JP7475915B2 - Ultrasonic bonding method and ultrasonic bonding structure - Google Patents

Ultrasonic bonding method and ultrasonic bonding structure Download PDF

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JP7475915B2
JP7475915B2 JP2020052700A JP2020052700A JP7475915B2 JP 7475915 B2 JP7475915 B2 JP 7475915B2 JP 2020052700 A JP2020052700 A JP 2020052700A JP 2020052700 A JP2020052700 A JP 2020052700A JP 7475915 B2 JP7475915 B2 JP 7475915B2
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joint
ultrasonic bonding
pair
energy
protrusion
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JP2021151726A (en
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俊治 鯵坂
一輝 本多
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Stanley Electric Co Ltd
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Stanley Electric Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B29C66/12241—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment the two joint-segments being butt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24225—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being elliptical

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Description

本発明は、超音波接合方法及び超音波接合構造に関する。 The present invention relates to an ultrasonic bonding method and an ultrasonic bonding structure.

従来より、一方の部材と他方の部材との間の接合部を超音波接合する超音波接合方法がある（例えば、下記特許文献１を参照。）。超音波接合方法では、一方の部材の接合部となる面にエネルギーダイレクタ（以下、「ＥＤ」という。）と呼ばれる突起部を設け、このＥＤを介して一方の部材と他方の部材との間の接合部を突き合わせた状態とし、この接合部に超音波振動を印加する。これにより、超音波振動がＥＤに集中的に加わるため、短時間で溶融温度まで発熱したＥＤを他方の部材の接合部となる面に溶着することが可能である。 Conventionally, there has been an ultrasonic bonding method for ultrasonically bonding a joint between one member and another member (see, for example, Patent Document 1 below). In the ultrasonic bonding method, a protrusion called an energy director (hereinafter referred to as "ED") is provided on the surface of one member that will be the joint, and the joint between the one member and the other member is butted together via this ED, and ultrasonic vibrations are applied to this joint. As a result, the ultrasonic vibrations are applied intensively to the ED, so that the ED, which has heated up to its melting temperature in a short time, can be welded to the surface that will be the joint of the other member.

特開２０１３－２３３７２９号公報JP 2013-233729 A

ところで、上述した超音波接合方法を用いて接合された樹脂製品の中には、例えば灯体などの自動車部品がある。自動車部品は、高いＧ（重力加速度）が働く環境下で使用されるため、接合部に対してあらゆる方向から繰り返し応力が加わることになる。 Incidentally, among the resin products that are joined using the ultrasonic joining method described above are automobile parts such as lamp bodies. Automobile parts are used in environments where high G (gravitational acceleration) is present, so stress is repeatedly applied to the joints from all directions.

一方、接合部に加わる応力は、均一ではなく、ＥＤの端部に集中することがほとんどである。このため、ＥＤに均一に応力が加わる想定で接合部の設計を行うと、この接合部に加わる応力を実際よりも低く見積もってしまう可能性がある。その結果、接合部の保持性能が不十分である場合、使用中に接合部に不具合が生じる可能性が高くなってしまう。 On the other hand, the stress applied to the joint is not uniform, but is almost always concentrated at the end of the ED. For this reason, if the joint is designed assuming that stress is applied uniformly to the ED, the stress applied to the joint may be estimated lower than it actually is. As a result, if the joint's retention performance is insufficient, there is a high possibility that malfunctions will occur in the joint during use.

本発明は、このような従来の事情に鑑みて提案されたものであり、保持性能に優れた超音波接合方法及び超音波接合構造を提供することを目的とする。 The present invention was proposed in light of the above-mentioned conventional circumstances, and aims to provide an ultrasonic bonding method and ultrasonic bonding structure with excellent retention performance.

