JP2021004583A - Fuel tank and support member - Google Patents

Fuel tank and support member Download PDF

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JP2021004583A
JP2021004583A JP2019119310A JP2019119310A JP2021004583A JP 2021004583 A JP2021004583 A JP 2021004583A JP 2019119310 A JP2019119310 A JP 2019119310A JP 2019119310 A JP2019119310 A JP 2019119310A JP 2021004583 A JP2021004583 A JP 2021004583A
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plate
wall portion
groove
tank body
welding
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JP7349825B2 (en
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悠 小原
Yu Obara
悠 小原
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FTS Co Ltd
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Abstract

To stabilize quality of a fuel tank.SOLUTION: A fuel tank 10 comprises a tank body 11 made of synthetic resin, and a strut member 20 made of synthetic resin housed in the tank body 11. The strut member 20 is formed with an annular flange part 22 welded to a lower wall part 13 and an upper wall part 14 of the tank body 11. A groove part 26 in a circumferential direction is formed on a surface 25 of the flange part 22 facing the upper wall part 14 and the lower wall part 13. The strut member 20 comprises a ventilation part 29 that communicates the inside of the groove part 26 with the outside of the strut member 20.SELECTED DRAWING: Figure 2

Description

本発明は、燃料タンク及び支柱部材に関するものである。 The present invention relates to a fuel tank and a strut member.

特許文献１には、内圧の変動に起因する変形を防止することが可能な合成樹脂製の燃料タンクが開示されている。この燃料タンクは、タンクを構成する上下両壁部の間に、合成樹脂材料からなるコラム状の支持エレメントを介在させたものである。支持エレメントの上下両端面は、タンクの上下両壁部に溶接により固着されている。 Patent Document 1 discloses a fuel tank made of synthetic resin capable of preventing deformation due to fluctuations in internal pressure. In this fuel tank, a column-shaped support element made of a synthetic resin material is interposed between the upper and lower wall portions constituting the tank. The upper and lower ends of the support element are fixed to the upper and lower walls of the tank by welding.

特表２０１６−５０６３３１号公報Special Table 2016-506331

支持エレメントの上下両端面はフランジ状の板部となっている。溶接の際には、フランジ状の板部を、加熱して軟化させた状態でタンクの上下両壁部に押し付け、板部と壁部を面接触状態で密着させる。板部を加熱してからタンクの壁部に押し付けるまでの間に、板部の温度が低下するのに伴って、板部が湾曲するように変形する。そのため、板部と壁部との間に、空気が閉じ込められ、空気溜まりが発生する。板部と壁部との間に空気溜まりが生じると、その分、板部と壁部の密着面積が減少するのである。ところが、軟化して湾曲したときの板部の形状は、雰囲気温度等の諸条件によってバラツキがあるため、板部と壁部の密着面積が一定にならない。このように、上記従来の燃料タンクは、板部と壁部の密着面積を管理することができないので、品質が安定しないという問題がある。 The upper and lower ends of the support element are flange-shaped plates. At the time of welding, the flange-shaped plate portion is pressed against the upper and lower wall portions of the tank in a state of being softened by heating, and the plate portion and the wall portion are brought into close contact with each other in a surface contact state. During the period from heating the plate to pressing it against the wall of the tank, the plate is deformed so as to be curved as the temperature of the plate decreases. Therefore, air is trapped between the plate portion and the wall portion, and an air pool is generated. When an air pool is generated between the plate portion and the wall portion, the contact area between the plate portion and the wall portion is reduced by that amount. However, the shape of the plate portion when it is softened and curved varies depending on various conditions such as atmospheric temperature, so that the contact area between the plate portion and the wall portion is not constant. As described above, the conventional fuel tank has a problem that the quality is not stable because the contact area between the plate portion and the wall portion cannot be controlled.

本発明は上記のような事情に基づいて完成されたものであって、燃料タンクの品質の安定を図ることを目的とする。 The present invention has been completed based on the above circumstances, and an object of the present invention is to stabilize the quality of the fuel tank.

第１の発明の燃料タンクは、
合成樹脂製のタンク本体と、
前記タンク本体内に収容された合成樹脂製の支柱部材と、
前記支柱部材に形成され、前記タンク本体の壁部に溶着された環状のフランジ部と、
前記フランジ部における前記壁部との対向面に形成された周方向の溝部と、
前記溝部内と前記支柱部材の外部とを連通させる通気部とを備えている。 The fuel tank of the first invention
The tank body made of synthetic resin and
A strut member made of synthetic resin housed in the tank body and
An annular flange portion formed on the support column member and welded to the wall portion of the tank body,
A groove portion in the circumferential direction formed on the surface of the flange portion facing the wall portion and
It is provided with a ventilation portion that communicates the inside of the groove portion with the outside of the support column member.

第２の発明の支柱部材は、
合成樹脂製のタンク本体内に収容され、燃料タンクを構成する合成樹脂製の支柱部材であって、
前記タンク本体の壁部に溶着される環状のフランジ部と、
前記フランジ部における前記壁部との対向面に形成された周方向の溝部と、
前記溝部内を外部に連通させる通気部とを備えている。 The strut member of the second invention is
It is a support member made of synthetic resin that is housed in the tank body made of synthetic resin and constitutes a fuel tank.
An annular flange portion welded to the wall portion of the tank body and
A groove portion in the circumferential direction formed on the surface of the flange portion facing the wall portion and
It is provided with a ventilation portion that communicates the inside of the groove portion with the outside.

