JP2009019917A

JP2009019917A - Oil level gauge

Info

Publication number: JP2009019917A
Application number: JP2007181291A
Authority: JP
Inventors: Masami Abe; 正美阿部; Keiichi Itagaki; 敬一板垣; Hideaki Okamoto; 英明岡本
Original assignee: Murata Spring Co Ltd
Current assignee: Murata Spring Co Ltd
Priority date: 2007-07-10
Filing date: 2007-07-10
Publication date: 2009-01-29

Abstract

<P>PROBLEM TO BE SOLVED: To improve insertion properties of an oil level gauge by enhancing flexural rigidity close to the grip section of a gauge section. <P>SOLUTION: The oil level gauge has: a slender, planar gauge section 7 inserted into a guide pipe in an oil tank; and a grip section 9 formed at one end of the gauge section 7. In the oil level gauge, an assist plate 8 shorter than the gauge section 7 is overlapped to the side of the grip section 9 in the gauge section 7, and the tip of the assist plate 8 is stuck to the gauge section 7. Then, the longitudinal length of the assist plate 8 is preferably 30-70% of the length of the gauge section 7. Also, the gauge section 7 and the assist plate 8 may be formed by twisting over the entire length. By overlapping the assist plate 8 to the gauge section 7 for sticking, the flexural rigidity of the gauge section 7 at the side of the grip section 9 increases as compared with the gauge section 7 alone, thus easily inserting into a pipe for inserting the oil level gauge. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、車両用のエンジン等の油タンク内に設置されて、油タンク内のオイル状況を把握するための平板形または捻回形のオイルレベルゲージに関する。 The present invention relates to a flat or twisted oil level gauge that is installed in an oil tank such as an engine for a vehicle and grasps the state of oil in the oil tank.

従来、オイルレベルゲージの一般的な構造として、平板形のオイルレベルゲージがある。平板形のオイルレベルゲージは、図９に示されるように、細長い形状をしたゲージ部１とその左端に形成されたグリップ部２により構成されていた。ゲージ部１の先端が油量確認部３となり、油タンク内の油量を確認するときに目視される。この構造をした平板形オイルレベルゲージは、ゲージ部１の板厚方向の曲げ剛性が板幅方向の曲げ剛性より小さいため、ゲージ部１は板厚方向へ容易に変形できる。また、他の構造のオイルレベルゲージとして、捻回形のオイルレベルゲージがある。捻回形のオイルレベルゲージは、図１０に示されるように、細長い形状の平板を捻回したゲージ部４と、その左端に形成されたグリップ部５により構成されていた。ゲージ部４の先端が油量確認部６となり、油タンク内の油量を確認するときに目視される。この構造をした捻回形のオイルレベルゲージは、いずれの方向へも容易に変形できる。なお、公知のオイルレベルゲージとしては、特許文献１〜３に記載の「オイルレベルゲージ」がある。
特開２００７−１２０４０７号公報特開２００７−７８５８４号公報特開２００７−１０５９２号公報 Conventionally, there is a flat oil level gauge as a general structure of an oil level gauge. As shown in FIG. 9, the flat oil level gauge is composed of a gage portion 1 having an elongated shape and a grip portion 2 formed at the left end thereof. The tip of the gauge unit 1 becomes the oil amount confirmation unit 3, which is visually observed when the amount of oil in the oil tank is confirmed. In the flat oil level gauge having this structure, since the bending rigidity in the thickness direction of the gauge portion 1 is smaller than the bending rigidity in the width direction, the gauge portion 1 can be easily deformed in the thickness direction. As another structure oil level gauge, there is a twisted oil level gauge. As shown in FIG. 10, the twisted oil level gauge is composed of a gauge portion 4 obtained by twisting an elongated flat plate and a grip portion 5 formed at the left end thereof. The tip of the gauge part 4 becomes the oil amount confirmation part 6 and is visually observed when confirming the oil amount in the oil tank. The twisted oil level gauge having this structure can be easily deformed in any direction. Known oil level gauges include “oil level gauges” described in Patent Documents 1 to 3.
JP 2007-120407 A JP 2007-78584 A JP 2007-10492 A

