JP2000320754A - Insertion type pipe joint - Google Patents
Insertion type pipe jointInfo
- Publication number
- JP2000320754A JP2000320754A JP11130382A JP13038299A JP2000320754A JP 2000320754 A JP2000320754 A JP 2000320754A JP 11130382 A JP11130382 A JP 11130382A JP 13038299 A JP13038299 A JP 13038299A JP 2000320754 A JP2000320754 A JP 2000320754A
- Authority
- JP
- Japan
- Prior art keywords
- backup ring
- ring
- pipe joint
- plug
- type 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.)
- Pending
Links
Landscapes
- Joints With Sleeves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、管継手、特に抜け
止め環を備え且つ接続管を容易に挿入できる差し込み式
管継手に属する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint, and more particularly to a plug-in type pipe joint having a retaining ring and capable of easily inserting a connecting pipe.
【０００２】[0002]
【従来の技術】水道管及び電線管等の接続の際に、接続
する一方の接続管の先端部を管継手の開口部内に挿入す
るだけで接続できる施工性の良い差し込み式管継手が開
発されている。差し込み式管継手では、内部流体の漏出
又は外部からの浸水に対し液密又は気密に接続管の先端
部と管継手との間を保持するパッキンと、管継手からの
接続管の抜け止めをする円環状の抜け止め環とが受け口
内に装着される。2. Description of the Related Art A plug-in type pipe joint having good workability has been developed which can be connected by simply inserting the tip of one of the connecting pipes into the opening of the pipe joint when connecting a water pipe or a conduit pipe. ing. In the plug-in type pipe joint, packing for holding the gap between the distal end portion of the connection pipe and the pipe joint in a liquid-tight or air-tight manner against leakage of internal fluid or inundation from the outside, and preventing the connection pipe from coming off from the pipe joint. An annular retaining ring is mounted in the receptacle.
【０００３】図２は従来の差し込み式管継手の断面図を
示す。差し込み式管継手(1)は接続管(10)を挿入する開
口部(3)を有する継手本体(2)を有する。継手本体(2)の
端部(4)には開口部(3)に向かって順次縮径するテーパ面
(6)によって形成される傾斜空洞部(5)と、テーパ面(6)
の内側に形成された膨出内面(7)によって形成される環
状空洞部(8)とが設けられる。膨出内面(7)の内側に環状
空洞部(8)が形成され、継手本体(2)の中央部(2a)に連絡
する径方向面(9)が形成される。継手本体(2)の中央部(2
a)には適当な位置に内側フランジ(18)が形成される。FIG. 2 is a sectional view of a conventional plug-in type pipe joint. The plug-in type pipe joint (1) has a joint body (2) having an opening (3) into which a connecting pipe (10) is inserted. The end (4) of the fitting body (2) has a tapered surface that gradually decreases in diameter toward the opening (3).
The inclined cavity (5) formed by (6) and the tapered surface (6)
And an annular cavity portion (8) formed by a bulging inner surface (7) formed inside. An annular cavity (8) is formed inside the bulging inner surface (7), and a radial surface (9) communicating with a central portion (2a) of the joint body (2) is formed. Center part (2
In (a), an inner flange (18) is formed at an appropriate position.
【０００４】突起(12)と共に環状に形成されたゴム製の
パッキン(11)が環状空洞部(8)に配置され、傾斜空洞部
(5)に配置された抜け止め環(13)はパッキン(11)の突起
(12)に当接する。図示しないが、周方向の一個所に切り
欠きが設けられる抜け止め環(13)は拡径及び縮径が可能
である。A rubber packing (11) formed in an annular shape together with the projection (12) is disposed in the annular cavity (8), and the inclined cavity is formed.
The retaining ring (13) located on (5) is a protrusion on the packing (11).
Contact (12). Although not shown, the retaining ring (13) provided with a notch at one location in the circumferential direction can be expanded and reduced in diameter.
【０００５】抜け止め環(13)は、継手本体(2)のテーパ
面(6)に当接する上面(14)と、パッキン(11)の突起(12)
に当接する側面(15)と、傾斜状態で径方向内側に向く内
面(16)とを有する三角断面に形成される。上面(14)はテ
ーパ面(6)に一致する角度で形成される。側面(15)と内
面(16)との挟角によって鋭いエッジ(17)が形成される。[0005] The retaining ring (13) has an upper surface (14) abutting on the tapered surface (6) of the joint body (2) and a projection (12) of the packing (11).
Is formed in a triangular cross section having a side surface (15) abutting on the inner surface and an inner surface (16) facing inward in the radial direction in an inclined state. The upper surface (14) is formed at an angle corresponding to the tapered surface (6). A sharp edge (17) is formed by the included angle between the side surface (15) and the inner surface (16).
【０００６】継手本体(2)に接続される接続管(10)は土
壌中に埋設される外面樹脂被覆鋼管が多用される。防食
の面から、接続管(10)は外面に樹脂被覆層(20)が形成さ
れる。差し込み式管継手(1)によって接続管(10)を接続
する際に、接続管(10)の端部に形成された樹脂被覆層(2
0)を部分的に除去した後、接続管(10)の端部を開口部
(3)内に挿入すると、抜け止め環(13)はパッキン(11)の
円柱状突起(12)により外側に押され、抜け止め環(13)の
上面(14)は常にテーパ面(6)に接する。従って、抜け止
め環(13)の中心軸とテーパ面(6)の中心軸が一致して接
続管(10)を容易に継手本体(2)内に挿入することができ
る。また、抜け止め環(13)を超えて接続管(10)を挿入す
る際に、接続管(10)の端部が抜け止め環(13)の内面(16)
に当接して抜け止め環(13)を拡径すると同時に、抜け止
め環(13)を介してパッキン(11)を圧縮し、内側フランジ
(18)に当接する。同様に、継手本体(2)の反対側の端部
から他の接続管(10)が挿入される。この状態では、継手
本体(2)と接続管(10)との間にパッキン(11)が圧縮状態
で配置され、接続管(10)内の流体が外部に漏洩すること
及び外部から物質が接続管(10)内に侵入することを阻止
するシールが形成される。また、抜け止め環(13)のエッ
ジ(17)が接続管(10)の外面に当接し上面(14)が継手本体
(2)のテーパ面(6)に当接するため、接続管(10)が軸方向
外側に引張されると、テーパ面(6)によって軸方向外側
に移動する抜け止め環(13)が縮径し、エッジ(17)が接続
管(10)の外面に適度に食い込み、接続管(10)の抜け出し
を阻止することができる。As the connection pipe (10) connected to the joint body (2), an outer resin-coated steel pipe buried in soil is often used. In order to prevent corrosion, the connection pipe (10) is formed with a resin coating layer (20) on the outer surface. When connecting the connecting pipe (10) with the plug-in fitting (1), the resin coating layer (2) formed at the end of the connecting pipe (10) is connected.
