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JP7067538B2 - Vehicle cleaning system and its cleaning method - Google Patents
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JP7067538B2 - Vehicle cleaning system and its cleaning method - Google Patents

Vehicle cleaning system and its cleaning method Download PDF

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JP7067538B2
JP7067538B2 JP2019164816A JP2019164816A JP7067538B2 JP 7067538 B2 JP7067538 B2 JP 7067538B2 JP 2019164816 A JP2019164816 A JP 2019164816A JP 2019164816 A JP2019164816 A JP 2019164816A JP 7067538 B2 JP7067538 B2 JP 7067538B2
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valve
pressure
flow path
valve body
fluid
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JP2020083305A (en
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雄介 山内
尚太 足立
貴裕 青山
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Denso Corp
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Denso Corp
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Priority to US17/282,486 priority patent/US12162439B2/en
Priority to DE112019005827.4T priority patent/DE112019005827T5/en
Priority to PCT/JP2019/045496 priority patent/WO2020105686A1/en
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Description

本発明は、車両の清掃対象に流体を吹付けて異物を除去する車両用清掃システム及びその清掃方法に関する。 The present invention relates to a vehicle cleaning system for removing foreign substances by spraying a fluid onto a vehicle cleaning target and a cleaning method thereof.

近年、車両の高度運転支援や自動運転の技術が進みつつあり、車両の周囲状況を把握するためのセンサが増えつつある（例えば特許文献１参照）。その一つとして例えば、光学センサを用いる測距システムであるＬＩＤＡＲ（Light Detection and Ranging、又はLaser Imaging Detection and Ranging）が知られ、自車と対象物との間での投受光による距離測定が行われる。 In recent years, advanced driving support and automatic driving techniques for vehicles have been advancing, and the number of sensors for grasping the surrounding conditions of vehicles is increasing (see, for example, Patent Document 1). As one of them, for example, LIDAR (Light Detection and Ranging, or Laser Imaging Detection and Ranging), which is a distance measuring system using an optical sensor, is known, and distance measurement is performed between a vehicle and an object by projection and reception. Will be.

車両の周囲状況を把握するセンサは、そのセンシング面（例えばレンズやカバーガラス等の外表面）が車両の外側に露出する態様となっている。そのため、センサのセンシング面に雨滴等の異物が付着して、上記測距システム等においては、光学センサの光路上に異物が位置することで測距精度が低下する懸念があった。 The sensor for grasping the surrounding condition of the vehicle has a mode in which the sensing surface (for example, the outer surface of a lens, a cover glass, etc.) is exposed to the outside of the vehicle. Therefore, there is a concern that foreign matter such as raindrops adheres to the sensing surface of the sensor, and the foreign matter is located on the optical path of the optical sensor in the distance measuring system or the like, so that the distance measuring accuracy is lowered.

そこで、センサのセンシング面にエア（空気）や洗浄液、若しくはこれらを混合した気液混合流体を吹付けて（例えば特許文献２参照）、センシング面に付着した異物を除去清掃する技術の開発検討が行われている。 Therefore, the development of a technique for removing and cleaning foreign matter adhering to the sensing surface by spraying air (air), a cleaning liquid, or a gas-liquid mixed fluid in which these are mixed (see, for example, Patent Document 2) on the sensing surface of the sensor is being studied. It is done.

特開２０１８－３７１００号公報Japanese Unexamined Patent Publication No. 2018-37100 特開２０１６－２２２０７４号公報Japanese Unexamined Patent Publication No. 2016-22274

ところで、センサのセンシング面に付着した異物をより確実に除去清掃するには、センシング面に流体を吹付けるための駆動ポンプとして大型のものを用い、センシング面に対して流体を強く吹付けるようにすれば済むが、車両用となると、搭載スペースや駆動電力等についても十分に考慮する必要がある。そのため、開発者としては、駆動ポンプに小型のものを用いた場合であっても、異物の除去等の清掃力を維持若しくはより向上させることが検討課題としてあった。 By the way, in order to more reliably remove and clean the foreign matter adhering to the sensing surface of the sensor, use a large drive pump for blowing the fluid on the sensing surface, and blow the fluid strongly on the sensing surface. However, when it comes to vehicles, it is necessary to fully consider the mounting space and driving power. Therefore, as a developer, it has been an issue to consider maintaining or further improving the cleaning power such as removal of foreign matter even when a small drive pump is used.

本発明は、上記課題を解決するためになされたものであって、その目的は、車両の清掃対象に付着した異物の除去等の清掃力をより向上させ得る車両用清掃システム及びその清掃方法を提供することにある。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle cleaning system and a cleaning method thereof that can further improve cleaning power such as removal of foreign matter adhering to a vehicle cleaning target. To provide.

上記課題を解決する車両用清掃システムは、駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）であって、前記駆動ポンプと前記噴射ノズルとの間に弁装置（２４，２４ａ）を設け、前記弁装置は、前記駆動ポンプ側である前記流体の導入流路（３８）を弁体（３３ａ）により閉弁し、前記駆動ポンプから供給される前記流体を前記駆動ポンプの吐出圧力（Ｐ０）よりも高い圧力まで蓄圧する弁部（３０ａ）と、前記蓄圧時に前記導入流路側から前記流体の漏れ（ＣＡｘ）を生じさせその漏れによる漏れ側での蓄圧と、前記導入流路側及び前記漏れ側にて蓄圧した両圧力（Ｐ１，Ｐ２）に基づく前記弁体の開弁と、前記弁体の開弁に基づき前記導入流路側にて蓄圧した前記流体の前記噴射ノズル側である吐出流路（３９）への出力と、前記吐出流路への前記流体の出力に基づき前記導入流路側にて蓄圧可能に前記弁体の閉弁復帰とを行うように構成された補助機構（３０ａ，３０ｂ，３３，３６）とを備えた。 The vehicle cleaning system that solves the above problems injects the fluid (CA1) based on the supply from the drive pump (23) from the injection nozzle (25) to the vehicle (10) to be cleaned (11, 12, 15, 16, 17). A vehicle cleaning system (20) that removes and cleans foreign matter adhering to the cleaning target by spraying the fluid on the surface of the vehicle, wherein a valve device (24, 24a) is provided between the drive pump and the injection nozzle. In the valve device, the introduction flow path (38) of the fluid on the drive pump side is closed by the valve body (33a), and the fluid supplied from the drive pump is discharged from the discharge pressure (P0) of the drive pump. The valve portion (30a) that accumulates pressure up to a high pressure, the fluid leaks (CAx) from the introduction flow path side at the time of the accumulation, and the pressure accumulation on the leakage side due to the leakage, and the introduction flow path side and the leakage side. The valve opening of the valve body based on both pressures (P1, P2) accumulated in the pressure, and the discharge flow path (39) which is the injection nozzle side of the fluid accumulated in the introduction flow path side based on the valve opening of the valve body. ) And the auxiliary mechanism (30a, 30b, 33) configured to perform the valve closing return of the valve body so that the pressure can be accumulated on the introduction flow path side based on the output of the fluid to the discharge flow path. , 36) and.

上記車両用清掃システムによれば、弁装置は、導入流路を弁体にて閉弁する弁部を備え、駆動ポンプから供給される流体を駆動ポンプの吐出圧力よりも高い圧力まで蓄圧する。補助機構は、蓄圧時に導入流路側から流体の漏れを生じさせて漏れ側にて蓄圧する。次いで、導入流路側及び漏れ側にて蓄圧した両圧力に基づいて弁体を開弁させて、導入流路側にて蓄圧した流体を吐出流路に出力する。そして、その後再び導入流路側にて蓄圧可能に弁体を閉弁復帰させる。これにより、駆動ポンプからの連続した流体の吐出で駆動ポンプの吐出圧力よりも圧力を高めた流体が繰り返して噴射ノズルから清掃対象に吹付けられるため、駆動ポンプの大型化を図らなくとも、清掃対象に付着した異物の除去等の清掃力を維持若しくはより向上させることが可能である。 According to the vehicle cleaning system, the valve device includes a valve portion that closes the introduction flow path with a valve body, and stores the fluid supplied from the drive pump to a pressure higher than the discharge pressure of the drive pump. The auxiliary mechanism causes fluid to leak from the introduction flow path side at the time of accumulating pressure, and accumulates pressure on the leaking side. Next, the valve body is opened based on both the pressures accumulated on the introduction flow path side and the leakage side, and the fluid accumulated on the introduction flow path side is output to the discharge flow path. Then, after that, the valve body is closed and returned so that the pressure can be accumulated again on the introduction flow path side. As a result, the fluid whose pressure is higher than the discharge pressure of the drive pump is repeatedly sprayed from the injection nozzle to the object to be cleaned by the continuous discharge of the fluid from the drive pump. It is possible to maintain or further improve the cleaning power such as removal of foreign matter adhering to the target.

なお、上記で用いた「駆動ポンプの吐出圧力」とは、駆動ポンプと噴射ノズルとを接続ホースで直接接続して駆動ポンプを駆動した場合の接続ホース内の圧力であり、以下においても同様である。 The "discharge pressure of the drive pump" used above is the pressure in the connection hose when the drive pump and the injection nozzle are directly connected by the connection hose to drive the drive pump, and the same applies to the following. be.

また、上記課題を解決する車両用清掃システムは、駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７，１８）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）であって、前記駆動ポンプと前記噴射ノズルとの間に弁装置（２４，２４ａ）を設け、前記弁装置は、前記駆動ポンプ側である前記流体の導入流路（３８）を開閉する弁体（３３ａ）を含むダイヤフラム（３３）と、前記導入流路の閉弁方向に前記弁体を付勢する付勢部材（３４）とを有し、前記ダイヤフラムは、前記導入流路の閉弁状態において前記駆動ポンプから供給される前記流体で加圧される前記弁体における第１の面積（Ｓ１）の第１加圧部分（３３ａ１）と、前記導入流路の閉弁状態において前記導入流路側からの前記流体の漏れ（ＣＡｘ）によりその漏れ側で加圧される前記弁体の周囲における第２の面積（Ｓ２）の第２加圧部分（３３ｃ１）とを有し、前記第１及び第２加圧部分への加圧に基づき前記付勢部材の付勢力に抗して開弁されるとともに該開弁による前記噴射ノズル側である吐出流路（３９）への前記流体の出力に基づき閉弁復帰するように構成された。 Further, in the vehicle cleaning system that solves the above problems, the fluid (CA1) based on the supply from the drive pump (23) is injected from the injection nozzle (25) to the vehicle (10) to be cleaned (11, 12, 15, 16, A vehicle cleaning system (20) that sprays on 17, 18) to remove and clean foreign matter adhering to the cleaning target, and is a valve device (24, 24a) between the drive pump and the injection nozzle. The valve device includes a diaphragm (33) including a valve body (33a) that opens and closes the fluid introduction flow path (38) on the drive pump side, and the valve in the valve closing direction of the introduction flow path. The diaphragm has a urging member (34) that urges the body, and the diaphragm is the first in the valve body that is pressurized by the fluid supplied from the drive pump in the valve closed state of the introduction flow path. The first pressurized portion (33a1) of the area (S1) and the valve body that is pressurized on the leak side due to the fluid leakage (CAx) from the introduction flow path side in the valve closed state of the introduction flow path. It has a second pressurized portion (33c1) of a second area (S2) in the periphery, and is opened against the urging force of the urging member based on the pressurization to the first and second pressurized portions. It was configured to be valved and to return to the closed valve based on the output of the fluid to the discharge flow path (39) on the injection nozzle side by the valve opening.

上記車両用清掃システムによれば、弁装置は、導入流路を開閉する弁体を含むダイヤフラムと弁体を閉弁方向に付勢する付勢部材とを有しており、弁体による導入流路の閉弁状態において駆動ポンプから流体が供給されることで弁体における第１の面積の第１加圧部分が加圧される。駆動ポンプから流体が更に供給されて導入流路の圧力が高まると、弁体が閉弁状態であるものの導入流路側から流体の漏れを生じさせ、その漏れ側でも圧力が高まり弁体の周囲部位である第２の面積の第２加圧部分が加圧される。そのため、弁体を含むダイヤフラムは、流体により第１加圧部分に加えて第２加圧部分も加圧される。これにより、駆動ポンプから導入流路に供給される流体にて第１の面積の第１加圧部分だけへの加圧では付勢部材の付勢力に抗して開弁できない弁体を、第１加圧部分への加圧に加えて第２の面積の第２加圧部分に対しても加圧して付勢部材の付勢力に抗した加圧力を弁体を含むダイヤフラムに作用させることで開弁状態となる。この第２加圧部分を加圧して開弁状態に至るまでの間に導入流路側において駆動ポンプの吐出圧力よりも高い圧力まで蓄圧されるので、この蓄圧した流体が弁体の開弁により瞬間的に吐出流路に出力される。そして、吐出流路への流体の出力に基づき、その後再び弁体が閉弁復帰となる。これにより、駆動ポンプからの連続した流体の吐出で駆動ポンプの吐出圧力よりも圧力を高めた流体が繰り返して噴射ノズルから清掃対象に吹付けられるため、駆動ポンプの大型化を図らなくとも、清掃対象に付着した異物の除去等の清掃力を維持若しくはより向上させることが可能である。 According to the vehicle cleaning system, the valve device has a diaphragm including a valve body that opens and closes the introduction flow path and an urging member that urges the valve body in the valve closing direction, and the introduction flow by the valve body. When the valve is closed, the fluid is supplied from the drive pump to pressurize the first pressurized portion of the first area of the valve body. When more fluid is supplied from the drive pump and the pressure in the introduction flow path increases, the valve body is closed, but fluid leaks from the introduction flow path side, and the pressure also increases on the leak side and the peripheral part of the valve body. The second pressurized portion of the second area is pressurized. Therefore, in the diaphragm including the valve body, the second pressurized portion is pressurized in addition to the first pressurized portion by the fluid. As a result, a valve body that cannot be opened against the urging force of the urging member by pressurizing only the first pressurized portion of the first area with the fluid supplied from the drive pump to the introduction flow path is provided. (1) In addition to pressurizing the pressurized portion, the second pressurized portion of the second area is also pressurized to exert a pressing force against the urging force of the urging member on the diaphragm including the valve body. The valve is opened. Since the pressure is accumulated to a pressure higher than the discharge pressure of the drive pump on the introduction flow path side until the valve opening state is reached by pressurizing the second pressurized portion, the accumulated fluid is instantaneously stored by the valve opening of the valve body. Is output to the discharge flow path. Then, based on the output of the fluid to the discharge flow path, the valve body is then closed again. As a result, the fluid whose pressure is higher than the discharge pressure of the drive pump is repeatedly sprayed from the injection nozzle to the object to be cleaned by the continuous discharge of the fluid from the drive pump. It is possible to maintain or further improve the cleaning power such as removal of foreign matter adhering to the target.

