5. An elastic body inserting step of inserting an elastic body made of synthetic rubber such as urethane rubber or silicon rubber into the soft metal pipe, and pressurizing the elastic body. 4. A pipe connecting method according to claim 3, further comprising: a pipe expanding step of expanding a predetermined portion of the soft metal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10142167A JPH11325350A (en) | 1998-05-08 | 1998-05-08 | Pipe connecting structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10142167A JPH11325350A (en) | 1998-05-08 | 1998-05-08 | Pipe connecting structure and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11325350A true JPH11325350A (en) | 1999-11-26 |
Family
ID=15308923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10142167A Withdrawn JPH11325350A (en) | 1998-05-08 | 1998-05-08 | Pipe connecting structure and method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11325350A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003172491A (en) * | 2001-12-07 | 2003-06-20 | Rinnai Corp | Pipe with double bead |
| JP2006189193A (en) * | 2005-01-06 | 2006-07-20 | Hitachi Home & Life Solutions Inc | Refrigerator |
| KR100827947B1 (en) | 2006-12-27 | 2008-05-08 | 주식회사 에스밸브 | Zero dead leg type tee pipe |
| CN110486554A (en) * | 2019-09-05 | 2019-11-22 | 浙江煜焰工业设计有限公司 | High-intensity sealing type oiling pipe assembly |
-
1998
- 1998-05-08 JP JP10142167A patent/JPH11325350A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003172491A (en) * | 2001-12-07 | 2003-06-20 | Rinnai Corp | Pipe with double bead |
| JP2006189193A (en) * | 2005-01-06 | 2006-07-20 | Hitachi Home & Life Solutions Inc | Refrigerator |
| KR100827947B1 (en) | 2006-12-27 | 2008-05-08 | 주식회사 에스밸브 | Zero dead leg type tee pipe |
| CN110486554A (en) * | 2019-09-05 | 2019-11-22 | 浙江煜焰工业设计有限公司 | High-intensity sealing type oiling pipe assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050802 |