JP2016070384A - Valve device and air tool with valve device - Google Patents

Valve device and air tool with valve device Download PDF

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JP2016070384A
JP2016070384A JP2014200791A JP2014200791A JP2016070384A JP 2016070384 A JP2016070384 A JP 2016070384A JP 2014200791 A JP2014200791 A JP 2014200791A JP 2014200791 A JP2014200791 A JP 2014200791A JP 2016070384 A JP2016070384 A JP 2016070384A
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fluid passage
opening
valve
closing operation
closing
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JP6423224B2 (en
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大心 今井
Taishin Imai
大心 今井
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Nitto Kohki Co Ltd
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Nitto Kohki Co Ltd
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Priority to JP2014200791A priority Critical patent/JP6423224B2/en
Priority to TW104129215A priority patent/TWI555916B/en
Priority to KR1020150135560A priority patent/KR101767739B1/en
Priority to CN201510626783.9A priority patent/CN105459034B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Lift Valve (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sliding Valves (AREA)
  • Portable Power Tools In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To cause a valve body of a valve device to be positively displaced between a released position and a closed position through operation of a valve operating element.SOLUTION: This invention comprises: a fluid passage element 26; an opening or closing operation element 28 extending through the fluid passage element 26 in its crossing direction to be enabled to displace between a closed position and a released position; and a valve operating element 30 that can be displaced on an outer peripheral surface of the fluid passage element 26 between an OFF position and an ON position and having, at its inner peripheral surface, a pushing cam contour curved line part 36 slidingly engaged with one end 28b of an opening or closing operation element 28 and a returning cam contour curved line part 38 slidingly engaged with the other end 28c of the opening or closing operation element 28. The opening or closing operation element 28 is moved between the ON position and the OFF position of the valve operating element 30 and is moved by these cam contour curved line parts between the released position and the closing position.SELECTED DRAWING: Figure 6

Description

本発明はエア式のグラインダーなどの流体作動工具において圧縮空気などの作動流体を通す流体通路の開閉を行うための弁装置及び該弁装置を備えた流体作動工具、特に、エア工具に関する。   The present invention relates to a valve device for opening and closing a fluid passage through which a working fluid such as compressed air passes in a fluid working tool such as an air grinder, and more particularly to a fluid working tool including the valve device, in particular, an air tool.

例えば特開２００４−２０９５９６号（特許文献１）は、圧縮空気源（エアポンプ）からの圧縮空気を受け入れてエアモータに供給し研磨部材を回転して研磨作業を行うようにしたグラインダーを開示している。このグラインダーは、バネ付勢されて圧縮空気の流体通路を閉止している弁体を備え、研磨作業を行う場合には、作業者が弁操作エレメントをＯＦＦ（不作動）位置からＯＮ（作動）位置とすることにより弁体に接続されている弁作動ピンを閉止位置から開放位置に変位させて当該弁体をバネ付勢力に抗して流体通路閉止位置から流体通路開放位置に変位させ圧縮空気をエアモータに供給して研磨部材を回転するようになっている。研磨作業を中断若しくは終了するときには、作業者が弁操作エレメントをＯＮ位置からＯＦＦ位置に戻すことにより、弁体が上記バネ付勢力により流体通路閉止位置に戻され、それに伴い、弁作動ピンも開放位置から閉止位置に戻されるようになっている。   For example, Japanese Unexamined Patent Application Publication No. 2004-209596 (Patent Document 1) discloses a grinder that receives compressed air from a compressed air source (air pump), supplies the compressed air to an air motor, and rotates a polishing member to perform a polishing operation. . This grinder includes a valve body that is biased by a spring and closes a fluid passage for compressed air. When performing a polishing operation, an operator turns the valve operating element from an OFF (non-operation) position to ON (operation). The valve operating pin connected to the valve body is displaced from the closed position to the open position by setting the position, and the valve body is displaced from the fluid passage closed position to the fluid passage open position against the spring biasing force. Is supplied to an air motor to rotate the polishing member. When the polishing operation is interrupted or terminated, the operator returns the valve operating element from the ON position to the OFF position, whereby the valve body is returned to the fluid passage closed position by the spring biasing force, and the valve operating pin is also opened accordingly. The position is returned to the closed position.

特開２００４−２０９５９６号JP 2004-209596 A

上述のグラインダーのような流体作動工具においては、塵などの異物が弁装置に入り込んで弁作動ピンの動きが悪くなり、弁操作エレメントをＯＦＦ位置に戻しても、バネ付勢力では当該弁体が流体通路閉止位置に戻れないことが生じ得る。   In a fluid operation tool such as the grinder described above, foreign matter such as dust enters the valve device, the movement of the valve operation pin becomes worse, and even when the valve operating element is returned to the OFF position, It may occur that the fluid passage cannot be returned to the closed position.