また、上記課題を解決する車両用清掃システムの清掃方法は、駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）の清掃方法であって、前記駆動ポンプと前記噴射ノズルとの間に設けた弁装置（２４，２４ａ）は、前記駆動ポンプ側である前記流体の導入流路（３８）を弁体（３３ａ）により閉弁し、前記駆動ポンプから供給される前記流体を前記駆動ポンプの吐出圧力（Ｐ０）よりも高い圧力まで蓄圧するとともに、前記蓄圧時に前記導入流路側から前記流体の漏れ（ＣＡｘ）を生じさせて漏れ側にて蓄圧し、前記導入流路側及び前記漏れ側にて蓄圧した両圧力（Ｐ１，Ｐ２）に基づいて前記弁体を開弁させ、前記弁体の開弁に基づき前記導入流路側にて蓄圧した前記流体を前記噴射ノズル側である吐出流路（３９）に出力し、前記流体の前記吐出流路への出力に基づき前記導入流路側にて蓄圧可能に前記弁体を閉弁復帰させる。 Further, in the cleaning method of the vehicle cleaning system that solves the above problems, the fluid (CA1) based on the supply from the drive pump (23) is injected from the injection nozzle (25) to the vehicle (10) to be cleaned (11, 12, 15). , 16, 17) is a cleaning method for a vehicle cleaning system (20) that removes and cleans foreign matter adhering to the cleaning target, and is a valve provided between the drive pump and the injection nozzle. The apparatus (24, 24a) closes the fluid introduction flow path (38) on the drive pump side by the valve body (33a), and the fluid supplied from the drive pump is discharged from the drive pump. The pressure was accumulated to a pressure higher than (P0), and the fluid leaked (CAx) was generated from the introduction flow path side at the time of the accumulation, and the pressure was accumulated on the leakage side, and the pressure was accumulated on the introduction flow path side and the leakage side. The valve body is opened based on both pressures (P1 and P2), and the fluid accumulated in the introduction flow path side based on the valve opening of the valve body is transferred to the discharge flow path (39) on the injection nozzle side. The valve body is closed and returned so that pressure can be accumulated on the introduction flow path side based on the output of the fluid to the discharge flow path.

上記清掃方法によれば、上記車両用清掃システムと同様、駆動ポンプからの連続した流体の吐出で駆動ポンプの吐出圧力よりも圧力を高めた流体が繰り返して噴射ノズルから清掃対象に吹付けられるため、駆動ポンプの大型化を図らなくとも、清掃対象に付着した異物の除去等の清掃力を維持若しくはより向上させることが可能である。 According to the cleaning method, as in the vehicle cleaning system, the fluid whose pressure is higher than the discharge pressure of the drive pump is repeatedly sprayed from the injection nozzle to the cleaning target by the continuous discharge of the fluid from the drive pump. It is possible to maintain or further improve the cleaning power such as removal of foreign matter adhering to the object to be cleaned without increasing the size of the drive pump.

各実施形態における車両用清掃システムの概略構成図。Schematic block diagram of the vehicle cleaning system in each embodiment. 第１実施形態における清掃装置の概略構成図。The schematic block diagram of the cleaning apparatus in 1st Embodiment. 第１実施形態における弁装置の概略構成図。The schematic block diagram of the valve device in 1st Embodiment. 第１実施形態における清掃装置の動作説明に用いる概略構成図。The schematic block diagram used for the operation explanation of the cleaning apparatus in 1st Embodiment. 第１実施形態における清掃装置の動作説明に用いる概略構成図。The schematic block diagram used for the operation explanation of the cleaning apparatus in 1st Embodiment. 第１実施形態における清掃装置の動作説明に用いる波形図。The waveform diagram used for the operation explanation of the cleaning apparatus in 1st Embodiment. 第２実施形態における清掃装置の概略構成図。The schematic block diagram of the cleaning apparatus in 2nd Embodiment. 第２実施形態における弁装置の概略構成図。The schematic block diagram of the valve device in 2nd Embodiment. 第２実施形態における清掃装置の動作説明に用いる概略構成図。The schematic block diagram used for the operation explanation of the cleaning apparatus in 2nd Embodiment. 第２実施形態における清掃装置の動作説明に用いる概略構成図。The schematic block diagram used for the operation explanation of the cleaning apparatus in 2nd Embodiment. 実施形態における弁装置の動作説明に用いる動作遷移図。The operation transition diagram used for the operation explanation of the valve device in an embodiment. 実施形態における弁装置の動作説明に用いる波形図。The waveform diagram used for the operation explanation of the valve device in an embodiment.

（第１実施形態）
以下、車両用清掃システム及びその清掃方法の第１実施形態について説明する。
図１に示す車両１０には、前端中央部に第１測距センサ１１が設置され、後端中央部に第２測距センサ１２が設置されている。第１及び第２測距センサ１１，１２は、車両１０のそれぞれ前方及び後方に向けた所定波長の光の投受光を行う光学センサを用いて構成されるものである。第１及び第２測距センサ１１，１２は、それぞれ自車と前方対象物及び後方対象物との距離を測定する測距システム（ＬＩＤＡＲ等）に用いられ、車両１０の高度運転支援や自動運転等を実施するシステムに用いられる。 (First Embodiment)
Hereinafter, the first embodiment of the vehicle cleaning system and the cleaning method thereof will be described.
In the vehicle 10 shown in FIG. 1, a first distance measuring sensor 11 is installed at the center of the front end, and a second distance measuring sensor 12 is installed at the center of the rear end. The first and second ranging sensors 11 and 12 are configured by using optical sensors that emit and receive light having a predetermined wavelength toward the front and rear of the vehicle 10, respectively. The first and second distance measuring sensors 11 and 12 are used in a distance measuring system (LIDAR, etc.) that measures the distance between the own vehicle and the front object and the rear object, respectively, and are used for advanced driving support and automatic driving of the vehicle 10. It is used in the system to carry out such things.

第１及び第２測距センサ１１，１２は、それぞれ自身のセンシング面（例えばレンズやカバーガラス等の外表面）１１ａ，１２ａが車両１０の外側に露出する態様となっている。すなわち、測距精度の低下懸念のある雨滴等の異物が各センシング面１１ａ，１２ａに付着し得るため、車両１０には各センシング面１１ａ，１２ａに付着した異物の除去清掃を行う車両用清掃システム２０が搭載されている。 The first and second ranging sensors 11 and 12 have a mode in which their own sensing surfaces (for example, outer surfaces such as a lens and a cover glass) 11a and 12a are exposed to the outside of the vehicle 10. That is, foreign matter such as raindrops, which may reduce the distance measurement accuracy, may adhere to the sensing surfaces 11a and 12a. Therefore, the vehicle 10 is a vehicle cleaning system that removes and cleans the foreign matter adhering to the sensing surfaces 11a and 12a. 20 is installed.

車両用清掃システム２０は、第１及び第２清掃装置２１，２２を備える。第１清掃装置２１は、車両１０の前端中央部に設置の第１測距センサ１１を清掃対象とし、第２清掃装置２２は、車両１０の後端中央部に設置の第２測距センサ１２を清掃対象としている。 The vehicle cleaning system 20 includes first and second cleaning devices 21 and 22. The first cleaning device 21 targets the first distance measuring sensor 11 installed in the central portion of the front end of the vehicle 10, and the second cleaning device 22 is the second ranging sensor 12 installed in the central portion of the rear end of the vehicle 10. Is targeted for cleaning.

図２に示すように、第１及び第２清掃装置２１，２２は、それぞれ駆動ポンプ２３、弁装置２４及び噴射ノズル２５を備え、同一構成となっている。なお、第１及び第２清掃装置２１，２２は同一構成であるため、図２を用いた共通の説明とする。 As shown in FIG. 2, the first and second cleaning devices 21 and 22, respectively, include a drive pump 23, a valve device 24, and an injection nozzle 25, and have the same configuration. Since the first and second cleaning devices 21 and 22 have the same configuration, the same description will be given with reference to FIG.

第１及び第２清掃装置２１，２２において、駆動ポンプ２３と弁装置２４とは接続ホース２６にて互いに接続され、弁装置２４と噴射ノズル２５とは接続ホース２７にて互いに接続される。接続ホース２６，２７は、ゴムホース等、可撓性材料にて構成される。駆動ポンプ２３は、流体としてのエアＣＡ１を生成可能な電動のエアポンプにて構成される。弁装置２４は、駆動ポンプ２３から連続して供給されるエアＣＡ１を更に高圧かつパルス状（断続状）に変換し、この高圧でパルス状とした、すなわち断続的に高圧に高められた出力エアＣＡ２を噴射ノズル２５に供給する。噴射ノズル２５は、自身の噴射口２５ａがそれぞれ図１に示す第１及び第２測距センサ１１，１２のセンシング面１１ａ，１２ａに向けられて配置されており、弁装置２４から供給される高圧でパルス状の出力エアＣＡ２をそれぞれのセンシング面１１ａ，１２ａの好適範囲に向けて吹付ける。 In the first and second cleaning devices 21 and 22, the drive pump 23 and the valve device 24 are connected to each other by a connecting hose 26, and the valve device 24 and the injection nozzle 25 are connected to each other by a connecting hose 27. The connecting hoses 26 and 27 are made of a flexible material such as a rubber hose. The drive pump 23 is composed of an electric air pump capable of generating air CA1 as a fluid. The valve device 24 converts the air CA1 continuously supplied from the drive pump 23 into a high pressure and pulse shape (intermittent shape), and pulses the air CA1 at this high pressure, that is, the output air intermittently increased to a high pressure. CA2 is supplied to the injection nozzle 25. The injection nozzle 25 has its own injection port 25a arranged toward the sensing surfaces 11a and 12a of the first and second ranging sensors 11 and 12, respectively shown in FIG. 1, and has a high pressure supplied from the valve device 24. The pulsed output air CA2 is blown toward a suitable range of the respective sensing surfaces 11a and 12a.

なお、弁装置２４は、弁装置２４で生成された出力エアＣＡ２の噴射ノズル２５までの配管ロスを極力少なくするためにも噴射ノズル２５の近傍位置に配置するのが好ましい。また、弁装置２４と噴射ノズル２５とを接続する図２に示す接続ホース２７を省略し、弁装置２４と噴射ノズル２５とを一体的に構成してもよい。駆動ポンプ２３については、弁装置２４の近傍位置に配置していても離間位置に配置していてもよい。また、第１及び第２清掃装置２１，２２で共通の１つの駆動ポンプとしてもよい。共通とした場合、第１及び第２清掃装置２１，２２毎にそれぞれ蓄圧部を設け、共通の駆動ポンプから供給されるエアをそれぞれ各蓄圧部にて蓄圧し、各蓄圧部から各清掃装置２１，２２がエアの供給を受けるようにしてもよい。 The valve device 24 is preferably arranged in the vicinity of the injection nozzle 25 in order to minimize the piping loss to the injection nozzle 25 of the output air CA2 generated by the valve device 24. Further, the connection hose 27 shown in FIG. 2 that connects the valve device 24 and the injection nozzle 25 may be omitted, and the valve device 24 and the injection nozzle 25 may be integrally configured. The drive pump 23 may be arranged at a position near the valve device 24 or at a separated position. Further, it may be used as one drive pump common to the first and second cleaning devices 21 and 22. When common, a pressure accumulator is provided for each of the first and second cleaning devices 21 and 22, and the air supplied from the common drive pump is accumulated in each accumulator, and each cleaning device 21 is stored from each accumulator. , 22 may be supplied with air.

図２及び図３に示すように、弁装置２４は、ベース部材３１、カバー部材３２、ダイヤフラム３３及び付勢バネ３４，３５を備える。これら構成部品のうち、ベース部材３１の一部、カバー部材３２、ダイヤフラム３３及び付勢バネ３４，３５にて弁本体部３０が構成される。本実施形態の弁装置２４は、換言すれば、列挙したベース部材３１、カバー部材３２、ダイヤフラム３３及び付勢バネ３４，３５のみの構成部品にて簡素に構成されたものである。なお、以降の説明では、ベース部材３１が下側、カバー部材３２が上側とするが、弁装置２４の使用時の向きはこれに限定されない。 As shown in FIGS. 2 and 3, the valve device 24 includes a base member 31, a cover member 32, a diaphragm 33, and urging springs 34, 35. Among these components, a part of the base member 31, the cover member 32, the diaphragm 33, and the urging springs 34 and 35 constitute the valve main body portion 30. In other words, the valve device 24 of the present embodiment is simply composed of only the listed base member 31, cover member 32, diaphragm 33, and urging springs 34, 35. In the following description, the base member 31 is on the lower side and the cover member 32 is on the upper side, but the orientation of the valve device 24 when used is not limited to this.