After partially removing (0), the end of the connecting pipe (10) is opened.
When inserted into (3), the retaining ring (13) is pushed outward by the cylindrical projection (12) of the packing (11), and the upper surface (14) of the retaining ring (13) is always tapered (6). Touch Therefore, the center axis of the retaining ring (13) and the center axis of the tapered surface (6) coincide with each other, so that the connecting pipe (10) can be easily inserted into the joint body (2). Also, when inserting the connecting pipe (10) beyond the retaining ring (13), the end of the connecting pipe (10) is inserted into the inner surface (16) of the retaining ring (13).
And at the same time expand the diameter of the retaining ring (13), compress the packing (11) via the retaining ring (13), and
Contact (18). Similarly, another connecting pipe (10) is inserted from the opposite end of the joint body (2). In this state, the packing (11) is arranged in a compressed state between the joint body (2) and the connection pipe (10), and the fluid in the connection pipe (10) leaks to the outside and a substance is connected from the outside. A seal is formed to prevent entry into the tube (10). Also, the edge (17) of the retaining ring (13) comes into contact with the outer surface of the connection pipe (10), and the upper surface (14)
When the connecting pipe (10) is pulled outward in the axial direction to abut the tapered surface (6) of (2), the retaining ring (13) that moves outward in the axial direction by the tapered surface (6) is reduced in diameter. However, the edge (17) bites into the outer surface of the connection pipe (10) appropriately, so that the connection pipe (10) can be prevented from coming off.
【０００７】[0007]
【発明が解決しようとする課題】差し込み式管継手(1)
では、接続管(10)の端部に形成された樹脂被覆層(20)を
部分的に除去するので、鋼管である接続管(10)が直接露
出して防食性能が低下する。このため、樹脂被覆層(20)
を除去した部分に塗料等を塗布して、防食性能を確保し
ているが、塗料を塗布する作業を要する上、接続管(10)
に付着する塗料が剥離するため、管継手の施工性及び防
食性の悪化を避けることができなかった。SUMMARY OF THE INVENTION Plug-in type pipe joint (1)
Then, since the resin coating layer (20) formed at the end of the connecting pipe (10) is partially removed, the connecting pipe (10), which is a steel pipe, is directly exposed and the anticorrosion performance is reduced. For this reason, the resin coating layer (20)
The anticorrosion performance is ensured by applying paint etc. to the part where the is removed, but the work of applying paint is required, and the connection pipe (10)
Since the paint adhering to the pipe was peeled off, deterioration in the workability and corrosion resistance of the pipe joint could not be avoided.
【０００８】また、樹脂被覆層(20)を除去せずに、接続
管(10)を接続できる構造を差し込み式管継手(1)に付与
する設計も可能であるが、接続管(10)の抜け出し阻止力
を一定レベル以上確保するには、抜け止め環(13)のエッ
ジ(17)が樹脂被覆層(20)を貫通して接続管(10)の表面に
まで達する必要がある。この場合、接続管(10)の抜け出
しの際に抜け止め環(13)のエッジ(17)が樹脂被覆層(20)
を貫通し接続管(10)の表面まで達するので、樹脂被覆層
(20)が破壊され、接続管(10)の表面が露出して、防食機
能は失われる。[0008] It is also possible to design the plug-in type pipe joint (1) to have a structure capable of connecting the connection pipe (10) without removing the resin coating layer (20). In order to ensure a certain level of blocking force, the edge (17) of the retaining ring (13) needs to penetrate the resin coating layer (20) and reach the surface of the connection pipe (10). In this case, when the connecting pipe (10) comes off, the edge (17) of the retaining ring (13) is formed by the resin coating layer (20).
Through the connection pipe (10) to reach the surface of the connecting pipe (10).
(20) is destroyed, the surface of the connecting pipe (10) is exposed, and the anticorrosion function is lost.
【０００９】そこで、図３に示すように、パッキン(11)
を抜け止め環(13)の軸方向外側に配置し、埋設環境に対
する防食機能を維持する構造が考えられる。図３では、
図２に示す箇所と同一の部分には同一の符号を付して説
明を省略する。図３に示す構造では、継手本体(2)の端
部(4)には、軸方向外側に形成された環状空洞部(8)内に
パッキン(11)が配置され、環状空洞部(8)の軸方向内側
にテーパ面(6)を有する傾斜空洞部(5)が形成される。テ
ーパ面(6)は開口部(3)に向かって順次縮径された形状を
有するが、軸方向内側に均一内径の環状内面(6a)が形成
される。傾斜空洞部(5)の軸方向外側には抜け止め環(1
3)が配置され、抜け止め環(13)の内側に弾性を有するゴ
ム製のバックアップリング(25)が配置される。抜け止め
環(13)の中心軸を傾斜空洞部(5)の中心軸と一致する姿
勢に抜け止め環(13)を保持するため、バックアップリン
グ(25)に形成された複数の円柱状の突起(26)を抜け止め
環(13)に当接させる。Therefore, as shown in FIG.
