JP6902414B2 - Exterior body for electric wires and wire harness with exterior body - Google Patents

Exterior body for electric wires and wire harness with exterior body Download PDF

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JP6902414B2
JP6902414B2 JP2017129294A JP2017129294A JP6902414B2 JP 6902414 B2 JP6902414 B2 JP 6902414B2 JP 2017129294 A JP2017129294 A JP 2017129294A JP 2017129294 A JP2017129294 A JP 2017129294A JP 6902414 B2 JP6902414 B2 JP 6902414B2
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wall portion
lid wall
exterior body
electric wire
inner lid
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JP2019013107A (en
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英行 池田
英行 池田
好一 亀井
好一 亀井
秀司 横関
秀司 横関
直之 児島
直之 児島
高村 聡
聡 高村
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THE FURUKAW ELECTRIC CO., LTD.
Furukawa Automotive Systems Inc
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THE FURUKAW ELECTRIC CO., LTD.
Furukawa Automotive Systems Inc
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Description

本発明は、電線の外周に装着される電線用外装体及び外装体付きワイヤーハーネスに関する。 The present invention relates to an outer body for an electric wire mounted on the outer periphery of the electric wire and a wire harness with the outer body.

車両等に配索される電線の外周に装着される電線用外装体として、複数の板状部材の間に中空構造が形成された中空板材でワイヤーハーネスの外周を覆うことにより、外力からワイヤーハーネスを保護するプロテクタが知られている(特許文献1)。特許文献1では、前記中空板材の中空構造として、山部と谷部からなる凹凸部が波状に連続する形状を有する板状部材である介在部材が用いられている。 As an exterior body for an electric wire to be attached to the outer circumference of an electric wire distributed to a vehicle or the like, the outer circumference of the wire harness is covered with a hollow plate material in which a hollow structure is formed between a plurality of plate-shaped members, so that the wire harness is subjected to external force. A protector is known (Patent Document 1). In Patent Document 1, as the hollow structure of the hollow plate material, an intervening member which is a plate-like member having a shape in which uneven portions composed of peaks and valleys are continuous in a wavy shape is used.

特許文献1の前記介在部材の中空構造を有する中空板材では、プロテクタに機械的強度を付与するために、一対の側壁部の他方の先端部から蓋部と重ね合せ可能なように延出する延出片を形成し、この延出片を蓋部と溶着等により接合することが必要な場合がある。 In the hollow plate material having the hollow structure of the intervening member of Patent Document 1, in order to impart mechanical strength to the protector, an extension extending from the other tip portion of the pair of side wall portions so as to be overlapped with the lid portion. It may be necessary to form a piece and join the piece to the lid by welding or the like.

しかし、前記介在部材の中空構造を有する中空板材は、機械的特性に異方性がある。また、前記介在部材の中空構造を有する中空板材を用いたプロテクタでは、蓋部及び延出片に対して鉛直方向の機械的強度に劣る。 However, the hollow plate material having the hollow structure of the intervening member has anisotropy in mechanical properties. Further, the protector using the hollow plate material having the hollow structure of the intervening member is inferior in mechanical strength in the vertical direction with respect to the lid portion and the extension piece.

従って、溶着等によって延出片と蓋部とを接合するにあたり、延出片と蓋部が上記鉛直方向からの力を受けると、延出片が蓋部から離れてしまい、十分な接合信頼性が得られないという問題や、プロテクタが押し潰されてしまうという問題がある。また、プロテクタが押し潰されてしまうことで、プロテクタに収容されている電線が破損してしまうという問題がある。 Therefore, when joining the extension piece and the lid portion by welding or the like, if the extension piece and the lid portion receive a force from the vertical direction, the extension piece is separated from the lid portion, and sufficient joining reliability is obtained. There is a problem that the protector cannot be obtained and the protector is crushed. Further, there is a problem that the electric wire housed in the protector is damaged because the protector is crushed.

また、延出片や蓋部に係止片を設け、該係止片を側壁部に設けられた係止孔に嵌めることで、延出片と蓋部に機械的強度を付与してプロテクタが押し潰されてしまうことを防止しようとしても、上記の通り、特許文献1の中空板材には、機械的特性に異方性があるので、プロテクタが押し潰されるのを確実に防止することは難しいという問題がある。 Further, by providing a locking piece on the extension piece or the lid portion and fitting the locking piece into the locking hole provided on the side wall portion, mechanical strength is given to the extension piece and the lid portion to provide a protector. Even if an attempt is made to prevent the protector from being crushed, as described above, since the hollow plate material of Patent Document 1 has anisotropy in mechanical properties, it is difficult to reliably prevent the protector from being crushed. There is a problem.

国際公開第2015/016056号International Publication No. 2015/016056

本発明は、上記事情に鑑みてなされたものであり、優れた機械的強度を有し、接合部の接合信頼性に優れた電線用外装体を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an outer body for an electric wire having excellent mechanical strength and excellent joining reliability of a joint portion.

本発明の態様は、熱可塑性樹脂発泡シートが折り曲げられて形成された、電線の外周に装着される電線用外装体であって、前記電線の延び方向に沿って延在し、前記電線を収容する収容部を形成する複数の壁部を備え、前記複数の壁部が、外側蓋壁部と、該外側蓋壁部と重なり合って接合された内側蓋壁部と、前記内側蓋壁部の両端と隣接する側壁部と、を有し、前記内側蓋壁部が、両端の前記側壁部に支持される支持部を有する電線用外装体である。 An aspect of the present invention is an electric wire exterior body formed by bending a thermoplastic resin foam sheet and attached to the outer periphery of the electric wire, which extends along the extending direction of the electric wire and accommodates the electric wire. A plurality of wall portions forming an accommodating portion are provided, and the plurality of wall portions are joined to the outer lid wall portion by overlapping with the outer lid wall portion, and both ends of the inner lid wall portion. An electric wire exterior body having a side wall portion adjacent to the main wall portion, and the inner lid wall portion having a support portion supported by the side wall portions at both ends.

