JP4933340B2 - Anticorrosion sleeve - Google Patents

Anticorrosion sleeve Download PDF

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JP4933340B2
JP4933340B2 JP2007115958A JP2007115958A JP4933340B2 JP 4933340 B2 JP4933340 B2 JP 4933340B2 JP 2007115958 A JP2007115958 A JP 2007115958A JP 2007115958 A JP2007115958 A JP 2007115958A JP 4933340 B2 JP4933340 B2 JP 4933340B2
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sleeve
resin
diameter
flange portion
anticorrosion
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JP2008274983A (en
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拓司 中村
由男 橋岡
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Kitz Corp
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Description

本発明は、水道本管から支管へ分岐配管を行う際に、金属管に穿孔した開口穴に装着して、その開口部分を防食するための防食スリーブに関する。   The present invention relates to an anti-corrosion sleeve for attaching to an opening hole drilled in a metal pipe to prevent corrosion at the opening portion when branching from a water main to a branch pipe.

この種の防食スリーブは、金属スリーブと樹脂製スリーブとからなり、水道本管に穿孔した挿入穴に挿入し、金属スリーブを樹脂製スリーブに嵌挿して樹脂製スリーブを拡径させ、この樹脂製スリーブを開口穴の切削面に密着させ、または、樹脂スリーブに装着したゴムスリーブを開口穴の切削面に密着させる防食スリーブがそれぞれ知られている（特許文献１及び特許文献２参照）。   This type of anti-corrosion sleeve consists of a metal sleeve and a resin sleeve, and is inserted into an insertion hole drilled in the water main, and the metal sleeve is inserted into the resin sleeve to expand the diameter of the resin sleeve. There are known anticorrosion sleeves in which the sleeve is brought into close contact with the cutting surface of the opening hole, or the rubber sleeve attached to the resin sleeve is brought into close contact with the cutting surface of the opening hole (see Patent Documents 1 and 2).

特許文献１の防食スリーブは、弾性スリーブの内径側に樹脂スリーブを備えたスリーブ本体に対して、開口部から剛性スリーブを挿入するようにしたものであり、剛性スリーブが挿入方向から順に小径部と大径部を有し、小径部の挿入により穿孔穴の切削面部分に弾性スリーブを密着させ、大径部の挿入により分水栓通水口の内周面に樹脂スリーブの鍔部を密着させるようにしたものである。   The anticorrosion sleeve of Patent Document 1 is such that a rigid sleeve is inserted from an opening into a sleeve main body provided with a resin sleeve on the inner diameter side of an elastic sleeve. It has a large diameter part so that the elastic sleeve is brought into close contact with the cutting surface portion of the drilled hole by inserting the small diameter part, and the collar part of the resin sleeve is brought into close contact with the inner peripheral surface of the water faucet water inlet by inserting the large diameter part. It is a thing.

特許文献２は、金属スリーブの外周面に次第に拡径するくさび部を形成し、この金属スリーブを樹脂スリーブに密挿して拡径するようにしたものであり、この防食スリーブは、金属スリーブと樹脂スリーブの２層構造によって防食部を構成し、挿入時においては、樹脂スリーブにおけるスカート部と鍔部が同時に拡径し、スカート部外周側が穿孔穴に密着し、鍔部外周側がサドル付分水栓の内径に密着するようにしたものである。   In Patent Document 2, a wedge portion that gradually increases in diameter is formed on the outer peripheral surface of a metal sleeve, and the metal sleeve is closely inserted into a resin sleeve so as to expand the diameter. The anticorrosion sleeve includes a metal sleeve and a resin. The anti-corrosion part is composed of a two-layer structure of the sleeve, and when inserted, the skirt part and the collar part of the resin sleeve are expanded at the same time, the outer peripheral side of the skirt part is in close contact with the perforated hole, It is intended to be in close contact with the inner diameter.

特開２００６−４６５６４号公報JP 2006-46564 A 特開２００６−１００４７号公報JP 2006-10047 A

しかしながら、特許文献１及び特許文献２の何れも、次のような課題点を有している。
これを図１０に基づいて説明すると、樹脂スリーブ１の鍔部３は、スカート部２と
比較して肉厚が厚いので、金属スリーブ４が挿入されても拡径されにくく、鍔部３を拡径している際に挿入トルクが重くなり、続いて、挿入完了時は、金属スリーブ４の鍔４ａが樹脂スリーブ１の上端部１ａに当接すると、より挿入トルクが重くなるので、作業者は、一応挿入完了を手応えで感じとることができる。 However, both Patent Document 1 and Patent Document 2 have the following problems.
This will be described with reference to FIG. 10. Since the collar portion 3 of the resin sleeve 1 is thicker than the skirt portion 2, it is difficult to expand the diameter even if the metal sleeve 4 is inserted. When the diameter is increased, the insertion torque becomes heavy. Subsequently, when the insertion is completed, the insertion torque becomes heavier when the flange 4a of the metal sleeve 4 comes into contact with the upper end portion 1a of the resin sleeve 1. , You can feel the completion of insertion in response.

ところが、樹脂スリーブ１における鍔部拡径時が重いと、挿入トルク完了時の挿入トルクとの重さとの差を確実に判別することが極めて困難であり、挿入が完了しているにもかかわらず、更に挿入作業を続けることがあるため、鍔部３を必要以上に潰してしまい、結果的に、施工不良となるおそれを有していた。   However, when the flange diameter of the resin sleeve 1 is heavy, it is extremely difficult to reliably determine the difference from the weight of the insertion torque when the insertion torque is completed, even though the insertion is completed. Further, since the insertion operation may be continued, the collar part 3 is crushed more than necessary, and as a result, there is a possibility that the construction may be defective.

