JP2019117877A - Seal structure and seal member - Google Patents

Seal structure and seal member Download PDF

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JP2019117877A
JP2019117877A JP2017251573A JP2017251573A JP2019117877A JP 2019117877 A JP2019117877 A JP 2019117877A JP 2017251573 A JP2017251573 A JP 2017251573A JP 2017251573 A JP2017251573 A JP 2017251573A JP 2019117877 A JP2019117877 A JP 2019117877A
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seal
groove
seal member
overlapping
overlapping portion
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JP7063612B2 (en
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長谷川　浩一
Koichi Hasegawa
浩一 長谷川
軼之 蓋
Yizhi Gai
軼之 蓋
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Sumitomo Riko Co Ltd
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Sumitomo Riko Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

To provide a seal structure that has high sealability and can be applied to a large case by using an elastomeric seal member.SOLUTION: A sealing structure includes a first member 2, a second member 3, and an elastomeric sealing member 4 compressed between the first member 2 and the second member 3. A groove 22 for accommodating the seal member 4 is formed at the seal interface of at least one of the first member 2 and the second member 3. The seal member 4 includes an overlapping portion 40 in which a plurality of end portions 41 and 42 overlap in the width direction of the groove 22. In the pre-compression state before the seal member 4 is disposed in the groove 22 and compressed, the cross-sectional area of the overlapping portion 40 is larger than the cross-sectional area of the groove 22 in which the overlapping portion 40 is disposed.SELECTED DRAWING: Figure 1

Description

本発明は、二つの部材間をシールするシール構造およびシール部材に関する。   The present invention relates to a seal structure and a seal member that seal between two members.

電気自動車には、走行用のバッテリーとして、多数のセル電池がバッテリーケースに収容されて搭載される。バッテリーには、航続距離を長くするなどのため、電池容量の増加や高出力化が要求される。電池容量を増加するには、セル電池の搭載数を増加する必要があることから、バッテリーケースが大型化する。また、高出力化により、モーター駆動電圧が高くなるため、電源系ユニットも大型化する傾向にある。   In an electric vehicle, a large number of cell batteries are housed and mounted in a battery case as a battery for traveling. The battery is required to have an increase in battery capacity and high output in order to increase the cruising distance and the like. In order to increase the battery capacity, it is necessary to increase the number of mounted cell batteries, so the battery case becomes larger. In addition, since the motor drive voltage is increased by increasing the output power, the power supply system unit also tends to be enlarged.

バッテリーケースの配置場所は、大型化や車両運動性能を考慮して、車両の床下、あるいは従来のエンジンまたは燃料タンクが配置されていたスペースになることが多い。これらのスペースは、車室外になるため、路面などから跳ね上がる水、粉じんなどからバッテリーを保護する必要がある。通常、バッテリーケースは、セル電池を収容するケース本体と、ケース本体の開口部を塞ぐ蓋体と、から構成される。この場合、ケース本体と蓋体とのシール性が重要になる。   The location of the battery case is often the space under the floor of the vehicle or the space where the conventional engine or fuel tank is disposed, in consideration of the size increase and the vehicle motion performance. Since these spaces are outside the vehicle, it is necessary to protect the battery from water, dust and the like that splash from the road surface. Usually, the battery case is composed of a case body for accommodating the cell battery and a lid for closing the opening of the case body. In this case, the sealability between the case body and the lid becomes important.

シール性の向上を図ったバッテリーケースとして、例えば特許文献１には、シール部材が収容される溝部の外周側に壁部を設けて、防水性を高めた車両用バッテリーケースが記載されている。特許文献２には、ケース本体と蓋体との間に挟持され、ケース本体の開口部を囲むように屈曲されて配置され、内側重なり部と、外側重なり部と、内側屈曲部と、を有するシール部材を備えたバッテリーケースが記載されている。   For example, Patent Document 1 discloses a vehicle battery case in which a wall portion is provided on the outer peripheral side of a groove portion in which a seal member is accommodated, as a battery case in which sealing performance is improved, thereby enhancing waterproofness. In Patent Document 2, it is sandwiched between a case body and a lid, and is bent and disposed so as to surround an opening of the case body, and has an inner overlapping portion, an outer overlapping portion, and an inner bending portion. A battery case with a sealing member is described.

特開２０１１−１９４９８２号公報JP, 2011-194982, A 特開２０１５−２０７４２７号公報JP, 2015-207427, A

上述したように、バッテリーケースは大型化しているため、その開口部全周をゴム製のシール部材でシールしようとすると、シール部材を大きな環状に成形する必要があり、それを製造する成形型などが大型化してしまう。大型の設備を使用すると、設置スペースの問題がある他、加工費用の上昇からシール部材が高額になってしまう。   As described above, since the battery case is large in size, when sealing the entire circumference of the opening with a rubber seal member, it is necessary to form the seal member in a large annular shape, and a mold for manufacturing it Will become larger. The use of a large-sized facility has problems of installation space and increases the processing cost, resulting in an expensive seal member.

一方、ゴム製のシール部材ではなく、接着剤を用いて、ディスペンサー加工する方法が考えられる。しかし、バッテリー交換の際にはバッテリーケースを開封する必要がある。接着剤を使用すると、開封時に接着剤を剥がさなければならず、さらに一度開封するとシール性を再現できないため、再度の加工が必要になるなど手間がかかる。   On the other hand, a method of processing by dispenser using an adhesive instead of a rubber seal member may be considered. However, when replacing the battery, it is necessary to open the battery case. If an adhesive is used, the adhesive must be peeled off at the time of opening, and if it is further opened once, the sealability can not be reproduced, so that it takes time and effort to process it again.

また、バッテリーケースの開口部ではなく、複数のセル電池をユニット化して、当該ユニットごとにシールする方法が考えられる。しかし、この場合は、ユニットごとにシール構造が必要になるため、バッテリーがさらに大型化してしまうし、ユニット間の接続に防水コネクタが必要になるなどして、バッテリーケース、ひいては車両が高額になってしまう。   In addition, it is conceivable to unitize a plurality of cell batteries instead of the opening of the battery case and seal each unit. However, in this case, since a seal structure is required for each unit, the battery is further enlarged, and a waterproof connector is required for connection between units, and the battery case and hence the vehicle become expensive. It will

上述した特許文献１に記載されているシール部材は、発泡ゴム製であり、バッテリーケースの開口部の全周に亘って連続して配置されている。しかし、当該シール部材は、環状に成形されているのではなく、複数のシール部材を接合して環状に成形されているに過ぎない。このため、接合部においてシール性が低下するおそれがある。また、特許文献２に記載されているシール部材は、一本の棒状のゴム材であって、ケース本体の一つの角部（Ｃ６）で端部同士を重ねることにより、開口部の周縁部に枠状に配置されている（特許文献２の図２参照）。特許文献２に記載されているシール部材においては、内側重なり部から外側重なり部に向かう復元力により、端部同士の重複部を密着させている。しかし、当該シール部材は、開口部を囲む端面（２３ａ〜２８ａ）上に貼り付けられている。換言すると、シール部材は、溝部に収容されているのではない。このため、シール部材がずれるおそれがあり、端部同士の重複部に隙間が生じるおそれがある。こうなると、シール性を確保することができない。また、端部同士の重複部が、ケース本体の角部に配置されているため、振動などにより重複部に応力が生じやすく、耐久性が低下するおそれがある。   The seal member described in Patent Document 1 described above is made of foam rubber, and is continuously disposed all around the opening of the battery case. However, the seal member is not formed in an annular shape, but is merely formed in an annular shape by joining a plurality of seal members. For this reason, there is a possibility that the sealability may be reduced at the joint portion. Further, the seal member described in Patent Document 2 is a single rod-like rubber material, and by overlapping end portions at one corner portion (C6) of the case main body, the peripheral portion of the opening portion is formed. It arrange | positions in frame shape (refer FIG. 2 of patent document 2). In the seal member described in Patent Document 2, the overlapping portions of the end portions are in close contact with each other by the restoring force from the inner overlapping portion toward the outer overlapping portion. However, the sealing member is attached to the end face (23a to 28a) surrounding the opening. In other words, the seal member is not accommodated in the groove. For this reason, there is a possibility that the seal member may be displaced, and a gap may be generated in the overlapping portion of the end portions. If this happens, sealing performance can not be ensured. In addition, since the overlapping portion between the end portions is disposed at the corner portion of the case main body, stress is easily generated in the overlapping portion due to vibration or the like, and the durability may be reduced.

