JP2008223718A - Cap - Google Patents

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JP2008223718A
JP2008223718A JP2007066668A JP2007066668A JP2008223718A JP 2008223718 A JP2008223718 A JP 2008223718A JP 2007066668 A JP2007066668 A JP 2007066668A JP 2007066668 A JP2007066668 A JP 2007066668A JP 2008223718 A JP2008223718 A JP 2008223718A
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Prior art keywords
fuel
cap
reservoir chamber
fuel reservoir
pipe
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JP2007066668A
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JP4535078B2 (en
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Toshiharu Haniyu
俊治 羽生
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Denso Corp
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Denso Corp
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Priority to JP2007066668A priority Critical patent/JP4535078B2/en
Priority to DE102008000165.1A priority patent/DE102008000165B4/en
Publication of JP2008223718A publication Critical patent/JP2008223718A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dropping of fuel from fuel pipes when removing a cap. <P>SOLUTION: The cap 2 comprises a tubular part 21 for insertion of the fuel pipes 11, 12 and a fuel sump forming part 23 defining a fuel sump chamber 22 communicating with an interior of the tubular part 21 and is attached to the fuel pipes 11, 12 with the fuel sump chamber 22 situated below the fuel pipes 11, 12. Fuel in the fuel pipes 11, 12 is allowed to flow out into the fuel sump chamber 22 in a state that the cap 2 is attached to the fuel pipes 11, 12 and fuel can be prevented from dropping out of the fuel pipes 11, 12 when the cap is removed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、燃料の取り入れ口および取り出し口となる燃料パイプに装着されるキャップに関する。   The present invention relates to a cap that is attached to a fuel pipe that serves as a fuel inlet and outlet.

特許文献１に記載の燃料供給ポンプは、燃料の取り入れ口および取り出し口となる燃料パイプを備えている。   The fuel supply pump described in Patent Document 1 includes a fuel pipe that serves as a fuel inlet and outlet.

そして、このような燃料供給ポンプにおいては、燃料供給ポンプをエンジンまたは車両に組み付けて燃料パイプを外部燃料配管と接続するまでの間は、燃料パイプにキャップを装着して、燃料パイプから燃料が外部に洩れないように、また燃料パイプ内に異物が入らないようにしている。
特開２０００−２４０５３１号公報 In such a fuel supply pump, until the fuel supply pump is assembled to the engine or vehicle and the fuel pipe is connected to the external fuel pipe, a cap is attached to the fuel pipe so that the fuel is externally supplied from the fuel pipe. So that no foreign matter enters the fuel pipe.
JP 2000-240531 A

しかしながら、燃料パイプを外部燃料配管と接続する際にキャップを外すと、燃料パイプから燃料が垂れるという問題があった。   However, if the cap is removed when the fuel pipe is connected to the external fuel pipe, there is a problem that the fuel droops from the fuel pipe.

本発明は上記点に鑑みて、キャップ取り外し時に燃料パイプから燃料が垂れないようにすることを目的とする。   The present invention has been made in view of the above points, and it is an object of the present invention to prevent fuel from dripping from a fuel pipe when a cap is removed.

本発明の第１の特徴では、燃料パイプ（１１、１２）を備える機器（１）に装着されるキャップであって、燃料パイプ（１１、１２）が挿入される筒部（２１）と、この筒部（２１）の内部と連通する燃料溜まり室（２２）を区画形成する燃料溜まり形成部（２３）とを備え、燃料溜まり室（２２）が燃料パイプ（１１、１２）よりも下方に位置するようにして燃料パイプ（１１、１２）に装着可能である。   According to a first aspect of the present invention, a cap is attached to a device (1) including a fuel pipe (11, 12), and a cylindrical portion (21) into which the fuel pipe (11, 12) is inserted, and this A fuel reservoir forming portion (23) defining a fuel reservoir chamber (22) communicating with the inside of the cylindrical portion (21), and the fuel reservoir chamber (22) is positioned below the fuel pipes (11, 12). In this manner, the fuel pipe (11, 12) can be mounted.