上記目的を達成するために、本発明は以下の手段を提供する。
〔１〕 一方の部材と他方の部材との間の接合部を超音波接合する超音波接合方法であって、
前記一方の部材の前記接合部となる面に、リング状又は略リング状に突出されたエネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部と、前記第１の段差凸部を含む面を突出させた第２の段差凸部とを設け、
前記他方の部材の前記接合部となる面に、前記第１の段差凸部と対向する面を凹ませた段差凹部を設け、
前記エネルギーダイレクタを介して前記一方の部材と前記他方の部材との間の接合部を突き合わせた状態とし、前記接合部に超音波振動を印加することによって、前記エネルギーダイレクタを前記他方の部材の前記接合部となる面に全周又は略全周に亘って溶着することを特徴とする超音波接合方法。
〔２〕 一方の部材と他方の部材との間の接合部を超音波接合する超音波接合方法であって、
前記一方の部材の前記接合部となる面に、リング状又は略リング状に突出されると共に、互いに隣り合う一対のエネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させると共に、前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する第１の段差凸部とを設け、
前記他方の部材の前記接合部となる面に、前記第１の段差凸部と対向する面を凹ませた段差凹部を設け、
前記エネルギーダイレクタを介して前記一方の部材と前記他方の部材との間の接合部を突き合わせた状態とし、前記接合部に超音波振動を印加することによって、前記エネルギーダイレクタを前記他方の部材の前記接合部となる面に全周又は略全周に亘って溶着することを特徴とする超音波接合方法。
〔３〕 前記エネルギーダイレクタの内側に臨む位置に、前記一方の部材と前記他方の部材との何れかを貫通する孔部を設けることを特徴とする前記〔１〕又は〔２〕に記載の超音波接合方法。
〔４〕 前記孔部を前記一方の部材に設けることを特徴とする前記〔３〕に記載の超音波接合方法。
〔５〕 前記一方の部材の前記接合部となる面に、互いに隣り合う一対の前記エネルギーダイレクタを設け、
前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する前記第１の段差凸部を設けることを特徴とする前記〔１〕、〔３〕、〔４〕の何れか一項に記載の超音波接合方法。
〔６〕 一方の部材と他方の部材との間の接合部を超音波接合した超音波接合構造であって、
前記接合部は、前記一方の部材と前記他方の部材との互いに向かい合う面の間で全周又は略全周に亘って溶着されたリング状又は略リング状のエネルギーダイレクタを有し、
前記一方の部材の前記接合部となる面には、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部と、前記第１の段差凸部を含む面を突出させた第２の段差凸部とが設けられ、
前記他方の部材の前記接合部となる面には、前記第１の段差凸部と対向する面を凹ませた段差凹部が設けられていることを特徴とする超音波接合構造。
〔７〕 一方の部材と他方の部材との間の接合部を超音波接合した超音波接合構造であって、
前記接合部は、前記一方の部材と前記他方の部材との互いに向かい合う面の間で全周又は略全周に亘って溶着されたリング状又は略リング状のエネルギーダイレクタを有し、
前記一方の部材の前記接合部となる面には、互いに隣り合う一対の前記エネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部が設けられ、
前記他方の部材の前記接合部となる面には、前記第１の段差凸部と対向する面を凹ませた段差凹部が設けられ、
前記第１の段差凸部は、前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有することを特徴とする超音波接合構造。
〔８〕 前記接合部は、前記エネルギーダイレクタの内側に臨む位置に、前記一方の部材と前記他方の部材との何れかを貫通した孔部を有することを特徴とする前記〔６〕又は〔７〕に記載の超音波接合構造。
〔９〕 前記孔部が前記一方の部材に設けられていることを特徴とする前記〔８〕に記載の超音波接合構造。
〔１０〕 前記一方の部材の前記接合部となる面には、互いに隣り合う一対の前記エネルギーダイレクタが設けられ、
前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する前記第１の段差凸部が設けられていることを特徴とする前記〔６〕、〔８〕、〔９〕の何れか一項に記載の超音波接合構造。 In order to achieve the above object, the present invention provides the following means.
[1] An ultrasonic bonding method for ultrasonically bonding a bonded portion between one member and another member, comprising:
a first step protrusion having a protruding surface including the energy director and a second step protrusion having a protruding surface including the first step protrusion, the first step protrusion being provided on a surface of the one member that will be the joint;
a step recess portion formed by recessing a surface of the other member that serves as the joining portion and that faces the first step protrusion portion;
an ultrasonic bonding method comprising: butting the joint between the one member and the other member via the energy director; and applying ultrasonic vibrations to the joint, thereby welding the energy director to the entire or nearly entire circumference of the surface of the other member that will become the joint.
[2] An ultrasonic bonding method for ultrasonically bonding a bonding portion between one member and another member, comprising:
a first step projection having a ring-shaped or substantially ring-shaped protrusion on a surface of the one member that is to be the joint, the first step projection having a protruding surface including a pair of adjacent energy directors, the first step projection being continuous between the pair of energy directors and having a narrowed shape between the pair of energy directors;
a step recess portion formed by recessing a surface of the other member that serves as the joining portion and that faces the first step protrusion portion;
an ultrasonic bonding method comprising: butting the joint between the one member and the other member via the energy director; and applying ultrasonic vibrations to the joint, thereby welding the energy director to the entire or nearly entire circumference of the surface of the other member that will become the joint.
[ 3 ] The ultrasonic bonding method according to [1] or [2], characterized in that a hole portion penetrating either the one member or the other member is provided at a position facing the inside of the energy director.
[ 4 ] The ultrasonic bonding method according to [ 3 ], wherein the hole is provided in the one of the members .
[ 5 ] A pair of adjacent energy directors are provided on the surface of the one member that will be the joint,
The ultrasonic bonding method according to any one of [1], [3] and [4], characterized in that the first step convex portion is provided so as to be continuous between the pair of energy directors and to have a narrowed shape between the pair of energy directors .
[ 6 ] An ultrasonic bonding structure in which a bonding portion between one member and another member is ultrasonically bonded,
the joint has a ring-shaped or substantially ring-shaped energy director welded over an entire or substantially entire circumference between the opposing surfaces of the one member and the other member,
a first step convex portion having a surface including the energy director protruding therefrom and a second step convex portion having a surface including the first step convex portion protruding therefrom on a surface of the one member that will be the joining portion;
An ultrasonic bonding structure, characterized in that a surface of the other member that becomes the bonding portion is provided with a stepped recess portion that is recessed in a surface facing the first stepped protrusion portion .
[7] An ultrasonic bonding structure in which a bonding portion between one member and another member is ultrasonically bonded,
the joint has a ring-shaped or substantially ring-shaped energy director welded over an entire or substantially entire circumference between the opposing surfaces of the one member and the other member,
a pair of adjacent energy directors and a first step protrusion that protrudes a surface including the energy directors are provided on the surface of the one member that is to be the joint;
a step recess is provided on a surface of the other member that serves as the joint portion, the step recess being formed by recessing a surface facing the first step protrusion,
2. An ultrasonic bonding structure comprising: a first step projection that is continuous between the pair of energy directors and has a constricted shape between the pair of energy directors.
[ 8 ] The ultrasonic bonding structure described in [6] or [7], characterized in that the bonding portion has a hole portion penetrating either the one member or the other member at a position facing the inside of the energy director.
[ 9 ] The ultrasonic bonding structure according to [ 8 ], characterized in that the hole is provided in the one of the members .
[ 10 ] A pair of adjacent energy directors are provided on the surface of the one member that becomes the joint,
The ultrasonic bonding structure described in any one of [6], [8], and [9], characterized in that the first step convex portion is provided so as to be continuous between the pair of energy directors and to have a narrowed shape between the pair of energy directors .

