JP7026453B2 - rubber seal - Google Patents

rubber seal Download PDF

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JP7026453B2
JP7026453B2 JP2017099385A JP2017099385A JP7026453B2 JP 7026453 B2 JP7026453 B2 JP 7026453B2 JP 2017099385 A JP2017099385 A JP 2017099385A JP 2017099385 A JP2017099385 A JP 2017099385A JP 7026453 B2 JP7026453 B2 JP 7026453B2
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fall prevention
packing
portions
longitudinal direction
groove
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JP2018194113A (en
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友和 佐藤
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Apic Yamada Corp
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Yamada Manufacturing Co Ltd
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Description

本発明は、ポンプ,エンジン等の機器における密封性を要するハウジングで且つハウジング本体とカバー板との何れかに溝が設けられ、低い充填率でありながら溝からの脱落防止と倒れ防止ができ、耐久性及び信頼性に優れたパッキンに関する。 The present invention is a housing that requires hermeticity in equipment such as pumps and engines, and a groove is provided in either the housing body or the cover plate, so that it can be prevented from falling out of the groove and falling down even with a low filling rate. Regarding packing with excellent durability and reliability.

従来より、ポンプ,エンジン等の機器のハウジングを構成するハウジング本体とカバー板において、密封性を必要とする部分ではOリング,シール材等の密封材が多く使用されている。この密封材は、前記ハウジング本体やカバー板等の構成部材の接合面の間に装着するために、ハウジング本体又はカバー板の何れか一方に溝が形成されて、該溝に密封材が挿入配置される構造としたものである。 Conventionally, in the housing body and the cover plate that constitute the housing of equipment such as pumps and engines, sealing materials such as O-rings and sealing materials are often used in the parts that require sealing. In order to mount this sealing material between the joint surfaces of constituent members such as the housing body and the cover plate, a groove is formed in either the housing body or the cover plate, and the sealing material is inserted and arranged in the groove. It is a structure that is to be used.

溝に挿入配置された密封材は、ハウジング本体とカバー板とを組み付ける作業時や、或いは別の工場等への輸送中に、溝から簡単に外れたり、脱落しないようにする目的のために、密封材に突起が形成されたものが存在し、溝に嵌め込んだ状態で、密封材が溝から脱落しない構造としたものが存在する。このような技術として代表的なものが、下記特許文献1に開示され、ハウジング本体の組付け作業時において密封材が溝から脱落することによる作業の非効率性という問題点は解決されている。なお、特許文献1では、密封材はガスケットと称されており、以下、特許文献1の説明ではガスケットを使用する。 The sealing material inserted and placed in the groove is for the purpose of preventing it from easily coming off or falling off from the groove during the work of assembling the housing body and the cover plate or during transportation to another factory. There is a sealing material in which protrusions are formed, and there is a structure in which the sealing material does not fall out of the groove when it is fitted in the groove. A typical such technique is disclosed in Patent Document 1 below, and the problem of work inefficiency due to the sealing material falling off from the groove during the assembling work of the housing body is solved. In Patent Document 1, the sealing material is referred to as a gasket, and hereinafter, the gasket is used in the description of Patent Document 1.

特開2016-80167号公報Japanese Unexamined Patent Publication No. 2016-80167

ガスケットの機器への装着については、さらに別の問題点が存在する。この問題点とはガスケットの機器の組付け時において、溝にガスケットを装着する時に、溝に挿入配置されたガスケットの前記溝から突出する部分つまり、カバー板に密着する部分が、該カバー板にて押し付けられるときに、ガスケットの長手方向に直交する断面の頂部付近が内方又は外方に倒れてしまうこともある。 There is yet another problem with mounting gaskets on equipment. This problem is that when the gasket device is assembled, when the gasket is mounted in the groove, the portion of the gasket inserted and arranged in the groove protruding from the groove, that is, the portion in close contact with the cover plate is formed on the cover plate. When pressed against the gasket, the vicinity of the top of the cross section orthogonal to the longitudinal direction of the gasket may fall inward or outward.

そのために、ガスケットは密封性が損なわれるように変形してしまい所望の密封性能が得られないことも十分に有りうる。特許文献1では、このような問題点を解決するために、ガスケットが倒れるように形状変化するのを防止するために、ガスケット本体の幅方向両側にそれぞれ突設された倒れ防止用突起部と呼ばれる倒れを防止する突起を設けたことが記載されている。 Therefore, it is quite possible that the gasket is deformed so as to impair the sealing performance, and the desired sealing performance cannot be obtained. In Patent Document 1, in order to solve such a problem, in order to prevent the shape of the gasket from changing so as to fall, it is called a fall prevention protrusion provided on both sides of the gasket body in the width direction. It is stated that a protrusion is provided to prevent the fall.

特許文献1において、倒れ防止用突起部は、ガスケット本体の幅方向両側の同一箇所、或いは外周面にのみ又は内周面にのみに設けたり、外周面および内周面のそれぞれに交互に設けられている。このように、ガスケットに倒れ防止用突起部が設けられることで、ガスケットの倒れによる不良な変形を防止することができる。 In Patent Document 1, the fall prevention protrusions are provided at the same location on both sides of the gasket body in the width direction, only on the outer peripheral surface or only on the inner peripheral surface, or alternately provided on the outer peripheral surface and the inner peripheral surface. ing. In this way, by providing the gasket with a protrusion for preventing tilting, it is possible to prevent defective deformation due to tilting of the gasket.

しかし、ガスケットに倒れ防止用突起部が設けられることにより、ガスケットは倒れ防止用突起部の断面積が増加し、溝に挿入したときの溝に対するガスケットの充填率が増加することになる。つまり、ガスケットの断面が溝の断面に対して占める割合が高くなる。このように充填率が高くなると、ガスケットが溝からはみ出そうとする量が多くなる。このようになると、新たな問題が生じる。 However, since the gasket is provided with the fall prevention protrusion, the cross-sectional area of the fall prevention protrusion is increased, and the filling rate of the gasket with respect to the groove when inserted into the groove is increased. That is, the ratio of the cross section of the gasket to the cross section of the groove is high. When the filling rate is increased in this way, the amount of the gasket that tends to protrude from the groove increases. When this happens, new problems arise.

ガスケットが使用されるポンプ等の流体を扱う機器において、内部の流体の圧力は一般的にハウジングの内方から外方に向かって作用することが多い。つまり、ガスケットにはハウジングの内方から外方に向かう方向に圧力を受けるものである。 In fluid handling equipment such as pumps where gaskets are used, the pressure of the fluid inside generally acts from the inside to the outside of the housing. That is, the gasket receives pressure from the inside to the outside of the housing.

しかしながら、エンジン,ポンプ,ミッション等の密封性を要する機器では、水分又はオイル等の流体を扱い又は制御するものである。そして、機器の作動中に内部の流体の圧力は増減することがある。特に、ポンプでは、流体の圧力が変化し、その増減における差が大きくなり易い。そのために、流体の一部がハウジング本体とカバー板との間の微小な隙間から漏れ、その圧力がガスケットにかかることになる。 However, equipment that requires sealing, such as engines, pumps, and missions, handles or controls fluids such as moisture or oil. The pressure of the fluid inside may increase or decrease during the operation of the device. In particular, in a pump, the pressure of the fluid changes, and the difference in the increase or decrease tends to be large. Therefore, a part of the fluid leaks from a minute gap between the housing body and the cover plate, and the pressure is applied to the gasket.

ガスケットにかかる流体の圧力は、多くの時間ではハウジングの内方から外方に向かって作用するものであり、ガスケットの長手方向に直交する断面で且つ圧力のかかる上方箇所は、多くの時間では外方に向かって押圧され、上方部分が倒れるように傾斜する。特許文献1のように充填率が高いと、ガスケットの一部が溝からハウジング本体とカバー板の僅かな隙間に食い込む恐れが生じる。そして、このようなことが連続して起こると、ガスケットが劣化し、良好な密封性が保持できなくなる。そこで、本発明が解決しようとする技術的課題は、以上に述べたガスケットにおける欠点を解決することにある。 The pressure of the fluid on the gasket acts from the inside to the outside of the housing for many hours, and the cross section orthogonal to the longitudinal direction of the gasket and the upper part where pressure is applied is outside for many hours. It is pressed toward you and tilts so that the upper part falls. If the filling rate is high as in Patent Document 1, a part of the gasket may bite into a slight gap between the housing body and the cover plate from the groove. If such a situation occurs continuously, the gasket deteriorates and good sealing property cannot be maintained. Therefore, the technical problem to be solved by the present invention is to solve the above-mentioned drawbacks of the gasket.