A structure is conceivable in which is disposed outside the retaining ring (13) in the axial direction to maintain the anticorrosion function against the buried environment. In FIG.
The same parts as those shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. In the structure shown in FIG. 3, a packing (11) is arranged in an annular cavity (8) formed on the outside in the axial direction at an end (4) of the joint body (2), and the annular cavity (8) An inclined cavity portion (5) having a tapered surface (6) is formed on the inner side in the axial direction. The tapered surface (6) has a shape gradually reduced in diameter toward the opening (3), but an annular inner surface (6a) having a uniform inner diameter is formed on the inner side in the axial direction. The retaining ring (1) is located outside the inclined cavity (5) in the axial direction.
3) is arranged, and a rubber backup ring (25) having elasticity is arranged inside the retaining ring (13). A plurality of columnar projections formed on the backup ring (25) to hold the retaining ring (13) so that the central axis of the retaining ring (13) coincides with the central axis of the inclined cavity (5). (26) is brought into contact with the retaining ring (13).
【００１０】図３に示す構造では、差し込み式管継手
(1)によって接続管(10)を接続する際に、接続管(10)を
開口部(3)内に挿入すると、接続管(10)はまずシールパ
ッキン(11)を圧縮し、更に挿入すると、接続管(10)の先
端部が抜け止め環(13)の内面(16)に当接して、抜け止め
環(13)を拡径し、エッジ(17)が樹脂被覆層(20)に接触す
る。抜け止め環(13)が更に内側に移動するに伴い、バッ
クアップリング(25)の突起(26)が軸方向に圧縮される。
更に接続管(10)を挿入すると、接続管(10)の先端部が内
側フランジ(18)に当接して、接続が完了する。[0010] In the structure shown in FIG.
When connecting the connecting pipe (10) by (1), when the connecting pipe (10) is inserted into the opening (3), the connecting pipe (10) first compresses the seal packing (11), and , The tip of the connecting pipe (10) comes into contact with the inner surface (16) of the retaining ring (13), the diameter of the retaining ring (13) is expanded, and the edge (17) contacts the resin coating layer (20). I do. As the retaining ring (13) moves further inward, the projection (26) of the backup ring (25) is compressed in the axial direction.
When the connection pipe (10) is further inserted, the tip of the connection pipe (10) comes into contact with the inner flange (18), and the connection is completed.
【００１１】接続管(10)に軸方向の抜け出し力が働く
と、接続管(10)の外側への移動に伴い、テーパ面(6)に
よって軸方向外側に移動する抜け止め環(13)が縮径し、
エッジ(17)が接続管(10)の外面に適度に食い込み、接続
管(10)の抜け出しを阻止することができる。When an axial pull-out force acts on the connecting pipe (10), the retaining ring (13), which moves outward in the axial direction by the tapered surface (6), moves outward with the connecting pipe (10). Reduced diameter,
The edge (17) bites into the outer surface of the connection pipe (10) appropriately, and the connection pipe (10) can be prevented from coming off.
【００１２】図２に示す構造では、パッキン(11)に突起
(12)を一体に形成するが、図２の構造では、バックアッ
プリング(25)を別途製造する必要があるため、製造コス
トが高くなる欠点がある。更に、バックアップリング(2
5)を使用する弊害も発生する。例えば、バックアップリ
ング(25)が軸方向に圧縮されたとき、突起(26)が径方向
内側に倒れると、接続管(10)の先端部と干渉し、接続管
(10)の挿入が困難になる。また、接続管(10)の挿入時
に、弾性を有するゴム製のバックアップリング(25)を圧
縮するため、接続管(10)の挿入力が増大して施工性が低
下する。更に、バックアップリング(25)の製造の際に、
金型内で原料ゴムを高温で成形加工するため、製造コス
トが更に高くなる。逆に、バックアップリング(25)を使
用しないと、図４に示すように、抜け止め環(13)が傾斜
空洞部(5)内で傾斜したり、径方向平面に対して変位す
るため、接続管(10)を円滑に挿入できない難点があっ
た。In the structure shown in FIG. 2, a protrusion is formed on the packing (11).
Although (12) is formed integrally, the structure of FIG. 2 has a disadvantage that the manufacturing cost is increased because the backup ring (25) must be separately manufactured. In addition, the backup ring (2
The adverse effect of using 5) also occurs. For example, when the backup ring (25) is compressed in the axial direction and the projection (26) falls inward in the radial direction, it interferes with the distal end of the connection pipe (10) and
It becomes difficult to insert (10). Further, when the connection pipe (10) is inserted, the rubber backup ring (25) having elasticity is compressed, so that the insertion force of the connection pipe (10) is increased and the workability is reduced. Furthermore, when manufacturing the backup ring (25),
Since the raw rubber is molded at a high temperature in the mold, the production cost is further increased. On the other hand, if the backup ring (25) is not used, as shown in FIG. 4, the retaining ring (13) is inclined in the inclined cavity (5) or displaced with respect to the radial plane, so that the connection is made. There was a problem that the tube (10) could not be inserted smoothly.
【００１３】本発明の目的は、埋設環境に対する防食機
能を維持し、製造コストが低廉で且つ施工が容易な差し
込み式管継手を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a plug-in type pipe joint which maintains an anticorrosion function against a buried environment, has a low manufacturing cost, and is easy to construct.
