JP2004162746A - Plug for vibration proofing pipe joint - Google Patents

Plug for vibration proofing pipe joint Download PDF

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Publication number
JP2004162746A
JP2004162746A JP2002326658A JP2002326658A JP2004162746A JP 2004162746 A JP2004162746 A JP 2004162746A JP 2002326658 A JP2002326658 A JP 2002326658A JP 2002326658 A JP2002326658 A JP 2002326658A JP 2004162746 A JP2004162746 A JP 2004162746A
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JP
Japan
Prior art keywords
plug
adapter
vibration
packing
main body
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.)
Pending
Application number
JP2002326658A
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Japanese (ja)
Inventor
Toshio Mikitani
俊雄 御器谷
Jin Yamashita
盡 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Kohki Co Ltd
Original Assignee
Nitto Kohki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Kohki Co Ltd filed Critical Nitto Kohki Co Ltd
Priority to JP2002326658A priority Critical patent/JP2004162746A/en
Publication of JP2004162746A publication Critical patent/JP2004162746A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact plug provided with sealing property and absorption property of vibration and having excellent durability to absorb vibration and shock transmitted from the plug in order to increase durability of a socket and prolong service life of use. <P>SOLUTION: A plug main body 11 of the vibration proofing pipe joint is used by connecting it with the socket of the pipe joint. When a rear end part 12 of the plug main body is inserted into a cylindrical adapter 14 having a connection part 13 at one end, a space 18 is formed in a step part 17 formed on an outer peripheral face 15 of the plug main body, an inner peripheral face 16 of the adapter, at a rear end 12 of the plug main body, and inside the adapter 14. Packing 20 is mounted in the space 18 on the outer peripheral face of the plug main body 11 and the inner peripheral face 16 of the adapter, and the plug main body 11 and the adapter 14 are integrally provided in a non-contact condition through the packing 20 to constitute the plug for vibration proofing pipe joint. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、インパクトレンチ等の振動・打撃工具に取り付けたプラグとこれと対をなすソケットとを接続してエア等の駆動流体を供給するための防振用管継手のプラグに関する。
【0002】
【従来の技術】