本発明は、このような実情に鑑みてなされたものであり、エラストマー製のシール部材を用いて、シール性が高く、大型のケースにも適用することができるシール構造を提供することを課題とする。   The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a seal structure which has high sealability and can be applied to a large case using an elastomer seal member. Do.

（１）上記課題を解決するため、本発明のシール構造は、第一部材と、第二部材と、該第一部材と該第二部材との間で圧縮されるエラストマー製のシール部材と、を備え、該第一部材および該第二部材の少なくとも一方のシール界面には、該シール部材を収容する溝部が形成されており、該シール部材は、該溝部の幅方向に複数の端部が重なる重複部を有し、該シール部材が該溝部に配置され圧縮される前の圧縮前状態において、該重複部の横断面積は、該重複部が配置される該溝部の横断面積よりも大きいことを特徴とする。   (1) In order to solve the above problems, the sealing structure of the present invention comprises a first member, a second member, and an elastomeric sealing member compressed between the first member and the second member; A groove portion for receiving the seal member is formed at a seal interface of at least one of the first member and the second member, and the seal member has a plurality of ends in the width direction of the groove portion. In a pre-compression state before the seal member is disposed in the groove and compressed, the cross-sectional area of the overlap is larger than the cross-sectional area of the groove in which the overlap is disposed. It is characterized by

（２）本発明のシール部材は、上記本発明のシール構造に用いられることを特徴とする。   (2) The seal member of the present invention is characterized in that it is used in the seal structure of the present invention.

（１）通常、エラストマー製のシール部材を溝部に配置して、シール部材の厚さ方向に圧縮して二つの部材間をシールする場合、溝部の横断面積（延在方向に垂直な断面積）は、圧縮される前のシール部材の横断面積よりも大きく設計されている。こうすることにより、シール部材を圧縮した後、シール部材の全部を溝部に収容できるようにしている。この場合、溝部におけるシール部材の充填率は、１００％未満である。例えば、二つの部材間に一本の棒状のシール部材を環状に配置して当該部材間をシールする場合、シール部材を溝部に沿って配置すると共に、一端部と他端部との接合部分については、端部同士を溝部の幅方向に重ねて配置する。この場合、端部同士を重ねて配置する溝部の幅については、二本のシール部材が幅方向に並置できるよう、それ以外の溝部（一本のシール部材が配置される溝部）の幅の二倍程度になるように設計する。図１１に、従来の考え方に基づいたシール構造における圧縮前状態の一部上面図を示す。図１２に、図１１のＸＩＩ−ＸＩＩ断面図を示す。   (1) Usually, when a sealing member made of elastomer is disposed in a groove and compressed in the thickness direction of the sealing member to seal between two members, the cross sectional area of the groove (cross sectional area perpendicular to the extending direction) Is designed to be larger than the cross-sectional area of the seal member before being compressed. By this, after the seal member is compressed, the entire seal member can be accommodated in the groove. In this case, the filling rate of the seal member in the groove portion is less than 100%. For example, when one rod-like seal member is annularly disposed between two members and the members are sealed, the seal member is disposed along the groove and the joint portion between one end and the other end The end portions are arranged overlapping in the width direction of the groove. In this case, with regard to the width of the groove portion in which the end portions are overlapped, the width of the other groove portion (the groove portion in which one seal member is disposed) is set so that the two seal members can be juxtaposed in the width direction. Design to be about double. FIG. 11 shows a partial top view of the state before compression in the seal structure based on the conventional concept. FIG. 12 shows a cross-sectional view taken along line XII-XII of FIG.

図１１に示すように、圧縮前状態において、第一部材８０の溝部９５に配置されたシール部材９０は、第一端部９１および第二端部９２が幅方向に重なる重複部９３と、それ以外の単体部９４と、を有している。溝部９５は、重複部９３が収容される重複部収容部９６と、単体部９４が収容される単体部収容部９７と、を有している。重複部収容部９６には、第一端部９１と第二端部９２とが幅方向に並置されている。単体部収容部９７の幅をａとし、重複部収容部９６の幅をｂとすると、重複部収容部９６の幅ｂは単体部収容部９７の幅ａの二倍である（ｂ＝２ａ）。また、図１２に示すように、溝部９５の重複部収容部９６の横断面（幅方向の断面、図１１のＸＩＩ−ＸＩＩ断面）を見た場合、シール部材９０の重複部９３の横断面積（第一端部９１および第二端部９２の横断面積の合計であり、図１２中、実線ハッチングで示す）は、重複部収容部９６の横断面積（図１２中、点線ハッチングで示す）よりも小さい。   As shown in FIG. 11, in the pre-compression state, the seal member 90 disposed in the groove 95 of the first member 80 has an overlapping portion 93 where the first end 91 and the second end 92 overlap in the width direction, And a single unit 94. The groove portion 95 has an overlapping portion accommodating portion 96 in which the overlapping portion 93 is accommodated, and a single unit accommodating portion 97 in which the single unit 94 is accommodated. In the overlapping portion accommodating portion 96, a first end portion 91 and a second end portion 92 are juxtaposed in the width direction. Assuming that the width of the single-portion housing portion 97 is a and the width of the overlapping-portion housing portion 96 is b, the width b of the overlapping-portion housing portion 96 is twice the width a of the single-portion housing portion 97 (b = 2a) . In addition, as shown in FIG. 12, when the cross section (cross section in the width direction, the XII-XII cross section of FIG. 11) of the overlapping portion accommodating portion 96 of the groove 95 is seen, the cross sectional area (overlapping portion 93 of the sealing member 90) The total cross-sectional area of the first end 91 and the second end 92, which is indicated by solid hatching in FIG. 12, is greater than the cross-sectional area of the overlapping portion accommodating portion 96 (indicated by dotted hatching in FIG. 12). small.

図１２中、白抜き矢印で示すように、第一部材８０の上面に第二部材８１を重ね合わせると、シール部材９０は圧縮されて、溝部９５の重複部収容部９６に収容される。図１３に、従来のシール構造における圧縮後状態の断面図を示す。図１３は、図１１中のＸＩＩ−ＸＩＩ断面図に対応する。図１３に示すように、第一部材８０と第二部材８１とにより厚さ方向に圧縮されると、シール部材９０の第一端部９１および第二端部９２は、幅方向に当接して重複部収容部９６に充填される。ここで、第一端部９１および第二端部９２の横断面積は、それが収容される溝部（重複部収容部９６）の横断面積よりも小さいため、重複部収容部９６において、シール部材９０が充填されていない隙間８２が生じる。隙間８２がシール部材９０の延在方向に連続すると、隙間８２を通って、外部の水分などが入りこむおそれがある。したがって、従来の方法では、シール性を充分に確保することができない。   When the second member 81 is superimposed on the upper surface of the first member 80 as shown by the white arrow in FIG. 12, the seal member 90 is compressed and accommodated in the overlapping portion accommodating portion 96 of the groove portion 95. FIG. 13 shows a cross-sectional view of the conventional seal structure after compression. FIG. 13 corresponds to the XII-XII cross-sectional view in FIG. As shown in FIG. 13, when compressed in the thickness direction by the first member 80 and the second member 81, the first end 91 and the second end 92 of the seal member 90 abut in the width direction. The overlapping portion accommodating portion 96 is filled. Here, the cross-sectional area of the first end portion 91 and the second end portion 92 is smaller than the cross-sectional area of the groove (overlapping portion accommodating portion 96) in which the first end portion 91 and the second end portion 92 are accommodated. The gap 82 is not filled. When the gap 82 continues in the extending direction of the seal member 90, there is a possibility that external moisture or the like may enter through the gap 82. Therefore, in the conventional method, the sealability can not be sufficiently secured.