本発明は、このような点に鑑み、弁操作エレメントをＯＮ位置からＯＦＦ位置に戻すことに伴い、流体通路開放位置にある弁体を流体通路閉止位置に強制的に戻すためのカム機構を備える弁装置及び該弁装置を備えた流体作動工具、特に、エア工具を提供することを目的とするものである。   In view of such a point, the present invention includes a cam mechanism for forcibly returning the valve element in the fluid passage opening position to the fluid passage closing position as the valve operating element is returned from the ON position to the OFF position. An object of the present invention is to provide a valve device and a fluid working tool including the valve device, particularly an air tool.

すなわち、本発明は
流体通路を有する流体通路エレメントと、
該流体通路エレメントに取り付けられ、該流体通路を閉止するための閉止位置と該閉止位置から該流体通路の横断方向で押し込まれて該流体通路を開放するための開放位置との間で変位可能とされた開閉作動エレメントと、
該流体通路エレメントの外周面上でＯＦＦ位置とＯＮ位置との間で変位可能とされ、該ＯＮ位置から該ＯＦＦ位置に変位されるときに該流体通路エレメントから外部に突出している該開閉作動エレメントの端部に摺動係合して該開閉作動エレメントを該開放位置から該閉止位置に戻すように構成された戻しカム輪郭曲線部を備える弁操作エレメントと
を有する弁装置を提供する。 That is, the present invention provides a fluid passage element having a fluid passage,
Attached to the fluid passage element and displaceable between a closed position for closing the fluid passage and an open position for pushing the fluid passage transversely from the closed position to open the fluid passage. Open / close actuated element,
The opening / closing operation element that is displaceable between the OFF position and the ON position on the outer peripheral surface of the fluid passage element, and projects outward from the fluid passage element when the fluid passage element is displaced from the ON position to the OFF position. And a valve operating element having a return cam contour curve portion configured to slidably engage with an end of the valve and return the opening / closing operation element from the open position to the closed position.

この弁装置ではカム機構を用いて開閉作動エレメントを開放位置から確実に閉止位置に戻すようにし、上述のような問題を解消するものである。   In this valve device, a cam mechanism is used to reliably return the opening / closing operation element from the open position to the closed position, thereby solving the above-described problems.

具体的には、
該開閉作動エレメントが該流体通路エレメントを該横断方向で貫通して延びるよう構成され、該戻しカム輪郭曲線部に摺動係合される該端部と、該端部の反対側の他端部とを有し、
該弁操作エレメントは、該ＯＦＦ位置から該ＯＮ位置に向かって変位されるときに、該開閉作動エレメントの該他端部に摺動係合して該開閉作動エレメントを該閉止位置から該開放位置に変位させるように構成された押し込みカム輪郭曲線部を備えるようにすることができる。 In particular,
The opening / closing actuating element extending through the fluid passage element in the transverse direction and slidingly engaged with the return cam profile curve, and the other end opposite to the end And
When the valve operating element is displaced from the OFF position toward the ON position, the valve operating element is slidably engaged with the other end of the opening / closing operation element to move the opening / closing operation element from the closed position to the open position. And a pushing cam contour curve portion configured to be displaced to a predetermined distance.

開閉作動エレメントの一端に戻しカム輪郭曲線部を、他端に押し込みカム輪郭曲線部を摺動係合させることにより、開閉作動エレメントの開放位置及び閉止位置の間での変位を確実に行えるようにするものである。   By sliding and engaging the cam contour curve portion at one end of the opening / closing operation element and the pushing cam contour curve portion at the other end, the displacement between the open position and the closing position of the opening / closing operation element can be reliably performed. To do.

より具体的には、
該弁操作エレメントが該流体通路エレメントの長手軸線を中心にする周方向で該ＯＦＦ位置と該ＯＮ位置との間で変位可能とすることができる。 More specifically,
The valve operating element may be displaceable between the OFF position and the ON position in a circumferential direction around the longitudinal axis of the fluid passage element.

また、別の例では、
該弁操作エレメントが該流体通路エレメントの長手軸線に平行な方向で該ＯＦＦ位置と該ＯＮ位置との間で変位可能とすることもできる。この場合、押し込みカム輪郭曲線部及び戻しカム輪郭曲線部が開閉作動エレメントの端部と摺動係合して開閉作動エレメントを変位させる部分は曲線に限らず直線とすることも可能である。 In another example,
The valve operating element may be displaceable between the OFF position and the ON position in a direction parallel to the longitudinal axis of the fluid passage element. In this case, the portion where the pushing cam contour curve portion and the return cam contour curve portion are slidably engaged with the end portion of the opening / closing operation element to displace the opening / closing operation element is not limited to the curve, and may be a straight line.

