JP4517977B2 - Safety mechanism for compressed air supply equipment - Google Patents

Safety mechanism for compressed air supply equipment Download PDF

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JP4517977B2
JP4517977B2 JP2005231117A JP2005231117A JP4517977B2 JP 4517977 B2 JP4517977 B2 JP 4517977B2 JP 2005231117 A JP2005231117 A JP 2005231117A JP 2005231117 A JP2005231117 A JP 2005231117A JP 4517977 B2 JP4517977 B2 JP 4517977B2
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pressure
compressed air
plug
valve body
air supply
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JP2007047997A (en
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政敏 浅井
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Max Co Ltd
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Description

本発明は、低圧用プラグと第二の高圧用プラグの両方又は低圧用プラグと第一の高圧用プラグと第二の高圧用プラグが接続されたときに、各プラグに応じた圧力の圧縮空気を供給することができる圧縮空気供給装置において、低圧用プラグを接続したときに一次圧側から高圧の圧縮空気が二次圧側の低圧用プラグに供給されるのを阻止する安全機構に関する。   The present invention provides a compressed air having a pressure corresponding to each plug when both the low-pressure plug and the second high-pressure plug or the low-pressure plug, the first high-pressure plug, and the second high-pressure plug are connected. In the compressed air supply apparatus that can supply the low pressure plug, the high pressure compressed air is prevented from being supplied from the primary pressure side to the low pressure plug on the secondary pressure side when the low pressure plug is connected.

高圧ガス取締り法の改正により、高圧のガスの使用が認められるようになるにしたがって、使用機器も高圧側に徐々にシフトしてきた。その理由は、高圧の圧縮空気を利用することができれば、工具自体をコンパクトにしても高いエネルギーが得られるので、軽くて取り扱いやすくなり、また集成材SVL、LVL等の硬い材料を締結する必要性が増加し、高エネルギーが必要とされているからである。このため、最大使用圧力も、従来の0.98MPa未満の低圧、2.94MPa以下の第一の高圧のほかに、4〜4.2MPa以下の第二の高圧の最高使用圧力を仕様としているホースやその先端に装着されている接続機器が存在する。そして、上述の高圧の利便性から、今後このような傾向は、さらに5MPa未満にまでシフトすると予測される。   As the use of high-pressure gas has been approved due to the revision of the High-Pressure Gas Control Law, the equipment used has gradually shifted to the high-pressure side. The reason is that if high-pressure compressed air can be used, high energy can be obtained even if the tool itself is compact, so that it is light and easy to handle, and it is necessary to fasten hard materials such as laminated SVL and LVL. This is because high energy is required. Therefore, in addition to the conventional low pressure of less than 0.98 MPa and the first high pressure of 2.94 MPa or less, the maximum operating pressure is a hose that has a second working pressure of 4 to 4.2 MPa or less. There is also a connected device attached to the tip of the device. And from the convenience of the above-mentioned high pressure, it is predicted that such a tendency will further shift to less than 5 MPa in the future.

これに対し、従来は各圧力帯に専用の接続機器が使用されているのが現状である。たとえば、減圧弁を設けて常圧(低圧)、高圧両方の圧縮空気を供給できる共通の空気圧縮機に低圧用と高圧用のカプラを取り付けておき、低圧用カプラには低圧用のプラグを有する釘打機を、高圧用カプラには高圧用のプラグを有する釘打機を接続するように構成されている。これに対し、同じカプラに常圧用(低圧用)と高圧用のプラグが接続可能としたものも知られている。
特開2003−90480公報
On the other hand, in the past, dedicated connection devices have been used for each pressure zone. For example, a low pressure coupler and a high pressure coupler are attached to a common air compressor which is provided with a pressure reducing valve and can supply both normal pressure (low pressure) and high pressure compressed air, and the low pressure coupler has a low pressure plug. The nailer is configured to connect a nailing machine having a high-pressure plug to the high-pressure coupler. On the other hand, it is also known that a normal pressure (low pressure) and high pressure plug can be connected to the same coupler.
JP 2003-90480 A

しかしながら、圧縮空気供給装置に1つのカプラを備え、そこに複数の圧力帯域のプラグが接続できるようになると、なんらかの原因により、装置内の圧力調整機構(減圧機構)を構成しているコイルバネが折れたり、シールリングが破損したりした場合、これに気がつかずに低圧用プラグを接続したとき、高圧の一次圧がそのまま上記低圧用プラグに供給され、釘打機等の接続機器が破損したり、思いがけない高出力のために手元が狂ったりする可能性がある。   However, if a compressed air supply device is equipped with a single coupler and plugs with multiple pressure bands can be connected to it, the coil spring constituting the pressure adjustment mechanism (pressure reduction mechanism) in the device will break due to some cause. Or when the seal ring is damaged, when the low pressure plug is connected without noticing this, the high pressure primary pressure is supplied to the low pressure plug as it is, and the connecting equipment such as the nailing machine is damaged, There is a possibility of being out of hand because of unexpected high output.

本発明は上記問題点を解消し、内部の部品に破損等があって低圧用プラグに所定圧を越える規格外の高圧が供給されたときは、速やかに大気に放出して危険を回避して安全を確保することができる圧縮空気供給装置の安全機構を提供することをその課題とする。   The present invention solves the above problems, and when a high pressure outside the standard exceeding the specified pressure is supplied to the low pressure plug due to damage to the internal parts, it is promptly released to the atmosphere to avoid danger. It is an object of the present invention to provide a safety mechanism for a compressed air supply device that can ensure safety.

