JP2012011806A - Filler opening structure and filler cap cover of tank - Google Patents

Filler opening structure and filler cap cover of tank Download PDF

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JP2012011806A
JP2012011806A JP2010147409A JP2010147409A JP2012011806A JP 2012011806 A JP2012011806 A JP 2012011806A JP 2010147409 A JP2010147409 A JP 2010147409A JP 2010147409 A JP2010147409 A JP 2010147409A JP 2012011806 A JP2012011806 A JP 2012011806A
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cap
filler
tank
filler neck
cover
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JP5223891B2 (en
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Kenji Kawamoto
健二 川本
Tsutomu Ninomiya
力 二野宮
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Kobelco Construction Machinery Co Ltd
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Kobelco Construction Machinery Co Ltd
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Priority to PCT/JP2011/003606 priority patent/WO2012001925A1/en
Priority to CN201180032481.9A priority patent/CN103038082B/en
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    • 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
    • B60K15/04—Tank inlets
    • B60K15/0406—Filler caps for fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1605—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior
    • B65D51/1622—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior by means of a passage for the escape of gas between the closure and the lip of the container mouth
    • 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
    • B60K15/04—Tank inlets
    • B60K15/0406—Filler caps for fuel tanks
    • B60K2015/0451—Sealing means in the closure cap

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Closures For Containers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PROBLEM TO BE SOLVED: To surely prevent both of clogging with dust in a vent hole and intrusion of dust into the tank, also, to cope with an existing tank with a filler cap by post-installation.SOLUTION: The filler cap 13 having the vent hole 14 is covered with a cap cover 15 in a state that the cap cover 15 covers the cap 13 and a filler neck 12 striding over them. Independent ring-like seal part 17... adhering closely to the outer peripheral plane of a filler neck is installed projectingly at the inner periphery of the cap cover 15 at a plurality of places in the cover height direction. A ventilation passage 20 is formed such that air is moved between a cover tip opening and the vent hole 14 while swirling air around the filler neck by a ventilation groove 18 formed between these seal parts and a notch 19 provided to each seal part while being shifted in position alternately.

Description

本発明は通気穴付きの給油キャップを備えたタンクの給油口構造、及び同構造に使用される給油キャップカバーに関するものである。   The present invention relates to a fuel filler structure for a tank provided with a fuel cap with a vent hole, and a fuel cap cover used in the structure.

図８，９に油圧ショベル用燃料タンクにおける従来の給油口構造を示す。   8 and 9 show a conventional fuel filler structure in a fuel tank for a hydraulic excavator.

燃料タンク１は上面に円筒状のフィラーネック(給油口)２を備え、このフィラーネック２の上端開口部に給油キャップ３が、ねじ嵌め構造等によって着脱自在に取付けられる(特許文献１，２参照)。   The fuel tank 1 has a cylindrical filler neck (fuel filler port) 2 on the upper surface, and a fuel cap 3 is detachably attached to the upper end opening of the filler neck 2 by a screw fitting structure or the like (see Patent Documents 1 and 2). ).

給油キャップ３には、タンク内外を連通させる通気穴４がたとえばキャップ内周側にＬ字形に設けられ、この通気穴４により燃料の増減に応じたタンク内の空気の出入り作用(エアブリーザ作用)が行われる(特許文献２参照)。   The fuel filler cap 3 is provided with a vent hole 4 that communicates between the inside and outside of the tank, for example, in an L shape on the inner peripheral side of the cap. The vent hole 4 allows the air to enter and exit the tank (air breather action) according to the increase or decrease of fuel. (See Patent Document 2).

一方、ギヤケース等の潤滑油ケースに適用される内嵌め式の給油キャップにおいて、頭付き軸状のキャップの頭部下面に通気穴を設ける一方、軸部の外周にリング状の凸部をキャップ長さ方向に間隔を置いて複数設け、この凸部の外周部に切欠を交互に周方向に位置ずれして設けることによって、通気穴に通じるラビリンス構造の通気路を形成し、機体の傾斜や振動によってタンク内の油が通気穴から溢れ出ないようにこの通気路でせき止める技術が公知である(特許文献３参照)。   On the other hand, in an internally-fitted oil cap that is applied to a lubricating oil case such as a gear case, a vent hole is provided on the lower surface of the head of the headed shaft-shaped cap, while a ring-shaped protrusion is provided on the outer periphery of the shaft. A plurality of air gaps are provided at intervals in the vertical direction, and notches are provided in the outer peripheral portion of the convex portion so as to be alternately displaced in the circumferential direction, thereby forming a labyrinth-structured air passage leading to the air holes, and tilting and vibration of the aircraft Therefore, a technique for preventing the oil in the tank from spilling out from the vent hole is known (see Patent Document 3).