支柱部材をタンク本体の壁部に溶着する際には、フランジ部を、加熱して軟化させた状態で壁部に押し付ける。溶着の過程では、フランジ部と壁部との間に空気溜まりが生じても、溶着が進むのに伴って、空気溜まりの空気が溝部と通気部を通って支柱部材の外部へ排出される。これにより、溶着完了時には、フランジ部と壁部との間において溝部だけに空気を残留させる形態にすることが可能である。溝部の大きさは、支柱部材の成形時に管理され、フランジ部が湾曲しても大きく変動することはない。これにより、フランジ部と壁部の溶着面積を管理することができるので、溶着品質を安定させることができる。 When the support column member is welded to the wall portion of the tank body, the flange portion is pressed against the wall portion in a state of being heated and softened. In the process of welding, even if an air pool is formed between the flange portion and the wall portion, the air in the air pool is discharged to the outside of the support column member through the groove portion and the ventilation portion as the welding progresses. As a result, when the welding is completed, it is possible to form a form in which air remains only in the groove portion between the flange portion and the wall portion. The size of the groove portion is controlled at the time of molding the strut member, and does not fluctuate significantly even if the flange portion is curved. As a result, the welding area of the flange portion and the wall portion can be controlled, so that the welding quality can be stabilized.

実施例１の燃料タンクの断面図である。It is sectional drawing of the fuel tank of Example 1. FIG. 支柱部材とタンク本体の下壁部との溶着部分をあらわした部分拡大断面図である。It is a partial enlarged sectional view showing the welded part between the support column member and the lower wall part of a tank body. 図２のＸ−Ｘ線断面図である。FIG. 2 is a cross-sectional view taken along line XX of FIG. フランジ部を熱板により加熱している状態をあらわす部分拡大断面図である。It is a partial enlarged sectional view which shows the state which the flange part is heated by a hot plate. フランジ部が加熱により軟化して湾曲変形した状態をあらわす部分拡大断面図である。It is a partially enlarged cross-sectional view which shows the state which the flange part softened by heating and was curved and deformed. 実施例２の支柱部材の底面図である。It is a bottom view of the support column member of Example 2. 実施例３の支柱部材の底面図である。It is a bottom view of the support column member of Example 3. 実施例４の支柱部材の底面図である。It is a bottom view of the support column member of Example 4.

第１及び第２の発明は、前記溝部が、前記フランジ部の全周にわたって連続した形態であることが好ましい。この構成によれば、フランジ部と壁部との溶着面積を、フランジ部の全周にわたって管理できるので、溶着品質を高いレベルで安定させることができる。 In the first and second inventions, it is preferable that the groove portion is continuous over the entire circumference of the flange portion. According to this configuration, the welding area between the flange portion and the wall portion can be controlled over the entire circumference of the flange portion, so that the welding quality can be stabilized at a high level.

第１及び第２の発明は、前記通気部が、前記フランジ部を厚さ方向に貫通した形態であることが好ましい。この構成によれば、通気部を形成しても、フランジ部における壁部との溶着面積が減少することがないので、溶着強度の低下を回避できる。 In the first and second inventions, it is preferable that the ventilation portion penetrates the flange portion in the thickness direction. According to this configuration, even if the ventilation portion is formed, the welding area of the flange portion with the wall portion does not decrease, so that a decrease in welding strength can be avoided.

＜実施例１＞
以下、本発明を具体化した実施例１を図１〜図５を参照して説明する。本実施例１の燃料タンク１０は、図１に示すように、合成樹脂製のタンク本体１１と、タンク本体１１内に収容された合成樹脂製の支柱部材２０とを備えている。即ち、本実施例１の支柱部材２０は、タンク本体１１内に収容されることで燃料タンク１０を構成するものである。 <Example 1>
Hereinafter, Example 1 embodying the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the fuel tank 10 of the first embodiment includes a tank body 11 made of synthetic resin and a support member 20 made of synthetic resin housed in the tank body 11. That is, the support column member 20 of the first embodiment constitutes the fuel tank 10 by being housed in the tank body 11.

タンク本体１１の内部空間は、燃料を貯留するための貯留室１２となっている。タンク本体１１は、下壁部１３（請求項に記載の壁部）と、貯留室１２を構成する上壁部１４（請求項に記載の壁部）とを有している。上壁部１４と下壁部１３は、上下方向に対向するように配されている。貯留室１２（タンク本体１１）の内圧が大気圧よりも上昇すると、上壁部１４と下壁部１３は、タンク本体１１内から互いに上下方向に離間する方向の押圧力を受ける。貯留室１２の内圧が大気圧よりも低下すると、上壁部１４と下壁部１３は、タンク本体１１外から互いに上下方向に接近する方向の押圧力を受ける。 The internal space of the tank body 11 is a storage chamber 12 for storing fuel. The tank main body 11 has a lower wall portion 13 (wall portion according to claim) and an upper wall portion 14 (wall portion according to claim) constituting the storage chamber 12. The upper wall portion 14 and the lower wall portion 13 are arranged so as to face each other in the vertical direction. When the internal pressure of the storage chamber 12 (tank body 11) rises above the atmospheric pressure, the upper wall portion 14 and the lower wall portion 13 receive a pressing force in a direction in which they are separated from each other in the vertical direction from the inside of the tank body 11. When the internal pressure of the storage chamber 12 becomes lower than the atmospheric pressure, the upper wall portion 14 and the lower wall portion 13 receive a pressing force in a direction approaching each other in the vertical direction from the outside of the tank body 11.