ベース部材３１は、樹脂製であり、上側部分に基台部３１ａ、下側部分に接続部３１ｂを有する。基台部３１ａは、弁本体部３０の筐体の下側部分を構成するものであり、円形状の底壁部３１ｃと、底壁部３１ｃの周縁部分から上方に立設される円環状の側壁部３１ｄとを有する。これに対し、カバー部材３２は、弁本体部３０の筐体の上側部分を構成するものであり、円形状の上壁部３２ａと、上壁部３２ａの周縁部分から下方に延出される円環状の側壁部３２ｂとを有する。ベース部材３１とカバー部材３２とは、側壁部３１ｄの上端面と側壁部３２ｂの下端面とが互いに当接するようにして組付けられ、各端面間でダイヤフラム３３の周縁部３３ｘを挟持し、この周縁部３３ｘの挟持によりシールが図られている。ダイヤフラム３３は、自身と基台部３１ａの底壁部３１ｃと側壁部３１ｄとで形成される空間を弁室３６とし、カバー部材３２の上壁部３２ａと側壁部３２ｂとで形成される空間を背圧室３７として区画する。 The base member 31 is made of resin and has a base portion 31a in an upper portion and a connecting portion 31b in a lower portion. The base portion 31a constitutes a lower portion of the housing of the valve main body portion 30, and has a circular bottom wall portion 31c and an annular shape standing upward from the peripheral portion of the bottom wall portion 31c. It has a side wall portion 31d. On the other hand, the cover member 32 constitutes the upper portion of the housing of the valve main body portion 30, and is an annular shape extending downward from the peripheral portion of the circular upper wall portion 32a and the upper wall portion 32a. It has a side wall portion 32b of the above. The base member 31 and the cover member 32 are assembled so that the upper end surface of the side wall portion 31d and the lower end surface of the side wall portion 32b are in contact with each other, and the peripheral edge portion 33x of the diaphragm 33 is sandwiched between the end faces. The seal is achieved by sandwiching the peripheral edge portion 33x. The diaphragm 33 has a valve chamber 36 as a space formed by itself, a bottom wall portion 31c of the base portion 31a, and a side wall portion 31d, and a space formed by the upper wall portion 32a and the side wall portion 32b of the cover member 32. It is partitioned as a back pressure chamber 37.

接続部３１ｂは、基台部３１ａの下面側に設けられ、基台部３１ａの底壁部３１ｃから一旦下方に延びそこから二股に延びる逆Ｔ字状をなしている。接続部３１ｂは、二股に分かれた一方側を駆動ポンプ２３側の接続ホース２６と接続するためのポンプ側接続部３１ｅ、二股に分かれた他方側を噴射ノズル２５側の接続ホース２７と接続するためのノズル側接続部３１ｆとしている。ポンプ側接続部３１ｅの内側に形成される導入流路３８と、ノズル側接続部３１ｆの内側に形成される吐出流路３９とはそれぞれ独立しており、基台部３１ａの底壁部３１ｃの略中央部において導入流路３８及び吐出流路３９の各開口部３８ａ，３９ａがそれぞれ形成される。各開口部３８ａ，３９ａは、底壁部３１ｃの底面上から若干円筒状に突出する形状をなす。 The connecting portion 31b is provided on the lower surface side of the base portion 31a, and has an inverted T shape that extends downward from the bottom wall portion 31c of the base portion 31a and then extends bifurcated from the bottom wall portion 31c. The connecting portion 31b is for connecting the pump side connecting portion 31e for connecting one bifurcated side to the connecting hose 26 on the drive pump 23 side and the connecting portion 31b for connecting the other bifurcated side to the connecting hose 27 on the injection nozzle 25 side. The nozzle side connection portion 31f of the above is used. The introduction flow path 38 formed inside the pump side connection portion 31e and the discharge flow path 39 formed inside the nozzle side connection portion 31f are independent of each other, and the bottom wall portion 31c of the base portion 31a The openings 38a and 39a of the introduction flow path 38 and the discharge flow path 39 are formed in the substantially central portion, respectively. Each of the openings 38a and 39a has a shape that slightly protrudes from the bottom surface of the bottom wall portion 31c in a cylindrical shape.

ダイヤフラム３３は、可撓性材料にて略円板状に形成され、略中央部において、導入流路３８及び吐出流路３９の各開口部３８ａ，３９ａと対向する位置のそれぞれに略円柱状の弁体３３ａ，３３ｂを有する。ダイヤフラム３３は、各弁体３３ａ，３３ｂと周縁部３３ｘとがともに厚みを有する一方で、それ以外の部位、すなわち弁体３３ａと弁体３３ｂとの間や各弁体３３ａ，３３ｂと周縁部３３ｘとの間が各弁体３３ａ，３３ｂ及び周縁部３３ｘよりも薄い薄肉部３３ｃとして構成される。つまり、ダイヤフラム３３は、固定される周縁部３３ｘに対し薄肉部３３ｃを介して繋がる各弁体３３ａ，３３ｂが変位可能に、しかも各弁体３３ａ，３３ｂ同士もそれぞれ独立して変位可能に構成される。このような各弁体３３ａ，３３ｂの変位動作により、弁体３３ａは導入流路３８の開口部３８ａと当接又は離間して駆動ポンプ２３側と弁室３６との間の流路の開閉を行い、弁体３３ｂは吐出流路３９の開口部３９ａと当接又は離間して噴射ノズル２５側と弁室３６との間の流路の開閉を行う。 The diaphragm 33 is formed of a flexible material in a substantially disk shape, and has a substantially columnar shape at positions facing the openings 38a and 39a of the introduction flow path 38 and the discharge flow path 39 in the substantially central portion. It has valves 33a and 33b. In the diaphragm 33, while each valve body 33a, 33b and the peripheral portion 33x both have a thickness, other parts, that is, between the valve body 33a and the valve body 33b, and each valve body 33a, 33b and the peripheral portion 33x. The space between the valve body 33a and 33b is formed as a thin portion 33c thinner than the peripheral portion 33x. That is, the diaphragm 33 is configured such that the valve bodies 33a and 33b connected to the fixed peripheral edge portion 33x via the thin wall portion 33c can be displaced, and the valve bodies 33a and 33b can also be displaced independently of each other. Displacement. Due to the displacement operation of each of the valve bodies 33a and 33b, the valve body 33a abuts or separates from the opening 38a of the introduction flow path 38 to open and close the flow path between the drive pump 23 side and the valve chamber 36. The valve body 33b abuts or separates from the opening 39a of the discharge flow path 39 to open and close the flow path between the injection nozzle 25 side and the valve chamber 36.

カバー部材３２は、樹脂製であり、上壁部３２ａにおける各弁体３３ａ，３３ｂと対向する位置のそれぞれに突状部３２ｃ，３２ｄを有する。各突状部３２ｃ，３２ｄは、圧縮コイルバネよりなる付勢バネ３４，３５の位置規制用の突部であり、各突状部３２ｃ，３２ｄにそれぞれ付勢バネ３４，３５の上部側が挿入される。各付勢バネ３４，３５の上端部は上壁部３２ａに当接する。これに対し、各付勢バネ３４，３５の下端部は各弁体３３ａ，３３ｂに当接する。つまり、各付勢バネ３４，３５は、上壁部３２ａを起点として各弁体３３ａ，３３ｂを下方に付勢、すなわち各弁体３３ａ，３３ｂを導入流路３８及び吐出流路３９の各開口部３８ａ，３９ａ側に向けて付勢する。なお、付勢バネ３５の付勢力は、付勢バネ３４の付勢力よりも相対的に小さい設定である。 The cover member 32 is made of resin and has projecting portions 32c and 32d at positions facing the valve bodies 33a and 33b on the upper wall portion 32a, respectively. The protruding portions 32c and 32d are protrusions for restricting the positions of the urging springs 34 and 35 made of compression coil springs, and the upper side of the urging springs 34 and 35 is inserted into the protruding portions 32c and 32d, respectively. .. The upper end portions of the urging springs 34 and 35 abut on the upper wall portion 32a. On the other hand, the lower ends of the urging springs 34 and 35 abut on the valve bodies 33a and 33b. That is, each of the urging springs 34 and 35 urges the valve bodies 33a and 33b downward from the upper wall portion 32a, that is, the valve bodies 33a and 33b are opened in the introduction flow path 38 and the discharge flow path 39. Bounce toward the portions 38a and 39a. The urging force of the urging spring 35 is set to be relatively smaller than the urging force of the urging spring 34.

ここで、各弁体３３ａ，３３ｂの上面においても突部３３ｄ，３３ｅが設けられ、各付勢バネ３４，３５の下部側が各突部３３ｄ，３３ｅに挿入されている。すなわち、各付勢バネ３４，３５と各弁体３３ａ，３３ｂとの相対的な位置規制を行って相互間の位置ずれを抑え、特に本実施形態のようにダイヤフラム３３の中心から偏倚した位置に設けられる各弁体３３ａ，３３ｂに対し、常に適切な付勢力を各付勢バネ３４，３５から付与するのに好適である。なお、各突部３３ｄ，３３ｅや各突状部３２ｃ，３２ｄを特に設けなくてもよい。 Here, protrusions 33d and 33e are also provided on the upper surfaces of the valve bodies 33a and 33b, and the lower side of the urging springs 34 and 35 is inserted into the protrusions 33d and 33e. That is, the relative positions of the urging springs 34 and 35 and the valve bodies 33a and 33b are restricted to suppress the positional deviation between them, and in particular, the position is deviated from the center of the diaphragm 33 as in the present embodiment. It is suitable to always apply an appropriate urging force to each of the provided valve bodies 33a and 33b from the urging springs 34 and 35. It is not necessary to provide the projecting portions 33d and 33e and the projecting portions 32c and 32d in particular.

カバー部材３２の上壁部３２ａには、各突状部３２ｃ，３２ｄよりも外側位置において、各弁体３３ａ，３３ｂの変位動作が背圧室３７内の圧力の影響を受けないように背圧室３７とカバー部材３２の外部と連通する（大気開放された）例えば２つの連通孔３２ｅが設けられている。ダイヤフラム３３の弁体３３ａ，３３ｂの速やかな動作が損なわれないようになっている。 The upper wall portion 32a of the cover member 32 has a back pressure so that the displacement operation of the valve bodies 33a and 33b is not affected by the pressure in the back pressure chamber 37 at a position outside the protruding portions 32c and 32d. For example, two communication holes 32e that communicate with the outside of the chamber 37 and the cover member 32 (open to the atmosphere) are provided. The rapid operation of the valve bodies 33a and 33b of the diaphragm 33 is not impaired.

このようにして第１及び第２清掃装置２１，２２の各弁装置２４が構成される。さらに、この弁装置２４の弁本体部３０は、導入流路３８側であり弁体３３ａ側を第１弁部３０ａとし、吐出流路３９側であり弁体３３ｂ側を第２弁部３０ｂとして構成される。弁装置２４の詳細動作については後述する。 In this way, the valve devices 24 of the first and second cleaning devices 21 and 22 are configured. Further, the valve main body portion 30 of the valve device 24 is the introduction flow path 38 side and the valve body 33a side is the first valve portion 30a, and the discharge flow path 39 side and the valve body 33b side is the second valve portion 30b. It is composed. The detailed operation of the valve device 24 will be described later.

図１に示すように、第１及び第２清掃装置２１，２２の各駆動ポンプ２３は、車両１０に搭載の各種ＥＣＵ（Electronic Control Unit）、すなわち上位ＥＣＵ５０、前側ＥＣＵ５１及び後側ＥＣＵ５２により制御される。前側ＥＣＵ５１は、第１清掃装置２１の駆動ポンプ２３を制御する機能を含み、後側ＥＣＵ５２は、第２清掃装置２２の駆動ポンプ２３を制御する機能を含む。上位ＥＣＵ５０は、前側ＥＣＵ５１及び後側ＥＣＵ５２の統括制御を行う。 As shown in FIG. 1, each drive pump 23 of the first and second cleaning devices 21 and 22 is controlled by various ECUs (Electronic Control Units) mounted on the vehicle 10, that is, the upper ECU 50, the front ECU 51 and the rear ECU 52. To. The front side ECU 51 includes a function of controlling the drive pump 23 of the first cleaning device 21, and the rear side ECU 52 includes a function of controlling the drive pump 23 of the second cleaning device 22. The upper ECU 50 performs integrated control of the front side ECU 51 and the rear side ECU 52.

本実施形態の動作及び作用について説明する。
上位ＥＣＵ５０において、第１及び第２測距センサ１１，１２の各センシング面１１ａ，１２ａに対する雨滴等の異物の付着に基づき、若しくは異物の有無にかかわらず所定時間毎に、対応する第１及び第２清掃装置２１，２２に清掃指令が生じると、前側及び後側ＥＣＵ５１，５２を通じて各清掃装置２１，２２の駆動ポンプ２３が駆動される。 The operation and operation of this embodiment will be described.
In the upper ECU 50, the corresponding first and first ones are based on the adhesion of foreign matter such as raindrops to the sensing surfaces 11a and 12a of the first and second ranging sensors 11 and 12, or at predetermined time intervals regardless of the presence or absence of foreign matter. 2 When a cleaning command is issued to the cleaning devices 21 and 22, the drive pumps 23 of the cleaning devices 21 and 22 are driven through the front and rear ECUs 51 and 52.

各清掃装置２１，２２の弁装置２４の非作動状態においては、図２に示すように、第１及び第２弁部３０ａ，３０ｂが完全な閉弁状態、すなわちダイヤフラム３３の各弁体３３ａ，３３ｂが導入流路３８及び吐出流路３９の各開口部３８ａ，３９ａを密閉状態としている。 In the non-operating state of the valve devices 24 of the cleaning devices 21 and 22, as shown in FIG. 2, the first and second valve portions 30a and 30b are completely closed, that is, the valve bodies 33a of the diaphragm 33. 33b seals the openings 38a and 39a of the introduction flow path 38 and the discharge flow path 39.