上記課題を解決するため、請求項1に係る発明は、圧縮空気供給装置本体の一側に圧縮空気供給源に通じる一次圧側開口部を、他側に接続機器用カプラに通じる二次圧側開口部を形成し、両開口部間に圧縮空気の導通空間を形成するとともに、圧縮空気供給装置本体の一次圧側には圧力調整機構を設け、二次圧側開口部には低圧用プラグと第一の高圧用プラグと第二の高圧用プラグとを接続させるカプラを設け、中間には上記圧力調整機構によって調圧された圧縮空気を二次圧側に開放遮断する弁体を設け、上記圧力調整機構を作動させて上記各プラグに応じた空気圧の圧縮空気を供給するようにした圧縮空気供給装置において、所定圧を超える圧縮空気を大気に開放する安全弁を上記導通空間に対して開閉自在に配置し、上記安全弁を備えたハウジングには上記導通空間に通じる小孔を形成し、この小孔を上記導通空間側に設けた可動スリーブで塞ぐとともに、該可動スリーブには上記小孔と連通可能な横穴を形成し、上記低圧用プラグを接続したときにのみ上記横穴と小孔とが連通し、上記導通空間内の圧縮空気の空気圧が上記所定圧を超えたときに、上記空気圧が上記安全弁を開いて大気に放出されるようにしたことを特徴とする。 In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a compressed air supply device main body having a primary pressure side opening that leads to a compressed air supply source on the other side and a secondary pressure side opening that leads to a coupler for a connected device on the other side. A compressed air conduction space is formed between the openings, a pressure adjusting mechanism is provided on the primary pressure side of the compressed air supply device body, and a low pressure plug and a first high pressure are provided on the secondary pressure side opening. A coupler that connects the plug for use with the second high-pressure plug is provided, and a valve body that opens and shuts off the compressed air that has been regulated by the pressure regulating mechanism to the secondary pressure side is provided in the middle to operate the pressure regulating mechanism in the compressed air supply apparatus that supplies the compressed air is allowed to air pressure corresponding to the respective plug, the compressed air in excess of a predetermined pressure is arranged a safety valve that opens to the atmosphere freely opened and closed with respect to said flow space, said Equipped with safety valve The housing forms a small hole communicating with the flow space, the small holes with closed by a movable sleeve provided on the introducing space side, the movable sleeve forming the small hole communicating with possible side holes, the low-pressure The side hole and the small hole communicate with each other only when the plug is connected . When the air pressure of the compressed air in the conduction space exceeds the predetermined pressure, the air pressure is released to the atmosphere by opening the safety valve. characterized in that way the.

請求項2に係る発明は、請求項1において、上記各プラグの接続時に上記弁体を異なる移動量だけ移動させて一次圧側と二次圧側とを開放し、上記弁体の移動量に応じて上記圧力調整機構を作動させて上記各プラグに応じた空気圧の圧縮空気を供給するようにした圧縮空気供給装置において、上記低圧用プラグの接続に伴い上記弁体を押し出し移動させたときにのみ上記横穴と小孔とが連通するようにしたことを特徴とする。 According to a second aspect of the present invention, in the first aspect, when the plugs are connected, the valve body is moved by a different amount of movement to open the primary pressure side and the secondary pressure side, and according to the amount of movement of the valve body. in the compressed air supply apparatus that by operating the pressure adjustment mechanism supplying compressed air pressure corresponding to the respective plug, said only when moving extruding the valve body with the connection of the low-pressure plug The lateral hole and the small hole communicate with each other.

請求項3に係る発明請求項1において、上記カプラの上記導通空間側には、上記可動スリーブに代えて、上記低圧用プラグを接続したときにのみ作動する筒状の作動部材を設け、上記安全弁を、上記弁体の二次圧側に配置するとともに、上記小孔を上記作動部材で塞ぐとともに、該作動部材には上記小孔と連通可能な横穴を形成し、上記作動部材が上記低圧用プラグの接続に伴い押し込まれるように作動したときにのみ、上記横穴と小孔とが連通し、上記導通空間内の圧縮空気の空気圧が上記所定圧を超えたときに、上記空気圧が上記安全弁を開いて大気に放出されるようにしたことを特徴とする。 The invention according to claim 3, in claim 1, in the flow space side of the coupler, instead of the movable sleeve is provided with a tubular actuating member which operates only when connected to the low-pressure plug, the safety valve, while disposed in the secondary pressure side of the valve body, the small holes with closed by the actuating member, the said actuating member to form the small hole communicating with possible side holes, said actuating member is the low-pressure The side hole communicates with the small hole only when operated so as to be pushed in with the connection of the plug, and when the air pressure of the compressed air in the conduction space exceeds the predetermined pressure, the air pressure is reduced to the safety valve. It is characterized in that it is opened to the atmosphere .

請求項1に係る発明によれば、低圧用プラグを二次圧側開口部に接続したとき、一次圧側と二次圧側の両開口部間に形成された導通空間内の圧縮空気が安全弁に供給される。したがって、何らかの原因によって圧力調整機構を構成する部品が破損したり摩耗したりすることにより、上記導通空間に所定圧を越える圧縮空気が供給されたときは、安全弁が開いて上記圧縮空気は速やかに大気に放出される。したがって、危険を回避して安全を確保することができる。   According to the first aspect of the present invention, when the low pressure plug is connected to the secondary pressure side opening, the compressed air in the conduction space formed between both the primary pressure side and secondary pressure side openings is supplied to the safety valve. The Therefore, when the compressed air exceeding a predetermined pressure is supplied to the conduction space due to damage or wear of the parts constituting the pressure adjusting mechanism for some reason, the safety valve opens and the compressed air is quickly Released into the atmosphere. Therefore, it is possible to avoid danger and ensure safety.

請求項2に係る発明によれば、低圧用プラグを二次圧側開口部に接続したとき、弁体が移動すると同時に上記導通空間内の圧縮空気が安全弁に供給されるから、請求項1に係る発明の場合と同様に、何らかの原因によって圧力調整機構を構成する部品が破損したり摩耗したりすることにより、上記導通空間に所定圧を越える圧縮空気が供給されたときは、安全弁が開いて上記圧縮空気は速やかに大気に放出される。したがって、危険を回避して安全を確保することができる。   According to the second aspect of the present invention, when the low pressure plug is connected to the secondary pressure side opening, the compressed air in the conduction space is supplied to the safety valve simultaneously with the movement of the valve body. As in the case of the invention, when compressed air exceeding a predetermined pressure is supplied to the conduction space due to damage or wear of parts constituting the pressure adjustment mechanism for some reason, the safety valve opens and the above-mentioned The compressed air is quickly released into the atmosphere. Therefore, it is possible to avoid danger and ensure safety.

