JP2005254481A - Connection method and connected body - Google Patents

Connection method and connected body Download PDF

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Publication number
JP2005254481A
JP2005254481A JP2004065348A JP2004065348A JP2005254481A JP 2005254481 A JP2005254481 A JP 2005254481A JP 2004065348 A JP2004065348 A JP 2004065348A JP 2004065348 A JP2004065348 A JP 2004065348A JP 2005254481 A JP2005254481 A JP 2005254481A
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Japan
Prior art keywords
convex portion
convex
heat ray
concave
concave portion
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JP2004065348A
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Japanese (ja)
Inventor
Toshio Watanabe
敏雄 渡辺
Takehiko Nakajima
毅彦 中島
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2004065348A priority Critical patent/JP2005254481A/en
Publication of JP2005254481A publication Critical patent/JP2005254481A/en
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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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • B29C65/606—Riveting or staking the rivets being integral with one of the parts to be joined, i.e. staking
    • B29C65/608—Riveting or staking the rivets being integral with one of the parts to be joined, i.e. staking the integral rivets being pushed in blind holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B29C65/1441—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C65/1487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of light guides
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
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    • B29C65/1629—Laser beams characterised by the way of heating the interface
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/1641—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • B29C65/169—Laser beams making use of light guides being a part of the joined article
    • 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
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    • B29C66/124—Tongue and groove joints
    • B29C66/1242—Tongue and groove joints comprising interlocking undercuts
    • B29C66/12421—Teardrop-like, waterdrop-like or mushroom-like interlocking undercuts
    • 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
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    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1242—Tongue and groove joints comprising interlocking undercuts
    • B29C66/12423—Dovetailed interlocking undercuts
    • 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
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    • B29C66/124—Tongue and groove joints
    • B29C66/1242—Tongue and groove joints comprising interlocking undercuts
    • B29C66/12425—Other specific interlocking undercuts not provided for in B29C66/12421 - B29C66/12423
    • 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
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    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12443—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue substantially in the middle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/24223—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 oval
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection method which prevents the exposure of a connection part to a surface when two members are connected inseparably by the plastic deformation of a thermoplastic member. <P>SOLUTION: A first member 2 having a projection 2c which absorbs laser beams and is plasticized is made to face a second member 3 having a recess 3c which transmits laser beams and corresponds to the projection 2c. The projection 2c is inserted into the recess 3c, irradiated with laser beams L through the second member, and pressed by the bottom surface 3e of the recess 3c. By expanding the plasticized projection sideward, a head part 2d is formed. A space for engagement which engages with the head part 2d to receive and wrap it is formed in advance in the recess 3c. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、一方の部材を塑性変形させることによって、二つの部材を分離不能に連結する技術に関する。   The present invention relates to a technique for connecting two members inseparably by plastically deforming one member.

熱可塑性樹脂の特性を利用して二つの部材を連結する方法が知られている。たとえば、特許文献１には、一方の連結部材の熱可塑性樹脂からなる凸部を連結相手部材の貫通穴に嵌め込み、その貫通穴から突出した凸部に熱光線を照射して加熱軟化させるとともに成形型を押付けて成形する（かしめ加工する）ことによって二つの部材を機械的に連結する技術が開示されている。さらに、特許文献２〜４にも、熱可塑性樹脂に工具等を押し付けて塑性変形させることによって二つの部材を連結する技術が開示されている。   A method of connecting two members using the characteristics of a thermoplastic resin is known. For example, in Patent Document 1, a convex portion made of a thermoplastic resin of one coupling member is fitted into a through hole of a coupling partner member, and the convex portion protruding from the through hole is irradiated with heat rays to be softened by heating and molded. A technique is disclosed in which two members are mechanically connected by pressing and molding (caulking) a mold. Furthermore, Patent Documents 2 to 4 also disclose techniques for connecting two members by pressing a tool or the like against a thermoplastic resin to cause plastic deformation.