支柱部材２０の材料は、タンク本体１１と同じものである。支柱部材２０は、貯留室１２の圧力が変動したときに上壁部１４と下壁部１３の上下方向の相対変位を規制し、タンク本体１１の不正な変形を防止するものである。支柱部材２０は、軸線を上下方向（上壁部１４と下壁部１３が対向する方向）に向けた円筒状の柱状部２１と、柱状部２１の上下両端部に連なる上下対称な一対のフランジ部２２とを有する単一部品である。 The material of the support column member 20 is the same as that of the tank body 11. The strut member 20 regulates the relative displacement of the upper wall portion 14 and the lower wall portion 13 in the vertical direction when the pressure of the storage chamber 12 fluctuates, and prevents the tank body 11 from being deformed illegally. The strut member 20 has a cylindrical columnar portion 21 whose axis is directed in the vertical direction (the direction in which the upper wall portion 14 and the lower wall portion 13 face each other) and a pair of vertically symmetrical flanges connected to both upper and lower ends of the columnar portion 21. It is a single component having a portion 22.

一対のフランジ部２２は上下対称であるので、以下、下側のフランジ部２２の形態について説明し、上側のフランジ部２２については説明を省略する。フランジ部２２は、柱状部２１の下端部の外周から径方向（水平方向）へ張り出している。図３に示すように、支柱部材２０を柱状部２１の軸線と平行に上から視た平面視において、フランジ部２２は、外径寸法が柱状部２１よりも大きく、柱状部２１と同心の円環形をなしている。フランジ部２２は、柱状部２１と同心円環状のテーパ部２３と、同じく柱状部２１と同心円環状の板状溶着部２４とから構成されている。テーパ部２３は、柱状部２１の下端部から、柱状部２１の軸線に対して斜め方向（斜め下外方）へ延出した形態である。 Since the pair of flange portions 22 are vertically symmetrical, the form of the lower flange portion 22 will be described below, and the description of the upper flange portion 22 will be omitted. The flange portion 22 projects in the radial direction (horizontal direction) from the outer circumference of the lower end portion of the columnar portion 21. As shown in FIG. 3, when the support column member 20 is viewed from above in parallel with the axis of the columnar portion 21, the flange portion 22 has an outer diameter larger than that of the columnar portion 21 and is a circle concentric with the columnar portion 21. It has a ring shape. The flange portion 22 is composed of a columnar portion 21, a concentric annular tapered portion 23, and a columnar portion 21 and a concentric annular plate-shaped welded portion 24. The tapered portion 23 extends from the lower end of the columnar portion 21 in an oblique direction (obliquely downward and outward) with respect to the axis of the columnar portion 21.

板状溶着部２４は、テーパ部２３よりも大径であり、テーパ部２３の外周縁（下端縁部）から径方向外方へ水平に張り出した形態である。板状溶着部２４は、板厚方向を柱状部２１の軸線と平行に向けている。板状溶着部２４の下面は、下壁部１３の内面と対向する対向面２５となっている。支柱部材２０は、対向面２５において下壁部１３と溶着する。 The plate-shaped welded portion 24 has a larger diameter than the tapered portion 23, and is in a form of horizontally projecting outward in the radial direction from the outer peripheral edge (lower end edge portion) of the tapered portion 23. The plate-shaped welded portion 24 has the plate thickness direction oriented parallel to the axis of the columnar portion 21. The lower surface of the plate-shaped welded portion 24 is an opposing surface 25 facing the inner surface of the lower wall portion 13. The strut member 20 is welded to the lower wall portion 13 on the facing surface 25.

板状溶着部２４には、対向面２５を凹ませた形態の溝部２６が形成されている。支柱部材２０を軸線と平行に切断した断面において、溝部２６の断面形状は方形である。溝部２６は、フランジ部２２（板状溶着部２４）と同心の円環形をなす。溝部２６は、板状溶着部２４の外周縁よりも径方向内側で、且つ板状溶着部２４の内周縁より径方向外側に配されている。対向面２５のうち溝部２６よりも外周側の円環状領域は、外周側溶着面２７となっている。対向面２５のうち溝部２６よりも内周側の円環状領域は、内周側溶着面２８となっている。 The plate-shaped welded portion 24 is formed with a groove portion 26 in which the facing surface 25 is recessed. In the cross section of the support column member 20 cut in parallel with the axis, the cross-sectional shape of the groove portion 26 is square. The groove portion 26 has an annular shape concentric with the flange portion 22 (plate-shaped welded portion 24). The groove portion 26 is arranged radially inside the outer peripheral edge of the plate-shaped welded portion 24 and radially outward from the inner peripheral edge of the plate-shaped welded portion 24. Of the facing surfaces 25, the annular region on the outer peripheral side of the groove portion 26 is the outer peripheral side welding surface 27. Of the facing surfaces 25, the annular region on the inner peripheral side of the groove portion 26 is the inner peripheral side welding surface 28.