本発明の態様は、前記内側蓋壁部が前記外側蓋壁部と重なり合った部位のうち、少なくとも一部が、押し込み強度5N以上、好ましくは10N以上、さらに好ましくは20N以上を有する電線用外装体である。 In the aspect of the present invention, at least a part of the portion where the inner lid wall portion overlaps with the outer lid wall portion has a pushing strength of 5 N or more, preferably 10 N or more, and more preferably 20 N or more. Is.

本明細書中、「押し込み強度」とは、相互に接触して重なり合っている接合前の外側蓋壁部と内側蓋壁部に対して、鉛直方向から力を付与した際に、内側蓋壁部が外側蓋壁部と接触した状態から少なくとも一部が非接触状態へ変化した時の力の大きさまたは内側蓋壁部若しくは外側蓋壁部が座屈したときの力の大きさを意味する。 In the present specification, the "pushing strength" refers to the inner lid wall portion when a force is applied from the vertical direction to the outer lid wall portion and the inner lid wall portion before joining which are in contact with each other and overlap each other. Means the magnitude of the force when at least a part of the contact with the outer lid wall changes to the non-contact state, or the magnitude of the force when the inner lid wall or the outer lid wall buckles.

本発明の態様は、前記内側蓋壁部と前記外側蓋壁部との接合手段が、接着、溶着及び/または嵌合手段である電線用外装体である。 In an aspect of the present invention, the means for joining the inner lid wall portion and the outer lid wall portion is an outer body for an electric wire which is an adhesive, welding and / or fitting means.

本発明の態様は、前記接合手段が溶着であり、溶着部の引張破壊強度が70N以上である電線用外装体である。 An aspect of the present invention is an electric wire exterior body in which the joining means is welded and the tensile fracture strength of the welded portion is 70 N or more.

本発明の態様は、前記支持部が係止部を備え、該係止部が一方の前記側壁部に設けられた被係止部に係止されて、前記内側蓋壁部が両端の前記側壁部に支持されている電線用外装体である。 In an aspect of the present invention, the support portion is provided with a locking portion, the locking portion is locked to a locked portion provided on one of the side wall portions, and the inner lid wall portion is the side wall at both ends. It is an exterior body for electric wires supported by the part.

本発明の態様は、前記内側蓋壁部が、前記係止部から前記電線の延び方向に対し直交方向に延在した部位にて、前記外側蓋壁部と接合されている電線用外装体である。 An aspect of the present invention is an electric wire exterior body in which the inner lid wall portion is joined to the outer lid wall portion at a portion extending in a direction orthogonal to the extending direction of the electric wire from the locking portion. is there.

本発明の態様は、前記支持部が支持体を備え、該支持体が一方の前記側壁部に沿って延在して、前記内側蓋壁部が両端の前記側壁部に支持されている電線用外装体である。 An aspect of the present invention is for an electric wire in which the support portion includes a support, the support portion extends along one of the side wall portions, and the inner lid wall portion is supported by the side wall portions at both ends. It is an exterior body.

本発明の態様は、前記熱可塑性樹脂発泡シートが、引張強さ3MPa以上10MPa以下であり、前記熱可塑性樹脂発泡シート面上における第1の基準直線方向の引張強さに対する、該第1の基準直線に対し直交する第2の基準直線方向の引張強さの割合が、50%以上200%以下である電線用外装体である。 In the aspect of the present invention, the thermoplastic resin foamed sheet has a tensile strength of 3 MPa or more and 10 MPa or less, and the first reference to the tensile strength in the first reference linear direction on the surface of the thermoplastic resin foamed sheet. An electric wire exterior body in which the ratio of the tensile strength in the second reference straight line direction orthogonal to the straight line is 50% or more and 200% or less.

本発明の態様は、前記熱可塑性樹脂発泡シートの密度が、200Kg/m以上1000Kg/m以下である電線用外装体である。 Aspect of the present invention, the density of the thermoplastic resin foam sheet is 200 Kg / m 3 or more 1000 Kg / m 3 exterior body for at which the wire less.

本発明の態様は、前記熱可塑性樹脂発泡シートの断面積に対する、前記電線の延び方向に対し直交方向における前記電線用外装体の断面積の割合が、1.1以上100以下である電線用外装体である。 In the embodiment of the present invention, the ratio of the cross-sectional area of the electric wire exterior body to the cross-sectional area of the thermoplastic resin foam sheet in the direction orthogonal to the extending direction of the electric wire is 1.1 or more and 100 or less. The body.

本発明の態様は、前記電線の延び方向に対し直交方向の前記電線用外装体の断面形状が、多角形である電線用外装体である。 An aspect of the present invention is an electric wire exterior body in which the cross-sectional shape of the electric wire exterior body in a direction orthogonal to the extending direction of the electric wire is polygonal.

本発明の態様は、外装体付きワイヤーハーネスであって、ワイヤーハーネスと、上記電線用外装体と、を備え、前記電線用外装体は、前記ワイヤーハーネスの外周に装着されている外装体付きワイヤーハーネスである。 An aspect of the present invention is a wire harness with an outer body, which includes a wire harness and the outer body for an electric wire, and the outer body for an electric wire is a wire with an outer body attached to the outer periphery of the wire harness. It is a harness.

本発明の電線用外装体の態様によれば、外側蓋壁部と重なり合って配置された内側蓋壁部が、該内側蓋壁部の両端と隣接する側壁部に支持されていることにより、機械的強度、特に、内側蓋壁部に対して鉛直方向であって外側蓋壁部から内側蓋壁部への方向の機械的強度に優れた電線用外装体の構造を得ることができる。従って、内側蓋壁部に対して外側蓋壁部から内側蓋壁部へ鉛直方向の力が負荷されても、電線用外装体が押し潰されてしまうことを防止できる。 According to the aspect of the outer body for electric wires of the present invention, the inner lid wall portion arranged so as to overlap the outer lid wall portion is supported by the side wall portions adjacent to both ends of the inner lid wall portion, whereby the machine It is possible to obtain a structure of an outer body for an electric wire which is excellent in target strength, particularly mechanical strength in a direction perpendicular to the inner lid wall portion and in a direction from the outer lid wall portion to the inner lid wall portion. Therefore, even if a force in the vertical direction is applied from the outer lid wall portion to the inner lid wall portion with respect to the inner lid wall portion, it is possible to prevent the outer body for the electric wire from being crushed.

