JP2005002587A - Joint for resin concrete pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint for a resin concrete pipe capable of making formed processing a corrosion resistant thin steel plate p in a short cylindrical-shape 1, putting a partition ring 3 on the central part by a non-metallic acid-proof material in a detachable manner and simply and quickly obtaining a cut-off joint for corrosion resistent Hume pipes 7 and 7. <P>SOLUTION: The joint of the resin concrete pipe is constituted by making bending formation of a plurality of inward circular projected stripes 2 and 2' in bilateral symmetrical positions of the center circumferential line c of the short cylinder 1 by the stainless steel thin steel plate p, forming a circular trench 4 fitting the outer circumferential edge of the partition ring 3 between nearby inward circular projected stripes 2 and 2 of the center circumferential line c, making bending formation of both end sections 5 and 5 of the short cylinder 1 in an inward arc-shaped edge 5' and making bending formation of intermediate inward circular projected stripes 2' and 2' between the nearby inward circular projected stripes 2 and 2 and both end sections 5 and 5, a first circular cut-off rubber 6 is placed between the intermediate inward circular projected stripe 2' and the inward arc-shaped edge 5', and the partition ring 3 is a flexible plate-like ring with water resistance and acid resistance, and the joint of the resin concrete can be put on the circular trench 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【００１２】
上記短円筒１の中心円周線ｃの左右対称位置に複数（４個）の内向環状突条（リブ）２，２’が屈曲形成される。
【００１３】
中心円周線ｃの両側直近の内向環状突条２，２間には仕切リング（Ｐａｒｔｉｔｉｏｎ Ｒｉｎｇ）３の外周縁を嵌合する環状溝４が形成される。
【００１４】
上記短円筒１の両端部５，５を内向弧形縁５’に屈曲形成し、上記直近内向環状突条２，２と上記両端部５，５との中間に内向環状突条２’，２’を屈曲形成してカラーを形成する。
【００１５】
上記中心円周線ｃに沿って配設される仕切リング３は耐水性及び耐蝕性である可撓性板状リングであって、硬化合成樹脂ボード又は硬化ファイバーボードＭ．Ｄ．Ｆ．（Ｍｅｄｉｕｍ Ｄｅｎｓｉｔｙ Ｆｉｂｅｒｂｏａｒｄ）によって形成される。
【００１６】
上記仕切リング３を手で弯曲して短円筒１内に挿入し、弯曲仕切リング３の上下端を上記環状溝４内に挿入し、弯曲左右両縁を平面状に手で戻して該左右両縁を上記環状溝４内に挿入することにより、上記リング３の外周縁の全周を該環状溝４内に嵌合することによって上記短円筒１の中心円周線ｃに沿って該円筒１の内周に仕切リング３を装着することができ、逆の動作によって該リング３を上記環状溝４から分離し、短円筒１外に取外すことも可能である。
【００１７】