特開２００９−１６６８０７号公報JP 2009-166807 A 特開平９−２９０８５４号公報Japanese Patent Laid-Open No. 9-290854 特開平８−２８７８２号公報JP-A-8-28782

給油キャップ３の通気穴４が、キャップ内周側に直線状やＬ字形の溝として形成された公知技術によると、油圧ショベルをダストが充満した現場や多量の砂塵が舞う現場で使用する場合に、通気穴がダスト(砂塵を含む。以下同じ)で詰まったり、その前段階としてダストがタンク内に吸い込まれて燃料に混入したりする事態が多発していた。   According to the known technology in which the ventilation hole 4 of the oil filler cap 3 is formed as a linear or L-shaped groove on the inner peripheral side of the cap, the hydraulic excavator is used in a site full of dust or a site where a large amount of sand dust dances. The air vents were often clogged with dust (including sand dust, the same applies hereinafter), and dust was sucked into the tank and mixed into the fuel as a previous step.

ところで、特許文献３に記載された公知技術をタンクに適用した場合、ラビリンス構造によってタンク内へのダストの侵入防止の点で一定の効果が得られると考えられる。   By the way, when the known technique described in Patent Document 3 is applied to the tank, it is considered that a certain effect can be obtained in terms of preventing dust from entering the tank by the labyrinth structure.

しかし、通気路穴そのものは直線状に形成され、直接外部に開口しているため、この通気穴のダスト詰まりは防止できない。   However, since the air passage hole itself is formed in a straight line and directly opens to the outside, it is not possible to prevent this air hole from being clogged with dust.

また、フィラーネックの内周側でラビリンス構造によってダストをせき止めるため、せき止められたダストが機体の振動によって通気路を徐々に下降してタンク内に落下するおそれがある。   Further, since the dust is damped by the labyrinth structure on the inner peripheral side of the filler neck, the damped dust may gradually descend the air passage due to the vibration of the airframe and fall into the tank.

さらに、給油キャップ自体にラビリンス構造を付加するため、ダストの多い現場とそうでない現場に応じてラビリンス構造付きの給油キャップとこれよりも安価な通常の給油キャップの二種類を用意し、使い分けなければならないこと、及び既存のタンクに対して給油キャップそのものを交換しなければならないことから、コスト、管理の面で不利となる。   Furthermore, in order to add a labyrinth structure to the oil cap itself, prepare two types of oil caps with a labyrinth structure and less expensive regular oil caps depending on the dusty site and the other sites, and use them properly This is disadvantageous in terms of cost and management because it is not necessary and the oil cap itself must be replaced for the existing tank.

そこで本発明は、通気穴のダスト詰まり及びタンク内へのダストの侵入をともに確実に防止でき、しかも既存の給油キャップ付きタンクに後付けで対応することができるタンクの給油口構造及び給油キャップカバーを提供するものである。
建設機械を提供するものである。 Accordingly, the present invention provides a tank filler port structure and a filler cap cover that can reliably prevent dust clogging in the vent holes and dust from entering the tank and can be retrofitted to an existing tank with a filler cap. It is to provide.
Providing construction machinery.

請求項１の発明(タンクの給油口構造)は、タンクのフィラーネックに給油キャップが設けられ、この給油キャップに外気導入用の通気穴が設けられたタンクの給油口構造において、
(Ａ) 上記給油キャップにゴム等の弾性材料からなる給油キャップカバーが被嵌され、
(Ｂ) この給油キャップカバーは、上記給油キャップと上記フィラーネックとを覆うカバー本体と、このカバー本体における上記フィラーネックを覆う部分の内周に同本体高さ方向の複数個所に内向きに突設されて上記フィラーネックの外周面に密着するリング状のシール部とを備え、
(Ｃ) このシール部は、空気をフィラーネック周りで旋回させながら同カバー先端開口と上記通気穴との間で移動させる通気路が形成される状態で設けられたものである。 The invention according to claim 1 (tank filling port structure) is a tank filling port structure in which a filler cap is provided in a filler neck of the tank, and a vent hole for introducing outside air is provided in the filling cap.
(A) An oil supply cap cover made of an elastic material such as rubber is fitted on the oil supply cap,
(B) The fuel cap cover protrudes inward at a plurality of locations in the height direction of the main body of the cover body covering the fuel cap and the filler neck, and the inner periphery of the cover body covering the filler neck. A ring-shaped seal portion that is provided and is in close contact with the outer peripheral surface of the filler neck,
(C) This seal portion is provided in a state in which a ventilation path is formed to move the air around the filler neck while moving the air around the filler neck.

