JP2783784B2 - Manufacturing method of connection fittings for pressure-resistant hoses - Google Patents
Manufacturing method of connection fittings for pressure-resistant hosesInfo
- Publication number
- JP2783784B2 JP2783784B2 JP8133915A JP13391596A JP2783784B2 JP 2783784 B2 JP2783784 B2 JP 2783784B2 JP 8133915 A JP8133915 A JP 8133915A JP 13391596 A JP13391596 A JP 13391596A JP 2783784 B2 JP2783784 B2 JP 2783784B2
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- fitting
- pressure
- cylinder
- resistant hose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、流体が移送される
耐圧ホースを機器に接続する耐圧ホース用接続金具の製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a fitting for a pressure-resistant hose for connecting a pressure-resistant hose to which a fluid is transferred to equipment.
【0002】[0002]
【従来の技術】図9は、従来の耐圧ホース用接続金具1
の断面図である。耐圧ホース用接続金具1は、たとえば
給油装置などの機器に耐圧ホースを接続する場合に用い
られる。たとえば合成ゴムから成る耐圧ホースには移送
される流体によって最大で70kgf/cm2程度の圧
力が作用するため、耐圧ホース用接続金具1はこのよう
な大きな圧力が作用したとしても耐圧ホースが容易に抜
出さないように、図9に示されるように内筒15と外筒
16とを備え、これらの内筒15と外筒16との間に耐
圧ホースを嵌め込み内筒15と外筒16とによって耐圧
ホースを挟持する。これによって耐圧ホースが容易に抜
出すことを防止している。2. Description of the Related Art FIG. 9 shows a conventional fitting 1 for a pressure-resistant hose.
FIG. The pressure-resistant hose connection fitting 1 is used, for example, when connecting a pressure-resistant hose to a device such as an oil supply device. For example, since a pressure of up to about 70 kgf / cm 2 acts on the pressure-resistant hose made of synthetic rubber due to the fluid to be transferred, the pressure-resistant hose fitting 1 can easily be formed even when such a large pressure is applied. As shown in FIG. 9, an inner tube 15 and an outer tube 16 are provided so as not to be pulled out, and a pressure-resistant hose is fitted between the inner tube 15 and the outer tube 16 so that the inner tube 15 and the outer tube 16 Hold the pressure hose. This prevents the pressure hose from being easily pulled out.
【0003】耐圧ホース用接続金具1の基端部には螺合
部17が形成され、この螺合部17は接続されるべき機
器に螺合して固定される。[0003] A threaded portion 17 is formed at the base end of the pressure-resistant hose fitting 1, and the threaded portion 17 is screwed and fixed to a device to be connected.
【0004】このような耐圧ホース用接続金具1の内筒
15と外筒16との間から移送される流体が漏れること
は禁物である。したがって漏れを防止するために耐圧ホ
ース用接続金具を、たとえば削出しによって一体形成し
ようとする場合には、内筒15と外筒16との間の空間
が非常に狭いので、削出しによる形成は非常に困難であ
る。したがって図9に示されるように、耐圧ホース用接
続金具1は内筒15と外筒16とを個別に形成し、外筒
16に内筒15を挿入して固定することによって形成さ
れる。[0004] It is inevitable that the fluid transferred from between the inner cylinder 15 and the outer cylinder 16 of such a pressure-resistant hose fitting 1 is leaked. Therefore, when the connection fitting for a pressure-resistant hose is to be integrally formed by cutting, for example, in order to prevent leakage, the space between the inner tube 15 and the outer tube 16 is very narrow. Very difficult. Therefore, as shown in FIG. 9, the connection fitting 1 for a pressure-resistant hose is formed by separately forming the inner tube 15 and the outer tube 16 and inserting and fixing the inner tube 15 to the outer tube 16.
【0005】内筒15は、耐圧ホースが外側に嵌まり込
む略円筒状のホース接続部18の軸線方向一端部に、ホ
ース接続部18よりも大径の大径部19が同軸に形成さ
れ、外筒16は、耐圧ホースが内側に嵌まり込む略円筒
状のホース嵌入部20の軸線方向一端部に、内筒の前記
大径部19の外径よりも僅かに大径の内径を有する内筒
嵌合部21が形成される。外筒16は螺合部17を有す
る。このような外筒16の内筒嵌合部21に、内筒15
の大径部19を嵌合させた後、内筒15の大径部19と
外筒16の内筒嵌合部21との接続部は、たとえば銀ろ
う22によって周方向全周にわたって溶接によって固定
される。このように内筒15と外筒16とは溶接によっ
て確実に固定されるので、内筒15と外筒16との間か
ら移送流体が漏出すといったことが防がれる。The inner cylinder 15 has a large-diameter portion 19 having a larger diameter than the hose connection portion 18 formed coaxially at one axial end of a substantially cylindrical hose connection portion 18 into which a pressure-resistant hose is fitted. The outer cylinder 16 has an inner diameter slightly larger than the outer diameter of the large diameter portion 19 of the inner cylinder at one axial end of a substantially cylindrical hose fitting portion 20 into which the pressure-resistant hose is fitted. A tube fitting portion 21 is formed. The outer cylinder 16 has a screw portion 17. The inner cylinder fitting portion 21 of the outer cylinder 16 has the inner cylinder 15
After the large-diameter portion 19 of the inner cylinder 15 is fitted, the connection between the large-diameter portion 19 of the inner cylinder 15 and the inner cylinder fitting portion 21 of the outer cylinder 16 is fixed by welding, for example, with a silver braze 22 over the entire circumferential direction. Is done. In this way, the inner cylinder 15 and the outer cylinder 16 are securely fixed by welding, so that the transfer fluid is prevented from leaking from between the inner cylinder 15 and the outer cylinder 16.
【0006】[0006]
【発明が解決しようとする課題】内筒15と外筒16と
の間の環状空間は耐圧ホースを挟持できるように3〜6
mm程度の幅しかなく、内筒15と外筒16とを溶接に
よって固定する場合には、このような狭い環状空間から
溶接しなければならない。さらに溶接するときには熱が
外に逃げないように外筒を加熱しながら溶接しなければ
ならないので、溶接作業が極めて困難で、生産性が悪い
という問題が生じる。The annular space between the inner cylinder 15 and the outer cylinder 16 is 3-6 so as to hold the pressure-resistant hose.
When the inner cylinder 15 and the outer cylinder 16 are fixed to each other by welding, they must be welded from such a narrow annular space. Further, when welding, welding must be performed while heating the outer cylinder so that heat does not escape to the outside. Therefore, there is a problem that welding work is extremely difficult and productivity is poor.
