JP6634262B2 - Horn, anvil, ultrasonic bonding tool, and method for manufacturing power storage element. - Google Patents

Horn, anvil, ultrasonic bonding tool, and method for manufacturing power storage element. Download PDF

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JP6634262B2
JP6634262B2 JP2015204721A JP2015204721A JP6634262B2 JP 6634262 B2 JP6634262 B2 JP 6634262B2 JP 2015204721 A JP2015204721 A JP 2015204721A JP 2015204721 A JP2015204721 A JP 2015204721A JP 6634262 B2 JP6634262 B2 JP 6634262B2
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元樹 星野
元樹 星野
功 伊波
功 伊波
鈴木　孝
孝 鈴木
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GS Yuasa International 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
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Description

本発明は、金属同士の超音波接合に用いられるホーン、アンビル、ホーン及びアンビルを備える超音波接合ツール、及び、蓄電素子の製造方法に関する。   The present invention relates to a horn, an anvil, an ultrasonic bonding tool including a horn and an anvil used for ultrasonic bonding between metals, and a method for manufacturing a power storage element.

従来から、ホーンを用いて電極タブ、集電箔等の接合対象ワークを超音波接合する超音波接合装置が知られている（特許文献１参照）。前記超音波接合装置に用いられるホーンは、図９及び図１０に示すように、複数の凸部１０１を有するフェース１０２を備える。具体的に、ホーン１００のフェース１０２は、振動方向から見ると円弧状のベース形状を有している（図１０参照）。このフェース１０２には、Ｘ状の凹パターン１０３が形成されている。図９に示す例では、Ｘ状の凹パターン１０３が、振動方向に十個並び、振動直交方向に三個並ぶ。これにより、フェース１０２には、振動方向と振動直交方向とに並ぶ複数の凸部１０１が構成される。より具体的に、フェース１０２は、矩形状の輪郭を有し、この輪郭の長辺方向（振動方向）と短辺方向（振動直交方向）とに並ぶ複数の凸部１０１を有する。   2. Description of the Related Art Conventionally, an ultrasonic bonding apparatus that ultrasonically bonds a workpiece to be bonded such as an electrode tab and a current collector foil using a horn has been known (see Patent Document 1). The horn used in the ultrasonic bonding apparatus includes a face 102 having a plurality of convex portions 101, as shown in FIGS. Specifically, the face 102 of the horn 100 has an arc-shaped base shape when viewed from the vibration direction (see FIG. 10). An X-shaped concave pattern 103 is formed on the face 102. In the example shown in FIG. 9, ten X-shaped concave patterns 103 are arranged in the vibration direction and three are arranged in the vibration orthogonal direction. Thus, the face 102 has a plurality of protrusions 101 arranged in the vibration direction and the vibration orthogonal direction. More specifically, the face 102 has a rectangular outline, and has a plurality of convex portions 101 arranged in the long side direction (vibration direction) and the short side direction (vibration orthogonal direction) of the outline.

このホーン１００は、アンビルに載置された接合対象ワークをフェース１０２で押圧して超音波振動することで、接合対象ワークを接合する。このとき、複数の凸部１０１が接合対象ワークに食い込んだ状態でホーン１００が超音波振動するため、フェース１０２と接合対象ワークとの間にバリ等の異物が発生する。この異物が、接合後の接合対象ワークに付着したままだと、該接合対象ワークを組み込んだ製品等において品質、性能等を保てない場合がある。このため、前記製品等の品質等を保つためには、接合対象ワークから異物を除去しなければならないが、この異物がホーン１００（フェース１０２）と接合対象ワークとの間から四方に規則性なく排出されるため、フェース１０２の周方向の全域において排出された異物を吸引等によって除去する必要がある。このため、異物の除去作業の効率が悪かった。   The horn 100 joins the workpieces to be joined by pressing the workpieces placed on the anvil with the face 102 and performing ultrasonic vibration. At this time, since the horn 100 is ultrasonically vibrated while the plurality of protrusions 101 bite into the work to be joined, foreign matters such as burrs are generated between the face 102 and the work to be joined. If the foreign matter remains attached to the work to be joined after joining, the quality, performance, and the like may not be maintained in a product or the like incorporating the work to be joined. For this reason, in order to maintain the quality and the like of the product and the like, foreign matter must be removed from the workpiece to be joined. However, the foreign matter is not regularly distributed from the horn 100 (face 102) to the workpiece to be joined. Since the foreign matter is discharged, it is necessary to remove the foreign matter discharged in the entire area in the circumferential direction of the face 102 by suction or the like. For this reason, the efficiency of the foreign matter removal operation was poor.

特開２０１２−１２５８０１号公報JP 2012-125801 A

そこで、本発明は、超音波接合によって生じる異物を所定の方向に排出できるホーン、アンビル、超音波接合ツール、及び、蓄電素子の製造方法を提供することを課題とする。   Accordingly, an object of the present invention is to provide a horn, an anvil, an ultrasonic bonding tool, and a method for manufacturing a power storage element, which can discharge foreign substances generated by ultrasonic bonding in a predetermined direction.

本発明に係るホーンは、
第一方向に第一端と該第一端の反対側の第二端とを有する面部であってアンビルとともに接合対象物を挟み込んで超音波振動を前記接合対象物に伝達する面部を備え、
前記面部は、前記第一端と前記第二端との間において第一方向及び該第一方向と直交する第二方向に並び且つそれぞれが頂部及び基部を有する複数の凸部を有し、
前記面部における前記第一端を含む領域内で第二方向に隣り合う前記凸部同士の間が前記第一端に向けて開放し、
互いの間を前記第一端に向けて開放させた隣り合う前記凸部の前記基部同士の間隔は、前記第二端を含む領域内で第二方向に隣り合う前記凸部の前記基部同士の間隔より広い。 The horn according to the present invention,
A surface portion having a first end and a second end opposite to the first end in the first direction, and a surface portion that transmits an ultrasonic vibration to the object by sandwiching the object together with the anvil,
The surface portion has a plurality of projections arranged in the first direction and the second direction orthogonal to the first direction between the first end and the second end, and each has a top and a base,
Between the convex portions adjacent in the second direction in a region including the first end in the surface portion, is open toward the first end,
The interval between the bases of the adjacent protrusions that are opened to each other toward the first end is the distance between the bases of the protrusions adjacent to each other in the second direction within a region including the second end. Wider than the interval.

接合対象物を超音波接合するときに面部の複数の凸部が接合対象物に食い込んだ状態でホーンが超音波振動することで、面部と接合対象物との間で発生したバリ等の異物は、各凸部の基部側に移動する。このため、上記構成によれば、ホーンの面部と接合対象物との間で発生したバリ等の異物が、ホーンが超音波振動して基部にぶつかることで、基部同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動し、これにより、前記異物を面部の第一端側から排出させることができる。   When the horn is ultrasonically vibrated while the plurality of projections on the surface are biting into the object to be joined when ultrasonically joining the object to be joined, foreign substances such as burrs generated between the surface and the object to be joined are removed. Then, it moves to the base side of each convex part. For this reason, according to the above configuration, foreign matter such as burrs generated between the surface portion of the horn and the object to be joined, the horn strikes the base portion by ultrasonic vibration, and there is no space between the base portions or a narrow place. To the place where the distance is wide, whereby the foreign matter can be discharged from the first end side of the surface portion.

また、前記ホーンでは、
前記面部は、第二方向に隣り合う前記凸部の前記基部同士を接続する低部を有し、
互いの間を前記第一端に向けて開放する前記凸部の間の低部は、平面状であってもよい。 In the horn,
The surface has a lower portion connecting the bases of the protrusions adjacent in the second direction,
The lower part between the convex parts which open each other toward the first end may be planar.