この種の振動・打撃工具は、例えば、自動車整備や板金業界やその他の業界に広く用いられており、インパクトレンチやネイラー・コンクリートブレーカ等が知られている。この振動・打撃工具にエア供給ホースを接続・離脱するためには、プラグとソケットとからなる管継手が用いられており、この管継手を工具に用いるには、工具自体にプラグを直付けして使用する場合と、この工具にニップルを介してホースを接続し、このホースに管継手を取り付けて使用する場合とがある。
【0003】
前者の場合は、インパクトレンチ等にプラグを直付けし、これにソケットを接続するものが知られている(例えば、特許文献1)。このように、工具に直付けする管継手の例を図7に示す。同図によると、インパクトレンチ等の振動・打撃工具1のエア供給口のめねじ部2にプラグ3の一端に設けたおねじ部4を螺着して直付けし、このプラグ3とこれと対をなすソケット6を嵌合してプラグ3の係止溝5にソケット6に設けた施錠ボール7を係止させ、かつソケット側に設けられ弾発されたスリーブ8で施錠ボール7を求心方向に押圧させてプラグ3とソケット6を接続し、更に、このソケット6の後端部にエア供給用ホース9を接続して用いられている。
【0004】
一方、振動・打撃工具のエア供給口にホースを接続する後者の場合は、先端にニップルを設け、かつ、後端にプラグを取付けたホースを用いる。このホースのニップルを振動・打撃工具のエア供給口に接続し、後端のプラグに、エア供給用ホースに取り付けたソケットを接続してエアを供給するようにしたものである。
【0005】
【特許文献1】
実開昭50−20234号公報
【0006】
【発明が解決しようとする課題】
しかしながら、振動・打撃工具1に図8に示すプラグ3を直付けして使用した図7に示す場合は、工具1から発生する振動・衝撃がプラグ3からソケット6にそのまま伝わるため、プラグ3が摩耗するばかりでなくプラグ3よりも複雑な構造であるソケット6側も摩耗して悪影響を与え、エアの流量不足等が発生する等、使用可能な寿命が短くなるなどの課題を有している。一方、振動・打撃工具のエア供給口にニップルを介してホースを接続して使用する場合は、全長が伸びてしまい、工具の取り回しが不便であった。
【0007】
本発明は、従来の課題点を解決するために開発に至ったものであり、その目的とするところは、コンパクトで、かつシール性と振動の吸収性を兼ね備えた耐久性に優れたプラグを提供することにあり、プラグから伝わる振動や衝撃を吸収してソケット側の耐久性を高め、使用可能な寿命を延ばすことにある。
【0008】
【課題を解決するための手段】
上記の目的を達成するため、請求項1に係る発明は、管継手のソケットに接続して用いられる防振用管継手のプラグであって、プラグ本体の後端部を、一端に接続部を有する筒状のアダプタに挿入したときに、プラグ本体の外周面とアダプタの内周面及びプラグ本体の後端とアダプタの内部に形成した段部とに空間を形成し、前記プラグ本体の外周面とアダプタの内周面との空間にパッキンを装着し、このパッキンを介して前記プラグ本体とアダプタを非接触状態で一体に設けた防振用管継手のプラグである。
【0009】
請求項2に係る発明は、前記パッキンには、プラグ本体の軸心方向への移動防止部と、自緊力でアダプタとプラグ本体の内外周面をシールするシール部と、振動を吸収する振動吸収部とを設けた防振用管継手のプラグである。
【0010】
請求項3に係る発明は、プラグ本体の外周に突出部を形成し、この突出部に前記パッキンの一端部を軸方向に一定の厚みをもって嵌合し、前記アダプタの先端部に前記パッキンの端部が位置決めされるようにリング部材を固定させて前記プラグ本体とアダプタとを一体に設けた防振用管継手のプラグである。
【0011】
請求項4に係る発明は、リング部材の内径は、前記プラグ本体の外周に形成された突出部の外径よりも小さく設けた防振用管継手のプラグである。
【0012】
【発明の実施の形態】
本発明における防振用管継手のプラグの実施形態を図面に基づいて説明する。図1は、管継手のソケットに接続して用いられる防振用管継手のプラグである。同図において、筒状の形態を呈するプラグ本体11の後端12を、一端におねじ等の接続部13を有する筒状のアダプタ14に挿入したときに、プラグ本体11の外周面15とアダプタ14の内周面16とに空間18を形成し、かつプラグ本体11の後端12とアダプタ14の内部略中間に形成した小径部14bの段部17とに空間19を形成する。更に、プラグ本体11の外周面15とアダプタ14の内周面16との空間18にゴムまたは樹脂等の弾性材で成形したパッキン(本例ではゴム製)20を装着し、このパッキン20を介してプラグ本体11とアダプタ14を非接触状態で一体に設けた防振用管継手のプラグである。
【0013】
前記プラグ本体11の外周には、図7に示されているソケット6側に装着した施錠ボール7を係止する係止溝21を形成し、更に、プラグ本体11の外周面15に突出部22を形成し、後端側に段差部23を形成している。前記突出部22は、環状に形成させてよいし、周上に複数個形成させてもよい。
また、アダプタ14の先端部には、パッキン20の端部が当接して位置決めされるようにリング部材24を固定させ、プラグ本体11とアダプタ14とが一体になるように構成している。リング部材24の内径は、プラグ本体11の外周に形成された突出部22の外径よりも小さく形成され、プラグ本体11とアダプタ14とが離脱する危険性を回避している。
【0014】