以上の弁装置においては、
該開閉作動エレメントが該流体通路を開閉するための弁体とされ、該閉止位置にあるときは該流体通路を閉止し、該開放位置にあるときは該流体通路を開放するようにすることができる。
具体的には、
該開閉作動エレメントとしての該弁体が、該閉止位置にあるときに該流体通路を閉止するサイズとされた閉止部と、該開放位置にあるときに該流体通路の中央部分を該横断方向で伸長する開放部であって、流体が該開放部の両側を通って流れることを許容するサイズとされている開放部とを有するようにすることができる。 In the above valve device,
The opening / closing operation element is a valve body for opening and closing the fluid passage, and the fluid passage is closed when in the closed position, and the fluid passage is opened when in the open position. it can.
In particular,
When the valve body as the opening / closing operation element is in the closed position, the closing portion is sized to close the fluid passage, and when in the open position, the central portion of the fluid passage is disposed in the transverse direction. An opening that extends, the opening being sized to allow fluid to flow through both sides of the opening.

別の例としては、
該開閉作動エレメントが該流体通路を開閉するための弁体を作動させるための部材であり、該閉止位置にあるときは該弁体を流体通路閉止位置とし、該開放位置にあるときは該弁体を流体通路開放位置とするようにすることができる。 Another example is
The opening / closing operation element is a member for operating a valve body for opening / closing the fluid passage. When the opening / closing operation element is in the closed position, the valve body is set as a fluid passage closed position, and when in the open position, the valve The body can be in a fluid passage open position.

本発明はまた、外部から圧縮空気を受け入れてエアモータに供給することにより該エアモータを駆動して作業を行うエア工具であって、上述の弁装置を備え、該弁装置における該流体通路エレメントの該流体通路を通して圧縮空気を該エアモータに供給するようにしたエア工具をも提供する。   The present invention is also an air tool for performing work by driving the air motor by receiving compressed air from the outside and supplying the compressed air to the air motor, and includes the above-described valve device, and the fluid passage element of the valve device. There is also provided an air tool adapted to supply compressed air to the air motor through a fluid passage.

以下、本発明に係る弁装置及び該弁装置を備えたエア工具の実施形態を添付図面に基づき説明する。   Embodiments of a valve device and an air tool including the valve device according to the present invention will be described below with reference to the accompanying drawings.

図1は本発明に係る弁装置が用いられているエア工具としてのグラインダーの縦断面図である。FIG. 1 is a longitudinal sectional view of a grinder as an air tool in which a valve device according to the present invention is used. 図２は図１のグラインダーの一部切り欠き平面図であり、円盤状研磨部材は省略して示している。FIG. 2 is a partially cutaway plan view of the grinder of FIG. 1, and the disk-shaped polishing member is omitted. 図３は流体通路閉止状態にある図１の弁装置を示す図であり、（ａ）は縦断面図、（ｂ）は（ａ）におけるＡ−Ａ線に沿って見た図、（ｃ）は（ａ）におけるＢ−Ｂ線に沿って見た図である。3 is a view showing the valve device of FIG. 1 in a closed state of the fluid passage, (a) is a longitudinal sectional view, (b) is a view taken along line AA in (a), (c). These are the figures seen along the BB line in (a). 図４は流体通路開放状態にある図１の弁装置を示す図であり、（ａ）は縦断面図、（ｂ）は（ａ）におけるＣ−Ｃ線に沿って見た図、（ｃ）は（ａ）におけるＤ−Ｄ線に沿って見た図である。4 is a view showing the valve device of FIG. 1 in a fluid passage open state, in which (a) is a longitudinal sectional view, (b) is a view taken along line CC in (a), and (c). These are the figures seen along the DD line in (a). 図５は図１の弁装置における筒状の弁操作エレメントをその長手軸線に平行な線に沿って切断し展開して当該弁操作エレメントの内面を示す展開図であり、（ａ）は弁装置が流体通路閉止状態にあるときの弁操作エレメントの内面、（ｂ）は弁操作エレメントが（ａ）の状態から変位されて当該弁装置を流体通路開放状態とするときの弁操作エレメントの内面を示す図である。FIG. 5 is a developed view showing the inner surface of the valve operating element by cutting the cylindrical valve operating element in the valve device of FIG. 1 along a line parallel to the longitudinal axis thereof, and (a) is a valve device. (B) shows the inner surface of the valve operating element when the valve operating element is displaced from the state of (a) to bring the valve device into the fluid passage open state. FIG. 図６は本発明の第２の実施形態に係る弁装置の流通通路閉止状態を示すであり、（ａ）は縦断面図、（ｂ）は（ａ）におけるＡ−Ａ線に沿って見た図、（ｃ）は（ａ）におけるＢ−Ｂ線に沿って見た図である。6A and 6B show a closed state of the flow passage of the valve device according to the second embodiment of the present invention. FIG. 6A is a longitudinal sectional view, and FIG. 6B is seen along the line AA in FIG. The figure (c) is the figure seen along the BB line in (a). 図７は本発明の第２の実施形態に係る弁装置の流通通路開放状態を示すであり、（ａ）は縦断面図、（ｂ）は（ａ）におけるＣ−Ｃ線に沿って見た図、（ｃ）は（ａ）におけるＤ−Ｄ線に沿って見た図である。7A and 7B show the open state of the flow passage of the valve device according to the second embodiment of the present invention, where FIG. 7A is a longitudinal sectional view, and FIG. 7B is seen along the line CC in FIG. FIG. 4C is a view taken along line DD in FIG.