【0007】また溶接によって内筒15と外筒16とを
固定した場合には、溶接する際の熱によってスケールが
生成し、美観が低下するので、このスケールを酸によっ
て洗浄し除去しなければならず、さらに生産性が劣ると
いう問題が生じる。また溶接によって固定する場合に
は、線膨張係数の異なる異種金属同士や、ステンレス鋼
の溶接は困難であるので、内筒15と外筒16の材料が
限定されるという問題が生じる。When the inner tube 15 and the outer tube 16 are fixed by welding, scale is generated by heat at the time of welding, and the aesthetic appearance is deteriorated. Therefore, the scale must be washed and removed with an acid. In addition, there is a problem that productivity is further deteriorated. Further, in the case of fixing by welding, it is difficult to weld different metals having different linear expansion coefficients or stainless steel, so that there is a problem that the material of the inner cylinder 15 and the outer cylinder 16 is limited.
【0008】このように内筒15と外筒16とを溶接に
よって固定する耐圧ホース用接続金具1の製造方法に代
えて、ねじによって内筒15と外筒16とを固定する耐
圧ホース用接続金具25の製造方法がある。As described above, instead of the method of manufacturing the pressure-resistant hose connection fitting 1 for fixing the inner tube 15 and the outer tube 16 by welding, a connection tube for the pressure-resistant hose fixing the inner tube 15 and the outer tube 16 with screws. There are 25 manufacturing methods.
【0009】図10は、耐圧ホース用接続金具25を示
す断面図である。なお耐圧ホース用接続金具25は図9
に示される耐圧ホース用接続金具1と同様の構成には同
一の参照符号を付し、説明を省略する。内筒15の大径
部19の外周には外ねじ26が形成され、外筒16の内
筒嵌合部21の内周には前記外ねじ26に螺合する内ね
じ27が形成される。内筒15と外筒16とは外ねじ2
6と内ねじ27との間に接着剤を介在させ、外ねじ26
に内ねじ27を螺合させることによって、外筒16に内
筒15は固定される。このようにして内筒15と外筒1
6とはねじおよび接着剤によって固定されるが、このよ
うなねじによる固定では、溶接による固定に比べて液密
性において信頼性が劣るという問題が生じる。FIG. 10 is a sectional view showing a connection fitting 25 for a pressure-resistant hose. The connection fitting 25 for the pressure-resistant hose is shown in FIG.
The same components as those of the pressure-resistant hose connection fitting 1 shown in FIG. An outer screw 26 is formed on the outer periphery of the large diameter portion 19 of the inner cylinder 15, and an inner screw 27 that is screwed to the outer screw 26 is formed on the inner circumference of the inner cylinder fitting portion 21 of the outer cylinder 16. The inner cylinder 15 and the outer cylinder 16 are externally threaded 2
6 between the inner screw 27 and the outer screw 26.
The inner cylinder 15 is fixed to the outer cylinder 16 by screwing the inner screw 27 to the outer cylinder 16. Thus, the inner cylinder 15 and the outer cylinder 1
6 is fixed by a screw and an adhesive, but fixing with such a screw causes a problem that reliability is lower in liquid tightness than fixing by welding.
【0010】したがって本発明の目的は、内筒と外筒と
を容易にかつ確実に接続することを可能として生産性を
向上することができる耐圧ホース用接続金具の製造方法
を提供することである。[0010] Accordingly, an object of the present invention is to provide a method of manufacturing a pressure-resistant hose fitting that can easily and surely connect the inner cylinder and the outer cylinder and improve productivity. .
【0011】[0011]
【課題を解決するための手段】本発明は、耐圧ホースが
外側に嵌まり込む略円筒状のホース接続部の軸線方向一
端部に、ホース接続部よりも大径の大径部が同軸に形成
される内筒と、耐圧ホースが内側に嵌まり込む略円筒状
のホース嵌入部の軸線方向一端部に、内筒の前記大径部
が嵌まり込む内筒嵌合部が形成される外筒とを含む耐圧
ホース用接続金具の製造方法において、前記内筒嵌合部
の内径は内筒の大径部の外径よりも小径に形成され、内
筒が外筒に比べて低温の状態で内筒の大径部を外筒の内
筒嵌合部に嵌め込んだ後に常温に戻すことを特徴とする
耐圧ホース用接続金具の製造方法である。本発明に従え
ば、内筒の大径部が嵌まり込む外筒の内筒嵌合部の内径
は、内筒の大径部よりも小径に形成されているので、外
筒に内筒を組付ける場合に、内筒を外筒に比べて低温す
なわち内筒を常温よりも冷却して内筒の大径部を収縮さ
せるか、または外筒を常温よりも加熱して外筒の嵌合部
を膨張させた後に、外筒の内筒嵌合部に内筒の大径部を
嵌め込み、その後、常温に戻すことによって内筒の大径
部と外筒の内筒嵌合部とは圧着され、確実に固定され
る。なお、常温とは耐圧ホース用接続金具が実際に使用
されるときの温度であるので、ある程度の幅を持った値
となる。このように内筒と外筒とは容易にかつ確実に固
定されるので、生産性が向上する。また内筒と外筒とは
圧着されて固定されるので、溶接することが困難なステ
ンレス鋼または異種金属同士でも確実に固定することが
できる。このような耐圧ホース用接続金具は機器に固定
され、内筒と外筒との間に耐圧ホースを挿入して耐圧ホ
ースを挟持し、機器と耐圧ホースとを接続する。According to the present invention, a large-diameter portion having a larger diameter than the hose connection portion is formed coaxially at one axial end of a substantially cylindrical hose connection portion into which a pressure-resistant hose is fitted outside. An outer cylinder in which an inner cylinder fitting portion into which the large-diameter portion of the inner cylinder is fitted is formed at one axial end of a substantially cylindrical hose fitting portion into which the pressure-resistant hose is fitted inside. Wherein the inner diameter of the inner cylinder fitting portion is formed to be smaller than the outer diameter of the large diameter portion of the inner cylinder, and the inner cylinder has a lower temperature than the outer cylinder. A method for manufacturing a connection fitting for a pressure-resistant hose, characterized by returning the temperature to room temperature after fitting a large-diameter portion of an inner cylinder into an inner cylinder fitting portion of an outer cylinder. According to the present invention, the inner diameter of the inner cylinder fitting portion of the outer cylinder into which the large diameter portion of the inner cylinder fits is formed to have a smaller diameter than the large diameter portion of the inner cylinder. When assembling, the inner cylinder is cooled at a lower temperature than the outer cylinder, that is, the inner cylinder is cooled below room temperature to shrink the large diameter portion of the inner cylinder, or the outer cylinder is heated above room temperature to fit the outer cylinder. After expanding the part, the large-diameter part of the inner cylinder is fitted into the inner-tube fitting part of the outer cylinder, and then returned to room temperature to crimp the large-diameter part of the inner cylinder and the inner-tube fitting part of the outer cylinder. It is fixed securely. The normal temperature is a temperature at which the connection fitting for the pressure-resistant hose is actually used, and thus has a value having a certain width. As described above, the inner cylinder and the outer cylinder are easily and securely fixed, so that productivity is improved. Further, since the inner cylinder and the outer cylinder are press-bonded and fixed, even stainless steel or dissimilar metals, which are difficult to weld, can be reliably fixed. Such a fitting for a pressure-resistant hose is fixed to a device, and a pressure-resistant hose is inserted between an inner tube and an outer tube to sandwich the pressure-resistant hose and connect the device and the pressure-resistant hose.
