JP2008082418A

JP2008082418A - Packing

Info

Publication number: JP2008082418A
Application number: JP2006262099A
Authority: JP
Inventors: Yoshinori Maeda; 芳則前田; Hiroyuki Machida; 浩之町田
Original assignee: Cosmo Koki Co Ltd
Current assignee: Cosmo Koki Co Ltd
Priority date: 2006-09-27
Filing date: 2006-09-27
Publication date: 2008-04-10
Anticipated expiration: 2026-09-27
Also published as: JP4864621B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pair of packings attached to facing surfaces of split cases, capable of surely fitting protruding portions and recessed portions of the packings to each other and solving such a problem that split cases which are equipped with packings having protruding portions are erroneously coupled to each other or split cases which are equipped with packings having recessed portions are erroneously coupled to each other. <P>SOLUTION: The respective packings attached to the facing surfaces of the split cases 1a, 1b have the same shape including the protruding portions 15 projecting from the facing surface and the recessed portions 16 recessed in the direction opposite to the protruding portions 15. All the protruding portions 15 of the packing attached to the first split case 1a and all the recessed portions 16 of the packing attached to the second split case 1b are fitted to each other, and all the recessed portions 16 of the packing attached to the first split case 1a and all the protruding portions 15 of the packing attached to the second split case 1b are fitted to each other, thereby sealing the interior of the split cases 1a, 1b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、流体管の周囲を被覆する分割ケースの対向面に沿って夫々装着されており、前記分割ケース内部を密封する一対のパッキンに関する。 The present invention relates to a pair of packings that are respectively mounted along opposing surfaces of a split case that covers the periphery of a fluid pipe, and seals the inside of the split case.

水道管等の流体管が破損して漏水しているのを補修する場合に使用される補修カバーや、埋設されている流体管に分岐管を接続する場合に使用される割Ｔ字管は、流体管の周囲を被覆する複数に分割されたケースと、該ケースを流体管に水密に設置する複数の円弧状パッキンとから構成されるのが一般的である。 The repair cover used when repairing fluid pipes such as water pipes that are damaged and leaking, and the split T-shaped pipe used when connecting a branch pipe to an embedded fluid pipe, Generally, it is composed of a plurality of cases that cover the periphery of the fluid pipe and a plurality of arc-shaped packings that are installed in a fluid-tight manner on the fluid pipe.

流体管の補修をおこなう部材として、図１３に示すような補修カバー１００が知られている。この従来の補修カバー１００は、流体管１０８の外周部から互いに連結、分解可能なボルト孔を形成したフランジ１０２が設けてある三つのケース１０１と、その内面に形成されたパッキン収納凹部１０６に装着される三つのパッキン１０３とからなる。 A repair cover 100 as shown in FIG. 13 is known as a member for repairing a fluid pipe. This conventional repair cover 100 is attached to three cases 101 provided with flanges 102 formed with bolt holes that can be connected to each other and disassembled from the outer periphery of the fluid pipe 108 and a packing storage recess 106 formed on the inner surface thereof. The three packings 103 are formed.

パッキン１０３は、流体管１０８の外周面に圧接する円弧状のシール部１０４と、シール部１０４の両端に設けたフランジシール部１０５からなり、各パッキン１０３のフランジシール部１０５同士を接続してリング状に構成されている。 The packing 103 includes an arc-shaped seal portion 104 that is in pressure contact with the outer peripheral surface of the fluid pipe 108, and flange seal portions 105 provided at both ends of the seal portion 104, and the flange seal portions 105 of each packing 103 are connected to each other to form a ring. Configured.

前記ケース１０１を流体管１０８の外周に被覆し、対向するフランジ１０２、１０２をボルト・ナット１０７によって締め付けると、フランジシール部１０５、１０５が互いに圧接され、円弧状のシール部１０４が流体管１０８の外周面に圧接することで、補修カバー１００は水密性を保持して流体管１０８に装着される。 When the case 101 is covered on the outer periphery of the fluid pipe 108 and the opposing flanges 102 and 102 are tightened by bolts and nuts 107, the flange seal parts 105 and 105 are pressed against each other, and the arc-shaped seal part 104 is connected to the fluid pipe 108. The repair cover 100 is attached to the fluid pipe 108 while maintaining water tightness by being pressed against the outer peripheral surface.

従来の補修カバー等における分割ケースのフランジ部を止水するパッキンは、板状に形成されているので、所定の水密性を得るためにパッキンを突き合わせて圧縮するには大きな力を必要とするため、フランジをボルト・ナットで高トルクを与えて締め付ける必要があった。また、土圧等によって流体管やケースが変形したときや、締結してあるフランジが少しでも開いたときにはフランジ部より漏水するという問題があった。 Since the packing that stops the flange of the split case in a conventional repair cover or the like is formed in a plate shape, a large force is required to abut and compress the packing in order to obtain a predetermined water tightness. It was necessary to tighten the flange with high torque by using bolts and nuts. In addition, there is a problem that water leaks from the flange portion when the fluid pipe or the case is deformed due to earth pressure or when the fastened flange opens even a little.

そこで上記問題を解決すべく、例えば特許文献１に示すように本出願人は、流体管を支持するフランジを水密に接続するため、フランジに取付けられるパッキンの一方を対向する他方のパッキンの方向に突き出た凸状部が板状の基部に形成され、また該凸状部で形成されたパッキンを嵌合するために他方のパッキンに凹状部を形成したものを開発した。 In order to solve the above problem, for example, as shown in Patent Document 1, the applicant of the present application connects one of the packings attached to the flange in the direction of the other packing in order to connect the flange supporting the fluid pipe in a watertight manner. A projecting convex part was formed on a plate-like base part, and the other packing was formed with a concave part in order to fit the packing formed by the convex part.

特開２００１−２２１３８７号公報JP 2001-221387 A

しかしながら、一方を凸状部で形成され、他方を凹状部で形成された構造の２種類のパッキンでは、パッキン取替えにおいて間違って凸状部で形成されたパッキンが設置された分割ケース同士を重着したり、あるいは凹状部で形成されたパッキンが設置された分割ケース同士を重着してしまい、フランジが流体管に水密に設置されないといった問題が生じることがあった。 However, in the case of two types of packings in which one is formed with a convex part and the other is formed with a concave part, the split cases where the packings formed with the convex part are mistakenly installed in packing replacement are overlapped. Or the case where the packings formed with the concave portions are placed on each other, and the flange is not installed in a fluid-tight manner in the fluid pipe.