このような構成では、燃料パイプ（１１、１２）にキャップを装着した状態で燃料パイプ（１１、１２）内の燃料を燃料溜まり室（２２）に出すことにより、キャップ取り外し時に燃料パイプ（１１、１２）から燃料が垂れることを防止することができる。   In such a configuration, fuel in the fuel pipe (11, 12) is put out to the fuel reservoir chamber (22) with the cap attached to the fuel pipe (11, 12), so that the fuel pipe (11, 12) is removed when the cap is removed. It is possible to prevent the fuel from dripping from 12).

本発明の第２の特徴では、燃料パイプ（１１、１２）を備える機器（１）に装着されるキャップであって、燃料パイプ（１１、１２）が挿入される筒部（２１）と、この筒部（２１）の内部と連通する燃料溜まり室（２２）を区画形成する燃料溜まり形成部（２３）とを備え、筒部（２１）の軸方向に沿って見たときに、燃料溜まり室（２２）は筒部（２１）の内周面よりも外側に位置する。   In the second feature of the present invention, a cap that is attached to a device (1) that includes a fuel pipe (11, 12), a cylinder portion (21) into which the fuel pipe (11, 12) is inserted, and this A fuel reservoir forming portion (23) defining a fuel reservoir chamber (22) communicating with the inside of the cylindrical portion (21), and when viewed along the axial direction of the cylindrical portion (21), the fuel reservoir chamber (22) is located outside the inner peripheral surface of the cylindrical portion (21).

このような構成では、略水平状態の燃料パイプ（１１、１２）にキャップを装着したときに燃料溜まり室（２２）を燃料パイプ（１１、１２）よりも下方に位置させることができる。したがって、燃料パイプ（１１、１２）にキャップを装着した状態で燃料パイプ（１１、１２）内の燃料を燃料溜まり室（２２）に出すことにより、キャップ取り外し時に燃料パイプ（１１、１２）から燃料が垂れることを防止することができる。   In such a configuration, the fuel reservoir chamber (22) can be positioned below the fuel pipe (11, 12) when the cap is attached to the substantially horizontal fuel pipe (11, 12). Accordingly, by removing the fuel in the fuel pipe (11, 12) to the fuel reservoir (22) with the cap attached to the fuel pipe (11, 12), the fuel is removed from the fuel pipe (11, 12) when the cap is removed. Can be prevented from dripping.

第１の特徴および第２の特徴において、燃料溜まり形成部（２３）の弾性変形により燃料溜まり室（２２）の容積が変化するようにできる。   In the first feature and the second feature, the volume of the fuel reservoir chamber (22) can be changed by elastic deformation of the fuel reservoir formation portion (23).

このようにすれば、燃料パイプ（１１、１２）にキャップを装着した状態で燃料溜まり形成部（２３）を弾性変形させて燃料溜まり室（２２）の容積を縮小させることにより、スポイトの原理で燃料パイプ（１１、１２）内の燃料を燃料溜まり室（２２）に吸入することができる。したがって、キャップ取り外し時に燃料パイプ（１１、１２）から燃料が垂れることを確実に防止することができる。   In this manner, the volume of the fuel reservoir chamber (22) is reduced by elastically deforming the fuel reservoir formation portion (23) with the caps attached to the fuel pipes (11, 12), thereby reducing the volume of the fuel reservoir chamber (22). The fuel in the fuel pipes (11, 12) can be sucked into the fuel reservoir chamber (22). Therefore, it is possible to reliably prevent fuel from dripping from the fuel pipes (11, 12) when the cap is removed.

また、筒部（２１）の外周面から突出する取っ手（２５）を備えるようにすれば、取っ手（２５）を利用してキャップを燃料パイプ（１１、１２）から取り外すことにより、キャップ取り外し時に燃料溜まり形成部（２３）が変形することを防止して、キャップ取り外し時に燃料溜まり室（２２）内の燃料がキャップ外に洩れることを防止することができる。   Further, if a handle (25) protruding from the outer peripheral surface of the cylindrical portion (21) is provided, the cap is removed from the fuel pipe (11, 12) using the handle (25), so that the fuel can be removed when the cap is removed. It is possible to prevent the reservoir forming portion (23) from being deformed and prevent the fuel in the fuel reservoir chamber (22) from leaking outside the cap when the cap is removed.