これに対して、本発明のシール構造によると、圧縮前状態において、溝部の横断面を見た場合に、重複部の横断面積は、重複部が配置される溝部の横断面積よりも大きい。図１に、本発明のシール構造の一部における圧縮前状態の断面図を示す。図２に、同シール構造における圧縮後状態の断面図を示す。図１は前出図１２に対応し、図２は前出図１３に対応している。なお、図１および図２は、本発明のシール構造の一例を模式的に示しているに過ぎず、本発明のシール構造は、図１および図２に示す形態に限定されるものではない。   On the other hand, according to the seal structure of the present invention, in the pre-compression state, the cross-sectional area of the overlapping portion is larger than the cross-sectional area of the groove in which the overlapping portion is disposed. FIG. 1 shows a cross-sectional view of a part of the seal structure of the present invention before compression. FIG. 2 shows a cross-sectional view of the same seal structure after compression. 1 corresponds to FIG. 12, and FIG. 2 corresponds to FIG. 1 and 2 only schematically show an example of the seal structure of the present invention, and the seal structure of the present invention is not limited to the form shown in FIG. 1 and FIG.

図１に示すように、本発明のシール構造においても、圧縮前状態には、シール部材４の端部同士、すなわち第一端部４１と第二端部４２とが溝部２２の幅方向に二つ並置されている。溝部２２のうち、シール部材４の重複部４０が収容される部分（重複部収容部２４）の横断面を見た場合、重複部４０の横断面積（図１中、実線ハッチングで示す）は、重複部収容部２４の横断面積（図１中、点線ハッチングで示す）よりも大きい。   As shown in FIG. 1, also in the seal structure of the present invention, in the pre-compression state, the end portions of the seal member 4, that is, the first end 41 and the second end 42 are two in the width direction of the groove 22. It is juxtaposed. When the cross section of the part (overlapping part accommodation part 24) in which the overlapping part 40 of the sealing member 4 is accommodated among the groove parts 22 is seen, the cross-sectional area (shown by solid hatching in FIG. 1) of the overlapping part 40 is It is larger than the cross-sectional area (shown by dotted hatching in FIG. 1) of the overlapping portion accommodating portion 24.

図１中、白抜き矢印で示すように、第一部材２の上面に第二部材３を重ね合わせると、シール部材４は圧縮されて、第一端部４１および第二端部４２は幅方向に当接して重複部収容部２４に充填される。ここで、第一端部４１および第二端部４２の横断面積は、それが収容される溝部２２（重複部収容部２４）の横断面積よりも大きい。また、シール部材４はエラストマーからなるため、シール部材４のポアソン比は０．５に近い。すなわち、シール部材４は、圧縮された時に体積変化をほとんど生じない。このため、図２に示すように、重複部収容部２４の横断面を見ると、重複部収容部２４の全体にシール部材４（第一端部４１および第二端部４２）が充填される。（余剰のシール部材は他の部分に流入するが、これについては後の実施形態において説明する。）よって、重複部収容部２４の幅方向において、隙間が生じにくい。したがって、本発明のシール構造によると、高いシール性を確保することができる。   When the second member 3 is superimposed on the upper surface of the first member 2 as shown by the white arrow in FIG. 1, the seal member 4 is compressed and the first end 41 and the second end 42 are in the width direction. And the overlapping portion accommodating portion 24 is filled. Here, the cross-sectional area of the first end 41 and the second end 42 is larger than the cross-sectional area of the groove 22 (overlapping portion accommodating portion 24) in which it is accommodated. Further, since the seal member 4 is made of an elastomer, the Poisson's ratio of the seal member 4 is close to 0.5. That is, the sealing member 4 hardly causes a volume change when compressed. For this reason, as shown in FIG. 2, when the cross section of the overlapping portion accommodating portion 24 is viewed, the entire overlapping portion accommodating portion 24 is filled with the seal member 4 (the first end portion 41 and the second end portion 42). . (The excess seal member flows into the other part, which will be described in a later embodiment.) Therefore, a gap does not easily occur in the width direction of the overlapping portion accommodating portion 24. Therefore, according to the seal structure of the present invention, high sealability can be secured.

本発明のシール構造によると、例えばシール部材が紐状、棒状などの有端物であり、当該シール部材を曲げて端部同士が重なるように配置しても、端部同士の重なり部分（重複部）におけるシール性の低下が抑制される。したがって、大型化するバッテリーケースをシールする場合であっても、エラストマー製のシール部材を環状に成形する必要はなく、有端状に成形した一本、あるいは複数本のシール部材の端部同士を重ねることにより、開口部の全周をシールすることができる。この場合、シール部材を押出成形法などにより容易に製造することができるため、製造コストを抑制することができる。   According to the seal structure of the present invention, for example, even if the seal member is an end product such as a string or a rod, the seal member is bent and arranged so that the end portions overlap with each other. The reduction in sealability in Therefore, even in the case of sealing a battery case that is increasing in size, it is not necessary to form the sealing member made of an elastomer in an annular shape, and the end portions of one or a plurality of sealing members formed in an end shape By overlapping, the entire circumference of the opening can be sealed. In this case, since the seal member can be easily manufactured by an extrusion molding method or the like, the manufacturing cost can be suppressed.

（２）本発明のシール部材は、上記本発明のシール構造に用いられるため、形状の制約が少なく、比較的安価にかつ容易に製造することができる。このため、本発明のシール部材は、量産化しやすく、電気自動車のバッテリーケース、インバーターケース、ジャンクションボックスケース、充電器ケースなどのシール部材として好適である。   (2) Since the seal member of the present invention is used for the seal structure of the present invention, it has few restrictions on its shape, and can be manufactured relatively inexpensively and easily. For this reason, the seal member of the present invention is easily mass-produced, and is suitable as a seal member for a battery case, an inverter case, a junction box case, a charger case, etc. of an electric vehicle.

本発明のシール構造の一部における圧縮前状態の断面図である。It is sectional drawing of the state before compression in a part of seal structure of this invention. 同シール構造における圧縮後状態の断面図である。It is sectional drawing of the state after compression in the same seal structure. 第一実施形態のシール構造を有するバッテリーケースの斜視図である。It is a perspective view of a battery case which has a seal structure of a first embodiment. 同バッテリーケースのケース本体の上面図である。It is a top view of the case main body of the battery case. 図４における円Ｖ内の拡大図である。It is an enlarged view in the circle V in FIG. 第一実施形態におけるシール部材の重複部が配置される溝部の圧縮前状態の上面図である。It is a top view of the pre-compression state of the groove part in which the overlapping part of the sealing member in 1st embodiment is arrange | positioned. 第二実施形態におけるシール部材の重複部が配置される溝部の圧縮前状態の上面図である。It is a top view of the pre-compression state of the groove part in which the overlapping part of the sealing member in 2nd embodiment is arrange | positioned. 第三実施形態におけるシール部材の重複部が配置される溝部の圧縮前状態の上面図である。It is a top view of the pre-compression state of the groove part in which the overlapping part of the sealing member in 3rd embodiment is arrange | positioned. 第四実施形態におけるシール部材の重複部が配置される溝部の圧縮後状態の上面図である。It is a top view of the state after compression of the slot where the overlapping part of the seal member in a 4th embodiment is arranged. 同溝部の圧縮前状態の上面図である。It is a top view of the pre-compression state of the groove part. 従来のシール構造における圧縮前状態の一部上面図である。It is a partial top view in the state before compression in the conventional seal structure. 図１１のＸＩＩ−ＸＩＩ断面図である。It is XII-XII sectional drawing of FIG. 従来のシール構造における圧縮後状態の断面図である。It is sectional drawing of the state after compression in the conventional seal structure.