しかしながら、上述した従来の平板形のオイルレベルゲージおよび捻回形のオイルレベルゲージは、ゲージ部が一定板厚の平板または捻回平板一枚のみの構成であるため、長尺になればなるほど自重によるゲージ部のたわみが大きく、即ち曲げ剛性が小さくなり、オイルレベルゲージ挿入用パイプに容易には挿入できないという欠点があった。
そこで、本発明は、平板形および捻回形のオイルレベルゲージのゲージ部の曲げ剛性を増して、オイルレベルゲージ挿入用パイプへの挿入を容易にするオイルレベルゲージを提案することを目的とした。 However, since the conventional flat oil level gauge and the twisted oil level gauge described above have only a single flat plate or a twisted flat plate with a constant gauge thickness, the longer the length, the self-weight The gauge part has a large deflection, that is, the bending rigidity becomes small, and it cannot be easily inserted into the oil level gauge insertion pipe.
Therefore, the present invention has an object of proposing an oil level gauge that increases the bending rigidity of the gauge portion of the flat and twisted oil level gauges and facilitates insertion into the oil level gauge insertion pipe. .

上記課題を解決するために、本発明は、油タンク内のガイドパイプへ挿入される細長い板状のゲージ部と、該ゲージ部の一端に形成されたグリップ部とを有するオイルレベルゲージにおいて、前記ゲージ部のグリップ部側にゲージ部よりも短い補助板を重ね、該補助板の先端を前記ゲージ部に固着したことを特徴とする。ここで、前記補助板の長手方向の長さは、ゲージ部の長さの３０〜７０％であることが好ましい。また、前記ゲージ部および補助板を捻回して成形することも可能である。 In order to solve the above problems, the present invention provides an oil level gauge having an elongated plate-like gauge portion inserted into a guide pipe in an oil tank, and a grip portion formed at one end of the gauge portion. An auxiliary plate shorter than the gauge portion is stacked on the grip portion side of the gauge portion, and the tip of the auxiliary plate is fixed to the gauge portion. Here, the length of the auxiliary plate in the longitudinal direction is preferably 30 to 70% of the length of the gauge portion. Further, the gauge part and the auxiliary plate can be twisted and formed.

さらに、前記補助板の先端部が当接するゲージ部に透孔を穿設しその透孔に補助板先端に形成した舌片を挿入折曲することによりゲージ部と補助板先端を固着することが可能である。同様に、前記補助板の先端部が当接するゲージ部の外側面または補助板の外側面に突起を突設し、前記突起部分のゲージ部と補助板の外周を、中間に嵌合孔を有する抱持金具により抱持しかつ前記突起を前記嵌合孔に嵌合させることによりゲージ部と補助板先端を固着することが可能である。 Further, the gauge portion and the auxiliary plate tip can be fixed by forming a through hole in the gauge portion with which the tip end portion of the auxiliary plate abuts and inserting and bending a tongue piece formed at the tip of the auxiliary plate into the through hole. Is possible. Similarly, a projection is provided on the outer surface of the gauge portion or the outer surface of the auxiliary plate with which the tip of the auxiliary plate abuts, and a fitting hole is provided between the gauge portion of the protruding portion and the outer periphery of the auxiliary plate. It is possible to fix the gauge portion and the auxiliary plate tip by holding the holding bracket and fitting the projection into the fitting hole.

以上述べたように本発明によれば、平板形または平板捻回形のオイルレベルゲージのゲージ部に補助板として、平板または捻回平板を重ねて固着したことにより、従来に比べ曲げ剛性が増大し、オイルレベルゲージ挿入用パイプに容易に挿入することが可能となる。 As described above, according to the present invention, the bending rigidity is increased as compared with the prior art by attaching the flat plate or the twisted flat plate as the auxiliary plate to the gauge portion of the flat plate or flat plate type oil level gauge. In addition, it can be easily inserted into the oil level gauge insertion pipe.

以下、図に基づいて本発明の実施形態を説明する。図１に、本発明に係るオイルレベルゲージの第１の実施形態の外観図を示す。この実施形態は、ゲージ部が平板である場合の実施形態である。図において、オイルレベルゲージは、細長い平板形状をしたバネ材等からなるゲージ部７と、そのゲージ部７の途中までの長さのバネ材等の平板からなる補助板８をゲージ部７に重ねた状態で、それらの左端をグリップ部９に接続して構成され、ゲージ部７の先端を油量確認部１０とする。補助板８の右側先端はゲージ部７に固着されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the external view of 1st Embodiment of the oil level gauge which concerns on this invention is shown. This embodiment is an embodiment in the case where the gauge portion is a flat plate. In the figure, the oil level gauge has a gage portion 7 made of a spring material or the like in the form of an elongated flat plate and an auxiliary plate 8 made of a flat plate of a spring material or the like having a length up to the middle of the gage portion 7. In such a state, the left end thereof is connected to the grip part 9, and the tip of the gauge part 7 is defined as an oil amount confirmation part 10. The right end of the auxiliary plate 8 is fixed to the gauge portion 7.