また、筒部（２１）の内部と燃料溜まり室（２２）との間を仕切る仕切り板部（２４）を備え、この仕切り板部（２４）は、自由状態では筒部（２１）の内部と燃料溜まり室（２２）との間を閉じ、燃料パイプ（１１、１２）が挿入された際に燃料パイプ（１１、１２）により変形されて、筒部（２１）の内部と燃料溜まり室（２２）との間を開くようにすることができる。   In addition, a partition plate portion (24) for partitioning the inside of the tube portion (21) and the fuel reservoir chamber (22) is provided, and this partition plate portion (24) is connected to the inside of the tube portion (21) in a free state. The space between the fuel reservoir chamber (22) is closed, and when the fuel pipe (11, 12) is inserted, it is deformed by the fuel pipe (11, 12), and the inside of the cylindrical portion (21) and the fuel reservoir chamber (22) ).

このようにすれば、燃料パイプ（１１、１２）からキャップを取り外すと筒部（２１）の内部と燃料溜まり室（２２）との間が閉じられるため、キャップ取り外し時に燃料溜まり室（２２）内の燃料がキャップ外に洩れることを防止することができる。   In this case, when the cap is removed from the fuel pipes (11, 12), the space between the inside of the cylindrical portion (21) and the fuel reservoir chamber (22) is closed, so that the inside of the fuel reservoir chamber (22) is removed when the cap is removed. It is possible to prevent the fuel from leaking out of the cap.

また、筒部（２１）の内部と燃料溜まり室（２２）との間に絞り部（２６）を備えるようにすれば、キャップ取り外し時に燃料溜まり室（２２）内の燃料がキャップ外に洩れることを防止することができる。   Further, if the throttle portion (26) is provided between the inside of the cylinder portion (21) and the fuel reservoir chamber (22), the fuel in the fuel reservoir chamber (22) leaks out of the cap when the cap is removed. Can be prevented.

また、燃料パイプ（１１、１２）が挿入された際に燃料パイプ（１１、１２）に侵入する侵入部材（２７）を備えるようにすれば、燃料パイプ（１１、１２）内の燃料は侵入部材（２７）により押し出されて燃料溜まり室（２２）に溜められるため、キャップ取り外し時に燃料パイプ（１１、１２）から燃料が垂れることを防止することができる。   In addition, if the intrusion member (27) that enters the fuel pipe (11, 12) when the fuel pipe (11, 12) is inserted is provided, the fuel in the fuel pipe (11, 12) becomes the intrusion member. Since it is pushed out by (27) and stored in the fuel reservoir chamber (22), it is possible to prevent the fuel from dripping from the fuel pipes (11, 12) when the cap is removed.

また、燃料溜まり室（２２）に、吸収した燃料を内部に保持する燃料吸収材（２８）を配置すれば、キャップ取り外し時に燃料溜まり室（２２）内の燃料がキャップ外に洩れることを防止することができる。   Further, if the fuel absorbing material (28) for holding the absorbed fuel is disposed in the fuel reservoir chamber (22), the fuel in the fuel reservoir chamber (22) is prevented from leaking outside the cap when the cap is removed. be able to.

また、燃料溜まり形成部（２３）を蛇腹にすれば、燃料パイプ（１１、１２）内の燃料を燃料溜まり室（２２）に吸入する機能を容易に得ることができる。   Further, if the fuel reservoir forming portion (23) is bellows, the function of sucking the fuel in the fuel pipes (11, 12) into the fuel reservoir chamber (22) can be easily obtained.

なお、特許請求の範囲およびこの欄で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

（第１実施形態）
本発明の第１実施形態について説明する。図１は第１実施形態に係るキャップを装着した燃料供給ポンプを示す図、図２は図１におけるキャップ装着部の拡大断面図である。 (First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a view showing a fuel supply pump equipped with a cap according to the first embodiment, and FIG. 2 is an enlarged cross-sectional view of a cap attaching portion in FIG.

ディーゼルエンジン（図示せず）における燃料噴射装置は、高圧燃料が蓄えられる蓄圧器（図示せず）を備えている。図１に示す燃料供給ポンプ１は、低圧ポンプ（図示せず）により燃料タンク（図示せず）から燃料を吸入し、吸入した燃料を高圧ポンプ（図示せず）により加圧して蓄圧器に供給するものであり、外部燃料配管（図示せず）と接続される前の時点で内部に燃料が充填されている。   A fuel injection device in a diesel engine (not shown) includes a pressure accumulator (not shown) in which high-pressure fuel is stored. A fuel supply pump 1 shown in FIG. 1 sucks fuel from a fuel tank (not shown) by a low-pressure pump (not shown), pressurizes the sucked fuel by a high-pressure pump (not shown), and supplies it to the accumulator. The fuel is filled inside at a point before being connected to an external fuel pipe (not shown).