かかる構成によれば、第一端を含む領域において平面状の低部によって第二方向に隣り合う凸部の基部同士の間隔が十分に確保され、これにより、面部と接合対象物との間で発生した異物を第一端側からより確実に排出させることができる。   According to this configuration, in the region including the first end, the space between the bases of the protrusions adjacent to each other in the second direction is sufficiently ensured by the planar lower portion, and thereby, between the surface and the object to be joined. The generated foreign matter can be more reliably discharged from the first end side.

また、前記ホーンでは、
互いの間を前記第一端に向けて開放させた隣り合う前記凸部の前記基部の間隔は、前記第二端側から前記第一端に向かうにつれて第二方向に拡大することが好ましい。 In the horn,
It is preferable that an interval between the bases of the adjacent protrusions that are opened to each other toward the first end increases in a second direction from the second end to the first end.

かかる構成によれば、ホーンが超音波振動したときの基部間にある異物が、基部同士の間隔の無い若しくは狭いところから前記間隔の広いところに、より円滑に移動でき、これにより、面部と接合対象物との間で発生した異物を第一端側からより効率よく排出させることができる。   According to this configuration, the foreign matter between the bases when the horn is ultrasonically vibrated can move more smoothly from a place where there is no gap or a gap between the bases to a place where the gap is wide, thereby joining with the surface part. Foreign matter generated between the target object and the target object can be more efficiently discharged from the first end side.

また、前記ホーンでは、
第二方向に並ぶ前記凸部の列は、第一方向において二列設けられ、
前記二列のうちの前記第一端側の列における凸部のそれぞれと、前記二列のうちの前記第二端側の列における凸部のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なっていてもよい。 In the horn,
The rows of the protrusions arranged in the second direction are provided in two rows in the first direction,
Each of the projections in the row on the first end side of the two rows and each of the projections in the row on the second end side of the two rows are shifted in the second direction, and At least a part may be overlapped in two-way viewing.

このように、第一端側の列を構成する各凸部と、第二端側の列を構成する各凸部とが、その一部を相手側の列の凸部間に交互に入り込ませるように配置（いわゆる千鳥状に配置）されていても、第一端側の列において互いの間を第一端に向けて開放させた隣り合う凸部の基部同士の間隔が、第二端側の列において第二方向に隣り合う凸部の基部同士の間隔より広いことで、面部と接合対象物との間で発生した異物を第一端側から排出させることができる。   In this manner, each of the protrusions forming the first end row and each of the protrusions forming the second end row alternately enter a portion between the protrusions of the mating row. (The so-called staggered arrangement), the distance between the bases of the adjacent protrusions that are opened toward the first end in the row on the first end side is the second end side Is wider than the distance between the bases of the protrusions adjacent to each other in the second direction in the second row, foreign matter generated between the surface portion and the object to be joined can be discharged from the first end side.

また、前記ホーンでは、
第二方向に並ぶ前記凸部の列は、第一方向において複数列設けられ、
第一方向に隣り合う前記凸部の列同士において、前記第一端に近い前記凸部の列における第二方向に隣り合う前記凸部の基部同士の間隔は、前記第二端に近い前記凸部の列における第二方向に隣り合う前記凸部の基部同士の間隔より大きくてもよい。 In the horn,
A plurality of rows of the protrusions arranged in the second direction are provided in the first direction,
In the rows of the protrusions adjacent in the first direction, the interval between the bases of the protrusions adjacent in the second direction in the row of the protrusions near the first end is the protrusion near the second end. The distance between the bases of the protrusions adjacent to each other in the second direction in the row of parts may be larger than the distance between the bases.

かかる構成によっても、ホーンの面部と接合対象物との間で発生したバリ等の異物が、ホーンが超音波振動して基部にぶつかることで、基部同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動するため、前記異物を面部の第一端側から排出させることができる。   Even with such a configuration, foreign matter such as burrs generated between the surface portion of the horn and the object to be joined, the horn strikes the base portion by ultrasonic vibration, so that the base portion has no or narrow space. Since the foreign matter moves to a wide place, the foreign matter can be discharged from the first end of the surface portion.

また、本発明に係るアンビルは、
第一方向に第一端と該第一端の反対側の第二端とを有する面部であって超音波振動が付与されるホーンとともに接合対象物を挟み込む面部を備え、
前記面部は、前記第一端と前記第二端との間において第一方向及び該第一方向と直交する第二方向に並び且つそれぞれが頂部及び基部を有する複数の凸部を有し、
前記面部における前記第一端を含む領域内で第二方向に隣り合う前記凸部同士の間が前記第一端に向けて開放し、
互いの間を前記第一端に向けて開放させた隣り合う前記凸部の前記基部同士の間隔は、前記第二端を含む領域内で第二方向に隣り合う前記凸部の前記基部同士の間隔より広い。 Further, the anvil according to the present invention,
A surface portion having a first end and a second end opposite to the first end in the first direction, the surface portion sandwiching the object to be joined with a horn to which ultrasonic vibration is applied,
The surface portion has a plurality of projections arranged in the first direction and the second direction orthogonal to the first direction between the first end and the second end, and each has a top and a base,
Between the convex portions adjacent in the second direction in a region including the first end in the surface portion, is open toward the first end,
The interval between the bases of the adjacent protrusions that are opened to each other toward the first end is the distance between the bases of the protrusions adjacent to each other in the second direction within a region including the second end. Wider than the interval.

接合対象物を超音波接合するときに、アンビルの面部の複数の凸部が接合対象物に食い込んだ状態で該アンビルと共に接合対象物を挟み込むホーンが超音波振動することで、接合対象物も超音波振動し、これにより、アンビルの面部と接合対象物との間でバリ等が発生する。この発生したバリ等の異物は、各凸部の基部側に移動するため、上記構成によれば、アンビルの面部と接合対象物との間で発生したバリ等の異物が、接合対象物が超音波振動することでアンビルの各凸部の基部にぶつかり、これにより、基部同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動する。その結果、上記構成のアンビルによれば、前記異物を面部の第一端側から排出させることができる。   When the object to be joined is ultrasonically joined, the horn that sandwiches the object to be joined with the anvil while the plurality of protrusions on the surface of the anvil bite into the object to be joined is ultrasonically vibrated. Due to acoustic vibration, burrs and the like are generated between the surface portion of the anvil and the object to be joined. Since the generated foreign matter such as burrs moves to the base side of each convex portion, according to the above configuration, the foreign matter such as burrs generated between the surface portion of the anvil and the object to be welded becomes extremely small when the object to be welded becomes superfluous. By vibrating the sound waves, the anvils hit the bases of the respective protrusions, whereby the bases move from a place where there is no gap or a narrow place to a place where the gap is wide. As a result, according to the anvil configured as described above, the foreign matter can be discharged from the first end of the surface.

また、本発明に係る超音波接合ツールは、
超音波振動が付与されるホーンと、
該ホーンとともに接合対象物を挟み込むアンビルと、を備え、
前記ホーン及び前記アンビルの少なくとも一方は、第一方向に第一端と該第一端の反対側の第二端とを有する面部であって前記接合対象物と接する面部を備え、
前記面部は、前記第一端と前記第二端との間において第一方向及び該第一方向と直交する第二方向に並び且つそれぞれが頂部及び基部を有する複数の凸部を有し、
前記面部における前記第一端を含む領域内で第二方向に隣り合う前記凸部同士の間が前記第一端に向けて開放し、
互いの間を前記第一端に向けて開放させた隣り合う前記凸部の前記基部同士の間隔は、前記第二端を含む領域内で第二方向に隣り合う前記凸部の前記基部同士の間隔より広い。 Further, the ultrasonic bonding tool according to the present invention,
A horn to which ultrasonic vibration is applied,
An anvil that sandwiches the object to be joined together with the horn,
At least one of the horn and the anvil includes a surface portion having a first end and a second end opposite to the first end in a first direction, and a surface portion in contact with the object to be joined,
The surface portion has a plurality of projections arranged in the first direction and the second direction orthogonal to the first direction between the first end and the second end, and each has a top and a base,
Between the convex portions adjacent in the second direction in a region including the first end in the surface portion, is open toward the first end,
The interval between the bases of the adjacent protrusions that are opened to each other toward the first end is the distance between the bases of the protrusions adjacent to each other in the second direction within a region including the second end. Wider than the interval.