特に、流体管が破損して漏水している等の緊急時においては、上記構造をしたパッキンを装着した分割ケースの重着の際に、上記の間違いが発生し易くなる。また、凹状部、凸状部と２種類のパッキンを要するため、製造コストがかかるといった問題もある。 In particular, in an emergency such as when a fluid pipe is broken and water leaks, the above-described mistake is likely to occur when the divided case to which the packing having the above structure is attached. Moreover, since a concave part, a convex part, and two types of packing are required, there also exists a problem that manufacturing cost starts.

本発明は、このような問題点に着目してなされたもので、分割ケースの対向面に夫々装着された一対のパッキンの凸状部と凹状部とを間違えることなく嵌合でき、凸状パッキンを装着された分割ケース同士を間違って重着したり、あるいは凹状パッキンが装着された分割ケース同士を間違って重着したりするといった問題を解消できる一対のパッキンを提供することを目的とする。 The present invention has been made paying attention to such problems, and can fit the convex portions and the concave portions of the pair of packings respectively attached to the opposing surfaces of the split case without making mistakes. It is an object of the present invention to provide a pair of packings that can solve the problem of erroneously attaching the divided cases with the gaskets or erroneously attaching the divided cases with the concave packings.

前記課題を解決するために、本発明の請求項１に記載の一対のパッキンは、流体管の周囲を被覆する分割ケースの対向面に沿って夫々装着されており、前記分割ケース内部を密封する一対のパッキンであって、
前記分割ケースの対向面に装着された夫々のパッキンは、該対向面より突出した凸状部と、該凸状部と反対方向に窪んだ凹状部とを備えた同一の形状を有しており、
前記分割ケースは第１分割ケースと第２分割ケースとからなり、前記第１分割ケースに装着された側のパッキンの凸状部全部と、前記第２分割ケースに装着された側のパッキンの凹状部全部とが嵌合するとともに、前記第１分割ケースに装着された側のパッキンの凹状部全部と、前記第２分割ケースに装着された側のパッキンの凸状部全部とが嵌合して、前記分割ケース内部を密封していることを特徴としている。
この特徴によれば、同一の形状に形成された一対のパッキンを、第１分割ケースに装着された側のパッキンの凸状部全部と、第２分割ケースに装着された側のパッキンの凹状部全部とを嵌合するとともに、第１分割ケースに装着された側のパッキンの凹状部全部と、第２分割ケースに装着された側のパッキンの凸状部全部とを嵌合することにより、分割ケース内部を密封できるため、一対のパッキンの凸状部と凹状部とを間違えることなく嵌合でき、凸状パッキンを装着された分割ケース同士を間違って重着したり、あるいは凹状パッキンが装着された分割ケース同士を間違って重着したりするといった問題を解消できる。また、複数の同一形状のパッキンを安価に製作でき、且つ製作しやすい。 In order to solve the above problems, the pair of packings according to claim 1 of the present invention are respectively mounted along the opposing surfaces of the divided case covering the periphery of the fluid pipe, and seal the inside of the divided case. A pair of packings,
Each packing mounted on the facing surface of the split case has the same shape with a convex portion protruding from the facing surface and a concave portion recessed in the opposite direction to the convex portion. ,
The split case includes a first split case and a second split case, and the convex shape of the packing on the side attached to the first split case and the concave shape of the packing on the side attached to the second split case. All the parts are fitted, and all the concave parts of the packing on the side attached to the first divided case and all the convex parts of the packing on the side attached to the second divided case are fitted. The interior of the divided case is sealed.
According to this feature, a pair of packings formed in the same shape are composed of all the convex portions of the packing attached to the first divided case and the concave portions of the packing attached to the second divided case. By fitting all together, and by fitting all the concave parts of the packing on the side attached to the first divided case and all the convex parts of the packing on the side attached to the second divided case, Since the inside of the case can be sealed, the convex and concave parts of a pair of packings can be fitted without making a mistake, and the split cases with the convex packings attached to each other by mistake or the concave packings are attached. You can solve the problem of accidentally wearing multiple divided cases. In addition, a plurality of packings having the same shape can be manufactured at low cost and are easy to manufacture.

本発明の請求項２に記載の一対のパッキンは、請求項１に記載の一対のパッキンであって、前記分割ケースは、前記流体管の管軸を対称として両方側に、長手方向に沿って対向面を有しており、該対向面に装着される夫々の前記パッキンは、
前記管軸を対称とする一方側に、長手方向に所定長さを有する一つの凸状部と、該一つの凸状部と略同じ長さを有する一つの凹状部とが、連続して形成されているとともに、
前記管軸を対称とする他方側に、前記一つの凸状部に管軸対称の凹状部と、前記一つの凹状部に管軸対称の凸状部とが、長手方向に連続して形成されていることを特徴としている。
この特徴によれば、パッキンの凸状部と凹状部を、管軸対称となるように管軸の各方側に一つずつ形成することで、凸状部と凹状部の形成箇所を最小限に抑えるとともに、シンプルに配置できる。特に、一方の分割ケースを間違えて長手方向に前後しても、この一方の分割ケースに装着されたパッキンと、他方の分割ケースに装着されたパッキンとが所定に凹凸嵌合できる。 The pair of packings according to claim 2 of the present invention are the pair of packings according to claim 1, wherein the split case is symmetrical with respect to the tube axis of the fluid pipe and is on both sides along the longitudinal direction. Each of the packings that have an opposing surface and are attached to the opposing surface,
One convex portion having a predetermined length in the longitudinal direction and one concave portion having substantially the same length as the one convex portion are continuously formed on one side symmetric with respect to the tube axis. As well as
On the other side symmetric with respect to the tube axis, a concave portion that is symmetrical with the tube axis is formed on the one convex portion, and a convex portion that is symmetrical with the tube axis is formed on the one concave portion continuously in the longitudinal direction. It is characterized by having.
According to this feature, the convex portion and the concave portion of the packing are formed one by one on each side of the tube axis so as to be symmetric with respect to the tube axis, thereby minimizing the location where the convex portion and the concave portion are formed. And can be arranged simply. In particular, even if one divided case is mistakenly moved back and forth in the longitudinal direction, the packing attached to the one divided case and the packing attached to the other divided case can be fitted in a predetermined uneven manner.