また、外側蓋壁部と内側蓋壁部の接合前に内側蓋壁部に対して上記鉛直方向の力が負荷されても、電線用外装体が押し潰されてしまったり、内側蓋壁部が外側蓋壁部から離れてしまったりすることを防止できるので、外側蓋壁部と内側蓋壁部の接合時の接合信頼性が向上し、接合の作業性も向上する。また、内側蓋壁部と外側蓋壁部の接合時に、収容部に収容されている電線の破損を防止できる。 Further, even if the vertical force is applied to the inner lid wall portion before joining the outer lid wall portion and the inner lid wall portion, the outer body for the electric wire may be crushed or the inner lid wall portion may be damaged. Since it is possible to prevent the outer lid wall portion from being separated from the outer lid wall portion, the joining reliability at the time of joining the outer lid wall portion and the inner lid wall portion is improved, and the workability of joining is also improved. Further, when the inner lid wall portion and the outer lid wall portion are joined, it is possible to prevent the electric wire housed in the accommodating portion from being damaged.

また、上記の通り、接合の作業性も向上するので、接合作業の自動化を可能とし、電線用外装体の生産性が向上する。 Further, as described above, the workability of joining is also improved, so that the joining work can be automated and the productivity of the outer body for electric wires is improved.

本発明の電線用外装体の態様によれば、内側蓋壁部と外側蓋壁部が重なり合った部位のうち、少なくとも一部が押し込み強度5N以上、好ましくは10N以上、さらに好ましくは20N以上を有することにより、内側蓋壁部に対して上記鉛直方向の機械的強度がさらに向上して、さらに優れた外側蓋壁部と内側蓋壁部の接合信頼性が得られる。 According to the aspect of the outer body for electric wires of the present invention, at least a part of the portion where the inner lid wall portion and the outer lid wall portion overlap has a pushing strength of 5 N or more, preferably 10 N or more, and more preferably 20 N or more. As a result, the mechanical strength in the vertical direction with respect to the inner lid wall portion is further improved, and further excellent joint reliability between the outer lid wall portion and the inner lid wall portion can be obtained.

本発明の電線用外装体の態様によれば、溶着部の引張破壊強度が70N以上であることにより、さらに優れた外側蓋壁部と内側蓋壁部の接合信頼性が得られる。 According to the aspect of the outer body for electric wires of the present invention, when the tensile fracture strength of the welded portion is 70 N or more, further excellent joint reliability between the outer lid wall portion and the inner lid wall portion can be obtained.

本発明の電線用外装体の態様によれば、熱可塑性樹脂発泡シートの密度が、200Kg/m以上1000Kg/m以下であることにより、機械的特性の異方性が防止されて、さらに優れた外側蓋壁部と内側蓋壁部の接合信頼性が得られる。 According to an aspect of the electric wire outer package of the present invention, the density of the thermoplastic resin foam sheet, by not more than 200 Kg / m 3 or more 1000 Kg / m 3, is prevented anisotropy of mechanical properties, further Excellent joint reliability between the outer lid wall portion and the inner lid wall portion can be obtained.

本発明の第1実施形態例に係る外装体及び該外装体付きワイヤーハーネスを示す左側斜視図である。It is a left side perspective view which shows the exterior body which concerns on 1st Embodiment of this invention, and the wire harness with the exterior body. 本発明の第1実施形態例に係る外装体及び該外装体付きワイヤーハーネスを示す右側斜視図である。It is a right side perspective view which shows the exterior body which concerns on 1st Embodiment of this invention, and the wire harness with the exterior body. 本発明の第1実施形態例に係る外装体を展開した状態で示す説明図である。It is explanatory drawing which shows the exterior body which concerns on 1st Embodiment of this invention in the unfolded state. 本発明の第2実施形態例に係る外装体を示す斜視図である。It is a perspective view which shows the exterior body which concerns on 2nd Embodiment of this invention. 本発明の第2実施形態例に係る外装体を展開した状態で示す説明図である。It is explanatory drawing which shows the exterior body which concerns on 2nd Embodiment of this invention in the unfolded state. 本発明の第3実施形態例に係る外装体の斜視図である。It is a perspective view of the exterior body which concerns on 3rd Embodiment of this invention.

以下、本発明の実施形態例に係る電線用外装体について、図面を用いながら説明する。 Hereinafter, the exterior body for electric wires according to the embodiment of the present invention will be described with reference to the drawings.

まず、図1、2、3を用いて、本発明の第1実施形態例に係る外装体を用いた外装体付き付きワイヤーハーネスの実施形態例について説明する。本発明の実施形態例に係る外装体付きワイヤーハーネス1は、複数の電線が束ねられたワイヤーハーネス2と、ワイヤーハーネス2の外周に装着される第1実施形態例に係る外装体(電線用外装体)11と、を有する。外装体11は、ワイヤーハーネス2の延び方向(図1、2の長手方向x)に沿って延在する複数の壁部20を備えており、複数の壁部20に囲まれて形成され、ワイヤーハーネス2を収容する収容部31を有している。なお、図1、2においては、ワイヤーハーネス2を1本の円柱形状で示しているが、ワイヤーハーネス2は、1本以上の電線を束ねたものである。 First, an example of an embodiment of a wire harness with an exterior body using the exterior body according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. The wire harness 1 with an exterior body according to the embodiment of the present invention includes a wire harness 2 in which a plurality of electric wires are bundled, and an exterior body (exterior for electric wires) according to the first embodiment mounted on the outer periphery of the wire harness 2. Body) 11 and. The exterior body 11 includes a plurality of wall portions 20 extending along the extending direction of the wire harness 2 (longitudinal direction x in FIGS. 1 and 2), is formed by being surrounded by the plurality of wall portions 20, and is formed of a wire. It has an accommodating portion 31 for accommodating the harness 2. In FIGS. 1 and 2, the wire harness 2 is shown in the shape of one cylinder, but the wire harness 2 is a bundle of one or more electric wires.