そして、駆動ポンプ２３の駆動にてエアＣＡ１が連続的に供給されると、付勢バネ３４の付勢による弁体３３ａの閉弁状態の維持作用にて、弁装置２４の導入流路３８及び接続ホース２６を含む導入側の圧力Ｐ１が図６の矢印ａにて示すように上昇する。導入側の圧力Ｐ１は、図３に示すように、弁体３３ａに作用する面積Ｓ１分の部位、すなわち開口部３８ａの面積分の比較的狭い部位に作用する。弁体３３ａに作用する押上力Ｆ１は、導入側の圧力Ｐ１と面積Ｓ１との積、Ｆ１＝Ｐ１×Ｓ１である。そして、導入側の閉弁状態の圧力Ｐ１は、図６に示すように、駆動ポンプ２３と噴射ノズル２５とを接続ホース２６で直接接続した場合に駆動ポンプ２３を駆動したときの接続ホース２６内の圧力である駆動ポンプ２３の吐出圧力Ｐ０（以下、単に「駆動ポンプ２３の吐出圧力Ｐ０」と称する）よりも十分に高い圧力まで高められる。なお、この駆動ポンプ２３の吐出圧力Ｐ０は、駆動ポンプ２３自体の吐出口を締め切った場合（駆動ポンプ２３からの吐出流量がゼロの場合）の吐出圧力ではない。 Then, when the air CA1 is continuously supplied by the drive of the drive pump 23, the introduction flow path 38 of the valve device 24 and the valve device 24 are maintained by the action of maintaining the closed state of the valve body 33a by the urging of the urging spring 34. The pressure P1 on the introduction side including the connection hose 26 rises as shown by the arrow a in FIG. As shown in FIG. 3, the pressure P1 on the introduction side acts on a portion having an area S1 acting on the valve body 33a, that is, a portion having a relatively narrow area equal to the area of the opening 38a. The pushing force F1 acting on the valve body 33a is the product of the pressure P1 on the introduction side and the area S1 and F1 = P1 × S1. Then, as shown in FIG. 6, the pressure P1 in the valve closed state on the introduction side is inside the connection hose 26 when the drive pump 23 is driven when the drive pump 23 and the injection nozzle 25 are directly connected by the connection hose 26. The pressure is increased to a pressure sufficiently higher than the discharge pressure P0 of the drive pump 23 (hereinafter, simply referred to as “discharge pressure P0 of the drive pump 23”). The discharge pressure P0 of the drive pump 23 is not the discharge pressure when the discharge port of the drive pump 23 itself is closed (when the discharge flow rate from the drive pump 23 is zero).

また、導入側の圧力Ｐ１の上昇に伴い、第１弁部３０ａにおいては、図４に示すように、弁体３３ａと開口部３８ａとの間に僅かな隙間を生じさせて、弁室３６に上昇した圧力Ｐ１のエアＣＡ１の一部を漏れＣＡｘとして僅かに漏出させる構成となっている。そのため、弁室３６内の圧力Ｐ２についても徐々に上昇する。弁室３６内の圧力Ｐ２は、図３に示すように、ダイヤフラム３３の薄肉部３３ｃに作用する面積Ｓ２分の部位、すなわち開口部３８ａ，３９ａの面積を除く薄肉部３３ｃ全体（厳密には弁体３３ａ，３３ｂの周縁部を含む）の面積分の比較的広い部位に作用する。この場合、薄肉部３３ｃに作用する押上力Ｆ２は、弁室３６内の圧力Ｐ２と面積Ｓ２との積、Ｆ２＝Ｐ２×Ｓ２である。圧力Ｐ２が作用する薄肉部３３ｃの面積Ｓ２は圧力Ｐ１が作用する弁体３３ａの面積Ｓ１よりも広いため、圧力Ｐ２が圧力Ｐ１より低くても押上力Ｆ２としての影響力は大である。 Further, as the pressure P1 on the introduction side rises, in the first valve portion 30a, as shown in FIG. 4, a slight gap is formed between the valve body 33a and the opening 38a, and the valve chamber 36 has a slight gap. A part of the air CA1 having the increased pressure P1 is slightly leaked as a leak CAx. Therefore, the pressure P2 in the valve chamber 36 also gradually increases. As shown in FIG. 3, the pressure P2 in the valve chamber 36 is the entire thin-walled portion 33c (strictly speaking, the valve) excluding the area S2 that acts on the thin-walled portion 33c of the diaphragm 33, that is, the areas of the openings 38a and 39a. It acts on a relatively large area of the body (including the peripheral edges of the bodies 33a and 33b). In this case, the pushing force F2 acting on the thin portion 33c is the product of the pressure P2 in the valve chamber 36 and the area S2, F2 = P2 × S2. Since the area S2 of the thin-walled portion 33c on which the pressure P2 acts is wider than the area S1 of the valve body 33a on which the pressure P1 acts, even if the pressure P2 is lower than the pressure P1, the influence as the pushing force F2 is large.

そして、導入側の圧力Ｐ１と弁室３６内の圧力Ｐ２とがともに高まり図６に示す点ｂになると、弁体３３ａ側の押上力Ｆ１と薄肉部３３ｃ側の押上力Ｆ２とを合算したダイヤフラム３３の押上力「Ｆ１＋Ｆ２」が所定押付力（付勢バネ３４，３５の両付勢力）を上回る。これにより、図５に示すように、ダイヤフラム３３全体が大きく変位し、第１及び第２弁部３０ａ，３０ｂがともに開弁状態になる。つまり、各弁体３３ａ，３３ｂがともに開口部３８ａ，３９ａから離間し、導入流路３８、弁室３６及び吐出流路３９が導通状態となる。 Then, when both the pressure P1 on the introduction side and the pressure P2 in the valve chamber 36 increase to the point b shown in FIG. 6, the diaphragm which is the sum of the push-up force F1 on the valve body 33a side and the push-up force F2 on the thin-walled portion 33c side. The pushing force "F1 + F2" of 33 exceeds the predetermined pushing force (both urging forces of the urging springs 34 and 35). As a result, as shown in FIG. 5, the entire diaphragm 33 is largely displaced, and the first and second valve portions 30a and 30b are both opened. That is, the valve bodies 33a and 33b are both separated from the openings 38a and 39a, and the introduction flow path 38, the valve chamber 36 and the discharge flow path 39 are in a conductive state.

開弁直前の導入側の圧力Ｐ１は、駆動ポンプ２３の吐出圧力Ｐ０よりも十分に高い図６に示す点ｂまで高められており、開弁により導入流路３８側の高圧のエアＣＡ１が一気に弁室３６を経て吐出流路３９に流れる。吐出側の圧力Ｐ３は、図６の矢印ｃにて示すように急増する。つまり、噴射ノズル２５に高圧のエアが出力エアＣＡ２として供給される。 The pressure P1 on the introduction side immediately before the valve opening is increased to the point b shown in FIG. 6, which is sufficiently higher than the discharge pressure P0 of the drive pump 23, and the high-pressure air CA1 on the introduction flow path 38 side is suddenly increased by the valve opening. It flows through the valve chamber 36 and into the discharge flow path 39. The pressure P3 on the discharge side rapidly increases as shown by the arrow c in FIG. That is, high-pressure air is supplied to the injection nozzle 25 as output air CA2.

一方で、導入側の圧力Ｐ１は、図６の矢印ｄにて示すように急減する。やがて、吐出側の圧力Ｐ３が導入側の圧力Ｐ１と一致する図６に示す点ｅ以降は、両圧力Ｐ３，Ｐ１がともに低下していき、図６に示す点ｆになると、ダイヤフラム３３が開弁から閉弁に切替わる。つまり、弁室３６内の圧力Ｐ２も低下していき、両圧力Ｐ１，Ｐ２に基づくダイヤフラム３３の押上力「Ｆ１＋Ｆ２」よりも付勢バネ３４，３５の付勢力が勝り、第１及び第２弁部３０ａ，３０ｂの各弁体３３ａ，３３ｂが導入流路３８及び吐出流路３９の各開口部３８ａ，３９ａを閉塞する。吐出側の圧力Ｐ３はゼロとなり、導入側の圧力Ｐ１は再び上昇に転じる。導入側の圧力Ｐ１は、漏れＣＡｘによりダイヤフラム３３が開弁するまで再び高められる。そして、上記の繰り返しにより、高圧でパルス状の出力エアＣＡ２が次々に生成される。 On the other hand, the pressure P1 on the introduction side sharply decreases as shown by the arrow d in FIG. Eventually, after the point e shown in FIG. 6 where the pressure P3 on the discharge side coincides with the pressure P1 on the introduction side, both pressures P3 and P1 decrease, and when the pressure P3 on the discharge side reaches the point f shown in FIG. 6, the diaphragm 33 opens. Switch from valve to closed valve. That is, the pressure P2 in the valve chamber 36 also decreases, and the urging force of the urging springs 34 and 35 is superior to the pushing force "F1 + F2" of the diaphragm 33 based on both pressures P1 and P2, and the first and second valves. The valve bodies 33a and 33b of the portions 30a and 30b close the openings 38a and 39a of the introduction flow path 38 and the discharge flow path 39. The pressure P3 on the discharge side becomes zero, and the pressure P1 on the introduction side starts to rise again. The pressure P1 on the introduction side is increased again by the leak CAx until the diaphragm 33 opens. Then, by repeating the above, the output air CA2 in the form of a pulse at high pressure is generated one after another.

また、本実施形態の弁装置２４の動作について、図１１に示す動作遷移図を用いて説明を追加する。本実施形態の弁装置２４は、噴射口の口径が第１の口径であるノズルに直接ホースで駆動ポンプ２３を接続した場合の流量と圧力の特性に等価な第１特性Ｘ１上で動作する場合と、噴射口の口径が上記第１の口径のノズルに比べて極めて小さな口径の第２の口径であるノズルに直接ホースで駆動ポンプ２３を接続した場合の流量と圧力の特性に等価な第２特性Ｘ２上で動作する場合との間で都度切り替わる構成となっている。つまり、第１の口径のノズルに直接ホースで駆動ポンプ２３を接続した場合が、弁体３３ａが開弁した状態に等価であり、第２の口径のノズルに直接ホースで駆動ポンプ２３を接続した場合が、弁体３３ａが閉弁した状態で漏れＣＡｘが生じている状態に等価である。 Further, the operation of the valve device 24 of the present embodiment will be described by using the operation transition diagram shown in FIG. The valve device 24 of the present embodiment operates on the first characteristic X1 equivalent to the flow rate and pressure characteristics when the drive pump 23 is directly connected to the nozzle whose injection port has the first diameter by a hose. A second, which is equivalent to the characteristics of the flow rate and pressure when the drive pump 23 is directly connected to the nozzle having the second diameter of the injection port, which is extremely smaller than the nozzle of the first diameter, with a hose. The configuration is such that the operation is switched between the case of operating on the characteristic X2 and the case of operating on the characteristic X2. That is, the case where the drive pump 23 is directly connected to the nozzle of the first diameter with a hose is equivalent to the state where the valve body 33a is opened, and the drive pump 23 is directly connected to the nozzle of the second diameter with a hose. The case is equivalent to a state in which leakage CAx occurs when the valve body 33a is closed.

すなわち、弁装置２４において、ダイヤフラム３３の弁体３３ａが導入流路３８の開口部３８ａを閉弁している状態では、動作が第２特性Ｘ２上で遷移し（図１１中、矢印α１）、弁装置２４の導入側の圧力Ｐ１が第２特性Ｘ２上で少量の流量にて短時間で高まり蓄圧されていく。このとき、圧力Ｐ１の上昇に伴いエアの流量が僅かに増加しているのは、本実施形態の弁装置２４において、弁体３３ａが閉弁状態であっても開口部３８ａとの間に僅かな隙間を生じさせて、あたかも極めて小さな口径（第２の口径）のノズルから吐出させているかのように漏れＣＡｘを生じさせているためである。 That is, in the valve device 24, when the valve body 33a of the diaphragm 33 closes the opening 38a of the introduction flow path 38, the operation transitions on the second characteristic X2 (arrow α1 in FIG. 11). The pressure P1 on the introduction side of the valve device 24 increases and accumulates in a short time at a small flow rate on the second characteristic X2. At this time, the fact that the flow rate of air slightly increases with the increase of the pressure P1 is only slightly between the valve body 33a and the opening 38a in the valve device 24 of the present embodiment even when the valve body 33a is in the closed state. This is because a large gap is generated, and leakage CAx is generated as if the nozzle is ejected from a nozzle having an extremely small diameter (second diameter).

そして、導入側の圧力Ｐ１が最大圧力Ｐ１ｍａｘに到達すると、弁体３３ａが開状態となるように変位し、その最大圧力Ｐ１ｍａｘに基づく出力エアＣＡ２が弁体３３ａより下流側に吐出される。このときの弁装置２４は、動作が第１特性Ｘ１側に移行する（図１１中、矢印α２）。弁装置２４は、あたかも大きな口径（第２の口径）のノズルから吐出させているかのように第１特性Ｘ１上に沿って（図１１中、矢印α３）、高圧で漏れＣＡｘよりも十分に流量の大きい出力エアＣＡ２を瞬間的に吐出する。 Then, when the pressure P1 on the introduction side reaches the maximum pressure P1max, the valve body 33a is displaced so as to be in an open state, and the output air CA2 based on the maximum pressure P1max is discharged to the downstream side of the valve body 33a. At this time, the operation of the valve device 24 shifts to the first characteristic X1 side (arrow α2 in FIG. 11). The valve device 24 flows along the first characteristic X1 (arrow α3 in FIG. 11) at a high pressure as if it is discharged from a nozzle having a large diameter (second diameter), and has a sufficient flow rate than the leakage CAx. High output air CA2 is instantaneously discharged.

やがて、導入側の圧力Ｐ１が最小圧力Ｐ１ｍｉｎに到達すると、弁体３３ａが閉状態となるように変位し、動作が第２特性Ｘ２側に戻る。以降、矢印α１にて示す蓄圧、漏れの過程、矢印α２にて示す開変位の過程、矢印α３にて示す出力エアＣＡ２の吐出の過程から矢印α１の過程への戻りを繰り返し、すなわち図１２に示すような圧力変化を繰り返すことで、高圧でパルス状の出力エアＣＡ２の生成及び吐出が行われる。 Eventually, when the pressure P1 on the introduction side reaches the minimum pressure P1min, the valve body 33a is displaced so as to be in the closed state, and the operation returns to the second characteristic X2 side. After that, the process of accumulator and leakage indicated by the arrow α1, the process of open displacement indicated by the arrow α2, and the process of discharging the output air CA2 indicated by the arrow α3 are repeatedly returned to the process of the arrow α1, that is, in FIG. By repeating the pressure change as shown, the pulsed output air CA2 is generated and discharged at high pressure.