また、二つの樹脂部材を溶着する技術が特許文献５、６に開示されている。これらは、レーザー光に対して透過性のある樹脂部材とレーザー光に対して吸収性のある樹脂部材を重ね合わせたうえで、透過性のある樹脂部材側からレーザー光を照射することによって樹脂面同士を溶着させる。
特開平６−７１７５９号公報 特開２０００−３０９０５６号公報 特開２００３−１１２３２号公報 特公昭６２−３００９０号公報 特開２００３−２５１６９９号公報 特開２００３−３２０５８５号公報 Patent Documents 5 and 6 disclose techniques for welding two resin members. The resin surface is obtained by irradiating a laser beam from the transparent resin member side after superposing a resin member transparent to the laser beam and a resin member absorbing the laser beam. Weld each other.
JP-A-6-71759 JP 2000-309056 A JP 2003-11232 A Japanese Patent Publication No.62-30090 JP 2003-251699 A JP 2003-320585 A

特許文献１〜４に開示された技術では、連結部において熱可塑性樹脂が連結相手部材を貫通した部分に工具等を押付けることによって、貫通した熱可塑性樹脂を物理的に変形させる。従って、この技術では熱可塑性樹脂の変形部（頭部またはかしめ部）が表面に露出するのが避けられないし、連結部表面を平坦に仕上げることも難しい。
他方、特許文献５と６に開示された溶着技術によれば、溶着部が露出することがなく、連結部表面を平坦に仕上げることが可能である。しかしながら、連結する二つの部材は、互いに溶着しあう材質に限定されてしまうので適用範囲が狭いという問題がある。 In the techniques disclosed in Patent Literatures 1 to 4, the thermoplastic resin that has penetrated is physically deformed by pressing a tool or the like against a portion where the thermoplastic resin has penetrated the coupling partner member in the coupling portion. Therefore, in this technique, it is inevitable that the deformed portion (head or caulking portion) of the thermoplastic resin is exposed on the surface, and it is difficult to finish the surface of the connecting portion flat.
On the other hand, according to the welding technique disclosed in Patent Documents 5 and 6, the welded portion is not exposed and the surface of the connecting portion can be finished flat. However, since the two members to be connected are limited to materials that are welded to each other, there is a problem that the application range is narrow.

本発明は上記事情に鑑みてなされたものであり、熱可塑性部材を塑性変形させることによって二つの部材を分離不能に連結するに際し、連結部を表面に露出させない連結方法と連結体を提供することを解決すべき課題とするものである。   The present invention has been made in view of the above circumstances, and provides a connecting method and a connecting body that do not expose the connecting portion to the surface when two members are connected inseparably by plastically deforming a thermoplastic member. Is a problem to be solved.

請求項１に記載の発明は、熱光線吸収性と熱可塑性を持つ凸部を有する第１部材と、熱光線透過性を持つとともに前記凸部に対応する間口形状で連結面に開口する凹部を有している第２部材を連結する方法に関する。この連結方法では、第１部材と第２部材を近接させて凸部を凹部に嵌め込み、第２部材越しに熱光線を凸部に向けて照射し、凹部の内面で凸部を押圧する。ここで言う熱光線とは熱エネルギーをもっている光をいう。例えばレーザー光、赤外線等である。   The invention according to claim 1 is provided with a first member having a convex portion having heat ray absorption and thermoplasticity, and a concave portion having heat ray permeability and having a front opening shape corresponding to the convex portion and opening in the connection surface. It is related with the method of connecting the 2nd member which has. In this connection method, the first member and the second member are brought close to each other, the convex portion is fitted into the concave portion, the heat beam is irradiated toward the convex portion through the second member, and the convex portion is pressed by the inner surface of the concave portion. The heat ray referred to here means light having heat energy. For example, laser light or infrared light.