以下に、本発明のシール構造およびシール部材の実施の形態を示す。   Hereinafter, embodiments of the seal structure and the seal member of the present invention will be described.

＜第一実施形態＞
まず、第一実施形態のシール構造およびシール部材の構成について説明する。図３に、第一実施形態のシール構造を有するバッテリーケースの斜視図を示す。図４に、同バッテリーケースのケース本体の上面図を示す。図５に、図４における円Ｖ内の拡大図を示す。説明の便宜上、図３においては、蓋体を透過して示す。図４においては、シール部材にハッチングを施して示す。 First Embodiment
First, the seal structure and the configuration of the seal member of the first embodiment will be described. FIG. 3 shows a perspective view of the battery case having the seal structure of the first embodiment. The top view of the case main body of the same battery case is shown in FIG. FIG. 5 shows an enlarged view within the circle V in FIG. For convenience of explanation, FIG. 3 shows the lid transparently. In FIG. 4, the seal member is hatched.

図３に示すように、バッテリーケース１は、ケース本体２と蓋体３とシール部材４とを備えている。ケース本体２は、金属製であり、上面が開口する箱状を呈している。ケース本体２は、底板２０と、底板２０の周縁に立設された四つの側壁２１とを有している。底板２０と四つの側壁２１とに囲まれた空間には、セル電池など（図略）が格納されている。蓋体３は、金属製であり、平板状を呈している。ケース本体２は、本発明における第一部材の概念に含まれる。蓋体３は、本発明における第二部材の概念に含まれる。   As shown in FIG. 3, the battery case 1 includes a case body 2, a lid 3 and a seal member 4. The case main body 2 is made of metal and has a box shape whose upper surface is open. The case body 2 has a bottom plate 20 and four side walls 21 erected on the periphery of the bottom plate 20. A cell battery or the like (not shown) is stored in a space surrounded by the bottom plate 20 and the four side walls 21. The lid 3 is made of metal and has a flat plate shape. The case body 2 is included in the concept of the first member in the present invention. The lid 3 is included in the concept of the second member in the present invention.

図４に示すように、４つの側壁２１の上端面２１０には、溝部２２が形成されている。溝部２２は、ケース本体２の開口部２３を囲むように、開口部２３の周縁部に全周的に形成されている。溝部２２は、周縁部の四つの角部に配置される四つの湾曲部２２０と、湾曲部２２０同士を繋ぐ直線部２２１と、を有している。溝部２２には、シール部材４が充填されている。   As shown in FIG. 4, grooves 22 are formed on the upper end surfaces 210 of the four side walls 21. The groove 22 is formed on the entire periphery of the opening 23 so as to surround the opening 23 of the case body 2. The groove portion 22 has four curved portions 220 disposed at four corners of the peripheral portion, and a straight portion 221 connecting the curved portions 220 with each other. The groove 22 is filled with the sealing member 4.

シール部材４は、エラストマー製であり、開口部２３の周縁部の全周に亘って配置されている。シール部材４は、棒状の一本の有端物からなり、一方の端部である第一端部４１と、他方の端部である第二端部４２と、を有している。第一端部４１と第二端部４２とが幅方向（前後方向）に当接していることにより、シール部材４は全体として環状を呈している。シール部材４は、ケース本体２と蓋体３との間で圧縮されている。すなわち、ケース本体２の上端面２１０と、蓋体３の下面と、がシール部材４を挟んで当接することにより、ケース本体２の内部空間が密閉されている。ケース本体２の上端面２１０と、蓋体３の下面と、によりシール界面が形成されている。   The seal member 4 is made of an elastomer, and is disposed over the entire circumference of the peripheral portion of the opening 23. The seal member 4 is formed of a rod-like single-ended object, and has a first end 41 which is one end and a second end 42 which is the other end. Since the first end 41 and the second end 42 are in contact in the width direction (front-rear direction), the seal member 4 has an annular shape as a whole. The seal member 4 is compressed between the case body 2 and the lid 3. That is, when the upper end surface 210 of the case main body 2 and the lower surface of the lid 3 abut on both sides of the seal member 4, the internal space of the case main body 2 is sealed. A seal interface is formed by the upper end surface 210 of the case body 2 and the lower surface of the lid 3.

図５に拡大して示すように、シール部材４は、溝部２２の幅方向に第一端部４１と第二端部４２とが重なる重複部４０を有している。圧縮後状態において、シール部材４は、溝部２２のほぼ全体に充填されている。溝部２２には、後述する流入部２４１、２４２の一部が、シール部材４が充填されない状態で残存しているため、溝部２２全体におけるシール部材４の充填率は、１００％以下である。図４に戻って、シール部材４の重複部４０は、バッテリーケース１の後側の上端面２１０に左右方向に延在している溝部２２の直線部２２１に配置されている。   As shown in an enlarged manner in FIG. 5, the seal member 4 has an overlapping portion 40 in which the first end portion 41 and the second end portion 42 overlap in the width direction of the groove portion 22. In the compressed state, the seal member 4 is filled in substantially the entire groove 22. Since a part of inflow parts 241 and 242 mentioned below remains in a state where seal member 4 is not filled up to slot 22, the filling rate of seal member 4 in the whole slot 22 is 100% or less. Returning to FIG. 4, the overlapping portion 40 of the seal member 4 is disposed in the straight end portion 221 of the groove portion 22 extending in the left-right direction on the rear end upper surface 210 of the battery case 1.

次に、シール部材４によるシール方法を説明する。図６に、シール部材の重複部が配置される溝部の圧縮前状態の上面図を示す。図６は、前出図５（前出図４における円Ｖ内の拡大図）に対応している。図６に示すように、シール部材４が溝部２２に配置され、圧縮される前の圧縮前状態において、シール部材４の第一端部４１と第二端部４２とは、溝部２２の幅方向（前後方向）に並置されている。シール部材４は、第一端部４１と第二端部４２とが溝部２２の幅方向に重なる重複部４０と、それ以外の単体部４３と、を有している。溝部２２は、重複部４０が収容される重複部収容部２４と、単体部４３が収容される単体部収容部２５と、を有している。重複部収容部２４の幅ｂは、重複部収容部２４に連続する単体部収容部２５の幅ａの合計（ａ＋ａ＝２ａ）よりも小さい（ｂ＜２ａ）。これにより、前出図１に示したように、重複部収容部２４の横断面（幅方向の断面）を見た場合、重複部４０の横断面積は、重複部収容部２４の横断面積よりも大きくなっている。よって、このままシール部材４が圧縮されると、重複部収容部２４に充填しきれないシール部材４が生じることになる。ここで、重複部収容部２４は、重複部４０が配置される配置部２４０と、圧縮されたシール部材４が流入する流入部２４１、２４２と、を有している。流入部２４１は、第一端部４１が配置されている配置部２４０の右方に隣接して配置されている。換言すると、流入部２４１は、シール部材４の延在方向（左右方向）において第一端部４１に隣接して配置されている。流入部２４２は、第二端部４２が配置されている配置部２４０の左方に隣接して配置されている。換言すると、流入部２４２は、シール部材４の延在方向において第二端部４２に隣接して配置されている。したがって、シール部材４が圧縮されると、第一端部４１および第二端部４２は幅方向に当接し、幅方向に充填しきれない余剰部分は、流入部２４１、２４２に流入する。このようにして、前出図５に示すように、重複部４０の全体が重複部収容部２４に充填される。流入部２４１、２４２の一部は、シール部材４が充填されないまま残存する。これにより、シール部材４によるシール構造が完成する。   Next, a sealing method by the sealing member 4 will be described. FIG. 6 shows a top view of the groove portion in which the overlapping portion of the seal member is disposed before compression. FIG. 6 corresponds to the above-mentioned FIG. 5 (enlarged view within the circle V in the above-mentioned FIG. 4). As shown in FIG. 6, in the pre-compression state before the seal member 4 is disposed in the groove 22 and compressed, the first end 41 and the second end 42 of the seal 4 are in the width direction of the groove 22. They are juxtaposed (in the front and back direction). The seal member 4 has an overlapping portion 40 in which the first end portion 41 and the second end portion 42 overlap in the width direction of the groove portion 22, and a single body portion 43 other than the overlapping portion 40. The groove portion 22 has an overlapping portion accommodating portion 24 in which the overlapping portion 40 is accommodated, and a single unit accommodating portion 25 in which the single unit 43 is accommodated. The width b of the overlapping portion accommodating portion 24 is smaller than the sum (a + a = 2a) of the widths a of the single portion accommodating portions 25 continuous to the overlapping portion accommodating portion 24 (b <2a). Thus, as shown in FIG. 1 described above, when the cross section (cross section in the width direction) of the overlapping portion accommodation portion 24 is viewed, the cross sectional area of the overlapping portion 40 is greater than the cross sectional area of the overlapping portion accommodation portion 24. It is getting bigger. Therefore, if the seal member 4 is compressed as it is, the seal member 4 which can not be completely filled in the overlapping portion accommodating portion 24 is generated. Here, the overlapping portion accommodating portion 24 includes an arranging portion 240 in which the overlapping portion 40 is disposed, and inflow portions 241 and 242 into which the compressed seal member 4 flows. The inflow portion 241 is disposed adjacent to the right of the disposition portion 240 in which the first end portion 41 is disposed. In other words, the inflow portion 241 is disposed adjacent to the first end portion 41 in the extending direction (left and right direction) of the seal member 4. The inflow portion 242 is disposed adjacent to the left of the disposition portion 240 in which the second end portion 42 is disposed. In other words, the inflow portion 242 is disposed adjacent to the second end 42 in the extending direction of the seal member 4. Therefore, when the seal member 4 is compressed, the first end portion 41 and the second end portion 42 abut in the width direction, and the surplus portion which can not be filled in the width direction flows into the inflow portions 241 and 242. Thus, as shown in FIG. 5 described above, the entire overlapping portion 40 is filled in the overlapping portion accommodation portion 24. A part of the inflow portions 241 and 242 remains without being filled with the seal member 4. Thereby, the seal structure by the seal member 4 is completed.