板状溶着部２４には、４つ（複数）の通気部２９（通気孔）が形成されている。４つの通気部２９は、円形の貫通孔からなり、平面視において周方向に等角度ピッチで配されている。径方向において、４つの通気部２９は、溝部２６の形成領域の範囲内に配されている。各通気部２９は、溝部２６の内部空間を、板状溶着部２４の上面、即ち板状溶着部２４における対向面２５とは反対側の外面へ開放させた形態である。換言すると、通気部２９は、板状溶着部２４を支柱部材２０（柱状部２１）の軸線方向と平行に貫通した形態であり、板状溶着部２４（フランジ部２２）の板厚方向に貫通した形態である。 Four (plurality) ventilation portions 29 (vent holes) are formed in the plate-shaped welding portion 24. The four vents 29 are formed of circular through holes and are arranged at equal pitches in the circumferential direction in a plan view. In the radial direction, the four vents 29 are arranged within the formation region of the groove 26. Each ventilation portion 29 has a form in which the internal space of the groove portion 26 is opened to the upper surface of the plate-shaped welding portion 24, that is, the outer surface of the plate-shaped welding portion 24 opposite to the facing surface 25. In other words, the ventilation portion 29 has a form in which the plate-shaped welded portion 24 penetrates in parallel with the axial direction of the support column member 20 (columnar portion 21), and penetrates in the plate thickness direction of the plate-shaped welded portion 24 (flange portion 22). It is a form that has been used.

次に、支柱部材２０を下壁部１３に溶着する工程を説明する。まず、図４に示すように、水平に設置した熱板Ｈの上面に、下側のフランジ部２２における下壁部１３との対向面２５（外周側溶着面２７と内周側溶着面２８）を面接触状態で密着させながら押し付ける。すると、フランジ部２２のうち外周側溶着面２７と内周側溶着面２８を含む板状溶着部２４の下面部分が、加熱されて軟化する。このとき、板状溶着部２４のうち対向面２５（外周側溶着面２７と内周側溶着面２８）から離間した上面側部分は、温度上昇が小さいので軟化しない。したがって、溝部２６のうち上端側部分も軟化しない。タンク本体１１の下壁部１３のうちフランジ部２２を溶着する部位も、フランジ部２２と同様に、加熱して軟化させておく。 Next, a step of welding the support column member 20 to the lower wall portion 13 will be described. First, as shown in FIG. 4, on the upper surface of the horizontally installed hot plate H, the facing surface 25 of the lower flange portion 22 with the lower wall portion 13 (outer peripheral side welding surface 27 and inner peripheral side welding surface 28). Press while keeping close contact with each other. Then, the lower surface portion of the plate-shaped welded portion 24 including the outer peripheral side welded surface 27 and the inner peripheral side welded surface 28 of the flange portion 22 is heated and softened. At this time, the upper surface side portion of the plate-shaped welded portion 24 separated from the facing surface 25 (the outer peripheral side welding surface 27 and the inner peripheral side welding surface 28) does not soften because the temperature rise is small. Therefore, the upper end side portion of the groove portion 26 is not softened either. The portion of the lower wall portion 13 of the tank body 11 to which the flange portion 22 is welded is also heated and softened in the same manner as the flange portion 22.

板状溶着部２４の下面側部分と下壁部１３が軟化したら、支柱部材２０を、熱板Ｈから持ち上げて、下壁部１３の上方へ移動させる。移動させる間に、板状溶着部２４は雰囲気温度によって自然冷却されるため、板状溶着部２４（フランジ部２２）の対向面２５は湾曲変形する。図５に示すように、湾曲変形した対向面２５は、溝部２６の形成されている径方向中央部分が、外周側部分及び内周側部分に比べて凹んだ形態となる。このような凹み形状になるのは、以下の理由によるものと推察される。 When the lower surface side portion and the lower wall portion 13 of the plate-shaped welded portion 24 are softened, the support column member 20 is lifted from the hot plate H and moved above the lower wall portion 13. Since the plate-shaped welded portion 24 is naturally cooled by the atmospheric temperature during the movement, the facing surface 25 of the plate-shaped welded portion 24 (flange portion 22) is curved and deformed. As shown in FIG. 5, the curved and deformed facing surface 25 has a shape in which the central portion in the radial direction in which the groove portion 26 is formed is recessed as compared with the outer peripheral side portion and the inner peripheral side portion. It is presumed that such a concave shape is due to the following reasons.

板状溶着部２４のうち外周側溶着面２７が形成されている領域は、板状溶着部２４の外周面が露出しているので冷却速度が比較的速く、冷却に伴う収縮量が比較的小さい。板状溶着部２４のうち内周側溶着面２８が形成されている領域も、板状溶着部２４の内周面が露出しているので冷却速度が比較的速く、冷却に伴う収縮量が比較的小さい。これに対し、板状溶着部２４のうち溝部２６が形成されている領域は、そもそも加熱の度合いが小さく、しかも、周面が露出していないので冷却速度が比較的遅く、冷却に伴う収縮量が比較的大きい。この冷却に伴う各部位における変形形態の相違により、対向面２５のうち溝部２６が形成されている径方向中央部が、外周側及び内周側に比べて凹むような形態で湾曲すると考えられる。 In the region of the plate-shaped welded portion 24 on which the outer peripheral side welding surface 27 is formed, the outer peripheral surface of the plate-shaped welded portion 24 is exposed, so that the cooling rate is relatively high and the amount of shrinkage due to cooling is relatively small. .. In the region of the plate-shaped welded portion 24 where the inner peripheral side welding surface 28 is formed, the cooling rate is relatively fast because the inner peripheral surface of the plate-shaped welded portion 24 is exposed, and the amount of shrinkage due to cooling is compared. Small. On the other hand, in the region of the plate-shaped welded portion 24 where the groove portion 26 is formed, the degree of heating is small in the first place, and since the peripheral surface is not exposed, the cooling rate is relatively slow, and the amount of shrinkage due to cooling is relatively slow. Is relatively large. It is considered that the radial central portion of the facing surface 25 in which the groove portion 26 is formed is curved in a concave shape as compared with the outer peripheral side and the inner peripheral side due to the difference in the deformation form in each portion due to the cooling.