その後上記中間内向環状突条２’と両端部５の内向弧形縁５’との間に環状止水ゴム６を嵌込み、接着剤で接着固定し、上記両端部５，５の両開口部からレジンコンクリート管７，７を対向方向に嵌装し、該管７，７の対向端７’，７’を上記仕切リング３の両面に接触させることによって２個のレジンコンクリート管７，７を上記カラー１の中心線ａに沿ってそれぞれ挿入し、挿入部を第１環状止水ゴム６によって止水することができる。
【００１８】
第１環状止水ゴム６の断面形状は図１（イ）（ロ）図及び図３（イ）図に示すように一端６’が内向弧形縁５’に係合するように低く形成され、一端６’から他端６”に向って高く傾斜する管端案内面６ａを形成し、頂上台面に３条の深溝６ｂを環状方向に形成し、底面６ｃを短円筒１の内面に接着剤で接着固定させる。
【００１９】
挿入するレジンコンクリート管７の外周面は図１（イ）（ロ）図に示すように上記案内面６ａから深溝６ｂ部を押圧して短円筒１内に進入するが、その外周面が端部５の内向弧形縁５’及び中間及び直近内向環状突条２，２’に干渉することなく上記第１の環状止水ゴム６によって支持され、かつ止水される。
【００２０】
又上記直近の内向環状突条２と中間の内向環状突条２’との間に第２環状止水リング８を上記円周線ｃを中心とする対称位置に配置し、これを上記円筒１の内面に接着剤で接着固定する。
【００２１】
第２環状止水ゴムリング８の断面形状は図１（イ）（ロ）図及び図３（ロ）図に示すように中間の内向環状突条８から中心円周線ｃ側に向って高く傾斜する案内面８’を有し、上記レジンコンクリート管７の挿入端を案内する形状よりなり、高さは第１環状止水リング６より高く環状空間８ａ，８ｂによりクッション性が附与される。
【００２２】
従って上記短円筒１の両端部５，５からレジンコンクリート管７，７を中心線ａに沿って仕切リング３に接するまで押圧挿入すると、第１の環状止水ゴム６，６が上記コンクリート管７，７の外周面に圧着して止水状態に両管７，７を接続することができる（図１（イ）図）。
【００２３】
又上記第２の環状止水ゴム８，８を装着することによって、対向レジンコンクリート管７，７の外周面と上記円筒１の内面との圧接面積が大となるため、より水密性を高める必要があるときに第１環状止水ゴム６，６と併用することができる（図１（ロ）図）。
【００２４】
上記短円筒（カラー）１は上述のように両端部５，５を内向弧形縁５’（カール部）となし、かつ上記直近及び中間内向環状突条（リブ）２，２’を屈曲形成したので薄鋼板（１〜１．５ｍｍ）であるにも拘わらず剛性又は強度大であり変形を防止することができる。
【００２５】
かつ上記薄鋼板を不銹鋼（ステンレス）とし、仕切リング３の材質を硬化合成樹脂又は硬化ファイバーボードとしたため酸性汚水、硫化水素水等による腐蝕のおそれがなく、耐久性に富むものである。又、仕切リング３の内周面と上記レジンコンクリート管７，７の内周面とを一致させることにより、両管７，７間に汚物進入溝や、流体抵抗凸起を無くすことができる。
【００２６】
尚図１（ロ）図、図３（ロ）図中８”は第２環状止水ゴム８の他端側に形成した階段状溝、図４中９は従来の止水ゴムリング、９’は該ゴムリング９の止め輪、９”はアンカー部である。
【００２７】
【発明の効果】
本発明は上述のようにステンレス薄鋼板によって短円筒（カラー）が形成され、該短円筒には中心円周線の左右両側対称位置に複数の内向環状突条（リブ）を屈曲形成し、両端部に内向弧形縁（カール縁）を屈曲形成してなるため、薄鋼板で軽量であるにも拘わらずカラー全体の剛性及び強度が充分であり、かつステンレス鋼板によるため排水、汚水等に対し耐蝕性であり腐蝕のおそれがなく、
又中心円周線の左右直近リブ間の環状嵌合溝に、可撓性板状リング（仕切リング）を弯曲させて上記カラーの一端開口部から短円筒内に挿入し、該リングの外周縁を上記嵌合溝に容易に嵌合し仕切リングを短円筒の中心部に簡便に装着することができ、かつ該リングを硬化合成樹脂や硬化ファイバーボードによって形成してなるため上記カラーと共に耐蝕性仕切リングとなし得るばかりでなく、該仕切りリングにより上記カラーに挿入したレジンコンクリート間の対向端の接触損傷を防止し得る。
【００２８】
又カラーの両端部に沿って設けた第１環状止水ゴムによって対向する２個のレジンコンクリート管を充分止水し、さらに第２環状止水ゴムと併用し得て水密性を高めることができる。
【図面の簡単な説明】
【図１】（イ）図は本発明のレジンコンクリート管の継手を示す一部縦断面図である。（ロ）図は第１及び第２環状止水ゴムリングを装着した継手の縦断面図である。
【図２】カラー及び仕切リングの斜視図である。
【図３】（イ）図は第１環状止水ゴムリングの縦断面図である。
（ロ）図は第２環状止水ゴムリングの縦断面図である。
【図４】従来の合成樹脂製継手の一部縦断面図である。
【符号の説明】
ｐ ステンレス薄鋼板
１ 短円筒（カラー）
ｃ 中心円周線
２，２’ 内向環状突条
３ 仕切リング
４ 環状溝
５ 端部
５’ 内向弧形縁
６，６’ 第１及び第２環状止水ゴム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint of a resin concrete pipe used for a sewer pipe.