第1実施形態例に係る外装体11の複数の壁部20は、1枚の熱可塑性樹脂発泡シートを折り曲げることにより一体的に形成されている。図1、2に示すように、熱可塑性樹脂発泡シートは、4つの折曲部200a〜200dを折り曲げることにより複数の壁部20が形成されている。複数の壁部20は、底壁部21と、底壁部21の端縁から折曲部200aを介して連設された第1の側壁部22と、底壁部21の端縁から折曲部200bを介して連設された第2の側壁部23と、第1の側壁部22の先端から折曲部200cを介して連設された内側蓋壁部24と、第2の側壁部23の先端から折曲部200dを介して連設された外側蓋壁部25とを有している。 The plurality of wall portions 20 of the exterior body 11 according to the first embodiment are integrally formed by bending one thermoplastic resin foam sheet. As shown in FIGS. 1 and 2, in the thermoplastic resin foam sheet, a plurality of wall portions 20 are formed by bending four bent portions 200a to 200d. The plurality of wall portions 20 are bent from the bottom wall portion 21, the first side wall portion 22 connected from the edge of the bottom wall portion 21 via the bent portion 200a, and the edge of the bottom wall portion 21. The second side wall portion 23 connected via the portion 200b, the inner lid wall portion 24 connected from the tip of the first side wall portion 22 via the bent portion 200c, and the second side wall portion 23. It has an outer lid wall portion 25 which is continuously provided from the tip of the portion via a bent portion 200d.

図1、2に示すように、外装体11の、長手方向xに対して直交方向である短手方向yの断面形状は、四角形状となっている。 As shown in FIGS. 1 and 2, the cross-sectional shape of the exterior body 11 in the lateral direction y, which is orthogonal to the longitudinal direction x, is a quadrangular shape.

図3に示すように、折曲部200a〜200dのうち折曲部200dには、後述する係止部である複数の係止片251がそれぞれ挿入可能に、長手方向xに沿って所定の間隔毎に被係止部である複数の係止孔201が形成されている。すなわち、第2の側壁部23の先端(外側蓋壁部25の基部)に係止孔201が形成されている。 As shown in FIG. 3, among the bent portions 200a to 200d, a plurality of locking pieces 251 which are locking portions described later can be inserted into the bent portions 200d at predetermined intervals along the longitudinal direction x. A plurality of locking holes 201, which are locked portions, are formed for each. That is, a locking hole 201 is formed at the tip of the second side wall portion 23 (the base portion of the outer lid wall portion 25).

図1、2に示すように、内側蓋壁部24は、長手方向xに対して直交方向である短手方向yに沿って、第1の側壁部22の先端から第2の側壁部23の先端まで、底壁部21に対して略水平に延びている。内側蓋壁部24の先端は、第2の側壁部23と接した状態となっている。内側蓋壁部24の先端は、係止孔201に挿入可能な係止片(支持部)251を有している。 As shown in FIGS. 1 and 2, the inner lid wall portion 24 is formed from the tip end of the first side wall portion 22 to the second side wall portion 23 along the lateral direction y which is orthogonal to the longitudinal direction x. It extends to the tip substantially horizontally with respect to the bottom wall portion 21. The tip of the inner lid wall portion 24 is in contact with the second side wall portion 23. The tip of the inner lid wall portion 24 has a locking piece (support portion) 251 that can be inserted into the locking hole 201.

外側蓋壁部25は、内側蓋壁部24を上から覆い重なるように配置されている。内側蓋壁部24の先端に形成された係止片251は、第2の側壁部23の先端(外側蓋壁部25の基部)に形成された係止孔201に対応して所定の間隔毎に設けられている。係止片251が係止孔201に挿入、嵌められることで、内側蓋壁部24の先端が第2の側壁部23の先端に固定され、また、内側蓋壁部24上に外側蓋壁部25が重なり合う構造を形成することが可能となっている。すなわち、係止片251が係止孔201に挿入、嵌められることで、係止片25が支持部として機能し、内側蓋壁部24は、係止手段や嵌合手段によって、第2の側壁部23に固定されている。 The outer lid wall portion 25 is arranged so as to cover and overlap the inner lid wall portion 24 from above. The locking pieces 251 formed at the tip of the inner lid wall portion 24 correspond to the locking holes 201 formed at the tip of the second side wall portion 23 (the base of the outer lid wall portion 25) at predetermined intervals. It is provided in. By inserting and fitting the locking piece 251 into the locking hole 201, the tip of the inner lid wall portion 24 is fixed to the tip of the second side wall portion 23, and the outer lid wall portion is placed on the inner lid wall portion 24. It is possible to form a structure in which 25s overlap. That is, when the locking piece 251 is inserted and fitted into the locking hole 201, the locking piece 25 functions as a support portion, and the inner lid wall portion 24 has a second side wall portion by the locking means or the fitting means. It is fixed to the portion 23.

内側蓋壁部24の先端が第2の側壁部23の先端に固定され、内側蓋壁部24の基部は第1の側壁部22の先端と一体であるため、内側蓋壁部24は、その先端において第2の側壁部23に支持され、その基部において第1の側壁部22に支持された構造となっている。 Since the tip of the inner lid wall portion 24 is fixed to the tip of the second side wall portion 23 and the base portion of the inner lid wall portion 24 is integrated with the tip of the first side wall portion 22, the inner lid wall portion 24 is the same. The structure is such that the tip is supported by the second side wall portion 23 and the base portion is supported by the first side wall portion 22.