燃料供給ポンプ１は、低圧ポンプの吸入側に連通する円筒状の入口燃料パイプ１１と、リーク燃料の排出口となる円筒状の出口燃料パイプ１２とを備えている。両燃料パイプ１１、１２は、外部燃料配管を介して燃料タンクに接続される。   The fuel supply pump 1 includes a cylindrical inlet fuel pipe 11 that communicates with the suction side of the low-pressure pump, and a cylindrical outlet fuel pipe 12 that serves as a discharge port for leaked fuel. Both fuel pipes 11 and 12 are connected to a fuel tank via an external fuel pipe.

なお、図１、図２はそれらの燃料パイプ１１、１２が外部燃料配管に接続される前の状態を示しており、この時点では、燃料パイプ１１、１２からの燃料洩れおよび燃料パイプ１１、１２内への異物侵入を防止するキャップ２が各燃料パイプ１１、１２の開口端部側に装着されている。   FIGS. 1 and 2 show a state before the fuel pipes 11 and 12 are connected to the external fuel pipe. At this time, fuel leakage from the fuel pipes 11 and 12 and the fuel pipes 11 and 12 are shown. A cap 2 that prevents foreign matter from entering the inside of the fuel pipes 11 and 12 is attached to the opening end side.

キャップ２は、燃料パイプ１１、１２が挿入される円筒状の筒部２１と、この筒部２１の内部と連通する燃料溜まり室２２を区画形成する燃料溜まり形成部２３を備えている。筒部２１の軸方向に沿ってキャップ２を見たときに、燃料溜まり室２２は、筒部２１の内周面および燃料パイプ１１、１２の外周面よりも外側に位置している。そして、キャップ２は、燃料溜まり室２２が燃料パイプ１１、１２よりも下方に位置するようにして燃料パイプ１１、１２に装着される。   The cap 2 includes a cylindrical cylindrical portion 21 into which the fuel pipes 11 and 12 are inserted, and a fuel reservoir forming portion 23 that defines and forms a fuel reservoir chamber 22 that communicates with the inside of the cylindrical portion 21. When the cap 2 is viewed along the axial direction of the cylindrical portion 21, the fuel reservoir chamber 22 is located outside the inner peripheral surface of the cylindrical portion 21 and the outer peripheral surfaces of the fuel pipes 11 and 12. The cap 2 is attached to the fuel pipes 11 and 12 such that the fuel reservoir chamber 22 is positioned below the fuel pipes 11 and 12.

キャップ２は、ゴムや樹脂等の弾性を有する材料にて形成されており、したがって燃料溜まり形成部２３は弾性変形可能であり、燃料溜まり形成部２３の弾性変形により燃料溜まり室２２の容積が変化するようになっている。   The cap 2 is formed of an elastic material such as rubber or resin. Therefore, the fuel reservoir forming portion 23 can be elastically deformed, and the volume of the fuel reservoir chamber 22 changes due to the elastic deformation of the fuel reservoir forming portion 23. It is supposed to do.

筒部２１の内部と燃料溜まり室２２との間は、薄板状の仕切り板部２４により仕切られている。この仕切り板部２４は、弾性変形可能であり、自由状態では筒部２１の内部と燃料溜まり室２２との間を閉じ、燃料パイプ１１、１２が挿入された際に燃料パイプ１１、１２により変形されて、筒部２１の内部と燃料溜まり室２２との間を開くようになっている。   The inside of the cylinder portion 21 and the fuel reservoir chamber 22 are partitioned by a thin partition plate portion 24. The partition plate portion 24 can be elastically deformed. In a free state, the partition plate portion 24 is closed between the inside of the cylinder portion 21 and the fuel reservoir chamber 22 and deformed by the fuel pipes 11 and 12 when the fuel pipes 11 and 12 are inserted. Thus, the interior of the cylinder portion 21 and the fuel reservoir chamber 22 are opened.

