JP5127045B2 - Crimp structure of wire and terminal - Google Patents

Crimp structure of wire and terminal Download PDF

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JP5127045B2
JP5127045B2 JP2008019092A JP2008019092A JP5127045B2 JP 5127045 B2 JP5127045 B2 JP 5127045B2 JP 2008019092 A JP2008019092 A JP 2008019092A JP 2008019092 A JP2008019092 A JP 2008019092A JP 5127045 B2 JP5127045 B2 JP 5127045B2
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conductor
crimping
bottom plate
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electric wire
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慶 佐藤
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Yazaki Corp
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Description

本発明は、電線と端子との圧着構造に係り、前記電線としてアルミニウム製またはアルミニウム合金製の導体部を有するアルミニウム電線を用いると特に好適な圧着構造に関する。   The present invention relates to a crimping structure between an electric wire and a terminal, and more particularly to a crimping structure that is particularly suitable when an aluminum electric wire having a conductor portion made of aluminum or aluminum alloy is used as the electric wire.

自動車等の車両に配索されるワイヤハーネスには銅電線が一般に使用されている。そして、ワイヤハーネス同士、あるいはワイヤハーネスと車載機器との接続にあたり、ワイヤハーネスの銅電線には端子が取り付けられ、この種の端子は、一般に圧着によって銅電線に取り付けられている。   Copper wires are generally used for wire harnesses routed in vehicles such as automobiles. In connecting the wire harnesses or between the wire harness and the in-vehicle device, a terminal is attached to the copper wire of the wire harness, and this type of terminal is generally attached to the copper wire by crimping.

銅電線へ圧着される端子は、典型的には、銅製の複数の素線を撚り合わせてなる銅電線の導体部が載置される底板部と、底板部に載置された導体部を挟むために底板部に連設された一対の導体加締片と、を備えている。そして、一対の導体加締片は、内側に加締められることで、導体部を底板部との間に挟み込み、それにより端子が銅電線の導体部に圧着される。   The terminal to be crimped to the copper electric wire typically sandwiches the bottom plate portion on which the conductor portion of the copper electric wire formed by twisting a plurality of copper wires is placed, and the conductor portion placed on the bottom plate portion. For this purpose, a pair of conductor crimping pieces provided continuously to the bottom plate portion is provided. And a pair of conductor crimping pieces are crimped inside, and a conductor part is pinched | interposed between a baseplate part, and, thereby, a terminal is crimped | bonded to the conductor part of a copper electric wire.

ところで近年、銅資源の不足に加え、車両の軽量化やリサイクルの容易性を考慮して、アルミニウム電線が注目されている。しかしながら、アルミニウムは銅に比べて表面に形成される酸化皮膜が厚く、アルミニウム電線では、導体部と端子との間の接触抵抗が比較的高くなる傾向にある。この接触抵抗を低減することについて、端子の各導体加締片を導体部に強く加締め、導体部の圧縮率を高くする方法が知られている。これによれば、導体部を構成する各素線の酸化皮膜が破壊され、導体部と端子との間の接触抵抗が低減される。尚、本明細書において、導体部の圧縮率とは、圧着前の導体部の断面積に対する圧着後の導体部の断面積の比として規定される。   By the way, in recent years, aluminum wires have attracted attention in consideration of the shortage of copper resources and the weight reduction and ease of recycling of vehicles. However, aluminum has a thicker oxide film formed on the surface than copper, and in an aluminum electric wire, the contact resistance between the conductor portion and the terminal tends to be relatively high. In order to reduce this contact resistance, a method is known in which each conductor crimping piece of the terminal is strongly crimped to the conductor portion to increase the compressibility of the conductor portion. According to this, the oxide film of each strand which comprises a conductor part is destroyed, and the contact resistance between a conductor part and a terminal is reduced. In the present specification, the compression ratio of the conductor portion is defined as the ratio of the cross-sectional area of the conductor portion after crimping to the cross-sectional area of the conductor portion before crimping.

しかしながら、導体部の圧縮率を高くすることに伴い、導体部に作用する応力も高くなる。そして、アルミニウムは銅に比べて機械的強度に劣り、アルミニウム電線では、導体部に過度の応力が作用すると端子の圧着強度が著しく低下してしまう。そこで、アルミニウム電線と端子との圧着において、導体部と端子との接触抵抗の低減と、端子の圧着強度の確保と、を両立させることを目的としたアルミニウム電線と端子との圧着構造が種々提案されている(例えば、特許文献1、2参照)。   However, as the compressibility of the conductor portion is increased, the stress acting on the conductor portion is also increased. And aluminum is inferior in mechanical strength compared with copper, and in an aluminum electric wire, when an excessive stress acts on a conductor part, the crimping | compression-bonding strength of a terminal will fall remarkably. Therefore, various crimping structures between aluminum wires and terminals have been proposed for the purpose of achieving both the reduction of contact resistance between the conductor and the terminals and the securing of the crimping strength of the terminals in the crimping of the aluminum wires and terminals. (For example, see Patent Documents 1 and 2).

