【発明の詳細な説明】[Detailed description of the invention]
この発明は、パツキンやガスケツトに適用さ
れ、優れた密封機能を発揮できる密封部材に関す
るものである。
一般にこの種の密封部材としては、石綿等の繊
維を主材料として、これに適当な含浸材料を配合
したものや、シート状金網の片面或いは両面にシ
ート状パツキン素材を積層したもの等がある。し
かしながら、例えば繊維を主材料とした密封部材
では、充填材料が流出しやすくまた、形くずれ等
が生じやすい欠点があり、また前記した積層タイ
プのものでは、所望の形状となすための屈曲性に
かけ、さらには、構成する素材間の剥離、分離し
やすい欠点があつた。
本発明は係る事情に鑑みなされたものであつ
て、パツキンやガスケツトとして供せられた場
合、復元性、衝撃性、形くずれ等に対し、極めて
優れた特性をもつた密封部材を提供するものであ
る。
以下、この発明を詳細に説明する。
本発明では、金属線を交絡状態にて編みあげ、
断面を輪状となした長尺状の金網に、仕様目的に
応じた目詰め材を充填させた構成となす密封部材
である。そして、この場合、金属線としては線径
0.05mmφ〜0.2mmφが好ましく、線径が0.05mmφ未
満になれば、金属線としての機械的強度が低下し
て、負荷の生じるパツキン等に供せられた場合、
破断、破損等の現象を生じる。また逆に線径が
0.2mmφを超えると、剛直傾向となり金網に形成
したとき屈曲性に欠け、密封部材として金網によ
る弊害が逆に発生しやすくなる。また、金属線の
材料としては、ステンレス線、銅線、モネル線等
を使用目的に応じて用いればよいものである。こ
のような金属線を交絡状態にて編んだ金網となす
ものであるが、好ましい交絡状態は、シームレス
の断面輪状となるニツト編みにて長尺となした金
網がよい。そして係る金網に充填する目詰め材と
しては、黒鉛粉末或いは弗素樹脂粉末からなる粉
末と、石綿繊維とを混合した粘性材を用いるもの
である。
尚、以下に本発明の好適な実施例を示す。
実施例
第１図に示したように、１は金網であつて、線
径0.15mmφのステンレス線をニツト編にして密封
部材３が略楕円形断面の帯状となすために断面が
35mmφの輪状となした長さ30cmの金網内に、黒鉛
と石綿繊維とを混ぜた粘性材を目詰め材２として
金網に充填させた。係る密封部材３をガスケツト
として２インチ用フランジに挾持し、20Kg/cm2圧
力のチツ素ガスを負荷させた結果、浅れは全くな
く、目詰め材の流出もほとんどなかつた。
応用例
上記実施例で得た密封部材３を、第２図に示す
如く、うず巻状に数回巻上げ、第３図で示した如
く、断面形状がイ，ロ，ハ等の所望する形の環状
密封部材となすこともできる。
そしてこのようになした環状密封部材を例え
ば、第４図で示した管継手部に用いることもでき
る。そして第４図の矢印Ａのような振動を受けて
も、環状密封部材の先端部Ｂが、隙間からのはみ
出しや、形くずれを生じることが全くない。つま
り、弾性に富む構成となした金網が補強剤として
の役割と、目詰め材の流出防止の役割を完全には
たすことができるためである。
実験例
第４図の記号イで示す断面形状になした環状密
封部材として、下表の表−１に示した仕様にて試
作品を３種類製作した。
The present invention relates to a sealing member that can be applied to packings and gaskets and exhibits excellent sealing functions. In general, this type of sealing member includes one that is mainly made of fibers such as asbestos and mixed with an appropriate impregnated material, and one that is made of a sheet-shaped wire mesh with a sheet-shaped packing material laminated on one or both sides. However, sealing members made mainly of fibers, for example, have the disadvantage that the filling material tends to flow out and the shape is easily distorted, and the laminated type mentioned above has the disadvantage that it is difficult to bend the material to form the desired shape. Furthermore, there was a drawback that the constituent materials were likely to peel and separate. The present invention has been made in view of the above circumstances, and provides a sealing member that has extremely excellent properties against restorability, impact resistance, deformation, etc. when used as a packing or gasket. be. This invention will be explained in detail below. In the present invention, metal wires are knitted in an intertwined state,
This is a sealing member constructed by filling a long wire mesh with a ring-shaped cross section with a filling material according to the intended purpose. In this case, the metal wire has a wire diameter of
0.05mmφ to 0.2mmφ is preferable, and if the wire diameter is less than 0.05mmφ, the mechanical strength as a metal wire will decrease, and when used in packings etc. where loads are generated,