この対策として、樹脂スリーブ１の鍔部３の肉厚を拡径されやすいように、薄く設定すれば、鍔部自体の剛性がなくなって拡径されずに挿入方向へ潰れやすくなってしまい、そのため、正常に分水栓５の内部へ装着されないことになる。仮に、正常に装着されたとしても、分水栓５の内径部６への圧縮代は、水道本管８の穿孔穴７が芯ずれを起こした際でも圧縮されるように、鍔部３の肉厚を薄くする前と同等の圧縮代を設定しているので、肉厚が薄くなった分、圧縮率は上がったことになり、鍔部拡径時の挿入トルクは、更に重くなってしまう。   As a countermeasure against this, if the thickness of the flange portion 3 of the resin sleeve 1 is set thin so that the diameter can be easily increased, the rigidity of the flange portion itself is lost and the diameter is not increased, and the flange is easily crushed in the insertion direction. Therefore, it will not be properly mounted inside the water faucet 5. Even if it is normally attached, the compression allowance to the inner diameter portion 6 of the water faucet 5 is such that the perforation hole 7 of the water main pipe 8 is compressed even when the center misalignment occurs. Since the compression allowance equivalent to that before reducing the wall thickness is set, the compression rate has increased as the wall thickness has decreased, and the insertion torque at the time of expanding the buttock diameter has become even heavier. .

これとは、逆に、鍔部３の肉厚を厚くすれば、鍔部３の剛性も上がり、正常に、分水栓内径部６に装着され、圧縮率も下げられるが、肉厚が厚い分、樹脂スリーブ１の伸びが悪くなって、金属スリーブ４の挿入による拡径がされにくくなるため、樹脂スリーブ１の鍔部３が軸方向へ潰れてしまい、結果として、正常に防食スリーブを装着することができないことになる。   On the contrary, if the thickness of the collar part 3 is increased, the rigidity of the collar part 3 is also increased, and it is normally attached to the water faucet inner diameter part 6 and the compression rate is lowered, but the thickness is thick. Since the expansion of the resin sleeve 1 is deteriorated and the diameter of the resin sleeve 1 is not easily expanded by the insertion of the metal sleeve 4, the collar portion 3 of the resin sleeve 1 is crushed in the axial direction, and as a result, the anticorrosion sleeve is normally attached. You can't do that.

上述のことから、樹脂スリーブ１の鍔部３の拡径時における挿入トルクを下げ、金属スリーブ４の鍔４ａが、樹脂スリーブ１の上端部１ａに当接した際の挿入トルクとの差を大きくし、挿入完了の手応えを確実にするために、鍔部３の圧縮率を下げることが考えられるが、鍔部３の肉厚を厚くすれば、拡径されにくくなり、肉厚を薄くすれば圧縮率が上がってしまう等、相反する課題点が生じていた。   From the above, the insertion torque when the diameter of the flange portion 3 of the resin sleeve 1 is expanded is reduced, and the difference between the insertion torque when the flange 4a of the metal sleeve 4 contacts the upper end portion 1a of the resin sleeve 1 is increased. However, in order to ensure the response of the completion of insertion, it is conceivable to reduce the compression ratio of the collar part 3, but if the thickness of the collar part 3 is increased, it becomes difficult to expand the diameter, and if the thickness is reduced. Conflicting problems such as an increase in the compression ratio have occurred.

ここで、上記の従来例と後述する本発明における圧縮代と圧縮率について、図１０と図７に従って説明する。
ここにいう圧縮代とは、圧縮代＝（「樹脂スリーブ鍔部の拡径後の外径φＡ」−「分水栓通水流路の内径φＢ」）／２をいい、圧縮率とは、圧縮率＝「圧縮代」／「樹脂スリーブ鍔部の肉厚ｔ」をいう（以下同じ）。 Here, a compression allowance and a compression rate in the above-described conventional example and the present invention described later will be described with reference to FIGS.
The compression allowance here means the compression allowance = (“the outer diameter φA after expansion of the resin sleeve collar” − “the inner diameter φB of the water faucet water passage”) / 2, and the compression rate is the compression ratio Rate = “compression allowance” / “thickness t of resin sleeve collar” (hereinafter the same).

本発明は、上述の従来の課題点を解消するために開発したものであり、その目的をするところは、樹脂スリーブの鍔部の圧縮率を下げることによって、防食スリーブの挿入トルクを下げることを可能とし、防食スリーブの挿入完了時の挿入トルクと樹脂スリーブの鍔部拡径時の挿入トルクとの差を明確にすることによって挿入完了時の手応えを確実に感じとることにより、防食スリーブの装着作業における精度の向上を図ることにある。   The present invention has been developed to solve the above-described conventional problems, and the purpose of the present invention is to reduce the insertion torque of the anticorrosion sleeve by lowering the compression ratio of the flange portion of the resin sleeve. Installation work of the anti-corrosion sleeve is made possible by clarifying the difference between the insertion torque at the completion of the insertion of the anti-corrosion sleeve and the insertion torque at the expansion of the flange of the resin sleeve. The purpose is to improve accuracy in

上記の目的を達成するため、請求項１に係る発明は、大径の鍔部と小径のスカート状の装着部を有する樹脂スリーブの内周に金属製等の剛性スリーブを挿入して拡径させることにより分水栓内部に装着する防食スリーブであって、前記樹脂スリーブの鍔部外周に複数の外周溝を形成し、分水栓内部に圧接する樹脂スリーブにおける鍔部の圧縮率を下げるようにしたことを特徴とする防食スリーブである。   In order to achieve the above object, the invention according to claim 1 expands the diameter by inserting a rigid sleeve made of metal or the like into the inner periphery of a resin sleeve having a large-diameter collar portion and a small-diameter skirt-like mounting portion. Thus, the anticorrosion sleeve to be mounted inside the water faucet, wherein a plurality of outer peripheral grooves are formed on the outer periphery of the flange portion of the resin sleeve so as to reduce the compression ratio of the flange portion in the resin sleeve pressed against the inside of the water stopper. An anticorrosion sleeve characterized by the above.