【0012】また本発明の内筒の大径部の開口端には、
半径方向外方に突出する突条が周方向全周にわたって形
成され、外筒の内筒嵌合部には前記突条が嵌まり込む嵌
合溝が形成されることを特徴とする。本発明に従えば、
内筒の大径部には突条が形成され、外筒の内筒嵌合部に
は嵌合溝が形成されるので、外筒の内筒嵌合部に内筒の
大径部を圧着して固定したときに、内筒の前記突条が外
筒の嵌合溝に嵌まり込む。したがって、装着された耐圧
ホースが引っ張られるなどして外筒に引張力が作用した
としても、内筒の前記突条が外筒の嵌合溝に嵌まり込ん
でいるので内筒が外筒から抜出すといったことが確実に
防がれる。Further, at the open end of the large diameter portion of the inner cylinder of the present invention,
A ridge protruding radially outward is formed over the entire circumference, and a fitting groove into which the ridge is fitted is formed in the inner cylinder fitting portion of the outer cylinder. According to the present invention,
A protrusion is formed on the large diameter part of the inner cylinder, and a fitting groove is formed on the inner cylinder fitting part of the outer cylinder, so the large diameter part of the inner cylinder is crimped to the inner cylinder fitting part of the outer cylinder When fixed, the protrusion of the inner cylinder fits into the fitting groove of the outer cylinder. Therefore, even if the attached pressure-resistant hose is pulled or the like, and a pulling force acts on the outer cylinder, since the protrusion of the inner cylinder is fitted into the fitting groove of the outer cylinder, the inner cylinder is moved from the outer cylinder. Pulling out is reliably prevented.
【0013】また本発明の内筒の大径部の開口端には、
軸線方向に突出する嵌合凸部が形成され、外筒の内筒嵌
合部には、前記嵌合凸部が嵌合する嵌合凹所を有する段
差部が形成されることを特徴とする。本発明に従えば、
内筒と外筒とは、外筒の段差部の嵌合凹所に内筒の嵌合
凸部が嵌合した状態で、内筒の大径部の外周面と外筒の
内筒嵌合部の内周面、および嵌合凸部の外周面と嵌合凹
所が形成される段差部の内周面とが圧着した状態で内筒
と外筒とが固定される。したがって、内筒と外筒とは2
箇所で圧着されるので液密性が向上されて確実に固定さ
れる。Further, at the open end of the large diameter portion of the inner cylinder of the present invention,
A fitting protrusion protruding in the axial direction is formed, and a step portion having a fitting recess in which the fitting protrusion fits is formed in the inner cylinder fitting portion of the outer cylinder. . According to the present invention,
The inner cylinder and the outer cylinder are fitted with the outer peripheral surface of the large-diameter portion of the inner cylinder and the inner cylinder in a state in which the fitting projection of the inner cylinder is fitted in the fitting recess of the step portion of the outer cylinder. The inner cylinder and the outer cylinder are fixed in a state where the inner peripheral surface of the portion, the outer peripheral surface of the fitting convex portion, and the inner peripheral surface of the step portion in which the fitting recess is formed are crimped. Therefore, the inner cylinder and the outer cylinder are 2
Since it is pressure-bonded at a location, the liquid-tightness is improved and the liquid crystal is securely fixed.
【0014】また本発明の内筒嵌合部とには、内筒を外
筒に嵌合させた後に内側へ変形させて内筒の大径部を係
止する係止部が形成されることを特徴とする。本発明に
従えば、外筒の内筒嵌合部に内筒の大径部を嵌合させた
後、外筒に形成される係止部を内側に変形させて内筒を
係止するので、内筒に引張力が作用したとしても内筒は
前記係止部によって外筒から抜出すといったことが防が
れる。Further, the inner cylinder fitting portion of the present invention is formed with a locking portion for locking the large diameter portion of the inner cylinder by deforming the inner cylinder inward after fitting the inner cylinder to the outer cylinder. It is characterized by. According to the present invention, after the large diameter portion of the inner cylinder is fitted to the inner cylinder fitting portion of the outer cylinder, the locking portion formed on the outer cylinder is deformed inward to lock the inner cylinder. Even if a tensile force acts on the inner cylinder, the inner cylinder is prevented from being pulled out of the outer cylinder by the locking portion.
【0015】本発明の内筒の大径部には前記係止部の基
端部に臨んで凹んだ係止部用凹所が形成されることを特
徴とする。本発明に従えば、内筒には外筒に形成される
係止部の基端部に臨んで凹んだ係止部用凹所が形成され
るので、係止部を内側へ変形する際、係合部の基端部は
係止部用凹所に嵌まり込むので、係止部に無理な力が作
用せず、内筒の抜止めを確実に行うことができる。The large-diameter portion of the inner cylinder according to the present invention is characterized in that a recess for a locking portion which is recessed facing the base end of the locking portion is formed. According to the present invention, the inner cylinder is formed with a locking portion recess that is recessed toward the base end of the locking portion formed on the outer cylinder, so when the locking portion is deformed inward, Since the base end of the engaging portion fits into the locking portion recess, no excessive force acts on the locking portion, and the inner cylinder can be reliably prevented from being removed.
【0016】[0016]
【発明の実施の形態】図1は本発明の実施の第1形態で
ある耐圧ホース用接続金具30を示す断面図であり、図
2は耐圧ホース用接続金具30を示す斜視図であり、図
3は耐圧ホース用接続金具30の分解斜視図である。な
お、図3では外筒32は断面図で示してある。耐圧ホー
ス用接続金具30は、たとえば真鍮などの金属から成る
内筒31および外筒32から構成され、内筒31は耐圧
ホースが外側に嵌まり込む略円筒状のホース接続部33
の軸線方向一端部に、ホース接続部33よりも大径の大
径部34が同軸に形成される。ホース接続部33の外周
部には、複数の環状の突条39が形成され、ホース接続
部33に嵌まり込む耐圧ホースが抜止めされる。このホ
ース接続部33の軸線方向一端部は、拡開する連結部3
5を介して大径部34が連なって形成される。FIG. 1 is a sectional view showing a pressure-resistant hose connection fitting 30 according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing the pressure-resistant hose connection fitting 30. 3 is an exploded perspective view of the connection fitting 30 for a pressure-resistant hose. In FIG. 3, the outer cylinder 32 is shown in a sectional view. The pressure-resistant hose connection fitting 30 is composed of an inner cylinder 31 and an outer cylinder 32 made of metal such as brass, for example. The inner cylinder 31 has a substantially cylindrical hose connection portion 33 into which the pressure-resistant hose is fitted outside.