特許文献1に開示された圧着構造では、アルミニウム電線の導体部の断面積に応じて、導体部と端子との接触抵抗の低減と、端子の圧着強度の確保と、を両立し得る導体部の圧縮率を規定している。例えば、導体部の断面積が1.5mm未満のものについては、導体部の圧縮率は50〜70%とされ、導体部の断面積が1.5mm以上のものについては、導体部の圧縮率は40〜70%とされている。尚、銅電線への端子の圧着における導体部の圧着率は、典型的には75〜95%である。 In the crimping structure disclosed in Patent Document 1, according to the cross-sectional area of the conductor part of the aluminum electric wire, a reduction in contact resistance between the conductor part and the terminal and securing of the crimping strength of the terminal can be achieved. Specifies the compression ratio. For example, when the cross-sectional area of the conductor portion is less than 1.5 mm 2 , the compressibility of the conductor portion is 50 to 70%, and when the cross-sectional area of the conductor portion is 1.5 mm 2 or more, The compression rate is 40 to 70%. In addition, the crimping | compression-bonding rate of the conductor part in the crimping | compression-bonding of the terminal to a copper electric wire is typically 75 to 95%.

特許文献2に開示された圧着構造では、図4に示すように、アルミニウム電線201の導体部202に加締められる加締片(バレル)が二対設けられている。そして、圧着された状態で、導体部202の基端側に位置した保持用加締片203の加締め高さ(クランプハイト)Hbが、導体部202の先端側に位置した導通用加締片204の加締め高さHaよりも高くなるように、段差が設けられた圧着治具を用いて両加締片203,204を導体部202に加締めている。これにより、保持用加締片203による導体部202の圧縮率は銅電線への端子の圧着における導体部の圧縮率と同程度として圧着強度を確保し、導通用加締片204による導体部202の圧縮率は比較的高くして接触抵抗を低減するようにしている。
特開2005−174896号公報 特開2005−50736号公報
In the crimping structure disclosed in Patent Document 2, as shown in FIG. 4, two pairs of crimping pieces (barrels) that are crimped to the conductor portion 202 of the aluminum electric wire 201 are provided. And the crimping height (clamp height) Hb of the holding crimping piece 203 located on the proximal end side of the conductor part 202 in the crimped state is the conduction crimping piece located on the distal end side of the conductor part 202. Both crimping pieces 203 and 204 are crimped to the conductor portion 202 by using a crimping jig provided with a step so as to be higher than the crimping height Ha of 204. As a result, the compression rate of the conductor portion 202 by the holding crimping piece 203 is approximately the same as the compression rate of the conductor portion in crimping the terminal to the copper wire, and the crimping strength is ensured. The compression ratio is relatively high to reduce the contact resistance.
JP 2005-174896 A JP-A-2005-50736

上記特許文献1に開示された圧着構造では、導体部の圧縮率が銅電線の場合に比べて総じて高くなっており、端子の圧着強度の低下は避けられない。これに対して、上記特許文献2に開示された圧着構造では、保持用加締片203が加締められた部位と、導通用加締片204が加締められた部位とで、加締め高さHb、Haの違いにより、導体部202に対する圧縮率を変えることができ、保持用加締片203が加締められた部位の導体部202の圧縮率を銅電線の場合と同程度として、端子の圧着強度の低下を回避することができる。しかしながら、上記特許文献2に開示された圧着構造では、導通用加締片204と保持用加締片203との加締め高さを異ならせるように両加締片204、203を導体部202に加締めるために、専用の圧着治具が必要となり、また、導通用加締片204および保持用加締片203の2箇所の高さHa、Hbを管理する必要があり、コストがかかる。   In the crimping structure disclosed in Patent Document 1, the compressibility of the conductor portion is generally higher than that in the case of a copper wire, and a decrease in the crimping strength of the terminal is inevitable. On the other hand, in the crimping structure disclosed in the above-mentioned Patent Document 2, the crimping height between the portion where the holding crimping piece 203 is crimped and the portion where the conductive crimping piece 204 is crimped is shown. Depending on the difference between Hb and Ha, the compression ratio for the conductor portion 202 can be changed, and the compression ratio of the conductor portion 202 at the portion where the holding crimping piece 203 is crimped is set to the same level as in the case of the copper electric wire. A decrease in the pressure bonding strength can be avoided. However, in the crimping structure disclosed in Patent Document 2, both the crimping pieces 204 and 203 are attached to the conductor portion 202 so that the crimping heights of the conduction crimping piece 204 and the holding crimping piece 203 are different. In order to perform caulking, a dedicated crimping jig is required, and it is necessary to manage the heights Ha and Hb at two locations of the conductive caulking piece 204 and the holding caulking piece 203, which is costly.

本発明は、上述した事情に鑑みてなされたものであり、電線の導体部と端子との接触抵抗の低減(電気導通特性の向上)と、端子の圧着強度(端子保持力)の確保と、を容易に且つ確実に両立させることができる電線と端子との圧着構造を提供することを目的とする。   The present invention has been made in view of the above-described circumstances, reduction of contact resistance between the conductor portion of the electric wire and the terminal (improvement of electrical conduction characteristics), ensuring of the crimping strength of the terminal (terminal holding force), It is an object of the present invention to provide a crimping structure between an electric wire and a terminal that can easily and reliably achieve both.