この連結方法によると、第１部材の凸部が熱光線を吸収することで局部的に発熱する。その際、熱光線透過性のある第２部材越しに、すなわち第２部材を透過させて熱光線を照射するために、第２部材に貫通孔を設ける必要がない。従って、凸部が第２部材の表面に露出することが防がれる。凸部が局部的に加熱した状態で、凹部の内面で凸部が押圧される。これにより、凸部は塑性変形して凹部内面との接触面積を増すので凹部から外れ難くなる。
凹部の内面で凸部を押圧するには、第１部材と第２部材間に予め設けておいた隙間が狭くなるように接近させればよい。したがって、凸部に押し当てる成形型が不要で加工設備が簡素になる。この押圧力は、塑性を有する凸部を変形させるためのものであるから低加圧荷重で済み、残留応力を小さくすることができる。
凹凸部は、互いに溶着する材質であってもよいし、溶着しない異種材質であっても構わない。 According to this connection method, the convex part of the first member generates heat locally by absorbing heat rays. At this time, it is not necessary to provide a through hole in the second member in order to irradiate the heat beam through the second member having heat ray permeability, that is, through the second member. Therefore, the convex portion is prevented from being exposed on the surface of the second member. With the convex portion heated locally, the convex portion is pressed on the inner surface of the concave portion. Accordingly, the convex portion is plastically deformed to increase the contact area with the inner surface of the concave portion, so that it is difficult to come off from the concave portion.
In order to press the convex portion with the inner surface of the concave portion, it is only necessary to approach the gap so that a gap provided in advance between the first member and the second member is narrowed. Therefore, a molding die that presses against the convex portion is unnecessary, and the processing equipment is simplified. Since this pressing force is for deforming the convex portion having plasticity, a low pressure load is sufficient, and the residual stress can be reduced.
The concavo-convex portion may be a material that is welded to each other, or may be a different material that is not welded.

凹部には、凹部の底面で押圧された凸部が側方へ膨出するのを受け入れる係合用空間が形成されていることが好ましい。   It is preferable that an engagement space is formed in the concave portion to receive the convex portion pressed on the bottom surface of the concave portion bulging sideways.

凹部に係合用空間が形成されていると、凸部は係合用空間に侵入するように塑性変形する。その後、常温に戻った凸部は、係合用空間に侵入した頭部によって第２部材と係合する。これにより、第１部材と第２部材を機械的に分離不能に接合することができる。すなわち、連結する両部材を溶着させなくても強固に連結することができ、例えば無機ガラスと樹脂といった異種材料を高い信頼性で連結することが可能になる。   When the engaging space is formed in the concave portion, the convex portion is plastically deformed so as to enter the engaging space. Then, the convex part which returned to normal temperature engages with the 2nd member with the head which penetrate | invaded the space for engagement. Thereby, the 1st member and the 2nd member can be joined mechanically inseparably. That is, the two members to be connected can be firmly connected without welding, and different materials such as inorganic glass and resin can be connected with high reliability.

第２部材によって、外部から照射された熱光線が凸部に到達する光路が形成されるようにすることもできる。   The second member can form an optical path through which heat rays irradiated from the outside reach the convex portion.

この方式を採用すると、外部から第２部材に照射された熱光線が、第２部材内で反射屈折を繰り返して第１部材の凸部に達することになる。熱光線源と凸部を直線で結ぶ同軸上の位置関係に設定しなくてもよいので、設計の自由度が増し、適用範囲が広くなる。
この方式を採用すると、複数の凸部が分散配置されていたり、あるいは凸部が帯状に形成されている場合に、熱光線を１箇所に照射するだけで、全凸部に熱光線を照射することが可能となる。さらに、凸部を同時期に可塑化させることができるために、可塑化タイミングが場所によって異なることから生じる仕上がり品の歪みを解消できる。
凹部を略球状の空洞部を有する形状とし、湾曲する凹面によって熱光線を屈折させて第１部材の凸部に収束させる構成にするのが好適である。この場合、湾曲する凹面にて熱光線を屈折させて凸部に収束させることによって、より効果的に加熱することができる。 When this method is adopted, the heat beam applied to the second member from the outside repeats the reflection and refraction in the second member and reaches the convex portion of the first member. Since it is not necessary to set the positional relationship on the same axis connecting the heat ray source and the convex portion with a straight line, the degree of freedom of design increases and the application range becomes wide.
When this method is adopted, when a plurality of convex portions are dispersedly arranged or the convex portions are formed in a strip shape, the heat rays are irradiated to all the convex portions only by irradiating one portion with the heat rays. It becomes possible. Furthermore, since the convex portions can be plasticized at the same time, it is possible to eliminate the distortion of the finished product caused by the plasticization timing being different depending on the location.
It is preferable that the concave portion has a shape having a substantially spherical cavity, and the heat ray is refracted by the curved concave surface so as to converge on the convex portion of the first member. In this case, the heat can be more effectively heated by refracting the heat ray on the curved concave surface and converging it on the convex portion.