そこで、発明者は、前記課題を解決すべく、鋭意,研究を重ねた結果、請求項1の発明を、長手方向に環状としてなるパッキン本体と内側倒れ防止部と外側倒れ防止部と外れ止め部とを備え、前記パッキン本体の幅方向の外周側には適宜の間隔をおいて複数の前記外側倒れ防止部が形成され、複数の該外側倒れ防止部が所定数連続する範囲内において内周側には1個の前記内側倒れ防止部が形成され、1個の該内側倒れ防止部と複数の前記外側倒れ防止部とが組として構成され、該組が前記パッキン本体の長手方向に多数設けられてなると共に、前記外れ止め部は前記パッキン本体の幅方向両側に設けられ、長手方向に沿う他の領域と比較して相対的に大きい正の圧力を受ける高圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも高くする構成とし、前記パッキン本体の長手方向に沿って、前記内側倒れ防止部とは同一の位置とはならないように前記外側倒れ防止部が設けられてなるパッキンとしたことにより、上記課題を解決した。 Therefore, as a result of diligent research to solve the above-mentioned problems, the inventor has made the invention of claim 1 a packing body, an inner fall prevention portion, an outer fall prevention portion, and a detachment prevention portion which are annular in the longitudinal direction. A plurality of the outer fall prevention portions are formed on the outer peripheral side of the packing body in the width direction at appropriate intervals, and the inner peripheral side within a range in which a predetermined number of the outer fall prevention portions are continuous. Is formed with one inner fall prevention portion, one inner fall prevention portion and a plurality of outer fall prevention portions are formed as a set, and a large number of the sets are provided in the longitudinal direction of the packing body. In addition, the retaining portions in the set are provided on both sides in the width direction of the packing body and are located in a high pressure receiving region that receives a relatively large positive pressure as compared with other regions along the longitudinal direction. The ratio of the number of the outer fall prevention parts is higher than the ratio of the number of the outer fall prevention parts in the set of other regions, and is the same as the inner fall prevention part along the longitudinal direction of the packing body. The above-mentioned problem was solved by using a packing provided with the outer fall prevention portion so as not to be in the position of .

請求項2の発明を、長手方向に環状としてなるパッキン本体と内側倒れ防止部と外側倒れ防止部と外れ止め部とを備え、前記パッキン本体の幅方向の外周側には適宜の間隔をおいて複数の前記外側倒れ防止部が形成され、複数の該外側倒れ防止部が所定数連続する範囲内において内周側には1個の前記内側倒れ防止部が形成され、1個の該内側倒れ防止部と複数の前記外側倒れ防止部とが組として構成され、該組が前記パッキン本体の長手方向に多数設けられてなると共に、前記外れ止め部は前記パッキン本体の幅方向両側に設けられ、長手方向に沿う他の領域と比較して相対的に大きい負の圧力を受ける低圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも低くする構成とし、前記パッキン本体の長手方向に沿って、前記内側倒れ防止部とは同一の位置とはならないように前記外側倒れ防止部が設けられてなるパッキンとしたことにより、上記課題を解決した。 The invention of claim 2 is provided with a packing body which is annular in the longitudinal direction, an inner fall prevention portion, an outer fall prevention portion, and a detachment prevention portion, and an appropriate interval is provided on the outer peripheral side of the packing body in the width direction. A plurality of the outer fall prevention portions are formed, and one inner fall prevention portion is formed on the inner peripheral side within a range in which a predetermined number of the outer fall prevention portions are continuous, and one inner fall prevention portion is formed. A portion and a plurality of the outer fall prevention portions are configured as a set, and a large number of the sets are provided in the longitudinal direction of the packing body, and the retaining portions are provided on both sides in the width direction of the packing body and are longitudinally provided. The ratio of the number of the outer fall prevention portions in the set located in the low pressure receiving region that receives a relatively large negative pressure as compared with other regions along the direction is the ratio of the outer fall prevention portions in the set in other regions. The packing is configured to be lower than the ratio of the number of the number of the packings, and the outer fall prevention portion is provided along the longitudinal direction of the packing body so as not to be in the same position as the inner fall prevention portion . This solved the above problem.

請求項3の発明を、請求項1又は2に記載のパッキンにおいて、幅方向両側の前記外れ止め部は、前記組の間に位置してなるパッキンとしたことにより、上記課題を解決した。 According to the third aspect of the present invention, in the packing according to the first or second aspect, the retaining portions on both sides in the width direction are the packings located between the sets, thereby solving the above-mentioned problems.

請求項4の発明を、請求項2に記載のパッキンにおいて、負の前記低圧受領域内での各前記組における前記外側倒れ防止部の個数は2としてなるパッキンとしたことにより、上記課題を解決した。 The above problem is solved by making the invention of claim 4 the packing according to claim 2 , wherein the number of the outer fall prevention portions in each set in the negative low voltage receiving region is 2. ..

請求項5の発明を、請求項1,2,3又は4の何れか1項に記載のパッキンにおいて、前記パッキン本体は、長手方向に直交する断面の高さ方向で且つ頂部に向かうに従い次第に狭い幅となる上部と該上部の下端と同等幅以上となる下部とを有し、前記内側倒れ防止部と前記外側倒れ防止部とは前記上部に形成され、前記外れ止め部は前記下部に形成されてなるパッキンとしたことにより、上記課題を解決した。 The invention of claim 5 is the packing according to any one of claims 1, 2, 3 or 4 , wherein the packing body is gradually narrowed in the height direction of a cross section orthogonal to the longitudinal direction and toward the top. It has an upper part that has a width and a lower part that has a width equal to or larger than the lower end of the upper part. The above-mentioned problem was solved by using the packing.

請求項1の発明では、エンジン,ポンプ,ミッション等で、且つ水,オイル等が充填される密封性を必要とする機器のハウジングにおいて、本発明のパッキンは、該パッキンを挿入する溝に対し低い充填率で挿入することができ、しかも少数の突起状の外れ止め部にて溝からの脱落を防止できる。さらに、機器作動時において内部の流体の圧力がパッキンにかかっても、内側倒れ防止部と外側倒れ防止部の組により、これら少数の突起にてパッキンの倒れを防止でき、極めて良好な密封性能を得ることができる。 In the invention of claim 1, the packing of the present invention is lower than the groove into which the packing is inserted in the housing of an engine, a pump, a mission, etc. It can be inserted at a filling rate, and it can be prevented from falling out of the groove with a small number of protruding retaining portions. Furthermore, even if the pressure of the internal fluid is applied to the packing when the equipment is operating, the combination of the inner fall prevention part and the outer fall prevention part can prevent the packing from falling with these few protrusions, and extremely good sealing performance is achieved. Obtainable.

また、内部の流体の圧力は正の圧力となることが多いため、内側倒れ防止部よりも外側倒れ防止部の数を多くしている。したがって、本発明のパッキンは、優れた耐久性を有するものである。さらに、前記パッキン本体は環状としたことにより、機器のハウジングの外部との密封を必要とする部位を包囲するように装着し易いものにできる。 Further, since the pressure of the fluid inside is often positive, the number of the outer fall prevention part is larger than that of the inner fall prevention part. Therefore, the packing of the present invention has excellent durability. Further, since the packing body has an annular shape, it can be easily attached so as to surround a portion of the device housing that needs to be sealed from the outside.

さらに、請求項1の発明では、パッキンは、長手方向に沿う他の領域と比較して相対的に大きい正の圧力を受ける高圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも高くする構成としたことにより、パッキンの高圧受領域ではパッキンの他の領域の組における外側倒れ防止部の数よりも多数の外側倒れ防止部を有することとなり、特にハウジングの内方から外方に向かう圧力に対して倒れを防止できる。 Further, in the invention of claim 1 , the packing is the ratio of the number of the outer fall prevention portions in the set located in the high pressure receiving region which receives a relatively large positive pressure as compared with other regions along the longitudinal direction. Is configured to be higher than the ratio of the number of outer fall prevention portions in the set of other regions, so that the number of outer fall prevention portions in the high pressure receiving region of the packing is larger than the number of outer fall prevention portions in the set of other regions of the packing. It has an outer fall prevention part, and can prevent the fall especially against the pressure from the inside to the outside of the housing.

請求項2の発明では、パッキンは、長手方向に沿う他の領域と比較して相対的に大きい負の圧力を受ける低圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも低くする構成としたことにより、パッキンの低圧受領域内では、特にハウジングの外方から内方に向かう圧力に対して倒れを防止できる。 In the invention of claim 2 , the packing has a ratio of the number of the outer fall prevention portions in the set located in the low pressure receiving region which receives a relatively large negative pressure as compared with the other regions along the longitudinal direction. By making the ratio lower than the ratio of the number of the outer fall prevention portions in the set of the area, it is possible to prevent the fall in the low pressure receiving region of the packing, especially against the pressure from the outside to the inside of the housing. ..

請求項3の発明では、幅方向両側の前記外れ止め部は、前記組の間に位置してなるパッキンとしたことにより、内側倒れ防止部と外側倒れ防止部とから構成される組と、外れ止め部とがパッキン本体の長手方向において同一位置に揃うことがない。そのために、パッキンを溝に挿入する際に、内側倒れ防止部と外側倒れ防止部と外れ止め部とがパッキンの長手方向において同一箇所にならないため、長手方向のどの箇所においても充填率も高くならず、パッキンの溝からのはみ出しを防止できる。請求項4の発明では、組における外側倒れ防止部の個数を2としたことで、前記組における内側倒れ防止部と外側倒れ防止部との個数の比率をパッキンの長手方向の何れの箇所においても1対2としたものである。したがって、1個の内側倒れ防止部と、2個の外側倒れ防止部との位置関係は三角形を構成することとなる。 According to the third aspect of the present invention, the retaining portions on both sides in the width direction are a packing located between the sets, so that the set is composed of an inner fall preventing portion and an outer falling preventing portion and is detached. The stoppers are not aligned at the same position in the longitudinal direction of the packing body. Therefore, when the packing is inserted into the groove, the inner fall prevention part, the outer fall prevention part, and the stopper part do not become the same place in the longitudinal direction of the packing, so that the filling rate is high in any place in the longitudinal direction. However, it is possible to prevent the packing from protruding from the groove. In the invention of claim 4 , by setting the number of the outer fall prevention part in the set to 2, the ratio of the number of the inner fall prevention part and the outer fall prevention part in the set is set to any part in the longitudinal direction of the packing. It is one-to-two. Therefore, the positional relationship between the one inner fall prevention portion and the two outer fall prevention portions forms a triangle.