請求項２に係る発明は、前記外周溝を前記鍔部の上方側領域に形成して、当該鍔部の下方側領域の剛性を保持させるようにした防食スリーブである。   The invention according to claim 2 is the anticorrosion sleeve in which the outer peripheral groove is formed in the upper region of the flange portion so that the rigidity of the lower region of the flange portion is maintained.

請求項３に係る発明は、外周溝の溝形状をアール形状に形成して、前記樹脂スリーブに対して軸方向の圧縮による剛性を保持するようにした防食スリーブである。   The invention according to claim 3 is the anticorrosion sleeve in which the groove shape of the outer peripheral groove is formed into a round shape so as to maintain the rigidity by the compression in the axial direction with respect to the resin sleeve.

請求項１に係る発明によると、樹脂スリーブの鍔部における圧縮率を下げることによって防食スリーブの挿入トルクを下げることができるため、防食スリーブ挿入完了時の挿入トルクと樹脂スリーブの鍔部拡径時の挿入トルクとの差を明確に区別することが可能となり、作業者は、挿入完了時の手応えを確実に感じとることができ、もって、防食スリーブの装着作業を正確にかつ迅速に行える。   According to the first aspect of the invention, since the insertion torque of the anticorrosion sleeve can be lowered by lowering the compression ratio at the flange portion of the resin sleeve, the insertion torque when the insertion of the anticorrosion sleeve is completed and the diameter of the flange portion of the resin sleeve are expanded. The difference between the insertion torque and the insertion torque can be clearly distinguished, and the operator can surely feel the response when the insertion is completed, so that the anticorrosion sleeve can be mounted accurately and quickly.

請求項２に係る発明によると、樹脂スリーブの鍔部の下方側領域に剛性が保持されるので、挿入トルクを抑制したまま、樹脂スリーブの鍔部を穿孔穴の縁部に確実に係止することができ、正常な防食スリーブの装着が可能となる。   According to the second aspect of the present invention, since rigidity is maintained in the lower region of the flange portion of the resin sleeve, the flange portion of the resin sleeve is securely locked to the edge portion of the perforated hole while suppressing the insertion torque. It is possible to attach a normal anticorrosion sleeve.

請求項３に係る発明によると、外周溝の溝形状をアール形状にすることによって、樹脂スリーブの軸方向の圧縮による剛性を保持することができ、正常な防食スリーブの装着が可能となる。   According to the invention which concerns on Claim 3, the rigidity by the compression of the axial direction of a resin sleeve can be hold | maintained by making the groove shape of an outer periphery groove | channel into a round shape, and mounting | wearing of a normal anti-corrosion sleeve is attained.

本発明における防食スリーブの実施形態を図面に基づいて説明する。
図１乃至図５は、本発明における防食スリーブの一例を示したもので、サドル付き分水栓を装着した水道本管の穿孔穴に防食スリーブを装着した状態を示す断面図である。同図において、スリーブ本体１０は、樹脂スリーブ１１の上方より金属製等からなる剛性スリーブ３１を挿入して構成したものである。 Embodiments of the anticorrosion sleeve according to the present invention will be described with reference to the drawings.
FIGS. 1 to 5 show an example of the anticorrosion sleeve in the present invention, and are sectional views showing a state in which the anticorrosion sleeve is attached to a perforation hole of a water main pipe to which a water faucet with a saddle is attached. In the figure, the sleeve body 10 is configured by inserting a rigid sleeve 31 made of metal or the like from above the resin sleeve 11.

本例において、樹脂スリーブ１１は、鋳鉄製などの水道本管５０に穿孔した穿孔穴５１に装着する装着部１２と分水栓４０の通水流路４１の内周面側に密着させる鍔部１４を有し、剛性スリーブ３１は、耐食性に優れたステンレス等の金属製からなるスリーブであり、この樹脂スリーブ１１に剛性スリーブ３１を挿入して拡径させることにより、装着部１２を穿孔穴５１に密着させて防食機能を発揮させる。   In this example, the resin sleeve 11 is attached to a perforated hole 51 perforated in a water main pipe 50 made of cast iron or the like, and a collar portion 14 closely attached to the inner peripheral surface side of the water flow passage 41 of the water faucet 40. The rigid sleeve 31 is a sleeve made of a metal such as stainless steel having excellent corrosion resistance. By inserting the rigid sleeve 31 into the resin sleeve 11 and expanding the diameter, the mounting portion 12 is formed in the perforated hole 51. Adheres closely to exert anticorrosion function.

樹脂スリーブ１１は、その上方部位に大径の鍔部１４が形成され、この鍔部１４の下方に一体に小径の装着部１２を形成している。装着部１２は、剛性スリーブ３１の挿入側開口の内径は、剛性スリーブ３１の小径部３２の外径よりも大径に形成している。   The resin sleeve 11 has a large-diameter collar portion 14 formed at an upper portion thereof, and a small-diameter mounting portion 12 is integrally formed below the collar portion 14. The mounting portion 12 is formed so that the inner diameter of the insertion side opening of the rigid sleeve 31 is larger than the outer diameter of the small diameter portion 32 of the rigid sleeve 31.