[0002]
[Prior art]
Conventionally, the fume pipe used for the sewer is a cement concrete fume pipe, which has collapsed due to acidic sewage, hydrogen sulfide water (hot spring water), and the like, and the steel pipe joint corroded accordingly, and quickly became unusable.
[0003]
Accordingly, a corrosion-resistant resin concrete fume pipe has been manufactured and used (for example, Patent Document 1).
[0004]
However, since it is necessary to make the joint of the fume pipe also corrosion-resistant, a cylindrical joint made of synthetic resin or the like has been developed, but the outer periphery of the fume pipe and the anchor part of the joint are integrated with a male and female rigid joint. However, there was a problem in terms of tensile strength, and it took a huge amount of money to manufacture the mold, and it was difficult to make a detachable joint (for example, Patent Document 2).
[0005]
Moreover, as shown in FIG. 4, it is a detachable joint made of synthetic resin and has a structure that holds the water stop ring, and the partition ring is integrated with the cylindrical part (collar part), so the structure is extremely complicated, There was a problem that the structure of the mold itself was extremely complicated.
[0006]
[Patent Document 1]
Japanese Patent Publication No. 5-37086 (corrosion resistant tube)
[Patent Document 2]
Japanese Patent No. 3320646 (Claim 1 ... Tubular joint made of a flexible material such as synthetic resin, FIG. 2 and FIG. 3)
[0007]
[Problems to be solved by the invention]
It is an object of the present invention to form a corrosion-resistant thin steel sheet into a short cylindrical shape, attach a partition ring to a central portion in a detachable manner using a non-metallic acid-resistant material, and obtain a waterproof joint for a corrosion-resistant fume tube easily and quickly. And
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention firstly forms a plurality of inward annular ridges at the symmetrical positions of the central circumferential line of the short cylinder made of stainless steel sheet, so that the inward annular protrusions closest to the central circumferential line are formed. An annular groove that fits the outer peripheral edge of the partition ring is formed between the strips, both ends of the short cylinder are bent into inward arc-shaped edges, and an intermediate inward ring is formed between the nearest inwardly facing annular protrusion and both ends. A protrusion is formed by bending, a first annular water-stopping rubber is disposed between the intermediate inwardly extending annular protrusion and the inwardly arcuate edge, and the partition ring is flexible with water resistance and corrosion resistance. It is a plate-shaped ring, and a joint of a resin concrete pipe that can be mounted in the annular groove,
Secondly, the joint of the resin concrete pipe according to the first invention, wherein a second annular water blocking rubber is disposed between the nearest inward annular protrusion and the intermediate inward annular protrusion,
Third, the resin concrete pipe joint according to the first or second invention, wherein the flexible plate ring is a cured synthetic resin or a cured fiber board,
Consists of.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A strip of a corrosion-resistant (stainless) thin steel plate p is formed into the short cylinder 1 by a forming pinch roller.
[0010]
The dimensions and tolerances (nominal diameters 400 to 1000) of the short cylinder (color) 1 are as shown in Table 1.
[0011]
[Table 1]

[0012]
A plurality (four pieces) of inward annular ridges (ribs) 2 and 2 ′ are bent and formed at positions symmetrical to the center circumferential line c of the short cylinder 1.
[0013]
An annular groove 4 that fits the outer peripheral edge of a partition ring 3 is formed between the inward annular ridges 2 and 2 immediately adjacent to both sides of the center circumferential line c.