A large-diameter portion 34 having a larger diameter than the hose connection portion 33 is formed coaxially at one end in the axial direction. A plurality of annular ridges 39 are formed on the outer peripheral portion of the hose connection portion 33, and the pressure-resistant hose that fits into the hose connection portion 33 is prevented from coming off. One end of the hose connection portion 33 in the axial direction is connected to the connecting portion 3 which expands.
The large-diameter portion 34 is formed continuously with the intermediary of 5.
【0017】外筒32は、耐圧ホースが内側に嵌まり込
む略円筒状のホース嵌入部の軸線方向一端部に、内筒3
1の前記大径部34の外径D2よりも小径の内径D3を
有する内筒嵌合部36が形成される。ホース嵌入部42
は、内周部に複数の環状の突条40が形成され、ホース
嵌入部42に嵌まり込む耐圧ホースが抜止めされる。内
筒31と外筒32との間に耐圧ホースを嵌め込むことに
よってホース接続部33とホース嵌入部42との間に耐
圧ホースが挟持され、この状態で耐圧ホースは各突条3
9,40によって抜止めされる。The outer cylinder 32 has an inner cylinder 3 at one axial end of a substantially cylindrical hose fitting portion into which the pressure-resistant hose is fitted.
An inner cylinder fitting portion 36 having an inner diameter D3 smaller than the outer diameter D2 of the large diameter portion 34 is formed. Hose fitting part 42
A plurality of annular ridges 40 are formed on the inner peripheral portion, and a pressure-resistant hose that fits into the hose fitting portion 42 is prevented from coming off. By inserting a pressure-resistant hose between the inner cylinder 31 and the outer cylinder 32, the pressure-resistant hose is sandwiched between the hose connection part 33 and the hose insertion part 42.
It is stopped by 9, 40.
【0018】内筒嵌合部36は、内筒31の大径部34
が嵌まり込んだとき、大径部34の外周面45に面接触
する内周面46を有し、内筒嵌合部36の内周面46と
ホース嵌入部42との間には段差面44が形成される。
内筒嵌合部36の軸線方向一端部(図1の下方)には内
筒嵌合部36よりも小径の略円筒状の螺合部37が形成
され、この螺合部37の外周面には外ねじ38が形成さ
れ、給油装置などの機器にこの螺合部37が螺合して固
定される。The inner cylinder fitting portion 36 is a large-diameter portion 34 of the inner cylinder 31.
Has an inner peripheral surface 46 that makes surface contact with the outer peripheral surface 45 of the large-diameter portion 34 when fitted. A step surface is formed between the inner peripheral surface 46 of the inner cylinder fitting portion 36 and the hose fitting portion 42. 44 are formed.
A substantially cylindrical screw portion 37 having a diameter smaller than that of the inner cylinder fitting portion 36 is formed at one end in the axial direction of the inner cylinder fitting portion 36 (below in FIG. 1). Is formed with an external screw 38, and the screw portion 37 is screwed and fixed to a device such as an oil supply device.
【0019】内筒嵌合部36の軸線方向一端部の内周面
48は、内周面46よりも小径に形成され、この内周面
48と内周面46とは段差面41を介して連なる。内筒
31の大径部34を外筒32の内筒嵌合部36の段差面
41まで嵌め込んだとき、大径部34の内周面49と内
筒嵌合部36の軸線方向一端部側の内周面48とは面一
に連なり、移送流体がスムーズに流れる。内筒31の大
径部34と連結部35とは段差面50を介して連なり、
大径部34を外筒32の段差面41に達するまで内筒嵌
合部36に嵌め込んだとき、前記内筒31の段差面50
と外筒32の段差面44とは面一に連なる。The inner peripheral surface 48 at one end in the axial direction of the inner cylinder fitting portion 36 is formed to have a smaller diameter than the inner peripheral surface 46, and the inner peripheral surface 48 and the inner peripheral surface 46 are interposed via the step surface 41. Be connected. When the large diameter portion 34 of the inner cylinder 31 is fitted to the step surface 41 of the inner cylinder fitting portion 36 of the outer cylinder 32, the inner peripheral surface 49 of the large diameter portion 34 and one end of the inner cylinder fitting portion 36 in the axial direction are fitted. The transfer fluid flows smoothly with the inner peripheral surface 48 on the side. The large diameter portion 34 and the connecting portion 35 of the inner cylinder 31 are connected via a step surface 50,
When the large diameter portion 34 is fitted into the inner cylinder fitting portion 36 until it reaches the step surface 41 of the outer cylinder 32, the step surface 50 of the inner cylinder 31
And the step surface 44 of the outer cylinder 32 are flush with each other.
【0020】外筒32の外周部には、軸直角断面の外形
が大略的に六角形である掛合部43が形成され、この掛
合部43にスパナなどの工具を掛合させることができ
る。At the outer peripheral portion of the outer cylinder 32, a hooking portion 43 having a substantially hexagonal outer shape in a section perpendicular to the axis is formed, and a tool such as a spanner can be hooked on the hooking portion 43.
【0021】外筒32の長さL1はたとえば57mm程
度に選ばれ、外径D1はたとえば35mm程度に選ばれ
る。The length L1 of the outer cylinder 32 is selected to be, for example, about 57 mm, and the outer diameter D1 is selected to be, for example, about 35 mm.
【0022】内筒31と外筒32を組付ける場合には、
内筒31を冷却して収縮させた状態で内筒31を外筒3
2に挿入し、内筒31の大径部34を外筒32の内筒嵌
合部36に嵌合させ、この状態で常温に戻すことによっ
て、内筒31は元の大きさに膨張し、内筒31の大径部
34と外筒32の内筒嵌合部36とが圧着され、確実に
内筒31と外筒32とが固定される。When assembling the inner cylinder 31 and the outer cylinder 32,
In a state where the inner cylinder 31 is cooled and contracted, the inner cylinder 31 is
2, the large-diameter portion 34 of the inner cylinder 31 is fitted into the inner cylinder fitting portion 36 of the outer cylinder 32, and the temperature is returned to room temperature in this state, whereby the inner cylinder 31 expands to its original size. The large diameter part 34 of the inner cylinder 31 and the inner cylinder fitting part 36 of the outer cylinder 32 are crimped, and the inner cylinder 31 and the outer cylinder 32 are securely fixed.