これによって、流体を扱う密封性を要する機器のハウジングにおいて、その内部の流体により、ハウジングの内方側から外方側に向かってかかる圧力を、パッキンの長手方向に沿って設けられた各組の2個の外側倒れ防止部が受け止めると共に、2個の外側倒れ防止部の間に位置する内側倒れ防止部が補助することとなり、極めてバランスの取れた反力が作用してパッキンの上部の倒れを防止して、良好な密封性を維持できる。 As a result, in the housing of the equipment that requires sealing to handle the fluid, the pressure applied from the inner side to the outer side of the housing by the fluid inside the housing is applied to each set along the longitudinal direction of the packing. The two outer fall prevention parts receive it, and the inner fall prevention part located between the two outer fall prevention parts assists, and an extremely balanced reaction force acts to prevent the upper part of the packing from falling. It can be prevented and good sealing performance can be maintained.

また、パッキンにおいて、1個の内側倒れ防止部と、2個の外側倒れ防止部とを1つの組としてまとめたことにより、パッキン全体の外側倒れ防止部と内側倒れ防止部との個数を少なくでき、パッキンを溝に挿入配置するときでも、パッキンの溝に対する断面積の割合を少なくすること、つまり充填率を小さくできる。 Further, in the packing, one inner fall prevention part and two outer fall prevention parts are combined into one set, so that the number of outer fall prevention parts and inner fall prevention parts of the entire packing can be reduced. Even when the packing is inserted and arranged in the groove, the ratio of the cross-sectional area of the packing to the groove can be reduced, that is, the filling rate can be reduced.

よって、パッキンがハウジング内の流体から受ける圧力の影響を少なくし、且つ1個の内側倒れ防止部と、2個の外側倒れ防止部による組がパッキン上方部分の倒れを防止することができる。さらに、全体的に内側倒れ防止部と外側倒れ防止部との個数を少なくすることで、パッキンの溝への挿入作業を容易にすることと、倒れ防止機能を両立することができる。 Therefore, the influence of the pressure that the packing receives from the fluid in the housing is reduced, and the set of one inner fall prevention portion and the two outer fall prevention portions can prevent the upper portion of the packing from falling. Further, by reducing the number of the inner fall prevention portion and the outer fall prevention portion as a whole, it is possible to facilitate the work of inserting the packing into the groove and to achieve both the fall prevention function.

請求項5の発明では、パッキン本体は、長手方向に直交する断面の高さ方向で且つ頂部に向かうに従い次第に狭い幅となる上部と該上部の下端と同等幅以上となる下部とを有し、前記内側倒れ防止部と前記外側倒れ防止部は前記上部に形成され、前記外れ止め部は前記下部に形成される構成としたことにより、機器のハウジング又はカバー板の何れか一方に形成された溝に本発明のパッキンの下部から上部に向かって挿入されるように配置することにより、本発明のパッキンは、機器内の溝に対して充填率を低く抑えることができ、極めて安定した状態で設置することができる。
In the invention of claim 5 , the packing main body has an upper portion having a width gradually narrowing toward the top in the height direction of a cross section orthogonal to the longitudinal direction, and a lower portion having a width equal to or more than the lower end of the upper portion. The inner fall prevention portion and the outer fall prevention portion are formed in the upper portion, and the retaining portion is formed in the lower portion, so that a groove formed in either the housing or the cover plate of the device is formed. By arranging the packing of the present invention so as to be inserted from the lower part to the upper part of the packing, the packing of the present invention can keep the filling rate low with respect to the groove in the device, and is installed in an extremely stable state. can do.

(A)は本発明におけるパッキンの平面図、(B)は(A)の(α)部拡大図、(C)は(B)のY1-Y1矢視拡大断面図、(D)は(B)のY2-Y2矢視拡大断面図、(E)は(B)のY3-Y3矢視拡大断面図、(F)は(B)のY4-Y4矢視拡大断面図である。(A) is a plan view of the packing in the present invention, (B) is an enlarged view of part (α) of (A), (C) is an enlarged sectional view of Y1-Y1 arrow of (B), and (D) is (B). ) Is a Y2-Y2 arrow-viewing enlarged cross-sectional view, (E) is a Y3-Y3 arrow-viewing enlarged cross-sectional view of (B), and (F) is a Y4-Y4 arrow-viewing enlarged cross-sectional view of (B). (A)は本発明におけるパッキンと溝との要部箇所拡大斜視図、(B)はパッキンの内側倒れ防止部箇所の拡大斜視図、(C)はパッキンの外れ止め部箇所の拡大斜視図である。(A) is an enlarged perspective view of a main part of the packing and a groove in the present invention, (B) is an enlarged perspective view of an inner fall prevention part of the packing, and (C) is an enlarged perspective view of a part of the packing that prevents the packing from coming off. be. (A)は本発明においてハウジングの溝に挿入されたパッキンの要部拡大平面図、(B)は(A)のY5-Y5矢視拡大断面図、(C)は(A)のY6-Y6矢視拡大断面図、(D)は(A)のY7-Y7矢視拡大断面図である。(A) is an enlarged plan view of a main part of the packing inserted into the groove of the housing in the present invention, (B) is an enlarged cross-sectional view taken along the line Y5-Y5 of (A), and (C) is Y6-Y6 of (A). An enlarged cross-sectional view taken along the arrow, (D) is an enlarged cross-sectional view taken along the line Y7-Y7 of (A). (A)は本発明のパッキンの第2実施形態の要部拡大平面図、(B)は本発明のパッキンの第2実施形態の要部拡大斜視図、(C)は本発明のパッキンの第3実施形態の要部拡大平面図、(D)は本発明のパッキンの第3実施形態の要部拡大斜視図である。(A) is an enlarged plan view of a main part of the second embodiment of the packing of the present invention, (B) is an enlarged perspective view of a main part of the second embodiment of the packing of the present invention, and (C) is a first view of the packing of the present invention. 3 An enlarged plan view of a main part of the embodiment, (D) is an enlarged perspective view of the main part of the third embodiment of the packing of the present invention. (A)及び(B)は本発明のパッキンの組における内側倒れ防止部と両方の外側倒れ防止部との形状を異なるものとした構成の要部拡大平面図、(C)は本発明のパッキンの組における内側倒れ防止部と両方の外側倒れ防止部との間隔を異なる構成とした要部拡大平面図である。(A) and (B) are enlarged plan views of main parts having different shapes of the inner fall prevention portion and both outer fall prevention portions in the packing set of the present invention, and (C) is the packing of the present invention. It is an enlarged plan view of the main part in which the distance between the inner fall prevention part and both outer fall prevention parts in the set is different. 本発明のパッキンにおいて組における外側倒れ防止部の個数を3とした実施形態の要部平面図である。FIG. 3 is a plan view of a main part of an embodiment in which the number of outer fall prevention parts in a set is 3 in the packing of the present invention. (A)は本発明のパッキンと内部構造を省略したハウジング本体の平面図、(B)は本発明のパッキンの内部構造を省略したハウジング本体の溝に装着しようとする縦断側面図、(C)はハウジング本体にカバー板を装着した状態の縦断側面図、(D)はハウジング本体の溝に挿入されたパッキンに流体の圧力が掛かる状態を示す拡大断面図である。(A) is a plan view of the housing body in which the packing and the internal structure of the present invention are omitted, (B) is a vertical sectional side view to be mounted in the groove of the housing body in which the internal structure of the packing of the present invention is omitted, (C). Is a vertical sectional side view showing a state in which the cover plate is attached to the housing body, and FIG. 3D is an enlarged cross-sectional view showing a state in which fluid pressure is applied to the packing inserted in the groove of the housing body. (A)は本発明のパッキンの高圧受領域において組の外側倒れ防止部の間隔を狭めた実施形態の要部平面図、(B)は本発明のパッキンの高圧受領域及び低圧受領域における組の構成を示す実施形態の要部平面図、(C)は(B)の(β)部拡大図である。(A) is a plan view of a main part of an embodiment in which the distance between the outer fall prevention portions of the set is narrowed in the high-pressure receiving region of the packing of the present invention, and (B) is the set in the high-pressure receiving region and the low-pressure receiving region of the packing of the present invention. The plan view of the main part of the embodiment showing the configuration of (C) is an enlarged view of the part (β) of (B).

以下、本発明の実施形態を図面に基づいて説明する。本発明のパッキンAは、図1に示すように、無端且つ可撓性を有する環(ループ)形状としたものである。パッキンAは、ポンプ,エンジン,ミッション等の流体が通過する機器に装着されるものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the packing A of the present invention has an endless and flexible ring shape. The packing A is attached to equipment such as a pump, an engine, and a mission through which a fluid passes.

具体的には、前記機器のハウジングBは、ハウジング本体5とカバー板6にて構成され、ハウジング本体5又はカバー板6の何れか一方にパッキンAが挿入される溝7が形成されている(図7参照)。以下の説明では、溝7はハウジング本体5側に形成されているものとして説明する。 Specifically, the housing B of the device is composed of a housing body 5 and a cover plate 6, and a groove 7 into which the packing A is inserted is formed in either the housing body 5 or the cover plate 6 (). See FIG. 7). In the following description, the groove 7 will be described as being formed on the housing body 5 side.