請求項２の発明は、請求項１の構成において、上記各シール部は、隣り合うもの同士間に通気溝が形成される状態で独立して平行に設けられ、各シール部の周方向の一部に通気溝同士を連通させる切欠が、交互に周方向に位置ずれして設けられることによって上記通気路が形成されたものである。   According to a second aspect of the present invention, in the configuration of the first aspect, each of the seal portions is provided independently and in parallel in a state where a ventilation groove is formed between adjacent ones. The ventilation path is formed by providing notches that allow the ventilation grooves to communicate with each other at positions alternately displaced in the circumferential direction.

請求項３の発明は、請求項１の構成において、上記各シール部は、隣り合うもの同士間に通気路としての螺旋状の通気溝が形成される状態でねじ山状に連続して設けられたものである。   According to a third aspect of the present invention, in the configuration of the first aspect, each of the seal portions is continuously provided in a thread shape in a state in which a spiral ventilation groove as a ventilation path is formed between adjacent ones. It is a thing.

請求項４の発明は、請求項２または３の構成において、上記各シール部は、先端がフィラーネック外周面にラップ状態で密着し得る突出寸法をもって設けられたものである。   According to a fourth aspect of the present invention, in the configuration of the second or third aspect, each of the sealing portions is provided with a protruding dimension that allows the tip to be in close contact with the outer peripheral surface of the filler neck in a lapped state.

請求項５の発明(タンクの給油キャップカバー)は、ゴム等の弾性材料により、タンクのフィラーネックに設けられた給油キャップに被嵌される形状に形成され、内周における高さ方向の複数個所に、被嵌状態で上記フィラーネックの外周面に密着するリング状のシール部を備え、このシール部は、空気をフィラーネック周りで旋回させながら、同カバー先端開口と上記給油キャップに設けられた外気導入用の通気穴との間で移動させる通気路が形成される状態で設けられたものである。   The invention according to claim 5 (tank refueling cap cover) is formed of an elastic material such as rubber so as to be fitted into a refueling cap provided on a filler neck of the tank, and is provided at a plurality of positions in the height direction on the inner periphery. In addition, a ring-shaped seal portion that is in close contact with the outer peripheral surface of the filler neck in a fitted state is provided, and this seal portion is provided on the cover front end opening and the oiling cap while swirling air around the filler neck. It is provided in a state in which an air passage to be moved between the air hole for introducing outside air is formed.

本発明によると、通気穴を備えた給油キャップにキャップカバーを、同キャップとフィラーネックとに跨ってこれらを覆う状態で被せ、このキャップカバーの内周にフィラーネック外周面に密着するリング状のシール部をカバー高さ方向の複数個所に内向きに突設し、このシール部によって、空気をフィラーネック周りで旋回させながらカバー先端開口と通気穴との間で移動させる通気路を形成するため、この通気路と通気穴とによって空気の流通は許容しながら、空気中のダストは通気路でのラビリンス効果によって通気路内でせき止めることができる。   According to the present invention, a cap cover is placed on an oil filler cap provided with a vent hole in a state of covering the cap and the filler neck so as to cover them, and a ring-like shape that adheres closely to the outer periphery of the filler neck on the inner periphery of the cap cover. In order to form a ventilation path that protrudes inward at a plurality of locations in the cover height direction and moves the air between the cover tip opening and the vent hole while swirling air around the filler neck. While the air passage and the air holes allow the air to flow, dust in the air can be blocked in the air passage by the labyrinth effect in the air passage.

また、せき止めたダストは、自重や振動によってキャップ下端側に落下させ、通気路から外部に自然に排出することができる。つまり、給油キャップ自体にラビリンス構造を付加する場合のように、せき止めたダストがタンク内に落下するおそれがない。   In addition, the dammed dust can be dropped to the lower end of the cap by its own weight or vibration and discharged naturally from the air passage. That is, unlike the case where a labyrinth structure is added to the fuel cap itself, there is no possibility that the dammed dust will fall into the tank.