次に、本実施形態のシール構造およびシール部材の作用効果について説明する。本実施形態のバッテリーケース１に用いられたシール構造においては、重複部収容部２４の幅ｂを、単体部収容部２５の幅ａの和よりも小さく設計している（ｂ＜２ａ）。こうすることにより、重複部収容部２４の横断面を見た場合、重複部４０の横断面積が、重複部収容部２４の横断面積よりも大きくなるようにしている。また、重複部収容部２４は、圧縮時にシール部材４が流入するための流入部２４１、２４２を有している。これらの設計により、圧縮後状態において、重複部収容部２４の幅方向に、シール部材４が充填されない隙間が生じにくい。したがって、本実施形態のバッテリーケース１においては、高いシール性を確保することができる。   Next, the effects of the seal structure and the seal member of the present embodiment will be described. In the seal structure used in the battery case 1 of the present embodiment, the width b of the overlapping portion accommodating portion 24 is designed to be smaller than the sum of the widths a of the single portion accommodating portions 25 (b <2a). By doing this, the cross-sectional area of the overlapping portion 40 is made larger than the cross-sectional area of the overlapping portion receiving portion 24 when the cross section of the overlapping portion receiving portion 24 is viewed. Further, the overlapping portion accommodating portion 24 has inflow portions 241 and 242 for the sealing member 4 to flow in at the time of compression. Due to these designs, in the post-compression state, a gap in which the seal member 4 is not filled is unlikely to be generated in the width direction of the overlapping portion accommodating portion 24. Therefore, in the battery case 1 of the present embodiment, high sealing performance can be secured.

また、本実施形態においては、シール部材４として、一本の棒状の有端物を使用した。したがって、バッテリーケース１が大型化した場合でも、予めシール部材４を環状に成形する必要はない。この場合、シール部材４を押出成形法などにより容易に製造することができるため、製造コストを抑制することができる。   Further, in the present embodiment, a single rod-like end is used as the sealing member 4. Therefore, even when the battery case 1 is enlarged, it is not necessary to form the seal member 4 in an annular shape in advance. In this case, since the seal member 4 can be easily manufactured by an extrusion molding method or the like, the manufacturing cost can be suppressed.

また、本実施形態においては、シール部材４の重複部４０を、溝部２２の直線部２２１に配置した。この場合、湾曲部２２０に配置する場合と比較して、重複部４０に応力、歪みなどが加わりにくい。よって、シール部材４に割れなどの不具合が生じにくい。   Further, in the present embodiment, the overlapping portion 40 of the seal member 4 is disposed in the linear portion 221 of the groove portion 22. In this case, stress, strain, and the like are less likely to be applied to the overlapping portion 40 as compared to the case where the bending portion 220 is disposed. Therefore, problems such as cracking are less likely to occur in the sealing member 4.

＜第二実施形態＞
本実施形態のシール構造およびシール部材の構成と、第一実施形態のシール構造およびシール部材の構成との相違点は、溝部の重複部収容部の幅の狭め方を変更した点である。ここでは、相違点を中心に説明する。 Second Embodiment
The difference between the seal structure of the present embodiment and the configuration of the seal member and the seal structure of the first embodiment and the configuration of the seal member is that the method of narrowing the width of the overlapping portion accommodating portion of the groove portion is changed. Here, differences will be mainly described.

図７に、本実施形態におけるシール部材の重複部が配置される溝部の圧縮前状態の上面図を示す。図７は、前出図６に対応している。図７中、図６と対応する部材は同じ符号で示す。図７に示すように、溝部２２は、シール部材４の重複部４０が収容される重複部収容部２４と、単体部４３が収容される単体部収容部２５と、を有している。単体部収容部２５と重複部収容部２４との境界において、溝部２２の幅が一段内側に狭められている。このため、重複部収容部２４の幅ｂは、重複部収容部２４に連続する単体部収容部２５の幅ａの合計（ａ＋ａ＝２ａ）よりも小さい（ｂ＜２ａ）。これにより、重複部収容部２４の横断面（幅方向の断面）を見た場合、重複部４０の横断面積は、重複部収容部２４の横断面積よりも大きくなっている。   FIG. 7 is a top view of the groove portion in which the overlapping portion of the seal member in the present embodiment is disposed before compression. FIG. 7 corresponds to FIG. In FIG. 7, members corresponding to those in FIG. 6 are denoted by the same reference numerals. As shown in FIG. 7, the groove portion 22 has an overlapping portion accommodating portion 24 in which the overlapping portion 40 of the sealing member 4 is accommodated, and a single unit accommodating portion 25 in which the single unit 43 is accommodated. The width of the groove 22 is narrowed inward by one step at the boundary between the single-part housing 25 and the overlapping-part housing 24. Therefore, the width b of the overlapping portion accommodating portion 24 is smaller than the sum (a + a = 2a) of the widths a of the single unit accommodating portions 25 continuous to the overlapping portion accommodating portion 24 (b <2a). Thereby, when the cross section (cross section in the width direction) of the overlapping portion accommodating portion 24 is seen, the cross sectional area of the overlapping portion 40 is larger than the cross sectional area of the overlapping portion accommodating portion 24.

本実施形態のシール構造およびシール部材と第一実施形態のそれとは、構成が共通する部分に関しては、同様の作用効果を有する。本実施形態においては、二本の単体部収容部２５を並置して合体させる際に、重複部収容部２４についてのみ幅を狭めればよいため、溝部２２の製造が容易である。   The seal structure and the seal member of the present embodiment and those of the first embodiment have the same effects as those of the parts having the same configuration. In the present embodiment, when the two single unit accommodating portions 25 are juxtaposed and united, it is sufficient to narrow the width only for the overlapping portion accommodating portion 24, so the manufacture of the groove 22 is easy.

