JP2015140730A - Grounding device of fuel tank - Google Patents

Grounding device of fuel tank Download PDF

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Publication number
JP2015140730A
JP2015140730A JP2014014279A JP2014014279A JP2015140730A JP 2015140730 A JP2015140730 A JP 2015140730A JP 2014014279 A JP2014014279 A JP 2014014279A JP 2014014279 A JP2014014279 A JP 2014014279A JP 2015140730 A JP2015140730 A JP 2015140730A
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Prior art keywords
fuel tank
fuel
conductor
grounding device
level gauge
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JP2014014279A
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JP6080780B2 (en
Inventor
利崇 小宮
Toshitaka Komiya
利崇 小宮
芳明 蔵屋
Yoshiaki Kuraya
芳明 蔵屋
昌太郎 岡本
Shotaro Okamoto
昌太郎 岡本
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Yanmar Co Ltd
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Yanmar Co Ltd
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Priority to JP2014014279A priority Critical patent/JP6080780B2/en
Priority to PCT/JP2015/051137 priority patent/WO2015115215A1/en
Publication of JP2015140730A publication Critical patent/JP2015140730A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0082—Devices inside the fuel tank other than fuel pumps or filters
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • B60K2015/03217—Fuel level sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03328—Arrangements or special measures related to fuel tanks or fuel handling
    • B60K2015/03401—Arrangements or special measures related to fuel tanks or fuel handling for preventing electrostatic charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/20—Off-Road Vehicles
    • B60Y2200/22—Agricultural vehicles
    • B60Y2200/221—Tractors

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a grounding device capable of grounding to a liquid level of fuel positioned within a range between a bottom face to a top face of a fuel tank, and being easily installed with a simple structure.SOLUTION: In a grounding device for discharging static electricity generated on a fuel in a fuel tank 20, the grounding device 23 and a fuel level gauge 22 are disposed side by side on a top face 20a of the fuel tank 20. The grounding device 23 comprises an electrode portion 24 including an earth terminal 29 and disposed on the top face 20a of the fuel tank 20, and a conductor 25 of which an upper portion is oscillatably locked to the electrode portion 24, and of which a lower portion is extended to a bottom portion in the fuel tank 20. The grounding device 23 is arranged so that the oscillating direction of the conductor 25 and the oscillating direction of a float 22d of the fuel level gauge 22 are in parallel with each other.

Description

本発明は、燃料タンク内の燃料に発生する静電気を放電する燃料タンクのアース装置に関する。   The present invention relates to a fuel tank grounding device for discharging static electricity generated in fuel in a fuel tank.

ガソリンや軽油等の燃料は、電気を通しにくいため、静電気を蓄積しやすい。また、燃料タンク内の燃料は、タンク内壁との摩擦によって静電気を発生・蓄積し易くなっている。静電気を蓄積した状態で給油すると、放電して引火の可能性があるため、従来から燃料タンクには放電手段が設けられていた。   Fuels such as gasoline and light oil tend to accumulate static electricity because they are difficult to conduct electricity. The fuel in the fuel tank is likely to generate and accumulate static electricity due to friction with the inner wall of the tank. If fuel is supplied with static electricity accumulated, there is a possibility of electric discharge and ignition, and thus a fuel tank has conventionally been provided with discharge means.

例えば、燃料タンクの上板面に開口部を設け、該開口部をアッパープレートで閉じ、該アッパープレートに燃料ポンプと導電端子を設けて、燃料ポンプに設けられているアース端子と導電端子を接続する構成が公知となっている（特許文献１参照）。この構成では、燃料ポンプからアースをとるため、燃料が少なくなって傾斜したときや燃料ポンプよりも液面が低くなると、アースができなくなるという問題があった。   For example, an opening is provided on the upper plate surface of the fuel tank, the opening is closed with an upper plate, a fuel pump and a conductive terminal are provided on the upper plate, and a ground terminal and a conductive terminal provided on the fuel pump are connected. The structure to perform is known (see Patent Document 1). In this configuration, since the fuel pump is grounded, there is a problem that the grounding cannot be performed when the fuel is inclined and the liquid level is lower than that of the fuel pump.