このように、内側蓋壁部24は、その一端が第1の側壁部22に支持され、他端が第2の側壁部23に支持されていることから、内側蓋壁部24に対して外側蓋壁部25から内側蓋壁部24へ鉛直方向の力が負荷されても、外装体11が押し潰されてしまったり、内側蓋壁部24が外側蓋壁部25から離れてしまったりすることを防止できる。従って、内側蓋壁部24と外側蓋壁部25を接合する際に、内側蓋壁部24に対して上記鉛直方向の力が負荷されても、内側蓋壁部24と外側蓋壁部25を確実に接合できるので、外側蓋壁部25と内側蓋壁部24の接合信頼性が向上し、また、接合作業も容易化する。 As described above, since one end of the inner lid wall portion 24 is supported by the first side wall portion 22 and the other end is supported by the second side wall portion 23, the inner lid wall portion 24 is outside with respect to the inner lid wall portion 24. Even if a vertical force is applied from the lid wall portion 25 to the inner lid wall portion 24, the exterior body 11 may be crushed or the inner lid wall portion 24 may be separated from the outer lid wall portion 25. Can be prevented. Therefore, when the inner lid wall portion 24 and the outer lid wall portion 25 are joined, even if the vertical force is applied to the inner lid wall portion 24, the inner lid wall portion 24 and the outer lid wall portion 25 are joined. Since it can be reliably joined, the joining reliability of the outer lid wall portion 25 and the inner lid wall portion 24 is improved, and the joining work is also facilitated.

このように、接合の作業性も向上するので、接合作業の自動化を可能とし、熱可塑性樹脂発泡シートが折り曲げられて形成される外装体11の生産性が向上する。 As described above, the workability of joining is also improved, so that the joining work can be automated, and the productivity of the exterior body 11 formed by bending the thermoplastic resin foam sheet is improved.

また、内側蓋壁部24と外側蓋壁部25の接合時に、内側蓋壁部24に対して上記鉛直方向の力が負荷されても、外装体11が押し潰されてしまったり、内側蓋壁部24が外側蓋壁部25から離れてしまったりすることを防止できるので、収容部31に収容されているワイヤーハーネス2の破損を防止できる。 Further, when the inner lid wall portion 24 and the outer lid wall portion 25 are joined, even if the vertical force is applied to the inner lid wall portion 24, the exterior body 11 may be crushed or the inner lid wall may be crushed. Since it is possible to prevent the portion 24 from being separated from the outer lid wall portion 25, it is possible to prevent the wire harness 2 housed in the housing portion 31 from being damaged.

内側蓋壁部24と外側蓋壁部25の重なり合った部位の押し込み強度は、内側蓋壁部24に対して上記鉛直方向の機械的強度がさらに向上して、さらに優れた接合信頼性が得られる点から、5N以上の部分を有することが好ましく、10N以上の部分を有することがより好ましく、20N以上の部分を有することが特に好ましい。一方で、押し込み強度の上限は、特に限定されず、押し込み強度が大きい程好ましいが、例えば140Nである。 As for the pushing strength of the overlapping portion of the inner lid wall portion 24 and the outer lid wall portion 25, the mechanical strength in the vertical direction with respect to the inner lid wall portion 24 is further improved, and further excellent joining reliability can be obtained. From the point of view, it is preferable to have a portion of 5N or more, more preferably to have a portion of 10N or more, and particularly preferably to have a portion of 20N or more. On the other hand, the upper limit of the indentation strength is not particularly limited, and the larger the indentation strength is, the more preferable it is, for example, 140N.

上記押し込み強度は、引張/圧縮試験機等(例えばインストロン ジャパン社製電気式万能材料試験機3300シリーズ等)を用いて先端径5mmのプローブによる押し込み試験を実施することにより測定することができる。この際、押し込みの強度を徐々に増加させていき、内側蓋壁部24が外装体11の内部に落ち込む、または内側蓋壁部24若しくは外側蓋壁部25が座屈した強度を押し込み強度とした。 The indentation strength can be measured by performing an indentation test with a probe having a tip diameter of 5 mm using a tensile / compression tester or the like (for example, an electric universal material tester 3300 series manufactured by Instron Japan Co., Ltd.). At this time, the pushing strength is gradually increased, and the strength at which the inner lid wall portion 24 falls into the exterior body 11 or the inner lid wall portion 24 or the outer lid wall portion 25 buckles is defined as the pushing strength. ..

また、内側蓋壁部24は、外側蓋壁部25と重なり合った状態で、外側蓋壁部25と接合されている。すなわち、内側蓋壁部24の外面が外側蓋壁部25の内面と接した状態で、内側蓋壁部24と外側蓋壁部25が固定されている。外側蓋壁部25と重なり合った状態で接合された内側蓋壁部24が、その先端において第2の側壁部23に支持され、その基部において第1の側壁部22に支持されていることにより、機械的強度、特に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向の機械的強度に優れた外装体11の構造を得ることができる。従って、外装体付きワイヤーハーネス1の車両等への装着作業時や装着後に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向から力が負荷されても、外装体11が押し潰されてしまうことを防止でき、ひいては、収容部31に収容されているワイヤーハーネス2の破損を防止できる。 Further, the inner lid wall portion 24 is joined to the outer lid wall portion 25 in a state of overlapping with the outer lid wall portion 25. That is, the inner lid wall portion 24 and the outer lid wall portion 25 are fixed in a state where the outer surface of the inner lid wall portion 24 is in contact with the inner surface of the outer lid wall portion 25. The inner lid wall portion 24 joined in a state of overlapping with the outer lid wall portion 25 is supported by the second side wall portion 23 at its tip and supported by the first side wall portion 22 at its base. It is possible to obtain the structure of the exterior body 11 having excellent mechanical strength, particularly the mechanical strength in the vertical direction with respect to the inner lid wall portion 24 and the outer lid wall portion 25. Therefore, even if a force is applied to the inner lid wall portion 24 and the outer lid wall portion 25 from the vertical direction during or after mounting the wire harness 1 with an exterior body on a vehicle or the like, the exterior body 11 is pushed. It is possible to prevent the wire harness 2 from being crushed, and by extension, prevent the wire harness 2 housed in the housing portion 31 from being damaged.