【００１４】[0014]
【課題を解決するための手段】本発明による差し込み式
管継手(30)は、接続管(10)を挿入する開口部(3)を有す
る継手本体(2)と、接続管(10)と継手本体(2)との間に配
置されるパッキン(11)、抜け止め環(13)及びバックアッ
プリング(31)とを備えている。継手本体(2)は、開口部
(3)に向かって順次縮径するテーパ面(6)によって形成さ
れる傾斜空洞部(5)と、傾斜空洞部(5)の軸方向内側に形
成され且つ継手本体(2)の中央部(2a)に連絡する径方向
面(9)と、傾斜空洞部(5)より軸方向外側に形成された環
状空洞部(8)とを備えている。抜け止め環(13)は傾斜空
洞部(5)内に配置され、バックアップリング(31)は抜け
止め環(13)と径方向面(9)との間に配置されると共に、
パッキン(11)は環状空洞部(8)内に配置される。バック
アップリング(31)は発泡樹脂により円環状に形成される
ので、弾性変形率の大きいバックアップリング(31)によ
り、抜け止め環(13)の中心軸を常に継手本体(2)の中心
軸に一致させて、接続管(10)を円滑に挿入できる。A plug-in type pipe joint (30) according to the present invention comprises a joint body (2) having an opening (3) into which a connecting pipe (10) is inserted, a connecting pipe (10) and a joint. A packing (11), a retaining ring (13) and a backup ring (31) are provided between the main body (2). The fitting body (2) has an opening
(3) An inclined cavity (5) formed by a tapered surface (6) that gradually decreases in diameter toward (3), and a central part (2) formed axially inside the inclined cavity (5) and formed in the joint body (2). It has a radial surface (9) communicating with 2a) and an annular cavity (8) formed axially outside the inclined cavity (5). The retaining ring (13) is disposed in the inclined cavity (5), and the backup ring (31) is disposed between the retaining ring (13) and the radial surface (9),
The packing (11) is arranged in the annular cavity (8). Since the backup ring (31) is formed in an annular shape by the foamed resin, the central axis of the retaining ring (13) always coincides with the central axis of the joint body (2) by the backup ring (31) having a large elastic deformation rate. Thus, the connection pipe (10) can be inserted smoothly.
【００１５】本発明の実施の形態では、バックアップリ
ング(31)は、外力を加えたとき、非圧縮状態の長さから
継手本体(2)の軸方向に１／３以下の厚さに圧縮される
弾性変形率を有し、外力を除去したときに非圧縮状態の
厚さに向かって復帰する弾性を有する。バックアップリ
ング(31)は、１５〜４０kg/m3の見かけ密度及び５０〜
２００N（ニュートン）の硬さを有する。バックアップ
リング(31)の弾性変形率は、好ましくは１／５以下、特
に好ましくは１／１０以下である。本発明では、バック
アップリング(31)は弾性を有することが重要であるが、
圧縮された状態から外力を除去したときに必ずしも１０
０%圧縮前の形状に完全に復帰する必要はなく、バック
アップリング(31)の材質によっては多少の永久変形が残
存してもよい。抜け止め環(13)は、継手本体(2)のテー
パ面(6)に当接する上面(14)と、バックアップリング(3
1)に当接する側面(15)と、傾斜状態で径方向内側に向く
内面(16)とを有する三角断面に形成され、上面(14)はテ
ーパ面(6)にほぼ一致する角度で形成され、側面(15)と
内面(16)との挟角によって鋭いエッジ(17)が形成され、
周方向の一個所に切り欠きが設けられ拡径及び縮径が可
能である。バックアップリング(31)の断面は、矩形又は
円弧状である。バックアップリング(31)は、例えばポリ
ウレタン樹脂又はゴムの発泡体から選択された樹脂によ
り形成され、断面積１平方センチメートル当たり０.１k
gfの圧縮応力で軸方向の厚さを８０%圧縮できる。継手
本体(2)内に挿入される接続管(10)が当接する内側フラ
ンジ(18)が継手本体(2)の中央部(2a)に形成される。In the embodiment of the present invention, when an external force is applied, the backup ring (31) is compressed to a thickness of 1/3 or less in the axial direction of the joint body (2) from the length of the uncompressed state. And has an elasticity that returns to a thickness in an uncompressed state when an external force is removed. The backup ring (31) has an apparent density of 15 to 40 kg / m 3 and 50 to 50 kg / m 3.
It has a hardness of 200N (Newton). The elastic deformation rate of the backup ring (31) is preferably 1/5 or less, particularly preferably 1/10 or less. In the present invention, it is important that the backup ring (31) has elasticity,
When the external force is removed from the compressed state,
It is not necessary to completely return to the shape before the 0% compression, and some permanent deformation may remain depending on the material of the backup ring (31). The retaining ring (13) has an upper surface (14) that contacts the tapered surface (6) of the joint body (2) and a backup ring (3).
1) is formed in a triangular cross section having a side surface (15) that abuts and an inner surface (16) that faces inward in the radial direction in an inclined state, and the upper surface (14) is formed at an angle substantially matching the tapered surface (6). A sharp edge (17) is formed by the included angle between the side surface (15) and the inner surface (16),
A notch is provided at one location in the circumferential direction, so that the diameter can be increased and reduced. The cross section of the backup ring (31) is rectangular or arcuate. The backup ring (31) is formed of a resin selected from, for example, polyurethane resin or rubber foam, and has a cross-sectional area of 0.1 k / cm 2.
The thickness in the axial direction can be reduced by 80% with a compressive stress of gf. An inner flange (18) with which the connecting pipe (10) inserted into the joint body (2) abuts is formed at a central portion (2a) of the joint body (2).
【００１６】[0016]
【発明の実施の形態】以下、本発明による差し込み式管
継手の実施の形態を図１について説明する。図１では、
図２〜図４に示す箇所と同一の部分には同一の符号を付
し、説明を省略する。FIG. 1 shows an embodiment of a plug-in type pipe joint according to the present invention. In FIG.
The same parts as those shown in FIGS. 2 to 4 are denoted by the same reference numerals, and description thereof will be omitted.