このリング部材24を固定するには、図1に示すように、アダプタ14の内周面に形成した段部14aに、リング部材24の一端を係止させ、他端をアダプタ14の先端部25をテーパ状にかしめて固定するようにしている。
前記プラグ本体とアダプタを非接触状態で一体に設けた他例を図3乃至図6に従って説明する。図3は、アダプタ14の先端部25内周に平板状のストップリング29を設けた例であり、図4は、アダプタ14の先端部25にキャップ(袋ナット)30を締付けた例であり、図5は、キャップ(袋ナット)30を締付けてカラー31を固定した例であり、図6は、ストップリング32でカラー33を固定した例である。
前記平板状のストップリング29と、キャップ30のフランジ部30aと、カラー31,33の内径は、突出部22の外径よりも小さく形成して、プラグ本体11とアダプタ14とが離脱する危険性をなくしている。上記他例に用いられるストップリング29、キャップ30及びカラー31,33はリング部材に含むものとする。
【0015】
図2に示すように空間18に設けられた環状形態のパッキン20は、プラグ本体11の突出部22にパッキン20の軸方向に一定の厚みをもって嵌合してプラグ本体11の軸心方向への移動を防止するための移動防止部26と、自緊力でアダプタ14とプラグ本体11の内外周面をシールするシール部27と、このシール部27よりも突出させて振動を吸収する振動吸収部28とを設けている。前記シール部27は、プラグ本体11の外周面15をシールするシール部27aとアダプタ14の内周面16をシールするシール部27bとからなり、このシール部27a,27bによりアダプタ14とプラグ本体11の内外周面を密封シールするようにしている。前記移動防止部26は、突出部22の形状に合わせて環状もしくは周上に複数個の凹部を形成してもよい。
【0016】
上記のシール部27aは、図2に示すように、パッキン20の略中央部内周面を環状に膨出形成して締め代を大きくしてシール性を高め、一方、シール部27bは、パッキン20の後端から軸心方向に凹部20aを設けて形成された外側の環状部であり、この環状部の外周面にテーパ面27cを形成し、凹部20aに内圧がかかった際にシール部27bが径方向へ拡がることでパッキン20のシール性を更に向上させている。
【0017】
前記の振動吸収部28は、前記凹部20aを設けて形成された内側の環状部でシール部27よりも軸の長手方向に突出して設けることによって、両者は、それぞれの機能を有効に発揮させている。
即ち、この振動吸収部28は、パッキン20の端部に振動を吸収させるために断面が円形状を呈し、この振動吸収部28をアダプタ14内周面の小径部14bとプラグ本体11後部の段差部23との空間18に、極力つぶし代を少なくした状態で装入されている。なお、パッキン20の移動防止部26とシール部27は振動吸収部28より吸収率が低いものの、シール性と共に振動も吸収する。
【0018】
次に上記実施形態の作用を説明する。
図1に示す防振用管継手のプラグを図7に示すインパクトレンチ等の振動工具1に取付ける場合、アダプタ14のおねじ等の接続部13を工具1のめねじ部2に螺着して取付ける。この取付けたプラグにエア供給ホースを接続したソケット6を接続して工具1を駆動すると、工具1から発生する振動はアダプタ14に伝達されるが、プラグ本体11とアダプタ14をパッキン20で介すことにより、振動をパッキン20で吸収して、非接触状態のプラグ本体11に伝わりにくくする。
従って、プラグと比較して構造が複雑なソケットに振動が伝わりにくくなり、ソケット側に対する摩耗等の悪影響を抑えることができる。
【0019】
また、アダプタ14とプラグ本体11は、直接触れていないため、アダプタ14を固定し、プラグ本体11に軸と直角の方向に応力が加わると、図8に示す一般のプラグと比較して大きな曲げ変位が発生する。これは曲げによって漏れが発生しないように、パッキン20のつぶし代を大きくする必要がある。しかし、振動を吸収しやすくするためには、極力つぶし代を減らした方が良い。そこで、パッキン20を漏れを防ぐシール部27と振動を吸収する振動吸収部28をパッキン20の別部位に設け、両部位が発揮する機能を有効に生じさせている。
【0020】
更に、アダプタ14の先端部に固定されたリング部材24の内径を、プラグ本体11の突出部22の外径よりも小さく形成することによって、仮にパッキン20が破損しても突出部22とリング部材24が係止するため、内圧がかかっている状態で、プラグ本体11とアダプタ14とが突然離脱する危険性を確実に回避することができる。
【0021】
【実施例】
本発明における防振用管継手のプラグと、図8に示す一般のプラグとを対比した振動試験による加速度測定結果について説明する。
試験方法は、加振機の振動方向に対してプラグを直角方向に取り付け、プラグにはこれと対をなすソケットを接続し、ソケットのねじ部にニップルを取り付け、このニップルに加速度センサを取り付けて測定した。この場合の振動条件は、加振機の振動方向に75Hz、17Gの加速度を加え、管継手の内部は0.6MPaに加圧した。この条件に基づいて測定した結果、本発明における加速度は5.5(G)、図8に示す一般のプラグの場合の加速度は36(G)であった。
従って、本発明におけるプラグは、アダプタから伝わる振動がパッキンによって緩和された上でプラグ本体に伝わるため、ソケットに伝わる振動は著しく減少されていることが実証された。
【0022】
【発明の効果】
以上のことから明らかなように、請求項1に係る発明によると、インパクトレンチ等の振動工具に取付けて使用した場合、プラグばかりでなく接続するソケットの耐久性を高め、使用可能な寿命を延ばすことができ、耐久性に優れたプラグを提供することができる。