図２は図１における補助板８の右側先端の固着構造を示す平面図および断面図である。図において、補助板８の右端部が当接されるゲージ部７には、幅方向中央に透孔１１が穿設されている。補助板８の右端は凸形に幅の狭い舌片１２が形成され、その舌片１２が透孔１１に挿入された後、折曲されて透孔１１の縁部１１ａに係止される。これにより、補助板８の先端部はゲージ部７と一体となる。なお、舌片１２と透孔１１の係合については、他の工程として、予め舌片１２を折曲しておいてから、透孔１１に舌片１２の折曲部１２ａを挿入し、補助板８を左方へ移動して、舌片１２の折曲部１２ａに透孔１１の縁部１１ａを圧入させることも可能である。 2A and 2B are a plan view and a cross-sectional view showing the fixing structure of the right end of the auxiliary plate 8 in FIG. In the figure, a through hole 11 is formed at the center in the width direction in the gauge portion 7 with which the right end portion of the auxiliary plate 8 is brought into contact. A tongue 12 having a narrow width is formed at the right end of the auxiliary plate 8, and the tongue 12 is inserted into the through hole 11, and then bent and locked to the edge 11 a of the through hole 11. Thereby, the front-end | tip part of the auxiliary | assistant board 8 becomes integral with the gauge part 7. FIG. As for the engagement between the tongue piece 12 and the through hole 11, as another step, the tongue piece 12 is bent in advance, and then the bent portion 12 a of the tongue piece 12 is inserted into the through hole 11 to assist. It is also possible to press the edge portion 11a of the through hole 11 into the bent portion 12a of the tongue piece 12 by moving the plate 8 to the left.

図３は図１における補助板８の右側先端の固着構造の他の例を示す分解斜視図および断面図である。図において、補助板８の右端の幅方向中央の上面に突起であるところのダボ１３が突設されている。また、図示されるように、断面が口字形でその一辺の中間部が欠落した形状の抱持金具１４を用意する。この抱持金具１４の中間部の長辺中央には、ダボ１３に対応した嵌合孔であるところの透孔１５が穿設されている。この抱持金具１４を、欠落部が下となる向きにしてゲージ部７の先端から挿入し、補助板８の先端を圧入し、抱持金具１４の透孔１５にダボ１３を嵌合させる。透孔１５にダボ１３が嵌合することで、抱持金具１４は補助板８の先端部に保持されて、補助板８がゲージ部７と一体化される。 3 is an exploded perspective view and a sectional view showing another example of the fixing structure of the right end of the auxiliary plate 8 in FIG. In the figure, a dowel 13 that is a protrusion is provided on the upper surface of the right end of the auxiliary plate 8 in the center in the width direction. Moreover, as shown in the drawing, a holding metal fitting 14 having a cross-sectional shape with a middle portion on one side missing is prepared. A through-hole 15 that is a fitting hole corresponding to the dowel 13 is formed in the center of the long side of the intermediate portion of the holding metal fitting 14. The holding metal fitting 14 is inserted from the tip of the gauge portion 7 with the missing portion facing downward, the tip of the auxiliary plate 8 is press-fitted, and the dowel 13 is fitted into the through hole 15 of the holding metal fitting 14. When the dowel 13 is fitted into the through hole 15, the holding metal fitting 14 is held at the tip of the auxiliary plate 8, and the auxiliary plate 8 is integrated with the gauge portion 7.