【００１７】本発明による差し込み式管継手(30)は、継
手本体(2)の傾斜空洞部(5)内に配置した抜け止め環(13)
の側面(15)と径方向面(9)との間に新規なバックアップ
リング(31)を配置した点に特徴がある。抜け止め環(13)
は傾斜空洞部(5)内に配置され、バックアップリング(3
1)は抜け止め環(13)と径方向面(9)との間に配置される
と共に、パッキン(11)は環状空洞部(8)内に配置され
る。バックアップリング(31)は円環状に形成され、軟質
ポリウレタンフォーム等発泡樹脂製の多孔質の合成樹脂
からなり矩形断面を有する。バックアップリング(31)
は、外力を加えたとき、非圧縮状態の長さから軸方向に
容易に１／３以下、例えば１／５以下、好ましくは１／
１０程度の軸方向の厚さに圧縮できる弾性変形率を有
し、外力を除去したときに非圧縮状態の長さに向かって
復帰する弾性を有する。バックアップリング(31)の見か
け密度は１５〜４０kg/m3で、硬さは５０〜２００Nが適
当である。The plug-in type pipe joint (30) according to the present invention comprises a retaining ring (13) arranged in the inclined cavity (5) of the joint body (2).
It is characterized in that a new backup ring (31) is arranged between the side surface (15) and the radial surface (9). Retaining ring (13)
Is located in the inclined cavity (5) and the backup ring (3
1) is disposed between the retaining ring (13) and the radial surface (9), and the packing (11) is disposed in the annular cavity (8). The backup ring (31) is formed in an annular shape, is made of a porous synthetic resin made of a foamed resin such as a soft polyurethane foam, and has a rectangular cross section. Backup ring (31)
Is easily reduced to 1/3 or less, for example, 1/5 or less, preferably 1 /
It has an elastic deformation rate that can be compressed to a thickness of about 10 in the axial direction, and has an elasticity that returns toward the uncompressed state when an external force is removed. The apparent density of the backup ring (31) is 15 to 40 kg / m 3 and the hardness is suitably 50 to 200N.
【００１８】バックアップリング(31)の弾力により傾斜
空洞部(5)内に配置された抜け止め環(13)の上面(14)は
継手本体(2)のテーパ面(6)に常時当接するため、抜け止
め環(13)は傾斜空洞部(5)内で傾斜したり、径方向平面
に対して変位せず、抜け止め環(13)の中心軸はテーパ面
(6)の中心軸に常に一致する。The upper surface (14) of the retaining ring (13) arranged in the inclined cavity (5) is always in contact with the tapered surface (6) of the joint body (2) due to the elasticity of the backup ring (31). The retaining ring (13) does not tilt in the inclined cavity (5) or displaces with respect to the radial plane, and the central axis of the retaining ring (13) is tapered.
It always coincides with the central axis of (6).
【００１９】樹脂被覆層(20)を有する接続管(10)を開口
部(3)から継手本体(2)内に挿入すると、接続管(10)の先
端部はまずシールパッキン(11)を圧縮する。更に挿入す
ると先端部は抜け止め環(13)の内面(16)と当接し、抜け
止め環(13)を拡径するため、エッジ(17)は樹脂被覆層(2
0)に当接する。同時に、収縮率の大きいバックアップリ
ング(31)は抜け止め環(13)の側面(15)により軸方向に圧
縮される。更に接続管(10)を挿入すると、先端部は内側
フランジ(18)に突き当たり、接続が完了する。When the connecting pipe (10) having the resin coating layer (20) is inserted into the joint body (2) through the opening (3), the tip of the connecting pipe (10) first compresses the seal packing (11). I do. When the tip is further inserted, the tip comes into contact with the inner surface (16) of the retaining ring (13), and the diameter of the retaining ring (13) is increased.
Contact 0). At the same time, the backup ring (31) having a large shrinkage is compressed in the axial direction by the side surface (15) of the retaining ring (13). When the connection pipe (10) is further inserted, the distal end abuts on the inner flange (18), and the connection is completed.
【００２０】抜け止め環(13)の中心軸は、常に継手本体
(2)のテーパ面(6)の中心軸と一致し、接続管(10)の中心
軸は、抜け止め環(13)の中心軸と一致するので、接続管
(10)を容易に挿入することができる。The center axis of the retaining ring (13) is always
The center axis of the tapered surface (6) of (2) coincides with the central axis of the connecting pipe (10), and the central axis of the retaining ring (13) matches the central axis of the retaining ring (13).
(10) can be easily inserted.
【００２１】本実施の形態では、下記の作用効果が得ら
れる。 [１] 弾性変形率の大きいバックアップリング(31)によ
り、抜け止め環(13)の中心軸を常に継手本体(2)の中心
軸に一致させて、接続管(10)を円滑に挿入できる。 [２] バックアップリング(31)の断面積１平方センチメ
ートル当たり０.１kgf程度の極めて低い圧縮応力でバッ
クアップリング(31)の軸方向長さを８０%圧縮できる。 [３] バックアップリング(31)は、突起を有するゴム製
のバックアップリングと異なり、圧縮時に内周側に張り
出さないので、接続管(10)の挿入の妨げとならない。 [４] 発泡樹脂により形成されるバックアップリング(3
1)により、接続管(10)を挿入する際の抵抗力は施工の障
害にならない程度に小さく、管挿入力を低減でき接続管
(10)を常に安定して挿入することができる。 [５] バックアップリング(31)を使用することにより、
大量生産が容易で製造コストを低減することができる。 [６] 断面矩形のバックアップリング(31)は板状の発泡
樹脂を簡単な金型で打ち抜くことによって容易且つ安価
に製造できる。 [７] 接続管(10)の耐食性能を損なわずに、軽量且つ安
価で施工性の良い差し込み式管継手が得られる。In this embodiment, the following operation and effect can be obtained. [1] The backup ring (31) having a large elastic deformation rate allows the center axis of the retaining ring (13) to always coincide with the center axis of the joint body (2), so that the connection pipe (10) can be inserted smoothly. [2] The axial length of the backup ring (31) can be reduced by 80% with an extremely low compressive stress of about 0.1 kgf per square centimeter of sectional area of the backup ring (31). [3] Unlike the backup ring made of rubber and having a projection, the backup ring (31) does not protrude inward when compressed, and thus does not hinder the insertion of the connection pipe (10). [4] A backup ring (3
According to 1), the resistance when inserting the connecting pipe (10) is small enough not to hinder the construction, and the pipe inserting force can be reduced.