内側蓋壁部24と外側蓋壁部25との接合部の位置は、特に限定されず、内側蓋壁部24が外側蓋壁部25に固定されていればよいが、例えば、接合信頼性をさらに向上させつつ優れた接合作業性を得る点から、内側蓋壁部24のうち、内側蓋壁部24の係止片251から短手方向yに延在した領域にて、外側蓋壁部25と接合されているのが好ましい。 The position of the joint portion between the inner lid wall portion 24 and the outer lid wall portion 25 is not particularly limited, and the inner lid wall portion 24 may be fixed to the outer lid wall portion 25. From the viewpoint of obtaining excellent joining workability while further improving, the outer lid wall portion 25 is located in a region of the inner lid wall portion 24 extending in the lateral direction y from the locking piece 251 of the inner lid wall portion 24. It is preferable that it is joined with.

内側蓋壁部24と外側蓋壁部25との接合手段は、特に限定されず、例えば、接着剤等を用いた接着手段、超音波溶着、熱溶着等の溶着手段、係止部材、リベット等を用いた嵌合手段、ホッチキス等を用いた貫通固定手段等を挙げることができる。このうち、接合部の機械的強度と接合作業の容易性の点から溶着手段が好ましい。 The joining means between the inner lid wall portion 24 and the outer lid wall portion 25 is not particularly limited, and for example, an adhesive means using an adhesive or the like, a welding means such as ultrasonic welding or heat welding, a locking member, a rivet, or the like. Examples include a fitting means using the above, a penetrating fixing means using a stapler, and the like. Of these, the welding means is preferable from the viewpoint of the mechanical strength of the joint portion and the ease of the joining work.

溶着手段を用いる場合の接合部の引張破壊強度は、特に限定されないが、例えば、優れた接合信頼性の点から70N以上が好ましく、100N以上がより好ましく、140N以上が特に好ましい。一方で、上記引張破壊強度の上限は、特に限定されず、引張破壊強度が大きい程好ましいが、例えば、200Nである。 The tensile fracture strength of the joint portion when the welding means is used is not particularly limited, but for example, 70 N or more is preferable, 100 N or more is more preferable, and 140 N or more is particularly preferable from the viewpoint of excellent joining reliability. On the other hand, the upper limit of the tensile fracture strength is not particularly limited, and the larger the tensile fracture strength is, the more preferable, for example, 200 N.

長手方向xに直交する断面において、熱可塑性樹脂発泡シートの断面積に対する、外装体11の断面積の割合(外装体11の断面積/熱可塑性樹脂発泡シートの断面積)は、例えば、1.1以上100以下が好ましい。前記割合は、機械的強度の点から1.2以上50以下がより好ましく、1.3以上25以下が特に好ましい。前記割合を算出するにあたり、熱可塑性樹脂発泡シートの断面積は、前記断面における熱可塑性樹脂発泡シートの平均肉厚×前記断面における熱可塑性樹脂発泡シートの周方向の長さから算出される。また、外装体11の断面積は、前記熱可塑性樹脂発泡シートの断面積+収容部31の断面積から算出される。 In the cross section orthogonal to the longitudinal direction x, the ratio of the cross-sectional area of the exterior body 11 to the cross-sectional area of the thermoplastic resin foam sheet (cross-sectional area of the exterior body 11 / cross-sectional area of the thermoplastic resin foam sheet) is, for example, 1. It is preferably 1 or more and 100 or less. From the viewpoint of mechanical strength, the ratio is more preferably 1.2 or more and 50 or less, and particularly preferably 1.3 or more and 25 or less. In calculating the ratio, the cross-sectional area of the thermoplastic resin foam sheet is calculated from the average wall thickness of the thermoplastic resin foam sheet in the cross section × the length of the thermoplastic resin foam sheet in the circumferential direction in the cross section. The cross-sectional area of the exterior body 11 is calculated from the cross-sectional area of the thermoplastic resin foam sheet + the cross-sectional area of the accommodating portion 31.

図1、2に示すように、収容部31は、底壁部21、第1の側壁部22、第2の側壁部23及び内側蓋壁部24で囲まれた部分である。収容部31は、底壁部21、第1の側壁部22、第2の側壁部23及び内側蓋壁部24により長手方向xにおける一側と他側が貫通した筒状に形成されおり、ワイヤーハーネス2を収容することができる。 As shown in FIGS. 1 and 2, the accommodating portion 31 is a portion surrounded by a bottom wall portion 21, a first side wall portion 22, a second side wall portion 23, and an inner lid wall portion 24. The accommodating portion 31 is formed in a tubular shape with one side and the other side penetrating in the longitudinal direction x by the bottom wall portion 21, the first side wall portion 22, the second side wall portion 23, and the inner lid wall portion 24. 2 can be accommodated.

次に、外装体11に用いられる熱可塑性樹脂発泡シートについて説明する。熱可塑性樹脂発泡シートの樹脂種については、熱可塑性樹脂であれば、特に限定されず、例えば、ポリエチレン樹脂、ポリプロピレン樹脂、ポリカーボネート樹脂、ポリエチレンテレフタレート樹脂、ポリブチレンテレフタレート樹脂、ポリアミド樹脂、ポリフェニレンスルファイド樹脂、ポリスチレン樹脂、ポリ塩化ビニル樹脂、ポリ酢酸ビニル樹脂、ポリテトラフルオロエチレン樹脂、アクリル樹脂等を挙げることができる。 Next, the thermoplastic resin foam sheet used for the exterior body 11 will be described. The resin type of the thermoplastic resin foam sheet is not particularly limited as long as it is a thermoplastic resin, for example, polyethylene resin, polypropylene resin, polycarbonate resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyamide resin, polyphenylensulfide resin. , Polystyrene resin, polyvinyl chloride resin, polyvinyl acetate resin, polytetrafluoroethylene resin, acrylic resin and the like.