図１及び図２に示すグラインダー１０は、図示しない圧縮空気源（エアポンプ）から供給される圧縮空気を受け入れる空気入口金具１２と、該空気入口金具１２に連結されてエアモータ１４への圧縮空気の供給・遮断を制御する本発明に係る弁装置１６と、エアモータ１４の出力シャフト１８からの回転駆動力を円盤状研磨部材２０に伝達する回転伝達部２２とを有している。グラインダー１０のエアモータ１４や回転伝達部２２などは広く知られているので、それらの詳細な説明は省略し、以下においては弁装置１６について説明する。   A grinder 10 shown in FIGS. 1 and 2 includes an air inlet fitting 12 that receives compressed air supplied from a compressed air source (air pump) (not shown), and supply of compressed air to the air motor 14 connected to the air inlet fitting 12. -It has the valve apparatus 16 based on this invention which controls interruption | blocking, and the rotation transmission part 22 which transmits the rotational drive force from the output shaft 18 of the air motor 14 to the disk shaped grinding | polishing member 20. FIG. Since the air motor 14 and the rotation transmission unit 22 of the grinder 10 are widely known, a detailed description thereof will be omitted, and the valve device 16 will be described below.

図３及び図４は図、空気入口金具１２が連結された状態の弁装置１６を示している。弁装置１６は、２つの筒状部材２６ａ、２６ｂが相互に同心状にしてねじ結合され、空気入口金具１２からエアモータ１４（図１）に至る流体通路２４を画定している流体通路エレメント２６と、該流体通路２４の開閉を行うための弁体２７と、該弁体２７に接続された細長い棒状の開閉作動エレメント２８と、該開閉作動エレメント２８を介して弁体２７の開閉操作を行うための筒状の弁操作エレメント３０とを有している。   3 and 4 show the valve device 16 in a state where the air inlet fitting 12 is connected. The valve device 16 includes a fluid passage element 26 having two cylindrical members 26a and 26b concentrically screwed together and defining a fluid passage 24 from the air inlet fitting 12 to the air motor 14 (FIG. 1). A valve body 27 for opening and closing the fluid passage 24, an elongated rod-shaped opening / closing operation element 28 connected to the valve body 27, and an operation for opening / closing the valve body 27 via the opening / closing operation element 28. And a cylindrical valve operating element 30.

弁体２７は円盤形状とされており、その中心に固定され前方に伸びる接続軸２７ａを有しており、該接続軸２７ａは開閉作動エレメント２８の長さ方向の中央に設けられた開口２８ａに摺動可能に挿通されている。開閉作動エレメント２８は流体通路エレメント２６をその横断方向で貫通するように設けられており、その端部２８ｂ、２８ｃがそれぞれ弁操作エレメント３０の内周面に設けられた押し込みカム輪郭曲線部３６と戻しカム輪郭曲線部３８とに摺動係合可能とされている。   The valve body 27 has a disk shape, and has a connecting shaft 27a that is fixed at the center and extends forward. The connecting shaft 27a is formed in an opening 28a provided at the center in the length direction of the opening / closing operation element 28. It is slidably inserted. The opening / closing operation element 28 is provided so as to penetrate the fluid passage element 26 in the transverse direction thereof, and its end portions 28b and 28c are respectively a pushing cam contour curve portion 36 provided on the inner peripheral surface of the valve operating element 30. The return cam contour curve portion 38 can be slidably engaged.