また、燃料タンク内の上部と底部に磁石を配置し、上下の磁石の間に静電気防止部材を配置する技術も公知となっている（特許文献２参照）。しかし、磁石を燃料タンク内の所望の位置に配置することは構造上難しく、適切に配置しないと静電気防止部材とレベルゲージや燃料ポンプと干渉するおそれがあった。   In addition, a technique in which magnets are arranged at the top and bottom in the fuel tank and an antistatic member is arranged between the upper and lower magnets is also known (see Patent Document 2). However, it is structurally difficult to arrange the magnet at a desired position in the fuel tank, and there is a risk of interference with the antistatic member, the level gauge, and the fuel pump if not arranged properly.

特開２００１−２７１７１８号公報JP 2001-271718 A 登録実用新案第３１５５０２０号公報Registered Utility Model No. 3155020

本発明は、燃料タンクの底面から上面までの間の範囲に位置する燃料の液面に対してアースすることが可能で、簡単な構造で容易に設置できるアース装置を提供することを目的としている。   It is an object of the present invention to provide a grounding device that can be grounded with respect to the liquid level of the fuel located in the range from the bottom surface to the top surface of the fuel tank and can be easily installed with a simple structure. .

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。
即ち、請求項１においては、燃料タンク内の燃料に生じる静電気を放電するアース装置であって、燃料タンク上面にアース装置と燃料レベルゲージが併置して配置され、アース装置は、アース端子を備えて燃料タンク上面に取り付けられる電極部と、上部が前記電極部に揺動自在に係止され、下部が燃料タンク内の底部に延設される導電体とからなり、前記導電体の揺動方向と燃料レベルゲージのフロートの揺動方向が平行となるように配置したものである。 The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
That is, according to the first aspect of the present invention, there is provided a grounding device for discharging static electricity generated in the fuel in the fuel tank, wherein the grounding device and the fuel level gauge are arranged in parallel on the upper surface of the fuel tank, and the grounding device includes a grounding terminal. The electrode portion is attached to the upper surface of the fuel tank, and the upper portion is swingably locked to the electrode portion, and the lower portion is extended to the bottom portion of the fuel tank, and the swing direction of the conductor is And the fuel level gauge float are arranged so that the rocking directions of the floats are parallel to each other.

請求項２においては、前記電極部には前記導電体の揺動を規制する規制部が配置されるものである。   According to a second aspect of the present invention, the electrode portion is provided with a restricting portion that restricts swinging of the conductor.

請求項３においては、前記電極部はロッドにより構成され、先端が略Ｕ字状に折り曲げ形成されるものである。   According to a third aspect of the present invention, the electrode portion is composed of a rod, and the tip is bent into a substantially U shape.

本発明の効果として、以下に示すような効果を奏する。
アース装置は簡単な構成で容易に取り付けることができ、燃料ゲージと干渉することなく配置でき、燃料タンクが傾斜しても導電体の先端は燃料タンクの底部に位置し、燃料が少なくなってもアースすることができる。 As effects of the present invention, the following effects can be obtained.
The earthing device can be easily installed with a simple structure, can be arranged without interfering with the fuel gauge, and even if the fuel tank is inclined, the conductor tip is located at the bottom of the fuel tank, so that even if the fuel is low Can be grounded.

本発明の実施形態に係るアース装置を備える燃料タンクを装備したトラクタの全体側面図。The whole side view of the tractor equipped with the fuel tank provided with the earthing device concerning the embodiment of the present invention. 燃料タンクの正面断面図。Front sectional drawing of a fuel tank. 燃料タンクの平面図。The top view of a fuel tank. 燃料タンクの側面断面図。Side surface sectional drawing of a fuel tank. アース装置の側面図。The side view of a grounding apparatus. アース装置の底面図。The bottom view of a grounding device. 電極部の拡大断面図。The expanded sectional view of an electrode part. アース装置の他の実施形態の断面図。Sectional drawing of other embodiment of an earthing | grounding apparatus.

まず、図１より、本発明の一実施形態としての燃料タンク２０のアース装置２３を備えるトラクタ１の全体構造について説明する。なお、Ｆ方向を前方として、前後方向を規定して説明する。   First, the overall structure of the tractor 1 including the grounding device 23 of the fuel tank 20 as one embodiment of the present invention will be described with reference to FIG. In the description, the front-rear direction is defined with the F direction as the front.