さらに、適時、キャップカバーを取外して洗浄することにより付着したダストをきれいに除去することができる。   Furthermore, the attached dust can be removed cleanly by removing the cap cover and washing it at an appropriate time.

こうして、給油キャップのエアブリーザ機能を確保しながら、通気穴のダスト詰まり及びダストのタンク内への侵入を確実に防止することができる。   In this way, it is possible to reliably prevent dust from clogging in the air holes and intrusion of dust into the tank while ensuring the air breather function of the fuel cap.

しかも、給油キャップに別体のキャップカバーを被せる構成であるため、既存の給油キャップ付きタンクに必要に応じて後付けで対応することができる。   Moreover, since the oil cap is covered with a separate cap cover, the existing tank with the oil cap can be retrofitted as necessary.

すなわち、ダストが多くてダスト詰まりやダスト混入のおそれの高い現場で使用される機械のタンクのみに、オプションとして既設の給油キャップに同カバーを後付けすればよい。   That is, it is only necessary to attach the cover to an existing oil cap as an option only for a tank of a machine that is used at a site where there is a high risk of dust clogging or dust mixing.

このため、給油キャップ自体を取り替える場合と比較して、コスト、管理の面で有利となる。   For this reason, it becomes advantageous in terms of cost and management as compared with the case of replacing the fuel cap itself.

ここで、請求項２の発明によると、各シール部を互いの間に通気溝が形成される状態で独立して平行に設け、それぞれの一部に通気溝同士を連通させる切欠を交互に周方向に位置ずれして設けることによって上記通気路を形成したから、空気は旋回とフィラーネック長さ方向移動を繰り返して外部から通気穴に到達する。   According to the second aspect of the present invention, the seal portions are provided independently and in parallel with each other in a state where a ventilation groove is formed between them, and notches for communicating the ventilation grooves with each other are alternately surrounded. Since the air passage is formed by being displaced in the direction, the air repeatedly turns and moves in the length direction of the filler neck to reach the air hole from the outside.

従って、ダストを迷路でせき止める点での効果が顕著となる。   Accordingly, the effect of stopping dust in the maze is remarkable.

一方、請求項３の発明によると、各シール部をねじ山状に連続して設けることによって螺旋状の通気路を形成する(シール部間の通気溝がそのまま通気路となる)ため、空気の流れは単純な螺旋流となる。   On the other hand, according to the third aspect of the present invention, a spiral air passage is formed by continuously providing each seal portion in the form of a screw thread (the air groove between the seal portions becomes the air passage as it is). The flow is a simple spiral flow.

このため、ダストはこの螺旋流に乗って通気路内をある程度は移動するが、基本的にシール部が障壁となる点は請求項２の発明と変わらないため、通気穴のダスト詰まり及びダストのタンク内への侵入を防止する点で十分な効果を得ることができる。   For this reason, although the dust rides on the spiral flow to some extent in the ventilation path, the point that the seal portion is basically a barrier is not different from that of the invention of claim 2, so the dust clogging of the ventilation holes and the dust A sufficient effect can be obtained in terms of preventing entry into the tank.

請求項４の発明によると、請求項２または３の構成において、各シール部をフィラーネック外周面に対し先端がラップする状態で密着させるため、単に接触させる場合と比較して、シール効果が高くなり、細かいダストでも漏らさず、かつ、長期に亘って確実にせき止めることができる。   According to the invention of claim 4, in the configuration of claim 2 or 3, each seal portion is brought into close contact with the outer peripheral surface of the filler neck so that the sealing effect is higher than in the case of simply contacting. Thus, even fine dust is not leaked and can be reliably damped over a long period of time.

本発明の第１実施形態に係る給油口構造を示す断面図である。It is sectional drawing which shows the fuel filler structure which concerns on 1st Embodiment of this invention. (ａ)は図１のａ−ａ線、(ｂ)は図１のｂ−ｂ線各断面図である。(a) is the aa line of FIG. 1, (b) is each bb sectional drawing of FIG. 給油キャップカバーの下側から見た斜視図である。It is the perspective view seen from the lower side of the oiling cap cover. 図１の一部拡大図である。FIG. 2 is a partially enlarged view of FIG. 1. 給油キャップカバーの内周面を展開して示す図である。It is a figure which expand | deploys and shows the internal peripheral surface of a fueling cap cover. 同カバーによるダストせき止め効果を説明するための実験結果を示す図である。It is a figure which shows the experimental result for demonstrating the dust damping effect by the cover. 本発明の第２実施形態を示す図５相当図である。FIG. 6 is a view corresponding to FIG. 5 showing a second embodiment of the present invention. 従来の給油口構造を示す断面図である。It is sectional drawing which shows the conventional oil filler opening structure. 図８の一部拡大図である。FIG. 9 is a partially enlarged view of FIG. 8.