請求項3に係る発明によれば、低圧用プラグを差し込んだときにのみ作動する作動部材が作動したときにのみ導通空間内の圧縮空気が安全弁に供給されるから、請求項1に係る発明の場合と同様に、何らかの原因によって圧力調整機構を構成する部品が破損したり摩耗したりすることにより、上記導通空間に所定圧を越える圧縮空気が供給されたときは、安全弁が開いて上記圧縮空気は速やかに大気に放出される。したがって、危険を回避して安全を確保することができる。   According to the third aspect of the invention, the compressed air in the conduction space is supplied to the safety valve only when the operating member that operates only when the low-pressure plug is inserted is operated. As in the case, when the compressed air exceeding a predetermined pressure is supplied to the conduction space due to damage or wear of the components constituting the pressure adjusting mechanism for some reason, the safety valve opens and the compressed air is opened. Is promptly released to the atmosphere. Therefore, it is possible to avoid danger and ensure safety.

以下本発明の実施形態について説明をするが、ここでは便宜上、高圧帯域の「第一の高圧」を「中間圧」、これよりも高い高圧帯域〈超高圧帯域〉の「第二の高圧」を「高圧」として説明していく。   Hereinafter, embodiments of the present invention will be described. For convenience, the “first high pressure” in the high pressure zone is set to “intermediate pressure”, and the “second high pressure” in the higher pressure zone <ultra-high pressure zone> is set higher. It will be described as “high pressure”.

図1は低圧用プラグと中間圧用プラグと高圧用プラグとが接続可能で、それぞれに所定の圧縮空気を供給することができるようにした実施形態の一例を示すもので、同図において符号1は圧縮空気供給装置本体に設けられたハウジングを示す。このハウジング1は装置本体に直接に設けられたハウジング1aとハウジング1aに結合されたカプラ用ハウジング1bを含む。上記ハウジング1の一側には一次圧側開口部2が形成され、他側には接続機器に接続するためのカプラに通じる二次圧側開口部3が形成されている。   FIG. 1 shows an example of an embodiment in which a low-pressure plug, an intermediate-pressure plug, and a high-pressure plug can be connected to each other, and predetermined compressed air can be supplied to each of them. The housing provided in the compressed air supply device main body is shown. The housing 1 includes a housing 1a provided directly on the apparatus main body and a coupler housing 1b coupled to the housing 1a. A primary pressure side opening 2 is formed on one side of the housing 1, and a secondary pressure side opening 3 leading to a coupler for connecting to a connection device is formed on the other side.

上記両開口部2、3間には調整シリンダ4が配置され、その周囲には圧縮空気の導通空間Sが形成されている。調整シリンダ4は有底筒状で、一端は一次圧側開口部2に開口し、その反対側は底部5によって閉じられている。   An adjustment cylinder 4 is disposed between the openings 2 and 3, and a compressed air conduction space S is formed around the adjustment cylinder 4. The adjusting cylinder 4 has a bottomed cylindrical shape, and one end opens to the primary pressure side opening 2, and the opposite side is closed by the bottom 5.

次に、上記ハウジング1の一次圧側開口部2には第1弁体6が配置され、二次圧側開口部3には第2弁体7が配置されている。第1弁体6は一次圧側開口部2を閉じるようにバネ8で付勢されている。また、二次圧側開口部3には筒状ステム10が摺動自在に配置され、第2弁体7と係合している。   Next, a first valve body 6 is disposed in the primary pressure side opening 2 of the housing 1, and a second valve body 7 is disposed in the secondary pressure side opening 3. The first valve body 6 is biased by a spring 8 so as to close the primary pressure side opening 2. A cylindrical stem 10 is slidably disposed in the secondary pressure side opening 3 and is engaged with the second valve body 7.

第1弁体6と第2弁体7との間には圧力調整機構が設けられている。すなわち、調整シリンダ4内には調整ピストン11が摺動自在に配置されている。この調整ピストン11の一側は円錐状に形成され、その先端には上記一次圧側開口部2に設けられた第1弁体6を押し込み可能な押圧部12が設けられている。また、上記一側の面13は上記導通空間S内の圧縮空気を受圧する受圧面となっている。調整ピストン11の中心には貫通孔14が形成されている。   A pressure adjustment mechanism is provided between the first valve body 6 and the second valve body 7. That is, the adjustment piston 11 is slidably disposed in the adjustment cylinder 4. One side of the adjustment piston 11 is formed in a conical shape, and a pressing portion 12 capable of pressing the first valve body 6 provided in the primary pressure side opening 2 is provided at the tip thereof. The one side surface 13 is a pressure receiving surface that receives the compressed air in the conduction space S. A through hole 14 is formed in the center of the adjustment piston 11.

調整ピストン11の他側と調整シリンダ4の底部5との間には調圧バネ15が配置され、調整ピストン11はこの調圧バネ15により常時上記押圧部12が上記第1弁体6を押し込む押圧方向に付勢されている。   A pressure adjustment spring 15 is disposed between the other side of the adjustment piston 11 and the bottom 5 of the adjustment cylinder 4, and the adjustment piston 11 is always pressed by the pressure portion 12 by the pressure adjustment spring 15. It is biased in the pressing direction.

さらに、上記調整シリンダ4の第2弁体7側に第2調整シリンダ21が設けられている。この第2調整シリンダ21には第2調整ピストン22が摺動自在に収容されている。また、第2調整ピストン22と上記調整ピストン11とは連結杆23を介して連結されている。   Furthermore, a second adjustment cylinder 21 is provided on the second cylinder 7 side of the adjustment cylinder 4. A second adjustment piston 22 is slidably accommodated in the second adjustment cylinder 21. Further, the second adjustment piston 22 and the adjustment piston 11 are connected via a connecting rod 23.