押し込みカム輪郭曲線部３６と戻しカム輪郭曲線部３８とは次のように構成されている。
弁操作エレメント３０を図３の（ｂ）に示す位置（ＯＦＦ位置）から図４の（ｂ）に示す位置（ＯＮ位置）に時計方向に回動するときには押し込みカム輪郭曲線部３６が開閉作動エレメント２８の端部２８ｂと摺動係合して開閉作動エレメント２８を図３の（ｂ）に示す位置（閉止位置）から図４の（ｂ）に示す位置（開放位置）に押し込み、それにより、弁体２７の接続軸２７ａが傾けられて当該弁体２７が図４の（ａ）に示すように一部（図示の例では上部）が弁座３４に係合した状態で傾斜して当該流体通路２４を開放する流体通路開放位置となる。
弁操作エレメント３０を図４の（ｂ）に示すＯＮ位置から図３の（ｂ）に示すＯＦＦ位置に反時計方向に回動するときには戻しカム輪郭曲線部３８が開閉作動エレメント２８の端部２８ｃと摺動係合して開閉作動エレメント２８を図４の（ｂ）に示す開放位置から図３の（ｂ）に示す閉止位置に戻し、それにより、弁体２７の接続軸２７ａが流体通路２４の長手軸線２４ｘに沿う位置となり、当該弁体２７が図３の（ａ）に示すように弁座３４に対して全面的に密封係合して当該流体通路２４を閉止する流体通路閉止位置となる。この状態で弁体２７は円錐コイルバネ４０により弁座３４に押圧されて弁座３４との密封係合を確実にされる。 The pushing cam contour curve portion 36 and the return cam contour curve portion 38 are configured as follows.
When the valve operating element 30 is rotated clockwise from the position shown in FIG. 3B (OFF position) to the position shown in FIG. 4B (ON position), the pushing cam contour curve portion 36 is opened and closed. 28 is slidably engaged with the end portion 28b of the 28, and the opening / closing operation element 28 is pushed from the position shown in FIG. 3B (closed position) to the position shown in FIG. 4B (open position), thereby The connecting shaft 27a of the valve body 27 is tilted, and the valve body 27 is tilted with a part (upper part in the illustrated example) engaged with the valve seat 34 as shown in FIG. The fluid passage opening position opens the passage 24.
When the valve operating element 30 is rotated counterclockwise from the ON position shown in FIG. 4B to the OFF position shown in FIG. 3B, the return cam contour curve portion 38 is the end portion 28 c of the opening / closing operation element 28. And the opening / closing operation element 28 is returned from the open position shown in FIG. 4B to the closed position shown in FIG. 3B, whereby the connecting shaft 27 a of the valve body 27 is connected to the fluid passage 24. A fluid passage closing position in which the valve body 27 is in full sealing engagement with the valve seat 34 to close the fluid passage 24 as shown in FIG. Become. In this state, the valve body 27 is pressed against the valve seat 34 by the conical coil spring 40 and the sealing engagement with the valve seat 34 is ensured.

図３の（ｂ）に示すように、押し込みカム輪郭曲線部３６の両端には凹部３６ａ、３６ｂが設けられている。凹部３６ａは、弁操作エレメント３０が図３の（ｂ）に示すＯＦＦ位置にあるときに、開閉作動エレメント２８の端部２８ｂを受け入れ、円錐コイルバネ４０はこの状態の開閉作動エレメント２８を弾性的に支持する。凹部３６ｂは、弁操作エレメント３０が図４の（ｂ）に示すＯＮ位置にあるときに、開閉作動エレメント２８の端部２８ｂを受け入れ、円錐コイルバネ４０はこの状態の開閉作動エレメント２８を弾性的に支持し、弁操作エレメント３０が不用意にＯＦＦ位置に回動しないように作用する。   As shown in FIG. 3B, concave portions 36a and 36b are provided at both ends of the pushing cam contour curve portion 36, respectively. The recess 36a receives the end 28b of the opening / closing operation element 28 when the valve operating element 30 is in the OFF position shown in FIG. 3B, and the conical coil spring 40 elastically moves the opening / closing operation element 28 in this state. To support. The recess 36b receives the end 28b of the opening / closing operation element 28 when the valve operating element 30 is in the ON position shown in FIG. 4B, and the conical coil spring 40 elastically moves the opening / closing operation element 28 in this state. The valve operating element 30 is supported to prevent it from being inadvertently rotated to the OFF position.