上記のように湾曲変形した対向面２５を下壁部１３に押し付ける過程では、まず、板状溶着部２４ののうち外周縁部と内周縁部が下壁部１３に接触するので、下壁部１３と板状溶着部２４との間には空気が閉じこめられ、周方向に沿った環状の空気溜まり（図示省略）が発生する。この空気溜まりは溝部２６に連通している。この状態から板状溶着部２４を下壁部１３に更に押し付けると、対向面２５が全体的に下壁部１３に接近していき、これに伴って、空気溜まり内の空気が、溝部２６と通気部２９を介して板状溶着部２４（支柱部材２０）の外部へ押し出される。 In the process of pressing the curved and deformed facing surface 25 against the lower wall portion 13 as described above, first, the outer peripheral edge portion and the inner peripheral edge portion of the plate-shaped welded portion 24 come into contact with the lower wall portion 13, so that the lower wall portion Air is confined between the 13 and the plate-shaped welded portion 24, and an annular air pool (not shown) is generated along the circumferential direction. This air pool communicates with the groove 26. When the plate-shaped welded portion 24 is further pressed against the lower wall portion 13 from this state, the facing surface 25 approaches the lower wall portion 13 as a whole, and the air in the air pool becomes the groove portion 26. It is pushed out of the plate-shaped welded portion 24 (support member 20) via the vented portion 29.

この間、板状溶着部２４の対向面２５のうち外周縁部と内周縁部は下壁部１３に密着した状態を保つ。そして、対向面２５における下壁部１３との接触領域が、外周縁側から溝部２６に向かって径方向中央部側（径方向内側）へ拡大するとともに、内周縁側から溝部２６に向かって径方向中央部側（径方向外側）へ拡大していく。つまり、板状溶着部２４と下壁部１３との密着面積は、フランジ部２２を下壁部１３に押し付けていくのに伴って確実に増大していく。 During this time, the outer peripheral edge portion and the inner peripheral edge portion of the facing surface 25 of the plate-shaped welded portion 24 are kept in close contact with the lower wall portion 13. Then, the contact region of the facing surface 25 with the lower wall portion 13 expands from the outer peripheral edge side toward the groove portion 26 toward the radial center portion side (diameter inside), and from the inner peripheral edge side toward the groove portion 26 in the radial direction. It expands toward the center (outward in the radial direction). That is, the contact area between the plate-shaped welded portion 24 and the lower wall portion 13 surely increases as the flange portion 22 is pressed against the lower wall portion 13.

そして、外周側溶着面２７の全領域と内周側溶着面２８の全領域が下壁部１３に密着した状態になると、下側のフランジ部２２（板状溶着部２４）と下壁部１３との溶着が完了する。この状態では、板状溶着部２４のうち下壁部１３に溶着すべき所期の領域（外周側溶着面２７と内周側溶着面２８）の全領域が、確実に下壁部１３に溶着されているので、必要最少の溶着面積が確保されている。また、板状溶着部２４のうち溝部２６を構成する部位の大部分は、熱板Ｈから遠い位置にあるので、溝部２６は殆ど変形せず、溝部２６の径方向の溝幅寸法も溶着によって大きく変動していない。したがって、フランジ部２２と下壁部１３との溶着面積は、所期の面積が確保されている。下側のフランジ部２２と同様の手順で、上側のフランジ部２２と上壁部１４との溶着も行われる。 Then, when the entire region of the outer peripheral side welding surface 27 and the entire region of the inner peripheral side welding surface 28 are in close contact with the lower wall portion 13, the lower flange portion 22 (plate-shaped welding portion 24) and the lower wall portion 13 are brought into close contact with each other. Welding with is completed. In this state, the entire area of the plate-shaped welded portion 24 that should be welded to the lower wall portion 13 (the outer peripheral side welded surface 27 and the inner peripheral side welded surface 28) is surely welded to the lower wall portion 13. Therefore, the minimum required welding area is secured. Further, since most of the portions constituting the groove portion 26 of the plate-shaped welded portion 24 are located far from the hot plate H, the groove portion 26 is hardly deformed, and the groove width dimension in the radial direction of the groove portion 26 is also formed by welding. It has not changed significantly. Therefore, the desired area is secured for the welded area between the flange portion 22 and the lower wall portion 13. Welding of the upper flange portion 22 and the upper wall portion 14 is also performed in the same procedure as the lower flange portion 22.

上述のように本実施例１の燃料タンク１０は、合成樹脂製のタンク本体１１と、タンク本体１１内に収容された合成樹脂製の支柱部材２０とを有している。支柱部材２０には、タンク本体１１の下壁部１３及び上に溶着された環状のフランジ部２２が形成されている。フランジ部２２における下壁部１３及び上壁部１４との対向面２５には、周方向の溝部２６が形成されている。支柱部材２０（フランジ部２２）には、溝部２６内と支柱部材２０の外部とを連通させる通気部２９が形成されている。 As described above, the fuel tank 10 of the first embodiment has a tank body 11 made of synthetic resin and a support member 20 made of synthetic resin housed in the tank body 11. The strut member 20 is formed with a lower wall portion 13 of the tank body 11 and an annular flange portion 22 welded onto the tank body 11. A groove portion 26 in the circumferential direction is formed on the surface 25 of the flange portion 22 facing the lower wall portion 13 and the upper wall portion 14. The strut member 20 (flange portion 22) is formed with a ventilation portion 29 that communicates the inside of the groove portion 26 with the outside of the strut member 20.