第２部材の凹部と熱光線照射部以外の表面を反射材で被覆しておき、その熱光線照射部に熱光線を照射することで、凸部に熱光線を照射することも可能である。   It is also possible to irradiate the convex portion with heat rays by covering the surface of the second member other than the concave portion and the heat ray irradiating portion with a reflecting material and irradiating the heat ray irradiating portion with the heat ray.

この方式によると、光路が反射材で覆われているので、光路内を進行する熱光線が外部へ漏れることが防がれ、凸部に対する加熱効率が高められる。   According to this method, since the optical path is covered with the reflecting material, heat rays traveling in the optical path are prevented from leaking to the outside, and the heating efficiency for the convex portions is increased.

この発明は、従来にない連結体を実現した。この連結体は、熱光線吸収性と熱可塑性を持つ凸部を有する第１部材と、熱光線透過性を持つとともに前記凸部に対応する凹部を有する第２部材が、互いの凹凸部を嵌合させてなる連結体であり、凸部は第１部材の基部から立ち上がる頸部の先端にその頸部より幅広の頭部を有している。凹部には凸部の頸部に対応する間口形状の開口部と凸部の頭部を包み込む係合部が設けられている。   This invention has realized an unprecedented connector. In this connection body, a first member having a convex portion having heat ray absorbability and thermoplasticity and a second member having a concave portion corresponding to the convex portion are fitted with each other's concave and convex portions. The convex part has a head wider than the neck at the tip of the neck rising from the base of the first member. The concave portion is provided with an opening having a frontal shape corresponding to the neck portion of the convex portion and an engaging portion that wraps the head portion of the convex portion.

この発明に係わる連結体は、凹部の係合部が凸部の頭部を包み込むようにしているので分離不能であり、かつ、連結部の露出が防がれる。無機ガラスと樹脂といった互いに溶着できない異種材料の連結体を容易に形成できる。   In the connection body according to the present invention, since the engaging portion of the concave portion wraps the head portion of the convex portion, it cannot be separated, and the exposure of the connecting portion is prevented. It is possible to easily form a connection body of different materials such as inorganic glass and resin that cannot be welded to each other.

本発明によれば、熱可塑性部材を塑性変形させることによって二つの部材を分離不能に連結するに際し、連結部を表面に露出させないので、表面を平坦な状態に仕上げることができ、外観品質を保つのが容易になるという効果がある。なお、この効果は、二つの部材が互いに溶着する・しないに関わらず得られる。   According to the present invention, when the two members are connected inseparably by plastically deforming the thermoplastic member, the connecting portion is not exposed to the surface, so that the surface can be finished in a flat state and the appearance quality is maintained. There is an effect that it becomes easy. This effect can be obtained regardless of whether or not the two members are welded to each other.

以下、本発明の実施例を図面に基づいて説明する。最初に、以下に説明する実施例の主要な特徴を列記する。
（形態１） 凹部には、凸部に対応する間口形状で連結面に開口する開口部と、凹部内で凸部が押圧されて側方へ膨出するのを許容する空間が形成されており、凹部の背面側は閉じている。
（形態２） 凸部は、凹部の底面で押圧されることで先端部が塑性変形し、変形しない基端部（頸部）より幅広の頭部を形成する。
（形態３） 凸部の頭部が凹部の係合部によって包み込まれた状態となって第１部材と第２部材が分離不能に連結している。 Embodiments of the present invention will be described below with reference to the drawings. First, the main features of the embodiments described below are listed.
(Embodiment 1) The recess is formed with an opening that opens to the connecting surface in the shape of a front opening corresponding to the protrusion, and a space that allows the protrusion to be pressed and bulge to the side in the recess. The back side of the recess is closed.
(Form 2) A convex part forms a head wider than the base end part (neck part) which does not deform | transform, when a front-end | tip part plastically deforms by being pressed on the bottom face of a recessed part.
(Mode 3) The first member and the second member are inseparably connected to each other in a state where the head portion of the convex portion is encased by the engaging portion of the concave portion.