グラインダーなどの動力駆動工具では、当該工具をＯＦＦ状態（不作動状態）からＯＮ状態（作動状態）にするのに安全上、２つのステップの操作を通して行うことが法令上義務付けられている。このため図示のグラインダー１０でも、図３に示す流体通路閉止状態（すなわちＯＦＦ状態）から図４に示す流体通路開放状態（すなわちＯＮ状態）とするのに、これらの図から分かるように、弁操作エレメント３０を先ず当該流体通路２４の長手軸線２４ｘに平行に変位し（図示の例では弁操作エレメント３０を図３の（ａ）の状態から左方に変位して図４の（ａ）の状態とし（第１ステップ）、次に、上述のような流体通路２４の長手軸線２４ｘの周りの周方向での回動操作をする（第２ステップ）ことにより、ＯＦＦ状態からＯＮ状態とするようになっている。このため、弁操作エレメント３０はコイルバネ４２により図３の（ａ）で示す位置に付勢されており、ＯＦＦ状態からＯＮ状態にする場合には、このコイルバネ４２のバネ付勢力に抗して作業者が当該弁操作エレメント３０を軸線方向に動かし、その後で回動するようになっている。図５に示す展開図は、そのような２ステップ操作を行わせるための構成が示されている。すなわち、弁操作エレメント３０の内周面には凹部として形成した押し込みカム輪郭曲線部３６及び戻しカム輪郭曲線部３８の外に２ステップ操作のための２ステップ凹部４４が設けられている。この２ステップ凹部４４は、当該弁操作エレメント３０の長手軸線２４ｘに平行に伸びる軸線方向凹部４４ａと該軸線方向凹部４４ａに連接されて周方向に伸びる周方向凹部４４ｂ（図３の（ｃ）及び図４の（ｃ））とからなり、該２ステップ凹部４４に流体通路エレメント２６に取り付けられた規制ピン４６が摺動係合するようになっている。すなわち、弁操作エレメント３０が図１に示すＯＦＦ位置にあるときは、規制ピン４６が軸線方向凹部４４ａ内にあり、弁操作エレメント３０を図で見て左方に動かすことにより当該規制ピン４６が周方向凹部４４ｂ内に入り、該弁操作エレメント３０の回動を可能とするようになっている。   In a power drive tool such as a grinder, it is legally required to operate the tool through two steps for safety from the OFF state (non-operating state) to the ON state (operating state). Therefore, in the illustrated grinder 10 as well, as shown in these drawings, the valve operation is changed from the fluid passage closed state (ie, the OFF state) shown in FIG. 3 to the fluid passage open state (ie, the ON state) shown in FIG. The element 30 is first displaced parallel to the longitudinal axis 24x of the fluid passage 24 (in the example shown, the valve operating element 30 is displaced leftward from the state of FIG. 3A to the state of FIG. 4A). (First step), and then, the rotation operation in the circumferential direction around the longitudinal axis 24x of the fluid passage 24 as described above is performed (second step) so as to change from the OFF state to the ON state. Therefore, the valve operating element 30 is urged to the position shown in FIG. 3A by the coil spring 42. When the valve operating element 30 is switched from the OFF state to the ON state, the coil spring 42 is provided with a spring. The operator moves the valve operating element 30 in the axial direction against the force, and then rotates the valve operating element 30. The developed view shown in Fig. 5 is a configuration for performing such a two-step operation. That is, a two-step concave portion 44 for two-step operation is provided on the inner peripheral surface of the valve operating element 30 in addition to the pushing cam contour curve portion 36 and the return cam contour curve portion 38 formed as concave portions. The two-step recess 44 includes an axial recess 44a extending in parallel to the longitudinal axis 24x of the valve operating element 30 and a circumferential recess 44b extending in the circumferential direction connected to the axial recess 44a (see FIG. 3). 4 (c) and FIG. 4 (c)), the regulation pin 46 attached to the fluid passage element 26 is slidably engaged with the two-step recess 44. That is, when the valve operating element 30 is in the OFF position shown in FIG. 1, the restricting pin 46 is in the axial recess 44a, and the restricting pin 46 is moved by moving the valve operating element 30 leftward in the drawing. Enters the circumferential recess 44b to allow the valve operating element 30 to rotate.

図６及び図７に示す本発明の第２の実施形態に係る弁装置１６では、上述の第１の実施形態に係る弁装置１６における開閉作動エレメント２８を、流体通路２４を直接開閉する弁体として形成している。この開閉作動エレメントすなわち弁体２８と弁操作エレメント３０との相互作用関係は第１の実施形態のものと同じであり、弁操作エレメント３０は押し込みカム輪郭曲線部３６と戻しカム輪郭曲線部３８とを有し、当該弁操作エレメント３０の回動操作により、弁体２８が流体通路２４を閉止する閉止位置と開放する開放位置との間を変位させられるようになっている。具体的には、押し込みカム輪郭曲線部３６は、図６の（ｂ）において弁体２８の端部２８ｂが係合している位置から反時計方向に９０°の範囲にわたる曲線部分であり、戻しカム輪郭曲線部３８は弁体２８の反対側の端部２８ｃが係合している位置から反時計方向に９０°の範囲にわたる曲線部分である。押し込みカム輪郭曲線部３６と戻しカム輪郭曲線部３８とをつなぐ９０°の範囲は均一半径となっており、この部分は押し込みカム輪郭曲線部３６と戻しカム輪郭曲線部３８との製作を容易にすることを考慮したものである。   In the valve device 16 according to the second embodiment of the present invention shown in FIG. 6 and FIG. 7, the opening / closing operation element 28 in the valve device 16 according to the first embodiment described above is directly opened and closed by the fluid passage 24. It is formed as. The interaction relationship between the opening / closing operation element, that is, the valve body 28 and the valve operating element 30 is the same as that of the first embodiment. The valve operating element 30 includes a pushing cam contour curve portion 36 and a return cam contour curve portion 38. The valve element 28 can be displaced between a closed position where the fluid passage 24 is closed and an open position where the fluid passage 24 is opened by rotating the valve operating element 30. Specifically, the pushing cam contour curve portion 36 is a curved portion extending in a range of 90 ° counterclockwise from the position where the end portion 28b of the valve body 28 is engaged in FIG. The cam contour curve portion 38 is a curve portion extending in a range of 90 ° counterclockwise from the position where the opposite end portion 28c of the valve body 28 is engaged. The range of 90 ° connecting the push cam contour curve portion 36 and the return cam contour curve portion 38 has a uniform radius, and this portion facilitates the manufacture of the push cam contour curve portion 36 and the return cam contour curve portion 38. It is taken into consideration.