その結果、補助板８とゲージ部７とが互いに分離された自由状態に比べ、一体化されたことでその厚み方向の断面２次モーメントが増大、すなわち、オイルレベルゲージとしての曲げ剛性が増大することになり、オイルレベルゲージ挿入用パイプへの挿入が容易になる。なお、図３の抱持金具１４は、塑性変形が容易な材質にすれば、最初の形状を、嵌合に対して緩めな寸法にしておき、ゲージ部７の先端から挿入することなく、補助板８の先端位置から嵌め込み、かしめてゲージ部７に固着させることも可能である。また、図３では、補助板８側にダボ１３を突設したが、ゲージ部７側に突設しても同様に抱持金具１４を取り付けることが可能である。さらには、補助板８またはゲージ部７側に透孔を形成し、抱持金具１４側にダボを突設しても同様に、抱持金具１４を固定することが可能である。 As a result, as compared with the free state in which the auxiliary plate 8 and the gauge portion 7 are separated from each other, the cross-sectional secondary moment in the thickness direction is increased due to the integration, that is, the bending rigidity as an oil level gauge is increased. Therefore, the oil level gauge can be easily inserted into the pipe. If the holding metal fitting 14 of FIG. 3 is made of a material that can be easily plastically deformed, the initial shape is set to a size that is loose with respect to the fitting, and the auxiliary metal fitting 14 is not inserted from the tip of the gauge portion 7. It is also possible to fit from the tip position of the plate 8 and fix it to the gauge portion 7 by caulking. In FIG. 3, the dowel 13 protrudes from the auxiliary plate 8 side, but the holding metal fitting 14 can be similarly attached even when protruding from the gauge portion 7 side. Furthermore, even if a through hole is formed on the auxiliary plate 8 or the gauge portion 7 side and a dowel is provided on the holding metal fitting 14 side, the holding metal fitting 14 can be fixed in the same manner.

図４は、図１のオイルレベルゲージにおけるゲージ部の長さに対する補助板の長さの比による自重撓み量を比較したグラフである。図では、グリップ部を把持して水平に保持するとともに、ゲージ部の幅方向を水平にしたときのゲージ部の自重による撓みを示したものである。図中のＬは平板本体の長さ、すなわちゲージ部７の長さであり、Ｓは平板重ね体長さ、すなわち補助板８の長さである。図では、Ｓ／Ｌの値が２０％、５０％、８０％についてと、比較のため従来の補助板のないゲージ部単体の場合の自重による撓み量を表示している。図示されるように、Ｓ／Ｌの値が５０％のとき自重撓み量が最小であり、Ｓ／Ｌの値が０に近い値でも、また１に近い値でも、従来例に比較して効果が小さいことが推定できる。また、図示しない他のＳ／Ｌの値について実験したところ、Ｓ／Ｌの値が３０〜７０％の範囲が、実用的な好ましい範囲であることが判明した。 FIG. 4 is a graph comparing the self-weight deflection amount by the ratio of the length of the auxiliary plate to the length of the gauge portion in the oil level gauge of FIG. In the figure, the grip portion is gripped and held horizontally, and the deflection of the gauge portion due to its own weight when the width direction of the gauge portion is horizontal is shown. In the drawing, L is the length of the flat plate body, that is, the length of the gauge portion 7, and S is the length of the flat plate stack, that is, the length of the auxiliary plate 8. In the figure, the S / L values are 20%, 50%, and 80%, and for comparison, the deflection amount due to its own weight in the case of a single gauge unit without a conventional auxiliary plate is displayed. As shown in the figure, when the S / L value is 50%, the self-weight deflection amount is minimum, and even if the S / L value is close to 0 or close to 1, it is effective compared to the conventional example. Can be estimated to be small. Further, when other S / L values (not shown) were experimented, it was found that the S / L value range of 30 to 70% was a practically preferable range.

図５に、本発明に係るオイルレベルゲージの第２の実施形態の外観図を示す。この実施形態は、平板を一様に捻回してゲージ部を形成した場合の実施形態である。図において、オイルレベルゲージは、細長い形状の平板を一様に捻回したバネ材等からなるゲージ部２７と、そのゲージ部２７の途中までの長さの平板をゲージ部２７と同一方向に同一ピッチで一様に捻回したバネ材等からなる補助板２８をゲージ部２７に重ねた状態で、それらの左端をグリップ部２９に接続して構成され、ゲージ部２７の先端を油量確認部３０とする。補助板２８の右側先端はゲージ部２７に固着されている。 In FIG. 5, the external view of 2nd Embodiment of the oil level gauge which concerns on this invention is shown. This embodiment is an embodiment in the case where a gauge portion is formed by uniformly twisting a flat plate. In the figure, the oil level gauge is the same in the same direction as the gauge portion 27, the gauge portion 27 made of a spring material or the like obtained by uniformly twisting an elongated flat plate and the length of the flat portion of the gauge portion 27. The auxiliary plate 28 made of a spring material or the like twisted uniformly at a pitch is overlapped on the gauge portion 27, and the left end thereof is connected to the grip portion 29, and the tip of the gauge portion 27 is connected to the oil amount confirmation portion. 30. The right end of the auxiliary plate 28 is fixed to the gauge portion 27.