支柱部材２０をタンク本体１１の下壁部１３及び上壁部１４に溶着する際には、フランジ部２２（板状溶着部２４）を、加熱して軟化させた状態で下壁部１３又は上壁部１４に押し付ける。溶着の過程では、フランジ部２２と下壁部１３又は上壁部１４との間に空気溜まりが生じても、溶着が進むのに伴って、空気溜まりの空気は溝部２６と通気部２９を通って支柱部材２０の外部へ排出される。 When the support column member 20 is welded to the lower wall portion 13 and the upper wall portion 14 of the tank body 11, the flange portion 22 (plate-shaped welded portion 24) is heated and softened to be the lower wall portion 13 or the upper wall portion 13. Press against the wall 14. In the process of welding, even if an air pool is generated between the flange portion 22 and the lower wall portion 13 or the upper wall portion 14, the air in the air pool passes through the groove portion 26 and the ventilation portion 29 as the welding progresses. Is discharged to the outside of the support column member 20.

これにより、溶着完了時には、フランジ部２２と壁部との間において溝部２６だけに空気を残留させる形態にすることが可能である。溝部２６の大きさは、支柱部材２０の成形時に管理され、フランジ部２２が湾曲変形しても大きく変動することはない。このように本実施例１の燃料タンク１０及び支柱部材２０によれば、フランジ部２２と壁部との溶着面積を管理することができるので、溶着品質を安定させることができる。 Thereby, when the welding is completed, it is possible to form a form in which air remains only in the groove portion 26 between the flange portion 22 and the wall portion. The size of the groove portion 26 is controlled at the time of molding the strut member 20, and does not fluctuate significantly even if the flange portion 22 is curved and deformed. As described above, according to the fuel tank 10 and the support column member 20 of the first embodiment, the welding area between the flange portion 22 and the wall portion can be controlled, so that the welding quality can be stabilized.

また、溝部２６はフランジ部２２の全周にわたって連続した形態であるから、板状溶着部２４と下壁部１３との間には、管理できない形態の空気溜まりが生じることがない。したがって、フランジ部２２と壁部との溶着面積を、フランジ部２２の全周にわたって管理することができるので、溶着品質を高いレベルで安定させることができる。 Further, since the groove portion 26 has a continuous shape over the entire circumference of the flange portion 22, an uncontrollable form of air pool does not occur between the plate-shaped welded portion 24 and the lower wall portion 13. Therefore, the welding area between the flange portion 22 and the wall portion can be controlled over the entire circumference of the flange portion 22, so that the welding quality can be stabilized at a high level.

また、通気部２９は、板状溶着部２４の外周面や板状溶着部２４の内周面を凹ませた形態ではなく、フランジ部２２（板状溶着部２４）を厚さ方向に貫通した形態である。したがって、フランジ部２２に通気部２９を形成しても、フランジ部２２における壁部との溶着面積が減少することはない。これにより、通気部２９を形成することに起因する溶着強度の低下を、回避できる。 Further, the ventilation portion 29 does not have a shape in which the outer peripheral surface of the plate-shaped welded portion 24 and the inner peripheral surface of the plate-shaped welded portion 24 are recessed, but penetrates the flange portion 22 (plate-shaped welded portion 24) in the thickness direction. It is a form. Therefore, even if the ventilation portion 29 is formed on the flange portion 22, the welding area of the flange portion 22 with the wall portion does not decrease. As a result, it is possible to avoid a decrease in welding strength due to the formation of the ventilation portion 29.

＜実施例２＞
次に、本発明を具体化した実施例２を図６を参照して説明する。本実施例２の支柱部材３０は、フランジ部２２（板状溶着部２４）に形成されている通気部３１を上記実施例１とは異なる構成としたものである。その他の構成については上記実施例１と同じであるため、同じ構成については、同一符号を付し、構造、作用及び効果の説明は省略する。 <Example 2>
Next, Example 2 embodying the present invention will be described with reference to FIG. The support column member 30 of the second embodiment has a structure in which the ventilation portion 31 formed in the flange portion 22 (plate-shaped welding portion 24) is different from that of the first embodiment. Since other configurations are the same as those in the first embodiment, the same configurations are designated by the same reference numerals, and the description of the structure, action, and effect will be omitted.

実施例１の通気部２９が、板状溶着部２４を板厚方向（支柱部材２０の軸線方向）に貫通した孔形状であるのに対し、本実施例２の通気部３１は、板状溶着部２４の外周面を凹ませて、溝部２６内を板状溶着部２４の外周面へ開放させた形態である。通気部３１は、板状溶着部２４の上面と下面（外周側溶着面２７）にも開口している。 The ventilation portion 29 of the first embodiment has a hole shape that penetrates the plate-shaped welding portion 24 in the plate thickness direction (the axial direction of the support column member 20), whereas the ventilation portion 31 of the second embodiment has a plate-like welding portion. The outer peripheral surface of the portion 24 is recessed so that the inside of the groove portion 26 is opened to the outer peripheral surface of the plate-shaped welded portion 24. The ventilation portion 31 is also open to the upper surface and the lower surface (outer peripheral side welding surface 27) of the plate-shaped welding portion 24.