弁体２８は、当該弁体２８が閉止位置にあるときに流体通路２４と整合して該流体通路２４を閉止するサイズとされている閉止部２８−１と、該閉止部２８−１に連接され弁体２８が開放位置にあるときに流体通路２４と整合して流体の流れを許容するサイズとされている開放部２８−２と、該開放部２８−２に連接されて押し込みカム輪郭曲線部３６と摺動係合される頭部２８−３とを有している。開放部２８―２は、頭部２８−３と閉止部２８−１とを連結する細長い部材とされ、弁体２８が開放位置にあるときには、流体が該開放部２８−２の両側を通って流れるようなサイズとされている。   The valve body 28 is aligned with the fluid passage 24 when the valve body 28 is in the closed position, and has a closing portion 28-1 sized to close the fluid passage 24, and is connected to the closing portion 28-1. An opening 28-2 that is aligned with the fluid passage 24 and allows fluid flow when the valve body 28 is in the open position, and a pushing cam contour curve connected to the opening 28-2. It has a head portion 28-3 slidingly engaged with the portion 36. The opening portion 28-2 is an elongated member that connects the head portion 28-3 and the closing portion 28-1, and when the valve body 28 is in the open position, fluid passes through both sides of the opening portion 28-2. It is a flowing size.

以上、本発明に係る弁装置の実施形態を説明したが、本発明はこれらに限定されるものではなく、種々の変形が可能である。例えば、第２実施形態における弁体２８はいわゆるゲートバルブのように板状として、開放部２８−２には流体通路２４と略同じ面積を有する開口を設けるようにすることが出来る。また、弁操作エレメント３０は回動することにより開閉弁エレメント（弁体）２８を閉止位置と開放位置との間で変位するようにしているが、軸線方向で直線的に動かすことにより開閉弁エレメント（弁体）２８の同様の変位を生じさせるようにすることが出来る。   As mentioned above, although embodiment of the valve apparatus which concerns on this invention was described, this invention is not limited to these, A various deformation | transformation is possible. For example, the valve body 28 in the second embodiment may be plate-shaped like a so-called gate valve, and the opening 28-2 may be provided with an opening having substantially the same area as the fluid passage 24. The valve operating element 30 is rotated to displace the open / close valve element (valve element) 28 between the closed position and the open position. However, the open / close valve element 30 is moved linearly in the axial direction. The same displacement of the (valve element) 28 can be caused.

グラインダー（エア工具）１０；空気入口金具１２；エアモータ１４；弁装置１６；出力シャフト１８；円盤状研磨部材２０；回転伝達部２２；流体通路２４；長手軸線２４ｘ；流体通路エレメント２６；筒状部材２６ａ、２６ｂ；弁体２７；接続軸２７ａ；開閉作動エレメント２８；端部２８ｂ、２８ｃ；閉止部２８−１；開放部２８−２；頭部２８−３；弁操作エレメント３０；弁座３４；押し込みカム輪郭曲線部３６；戻しカム輪郭曲線部３８；円錐コイルバネ４０；コイルバネ４２；２ステップ凹部４４；軸線方向凹部４４ａ；周方向凹部４４ｂ；規制ピン４６
Grinder (air tool) 10; air inlet fitting 12; air motor 14; valve device 16; output shaft 18; disc-like polishing member 20; rotation transmission part 22; fluid passage 24; longitudinal axis 24x; Valve body 27; Connection shaft 27a; Opening / closing operation element 28; End portions 28b and 28c; Closing portion 28-1; Opening portion 28-2; Head portion 28-3; Valve operating element 30; Push cam contour curve portion 36; return cam contour curve portion 38; conical coil spring 40; coil spring 42; two-step recess 44; axial recess 44a; circumferential recess 44b;

Claims (8)