【0023】
請求項2に係る発明によると、パッキンには移動防止部とシール部と振動吸収部とを別の部位に設け、それぞれの機能を有効に発揮するように構成しているので、シール性と振動の吸収性等を有効に向上させることができる。
【0024】
請求項3に係る発明によると、パッキンがプラグ本体に確実に位置決め固定されるため、シール性と振動の吸収性を確実に保持させることができ、長期間の使用に耐え得る。
【0025】
請求項4に係る発明によると、仮にパッキンが破損しても内圧がかかっている状態で、不用意にアダプタとプラグ本体が離脱するおそれを確実に回避することが可能となる。
【図面の簡単な説明】
【図1】本発明における防振用管継手のプラグの一実施例を示す半截断面図である。
【図2】図1におけるパッキンの装着前の状態を示す断面図である。
【図3】本発明におけるアダプタにパッキンを位置決めする他例を示した部分断面図である。
【図4】本発明におけるアダプタにパッキンを位置決めする更に他例を示した部分断面図である。
【図5】本発明におけるアダプタにパッキンを位置決めする更に他例を示した部分断面図である。
【図6】本発明におけるアダプタにパッキンを位置決めする更に他例を示した部分断面図である。
【図7】振動工具にプラグを取付けた従来例を示す一部切り欠き正面図である。
【図8】図7に示したプラグの半截拡大断面図である。
【符号の説明】
11 プラグ本体
12 後端部
13 接続部
14 アダプタ
15 外周面
16 内周面
17 段部
18 空間
19 空間
20 パッキン
22 突出部
24 リング部材
26 移動防止部
27 シール部
28 振動吸収部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plug of an anti-vibration pipe joint for connecting a plug attached to a vibration / hitting tool such as an impact wrench and a corresponding socket to supply a driving fluid such as air.
[0002]
[Prior art]
This type of vibration and impact tool is widely used in, for example, automobile maintenance, sheet metal industry and other industries, and impact wrench, nailer concrete breaker and the like are known. A pipe joint consisting of a plug and a socket is used to connect / disconnect the air supply hose to / from this vibration / hitting tool.To use this pipe joint for a tool, attach the plug directly to the tool itself. In some cases, a hose is connected to the tool via a nipple, and a pipe joint is attached to the hose.
[0003]
In the former case, a plug is directly attached to an impact wrench or the like, and a socket is connected to the plug (for example, Patent Document 1). FIG. 7 shows an example of the pipe joint directly attached to the tool. According to the figure, a male thread 4 provided at one end of a plug 3 is screwed and directly attached to a female thread 2 of an air supply port of a vibration and impact tool 1 such as an impact wrench. The paired sockets 6 are fitted to lock the locking balls 7 provided in the sockets 6 in the locking grooves 5 of the plug 3, and the locking balls 7 are elastically provided on the socket side to move the locking balls 7 in the centripetal direction. To connect the plug 3 to the socket 6, and further connect an air supply hose 9 to the rear end of the socket 6 for use.