図６は図５における補助板２８の右側先端の固着構造を示す平面図および断面図である。図において、補助板２８の右端部が当接されるゲージ部２７には、幅方向中央に透孔３１が穿設されている。補助板２８の右端は凸形に幅の狭い舌片３２が形成され、その舌片３２が透孔３１に挿入された後、折曲されて透孔３１の縁部３１ａに係止される。これにより、補助板２８の先端部はゲージ部２７と一体となる。なお、舌片３２と透孔３１の係合については、他の工程として、予め舌片３２を折曲しておいてから、透孔３１に舌片３２の折曲部３２ａを挿入し、補助板２８を左方へ移動して、舌片３２の折曲部３２ａに透孔３１の縁部３１ａを圧入させることも可能である。 6A and 6B are a plan view and a cross-sectional view showing a fixing structure at the right end of the auxiliary plate 28 in FIG. In the figure, a through hole 31 is formed in the center in the width direction of the gauge portion 27 with which the right end portion of the auxiliary plate 28 abuts. A tongue piece 32 having a narrow width is formed on the right end of the auxiliary plate 28, and the tongue piece 32 is inserted into the through hole 31 and then bent and locked to the edge portion 31 a of the through hole 31. As a result, the tip of the auxiliary plate 28 is integrated with the gauge portion 27. As for the engagement between the tongue piece 32 and the through hole 31, as another step, the tongue piece 32 is bent in advance, and then the bent portion 32 a of the tongue piece 32 is inserted into the through hole 31 to assist. It is also possible to press the edge 31a of the through hole 31 into the bent portion 32a of the tongue piece 32 by moving the plate 28 to the left.

図７は図５における補助板２８の右側先端の固着構造の他の例を示す分解斜視図および断面図である。図において、補助板２８の右端の幅方向中央の上面に突起であるところのダボ３３が突設されている。また、図示されるように、断面が口字形でその一辺の中間部が欠落した形状の抱持金具３４を用意する。この抱持金具３４の中間部の長辺中央には、ダボ３３に対応した嵌合孔であるところの透孔３５が穿設されている。この抱持金具３４を、欠落部が下となる向きにしてゲージ部２７の先端から挿入し、補助板２８の先端を圧入し、抱持金具３４の透孔３５にダボ３３を嵌合させる。透孔３５にダボ３３が嵌合することで、抱持金具３４は補助板２８の先端部に保持されて、補助板２８がゲージ部２７と一体化される。 FIG. 7 is an exploded perspective view and a sectional view showing another example of the fixing structure of the right end of the auxiliary plate 28 in FIG. In the figure, a dowel 33 as a protrusion is provided on the upper surface of the right end of the auxiliary plate 28 in the center in the width direction. Further, as shown in the drawing, a holding metal fitting 34 having a cross-sectional shape with a middle portion on one side missing is prepared. A through-hole 35 that is a fitting hole corresponding to the dowel 33 is formed in the center of the long side of the intermediate portion of the holding metal fitting 34. The holding metal fitting 34 is inserted from the front end of the gauge portion 27 with the missing portion facing downward, the front end of the auxiliary plate 28 is press-fitted, and the dowel 33 is fitted into the through hole 35 of the holding metal fitting 34. When the dowel 33 is fitted into the through hole 35, the holding metal fitting 34 is held at the tip of the auxiliary plate 28, and the auxiliary plate 28 is integrated with the gauge portion 27.