トラクタ１は、エンジンフレーム１１の上にはエンジン３が搭載されて、ボンネット２で覆われている。前記エンジンフレーム１１の前下部には、フロントアクスルケース７が左右揺動自在に配設され、該フロントアクスルケース７に軸支された前車軸の両端には、前輪９・９が軸支されている。一方、前記エンジンフレーム１１の後方には、クラッチハウジングを介してミッションケース６が配設され、該ミッションケース６の後部両側には、リヤアクスルケース８・８が固設され、該リヤアクスルケース８・８に軸支された後車軸の両端部には、後輪１０・１０が軸支されている。   The tractor 1 has an engine 3 mounted on an engine frame 11 and is covered with a bonnet 2. A front axle case 7 is disposed at the front lower part of the engine frame 11 so as to be able to swing left and right, and front wheels 9 and 9 are pivotally supported at both ends of a front axle pivotally supported by the front axle case 7. Yes. On the other hand, a transmission case 6 is disposed behind the engine frame 11 via a clutch housing, and rear axle cases 8 and 8 are fixed on both sides of the rear of the transmission case 6, and the rear axle cases 8 and 8 are fixed. Rear wheels 10 and 10 are pivotally supported at both ends of the rear axle that is pivotally supported by the rear axle.

前記ミッションケース６の後面からはＰＴＯ軸（図示せず）が後方に突出され、ミッションケース６の後部から図示しない作業機装着装置を介してロータリ耕耘装置等の作業機を装着可能としている。   A PTO shaft (not shown) protrudes rearward from the rear surface of the mission case 6, and a work implement such as a rotary tillage device can be attached from the rear portion of the mission case 6 via a work implement attachment device (not shown).

前記ボンネット２の後部にはダッシュボード１２を設けて、該ダッシュボード１２上にステアリングハンドル１３を配置している。該ステアリングハンドル１３の後方のミッションケース６上には座席シート１４が配置されている。該座席シート１４の左右両側には後輪１０・１０の上方を覆うフェンダー１５・１５が配置される。   A dashboard 12 is provided at the rear of the bonnet 2, and a steering handle 13 is disposed on the dashboard 12. A seat seat 14 is disposed on the transmission case 6 behind the steering handle 13. Fenders 15 and 15 that cover the upper portions of the rear wheels 10 and 10 are arranged on the left and right sides of the seat 14.

前記ボンネット２の後部内、及び、ダッシュボード１２の前部内に跨って燃料タンク２０が配置されて、燃料タンク２０の上部に設けられる給油口２１がボンネット２の後部上面より突出している。但し、燃料タンク２０の配置位置は限定するものではなく、ステップ下方等に配置することも可能である。   A fuel tank 20 is arranged in the rear part of the bonnet 2 and in the front part of the dashboard 12, and a fuel filler port 21 provided at the upper part of the fuel tank 20 protrudes from the upper surface of the rear part of the bonnet 2. However, the arrangement position of the fuel tank 20 is not limited, and may be arranged below the step.

図２、図３に示すように、燃料タンク２０の上面２０ａに給油口２１と燃料レベルゲージ２２とアース装置２３が併置して配置されている。給油口２１は筒状に構成して上面２０ａの最上部から上方に突出し、給油口２１はキャップ３０により閉じられている。   As shown in FIGS. 2 and 3, a fuel filler port 21, a fuel level gauge 22, and a grounding device 23 are arranged side by side on the upper surface 20 a of the fuel tank 20. The oil filler 21 is formed in a cylindrical shape and protrudes upward from the uppermost portion of the upper surface 20 a, and the oil filler 21 is closed by a cap 30.

燃料レベルゲージ２２は、給油口２１の側方に開口部２０ｂを設けて、タンク内部に挿入して取り付けられる。燃料レベルゲージ２２は、取付部２２ａとセンサ２２ｂとアーム２２ｃとフロート２２ｄからなり、取付部２２ａは円板状のプレートからなり、外周部に複数のボルト孔を開口し、前記開口部２０ｂ周囲から上方に突出した取付ボルトにボルト孔部分を嵌合させてナットで固定している。   The fuel level gauge 22 is provided with an opening 20b on the side of the fuel filler opening 21 and inserted into the tank. The fuel level gauge 22 includes a mounting portion 22a, a sensor 22b, an arm 22c, and a float 22d. The mounting portion 22a includes a disk-shaped plate, and a plurality of bolt holes are formed in an outer peripheral portion, and from the periphery of the opening portion 20b. A bolt hole portion is fitted to the mounting bolt protruding upward and fixed with a nut.