[0004]
On the other hand, in the latter case in which a hose is connected to the air supply port of the vibration and impact tool, a hose having a nipple at the tip and a plug attached to the rear end is used. The nipple of this hose is connected to the air supply port of the vibration / hitting tool, and a socket attached to the air supply hose is connected to the plug at the rear end to supply air.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 50-20234
[Problems to be solved by the invention]
However, in the case shown in FIG. 7 in which the plug 3 shown in FIG. 8 is directly attached to the vibration / hitting tool 1, the vibration / impact generated from the tool 1 is directly transmitted from the plug 3 to the socket 6. In addition to the wear, the socket 6 side, which has a more complicated structure than the plug 3, also wears and exerts an adverse effect, causing problems such as a shortage of usable life, such as insufficient air flow. . On the other hand, when a hose is connected to the air supply port of the vibration and impact tool via a nipple and used, the overall length is increased, and the tool handling is inconvenient.
[0007]
The present invention has been developed to solve the conventional problems, and an object of the present invention is to provide a plug that is compact, has excellent sealing properties and vibration absorption, and has excellent durability. In other words, the vibration and shock transmitted from the plug are absorbed to enhance the durability of the socket side and extend the usable life.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a plug of a vibration isolating pipe joint used by being connected to a socket of the pipe joint, wherein a rear end portion of the plug main body has a connecting portion at one end. When inserted into the cylindrical adapter having a space, a space is formed between the outer peripheral surface of the plug main body, the inner peripheral surface of the adapter, the rear end of the plug main body, and the step formed inside the adapter, and the outer peripheral surface of the plug main body A plug for a vibration-proof fitting in which a packing is mounted in the space between the plug body and the inner peripheral surface of the adapter, and the plug body and the adapter are integrally provided in a non-contact state via the packing.
[0009]
The invention according to claim 2 is characterized in that the packing includes a portion for preventing movement of the plug body in the axial direction, a seal portion for sealing the adapter and the inner and outer peripheral surfaces of the adapter and the plug body by its own tension, and a vibration absorbing vibration. It is a plug of a pipe joint for vibration isolation provided with an absorption part.
[0010]
According to a third aspect of the present invention, a protrusion is formed on the outer periphery of the plug body, one end of the packing is fitted to the protrusion with a constant thickness in the axial direction, and the end of the packing is fitted to the tip of the adapter. A plug of a vibration-damping fitting in which a ring member is fixed so that a portion is positioned and the plug body and the adapter are integrally provided.
[0011]
The invention according to claim 4 is a plug of a pipe joint for vibration isolation provided in which an inner diameter of the ring member is smaller than an outer diameter of a protrusion formed on an outer periphery of the plug body.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a plug of a pipe joint for vibration isolation in the present invention will be described with reference to the drawings. FIG. 1 shows a plug of a vibration-damping pipe joint used to be connected to a socket of the pipe joint. In FIG. 1, when a rear end 12 of a plug body 11 having a tubular shape is inserted into a cylindrical adapter 14 having a connection portion 13 such as a screw at one end, an outer peripheral surface 15 of the plug body 11 A space 18 is formed with the inner peripheral surface 16 of the plug 14, and a space 19 is formed with the rear end 12 of the plug main body 11 and the step 17 of the small-diameter portion 14 b formed substantially in the middle of the adapter 14. Further, a packing (made of rubber in this example) 20 formed of an elastic material such as rubber or resin is attached to a space 18 between the outer peripheral surface 15 of the plug main body 11 and the inner peripheral surface 16 of the adapter 14, and this packing 20 is used. This is a plug of a vibration-proof fitting in which the plug body 11 and the adapter 14 are integrally provided in a non-contact state.