前述した目的を達成するために、本発明に係る電線と端子との圧着構造は下記(1)〜()を特徴としている。
(1) 電線と端子との圧着構造であって、
前記端子は、前記電線の導体部が載置された底板部と、該底板部に連設され、且つ該底板部上の前記導体部を挟むように加締められた一対の導体加締片と、を備え、
前記一対の導体加締片の間に位置し、前記一対の導体加締片によって該一対の導体加締片と前記底板部との間に挟まれ且つ圧着された前記導体部の圧着部分の先端側に位置する凸部が、前記底板部の一部を下から上に打ち出すことにより前記底板部上に形成されており、
前記底板部から前記導体加締片までの加締め高さが該導体加締片のほぼ全幅にわたり略一定とされ、それにより、前記圧着部分において先端側の部分がそれよりも基端側の部分よりも強く前記凸部の所で前記導体加締片によって圧縮されていること。
(2) 電線と端子との圧着構造であって、
前記端子は、前記電線の導体部が載置された底板部と、該底板部に連設され、且つ該底板部上の前記導体部を挟むように加締められた一対の導体加締片と、を備え、
前記一対の導体加締片の間に位置し、前記一対の導体加締片によって該一対の導体加締片と前記底板部との間に挟まれ且つ圧着された前記導体部の圧着部分の先端側に位置する凸部が、前記導体加締片の基端側の一部に逆U字状の切り込みを入れて、該切り込みの内側切片を前記底板部に向けて折り曲げることにより前記底板部上に形成されており、
前記底板部から前記導体加締片までの加締め高さが該導体加締片のほぼ全幅にわたり略一定とされ、それにより、前記圧着部分において先端側の部分がそれよりも基端側の部分よりも強く前記凸部の所で前記導体加締片によって圧縮されていること
(3) 上記(1)または(2)の構成の電線と端子との圧着構造において、
前記底板部の上面にセレーションが設けられ、当該セレーションは、前記凸部があるために強く前記導体加締片によって圧縮される前記圧着部分の先端側の部分よりも基端側に僅かにずれた部分に圧着すること。
(4) 上記(1)〜(3)のいずれかの構成の電線と端子との圧着構造において、
前記電線が、前記導体部としてアルミニウム製またはアルミニウム合金製の導体部を有するアルミニウム電線であること。
In order to achieve the above-described object, the crimping structure between the electric wire and the terminal according to the present invention is characterized by the following (1) to ( 4 ).
(1) A crimping structure between an electric wire and a terminal,
The terminal includes a bottom plate portion on which the conductor portion of the electric wire is placed, and a pair of conductor crimping pieces that are connected to the bottom plate portion and crimped so as to sandwich the conductor portion on the bottom plate portion. With
The tip of the crimped portion of the conductor portion positioned between the pair of conductor crimping pieces and sandwiched between the pair of conductor crimping pieces and the bottom plate portion by the pair of conductor crimping pieces. A convex portion located on the side is formed on the bottom plate portion by punching out a part of the bottom plate portion from below ,
The caulking height from the bottom plate portion to the conductor caulking piece is substantially constant over almost the entire width of the conductor caulking piece, so that the tip side portion of the crimping portion is a portion closer to the base end side. It is more strongly compressed by the conductor crimping piece at the convex portion.
(2) A crimping structure between an electric wire and a terminal,
The terminal includes a bottom plate portion on which the conductor portion of the electric wire is placed, and a pair of conductor crimping pieces that are connected to the bottom plate portion and crimped so as to sandwich the conductor portion on the bottom plate portion. With
The tip of the crimped portion of the conductor portion positioned between the pair of conductor crimping pieces and sandwiched between the pair of conductor crimping pieces and the bottom plate portion by the pair of conductor crimping pieces. A convex portion located on the side is formed with an inverted U-shaped cut in a part of the base end side of the conductor crimping piece, and an inner section of the cut is bent toward the bottom plate portion to Is formed,
The caulking height from the bottom plate portion to the conductor caulking piece is substantially constant over almost the entire width of the conductor caulking piece, so that the tip side portion of the crimping portion is a portion closer to the base end side. It is more strongly compressed by the conductor crimping piece at the convex portion .
(3) In the crimping structure between the electric wire and the terminal configured as described in (1) or (2) above,
Serrations are provided on the upper surface of the bottom plate portion, and the serrations are slightly shifted to the proximal end side than the distal end side portions of the crimping portions that are strongly compressed by the conductor crimping pieces due to the convex portions. Crimp to the part .
(4) In the crimping structure between the electric wire and the terminal in any one of the constitutions (1) to (3) ,
The electric wire is an aluminum electric wire having a conductor part made of aluminum or aluminum alloy as the conductor part.