樹脂スリーブ１１は、滑り特性が良く、伸び特性が大きいポリエチレン等の樹脂によって形成され、装着部１２の外周面には、ゴム製からなる弾性スリーブ３８を装着している。樹脂スリーブ１１と弾性スリーブ３８とが一体化し、樹脂スリーブ１１と剛性スリーブ３１によりスリーブ本体１０を構成して装着工具５５で挿入したとき、樹脂スリーブ１１が拡径すると同時に弾性スリーブ３８も拡径し、水道本管５０の穿孔穴５１の孔壁５２の切削面部分に、弾性スリーブ３８が密着して防食機能を発揮する。   The resin sleeve 11 is formed of a resin such as polyethylene having good sliding characteristics and large elongation characteristics, and an elastic sleeve 38 made of rubber is mounted on the outer peripheral surface of the mounting portion 12. When the resin sleeve 11 and the elastic sleeve 38 are integrated, and the sleeve body 10 is constituted by the resin sleeve 11 and the rigid sleeve 31 and is inserted by the mounting tool 55, the diameter of the resin sleeve 11 and the elastic sleeve 38 are increased. The elastic sleeve 38 is brought into close contact with the cutting surface portion of the hole wall 52 of the perforated hole 51 of the water main pipe 50 and exhibits the anticorrosion function.

鍔部１４の上方内周側には、係止突部１４ａを形成しており、剛性スリーブ３１の挿入時には、この係止突部１４ａを剛性スリーブ３１の小径部３２の上方位置に形成した係止溝３２ａに係止させて剛性スリーブ３１の小径部３２を鍔部１４に内挿した状態で仮組でき、この仮組状態から、穿孔穴５１の孔壁５２の切削面部分への密着を行いえる構造となっている。   A locking projection 14 a is formed on the upper inner peripheral side of the flange portion 14. When the rigid sleeve 31 is inserted, the locking projection 14 a is formed above the small diameter portion 32 of the rigid sleeve 31. It is possible to temporarily assemble the small diameter portion 32 of the rigid sleeve 31 inserted into the flange portion 14 by being engaged with the stop groove 32a. It has a structure that can be done.

図６及び図７において、樹脂スリーブ１１における鍔部１４の外周面に凹状の外周溝１３を複数形成している。この複数の外周溝１３の形成位置は、鍔部１４の上方側領域の外周に形成されており、鍔部１４の下方側領域が、樹脂スリーブ１１の鍔部１４を穿孔穴５１の縁部に係止するために必要な強度を保持している。したがって、穿孔穴５１の芯が極端にずれても剛性スリーブ３１の挿入により鍔部１４は穿孔穴５１に引きこまれず、正常に分水栓４０に装着される。この外周溝は、図９に示すように、溝形状をアール形状または円弧状の外周溝１３ａに形成することにより、樹脂スリーブ１１の軸方向への圧縮による剛性を保持することが可能となる。   6 and 7, a plurality of concave outer peripheral grooves 13 are formed on the outer peripheral surface of the flange portion 14 in the resin sleeve 11. The formation positions of the plurality of outer peripheral grooves 13 are formed on the outer periphery of the upper region of the flange portion 14, and the lower region of the flange portion 14 makes the flange portion 14 of the resin sleeve 11 the edge of the perforated hole 51. The strength required for locking is maintained. Therefore, even if the core of the perforated hole 51 is extremely displaced, the flange portion 14 is not drawn into the perforated hole 51 by the insertion of the rigid sleeve 31 and is normally attached to the water faucet 40. As shown in FIG. 9, the outer circumferential groove is formed in a rounded or arcuate outer circumferential groove 13 a so that the rigidity of the resin sleeve 11 due to compression in the axial direction can be maintained.

この外周溝１３は、その深さを鍔部１４の肉厚の３０〜３５％に抑えることによって、鍔部１４の剛性が保持され、挿入時に発生する剛性スリーブ３１の挿入による軸方向への力に対して鍔部１４が圧壊することなく、正常に拡径されることになる。また、外周溝１３の深さは、深くするほど圧縮率は下げられるが、実際の圧縮代より過分に溝を深くしてもその効果はなく、溝を深くしすぎると、鍔部１４の軸方向への剛性がなくなり、剛性スリーブ３１の挿入により鍔部１３は正常に拡径されず、軸方向に圧壊してしまい、装着不良となるので、次に示す設定が好ましい。   The outer circumferential groove 13 is kept at a depth of 30 to 35% of the thickness of the flange 14 so that the rigidity of the flange 14 is maintained, and the axial force generated by the insertion of the rigid sleeve 31 generated at the time of insertion is maintained. On the other hand, the diameter of the collar portion 14 is normally expanded without being crushed. Further, the compression ratio is lowered as the depth of the outer circumferential groove 13 is increased. However, even if the groove is excessively deepened than the actual compression allowance, there is no effect. Since the rigidity in the direction is lost and the flange portion 13 is not normally expanded by insertion of the rigid sleeve 31, it is crushed in the axial direction, resulting in poor mounting.

その一例は、圧縮率を下げる効果と軸方向への剛性を保持するために、溝の深さは、鍔部１４の肉厚の３０〜３５％に抑えるのが好ましく、外周溝１３の深さは、圧縮代＋圧縮代×約２０％が好ましい。特に、防食スリーブが呼び径２５Ａの場合、鍔部１４の肉厚は１．５ｍｍ、外周溝１３の深さは０．５ｍｍ、溝の幅Ｃは、Ｏリング装着用の溝幅よりも小さい、０．５〜１ｍｍが良く、外周溝１３の圧縮代は０．４ｍｍが良好である。また、鍔部１４の外周面の外周溝１３と外周溝１３との間隔は、本例の場合、１ｍｍが好ましい。なお、防食スリーブは、呼び径２５Ａの場合について説明したが、その他の呼び径を有する防食スリーブは、呼び径２５Ａの場合の上記設定値に対応してそれぞれ実施に応じて任意に設定するものとする。   For example, in order to maintain the effect of reducing the compression ratio and the rigidity in the axial direction, the depth of the groove is preferably 30 to 35% of the wall thickness of the flange 14, and the depth of the outer circumferential groove 13. Is preferably compression margin + compression margin × about 20%. In particular, when the anticorrosion sleeve has a nominal diameter of 25A, the thickness of the flange 14 is 1.5 mm, the depth of the outer peripheral groove 13 is 0.5 mm, and the groove width C is smaller than the groove width for mounting the O-ring. 0.5-1 mm is good, and the compression allowance of the outer peripheral groove 13 is 0.4 mm. In the present example, the distance between the outer circumferential groove 13 and the outer circumferential groove 13 on the outer circumferential surface of the flange 14 is preferably 1 mm. In addition, although the anticorrosion sleeve demonstrated the case of the nominal diameter 25A, the anticorrosion sleeve which has other nominal diameters shall be arbitrarily set according to implementation corresponding to the said setting value in the case of the nominal diameter 25A, respectively. To do.