[0013]
A locking groove 21 for locking the locking ball 7 mounted on the socket 6 shown in FIG. 7 is formed on the outer periphery of the plug body 11. And a step 23 is formed on the rear end side. The protruding portion 22 may be formed in an annular shape, or may be formed in plural on the periphery.
Further, a ring member 24 is fixed to the end of the adapter 14 so that the end of the packing 20 abuts and is positioned, so that the plug body 11 and the adapter 14 are integrated. The inner diameter of the ring member 24 is formed smaller than the outer diameter of the protruding portion 22 formed on the outer periphery of the plug main body 11, thereby avoiding the risk that the plug main body 11 and the adapter 14 are separated.
[0014]
In order to fix the ring member 24, as shown in FIG. 1, one end of the ring member 24 is engaged with a step 14a formed on the inner peripheral surface of the adapter 14, and the other end is fixed to the distal end 25 of the adapter 14. Is fixed by caulking in a tapered shape.
Another example in which the plug body and the adapter are integrally provided in a non-contact state will be described with reference to FIGS. 3 shows an example in which a flat stop ring 29 is provided on the inner periphery of the distal end portion 25 of the adapter 14. FIG. 4 shows an example in which a cap (cap nut) 30 is fastened to the distal end portion 25 of the adapter 14. FIG. 5 shows an example in which the cap (cap nut) 30 is tightened to fix the collar 31, and FIG. 6 shows an example in which the collar 33 is fixed by the stop ring 32.
The flat stop ring 29, the flange 30a of the cap 30, and the inner diameters of the collars 31 and 33 are formed smaller than the outer diameter of the protruding part 22, and the plug body 11 and the adapter 14 may be separated from each other. Has been lost. The stop ring 29, the cap 30, and the collars 31, 33 used in the above other examples are included in the ring member.
[0015]
As shown in FIG. 2, the annular packing 20 provided in the space 18 is fitted to the projecting portion 22 of the plug main body 11 with a certain thickness in the axial direction of the packing 20, and is fitted in the axial direction of the plug main body 11. A movement preventing portion 26 for preventing movement, a sealing portion 27 for sealing the inner and outer peripheral surfaces of the adapter 14 and the plug body 11 by its own force, and a vibration absorbing portion for projecting from the sealing portion 27 to absorb vibration. 28 are provided. The seal portion 27 includes a seal portion 27a for sealing the outer peripheral surface 15 of the plug main body 11 and a seal portion 27b for sealing the inner peripheral surface 16 of the adapter 14, and the adapter 14 and the plug main body 11 are sealed by the seal portions 27a and 27b. Are hermetically sealed. The movement preventing portion 26 may have a plurality of recesses formed in an annular shape or on the circumference according to the shape of the protruding portion 22.
[0016]
As shown in FIG. 2, the seal portion 27a is formed by bulging the inner peripheral surface of the packing 20 at a substantially central portion in an annular shape to increase the interference and improve the sealing performance. The outer annular portion is formed by providing a concave portion 20a in the axial direction from the rear end, and a tapered surface 27c is formed on the outer peripheral surface of the annular portion. When an internal pressure is applied to the concave portion 20a, the seal portion 27b is formed. By expanding in the radial direction, the sealing performance of the packing 20 is further improved.
[0017]
The vibration absorbing portion 28 is an inner annular portion formed by providing the concave portion 20a and is provided so as to protrude in the longitudinal direction of the shaft from the seal portion 27, so that both can effectively exert their respective functions. I have.
That is, the vibration absorbing portion 28 has a circular cross section in order to absorb vibration at the end of the packing 20. The vibration absorbing portion 28 is formed by a step between the small diameter portion 14 b of the inner peripheral surface of the adapter 14 and the rear portion of the plug body 11. It is inserted into the space 18 with the part 23 with the crushing allowance reduced as much as possible. Although the movement preventing portion 26 and the seal portion 27 of the packing 20 have a lower absorptivity than the vibration absorbing portion 28, they also absorb the vibration together with the sealing performance.
[0018]
Next, the operation of the above embodiment will be described.