次に、第1弁体6と第2弁体7との間には作動杆16が設けられている。作動杆16は上記調整ピストン11の中心貫通孔14と第2調整シリンダ21とを貫通し、その中間には鍔部18が形成され、鍔部18と調整ピストン11との間には押えバネ20が設けられている。また、作動杆16と調整シリンダ4の底部の貫通孔とはシールリングによってシールされている。また、上記作動杆16には上記第2調整シリンダ21の底部24に形成された貫通孔25と第2調整ピストン22の中心の貫通孔26とシールするシールリング27、28が取り付けられている。なお、第2調整ピストン22のシールリング28は初期状態では第2調整ピストン22の貫通孔26とシールしていない。そして、上記第2弁体7が上記作動杆16を上記シールリング27が外れる程度移動させたとき、シールが外れて上記導通空間S内の圧縮空気が上記貫通孔25から第2調整シリンダ21の底部24と第2調整ピストン22との間に導入されるように設定されている。   Next, an operating rod 16 is provided between the first valve body 6 and the second valve body 7. The operating rod 16 passes through the center through hole 14 of the adjustment piston 11 and the second adjustment cylinder 21, and a flange portion 18 is formed between them, and a presser spring 20 is interposed between the flange portion 18 and the adjustment piston 11. Is provided. The operating rod 16 and the through hole at the bottom of the adjustment cylinder 4 are sealed by a seal ring. The operating rod 16 is provided with seal rings 27 and 28 for sealing a through hole 25 formed in the bottom 24 of the second adjustment cylinder 21 and a through hole 26 at the center of the second adjustment piston 22. The seal ring 28 of the second adjustment piston 22 is not sealed with the through hole 26 of the second adjustment piston 22 in the initial state. When the second valve body 7 moves the operating rod 16 to the extent that the seal ring 27 is removed, the seal is removed and the compressed air in the conduction space S passes through the through-hole 25 to the second adjustment cylinder 21. It is set to be introduced between the bottom 24 and the second adjustment piston 22.

以上の調整ピストン11と第2調整ピストン22と第1弁体6と第2弁体7と筒状ステム10と作動杆16は同軸上に配置されている。そして、作動杆16は押えバネ20により第2弁体7が二次圧側開口部3を閉じるように付勢されている。第2弁体7が押えバネ20に抗して一定の移動量を越えて作動すると、作動杆16の先端が第1弁体6に係合し、さらに第1弁体6を押し出して一次圧側開口部2を開くようになっている。   The adjustment piston 11, the second adjustment piston 22, the first valve body 6, the second valve body 7, the cylindrical stem 10 and the operating rod 16 are arranged coaxially. The operating rod 16 is urged by the presser spring 20 so that the second valve body 7 closes the secondary pressure side opening 3. When the second valve body 7 is operated over a certain amount of movement against the presser spring 20, the tip of the operating rod 16 is engaged with the first valve body 6, and further, the first valve body 6 is pushed out to the primary pressure side. The opening 2 is opened.

次に、上記圧力調整機構と第2弁体7との間の導通空間Sに臨んで安全弁30が配置されている。すなわち、詳しくは図2に示されるように、ハウジング1bの側壁31に貫通形成された小孔32に開口したバルブハウジング33内に安全弁体34が摺動自在に配置され、安全弁体34はその後背部からバネ35により上記小孔32を閉じるように付勢されている。上記小孔32の先端両側にはOリング36が配置されている。なお、上記バネ35のバネ力は、所定圧、つまり後述の低圧用プラグ(53)に供給されるべき低圧に対応するように設定され、小孔32に所定圧を越えた圧力が供給されたときは、安全弁体34が後退して小孔32を排気用スリット37を介して大気に開放するようになっている。   Next, the safety valve 30 is arranged facing the conduction space S between the pressure adjusting mechanism and the second valve body 7. That is, as shown in detail in FIG. 2, a safety valve body 34 is slidably disposed in a valve housing 33 opened in a small hole 32 formed through the side wall 31 of the housing 1b. The small hole 32 is biased by the spring 35. O-rings 36 are disposed on both ends of the small hole 32. The spring force of the spring 35 is set to correspond to a predetermined pressure, that is, a low pressure to be supplied to a low pressure plug (53) described later, and a pressure exceeding the predetermined pressure is supplied to the small hole 32. In some cases, the safety valve body 34 is retracted to open the small hole 32 to the atmosphere through the exhaust slit 37.

また、上記小孔32の先端開口部は可動スリーブ38によって閉じられている。可動スリーブ38内側には突起40が形成され、この突起40は第2弁体7の側面の肩部に係合している。また、可動スリーブ38はバネ41によって二次圧側に付勢されている。これにより、可動スリーブ38は常時第2弁体7と連動するように構成されている。さらに、可動スリーブ38には横穴42が形成されている。この横穴42は、第2弁体7が後述の低圧用プラグ53が接続され、押し出され移動したときに、上記小孔32と連通するように構成されている。   Further, the tip opening of the small hole 32 is closed by a movable sleeve 38. A protrusion 40 is formed on the inner side of the movable sleeve 38, and this protrusion 40 is engaged with the shoulder on the side surface of the second valve body 7. Further, the movable sleeve 38 is biased to the secondary pressure side by the spring 41. Thereby, the movable sleeve 38 is configured to always work with the second valve body 7. Further, a lateral hole 42 is formed in the movable sleeve 38. The lateral hole 42 is configured to communicate with the small hole 32 when the second valve body 7 is connected to a low-pressure plug 53 to be described later and pushed and moved.

なお、この場合の圧縮空気供給装置の導通空間S内の圧力は、調圧バネ15のバネ力を小さくして低圧となるように設定されている。   In this case, the pressure in the conduction space S of the compressed air supply device is set so that the spring force of the pressure adjusting spring 15 is reduced to a low pressure.

次に、上記二次圧側開口部3にはカプラ9が設けられている。このカプラ9には、筒状作動部材43とロック用ボール44を落とし込み可能な穴を有する筒部45と、ロック用ボール44をロック又はロック解除状態にする筒状体46とが設けられている。作動部材43は軸方向に沿って移動可能で、内面に上記筒状ステム10の外面に形成された突部51に係合可能な突部52を備えている。なお、47、48、49は上記各部材を突出方向に付勢するバネである。   Next, a coupler 9 is provided in the secondary pressure side opening 3. The coupler 9 is provided with a cylindrical portion 45 having a hole into which the cylindrical operating member 43 and the locking ball 44 can be dropped, and a cylindrical body 46 that locks or unlocks the locking ball 44. . The actuating member 43 is movable along the axial direction, and has a protrusion 52 that can engage with a protrusion 51 formed on the outer surface of the cylindrical stem 10 on the inner surface. Reference numerals 47, 48, and 49 denote springs that urge the respective members in the protruding direction.