This causes phenomena such as breakage and damage. Conversely, the wire diameter
If it exceeds 0.2 mmφ, it tends to be rigid and lacks flexibility when formed into a wire mesh, and adverse effects caused by the wire mesh as a sealing member are likely to occur. Further, as the material of the metal wire, stainless steel wire, copper wire, monel wire, etc. may be used depending on the purpose of use. A wire mesh is made by knitting such metal wires in an intertwined state, but the preferred intertwined state is a wire mesh knitted into a long length with a seamless ring-like cross section. The filling material used to fill the wire mesh is a viscous material that is a mixture of graphite powder or fluororesin powder and asbestos fibers. Incidentally, preferred embodiments of the present invention will be shown below. Embodiment As shown in FIG. 1, 1 is a wire mesh made of knitted stainless steel wire with a diameter of 0.15 mm, and the sealing member 3 has a substantially elliptical cross section.
A viscous material mixed with graphite and asbestos fibers was filled into the wire mesh as a filling material 2 in a wire mesh having a ring shape of 35 mmφ and a length of 30 cm. When the sealing member 3 was held as a gasket on a 2-inch flange and nitrogen gas was loaded at a pressure of 20 kg/cm 2 , there was no shallowing and almost no filling material leaked out. Application Example The sealing member 3 obtained in the above example is wound several times into a spiral shape as shown in FIG. It can also be an annular sealing member. The annular sealing member thus constructed can also be used, for example, in the pipe joint shown in FIG. Even when subjected to vibrations as indicated by arrow A in FIG. 4, the tip B of the annular sealing member never protrudes from the gap or loses its shape. In other words, the highly elastic wire mesh can completely fulfill the role of a reinforcing agent and the role of preventing the filling material from flowing out. Experimental Example Three types of prototypes were manufactured as annular sealing members having the cross-sectional shape shown by symbol A in Fig. 4 according to the specifications shown in Table 1 below.
【表】
そしてこの３種類の試作品を各々、密封流体と
して窒素ガス（H2）、密封流体圧力として0.2、
0.3、0.4、0.5の４段階（圧力単位は何れもKgf/cm2
Ｇ）に分け密封試験を行なつた。なお、この密封
試験は、自動車の排気管用を意図して行なつたの
で、雰囲気温度は80℃に保持し、洩れ量はフロー
ト式流量計にて測定した。密封試験結果は表−２
に示す。[Table] For each of these three types of prototypes, nitrogen gas (H 2 ) was used as the sealing fluid, 0.2 was used as the sealing fluid pressure,
4 levels of 0.3, 0.4, 0.5 (all pressure units are Kgf/cm 2
A sealing test was conducted for G). Since this sealing test was conducted with the intention of using the product in an automobile exhaust pipe, the ambient temperature was maintained at 80° C., and the amount of leakage was measured using a float type flowmeter. Sealing test results are shown in Table 2.
Shown below.