上記(1)の構成の圧着構造によれば、導体加締片の全体の加締め高さを略一定に管理しながら、前側の凸部のある位置において導体部に対する圧縮率を高く設定でき、凸部のない後側の位置において導体部に対する圧縮率を低く設定できる。従って、前側の圧縮率の高い部分で電気的導通性能を高く維持し、後側の圧縮率の低い部分で端子保持力を高く維持することができる。つまり、従来のように導体加締片の加締め高さを2段に管理する必要がないため、工程管理が容易になる上、専用の圧着治具も必要でなくなり、コストを抑制することができる。また、凸部が底板部の打ち出しにより形成されているので、コストをかけずに簡単に凸部を端子に追加することができる。
上記(2)の構成の圧着構造によれば、導体加締片の全体の加締め高さを略一定に管理しながら、前側の凸部のある位置において導体部に対する圧縮率を高く設定でき、凸部のない後側の位置において導体部に対する圧縮率を低く設定できる。従って、前側の圧縮率の高い部分で電気的導通性能を高く維持し、後側の圧縮率の低い部分で端子保持力を高く維持することができる。つまり、従来のように導体加締片の加締め高さを2段に管理する必要がないため、工程管理が容易になる上、専用の圧着治具も必要でなくなり、コストを抑制することができる。また、導体加締片の基端部に切り込みを入れて曲げるだけで凸部を形成することができるので、簡単な工程の付加だけで凸部を端子に追加することができる。
上記(3)の構成の圧着構造によれば、凸部のない導体部の基端側の位置での圧縮率は低くなるものの、その位置にはセレーションが設けられているので、セレーションに導体部が食い込むことにより、導体部の長手方向への引張強度が高まる。
上記(4)の構成の圧着構造によれば、アルミニウム電線の導体部と端子との接触抵抗の低減と、端子の圧着強度の確保と、を容易に且つ確実に両立させることができる。
According to the crimping structure of the configuration of (1) above, while maintaining the overall crimping height of the conductor crimping piece substantially constant, the compression ratio for the conductor part can be set high at a position where the front convex portion is located, The compression rate with respect to the conductor portion can be set low at the rear position without the convex portion. Therefore, it is possible to maintain high electrical continuity performance at a portion with a high compression ratio on the front side, and to maintain a high terminal holding force at a portion with a low compression ratio on the rear side. In other words, since there is no need to manage the crimping height of the conductor crimping pieces in two steps as in the prior art, the process management becomes easy and a dedicated crimping jig is not necessary, thereby reducing costs. it can. Moreover, since the convex portion is formed by punching out the bottom plate portion, the convex portion can be easily added to the terminal without cost.
According to the crimping structure of the configuration of (2) above, while maintaining the overall crimping height of the conductor crimping piece to be substantially constant, the compression rate for the conductor part can be set high at a position where the front convex portion is located, The compression rate with respect to the conductor portion can be set low at the rear position without the convex portion. Therefore, it is possible to maintain high electrical continuity performance at a portion with a high compression ratio on the front side, and to maintain a high terminal holding force at a portion with a low compression ratio on the rear side. In other words, since there is no need to manage the crimping height of the conductor crimping pieces in two steps as in the prior art, the process management becomes easy and a dedicated crimping jig is not necessary, thereby reducing costs. it can. Further, since the convex portion can be formed simply by cutting and bending the base end portion of the conductor crimping piece, the convex portion can be added to the terminal only by adding a simple process.
According to the crimping structure having the configuration of (3) above, although the compression rate at the position on the proximal end side of the conductor portion without the convex portion is low, the serration is provided at that position. As a result, the tensile strength in the longitudinal direction of the conductor portion increases.
According to the crimping structure having the configuration (4), it is possible to easily and reliably achieve both reduction in contact resistance between the conductor portion of the aluminum electric wire and the terminal and securing of the crimping strength of the terminal.

本発明に係る電線と端子との圧着構造によれば、電線の導体部と端子との接触抵抗の低減と、端子の圧着強度の確保と、を容易に且つ確実に両立させることができる。   According to the crimping structure between the electric wire and the terminal according to the present invention, it is possible to easily and reliably achieve both the reduction of the contact resistance between the conductor portion of the electric wire and the terminal and the securing of the crimping strength of the terminal.

以下、本発明の電線と端子との圧着構造の好適な実施形態を図面に基づいて詳細に説明する。   Hereinafter, a preferred embodiment of a crimping structure between an electric wire and a terminal of the present invention will be described in detail based on the drawings.

(第1実施形態)
図1(a)および(b)は本発明に係る電線と端子との圧着構造の第1実施形態を示す図であって、図1(a)はアルミニウム電線および端子の分解斜視図、そして図1(b)は図1(a)のIb−Ib矢視断面を示す斜視図である。図2(a)は本発明に係るアルミニウム電線と端子との圧着構造におけるアルミニウム電線の導体部を圧着した端子の部分の縦断面図、図2(b)は図2(a)のIIb−IIb矢視断面図、そして図2(c)は図2(a)のIIc−IIc矢視断面図である。尚、図中の矢印Aは端子の先端(前端)方向、そして矢印Bは端子の基端(後端)方向を示している。
(First embodiment)
FIGS. 1A and 1B are views showing a first embodiment of a crimping structure of an electric wire and a terminal according to the present invention. FIG. 1A is an exploded perspective view of an aluminum electric wire and a terminal, and FIG. 1 (b) is a perspective view showing a cross section taken along the arrow Ib-Ib in FIG. 1 (a). FIG. 2A is a longitudinal sectional view of a portion of a terminal obtained by crimping a conductor portion of an aluminum wire in a crimp structure of an aluminum wire and a terminal according to the present invention, and FIG. 2B is IIb-IIb in FIG. FIG. 2C is a cross-sectional view taken along the arrow, and FIG. 2C is a cross-sectional view taken along the IIc-IIc arrow in FIG. In the figure, an arrow A indicates the tip (front end) direction of the terminal, and an arrow B indicates the base end (rear end) direction of the terminal.

図1(a)に示すように、アルミニウム電線1は、アルミニウム製またはアルミニウム合金製の複数の素線3が撚り合わされた導体部2を有し、この導体部2の外周が絶縁材料で形成されたシース4で被覆されている被覆電線である。アルミニウム電線1は、その端末部(即ち、先端部分)において、所定の長さでシース4が除去されて導体部2が露出しており、端子10は、この端末部に圧着される。尚、アルミニウム合金の好ましい具体例としては、アルミニウムと鉄との合金を挙げることができる。この合金を採用した場合、アルミニウム製の導体に比べて、延び易く、強度(特に引張強度)を増すことができる。   As shown to Fig.1 (a), the aluminum electric wire 1 has the conductor part 2 by which the strand 3 made from aluminum or an aluminum alloy was twisted together, and the outer periphery of this conductor part 2 is formed with an insulating material. The covered electric wire is covered with a sheath 4. The aluminum wire 1 has a sheath 4 removed at a predetermined length at the terminal portion (that is, the tip portion) to expose the conductor portion 2, and the terminal 10 is crimped to the terminal portion. A preferred specific example of the aluminum alloy is an alloy of aluminum and iron. When this alloy is employed, it is easier to extend and the strength (particularly tensile strength) can be increased as compared with an aluminum conductor.