以上のように、本発明によれば、保持性能に優れた超音波接合方法及び超音波接合構造を提供することが可能である。 As described above, the present invention makes it possible to provide an ultrasonic bonding method and an ultrasonic bonding structure with excellent retention performance.

本発明の一実施形態に係る超音波接合方法を説明するための図であり、（Ａ）は一方の部材を示す平面図、（Ｂ）は一方の部材を示す断面図である。1A and 1B are diagrams for explaining an ultrasonic bonding method according to an embodiment of the present invention, in which (A) is a plan view showing one of the members, and (B) is a cross-sectional view showing the other of the members. 本発明の一実施形態に係る超音波接合方法を説明するための図であり、（Ａ）は他方の部材を示す平面図、（Ｂ）は他方の部材を示す断面図である。5A and 5B are diagrams for explaining an ultrasonic bonding method according to an embodiment of the present invention, in which (A) is a plan view showing the other member, and (B) is a cross-sectional view showing the other member. 本発明の一実施形態に係る超音波接合方法を説明するための図であり、（Ａ）は一方部材と他方の部材とを突き合わせる前の状態を示す側面図、（Ｂ）はその断面図である。1A and 1B are diagrams for explaining an ultrasonic bonding method according to an embodiment of the present invention, in which (A) is a side view showing a state before one member and another member are butted together, and (B) is a cross-sectional view thereof. 本発明の一実施形態に係る超音波接合方法を説明するための図であり、（Ａ）は一方部材と他方の部材とを突き合わせた状態を示す側面図、（Ｂ）はその断面図である。1A and 1B are diagrams for explaining an ultrasonic bonding method according to an embodiment of the present invention, in which (A) is a side view showing a state in which one member and another member are butted together, and (B) is a cross-sectional view thereof. 一方の部材の一具体例を示す平面図である。FIG. 4 is a plan view showing a specific example of one of the members. 図５に示す一方の部材の接合部を示す平面図である。6 is a plan view showing a joint portion of one of the members shown in FIG. 5 . 図５に示す一方の部材の接合部を示す斜視図である。FIG. 6 is a perspective view showing a joint portion of one of the members shown in FIG. 5 .

以下、本発明の実施形態について、図面を参照して詳細に説明する。
なお、以下の説明で用いる図面においては、各構成要素を見やすくするため、構成要素によって寸法の縮尺を異ならせて示すことがあり、各構成要素の寸法比率などが実際と同じであるとは限らない。 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
In the drawings used in the following description, in order to make each component easier to see, the dimensions of the components may be shown on different scales, and the dimensional ratios of each component may not necessarily be the same as in reality.

（超音波接合方法）
先ず、本発明の一実施形態に係る超音波接合方法について、図１～図７を参照しながら説明する。 (Ultrasonic bonding method)
First, an ultrasonic bonding method according to an embodiment of the present invention will be described with reference to FIGS.