【0023】真鍮は線膨張係数α=1.84×10
-5(℃-1)であるので、大径部34の外径D2が24.
00mmの場合には、内筒31の大径部34をたとえば
液化窒素によって−200℃程度に冷却することによっ
て外径D2は0.05〜0.15mm程度収縮する。し
たがって、外筒32の内筒嵌合部36の外径D3は2
3.85〜23.95mm程度に選ばれ、好ましくは2
3.90mmに選ばれる。Brass has a linear expansion coefficient α = 1.84 × 10
−5 (° C. −1 ), so that the outer diameter D2 of the large diameter portion 34 is 24.
In the case of 00 mm, the outer diameter D2 shrinks by about 0.05 to 0.15 mm by cooling the large diameter portion 34 of the inner cylinder 31 to, for example, about -200 ° C. with liquefied nitrogen. Therefore, the outer diameter D3 of the inner cylinder fitting portion 36 of the outer cylinder 32 is 2
It is selected to be about 3.85 to 23.95 mm, preferably 2
3.90mm is selected.
【0024】内筒31を冷却して収縮させるのでなく、
外筒32を加熱して内筒嵌合部36を膨張させた後に内
筒31を嵌合させ、常温に戻して内筒31と外筒32を
固定させてもよいが、外筒32を加熱した場合には高温
によってスケールが生成し、美観が低下するおそれがあ
るので、内筒31を冷却して製造する方が望ましい。Instead of cooling and shrinking the inner cylinder 31,
After the outer cylinder 32 is heated to expand the inner cylinder fitting portion 36, the inner cylinder 31 may be fitted and returned to normal temperature to fix the inner cylinder 31 and the outer cylinder 32. In such a case, the scale may be generated by the high temperature and the aesthetic appearance may be deteriorated. Therefore, it is preferable that the inner cylinder 31 is manufactured by cooling.
【0025】また内筒31と外筒32とは圧着によって
固定されるので、内筒31と外筒32とが異種金属であ
っても確実に固定することができる。また、アルミニウ
ム合金など線膨張係数αの値が比較的大きい金属の場合
には、ドライアイスによって−80℃程度に冷却するこ
とによって十分収縮するので、ドライアイスを利用して
安価にかつ容易に製造することができる。Since the inner cylinder 31 and the outer cylinder 32 are fixed by crimping, even if the inner cylinder 31 and the outer cylinder 32 are made of dissimilar metals, they can be securely fixed. In the case of a metal having a relatively large coefficient of linear expansion α, such as an aluminum alloy, it is sufficiently contracted by being cooled to about −80 ° C. with dry ice, and thus is easily and inexpensively manufactured using dry ice. can do.
【0026】また内筒31と外筒32とが溶接による固
定が難しいステンレス鋼から形成されたとしても圧着に
よって固定されるので確実に固定することができる。ま
た内筒31の大径部34と外筒32の内筒嵌合部36と
の間に接着剤を介在させ、内筒31と外筒32とをさら
に確実にかつ液密に固定するようにしてもよい。また内
筒31および外筒32の材料として、銅、鋳鉄などであ
ってもよく、冷却手段としてエタノール、液化酸素など
であってもよい。Even if the inner cylinder 31 and the outer cylinder 32 are made of stainless steel, which is difficult to fix by welding, they are fixed by crimping, so that they can be securely fixed. An adhesive is interposed between the large-diameter portion 34 of the inner cylinder 31 and the inner cylinder fitting portion 36 of the outer cylinder 32 so that the inner cylinder 31 and the outer cylinder 32 can be more securely and liquid-tightly fixed. You may. The material of the inner cylinder 31 and the outer cylinder 32 may be copper, cast iron, or the like, and the cooling means may be ethanol, liquefied oxygen, or the like.
【0027】図4は、本発明の実施の第2形態である耐
圧ホース用接続金具55を示す断面図である。なお図1
〜図3に示される耐圧ホース用接続金具30と同様の構
成には同一の参照符号を付し、説明を省略する。この耐
圧ホース用接続金具55の内筒31の大径部34の開口
端には、外周面45から半径方向外方に突出する突条5
6が周方向全周にわたって形成され、外筒32の内筒嵌
合部35の内周面46の段差面41側の端部には前記突
条56が嵌まり込む嵌合溝57が周方向全周にわたって
形成される。突条56は、開口端に向かうにつれて半径
方向外方となるテーパ面を有する。FIG. 4 is a sectional view showing a connection fitting 55 for a pressure-resistant hose according to a second embodiment of the present invention. FIG. 1
3 are denoted by the same reference numerals, and description thereof is omitted. At the open end of the large-diameter portion 34 of the inner cylinder 31 of the pressure-resistant hose connection fitting 55, a ridge 5 projecting radially outward from the outer peripheral surface 45 is provided.
6 is formed over the entire circumference in the circumferential direction, and a fitting groove 57 into which the ridge 56 is fitted is formed at an end of the inner peripheral surface 46 of the inner cylinder fitting portion 35 of the outer cylinder 32 on the step surface 41 side. It is formed over the entire circumference. The ridge 56 has a tapered surface that becomes radially outward toward the opening end.
【0028】したがって内筒31を冷却して収縮させた
後、大径部34を内筒嵌合部36に嵌め込み、常温に戻
すことによって内筒31の突条56は内筒嵌合部36の
嵌合溝57に嵌まり込み、大径部34が内筒嵌合部36
に圧着されて固定される。このように内筒31の突条5
6が嵌合溝57に嵌まり込んだ状態で内筒31と外筒3
2とが固定されるので、内筒31に引張力が作用したと
しても突条56が嵌合溝57に係止されているので内筒
31が外筒32から容易に抜出すといったことが防がれ
る。Therefore, after the inner cylinder 31 is cooled and contracted, the large-diameter portion 34 is fitted into the inner cylinder fitting portion 36, and the temperature is returned to room temperature. The large-diameter portion 34 fits into the fitting groove 57 and the inner cylinder fitting portion 36
It is crimped and fixed. Thus, the ridge 5 of the inner cylinder 31
6 is fitted in the fitting groove 57 and the inner cylinder 31 and the outer cylinder 3
2 is fixed, so that even if a tensile force acts on the inner cylinder 31, the ridge 56 is locked in the fitting groove 57, so that the inner cylinder 31 is prevented from easily being pulled out of the outer cylinder 32. Can come off.