筒部２１の外周面には、その外周面から突出する取っ手２５を備えている。この取っ手２５を利用することにより、キャップ２を燃料パイプ１１、１２から容易に取り外すことができる。   A handle 25 protruding from the outer peripheral surface is provided on the outer peripheral surface of the cylindrical portion 21. By using this handle 25, the cap 2 can be easily removed from the fuel pipes 11 and 12.

上記構成になるキャップ２は、以下のようにして用いる。まず、燃料パイプ１１、１２にキャップ２を装着する。これにより、燃料パイプ１１、１２からの燃料洩れおよび燃料パイプ１１、１２内への異物侵入が防止される。   The cap 2 having the above configuration is used as follows. First, the cap 2 is attached to the fuel pipes 11 and 12. Thereby, fuel leakage from the fuel pipes 11 and 12 and foreign matter intrusion into the fuel pipes 11 and 12 are prevented.

燃料パイプ１１、１２にキャップ２を装着すると、図２に示すように、燃料パイプ１１、１２により仕切り板部２４が変形されて、筒部２１の内部と燃料溜まり室２２との間が連通する。この状態で燃料溜まり形成部２３を弾性変形させて燃料溜まり室２２の容積を縮小させることにより、スポイトの原理で燃料パイプ１１、１２内の燃料を燃料溜まり室２２に吸入する。このように、燃料パイプ１１、１２内の燃料を吸い出しておくことにより、キャップ２の取り外し時に燃料パイプ１１、１２から燃料が垂れることを防止することができる。   When the cap 2 is attached to the fuel pipes 11 and 12, as shown in FIG. 2, the partition plate portion 24 is deformed by the fuel pipes 11 and 12, and the inside of the cylinder portion 21 and the fuel reservoir chamber 22 communicate with each other. . In this state, the fuel reservoir forming portion 23 is elastically deformed to reduce the volume of the fuel reservoir chamber 22, whereby the fuel in the fuel pipes 11 and 12 is sucked into the fuel reservoir chamber 22 on the basis of the dropper principle. Thus, by sucking out the fuel in the fuel pipes 11 and 12, it is possible to prevent the fuel from dripping from the fuel pipes 11 and 12 when the cap 2 is removed.

また、取っ手２５を利用してキャップ２を燃料パイプ１１、１２から取り外すことにより、キャップ２取り外し時に燃料溜まり形成部２３が変形することを防止して、キャップ２取り外し時に燃料溜まり室２２内の燃料がキャップ２外に洩れることを確実に防止することができる。   Further, by removing the cap 2 from the fuel pipes 11 and 12 using the handle 25, the fuel reservoir forming portion 23 is prevented from being deformed when the cap 2 is removed, and the fuel in the fuel reservoir chamber 22 is removed when the cap 2 is removed. Can be reliably prevented from leaking out of the cap 2.

さらに、燃料パイプ１１、１２からキャップ２を取り外すと、仕切り板部２４が復元力により元の状態に復帰して筒部２１の内部と燃料溜まり室２２との間を遮断するため、キャップ２取り外し時に燃料溜まり室２２内の燃料がキャップ２外に洩れることを確実に防止することができる。   Further, when the cap 2 is removed from the fuel pipes 11 and 12, the partition plate portion 24 is restored to its original state by the restoring force, and the space between the inside of the cylinder portion 21 and the fuel reservoir chamber 22 is blocked. It is possible to reliably prevent the fuel in the fuel reservoir chamber 22 from leaking out of the cap 2 sometimes.

（第２実施形態）
本発明の第２実施形態について説明する。図３は第２実施形態に係るキャップの断面図である。本実施形態は、第１実施形態における仕切り板部２４を廃止し、絞り部２６を設けている。なお、第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Second Embodiment)
A second embodiment of the present invention will be described. FIG. 3 is a cross-sectional view of a cap according to the second embodiment. In the present embodiment, the partition plate portion 24 in the first embodiment is eliminated, and a throttle portion 26 is provided. In addition, the same code | symbol is attached | subjected to the same or equivalent part as 1st Embodiment, and the description is abbreviate | omitted.