また、水道本管５０の外面には、図示しないボルト・ナットを介して、サドル５３並びに図示しないバンドが固着されている。本例においては、水道本管５０を単一材料によって形成した例を示しているが、この水道本管５０は、内面に図示しないモルタルライニング層又は樹脂ライニング層等の別材料を積層したものであってもよい。   Further, a saddle 53 and a band (not shown) are fixed to the outer surface of the water main pipe 50 via bolts and nuts (not shown). In this example, the water main 50 is formed of a single material. However, the water main 50 is formed by laminating another material such as a mortar lining layer or a resin lining layer (not shown) on the inner surface. There may be.

サドル付き分水栓４０は、枝管を接続するための継手部４２ａを備えた分岐部４２を有し、内部には本管５０から支管へ分岐配管を行うための止水機構４３を内蔵している。この止水機構４３は、Ｔ字型の貫通孔４４ａを有するボール４４と、このボール４４を回動自在に設けた図示しないステムと、一対のボールシート４５、４５から構成されている。シール部材（以下、ガスケットという）４６は、ゴム製などによって形成され、サドル５３と本管５０との間に装着してこれらをシールする機能を有している。なお、分水栓４０は、本例以外の構造であってもよく、例えば、図示しないブッシュ部を設けた構造にも適用可能であることは勿論である。ブッシュ部を設けた場合、ガスケット４６の変形による通水口径の縮小を防ぐ働きを発揮することが可能となる。   The saddle-equipped water faucet 40 has a branch portion 42 having a joint portion 42a for connecting branch pipes, and has a water stop mechanism 43 for branching piping from the main pipe 50 to the branch pipe. ing. The water stop mechanism 43 includes a ball 44 having a T-shaped through hole 44a, a stem (not shown) in which the ball 44 is rotatably provided, and a pair of ball sheets 45 and 45. A seal member (hereinafter referred to as a gasket) 46 is formed of rubber or the like, and has a function of mounting between the saddle 53 and the main pipe 50 to seal them. It should be noted that the water faucet 40 may have a structure other than this example, and for example, can be applied to a structure provided with a bush portion (not shown). When the bush portion is provided, it is possible to exert the function of preventing the water passage diameter from being reduced due to the deformation of the gasket 46.

次に、上記実施形態の防食スリーブを仮組みする場合の手順を説明する。本実施形態においてスリーブ本体１０を装着する装着工具５５は、先端側に係止部５６、途中に傾斜面部を有している。係止部５６は、仮組みしたスリーブ本体１０を取り付ける際に、樹脂スリーブ１１の先端に設けた爪部１６を係止させるものである。   Next, the procedure for temporarily assembling the anticorrosion sleeve of the above embodiment will be described. In the present embodiment, the mounting tool 55 for mounting the sleeve body 10 has a locking portion 56 on the tip side and an inclined surface portion in the middle. The locking portion 56 is for locking the claw portion 16 provided at the tip of the resin sleeve 11 when the temporarily assembled sleeve body 10 is attached.

仮組み時には、先ず、開口部より剛性スリーブ３１を挿入して、この剛性スリーブ３１の先端部３６を樹脂スリーブ１１の内周面側に形成したテーパ段部に当接させる。このとき、同時に樹脂スリーブ１１の係止突部１４ａが剛性スリーブ３１の係止溝３２ａに係止して仮組みされ、しかも、小径部３２の外周側が鍔部１４内周側の略全周に渡って面接触されて保持されるので、樹脂スリーブ１１と剛性スリーブ３１は確実に同軸上に保持され、剛性スリーブ３１の挿入が円滑に行われる状態に仮着される。   At the time of provisional assembly, first, the rigid sleeve 31 is inserted from the opening, and the distal end portion 36 of the rigid sleeve 31 is brought into contact with the tapered step formed on the inner peripheral surface side of the resin sleeve 11. At this time, the locking projection 14a of the resin sleeve 11 is simultaneously locked and temporarily assembled in the locking groove 32a of the rigid sleeve 31, and the outer peripheral side of the small-diameter portion 32 is substantially the entire periphery on the inner peripheral side of the flange portion 14. Since the resin sleeve 11 and the rigid sleeve 31 are securely held on the same axis, the resin sleeve 11 and the rigid sleeve 31 are temporarily attached so that the rigid sleeve 31 can be smoothly inserted.

続いて、仮組みが成されたこのスリーブ本体１０を、操作杆が螺着された装着工具５５の筒体に仮固定する。このとき、樹脂スリーブ１１の下端に設けた爪部１６は、突状係止部５６に係止して、装着工具５５からの抜け落ちを防ぐと共に、スリーブ本体１０が水平を保つことができるよう機能する。装着工具５５は、スリーブ本体１０と共に、図示しないアタッチメントアダプタを取付けた分水栓４０に取付けられ、スリーブ本体１０は、この装着工具５５を介して本管５０の穿孔穴５１の装着位置に配設される。   Subsequently, the sleeve body 10 that has been temporarily assembled is temporarily fixed to the cylinder of the mounting tool 55 to which the operation rod is screwed. At this time, the claw portion 16 provided at the lower end of the resin sleeve 11 is locked to the projecting locking portion 56 to prevent the claw portion 16 from falling off the mounting tool 55 and to keep the sleeve body 10 horizontal. To do. The mounting tool 55 is attached to the water faucet 40 to which an attachment adapter (not shown) is attached together with the sleeve main body 10, and the sleeve main body 10 is disposed at the mounting position of the perforated hole 51 of the main pipe 50 through the mounting tool 55. Is done.