パッキンAは、円弧形状,長方形状等の定形的な形状に限定されるものではなく、後述する機器のハウジングBにおける溝7の全体形状と略等しくなるように形成されるものである〔図7(A)参照〕。パッキンAは、パッキン本体1と内側倒れ防止部2と、外側倒れ防止部3と、外れ止め部4とを備えたものである。パッキン本体1は、前述したように、パッキンA全体の形状を構成するものであり、長手方向に細長としたものである〔図1(A)参照〕。ここで、パッキンAの長手方向とは、パッキンAを部分的に見た状態であり〔図1(B)参照〕、パッキンAを全体として見ると、その長手方向を周方向と称してもよい。 The packing A is not limited to a fixed shape such as an arc shape or a rectangular shape, but is formed so as to be substantially equal to the overall shape of the groove 7 in the housing B of the device described later [FIG. 7]. (A)]. The packing A includes a packing main body 1, an inner fall prevention portion 2, an outer fall prevention portion 3, and a detachment prevention portion 4. As described above, the packing main body 1 constitutes the shape of the entire packing A and is elongated in the longitudinal direction [see FIG. 1 (A)]. Here, the longitudinal direction of the packing A is a state in which the packing A is partially viewed [see FIG. 1 (B)], and when the packing A is viewed as a whole, the longitudinal direction thereof may be referred to as a circumferential direction. ..

そして、以下の説明において、環状のパッキンAにおいて、環状に連なる周方向を長手方向とする〔図1(A)参照〕。また、パッキンAの長手方向に直交する断面を基にして、その左右方向を幅方向とする。環状としたパッキン本体1では、内周側と外周側とが存在する〔図1(A)参照〕。パッキンAは、ハウジングBにおけるハウジング本体5とカバー板6との間に装着され、ハウジングBの内部の圧力を発生させるインペラやロータ等の主要構造部分を覆うもので、パッキン本体1の内周側は前記主要構造部分に近接した部位である〔図7(A)参照〕。従って、パッキン本体1の内周側は、ポンプ等の流体を扱うハウジングBでは、流体の圧力を受けることがある。 Then, in the following description, in the annular packing A, the circumferential direction connected in the annular direction is defined as the longitudinal direction [see FIG. 1 (A)]. Further, based on the cross section orthogonal to the longitudinal direction of the packing A, the left-right direction thereof is defined as the width direction. In the annular packing body 1, there are an inner peripheral side and an outer peripheral side [see FIG. 1 (A)]. The packing A is mounted between the housing body 5 and the cover plate 6 in the housing B, and covers the main structural parts such as the impeller and the rotor that generate the pressure inside the housing B, and is on the inner peripheral side of the packing body 1. Is a site close to the main structural part [see FIG. 7 (A)]. Therefore, the inner peripheral side of the packing body 1 may receive the pressure of the fluid in the housing B that handles the fluid such as a pump.

該パッキン本体1の長手方向に直交する断面形状は、その高さ方向において上部11と下部12とから構成されている〔図1(C)乃至(F)参照〕。上部11は、パッキン本体1の長手方向に直交する断面の高さ方向(溝7の浅い側に対応)であり、頂部に向かうに従い次第に狭い幅となる形状である。つまり、上部11は、断面略三角山形状をなしている。 The cross-sectional shape orthogonal to the longitudinal direction of the packing body 1 is composed of an upper portion 11 and a lower portion 12 in the height direction thereof [see FIGS. 1 (C) to 1 (F)]. The upper portion 11 has a height direction of a cross section orthogonal to the longitudinal direction of the packing body 1 (corresponding to the shallow side of the groove 7), and has a shape that gradually becomes narrower toward the top. That is, the upper portion 11 has a substantially triangular mountain shape in cross section.

該上部11の先端及びその付近つまり頂部付近は、断面略円弧状又は平坦状に形成されている。これは、後述するハウジングBのカバー板6に押圧されて押し潰された状態で、密着し易い構成にするためである。下部12は、長手方向に直交する断面が略方形状に形成されている。さらに、下部12は、具体的には、断面長方形状又は断面正方形状に形成されている。下部12の断面底部箇所の幅方向両角部は円弧状に形成されている〔図1(C)乃至(F)参照〕。 The tip of the upper portion 11 and its vicinity, that is, the vicinity of the top, are formed in a substantially arcuate or flat cross section. This is to make it easy to adhere to the cover plate 6 of the housing B, which will be described later, in a state of being pressed and crushed. The lower portion 12 is formed with a substantially rectangular cross section orthogonal to the longitudinal direction. Further, the lower portion 12 is specifically formed in a rectangular cross section or a square cross section. Both corners in the width direction of the bottom portion of the cross section of the lower portion 12 are formed in an arc shape [see FIGS. 1 (C) to 1 (F)].

下部12は、前記上部11の下端と同等幅以上となる幅方向寸法を有する。パッキン本体1の下部12は、ハウジングBのハウジング本体5又はカバー板6の何れか一方に形成される溝7に最初に挿入される部位である。パッキン本体1がハウジングBの溝7に挿入された状態で、上部11の一部は、溝7の開口上端面から上方(外方)に突出する。 The lower portion 12 has a width direction dimension equal to or larger than the lower end of the upper portion 11. The lower portion 12 of the packing body 1 is a portion that is first inserted into the groove 7 formed in either the housing body 5 or the cover plate 6 of the housing B. With the packing body 1 inserted into the groove 7 of the housing B, a part of the upper portion 11 projects upward (outward) from the upper end surface of the opening of the groove 7.

パッキン本体1の上部11が溝7の開口上端面から突出する部分は、カバー板6との接合面によって押圧され、押し潰されながらカバー板6の接合面に密着し、ハウジングBの密封状態を構成する。パッキン本体1の下部12の長手方向に直交する断面の幅方向寸法は、ハウジングBの溝7の幅方向寸法と同等以下とすることが好ましい。これは、パッキン本体1の溝7に対する充填率を低く抑えるためである。 The portion where the upper portion 11 of the packing body 1 protrudes from the upper end surface of the opening of the groove 7 is pressed by the joint surface with the cover plate 6 and adheres to the joint surface of the cover plate 6 while being crushed, so that the housing B is sealed. Configure. The widthwise dimension of the cross section orthogonal to the longitudinal direction of the lower portion 12 of the packing body 1 is preferably equal to or less than the widthwise dimension of the groove 7 of the housing B. This is to keep the filling rate of the packing body 1 for the groove 7 low.

ここで、前記充填率とは、溝7の長手方向に直交する断面に対して、挿入されたパッキンAの長手方向に直交する断面が実質的に占める割合のことをいう。充填率は、100%の場合では、パッキン本体1の長手方向に直交する断面が、溝7の長手方向に直交する断面と等しいことを意味する。したがって、充填率が100%未満では、パッキンAが挿入された溝7内において、パッキン本体1と溝7との間に隙間が生じるものである。充填率が低いということは、パッキン本体1と溝7との間に生じる空隙が多くなることである。 Here, the filling factor means a ratio substantially occupied by the cross section orthogonal to the longitudinal direction of the inserted packing A with respect to the cross section orthogonal to the longitudinal direction of the groove 7. In the case of 100%, the filling factor means that the cross section orthogonal to the longitudinal direction of the packing body 1 is equal to the cross section orthogonal to the longitudinal direction of the groove 7. Therefore, when the filling rate is less than 100%, a gap is formed between the packing main body 1 and the groove 7 in the groove 7 into which the packing A is inserted. A low filling rate means that there are many voids formed between the packing body 1 and the groove 7.

したがって、充填率を可能な限り低くすることにより、パッキンAの溝7への挿入が容易にできる。また、パッキンAの溝7への挿入が完了し、ハウジング本体5にカバー板6が装着されるときに、パッキンAのパッキン本体1の一部が溝7からはみ出すことがなく、よってハウジング本体5とカバー板6との僅かな隙間部分にパッキン本体1の一部が食い込むことを防止でき、パッキンAの損傷を防止すると共に、密封性を高く維持することができる。 Therefore, by making the filling rate as low as possible, the packing A can be easily inserted into the groove 7. Further, when the insertion of the packing A into the groove 7 is completed and the cover plate 6 is attached to the housing body 5, a part of the packing body 1 of the packing A does not protrude from the groove 7, so that the housing body 5 does not protrude. It is possible to prevent a part of the packing body 1 from biting into a slight gap between the cover plate 6 and the cover plate 6, prevent damage to the packing A, and maintain high sealing performance.

パッキン本体1の幅方向において内周側に複数の内側倒れ防止部2が形成され、外周側に内側倒れ防止部2の数よりも多数の外側倒れ防止部3が形成されている〔図1(A),(B)参照〕。内側倒れ防止部2及び外側倒れ防止部3は、パッキンAが溝7に挿入され、ハウジング本体5にカバー板6を装着するときに、パッキン本体1の上部11が、適正に押圧されないで、内側又は外側に傾いて押圧されてしまうことを防止する役目をなすものである。複数の外側倒れ防止部3は、パッキン本体1の長手方向に沿って適宜の間隔をおいて形成されている。 In the width direction of the packing body 1, a plurality of inner fall prevention portions 2 are formed on the inner peripheral side, and more outer fall prevention portions 3 are formed on the outer peripheral side than the number of inner fall prevention portions 2 [FIG. 1 (FIG. 1). See A) and (B)]. In the inner fall prevention portion 2 and the outer fall prevention portion 3, when the packing A is inserted into the groove 7 and the cover plate 6 is attached to the housing body 5, the upper portion 11 of the packing body 1 is not properly pressed and is inside. Alternatively, it serves to prevent the product from being pressed by tilting outward. The plurality of outer fall prevention portions 3 are formed at appropriate intervals along the longitudinal direction of the packing main body 1.