本発明の実施形態を図１〜図７によって説明する。   An embodiment of the present invention will be described with reference to FIGS.

以下の実施形態では、背景技術の説明に合わせて油圧ショベルに搭載された燃料タンクを適用対象としている。   In the following embodiments, a fuel tank mounted on a hydraulic excavator is applied to the description of the background art.

第１実施形態(図１〜図６参照)
第１実施形態において、
(ｉ) 燃料タンク１１は上面に円筒状のフィラーネック(給油口)１２を備え、このフィラーネック１２の上端開口部に給油キャップ１３が、ねじ嵌め構造等によって着脱自在に取付けられる点、
(ｉｉ) 給油キャップ１３には、タンク内外を連通させる通気穴１４がキャップ内周側にＬ字形の溝として設けられ、この通気穴１４により燃料の増減に応じたタンク内の空気の出入り作用(エアブリーザ作用)が行われる点
は、図７，８に示す従来の給油口構造と同じである。 1st Embodiment (refer FIGS. 1-6)
In the first embodiment,
(i) The fuel tank 11 includes a cylindrical filler neck (fuel filler port) 12 on the upper surface, and a fuel cap 13 is detachably attached to the upper end opening of the filler neck 12 by a screw-fitting structure or the like.
(ii) The fuel filler cap 13 is provided with a vent hole 14 communicating with the inside and outside of the tank as an L-shaped groove on the inner peripheral side of the cap. The vent hole 14 allows the air to enter and exit the tank according to the increase or decrease of fuel ( The air breather action) is the same as in the conventional oil filler structure shown in FIGS.

第１実施形態においては、ゴムや弾性プラスチック等の弾性材料から成る給油キャップカバー１５が、既存の給油キャップ１３に後付けによって着脱自在に被嵌されている。   In the first embodiment, an oil supply cap cover 15 made of an elastic material such as rubber or elastic plastic is detachably fitted to an existing oil supply cap 13 by retrofitting.

この給油キャップカバー(以下、単にキャップカバーという)１５は、給油キャップ１３の上面及び側面とフィラーネック１２の上部外周面とに跨ってこれらを覆う円筒状のカバー本体１６と、このカバー本体１６におけるフィラーネック上部外周面を覆う下半部の内周において同本体高さ方向の複数個所で内向きに突出するリング状のシール部１７…とが一体に成形されて成っている。   This oiling cap cover (hereinafter simply referred to as a cap cover) 15 includes a cylindrical cover body 16 that covers the upper and side surfaces of the oiling cap 13 and the upper outer peripheral surface of the filler neck 12, and a cover body 16 Ring-shaped seal portions 17 projecting inward at a plurality of locations in the height direction of the main body are integrally formed on the inner periphery of the lower half portion covering the filler neck upper outer peripheral surface.

シール部１７…は、カバー被嵌状態で先端部がフィラーネック外周面に弾性的に密着し、かつ、上記密着状態で上下隣り合うもの同士間に通気溝１８…が形成される状態で互いに独立して平行に設けられている。   The seal portions 17 are independent from each other in a state in which the tip portion is elastically adhered to the outer peripheral surface of the filler neck when the cover is fitted, and a ventilation groove 18 is formed between the upper and lower adjacent members in the above-mentioned adhesion state. Are provided in parallel.

この場合、各シール部１７…は、図４に示すように先端がフィラーネック外周面にラップ状態で密着し得る突出寸法Ｌをもって設けられている。   In this case, as shown in FIG. 4, each seal portion 17 is provided with a projecting dimension L at which the tip can be in close contact with the outer peripheral surface of the filler neck in a lapped state.

また、このシール部１７…には、周方向の一部(図例では１８０°間隔を置いた対称二個所)に、隣接する通気溝１８，１８同士を連通させる切欠１９が、交互に周方向にある角度(同、９０°)で位置ずれして設けられている。   Further, in the seal portion 17..., Notches 19 for communicating the adjacent ventilation grooves 18, 18 are alternately provided in the circumferential direction at a part in the circumferential direction (two symmetrical places with an interval of 180 ° in the illustrated example). At a certain angle (90 °).