外装体11に用いられる熱可塑性樹脂発泡シートの密度は、特に限定されないが、例えば、機械的特性の異方性が防止されて、さらに優れた内側蓋壁部24と外側蓋壁部25の接合信頼性が得られるとともに、外装体11の設計の自由度が向上する点から、200Kg/m以上1000Kg/m以下が好ましく、軽量性と機械的強度とのバランスをより向上させる点から、300Kg/m以上600Kg/m以下がより好ましく、350Kg/m以上550Kg/m以下が特に好ましい。所定の密度を有する熱可塑性樹脂発泡シートが折り曲げられることで、外装体11が形成される。 The density of the thermoplastic resin foam sheet used for the exterior body 11 is not particularly limited, but for example, the anisotropy of mechanical properties is prevented and the inner lid wall portion 24 and the outer lid wall portion 25 are more excellently joined. the reliability can be obtained, from the viewpoint of improving the degree of freedom in design of the exterior body 11, preferably from 200 Kg / m 3 or more 1000 Kg / m 3 or less, from the viewpoint of further improving the balance between light weight and mechanical strength, 300 kg / m 3 or more 600 Kg / m 3 and more preferably less, 350 Kg / m 3 or more 550 kg / m 3 or less is particularly preferred. The exterior body 11 is formed by bending the thermoplastic resin foam sheet having a predetermined density.

熱可塑性樹脂発泡シートの厚さは、特に限定されないが、例えば、折り曲げ容易性と機械的強度とのバランスをより向上させる点から、0.80mm以上5.0mm以下が好ましく、1.0mm以上2.5mm以下が特に好ましい。 The thickness of the thermoplastic resin foam sheet is not particularly limited, but is preferably 0.80 mm or more and 5.0 mm or less, and 1.0 mm or more 2 from the viewpoint of further improving the balance between foldability and mechanical strength. 5.5 mm or less is particularly preferable.

また、熱可塑性樹脂発泡シートには、両面または片面に、非発泡層を有していてもよい。すなわち、熱可塑性樹脂発泡シートは、発泡層と該発泡層上に形成された非発泡層とを有する構成としてもよい。熱可塑性樹脂発泡シートの表面に非発泡層が形成されていることにより、外装体11の曲げ弾性が向上して、収容されるワイヤーハーネス2の保護性能がより向上する。なお、外装体11の曲げ弾性をより向上させる点から、熱可塑性樹脂発泡シートの両面に非発泡層を有する3層構造の構成が好ましい。 Further, the thermoplastic resin foam sheet may have a non-foamed layer on both sides or one side. That is, the thermoplastic resin foam sheet may have a structure having a foam layer and a non-foam layer formed on the foam layer. Since the non-foamed layer is formed on the surface of the thermoplastic resin foam sheet, the bending elasticity of the exterior body 11 is improved, and the protective performance of the housed wire harness 2 is further improved. From the viewpoint of further improving the bending elasticity of the exterior body 11, a three-layer structure having non-foamed layers on both sides of the thermoplastic resin foamed sheet is preferable.

非発泡層の厚さは、特に限定されないが、例えば、10μm以上100μm以下が挙げられる。 The thickness of the non-foamed layer is not particularly limited, and examples thereof include 10 μm and more and 100 μm or less.

また、熱可塑性樹脂発泡シートの発泡層の気泡数密度は、特に限定されないが、例えば、その下限値は、機械的特性の異方性をより確実に防止して内側蓋壁部24と外側蓋壁部25との接合信頼性をより向上させる点から、800個/mm以上が好ましく、1000個/mm以上が特に好ましい。一方で、上記気泡数密度の上限値は、例えば、優れた機械的強度を得る点から、1010個/mm以下を挙げることができる。 Further, the number density of bubbles in the foam layer of the thermoplastic resin foam sheet is not particularly limited, but for example, the lower limit thereof more reliably prevents the anisotropy of mechanical properties, and the inner lid wall portion 24 and the outer lid. From the viewpoint of further improving the joint reliability with the wall portion 25, 800 pieces / mm 3 or more is preferable, and 1000 pieces / mm 3 or more is particularly preferable. On the other hand, the upper limit of the number density of bubbles can be, for example, 10 10 cells / mm 3 or less from the viewpoint of obtaining excellent mechanical strength.

熱可塑性樹脂発泡シート面上における任意の第1の基準直線方向の引張強さに対する、該第1の基準直線に対し直交する第2の基準直線方向の引張強さの割合は、特に限定されないが、例えば、50%以上200%以下、より好ましくは60%以上180%以下、さらに好ましくは80%以上120%以下である。熱可塑性樹脂発泡シートが上記引張強さの割合の範囲を有することにより、機械的特性の等方性をより向上させることができるので、内側蓋壁部24と外側蓋壁部25との接合信頼性をより向上させることができる。 The ratio of the tensile strength in the second reference straight line direction orthogonal to the first reference straight line to the tensile strength in the arbitrary first reference straight line direction on the surface of the thermoplastic resin foam sheet is not particularly limited. For example, it is 50% or more and 200% or less, more preferably 60% or more and 180% or less, and further preferably 80% or more and 120% or less. Since the thermoplastic resin foam sheet has the range of the tensile strength ratio, the isotropic properties of the mechanical properties can be further improved, so that the joint reliability between the inner lid wall portion 24 and the outer lid wall portion 25 can be improved. The sex can be further improved.

また、熱可塑性樹脂発泡シートの引張強さは、特に限定されないが、その下限値は、収容されるワイヤーハーネス2の保護性能がより向上する点から3MPa以上が好ましく、4MPa以上がより好ましく、6MPa以上が特に好ましい。一方で、上記引張強さの上限値は、外装体11の成形性の点から10MPa以下が好ましい。 The tensile strength of the thermoplastic resin foam sheet is not particularly limited, but the lower limit thereof is preferably 3 MPa or more, more preferably 4 MPa or more, and 6 MPa from the viewpoint of further improving the protection performance of the housed wire harness 2. The above is particularly preferable. On the other hand, the upper limit of the tensile strength is preferably 10 MPa or less from the viewpoint of moldability of the exterior body 11.