本発明の請求項３に記載の一対のパッキンは、請求項１または２に記載の一対のパッキンであって、夫々の前記パッキンは、
前記凸状部に、該凸状部と連続する前記凹状部との至端に向かって、その突出度合いが漸減するテーパ凸部が形成され、
前記凹状部に、該凹状部と連続する前記凸状部との至端に向かって、その窪み度合いが漸減するテーパ凹部が形成されていることを特徴としている。
この特徴によれば、一方のパッキンに形成されたテーパ凸部及びテーパ凹部と、他方のパッキンのテーパ凹部及びテーパ凸部とを、互いに嵌合することにより、凸状部と凹状部との至端近辺においても、一対のパッキンがずれることなく位置決めされ、容易に密封することができる。 The pair of packings according to claim 3 of the present invention are the pair of packings according to claim 1 or 2, wherein each of the packings is
In the convex portion, a tapered convex portion is formed in which the degree of protrusion gradually decreases toward the end of the concave portion continuous with the convex portion,
The concave portion is characterized in that a tapered concave portion is formed in which the degree of depression gradually decreases toward the end of the convex portion continuous with the concave portion.
According to this feature, the taper convex portion and the taper concave portion formed in one packing and the taper concave portion and the taper convex portion of the other packing are fitted to each other, so that the convex portion and the concave portion are brought together. Even in the vicinity of the ends, the pair of packings are positioned without shifting and can be easily sealed.

本発明の請求項４に記載の一対のパッキンは、請求項１ないし３のいずれかに記載の一対のパッキンであって、夫々の前記パッキンは弾性を有しているとともに、前記凸状部の断面積が、該凸状部と嵌合する前記凹状部の略同一断面で斬った断面積よりも大きく形成されていることを特徴としている。
この特徴によれば、凹状部より大きな断面積で形成された凸状部が、弾性により変形して凹状部に嵌合されるため、密封性を十分に確保できる。 A pair of packings according to a fourth aspect of the present invention is the pair of packings according to any one of the first to third aspects, wherein each of the packings has elasticity and the convex portion The cross-sectional area is formed to be larger than the cross-sectional area cut by substantially the same cross section of the concave portion fitted to the convex portion.
According to this feature, since the convex portion formed with a larger cross-sectional area than the concave portion is deformed by elasticity and fitted into the concave portion, sufficient sealing performance can be secured.

本発明に係るパッキンを実施するための最良の形態を実施例に基づいて以下に説明する。 The best mode for carrying out the packing according to the present invention will be described below based on examples.

本発明の実施例を図面に基づいて説明すると、先ず図１は、実施例１における流体管に設置された分割ケースの全体像を示す斜視図である。図２は、流体管に設置された分割ケースの一部破断正面図である。図３は、流体管に設置された分割ケースの側面図である。図４（ａ）は、第１分割ケースの対向面を示す平面図であり、（ｂ）は、第２分割ケースの対向面を示す平面図である。図５は、パッキンの平面図である。図６（ａ）は、図５のＣ−Ｃ方向視の断面図であり、（ｂ）は、図５のＤ−Ｄ方向視の断面図である。図７（ａ）は、図５のＥ−Ｅ間を示す斜視図であり、（ｂ）は、図５のＥ−Ｅ方向視の側面図である。図８は、図５のＦ−Ｆ方向視の正面図である。図９（ａ）は、密封前のフランジ間を示す分割ケースの一部拡大側断面図であり、（ｂ）は、（ａ）と同じく密封後の一部拡大側断面図である。図１０は、実施例２におけるパッキンの平面図である。図１１は、変形例１におけるパッキンの平面図である。図１２は、変形例２におけるフランジ間を示す分割ケースの一部拡大側断面図である。 An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view showing an overall image of a divided case installed in a fluid pipe in the first embodiment. FIG. 2 is a partially cutaway front view of the split case installed in the fluid pipe. FIG. 3 is a side view of the split case installed in the fluid pipe. FIG. 4A is a plan view showing the facing surface of the first split case, and FIG. 4B is a plan view showing the facing surface of the second split case. FIG. 5 is a plan view of the packing. 6A is a cross-sectional view taken along the line CC in FIG. 5, and FIG. 6B is a cross-sectional view taken along the line DD in FIG. Fig.7 (a) is a perspective view which shows between EE of FIG. 5, (b) is a side view of the EE direction view of FIG. FIG. 8 is a front view of the FF direction of FIG. FIG. 9A is a partially enlarged side sectional view of the split case showing between the flanges before sealing, and FIG. 9B is a partially enlarged side sectional view after sealing similarly to FIG. FIG. 10 is a plan view of the packing in the second embodiment. FIG. 11 is a plan view of the packing in the first modification. FIG. 12 is a partially enlarged side cross-sectional view of a split case showing between flanges in Modification 2.

図１ないし図３に示されるように、分割ケース１は、径方向に２分割可能な第１分割ケース１ａと第２分割ケース１ｂとから構成されており、流体管２の外面と分割ケース１の内面との間に所定の空間を形成するとともに、この空間内の水密性を保持して、流体管２の外周面に装着されている。また流体管２は、ダクタイル鋳鉄管や鋼管若しくは軟質合成樹脂管などからなる。 As shown in FIGS. 1 to 3, the split case 1 includes a first split case 1 a and a second split case 1 b that can be split into two in the radial direction, and the outer surface of the fluid pipe 2 and the split case 1. A predetermined space is formed between the inner surface of the fluid pipe 2 and the outer periphery of the fluid pipe 2 is mounted while maintaining water tightness in the space. The fluid pipe 2 is made of a ductile cast iron pipe, a steel pipe, a soft synthetic resin pipe, or the like.

第１分割ケース１ａは、長手方向の両端部に備えられた流体管２と当接する第１端部３ａと、同じく第２分割ケース１ｂとの当接する第１分割ケース１ａの側方に形成された第１フランジ５ａと、第１分割ケース１ａ外面に周設されたリブ４ａとを備えている。同様に、第２分割ケース１ｂは、長手方向の両端部に備えられた第２端部３ｂと、第１分割ケース１ａと当接する第２フランジ５ｂと、リブ４ｂとを備えている。 The first split case 1a is formed on the side of the first end case 3a that contacts the fluid pipe 2 provided at both ends in the longitudinal direction and the first end case 1a that contacts the second split case 1b. The first flange 5a and the rib 4a provided around the outer surface of the first divided case 1a are provided. Similarly, the 2nd division | segmentation case 1b is provided with the 2nd end part 3b provided in the both ends of the longitudinal direction, the 2nd flange 5b contact | abutted with the 1st division | segmentation case 1a, and the rib 4b.

第１フランジ５ａ、第２フランジ５ｂそれぞれには、対向する箇所に複数のボルト溝及びボルト孔が設けられ、流体管２が固定されるよう、このボルト溝及びボルト孔にＴ頭ボルト・ナット６が取付けられる。 Each of the first flange 5a and the second flange 5b is provided with a plurality of bolt grooves and bolt holes at opposite positions, and a T-head bolt and nut 6 is provided in the bolt grooves and bolt holes so that the fluid pipe 2 is fixed. Is installed.