多数の外側倒れ防止部3は、パッキンAにおけるパッキン本体1の幅方向の外周側に適宜の間隔をおいて形成されている。そして、多数の外側倒れ防止部3において、該外側倒れ防止部3が所定数連続する範囲内において、前記パッキン本体1の内周側には1個の内側倒れ防止部2が形成され、これら1個の内側倒れ防止部2と、複数の外側倒れ防止部3とが組A1として構成される。 A large number of outer fall prevention portions 3 are formed on the outer peripheral side of the packing body 1 in the width direction of the packing A at appropriate intervals. Then, in a large number of outer fall prevention portions 3, one inner fall prevention portion 2 is formed on the inner peripheral side of the packing main body 1 within a range in which the outer fall prevention portions 3 are continuous by a predetermined number. The inner fall prevention portion 2 and the plurality of outer fall prevention portions 3 are configured as a set A1.

換言すると、組A1は、1個の内側倒れ防止部2と、所定数の複数の外側倒れ防止部3とからなる集合体である。外側倒れ防止部3の所定数連続する場合の所定数とは、2個以上である。さらに、組A1では、複数の前記外側倒れ防止部3は何れも、パッキン本体1の長手方向に沿って、1個の内側倒れ防止部2とは同一の位置とはならないように構成される。 In other words, the set A1 is an aggregate composed of one inner fall preventing portion 2 and a predetermined number of outer fall preventing portions 3. When a predetermined number of the outer fall prevention portions 3 are continuous, the predetermined number is two or more. Further, in the set A1, none of the plurality of outer fall preventing portions 3 is configured to be in the same position as one inner fall preventing portion 2 along the longitudinal direction of the packing main body 1.

ただし、内側倒れ防止部2と外側倒れ防止部3とが長手方向に近接する状態でも組A1の構成に含まれる。つまり組A1において、内側倒れ防止部2の長手方向における位置とはずれた位置に外側倒れ防止部3が配置される。該組A1は、パッキン本体1の長手方向に沿って複数の組が設けられる〔図1(A),(B),図2(A),図3(A)参照〕。 However, even in a state where the inner fall prevention portion 2 and the outer fall prevention portion 3 are close to each other in the longitudinal direction, they are included in the configuration of the set A1. That is, in the set A1, the outer fall prevention portion 3 is arranged at a position deviated from the position in the longitudinal direction of the inner fall prevention portion 2. A plurality of sets A1 are provided along the longitudinal direction of the packing body 1 [see FIGS. 1 (A), (B), 2 (A), and 3 (A)].

以下、組A1は、1個の内側倒れ防止部2と、2個の外側倒れ防止部3,3とした構成にて説明する。したがって、組A1における内側倒れ防止部2と外側倒れ防止部3との個数の比率は1対2となる。組A1において、1個の内側倒れ防止部2に対してパッキン本体1の長手方向に沿う両側に所定間隔を有して外側倒れ防止部3がそれぞれ配置される〔図3(A)参照〕。 Hereinafter, the set A1 will be described with a configuration in which one inner fall prevention portion 2 and two outer fall prevention portions 3 and 3 are provided. Therefore, the ratio of the number of the inner fall preventing portion 2 and the outer fall preventing portion 3 in the set A1 is 1: 2. In the set A1, the outer fall preventing portions 3 are arranged on both sides of the packing main body 1 along the longitudinal direction with respect to one inner fall preventing portion 2 [see FIG. 3 (A)].

該組A1は、パッキン本体1の長手方向に沿って所定間隔をおいて複数設けられている〔図1(A),(B),図2(A),図3(A)参照〕。そして、パッキン本体1の長手方向に沿って隣接する組A1,A1間には、外れ止め部4,4が設けられる。両外れ止め部4,4は、パッキン本体1の幅方向両側に形成され、且つ両該外れ止め部4,4は、パッキン本体1の長手方向において同等位置に設けられる〔図1(A),(B),図2(A),図3(A)参照〕。 A plurality of the sets A1 are provided at predetermined intervals along the longitudinal direction of the packing body 1 [see FIGS. 1 (A), (B), 2 (A), and 3 (A)]. Then, the retaining portions 4 and 4 are provided between the sets A1 and A1 adjacent to each other along the longitudinal direction of the packing main body 1. Both retaining portions 4 and 4 are formed on both sides of the packing main body 1 in the width direction, and both retaining portions 4 and 4 are provided at equivalent positions in the longitudinal direction of the packing main body 1 [FIGS. 1 (A), (B), FIG. 2 (A), FIG. 3 (A)].

つまり、パッキン本体1の長手方向に沿って組A1と外れ止め部4,4が交互に配置される状態となる〔図1(A)参照〕。組A1の総数は、パッキン本体1の全長に対応して増減する。両外れ止め部4,4がパッキン本体1の幅方向両側の同等位置に設けられる構成には、両側の外れ止め部4,4の位置が完全に一致せず、外れ止め部4の突起の長手方向の幅程度のずれも同等範囲に含まれる。また、パッキン本体1の幅方向両側の外れ止め部4,4は、隣接する組A1,A1間ではなく、組A1の範囲内に入り込んで設けられることもある。 That is, the set A1 and the retaining portions 4 and 4 are alternately arranged along the longitudinal direction of the packing body 1 [see FIG. 1 (A)]. The total number of sets A1 increases or decreases according to the total length of the packing body 1. In the configuration in which both the retaining portions 4 and 4 are provided at the same positions on both sides of the packing body 1 in the width direction, the positions of the retaining portions 4 and 4 on both sides do not completely match, and the length of the protrusion of the retaining portion 4 is long. A deviation of about the width in the direction is also included in the same range. Further, the retaining portions 4 and 4 on both sides of the packing main body 1 in the width direction may be provided so as to be within the range of the set A1 instead of between the adjacent sets A1 and A1.

内側倒れ防止部2は、パッキン本体1の上部11の内周側に形成され、具体的には上部11の幅方向の内周側の傾斜面11aから幅方向外方に膨出するように形成される〔図1(B),(D),図3(A)参照〕。同様に、外側倒れ防止部3は、パッキン本体1の上部11の外周側に形成され、上部11の幅方向の外周側の傾斜面11aから幅方向外方に膨出するように形成される〔図1(B),(E),図3(A)参照〕。 The inward fall prevention portion 2 is formed on the inner peripheral side of the upper portion 11 of the packing main body 1, and specifically, is formed so as to bulge outward in the width direction from the inclined surface 11a on the inner peripheral side in the width direction of the upper portion 11. [See FIGS. 1 (B), (D), 3 (A)]. Similarly, the outer fall prevention portion 3 is formed on the outer peripheral side of the upper portion 11 of the packing main body 1 and is formed so as to bulge outward in the width direction from the inclined surface 11a on the outer peripheral side in the width direction of the upper portion 11. 1 (B), (E), see FIG. 3 (A)].

内側倒れ防止部2と外側倒れ防止部3とは、パッキン本体1の長手方向に直交する断面の両側において左右対称で同一形状となっている。内側倒れ防止部2と外側倒れ防止部3は、パッキン本体1の上部11において、上方から或いは平面的に見て円弧形状に形成される〔図1(C)乃至(F)参照〕。 The inner fall prevention portion 2 and the outer fall prevention portion 3 are symmetrical and have the same shape on both sides of the cross section orthogonal to the longitudinal direction of the packing main body 1. The inner fall prevention portion 2 and the outer fall prevention portion 3 are formed in the upper portion 11 of the packing main body 1 in an arc shape when viewed from above or in a plane [see FIGS. 1 (C) to 1 (F)].

内側倒れ防止部2と外側倒れ防止部3は、上部11の下端箇所から、上部11の傾斜面11aに沿って、上部11の頂部よりも少し低い位置のところまで形成されている。内側倒れ防止部2と外側倒れ防止部3のそれぞれの上端は平坦面となっている。また、内側倒れ防止部2と外側倒れ防止部3とは、それぞれの上端の高さ方向の位置は同一であるが、これに限定されることなく異なるものであっても構わない。 The inner fall prevention portion 2 and the outer fall prevention portion 3 are formed from the lower end portion of the upper portion 11 to a position slightly lower than the top portion of the upper portion 11 along the inclined surface 11a of the upper portion 11. The upper ends of each of the inner fall prevention portion 2 and the outer fall prevention portion 3 are flat surfaces. Further, the inner fall prevention portion 2 and the outer fall prevention portion 3 have the same position in the height direction of the upper end thereof, but may be different without limitation.