図1(a)および(b)に示すように、端子10は、銅合金等の導電性金属製の板材をプレス成形(折り曲げ成形を含む。)することにより形成されたものであって、その先端部に相手方端子(図示せず)との接続部11が設けられ、その基端部にアルミニウム電線1を保持する保持部12が設けられている。更に保持部12は、その先端側にアルミニウム電線1の導体部2の露出した先端部分を保持する導体保持部13が設けられ、その基端側にアルミニウム電線1のシース4を保持するシース保持部14が設けられている。   As shown in FIGS. 1A and 1B, the terminal 10 is formed by press-molding (including bending) a plate material made of a conductive metal such as a copper alloy. A connecting portion 11 with a counterpart terminal (not shown) is provided at the distal end portion, and a holding portion 12 that holds the aluminum electric wire 1 is provided at the proximal end portion. Further, the holding portion 12 is provided with a conductor holding portion 13 that holds the exposed tip portion of the conductor portion 2 of the aluminum electric wire 1 on the distal end side, and a sheath holding portion that holds the sheath 4 of the aluminum electric wire 1 on the proximal end side. 14 is provided.

導体保持部13は、アルミニウム電線1の端末部に露出した導体部2が載置される底板部20と、底板部20に載置された導体部2を挟むために導体部20に連設された一対の導体加締片21と、を備えており、端子10の長手方向に対して直交する断面において略U字状に成形されている。   The conductor holding portion 13 is connected to the conductor portion 20 so as to sandwich the bottom plate portion 20 on which the conductor portion 2 exposed at the terminal portion of the aluminum electric wire 1 is placed and the conductor portion 2 placed on the bottom plate portion 20. And a pair of conductor crimping pieces 21, which are formed in a substantially U shape in a cross section orthogonal to the longitudinal direction of the terminal 10.

シース保持部14は、アルミニウム電線1の端末部のシース4が載置される底板部22と、底板部22に載置されたシース4を挟むために底板部22に連設された一対のシース加締片23と、を備えており、導体保持部13と同様に断面略U字状に成形されている。尚、シース保持部14の底板部22は、導体保持部13の底板部20の基端に連設されている。   The sheath holding portion 14 includes a bottom plate portion 22 on which the sheath 4 of the terminal portion of the aluminum electric wire 1 is placed, and a pair of sheaths connected to the bottom plate portion 22 so as to sandwich the sheath 4 placed on the bottom plate portion 22. And a caulking piece 23, which is formed in a substantially U-shaped cross section like the conductor holding portion 13. The bottom plate portion 22 of the sheath holding portion 14 is connected to the base end of the bottom plate portion 20 of the conductor holding portion 13.

更に図2(a)〜(c)も参照して、導体保持部13の底板部20上には、一対の導体加締片21の間に位置し且つ一対の導体加締片21によって該一対の導体加締片21と底板部20との間に挟まれ且つ圧着された導体部2の圧着部分の先端側(前側)に位置する1つの凸部24が設けられている。この凸部24は、底板部20を形成している板材を打ち出すことにより形成されている。   2A to 2C, the pair of conductor crimping pieces 21 are located on the bottom plate portion 20 of the conductor holding portion 13 between the pair of conductor crimping pieces 21. A convex portion 24 is provided between the conductor crimping piece 21 and the bottom plate portion 20 and located on the tip side (front side) of the crimped portion of the conductor portion 2 that is crimped. The convex portion 24 is formed by punching a plate material forming the bottom plate portion 20.

また、導体保持部13の底板部20上の凸部24より後側の位置には、導体部2の圧着部分の軸線方向(即ち、端子10の長手方向)と直交する方向に互いに平行に延びる複数本のセレーション(浅い溝)25が設けられ、凸部24はセレーション25が設けられた箇所の前側に位置している。   In addition, the conductor holding part 13 extends in parallel to each other in a direction orthogonal to the axial direction of the crimped part of the conductor part 2 (that is, the longitudinal direction of the terminal 10) at a position behind the convex part 24 on the bottom plate part 20 of the conductor holding part 13. A plurality of serrations (shallow grooves) 25 are provided, and the convex portion 24 is located on the front side of the place where the serrations 25 are provided.

端子10は、導体保持部13の一対の導体加締片21を、この導体保持部13の底板部20に載置されたアルミニウム電線1の導体部2に加締め付けられ、また、シース保持部14の一対のシース加締片23を、このシース保持部14の底板部22に載置されたアルミニウム電線1のシース4に加締め付けられて、電線1に圧着されている。   In the terminal 10, the pair of conductor crimping pieces 21 of the conductor holding part 13 are crimped to the conductor part 2 of the aluminum electric wire 1 placed on the bottom plate part 20 of the conductor holding part 13, and the sheath holding part 14 The pair of sheath crimping pieces 23 are crimped to the sheath 4 of the aluminum electric wire 1 placed on the bottom plate portion 22 of the sheath holding portion 14 and are crimped to the electric wire 1.