次いで、本発明における上記実施形態の防食スリーブを装着する場合の装着手順を図１及び図５に従って説明する。図１に示すように、図示しないハンドルを回し、本管５０に設けた穿孔穴５１に装着工具５５の操作杆を挿入する。防食スリーブ本体１０は、樹脂スリーブ１１の装着部１２を剛性スリーブ３１の挿入側を大径にしたテーパ部とし、先端側を縮径状に設けているので、この装着部１２が穿孔穴５１に滑り込むようにして樹脂スリーブ１１全体が案内される。これにより、穿孔穴５１がずれている場合でも、装着部１２は調芯されながら確実に案内され、挿入時に偏芯した力が加わるのを防いで、均等な挿入力を働かせることができる。   Next, a mounting procedure for mounting the anticorrosion sleeve according to the above embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a handle (not shown) is turned, and an operating rod for the mounting tool 55 is inserted into a hole 51 provided in the main pipe 50. The anticorrosion sleeve main body 10 has the mounting portion 12 of the resin sleeve 11 as a tapered portion having a large diameter on the insertion side of the rigid sleeve 31 and a reduced diameter at the distal end side. The entire resin sleeve 11 is guided so as to slide. Thereby, even when the perforated hole 51 is displaced, the mounting portion 12 is reliably guided while being aligned, and it is possible to apply an even insertion force by preventing an eccentric force from being applied during insertion.

続いて、装着工具５５を挿入すると、樹脂スリーブ１１の鍔部１４下面に設けた段差部１５が弾性スリーブ３８を介して穿孔穴５１の孔縁に係止する。これにより、剛性スリーブ１１の挿入時における変形や落ち込みを防いでいる。   Subsequently, when the mounting tool 55 is inserted, the step portion 15 provided on the lower surface of the flange portion 14 of the resin sleeve 11 is locked to the hole edge of the perforated hole 51 via the elastic sleeve 38. Thereby, the deformation | transformation and fall at the time of insertion of the rigid sleeve 11 are prevented.

装着工具５５を図１の状態から図２の状態に挿入すると、装着工具５５の係止部５６と樹脂スリーブ１１の爪部１６との係合状態が解除され、続いて、装着工具５５の押圧部５８が剛性スリーブ３１のフランジ部３５に当接する。剛性スリーブ３１は、挿入方向に押し込まれようとするが、段差部１５によって挿入方向への移動は阻止される。
更に、挿入工具５５を挿入すると、樹脂スリーブ１１と剛性スリーブ３１との仮組みが解除され、剛性スリーブ３１が樹脂スリーブ１１内に挿入されることにより、樹脂スリーブ１１は順次拡径される。作業者は、このときから挿入トルクの増加を感じ始めることができる。 When the mounting tool 55 is inserted from the state shown in FIG. 1 to the state shown in FIG. 2, the engagement state between the locking portion 56 of the mounting tool 55 and the claw portion 16 of the resin sleeve 11 is released. The portion 58 contacts the flange portion 35 of the rigid sleeve 31. The rigid sleeve 31 tends to be pushed in the insertion direction, but the step portion 15 prevents movement in the insertion direction.
Further, when the insertion tool 55 is inserted, the temporary assembly between the resin sleeve 11 and the rigid sleeve 31 is released, and the rigid sleeve 31 is inserted into the resin sleeve 11 so that the diameter of the resin sleeve 11 is sequentially increased. The worker can begin to feel an increase in insertion torque from this time.

更に、図３において、挿入工具５５の挿入を続けると、剛性スリーブ３１の小径部３２は、引き続き樹脂スリーブ１１の装着部１２を拡径し続け、水道本管５０の穿孔穴５１への密着状態を続け、同時に、剛性スリーブ３１の大径部３３が樹脂スリーブ１１の鍔部１４を拡径し、分水栓４０の通水流路４１の内周面への密着を始める。   Further, in FIG. 3, when the insertion tool 55 is continuously inserted, the small diameter portion 32 of the rigid sleeve 31 continues to expand the mounting portion 12 of the resin sleeve 11, and is in close contact with the perforated hole 51 of the water main pipe 50. At the same time, the large-diameter portion 33 of the rigid sleeve 31 expands the flange portion 14 of the resin sleeve 11, and starts to adhere to the inner peripheral surface of the water flow passage 41 of the water faucet 40.

このとき、図７に示すように、樹脂スリーブ１１に設けた複数の外周溝１３を有する鍔部１４は、拡径されながら、分水栓４０の通水流路４１の内周に所定の圧縮代をもち、かつ圧縮率を下げた状態で密着していく。ここでいう圧縮代とは、圧縮代＝（「樹脂スリーブ鍔部の拡径後の外径φＡ」−「分水栓通水流路の内径φＢ」）／２をいい、圧縮率とは、圧縮率＝「圧縮代」／「樹脂スリーブ鍔部の肉厚ｔ」をいう。   At this time, as shown in FIG. 7, the flange portion 14 having a plurality of outer peripheral grooves 13 provided in the resin sleeve 11 is expanded in diameter while a predetermined compression allowance is provided on the inner periphery of the water flow passage 41 of the water faucet 40. It has close contact with the compression ratio lowered. The compression allowance here means compression allowance = (“the outer diameter φA after expansion of the resin sleeve collar” − “the inner diameter φB of the water faucet water passage”) / 2, and the compression rate is the compression ratio Rate = “compression allowance” / “thickness t of resin sleeve collar”.