なお、図１は、本実施形態の超音波接合方法を説明するための図であり、（Ａ）は一方の部材１０を示す平面図、（Ｂ）は一方の部材１０を示す断面図である。図２は、本実施形態の超音波接合方法を説明するための図であり、（Ａ）は他方の部材２０を示す平面図、（Ｂ）は他方の部材２０を示す断面図である。図３は、本実施形態の超音波接合方法を説明するための図であり、（Ａ）は一方部材１０と他方の部材２０とを突き合わせる前の状態を示す側面図、（Ｂ）はその断面図である。図４は、本実施形態の超音波接合方法を説明するための図であり、（Ａ）は一方部材１０と他方の部材２０とを突き合わせた状態を示す側面図、（Ｂ）はその断面図である。図５は、一方の部材１０の一具体例を示す平面図である。図６は、図５に示す一方の部材１０の接合部３０を示す平面図である。図７は、図５に示す一方の部材１０の接合部３０を示す斜視図である。 1 is a diagram for explaining the ultrasonic bonding method of this embodiment, where (A) is a plan view showing one member 10, and (B) is a cross-sectional view showing one member 10. FIG. 2 is a diagram for explaining the ultrasonic bonding method of this embodiment, where (A) is a plan view showing the other member 20, and (B) is a cross-sectional view showing the other member 20. FIG. 3 is a diagram for explaining the ultrasonic bonding method of this embodiment, where (A) is a side view showing the state before the one member 10 and the other member 20 are butted together, and (B) is a cross-sectional view thereof. FIG. 4 is a diagram for explaining the ultrasonic bonding method of this embodiment, where (A) is a side view showing the state in which the one member 10 and the other member 20 are butted together, and (B) is a cross-sectional view thereof. FIG. 5 is a plan view showing one specific example of one member 10. FIG. 6 is a plan view showing the joint 30 of one member 10 shown in FIG. 5. FIG. 7 is a perspective view showing the joint 30 of one member 10 shown in FIG. 5.

本実施形態の超音波接合方法は、図１（Ａ），（Ｂ）に示す一方の部材１０と、図２（Ａ），（Ｂ）に示す他方の部材２０との間の接合部３０を超音波接合する。なお、一方の部材１０及び他方の部材２０の材質については、例えば熱可塑性樹脂を挙げることができるが、超音波接合が適用可能なものでれば特に限定されるものではない。 The ultrasonic bonding method of this embodiment ultrasonically bonds a joint 30 between one member 10 shown in Fig. 1 (A) and (B) and the other member 20 shown in Fig. 2 (A) and (B). Note that the material of the one member 10 and the other member 20 can be, for example, a thermoplastic resin, but is not particularly limited as long as ultrasonic bonding is applicable.

一方の部材１０は、図１（Ａ），（Ｂ）に示すように、接合部３０となる面（以下、「一方の接合面」という。）１０ａに、互いに隣り合う一対のエネルギーダイレクタ（以下、「ＥＤ」という。）１１と、一対のＥＤ１１を含む面（以下、「第１の段差面」という。）１２ａを突出させた第１の段差凸部１２と、第１の段差凸部１２を含む面（以下、「第２の段差面」という。）１３ａを突出させた第２の段差凸部１３とを有している。 As shown in Figures 1(A) and (B), one member 10 has, on a surface (hereinafter referred to as "one joint surface") 10a that will be the joint 30, a pair of adjacent energy directors (hereinafter referred to as "EDs") 11, a first step convex portion 12 that protrudes from a surface (hereinafter referred to as the "first step surface") 12a that includes the pair of EDs 11, and a second step convex portion 13 that protrudes from a surface (hereinafter referred to as the "second step surface") 13a that includes the first step convex portion 12.

ＥＤ１１は、第１の段差面１２ａからリング状又は略リング状（本実施形態では平面視で円形状）に突出して設けられている。また、ＥＤ１１は、その先端に向かって尖形となる形状を有している。 ED11 is provided so as to protrude from the first step surface 12a in a ring or approximately ring shape (in this embodiment, it is circular in plan view). ED11 also has a shape that becomes pointed toward its tip.

また、一方の部材１０は、ＥＤ１１の内側に臨む孔部１４を有している。孔部１４は、一方の部材１０を貫通して設けられている。なお、孔部１４の形状については、特に限定されるものではない。本実施形態では、孔部１４として、例えばＥＤ１１の中心部を貫通する丸孔が設けられている。 The first member 10 has a hole 14 facing the inside of the ED 11. The hole 14 is provided penetrating the first member 10. The shape of the hole 14 is not particularly limited. In this embodiment, the hole 14 is, for example, a round hole penetrating the center of the ED 11.

第１の段差凸部１２は、平面視で矩形状の第１の段差面１２ａを有して、第２の段差面１３から突出して設けられている。第１の段差面１２ａは、一対のＥＤ１１の周囲を囲むように一対のＥＤ１１の間で連続して設けられている。 The first step protrusion 12 has a first step surface 12a that is rectangular in plan view and is provided so as to protrude from the second step surface 13. The first step surface 12a is provided continuously between the pair of EDs 11 so as to surround the periphery of the pair of EDs 11.

第２の段差凸部１３は、平面視で矩形状の第２の段差面１３ａを有して、一方の接合面１０ａから突出して設けられている。第２の段差面１３ａは、第１の段差面１２ａの周囲を囲むように設けられている。 The second step protrusion 13 has a second step surface 13a that is rectangular in plan view and is provided to protrude from one of the joining surfaces 10a. The second step surface 13a is provided so as to surround the periphery of the first step surface 12a.