そこで、低圧用プラグ53と中間圧用プラグ54と高圧用プラグ55とを上記圧縮空気供給装置のカプラ9に接続した場合の作動態様について説明する。   An operation mode when the low pressure plug 53, the intermediate pressure plug 54, and the high pressure plug 55 are connected to the coupler 9 of the compressed air supply device will be described.

図1の初期状態(プラグを装着していない状態で、第2弁体7は一次側を二次側に対して遮断している状態)では、調整ピストン11は調圧バネ15により押圧されて押圧部12が第1弁体6を押し込むので、一次圧側開口部2から導通空間S内に圧縮空気が供給され、調整ピストン11の受圧面13に作用し、調整ピストン11を上記調圧バネ15に抗して押し戻す。このようにして、調整ピストン11は上記調圧バネ15の調圧バネ15力と受圧面13に対する力(受圧面積と圧力との積)とがバランスした位置で停止する。このため、上記調圧バネ15のバネ定数は所定の低圧に対応するように設定されている。なお、導通空間S内の圧力は圧力表示部に表示されるようになっている。   In the initial state of FIG. 1 (the state where the plug is not attached and the second valve body 7 is blocking the primary side from the secondary side), the adjustment piston 11 is pressed by the pressure adjusting spring 15. Since the pressing portion 12 pushes the first valve body 6, compressed air is supplied from the primary pressure side opening 2 into the conduction space S, acts on the pressure receiving surface 13 of the adjustment piston 11, and causes the adjustment piston 11 to move to the pressure adjustment spring 15. Push back against. In this way, the adjustment piston 11 stops at a position where the pressure adjusting spring 15 force of the pressure adjusting spring 15 and the force (product of pressure receiving area and pressure) on the pressure receiving surface 13 are balanced. For this reason, the spring constant of the pressure regulating spring 15 is set to correspond to a predetermined low pressure. The pressure in the conduction space S is displayed on the pressure display unit.

まず、図3のように低圧用プラグ53を接続したときは、プラグの先端が上記作動部材43を押し込んで突部51、52同士を係合させてステム10を押し込み、第2弁体7を開放作動させるとともに、作動杆16も移動させる。このときの作動杆16の移動量は、作動杆16のシールリング27は第2調整シリンダ21の底部24の貫通孔25から外れない程度に設定されている。したがって、導通空間S内の低圧の圧縮空気が供給される。   First, when the low-pressure plug 53 is connected as shown in FIG. 3, the tip of the plug pushes the operating member 43 to engage the protrusions 51, 52 to push the stem 10, and the second valve body 7 is moved. In addition to the opening operation, the operating rod 16 is also moved. The amount of movement of the operating rod 16 at this time is set such that the seal ring 27 of the operating rod 16 does not come off from the through hole 25 of the bottom 24 of the second adjustment cylinder 21. Therefore, the low-pressure compressed air in the conduction space S is supplied.

次に、中間圧用プラグ54を接続すると、図4に示されるように、その先端でステム10を直接に押し出して第2弁体7を開放作動させる。このときの第2弁体7の移動量は低圧用プラグ53を接続した場合よりも大きいので、第2弁体7とともに移動する作動杆16のシールリング27は第2調整シリンダ21の底部24の貫通孔25から外れる(このとき別のシールリング28は第2調整ピストン22の貫通孔26をシールしている)程度に設定されている。導通空間S内の圧縮空気は上記第2調整シリンダ21の底部24の貫通孔25から入り込む。このため、第2調整ピストン22の面(受圧面50)には上記圧縮空気の圧力が作用して、調圧バネ15とともに調整ピストン11を一次圧側に押圧して移動させるので、第1弁体6が開き、一次圧側開口部2から中間圧の圧縮空気が供給される。供給圧力が上記調圧バネ15力と第2調整ピストン22からの力との和に対応するほど高くなるまで第2弁体7は開き続け、所定の中間圧を越えると調整ピストン11の受圧面13に作用する力の方が強くなって第1弁体6は閉じる。このようにして、調圧バネ15のバネ力と第2調整ピストン22に作用する力の合計に対応した中間圧の圧縮空気が導通空間Sから中間圧用プラグ54に供給される。   Next, when the intermediate pressure plug 54 is connected, as shown in FIG. 4, the stem 10 is directly pushed out at its tip to open the second valve body 7. Since the amount of movement of the second valve body 7 at this time is larger than that when the low-pressure plug 53 is connected, the seal ring 27 of the operating rod 16 that moves together with the second valve body 7 is provided on the bottom 24 of the second adjustment cylinder 21. It is set to such an extent that it is removed from the through hole 25 (at this time, another seal ring 28 seals the through hole 26 of the second adjustment piston 22). The compressed air in the conduction space S enters from the through hole 25 in the bottom 24 of the second adjustment cylinder 21. For this reason, the pressure of the compressed air acts on the surface (pressure receiving surface 50) of the second adjustment piston 22, and the adjustment piston 11 is pressed and moved together with the pressure adjusting spring 15 to move the first valve body. 6 is opened, and compressed air of intermediate pressure is supplied from the primary pressure side opening 2. The second valve body 7 continues to open until the supply pressure becomes high enough to correspond to the sum of the force of the pressure adjusting spring 15 and the force from the second adjusting piston 22, and when the predetermined intermediate pressure is exceeded, the pressure receiving surface of the adjusting piston 11 The force acting on 13 becomes stronger and the first valve body 6 closes. In this way, compressed air having an intermediate pressure corresponding to the sum of the spring force of the pressure adjusting spring 15 and the force acting on the second adjusting piston 22 is supplied from the conduction space S to the intermediate pressure plug 54.

さらに、図5に示されるように、高圧用プラグ55を接続すると、その先端でステム10を直接に押し出して第2弁体7を開放作動させるが、このときの第2弁体7と作動杆16の移動量は最も大きいので、作動杆16は直接に第1弁体6を押し込む。このため、高圧の一次圧の圧縮空気がダイレクトにプラグに供給される。   Further, as shown in FIG. 5, when the high-pressure plug 55 is connected, the stem 10 is directly pushed out at the tip thereof to open the second valve body 7, and the second valve body 7 and the operating rod at this time are operated. Since the movement amount of 16 is the largest, the operating rod 16 directly pushes in the first valve body 6. For this reason, high-pressure primary compressed air is directly supplied to the plug.