なお、本実施形態では、駆動ポンプ２３自体の吐出口を締め切ったその締切圧を「Ｐｓ」とすると、最大圧力Ｐ１ｍａｘは、締切圧Ｐｓの１／３より大きくなるように設定される（Ｐｓ／３＜Ｐ１ｍａｘ）。一方、最小圧力Ｐ１ｍｉｎは、締切圧Ｐｓの２／３より小さくなるように設定される（Ｐ１ｍｉｎ＜２Ｐｓ／３）。勿論、Ｐ１ｍｉｎ＜Ｐ１ｍａｘである。また、ダイヤフラム３３の弁体３３ａが開動作する圧力Ｐ１ｍａｘから閉動作する圧力Ｐ１ｍｉｎまで変化するが、圧力Ｐ１ｍｉｎは、圧力Ｐ１ｍａｘの８０％より小さくなるように設定される（Ｐ１ｍｉｎ＜０．８Ｐ１ｍａｘ）。 In the present embodiment, assuming that the cutoff pressure at which the discharge port of the drive pump 23 itself is closed is "Ps", the maximum pressure P1max is set to be larger than 1/3 of the cutoff pressure Ps (Ps /). 3 <P1max). On the other hand, the minimum pressure P1min is set to be smaller than 2/3 of the cutoff pressure Ps (P1min <2Ps / 3). Of course, P1min <P1max. Further, the valve body 33a of the diaphragm 33 changes from the pressure P1max in which the valve body 33a opens to the pressure P1min in which the valve body 33a closes, but the pressure P1min is set to be smaller than 80% of the pressure P1max (P1min <0.8P1max).

このようにして生成される高圧でパルス状の出力エアＣＡ２は、噴射ノズル２５から第１及び第２測距センサ１１，１２の各センシング面１１ａ，１２ａに対して吹付けられる。これにより、各センシング面１１ａ，１２ａに付着し得る雨滴等の異物の効果的な除去清掃が行われ、測距精度を良好に維持することが可能である。しかも、駆動ポンプ２３の吐出圧力Ｐ０よりも十分に高圧の出力エアＣＡ２が生成可能なため、駆動ポンプ２３に小型のものを使用することもできる。 The high-pressure pulsed output air CA2 generated in this way is blown from the injection nozzle 25 onto the sensing surfaces 11a and 12a of the first and second ranging sensors 11 and 12. As a result, foreign matter such as raindrops that may adhere to the sensing surfaces 11a and 12a can be effectively removed and cleaned, and the distance measurement accuracy can be maintained satisfactorily. Moreover, since the output air CA2 having a pressure sufficiently higher than the discharge pressure P0 of the drive pump 23 can be generated, a small drive pump 23 can be used.

なお、図１に示すように、車両１０に一般に搭載されるウォッシャ装置１３と第１及び第２清掃装置２１，２２とを前側ＥＣＵ５１を通じて協働させる構成としてもよい。ウォッシャ装置１３は、タンク１３ａに貯留された洗浄液をウォッシャポンプ１３ｂの駆動にてウインドシールド等に供給するものである。そして、洗浄液を各センシング面１１ａ，１２ａに供給した後に出力エアＣＡ２を吹付けるようにすれば、エアの吹付けだけでは落ちにくい汚れ等の異物除去清掃の効果向上も期待できる。 As shown in FIG. 1, the washer device 13 generally mounted on the vehicle 10 and the first and second cleaning devices 21 and 22 may be configured to cooperate with each other through the front ECU 51. The washer device 13 supplies the cleaning liquid stored in the tank 13a to the windshield or the like by driving the washer pump 13b. If the output air CA2 is sprayed after the cleaning liquid is supplied to the sensing surfaces 11a and 12a, it is expected that the effect of cleaning for removing foreign substances such as dirt that is difficult to remove only by spraying air can be improved.

本実施形態の効果について説明する。
（１－１）駆動ポンプ２３と噴射ノズル２５との間に設けた弁装置２４において、第１弁部３０ａは、弁体３３ａにて導入流路３８を閉弁し、駆動ポンプ２３から供給されるエアＣＡ１を駆動ポンプ２３の吐出圧力Ｐ０よりも高い圧力まで蓄圧する。弁装置２４の補助機構としても機能する第１弁部３０ａや第２弁部３０ｂ、ダイヤフラム３３、弁室３６等は、蓄圧時に導入流路３８側からエアＣＡ１の漏れＣＡｘを生じさせて弁室３６にて蓄圧する。次いで、導入流路３８側及び弁室３６にて蓄圧した両圧力Ｐ１，Ｐ２に基づいて弁体３３ａ，３３ｂを開弁させて、導入流路３８側にて蓄圧したエアＣＡ１を吐出流路３９に出力する。そして、その後再び導入流路３８側にて蓄圧可能に弁体３３ａ，３３ｂを閉弁復帰させる。これにより、駆動ポンプ２３からの連続したエアＣＡ１の吐出で駆動ポンプ２３の吐出圧力Ｐ０よりも圧力を高めた出力エアＣＡ２が繰り返して噴射ノズル２５から各測距センサ１１，１２のセンシング面１１ａ，１２ａに吹付けられるため、駆動ポンプ２３の大型化を図らなくとも、各センシング面１１ａ，１２ａに付着した異物の除去清掃をより向上させることができる。 The effect of this embodiment will be described.
(1-1) In the valve device 24 provided between the drive pump 23 and the injection nozzle 25, the first valve portion 30a closes the introduction flow path 38 at the valve body 33a and is supplied from the drive pump 23. The air CA1 is stored up to a pressure higher than the discharge pressure P0 of the drive pump 23. The first valve portion 30a, the second valve portion 30b, the diaphragm 33, the valve chamber 36, etc., which also function as an auxiliary mechanism of the valve device 24, cause leakage CAx of air CA1 from the introduction flow path 38 side at the time of accumulating pressure, and the valve chamber. Accumulate at 36. Next, the valve bodies 33a and 33b are opened based on the pressures P1 and P2 accumulated in the introduction flow path 38 side and the valve chamber 36, and the air CA1 accumulated in the introduction flow path 38 side is discharged from the discharge flow path 39. Output to. Then, after that, the valve bodies 33a and 33b are closed and returned so that the pressure can be accumulated again on the introduction flow path 38 side. As a result, the output air CA2 whose pressure is higher than the discharge pressure P0 of the drive pump 23 is repeatedly discharged from the drive pump 23 by the continuous discharge of the air CA1, and the sensing surfaces 11a of the distance measuring sensors 11 and 12 are repeatedly discharged from the injection nozzle 25. Since it is sprayed on the 12a, it is possible to further improve the removal and cleaning of foreign matter adhering to the sensing surfaces 11a and 12a without increasing the size of the drive pump 23.

（１－２）第２弁部３０ｂにて吐出流路３９を閉塞して、エアＣＡ１の漏れＣＡｘを弁室３６で蓄圧するようにしたことで、その蓄圧を確実に行うことができる。つまり、本実施形態の弁装置２４は、動作の安定を図ることができる。 (1-2) By blocking the discharge flow path 39 at the second valve portion 30b and accumulating the leaked CAx of the air CA1 in the valve chamber 36, the accumulating pressure can be reliably performed. That is, the valve device 24 of the present embodiment can stabilize the operation.

（１－３）第１弁体３３ａと第２弁体３３ｂとを１つのダイヤフラム３３に一体に設け、第１弁部３０ａと第２弁部３０ｂとを１つの弁装置２４として構成したことで、部品共通化による部品点数及び組付工数の低減や弁装置２４の取扱いが容易となるなどの効果が期待できる。 (1-3) The first valve body 33a and the second valve body 33b are integrally provided in one diaphragm 33, and the first valve portion 30a and the second valve portion 30b are configured as one valve device 24. It is expected that the number of parts and the number of assembly steps will be reduced by standardizing the parts, and the valve device 24 will be easier to handle.

（１－４）導入流路３８側にて蓄圧した圧力Ｐ１が作用する第１弁体３３ａの面積Ｓ１よりも、弁室３６にてエアＣＡ１の漏れＣＡｘを蓄圧した圧力Ｐ２が作用するダイヤフラム３３の薄肉部３３ｃの面積Ｓ２の方を広くしたため、比較的小さい圧力Ｐ２（Ｐ１＞Ｐ２）であってもダイヤフラム３３を動作させることができる。つまり、弁装置２４の動作を円滑にできるなどの効果が期待できる。 (1-4) The diaphragm 33 on which the pressure P2 accumulating the leaked CAx of the air CA1 acts in the valve chamber 36 rather than the area S1 of the first valve body 33a on which the pressure P1 accumulated on the introduction flow path 38 side acts. Since the area S2 of the thin portion 33c of the above is wider, the diaphragm 33 can be operated even with a relatively small pressure P2 (P1> P2). That is, effects such as smooth operation of the valve device 24 can be expected.

（１－５）弁装置２４のカバー部材３２には、ダイヤフラム３３にて区画される背圧室３７と外部とを連通する連通孔３２ｅが設けられて背圧室３７が大気開放される態様のため、ダイヤフラム３３の弁体３３ａ，３３ｂの速やかな動作を損なわないようにすることができる。 (1-5) The cover member 32 of the valve device 24 is provided with a communication hole 32e for communicating the back pressure chamber 37 partitioned by the diaphragm 33 and the outside, and the back pressure chamber 37 is opened to the atmosphere. Therefore, it is possible to prevent the rapid operation of the valve bodies 33a and 33b of the diaphragm 33 from being impaired.

（第２実施形態）
以下、車両用清掃システム及びその清掃方法の第２実施形態について説明する。なお、本実施形態では、車両用清掃システムに用いる弁装置の構成が異なるため、弁装置を中心に説明する。 (Second Embodiment)
Hereinafter, a second embodiment of the vehicle cleaning system and the cleaning method thereof will be described. In this embodiment, since the configuration of the valve device used in the vehicle cleaning system is different, the valve device will be mainly described.

図７及び図８に示すように、本実施形態の弁装置２４ａは、第１実施形態の弁装置２４における第２弁部３０ｂが省略され、第１弁部３０ａのみを有する構成である。以下、第１弁部３０ａ及び第１弁体３３ａは単に、弁部３０ａ及び弁体３３ａとする。 As shown in FIGS. 7 and 8, the valve device 24a of the present embodiment has a configuration in which the second valve portion 30b in the valve device 24 of the first embodiment is omitted and only the first valve portion 30a is provided. Hereinafter, the first valve portion 30a and the first valve body 33a are simply referred to as the valve portion 30a and the valve body 33a.

本実施形態のダイヤフラム３３は、弁部３０ａを構成する弁体３３ａが略中央部に設けられる。これに対応して、導入流路３８の開口部３８ａは、ベース部材３１の基台部３１ａにおける底壁部３１ｃの略中央部に位置し、第１実施形態と同様に円筒状に突出している。一方、吐出流路３９の開口部３９ａは、底壁部３１ｃの周縁部に移設されるとともに突出しない開口形状に変更され、弁体３３ａと干渉しないようにしている。 In the diaphragm 33 of the present embodiment, the valve body 33a constituting the valve portion 30a is provided in a substantially central portion. Correspondingly, the opening 38a of the introduction flow path 38 is located at a substantially central portion of the bottom wall portion 31c in the base portion 31a of the base member 31, and protrudes in a cylindrical shape as in the first embodiment. .. On the other hand, the opening 39a of the discharge flow path 39 is relocated to the peripheral edge of the bottom wall portion 31c and changed to an opening shape that does not protrude so as not to interfere with the valve body 33a.

また、弁部３０ａの弁体３３ａを付勢する付勢バネ３４のみが用いられる。本実施形態の付勢バネ３４は、側方視で逆円錐台状をなし、下端部が弁体３３ａに当接、上端部がカバー部材３２の上壁部３２ａに当接する。また、付勢バネ３４は、自身の上端部が下端部より幅広に形成され、カバー部材３２の側壁部３２ｂにて移動規制される。つまり、上壁部３２ａに付勢バネ３４の位置規制用の突部は不要である。また、上壁部３２ａは、背圧室３７とカバー部材３２の外部と連通する（大気開放された）例えば１つの連通孔３２ｅを有する。連通孔３２ｅは、上壁部３２ａの略中央部に設け、付勢バネ３４の上端部の幅方向内側に位置させている。 Further, only the urging spring 34 that urges the valve body 33a of the valve portion 30a is used. The urging spring 34 of the present embodiment has an inverted truncated cone shape when viewed from the side, the lower end portion abuts on the valve body 33a, and the upper end portion abuts on the upper wall portion 32a of the cover member 32. Further, the urging spring 34 is formed so that the upper end portion thereof is wider than the lower end portion thereof, and the movement of the urging spring 34 is restricted by the side wall portion 32b of the cover member 32. That is, the upper wall portion 32a does not need a protrusion for restricting the position of the urging spring 34. Further, the upper wall portion 32a has, for example, one communication hole 32e that communicates with the back pressure chamber 37 and the outside of the cover member 32 (open to the atmosphere). The communication hole 32e is provided in a substantially central portion of the upper wall portion 32a and is located inside the upper end portion of the urging spring 34 in the width direction.