他方の部材２０は、図２（Ａ），（Ｂ）に示すように、接合部３０となる面（以下、「他方の接合面」という。）２０ａに、第１の段差凸部１２と対向する面（以下、「底面」という。）２１ａを凹ませた段差凹部２１を有している。 As shown in Figures 2(A) and (B), the other member 20 has a step recess 21 on the surface 20a that forms the joint 30 (hereinafter referred to as the "other joint surface"), where the surface 21a that faces the first step protrusion 12 (hereinafter referred to as the "bottom surface") is recessed.

段差凹部２１は、平面視で矩形状の底面２１ａを有して、他方の接合面２０ａ側を第１の段差凸部１２に対応して凹ませた形状を有している。 The step recess 21 has a rectangular bottom surface 21a in plan view, and the other joining surface 20a side is recessed to correspond to the first step protrusion 12.

一方の部材１０と他方の部材２０との間の接合部３０を超音波接合する際は、図３（Ａ），（Ｂ）に示すように、一方の部材１０の一方の接合面１０ａと、他方の部材２０の他方の接合面２０ａとを互いに向かい合わせた状態とする。 When ultrasonically bonding the joint 30 between one member 10 and the other member 20, one joining surface 10a of the one member 10 and the other joining surface 20a of the other member 20 are placed facing each other, as shown in Figures 3(A) and (B).

この状態から、図４（Ａ），（Ｂ）に示すように、一対のＥＤ１１を介して一方の部材１０と他方の部材２０との間の接合部３０を突き合わせた状態とする。 From this state, as shown in Figures 4(A) and (B), the joint 30 between one member 10 and the other member 20 is butted together via a pair of EDs 11.

このとき、段差凹部２１ａに第１の段差凸部１２が係合された状態となっている。また、他方の接合面２０ａに第２の段差面１３ａが当接した状態となっている。さらに、一対のＥＤ１１が段差凹部２１の底面２１ａに当接した状態となっている。 At this time, the first step protrusion 12 is engaged with the step recess 21a. The second step surface 13a is in contact with the other joining surface 20a. Furthermore, the pair of EDs 11 are in contact with the bottom surface 21a of the step recess 21.

この状態から、一方の部材１０の一方の接合面１０ａとは反対側の面に、超音波接合機のホーンＨを押し当てながら、このホーンＨを介して接合部３０に超音波振動を印加する。これにより、超音波振動が一対のＥＤ１１に集中的に加わるため、短時間で溶融温度まで発熱した一対のＥＤ１１を他方の部材２０の他方の接合面２０ａに全周に亘って溶着することができる。 From this state, the horn H of the ultrasonic welding machine is pressed against the surface of one of the members 10 opposite the one of the joining surfaces 10a, while ultrasonic vibrations are applied to the joining portion 30 via the horn H. This causes the ultrasonic vibrations to be concentrated on the pair of EDs 11, so that the pair of EDs 11, which have heated up to their melting temperature in a short time, can be welded to the other joining surface 20a of the other member 20 along their entire circumference.

本実施形態の本実施形態の超音波接合方法では、上述したＥＤ１１を他方の部材２０の他方の接合面２０ａに全周に亘って溶着する際に、ＥＤ１１の内側にある空気を孔部１４を通じて脱気することが可能である。これにより、ＥＤ１１の内側で空気が膨張し、接合部３０に応力が加わることを防ぐことが可能である。 In the ultrasonic bonding method of this embodiment, when the above-mentioned ED 11 is welded to the other bonding surface 20a of the other member 20 over the entire circumference, it is possible to evacuate the air inside the ED 11 through the hole 14. This makes it possible to prevent the air from expanding inside the ED 11 and applying stress to the bonding portion 30.

（超音波接合構造）
次に、本実施形態の超音波接合方法を用いて接合された超音波接合構造について説明する。 (Ultrasonic bonding structure)
Next, an ultrasonic bonding structure bonded using the ultrasonic bonding method of this embodiment will be described.

本実施形態の超音波接合構造は、上述した超音波接合方法を用いて接合された接合部３０を備えている。接合部３０では、一方の部材１０と他方の部材２０との互いに向かい合う接合面１０ａ，２０ａの間が、上述したリング状（円形状）に突出されたＥＤ１１を介して溶着されている。 The ultrasonic bonding structure of this embodiment includes a bonding portion 30 that is bonded using the ultrasonic bonding method described above. In the bonding portion 30, the bonding surfaces 10a, 20a of one member 10 and the other member 20 that face each other are welded via the ED 11 that protrudes in a ring shape (circular shape) described above.

これにより、本実施形態の超音波接合構造では、接合部３０において優れた保持性能を得ることが可能である。すなわち、上述したリング状（円形状）に突出されたＥＤ１１を用いた接合部３０では、あらゆる方向から加わる応力を分散させる能力に優れている。 As a result, the ultrasonic bonding structure of this embodiment can provide excellent retention performance at the bonded portion 30. In other words, the bonded portion 30 using the ED 11 protruding in the ring shape (circular shape) described above has an excellent ability to disperse stress applied from all directions.