【0029】図5は、本発明の実施の第3形態である耐
圧ホース用接続金具60を示す断面図である。なお図1
〜図3に示される耐圧ホース用接続金具30と同様の構
成には同一の参照符号を付し説明を省略する。内筒31
の大径部34の開口端には、大径部34の厚み方向中間
部から軸線方向に突出する嵌合凸部61が周方向全周に
わたって形成され、外筒32の内筒嵌合部36の段差面
41を有する段差部には、前記嵌合凸部61が嵌合する
嵌合凹所62が段差面41から形成される。したがっ
て、内筒31を冷却して収縮させた後、嵌合凸部61を
嵌合凹所62に嵌合させて、大径部34を内筒嵌合部3
6に嵌合させ、常温に戻すことによって、内筒31と外
筒32とは大径部34の外周面45と内筒嵌合部36の
内周面46、および嵌合凸部61の外周面63と嵌合凹
所62が形成される内筒嵌合部36の内周面64とがそ
れぞれ圧着し、これによって液密にかつ確実に内筒31
と外筒32とが固定される。FIG. 5 is a sectional view showing a fitting 60 for a pressure-resistant hose according to a third embodiment of the present invention. FIG. 1
3 are denoted by the same reference numerals, and description thereof is omitted. Inner cylinder 31
At the open end of the large-diameter portion 34, a fitting projection 61 projecting in the axial direction from the middle portion in the thickness direction of the large-diameter portion 34 is formed over the entire circumference in the circumferential direction. In the step portion having the step surface 41, a fitting recess 62 in which the fitting protrusion 61 fits is formed from the step surface 41. Therefore, after the inner cylinder 31 is cooled and contracted, the fitting projection 61 is fitted into the fitting recess 62, and the large-diameter portion 34 is connected to the inner cylinder fitting portion 3.
6 and returned to normal temperature, the inner cylinder 31 and the outer cylinder 32 are separated from the outer peripheral surface 45 of the large-diameter portion 34, the inner peripheral surface 46 of the inner cylinder fitting portion 36, and the outer periphery of the fitting projection 61. The surface 63 and the inner peripheral surface 64 of the inner cylinder fitting portion 36 in which the fitting recess 62 is formed are pressed against each other, thereby ensuring the inner cylinder 31 in a liquid-tight manner.
And the outer cylinder 32 are fixed.
【0030】図6は、本発明の実施の第4形態である耐
圧ホース用接続金具67を示す断面図である。なお図1
〜図3に示される耐圧ホース用接続金具30に対応する
構成には同一の参照符号を付し説明を省略する。内筒3
1の大径部34の開口端には、大径部34の内周部から
軸線方向に突出する嵌合凸部68が周方向全周にわたっ
て形成され、外筒32の内筒嵌合部36の段差面41が
形成される段差部には、前記嵌合凸部68が嵌合する嵌
合凹所69が段差部の内周部に周方向全周にわたって形
成される。嵌合凸部68は、先端に向かうにつれて半径
方向内方に傾斜するテーパ面70を有し、嵌合凹所69
が形成される内筒嵌合部36には嵌合凸部68のテーパ
面70が当接するテーパ面71を有する。したがって、
内筒31を冷却し嵌合凸部68を嵌合凹所69に嵌合さ
せて大径部34を内筒嵌合部36に嵌め込んだ後、常温
に戻すことによって、大径部34の外周面45が内筒嵌
合部36の内周面46に圧着されるとともに、嵌合凸部
68のテーパ面70が内筒嵌合部36のテーパ面71に
圧着され、これによって内筒31と外筒32とが確実に
固定されるとともに液密性が向上する。FIG. 6 is a sectional view showing a connection fitting 67 for a pressure-resistant hose according to a fourth embodiment of the present invention. FIG. 1
The components corresponding to the pressure-resistant hose connection fitting 30 shown in FIG. Inner cylinder 3
At the open end of the large-diameter portion 34, a fitting projection 68 projecting from the inner periphery of the large-diameter portion 34 in the axial direction is formed over the entire circumference in the circumferential direction. In the step portion where the step surface 41 is formed, a fitting recess 69 into which the fitting convex portion 68 is fitted is formed in the inner peripheral portion of the step portion over the entire circumference in the circumferential direction. The fitting projection 68 has a tapered surface 70 that inclines radially inward toward the tip, and a fitting recess 69.
Is formed on the inner cylinder fitting portion 36, which has a tapered surface 71 with which the tapered surface 70 of the fitting projection 68 contacts. Therefore,
After cooling the inner cylinder 31 and fitting the fitting projection 68 into the fitting recess 69 and fitting the large-diameter portion 34 into the inner cylinder fitting portion 36, the temperature of the large-diameter portion 34 is reduced by returning to room temperature. The outer peripheral surface 45 is crimped to the inner peripheral surface 46 of the inner cylinder fitting portion 36, and the tapered surface 70 of the fitting convex portion 68 is crimped to the tapered surface 71 of the inner cylinder fitting portion 36. And the outer cylinder 32 are securely fixed, and the liquid tightness is improved.
【0031】図7は本発明の実施の第5形態である耐圧
ホース用接続金具75を示す断面図であり、図8は係止
部76付近を示す耐圧ホース用接続金具75の部分拡大
断面図である。なお図1〜図3示される耐圧ホース用接
続金具30に対応する部分には同一の参照符号を付し説
明を省略する。外筒32の内筒嵌合部36の段差面44
の内周部には、段差面44から軸線方向に突出する係止
部76が周方向に間隔をあけて複数、たとえば2〜8個
設けられる。内筒31の大径部34には、前記係止部7
6に臨んで凹んだ係止部用凹所77が形成される。FIG. 7 is a sectional view showing a connection member 75 for a pressure-resistant hose according to a fifth embodiment of the present invention, and FIG. 8 is a partially enlarged sectional view of the connection member 75 for a pressure-resistant hose showing the vicinity of a locking portion 76. It is. 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted. Step surface 44 of inner cylinder fitting portion 36 of outer cylinder 32
A plurality of, for example, 2 to 8 locking portions 76 projecting in the axial direction from the step surface 44 are provided at an inner peripheral portion of the inner peripheral portion at intervals in the circumferential direction. The large diameter portion 34 of the inner cylinder 31 has the locking portion 7
A recess 77 for the locking portion which is recessed toward 6 is formed.
【0032】このような内筒31を冷却して外筒32の
内筒嵌合部36に嵌め込み常温に戻して内筒31と外筒
32とを固定した後、図8に示されるように前記各係止
部76を内側へ変形させ、係止部76を係止部用凹所7
7に嵌め込むことによって内筒31に引張力が作用した
としても内筒31の大径部34は係止部76に係止さ
れ、抜止めされる。After cooling such an inner cylinder 31 and fitting it into the inner cylinder fitting portion 36 of the outer cylinder 32 to return to room temperature and fixing the inner cylinder 31 and the outer cylinder 32, as shown in FIG. Each locking portion 76 is deformed inward, and the locking portion 76 is
Even if the inner tube 31 is fitted with the pulley 7 and a tensile force acts on the inner tube 31, the large-diameter portion 34 of the inner tube 31 is locked by the locking portion 76 and is prevented from being pulled out.