その結果、補助板２８とゲージ部２７とが互いに分離された自由状態に比べ、一体化されたことでその厚み方向の断面２次モーメントが増大、すなわち、オイルレベルゲージとしての曲げ剛性が増大することになり、オイルレベルゲージ挿入用パイプへの挿入が容易になる。なお、図７の抱持金具３４は、塑性変形が容易な材質にすれば、最初の形状を、嵌合に対して緩めな寸法にしておき、ゲージ部２７の先端から挿入することなく、補助板２８の先端位置から嵌め込み、かしめてゲージ部２７に固着させることも可能である。また、図７では、補助板２８側にダボ３３を突設したが、ゲージ部２７側に突設しても同様に抱持金具３４を取り付けることが可能である。さらには、補助板２８またはゲージ部２７側に透孔を形成し、抱持金具３４側にダボを突設しても同様に、抱持金具３４を固定することが可能である。 As a result, as compared with the free state in which the auxiliary plate 28 and the gauge portion 27 are separated from each other, the cross-sectional secondary moment in the thickness direction is increased due to the integration, that is, the bending rigidity as an oil level gauge is increased. Therefore, the oil level gauge can be easily inserted into the pipe. If the holding metal fitting 34 in FIG. 7 is made of a material that can be easily plastically deformed, the initial shape is made loose with respect to the fitting, and the auxiliary metal fitting 34 is not inserted from the tip of the gauge portion 27. It is also possible to fit from the tip position of the plate 28 and to fix it to the gauge portion 27 by caulking. In FIG. 7, the dowel 33 protrudes from the auxiliary plate 28 side, but the holding metal fitting 34 can be similarly attached even when protruding from the gauge portion 27 side. Furthermore, even if a through hole is formed on the auxiliary plate 28 or the gauge part 27 side and a dowel is provided on the holding metal part 34 side, the holding metal part 34 can be similarly fixed.

図８は、図５のオイルレベルゲージにおけるゲージ部の長さに対する補助板の長さの比による自重撓み量を比較したグラフである。図では、グリップ部を把持して水平に保持したときのゲージ部の自重による撓みを示したものである。図中のＬは捻回平板本体の長さ、すなわちゲージ部２７の長さであり、Ｓは捻回平板重ね体長さ、すなわち補助板２８の長さである。図では、Ｓ／Ｌが２０％、５０％、８０％についてと、比較のため従来の補助板のないゲージ部単体の場合の自重による撓み量を表示している。図示されるように、Ｓ／Ｌの値が５０％のとき自重撓み量が最小であり、Ｓ／Ｌの値が０に近い値でも、また１に近い値でも、従来例に比較して効果が小さいことが推定できる。また、図示しない他のＳ／Ｌの値について実験したところ、Ｓ／Ｌの値が３０〜７０％の範囲が、実用的な好ましい範囲であることが判明した。 FIG. 8 is a graph comparing the self-weight deflection amount by the ratio of the length of the auxiliary plate to the length of the gauge portion in the oil level gauge of FIG. In the figure, the bending due to the weight of the gauge portion when the grip portion is gripped and held horizontally is shown. In the figure, L is the length of the twisted flat plate body, that is, the length of the gauge portion 27, and S is the length of the twisted flat plate stack, that is, the length of the auxiliary plate 28. In the figure, for S / L of 20%, 50%, and 80%, the amount of deflection due to its own weight in the case of a single gauge unit without a conventional auxiliary plate is shown for comparison. As shown in the figure, when the S / L value is 50%, the self-weight deflection amount is minimum, and even if the S / L value is close to 0 or close to 1, it is effective compared to the conventional example. Can be estimated to be small. Further, when other S / L values (not shown) were experimented, it was found that the S / L value range of 30 to 70% was a practically preferable range.

なお、上述した第１および第２の実施形態では、補助板とゲージ部を機械的に固着していたが、他の固着方法として接着、スポット溶接により固着することも可能である。また、上述した第１および第２の実施形態では、長さの異なる補助板とゲージ部の２枚の板材を組み合わせた構造であるが、他の構成として、構成する補助板の枚数を増して２枚、３枚等とし、それらを段階的に異なる長さにしてゲージ部へ積層することで、オイルレベルゲージをグリップ部で把持して水平に保持したとき、ゲージ部および補助板の各部に発生する自重による曲げモーメントの大きさに、その位置における曲げ剛性（断面２次モーメント）の大きさが対応することになり、自重による撓み量を最小にすることが可能となる。 In the first and second embodiments described above, the auxiliary plate and the gauge portion are mechanically fixed. However, as another fixing method, the auxiliary plate and the gauge portion may be fixed by bonding or spot welding. Further, in the first and second embodiments described above, the auxiliary plate having a different length and the two plate members of the gauge portion are combined. However, as another configuration, the number of auxiliary plates to be configured is increased. When the oil level gauge is held horizontally by gripping it with the grip part by stacking it on the gauge part with different lengths in stages, and so on, the gauge part and the auxiliary plate The magnitude of the bending rigidity (second moment of section) at that position corresponds to the magnitude of the bending moment due to the generated weight, and the amount of bending due to the weight can be minimized.