＜実施例３＞
次に、本発明を具体化した実施例３を図７を参照して説明する。本実施例３の支柱部材３２は、フランジ部２２（板状溶着部２４）に形成されている通気部３３を上記実施例１とは異なる構成としたものである。その他の構成については上記実施例１と同じであるため、同じ構成については、同一符号を付し、構造、作用及び効果の説明は省略する。 <Example 3>
Next, Example 3 embodying the present invention will be described with reference to FIG. The support column member 32 of the third embodiment has a structure in which the ventilation portion 33 formed in the flange portion 22 (plate-shaped welding portion 24) is different from that of the first embodiment. Since other configurations are the same as those in the first embodiment, the same configurations are designated by the same reference numerals, and the description of the structure, action, and effect will be omitted.

本実施例３の通気部３３は、板状溶着部２４における下壁部１３及び上壁部１４との対向面２５を凹ませた形態である。通気部３３は、対向面２５を構成する外周側溶着面２７と内周側溶着面２８のうち外周側溶着面２７のみに形成されている。通気部３３は、溝部２６内を板状溶着部２４の外周面へ開放させた形態である。 The ventilation portion 33 of the third embodiment has a form in which the facing surface 25 of the plate-shaped welding portion 24 with the lower wall portion 13 and the upper wall portion 14 is recessed. The ventilation portion 33 is formed only on the outer peripheral side welding surface 27 of the outer peripheral side welding surface 27 and the inner peripheral side welding surface 28 forming the facing surface 25. The ventilation portion 33 has a form in which the inside of the groove portion 26 is opened to the outer peripheral surface of the plate-shaped welding portion 24.

＜実施例４＞
次に、本発明を具体化した実施例４を図８を参照して説明する。本実施例４の支柱部材３４は、フランジ部２２（板状溶着部２４）に形成されている溝部３５を上記実施例１とは異なる構成としたものである。その他の構成については上記実施例１と同じであるため、同じ構成については、同一符号を付し、構造、作用及び効果の説明は省略する。 <Example 4>
Next, Example 4 embodying the present invention will be described with reference to FIG. The support column member 34 of the fourth embodiment has a groove portion 35 formed in the flange portion 22 (plate-shaped welded portion 24) having a configuration different from that of the first embodiment. Since other configurations are the same as those in the first embodiment, the same configurations are designated by the same reference numerals, and the description of the structure, action, and effect will be omitted.

上記実施例１のフランジ部２２には、全周にわたって連続した円形をなす１つの溝部２６が形成されていたのに対し、本実施例４のフランジ部２２には、フランジ部２２と同心円の円弧状をなす４つの溝部３５が形成されている。４つの溝部３５は、周方向に間隔を空けて配されている。通気部２９は、各溝部３５に１つずつ形成されている。 The flange portion 22 of the first embodiment is formed with one groove portion 26 having a continuous circular shape over the entire circumference, whereas the flange portion 22 of the fourth embodiment is a circle concentric with the flange portion 22. Four arcuate groove 35s are formed. The four groove portions 35 are arranged at intervals in the circumferential direction. One ventilation portion 29 is formed in each groove portion 35.

＜他の実施例＞
本発明は上記記述及び図面によって説明した実施例に限定されるものではなく、例えば次のような実施例も本発明の技術的範囲に含まれる。
（１）上記実施例１〜４では、４つの通気部を設けたが、通気部の数は３つ以下でもよく、５つ以上でもよい。
（２）上記実施例１〜４では、複数の通気部を周方向に等角度ピッチで配したが、複数の通気部を、周方向において不等角度のピッチで配してもよい。
（３）上記実施例１〜４では、径方向における溝部の幅寸法が、周方向の全長に亘って一定の寸法であるが、径方向における溝部の幅寸法は、周方向において異なっていてもよい。
（４）上記実施例１〜４では、支柱部材がタンク本体の上壁部と下壁部の両方に溶着されるが、支柱部材は、上壁部と下壁部のうちいずれか一方の壁部のみに溶着されるようにしてもよい。
（５）上記実施例１〜４では、溶着が完了した状態で溝部内に空気が残留するようにしたが、溶着が完了した状態で、溝部が溶着時の変形部位で埋められ、溝部内に空気が残留しないようにしてもよい。この場合、フランジ部における上壁部及び下壁部との対向面のうち、少なくとも溝部以外の領域は溶着されるので、必要最少の溶着面積を確保することができる。
（６）上記実施例１〜４では、フランジ部の外周形状が円形又は円弧形であるが、フランジ部の外周形状は楕円形、長円形、多角形等であってもよい。
（７）上記実施例１〜４では、溝部の形状が円形又は円弧形であるが、溝部の形状は楕円形、長円形、多角形等であってもよい。
（８）上記実施例１〜４では、溝部の断面形状が方形であるが、溝部の断面形状は、台形、三角形、半円形等であってもよい。
（９）上記実施例４において、通気部を、実施例２，３のようにフランジ部の外周面に開口する形態としてもよい。 <Other Examples>
The present invention is not limited to the examples described by the above description and drawings, and for example, the following examples are also included in the technical scope of the present invention.
(1) In Examples 1 to 4 above, four ventilation portions are provided, but the number of ventilation portions may be three or less, or five or more.
(2) In Examples 1 to 4 above, a plurality of ventilation portions are arranged at equal angles in the circumferential direction, but a plurality of ventilation portions may be arranged at unequal angles in the circumferential direction.
(3) In Examples 1 to 4 above, the width dimension of the groove portion in the radial direction is a constant dimension over the entire length in the circumferential direction, but the width dimension of the groove portion in the radial direction may be different in the circumferential direction. Good.
(4) In the above-described first to fourth embodiments, the strut member is welded to both the upper wall portion and the lower wall portion of the tank body, but the strut member is a wall of either the upper wall portion or the lower wall portion. It may be welded only to the part.
(5) In Examples 1 to 4 above, air was allowed to remain in the groove in the state where welding was completed, but in the state where welding was completed, the groove was filled with the deformed portion at the time of welding, and the inside of the groove was filled. Air may not remain. In this case, of the surfaces of the flange portion facing the upper wall portion and the lower wall portion, at least a region other than the groove portion is welded, so that the minimum required welding area can be secured.
(6) In Examples 1 to 4, the outer peripheral shape of the flange portion is circular or arcuate, but the outer peripheral shape of the flange portion may be elliptical, oval, polygonal or the like.
(7) In Examples 1 to 4 above, the shape of the groove is circular or arcuate, but the shape of the groove may be elliptical, oval, polygonal or the like.
(8) In Examples 1 to 4 above, the cross-sectional shape of the groove is square, but the cross-sectional shape of the groove may be trapezoidal, triangular, semicircular or the like.
(9) In the fourth embodiment, the ventilation portion may be opened to the outer peripheral surface of the flange portion as in the second and third embodiments.