本実施形態の動作及び作用について説明する。弁装置２４ａを中心に説明する。
図７に示すように、弁装置２４ａの非作動状態においては、弁部３０ａが完全な閉弁状態、すなわちダイヤフラム３３の弁体３３ａが導入流路３８の開口部３８ａを密閉状態としている。そして、駆動ポンプ２３の駆動にてエアＣＡ１が連続的に供給されると、付勢バネ３４の付勢による弁体３３ａの閉弁状態の維持作用にて、弁装置２４ａの導入流路３８及び接続ホース２６を含む導入側の圧力Ｐ１が上昇する。本実施形態においても第１実施形態と同様に、導入側の圧力Ｐ１は、図８に示すように、弁体３３ａに作用する面積Ｓ１分の部位、すなわち開口部３８ａの面積分の比較的狭い部位に作用する。この場合、弁体３３ａに作用する押上力Ｆ１は、導入側の圧力Ｐ１と面積Ｓ１との積、Ｆ１＝Ｐ１×Ｓ１である。そして、導入側の閉弁状態の圧力Ｐ１は、駆動ポンプ２３と噴射ノズル２５とを接続ホース２６で直接接続した場合に駆動ポンプ２３を駆動したときの接続ホース２６内の圧力である駆動ポンプ２３の吐出圧力Ｐ０よりも十分に高い圧力まで高められる。 The operation and operation of this embodiment will be described. The valve device 24a will be mainly described.
As shown in FIG. 7, in the non-operating state of the valve device 24a, the valve portion 30a is in a completely closed state, that is, the valve body 33a of the diaphragm 33 closes the opening 38a of the introduction flow path 38. Then, when the air CA1 is continuously supplied by the drive of the drive pump 23, the introduction flow path 38 of the valve device 24a and the valve device 24a are maintained by the action of maintaining the closed state of the valve body 33a by the urging of the urging spring 34. The pressure P1 on the introduction side including the connection hose 26 rises. In the present embodiment as well, as in the first embodiment, the pressure P1 on the introduction side is relatively narrow as a portion of the area S1 acting on the valve body 33a, that is, the area of the opening 38a, as shown in FIG. It acts on the site. In this case, the pushing force F1 acting on the valve body 33a is the product of the pressure P1 on the introduction side and the area S1, F1 = P1 × S1. The pressure P1 in the valve closed state on the introduction side is the pressure in the connection hose 26 when the drive pump 23 and the injection nozzle 25 are directly connected by the connection hose 26. The pressure is increased to a pressure sufficiently higher than the discharge pressure P0 of.

また、導入側の圧力Ｐ１の上昇に伴い、弁部３０ａにおいては、図９に示すように、弁体３３ａと開口部３８ａとの間に僅かな隙間を生じさせて、弁室３６にエアＣＡ１の一部を漏れＣＡｘとして僅かに漏出させる構成となっている。本実施形態では、第１実施形態の第２弁部３０ｂ（図２参照）に相当するものが無く弁室３６が吐出流路３９と常に連通状態にあるものの、その先の噴射ノズル２５が絞り部として機能、すなわちエアＣＡ１の一部が弁室３６に漏れＣＡｘとして漏出する量（導入流路３８から弁室３６への漏出による流入量）よりも噴射ノズル２５から流出量が少ないため、第１実施形態と同様、弁室３６内の圧力Ｐ２についても徐々に上昇する。本実施形態では、弁室３６内の圧力Ｐ２は、吐出流路３９内の圧力、すなわち吐出側の圧力Ｐ３とともに上昇する。弁室３６内の圧力Ｐ２は、ダイヤフラム３３の薄肉部３３ｃに作用する面積Ｓ２分の部位、すなわち開口部３８ａの面積を除く薄肉部３３ｃ全体（厳密には弁体３３ａの周縁部を含む）の面積分の比較的広い部位に作用する。薄肉部３３ｃに作用する押上力Ｆ２は、弁室３６内の圧力Ｐ２と面積Ｓ２との積、Ｆ２＝Ｐ２×Ｓ２である。本実施形態においても第１実施形態と同様、圧力Ｐ２が作用する薄肉部３３ｃの面積Ｓ２は圧力Ｐ１が作用する弁体３３ａの面積Ｓ１よりも広いため、圧力Ｐ２が圧力Ｐ１より低くても押上力Ｆ２としての影響力は大である。 Further, as the pressure P1 on the introduction side rises, in the valve portion 30a, as shown in FIG. 9, a slight gap is created between the valve body 33a and the opening 38a, and the air CA1 in the valve chamber 36. It is configured to leak a part of the above as a leak CAx. In the present embodiment, there is no corresponding to the second valve portion 30b (see FIG. 2) of the first embodiment, and the valve chamber 36 is always in communication with the discharge flow path 39, but the injection nozzle 25 beyond that is focused. Since the amount of outflow from the injection nozzle 25 is smaller than the amount of the air CA1 leaking into the valve chamber 36 as a CAx (the amount of inflow due to the leakage from the introduction flow path 38 to the valve chamber 36), that is, the amount of the air CA1 leaks to the valve chamber 36. Similar to the first embodiment, the pressure P2 in the valve chamber 36 gradually increases. In the present embodiment, the pressure P2 in the valve chamber 36 rises together with the pressure in the discharge flow path 39, that is, the pressure P3 on the discharge side. The pressure P2 in the valve chamber 36 is a portion of the area S2 acting on the thin-walled portion 33c of the diaphragm 33, that is, the entire thin-walled portion 33c excluding the area of the opening 38a (strictly, the peripheral portion of the valve body 33a is included). It acts on a relatively large area. The pushing force F2 acting on the thin portion 33c is the product of the pressure P2 in the valve chamber 36 and the area S2, F2 = P2 × S2. Also in the present embodiment, as in the first embodiment, the area S2 of the thin wall portion 33c on which the pressure P2 acts is wider than the area S1 of the valve body 33a on which the pressure P1 acts, so that the push-up is performed even if the pressure P2 is lower than the pressure P1. The influence as a force F2 is great.

そして、導入側の圧力Ｐ１と弁室３６内の圧力Ｐ２とがともに高まり、弁体３３ａ側の押上力Ｆ１と薄肉部３３ｃ側の押上力Ｆ２とを合算したダイヤフラム３３の押上力「Ｆ１＋Ｆ２」が所定押付力（付勢バネ３４の付勢力）を上回る。これにより、図１０に示すように、ダイヤフラム３３全体が大きく変位し、弁部３０ａが開弁状態になる。つまり、弁体３３ａが開口部３８ａから離間し、導入流路３８と弁室３６及び吐出流路３９とが導通状態となる。 Then, both the pressure P1 on the introduction side and the pressure P2 in the valve chamber 36 increase, and the push-up force "F1 + F2" of the diaphragm 33, which is the sum of the push-up force F1 on the valve body 33a side and the push-up force F2 on the thin wall portion 33c side, is obtained. It exceeds the predetermined pressing force (the urging force of the urging spring 34). As a result, as shown in FIG. 10, the entire diaphragm 33 is greatly displaced, and the valve portion 30a is opened. That is, the valve body 33a is separated from the opening 38a, and the introduction flow path 38, the valve chamber 36, and the discharge flow path 39 are in a conductive state.

開弁直前の導入側の圧力Ｐ１は、駆動ポンプ２３の吐出圧力Ｐ０よりも十分に高められており、開弁により導入流路３８側の高圧のエアＣＡ１が一気に弁室３６を経て吐出流路３９に流れる。吐出側の圧力Ｐ３は急増し、噴射ノズル２５に高圧のエアが出力エアＣＡ２として供給される。 The pressure P1 on the introduction side immediately before the valve opening is sufficiently higher than the discharge pressure P0 of the drive pump 23, and the high-pressure air CA1 on the introduction flow path 38 side at once passes through the valve chamber 36 and the discharge flow path due to the valve opening. It flows to 39. The pressure P3 on the discharge side rapidly increases, and high-pressure air is supplied to the injection nozzle 25 as output air CA2.

一方で、導入側の圧力Ｐ１は急減し、やがてダイヤフラム３３が開弁から閉弁に切替わる。つまり、両圧力Ｐ１，Ｐ２に基づくダイヤフラム３３の押上力「Ｆ１＋Ｆ２」よりも付勢バネ３４の付勢力が勝り、弁部３０ａの弁体３３ａが導入流路３８の開口部３８ａを閉塞する。吐出側の圧力Ｐ３はゼロとなり、導入側の圧力Ｐ１は再び上昇に転じる。導入側の圧力Ｐ１は、漏れＣＡｘによりダイヤフラム３３が開弁するまで再び高められる。このようにして本実施形態においても、上記の繰り返しにより、高圧でパルス状の出力エアＣＡ２が生成されるようになっている。 On the other hand, the pressure P1 on the introduction side suddenly decreases, and the diaphragm 33 eventually switches from valve opening to valve closing. That is, the urging force of the urging spring 34 is superior to the pushing force "F1 + F2" of the diaphragm 33 based on both pressures P1 and P2, and the valve body 33a of the valve portion 30a closes the opening 38a of the introduction flow path 38. The pressure P3 on the discharge side becomes zero, and the pressure P1 on the introduction side starts to rise again. The pressure P1 on the introduction side is increased again by the leak CAx until the diaphragm 33 opens. In this way, also in this embodiment, the pulsed output air CA2 is generated at high pressure by repeating the above.

本実施形態の効果について説明する。
（２－１）本実施形態の弁装置２４ａにおいて、弁部３０ａについては第１実施形態と同様に、駆動ポンプ２３から供給されるエアＣＡ１を駆動ポンプ２３の吐出圧力Ｐ０よりも高い圧力まで蓄圧する。一方、弁装置２４ａの補助機構としても機能する弁部３０ａ、ダイヤフラム３３、弁室３６等は、蓄圧時に導入流路３８側からエアＣＡ１の漏れＣＡｘを生じさせて弁室３６及びその下流側の吐出流路３９を含んで蓄圧する。次いで、導入流路３８側及び弁室３６にて蓄圧した両圧力Ｐ１，Ｐ２に基づいて弁体３３ａを開弁させて、導入流路３８側にて蓄圧したエアＣＡ１を吐出流路３９に出力する。そして、その後再び導入流路３８側にて蓄圧可能に弁体３３ａを閉弁復帰させる。このような構成の本実施形態においても、駆動ポンプ２３からの連続したエアＣＡ１の吐出で駆動ポンプ２３の吐出圧力Ｐ０よりも圧力を高めた出力エアＣＡ２が繰り返して噴射ノズル２５から各測距センサ１１，１２のセンシング面１１ａ，１２ａに吹付けられるため、駆動ポンプ２３の大型化を図らなくとも、各センシング面１１ａ，１２ａに付着した異物の除去清掃をより向上させることができる。 The effect of this embodiment will be described.
(2-1) In the valve device 24a of the present embodiment, the valve portion 30a stores the air CA1 supplied from the drive pump 23 to a pressure higher than the discharge pressure P0 of the drive pump 23, as in the first embodiment. do. On the other hand, the valve portion 30a, the diaphragm 33, the valve chamber 36, etc., which also function as an auxiliary mechanism of the valve device 24a, cause leakage CAx of the air CA1 from the introduction flow path 38 side at the time of accumulating pressure, and cause leakage CAx of the air CA1 on the valve chamber 36 and its downstream side. The pressure is accumulated including the discharge flow path 39. Next, the valve body 33a is opened based on both pressures P1 and P2 accumulated in the introduction flow path 38 side and the valve chamber 36, and the air CA1 accumulated in the introduction flow path 38 side is output to the discharge flow path 39. do. Then, after that, the valve body 33a is closed and returned so that the pressure can be accumulated again on the introduction flow path 38 side. Also in the present embodiment having such a configuration, the output air CA2 whose pressure is higher than the discharge pressure P0 of the drive pump 23 by the continuous discharge of the air CA1 from the drive pump 23 repeatedly repeats each distance measuring sensor from the injection nozzle 25. Since the spray is sprayed on the sensing surfaces 11a and 12a of the 11 and 12, it is possible to further improve the removal and cleaning of foreign matter adhering to the sensing surfaces 11a and 12a without increasing the size of the drive pump 23.

（２－２）噴射ノズル２５を絞り部として機能させて、エアＣＡ１の漏れＣＡｘを弁室３６及びその下流側の吐出流路３９を含んで蓄圧するようにしたことで、第１実施形態で用いていた第２弁部３０ｂを省略することができる。つまり、本実施形態の弁装置２４ａは、簡素に構成することができる。 (2-2) In the first embodiment, the injection nozzle 25 is made to function as a throttle portion so that the leaked CAx of the air CA1 is accumulated including the valve chamber 36 and the discharge flow path 39 on the downstream side thereof. The second valve portion 30b used can be omitted. That is, the valve device 24a of the present embodiment can be simply configured.

（２－３）導入流路３８側にて蓄圧した圧力Ｐ１が作用する弁体３３ａの面積Ｓ１よりも、弁室３６等にてエアＣＡ１の漏れＣＡｘを蓄圧した圧力Ｐ２が作用するダイヤフラム３３の薄肉部３３ｃの面積Ｓ２の方を広くしたため、比較的小さい圧力Ｐ２であってもダイヤフラム３３を動作させることができる。つまり、本実施形態においても、弁装置２４ａの動作を円滑にできるなどの効果が期待できる。 (2-3) The diaphragm 33 on which the pressure P2 accumulating the leaked CAx of the air CA1 acts rather than the area S1 of the valve body 33a on which the pressure P1 accumulated on the introduction flow path 38 side acts. Since the area S2 of the thin portion 33c is wider, the diaphragm 33 can be operated even with a relatively small pressure P2. That is, even in this embodiment, effects such as smooth operation of the valve device 24a can be expected.

（２－４）弁装置２４ａのカバー部材３２においても、ダイヤフラム３３にて区画される背圧室３７と外部とを連通する連通孔３２ｅが設けられて背圧室３７が大気開放される態様のため、ダイヤフラム３３の弁体３３ａの速やかな動作を損なわないようにすることができる。 (2-4) Also in the cover member 32 of the valve device 24a, a communication hole 32e for communicating the back pressure chamber 37 partitioned by the diaphragm 33 and the outside is provided so that the back pressure chamber 37 is opened to the atmosphere. Therefore, it is possible to prevent the rapid operation of the valve body 33a of the diaphragm 33 from being impaired.