また、分割ケース１における上下流両側の夫々において、流体管２の外周に固定された支持具１２は、第１支持具１２ａと第２支持具１２ｂの一対からなり、第１分割ケース１ａ、第２分割ケース１ｂに夫々突設された第１係合部４ｃ、第２係合部４ｄに、第１支持具１２ａの鉤部１２ｃと第２支持具１２ｂの鉤部１２ｄがそれぞれ係合されるとともに、第１支持具１２ａと第２支持具１２ｂがボルト・ナット７で締結されることにより、支持具１２が流体管２に周方向に固定されており、流体管２に所定に取付けられた分割ケース１が、流体管２内の水流から発生した圧力等により、流体管２からずれる問題を防止している。 Further, the support tool 12 fixed to the outer periphery of the fluid pipe 2 on each of the upstream and downstream sides of the split case 1 is composed of a pair of a first support tool 12a and a second support tool 12b. The flange portion 12c of the first support member 12a and the flange portion 12d of the second support member 12b are respectively engaged with the first engagement portion 4c and the second engagement portion 4d that protrude from the two-divided case 1b. At the same time, the first support tool 12a and the second support tool 12b are fastened with bolts and nuts 7, so that the support tool 12 is fixed to the fluid pipe 2 in the circumferential direction, and is attached to the fluid pipe 2 in a predetermined manner. The split case 1 prevents the problem of being displaced from the fluid pipe 2 due to the pressure generated from the water flow in the fluid pipe 2.

図２に示されるように、流体管２は、挿口である第１流体管２ａと、この第１流体管２ａの端部を挿入した受口である第２流体管２ｂとから構成されており、この第１流体管２ａと第２流体管２ｂとの挿入箇所を、分割ケース１により後述のように水密に被覆している。尚、分割ケースは、必ずしも本実施例のように挿口と受口との挿入箇所を被覆しているものに限られず、例えば、流体管の端部を除いた中間部を被覆しているものであってもよい。 As shown in FIG. 2, the fluid pipe 2 is composed of a first fluid pipe 2a that is an insertion port and a second fluid pipe 2b that is a receiving port into which an end of the first fluid pipe 2a is inserted. And the insertion location of this 1st fluid pipe | tube 2a and the 2nd fluid pipe | tube 2b is watertightly coat | covered by the division | segmentation case 1 as mentioned later. Note that the split case is not necessarily limited to the case where the insertion portion of the insertion port and the reception port is covered as in this embodiment, for example, the case where the intermediate portion excluding the end of the fluid pipe is covered. It may be.

前記した挿入箇所において第１流体管２ａの外周面に取付けられた押輪８は、押輪本体８ａと押しねじ８ｂと係止部材８ｃとからなる。係止部材８ｃは、押輪本体８ａの内周面に形成された溝部８ｅに嵌合されるよう取り付けられるとともに、係止部材８ｃの先端爪８ｇが第１流体管２ａの外周面に向かって圧接するよう押しねじ８ｂによって押圧されることで、押輪８は、第１流体管２ａに対し固定に取付けられている。また、図示しない締結ボルトが、押輪本体８ａと第２流体管２ｂの端部とを管軸方向に締結していることで、押輪８は、第２流体管２ｂに対し固定に取付けられている。このようにすることで、押輪本体８ａの周方向に延びた挿入部８ｆが、第２流体管２ｂの端部内周面に嵌挿された可撓性材質のシール部材９を長手方向に支持している。 The pusher wheel 8 attached to the outer peripheral surface of the first fluid pipe 2a at the above-described insertion location includes a pusher wheel body 8a, a push screw 8b, and a locking member 8c. The locking member 8c is attached so as to be fitted in a groove 8e formed on the inner peripheral surface of the presser wheel body 8a, and the tip claw 8g of the locking member 8c is pressed against the outer peripheral surface of the first fluid pipe 2a. The pusher wheel 8 is fixedly attached to the first fluid pipe 2a by being pushed by the push screw 8b. In addition, a fastening bolt (not shown) fastens the presser wheel 8 to the second fluid pipe 2b by fastening the presser wheel body 8a and the end of the second fluid pipe 2b in the tube axis direction. . By doing so, the insertion portion 8f extending in the circumferential direction of the pusher wheel body 8a supports the flexible sealing member 9 inserted in the inner peripheral surface of the end portion of the second fluid pipe 2b in the longitudinal direction. ing.

図４（ａ）に示されるように、第１分割ケース１ａのパッキン溝１３は、第１分割ケース１ａにおける第２分割ケース１ｂとの対向面に、平面視周方向に亘って設けられ、このパッキン溝１３に沿って、後述するパッキン１１（図５参照）が嵌入されるように成っている。同様に、図４（ｂ）に示されるように、第２分割ケース１ｂのパッキン溝１３’は、第２分割ケース１ｂにおける第１分割ケース１ａとの対向面に、平面視周方向に亘って設けられ、このパッキン溝１３’に沿って第１分割ケース１ａに装着されるパッキン１１と同じ構造のパッキン１１が嵌入されるように成っている。流体管２が第１分割ケース１ａと第２分割ケース１ｂとにより被覆されると、第１分割ケース１ａに装着されたパッキン１１と、該パッキン１１と同一形状の第２分割ケース１ｂに装着されたパッキン１１とが、一対で当接されることにより分割ケース１に囲まれた空間に水密性が確保される。 As shown in FIG. 4 (a), the packing groove 13 of the first divided case 1a is provided on the surface facing the second divided case 1b in the first divided case 1a over the circumferential direction in the plan view. A packing 11 (see FIG. 5), which will be described later, is inserted along the packing groove 13. Similarly, as shown in FIG. 4B, the packing groove 13 ′ of the second divided case 1 b extends on the surface facing the first divided case 1 a in the second divided case 1 b over the circumferential direction in plan view. The packing 11 having the same structure as that of the packing 11 provided in the first divided case 1a is provided along the packing groove 13 '. When the fluid pipe 2 is covered by the first divided case 1a and the second divided case 1b, the packing 11 attached to the first divided case 1a and the second divided case 1b having the same shape as the packing 11 are attached. Water tightness is ensured in the space surrounded by the divided case 1 by contacting the packing 11 with a pair.