また、パッキンAが溝7に挿入配置された状態で、内側倒れ防止部2と外側倒れ防止部3の上端は、溝7内に収まるように設定される。つまり、パッキンAが溝7に適正に挿入された状態で、内側倒れ防止部2と外側倒れ防止部3の上端は、溝7の開口上端面よりも低い位置に存在することになる〔図3(C)参照〕。 Further, with the packing A inserted and arranged in the groove 7, the upper ends of the inner fall prevention portion 2 and the outer fall prevention portion 3 are set so as to fit in the groove 7. That is, with the packing A properly inserted into the groove 7, the upper ends of the inner fall prevention portion 2 and the outer fall prevention portion 3 are located at positions lower than the opening upper end surface of the groove 7 [FIG. 3]. (C)].

また、パッキン本体1の長手方向に直交する断面の幅方向における内側倒れ防止部2と外側倒れ防止部3の上端の幅方向に突出する量は、上部11下端における突出する量よりも少なく設定されることもある〔図1(D),(E)参照〕。つまり、パッキンAが溝7に挿入された状態で、内側倒れ防止部2と外側倒れ防止部3の下端部分とが溝7の側壁に当接又は近接し、上端部分とは隙間を有する状態となる。 Further, the amount of protrusion in the width direction of the upper ends of the inner fall prevention portion 2 and the outer fall prevention portion 3 in the width direction of the cross section orthogonal to the longitudinal direction of the packing body 1 is set to be smaller than the amount of protrusion at the lower end of the upper portion 11. In some cases [see FIGS. 1 (D) and 1 (E)]. That is, with the packing A inserted in the groove 7, the lower end portion of the inner fall prevention portion 2 and the outer fall prevention portion 3 abuts or approaches the side wall of the groove 7, and has a gap from the upper end portion. Become.

内側倒れ防止部2と外側倒れ防止部3の上方から又は平面的に見た形状が方形状としたタイプも存在する〔図4(A),(B)参照〕。ここで、方形状とは長方形,正方形又は台形が含まれる。さらに、内側倒れ防止部2と外側倒れ防止部3の上方から又は平面的に見た形状が三角形状に形成されたタイプも存在する〔図4(C),(D)参照〕。 There is also a type in which the shape seen from above the inner fall prevention portion 2 and the outer fall prevention portion 3 or when viewed in a plane is rectangular [see FIGS. 4 (A) and 4 (B)]. Here, the square shape includes a rectangle, a square, or a trapezoid. Further, there is also a type in which the shape seen from above the inner fall prevention portion 2 and the outer fall prevention portion 3 or when viewed in a plane is formed into a triangular shape [see FIGS. 4 (C) and 4 (D)].

1つの組A1内において、以上に述べた内側倒れ防止部2と外側倒れ防止部3の形状を異なるものとしても構わない。具体的には、組A1において、内側倒れ防止部2は上方より見て円弧形状とし、外側倒れ防止部3は上方より見て方形状又は三角形状に形成されたものである〔図5(A)参照〕。或いは、組A1内において、内側倒れ防止部2は上方より見て方形状又は三角形状とし、前記外側倒れ防止部3は上方より見て円弧形状に形成されることもある〔図5(B)参照〕。 In one set A1, the shapes of the inner fall prevention portion 2 and the outer fall prevention portion 3 described above may be different. Specifically, in the set A1, the inner fall prevention portion 2 is formed in an arc shape when viewed from above, and the outer fall prevention portion 3 is formed in a rectangular shape or a triangular shape when viewed from above [FIG. 5 (A). )reference〕. Alternatively, in the set A1, the inner fall prevention portion 2 may be formed in a rectangular shape or a triangular shape when viewed from above, and the outer fall prevention portion 3 may be formed in an arc shape when viewed from above [FIG. 5 (B). reference〕.

また、組A1内において、内側倒れ防止部2と、該内側倒れ防止部2の長手方向両側に位置する外側倒れ防止部3,3とのそれぞれの間隔Lは、同一としたものである〔図3(A)参照〕。さらに、組A1において、内側倒れ防止部2と、該内側倒れ防止部2の長手方向両側に位置する一方の外側倒れ防止部3までの間隔L1と、他方の外側倒れ防止部3までの間隔L2を異ならせることもある〔図5(C)参照〕。 Further, in the set A1, the distance L between the inner fall prevention portion 2 and the outer fall prevention portions 3 and 3 located on both sides of the inner fall prevention portion 2 in the longitudinal direction is the same [Fig.]. 3 (A)]. Further, in the set A1, the distance L1 between the inner fall prevention portion 2 and one outer fall prevention portion 3 located on both sides in the longitudinal direction of the inner fall prevention portion 2 and the distance L2 between the other outer fall prevention portion 3 May be different [see FIG. 5 (C)].

外れ止め部4は、パッキン本体1の下部12に形成される〔図1(F),図2等参照〕。外れ止め部4は、下部12の長手方向に直交する断面の幅方向において、長手方向の同一箇所に形成される。外れ止め部4は、下部12の幅方向に略円弧状に膨出する形状に形成される。外れ止め部4は、パッキンAが溝7に挿入されるときに、両外れ止め部4,4が溝7の幅方向の両側壁によって押圧されて潰される部位であり、溝7に一旦挿入されたパッキンAが、組付け作業又は輸送過程で溝7から脱落することを防止する役目をなす〔図3(A)参照〕。 The retaining portion 4 is formed in the lower portion 12 of the packing main body 1 [see FIG. 1 (F), FIG. 2, etc.]. The retaining portion 4 is formed at the same position in the longitudinal direction in the width direction of the cross section orthogonal to the longitudinal direction of the lower portion 12. The retaining portion 4 is formed in a shape that bulges in a substantially arc shape in the width direction of the lower portion 12. The retaining portion 4 is a portion where both retaining portions 4 and 4 are pressed and crushed by both side walls in the width direction of the groove 7 when the packing A is inserted into the groove 7, and is once inserted into the groove 7. The packing A serves to prevent the packing A from falling off from the groove 7 during the assembly work or the transportation process [see FIG. 3 (A)].

各組A1において、1個の内側倒れ防止部2と、2個の外側倒れ防止部3,3は、その位置関係が三角形を構成する〔図3(A)の点線を参照〕。この内側倒れ防止部2と外側倒れ防止部3との三角形の位置関係により、組A1内における内側倒れ防止部2と外側倒れ防止部3とは、パッキンAの上部11の外周側への倒れを確実に防止することができる。 In each set A1, one inner fall prevention portion 2 and two outer fall prevention portions 3 and 3 form a triangle in their positional relationship [see the dotted line in FIG. 3A]. Due to the triangular positional relationship between the inner fall prevention portion 2 and the outer fall prevention portion 3, the inner fall prevention portion 2 and the outer fall prevention portion 3 in the set A1 cause the upper portion 11 of the packing A to fall to the outer peripheral side. It can be reliably prevented.

エンジン,ポンプ,ミッション等の水,オイル等が充填される密封性を必要とする機器のハウジングBでは、該ハウジングB内の流体がハウジング本体5とカバー板6との合わさる面の僅かな隙間から、溝7に流入し、該溝7に挿入されたパッキンAに圧力Pがかかる。そこで、組A1における1個の内側倒れ防止部2と、2個の外側倒れ防止部3,3とが、その位置関係において三角形を構成することとなる。 In housing B of equipment such as engines, pumps, missions, etc., which is filled with water, oil, etc. and requires sealing performance, the fluid in the housing B passes through a slight gap on the surface where the housing body 5 and the cover plate 6 meet. , The pressure P is applied to the packing A that flows into the groove 7 and is inserted into the groove 7. Therefore, one inner fall prevention portion 2 and two outer fall prevention portions 3 and 3 in the set A1 form a triangle in the positional relationship.

これによって、ハウジングBの内方側から外方側に向かってかかる圧力Pを、パッキンAの長手方向に沿って設けられた各組A1組の2個の外側倒れ防止部3,3に反力Fが作用してパッキンAの上部11の倒れを防止して、良好な密封性を維持できる〔図7(D)参照〕。逆にハウジングBの内方側が吸入負圧や低温による負圧となる事が、大気圧より高くなる頻度よりは低い頻度ではあるが起こりうる。そのため外側倒れ防止部3,3よりは少ない個数の内側倒れ防止部2にて上部11の倒れを防止する。 As a result, the pressure P applied from the inner side to the outer side of the housing B is reacted to the two outer fall prevention portions 3 and 3 of each set A1 set provided along the longitudinal direction of the packing A. F acts to prevent the upper portion 11 of the packing A from collapsing, and good sealing performance can be maintained [see FIG. 7 (D)]. On the contrary, it is possible that the inner side of the housing B becomes a suction negative pressure or a negative pressure due to a low temperature, although the frequency is lower than the frequency of being higher than the atmospheric pressure. Therefore, the upper portion 11 is prevented from falling by the number of inner fall preventing portions 2 which is smaller than that of the outer fall preventing portions 3 and 3.

また、パッキンAにおいて、1個の内側倒れ防止部2と、2個の外側倒れ防止部3,3とを1つの組A1としてまとめたことにより、パッキンA全体の内側倒れ防止部2と外側倒れ防止部3との個数を少なくでき、これによって、パッキンAを溝7に挿入配置するときでも、パッキンAの溝7に対する占有面積を少なくすること、つまり充填率を小さくできる。 Further, in the packing A, one inner fall prevention portion 2 and two outer fall prevention portions 3 and 3 are combined into one set A1, so that the inner fall prevention portion 2 and the outer fall prevention portion 2 and the outer fall of the entire packing A are combined. The number of the preventing portions 3 can be reduced, whereby the area occupied by the packing A with respect to the groove 7 can be reduced, that is, the filling rate can be reduced even when the packing A is inserted and arranged in the groove 7.