この場合、樹脂スリーブ１１の鍔部１４に設けた複数の外周溝１３の領域は、図３に示すように、剛性スリーブ３１の大径部３３により鍔部１４を順次拡径して挿入工程が行われるので、この状態の挿入工程全域における挿入トルクの低減効果が発揮され、鍔部１４に外周溝を設けない場合に比較して、挿入工具５５の挿入トルクは、軽く操作が可能であり、作業者も軽い挿入トルクを感じることが可能となる。   In this case, as shown in FIG. 3, the region of the plurality of outer peripheral grooves 13 provided in the flange portion 14 of the resin sleeve 11 is subjected to an insertion process by sequentially expanding the flange portion 14 by the large diameter portion 33 of the rigid sleeve 31. Since this is performed, the effect of reducing the insertion torque in the entire insertion process in this state is exhibited, and the insertion torque of the insertion tool 55 can be lightly operated as compared with the case where the outer circumferential groove is not provided in the flange portion 14, The operator can also feel a light insertion torque.

挿入を更に続けると、図４に示すように、剛性スリーブ３１のフランジ部３５が樹脂スリーブ１１の鍔部に外周溝を設けない場合と比較して、樹脂スリーブ１１の鍔部１４の拡径時の挿入トルクは軽くなっているので、剛性スリーブ３１のフランジ部３５が樹脂スリーブ１１の上端部に当接したときの挿入トルクに対して挿入トルクの差が大きくなっているため、より明確に挿入完了の手応えを感じ取ることができる。その後、操作杆を引き上げて装着工具５５を外すことにより装着作業が完了となる。   When the insertion is further continued, as shown in FIG. 4, when the flange portion 35 of the rigid sleeve 31 is not provided with an outer peripheral groove in the flange portion of the resin sleeve 11, the diameter of the flange portion 14 of the resin sleeve 11 is increased. Since the insertion torque of the rigid sleeve 31 is lighter, the difference between the insertion torque and the insertion torque when the flange portion 35 of the rigid sleeve 31 abuts against the upper end of the resin sleeve 11 is increased. You can feel the response of completion. Thereafter, the mounting operation is completed by lifting the operating rod and removing the mounting tool 55.

以上のように、樹脂スリーブ１１の鍔部１４の外周に複数の外周溝１３を形成したので、分水栓４０の通水流路４１の内周面と鍔部１４との圧縮率を部分的に下げることができ、剛性スリーブ３１のフランジ部３５が樹脂スリーブ１１の上端部へ当接したときの挿入トルクに対して、差が大きく、挿入完了を感じとることができ、過剰な押し込みすぎを防止することができる。なお、外周溝１３を形成していない部分の、樹脂スリーブ１１の鍔部１４における外径φＡ（最大外径）は、従来と同寸法であり、通水流路４１の内周面とのシール性は維持されている。   As described above, since the plurality of outer peripheral grooves 13 are formed on the outer periphery of the flange portion 14 of the resin sleeve 11, the compression ratio between the inner peripheral surface of the water flow passage 41 of the water faucet 40 and the flange portion 14 is partially determined. There is a large difference with respect to the insertion torque when the flange portion 35 of the rigid sleeve 31 comes into contact with the upper end portion of the resin sleeve 11, and it can be felt that the insertion has been completed, preventing excessive push-in. be able to. The outer diameter φA (maximum outer diameter) of the flange portion 14 of the resin sleeve 11 in the portion where the outer peripheral groove 13 is not formed is the same as the conventional one, and the sealing performance with the inner peripheral surface of the water flow channel 41 is the same. Is maintained.

図８は、防食スリーブが芯ずれ状態で挿入された場合のシール性を示した断面説明図である。
穿孔穴５１が分水栓４０と芯ずれが大きい場合、鍔部１４の下方領域に外周溝が形成されていると、鍔部１４の下方に剛性がなく、剛性スリーブ３１が挿入されると同時に、鍔部１４が穿孔穴５１に引き込まれるおそれがあるが、本発明は、鍔部１４の上方側領域に外周溝１３を複数設け、鍔部１４の肉厚も所定の厚みを有しているので、鍔部１４の下方側領域は、剛性を保持している。したがって、穿孔穴５１の芯が極端にずれている場合であっても、図８に示すように、樹脂スリーブ１１の鍔部１４が挿入時に穿孔穴５１へ引き込まれることなく、鍔部１４と分水栓４０の通水流路４１の内壁とのシール性を確実に保持することができる。 FIG. 8 is an explanatory cross-sectional view showing the sealing performance when the anticorrosion sleeve is inserted in a misaligned state.
When the perforated hole 51 is largely misaligned with the water faucet 40, if an outer peripheral groove is formed in the lower region of the flange 14, there is no rigidity below the flange 14 and the rigid sleeve 31 is inserted at the same time. However, in the present invention, a plurality of outer peripheral grooves 13 are provided in the upper region of the flange 14, and the thickness of the flange 14 has a predetermined thickness. Therefore, the lower side region of the collar portion 14 retains rigidity. Therefore, even when the core of the perforated hole 51 is extremely displaced, the collar 14 of the resin sleeve 11 is not drawn into the perforated hole 51 during insertion as shown in FIG. The sealing property with the inner wall of the water flow path 41 of the water faucet 40 can be reliably maintained.