＜第三実施形態＞
本実施形態のシール構造およびシール部材の構成と、第一実施形態のシール構造およびシール部材の構成との相違点は、溝部における重複部の配置形態を変更した点である。ここでは、相違点を中心に説明する。 Third Embodiment
The difference between the seal structure of the present embodiment and the configuration of the seal member and the configuration of the seal structure and the seal member of the first embodiment is that the arrangement of the overlapping portion in the groove portion is changed. Here, differences will be mainly described.

図８に、本実施形態におけるシール部材の重複部が配置される溝部の圧縮前状態の上面図を示す。図８は、前出図６に対応している。図８中、図６と対応する部材は同じ符号で示す。図８に示すように、溝部２２は、重複部収容部２４と、単体部収容部２５と、を有している。重複部収容部２４は、単体部収容部２５から前側（内側）に突出して配置されている。重複部収容部２４には、シール部材４の第一端部４１と第二端部４２とが、重複部収容部２４の幅方向（左右方向）に並置されている。シール部材４は、第一端部４１と第二端部４２とが重複部収容部２４の幅方向に重なる重複部４０と、単体部収容部２５に配置される単体部４３と、を有している。重複部収容部２４の幅ｂは、重複部収容部２４に連続する単体部収容部２５の幅ａの合計（ａ＋ａ＝２ａ）よりも小さい（ｂ＜２ａ）。これにより、重複部収容部２４の横断面（幅方向の断面）を見た場合、重複部４０の横断面積は、重複部収容部２４の横断面積よりも大きくなっている。   FIG. 8 is a top view of the groove before the compression in the present embodiment, in which the overlapping portion of the seal member is disposed. FIG. 8 corresponds to FIG. In FIG. 8, members corresponding to those in FIG. 6 are denoted by the same reference numerals. As shown in FIG. 8, the groove portion 22 has an overlapping portion accommodation portion 24 and a single portion accommodation portion 25. The overlapping portion accommodating portion 24 is disposed so as to protrude to the front side (inner side) from the single portion accommodating portion 25. In the overlapping portion accommodating portion 24, the first end portion 41 and the second end portion 42 of the seal member 4 are juxtaposed in the width direction (left and right direction) of the overlapping portion accommodating portion 24. The seal member 4 has an overlapping portion 40 in which the first end portion 41 and the second end portion 42 overlap in the width direction of the overlapping portion housing portion 24 and a single portion 43 disposed in the single portion housing portion 25. ing. The width b of the overlapping portion accommodating portion 24 is smaller than the sum (a + a = 2a) of the widths a of the single portion accommodating portions 25 continuous to the overlapping portion accommodating portion 24 (b <2a). Thereby, when the cross section (cross section in the width direction) of the overlapping portion accommodating portion 24 is seen, the cross sectional area of the overlapping portion 40 is larger than the cross sectional area of the overlapping portion accommodating portion 24.

重複部収容部２４は、重複部４０が配置される配置部２４０と、圧縮されたシール部材４が流入する流入部２４１、２４２と、を有している。流入部２４１は、第一端部４１が配置されている配置部２４０の前方に隣接して配置されている。換言すると、流入部２４１は、シール部材４の延在方向（前後方向）において第一端部４１に隣接して配置されている。流入部２４２は、第二端部４２が配置されている配置部２４０の前方に隣接して配置されている。換言すると、流入部２４２は、シール部材４の延在方向において第二端部４２に隣接して配置されている。したがって、シール部材４が圧縮されると、第一端部４１および第二端部４２は幅方向に当接し、幅方向に充填しきれない余剰部分は、流入部２４１、２４２に流入する。このようにして、重複部４０の全体が重複部収容部２４に充填される。   The overlapping portion accommodating portion 24 includes an arranging portion 240 in which the overlapping portion 40 is disposed, and inflow portions 241 and 242 into which the compressed seal member 4 flows. The inflow portion 241 is disposed adjacent to the front of the disposition portion 240 in which the first end portion 41 is disposed. In other words, the inflow portion 241 is disposed adjacent to the first end portion 41 in the extending direction (front-rear direction) of the seal member 4. The inflow portion 242 is disposed adjacent to the front of the disposition portion 240 in which the second end portion 42 is disposed. In other words, the inflow portion 242 is disposed adjacent to the second end 42 in the extending direction of the seal member 4. Therefore, when the seal member 4 is compressed, the first end portion 41 and the second end portion 42 abut in the width direction, and the surplus portion which can not be filled in the width direction flows into the inflow portions 241 and 242. Thus, the entire overlapping portion 40 is filled in the overlapping portion accommodation portion 24.

本実施形態のシール構造およびシール部材と第一実施形態のそれとは、構成が共通する部分に関しては、同様の作用効果を有する。本実施形態においては、シール部材４の重複部４０が、単体部４３よりも前側（内側）に突出して配置されている。この形態によると、例えば、バッテリーケース１の内側の圧力の方が外側の圧力よりも高い場合、第一端部４１と第二端部４２との当接部に圧力が加わることになる。これにより、第一端部４１と第二端部４２との密着性が高くなり、本来のシール性に加えてセルフシール作用も発揮させることができる。したがって、本実施形態によると、シール性をより高めることができ、信頼性が向上する。   The seal structure and the seal member of the present embodiment and those of the first embodiment have the same effects as those of the parts having the same configuration. In the present embodiment, the overlapping portion 40 of the seal member 4 is disposed so as to project to the front side (inner side) than the single portion 43. According to this embodiment, for example, when the pressure inside the battery case 1 is higher than the pressure outside the battery case 1, pressure is applied to the contact portion between the first end 41 and the second end 42. Thereby, the adhesion between the first end portion 41 and the second end portion 42 is enhanced, and in addition to the original sealing performance, a self-sealing function can be exhibited. Therefore, according to the present embodiment, the sealability can be further improved, and the reliability is improved.

＜第四実施形態＞
本実施形態のシール構造およびシール部材の構成と、第二実施形態のシール構造およびシール部材の構成との相違点は、シール部材の重複部に離間部を設けた点である。ここでは、相違点を中心に説明する。 Fourth Embodiment
The difference between the seal structure of the present embodiment and the configuration of the seal member and the configuration of the seal structure and the seal member of the second embodiment is that a separation portion is provided at the overlapping portion of the seal member. Here, differences will be mainly described.

図９に、本実施形態におけるシール部材の重複部が配置される溝部の圧縮後状態の上面図を示す。図１０に、同溝部の圧縮前状態の上面図を示す。図１０は、前出図７に対応している。図１０中、図７と対応する部材は同じ符号で示す。図９に示すように、圧縮後状態において、シール部材４の重複部４０は、当接部４４と、離間部４５、４６と、を有している。当接部４４は、圧縮された第一端部４１と第二端部４２とが幅方向に当接して形成されている。離間部４５は、第一端部４１の先端が第二端部４２から幅方向に離間するように後方に傾斜して形成されている。離間部４６は、第二端部４２の先端が第一端部４１から幅方向に離間するように前方に傾斜して形成されている。シール部材４が充填されないまま残存している流入部２４１の一部は、第一端部４１の右方に隣接して配置されている。同様に、シール部材４が充填されないまま残存している流入部２４２の一部は、第二端部４２の左方に隣接して配置されている。   FIG. 9 is a top view of the compressed state of the groove portion in which the overlapping portion of the seal member in the present embodiment is disposed. FIG. 10 shows a top view of the same groove before compression. FIG. 10 corresponds to FIG. 7 described above. In FIG. 10, members corresponding to those in FIG. 7 are denoted by the same reference numerals. As shown in FIG. 9, in the post-compression state, the overlapping portion 40 of the seal member 4 includes an abutting portion 44 and separated portions 45 and 46. The abutting portion 44 is formed such that the compressed first end portion 41 and the second end portion 42 abut in the width direction. The separation portion 45 is formed to be inclined rearward so that the tip end of the first end portion 41 is separated from the second end portion 42 in the width direction. The separation portion 46 is formed to be inclined forward so that the tip end of the second end portion 42 is separated from the first end portion 41 in the width direction. A part of the inflow portion 241 remaining without being filled with the sealing member 4 is disposed adjacent to the right side of the first end portion 41. Similarly, a portion of the inflow portion 242 remaining without being filled with the seal member 4 is disposed adjacent to the left of the second end portion 42.