When attaching the plug of the vibration-proof fitting shown in FIG. 1 to the vibration tool 1 such as an impact wrench shown in FIG. 7, the connection part 13 such as the external thread of the adapter 14 is screwed to the female thread part 2 of the tool 1. Attach. When the tool 1 is driven by connecting the socket 6 to which the air supply hose is connected to the attached plug, vibration generated from the tool 1 is transmitted to the adapter 14, but the plug body 11 and the adapter 14 are passed through the packing 20. As a result, the vibration is absorbed by the packing 20 and is not easily transmitted to the plug body 11 in a non-contact state.
Therefore, vibration is less likely to be transmitted to a socket having a complicated structure than a plug, and adverse effects such as wear on the socket can be suppressed.
[0019]
Further, since the adapter 14 and the plug main body 11 do not directly touch each other, the adapter 14 is fixed, and when a stress is applied to the plug main body 11 in a direction perpendicular to the axis, a large bending as compared with the general plug shown in FIG. Displacement occurs. In this case, it is necessary to increase the allowance of the packing 20 so that leakage does not occur due to bending. However, in order to easily absorb vibration, it is better to reduce the crushing allowance as much as possible. In view of this, a seal portion 27 for preventing leakage of the packing 20 and a vibration absorbing portion 28 for absorbing vibration are provided at separate portions of the packing 20 to effectively produce the functions exhibited by both portions.
[0020]
Furthermore, by forming the inner diameter of the ring member 24 fixed to the distal end of the adapter 14 smaller than the outer diameter of the protrusion 22 of the plug body 11, even if the packing 20 is damaged, the protrusion 22 and the ring member Since the lock 24 is locked, the risk that the plug body 11 and the adapter 14 are suddenly separated from each other when the internal pressure is applied can be reliably avoided.
[0021]
【Example】
A description will be given of the result of acceleration measurement by a vibration test in which the plug of the pipe joint for vibration isolation according to the present invention is compared with the general plug shown in FIG.
The test method is to attach a plug at right angles to the vibration direction of the shaker, connect a plug to the plug, attach a nipple to the thread of the socket, and attach an acceleration sensor to this nipple. It was measured. The vibration conditions in this case were such that an acceleration of 75 Hz and 17 G was applied in the vibration direction of the shaker, and the inside of the pipe joint was pressurized to 0.6 MPa. As a result of measurement based on these conditions, the acceleration in the present invention was 5.5 (G), and the acceleration in the case of the general plug shown in FIG. 8 was 36 (G).
Therefore, it was proved that the vibration transmitted to the socket of the plug according to the present invention was significantly reduced because the vibration transmitted from the adapter was transmitted to the plug body after being reduced by the packing.
[0022]
【The invention's effect】
As is apparent from the above, according to the first aspect of the present invention, when used by attaching to a vibration tool such as an impact wrench, the durability of not only the plug but also the socket to be connected is increased, and the usable life is extended. Thus, a plug having excellent durability can be provided.
[0023]
According to the second aspect of the present invention, the packing is provided with the movement preventing portion, the sealing portion, and the vibration absorbing portion at different portions so that the respective functions can be effectively exerted. Can be effectively improved.
[0024]
According to the third aspect of the present invention, since the packing is securely positioned and fixed to the plug main body, it is possible to reliably maintain the sealing property and the vibration absorbing property, and to withstand long-term use.
[0025]
According to the invention according to claim 4, even if the packing is broken, it is possible to reliably avoid the possibility that the adapter and the plug main body are inadvertently detached in a state where the internal pressure is applied.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing an embodiment of a plug of a pipe joint for vibration isolation according to the present invention.
FIG. 2 is a sectional view showing a state before the packing in FIG. 1 is attached.
FIG. 3 is a partial sectional view showing another example of positioning a packing on an adapter according to the present invention.
FIG. 4 is a partial sectional view showing still another example of positioning a packing on an adapter according to the present invention.
FIG. 5 is a partial sectional view showing still another example of positioning a packing on an adapter according to the present invention.