センサ２２ｂは、取付部２２ａの下面に取り付けられ、前記ダッシュボード１２に設けた表示装置と配線を介して電気的に接続される。センサ２２ｂは側部から揺動可能に突出したアーム２２ｃの回動角度を検出し、ダッシュボード１２に設けた表示装置に回動角度に応じた燃料レベル（燃料の残量）を表示できるようにしている。   The sensor 22b is attached to the lower surface of the attachment portion 22a, and is electrically connected to the display device provided on the dashboard 12 via wiring. The sensor 22b detects the rotation angle of the arm 22c protruding so as to swing from the side, and can display the fuel level (remaining amount of fuel) corresponding to the rotation angle on the display device provided on the dashboard 12. ing.

アーム２２ｃは、センサ２２ｂとフロート２２ｄを連結するものであり、センサ２２ｂから燃料タンク２０内下方に揺動可能に延設される。   The arm 22c connects the sensor 22b and the float 22d, and extends from the sensor 22b so as to be swingable downward in the fuel tank 20.

フロート２２ｄは、アーム２２ｃの先端に固定され、燃料の液面上に浮く構成としている。そして、フロート２２ｄが満タン位置から燃料タンク２０の底部まで昇降移動できるように、前記アーム２２ｃの長さが設定されている。   The float 22d is fixed to the tip of the arm 22c and floats on the fuel level. The length of the arm 22c is set so that the float 22d can move up and down from the full tank position to the bottom of the fuel tank 20.

アース装置２３は、給油口２１のおよびレベルゲージ２２の側方に開口部２０ｃを設けて、タンク内部に挿入して取り付けられる。アース装置２３は図２乃至図７に示すように、金属製の電極部２４と導電体２５からなる。   The grounding device 23 is provided with an opening 20c at the side of the fuel filler 21 and the side of the level gauge 22, and is inserted and attached to the inside of the tank. As shown in FIGS. 2 to 7, the ground device 23 includes a metal electrode portion 24 and a conductor 25.

電極部２４は、取付部２４ａと係止板２４ｂからなり、取付部２４ａは円板で構成し、外周部に複数（本実施形態では３ヶ所）のボルト孔２４ｃ・２４ｃ・２４ｃを開口し、前記開口部２０ｃ周囲から上方に突出した取付ボルト２６・２６・２６にボルト孔２４ｃ・２４ｃ・２４ｃを嵌合させてナット２７・２７・２７で固定している。なお、ボルト孔２４ｃ・２４ｃ・２４ｃと取付ボルト２６・２６・２６は取付位置の位置決めの役目を果たしており、その数を奇数とすることにより、取付方向の間違いを防止して、導電体２５とアース装置２３の揺動方向が同方向となるように取り付けられる。   The electrode portion 24 includes a mounting portion 24a and a locking plate 24b. The mounting portion 24a is formed of a disk, and a plurality of (three in this embodiment) bolt holes 24c, 24c, and 24c are opened on the outer peripheral portion. Bolt holes 24c, 24c, and 24c are fitted to mounting bolts 26, 26, and 26 that protrude upward from the periphery of the opening 20c, and are fixed by nuts 27, 27, and 27. The bolt holes 24c, 24c, and 24c and the mounting bolts 26, 26, and 26 serve to position the mounting positions. By making the number an odd number, an error in the mounting direction can be prevented, and the conductor 25 and The grounding device 23 is attached so that the swinging direction is the same.