１０…燃料タンク
１１…タンク本体
１３…下壁部（壁部）
１４…上壁部（壁部）
２０，３０，３２，３４…支柱部材
２２…フランジ部
２５…対向面
２６，３５…溝部
２９，３１，３３…通気部 10 ... Fuel tank 11 ... Tank body 13 ... Lower wall (wall)
14 ... Upper wall (wall)
20, 30, 32, 34 ... Strut member 22 ... Flange part 25 ... Facing surface 26, 35 ... Groove part 29, 31, 33 ... Ventilation part

Claims (4)

合成樹脂製のタンク本体と、
前記タンク本体内に収容された合成樹脂製の支柱部材と、
前記支柱部材に形成され、前記タンク本体の壁部に溶着された環状のフランジ部と、
前記フランジ部における前記壁部との対向面に形成された周方向の溝部と、
前記溝部内と前記支柱部材の外部とを連通させる通気部とを備えていることを特徴とする燃料タンク。 The tank body made of synthetic resin and
A strut member made of synthetic resin housed in the tank body and
An annular flange portion formed on the support column member and welded to the wall portion of the tank body,
A groove portion in the circumferential direction formed on the surface of the flange portion facing the wall portion and
A fuel tank including a ventilation portion that communicates the inside of the groove portion with the outside of the support column member. 前記溝部が、前記フランジ部の全周にわたって連続した形態であることを特徴とする請求項１記載の燃料タンク。 The fuel tank according to claim 1, wherein the groove portion has a continuous shape over the entire circumference of the flange portion. 前記通気部が、前記フランジ部を厚さ方向に貫通した形態であることを特徴とする請求項１又は請求項２記載の燃料タンク。 The fuel tank according to claim 1 or 2, wherein the ventilation portion penetrates the flange portion in the thickness direction. 合成樹脂製のタンク本体内に収容され、燃料タンクを構成する合成樹脂製の支柱部材であって、
前記タンク本体の壁部に溶着される環状のフランジ部と、
前記フランジ部における前記壁部との対向面に形成された周方向の溝部と、
前記溝部内を外部に連通させる通気部とを備えていることを特徴とする支柱部材。 It is a support member made of synthetic resin that is housed in the tank body made of synthetic resin and constitutes a fuel tank.
An annular flange portion welded to the wall portion of the tank body and
A groove portion in the circumferential direction formed on the surface of the flange portion facing the wall portion and
A strut member including a ventilation portion that communicates the inside of the groove portion with the outside.
JP2019119310A 2019-06-27 2019-06-27 Fuel tank and strut members Active JP7349825B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016506331A (en) * 2013-02-27 2016-03-03 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテルハフツング ウント コンパニー コマンディートゲゼルシャフト Fuel tank
JP2017095022A (en) * 2015-11-27 2017-06-01 八千代工業株式会社 Manufacturing method of fuel tank
JPWO2016167018A1 (en) * 2015-04-15 2017-12-14 八千代工業株式会社 Fuel tank
WO2018225413A1 (en) * 2017-06-06 2018-12-13 八千代工業株式会社 Fuel tank manufacturing device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016167018A (en) 2015-03-10 2016-09-15 京セラドキュメントソリューションズ株式会社 Toner for electrostatic latent image development, two-component developer, image forming apparatus, and image forming method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016506331A (en) * 2013-02-27 2016-03-03 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテルハフツング ウント コンパニー コマンディートゲゼルシャフト Fuel tank
JPWO2016167018A1 (en) * 2015-04-15 2017-12-14 八千代工業株式会社 Fuel tank
JP2017095022A (en) * 2015-11-27 2017-06-01 八千代工業株式会社 Manufacturing method of fuel tank
WO2018225413A1 (en) * 2017-06-06 2018-12-13 八千代工業株式会社 Fuel tank manufacturing device

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