（実施例１） 図１および図２に示す製品１は容器のようなものであり、本体である第１部材２と、蓋である第２部材３とが連結された連結体となっている。連結前の要部形状が図３（イ）に示されている。同図に示すように、第１部材２の基部２ａから立ち上がる周壁部２ｂの上端に横断面矩形で帯状の凸部（突条）２ｃがリング状に形成されている。他方、第２部材３の基部３ａは平坦な上面を有しており、基部３ａの下面側に形成された周壁部３ｂの下端部には下面（連結面）に開口し凸部２ｃを挿入可能な凹部３ｃが設けられている。この凹部３ｃは凸部２ｃに対応する間口の開口部３ｄを有しており、開口部３ｄから奥は間口寸法より幅広（凸部２ｃより大径）に形成されており、底面３ｅによって背面側が閉じられている。すなわち、図３（ロ）に示すように、凹部３ｃに凸部２ｃが挿入されたときに、凸部２ｃの基端部によって開口部３ｄがちょうど塞がれ、かつ、凸部２ｃの先端部の周りには所定の空間３ｆが存在するようになっている。この空間３ｆを形成する部位、すなわち開口縁部３ｇと底面３ｅと凹部３ｃの内周部が本発明でいう係合部を構成する。
凹部３ｃの深さは、凸部２ｃの長さより若干浅く設定されている。凸部２ｃの先端が底面３ｅに当接したときに、周壁部２ｂと周壁部３ｂは未だ当接しておらず所定寸法の隙間Ｃが確保される。 (Example 1) The product 1 shown in FIG. 1 and FIG. 2 is like a container, and is a connection body in which a first member 2 that is a main body and a second member 3 that is a lid are connected. . The main part shape before connection is shown in FIG. As shown in the figure, a band-shaped convex portion (projection) 2 c having a rectangular cross section is formed in a ring shape at the upper end of the peripheral wall portion 2 b rising from the base portion 2 a of the first member 2. On the other hand, the base portion 3a of the second member 3 has a flat upper surface, and the lower end portion of the peripheral wall portion 3b formed on the lower surface side of the base portion 3a can be opened on the lower surface (connection surface) and the convex portion 2c can be inserted. A concave portion 3c is provided. The concave portion 3c has a front opening 3d corresponding to the convex portion 2c, and the back from the opening 3d is formed wider than the front size (larger diameter than the convex portion 2c). Closed. That is, as shown in FIG. 3B, when the convex portion 2c is inserted into the concave portion 3c, the opening 3d is just blocked by the base end portion of the convex portion 2c, and the tip end portion of the convex portion 2c. There is a predetermined space 3f around. The part forming this space 3f, that is, the opening edge portion 3g, the bottom surface 3e, and the inner peripheral portion of the recess 3c constitute the engaging portion referred to in the present invention.
The depth of the concave portion 3c is set slightly shallower than the length of the convex portion 2c. When the tip of the convex portion 2c comes into contact with the bottom surface 3e, the peripheral wall portion 2b and the peripheral wall portion 3b are not yet in contact with each other, and a gap C having a predetermined dimension is secured.

第１部材２は熱可塑性樹脂に適宜な着色材（カーボッブラックなど）を添加したもので形成され、レーザー光等の熱光線を表面で吸収して発熱する。これに対し第２部材３はレーザー光を十分透過する材質であり、たとえば第１部材２と溶着可能な透明な樹脂で形成されている。レーザー光は、８００〜１１００ｎｍの近赤外波長とする。   The first member 2 is formed by adding an appropriate colorant (such as carbon black) to a thermoplastic resin, and generates heat by absorbing heat rays such as laser light on the surface. On the other hand, the second member 3 is a material that sufficiently transmits laser light, and is formed of, for example, a transparent resin that can be welded to the first member 2. The laser light has a near infrared wavelength of 800 to 1100 nm.