また、本実施形態の超音波接合構造では、上述した隣り合う一対のＥＤ１１を設けることによって、接合部３０における保持性能を更に高めることが可能である。特に、接合部３０に加わる回転ねじれ方向の応力を剪断方向の応力に変化させることで、この接合部３０における保持性能を高めることが可能である。 In addition, in the ultrasonic bonding structure of this embodiment, by providing a pair of adjacent EDs 11 as described above, it is possible to further improve the retention performance of the bonded portion 30. In particular, by changing the rotational-torsional stress applied to the bonded portion 30 into a shear stress, it is possible to improve the retention performance of this bonded portion 30.

次に、図５～図７に示す一方の部材１００の一具体例について説明する。
なお、図５は、一方の部材１００の構成を示す平面図である。図６は、一方の部材１００の接合部３０Ａを示す平面図である。図７は、一方の部材１００の接合部３０Ａを示す斜視図である。また、以下の説明では、上記一方の部材１０と同等の部位については、説明を省略すると共に、図面において同じ符号を付すものとする。 Next, a specific example of one member 100 shown in FIGS. 5 to 7 will be described.
Fig. 5 is a plan view showing the configuration of one member 100. Fig. 6 is a plan view showing joint 30A of one member 100. Fig. 7 is a perspective view showing joint 30A of one member 100. In the following description, description of the same parts as those of the one member 10 will be omitted and the same reference numerals will be used in the drawings.

本実施形態の一方の部材１００は、自動車部品を構成する樹脂製品の一部であり、その周囲には、複数の接合部３０Ａが並んで設けられている。 In this embodiment, one member 100 is part of a resin product that constitutes an automobile part, and multiple joints 30A are arranged around its periphery.

複数の接合部３０Ａは、第１の段差凸部１２の形状が異なる以外は、上記接合部３０と基本的に同じ構成を有している。すなわち、この接合部３０Ａでは、図６及び図７に示すように、一対のＥＤ１１の間で第１の段差凸部１２が平面視で括れた形状を有している。 The multiple joints 30A have basically the same configuration as the joint 30, except that the shape of the first step protrusion 12 is different. That is, in this joint 30A, as shown in Figures 6 and 7, the first step protrusion 12 has a constricted shape in plan view between a pair of EDs 11.

また、他方の部材２０の段差凹部２１は、第２の段差凸部１３に対応して凹ませた形状とする。これにより、一方の部材１００と他方の部材２０との間の接合部３０Ａを突き合わせた際に、段差凹部２１ａに第２の段差凸部１３が係合された状態となる。 The step recess 21 of the other member 20 is recessed to correspond to the second step protrusion 13. As a result, when the joint 30A between the one member 100 and the other member 20 is butted together, the second step protrusion 13 is engaged with the step recess 21a.

このとき、段差凹部２１の底面２１ａと第２の段差凸部１３の第２の段差面１３ａとの係合される面積を増やすことで、超音波接合時における接合部３０Ａでの一方の部材１００と他方の部材２０との位置ずれを抑制することが可能である。一方、ＥＤ１１の周囲における第１の段差面１２ａの面積を小さくすることが可能である。 At this time, by increasing the area of engagement between the bottom surface 21a of the step recess 21 and the second step surface 13a of the second step protrusion 13, it is possible to suppress misalignment between the one member 100 and the other member 20 at the joining portion 30A during ultrasonic joining. On the other hand, it is possible to reduce the area of the first step surface 12a around the ED 11.

なお、本発明は、上記実施形態のものに必ずしも限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、上記実施形態では、一方の部材１０，１００に孔部１４を設けた構成となっているが、ＥＤ１１の内側に臨む位置に、他方の部材２０を貫通する孔部を設けた構成とすることも可能である。 The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, a hole 14 is provided in one of the members 10, 100, but it is also possible to provide a hole that penetrates the other member 20 at a position facing the inside of the ED 11.

これにより、上述したＥＤ１１を他方の部材２０の他方の接合面２０ａに全周に亘って溶着する際に、ＥＤ１１の内側にある空気を他方の部材２０側の孔部を通じて脱気することが可能である。これにより、ＥＤ１１の内側で空気が膨張し、接合部３０，３０Ａに応力が加わることを防ぐことが可能である。 As a result, when the above-mentioned ED11 is welded to the other joint surface 20a of the other member 20 over the entire circumference, the air inside the ED11 can be degassed through the holes on the other member 20 side. This makes it possible to prevent the air from expanding inside the ED11 and applying stress to the joints 30, 30A.

また、上記ＥＤ１１については、上述した円形状に限らず、例えば楕円形状や長円形状などのリング状に突出された形状とした場合でも、保持部３０，３０Ａにおいて優れた保持性能を得ることが可能である。 In addition, the ED 11 is not limited to the circular shape described above, and even if it is a ring-shaped protrusion such as an elliptical or oval shape, excellent holding performance can be obtained in the holding parts 30 and 30A.