この通気溝１８と切欠１９とによって、外部と通気穴１４とをつなぐ通気路２０が形成され、図２，５に示すように空気がこの通気路２０及び通気穴１４を通って出入りする。   The ventilation groove 18 and the notch 19 form a ventilation path 20 that connects the outside and the ventilation hole 14, and air enters and exits through the ventilation path 20 and the ventilation hole 14 as shown in FIGS.

この給油口構造によると、通気路２０と通気穴１４とによってタンク内外の空気の流通は許容しながら、空気中のダストは通気路２０でのラビリンス効果によって通気路２０内でせき止めることができる。   According to this fuel filler opening structure, air in and out of the tank is allowed to flow through the air passage 20 and the air holes 14, and dust in the air can be dammed in the air passage 20 by the labyrinth effect in the air passage 20.

また、せき止められたダストは、自重や振動によってキャップ下端側に落下し、通気路から外部に自然に排出される。いいかえれば、給油キャップ自体にラビリンス構造を付加する場合のように、せき止めたダストがタンク内に落下するおそれがない。   Further, the dammed dust falls to the lower end of the cap due to its own weight or vibration, and is naturally discharged from the air passage to the outside. In other words, there is no possibility that the dammed dust will fall into the tank as in the case where a labyrinth structure is added to the fuel cap itself.

さらに、適時、キャップカバーを取外して洗浄することにより付着したダストをきれいに除去することができる。   Furthermore, the attached dust can be removed cleanly by removing the cap cover and washing it at an appropriate time.

こうして、給油キャップ１３のエアブリーザ機能を確保しながら、外部から通気穴１４へのダストの侵入を防止し、通気穴１４のダスト詰まり及びダストのタンク内燃料への混入を確実に防止することができる。   In this way, while ensuring the air breather function of the fuel filler cap 13, dust can be prevented from entering the vent hole 14 from the outside, and dust clogging in the vent hole 14 and mixing of dust into the fuel in the tank can be reliably prevented. .

とくにこの第１実施形態によると、通気路２０が水平なリング状の通気溝１８と上下方向の切欠１９とによって迷路状に形成され、空気が水平旋回とフィラーネック長さ方向(上下方向)移動を繰り返しながら流れるため、ダストのせき止め効果が顕著となる。   In particular, according to the first embodiment, the ventilation path 20 is formed in a labyrinth shape by the horizontal ring-shaped ventilation groove 18 and the vertical notch 19 so that the air moves horizontally and moves in the filler neck length direction (vertical direction). Since it flows while repeating, the dust damming effect becomes remarkable.

さらに、 各シール部１７…がフィラーネック外周面に対し先端がラップする状態で密着するため、単に接触させる場合と比較して、シール効果が高くなり、細かいダストでも漏らさず、かつ、長期に亘って確実にせき止めることができる。   Further, since each seal portion 17 is in close contact with the filler neck outer peripheral surface in a state where the tip wraps, the sealing effect is enhanced as compared with the case of simply contacting, and fine dust does not leak, and for a long time. Can be surely stopped.

図６に、キャップカバー１５によるダストせき止め効果に関して本発明者が行った実験結果を示す。   FIG. 6 shows the results of experiments conducted by the present inventor regarding the dust damming effect of the cap cover 15.

実験は、図示のようにキャップカバー無し(図８，９の従来の給油口構造)のＡ、シール部無しのキャップカバーを設けたＢ、第１実施形態のシール部付きキャップカバー(シール部先端を１．０ｍｍラップ)を設けたＣ、シール部付きではあるが先端がフィラーネック外周面にラップしないキャップカバーを設けたＤの４タイプの給油口構造を披験体として、ダスト詰まりを人為的に発生させる加速試験、具体的にはダストが浮遊している空気をタンクに吸入させた後、真空ポンプにてタンク内の空気をＭＡＸ３リットル／ｍｉｎで吸出し、タンク内圧が−１０．１ｋＰａに達する時間を通気穴の詰まり時間として計測する方式で行った。   As shown in the figure, A is a cap cover without the cap cover (conventional oil supply port structure shown in FIGS. 8 and 9), B is a cap cover without a seal portion, and the cap cover with a seal portion according to the first embodiment (tip of the seal portion). D. Clogging with a 1.0 mm wrap) and D with a cap cover that has a seal part but the tip does not wrap around the filler neck outer peripheral surface. Acceleration test to be generated, specifically, the air in which dust is floating is sucked into the tank, then the air in the tank is sucked out at MAX 3 liters / min with a vacuum pump, and the tank internal pressure reaches -10.1 kPa. The time was measured by measuring the time as clogging of the vent hole.