図１０に示すように、圧縮前状態において、溝部２２は、シール部材４の重複部４０が収容される重複部収容部２４と、単体部４３が収容される単体部収容部２５と、を有している。第一端部４１が配置される側（後側）の重複部収容部２４の右方半分は、隣接する溝部２２から幅方向に離間するように後方に傾斜して配置されている。同様に、第二端部４２が配置される側（前側）の重複部収容部２４の左方半分は、隣接する溝部２２から幅方向に離間するように前方に傾斜して配置されている。重複部収容部２４の幅ｂは、重複部収容部２４に連続する単体部収容部２５の幅ａの合計（ａ＋ａ＝２ａ）よりも小さい（ｂ＜２ａ）。これにより、重複部収容部２４の横断面（幅方向の断面）を見た場合、重複部４０の横断面積は、重複部収容部２４の横断面積よりも大きくなっている。   As shown in FIG. 10, in the pre-compression state, the groove 22 has an overlapping portion accommodating portion 24 in which the overlapping portion 40 of the sealing member 4 is accommodated, and a single unit accommodating portion 25 in which the single unit 43 is accommodated. doing. The right half of the overlapping portion accommodation portion 24 on the side (rear side) where the first end portion 41 is disposed is disposed to be inclined rearward so as to be separated from the adjacent groove portion 22 in the width direction. Similarly, the left half of the overlapping portion accommodation portion 24 on the side (front side) where the second end portion 42 is disposed is disposed to be inclined forward so as to be separated from the adjacent groove portion 22 in the width direction. The width b of the overlapping portion accommodating portion 24 is smaller than the sum (a + a = 2a) of the widths a of the single portion accommodating portions 25 continuous to the overlapping portion accommodating portion 24 (b <2a). Thereby, when the cross section (cross section in the width direction) of the overlapping portion accommodating portion 24 is seen, the cross sectional area of the overlapping portion 40 is larger than the cross sectional area of the overlapping portion accommodating portion 24.

本実施形態のシール構造およびシール部材と第二実施形態のそれとは、構成が共通する部分に関しては、同様の作用効果を有する。本実施形態においては、シール部材４の重複部４０が離間部４５、４６を有する。これにより、流入部２４１、２４２が、隣接するシール部材４から離間して配置される。シール部材４が充填されていない空間である流入部２４１、２４２を、シールラインから外して配置することにより、シールの信頼性、安定性を高めることができる。本実施形態によると、例えば、バッテリーケース１の外側と内側との圧力差が大きい場合などにも、高いシール性を確保することができる。   The seal structure of this embodiment and that of the seal member and the second embodiment have the same effects as those of the parts having the same configuration. In the present embodiment, the overlapping portion 40 of the seal member 4 has the separated portions 45 and 46. Thus, the inflow portions 241 and 242 are disposed apart from the adjacent seal member 4. The reliability and stability of the seal can be enhanced by arranging the inflow portions 241 and 242, which are spaces not filled with the seal member 4, out of the seal line. According to the present embodiment, high sealability can be ensured even when, for example, the pressure difference between the outside and the inside of the battery case 1 is large.

＜その他の形態＞
以上、本発明のシール構造およびシール部材の実施の形態について説明した。しかしながら、実施の形態は上記形態に特に限定されるものではない。当業者が行いうる種々の変形的形態、改良的形態で実施することも可能である。 <Other forms>
The embodiments of the seal structure and the seal member of the present invention have been described above. However, the embodiment is not particularly limited to the above embodiment. It is also possible to carry out in various variants and modifications which can be carried out by those skilled in the art.

上記実施形態においては、本発明を、バッテリーケースのシール構造およびシール部材として具現化した。しかし、本発明のシール構造およびシール部材は、インバーターケース、ジャンクションボックスケース、充電器ケースなどの種々の部材に適用することができる。   In the above embodiment, the present invention is embodied as a seal structure and a seal member of a battery case. However, the seal structure and the seal member of the present invention can be applied to various members such as an inverter case, a junction box case, and a charger case.

上記実施形態においては、溝部の幅を調整することにより、「圧縮前状態において、重複部の横断面積は、重複部が配置される溝部の横断面積よりも大きい」という構成を実現した。しかし、当該構成を実現する手段は限定されるものではない。例えば、シール部材の幅や厚さなどを調整して、当該構成を実現してもよい。なお、本発明のシール構造においては、流入部を含めた溝部全体におけるシール部材の充填率は、１００％以下である。   In the above embodiment, by adjusting the width of the groove, the configuration “the cross-sectional area of the overlap in the pre-compression state is larger than the cross-sectional area of the groove in which the overlap is disposed” is realized. However, the means for realizing the configuration is not limited. For example, the configuration may be realized by adjusting the width, thickness, and the like of the seal member. In the seal structure of the present invention, the filling ratio of the seal member in the entire groove including the inflow portion is 100% or less.

シール部材の材質は、エラストマーであれば特に限定されない。例えば、常温において混練可能な固体であるソリッドゴムを用いると、押出成形などにより容易にシール部材を製造することができる。ソリッドゴムとしては、エチレン−プロピレン−ジエンゴム（ＥＰＤＭ）、ニトリルゴム（ＮＢＲ）、ブタジエンゴム（ＢＲ）などの合成ゴム、天然ゴム、熱可塑性エラストマーなどが挙げられる。シール部材は、型成形、押出し成形など種々の製法で製造すればよい。架橋する場合には、熱架橋の他、電子線、紫外線などの活性エネルギー線を照射する方法が挙げられる。活性エネルギー線を用いる場合、ゴム組成物に架橋剤などを配合する必要はなく、ゴム組成物を加熱する必要もない。したがって、架橋後に洗浄する工程を省略することができ、架橋時に臭気が発生するという問題もない。また、活性エネルギー線を用いると、架橋時間が短くて済み、寸法変化が少ないという利点がある。   The material of the sealing member is not particularly limited as long as it is an elastomer. For example, when a solid rubber that is a solid that can be kneaded at normal temperature is used, the seal member can be easily manufactured by extrusion molding or the like. Examples of solid rubbers include synthetic rubbers such as ethylene-propylene-diene rubber (EPDM), nitrile rubber (NBR), butadiene rubber (BR), natural rubber, thermoplastic elastomers and the like. The seal member may be manufactured by various manufacturing methods such as molding and extrusion. In the case of crosslinking, other than thermal crosslinking, a method of irradiating active energy rays such as electron beam and ultraviolet rays may be mentioned. When using an active energy ray, it is not necessary to mix a crosslinking agent etc. with a rubber composition, and it is not necessary to heat a rubber composition. Therefore, the step of washing after crosslinking can be omitted, and there is no problem that the odor is generated at the time of crosslinking. In addition, the use of active energy rays has the advantage that the crosslinking time is short and the dimensional change is small.

シール部材の形状は、特に限定されない。全体が棒状、紐状、平板状、断面が矩形状、曲面状、凸形状、凹形状など、溝部の形状に合わせて適宜調整すればよい。また、本発明のシール構造においては、シール部材を一つだけ用いてもよく、複数を組み合わせて用いてもよい。   The shape of the seal member is not particularly limited. The whole may be appropriately adjusted in accordance with the shape of the groove, such as a bar shape, a string shape, a flat plate shape, a rectangular shape in cross section, a curved surface shape, a convex shape, or a concave shape. In the seal structure of the present invention, only one seal member may be used, or a plurality of seal members may be used in combination.