接合対象物を超音波接合するときにホーン及びアンビルの少なくとも一方の面部の複数の凸部が接合対象物に食い込んだ状態でホーンが超音波振動することで、前記面部と接合対象物との間で発生したバリ等の異物は、各凸部の基部側に移動する。このため、上記構成によれば、ホーン及びアンビルの少なくとも一方の面部と接合対象物との間で発生したバリ等の異物が、ホーンの超音波振動によって基部にぶつかることで、基部同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動し、これにより、前記異物を面部の第一端側から排出させることができる。   When the horn ultrasonically vibrates in a state where the plurality of protrusions on at least one surface of the horn and the anvil bite into the object to be joined when ultrasonically joining the object to be joined, the horn and the anvil can be bonded between the surface and the object to be joined. Foreign matter such as burrs generated in the step moves to the base side of each convex portion. For this reason, according to the above configuration, a foreign substance such as a burr generated between at least one surface of the horn and the anvil and the object to be joined hits the base by ultrasonic vibration of the horn, so that the distance between the bases is reduced. The foreign matter can be discharged from the first end side of the surface portion by moving from the narrow or narrow place to the wide place.

また、本発明に係る蓄電素子の製造方法は、
重ねられた状態の電極体及び集電体をホーンとアンビルとによって挟み込んで該ホーンに超音波振動を付与することで前記電極体と前記集電体とを超音波接合すること、を備え、
前記ホーン及び前記アンビルの少なくとも一方は、第一方向に第一端と該第一端の反対側の第二端とを有する面部であって前記接合対象物と接する面部を備え、
前記面部は、前記第一端と前記第二端との間において第一方向及び該第一方向と直交する第二方向に並び且つそれぞれが頂部及び基部を有する複数の凸部を有し、
前記面部における前記第一端を含む領域内で第二方向に隣り合う前記凸部同士の間が前記第一端に向けて開放し、
互いの間を前記第一端に向けて開放させた隣り合う前記凸部の前記基部同士の間隔は、前記第二端を含む領域内で第二方向に隣り合う前記凸部の前記基部同士の間隔より広い。 Further, the method for manufacturing a power storage element according to the present invention,
Ultrasonically bonding the electrode body and the current collector by sandwiching the electrode body and the current collector in a stacked state with a horn and an anvil and applying ultrasonic vibration to the horn,
At least one of the horn and the anvil includes a surface portion having a first end and a second end opposite to the first end in a first direction, and a surface portion in contact with the object to be joined,
The surface portion has a plurality of projections arranged in the first direction and the second direction orthogonal to the first direction between the first end and the second end, and each has a top and a base,
Between the convex portions adjacent in the second direction in a region including the first end in the surface portion, is open toward the first end,
The interval between the bases of the adjacent protrusions that are opened to each other toward the first end is the distance between the bases of the protrusions adjacent to each other in the second direction within a region including the second end. Wider than the interval.

かかる構成によれば、ホーン及びアンビルの少なくとも一方の面部と電極体又は集電体との間で生じた異物が前記面部の第一端側から排出される。このため、第一端側から排出される異物を吸引等することによって該異物を効果的に除去することができ、これにより、超音波接合で生じた異物の電極体及び集電体からの十分な除去を容易に行うことができる。その結果、前記異物に起因する性能の低下等の少ない蓄電素子が得られる。   According to this configuration, the foreign matter generated between at least one of the horn and the anvil and the electrode body or the current collector is discharged from the first end of the surface. Therefore, the foreign matter can be effectively removed by, for example, sucking the foreign matter discharged from the first end side, whereby the foreign matter generated by the ultrasonic bonding can be sufficiently removed from the electrode body and the current collector. Removal can be easily performed. As a result, it is possible to obtain a power storage element in which the performance is hardly reduced due to the foreign matter.

また、前記蓄電素子の製造方法では、
前記超音波接合において、前記面部における前記第二端から第一端に向かう方向は、前記電極体において前記集電体と超音波接合される部位から該部位に最も近い該電極体の端縁に向かう方向と同じであることが好ましい。 Further, in the method for manufacturing a power storage element,
In the ultrasonic bonding, the direction from the second end to the first end of the surface portion is from the part of the electrode body that is ultrasonically bonded to the current collector to the edge of the electrode body closest to the part. Preferably, it is the same as the direction in which it heads.

かかる構成によれば、ホーン及びアンビルの少なくとも一方の面部と電極体又は集電体との間で生じた異物の排出方向が電極体の端縁に近い側を向いているため、排出された前記異物が電極体に付着し難くなり、これにより、該電極体からの前記異物のより十分な除去が可能になる。   According to such a configuration, the discharge direction of the foreign matter generated between at least one surface portion of the horn and the anvil and the electrode body or the current collector is directed to a side closer to the edge of the electrode body. Foreign matter is less likely to adhere to the electrode body, thereby enabling more sufficient removal of the foreign matter from the electrode body.

以上より、本発明によれば、超音波接合によって生じる異物を所定の方向に排出できるホーン、アンビル、超音波接合ツール、及び、蓄電素子の製造方法を提供することができる。   As described above, according to the present invention, it is possible to provide a horn, an anvil, an ultrasonic bonding tool, and a method for manufacturing a power storage element that can discharge foreign substances generated by ultrasonic bonding in a predetermined direction.

図１は、本実施形態に係る超音波接合ツールのホーンの正面図である。FIG. 1 is a front view of a horn of the ultrasonic welding tool according to the present embodiment. 図２は、前記ホーンの面部を説明するための図である。FIG. 2 is a diagram for explaining a surface portion of the horn. 図３は、前記超音波接合ツールのアンビルの正面図である。FIG. 3 is a front view of the anvil of the ultrasonic bonding tool. 図４は、前記アンビルの面部を説明するための図である。FIG. 4 is a diagram for explaining a surface portion of the anvil. 図５は、前記超音波接合ツールを用いて製造される蓄電素子の分解斜視図である。FIG. 5 is an exploded perspective view of a power storage device manufactured using the ultrasonic bonding tool. 図６は、前記超音波接合ツールによる超音波接合を説明するための模式図である。FIG. 6 is a schematic diagram for explaining ultrasonic bonding by the ultrasonic bonding tool. 図７は、前記蓄電素子の斜視図である。FIG. 7 is a perspective view of the electric storage element. 図８は、他実施形態に係る超音波接合ツールの面部を説明するための図である。FIG. 8 is a diagram for explaining a surface portion of an ultrasonic bonding tool according to another embodiment. 図９は、従来のホーンにおけるフェースの正面図である。FIG. 9 is a front view of a face of a conventional horn. 図１０は、前記フェースの側面図である。FIG. 10 is a side view of the face.

以下、本発明の一実施形態について、図１〜図７を参照しつつ説明する。尚、本実施形態の各構成部材（各構成要素）の名称は、本実施形態におけるものであり、背景技術における各構成部材（各構成要素）の名称と異なる場合がある。   Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The names of the components (components) in the present embodiment are those in the present embodiment, and may be different from the names of the components (components) in the background art.

本実施形態に係る超音波接合ツールは、図６に示すように、超音波振動が付与されるホーン２と、ホーン２と共に接合対象物を挟み込むアンビル３と、を備える。これらホーン２及びアンビル３は、超音波接合装置等に取り付けられ、金属部材同士の超音波接合に用いられる。本実施形態のホーン２及びアンビル３は、蓄電素子を製造する際の電極体と集電体とを超音波接合するのに用いられる。   As shown in FIG. 6, the ultrasonic welding tool according to the present embodiment includes a horn 2 to which ultrasonic vibration is applied, and an anvil 3 that sandwiches the welding target together with the horn 2. The horn 2 and the anvil 3 are attached to an ultrasonic bonding device or the like, and are used for ultrasonic bonding between metal members. The horn 2 and the anvil 3 of the present embodiment are used to ultrasonically join an electrode body and a current collector when manufacturing a power storage element.