したがって、上記圧縮空気供給装置の構成によれば、同じカプラ9に低圧用プラグ53と中間圧用プラグ54と高圧用プラグ55とを装着した場合に、それぞれに所定の圧力の圧縮空気を供給することができる。   Therefore, according to the configuration of the compressed air supply device, when the low pressure plug 53, the intermediate pressure plug 54, and the high pressure plug 55 are attached to the same coupler 9, compressed air having a predetermined pressure is supplied to each. Can do.

上述のように、上記3種類のプラグを装着したときの第2弁体7と作動杆16の移動量は、低圧用プラグ53を装着したときの移動量が最も小さく(シールリング27が外れない程度)、次に中間圧用プラグ54を装着したときの移動量が大きく(シールリング27が外れる程度)、高圧用プラグ55を装着したときに最も大きく、上記一定の移動量を越えて作動杆16が第1弁体6を押し込む程度となるように設定されている。   As described above, the movement amount of the second valve body 7 and the operating rod 16 when the three types of plugs are attached is the smallest when the low pressure plug 53 is attached (the seal ring 27 does not come off). Next, the amount of movement when the intermediate pressure plug 54 is mounted is large (the degree to which the seal ring 27 is detached), the largest when the high pressure plug 55 is mounted, and the operating rod 16 exceeds the certain amount of movement. Is set so as to push the first valve body 6.

そして、低圧用プラグ53を接続したとき、図6に示されるように、可動スリーブ38が第2弁体7とともに作動し、導通空間Sと可動スリーブ38の横穴42と小孔32とが連通する。このため、導通空間S内の圧縮空気は安全弁体34の先端を押圧するが、上記圧縮空気が所定圧内であれば、安全弁体34は作動しない。なお、中間圧用プラグ54と高圧用プラグ55が接続したときは、図4および図5に示されるように、可動スリーブ38の横穴42は上記小孔32のOリング36を越えるので、小孔32は閉じた状態になっている。   When the low pressure plug 53 is connected, as shown in FIG. 6, the movable sleeve 38 operates together with the second valve body 7, and the conduction space S communicates with the lateral hole 42 and the small hole 32 of the movable sleeve 38. . For this reason, the compressed air in the conduction space S presses the tip of the safety valve element 34, but the safety valve element 34 does not operate if the compressed air is within a predetermined pressure. When the intermediate pressure plug 54 and the high pressure plug 55 are connected, the lateral hole 42 of the movable sleeve 38 exceeds the O-ring 36 of the small hole 32 as shown in FIGS. Is closed.

ところで、圧力調整機構のバネが折損したり、Oリング36が破損したりすることにより、何らかの不測の原因により一次圧の圧縮空気が二次圧側に流れ込む状態になっている場合は、圧力表示部で内部圧力が異常であることを知ることができる。しかし、これを見落として低圧用プラグ53を接続してしまう可能性がある。   By the way, if the spring of the pressure adjusting mechanism is broken or the O-ring 36 is broken, the compressed air of the primary pressure flows into the secondary pressure side due to some unforeseen cause. It is possible to know that the internal pressure is abnormal. However, there is a possibility that the low voltage plug 53 may be connected by overlooking this.

ところが、このような場合であっても、低圧用プラグ53を接続すると、導通空間Sと可動スリーブ38の横穴42と小孔32とが連通し、導通空間S内の高圧の圧縮空気は安全弁30に供給され、安全弁体34の先端を押圧して安全弁体34を後退させる。これにより、導通空間S内の圧縮空気は排気スリット37から大気に放出され、導通空間Sは減圧する。このため、一次圧が直接に低圧用プラグ53に供給されることを有効に防止することができ、危険を回避して安全を確保することができる。   However, even in such a case, when the low-pressure plug 53 is connected, the conduction space S, the lateral hole 42 of the movable sleeve 38 and the small hole 32 communicate with each other, and the high-pressure compressed air in the conduction space S is the safety valve 30. The safety valve body 34 is moved backward by pressing the tip of the safety valve body 34. Thereby, the compressed air in the conduction space S is released from the exhaust slit 37 to the atmosphere, and the conduction space S is depressurized. For this reason, it is possible to effectively prevent the primary pressure from being directly supplied to the low-pressure plug 53, and it is possible to avoid danger and ensure safety.

次に、第2弁体7は、低圧用プラグ53を接続したときにのみ、作動部材43を押し込んで突部51、52同士を係合させてステム10を押し込むことによって開き作動するように構成されている。   Next, only when the low pressure plug 53 is connected, the second valve body 7 is configured to open and operate by pushing the operating member 43 and engaging the protrusions 51 and 52 to push the stem 10. Has been.

そこで、上記作動部材43を利用して次のように安全機構を構成してもよい。なお、以下の図において一次圧側の圧力調整機構の作動は、図1〜図5に示したものと同じなので省略する。また、安全弁の構成も同じなので、その説明も省略する。すなわち、図7に示されるように、安全弁30は第2弁体7の二次圧側に配置されている。ハウジングの側壁31に貫通形成された小孔32に開口したバルブハウジング33内に安全弁体34が摺動自在に配置され、後背部からバネ35により上記小孔32を閉じるように付勢されている。上記小孔32の先端両側にはOリング36が配置されている。なお、上記バネ35のバネ力は、所定圧、つまり後述の低圧用プラグ53に供給されるべき低圧に対応するように設定され、小孔32に所定圧を越えた圧力が供給されたときは、安全弁体34が後退して小孔32を排気用スリット37を介して大気に開放するようになっている。   Therefore, the safety mechanism may be configured as follows using the operating member 43. In the following drawings, the operation of the pressure adjustment mechanism on the primary pressure side is the same as that shown in FIGS. Moreover, since the structure of a safety valve is also the same, the description is also abbreviate | omitted. That is, as shown in FIG. 7, the safety valve 30 is disposed on the secondary pressure side of the second valve body 7. A safety valve element 34 is slidably disposed in a valve housing 33 opened in a small hole 32 penetratingly formed in the side wall 31 of the housing, and urged to close the small hole 32 by a spring 35 from the back. . O-rings 36 are disposed on both ends of the small hole 32. The spring force of the spring 35 is set so as to correspond to a predetermined pressure, that is, a low pressure to be supplied to a low pressure plug 53 described later, and when a pressure exceeding the predetermined pressure is supplied to the small hole 32. The safety valve body 34 is retracted to open the small hole 32 to the atmosphere through the exhaust slit 37.