この場合、導体保持部13の底板部20から導体加締片21までの加締め高さHが、図4に示した従来のものと違って、導体加締片21のほぼ全幅にわたって略一定とされている。従ってそれにより、図2(a)〜(c)に示すように、導体部2の圧着部分において先端側の部分{図2(b)参照}がそれよりも基端側の部分{図2(c)参照}よりも強く導体保持部13の凸部24の所で導体加締片21によって圧縮されている。即ち、導体保持部13の内部において、導体部2は、凸部24のある位置で高さHaに圧縮され、凸部24のない位置で高さHb(但しHa<Hb)に圧縮されている。   In this case, the caulking height H from the bottom plate portion 20 of the conductor holding portion 13 to the conductor caulking piece 21 is substantially constant over almost the entire width of the conductor caulking piece 21 unlike the conventional one shown in FIG. Has been. Accordingly, as shown in FIGS. 2 (a) to 2 (c), in the crimped portion of the conductor portion 2, the distal end portion {refer to FIG. 2 (b)} becomes the proximal end portion {FIG. c) is compressed by the conductor crimping piece 21 at the convex portion 24 of the conductor holding portion 13 more strongly than the reference}. That is, inside the conductor holding portion 13, the conductor portion 2 is compressed to a height Ha at a position where the convex portion 24 is present, and is compressed to a height Hb (where Ha <Hb) where the convex portion 24 is not present. .

本実施形態のアルミニウム電線1と端子10との圧着構造によれば、導体加締片21の全体の加締め高さHを略一定に管理しながら、前側の凸部24のある位置においては導体部2に対する圧縮率を高く設定でき、凸部24のない後側の位置においては、導体部2に対する圧縮率を低く設定できる。従って、凸部24のある位置での導体部2の圧縮率を銅電線の場合と同程度として導体加締片21の加締めを行なえば、前側の圧縮率の高い部分で電気的導通性能を高く維持することができると同時に、後側の圧縮率の低い部分で過大な力をかけずに端子保持力を高く確保することができる。つまり、従来のように導体加締片の加締め高さを2段に管理する必要がないため、工程管理が容易になる上、専用の圧着治具も必要でなくなり、コストを抑制することができる。   According to the crimping structure between the aluminum electric wire 1 and the terminal 10 of the present embodiment, the conductor caulking height 21 of the conductor caulking piece 21 is controlled to be substantially constant, and the conductor is provided at a position where the front convex portion 24 is located. The compression rate with respect to the portion 2 can be set high, and the compression rate with respect to the conductor portion 2 can be set low at the rear position without the convex portion 24. Therefore, if the conductor crimping piece 21 is caulked with the same compressibility of the conductor 2 at the position where the convex portion 24 is located as in the case of the copper wire, the electrical conduction performance can be improved in the front portion having a high compressibility. At the same time, it is possible to maintain a high terminal holding force without applying an excessive force at a portion having a low compression rate on the rear side. In other words, since there is no need to manage the crimping height of the conductor crimping pieces in two steps as in the prior art, the process management becomes easy and a dedicated crimping jig is not necessary, thereby reducing costs. it can.

また、凸部24のない導体部2の基端側の位置での圧縮率は低くなるものの、その位置にはセレーション25が設けられているので、セレーション25に導体部2が食い込むことにより、導体部2の長手方向への引張強度を高く維持することができる。   In addition, although the compression rate at the position on the base end side of the conductor part 2 without the convex part 24 is low, the serration 25 is provided at that position. The tensile strength in the longitudinal direction of the portion 2 can be kept high.

また、本実施形態では、圧縮率を高めるための凸部24を、底板部20を構成する板金の打ち出しにより形成しているので、コストをかけずに簡単に凸部24を端子10に追加することができる。   Moreover, in this embodiment, since the convex part 24 for raising a compressibility is formed by stamping out the sheet metal which comprises the baseplate part 20, the convex part 24 is simply added to the terminal 10 without incurring cost. be able to.

(第2実施形態)
図3(a)および(b)は本発明に係る電線と端子との圧着構造の第2実施形態を示す図であって、図3(a)はアルミニウム電線および端子の分解斜視図、そして図3(b)は図3(a)の端子がアルミニウム電線に圧着されている状態でのIIIb−IIIb矢視断面図である。尚、第1実施形態のアルミニウム電線と端子との圧着構造と機能的に共通する部材については、図中同一符号を付することにより、説明を省略あるいは簡略する。
(Second Embodiment)
3A and 3B are views showing a second embodiment of the crimping structure of the electric wire and the terminal according to the present invention, and FIG. 3A is an exploded perspective view of the aluminum electric wire and the terminal, and FIG. 3 (b) is a cross-sectional view taken along the arrow IIIb-IIIb in a state where the terminal of FIG. 3 (a) is crimped to the aluminum electric wire. In addition, about the member functionally common with the crimping | compression-bonding structure of the aluminum electric wire and terminal of 1st Embodiment, description is abbreviate | omitted or simplified by attaching | subjecting the same code | symbol in a figure.

図3(a)および(b)に示すように、本実施形態の圧着構造では、アルミニウム電線1の端末部に端子10Bが圧着されている。この端子10Bは、その先端部に相手方端子との接続部11が設けられ、その基端部にアルミニウム電線1を保持する保持部12が設けられている。更に保持部12は、その先端側にアルミニウム電線1の導体部2を保持する導体保持部13が設けられ、その基端側にアルミニウム電線1のシースを保持するシース保持部14が設けられている。ここまでの構成は、上述した第1実施形態の圧着構造の端子10と同様である。   As shown in FIGS. 3A and 3B, in the crimping structure of the present embodiment, the terminal 10 </ b> B is crimped to the terminal portion of the aluminum electric wire 1. The terminal 10B is provided with a connecting portion 11 with a counterpart terminal at a distal end portion thereof, and a holding portion 12 that holds the aluminum electric wire 1 at a proximal end portion thereof. Furthermore, the holding part 12 is provided with a conductor holding part 13 that holds the conductor part 2 of the aluminum electric wire 1 on the distal end side, and a sheath holding part 14 that holds the sheath of the aluminum electric wire 1 on the base end side. . The configuration up to here is the same as the terminal 10 of the crimping structure of the first embodiment described above.