図３に示すように、筒部２１の内部と燃料溜まり室２２との間は、筒部２１の内部や燃料溜まり室２２よりも通路面積が小さい絞り部２６にて連通されている。この絞り部２６により、キャップ２取り外し時に燃料溜まり室２２内の燃料が筒部２１側に流れにくくなっている。   As shown in FIG. 3, the inside of the cylinder portion 21 and the fuel reservoir chamber 22 are communicated with each other by a throttle portion 26 having a smaller passage area than the inside of the cylinder portion 21 and the fuel reservoir chamber 22. This throttle portion 26 makes it difficult for the fuel in the fuel reservoir chamber 22 to flow toward the cylinder portion 21 when the cap 2 is removed.

（第３実施形態）
本発明の第３実施形態について説明する。図４は第３実施形態に係るキャップの断面図である。本実施形態は、第１実施形態における仕切り板部２４および取っ手２５を廃止し、侵入部材２７および燃料吸収材２８を設けている。なお、第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Third embodiment)
A third embodiment of the present invention will be described. FIG. 4 is a cross-sectional view of a cap according to the third embodiment. In the present embodiment, the partition plate portion 24 and the handle 25 in the first embodiment are eliminated, and the intrusion member 27 and the fuel absorbing material 28 are provided. In addition, the same code | symbol is attached | subjected to the same or equivalent part as 1st Embodiment, and the description is abbreviate | omitted.

図４に示すように、キャップ２は、筒部２１の内部に配置されて、筒部２１の底部（閉塞端）から筒部２１の開口端側に向かって筒部２１の軸方向に沿って延びる棒状の侵入部材２７が形成されている。また、燃料溜まり室２２には、吸収した燃料を凝固させて内部に保持する燃料吸収材２８が配置されている。   As shown in FIG. 4, the cap 2 is disposed inside the cylindrical portion 21, and extends along the axial direction of the cylindrical portion 21 from the bottom (closed end) of the cylindrical portion 21 toward the opening end side of the cylindrical portion 21. An extending rod-shaped intrusion member 27 is formed. Further, a fuel absorbing material 28 that solidifies the absorbed fuel and holds it inside is disposed in the fuel reservoir chamber 22.

本実施形態では、燃料パイプ１１、１２にキャップ２を装着すると、図４に示すように燃料パイプ１１、１２内に侵入部材２７が侵入し、燃料パイプ１１、１２内の燃料が侵入部材２７により押し出されて燃料溜まり室２２に流出するため、キャップ２取り外し時に燃料パイプ１１、１２から燃料が垂れることを確実に防止することができる。   In the present embodiment, when the cap 2 is attached to the fuel pipes 11 and 12, the intrusion member 27 enters the fuel pipes 11 and 12 as shown in FIG. 4, and the fuel in the fuel pipes 11 and 12 is absorbed by the intrusion member 27. Since it is pushed out and flows out into the fuel reservoir chamber 22, it is possible to reliably prevent the fuel from dripping from the fuel pipes 11 and 12 when the cap 2 is removed.

また、燃料溜まり室２２に流出した燃料は燃料吸収材２８に保持されるため、キャップ２取り外し時に燃料溜まり室２２側から燃料がキャップ２外に洩れることを確実に防止することができる。   Further, since the fuel that has flowed into the fuel reservoir chamber 22 is held by the fuel absorber 28, it is possible to reliably prevent the fuel from leaking out of the cap 2 from the fuel reservoir chamber 22 side when the cap 2 is removed.

（第４実施形態）
本発明の第４実施形態について説明する。図５は第４実施形態に係るキャップの断面図である。なお、第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Fourth embodiment)
A fourth embodiment of the present invention will be described. FIG. 5 is a cross-sectional view of a cap according to the fourth embodiment. In addition, the same code | symbol is attached | subjected to the same or equivalent part as 1st Embodiment, and the description is abbreviate | omitted.