本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・弁装置２４，２４ａの構成は一例であり、適宜変更してもよい。 This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
-The configuration of the valve devices 24 and 24a is an example, and may be changed as appropriate.

例えば、第１実施形態の弁装置２４において、第２弁部３０ｂを第１弁部３０ａと略同一の弁構造にて構成したが、第２弁部３０ｂに第１弁部３０ａとは異なる弁構造のものを用いてもよい。 For example, in the valve device 24 of the first embodiment, the second valve portion 30b has a valve structure substantially the same as that of the first valve portion 30a, but the second valve portion 30b has a valve different from that of the first valve portion 30a. A structure may be used.

また、第１実施形態の弁装置２４が第１弁部３０ａと第２弁部３０ｂとを１つの構成体として構成されていたが、これに限定されない。例えば、駆動ポンプ２３と噴射ノズル２５との間に第２実施形態の弁装置２４ａを直列に２個接続して、駆動ポンプ２３側の弁装置２４ａを第１弁部３０ａ、噴射ノズル２５側の弁装置２４ａを第２弁部３０ｂとした第１実施形態と同等の弁装置として構成してもよい。このようにしても第１実施形態と同様、第２実施形態の弁装置２４ａを用いつつも安定して断続的に高圧に高められた出力エアＣＡ２を噴射ノズル２５に供給することができる。 Further, the valve device 24 of the first embodiment is configured with the first valve portion 30a and the second valve portion 30b as one component, but the present invention is not limited to this. For example, two valve devices 24a of the second embodiment are connected in series between the drive pump 23 and the injection nozzle 25, and the valve device 24a on the drive pump 23 side is connected to the first valve portion 30a and the injection nozzle 25 side. The valve device 24a may be configured as a valve device equivalent to that of the first embodiment in which the second valve portion 30b is used. Even in this way, as in the first embodiment, the output air CA2 that is stably and intermittently increased to a high pressure can be supplied to the injection nozzle 25 while using the valve device 24a of the second embodiment.

また、両実施形態の弁装置２４，２４ａにおいて、弁体３３ａと開口部３８ａとの間からエアＣＡ１の漏れＣＡｘを生じさせて弁室３６にて蓄圧させたが、漏れＣＡｘを弁室３６に漏出させる流路を別途設ける態様、例えば、導入流路３８と弁室３６とが連通する極微小な穴やスリット、若しくは開口部３８ａの弁体３３ａが当接する当接面を粗面とするなどとしてもよい。 Further, in the valve devices 24 and 24a of both embodiments, a leak CAx of the air CA1 was generated between the valve body 33a and the opening 38a and the pressure was accumulated in the valve chamber 36, but the leak CAx was accumulated in the valve chamber 36. An embodiment in which a flow path for leakage is separately provided, for example, a very small hole or slit in which the introduction flow path 38 and the valve chamber 36 communicate with each other, or a contact surface with which the valve body 33a of the opening 38a abuts is made a rough surface. May be.

また、両実施形態の弁装置２４，２４ａのダイヤフラム３３において、圧力Ｐ２の作用する薄肉部３３ｃの面積Ｓ２が圧力Ｐ１の作用する弁体３３ａの面積Ｓ１よりも広い設定（Ｓ２＞Ｓ１）であったが、面積Ｓ１と面積Ｓ２とが同等の設定（Ｓ１＝Ｓ２）としてもよく、また面積Ｓ１が面積Ｓ２よりも広い設定（Ｓ１＞Ｓ２）としてもよい。つまり、本態様及び上記実施形態も含め、弁体３３ａの開弁時において、弁体３３ａを含む面積Ｓ１を有する部分に圧力Ｐ１を作用させることに加え、弁体３３ａの周囲の面積Ｓ２を有する部分にも圧力Ｐ２を作用させて、より広い面積にて弁体３３ａの押し上げ力が生じるようにすればよい。 Further, in the diaphragm 33 of the valve devices 24 and 24a of both embodiments, the area S2 of the thin-walled portion 33c on which the pressure P2 acts is set to be wider than the area S1 of the valve body 33a on which the pressure P1 acts (S2> S1). However, the area S1 and the area S2 may be set to be equivalent (S1 = S2), or the area S1 may be set to be wider than the area S2 (S1> S2). That is, including this aspect and the above embodiment, when the valve body 33a is opened, in addition to applying the pressure P1 to the portion having the area S1 including the valve body 33a, the valve body 33a has an area S2 around the valve body 33a. The pressure P2 may also be applied to the portion so that the pushing force of the valve body 33a is generated in a wider area.

上記各実施形態の繰り返しになるが、弁装置２４，２４ａは、導入流路３８を開閉する弁体３３ａを含むダイヤフラム３３と弁体３３ａを閉弁方向に付勢する付勢バネ３４とを有しており、弁体３３ａによる導入流路３８の閉弁状態において駆動ポンプ２３からエアＣＡ１が供給されることで弁体３３ａの面積Ｓ１の部分３３ａ１（第１加圧部分、図３及び図８参照）が加圧される。駆動ポンプ２３からエアＣＡ１が更に供給されて導入流路３８の圧力Ｐ１が高まると、弁体３３ａが閉弁状態であるものの導入流路３８側からエアＣＡ１の漏れを生じさせ、その漏れ側の弁室３６も圧力Ｐ２が高まり弁体３３ａの周囲の薄肉部３３ｃの面積Ｓ２の部分３３ｃ１（第２加圧部分、図３及び図８参照）が加圧される。そのため、弁体３３ａを含むダイヤフラム３３は、エアＣＡ１により弁体３３ａ部分に加えて弁体３３ａの周囲部位の薄肉部３３ｃも加圧される。これにより、駆動ポンプ２３から導入流路３８に供給されるエアＣＡ１にて弁体３３ａの面積Ｓ１の部分３３ａ１だけへの加圧では付勢バネ３４の付勢力に抗して開弁できないその弁体３３ａを、弁体３３ａ部分への加圧に加えて薄肉部３３ｃの面積Ｓ２の部分３３ｃ１に対しても加圧して付勢バネ３４の付勢力に抗した加圧力を弁体３３ａを含むダイヤフラム３３に作用させることで開弁状態となる。このダイヤフラム３３の薄肉部３３ｃを加圧して開弁状態に至るまでの間に導入流路３８側において駆動ポンプ２３の吐出圧力Ｐ０よりも高い圧力まで蓄圧されるので、この蓄圧したエアＣＡ１が出力エアＣＡ２として弁体３３ａの開弁により瞬間的に吐出流路３９に出力される。そして、吐出流路３９へのエアＣＡ１の出力に基づき、その後再び弁体３３ａが閉弁復帰となる。これにより、駆動ポンプ２３からの連続したエアＣＡ１の吐出で駆動ポンプ２３の吐出圧力Ｐ０よりも圧力を高めた出力エアＣＡ２が繰り返して噴射ノズル２５から清掃対象に吹付けられるため、駆動ポンプ２３の大型化を図らなくとも、清掃対象に付着した異物の除去等の清掃力を維持若しくはより向上させることが可能である。 To repeat each of the above embodiments, the valve devices 24 and 24a have a diaphragm 33 including a valve body 33a for opening and closing the introduction flow path 38 and an urging spring 34 for urging the valve body 33a in the valve closing direction. The air CA1 is supplied from the drive pump 23 in the closed state of the introduction flow path 38 by the valve body 33a, so that the portion 33a1 of the area S1 of the valve body 33a (first pressure portion, FIGS. 3 and 8). See) is pressurized. When the air CA1 is further supplied from the drive pump 23 and the pressure P1 of the introduction flow path 38 increases, the valve body 33a is in a closed state, but the air CA1 leaks from the introduction flow path 38 side, and the air CA1 leaks from the leakage side. In the valve chamber 36, the pressure P2 also increases, and the portion 33c1 (second pressurized portion, see FIGS. 3 and 8) of the area S2 of the thin-walled portion 33c around the valve body 33a is pressurized. Therefore, in the diaphragm 33 including the valve body 33a, not only the valve body 33a portion but also the thin portion 33c of the peripheral portion of the valve body 33a is pressurized by the air CA1. As a result, the valve cannot be opened against the urging force of the urging spring 34 by pressurizing only the portion 33a1 of the area S1 of the valve body 33a with the air CA1 supplied from the drive pump 23 to the introduction flow path 38. In addition to applying pressure to the valve body 33a portion, the body 33a is also pressed against the portion 33c1 of the area S2 of the thin-walled portion 33c to apply a pressing force against the urging force of the urging spring 34 to the diaphragm including the valve body 33a. By acting on 33, the valve is opened. Since the thin portion 33c of the diaphragm 33 is pressurized to a pressure higher than the discharge pressure P0 of the drive pump 23 on the introduction flow path 38 side until the valve is opened, the accumulated air CA1 is output. As air CA2, it is instantaneously output to the discharge flow path 39 by opening the valve body 33a. Then, based on the output of the air CA1 to the discharge flow path 39, the valve body 33a is returned to the closed valve again. As a result, the output air CA2 whose pressure is higher than the discharge pressure P0 of the drive pump 23 by the continuous discharge of the air CA1 from the drive pump 23 is repeatedly sprayed from the injection nozzle 25 to the cleaning target. It is possible to maintain or further improve the cleaning power such as removal of foreign matter adhering to the object to be cleaned without increasing the size.

・流体としてエアを清掃対象に吹付けるものであったが、気液混合流体や液体を吹付ける態様としてもよい。液体を用いる場合、自身も確実に清掃対象から飛散することが好ましい。 -Although air was blown to the object to be cleaned as a fluid, a gas-liquid mixed fluid or a liquid may be blown. When a liquid is used, it is preferable that the liquid itself is surely scattered from the object to be cleaned.

・測距センサ１１，１２は、車両１０の前端中央部と車両１０の後端中央部にそれぞれ配置されているものであったが、車両１０の左右側面に配置されているものであってもよい。 The distance measuring sensors 11 and 12 were arranged at the center of the front end of the vehicle 10 and the center of the rear end of the vehicle 10, respectively, but even if they are arranged on the left and right sides of the vehicle 10. good.

・測距センサ１１，１２（センシング面１１ａ，１２ａ）を清掃対象としたが、これに限らない。例えば、車両１０の周囲を撮像するカメラ、これら光学センサ以外のセンサ、センサ以外で、例えば図１に示すヘッドライト１５、テールランプ１６、ミラー１７等を清掃対象としてもよい。 -The distance measuring sensors 11 and 12 (sensing surfaces 11a and 12a) are targeted for cleaning, but the present invention is not limited to this. For example, a camera that images the surroundings of the vehicle 10, sensors other than these optical sensors, and other than the sensors, for example, the headlight 15, the tail lamp 16, the mirror 17, and the like shown in FIG. 1 may be targeted for cleaning.

また、反射鏡を用いる従前のミラー１７のみならず、近年そのミラー１７に代わって採用されつつあるデジタルアウターミラー１８のカメラの撮像面を清掃対象とする場合には、駆動ポンプ２３及び弁装置２４にて生成した出力エアＣＡ２を噴射ノズル２５からミラー１８のカメラの撮像面に向けて吹付けるようにする。 Further, when the image pickup surface of the camera of the digital outer mirror 18, which has been adopted in place of the mirror 17 in recent years, as well as the conventional mirror 17 using a reflector, is to be cleaned, the drive pump 23 and the valve device 24 are used. The output air CA2 generated in 1 is blown from the injection nozzle 25 toward the image pickup surface of the camera of the mirror 18.

１０…車両、１１，１２…第１及び第２測距センサ（清掃対象）、１５…ヘッドライト（清掃対象）、１６…テールランプ（清掃対象）、１７…ミラー（清掃対象）、１８…デジタルアウターミラー（清掃対象）、２０…車両用清掃システム、２３…駆動ポンプ、２４，２４ａ…弁装置、２５…噴射ノズル、３０ａ…第１弁部（弁部、補助機構）、３０ｂ…第２弁部（補助機構）、３３…ダイヤフラム（補助機構）、３３ａ…第１弁体（弁体）、３３ａ１…部分（第１加圧部分）、３３ｂ…第２弁体、３３ｃ…薄肉部、３３ｃ１…部分（第２加圧部分）、３４，３５…付勢バネ（付勢部材）、３６…弁室（補助機構）、３８…導入流路、３９…吐出流路、ＣＡ１…エア（流体）、ＣＡｘ…漏れ、Ｐ０…吐出圧力、Ｐ１，Ｐ２…圧力、Ｐ１ｍａｘ…最大圧力、Ｐ１ｍｉｎ…最小圧力、Ｐｓ…締切圧、Ｓ１…面積（第１の面積）、Ｓ２…面積（第２の面積）。
10 ... Vehicle, 11, 12 ... 1st and 2nd distance measuring sensors (cleaning target), 15 ... Headlight (cleaning target), 16 ... Tail lamp (cleaning target), 17 ... Mirror (cleaning target), 18 ... Digital outer Mirror (cleaning target), 20 ... Vehicle cleaning system, 23 ... Drive pump, 24, 24a ... Valve device, 25 ... Injection nozzle, 30a ... First valve section (valve section, auxiliary mechanism), 30b ... Second valve section (Auxiliary mechanism), 33 ... Diaphragm (auxiliary mechanism), 33a ... First valve body (valve body), 33a1 ... Part (first pressure part), 33b ... Second valve body, 33c ... Thin-walled part, 33c1 ... Part (Second pressure portion), 34, 35 ... urging spring (urging member), 36 ... valve chamber (auxiliary mechanism), 38 ... introduction flow path, 39 ... discharge flow path, CA1 ... air (fluid), CAx ... Leakage, P0 ... Discharge pressure, P1, P2 ... Pressure, P1max ... Maximum pressure, P1min ... Minimum pressure, Ps ... Deadline pressure, S1 ... Area (first area), S2 ... Area (second area).