次に、上記構成の第１部材２と第２部材３とを連結する方法について説明する。まず、第１部材２と第２部材３を押圧装置（図示省略）にセットして凸部２ｃと凹部３ｃを対向させる（図３（イ））。次に、第１部材２と第２部材３を接近させ、凸部２ｃを凹部３ｃに嵌め込む。凸部２ｃの先端が底面３ｅに当接したときに、周壁部２ｂと周壁部３ｂは未だ当接しておらず所定寸法の隙間Ｃができている（図３（ロ））。この状態で、レーザー装置を用いて第２部材３の上方から凸部２ｃに向けてレーザー光Ｌを照射するとともに、第２部材３に対して第１部材２を押圧力Ｐで押しつける。これにより、凸部２ｃはレーザー光Ｌを吸収して発熱し可塑化する。このとき、底面３ｅが凸部２ｃの頂部を押圧しており、可塑化した凸部２ｃはアンコ状に押しつぶされて側方に膨出して空間３ｆに進入する（図３（ハ））。即ち、開口縁部３ｇに挟まれた凸部２ｃの基端部（頸部）は変形せず、先端部が塑性変形して頸部より幅広の頭部２ｄを形成する。その後、レーザー光Ｌの照射を止め、溶着部が硬化するまで隙間Ｃの無い状態を保持する。   Next, a method for connecting the first member 2 and the second member 3 configured as described above will be described. First, the first member 2 and the second member 3 are set in a pressing device (not shown), and the convex portion 2c and the concave portion 3c are opposed to each other (FIG. 3 (A)). Next, the 1st member 2 and the 2nd member 3 are made to approach, and convex part 2c is inserted in concave part 3c. When the tip of the convex portion 2c comes into contact with the bottom surface 3e, the peripheral wall portion 2b and the peripheral wall portion 3b are not yet in contact with each other, and a gap C having a predetermined dimension is formed (FIG. 3B). In this state, the laser beam L is irradiated from above the second member 3 toward the convex portion 2 c using the laser device, and the first member 2 is pressed against the second member 3 with the pressing force P. Thereby, the convex part 2c absorbs the laser beam L, generates heat, and is plasticized. At this time, the bottom surface 3e presses the top of the convex portion 2c, and the plasticized convex portion 2c is crushed in an antral shape and bulges laterally to enter the space 3f (FIG. 3 (C)). That is, the base end portion (neck portion) of the convex portion 2c sandwiched between the opening edge portions 3g is not deformed, and the distal end portion is plastically deformed to form a head portion 2d wider than the neck portion. Thereafter, irradiation with the laser beam L is stopped, and the state without the gap C is maintained until the welded portion is cured.

上記連結方法では、凸部２ｃの先端部に頭部２ｄができることにより接触面積が増し、溶着し易くなる。この頭部２ｄは凹部内面に覆われているので露出が防がれるとともに、係合部にていわば包み込まれた状態になっているので全方向の移動が拘束される。したがって、図４に示すように、凸部２ｃの頭部２ｄが凹部３ｃの底面３ｅに溶着しなかった場合でも、この頭部２ｄが開口縁部３ｇと係合して凸部２ｃが脱落することを防ぐことができる。この明細書でいう連結とは、２部材が分離不能に維持されることをいい、図４に示すように、所定範囲内では相対移動する態様を包含する。
製品１の第１部材２と第２部材３は、連結部（連結要素）を表面に露出させること無く機械的に連結されており分離不能となっている。 In the above connection method, the head 2d is formed at the tip of the convex portion 2c, so that the contact area is increased and welding is facilitated. Since the head 2d is covered with the inner surface of the concave portion, exposure is prevented, and movement in all directions is restricted because the head is surrounded by the engaging portion. Therefore, as shown in FIG. 4, even when the head portion 2d of the convex portion 2c is not welded to the bottom surface 3e of the concave portion 3c, the head portion 2d engages with the opening edge portion 3g and the convex portion 2c falls off. Can be prevented. The connection in this specification means that the two members are kept inseparable, and includes a mode in which they are relatively moved within a predetermined range as shown in FIG.
The first member 2 and the second member 3 of the product 1 are mechanically connected without exposing the connecting portion (connecting element) to the surface, and cannot be separated.