【0033】係止部用凹所77は係止部76の基端部に
臨んで凹んで形成されるので、係止部76を内側へ折曲
げた後、打込むなどして係止部76を変形させた際、係
止部76の特に基端部が係止用嵌合凹所77に嵌まり込
むことによって、係止部76に無理な力が作用せず、係
止部76によって確実に内筒31の抜止めを行うことが
できる。Since the locking portion recess 77 is formed so as to be recessed facing the base end of the locking portion 76, the locking portion 76 is bent inward and then driven into the locking portion 76. Is deformed, the particularly proximal end of the locking portion 76 fits into the locking fitting recess 77, so that no excessive force acts on the locking portion 76 and the locking portion 76 ensures The inner cylinder 31 can be prevented from coming off.
【0034】このような係止部76および係止部用凹所
77を複数設けるのでなく、係止部76および係止部用
凹所77をそれぞれ外筒32の段差面44および内筒3
2の段差面50にそれぞれ周方向全周にわたって形成
し、このような係止部を内側に変形させて内筒31の大
径部34を係止するようにしてもよい。このように周方
向全周にわたる係止部によって内筒31が係止されるこ
とによって確実に内筒31の抜止めが行われる。Instead of providing a plurality of such locking portions 76 and the recesses 77 for the locking portion, the locking portions 76 and the recesses 77 for the locking portion are formed by the step surface 44 of the outer cylinder 32 and the inner cylinder 3, respectively.
The second step surface 50 may be formed over the entire circumference in the circumferential direction, and such a locking portion may be deformed inward to lock the large-diameter portion 34 of the inner cylinder 31. As described above, the locking of the inner cylinder 31 by the locking portion extending over the entire circumference in the circumferential direction ensures that the inner cylinder 31 is securely prevented from being removed.
【0035】[0035]
【発明の効果】以上のように本発明によれば、外筒の内
筒嵌合部に内筒が外筒に比べて低温の状態で内筒の大径
部を外筒の内筒嵌合部に嵌め込み、常温に戻することに
よって、内筒と外筒とは圧着されて確実に固定される。
したがって内筒と外筒とを容易にかつ確実に固定するこ
とができ、生産性が向上される。また内筒と外筒とは圧
着されて固定されるので、溶接による固定が困難な材質
であっても確実に固定することができる。As described above, according to the present invention, the large diameter portion of the inner cylinder is fitted to the inner cylinder fitting portion of the outer cylinder at a lower temperature than the outer cylinder at the inner cylinder fitting portion of the outer cylinder. The inner tube and the outer tube are crimped and securely fixed by fitting into the portion and returning to room temperature.
Therefore, the inner cylinder and the outer cylinder can be easily and reliably fixed, and the productivity is improved. Further, since the inner cylinder and the outer cylinder are press-bonded and fixed, even if the material is difficult to fix by welding, it can be surely fixed.
【0036】また内筒には突条が形成され、外筒には前
記突条が嵌まり込む嵌合溝が形成されるので、外筒の内
筒嵌合部に内筒の大径部が嵌まり込んだときに、内筒の
前記突条は外筒の前記嵌合溝に嵌まり込み、これによっ
て内筒に引張力が作用したとしても内筒が外筒から容易
に抜出すといったことが防がれる。Further, since the inner cylinder is formed with a ridge and the outer cylinder is formed with a fitting groove into which the ridge is fitted, the large-diameter portion of the inner cylinder is fitted in the inner cylinder fitting portion of the outer cylinder. When fitted, the protrusion of the inner cylinder fits into the fitting groove of the outer cylinder, whereby the inner cylinder can be easily pulled out of the outer cylinder even if a tensile force acts on the inner cylinder. Is prevented.
【0037】また本発明によれば、内筒の大径部には嵌
合凸部が形成され、外筒の段差部には嵌合凹所が形成さ
れるので、嵌合凹所に嵌合凸部を嵌合させて内筒と外筒
とを固定することによって、大径部の外周面および嵌合
凸部の外周面がそれぞれ外筒の内筒嵌合部に圧着され、
これによって確実にかつ液密に内筒と外筒とが固定され
る。According to the present invention, since the fitting projection is formed on the large diameter portion of the inner cylinder and the fitting recess is formed on the step of the outer cylinder, the fitting recess is formed. By fixing the inner cylinder and the outer cylinder by fitting the convex portions, the outer peripheral surface of the large-diameter portion and the outer peripheral surface of the fitting convex portion are respectively crimped to the inner cylinder fitting portion of the outer cylinder,
Thereby, the inner cylinder and the outer cylinder are securely and liquid-tightly fixed.
【0038】また本発明によれば、外筒には係止部が形
成され、この係止部によって内筒は係止されるので、内
筒に引張力が作用したとしても容易に内筒が外筒から抜
出すといったことが防がれる。Further, according to the present invention, a locking portion is formed on the outer cylinder, and the inner cylinder is locked by the locking portion. Therefore, even if a tensile force acts on the inner cylinder, the inner cylinder can be easily formed. Pulling out of the outer cylinder is prevented.
【0039】また本発明によれば、内筒には前記係止部
の基端部に臨んで係止部用凹所が形成されるので、係止
部を内側へ変形させた際、係止部に無理な力が作用せ
ず、内筒を確実に抜止めすることができる。According to the present invention, since the recess for the locking portion is formed in the inner cylinder facing the base end of the locking portion, the locking portion is deformed inward when the locking portion is deformed inward. An excessive force does not act on the portion, and the inner cylinder can be reliably prevented from coming off.
【図1】本発明の実施の第1形態である耐圧ホース用接
続金具30を示す断面図である。FIG. 1 is a sectional view showing a connection fitting for a pressure-resistant hose 30 according to a first embodiment of the present invention.
【図2】耐圧ホース用接続金具30を示す斜視図であ
る。FIG. 2 is a perspective view showing a connection fitting 30 for a pressure-resistant hose.
【図3】耐圧ホース用接続金具30の分解斜視図であ
る。FIG. 3 is an exploded perspective view of a pressure-resistant hose connection fitting 30.
【図4】本発明の実施の第2形態である耐圧ホース用接
続金具55を示す断面図である。FIG. 4 is a cross-sectional view showing a connection fitting 55 for a pressure-resistant hose according to a second embodiment of the present invention.