ホーン２は、図１に示すように、所定の方向（図１における上下方向）に延びる柱状のホーン本体部２０と、ホーン本体部２０の先端に設けられるホーン面部（面部）２１とを、備える。   As shown in FIG. 1, the horn 2 includes a column-shaped horn body 20 extending in a predetermined direction (vertical direction in FIG. 1), and a horn surface (surface) 21 provided at a tip of the horn body 20. .

ホーン本体部２０は、超音波接合装置等に固定される部位である。本実施形態のホーン本体部２０は、例えば、矩形状の断面を有する角柱状の部位である。先端部（図１における上端部）は、ホーン２を超音波接合装置等によって超音波振動させるときの振幅方向に長いより扁平な矩形状の断面を有する。   The horn body 20 is a part fixed to an ultrasonic bonding device or the like. The horn body 20 of the present embodiment is, for example, a prismatic portion having a rectangular cross section. The tip (upper end in FIG. 1) has a flatter rectangular cross section that is longer in the amplitude direction when the horn 2 is ultrasonically vibrated by an ultrasonic bonding device or the like.

ホーン面部２１は、アンビル３と共に接合対象物を挟み込んで超音波振動を接合対象物に伝達する部位である。具体的に、ホーン面部２１は、ホーン本体部２０の先端において該ホーン本体部２０の延びる方向と直交する面方向に広がる面状の部位である。本実施形態のホーン面部２１は、図２に示すように、前記延びる方向から見て、略矩形状の輪郭を有する。詳しくは、ホーン面部２１は、所定の方向に並ぶ第一端２１１及び該第一端２１１と反対側の第二端２１２を有する。また、ホーン面部２１は、第一端２１１の一方側の端部と第二端２１２の一方側の端部とを接続する第三端２１３と、第一端２１１の他方側の端部と第二端２１２の他方側の端部とを接続する第四端２１４と、を有する。第一端２１１及び第二端２１２は、第三端２１３及び第四端２１４より長い。これら第一〜第四端２１１〜２１４によって、前記略矩形状の輪郭が形成されている。以下では、ホーン面部２１において、第一端２１１と第二端２１２とが並ぶ（対向する）方向を第一方向、第三端２１３と第四端２１４とが並ぶ（対向する）方向を第二方向、第一方向及び第二方向と直交する方向（ホーン面部２１と直交する方向）を第三方向と称する。   The horn surface portion 21 is a portion that sandwiches the object to be joined together with the anvil 3 and transmits ultrasonic vibration to the object to be joined. Specifically, the horn surface portion 21 is a planar portion that extends at a tip end of the horn body portion 20 in a plane direction orthogonal to a direction in which the horn body portion 20 extends. As shown in FIG. 2, the horn surface portion 21 of the present embodiment has a substantially rectangular contour when viewed from the extending direction. More specifically, the horn surface portion 21 has a first end 211 arranged in a predetermined direction and a second end 212 opposite to the first end 211. Further, the horn surface portion 21 includes a third end 213 connecting one end of the first end 211 and one end of the second end 212, and a second end of the first end 211. And a fourth end 214 connecting the other end of the two ends 212. The first end 211 and the second end 212 are longer than the third end 213 and the fourth end 214. The first to fourth ends 211 to 214 form the substantially rectangular outline. Hereinafter, in the horn surface section 21, the direction in which the first end 211 and the second end 212 are arranged (opposed) is the first direction, and the direction in which the third end 213 and the fourth end 214 are arranged (opposed) is the second direction. The direction orthogonal to the first direction and the second direction (the direction orthogonal to the horn surface portion 21) is referred to as a third direction.

ホーン面部２１は、第一端２１１と第二端２１２との間において第一方向及び第二方向に並び且つそれぞれが頂部５１及び基部５２を有する複数の凸部５を有する。このホーン面部２１における第一端２１１を含む領域内で第二方向に隣り合う凸部５の基部５２同士の間は、第一端２１１に向けて開放している。そして、ホーン面部２１において、互いの間を第一端２１１に向けて開放させた隣り合う凸部５の基部５２同士の間隔は、第二端２１２を含む領域内で第二方向に隣り合う凸部５の基部５２同士の間隔より広い。詳しくは、以下の通りである。   The horn surface portion 21 has a plurality of protrusions 5 arranged in a first direction and a second direction between the first end 211 and the second end 212 and each having a top 51 and a base 52. In a region including the first end 211 of the horn surface portion 21, the space between the bases 52 of the convex portions 5 adjacent in the second direction is open toward the first end 211. In the horn surface portion 21, the interval between the base portions 52 of the adjacent convex portions 5 that are opened toward each other toward the first end 211 is such that the convex portions adjacent to each other in the second direction within the region including the second end 212. It is wider than the interval between the bases 52 of the part 5. The details are as follows.

ホーン面部２１において、第二方向に並ぶ凸部５の列は、第一方向において二列設けられている。以下では、前記二列のうちの第一端２１１側の列を第一列５３と称し、第一列５３を構成する凸部５を第一凸部５３１と称する。また、前記二列のうちの第二端２１２側の列を第二列５４と称し、第二列５４を構成する凸部５を第二凸部５４１と称する。   In the horn surface portion 21, two rows of the protrusions 5 arranged in the second direction are provided in the first direction. Hereinafter, the row on the first end 211 side of the two rows is referred to as a first row 53, and the protrusions 5 forming the first row 53 are referred to as first protrusions 531. In addition, the row on the second end 212 side of the two rows is referred to as a second row 54, and the protrusions 5 forming the second row 54 are referred to as second protrusions 541.

第一凸部５３１は、四角錐形状を有する。詳しくは、第一凸部５３１は、第三方向視において、第一方向の対角線が第二方向の対角線より長い略菱形の底面を有し且つ対角線の交点と該第一凸部５３１の先端（頂点）とが第三方向に並ぶ四角錐である。尚、第一凸部５３１において、前記先端を含む部位が頂部５１であり、前記菱形の底面を含む部位が基部５２である。   The first convex portion 531 has a quadrangular pyramid shape. Specifically, the first convex portion 531 has a substantially rhombic bottom surface in which the diagonal in the first direction is longer than the diagonal in the second direction, and the point of intersection of the diagonal and the tip of the first convex portion 531 (in the third direction). (Vertices) are quadrangular pyramids arranged in the third direction. In the first convex portion 531, a portion including the tip is the top 51, and a portion including the diamond-shaped bottom is the base 52.

第一列５３は、複数の第一凸部５３１が菱形の底面の第二方向の対角同士を接するように並ぶことによって構成されている。そして、第一列５３の中央部には、第一凸部５３１一つ分の間隔が設けられている。尚、本実施形態の第一列５３における両端の第一凸部５３１は、第二方向に半分にされた形状である。   The first row 53 is configured by arranging a plurality of first protrusions 531 such that diagonals in the second direction of the diamond-shaped bottom face are in contact with each other. In the center of the first row 53, an interval corresponding to one first convex portion 531 is provided. Note that the first convex portions 531 at both ends in the first row 53 of the present embodiment have a shape halved in the second direction.