[0014]
Both ends 5 and 5 of the short cylinder 1 are bent to an inward arc-shaped edge 5 ′, and the inward annular ridges 2 ′ and 2 are arranged between the nearest inward annular ridges 2 and 2 and the both ends 5 and 5. 'Bend to form a collar.
[0015]
The partition ring 3 disposed along the center circumferential line c is a flexible plate-like ring having water resistance and corrosion resistance, and is a cured synthetic resin board or a cured fiber board. D. F. (Medium Density Fiberboard).
[0016]
The partition ring 3 is bent by hand and inserted into the short cylinder 1, and the upper and lower ends of the curve partition ring 3 are inserted into the annular groove 4. By inserting the edge into the annular groove 4 and fitting the entire circumference of the outer peripheral edge of the ring 3 into the annular groove 4, the cylinder 1 along the center circumferential line c of the short cylinder 1. The partition ring 3 can be attached to the inner periphery of the ring 3, and the ring 3 can be separated from the annular groove 4 by the reverse operation and removed from the short cylinder 1.
[0017]
Thereafter, an annular water blocking rubber 6 is fitted between the intermediate inward annular ridge 2 ′ and the inwardly arcuate edges 5 ′ of both end portions 5, and bonded and fixed with an adhesive. The resin concrete pipes 7 and 7 are fitted in opposite directions, and the opposite ends 7 'and 7' of the pipes 7 and 7 are brought into contact with both surfaces of the partition ring 3, so that the two resin concrete pipes 7 and 7 are attached. Each of the insertion portions can be inserted along the center line a of the collar 1, and the insertion portion can be stopped by the first annular waterproof rubber 6.
[0018]
The cross-sectional shape of the first annular water blocking rubber 6 is formed low so that one end 6 'engages with the inwardly arcuate edge 5' as shown in FIGS. 1 (a) (b) and 3 (a). , A pipe end guide surface 6a which is highly inclined from one end 6 ′ to the other end 6 ″ is formed, three deep grooves 6b are formed in an annular direction on the top base surface, and a bottom surface 6c is formed on the inner surface of the short cylinder 1 Adhere and fix with.
[0019]
The outer peripheral surface of the resin concrete pipe 7 to be inserted enters the short cylinder 1 by pressing the deep groove 6b portion from the guide surface 6a as shown in FIGS. 5 is supported and stopped by the first annular water-stopping rubber 6 without interfering with the inwardly arcuate edge 5 'and the intermediate and nearest inwardly extending annular ridges 2, 2'.
[0020]
Further, a second annular water stop ring 8 is arranged at a symmetrical position around the circumferential line c between the nearest inward annular ridge 2 and the intermediate inward annular ridge 2 '. Adhesive and fixed to the inner surface of the adhesive.
[0021]
The cross-sectional shape of the second annular water-stopping rubber ring 8 is high from the intermediate inward annular ridge 8 toward the center circumferential line c as shown in FIGS. 1 (a) (b) and 3 (b). It has an inclined guide surface 8 ′ and has a shape for guiding the insertion end of the resin concrete pipe 7. The height is higher than that of the first annular water blocking ring 6, and cushioning is provided by the annular spaces 8 a and 8 b. .
[0022]
Accordingly, when the resin concrete pipes 7 and 7 are pressed and inserted from both end portions 5 and 5 of the short cylinder 1 along the center line a until they come into contact with the partition ring 3, the first annular water blocking rubbers 6 and 6 are brought into contact with the concrete pipe 7. The pipes 7 and 7 can be connected in a water-stopped state by being crimped to the outer peripheral surface of FIG.
[0023]
Moreover, since the pressure contact area between the outer peripheral surface of the opposed resin concrete pipes 7 and 7 and the inner surface of the cylinder 1 is increased by mounting the second annular water blocking rubbers 8 and 8, it is necessary to further improve the water tightness. When there is, it can be used in combination with the first annular water-stopping rubbers 6 and 6 (FIG. 1 (B)).
[0024]
The short cylinder (collar) 1 has both end portions 5 and 5 as inwardly arcuate edges 5 '(curl portions) as described above, and the nearest and intermediate inwardly extending annular ridges (ribs) 2 and 2' are bent. Therefore, although it is a thin steel plate (1 to 1.5 mm), it has high rigidity or strength and can prevent deformation.