また、ＥＤ１１は、略リング状として、上述したリング状に突出された一部を切り欠く形状や、リング状に突出された一部の高さを低くした形状などであってもよい。 ED11 may also be roughly ring-shaped, with a portion of the ring-shaped protrusion cut out as described above, or with a portion of the ring-shaped protrusion with a reduced height.

接合部３０，３０Ａでは、このような略リング状に突出されたＥＤ１１によって、一方の部材１０と他方の部材２０との互いに向かい合う接合面１０ａ，２０ａの間が全周に亘って溶着された場合、上述したリング状に突出されたＥＤ１１を用いた場合と同様に、接合部３０，３０Ａにおいて優れた保持性能を得ることが可能である。 In the joints 30, 30A, when the mutually facing joint surfaces 10a, 20a of one member 10 and the other member 20 are welded around the entire circumference by the ED 11 protruding in a roughly ring shape, it is possible to obtain excellent holding performance in the joints 30, 30A, similar to the case where the above-mentioned ring-shaped protruding ED 11 is used.

一方、略リング状に突出されたＥＤ１１を用いた場合、溶着後のＥＤ１１の一部が開放されることもある。この場合、ＥＤ１１の全周のうち９０％以上が閉じた状態であればよい。また、溶着後のＥＤ１１における開放部分の幅が、１ｍｍ以下であればよい。 On the other hand, when an ED11 that protrudes in a roughly ring shape is used, a portion of the ED11 may be open after welding. In this case, it is sufficient that 90% or more of the entire circumference of the ED11 is closed. Also, it is sufficient that the width of the open portion of the ED11 after welding is 1 mm or less.

これにより、一方の部材１０と他方の部材２０との互いに向かい合う接合面１０ａ，２０ａの間が略全周に亘って溶着される場合でも、保持部３０，３０Ａにおいて優れた保持性能を得ることが可能である。 As a result, even when the opposing joining surfaces 10a, 20a of one member 10 and the other member 20 are welded over substantially the entire circumference, it is possible to obtain excellent holding performance in the holding parts 30, 30A.

１０…一方の部材 １０ａ…一方の接合面 １１…エネルギーダイレクタ（ＥＤ） １２…第１の段差凸部 １２ａ…第１の段差面 １３…第２の段差凸部 １３ａ…第２の段差面 １４…孔部 ２０…他方の部材 ２０ａ…他方の接合面 ２１…段差凹部 ２１ａ…底面 ３０，３０Ａ…接合部 １００…一方の部材 10...One member 10a...One joint surface 11...Energy director (ED) 12...First step convex portion 12a...First step surface 13...Second step convex portion 13a...Second step surface 14...Hole 20...Other member 20a...Other joint surface 21...Step concave portion 21a...Bottom surface 30, 30A...Joint 100...One member

Claims (10)