また、第二方向に隣り合う第一凸部５３１間には、第二方向に隣り合う第一凸部５３１の基部５２同士を接続する低部５５（図２においてハッチングされた部位を参照）が設けられている。即ち、ホーン面部２１は、低部５５を有する。この低部５５は、平面状である。本実施形態の第一列５３では、互いの間を第一端２１１に向けて開放させた隣り合う第一凸部５３１の基部５２同士の間隔は、第二端２１２側から第一端２１１に向かうにつれて第二方向に拡大している。このように、本実施形態の低部５５は、互いの間を第一端２１１に向けて開放する第一凸部５３１の間に設けられているため、三角形の平面状である。また、第一列５３において第二方向に第一凸部５３１一つ分の間隔が設けられた位置の低部５６（図２においてハッチングされた部位を参照）も、平面状である。この低部５６も、第一方向の中央位置から第一端２１１に向かうにつれて第二方向の幅が増大する。   Further, between the first convex portions 531 adjacent in the second direction, a low portion 55 (see a hatched portion in FIG. 2) connecting the base portions 52 of the first convex portions 531 adjacent in the second direction is provided. Is provided. That is, the horn surface portion 21 has the lower portion 55. The lower portion 55 has a planar shape. In the first row 53 of the present embodiment, the interval between the bases 52 of the adjacent first convex portions 531 that are opened toward each other toward the first end 211 is set such that the distance from the second end 212 to the first end 211 increases. It is expanding in the second direction as it goes. As described above, since the lower portion 55 of the present embodiment is provided between the first convex portions 531 that open to each other toward the first end 211, the lower portion 55 has a triangular planar shape. In addition, the lower portion 56 (see the hatched portion in FIG. 2) at a position in the first row 53 where a space corresponding to one first convex portion 531 is provided in the second direction is also planar. The width of the lower portion 56 also increases in the second direction from the central position in the first direction toward the first end 211.

第二凸部５４１は、三角錐形状を有する。詳しくは、第二凸部５４１は、第三方向視において、二辺が他の一辺より長い二等辺三角形の底面を有する三角錐である。尚、第二凸部５４１において、先端（頂点）を含む部位が頂部５１であり、前記二等辺三角形の底面を含む部位が基部５２である。   The second convex portion 541 has a triangular pyramid shape. Specifically, the second convex portion 541 is a triangular pyramid having a bottom surface of an isosceles triangle whose two sides are longer than the other side when viewed in the third direction. In the second convex portion 541, a portion including the tip (apex) is the top portion 51, and a portion including the bottom surface of the isosceles triangle is the base portion 52.

第二列５４は、複数の第二凸部５４１が二等辺三角形の底角（短辺と長辺とのなす角）同士を接し、且つ、各第二凸部５４１が第一列５３の各第一凸部５３１間に入り込んだ状態で並ぶことによって構成されている。そして、第一列５３における前記間隔が設けられた部位に配置された第二凸部５４１は、第二方向に半分にされた形状である。   In the second row 54, the plurality of second protrusions 541 contact each other at the base angles (the angle between the short side and the long side) of the isosceles triangle, and each of the second protrusions 541 is in the first row 53. The first projections 531 are arranged in a state of being inserted between the first projections 531. The second convex portion 541 arranged in the first row 53 at the portion where the interval is provided has a shape halved in the second direction.

以上のように、第一列５３における第一凸部５３１のそれぞれと、第二列５４における第二凸部５４１のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なっている。   As described above, each of the first protrusions 531 in the first row 53 and each of the second protrusions 541 in the second row 54 are displaced in the second direction and at least partially viewed in the second direction. Are overlapping.

アンビル３は、図３に示すように、超音波接合装置等に固定されるブロック状のアンビル本体部３０と、ホーン２及びアンビル３が超音波接合装置等に固定されたときにホーン面部２１と対向するアンビル面部（面部）３１と、アンビル本体部３０から延びてアンビル面部３１を支持する支持部３２と、を備える。   As shown in FIG. 3, the anvil 3 includes a block-shaped anvil main body 30 fixed to an ultrasonic bonding device or the like, and a horn surface portion 21 when the horn 2 and the anvil 3 are fixed to the ultrasonic bonding device or the like. An anvil surface portion (surface portion) 31 is provided, and a support portion 32 extending from the anvil main body portion 30 and supporting the anvil surface portion 31 is provided.

アンビル面部３１は、超音波振動が付与されるホーン２とともに接合対象物を挟み込む部位である。本実施形態のアンビル面部３１の構成は、図４に示すように、ホーン面部２１の構成と同一である。尚、図４において、ホーン面部２１と同じ構成は、同じ符号としている。   The anvil surface portion 31 is a portion that sandwiches the joining object together with the horn 2 to which ultrasonic vibration is applied. The configuration of the anvil surface portion 31 of the present embodiment is the same as the configuration of the horn surface portion 21, as shown in FIG. In FIG. 4, the same components as those of the horn surface portion 21 are denoted by the same reference numerals.

次に、ホーン２及びアンビル３を用いた蓄電素子の製造方法について図５〜図７も参照しつつ説明する。   Next, a method for manufacturing a power storage element using the horn 2 and the anvil 3 will be described with reference to FIGS.

正極と負極とがセパレータによって絶縁された状態で巻回されることで電極体１１が形成される。   The electrode body 11 is formed by winding the positive electrode and the negative electrode while being insulated by the separator.

次に、電極体１１の端部において積層されている金属箔（正極又は負極を構成する金属箔）１２と、集電体１３とが、クリップ１４を介して超音波接合される。具体的には、クリップ１４によって積層された金属箔１２を挟み込み、この挟み込んだ状態のクリップ１４に集電体１３の一部を重ねた状態で、図６に示すように、超音波接合装置等に取り付けられたホーン２とアンビル３との間（詳しくは、対向するホーン面部２１とアンビル面部３１との間）に配置される。このとき、ホーン面部２１及びアンビル面部３１における第二端２１２側から第一端２１１に向かう方向が支持部３２からアンビル本体部３０に向かう方向（図６における右向き）と一致するように、ホーン２及びアンビル３が超音波接合装置等に取り付けられる。ホーン２は、この姿勢で超音波接合装置等に取り付けられることで、ホーン面部２１の第二方向と一致する方向に該超音波接合装置等によって超音波振動させられる。   Next, the metal foil (metal foil constituting the positive electrode or the negative electrode) 12 laminated at the end of the electrode body 11 and the current collector 13 are ultrasonically bonded via the clip 14. Specifically, the metal foil 12 laminated by the clip 14 is sandwiched, and a part of the current collector 13 is overlapped with the clip 14 in the sandwiched state, as shown in FIG. Is disposed between the horn 2 and the anvil 3 (specifically, between the opposing horn surface 21 and the anvil surface 31). At this time, the horn 2 is moved so that the direction from the second end 212 side to the first end 211 of the horn surface portion 21 and the anvil surface portion 31 matches the direction from the support portion 32 to the anvil body portion 30 (to the right in FIG. 6). And the anvil 3 are attached to an ultrasonic bonding apparatus or the like. The horn 2 is attached to the ultrasonic bonding device or the like in this posture, and is ultrasonically vibrated by the ultrasonic bonding device or the like in a direction coinciding with the second direction of the horn surface portion 21.

この超音波接合時において、ホーン２及びアンビル３に対して電極体１１の端縁に近い側（図６に示す例では、ホーン２及びアンビル３の右側）において、超音波接合時に面部（ホーン面部２１、アンビル面部３１）と接合対象物（本実施形態の例では、電極体１１、集電体１３等）との間で生じたバリ等の異物の吸引が行われる。   At the time of this ultrasonic bonding, a surface portion (a horn surface portion) on the side near the edge of the electrode body 11 with respect to the horn 2 and the anvil 3 (the right side of the horn 2 and the anvil 3 in the example shown in FIG. 6). 21, foreign substances such as burrs generated between the joining object (the electrode body 11, the current collector 13 and the like in the example of the present embodiment) are performed.