よって、パッキンAがハウジングB内の流体から受ける圧力の影響を少なくし、且つ1個の内側倒れ防止部2と、2個の外側倒れ防止部3による組A1がパッキンAの上部11の倒れを防止することができる。さらに全体的に内側倒れ防止部2と外側倒れ防止部3との個数を少なくすることで、パッキンAの溝7への挿入作業を容易にすることができる。 Therefore, the influence of the pressure that the packing A receives from the fluid in the housing B is reduced, and the set A1 by the one inner fall prevention portion 2 and the two outer fall prevention portions 3 causes the upper portion 11 of the packing A to fall. Can be prevented. Further, by reducing the number of the inner fall prevention portion 2 and the outer fall prevention portion 3 as a whole, the work of inserting the packing A into the groove 7 can be facilitated.

ここで、ハウジングBの内方側の圧力が高くなる領域(吐出ポート近傍)では上部11がより外側に倒れ易くなるため組A1内において、外側倒れ防止部3の個数を3以上とすれば上部11の外側への倒れを防止できる。図6は、パッキンAの組A1において、外側倒れ防止部3の個数を3とした実施形態である。 Here, in the region where the pressure on the inner side of the housing B is high (near the discharge port), the upper portion 11 is more likely to fall outward. Therefore, if the number of outer fall prevention portions 3 in the set A1 is 3 or more, the upper portion It is possible to prevent the 11 from falling to the outside. FIG. 6 shows an embodiment in which the number of outer fall prevention portions 3 in the packing A set A1 is 3.

次に、ポンプ等の機器で、そのハウジングB内で水又はオイル等の流体が収容される室内において吸入及び吐出が行われる部分で、圧力が正負のいずれにおいても、高い箇所と低い箇所とが存在する。ここで、正の圧力とは大気圧より高く、ハウジングBの内部の流体による内方から外方に向かう圧力のことをいう。 Next, in a device such as a pump, a portion where suction and discharge are performed in a room where a fluid such as water or oil is housed in the housing B, where the pressure is high or low regardless of whether the pressure is positive or negative. exist. Here, the positive pressure is higher than the atmospheric pressure and means the pressure from the inside to the outside due to the fluid inside the housing B.

また、負の圧力とは大気圧より低く、ハウジングBの外方から内方に向かう圧力のことをいう。負の圧力がかかる原因としては寒冷地等で流体が冷えることで収縮し体積が減少する過程で生じるものである。また、ポンプでは吐出ポート付近でハウジングBの内方から外方に向かう圧力がかかることもある。 Further, the negative pressure is lower than the atmospheric pressure and means the pressure from the outside to the inside of the housing B. The cause of the negative pressure is that it occurs in the process of shrinking and reducing the volume due to the cooling of the fluid in a cold region or the like. Further, in the pump, pressure may be applied from the inside to the outside of the housing B near the discharge port.

ハウジングB内において、流体の圧力の正負の度合い又は程度が他の領域と比較して相対的に大きい圧力の箇所が存在する。つまり、流体の圧力が正負いずれにおいても、最も大きい箇所が存在する。そして、この相対的に大きい圧力の箇所によって、該ハウジングBに装着される本発明のパッキンAについても、その長手方向に沿ってかかる圧力が大きい領域と、小さい領域とが存在する。そのため、パッキンAにおいても、圧力が特に大きくかかる領域と、通常の圧力がかかる領域に応じて、それぞれの領域に含まれる組A1の構成を変化させることができる。この構成には、以下の実施形態が存在する。 In the housing B, there is a pressure point where the positive / negative degree or degree of the fluid pressure is relatively large as compared with other regions. That is, there is a place where the pressure of the fluid is the largest regardless of whether the pressure is positive or negative. Further, depending on the location of the relatively large pressure, the packing A of the present invention mounted on the housing B also has a region where the pressure applied is large and a region where the pressure is small along the longitudinal direction thereof. Therefore, also in the packing A, the configuration of the set A1 included in each region can be changed according to the region where the pressure is particularly large and the region where the normal pressure is applied. The following embodiments exist in this configuration.

まず、パッキンAにおいて、長手方向に沿う他の領域と比較して相対的に大きい正の圧力の高圧受領域内に位置する組A1における外側倒れ防止部3のそれぞれの間隔は他の領域の組A1における外側倒れ防止部3のそれぞれの間隔よりも狭くされる構成としたものである〔図8(A)参照〕。ここで、前述したパッキンAにおける長手方向に沿う他の領域とは、正負いずれにおいても最も高い圧力が掛かる領域以外の領域と解釈してもよく、大気圧程度の圧力である。 First, in the packing A, the distance between the outer fall prevention portions 3 in the set A1 located in the high-pressure receiving region of the positive pressure, which is relatively large compared to the other regions along the longitudinal direction, is the set A1 in the other region. It is configured to be narrower than the distance between the outer fall prevention portions 3 in the above [see FIG. 8 (A)]. Here, the other region along the longitudinal direction in the packing A described above may be interpreted as a region other than the region where the highest pressure is applied in both positive and negative directions, and is a pressure of about atmospheric pressure.

パッキンAにおける他の領域と比較して相対的に大きい正の圧力の領域の組A1における複数の外側倒れ防止部3の間隔を狭くすることにより、高圧受領域内の組A1自体が長手方向に短くなり、高圧受領域内により多くの数の組A1を設けることができ、高圧に対する抵抗力を強化できる。この実施形態では、高圧受領域における組A1の外側倒れ防止部3の数を3とし、その間隔は、他の領域の組A1における外側倒れ防止部3同士の間隔よりも狭く(小さく)した。この実施形態では、特にハウジングBの高圧受領域で、外側倒れ防止部3同士の間隔を狭くしたことで、極めて強固にパッキン本体1の上部11の倒れを防止できる。 By narrowing the distance between the plurality of outer fall prevention portions 3 in the set A1 of the positive pressure region relatively large compared to the other regions in the packing A, the set A1 itself in the high pressure receiving region is shortened in the longitudinal direction. Therefore, a larger number of sets A1 can be provided in the high voltage receiving region, and the resistance to high voltage can be strengthened. In this embodiment, the number of the outer fall prevention portions 3 of the set A1 in the high-voltage receiving region is set to 3, and the interval thereof is narrower (smaller) than the interval between the outer fall prevention portions 3 in the set A1 in the other region. In this embodiment, especially in the high-voltage receiving region of the housing B, by narrowing the distance between the outer fall prevention portions 3, the upper portion 11 of the packing body 1 can be prevented from falling extremely strongly.

次に、パッキンAの長手方向に沿う高圧受領域内に位置する組A1における内側倒れ防止部2に対する外側倒れ防止部3の個数の割合(比率)は他の領域の組A1における内側倒れ防止部2に対する外側倒れ防止部3の個数の割合(比率)よりも高くする構成としたものである〔図8(B)参照〕。つまり、高圧受領域の組A1における外側倒れ防止部3の数を他の領域の組A1における外側倒れ防止部3の個数よりも多くした構成である。 Next, the ratio (ratio) of the number of outer fall prevention portions 3 to the inner fall prevention portion 2 in the set A1 located in the high-voltage receiving region along the longitudinal direction of the packing A is the inner fall prevention portion 2 in the set A1 in the other region. It is configured to be higher than the ratio (ratio) of the number of the outer fall prevention portions 3 to the outside [see FIG. 8 (B)]. That is, the number of the outer fall prevention portions 3 in the set A1 in the high-voltage receiving region is larger than the number of the outer fall prevention portions 3 in the set A1 in the other region.

この実施形態では、高圧受領域内での各組A1における外側倒れ防止部3の数を4とし、他の領域における組A1の外側倒れ防止部3の数は3とした。この実施形態では、高圧受領域の組A1における外側倒れ防止部3の数が他の領域の組A1における外側倒れ防止部3の数よりも多くなり、ハウジングBの流体による内方から外方に向かう大きな圧力に対して、多くの外側倒れ防止部3が圧力に抵抗してパッキン本体1の上部11の倒れを確実に防止できる。 In this embodiment, the number of outer fall prevention portions 3 in each set A1 in the high-voltage receiving region is 4, and the number of outer fall prevention portions 3 in the set A1 in the other regions is 3. In this embodiment, the number of outer fall prevention portions 3 in the set A1 in the high-pressure receiving region is larger than the number of outer fall prevention portions 3 in the set A1 in the other region, and the housing B is fluidized from the inside to the outside. With respect to the large pressure toward the outside, many outer fall prevention portions 3 resist the pressure and can surely prevent the upper portion 11 of the packing body 1 from falling.

次に、パッキンAの長手方向に沿う他の領域と比較して相対的に大きい負の低圧受領域内に位置する組A1における内側倒れ防止部2に対する外側倒れ防止部3の個数の割合(比率)は他の領域の組A1における内側倒れ防止部2に対する外側倒れ防止部3の個数の割合(比率)よりも低くしたものである〔図8(B),(C)参照〕。つまり、負の低圧受領域内の組A1における外側倒れ防止部3の数を他の領域の組A1における外側倒れ防止部3の個数よりも少なくした構成である。この実施形態では、負の低圧受領域内での各組A1における外側倒れ防止部3の数を2とし、他の領域における組A1の外側倒れ防止部3の数は3とした。 Next, the ratio (ratio) of the number of the outer fall preventing portions 3 to the inner fall preventing portions 2 in the set A1 located in the negative low voltage receiving region which is relatively large compared to the other regions along the longitudinal direction of the packing A. Is lower than the ratio (ratio) of the number of the outer fall preventing portions 3 to the inner fall preventing portions 2 in the set A1 of the other regions [see FIGS. 8 (B) and 8 (C)]. That is, the number of outer fall prevention portions 3 in the set A1 in the negative low voltage receiving region is smaller than the number of outer fall prevention portions 3 in the set A1 in the other region. In this embodiment, the number of outer fall prevention portions 3 in each set A1 in the negative low voltage receiving region is 2, and the number of outer fall prevention portions 3 in the set A1 in the other regions is 3.