一方の部材と他方の部材との間の接合部を超音波接合する超音波接合方法であって、
前記一方の部材の前記接合部となる面に、リング状又は略リング状に突出されたエネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部と、前記第１の段差凸部を含む面を突出させた第２の段差凸部とを設け、
前記他方の部材の前記接合部となる面に、前記第１の段差凸部と対向する面を凹ませた段差凹部を設け、
前記エネルギーダイレクタを介して前記一方の部材と前記他方の部材との間の接合部を突き合わせた状態とし、前記接合部に超音波振動を印加することによって、前記エネルギーダイレクタを前記他方の部材の前記接合部となる面に全周又は略全周に亘って溶着することを特徴とする超音波接合方法。 1. An ultrasonic bonding method for ultrasonically bonding a joint between one member and another member, comprising:
a first step protrusion having a protruding surface including the energy director and a second step protrusion having a protruding surface including the first step protrusion, the first step protrusion being provided on a surface of the one member that will be the joint;
a step recess portion formed by recessing a surface of the other member that serves as the joining portion and that faces the first step protrusion portion;
an ultrasonic bonding method comprising: butting the joint between the one member and the other member via the energy director; and applying ultrasonic vibrations to the joint, thereby welding the energy director to the entire or nearly entire circumference of the surface of the other member that will become the joint. 一方の部材と他方の部材との間の接合部を超音波接合する超音波接合方法であって、
前記一方の部材の前記接合部となる面に、リング状又は略リング状に突出されると共に、互いに隣り合う一対のエネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させると共に、前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する第１の段差凸部とを設け、
前記他方の部材の前記接合部となる面に、前記第１の段差凸部と対向する面を凹ませた段差凹部を設け、
前記エネルギーダイレクタを介して前記一方の部材と前記他方の部材との間の接合部を突き合わせた状態とし、前記接合部に超音波振動を印加することによって、前記エネルギーダイレクタを前記他方の部材の前記接合部となる面に全周又は略全周に亘って溶着することを特徴とする超音波接合方法。 1. An ultrasonic bonding method for ultrasonically bonding a joint between one member and another member, comprising:
a first step projection having a ring-shaped or substantially ring-shaped protrusion on a surface of the one member that is to be the joint, the first step projection having a protruding surface including a pair of adjacent energy directors, the first step projection being continuous between the pair of energy directors and having a narrowed shape between the pair of energy directors;
a step recess portion formed by recessing a surface of the other member that serves as the joining portion and that faces the first step protrusion portion;
an ultrasonic bonding method comprising: butting the joint between the one member and the other member via the energy director; and applying ultrasonic vibrations to the joint, thereby welding the energy director to the entire or nearly entire circumference of the surface of the other member that will become the joint. 前記エネルギーダイレクタの内側に臨む位置に、前記一方の部材と前記他方の部材との何れかを貫通する孔部を設けることを特徴とする請求項１又は２に記載の超音波接合方法。 3. The ultrasonic bonding method according to claim 1, further comprising providing a hole penetrating either the one member or the other member at a position facing an inside of the energy director. 前記孔部を前記一方の部材に設けることを特徴とする請求項３に記載の超音波接合方法。 4. The ultrasonic bonding method according to claim 3 , wherein the hole is provided in the one of the members. 前記一方の部材の前記接合部となる面に、互いに隣り合う一対の前記エネルギーダイレクタを設け、
前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する前記第１の段差凸部を設けることを特徴とする請求項１、３、４の何れか一項に記載の超音波接合方法。 a pair of adjacent energy directors are provided on a surface of the one member that will be the joint;
5. The ultrasonic bonding method according to claim 1, wherein the first stepped convex portion is continuous between the pair of energy directors and has a constricted shape between the pair of energy directors. 一方の部材と他方の部材との間の接合部を超音波接合した超音波接合構造であって、
前記接合部は、前記一方の部材と前記他方の部材との互いに向かい合う面の間で全周又は略全周に亘って溶着されたリング状又は略リング状のエネルギーダイレクタを有し、
前記一方の部材の前記接合部となる面には、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部と、前記第１の段差凸部を含む面を突出させた第２の段差凸部とが設けられ、
前記他方の部材の前記接合部となる面には、前記第１の段差凸部と対向する面を凹ませた段差凹部が設けられていることを特徴とする超音波接合構造。 An ultrasonic bonding structure in which a bonding portion between one member and another member is ultrasonically bonded,
the joint has a ring-shaped or substantially ring-shaped energy director welded over the entire or substantially entire circumference between the opposing surfaces of the one member and the other member,
a first step convex portion having a surface including the energy director protruding therefrom and a second step convex portion having a surface including the first step convex portion protruding therefrom on a surface of the one member that will be the joining portion;
An ultrasonic bonding structure, characterized in that a surface of the other member that becomes the bonding portion is provided with a stepped recess portion that is recessed in a surface facing the first stepped protrusion portion . 一方の部材と他方の部材との間の接合部を超音波接合した超音波接合構造であって、
前記接合部は、前記一方の部材と前記他方の部材との互いに向かい合う面の間で全周又は略全周に亘って溶着されたリング状又は略リング状のエネルギーダイレクタを有し、
前記一方の部材の前記接合部となる面には、互いに隣り合う一対の前記エネルギーダイレクタと、前記エネルギーダイレクタを含む面を突出させた第１の段差凸部が設けられ、
前記他方の部材の前記接合部となる面には、前記第１の段差凸部と対向する面を凹ませた段差凹部が設けられ、
前記第１の段差凸部は、前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有することを特徴とする超音波接合構造。 An ultrasonic bonding structure in which a bonding portion between one member and another member is ultrasonically bonded,
the joint has a ring-shaped or substantially ring-shaped energy director welded over an entire or substantially entire circumference between the opposing surfaces of the one member and the other member,
a pair of adjacent energy directors and a first step protrusion that protrudes a surface including the energy directors are provided on the surface of the one member that is to be the joint;
a step recess is provided on a surface of the other member that serves as the joint portion, the step recess being formed by recessing a surface facing the first step protrusion,
2. An ultrasonic bonding structure comprising: a first step projection that is continuous between the pair of energy directors and has a constricted shape between the pair of energy directors . 前記接合部は、前記エネルギーダイレクタの内側に臨む位置に、前記一方の部材と前記他方の部材との何れかを貫通した孔部を有することを特徴とする請求項６又は７に記載の超音波接合構造。 8. The ultrasonic bonding structure according to claim 6, wherein the bonding portion has a hole penetrating either the one member or the other member at a position facing an inside of the energy director. 前記孔部が前記一方の部材に設けられていることを特徴とする請求項８に記載の超音波接合構造。 9. The ultrasonic bonding structure according to claim 8 , wherein the hole is provided in the one of the members. 前記一方の部材の前記接合部となる面には、互いに隣り合う一対の前記エネルギーダイレクタが設けられ、
前記一対のエネルギーダイレクタの間で連続すると共に、前記一対のエネルギーダイレクタの間で括れた形状を有する前記第１の段差凸部が設けられていることを特徴とする請求項６、８、９の何れか一項に記載の超音波接合構造。 A pair of adjacent energy directors are provided on the surface of the one member that will be the joint,
10. The ultrasonic bonding structure according to claim 6, wherein the first stepped convex portion is continuous between the pair of energy directors and has a constricted shape between the pair of energy directors.
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