(10) can always be inserted stably. [5] By using the backup ring (31),
Mass production is easy and manufacturing costs can be reduced. [6] The backup ring (31) having a rectangular cross section can be easily and inexpensively manufactured by punching a plate-like foamed resin with a simple mold. [7] A plug-in type pipe joint which is lightweight, inexpensive, and has good workability can be obtained without impairing the corrosion resistance of the connecting pipe (10).
【００２２】本発明の前記実施の形態は変更が可能であ
る。例えば、バックアップリング(31)の断面形状は、矩
形断面に限定されず、抜け止め環(13)の側面(15)に当接
して、圧縮される形状であれば円形、楕円形、段付き、
突起付き等の他の形状でもよい。図１では差し込み式管
継手(30)の一方の端部のみを示すが、差し込み式管継手
(30)の他方の端部は本発明と同一の構成を備えてもよ
く、またナット及びロックリング等を有する従来の構造
を含む他の構成を備えても良い。軸方向内側に形成され
る均一内径の環状内面(6a)を除去して、テーパ面(6)を
直接径方向面(9)に接続させてもよい。ポリウレタン樹
脂の発泡体の他に、発泡ゴムも使用することができる。The above embodiment of the present invention can be modified. For example, the cross-sectional shape of the backup ring (31) is not limited to a rectangular cross-section, but may be circular, elliptical, stepped, if it is in contact with the side surface (15) of the retaining ring (13) and is compressed.
Other shapes such as with protrusions are also possible. Although only one end of the plug-in fitting (30) is shown in FIG.
The other end of (30) may have the same configuration as the present invention, or may have another configuration including a conventional structure having a nut, a lock ring, and the like. The tapered surface (6) may be directly connected to the radial surface (9) by removing the annular inner surface (6a) having a uniform inner diameter formed on the inner side in the axial direction. In addition to the polyurethane resin foam, foamed rubber can also be used.
【００２３】[0023]
【発明の効果】前記のように、本発明による差し込み式
管継手では、防食性能を低減せずに接続管を容易に挿入
できるので、施工性を改善できる。As described above, in the plug-in type pipe joint according to the present invention, since the connecting pipe can be easily inserted without reducing the anticorrosion performance, the workability can be improved.
【図１】 本発明による差し込み式管継手の実施の形態
を示す断面図FIG. 1 is a sectional view showing an embodiment of a plug-in type pipe joint according to the present invention.
【図２】 従来の差し込み式管継手の断面図FIG. 2 is a cross-sectional view of a conventional plug-in pipe joint.
【図３】 従来の他の差し込み式管継手の断面図FIG. 3 is a cross-sectional view of another conventional plug-in type pipe joint.
【図４】 抜け止め環が傾斜する状態を示す図３に示す
管継手の断面図FIG. 4 is a sectional view of the pipe joint shown in FIG. 3, showing a state in which the retaining ring is inclined.
(2)・・継手本体、 (2a)・・中央部、 (3)・・開口
部、 (5)・・傾斜空洞部、 (6)・・テーパ面、 (8)
・・環状空洞部、 (9)・・経方向面、 (10)・・接続
管、 (11)・・パッキン、 (12)・・突起、 (13)・・
抜け止め環、 (14)・・上面、 (15)・・側面、 (16)
・・内面、 (17)・・エッジ、 (18)・・内側フラン
ジ、 (31)・・バックアップリング、(2) ・ ・ Joint body, (2a) ・ ・ Central part, (3) ・ ・ Opening, (5) ・ ・ Slope cavity, (6) ・ ・ Tapered surface, (8)
・ ・ Circular cavity, (9) ・ ・ Axial surface, (10) ・ ・ Connection pipe, (11) ・ ・ Packing, (12) ・ ・ Protrusion, (13) ・ ・
Retaining ring, (14) ... Top, (15) ... Side, (16)
・ ・ Inner surface, (17) ・ ・ Edge, (18) ・ ・ Inner flange, (31) ・ ・ Backup ring,
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年６月２１日（１９９９．６．２
１）[Submission date] June 21, 1999 (1999.6.2
1)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Correction target item name] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００２】[0002]
【従来の技術】水道管及び電線管等の接続の際に、接続
する一方の接続管の先端部を管継手の開口部内に挿入す
るだけで接続できる施工性の良い差し込み式管継手が開
発されている。差し込み式管継手では、内部流体の漏出
又は外部からの浸水に対し液密又は気密に接続管の先端
部と管継手との間を保持するパッキンと、管継手からの
接続管の抜け止めをする円環状の抜け止め環とが開口部
内に装着される。2. Description of the Related Art A plug-in type pipe joint having good workability has been developed which can be connected by simply inserting the tip of one of the connecting pipes into the opening of the pipe joint when connecting a water pipe or a conduit pipe. ing. In the plug-in type pipe joint, packing for holding the gap between the distal end portion of the connection pipe and the pipe joint in a liquid-tight or air-tight manner against leakage of internal fluid or inundation from the outside, and preventing the connection pipe from coming off from the pipe joint. An annular retaining ring is mounted in the opening.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１０】図３に示す構造では、差し込み式管継手
(1)によって接続管(10)を接続する際に、接続管(10)を
開口部(3)内に挿入すると、接続管(10)はまずパッキン
(11)を圧縮し、更に挿入すると、接続管(10)の先端部が
抜け止め環(13)の内面(16)に当接して、抜け止め環(13)
を拡径し、エッジ(17)が樹脂被覆層(20)に接触する。抜
け止め環(13)が更に内側に移動するに伴い、バックアッ
プリング(25)の突起(26)が軸方向に圧縮される。更に接
続管(10)を挿入すると、接続管(10)の先端部が内側フラ
ンジ(18)に当接して、接続が完了する。[0010] In the structure shown in FIG.