異なる点としては、導体保持部13の底板部20に設けられた凸部35の形成の仕方である。即ち、この端子10Bにおいては、凸部35が、一対の導体加締片21の基端側の一部に逆U字状の切り込み36を入れて、切り込みの内側切片37を底板部20の上面に向けて折り曲げることにより形成されていることである。具体的には、一対の内側切片37は、基端37aで底板部20の幅方向の中心に向けて折り曲げられ、互いに突き当たる箇所37bで底板部20の上面に向けて略直角に折り曲げられ、先端37cが底板部20の上面に突き当てられており、これら折り曲げられた2つの内側切片37によって凸部35が構成されている。   The difference is in the manner of forming the convex portion 35 provided on the bottom plate portion 20 of the conductor holding portion 13. That is, in this terminal 10 </ b> B, the convex portion 35 has an inverted U-shaped cut 36 formed in a part of the base end side of the pair of conductor crimping pieces 21, and the cut inner piece 37 is placed on the upper surface of the bottom plate portion 20. That is, it is formed by bending toward the side. Specifically, the pair of inner sections 37 are bent toward the center in the width direction of the bottom plate portion 20 at the base end 37a, and are bent at substantially right angles toward the upper surface of the bottom plate portion 20 at the portions 37b that abut each other. 37 c is abutted against the upper surface of the bottom plate portion 20, and the convex portion 35 is constituted by these two bent inner sections 37.

この凸部35は、第1実施形態の圧着構造と同様に、セレーション25の前側に配置されており、加締められた導体加締片21によって導体加締片21と底板部20との間に挟まれた導体部2の圧着部分の先端側(前側)に位置している。そして、端子10Bは、一対の導体加締片21を加締めることによって導体部2に圧着されており、その場合の底板部20から導体加締片21までの加締め高さH(図2参照)が、導体加締片21のほぼ全幅にわたり略一定にされていることにより、凸部35のある位置においては、図3(b)に示すように導体部2の圧着部分における先端側の部分が、それよりも基端側の部分よりも強く導体加締片21によって圧縮されている。従って、第1実施形態の圧着構造と同様の効果を奏することができる。また、本実施形態では、凸部35を、導体加締片21の基端部に逆U字状の切り込み36を入れて内側切片37を曲げるだけで形成しているので、簡単な工程の付加だけで、凸部35を有した端子10Bを作ることができる。   Similar to the crimping structure of the first embodiment, the convex portion 35 is disposed on the front side of the serration 25, and is clamped between the conductor crimping piece 21 and the bottom plate portion 20 by the crimped conductor crimping piece 21. It is located on the tip side (front side) of the crimped portion of the sandwiched conductor portion 2. And the terminal 10B is crimped | bonded to the conductor part 2 by crimping a pair of conductor crimping piece 21, and the crimping height H from the bottom-plate part 20 to the conductor crimping piece 21 in that case (refer FIG. 2) ) Is made substantially constant over almost the entire width of the conductor crimping piece 21, so that at the position where the convex portion 35 is located, the tip side portion of the crimped portion of the conductor portion 2 as shown in FIG. However, it is compressed by the conductor crimping piece 21 more strongly than the proximal end portion. Therefore, the same effect as the crimping structure of the first embodiment can be obtained. Further, in the present embodiment, the convex portion 35 is formed simply by inserting an inverted U-shaped cut 36 at the base end portion of the conductor crimping piece 21 and bending the inner section 37, so that a simple process can be added. Only the terminal 10B having the convex portion 35 can be made.

尚、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の形状、寸法、数値、形態、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the shape, size, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

本発明に係る電線と端子との圧着構造の第1実施形態を示す図であって、図1(a)はアルミニウム電線および端子の分解斜視図、そして図1(b)は図1(a)のIb−Ib矢視断面を示す斜視図である。It is a figure which shows 1st Embodiment of the crimping | compression-bonding structure of the electric wire and terminal which concerns on this invention, Comprising: Fig.1 (a) is an exploded perspective view of an aluminum electric wire and a terminal, FIG.1 (b) is FIG.1 (a). It is a perspective view which shows the Ib-Ib arrow cross section of. 図2(a)は本発明に係るアルミニウム電線と端子との圧着構造におけるアルミニウム電線の導体部を圧着した端子の部分の縦断面図、図2(b)は図2(a)のIIb−IIb矢視断面図、そして図2(c)は図2(a)のIIc−IIc矢視断面図である。FIG. 2A is a longitudinal sectional view of a portion of a terminal obtained by crimping a conductor portion of an aluminum wire in a crimp structure of an aluminum wire and a terminal according to the present invention, and FIG. 2B is IIb-IIb in FIG. FIG. 2C is a cross-sectional view taken along the arrow, and FIG. 2C is a cross-sectional view taken along the IIc-IIc arrow in FIG. 本発明に係る電線と端子との圧着構造の第2実施形態を示す図であって、図3(a)はアルミニウム電線および端子の分解斜視図、そして図3(b)は図3(a)の端子がアルミニウム電線に圧着されている状態でのIIIb−IIIb矢視断面図である。It is a figure which shows 2nd Embodiment of the crimping | compression-bonding structure of the electric wire and terminal which concerns on this invention, Comprising: Fig.3 (a) is an exploded perspective view of an aluminum electric wire and a terminal, FIG.3 (b) is FIG.3 (a). It is a IIIb-IIIb arrow directional cross-sectional view in the state by which the terminal of this is crimped | bonded to the aluminum electric wire. 図4(a)は従来のアルミニウム電線と端子との圧着構造を示す平面図、そして図4(b)は図4(a)に示す圧着構造の側面図である。FIG. 4A is a plan view showing a conventional crimping structure between an aluminum electric wire and a terminal, and FIG. 4B is a side view of the crimping structure shown in FIG.