続いて、ホーン２とアンビル３との間隔を狭めて集電体１３、クリップ１４、積層された金属箔１２を所定の圧力で挟み、ホーン２を超音波振動させる。この状態では、ホーン面部２１及びアンビル面部３１における第二端２１２から第一端２１１に向かう方向が、電極体１１において集電体１３と超音波接合される部位から該部位に最も近い該電極体１１の端縁に向かう方向と同じである。   Subsequently, the gap between the horn 2 and the anvil 3 is reduced to sandwich the current collector 13, the clip 14, and the laminated metal foil 12 at a predetermined pressure, and the horn 2 is ultrasonically vibrated. In this state, the direction from the second end 212 to the first end 211 in the horn surface portion 21 and the anvil surface portion 31 is closest to the portion of the electrode body 11 that is ultrasonically bonded to the current collector 13 in the electrode body 11. 11 is the same as the direction toward the edge.

このように超音波接合された電極体１１と集電体１３とは、外部端子１５と共に矩形板状の蓋板１６に組み付けられる。そして、集電体１３が絶縁部材１７によって絶縁された（覆われた）状態で扁平な有底角筒状のケース本体１８に収容され、蓋板１６の周縁部とケース本体１８の開口周縁部とが溶接され、蓄電素子１０が完成する（図７参照）。   The electrode body 11 and the current collector 13 thus ultrasonically bonded are assembled together with the external terminals 15 on a rectangular plate-shaped cover plate 16. Then, the current collector 13 is accommodated in a flat bottomed rectangular cylindrical case main body 18 in a state of being insulated (covered) by the insulating member 17, and the peripheral edge of the cover plate 16 and the peripheral edge of the opening of the case main body 18. Are welded to complete the energy storage device 10 (see FIG. 7).

以上のホーン２、アンビル３、超音波接合ツール１によれば、接合対象物を超音波接合するときに面部（ホーン面部２１、アンビル面部３１）の複数の凸部５が接合対象物に食い込んだ状態でホーン２が超音波振動することで、面部２１、３１と接合対象物との間で発生したバリ等の異物は、各凸部５の基部５２側に移動する。このため、上記構成によれば、面部２１、３１と接合対象物との間で発生したバリ等の異物が、ホーン２の超音波振動によって基部５２にぶつかることで、基部５２同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動し、これにより、前記異物を面部２１、３１の第一端２１１側から排出させることができる。   According to the horn 2, the anvil 3, and the ultrasonic welding tool 1, the plurality of projections 5 of the surface portions (the horn surface portion 21 and the anvil surface portion 31) bite into the welding target when the welding target is ultrasonically bonded. When the horn 2 is ultrasonically vibrated in this state, foreign matters such as burrs generated between the surface portions 21 and 31 and the object to be joined move to the base 52 side of each convex portion 5. For this reason, according to the above configuration, foreign matter such as burrs generated between the surface portions 21 and 31 and the object to be joined hits the base portion 52 by the ultrasonic vibration of the horn 2, so that there is no space between the base portions 52. Alternatively, the foreign matter can be moved from the narrow place to the wide place, so that the foreign matter can be discharged from the first end 211 side of the surface portions 21 and 31.

また、本実施形態の面部２１、３１において第一端２１１と隣接する低部５５は、平面状である。このため、第一端２１１を含む領域において平面状の低部５５によって第二方向に隣り合う凸部５の基部５２同士の間隔が十分に確保され、これにより、面部２１、３１と接合対象物との間で発生した異物を第一端２１１側からより確実に排出させることができる。   Further, in the surface portions 21 and 31 of the present embodiment, the lower portion 55 adjacent to the first end 211 is flat. For this reason, in the region including the first end 211, the space between the base portions 52 of the convex portions 5 adjacent in the second direction is sufficiently ensured by the planar low portion 55, and thereby, the surface portions 21, 31 and the object to be joined are formed. Can be more reliably discharged from the first end 211 side.

また、本実施形態の面部２１、３１では、互いの間を第一端２１１に向けて開放させた隣り合う凸部５（第一凸部５３１）の基部５２の間隔は、第二端２１２側から第一端２１１に向かうにつれて第二方向に拡大している。このため、ホーン２が超音波振動したときの基部５２間にある異物が、基部５２同士の間隔の無い若しくは狭いところから前記間隔の広いところに、より円滑に移動でき、これにより、面部２１、３１と接合対象物との間で発生した異物を第一端２１１側からより効率よく排出させることができる。   In the surface portions 21 and 31 of the present embodiment, the interval between the base portions 52 of the adjacent convex portions 5 (first convex portions 531) that are opened toward each other toward the first end 211 is the second end 212 side. From the first end 211 in the second direction. For this reason, the foreign matter between the bases 52 when the horn 2 is ultrasonically vibrated can move more smoothly from a place where there is no gap or a gap between the bases 52 to a place where the gap is wide, and thereby, the surface 21, Foreign matter generated between the base material 31 and the joining target can be more efficiently discharged from the first end 211 side.

また、本実施形態の面部２１、３１のように、第一列５３における第一凸部５３１のそれぞれと、第二列５４における第二凸部５４１のそれぞれとが、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なっている（即ち、各第一凸部５３１と、各第二凸部５４１とが、その一部を相手側の列の凸部間に交互に入り込ませるような千鳥状に配置されていても）、第一列５３において互いの間を第一端に向けて開放させた隣り合う第一凸部５３１の基部５２同士の間隔が、第二列５４において第二方向に隣り合う第二凸部５４１の基部５２同士の間隔より広いことで、面部２１、３１と接合対象物との間で発生した異物を第一端２１１側から排出させることができる。   Further, like the surface portions 21 and 31 of the present embodiment, each of the first protrusions 531 in the first row 53 and each of the second protrusions 541 in the second row 54 are shifted in the second direction, and , At least partly overlaps in the second direction view (that is, each first convex portion 531 and each second convex portion 541 cause a part thereof to alternately enter between the convex portions of the mating row). Even if they are arranged in a zigzag pattern), the interval between the bases 52 of the adjacent first convex portions 531 that are opened toward the first end in the first row 53 is the same as that in the second row 54. Since the distance between the bases 52 of the second protrusions 541 adjacent to each other in the second direction is wider than the distance between the bases 52, the foreign matter generated between the surface portions 21 and 31 and the object to be joined can be discharged from the first end 211 side.

また、本実施形態のホーン２及びアンビル３を用いた蓄電素子１０の製造方法によれば、ホーン２及びアンビル３の少なくとも一方の面部２１、３１と電極体１１又は集電体１３等の接合対象物との間で生じた異物が面部２１、３１の第一端２１１側から排出される。このため、第一端２１１側から排出される異物を吸引等することによって該異物を効果的に除去することができ、これにより、超音波接合で生じた異物の電極体１１及び集電体１３等の接合対象物からの十分な除去を容易に行うことができる。その結果、前記異物に起因する性能の低下等の少ない蓄電素子１０が得られる。   In addition, according to the method of manufacturing the electric storage device 10 using the horn 2 and the anvil 3 of the present embodiment, at least one of the surface portions 21 and 31 of the horn 2 and the anvil 3 is bonded to the electrode body 11 or the current collector 13 or the like. Foreign matter generated between the object and the object is discharged from the first end 211 of the surface portions 21 and 31. Therefore, the foreign matter can be effectively removed by suctioning the foreign matter discharged from the first end 211 side, and thereby, the electrode body 11 and the current collector 13 of the foreign matter generated by the ultrasonic bonding can be removed. , Etc., can be easily removed from the object to be joined. As a result, it is possible to obtain the power storage device 10 with little deterioration in performance due to the foreign matter.

また、前記蓄電素子の製造方法では、ホーン２及びアンビル３の少なくとも一方の面部２１、３１と電極体１１又は集電体１３との間で生じた異物の排出方向が電極体１１の端縁に近い側を向いているため、排出された前記異物が電極体１１等に付着し難くなり、これにより、該電極体１１からの前記異物のより十分な除去が可能になる。   Further, in the method for manufacturing the electric storage element, the discharge direction of the foreign matter generated between at least one of the surface portions 21 and 31 of the horn 2 and the anvil 3 and the electrode body 11 or the current collector 13 is set at the edge of the electrode body 11. Since it faces the near side, the discharged foreign matter is less likely to adhere to the electrode body 11 and the like, and thereby, the foreign matter from the electrode body 11 can be more sufficiently removed.