【図5】本発明の実施の第3形態である耐圧ホース用接
続金具60を示す断面図である。FIG. 5 is a cross-sectional view showing a connection fitting for a pressure-resistant hose 60 according to a third embodiment of the present invention.
【図6】本発明の実施の第4形態である耐圧ホース用接
続金具67を示す断面図である。FIG. 6 is a cross-sectional view showing a connection fitting 67 for a pressure-resistant hose according to a fourth embodiment of the present invention.
【図7】本発明の実施の第5形態である耐圧ホース用接
続金具75を示す断面図である。FIG. 7 is a sectional view showing a connection fitting 75 for a pressure-resistant hose according to a fifth embodiment of the present invention.
【図8】係止部76付近を示す耐圧ホース用接続金具7
5の部分拡大断面図である。FIG. 8 is a connection fitting 7 for a pressure-resistant hose showing the vicinity of a locking portion 76;
5 is a partially enlarged cross-sectional view of FIG.
【図9】従来の耐圧ホース用接続金具1を示す断面図で
ある。FIG. 9 is a sectional view showing a conventional fitting 1 for a pressure-resistant hose.
【図10】従来の耐圧ホース用接続金具25を示す断面
図である。FIG. 10 is a cross-sectional view showing a conventional connection fitting 25 for a pressure-resistant hose.
30,55,60,67,75 耐圧ホース用接続金具 31 内筒 32 外筒 33 ホース接続部 34 大径部 36 内筒嵌合部 37 螺合部 41,44,50 段差面 42 ホース嵌入部 45,63 外周面 46,48,49 内周面 56 突条 57 嵌合溝 68 嵌合凸部 69 嵌合凹所 76 係止部 77 係止部用凹所 30, 55, 60, 67, 75 Connection fitting for pressure-resistant hose 31 Inner cylinder 32 Outer cylinder 33 Hose connection part 34 Large diameter part 36 Inner cylinder fitting part 37 Screwing part 41, 44, 50 Step surface 42 Hose fitting part 45 , 63 Outer peripheral surface 46, 48, 49 Inner peripheral surface 56 Ridge 57 Fitting groove 68 Fitting projection 69 Fitting recess 76 Locking portion 77 Locking portion recess
Claims (5)
のホース接続部の軸線方向一端部に、ホース接続部より
も大径の大径部が同軸に形成される内筒と、耐圧ホース
が内側に嵌まり込む略円筒状のホース嵌入部の軸線方向
一端部に、内筒の前記大径部が嵌まり込む内筒嵌合部が
形成される外筒とを含む耐圧ホース用接続金具の製造方
法において、 前記内筒嵌合部の内径は内筒の大径部の外径よりも小径
に形成され、内筒が外筒に比べて低温の状態で内筒の大
径部を外筒の内筒嵌合部に嵌め込んだ後に常温に戻すこ
とを特徴とする耐圧ホース用接続金具の製造方法。An inner cylinder in which a large-diameter portion larger in diameter than the hose connection portion is formed coaxially at one axial end of a substantially cylindrical hose connection portion into which the pressure-resistant hose is fitted outside, and a pressure-resistant hose. A connection fitting for a pressure-resistant hose, comprising: an outer cylinder in which an inner cylinder fitting portion in which the large-diameter portion of the inner cylinder is fitted is formed at one end in the axial direction of a substantially cylindrical hose fitting portion into which is fitted inside. In the manufacturing method, the inner diameter of the inner cylinder fitting portion is formed to be smaller than the outer diameter of the large diameter portion of the inner cylinder, and the large diameter portion of the inner cylinder is removed at a lower temperature than the outer cylinder. A method for manufacturing a fitting for a pressure-resistant hose, wherein the fitting is returned to room temperature after being fitted into a fitting portion of the barrel.
方に突出する突条が周方向全周にわたって形成され、 外筒の内筒嵌合部には前記突条が嵌まり込む嵌合溝が形
成されることを特徴とする請求項1記載の耐圧ホース用
接続金具の製造方法。2. A radially outwardly projecting ridge is formed at the open end of the large diameter portion of the inner cylinder over the entire circumference in the circumferential direction, and the ridge is fitted to the inner cylinder fitting portion of the outer cylinder. The method for manufacturing a connection fitting for a pressure-resistant hose according to claim 1, wherein a fitting groove that fits in is formed.
突出する嵌合凸部が形成され、 外筒の内筒嵌合部には、前記嵌合凸部が嵌合する嵌合凹
所を有する段差部が形成されることを特徴とする請求項
1または2記載の耐圧ホース用接続金具の製造方法。3. A fitting projection protruding in the axial direction is formed at the opening end of the large diameter portion of the inner cylinder, and the fitting projection is fitted into the inner cylinder fitting portion of the outer cylinder. 3. The method according to claim 1, wherein a step having a fitting recess is formed.
た後に内側へ変形させて内筒の大径部を係止する係止部
が形成されることを特徴とする請求項1〜3のうちのい
ずれか1つに記載の耐圧ホース用接続金具の製造方法。4. The inner cylinder fitting portion is formed with a locking portion for locking the large diameter portion of the inner cylinder by deforming the inner cylinder inward after fitting the inner cylinder to the outer cylinder. The method for manufacturing a connection fitting for a pressure-resistant hose according to any one of claims 1 to 3.
臨んで凹んだ係止部用凹所が形成されることを特徴とす
る請求項4記載の耐圧ホース用接続金具の製造方法。5. The connection for a pressure-resistant hose according to claim 4, wherein a recess for a locking portion is formed in the large-diameter portion of the inner cylinder so as to face the base end of the locking portion. Metal fitting manufacturing method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8133915A JP2783784B2 (en) | 1996-05-28 | 1996-05-28 | Manufacturing method of connection fittings for pressure-resistant hoses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8133915A JP2783784B2 (en) | 1996-05-28 | 1996-05-28 | Manufacturing method of connection fittings for pressure-resistant hoses |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09317972A JPH09317972A (en) | 1997-12-12 |
JP2783784B2 true JP2783784B2 (en) | 1998-08-06 |
Family
ID=15116070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8133915A Expired - Fee Related JP2783784B2 (en) | 1996-05-28 | 1996-05-28 | Manufacturing method of connection fittings for pressure-resistant hoses |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2783784B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016002809A1 (en) * | 2014-06-30 | 2016-01-07 | 株式会社ブリヂストン | Hose with joint |
-
1996
- 1996-05-28 JP JP8133915A patent/JP2783784B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016002809A1 (en) * | 2014-06-30 | 2016-01-07 | 株式会社ブリヂストン | Hose with joint |
Also Published As
Publication number | Publication date |
---|---|
JPH09317972A (en) | 1997-12-12 |
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