この結果、第１実施形態に係るタイプＣの詰まり時間が、キャップカバー無しのタイプＡの約１１倍となり、ダスト詰まり防止効果が顕著に現れた。   As a result, the clogging time of Type C according to the first embodiment is about 11 times that of Type A without the cap cover, and the dust clogging prevention effect is noticeable.

また、シール部をラップさせないタイプＤでも、タイプＣよりは劣るものの、タイプＡ，Ｂと比較してダスト詰まり防止効果が得られることが明らかとなった。   Further, it has been clarified that, even in the type D where the seal portion is not wrapped, the dust clogging preventing effect is obtained as compared with the types A and B, although it is inferior to the type C.

なお、図６において各タイプＡ〜Ｄのハッチング及び各部の符号を省略している。   In FIG. 6, the hatching of each type A to D and the reference numerals of the respective parts are omitted.

一方、この給油口構造によると、給油キャップ１３に別体のキャップカバー１５を被せる構成であるため、既存の給油キャップ付きタンクに必要に応じて後付けで対応することができる。   On the other hand, according to this fuel filler opening structure, since the oil cap 13 is covered with a separate cap cover 15, an existing tank with a fuel cap can be retrofitted as necessary.

すなわち、ダストが多くてダスト詰まりやダスト混入のおそれの高い現場で使用される機械のタンクのみに、オプションとして既設の給油キャップ１３にこのキャップカバー１５を後付けすればよい。   In other words, this cap cover 15 may be retrofitted as an option to an existing oiling cap 13 only in a tank of a machine used at a site where there is a high risk of dust clogging or dust mixing.

このため、給油キャップ自体を取り替える場合と比較して、コスト、管理の面で有利となる。   For this reason, it becomes advantageous in terms of cost and management as compared with the case of replacing the fuel cap itself.

第２実施形態(図７参照)
第１実施形態との相違点のみを説明する。 Second embodiment (see FIG. 7)
Only differences from the first embodiment will be described.

第２実施形態においては、キャップカバー１５の各シール部２１がねじ山状に連続して設けられ、シール部間に螺旋状の通気溝２２が形成されている。   In the second embodiment, each seal portion 21 of the cap cover 15 is provided continuously in a thread shape, and a spiral ventilation groove 22 is formed between the seal portions.

この実施形態の場合、この螺旋状の通気溝２２がそのまま通気路となり、図示のように空気の流れは単純な螺旋流となる。   In the case of this embodiment, this spiral ventilation groove 22 becomes the ventilation path as it is, and the air flow becomes a simple spiral flow as shown in the figure.

このため、ダストはこの螺旋流に乗って通気路内をある程度の深さまで移動するが、基本的にシール部２１が障壁となる点は第１実施形態と変わらないため、通気穴(ここでは図示しない)のダスト詰まり及びダストのタンク内への侵入を防止する点で十分な効果を得ることができる。   For this reason, the dust rides on this spiral flow and moves to a certain depth in the air passage, but basically the point that the seal portion 21 becomes a barrier is not different from that in the first embodiment. A sufficient effect in terms of preventing dust clogging and intrusion of dust into the tank.

ところで、上記実施形態では、内周にＬ字形の通気穴１４を備えた、最も単純な構成の給油キャップ１３を例示したが、本発明はどのような構成であれ通気穴を備えた給油キャップにも適用することができる。   By the way, in the said embodiment, although the oil supply cap 13 of the simplest structure provided with the L-shaped ventilation hole 14 in the inner periphery was illustrated, this invention is an oil supply cap provided with the ventilation hole whatever the structure. Can also be applied.

また、本発明は油圧ショベルの燃料タンクに限らず、他の建設機械の燃料タンクにも適用することができる。また、燃料タンクに限らず、フィラーネックに通気穴付きの給油キャップが設けられた各種油タンクに適用することができる。   Further, the present invention can be applied not only to a fuel tank of a hydraulic excavator but also to a fuel tank of another construction machine. Further, the present invention can be applied not only to the fuel tank but also to various oil tanks in which a filler cap with a vent hole is provided in the filler neck.