また、上記小孔32の先端開口部は筒状の作動部材43によって閉じられている。作動部材43には横穴42が形成されている。この横穴42は、第2弁体が後述の低圧用プラグ53が接続されたときに押し出されて移動したときに上記小孔32と連通するように構成されている。   Further, the tip opening of the small hole 32 is closed by a cylindrical actuating member 43. A lateral hole 42 is formed in the operating member 43. The lateral hole 42 is configured to communicate with the small hole 32 when the second valve body is pushed out and moved when a low-pressure plug 53 described later is connected.

この場合も、低圧用プラグ53を接続したとき、図8に示されるように、作動部材43が作動し、導通空間Sと作動部材43の横穴42と小孔32とが連通する。このため、導通空間S内の圧縮空気は安全弁体34の先端を押圧するが、上記圧縮空気が所定圧内であれば、安全弁体34は作動しない。なお、中間圧用プラグ54と高圧用プラグ55が接続したときは、可動スリーブ38の横穴42は動かないので、小孔32は閉じた状態になっている。   Also in this case, when the low-pressure plug 53 is connected, as shown in FIG. 8, the operating member 43 operates, and the conduction space S communicates with the lateral hole 42 and the small hole 32 of the operating member 43. For this reason, the compressed air in the conduction space S presses the tip of the safety valve element 34, but the safety valve element 34 does not operate if the compressed air is within a predetermined pressure. When the intermediate pressure plug 54 and the high pressure plug 55 are connected, the lateral hole 42 of the movable sleeve 38 does not move, so that the small hole 32 is closed.

これに対し、圧力調整機構のバネが折損したり、Oリングが破損したりすることにより、何らかの不測の原因により一次圧の圧縮空気が二次圧側に流れ込む状態になっている場合に低圧用プラグ53を接続すると、図8のように導通空間Sと作動部材43の横穴42と小孔32とが連通し、導通空間S内の高圧の圧縮空気は安全弁30に供給され、安全弁体34の先端を押圧して安全弁体34をバネ35に抗して後退させる。これにより、導通空間S内の圧縮空気は排気スリット37から大気に放出され、導通空間Sは減圧する。このため、一次圧が直接に低圧用プラグ53に供給されることを有効に防止することができる。したがって、危険を回避して安全を確保することができる。   On the other hand, when the pressure adjustment mechanism spring breaks or the O-ring breaks, the primary pressure compressed air flows into the secondary pressure side due to some unforeseen cause. When 53 is connected, the conduction space S communicates with the lateral hole 42 and the small hole 32 of the actuating member 43 as shown in FIG. 8, and high-pressure compressed air in the conduction space S is supplied to the safety valve 30, And the safety valve element 34 is retracted against the spring 35. Thereby, the compressed air in the conduction space S is released from the exhaust slit 37 to the atmosphere, and the conduction space S is depressurized. For this reason, it is possible to effectively prevent the primary pressure from being directly supplied to the low pressure plug 53. Therefore, it is possible to avoid danger and ensure safety.

なお、図9に示されるように、中間圧用プラグ54を接続した場合と図10のように高圧用プラグ55を接続した場合は、横穴42と小孔32とは連通しないようになっている。   As shown in FIG. 9, when the intermediate pressure plug 54 is connected and when the high pressure plug 55 is connected as shown in FIG. 10, the lateral hole 42 and the small hole 32 do not communicate with each other.

上述のように、圧縮空気供給装置の安全機構内部の部品に破損等があって低圧用プラグに所定圧を越える規格外の高圧が供給されたときは、速やかに大気に放出して危険を回避して安全を確保することができる。   As mentioned above, when a part inside the safety mechanism of the compressed air supply device is damaged and a high pressure outside the standard exceeding the specified pressure is supplied to the low pressure plug, it is quickly released to the atmosphere to avoid danger. To ensure safety.

なお、本発明に係る安全機構は、低圧用プラグが作動したときにのみ、導通空間内の圧縮空気を安全弁に供給する構成であればよく、上述の実施形態に限定されない。   The safety mechanism according to the present invention is not limited to the above-described embodiment as long as it is configured to supply the compressed air in the conduction space to the safety valve only when the low-pressure plug is activated.

また、1つのカプラに接続できるプラグも3種類に限定されない。2種類でも、4種類以上でもよい。   Also, the number of plugs that can be connected to one coupler is not limited to three. Two types or four or more types may be used.

本発明に係る圧縮空気供給装置の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the compressed air supply apparatus which concerns on this invention. 図1の安全弁部分の拡大図である。It is an enlarged view of the safety valve part of FIG. 上記圧縮空気供給装置に低圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the low pressure plug to the said compressed air supply apparatus. 上記圧縮空気供給装置に中間圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the plug for intermediate pressures to the said compressed air supply apparatus. 上記圧縮空気供給装置に高圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the high pressure plug to the said compressed air supply apparatus. 上記圧縮空気供給装置に低圧用プラグを装着した場合の安全弁部分の拡大図である。It is an enlarged view of a safety valve portion when a low pressure plug is attached to the compressed air supply device. 他の安全弁を備えた圧縮空気供給装置の一部の断面図である。It is sectional drawing of a part of compressed air supply apparatus provided with the other safety valve. 上記圧縮空気供給装置に低圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the low pressure plug to the said compressed air supply apparatus. 上記圧縮空気供給装置に中間圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the plug for intermediate pressures to the said compressed air supply apparatus. 上記圧縮空気供給装置に高圧用プラグを装着した場合の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment at the time of attaching the high pressure plug to the said compressed air supply apparatus.