図５に示されるように、パッキン１１は、弾性を有する可撓性材料であるゴムで構成されており、その形状は次のように無端状に形成されている。即ち、分割ケース１の組付けの際に流体管２の管軸に整合させるパッキン中心線Ａ−Ａ線を対称とする一方側（図示左側）に、長手方向に所定長さを有する一つの凸状部１５を構成する凸状体１１ａと、前記一つの凸状部１５と略同じ長さを有する一つの凹状部１６’を構成する凹状体１１ｂ’とが、長手方向に連続して形成されているとともに、Ａ−Ａ線を対称とする他方側（図示右側）に、凹状部１６を構成する凹状体１１ｂと、凸状部１５’を構成する凸状体１１ａ’ とが、長手方向に連続して形成されている。そして、流体管２の外径と略同径の内径を有し流体管２の外周面と当接する弧状体１１ｃが、その両端側に凸状体１１ａ及び凹状体１１ｂを配して連続しているとともに、弧状体１１ｃの対向側に位置する弧状体１１ｃ’が、その両端側に凸状体１１ａ’及び凹状体１１ｂ’を配して連続しており、パッキン１１全体として無端状に形成されている。 As FIG. 5 shows, the packing 11 is comprised with the rubber | gum which is a flexible material which has elasticity, The shape is formed in the endless form as follows. That is, one projection having a predetermined length in the longitudinal direction is provided on one side (the left side in the drawing) symmetrical with respect to the packing center line AA to be aligned with the pipe axis of the fluid pipe 2 when the divided case 1 is assembled. Convex body 11a that constitutes the convex portion 15 and concave body 11b 'that constitutes one concave portion 16' having substantially the same length as the one convex portion 15 are formed continuously in the longitudinal direction. In addition, on the other side (right side in the figure) symmetric with respect to the line AA, a concave body 11b constituting the concave portion 16 and a convex body 11a ′ constituting the convex portion 15 ′ are provided in the longitudinal direction. It is formed continuously. An arcuate body 11c having an inner diameter substantially the same as the outer diameter of the fluid pipe 2 and abutting on the outer peripheral surface of the fluid pipe 2 is provided with a convex body 11a and a concave body 11b on both ends thereof, and continuously. In addition, an arcuate body 11c ′ located on the opposite side of the arcuate body 11c is continuous with a convex body 11a ′ and a concave body 11b ′ disposed on both ends thereof, and the packing 11 as a whole is formed endlessly. ing.

ここで凸状体１１ａと１１ａ’、凹状体１１ｂと１１ｂ’、弧状体１１ｃと１１ｃ’は、それぞれ同一形状、即ち同一断面を成し、Ａ−Ａ線を対称として、凸状体１１ａに対して凹状体１１ｂが形成され、凹状体１１ｂ’に対して凸状体１１ａ’が形成されるとともに、長手方向の略中央位置でＡ−Ａ線と直交する直交線Ｂ−Ｂ線を対称として、凸状体１１ａに対して凹状体１１ｂ’が形成され、凹状体１１ｂに対して凸状体１１ａ’が形成されている。尚、上述した形状のパッキン１１は、単一のモールドで成型された一体構造となっている。 Here, the convex bodies 11a and 11a ′, the concave bodies 11b and 11b ′, and the arc bodies 11c and 11c ′ have the same shape, that is, the same cross section, and the AA line is symmetrical with respect to the convex body 11a. The concave body 11b is formed, the convex body 11a ′ is formed with respect to the concave body 11b ′, and the orthogonal line BB line orthogonal to the AA line is symmetric at the substantially central position in the longitudinal direction. A concave body 11b ′ is formed with respect to the convex body 11a, and a convex body 11a ′ is formed with respect to the concave body 11b. The packing 11 having the above-described shape has an integral structure formed by a single mold.

図６（ａ）に示されるように、凸状体１１ａの断面形状について説明すると、凸状体１１ａの上部には、上方に突出した、即ちパッキン１１が装着される分割ケースの対向面より突出した凸状部１５が長手方向に形成されている。また図６（ｂ）に示されるように、凹状体１１ｂの断面形状について説明すると、凹状体１１ｂの上部には、下方に窪んだ、即ち凸状部１５と反対方向に窪んだ凹状部１６が長手方向に形成されている。 As shown in FIG. 6A, the cross-sectional shape of the convex body 11a will be described. The upper part of the convex body 11a protrudes upward, that is, protrudes from the opposing surface of the split case to which the packing 11 is mounted. The raised convex portion 15 is formed in the longitudinal direction. Further, as shown in FIG. 6B, the cross-sectional shape of the concave body 11b will be described. On the upper part of the concave body 11b, there is a concave section 16 that is recessed downward, that is, recessed in the opposite direction to the convex section 15. It is formed in the longitudinal direction.

また凸状部１５の断面積が、凸状部１５と嵌合する凹状部１６の略同一断面で斬った断面積よりも大きく形成されている。このようにすることで、凹状部１６より大きな断面積で形成された凸状部１５が、凹状部１６に弾性により変形して嵌合するので、分割ケース１内部の密封性を十分に確保することができる（図９（ａ）、（ｂ）参照）。尚、特に図示しないが、凸状体１１ａ’の端面を視た図５のＣ’−Ｃ’方向視図は、図６（ａ）に示された図と同じであり、同様に、凹状体１１ｂ’の断面を視た図５のＤ’−Ｄ’方向視図は、図６（ｂ）に示された図と同じである。 Further, the cross-sectional area of the convex portion 15 is formed larger than the cross-sectional area cut by the substantially same cross section of the concave portion 16 fitted to the convex portion 15. By doing in this way, since the convex-shaped part 15 formed with the larger cross-sectional area than the concave-shaped part 16 deform | transforms and fits into the concave-shaped part 16 by elasticity, the sealing performance inside division | segmentation case 1 is fully ensured. (See FIGS. 9A and 9B). Although not shown in particular, the C′-C ′ direction view of FIG. 5 as viewed from the end face of the convex body 11a ′ is the same as the view shown in FIG. The D′-D ′ direction view of FIG. 5 as seen from the cross section of 11b ′ is the same as the view shown in FIG.