なお、凹部３ｃは、図５に例示するような適宜形状の凹部１１、凹部１２、凹部１３等に変更し得る。全体として傾斜する凹部１３等を利用しても、第１部材２と第２部材３を係合させて機械的に連結することができる。凹部の奥側に係合用空間を設けておく必要は必ずしもない。凹部には微小な凹凸を付加しておくこともできる。
また凸部２ｃは、レーザー光を吸収する材料で表面がコーティングされていてもよい。 In addition, the recessed part 3c can be changed into the recessed part 11, the recessed part 12, the recessed part 13, etc. of an appropriate shape which are illustrated in FIG. The first member 2 and the second member 3 can be engaged and mechanically connected even when the concave portion 13 or the like inclined as a whole is used. It is not always necessary to provide an engagement space on the back side of the recess. A minute unevenness can be added to the recess.
Moreover, the surface of the convex part 2c may be coated with a material that absorbs laser light.

（実施例２） 次に、連結方法の別例について説明する。図６および図７に示すように、第２部材１３の凹部１３ｃは略球状に形成され、湾曲する凹面１３ｄによってレーザー光を屈折させて凹部内で収束させるようになっている。この第２部材１３は、レーザー光の光路を形成するものであり、照射されたレーザー光Ｌが、光路１４内で反射を繰り返して凹部１３ｃに到達するようになっている。第２部材１３には、レーザー光の透過率が高い材料（９０％以上のもの）を用いる。その他の構成は、実施例１と同様である。 (Example 2) Next, another example of the connection method will be described. As shown in FIGS. 6 and 7, the concave portion 13c of the second member 13 is formed in a substantially spherical shape, and the laser beam is refracted and converged in the concave portion by the curved concave surface 13d. The second member 13 forms an optical path of laser light, and the irradiated laser light L is repeatedly reflected in the optical path 14 and reaches the recess 13c. For the second member 13, a material having a high laser beam transmittance (90% or more) is used. Other configurations are the same as those of the first embodiment.

なお、第２部材１３の光路を反射部材で覆ってレーザー光の漏洩を防ぐのが好ましい。図８に示す別例の第２部材１５は、第２部材１３の入射部１４ａと凹部１３ｃを除く表面を反射材１６で覆ったものである。反射材１６にはアルミニウム蒸着膜を用いることができる。   In addition, it is preferable to cover the optical path of the second member 13 with a reflecting member to prevent leakage of laser light. In another example of the second member 15 shown in FIG. 8, the surface of the second member 13 excluding the incident portion 14 a and the concave portion 13 c is covered with a reflective material 16. An aluminum vapor deposition film can be used for the reflector 16.

上記の例では、第２部材１３の上面側に設けた入射部１４ａから照射されたレーザー光が、第２部材１３内で反射を繰り返して凹部１３ｃに伝わり、さらに湾曲する凹面１３ｄで屈折することによって凸部１２ｃ上で収束する。これにより、凸部１２ｃがより効果的に加熱されて可塑化する。この構成によれば、レーザー光源と凸部を直線で結ぶ同軸上の位置関係に設定しなくてもよいので、設計の自由度が増す。   In the above example, the laser light emitted from the incident portion 14a provided on the upper surface side of the second member 13 is repeatedly reflected in the second member 13 and transmitted to the concave portion 13c, and further refracted by the curved concave surface 13d. To converge on the convex portion 12c. Thereby, the convex part 12c is more effectively heated and plasticized. According to this configuration, since it is not necessary to set the positional relationship on the same axis connecting the laser light source and the convex portion with a straight line, the degree of freedom in design increases.

以上、本発明の実施形態について詳細に説明したが、これらは例示に過ぎず、特許請求の範囲を限定するものではない。特許請求の範囲に記載の技術には、以上に例示した具体例を様々に変形、変更したものが含まれる。
たとえば、突条と凹部に変えて、複数の棒状突起とこれに対応する凹部を分散配置することにしてもよい。この場合、突起の先端をリベットの頭状に塑性変形させる。
また、本明細書または図面に説明した技術要素は、単独であるいは各種の組合せによって技術的有用性を発揮するものであり、出願時の請求項に記載の組合せに限定されるものではない。また、本明細書または図面に例示した技術は複数の目的を同時に達成するものであり、そのうちの一つの目的を達成すること自体で技術的有用性を持つものである。 As mentioned above, although embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
For example, instead of the ridges and the recesses, a plurality of rod-like protrusions and corresponding recesses may be dispersedly arranged. In this case, the tip of the protrusion is plastically deformed into a rivet head shape.
In addition, the technical elements described in the present specification or drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology exemplified in this specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