本発明に係るオイルレベルゲージの第１の実施形態の外観図である。It is an external view of 1st Embodiment of the oil level gauge which concerns on this invention. 図１の補助板の右側先端の固着構造を示す平面図および断面図である。It is the top view and sectional drawing which show the adhering structure of the right side front end of the auxiliary | assistant board of FIG. 図１の補助板の右側先端の固着構造の他の例を示す分解斜視図および断面図である。FIG. 7 is an exploded perspective view and a cross-sectional view showing another example of a fixing structure at the right end of the auxiliary plate in FIG. 1. 図１のオイルレベルゲージにおけるゲージ部の長さに対する補助板の長さの比による自重撓み量を比較したグラフである。It is the graph which compared the amount of weight deflection by the ratio of the length of the auxiliary | assistant board with respect to the length of the gauge part in the oil level gauge of FIG. 本発明に係るオイルレベルゲージの第２の実施形態の外観図である。It is an external view of 2nd Embodiment of the oil level gauge which concerns on this invention. 図５の補助板の右側先端の固着構造を示す平面図および断面図である。It is the top view and sectional drawing which show the adhering structure of the right side front end of the auxiliary | assistant board of FIG. 図５の補助板の右側先端の他の例の固着構造を示す分解斜視図および断面図である。FIG. 6 is an exploded perspective view and a cross-sectional view showing another example fixing structure of the right end of the auxiliary plate in FIG. 5. 図５のオイルレベルゲージにおけるゲージ部の長さに対する補助板の長さの比による自重撓み量を比較したグラフである。It is the graph which compared the amount of weight deflection by the ratio of the length of the auxiliary | assistant board with respect to the length of the gauge part in the oil level gauge of FIG. 従来のオイルレベルゲージの外観図である。It is an external view of the conventional oil level gauge. 従来のオイルレベルゲージの外観図である。It is an external view of the conventional oil level gauge.

Explanation of symbols

７ゲージ部
８補助板
９グリップ部
１０油量確認部
１１透孔
１１ａ縁部
１２舌片
１２ａ折曲部
１３ダボ
１４抱持金具
１５透孔
２７ゲージ部
２８補助板
２９グリップ部
３０油量確認部
３１透孔
３１ａ縁部
３２舌片
３２ａ折曲部
３３ダボ
３４抱持金具
３５透孔
7 Gage part 8 Auxiliary plate 9 Grip part 10 Oil amount confirmation part 11 Through hole 11a Edge part 12 Tongue piece 12a Bending part 13 Dowel 14 Holding metal 15 Through hole 27 Gauge part 28 Auxiliary plate 29 Grip part 30 Oil amount confirmation part 31 Through-hole 31a Edge 32 Tongue piece 32a Bending part 33 Dowel 34 Holding metal fitting 35 Through-hole

Claims

In an oil level gauge having an elongated plate-like gauge part inserted into a guide pipe in an oil tank, and a grip part formed at one end of the gauge part,
An oil level gauge, wherein an auxiliary plate shorter than the gauge portion is stacked on the grip portion side of the gauge portion, and the tip of the auxiliary plate is fixed to the gauge portion.

The oil level gauge according to claim 1,
The length of the auxiliary plate in the longitudinal direction is 30 to 70% of the length of the gauge part.

The oil level gauge according to claim 1 or 2,
An oil level gauge formed by twisting the gauge part and the auxiliary plate.

The oil level gauge according to any one of claims 1 to 3,
The gauge portion and the auxiliary plate tip are fixed by forming a through hole in the gauge portion with which the tip portion of the auxiliary plate abuts and inserting and bending a tongue piece formed at the tip of the auxiliary plate into the through hole. Oil level gauge to be used.

The oil level gauge according to any one of claims 1 to 3,
A holding metal fitting having a protrusion projecting on the outer surface of the gauge portion or the outer surface of the auxiliary plate with which the tip of the auxiliary plate abuts, and having a fitting hole in the middle between the gauge portion of the protruding portion and the outer periphery of the auxiliary plate The oil level gauge is characterized in that the gauge portion and the auxiliary plate tip are fixed by holding the protrusion and fitting the protrusion into the fitting hole.