図７（ａ）、（ｂ）に示されるように、凸状体１１ａと凹状体１１ｂ’とが長手方向に遷移する箇所を至端Ｒとして、以下に説明すると、凸状部１５における至端Ｒの近辺には、凸状部１５と連続する凹状部１６との至端Ｒに向かって、その突出度合いが漸減するテーパ凸部Ｓが形成され、凹状部１６における至端Ｒの近辺には、凹状部１６と連続する凸状部１５との至端Ｒに向かって、その窪み度合いが漸減するテーパ凹部Ｔが形成されており、至端Ｒを介して、長手方向に連続的に凸状部１５と凹状部１６とが形成されている。この特徴により、第１分割ケース１ａ側に装着されたパッキン１１におけるテーパ凸部Ｓ及びテーパ凹部Ｔと、第２分割ケース１ｂ側に装着されたパッキン１１におけるテーパ凹部Ｔ及びテーパ凸部Ｓとを、互いに嵌合することにより、至端Ｒの近辺においても、一対のパッキン１１、１１がずれることなく位置決めされ、容易に密封することができる。尚、特に図示しないが、図５のＥ’−Ｅ’間を示す斜視図は、図７（ａ）に示された図と同じであり、同様に、図５のＥ’−Ｅ’方向視図は、図７（ｂ）に示された図と同じである。 As shown in FIGS. 7A and 7B, a point where the convex body 11a and the concave body 11b ′ transition in the longitudinal direction is defined as an extreme end R. In the vicinity of R, a taper convex portion S whose degree of protrusion gradually decreases toward the end R of the concave portion 16 that is continuous with the convex portion 15, and in the vicinity of the end R of the concave portion 16. A tapered recess T is formed in which the degree of depression gradually decreases toward the extreme end R of the concave portion 16 and the continuous convex portion 15, and the convex shape is continuously convex in the longitudinal direction via the extreme end R. A portion 15 and a concave portion 16 are formed. Due to this feature, the taper convex portion S and the taper concave portion T in the packing 11 mounted on the first divided case 1a side, and the taper concave portion T and the taper convex portion S in the packing 11 mounted on the second divided case 1b side are provided. By fitting each other, the pair of packings 11 and 11 can be positioned without deviation even in the vicinity of the extreme end R and can be easily sealed. Although not shown in particular, the perspective view showing the section between E ′ and E ′ in FIG. 5 is the same as the view shown in FIG. 7A. Similarly, the perspective view in the direction E ′ and E ′ in FIG. The figure is the same as the figure shown in FIG.

図８に示されるように、弧状体１１ｃについて説明すると、弧状体１１ｃの内周部は、分割ケース１と流体管２の水密性が確保されるように、流体管２の外周面と周方向に当接する流体管２の外径と略同径の円弧部１７で形成されている。尚、特に図示しないが、弧状体１１ｃ’を視た図５のＦ’−Ｆ’方向視図は、図８に示された図と同じである。 As shown in FIG. 8, the arc-shaped body 11 c will be described. The inner peripheral portion of the arc-shaped body 11 c is aligned with the outer peripheral surface of the fluid pipe 2 and the circumferential direction so that the watertightness of the divided case 1 and the fluid pipe 2 is ensured. Is formed by an arc portion 17 having substantially the same diameter as the outer diameter of the fluid pipe 2 in contact with the fluid pipe 2. Although not shown in particular, the F′-F ′ direction view of FIG. 5 when viewing the arcuate body 11c ′ is the same as the view shown in FIG.

パッキン１１は上記に示した構造であるため、図９（ａ）、（ｂ）に示されるように、第１フランジ５ａと第２フランジ５ｂとをＴ頭ボルト・ナット６で締結することにより、第１分割ケース１ａに装着された側のパッキン１１の凸状部全部（１５、１５’）と、第２分割ケース１ｂに装着された側のパッキン１１の凹状部全部（１６、１６’）とが対向し嵌合するとともに、第１分割ケース１ａに装着された側のパッキン１１の凹状部全部（１６、１６’）と、第２分割ケース１ｂに装着された側のパッキン１１の凸状部全部（１５、１５’）とが対向し嵌合する。同時に、第１分割ケース１ａに装着された側のパッキン１１の弧状体１１ｃ、１１ｃ’と、第２分割ケース１ｂに装着された側のパッキン１１の弧状体１１ｃ’、１１ｃとが、流体管２の外周面と当接することにより、分割ケース１内部を密封する。 Since the packing 11 has the structure described above, as shown in FIGS. 9A and 9B, by fastening the first flange 5a and the second flange 5b with the T-head bolt and nut 6, All convex portions (15, 15 ') of the packing 11 on the side attached to the first divided case 1a, and all concave portions (16, 16') of the packing 11 on the side attached to the second divided case 1b Are opposed to each other, and all the concave portions (16, 16 ') of the packing 11 on the side attached to the first divided case 1a and the convex portion of the packing 11 on the side attached to the second divided case 1b All (15, 15 ') face and fit. At the same time, the arcuate bodies 11c and 11c ′ of the packing 11 on the side attached to the first divided case 1a and the arcuate bodies 11c ′ and 11c of the packing 11 on the side attached to the second divided case 1b are connected to the fluid pipe 2. The inside of the divided case 1 is sealed by abutting on the outer peripheral surface.

このようにすることで、同一の形状に形成された一対のパッキン１１、１１を、第１分割ケース１ａに装着された側のパッキン１１の凸状部全部（１５、１５’）と、第２分割ケース１ｂに装着された側のパッキン１１の凹状部全部（１６、１６’）とを嵌合するとともに、第１分割ケース１ａに装着された側のパッキン１１の凹状部全部（１６、１６’）と、第２分割ケース１ｂに装着された側のパッキン１１の凸状部全部（１５、１５’）とを嵌合することにより、分割ケース１内部を密封できるため、一対のパッキン１１、１１の凸状部１５、１５’と凹状部１６、１６’とを間違えることなく嵌合でき、凸状パッキンを装着された分割ケース同士を間違って重着したり、あるいは凹状パッキンが装着された分割ケース同士を間違って重着したりするといった問題を解消できる。また、複数の同一形状のパッキン１１を単一のモールドで安価に製作でき、且つ製作しやすい。 By doing in this way, a pair of packings 11 and 11 formed in the same shape are made into the whole convex part (15, 15 ') of the packing 11 of the side attached to the 1st division | segmentation case 1a, and 2nd. All the concave portions (16, 16 ') of the packing 11 on the side attached to the split case 1b are fitted together, and all the concave portions (16, 16' of the packing 11 on the side attached to the first split case 1a are fitted. ) And all the convex portions (15, 15 ′) of the packing 11 on the side attached to the second divided case 1b, the inside of the divided case 1 can be sealed, so that the pair of packings 11, 11 The convex portions 15, 15 'and the concave portions 16, 16' can be fitted without making a mistake, and the divided cases fitted with the convex packing are mistakenly attached to each other, or the divided cases where the concave packing is attached. Cases are wrong The problem of or wear can be eliminated. In addition, a plurality of packings 11 having the same shape can be manufactured at a low cost with a single mold and are easy to manufacture.