尚、本発明の蓄電素子は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。例えば、ある実施形態の構成に他の実施形態の構成を追加することができ、また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることができる。さらに、ある実施形態の構成の一部を削除することができる。   It should be noted that the electric storage device of the present invention is not limited to the above embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention. For example, the configuration of another embodiment can be added to the configuration of one embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, a part of the configuration of an embodiment can be deleted.

上記実施形態のホーン面部２１とアンビル面部３１とは、同じ構成であるが、この構成に限定されない。ホーン面部２１とアンビル面部３１とのいずれか一方の面部が上記実施形態の構成を有していれば、他方の面部は、異なる構成であってもよい。   The horn surface portion 21 and the anvil surface portion 31 of the above embodiment have the same configuration, but are not limited to this configuration. If one of the horn surface portion 21 and the anvil surface portion 31 has the configuration of the above-described embodiment, the other surface portion may have a different configuration.

面部（ホーン面部２１、アンビル面部３１）が有する凸部５の具体的な形状は、限定されない。上記実施形態の凸部５は、三角錐及び四角錐であるが、円錐、多角錘等であってもよい。即ち、ホーン２の凸部５は、ホーン２が超音波振動したときに、該超音波振動を接合対象物に伝達できる形状等であればよく、アンビル３の凸部５は、ホーン２が超音波振動したときに、接合対象物が動くのを抑えるように該接合対象物に食い込む形状であればよい。   The specific shape of the convex portion 5 included in the surface portions (the horn surface portion 21 and the anvil surface portion 31) is not limited. The protrusion 5 in the above embodiment is a triangular pyramid or a quadrangular pyramid, but may be a cone, a polygonal pyramid, or the like. That is, the convex portion 5 of the horn 2 may have any shape or the like capable of transmitting the ultrasonic vibration to the object to be joined when the horn 2 ultrasonically vibrates. Any shape may be used as long as the shape is such that it bites into the joining object so as to suppress the movement of the joining object when sonic vibration occurs.

また、面部２１、３１において複数の凸部５のそれぞれは、全て同じ形状でもよく、異なる形状であってもよい。   Further, each of the plurality of convex portions 5 in the surface portions 21 and 31 may have the same shape or different shapes.

また、上記実施形態の面部２１、３１において、第二方向に並ぶ凸部５の列は、二列であるが、この構成に限定されない。第二方向に並ぶ凸部５の列は、三列以上であってもよい。   In the surface portions 21 and 31 of the above embodiment, the number of rows of the convex portions 5 arranged in the second direction is two, but is not limited to this configuration. The rows of the convex portions 5 arranged in the second direction may be three or more rows.

また、上記実施形態の面部２１、３１では、複数の凸部５が隙間無く、いわゆる千鳥状に配置されているが、この構成に限定されない。第一端２１１を含む領域における第二方向に隣り合う凸部５（基部５２）同士の間隔が、第二端２１２を含む領域における第二方向に隣り合う凸部５（基部５２）同士の間隔より大きければ、隣り合う凸部５間に隙間が設けられていてもよい。   Further, in the surface portions 21 and 31 of the above embodiment, the plurality of convex portions 5 are arranged in a so-called staggered manner without any gap, but the present invention is not limited to this configuration. The interval between the convex portions 5 (base portions 52) adjacent in the second direction in the region including the first end 211 is the interval between the convex portions 5 (base portions 52) adjacent in the second direction in the region including the second end 212. If it is larger, a gap may be provided between adjacent convex portions 5.

この場合、図８に示すように、第一方向に隣り合う凸部５の列同士において、第一端２１１に近い凸部５の列における第二方向に隣り合う凸部５の基部同士の間隔は、第二端２１２に近い凸部５の列における第二方向に隣り合う凸部５の基部同士の間隔より大きい構成が好ましい。かかる構成によれば、面部２１、３１と接合対象物との間で発生したバリ等の異物が、ホーン２の超音波振動によって基部５２にぶつかることで、基部５２同士の間隔の無い若しくは狭いところから前記間隔の広いところに移動するため、前記異物を面部２１、３１の第一端２１１側から効率よく排出させることができる。   In this case, as shown in FIG. 8, between the rows of the protrusions 5 adjacent in the first direction, the distance between the bases of the protrusions 5 adjacent in the second direction in the row of the protrusions 5 near the first end 211. Is preferably larger than the distance between the bases of the protrusions 5 adjacent in the second direction in the row of the protrusions 5 near the second end 212. According to such a configuration, a foreign substance such as a burr generated between the surface portions 21 and 31 and the object to be joined hits the base portion 52 by the ultrasonic vibration of the horn 2, so that there is no space or a narrow space between the base portions 52. , The foreign matter can be efficiently discharged from the first end 211 side of the surface portions 21, 31.

上記実施形態の低部５５、５６は、平面状であるが、この構成に限定されない。低部５５、５６は、周囲に配置される凸部５より低ければ、他の形状であってもよい。   Although the lower portions 55 and 56 in the above embodiment are planar, the present invention is not limited to this configuration. The lower portions 55 and 56 may have other shapes as long as the lower portions 55 and 56 are lower than the convex portions 5 arranged around the lower portions 55 and 56.

１…超音波接合ツール、２…ホーン、２０…ホーン本体部、２１…ホーン面部（面部）、２１１…第一端、２１２…第二端、２１３…第三端、２１４…第四端、３…アンビル、３０…アンビル本体部、３１…アンビル面部、３２…支持部、５…凸部、５１…頂部、５２…基部、５３…第一列、５３１…第一凸部、５４…第二列、５４１…第二凸部、５５、５６…低部、１０…蓄電素子、１１…電極体、１２…金属箔、１３…集電体、１４…クリップ、１５…外部端子、１６…蓋板、１７…絶縁部材、１８…ケース本体、１００…ホーン、１０１…凸部、１０２…フェース、１０３…凹パターン   DESCRIPTION OF SYMBOLS 1 ... Ultrasonic welding tool, 2 ... Horn, 20 ... Horn main body part, 21 ... Horn surface part (surface part), 211 ... First end, 212 ... Second end, 213 ... Third end, 214 ... Fourth end, 3 ... anvil, 30 ... anvil body part, 31 ... anvil surface part, 32 ... support part, 5 ... convex part, 51 ... top part, 52 ... base part, 53 ... first row, 531, ... first convex part, 54 ... second row , 541: second convex portion, 55, 56: low portion, 10: power storage element, 11: electrode body, 12: metal foil, 13: current collector, 14: clip, 15: external terminal, 16: lid plate, 17 insulating member, 18 case body, 100 horn, 101 convex part, 102 face, 103 concave pattern

Claims (5)