符号の説明Explanation of symbols

2 一次圧側開口部
3 二次圧側開口部
4 調整シリンダ
6 第1弁体
7 第2弁体
9 カプラ
10 ステム
15 調圧バネ
32 小孔
34 安全弁体
37 排気用スリット
38 可動スリーブ
43 作動部材
53 低圧用プラグ
54 中間圧用プラグ
55 高圧用プラグ
2 Primary pressure side opening 3 Secondary pressure side opening 4 Adjustment cylinder 6 First valve body 7 Second valve body 9 Coupler 10 Stem 15 Pressure regulating spring 32 Small hole 34 Safety valve body 37 Exhaust slit 38 Movable sleeve 43 Actuating member 53 Low pressure Plug 54 Intermediate pressure plug 55 High pressure plug

Claims (3)

圧縮空気供給装置本体の一側に圧縮空気供給源に通じる一次圧側開口部を、他側に接続機器用カプラに通じる二次圧側開口部を形成し、両開口部間に圧縮空気の導通空間を形成するとともに、圧縮空気供給装置本体の一次圧側には圧力調整機構を設け、二次圧側開口部には低圧用プラグと第一の高圧用プラグと第二の高圧用プラグとを接続させるカプラを設け、中間には上記圧力調整機構によって調圧された圧縮空気を二次圧側に開放遮断する弁体を設け、上記圧力調整機構を作動させて上記各プラグに応じた空気圧の圧縮空気を供給するようにした圧縮空気供給装置において、
所定圧を超える圧縮空気を大気に開放する安全弁を上記導通空間に対して開閉自在に配置し、上記安全弁を備えたハウジングには上記導通空間に通じる小孔を形成し、この小孔を上記導通空間側に設けた可動スリーブで塞ぐとともに、該可動スリーブには上記小孔と連通可能な横穴を形成し、上記可動スリーブが上記低圧用プラグの接続に伴い押し込まれるように作動したときにのみ、上記横穴と小孔とが連通し、上記導通空間内の圧縮空気の空気圧が上記所定圧を超えたときに、上記空気圧が上記安全弁を開いて大気に放出されるようにした
ことを特徴とする圧縮空気供給装置の安全機構。
A primary pressure side opening that leads to the compressed air supply source is formed on one side of the compressed air supply device body, and a secondary pressure side opening that leads to the coupler for the connected device is formed on the other side. In addition, a pressure adjusting mechanism is provided on the primary pressure side of the compressed air supply device body, and a coupler that connects the low pressure plug, the first high pressure plug, and the second high pressure plug to the secondary pressure side opening. Provided in the middle is a valve body that opens and shuts down the compressed air adjusted by the pressure adjusting mechanism to the secondary pressure side, and operates the pressure adjusting mechanism to supply compressed air of pneumatic pressure corresponding to each plug. In the compressed air supply device as described above,
A safety valve that opens compressed air that exceeds a predetermined pressure to the atmosphere is disposed so as to be openable and closable with respect to the conduction space, and a small hole that communicates with the conduction space is formed in a housing that includes the safety valve. It is closed with a movable sleeve provided on the space side, and the movable sleeve is formed with a lateral hole that can communicate with the small hole, and only when the movable sleeve is operated to be pushed in with the connection of the low-pressure plug . The lateral hole communicates with the small hole, and when the air pressure of the compressed air in the conduction space exceeds the predetermined pressure, the air pressure is opened to the atmosphere by opening the safety valve. A safety mechanism for a compressed air supply device.
上記各プラグの接続時に上記弁体を異なる移動量だけ移動させて一次圧側と二次圧側とを開放し、上記弁体の移動量に応じて上記圧力調整機構を作動させて上記各プラグに応じた空気圧の圧縮空気を供給するようにした圧縮空気供給装置において、上記低圧用プラグの接続に伴い上記弁体を押し出し移動させたときにのみ上記横穴と小孔とが連通するようにしたことを特徴とする、請求項1に記載の圧縮空気供給装置の安全機構。 When the plugs are connected, the valve body is moved by a different amount of movement to open the primary pressure side and the secondary pressure side, and the pressure adjusting mechanism is operated according to the amount of movement of the valve body to correspond to each plug. In the compressed air supply device that supplies compressed air of high air pressure, the lateral hole and the small hole communicate with each other only when the valve body is pushed and moved in connection with the connection of the low pressure plug. The safety mechanism of the compressed air supply device according to claim 1, wherein the safety mechanism is a feature. 上記カプラの上記導通空間側には、上記可動スリーブに代えて、上記低圧用プラグを接続したときにのみ作動する筒状の作動部材を設け、上記安全弁を、上記弁体の二次圧側に配置するとともに、上記小孔を上記作動部材で塞ぐとともに、該作動部材には上記小孔と連通可能な横穴を形成し、上記作動部材が上記低圧用プラグの接続に伴い押し込まれるように作動したときにのみ、上記横穴と小孔とが連通し、上記導通空間内の圧縮空気の空気圧が上記所定圧を超えたときに、上記空気圧が上記安全弁を開いて大気に放出されるようにしたことを特徴とする、請求項1に記載の圧縮空気供給装置の安全機構。 Instead of the movable sleeve, a cylindrical actuating member that operates only when the low pressure plug is connected is provided on the conducting space side of the coupler, and the safety valve is disposed on the secondary pressure side of the valve body. In addition, the small hole is closed with the operating member, and a horizontal hole that can communicate with the small hole is formed in the operating member , and the operating member is operated to be pushed in with the connection of the low pressure plug. Only when the lateral hole and the small hole communicate with each other, and the air pressure of the compressed air in the conduction space exceeds the predetermined pressure, the air pressure is opened to the atmosphere by opening the safety valve. The safety mechanism of the compressed air supply device according to claim 1, wherein the safety mechanism is a feature.
JP2005231117A 2005-08-09 2005-08-09 Safety mechanism for compressed air supply equipment Active JP4517977B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004019535A (en) * 2002-06-14 2004-01-22 Max Co Ltd Compressed air feeder
JP2004036401A (en) * 2002-06-28 2004-02-05 Tokico Ltd Air compressor and adapter joint for low pressure used therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3528591B2 (en) * 1998-04-24 2004-05-17 マックス株式会社 Air pressure regulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004019535A (en) * 2002-06-14 2004-01-22 Max Co Ltd Compressed air feeder
JP2004036401A (en) * 2002-06-28 2004-02-05 Tokico Ltd Air compressor and adapter joint for low pressure used therefor

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