また、本実施例においては、パッキン１１の凸状部１５、１５’と凹状部１６、１６’を、管軸対称となるように管軸の各方側に一つずつ形成することで、凸状部１５、１５’と凹状部１６、１６’の形成箇所を最小限に抑えるとともに、シンプルに配置できる。特に、いずれか一方の分割ケースを間違えて長手方向に前後しても、この一方の分割ケースに装着されたパッキン１１の凸状部１５、１５’及び凹状部１６、１６’と、他方の分割ケースに装着されたパッキン１１の凹状部１６’、１６及び凸状部１５’、１５とが、所定に対向して凹凸嵌合できる。 Further, in this embodiment, the convex portions 15, 15 ′ and the concave portions 16, 16 ′ of the packing 11 are formed one by one on each side of the tube axis so as to be symmetric with respect to the tube axis. In addition to minimizing the formation portions of the concave portions 15 and 15 'and the concave portions 16 and 16', they can be arranged simply. In particular, even if one of the divided cases is mistakenly moved back and forth in the longitudinal direction, the convex portions 15 and 15 'and the concave portions 16 and 16' of the packing 11 attached to the one divided case and the other divided case. The concave portions 16 ′ and 16 and the convex portions 15 ′ and 15 of the packing 11 attached to the case can be concavo-convexly fitted to face each other.

次に実施例２に係るパッキンについて説明する。尚、前記実施例に示される構成部分と同一構成部分に付いては同一符号を付して重複する説明を省略する。 Next, the packing according to the second embodiment will be described. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted.

図１０に示されるように、実施例２のパッキン２１は、前記実施例１で示したパッキン１１の形態と構造上ほぼ同様であるが、管軸と整合させるパッキン中心線Ａ−Ａ線を境に、一方側（図示左側）を凸状部２５を有する凸状体２１ａのみが形成され、他方側（図示右側）に凹状部２６を有する凹状体２１ｂのみが形成される。このようにすることで、上記した実施例１と同様に、一対のパッキン２１、２１の凸状部２５と凹状部２６とを間違えることなく嵌合でき、凸状パッキンを装着された分割ケース同士を間違って重着したり、あるいは凹状パッキンが装着された分割ケース同士を間違って重着したりするといった問題を解消できる。また、複数の同一形状のパッキン２１を単一のモールドで安価に製作でき、且つ製作しやすい。 As shown in FIG. 10, the packing 21 of the second embodiment is substantially the same in structure and structure as the packing 11 shown in the first embodiment, but the packing center line A-A aligned with the tube axis is a boundary. In addition, only the convex body 21a having the convex portion 25 is formed on one side (the left side in the drawing), and only the concave body 21b having the concave portion 26 is formed on the other side (the right side in the drawing). By doing in this way, like the above-mentioned Example 1, it can fit without making a mistake with the convex part 25 and the concave part 26 of a pair of packings 21 and 21, and the division | segmentation cases with which convex packing was mounted | worn with each other It is possible to solve problems such as accidentally putting on or attaching the divided cases to which the concave packing is attached. In addition, a plurality of packings 21 having the same shape can be manufactured at low cost with a single mold and are easy to manufacture.

以上、本発明の実施例を図面により説明してきたが、具体的な構成はこれら実施例に限られるものではなく、本発明の要旨を逸脱しない範囲における変更や追加があっても本発明に含まれる。 Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

例えば変形例１として、図１１に示されるように、パッキン３１は、パッキン中心線Ａ−Ａ線を境に、一方側（図示左側）において順に凸状部３５、凹状部３６’、凸状部３５”が連続するように、凸状体３１ａ、凹状体３１ｂ’、凸状体３１ａ”が長手方向に連続して形成されているとともに、他方側において順に凹状部３６、凸状部３５’、凹状部３６”が連続するように、凹状体３１ｂ、凸状体３１ａ’、凹状体３１ｂ”が長手方向に連続して形成されている。 For example, as a first modification, as shown in FIG. 11, the packing 31 includes a convex portion 35, a concave portion 36 ′, and a convex portion in order on one side (the left side in the figure) with respect to the packing center line AA. The convex body 31a, the concave body 31b ′, and the convex body 31a ″ are formed continuously in the longitudinal direction so that 35 ″ is continuous, and the concave portion 36, the convex portion 35 ′, The concave body 31b, the convex body 31a ′, and the concave body 31b ″ are continuously formed in the longitudinal direction so that the concave portion 36 ″ is continuous.

上記した形状の一対のパッキン３１、３１を装着した分割ケース同士を対向しても、一方のパッキン３１の凸状部全部（３５、３５’、３５”）と他方のパッキン３１の凹状部全部（３６、３６’、３６”）とが嵌合するとともに、一方のパッキン３１の凹状部全部（３６、３６’、３６”）と他方のパッキン３１の凸状部全部（３５、３５’、３５”）とが嵌合して、前記分割ケース内部を密封する。このように、分割ケース内の空間を密閉するものであれば、Ａ−Ａ線を境に、一方側及び他方側に凸状部、凹状部がともに複数あってもよい。 Even if the divided cases equipped with the pair of packings 31 and 31 having the above-described shapes are opposed to each other, all the convex portions of one packing 31 (35, 35 ', 35 ") and all the concave portions of the other packing 31 ( 36, 36 ′, 36 ″) are fitted together, and all the concave portions (36, 36 ′, 36 ″) of one packing 31 and all the convex portions (35, 35 ′, 35 ″) of the other packing 31 are fitted. And the inside of the divided case is sealed. As described above, as long as the space in the divided case is sealed, a plurality of convex portions and concave portions may be provided on one side and the other side with respect to the line AA.

また変形例２として、図１２に示されるように、パッキン４１は、凸状部４５と凹状部４６とが隣接して配置され長手方向に平行に形成されている。このような形状の一対のパッキン４１、４１を装着した分割ケース同士を対向しても、一方のパッキン４１の凸状部４５全部と他方のパッキン４１の凹状部４６全部とが嵌合するとともに、一方のパッキン４１の凹状部４６全部と他方のパッキン４１の凸状部４５全部とが嵌合して、前記分割ケース内部を密封する。このように、分割ケース内の空間を密閉するものであれば、凸状部と凸状部とが隣接して配置され長手方向に平行に形成されているものでもよい。 As a second modification, as shown in FIG. 12, the packing 41 has a convex portion 45 and a concave portion 46 arranged adjacent to each other and formed in parallel to the longitudinal direction. Even if the split cases with the pair of packings 41 and 41 having such shapes are opposed to each other, all the convex portions 45 of one packing 41 and all the concave portions 46 of the other packing 41 are fitted, All the concave portions 46 of one packing 41 and all the convex portions 45 of the other packing 41 are fitted to seal the inside of the divided case. As described above, as long as the space in the divided case is sealed, the convex portion and the convex portion may be arranged adjacent to each other and formed parallel to the longitudinal direction.