【表】
（注）表中の数値は洩れ量（単位c.c.／分）であ
る。このように表−２を観察すれば、液体
と異なり封止が困難される気体（N2ガ
ス）を密封流体として用いているにもかか
わらず、本発明品ととは、比較品に較
べて良好な結果を示した。なお本発明品
との場合、比較品が圧力上昇に伴なつて
洩れ量が多くなつているにもかかわらず、
ほぼ一定値を示している。このことは、本
発明品ととが、石綿繊維と粉末（黒鉛
粉末或いは弗素樹脂粉末）とを混合した粘
性材の目詰材を充填しているため石綿繊維
による新和生と物理的吸着力（フアンデル
ワルス力）によつて該粉末の保持力を保つ
ためと、金網に充填された目詰材としての
保持力と目詰の役をはたしているためであ
る。比較品の場合、グラフアイトのみなの
で、目詰めが不充分となりやすくしかも圧
力上昇に伴なつて、金網の目から流出する
現象みられた。この実験では密封流体に流
速を与えなかつたが、例えば排気ガス等で
は、ガス流速に変動があるため、本発明品
（、）と比較品との差はより顕著に生
じるとのと推量される。
以上、詳述したように、本発明に係る密封部材
は、金属線として、線径が0.05mmφ〜0.2mmφで
ある金属線をニツト編みにて交絡状態に編みあげ
た断面輪状の金網なので密封部材としての適度な
屈曲性と強度をかね備え、前記粘性材からなる目
詰め材をこの金網内へ一担充填すれば、ニツト編
みによる交絡状態の金網によつて適度な保持性が
保たれるだけでなく、粘性材からなる目詰め材
は、無定形なので、所望する形の環状密封部材と
なしやすい。しかも構成する素材間の剥離現象等
は一切解消される。さらに、この密封部材は、金
網によつて、形くずれ防止と部分的な千切れや破
損が防げる。また復元性と振動性に優れている。[Table] (Note) The values in the table are leakage amounts (unit: cc/min). Looking at Table 2 in this way, it can be seen that although the sealing fluid is a gas ( N2 gas) that is difficult to seal unlike a liquid, the product of the present invention has a lower sealing capacity than the comparative product. It showed good results. In the case of the product of the present invention, even though the comparative product leaks more as the pressure increases,
It shows almost constant value. This is because the products of the present invention are filled with a viscous plugging material that is a mixture of asbestos fibers and powder (graphite powder or fluororesin powder), so the new growth and physical adsorption power of asbestos fibers are reduced. This is because it maintains the holding power of the powder due to (Vanderwals force), and also because it serves as a holding power and clogging function as a plugging material filled in the wire gauze. In the case of the comparative product, since it was made only of graphite, the packing was likely to be insufficient, and moreover, as the pressure rose, a phenomenon was observed in which it flowed out from the mesh of the wire mesh. In this experiment, no flow velocity was applied to the sealed fluid, but for example, in exhaust gas, etc., the gas flow velocity fluctuates, so it is assumed that the difference between the inventive product (,) and the comparative product would be more pronounced. . As described above in detail, the sealing member according to the present invention has a ring-shaped cross section made by knitting metal wires having a wire diameter of 0.05 mmφ to 0.2 mmφ in an intertwined state. If the meshing material made of the above-mentioned viscous material is filled into this wire mesh once, the wire mesh in an intertwined state by knitting can maintain an appropriate retention property. Instead, since the plugging material made of a viscous material is amorphous, it can be easily formed into an annular sealing member of a desired shape. Furthermore, any peeling phenomenon between the constituent materials is completely eliminated. Furthermore, the wire mesh prevents the sealing member from deforming and preventing partial tearing or damage. It also has excellent restorability and vibration resistance.
【図面の簡単な説明】[Brief explanation of the drawing]
図面は何れも本発明の密封部材に係り、第１図
は、密封部材の斜視図、第２図は第１図の密封部
を巻いた状態を示す斜視図、第３図のイ，ロ，ハ
の各図は、第２図のものを各種の断面形状に成形
したときの半断面図、第４図は、第３図のイ図の
ものを管継手に適用したときの断面図である。
１……金網、２……目詰め材、３……密封部
材。
The drawings all relate to the sealing member of the present invention, and FIG. 1 is a perspective view of the sealing member, FIG. 2 is a perspective view showing the sealed portion of FIG. 1 in a rolled state, and FIG. Each figure in C is a half-sectional view of the thing in Figure 2 when it is molded into various cross-sectional shapes, and Figure 4 is a cross-sectional view when the thing in Figure A in Figure 3 is applied to a pipe joint. . 1... wire mesh, 2... filling material, 3... sealing member.