つまり、図７に示すように、燃料タンク２０は合成樹脂でブロー成形または射出成型等で構成され、成形する時に、開口部２０ｂの周囲に取付ボルト２６・２６・２６と取付金具３１をインサート成形する。なお、開口部２０ｂは同時に形成することも後で開口することもできる。そして、前記取付ボルト２６・２６・２６とボルト孔２４ｃ・２４ｃ・２４ｃを一致させて、開口部２０ｂにシール２８を介して電極部２４を載置して蓋し、ナット２７・２７・２７により締め付け固定する。こうして、燃料が漏れることなくアース装置２３を取り付けることができる。そして、前記取付ボルト２６・２６・２６の何れか一つを端子取付部とし、アース線の一端に設けたアース端子２９をナット２７により共締め固定する。但し、燃料レベルゲージ２２を取り付ける開口部２０ｂと、アース装置２３を取り付ける開口部２０ｃを同じ大きさとし、両者の取付ボルトを開口部２０ｂ・２０ｃの外周の同じ位置に配置することで、燃料レベルゲージ２２とアース装置２３の取付構成の共通化を図ることができて、部品点数を削減し、コスト低減化を図ることもできる。   That is, as shown in FIG. 7, the fuel tank 20 is made of a synthetic resin by blow molding or injection molding, and when molding, the mounting bolts 26, 26 and 26 and the mounting bracket 31 are insert-molded around the opening 20b. To do. The opening 20b can be formed at the same time or can be opened later. Then, the mounting bolts 26, 26, 26 and the bolt holes 24c, 24c, 24c are made to coincide with each other, and the electrode portion 24 is placed on the opening 20b via the seal 28 and covered, and the nuts 27, 27, 27 are used. Tighten and fix. Thus, the grounding device 23 can be attached without fuel leaking. Any one of the mounting bolts 26, 26, and 26 is used as a terminal mounting portion, and a ground terminal 29 provided at one end of the ground wire is fastened and fixed together with a nut 27. However, the opening 20b to which the fuel level gauge 22 is attached and the opening 20c to which the grounding device 23 is attached have the same size, and the mounting bolts of both are arranged at the same position on the outer periphery of the openings 20b and 20c. It is possible to share the mounting structure of the earthing device 22 and the grounding device 23, reduce the number of parts, and reduce the cost.

前記係止板２４ｂは、取付部２４ａの下面中央に垂設され、係止板２４ｂの中央に支持孔２４ｄを開口して導電体２５の一端を揺動自在に支持し、係止板２４ｂの下部に導電体２５の揺動を規制する規制部２４ｅが形成される。規制部２４ｅは、先端を切り欠いてその凸部を側方（導電体２５側）に水平方向に折り曲げて形成している。この規制部２４ｅの一端に導電体２５が当接し、導電体２５の回動が規制される。この導電体２５と規制部２４ｅの当接位置は、導電体２５の回動下死点よりも燃料レベルゲージ２２側としている。こうして、図２に示すように、導電体２５の回動範囲が燃料レベルゲージ２２のフロート２２ｄの揺動範囲と正面視で重ならないようにしている。つまり、燃料レベルゲージ２２は鉛直下方より一側（右側）に揺動するように構成し、導電体２５は鉛直下方より他側（左側）に揺動するように規制部２４ｅで規制する。なお、規制部２４ｅの構成は前記板体を折り曲げて形成する構成に限定するものではなく、ピンを側方に突出して導電体２５と当接する等の構成であってもよい。   The locking plate 24b is suspended from the center of the lower surface of the mounting portion 24a, and a support hole 24d is opened at the center of the locking plate 24b to support one end of the conductor 25 so as to be swingable. A regulating portion 24e that regulates the swinging of the conductor 25 is formed in the lower portion. The restricting portion 24e is formed by notching the tip and bending the convex portion in the horizontal direction to the side (conductor 25 side). The conductor 25 comes into contact with one end of the restricting portion 24e, and the rotation of the conductor 25 is restricted. The contact position between the conductor 25 and the restricting portion 24e is closer to the fuel level gauge 22 than the rotational bottom dead center of the conductor 25. In this way, as shown in FIG. 2, the rotation range of the conductor 25 is not overlapped with the swing range of the float 22 d of the fuel level gauge 22 in front view. That is, the fuel level gauge 22 is configured to swing from the vertically lower side to the one side (right side), and the conductor 25 is regulated by the regulating unit 24e so as to swing from the vertically lower side to the other side (left side). Note that the configuration of the restricting portion 24e is not limited to the configuration in which the plate body is bent, and may be a configuration in which a pin protrudes laterally and contacts the conductor 25.