実施例１の連結品を示す平面図である。FIG. 3 is a plan view showing a connected product of Example 1. 連結品の正面断面図である。It is front sectional drawing of a connection article. 実施例１の連結品の連結方法を説明する要部断面図である。It is principal part sectional drawing explaining the connection method of the connection goods of Example 1. FIG. 実施例１の連結品の連結機構を説明する要部断面図である。It is principal part sectional drawing explaining the connection mechanism of the connection goods of Example 1. FIG. 凹部形状の別例を説明する断面図である。It is sectional drawing explaining another example of a recessed part shape. 実施例２の連結方法を説明する断面図である。6 is a cross-sectional view illustrating a connection method of Example 2. FIG. 図６の要部拡大図である。It is a principal part enlarged view of FIG. 第２部材の別例を説明する断面図である。It is sectional drawing explaining another example of a 2nd member.

符号の説明Explanation of symbols

１・・連結品
２・・第１部材
２ｃ・凸部
３・・第２部材
３ｃ・凹部
３ｅ・底面 1..Connected product 2..First member 2c.Convex portion 3..Second member 3c.Concavity 3e.

Claims (5)

二つの部材を連結する方法であって、第１部材は熱光線吸収性と熱可塑性を持つ凸部を有する一方、第２部材は熱光線透過性を持つとともに前記凸部に対応する間口形状で連結面に開口する凹部を有しており、第１部材と第２部材を近接させて前記凸部を前記凹部に嵌め込み、第２部材越しに熱光線を前記凸部に向けて照射し、前記凹部の内面で前記凸部を押圧することを特徴とする連結方法。   A method of connecting two members, wherein the first member has a convex portion having heat ray absorptivity and thermoplasticity, while the second member has heat ray transmittance and a frontage shape corresponding to the convex portion. Having a recess opening in the connecting surface, bringing the first member and the second member close to each other, fitting the convex portion into the concave portion, irradiating the light beam toward the convex portion through the second member, A connecting method, wherein the convex portion is pressed by an inner surface of the concave portion. 前記凹部には、前記凹部の底面で押圧された前記凸部が側方へ膨出するのを受け入れる係合用空間が形成されていることを特徴とする請求項１記載の連結方法。   The connection method according to claim 1, wherein an engagement space is formed in the concave portion to receive the convex portion pressed on the bottom surface of the concave portion bulging sideways. 第２部材によって、外部から照射された熱光線が前記凸部に到達する光路が形成されることを特徴とする請求項１または２記載の連結方法。   The connection method according to claim 1, wherein the second member forms an optical path through which heat rays irradiated from the outside reach the convex portion. 第２部材の前記凹部と熱光線照射部以外の表面を反射材で被覆しておき、その熱光線照射部に熱光線を照射することを特徴とする請求項１または２記載の連結方法。   The connection method according to claim 1 or 2, wherein a surface of the second member other than the concave portion and the heat ray irradiation part is coated with a reflecting material, and the heat ray irradiation part is irradiated with the heat ray. 熱光線吸収性と熱可塑性を持つ凸部を有する第１部材と、熱光線透過性を持つとともに前記凸部に対応する凹部を有する第２部材が、互いの凹凸部を嵌合させてなる連結体であって、
前記凸部は第１部材の基部から立ち上がる頸部の先端に該頸部より幅広の頭部を有し、前記凹部には前記頸部に対応する間口形状の開口部と前記頭部を包み込む係合部が設けられていることを特徴とする連結体。 The 1st member which has the convex part which has heat ray absorptivity and thermoplasticity, and the 2nd member which has the concave part corresponding to the said convex part while having heat ray permeability are connected by mutually fitting an uneven part. Body,
The convex part has a head wider than the neck at the tip of the neck rising from the base of the first member, and the concave part envelops the head with a frontal opening corresponding to the neck. A connector having a joint portion.
JP2004065348A 2004-03-09 2004-03-09 Connection method and connected body Pending JP2005254481A (en)

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