本実施形態は、図５に示すように、燃料溜まり形成部２３を蛇腹にしている。燃料溜まり形成部２３は、筒部２１と同軸に配置されている。また、燃料溜まり形成部２３の最大内径は、筒部２１の内径および燃料パイプ１１、１２の外径よりも大きくなっている。したがって、筒部２１の軸方向に沿ってキャップ２を見たときに、燃料溜まり室２２の一部は、筒部２１の内周面および燃料パイプ１１、１２の外周面よりも外側に位置している。このため、略水平状態の燃料パイプ１１、１２にキャップ２を装着すると、燃料溜まり室２２の一部は筒部２１の内周面および燃料パイプ１１、１２の外周面よりも下方に位置することになる。   In the present embodiment, as shown in FIG. 5, the fuel reservoir forming portion 23 is bellows. The fuel reservoir forming part 23 is arranged coaxially with the cylinder part 21. Further, the maximum inner diameter of the fuel pool forming portion 23 is larger than the inner diameter of the cylinder portion 21 and the outer diameters of the fuel pipes 11 and 12. Therefore, when the cap 2 is viewed along the axial direction of the cylindrical portion 21, a part of the fuel reservoir chamber 22 is located outside the inner peripheral surface of the cylindrical portion 21 and the outer peripheral surfaces of the fuel pipes 11 and 12. ing. For this reason, when the cap 2 is attached to the fuel pipes 11 and 12 in a substantially horizontal state, a part of the fuel reservoir chamber 22 is positioned below the inner peripheral surface of the cylindrical portion 21 and the outer peripheral surfaces of the fuel pipes 11 and 12. become.

本実施形態では、燃料溜まり形成部２３を蛇腹にしているため、燃料パイプ１１、１２内の燃料を燃料溜まり室２２に容易に吸入することができる。   In the present embodiment, since the fuel reservoir forming portion 23 is bellows, the fuel in the fuel pipes 11 and 12 can be easily sucked into the fuel reservoir chamber 22.

（他の実施形態）
上記各実施形態では、ディーゼルエンジン用燃料噴射装置の燃料供給ポンプ１に本発明のキャップ２を適用したが、本発明のキャップ２は、燃料パイプを備える機器に適用することができる。 (Other embodiments)
In each said embodiment, although the cap 2 of this invention was applied to the fuel supply pump 1 of the fuel-injection apparatus for diesel engines, the cap 2 of this invention can be applied to the apparatus provided with a fuel pipe.

本発明の第１実施形態に係るキャップを装着した燃料供給ポンプを示す図である。It is a figure which shows the fuel supply pump equipped with the cap which concerns on 1st Embodiment of this invention. 図１におけるキャップ装着部の拡大断面図である。It is an expanded sectional view of the cap mounting part in FIG. 本発明の第２実施形態に係るキャップの断面図である。It is sectional drawing of the cap which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係るキャップの断面図である。It is sectional drawing of the cap which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係るキャップの断面図である。It is sectional drawing of the cap which concerns on 4th Embodiment of this invention.

符号の説明Explanation of symbols

１…燃料供給ポンプ（機器）、１１、１２…燃料パイプ、２１…筒部、２２…燃料溜まり室、２３…燃料溜まり形成部。   DESCRIPTION OF SYMBOLS 1 ... Fuel supply pump (apparatus), 11, 12 ... Fuel pipe, 21 ... Tube part, 22 ... Fuel reservoir chamber, 23 ... Fuel reservoir formation part.

Claims (9)