符号の説明Explanation of symbols

1:アルミニウム電線
2:導体部
10,10B:端子
20:底板部
21:導体加締片
24,35:凸部
25:セレーション
1: Aluminum wire 2: Conductor portions 10 and 10B: Terminal 20: Bottom plate portion 21: Conductor crimping pieces 24, 35: Convex portion 25: Serration

Claims (4)

電線と端子との圧着構造であって、
前記端子は、前記電線の導体部が載置された底板部と、該底板部に連設され、且つ該底板部上の前記導体部を挟むように加締められた一対の導体加締片と、を備え、
前記一対の導体加締片の間に位置し、前記一対の導体加締片によって該一対の導体加締片と前記底板部との間に挟まれ且つ圧着された前記導体部の圧着部分の先端側に位置する凸部が、前記底板部の一部を下から上に打ち出すことにより前記底板部上に形成されており、
前記底板部から前記導体加締片までの加締め高さが該導体加締片のほぼ全幅にわたり略一定とされ、それにより、前記圧着部分において先端側の部分がそれよりも基端側の部分よりも強く前記凸部の所で前記導体加締片によって圧縮されていることを特徴とする電線と端子との圧着構造。
A crimping structure between an electric wire and a terminal,
The terminal includes a bottom plate portion on which the conductor portion of the electric wire is placed, and a pair of conductor crimping pieces that are connected to the bottom plate portion and crimped so as to sandwich the conductor portion on the bottom plate portion. With
The tip of the crimped portion of the conductor portion positioned between the pair of conductor crimping pieces and sandwiched between the pair of conductor crimping pieces and the bottom plate portion by the pair of conductor crimping pieces. A convex portion located on the side is formed on the bottom plate portion by punching out a part of the bottom plate portion from below ,
The caulking height from the bottom plate portion to the conductor caulking piece is substantially constant over almost the entire width of the conductor caulking piece, so that the tip side portion of the crimping portion is a portion closer to the base end side. A crimping structure between an electric wire and a terminal, which is more strongly compressed by the conductor crimping piece at the convex portion.
電線と端子との圧着構造であって、
前記端子は、前記電線の導体部が載置された底板部と、該底板部に連設され、且つ該底板部上の前記導体部を挟むように加締められた一対の導体加締片と、を備え、
前記一対の導体加締片の間に位置し、前記一対の導体加締片によって該一対の導体加締片と前記底板部との間に挟まれ且つ圧着された前記導体部の圧着部分の先端側に位置する凸部が、前記導体加締片の基端側の一部に逆U字状の切り込みを入れて、該切り込みの内側切片を前記底板部に向けて折り曲げることにより前記底板部上に形成されており、
前記底板部から前記導体加締片までの加締め高さが該導体加締片のほぼ全幅にわたり略一定とされ、それにより、前記圧着部分において先端側の部分がそれよりも基端側の部分よりも強く前記凸部の所で前記導体加締片によって圧縮されていることを特徴とする電線と端子との圧着構造。
A crimping structure between an electric wire and a terminal,
The terminal includes a bottom plate portion on which the conductor portion of the electric wire is placed, and a pair of conductor crimping pieces that are connected to the bottom plate portion and crimped so as to sandwich the conductor portion on the bottom plate portion. With
The tip of the crimped portion of the conductor portion positioned between the pair of conductor crimping pieces and sandwiched between the pair of conductor crimping pieces and the bottom plate portion by the pair of conductor crimping pieces. A convex portion located on the side is formed with an inverted U-shaped cut in a part of the base end side of the conductor crimping piece, and an inner section of the cut is bent toward the bottom plate portion to Is formed,
The caulking height from the bottom plate portion to the conductor caulking piece is substantially constant over almost the entire width of the conductor caulking piece, so that the tip side portion of the crimping portion is a portion closer to the base end side. A crimping structure between an electric wire and a terminal, which is more strongly compressed by the conductor crimping piece at the convex portion .
前記底板部の上面にセレーションが設けられ、当該セレーションは、前記凸部があるために強く前記導体加締片によって圧縮される前記圧着部分の先端側の部分よりも基端側に僅かにずれた部分に圧着することを特徴とする請求項1または請求項2に記載した電線と端子との圧着構造。 Serrations are provided on the upper surface of the bottom plate portion, and the serrations are slightly shifted to the proximal end side than the distal end side portions of the crimping portions that are strongly compressed by the conductor crimping pieces due to the convex portions. crimping structure of the wire and the terminal according to claim 1 or claim 2, characterized in that crimping the portion. 前記電線が、前記導体部としてアルミニウム製またはアルミニウム合金製の導体部を有するアルミニウム電線であることを特徴とする請求項1〜請求項3のいずれか一項に記載した電線と端子との圧着構造。 The said electric wire is an aluminum electric wire which has a conductor part made from aluminum or an aluminum alloy as said conductor part , The crimping | compression-bonding structure of the electric wire and terminal as described in any one of Claims 1-3 characterized by the above-mentioned. .
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