FIG. 6 is a partial sectional view showing still another example of positioning a packing on an adapter according to the present invention.
FIG. 7 is a partially cutaway front view showing a conventional example in which a plug is attached to a vibration tool.
FIG. 8 is a partially enlarged sectional view of the plug shown in FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Plug main body 12 Rear end part 13 Connection part 14 Adapter 15 Outer peripheral surface 16 Inner peripheral surface 17 Step part 18 Space 19 Space 20 Packing 22 Projection part 24 Ring member 26 Move prevention part 27 Seal part 28 Vibration absorption part

Claims (4)

管継手のソケットに接続して用いられる防振用管継手のプラグであって、プラグ本体の後端部を、一端に接続部を有する筒状のアダプタに挿入したときに、プラグ本体の外周面とアダプタの内周面及びプラグ本体の後端とアダプタの内部に形成した段部とに空間を形成し、前記プラグ本体の外周面とアダプタの内周面との空間にパッキンを装着し、このパッキンを介して前記プラグ本体とアダプタを非接触状態で一体に設けたことを特徴とする防振用管継手のプラグ。An anti-vibration pipe joint plug used by being connected to a socket of a pipe joint, the outer peripheral surface of the plug main body being inserted when a rear end of the plug main body is inserted into a cylindrical adapter having a connection portion at one end. A space is formed between the inner peripheral surface of the adapter and the rear end of the plug main body and the step formed inside the adapter, and packing is mounted in a space between the outer peripheral surface of the plug main body and the inner peripheral surface of the adapter. A plug for a vibration-damping fitting, wherein the plug body and the adapter are integrally provided in a non-contact state via a packing. 前記パッキンには、プラグ本体の軸心方向への移動防止部と、自緊力でアダプタとプラグ本体の内外周面をシールするシール部と、振動を吸収する振動吸収部とを設けた請求項1に記載の防振用管継手のプラグ。The packing is provided with a part for preventing movement of the plug body in the axial direction, a seal part for sealing the adapter and the inner and outer peripheral surfaces of the adapter and the plug body by its own tension, and a vibration absorbing part for absorbing vibration. 2. The plug of the pipe joint for vibration isolation according to 1. 前記プラグ本体の外周に突出部を形成し、この突出部に前記パッキンの一端部を軸方向に一定の厚みをもって嵌合し、前記アダプタの先端部に前記パッキンの端部が位置決めされるようにリング部材を固定させて前記プラグ本体とアダプタとを一体に設けたことを特徴とする請求項1又は2に記載の防振用管継手のプラグ。A protrusion is formed on the outer periphery of the plug body, and one end of the packing is fitted to the protrusion with a constant thickness in the axial direction so that the end of the packing is positioned at the tip of the adapter. The plug for a vibration-damping pipe joint according to claim 1, wherein the plug body and the adapter are integrally provided by fixing a ring member. 前記リング部材の内径は、前記プラグ本体の外周に形成された突出部の外径よりも小さく設けたことを特徴とする請求項3記載の防振用管継手のプラグ。The plug according to claim 3, wherein an inner diameter of the ring member is smaller than an outer diameter of a protrusion formed on an outer periphery of the plug body.
JP2002326658A 2002-11-11 2002-11-11 Plug for vibration proofing pipe joint Pending JP2004162746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002326658A JP2004162746A (en) 2002-11-11 2002-11-11 Plug for vibration proofing pipe joint

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Application Number Priority Date Filing Date Title
JP2002326658A JP2004162746A (en) 2002-11-11 2002-11-11 Plug for vibration proofing pipe joint

Publications (1)

Publication Number Publication Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112177968A (en) * 2019-07-05 2021-01-05 芜湖美的厨卫电器制造有限公司 Pipeline connecting assembly for water pump, water pump assembly with pipeline connecting assembly and water heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112177968A (en) * 2019-07-05 2021-01-05 芜湖美的厨卫电器制造有限公司 Pipeline connecting assembly for water pump, water pump assembly with pipeline connecting assembly and water heater

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