燃料の取り入れ口および取り出し口となる燃料パイプ（１１、１２）を備える機器（１）に装着されるキャップであって、
前記燃料パイプ（１１、１２）が挿入される筒部（２１）と、この筒部（２１）の内部と連通する燃料溜まり室（２２）を区画形成する燃料溜まり形成部（２３）とを備え、
前記燃料溜まり室（２２）が前記燃料パイプ（１１、１２）よりも下方に位置するようにして前記燃料パイプ（１１、１２）に装着可能であることを特徴とするキャップ。 A cap attached to a device (1) provided with fuel pipes (11, 12) serving as a fuel intake port and a fuel discharge port,
A cylinder part (21) into which the fuel pipe (11, 12) is inserted, and a fuel reservoir forming part (23) for defining a fuel reservoir chamber (22) communicating with the inside of the cylinder part (21). ,
The cap characterized in that it can be attached to the fuel pipe (11, 12) so that the fuel reservoir (22) is positioned below the fuel pipe (11, 12). 燃料の取り入れ口および取り出し口となる燃料パイプ（１１、１２）を備える機器（１）に装着されるキャップであって、
前記燃料パイプ（１１、１２）が挿入される筒部（２１）と、この筒部（２１）の内部と連通する燃料溜まり室（２２）を区画形成する燃料溜まり形成部（２３）とを備え、
前記筒部（２１）の軸方向に沿って見たときに、前記燃料溜まり室（２２）は前記筒部（２１）の内周面よりも外側に位置することを特徴とするキャップ。 A cap attached to a device (1) provided with fuel pipes (11, 12) serving as a fuel intake port and a fuel discharge port,
A cylinder part (21) into which the fuel pipe (11, 12) is inserted, and a fuel reservoir forming part (23) for defining a fuel reservoir chamber (22) communicating with the inside of the cylinder part (21). ,
The cap, wherein the fuel reservoir chamber (22) is located outside the inner peripheral surface of the cylindrical portion (21) when viewed along the axial direction of the cylindrical portion (21). 前記燃料溜まり形成部（２３）は弾性変形可能に構成され、前記燃料溜まり形成部（２３）の弾性変形により前記燃料溜まり室（２２）の容積が変化することを特徴とする請求項１または２に記載のキャップ。 The said fuel reservoir formation part (23) is comprised so that elastic deformation is possible, The volume of the said fuel reservoir chamber (22) changes with elastic deformation of the said fuel reservoir formation part (23), Cap as described in. 前記筒部（２１）の外周面から突出する取っ手（２５）を備えることを特徴とする請求項１ないし３のいずれか１つに記載のキャップ。 The cap according to any one of claims 1 to 3, further comprising a handle (25) protruding from an outer peripheral surface of the cylindrical portion (21). 前記筒部（２１）の内部と前記燃料溜まり室（２２）との間を仕切る仕切り板部（２４）を備え、
この仕切り板部（２４）は、弾性変形可能で且つ前記筒部（２１）の内部と前記燃料溜まり室（２２）との間を開閉可能に構成され、自由状態では前記筒部（２１）の内部と前記燃料溜まり室（２２）との間を閉じ、前記燃料パイプ（１１、１２）が挿入された際に前記燃料パイプ（１１、１２）により変形されて、前記筒部（２１）の内部と前記燃料溜まり室（２２）との間を開くことを特徴とする請求項１ないし４のいずれか１つに記載のキャップ。 A partition plate portion (24) for partitioning the inside of the cylindrical portion (21) and the fuel reservoir chamber (22);
The partition plate portion (24) is configured to be elastically deformable and to be able to open and close between the inside of the tube portion (21) and the fuel reservoir chamber (22), and in a free state, the partition portion (24) of the tube portion (21). The inside of the cylinder part (21) is deformed by the fuel pipe (11, 12) when the fuel pipe (11, 12) is inserted by closing the space between the inside and the fuel reservoir chamber (22). The cap according to any one of claims 1 to 4, wherein a gap is opened between the fuel reservoir and the fuel reservoir chamber (22). 前記筒部（２１）の内部と前記燃料溜まり室（２２）との間に絞り部（２６）を備えることを特徴とする請求項１ないし４のいずれか１つに記載のキャップ。 The cap according to any one of claims 1 to 4, further comprising a throttle portion (26) between the inside of the cylindrical portion (21) and the fuel reservoir chamber (22). 前記燃料パイプ（１１、１２）が挿入された際に前記燃料パイプ（１１、１２）に侵入する侵入部材（２７）を備えることを特徴とする請求項１ないし６のいずれか１つに記載のキャップ。 The intrusion member (27) that intrudes into the fuel pipe (11, 12) when the fuel pipe (11, 12) is inserted, according to any one of claims 1 to 6, cap. 前記燃料溜まり室（２２）に、吸収した燃料を内部に保持する燃料吸収材（２８）が配置されていることを特徴とする請求項１ないし７のいずれか１つに記載のキャップ。 The cap according to any one of claims 1 to 7, wherein a fuel absorbing material (28) for holding the absorbed fuel therein is disposed in the fuel reservoir chamber (22). 前記燃料溜まり形成部（２３）は蛇腹であることを特徴とする請求項３に記載のキャップ。 The cap according to claim 3, wherein the fuel reservoir forming portion is a bellows.
JP2007066668A 2007-03-15 2007-03-15 cap Expired - Fee Related JP4535078B2 (en)

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JPS5517738A (en) * 1978-07-24 1980-02-07 Mitsubishi Heavy Ind Ltd Corrugated cap for pipes
JPH0476962U (en) * 1990-11-15 1992-07-06
JPH0861082A (en) * 1994-08-26 1996-03-05 Nippondenso Co Ltd Dustproof cap
JP2006292081A (en) * 2005-04-11 2006-10-26 Jtekt Corp Cap for pipe

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