前記導電体２５は、金属製のロッドを折り曲げ形成して燃料タンク２０のタンク内の上端から下端までの長さ以上に構成して、導電体２５の下端が燃料タンク２０の底面に当接して斜めの状態となる長さとしている。導電体２５の上端はＬ字状に折り曲げて揺動軸２５ａとし、揺動軸２５ａを前記支持孔２４ｄに挿入して先端をかしめたり、リングを係止したりして抜けないように、かつ、回動自在に係止している。導電体２５の下端部２５ｂは略Ｕ字状に折り曲げ形成し、燃料タンク２０の底面と下端部２５ｂとの当接部分が曲面となるようにして、燃料タンク２０の底面が傷付かず、引っ掛からないようにしている。   The conductor 25 is formed by bending a metal rod to have a length longer than the upper end to the lower end in the tank of the fuel tank 20, and the lower end of the conductor 25 is in contact with the bottom surface of the fuel tank 20. The length is an oblique state. The upper end of the conductor 25 is bent in an L shape to form a swing shaft 25a, and the swing shaft 25a is inserted into the support hole 24d so that the tip thereof is caulked or the ring is locked so that it cannot be removed. , Is pivotably locked. The lower end 25b of the conductor 25 is formed to be bent in a substantially U shape so that the contact portion between the bottom surface of the fuel tank 20 and the lower end portion 25b is a curved surface so that the bottom surface of the fuel tank 20 is not damaged and is not caught. I am trying not to.

また、前記揺動軸２５ａの軸心と前記燃料レベルゲージ２２のアーム２２ｃ上端の回動軸の軸心２２ｅは、図４に示すように、平行に配置され、導電体２５の揺動方向と燃料レベルゲージ２２のフロートの揺動方向が平行となるように配置され、かつ、後面視で重複しないように配置して、両者が揺動したときに干渉しないようにしている。   Further, the axis 22e of the pivot shaft 25a and the axis 22e of the pivot shaft at the upper end of the arm 22c of the fuel level gauge 22 are arranged in parallel as shown in FIG. The fuel level gauges 22 are arranged so that the rocking directions of the floats are parallel and do not overlap in the rear view so that they do not interfere when both of them rock.

このような構成において、アース装置２３を燃料タンク２０に取り付ける場合、アース装置２３を燃料タンク２０の開口部２０ｃから挿入するとき、導電体２５は、規制部２４ｅに当接して揺動が規制され、燃料レベルゲージ２２のフロート２２ｄ側へは回動しないようになっている。なお、フロート２２ｄと同方向に導電体２５が回動可能であると、取付位置がずれている場合、導電体２５とフロート２２ｄが揺動したときに絡む可能性があるが、本実施形態では導電体２５はフロート２２ｄに対して反対方向に取り付けられるため、干渉することはない。   In such a configuration, when the grounding device 23 is attached to the fuel tank 20, when the grounding device 23 is inserted from the opening 20c of the fuel tank 20, the conductor 25 is brought into contact with the restricting portion 24e and the swinging thereof is restricted. The fuel level gauge 22 is not rotated toward the float 22d side. If the conductor 25 is rotatable in the same direction as the float 22d, there is a possibility that the conductor 25 and the float 22d may get entangled when the mounting position is shifted. Since the conductor 25 is mounted in the opposite direction to the float 22d, there is no interference.

そして、ボルト孔２４ｃと取付ボルト２６により位置決めされて、アース装置２３が燃料タンク２０に取り付けられた状態では、導電体２５の下端部２５ｂが燃料タンク２０の底面に当接して、導電体２５は揺動軸２５ａを中心に回動し、規制部２４ｅには当接しない状態で斜めに傾いた状態となっている。このように構成することで、導電体２５の長さや電極部２４の高さや取付ボルト２６の長さや燃料タンク２０の高さ等の精度を高く保つ必要がなく、導電体２５の下端は燃料タンク２０の底面に常時当接させることができ、燃料が満タンから空になるまでの全範囲でアースさせることが可能となる。   When the grounding device 23 is attached to the fuel tank 20 after being positioned by the bolt hole 24c and the mounting bolt 26, the lower end 25b of the conductor 25 comes into contact with the bottom surface of the fuel tank 20, and the conductor 25 is It is pivoted about the swing shaft 25a and tilted obliquely without contacting the restricting portion 24e. With this configuration, it is not necessary to maintain high accuracy such as the length of the conductor 25, the height of the electrode portion 24, the length of the mounting bolt 26, the height of the fuel tank 20, and the like. It is possible to always make contact with the bottom surface of 20 and to ground the fuel over the entire range from the full tank to the empty state.