When connecting the connecting pipe (10) by (1), when the connecting pipe (10) is inserted into the opening (3), the connecting pipe (10)
When (11) is compressed and further inserted, the distal end of the connecting pipe (10) comes into contact with the inner surface (16) of the retaining ring (13), and the retaining ring (13)
And the edge (17) comes into contact with the resin coating layer (20). As the retaining ring (13) moves further inward, the projection (26) of the backup ring (25) is compressed in the axial direction. When the connection pipe (10) is further inserted, the tip of the connection pipe (10) comes into contact with the inner flange (18), and the connection is completed.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１２】図２に示す構造では、パッキン(11)に突起
(12)を一体に形成するが、図３の構造では、バックアッ
プリング(25)を別途製造する必要があるため、製造コス
トが高くなる欠点がある。更に、バックアップリング(2
5)を使用する弊害も発生する。例えば、バックアップリ
ング(25)が軸方向に圧縮されたとき、突起(26)が径方向
内側に倒れると、接続管(10)の先端部と干渉し、接続管
(10)の挿入が困難になる。また、接続管(10)の挿入時
に、弾性を有するゴム製のバックアップリング(25)を圧
縮するため、接続管(10)の挿入力が増大して施工性が低
下する。更に、バックアップリング(25)の製造の際に、
金型内で原料ゴムを高温で成形加工するため、製造コス
トが更に高くなる。逆に、バックアップリング(25)を使
用しないと、図４に示すように、抜け止め環(13)が傾斜
空洞部(5)内で傾斜したり、径方向平面に対して変位す
るため、接続管(10)を円滑に挿入できない難点があっ
た。In the structure shown in FIG. 2, a protrusion is formed on the packing (11).
Although (12) is integrally formed, the structure of FIG. 3 has a disadvantage that the manufacturing cost is increased because the backup ring (25) must be separately manufactured. In addition, the backup ring (2
The adverse effect of using 5) also occurs. For example, when the backup ring (25) is compressed in the axial direction and the projection (26) falls inward in the radial direction, it interferes with the distal end of the connection pipe (10) and
It becomes difficult to insert (10). Further, when the connection pipe (10) is inserted, the rubber backup ring (25) having elasticity is compressed, so that the insertion force of the connection pipe (10) is increased and the workability is reduced. Furthermore, when manufacturing the backup ring (25),
Since the raw rubber is molded at a high temperature in the mold, the production cost is further increased. Conversely, if the backup ring (25) is not used, as shown in FIG. 4, the retaining ring (13) is inclined in the inclined cavity (5) or displaced with respect to the radial plane, so There was a problem that the tube (10) could not be inserted smoothly.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１９[Correction target item name] 0019
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１９】樹脂被覆層(20)を有する接続管(10)を開口
部(3)から継手本体(2)内に挿入すると、接続管(10)の先
端部はまずパッキン(11)を圧縮する。更に挿入すると先
端部は抜け止め環(13)の内面(16)と当接し、抜け止め環
(13)を拡径するため、エッジ(17)は樹脂被覆層(20)に当
接する。同時に、収縮率の大きいバックアップリング(3
1)は抜け止め環(13)の側面(15)により軸方向に圧縮され
る。更に接続管(10)を挿入すると、先端部は内側フラン
ジ(18)に突き当たり、接続が完了する。When the connecting pipe (10) having the resin coating layer (20) is inserted into the joint body (2) from the opening (3), the tip of the connecting pipe (10) first compresses the packing (11). . When it is further inserted, the tip comes into contact with the inner surface (16) of the retaining ring (13),
In order to enlarge the diameter of (13), the edge (17) comes into contact with the resin coating layer (20). At the same time, the backup ring (3
1) is compressed in the axial direction by the side surface (15) of the retaining ring (13). When the connection pipe (10) is further inserted, the distal end abuts on the inner flange (18), and the connection is completed.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須藤 満輝 埼玉県熊谷市末広四丁目14番１号 株式会 社リケン熊谷事業所内 (72)発明者 甲斐田 寛仁 埼玉県熊谷市末広四丁目14番１号 株式会 社リケン熊谷事業所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Sudo 4-1-1, Suehiro, Kumagaya-shi, Saitama Prefecture Rikken Kumagaya Office (72) Inventor Hirohito Kaida 4-1-1, Suehiro, Kumagaya-shi, Saitama Rikken Kumagaya Office
Claims (9)
体と、接続管と継手本体との間に配置されるパッキン、
抜け止め環及びバックアップリングとを備え、 継手本体は、開口部に向かって順次縮径するテーパ面に
よって形成される傾斜空洞部と、傾斜空洞部の軸方向内
側に形成され且つ継手本体の中央部に連絡する径方向面
と、傾斜空洞部より軸方向外側に形成された環状空洞部
とを備え、 抜け止め環は傾斜空洞部内に配置され、バックアップリ
ングは抜け止め環と径方向面との間に配置されると共
に、パッキンは環状空洞部内に配置された差し込み式管
継手において、 バックアップリングは発泡樹脂により円環状に形成され
たことを特徴とする差し込み式管継手。A joint body having an opening into which the connecting pipe is inserted; a packing disposed between the connecting pipe and the joint body;
The joint body is provided with a retaining ring and a backup ring, and the joint main body is formed with a tapered surface gradually decreasing in diameter toward the opening, and a central part of the joint main body formed inside the inclined cavity in the axial direction. And an annular cavity formed axially outside the inclined cavity. The retaining ring is disposed in the inclined cavity, and the backup ring is located between the retaining ring and the radial surface. And a packing is disposed in the annular cavity, and the backup ring is formed in an annular shape from foamed resin.