Claims (13)

駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７，１８）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）であって、
前記駆動ポンプと前記噴射ノズルとの間に弁装置（２４，２４ａ）を設け、
前記弁装置は、
前記駆動ポンプ側である前記流体の導入流路（３８）を弁体（３３ａ）により閉弁し、前記駆動ポンプから供給される前記流体を前記駆動ポンプの吐出圧力（Ｐ０）よりも高い圧力まで蓄圧する弁部（３０ａ）と、
前記蓄圧時に前記導入流路側から前記流体の漏れ（ＣＡｘ）を生じさせその漏れによる漏れ側での蓄圧と、前記導入流路側及び前記漏れ側にて蓄圧した両圧力（Ｐ１，Ｐ２）に基づく前記弁体の開弁と、前記弁体の開弁に基づき前記導入流路側にて蓄圧した前記流体の前記噴射ノズル側である吐出流路（３９）への出力と、前記吐出流路への前記流体の出力に基づき前記導入流路側にて蓄圧可能に前記弁体の閉弁復帰とを行うように構成された補助機構（３０ａ，３０ｂ，３３，３６）と
を備えた、車両用清掃システム。 A fluid (CA1) based on the supply from the drive pump (23) is sprayed from the injection nozzle (25) onto the cleaning target (11, 12, 15, 16, 17, 18) of the vehicle (10) to the cleaning target. A vehicle cleaning system (20) that removes and cleans adhering foreign matter.
A valve device (24, 24a) is provided between the drive pump and the injection nozzle.
The valve device is
The introduction flow path (38) of the fluid on the drive pump side is closed by the valve body (33a), and the fluid supplied from the drive pump is brought to a pressure higher than the discharge pressure (P0) of the drive pump. The valve portion (30a) for accumulating pressure and
The fluid leak (CAx) is generated from the introduction flow path side at the time of the accumulation, and the pressure is accumulated on the leakage side due to the leakage, and the pressure is accumulated on both the introduction flow path side and the leakage side (P1, P2). The valve opening of the valve body, the output of the fluid accumulated in the introduction flow path side based on the valve opening of the valve body to the discharge flow path (39) on the injection nozzle side, and the said to the discharge flow path. A vehicle cleaning system provided with an auxiliary mechanism (30a, 30b, 33, 36) configured to return the valve body to the valve closed so that pressure can be accumulated on the introduction flow path side based on the output of the fluid. 前記弁体を有する前記弁部を第１弁体（３３ａ）を有する第１弁部（３０ａ）としたとき、前記弁装置（２４）の前記補助機構は、第２弁体（３３ｂ）を有する第２弁部（３０ｂ）を含んで構成され、
前記第２弁部は、前記第２弁体により前記吐出流路を閉弁して前記導入流路側からの前記流体の漏れを蓄圧し、前記漏れ側にて蓄圧した圧力を前記第１及び第２弁体の開弁に作用させるように構成された、請求項１に記載の車両用清掃システム。 When the valve portion having the valve body is the first valve portion (30a) having the first valve body (33a), the auxiliary mechanism of the valve device (24) has the second valve body (33b). It is configured to include the second valve portion (30b).
The second valve portion closes the discharge flow path by the second valve body to accumulate the leakage of the fluid from the introduction flow path side, and the pressure accumulated on the leakage side is the first and second valves. 2. The vehicle cleaning system according to claim 1, which is configured to act on the valve opening of the valve body. 前記第１及び第２弁部は、１つの前記弁装置として構成され、
前記第１及び第２弁体は、１つのダイヤフラム（３３）に一体に設けられた、請求項２に記載の車両用清掃システム。 The first and second valve portions are configured as one valve device.
The vehicle cleaning system according to claim 2, wherein the first and second valve bodies are integrally provided on one diaphragm (33). 前記導入流路側にて蓄圧した圧力が作用する前記第１弁体の面積（Ｓ１）よりも、前記漏れ側にて蓄圧した圧力が作用する前記ダイヤフラムの面積（Ｓ２）の方が広い設定にて構成された、請求項３に記載の車両用清掃システム。 The area (S2) of the diaphragm on which the pressure accumulated on the leak side acts is wider than the area (S1) of the first valve body on which the pressure accumulated on the introduction flow path side acts. The vehicle cleaning system according to claim 3, which is configured. 前記噴射ノズルを絞り部として機能させて、前記弁装置（２４ａ）の前記弁部（３０ａ）の下流側において前記導入流路側からの前記流体の漏れを蓄圧し、前記漏れ側にて蓄圧した圧力を前記弁体（３３ａ）の開弁に作用させるように構成された、請求項１に記載の車両用清掃システム。 The injection nozzle is made to function as a throttle portion, and the leakage of the fluid from the introduction flow path side is accumulated on the downstream side of the valve portion (30a) of the valve device (24a), and the pressure accumulated on the leakage side. The vehicle cleaning system according to claim 1, wherein the valve body (33a) is configured to act on the valve opening. 前記弁体は、ダイヤフラム（３３）に一体に設けられ、
前記導入流路側にて蓄圧した圧力が作用する前記弁体の面積（Ｓ１）よりも、前記漏れ側にて蓄圧した圧力が作用する前記ダイヤフラムの面積（Ｓ２）の方が広い設定にて構成された、請求項５に記載の車両用清掃システム。 The valve body is integrally provided with the diaphragm (33).
The area (S2) of the diaphragm on which the pressure accumulated on the leak side acts is wider than the area (S1) of the valve body on which the pressure accumulated on the introduction flow path side acts. The vehicle cleaning system according to claim 5. 前記弁装置は、前記弁体が一体に設けられたダイヤフラム（３３）を有し、筐体（３１，３２）内に配置される前記ダイヤフラムにて前記流体の流れる側の弁室（３６）とその反対側の背圧室（３７）とが区画されてなるものであり、前記筐体には、前記背圧室と外部とを連通して前記背圧室を大気開放するための連通孔（３２ｅ）が設けられた、請求項１～６のいずれか１項に記載の車両用清掃システム。 The valve device has a diaphragm (33) integrally provided with the valve body, and has a valve chamber (36) on the side where the fluid flows in the diaphragm arranged in the housing (31, 32). The back pressure chamber (37) on the opposite side is partitioned, and the housing has a communication hole (a communication hole for communicating the back pressure chamber and the outside and opening the back pressure chamber to the atmosphere). 32e) The vehicle cleaning system according to any one of claims 1 to 6, provided with 32e). 前記弁装置は、前記弁体が一体に設けられたダイヤフラム（３３）と前記ダイヤフラムを付勢する付勢部材（３４，３５）とのみを筐体（３１，３２）内に収容して構成された、請求項１～７のいずれか１項に記載の車両用清掃システム。 The valve device is configured by accommodating only a diaphragm (33) integrally provided with the valve body and an urging member (34, 35) for urging the diaphragm in a housing (31, 32). The vehicle cleaning system according to any one of claims 1 to 7. 駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７，１８）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）であって、
前記駆動ポンプと前記噴射ノズルとの間に弁装置（２４，２４ａ）を設け、
前記弁装置は、
前記駆動ポンプ側である前記流体の導入流路（３８）を開閉する弁体（３３ａ）を含むダイヤフラム（３３）と、前記導入流路の閉弁方向に前記弁体を付勢する付勢部材（３４）とを有し、
前記ダイヤフラムは、前記導入流路の閉弁状態において前記駆動ポンプから供給される前記流体で加圧される前記弁体における第１の面積（Ｓ１）の第１加圧部分（３３ａ１）と、前記導入流路の閉弁状態において前記導入流路側からの前記流体の漏れ（ＣＡｘ）によりその漏れ側で加圧される前記弁体の周囲における第２の面積（Ｓ２）の第２加圧部分（３３ｃ１）とを有し、前記第１及び第２加圧部分への加圧に基づき前記付勢部材の付勢力に抗して開弁されるとともに該開弁による前記噴射ノズル側である吐出流路（３９）への前記流体の出力に基づき閉弁復帰するように構成された、車両用清掃システム。 A fluid (CA1) based on the supply from the drive pump (23) is sprayed from the injection nozzle (25) onto the cleaning target (11, 12, 15, 16, 17, 18) of the vehicle (10) to the cleaning target. A vehicle cleaning system (20) that removes and cleans adhering foreign matter.
A valve device (24, 24a) is provided between the drive pump and the injection nozzle.
The valve device is
A diaphragm (33) including a valve body (33a) that opens and closes the fluid introduction flow path (38) on the drive pump side, and an urging member that urges the valve body in the valve closing direction of the introduction flow path. With (34)
The diaphragm has a first pressure portion (33a1) of a first area (S1) in the valve body pressurized by the fluid supplied from the drive pump in a valve closed state of the introduction flow path, and the diaphragm. The second pressurized portion of the second area (S2) around the valve body, which is pressurized on the leak side by the fluid leakage (CAx) from the introduction flow path side in the valve closed state of the introduction flow path (S2). With 33c1), the valve is opened against the urging force of the urging member based on the pressurization to the first and second pressurizing portions, and the discharge flow on the injection nozzle side by the valve opening. A vehicle cleaning system configured to return to a closed valve based on the output of the fluid to the road (39). 前記弁装置は、前記導入流路側の流体の圧力（Ｐ１）、前記駆動ポンプ自体の吐出口を締め切ったその締切圧（Ｐｓ）を用い、前記弁体が開動作する前記導入流路側の圧力の最大圧力（Ｐ１ｍａｘ）が前記締切圧の１／３より大、すなわちＰｓ／３＜Ｐ１ｍａｘに設定され、前記弁体が閉動作する前記導入流路側の圧力の最小圧力（Ｐ１ｍｉｎ）が前記締切圧の２／３より小、すなわちＰ１ｍｉｎ＜２Ｐｓ／３に設定される、ただしＰ１ｍｉｎ＜Ｐ１ｍａｘである、請求項１～９のいずれか１項に記載の車両用清掃システム。 The valve device uses the pressure of the fluid on the introduction flow path side (P1) and the cutoff pressure (Ps) at which the discharge port of the drive pump itself is closed, and the pressure on the introduction flow path side at which the valve body opens. The maximum pressure (P1max) is set to be larger than 1/3 of the cutoff pressure, that is, Ps / 3 <P1max, and the minimum pressure (P1min) of the pressure on the introduction flow path side in which the valve body closes is the cutoff pressure. The vehicle cleaning system according to any one of claims 1 to 9, which is less than 2/3, that is, set to P1min <2Ps / 3, but P1min <P1max. 前記弁装置は、前記弁体が開動作する前記導入流路側の圧力（Ｐ１）の最大圧力（Ｐ１ｍａｘ）、前記弁体が閉動作する前記導入流路側の圧力の最小圧力（Ｐ１ｍｉｎ）との関係において、最小圧力が最大圧力の８０％より小、すなわちＰ１ｍｉｎ＜０．８Ｐ１ｍａｘに設定される、請求項１～１０のいずれか１項に記載の車両用清掃システム。 The valve device has a relationship between the maximum pressure (P1max) of the pressure (P1) on the introduction flow path side in which the valve body opens and the minimum pressure (P1min) on the introduction flow path side in which the valve body closes. The vehicle cleaning system according to any one of claims 1 to 10, wherein the minimum pressure is less than 80% of the maximum pressure, that is, P1min <0.8P1max. 前記駆動ポンプは、前記流体としてエア（ＣＡ１）を供給するエアポンプである、請求項１～１１のいずれか１項に記載の車両用清掃システム。 The vehicle cleaning system according to any one of claims 1 to 11, wherein the drive pump is an air pump that supplies air (CA1) as the fluid. 駆動ポンプ（２３）からの供給に基づく流体（ＣＡ１）を噴射ノズル（２５）から車両（１０）の清掃対象（１１，１２，１５，１６，１７，１８）に吹付けて、前記清掃対象に付着した異物の除去清掃を行う車両用清掃システム（２０）の清掃方法であって、
前記駆動ポンプと前記噴射ノズルとの間に設けた弁装置（２４，２４ａ）は、
前記駆動ポンプ側である前記流体の導入流路（３８）を弁体（３３ａ）により閉弁し、前記駆動ポンプから供給される前記流体を前記駆動ポンプの吐出圧力（Ｐ０）よりも高い圧力まで蓄圧するとともに、
前記蓄圧時に前記導入流路側から前記流体の漏れ（ＣＡｘ）を生じさせて漏れ側にて蓄圧し、前記導入流路側及び前記漏れ側にて蓄圧した両圧力（Ｐ１，Ｐ２）に基づいて前記弁体を開弁させ、前記弁体の開弁に基づき前記導入流路側にて蓄圧した前記流体を前記噴射ノズル側である吐出流路（３９）に出力し、前記流体の前記吐出流路への出力に基づき前記導入流路側にて蓄圧可能に前記弁体を閉弁復帰させる、車両用清掃システムの清掃方法。 A fluid (CA1) based on the supply from the drive pump (23) is sprayed from the injection nozzle (25) onto the cleaning target (11, 12, 15, 16, 17, 18) of the vehicle (10) to the cleaning target. It is a cleaning method of the vehicle cleaning system (20) that removes and cleans the adhering foreign matter.
The valve device (24, 24a) provided between the drive pump and the injection nozzle is
The introduction flow path (38) of the fluid on the drive pump side is closed by the valve body (33a), and the fluid supplied from the drive pump is brought to a pressure higher than the discharge pressure (P0) of the drive pump. As well as accumulating pressure
When the pressure is accumulated, the fluid leaks (CAx) from the introduction flow path side, the fluid is accumulated on the leak side, and the valve is based on both pressures (P1, P2) accumulated on the introduction flow path side and the leakage side. The body is opened, and the fluid accumulated in the introduction flow path side based on the valve opening of the valve body is output to the discharge flow path (39) on the injection nozzle side, and the fluid is sent to the discharge flow path. A cleaning method for a vehicle cleaning system in which the valve body is closed and returned so that pressure can be accumulated on the introduction flow path side based on the output.
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