実施例１における流体管に設置された分割ケースの全体像を示す斜視図である。FIG. 3 is a perspective view showing an overall image of a divided case installed in a fluid pipe in Example 1. 流体管に設置された分割ケースの一部破断正面図である。It is a partially broken front view of the division | segmentation case installed in the fluid pipe | tube. 流体管に設置された分割ケースの側面図である。It is a side view of the division | segmentation case installed in the fluid pipe | tube. （ａ）は、第１分割ケースの対向面を示す平面図であり、（ｂ）は、第２分割ケースの対向面を示す平面図である。(A) is a top view which shows the opposing surface of a 1st division | segmentation case, (b) is a top view which shows the opposing surface of a 2nd division | segmentation case. パッキンの平面図である。It is a top view of packing. （ａ）は、図５のＣ−Ｃ方向視の断面図であり、（ｂ）は、図５のＤ−Ｄ方向視の断面図である。(A) is sectional drawing of CC view of FIG. 5, (b) is sectional drawing of DD direction view of FIG. （ａ）は、図５のＥ−Ｅ間を示す斜視図であり、（ｂ）は、図５のＥ−Ｅ方向視の側面図である。(A) is a perspective view which shows between EE of FIG. 5, (b) is a side view of the EE direction view of FIG. 図５のＦ−Ｆ方向視の正面図である。It is a front view of the FF direction view of FIG. （ａ）は、密封前のフランジ間を示す分割ケースの一部拡大側断面図であり、（ｂ）は、（ａ）と同じく密封後の一部拡大側断面図である。(A) is a partial expanded side sectional view of the division | segmentation case which shows between the flanges before sealing, (b) is a partially expanded side sectional view after sealing similarly to (a). 実施例２におけるパッキンの平面図である。6 is a plan view of a packing in Example 2. FIG. 変形例１におけるパッキンの平面図である。FIG. 10 is a plan view of a packing in Modification 1. 変形例２におけるフランジ間を示す分割ケースの一部拡大側断面図である。It is a partially expanded side sectional view of the division case which shows between flanges in modification 2. 従来例における、（ａ）は分割ケースの正面図であり、（ｂ）は分割ケースの中央断面図であり、（ｃ）はパッキンの斜視図である。(A) in a prior art example is a front view of a division | segmentation case, (b) is a center sectional view of a division | segmentation case, (c) is a perspective view of packing.

Explanation of symbols

１分割ケース
１ａ第１分割ケース
１ｂ第２分割ケース
２流体管
２ａ第１流体管
２ｂ第２流体管
３ａ第１端部
３ｂ第２端部
４ａ第１リブ
４ｂ第２リブ
４ｃ第１係合部
４ｄ第２係合部
５ａ第１フランジ
５ｂ第２フランジ
６Ｔ頭ボルト・ナット
７ボルト・ナット
８押輪
８ａ押輪本体
８ｂ押しねじ
８ｃ係止部材
８ｅ溝部
８ｆ挿入部
８ｇ先端爪
９シール部材
１１パッキン
１１ａ、１１ａ’ 凸状体
１１ｂ、１１ｂ’ 凹状体
１１ｃ、１１ｃ’ 弧状体
１２支持具
１２ａ第１支持具
１２ｂ第２支持具
１２ｃ鉤部
１２ｄ鉤部
１３、１３’ パッキン溝
１５、１５’ 凸状部
１６、１６’ 凹状部
１７円弧部
２１パッキン
２１ａ凸状体
２１ｂ凹状体
２５凸状部
２６凹状部
３１パッキン
３１ａ、３１ａ’ 凸状体
３１ａ” 凸状体
３１ｂ、３１ｂ’ 凹状体
３１ｂ” 凹状体
３５、３５’、３５”凸状部
３６、３６’、３６”凸状部
４１パッキン
４５凸状部
４６凹状部
Ｒ至端
Ｓテーパ凸部
Ｔテーパ凹部 1 divided case 1a first divided case 1b second divided case 2 fluid pipe 2a first fluid pipe 2b second fluid pipe 3a first end 3b second end 4a first rib 4b second rib 4c first engaging portion 4d 2nd engagement part 5a 1st flange 5b 2nd flange 6 T head bolt and nut 7 Bolt and nut 8 Push ring 8a Push ring body 8b Push screw 8c Locking member 8e Groove part 8f Insertion part 8g Tip nail 9 Seal member 11 Packing 11a , 11a ′ Convex body 11b, 11b ′ Concave body 11c, 11c ′ Arc-shaped body 12 Support tool 12a First support tool 12b Second support tool 12c ridge part 12d ridge part 13, 13 ′ packing groove 15, 15 ′ convex part 16, 16 'Concave part 17 Arc part 21 Packing 21a Convex body 21b Concave body 25 Convex part 26 Concave part 31 Packing 31a, 31a' Convex body 31a "Convex body 31b, 31b 'Concave body 3 b "concave member 35, 35 ', 35" projecting portions 36, 36', 36 "protruding portion 41 packing 45 convex portion 46 concave portion R Itaru end S tapered protrusion T tapered recess

Claims

A pair of packings are respectively mounted along the opposing surfaces of the split case covering the periphery of the fluid pipe, and seal the inside of the split case,
Each packing mounted on the facing surface of the split case has the same shape with a convex portion protruding from the facing surface and a concave portion recessed in the opposite direction to the convex portion. ,
The split case includes a first split case and a second split case, and the convex shape of the packing on the side attached to the first split case and the concave shape of the packing on the side attached to the second split case. All the parts are fitted, and all the concave parts of the packing on the side attached to the first divided case and all the convex parts of the packing on the side attached to the second divided case are fitted. A pair of packings, wherein the inside of the divided case is sealed.

The split case has opposite surfaces along the longitudinal direction on both sides with the pipe axis of the fluid pipe being symmetrical, and each packing attached to the opposite surface is
One convex portion having a predetermined length in the longitudinal direction and one concave portion having substantially the same length as the one convex portion are continuously formed on one side symmetric with respect to the tube axis. As well as
On the other side symmetric with respect to the tube axis, a concave portion that is symmetrical with the tube axis is formed on the one convex portion, and a convex portion that is symmetrical with the tube axis is formed on the one concave portion continuously in the longitudinal direction. The pair of packings according to claim 1, wherein the pair of packings are provided.

Each said packing is
In the convex portion, a tapered convex portion is formed in which the degree of protrusion gradually decreases toward the end of the concave portion continuous with the convex portion,
3. The pair according to claim 1, wherein the concave portion is formed with a tapered concave portion in which a degree of the depression gradually decreases toward an end of the convex portion continuous with the concave portion. Packing.

Each of the packings has elasticity, and a cross-sectional area of the convex portion is formed larger than a cross-sectional area cut by substantially the same cross section of the concave portion fitted to the convex portion. A pair of packings according to any one of claims 1 to 3.