第一方向に第一端と該第一端の反対側の第二端とを有する面部であってアンビルとともに接合対象物を挟み込んで超音波振動を前記接合対象物に伝達する面部を備え、
前記面部は、それぞれが頂部及び基部を有する複数の凸部を前記第一端と前記第二端との間に有し、
前記複数の凸部は、第一方向と直交する第二方向に並ぶ凸部の列が第一方向に二列となるように配置され、
前記二列の凸部の列のうちの第一端側の凸部の列における前記凸部のそれぞれと、前記二列の凸部の列のうちの第二端側の凸部の列における前記凸部のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なり、
前記面部は、前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士を接続する平面状の低部を複数有し、
前記複数の低部のそれぞれは、前記第二端側から前記第一端に向かうにつれて第二方向に拡大し、
前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第一端における間隔は、前記第二端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第二端における間隔より広い、
ホーン。 A surface portion having a first end and a second end opposite to the first end in the first direction, and a surface portion that transmits an ultrasonic vibration to the object by sandwiching the object together with the anvil,
The surface has a plurality of protrusions which their respective has a top and base between said second end and said first end,
The plurality of protrusions are arranged such that a row of protrusions arranged in a second direction orthogonal to the first direction becomes two rows in the first direction,
Each of the convex portions in the row of convex portions on the first end side of the two rows of convex portions, and the row of convex portions on the second end side of the two rows of convex portions. Each of the protrusions is displaced in the second direction, and at least partially overlaps when viewed in the second direction,
The surface portion has a plurality of planar low portions connecting the base portions of the convex portions adjacent in the second direction in the row of the convex portions on the first end side,
Each of the plurality of lower portions is enlarged in the second direction from the second end side toward the first end,
Interval in the first end of said base portion between adjacent pairs of the projections in the second direction in the row of the convex portion of the first end side, adjacent to the second direction in the row of the convex portion of the second end side Wider than the interval at the second end between the bases of the protrusions,
Horn. 第一方向に第一端と該第一端の反対側の第二端とを有する面部であって超音波振動が付与されるホーンとともに接合対象物を挟み込む面部を備え、
前記面部は、それぞれが頂部及び基部を有する複数の凸部を前記第一端と前記第二端との間に有し、
前記複数の凸部は、第一方向と直交する第二方向に並ぶ凸部の列が第一方向に二列となるように配置され、
前記二列の凸部の列のうちの第一端側の凸部の列における前記凸部のそれぞれと、前記二列の凸部の列のうちの第二端側の凸部の列における前記凸部のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なり、
前記面部は、前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士を接続する平面状の低部を複数有し、
前記複数の低部のそれぞれは、前記第二端側から前記第一端に向かうにつれて第二方向に拡大し、
前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第一端における間隔は、前記第二端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第二端における間隔より広い、アンビル。 A surface portion having a first end and a second end opposite to the first end in the first direction, the surface portion sandwiching the object to be joined with a horn to which ultrasonic vibration is applied,
The surface has a plurality of protrusions which their respective has a top and base between said second end and said first end,
The plurality of protrusions are arranged such that a row of protrusions arranged in a second direction orthogonal to the first direction becomes two rows in the first direction,
Each of the convex portions in the row of convex portions on the first end side of the two rows of convex portions, and the row of convex portions on the second end side of the two rows of convex portions. Each of the protrusions is displaced in the second direction, and at least partially overlaps when viewed in the second direction,
The surface portion has a plurality of planar low portions connecting the base portions of the convex portions adjacent in the second direction in the row of the convex portions on the first end side,
Each of the plurality of lower portions is enlarged in the second direction from the second end side toward the first end,
Interval in the first end of said base portion between adjacent pairs of the projections in the second direction in the row of the convex portion of the first end side, adjacent to the second direction in the row of the convex portion of the second end side An anvil wider than a distance between the bases of the protrusions at the second end . 超音波振動が付与されるホーンと、
該ホーンとともに接合対象物を挟み込むアンビルと、を備え、
前記ホーン及び前記アンビルの少なくとも一方は、第一方向に第一端と該第一端の反対側の第二端とを有する面部であって前記接合対象物と接する面部を備え、
前記面部は、それぞれが頂部及び基部を有する複数の凸部を前記第一端と前記第二端との間に有し、
前記複数の凸部は、第一方向と直交する第二方向に並ぶ凸部の列が第一方向に二列となるように配置され、
前記二列の凸部の列のうちの第一端側の凸部の列における前記凸部のそれぞれと、前記二列の凸部の列のうちの第二端側の凸部の列における前記凸部のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なり、
前記面部は、前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士を接続する平面状の低部を複数有し、
前記複数の低部のそれぞれは、前記第二端側から前記第一端に向かうにつれて第二方向に拡大し、
前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第一端における間隔は、前記第二端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第二端における間隔より広い、超音波接合ツール。 A horn to which ultrasonic vibration is applied,
An anvil that sandwiches the object to be joined together with the horn,
At least one of the horn and the anvil includes a surface portion having a first end and a second end opposite to the first end in a first direction, and a surface portion in contact with the object to be joined,
The surface has a plurality of protrusions which their respective has a top and base between said second end and said first end,
The plurality of protrusions are arranged such that a row of protrusions arranged in a second direction orthogonal to the first direction becomes two rows in the first direction,
Each of the convex portions in the row of convex portions on the first end side of the two rows of convex portions, and the row of convex portions on the second end side of the two rows of convex portions. Each of the protrusions is displaced in the second direction, and at least partially overlaps when viewed in the second direction,
The surface portion has a plurality of planar low portions connecting the base portions of the convex portions adjacent in the second direction in the row of the convex portions on the first end side,
Each of the plurality of lower portions is enlarged in the second direction from the second end side toward the first end,
Interval in the first end of said base portion between adjacent pairs of the projections in the second direction in the row of the convex portion of the first end side, adjacent to the second direction in the row of the convex portion of the second end side An ultrasonic bonding tool wider than an interval between the bases of the protrusions at the second end . 重ねられた状態の電極体及び集電体をホーンとアンビルとによって挟み込んで該ホーンに超音波振動を付与することで前記電極体と前記集電体とを超音波接合すること、を備え、
前記ホーン及び前記アンビルの少なくとも一方は、第一方向に第一端と該第一端の反対側の第二端とを有する面部であって前記接合対象物と接する面部を備え、
前記面部は、それぞれが頂部及び基部を有する複数の凸部を前記第一端と前記第二端との間に有し、
前記複数の凸部は、第一方向と直交する第二方向に並ぶ凸部の列が第一方向に二列となるように配置され、
前記二列の凸部の列のうちの第一端側の凸部の列における前記凸部のそれぞれと、前記二列の凸部の列のうちの第二端側の凸部の列における前記凸部のそれぞれとは、第二方向にずれ、且つ、第二方向視において少なくとも一部が重なり、
前記面部は、前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士を接続する平面状の低部を複数有し、
前記複数の低部のそれぞれは、前記第二端側から前記第一端に向かうにつれて第二方向に拡大し、
前記第一端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第一端における間隔は、前記第二端側の凸部の列において第二方向に隣り合う前記凸部の前記基部同士の前記第二端における間隔より広い、蓄電素子の製造方法。 Ultrasonically bonding the electrode body and the current collector by sandwiching the electrode body and the current collector in a stacked state with a horn and an anvil and applying ultrasonic vibration to the horn,
At least one of the horn and the anvil includes a surface portion having a first end and a second end opposite to the first end in a first direction, and a surface portion in contact with the object to be joined,
The surface has a plurality of protrusions which their respective has a top and base between said second end and said first end,
The plurality of protrusions are arranged such that a row of protrusions arranged in a second direction orthogonal to the first direction becomes two rows in the first direction,
Each of the convex portions in the row of convex portions on the first end side of the two rows of convex portions, and the row of convex portions on the second end side of the two rows of convex portions. Each of the protrusions is displaced in the second direction, and at least partially overlaps when viewed in the second direction,
The surface portion has a plurality of planar low portions connecting the base portions of the convex portions adjacent in the second direction in the row of the convex portions on the first end side,
Each of the plurality of lower portions is enlarged in the second direction from the second end side toward the first end,
Interval in the first end of said base portion between adjacent pairs of the projections in the second direction in the row of the convex portion of the first end side, adjacent to the second direction in the row of the convex portion of the second end side A method for manufacturing a power storage element, wherein the distance between the bases of the protrusions at the second end is wider than the distance between the bases. 前記超音波接合において、前記面部における前記第二端から第一端に向かう方向は、前記電極体において前記集電体と超音波接合される部位から該部位に最も近い該電極体の端縁に向かう方向と同じである、請求項４に記載の蓄電素子の製造方法。 In the ultrasonic bonding, the direction from the second end to the first end of the surface portion is from the part of the electrode body that is ultrasonically bonded to the current collector to the edge of the electrode body closest to the part. The method for manufacturing a power storage device according to claim 4 , wherein the direction is the same as the direction toward the power storage device.
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