き、非圧縮状態の長さから継手本体の軸方向に１／３以
下の厚さに圧縮される弾性変形率及び外力を除去したと
きに非圧縮状態の厚さに向かって復帰する弾性を有する
請求項１に記載の差し込み式管継手。2. The backup ring, when an external force is applied, removes an elastic deformation rate and an external force that are compressed to a thickness of 1/3 or less in the axial direction of the joint body from the length of the uncompressed state and removes the external force. The plug-in type pipe joint according to claim 1, wherein the pipe joint has elasticity that returns toward a thickness in a compressed state.
3の見かけ密度及び５０〜２００N（ニュートン）の硬さ
を有する請求項１又は２に記載の差し込み式管継手。3. The backup ring has a weight of 15 to 40 kg / m.
The plug-in type pipe joint according to claim 1 or 2, having an apparent density of 3 and a hardness of 50 to 200 N (Newton).
５以下である請求項２に記載の差し込み式管継手。4. The elastic deformation rate of the backup ring is 1 /
The plug-in type pipe joint according to claim 2, wherein the number is 5 or less.
１０以下である請求項２に記載の差し込み式管継手。5. The elastic deformation rate of the backup ring is 1 /
The plug-in type pipe joint according to claim 2, wherein the number is 10 or less.
接する上面と、バックアップリングに当接する側面と、
傾斜状態で径方向内側に向く内面とを有する三角断面に
形成され、上面はテーパ面にほぼ一致する角度で形成さ
れ、側面と内面との挟角によって鋭いエッジが形成さ
れ、周方向の一個所に切り欠きが設けられ拡径及び縮径
が可能である請求項１〜５のいずれか１項に記載の差し
込み式管継手。6. The retaining ring has an upper surface abutting on a tapered surface of the joint body, a side surface abutting on a backup ring,
An inclined surface is formed in a triangular cross section having an inner surface facing inward in the radial direction, the upper surface is formed at an angle substantially corresponding to the tapered surface, a sharp edge is formed by the included angle between the side surface and the inner surface, and one portion in the circumferential direction. The plug-in type pipe joint according to any one of claims 1 to 5, wherein a notch is provided in the pipe joint so that the diameter can be increased and reduced.
円弧状である請求項１〜６のいずれか１項に記載の差し
込み式管継手。7. The plug-in type pipe joint according to claim 1, wherein a cross section of the backup ring is rectangular or arc-shaped.
又はゴムの発泡体から選択された樹脂により形成され、
断面積１平方センチメートル当たり０.１kgfの圧縮応力
で軸方向の厚さを８０%圧縮できる請求項１〜７のいず
れか１項に記載の差し込み式管継手。8. The backup ring is formed of a resin selected from polyurethane resin or rubber foam,
The plug-in type pipe joint according to any one of claims 1 to 7, wherein the axial thickness can be reduced by 80% with a compressive stress of 0.1 kgf per square centimeter of sectional area.
る内側フランジが継手本体の中央部に形成された請求項
１〜８のいずれか１項に記載の差し込み式管継手。9. The plug-in type pipe joint according to claim 1, wherein an inner flange with which a connecting pipe inserted into the joint body abuts is formed at a central portion of the joint body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11130382A JP2000320754A (en) | 1999-05-11 | 1999-05-11 | Insertion type pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11130382A JP2000320754A (en) | 1999-05-11 | 1999-05-11 | Insertion type pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000320754A true JP2000320754A (en) | 2000-11-24 |
Family
ID=15033008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11130382A Pending JP2000320754A (en) | 1999-05-11 | 1999-05-11 | Insertion type pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000320754A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016036057A1 (en) * | 2014-09-04 | 2016-03-10 | 정우금속공업 주식회사 | Sealing member for pipe connection comprising protrusions |
-
1999
- 1999-05-11 JP JP11130382A patent/JP2000320754A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016036057A1 (en) * | 2014-09-04 | 2016-03-10 | 정우금속공업 주식회사 | Sealing member for pipe connection comprising protrusions |
| US10415726B2 (en) | 2014-09-04 | 2019-09-17 | Jungwoo Metal Ind. Co., Ltd. | Sealing member having projection part for pipe connection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3866925A (en) | Device for increasing the elastic force of and reinforcing objects manufactured from an elastic material | |
| US3020054A (en) | Sealing ring for a pipe joint and the joint incorporating this ring | |
| BR0112246B1 (en) | joining reinforcement for peripherally ribbed oblong bodies with a locking retaining projection | |
| US5380017A (en) | Sealing ring for sealing against fluid flow in either direction between inner and outer pipes | |
| EP1366318B1 (en) | Coupling for connection of a tube or hose by pushing-in | |
| CN111373177B (en) | Gasket ring | |
| ES238782U (en) | Sealing element adapted to be radially compressed | |
| JP2000320754A (en) | Insertion type pipe joint | |
| JP4781220B2 (en) | Pipe fitting and backup ring used for it | |
| JP2002195482A (en) | Pipe joint | |
| GB1594557A (en) | Sealing a pipe joint | |
| US3038631A (en) | Pipe stopper plug | |
| JPH0716151Y2 (en) | Pipe joint structure | |
| JPH08210567A (en) | Pipe joint | |
| JP2004092678A (en) | Pipe joint | |
| US837482A (en) | Pipe-joint. | |
| JPH0241435Y2 (en) | ||
| JPH09126374A (en) | Connection structure between thin diameter metal tube and flexible hose | |
| JPH09159080A (en) | Separation prevention pipe joint | |
| JP2000337566A (en) | Sealing structure of fluid pipe | |
| JPS6217670Y2 (en) | ||
| JP2000179763A (en) | Fitting, and connecting method therefor | |
| KR20030007017A (en) | Coupling packing and pipe connecting structure using the same | |
| JP2006220197A (en) | Ball valve | |
| JP2001041370A (en) | Bayonet pipe joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20051018 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20081028 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20081030 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20081114 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20090305 |