流体通路を有する流体通路エレメントと、
該流体通路エレメントに取り付けられ、該流体通路を閉止するための閉止位置と該閉止位置から該流体通路の横断方向で押し込まれて該流体通路を開放するための開放位置との間で変位可能とされた開閉作動エレメントと、
該流体通路エレメントの外周面上でＯＦＦ位置とＯＮ位置との間で変位可能とされ、該ＯＮ位置から該ＯＦＦ位置に変位されるときに該流体通路エレメントから外部に突出している該開閉作動エレメントの端部に摺動係合して該開閉作動エレメントを該開放位置から該閉止位置に戻すように構成された戻しカム輪郭曲線部を備える弁操作エレメントと
を有する弁装置。 A fluid passage element having a fluid passage;
Attached to the fluid passage element and displaceable between a closed position for closing the fluid passage and an open position for pushing the fluid passage transversely from the closed position to open the fluid passage. Open / close actuated element,
The opening / closing operation element that is displaceable between the OFF position and the ON position on the outer peripheral surface of the fluid passage element, and projects outward from the fluid passage element when the fluid passage element is displaced from the ON position to the OFF position. A valve operating element comprising a return cam contour curve portion configured to slide-engage with the end of the valve and return the opening / closing operation element from the open position to the closed position. 該開閉作動エレメントが該流体通路エレメントを該横断方向で貫通して延びるよう構成され、該戻しカム輪郭曲線部に摺動係合される該端部と、該端部の反対側の他端部とを有し、
該弁操作エレメントは、該ＯＦＦ位置から該ＯＮ位置に向かって変位されるときに、該開閉作動エレメントの該他端部に摺動係合して該開閉作動エレメントを該閉止位置から該開放位置に変位させるように構成された押し込みカム輪郭曲線部を備える請求項１に記載の弁装置。 The opening / closing actuating element extending through the fluid passage element in the transverse direction and slidingly engaged with the return cam profile curve, and the other end opposite to the end And
When the valve operating element is displaced from the OFF position toward the ON position, the valve operating element is slidably engaged with the other end of the opening / closing operation element to move the opening / closing operation element from the closed position to the open position. The valve device according to claim 1, further comprising a pushing cam contour curve portion configured to be displaced to a position. 該弁操作エレメントが該流体通路エレメントの長手軸線を中心にする周方向で該ＯＦＦ位置と該ＯＮ位置との間で変位可能とされている請求項２に記載の弁装置。   The valve device according to claim 2, wherein the valve operating element is displaceable between the OFF position and the ON position in a circumferential direction centering on a longitudinal axis of the fluid passage element. 該弁操作エレメントが該流体通路エレメントの長手軸線に平行な方向で該ＯＦＦ位置と該ＯＮ位置との間で変位可能とされている請求項２に記載の弁装置。   The valve device according to claim 2, wherein the valve operating element is displaceable between the OFF position and the ON position in a direction parallel to a longitudinal axis of the fluid passage element. 該開閉作動エレメントが該流体通路を開閉するための弁体とされ、該閉止位置にあるときは該流体通路を閉止し、該開放位置にあるときは該流体通路を開放するようにされている請求項１乃至４のいずれか一項に記載の弁装置。   The opening / closing operation element is a valve body for opening and closing the fluid passage, and the fluid passage is closed when in the closed position, and the fluid passage is opened when in the open position. The valve apparatus as described in any one of Claims 1 thru | or 4. 該開閉作動エレメントとしての該弁体が、該閉止位置にあるときに該流体通路を閉止するサイズとされた閉止部と、該開放位置にあるときに該流体通路の中央部分を該横断方向で伸長する開放部であって、流体が該開放部の両側を通って流れることを許容するサイズとされている開放部とを有する請求項５に記載の弁装置。   When the valve body as the opening / closing operation element is in the closed position, the closing portion is sized to close the fluid passage, and when in the open position, the central portion of the fluid passage is disposed in the transverse direction. 6. A valve device as claimed in claim 5, comprising an opening that extends, the opening being sized to allow fluid to flow through both sides of the opening. 該開閉作動エレメントが該流体通路を開閉するための弁体を作動させるための部材であり、該閉止位置にあるときは該弁体を流体通路閉止位置とし該開放位置にあるときは該弁体を流体通路開放位置とするようにされている請求項１ないし４のいずれか一項に記載の弁装置。   The opening / closing operation element is a member for operating a valve body for opening and closing the fluid passage, and when in the closed position, the valve body is a fluid passage closed position, and when in the open position, the valve body The valve device according to any one of claims 1 to 4, wherein a fluid passage opening position is set. 外部から圧縮空気を受け入れてエアモータに供給することにより該エアモータを駆動して作業を行うエア工具であって、請求項１乃至７のいずれか一項に記載の弁装置を備え、該弁装置における該流体通路エレメントの該流体通路を通して圧縮空気を該エアモータに供給するようにしたエア工具。   An air tool that performs an operation by driving the air motor by receiving compressed air from the outside and supplying it to the air motor, comprising the valve device according to any one of claims 1 to 7, An air tool configured to supply compressed air to the air motor through the fluid passage of the fluid passage element.
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CN105459034A (en) 2016-04-06
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