上記実施形態においては、シール部材の重複部を、溝部の直線部に配置した。しかし、シール部材の重複部を、角部などの湾曲した部分に配置しても構わない。上記第三実施形態においては、シール部材の重複部をバッテリーケースの内側に突出するように配置した。例えば、シール対象の部材の内外方向において、内側の圧力よりも外側の圧力の方が高い場合には、シール部材の重複部を外側に突出するように配置して、セルフシール作用を発揮させればよい。   In the above embodiment, the overlapping portion of the seal member is disposed in the linear portion of the groove. However, the overlapping portion of the seal member may be disposed in a curved portion such as a corner. In the said 3rd embodiment, it arrange | positioned so that the overlapping part of a sealing member might protrude inside the battery case. For example, when the pressure on the outer side is higher than the pressure on the inner side in the inward and outward directions of the member to be sealed, the overlapping portion of the seal member is arranged to protrude outward to exert a self-sealing function. Just do it.

本発明のシール構造およびシール部材は、バッテリーケース、インバーターケース、ジャンクションボックスケース、充電器ケースのシール構造およびシール部材として好適である。   The seal structure and the seal member of the present invention are suitable as a battery case, an inverter case, a junction box case, a seal structure of a charger case and a seal member.

１：バッテリーケース、２：ケース本体（第一部材）、３：蓋体（第二部材）、４：シール部材、２０：底板、２１：側壁、２２：溝部、２３：開口部、２４：重複部収容部、２５：単体部収容部、４０：重複部、４１：第一端部、４２：第二端部、４３：単体部、４４：当接部、４５、４６：離間部、２１０：上端面、２２０：湾曲部、２２１：直線部、２４０：配置部、２４１、２４２：流入部。 1: Battery case, 2: Case body (first member), 3: Lid (second member), 4: Sealing member, 20: Bottom plate, 21: Side wall, 22: Groove, 23: Opening, 24: Overlapping Part accommodation part, 25: single part accommodation part, 40: overlapping part, 41: first end, 42: second end, 43: single part, 44: abutting part, 45, 46: separating part, 210: Upper end face, 220: curved portion, 221: straight portion, 240: placement portion, 241, 242: inflow portion.

Claims (10)

第一部材と、第二部材と、該第一部材と該第二部材との間で圧縮されるエラストマー製のシール部材と、を備え、
該第一部材および該第二部材の少なくとも一方のシール界面には、該シール部材を収容する溝部が形成されており、
該シール部材は、該溝部の幅方向に複数の端部が重なる重複部を有し、
該シール部材が該溝部に配置され圧縮される前の圧縮前状態において、該重複部の横断面積は、該重複部が配置される該溝部の横断面積よりも大きいことを特徴とするシール構造。 A first member, a second member, and an elastomeric sealing member compressed between the first and second members;
At least one seal interface of the first member and the second member is formed with a groove for receiving the seal member,
The seal member has an overlapping portion in which a plurality of ends overlap in the width direction of the groove,
A seal structure characterized in that, in a pre-compression state before the seal member is disposed in the groove and compressed, a cross-sectional area of the overlap is larger than a cross-sectional area of the groove in which the overlap is disposed. 前記シール部材は、前記重複部とそれ以外の単体部とを有し、
前記溝部は、該重複部が収容される重複部収容部と、該単体部が収容される単体部収容部と、を有し、
前記圧縮前状態において、該重複部収容部は、該重複部が配置される配置部と、該シール部材の延在方向において前記端部に隣接して配置され、該シール部材が圧縮された時に該シール部材が流入する流入部と、を有する請求項１に記載のシール構造。 The seal member has the overlapping portion and the other single portion,
The groove portion has an overlapping portion receiving portion in which the overlapping portion is received, and a single portion receiving portion in which the single portion is received,
In the pre-compression state, the overlapping portion accommodating portion is disposed adjacent to the end portion in the extending direction of the sealing member and the disposition portion in which the overlapping portion is disposed, and when the sealing member is compressed. The seal structure according to claim 1, further comprising: an inflow portion into which the seal member flows. 前記第一部材と前記第二部材とが組み付けられ、前記シール部材が圧縮された圧縮後状態において、前記流入部の一部は、該シール部材が充填されていない状態で残存している請求項２に記載のシール構造。   In the compressed state where the first member and the second member are assembled and the seal member is compressed, a part of the inflow portion remains in a state where the seal member is not filled. Seal structure described in 2. 前記溝部は、前記重複部が収容される重複部収容部と、前記単体部が収容される単体部収容部と、を有し、
該重複部収容部の幅は、該重複部収容部に連続する該単体部収容部の幅の合計よりも小さい請求項１ないし請求項３のいずれかに記載のシール構造。 The groove portion has an overlapping portion receiving portion in which the overlapping portion is received, and a single portion receiving portion in which the single portion is received,
The seal structure according to any one of claims 1 to 3, wherein the width of the overlapping portion accommodating portion is smaller than the total of the widths of the single portion accommodating portions continuous to the overlapping portion accommodating portion. 前記重複部は、前記溝部の直線部に配置される請求項１ないし請求項４のいずれかに記載のシール構造。   The seal structure according to any one of claims 1 to 4, wherein the overlapping portion is disposed in a straight portion of the groove portion. 前記重複部は、隣接する前記端部同士が前記幅方向に当接する当接部と、該端部同士が該幅方向に離間する離間部と、を有する請求項１ないし請求項５のいずれかに記載のシール構造。   The said overlapping part has the contact part which the said adjacent edge parts contact | abut in the said width direction, and the isolation | separation part which these edge parts space apart in the said width direction. Seal structure described in. 前記第一部材および前記第二部材の少なくとも一方は、開口部を有する箱状を呈し、前記溝部は該開口部を囲む周縁部に形成されており、
前記シール部材は、該周縁部の全周に亘る一本の有端物である請求項１ないし請求項６のいずれかに記載のシール構造。 At least one of the first member and the second member has a box shape having an opening, and the groove is formed in a peripheral portion surrounding the opening.
The seal structure according to any one of claims 1 to 6, wherein the seal member is a single end on the entire circumference of the peripheral portion. 前記第一部材および前記第二部材の少なくとも一方は、開口部を有する箱状を呈し、前記溝部は該開口部を囲む周縁部に形成されており、
該周縁部の内外において圧力に差がある場合に、前記重複部は高圧側に突出して配置される請求項１ないし請求項７のいずれかに記載のシール構造。 At least one of the first member and the second member has a box shape having an opening, and the groove is formed in a peripheral portion surrounding the opening.
The seal structure according to any one of claims 1 to 7, wherein when there is a pressure difference between the inside and the outside of the peripheral portion, the overlapping portion is disposed so as to protrude to the high pressure side. 前記第一部材および前記第二部材は、バッテリーケース、インバーターケース、ジャンクションボックスケース、および充電器ケースのうちのいずれかを構成する部材である請求項１ないし請求項８のいずれかに記載のシール構造。   The seal according to any one of claims 1 to 8, wherein the first member and the second member constitute any one of a battery case, an inverter case, a junction box case, and a charger case. Construction. 請求項１ないし請求項９のいずれかに記載のシール構造に用いられるシール部材。   A seal member used in the seal structure according to any one of claims 1 to 9.
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JP2019133755A (en) * 2018-01-29 2019-08-08 トヨタ自動車株式会社 Power storage device
WO2023243049A1 (en) * 2022-06-16 2023-12-21 日立Astemo株式会社 Electronic control device

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JPH06188577A (en) * 1992-12-18 1994-07-08 Toshiba Corp Waterproof structure in case body for electronic equipment
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JP2019133755A (en) * 2018-01-29 2019-08-08 トヨタ自動車株式会社 Power storage device
JP6996317B2 (en) 2018-01-29 2022-02-04 トヨタ自動車株式会社 Power storage device
WO2023243049A1 (en) * 2022-06-16 2023-12-21 日立Astemo株式会社 Electronic control device

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