１１ 燃料タンク
１２ フィラーネック
１３ 給油キャップ
１４ 通気穴
１５ 給油キャップカバー
１６ カバー本体
１７ シール部
１８ 通気溝
１９ 切欠
２０ 通気路
２１ シール部
２２ 通気溝(通気路) DESCRIPTION OF SYMBOLS 11 Fuel tank 12 Filler neck 13 Refueling cap 14 Ventilation hole 15 Refueling cap cover 16 Cover main body 17 Seal part 18 Ventilation groove 19 Notch 20 Ventilation path 21 Sealing part 22 Ventilation groove (ventilation path)

Claims (5)

タンクのフィラーネックに給油キャップが設けられ、この給油キャップに外気導入用の通気穴が設けられたタンクの給油口構造において、
(Ａ) 上記給油キャップにゴム等の弾性材料からなる給油キャップカバーが被嵌され、
(Ｂ) この給油キャップカバーは、上記給油キャップと上記フィラーネックとを覆うカバー本体と、このカバー本体における上記フィラーネックを覆う部分の内周に同本体高さ方向の複数個所に内向きに突設されて上記フィラーネックの外周面に密着するリング状のシール部とを備え、
(Ｃ) このシール部は、空気をフィラーネック周りで旋回させながら同カバー先端開口と上記通気穴との間で移動させる通気路が形成される状態で設けられた
ことを特徴とするタンクの給油口構造。 In the tank filler opening structure of the tank in which a filler cap is provided in the filler neck of the tank, and a vent hole for introducing outside air is provided in the filler cap.
(A) An oil supply cap cover made of an elastic material such as rubber is fitted on the oil supply cap,
(B) The fuel cap cover protrudes inward at a plurality of locations in the height direction of the main body of the cover body covering the fuel cap and the filler neck, and the inner periphery of the cover body covering the filler neck. A ring-shaped seal portion that is provided and is in close contact with the outer peripheral surface of the filler neck,
(C) This seal portion is provided in a state where an air passage is formed in which air is moved between the opening at the front end of the cover and the vent hole while air is swirled around the filler neck. Mouth structure. 上記各シール部は、隣り合うもの同士間に通気溝が形成される状態で独立して平行に設けられ、各シール部の周方向の一部に通気溝同士を連通させる切欠が、交互に周方向に位置ずれして設けられることによって上記通気路が形成されたことを特徴とする請求項１記載のタンクの給油口構造。   Each of the seal portions is provided independently and in parallel in a state where a ventilation groove is formed between adjacent ones, and a notch for communicating the ventilation grooves with a part of the circumferential direction of each seal portion is alternately surrounded. 2. The tank filler structure according to claim 1, wherein the air passage is formed by being displaced in a direction. 上記各シール部は、隣り合うもの同士間に通気路としての螺旋状の通気溝が形成される状態でねじ山状に連続して設けられたことを特徴とする請求項１記載のタンクの給油口構造。   2. The tank oil supply according to claim 1, wherein each of the seal portions is continuously provided in a thread shape in a state in which a spiral ventilation groove as a ventilation path is formed between adjacent ones. Mouth structure. 上記各シール部は、先端がフィラーネック外周面にラップ状態で密着し得る突出寸法をもって設けられたことを特徴とする請求項２または３記載のタンクの給油口構造。   4. The tank filler structure according to claim 2, wherein each of the seal portions is provided with a projecting dimension such that a tip of the seal portion can be in close contact with the outer peripheral surface of the filler neck in a lapped state. ゴム等の弾性材料により、タンクのフィラーネックに設けられた給油キャップに被嵌される形状に形成され、内周における高さ方向の複数個所に、被嵌状態で上記フィラーネックの外周面に密着するリング状のシール部を備え、このシール部は、空気をフィラーネック周りで旋回させながら、同カバー先端開口と上記給油キャップに設けられた外気導入用の通気穴との間で移動させる通気路が形成される状態で設けられたことを特徴とするタンクの給油キャップカバー。   It is formed by rubber or other elastic material so that it can be fitted to the oil filler cap provided on the filler neck of the tank, and is in close contact with the outer peripheral surface of the filler neck in several places in the height direction on the inner circumference. An air passage that moves between the opening at the front end of the cover and the vent hole for introducing outside air provided in the fuel filler cap while swirling the air around the filler neck. An oil supply cap cover for a tank, which is provided in a state where is formed.
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JP2019123375A (en) * 2018-01-17 2019-07-25 トヨタ自動車株式会社 Cap for receptacle and vehicle
JP7027900B2 (en) 2018-01-17 2022-03-02 トヨタ自動車株式会社 Receptacle caps and vehicles

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