次に、アース装置２３の他の実施形態について説明する。
図８に示すように、アース装置２３は、電極部３４と導電体３５からなる。電極部３４は上下方向を軸心とする円柱状に構成して、軸心に導電体３５の上部を貫通して固定している。電極部３４は燃料タンク２０の上面２０ａに開口した開口部２０ｃに上方より挿入して固定される。電極部３４と開口部２０ｃの間を密閉するために、カラー３６を燃料タンク２０成形時にインサート成形し、その上部にＯリング３７を介装する構成としている。 Next, another embodiment of the ground device 23 will be described.
As shown in FIG. 8, the ground device 23 includes an electrode portion 34 and a conductor 35. The electrode part 34 is formed in a columnar shape with the vertical direction as an axis, and the upper part of the conductor 35 is passed through and fixed to the axis. The electrode part 34 is inserted and fixed from above into an opening 20c opened in the upper surface 20a of the fuel tank 20. In order to seal between the electrode portion 34 and the opening 20c, the collar 36 is insert-molded when the fuel tank 20 is molded, and an O-ring 37 is interposed on the collar 36.

導電体３５は金属製の上ロッド３５ａと下ロッド３５ｂより構成し、上ロッド３５ａは上端をネジ部としてアース端子２９をナットにより固定している。上ロッド３５ａの下部は燃料タンク２０の下部まで延設し、下端にリング部３５ｃを形成し、下ロッド３５ｂの上部に形成したフック部３５ｄを抜けないように、かつ、揺動自在に係合している。下ロッド３５ｂの下端は前記同様にＵ字状に形成している。導電体３５の上下長さは燃料タンク２０のタンク内の上端から下端までの長さ以上として、下ロッド３５ｂの下端が燃料タンク２０の底面に当接して折れ曲がる程度としている。   The conductor 35 is composed of a metal upper rod 35a and a lower rod 35b. The upper rod 35a has an upper end as a screw portion and a ground terminal 29 is fixed by a nut. The lower part of the upper rod 35a extends to the lower part of the fuel tank 20, and a ring part 35c is formed at the lower end. The hook part 35d formed on the upper part of the lower rod 35b is not pulled out and is swingably engaged. doing. The lower end of the lower rod 35b is formed in a U shape similarly to the above. The vertical length of the conductor 35 is set to be longer than the length from the upper end to the lower end in the tank of the fuel tank 20, and the lower end of the lower rod 35 b is in contact with the bottom surface of the fuel tank 20 and bent.

こうして、アース装置２３は簡単な構成で製作することができ、電極部３４を上方より差し込むだけでアース装置２３を取り付けることができ、下ロッド３５ｂは燃料タンク２０の下部に位置し、その揺動範囲は小さく、フロート２２ｄの揺動範囲外に配置することができて、絡むことがなく、底面に常時当接させて、燃料の多少に関係なくアースすることができる。   Thus, the grounding device 23 can be manufactured with a simple configuration, and the grounding device 23 can be attached simply by inserting the electrode part 34 from above, and the lower rod 35b is located at the lower part of the fuel tank 20 and swings. The range is small and can be disposed outside the swinging range of the float 22d, so that it does not get entangled and can always be in contact with the bottom surface to be grounded regardless of the amount of fuel.

以上のように、燃料タンク２０内の燃料に生じる静電気を放電するアース装置であって、燃料タンク２０の上面２０ａにアース装置２３と燃料レベルゲージ２２が併置して配置され、アース装置２３は、アース端子２９を備えて燃料タンク２０の上面２０ａに取り付けられる電極部２４と、上部が前記電極部２４に揺動自在に係止され、下部が燃料タンク２０内の底部に延設される導電体２５とからなり、前記導電体２５の揺動方向と燃料レベルゲージ２２のフロート２２ｄの揺動方向が平行となるように配置したので、簡単な構成で、導電体２５は常時燃料タンク２０の底面と当接してアースすることができて、静電気を放電させることができる。そして、燃料タンク２０が傾斜して、導電体２５とフロート２２ｄが揺動しても絡み合うことがない。   As described above, the grounding device discharges static electricity generated in the fuel in the fuel tank 20, and the grounding device 23 and the fuel level gauge 22 are disposed on the upper surface 20 a of the fuel tank 20. An electrode portion 24 provided with a ground terminal 29 and attached to the upper surface 20a of the fuel tank 20, and an electric conductor whose upper portion is swingably locked to the electrode portion 24 and whose lower portion extends to the bottom portion of the fuel tank 20. 25, and the swinging direction of the conductor 25 and the swinging direction of the float 22d of the fuel level gauge 22 are arranged in parallel, so that the conductor 25 always has a bottom surface of the fuel tank 20 with a simple configuration. Can be grounded by abutting and the static electricity can be discharged. Even if the fuel tank 20 is inclined and the conductor 25 and the float 22d are swung, they are not entangled.