この実施形態において、特に組A1の外側倒れ防止部3の長手方向における寸法を内側倒れ防止部2の長手方向における寸法より短くすることがある〔図8(C)参照〕。この実施形態では、外側倒れ防止部3の長手方向の長さを内側倒れ防止部2の長手方向の長さの略半分としたものである。この実施形態では、組A1の長手方向に沿う範囲の長さを小さくすることができ、したがって、負の低圧受領域内における組A1の配列数を実質的に増加でき、負圧によるパッキン本体1の上部11の内周側への倒れに対して内側倒れ防止部2が有効に働いて防止することができる。 In this embodiment, in particular, the dimension in the longitudinal direction of the outer fall prevention portion 3 of the set A1 may be shorter than the dimension in the longitudinal direction of the inner fall prevention portion 2 [see FIG. 8C]. In this embodiment, the length of the outer fall prevention portion 3 in the longitudinal direction is substantially half the length of the inner fall prevention portion 2 in the longitudinal direction. In this embodiment, the length of the range along the longitudinal direction of the set A1 can be reduced, and therefore the number of sequences of the set A1 in the negative low pressure receiving region can be substantially increased, and the packing body 1 due to the negative pressure can be substantially increased. The inner fall prevention unit 2 effectively works to prevent the upper portion 11 from falling toward the inner peripheral side.

ハウジングBは、ハウジング本体5とカバー板6とから構成される(図7参照)。本発明において、ハウジングBは、ポンプ,エンジン,ミッション等の水,オイル等の流体を有する機器に使用されるものである。ハウジング本体5とカバー板6の何れか一方には、パッキンAが挿入配置される溝7が形成され、パッキンAと同等形状の環状に形成される〔図7(A)参照〕。 The housing B is composed of a housing body 5 and a cover plate 6 (see FIG. 7). In the present invention, the housing B is used for equipment having a fluid such as water and oil such as a pump, an engine and a mission. A groove 7 into which the packing A is inserted is formed in either the housing main body 5 or the cover plate 6, and is formed in an annular shape having the same shape as the packing A [see FIG. 7 (A)].

溝7の幅方向長さは、パッキンAの下部12の長手方向に直交する断面の幅方向と略同等又は0.数ミリ大きい。また、下部12において幅方向両側の外れ止め部4,4を含めた幅方向寸法よりも小さく設定される。以上の説明において、溝7はハウジング本体5に形成されるものとしたが、溝7がカバー板6に形成されることもある。また、溝7は、底面部から開口上端面に向かうに従い幅方向寸法が次第に広くなるように両側壁面にテーパを有する逆台形状又は断面略有底V字形状に形成されている。 The length of the groove 7 in the width direction is substantially equal to or larger than the width direction of the cross section orthogonal to the longitudinal direction of the lower portion 12 of the packing A by a few millimeters. Further, the lower portion 12 is set to be smaller than the width direction dimension including the retaining portions 4 and 4 on both sides in the width direction. In the above description, the groove 7 is formed in the housing main body 5, but the groove 7 may be formed in the cover plate 6. Further, the groove 7 is formed in an inverted trapezoidal shape having tapers on both side walls or a substantially bottomed V-shape in cross section so that the dimension in the width direction gradually widens from the bottom surface portion toward the upper end surface of the opening.

A…パッキン、A1…組、1…パッキン本体、2…内側倒れ防止部、
3…外側倒れ防止部、4…外れ止め部B…ハウジング、5…ハウジング本体、
6…カバー板、7…溝。
A ... packing, A1 ... set, 1 ... packing body, 2 ... inside fall prevention part,
3 ... Outer fall prevention part, 4 ... Retaining part B ... Housing, 5 ... Housing body,
6 ... cover plate, 7 ... groove.

Claims (5)

長手方向に環状としてなるパッキン本体と内側倒れ防止部と外側倒れ防止部と外れ止め部とを備え、前記パッキン本体の幅方向の外周側には適宜の間隔をおいて複数の前記外側倒れ防止部が形成され、複数の該外側倒れ防止部が所定数連続する範囲内において内周側には1個の前記内側倒れ防止部が形成され、1個の該内側倒れ防止部と複数の前記外側倒れ防止部とが組として構成され、該組が前記パッキン本体の長手方向に多数設けられてなると共に、前記外れ止め部は前記パッキン本体の幅方向両側に設けられ、長手方向に沿う他の領域と比較して相対的に大きい正の圧力を受ける高圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも高くする構成とし、前記パッキン本体の長手方向に沿って、前記内側倒れ防止部とは同一の位置とはならないように前記外側倒れ防止部が設けられてなることを特徴とするパッキン。 It is provided with a packing body that is annular in the longitudinal direction, an inner fall prevention part, an outer fall prevention part, and a detachment prevention part. Is formed, and one inner fall prevention portion is formed on the inner peripheral side within a range in which a predetermined number of the outer fall prevention portions are continuous, and one inner fall prevention portion and a plurality of outer fall prevention portions are formed. The preventive portions are configured as a set, and a large number of the sets are provided in the longitudinal direction of the packing body, and the retaining portions are provided on both sides in the width direction of the packing body, and are provided with other regions along the longitudinal direction. The ratio of the number of outer fall prevention portions in the set located in the high-pressure receiving region that receives a relatively large positive pressure is higher than the ratio of the number of outer fall prevention portions in the set in other regions. The packing is characterized in that the outer fall prevention portion is provided along the longitudinal direction of the packing body so as not to be at the same position as the inner fall prevention portion. 長手方向に環状としてなるパッキン本体と内側倒れ防止部と外側倒れ防止部と外れ止め部とを備え、前記パッキン本体の幅方向の外周側には適宜の間隔をおいて複数の前記外側倒れ防止部が形成され、複数の該外側倒れ防止部が所定数連続する範囲内において内周側には1個の前記内側倒れ防止部が形成され、1個の該内側倒れ防止部と複数の前記外側倒れ防止部とが組として構成され、該組が前記パッキン本体の長手方向に多数設けられてなると共に、前記外れ止め部は前記パッキン本体の幅方向両側に設けられ、長手方向に沿う他の領域と比較して相対的に大きい負の圧力を受ける低圧受領域内に位置する前記組における前記外側倒れ防止部の個数の割合は他の領域の前記組における前記外側倒れ防止部の個数の割合よりも低くする構成とし、前記パッキン本体の長手方向に沿って、前記内側倒れ防止部とは同一の位置とはならないように前記外側倒れ防止部が設けられてなることを特徴とするパッキン。 It is provided with a packing body that is annular in the longitudinal direction, an inner fall prevention part, an outer fall prevention part, and a detachment prevention part. Is formed, and one inner fall prevention portion is formed on the inner peripheral side within a range in which a predetermined number of the outer fall prevention portions are continuous, and one inner fall prevention portion and a plurality of outer fall prevention portions are formed. The preventive portions are configured as a set, and a large number of the sets are provided in the longitudinal direction of the packing body, and the retaining portions are provided on both sides in the width direction of the packing body, and are provided with other regions along the longitudinal direction. The ratio of the number of outer fall prevention portions in the set located in the low-voltage receiving region that receives a relatively large negative pressure is lower than the ratio of the number of outer fall prevention portions in the set in other regions. The packing is characterized in that the outer fall prevention portion is provided along the longitudinal direction of the packing body so as not to be at the same position as the inner fall prevention portion. 請求項1又は2に記載のパッキンにおいて、幅方向両側の前記外れ止め部は、前記組の間に位置してなることを特徴とするパッキン。 The packing according to claim 1 or 2, wherein the retaining portions on both sides in the width direction are located between the sets. 請求項2に記載のパッキンにおいて、負の前記低圧受領域内での各前記組における前記外側倒れ防止部の個数は2としてなることを特徴とするパッキン。 The packing according to claim 2 , wherein the number of the outer fall prevention portions in each of the sets in the negative low voltage receiving region is 2. 請求項1,2,3又は4の何れか1項に記載のパッキンにおいて、前記パッキン本体は、長手方向に直交する断面の高さ方向で且つ頂部に向かうに従い次第に狭い幅となる上部と該上部の下端と同等幅以上となる下部とを有し、前記内側倒れ防止部と前記外側倒れ防止部とは前記上部に形成され、前記外れ止め部は前記下部に形成されてなることを特徴とするパッキン。 In the packing according to any one of claims 1, 2, 3 or 4 , the packing main body has an upper portion and an upper portion thereof that gradually become narrower in the height direction of a cross section orthogonal to the longitudinal direction and toward the top. It is characterized in that it has a lower portion having a width equal to or larger than the lower end thereof, the inner fall prevention portion and the outer fall prevention portion are formed in the upper portion, and the retaining portion is formed in the lower portion. rubber seal.
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