本例における鍔部１４の外周溝１３と外周溝１３との間隔部位であるフィンの厚みは、防食スリーブの呼び径が２５Ａの場合、１ｍｍが好ましく、この厚みであれば鍔部１４が穿孔穴５１に引き込まれることはなく、鍔部１４は十分に剛性を保持し、シール性が確保される。   In this example, the thickness of the fin, which is the space between the outer circumferential groove 13 and the outer circumferential groove 13 of the flange 14, is preferably 1 mm when the nominal diameter of the anticorrosion sleeve is 25 A. The collar portion 14 is not sufficiently drawn into the flange 51 and sufficiently retains rigidity, thereby ensuring a sealing property.

上記の例は、弾性スリーブを外周に設けた樹脂スリーブと剛性スリーブとの三層構造の例を示したが、これに限ることなく樹脂スリーブと金属スリーブなどの二層構造の防食スリーブにも勿論適用でき、その他の防食スリーブにも応用可能である。   The above example shows an example of a three-layer structure of a resin sleeve and a rigid sleeve provided with an elastic sleeve on the outer periphery. However, the present invention is not limited to this, and a two-layer structure anticorrosion sleeve such as a resin sleeve and a metal sleeve is of course also used. Applicable to other anti-corrosion sleeves.

本発明における防食スリーブの分水栓と金属製本管への装着状態を示す断面図である。It is sectional drawing which shows the mounting state to the water stopper and metal main pipe of the anti-corrosion sleeve in this invention. 本発明の防食スリーブの装着を開始した状態を示した断面図である。It is sectional drawing which showed the state which started mounting | wearing with the anti-corrosion sleeve of this invention. 図２の防食スリーブが更に挿入した状態を示した断面図である。FIG. 3 is a cross-sectional view showing a state where the anticorrosion sleeve of FIG. 2 is further inserted. 防食スリーブの装着が完了した状態を示した断面図である。It is sectional drawing which showed the state which mounting | wearing of the anti-corrosion sleeve was completed. 図４における装着工具を引き抜いた状態を示した断面図である。It is sectional drawing which showed the state which extracted the mounting tool in FIG. 防食スリーブの仮組み状態を示した半截断面図である。It is half-sectional view which showed the temporary assembly state of the anti-corrosion sleeve. 樹脂スリーブと分水栓とのシール状態を示す説明図である。It is explanatory drawing which shows the sealing state of a resin sleeve and a water stopper. 防食スリーブが斜めに挿入された状態を示す断面図である。It is sectional drawing which shows the state in which the anticorrosion sleeve was inserted diagonally. 樹脂スリーブの外周溝の他例を示した部分説明図である。It is the partial explanatory view showing other examples of the peripheral groove of a resin sleeve. 防食スリーブと分水栓とのシール状態の従来例を示した断面図である。It is sectional drawing which showed the prior art example of the sealing state of a corrosion prevention sleeve and a water faucet.

符号の説明Explanation of symbols

１１ 樹脂スリーブ
１２ 装着部
１２ａ 切欠溝
１３ 外周溝
１３ａ 外周溝（アール状）
１４ 鍔部
１４ａ 係止突部
３１ 剛性スリーブ
３２ 小径部
３３ 大径部
３８ 弾性スリーブ
４０ 分水栓
４１ 通水流路
５０ 水道本管
５１ 穿孔穴
５２ 孔壁 11 resin sleeve 12 mounting part 12a notch groove 13 outer peripheral groove 13a outer peripheral groove (R-shaped)
14 collar portion 14a locking projection 31 rigid sleeve 32 small diameter portion 33 large diameter portion 38 elastic sleeve 40 water faucet 41 water flow channel 50 water main pipe 51 perforated hole 52 hole wall

Claims (3)

大径の鍔部と小径のスカート状の装着部を有する樹脂スリーブの内周に金属製等の剛性スリーブを挿入して拡径させることにより分水栓内部に装着する防食スリーブであって、前記樹脂スリーブの鍔部外周に複数の外周溝を形成し、分水栓内部に圧接する樹脂スリーブにおける鍔部の圧縮率を下げるようにしたことを特徴とする防食スリーブ。   A corrosion-resistant sleeve that is mounted inside a water faucet by inserting a rigid sleeve made of metal or the like into the inner periphery of a resin sleeve having a large-diameter collar portion and a small-diameter skirt-shaped mounting portion, An anticorrosion sleeve characterized in that a plurality of outer circumferential grooves are formed on the outer periphery of the flange portion of the resin sleeve so as to reduce the compression ratio of the flange portion in the resin sleeve pressed into the water faucet. 前記外周溝を前記鍔部の上方側領域に形成して、当該鍔部の下方側領域の剛性を保持させるようにした請求項１に記載の防食スリーブ。   The anti-corrosion sleeve according to claim 1, wherein the outer peripheral groove is formed in an upper region of the flange portion so as to maintain rigidity of a lower region of the flange portion. 前記外周溝の溝形状をアール形状に形成して、前記樹脂スリーブに対して軸方向の圧縮による剛性を保持するようにした請求項１又は２に記載の防食スリーブ。   The anticorrosion sleeve according to claim 1 or 2, wherein a groove shape of the outer peripheral groove is formed in a round shape so as to maintain rigidity by compression in an axial direction with respect to the resin sleeve.
JP2007115958A 2007-04-25 2007-04-25 Anticorrosion sleeve Active JP4933340B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111578023A (en) * 2019-02-19 2020-08-25 温玉华 Flow divider with bolt valve for pipeline saddle

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JP5536169B2 (en) * 2012-10-15 2014-07-02 前澤給装工業株式会社 Adhesive core for water faucet and mounting method

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JPS536729B2 (en) * 1974-04-15 1978-03-10
JP4033313B2 (en) * 1998-08-21 2008-01-16 株式会社水道技術開発機構 Corrosion prevention bush
JP4531479B2 (en) * 2004-08-06 2010-08-25 株式会社キッツ Anticorrosion sleeve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111578023A (en) * 2019-02-19 2020-08-25 温玉华 Flow divider with bolt valve for pipeline saddle

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