[0025]
And since the said thin steel plate is stainless steel (stainless steel) and the material of the partition ring 3 was hardened synthetic resin or hardened fiber board, there is no possibility of corrosion by acidic sewage, hydrogen sulfide water, etc., and it is rich in durability. In addition, by making the inner peripheral surface of the partition ring 3 coincide with the inner peripheral surface of the resin concrete pipes 7 and 7, it is possible to eliminate filth entry grooves and fluid resistance protrusions between the pipes 7 and 7.
[0026]
In FIG. 1 (b) and FIG. 3 (b), 8 "is a step-like groove formed on the other end side of the second annular water blocking rubber 8, 9 in FIG. 4 is a conventional water blocking rubber ring, 9 '. Is a retaining ring of the rubber ring 9, and 9 "is an anchor portion.
[0027]
【The invention's effect】
In the present invention, a short cylinder (collar) is formed of a stainless steel sheet as described above, and a plurality of inwardly extending annular ridges (ribs) are formed at the left and right symmetrical positions of the center circumferential line. Since the inward arc-shaped edge (curl edge) is bent at the part, the rigidity and strength of the entire collar is sufficient despite the fact that it is lightweight with a thin steel plate. It is corrosion resistant and has no risk of corrosion.
In addition, a flexible plate ring (partition ring) is bent in the annular fitting groove between the right and left nearest ribs of the center circumferential line and inserted into the short cylinder from the one end opening of the collar, and the outer peripheral edge of the ring Can be easily fitted into the fitting groove and the partition ring can be easily attached to the center of the short cylinder, and the ring is formed of a hardened synthetic resin or hardened fiberboard, so it is corrosion resistant together with the collar. In addition to being a partition ring, the partition ring can prevent contact damage at the opposite ends between the resin concrete inserted into the collar.
[0028]
Further, the two resin concrete pipes facing each other can be sufficiently stopped by the first annular water-stopping rubber provided along both ends of the collar, and can be used in combination with the second annular water-stopping rubber to enhance the watertightness. .
[Brief description of the drawings]
FIG. 1A is a partial longitudinal sectional view showing a joint of a resin concrete pipe according to the present invention. (B) The figure is a longitudinal sectional view of a joint equipped with first and second annular water blocking rubber rings.
FIG. 2 is a perspective view of a collar and a partition ring.
FIG. 3A is a longitudinal sectional view of a first annular water blocking rubber ring.
(B) The figure is a longitudinal sectional view of the second annular water blocking rubber ring.
FIG. 4 is a partial longitudinal sectional view of a conventional synthetic resin joint.
[Explanation of symbols]
p Stainless steel sheet 1 Short cylinder (color)
c Center circumferential line 2, 2 ′ Inward annular ridge 3 Partition ring 4 Annular groove 5 End 5 ′ Inward arc-shaped edges 6, 6 ′ First and second annular waterstop rubber

Claims (3)

A plurality of inwardly extending annular ridges are bent at symmetrical positions on the center circumferential line of a short cylinder made of stainless steel sheet,
An annular groove that fits the outer peripheral edge of the partition ring is formed between the inwardly extending annular protrusions of the center circumferential line,
Bending the both ends of the short cylinder to the inward arc-shaped edge,
An intermediate inward annular ridge is formed between the nearest inward annular ridge and both ends,
A first annular water blocking rubber is disposed between the intermediate inwardly extending annular ridge and the inwardly arcuate edge;
A resin concrete pipe joint in which the partition ring is a water-resistant and corrosion-resistant flexible plate-like ring and can be mounted in the annular groove. The resin concrete pipe joint according to claim 1, wherein a second annular water blocking rubber is disposed between the nearest inward annular protrusion and the intermediate inward annular protrusion. The joint of a resin concrete pipe according to claim 1 or 2, wherein the flexible plate ring is a cured synthetic resin or a cured fiber board.

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