また、前記電極部２４には前記導電体２５の揺動を規制する規制部２４ｅが配置されるので、アース装置２３を燃料タンク２０に取り付けるときに、揺動方向がフロート２２ｄ側となることがなく、組み立て性を向上できる。   Further, since the electrode portion 24 is provided with a restricting portion 24e for restricting the swing of the conductor 25, when the ground device 23 is attached to the fuel tank 20, the swing direction may be on the float 22d side. As a result, the assembly can be improved.

また、前記電極部２４はロッドにより構成され、先端が略Ｕ字状に折り曲げ形成されるので、導電体２５の下端が燃料タンク２０の底面と当接したときに、傷付けることがなく、引っ掛かることもないのである。   Further, since the electrode portion 24 is composed of a rod and the tip is bent into a substantially U shape, the electrode portion 24 is caught without being damaged when the lower end of the conductor 25 contacts the bottom surface of the fuel tank 20. There is no.

２０ 燃料タンク
２０ａ 上面
２２ 燃料レベルゲージ
２２ｄ フロート
２３ アース装置
２４ 電極部
２４ｅ 規制部
２５ 導電体
２９ アース端子
DESCRIPTION OF SYMBOLS 20 Fuel tank 20a Upper surface 22 Fuel level gauge 22d Float 23 Grounding device 24 Electrode part 24e Control part 25 Electric conductor 29 Ground terminal

Claims (3)

燃料タンク内の燃料に生じる静電気を放電するアース装置であって、燃料タンク上面にアース装置と燃料レベルゲージが併置して配置され、アース装置は、アース端子を備えて燃料タンク上面に取り付けられる電極部と、上部が前記電極部に揺動自在に係止され、下部が燃料タンク内の底部に延設される導電体とからなり、前記導電体の揺動方向と燃料レベルゲージのフロートの揺動方向が平行となるように配置したことを特徴とする燃料タンクのアース装置。   An earthing device for discharging static electricity generated in fuel in a fuel tank, wherein an earthing device and a fuel level gauge are arranged side by side on the upper surface of the fuel tank, and the earthing device is provided with an electrode attached to the upper surface of the fuel tank with an earth terminal And a conductor that is swingably locked to the electrode portion and a lower portion that extends to the bottom of the fuel tank. The swing direction of the conductor and the float of the fuel level gauge float A grounding device for a fuel tank, characterized in that the moving directions are parallel to each other. 前記電極部には前記導電体の揺動を規制する規制部が配置されることを特徴とする請求項１に記載の燃料タンクのアース装置。   2. The fuel tank grounding device according to claim 1, wherein the electrode portion is provided with a restricting portion that restricts swinging of the conductor. 3. 前記電極部はロッドにより構成され、先端が略Ｕ字状に折り曲げ形成されることを特徴とする請求項１または請求項２に記載の燃料タンクのアース装置。
3. The fuel tank grounding device according to claim 1, wherein the electrode portion is formed of a rod, and a tip thereof is bent into a substantially U shape. 4.
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JPH0272936U (en) * 1988-11-25 1990-06-04
JP3155020B2 (en) * 1991-03-18 2001-04-09 パイオニア株式会社 Navigation device
JP2001271718A (en) * 2000-03-27 2001-10-05 Piolax Inc Intank type fuel pump device
JP4051564B2 (en) * 2002-10-18 2008-02-27 株式会社デンソー Fuel supply device
JP4709877B2 (en) * 2008-07-02 2011-06-29 本田技研工業株式会社 Fuel filter device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0272936U (en) * 1988-11-25 1990-06-04
JP3155020B2 (en) * 1991-03-18 2001-04-09 パイオニア株式会社 Navigation device
JP2001271718A (en) * 2000-03-27 2001-10-05 Piolax Inc Intank type fuel pump device
JP4051564B2 (en) * 2002-10-18 2008-02-27 株式会社デンソー Fuel supply device
JP4709877B2 (en) * 2008-07-02 2011-06-29 本田技研工業株式会社 Fuel filter device

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