次に、本発明の第2実施形態例に係る外装体について、図面を用いながら説明する。なお、第1実施形態例に係る外装体と同じ構成要素については、同じ符号を用いて説明する。 Next, the exterior body according to the second embodiment of the present invention will be described with reference to the drawings. The same components as the exterior body according to the first embodiment will be described with reference to the same reference numerals.

上記第1実施形態例に係る外装体11では、短手方向yの断面形状は四角形状となっていたが、これに代えて、図4に示すように、第2実施形態例に係る外装体12では、短手方向yの断面形状は三角形状である。 In the exterior body 11 according to the first embodiment, the cross-sectional shape in the lateral direction y is quadrangular, but instead, as shown in FIG. 4, the exterior body according to the second embodiment In No. 12, the cross-sectional shape in the lateral direction y is triangular.

図4、5に示すように、熱可塑性樹脂発泡シートは、3つの折曲部200e〜200gを折り曲げることにより複数の壁部20が形成されている。複数の壁部20は、第1の側壁部22と、第1の側壁部22の端縁から折曲部200eを介して連設された内側蓋壁部24と、第1の側壁部22の端縁から折曲部200fを介して連設された第2の側壁部23と、第2の側壁部23の先端から折曲部200gを介して連設された外側蓋壁部25とを有している。すなわち、外装体12では、底壁部は存在せず、第1の側壁部22の基部と第2の側壁部23の基部が直接連なった構成となっている。 As shown in FIGS. 4 and 5, a plurality of wall portions 20 are formed by bending three bent portions 200e to 200 g in the thermoplastic resin foam sheet. The plurality of wall portions 20 are formed by the first side wall portion 22, the inner lid wall portion 24 connected from the edge of the first side wall portion 22 via the bent portion 200e, and the first side wall portion 22. It has a second side wall portion 23 connected from the edge edge via the bent portion 200f, and an outer lid wall portion 25 connected continuously from the tip of the second side wall portion 23 via the bent portion 200 g. doing. That is, in the exterior body 12, the bottom wall portion does not exist, and the base portion of the first side wall portion 22 and the base portion of the second side wall portion 23 are directly connected to each other.

図5に示すように、折曲部200e〜200gのうち折曲部200gには、後述する係止部である複数の係止片251がそれぞれ挿入可能に、長手方向xに沿って所定の間隔毎に被係止部である複数の係止孔201が形成されている。すなわち、第2の側壁部23の先端(外側蓋壁部25の基部)に係止孔201が形成されている。 As shown in FIG. 5, of the bent portions 200e to 200 g, a plurality of locking pieces 251 which are locking portions described later can be inserted into the bent portions 200 g at predetermined intervals along the longitudinal direction x. A plurality of locking holes 201, which are locked portions, are formed for each. That is, a locking hole 201 is formed at the tip of the second side wall portion 23 (the base portion of the outer lid wall portion 25).

また、図4に示すように、内側蓋壁部24は、短手方向yに沿って、第1の側壁部22の先端から第2の側壁部23の先端まで直線状に延びている。内側蓋壁部24の先端は、第2の側壁部23と接した状態となっている。内側蓋壁部24の先端は、係止孔201に挿入可能な係止片(支持部)251を有している。 Further, as shown in FIG. 4, the inner lid wall portion 24 extends linearly from the tip of the first side wall portion 22 to the tip of the second side wall portion 23 along the lateral direction y. The tip of the inner lid wall portion 24 is in contact with the second side wall portion 23. The tip of the inner lid wall portion 24 has a locking piece (support portion) 251 that can be inserted into the locking hole 201.

外側蓋壁部25は、内側蓋壁部24を上から覆い重なるように配置されている。係止片251が係止孔201に挿入、嵌められることで、内側蓋壁部24の先端が第2の側壁部23の先端に固定され、また、内側蓋壁部24上に外側蓋壁部25が重なり合う構造を形成することが可能となる。すなわち、係止片251が係止孔201に挿入、嵌められることで、係止片25が支持部として機能する。 The outer lid wall portion 25 is arranged so as to cover and overlap the inner lid wall portion 24 from above. By inserting and fitting the locking piece 251 into the locking hole 201, the tip of the inner lid wall portion 24 is fixed to the tip of the second side wall portion 23, and the outer lid wall portion is placed on the inner lid wall portion 24. It is possible to form a structure in which 25s overlap. That is, when the locking piece 251 is inserted and fitted into the locking hole 201, the locking piece 25 functions as a support portion.

外装体12でも、内側蓋壁部24の先端が第2の側壁部23の先端に固定され、内側蓋壁部24の基部は第1の側壁部22の先端と一体であるため、内側蓋壁部24は、その先端において第2の側壁部23に支持され、その基部において第1の側壁部22に支持された構造となっている。すなわち、内側蓋壁部24は、その一端が第1の側壁部22に支持され、他端が第2の側壁部23に支持されている構造となっている。 Even in the exterior body 12, the tip of the inner lid wall portion 24 is fixed to the tip of the second side wall portion 23, and the base of the inner lid wall portion 24 is integrated with the tip of the first side wall portion 22, so that the inner lid wall The portion 24 has a structure in which the portion 24 is supported by the second side wall portion 23 at the tip thereof and is supported by the first side wall portion 22 at the base portion thereof. That is, the inner lid wall portion 24 has a structure in which one end thereof is supported by the first side wall portion 22 and the other end is supported by the second side wall portion 23.

上記から、第2実施形態例に係る外装体12でも、第1実施形態例に係る外装体11と同様に、内側蓋壁部24に対して外側蓋壁部25から内側蓋壁部24へ鉛直方向の力が負荷されても、外装体12が押し潰されてしまったり、内側蓋壁部24が外側蓋壁部25から離れてしまったりすることを防止できる。従って、内側蓋壁部24と外側蓋壁部25を接合する際に、内側蓋壁部24に対して上記鉛直方向の力が負荷されても、内側蓋壁部24と外側蓋壁部25を確実に接合できるので、外側蓋壁部25と内側蓋壁部24の接合信頼性が向上し、収容部31に収容されているワイヤーハーネスの破損を防止できる。 From the above, also in the exterior body 12 according to the second embodiment, similarly to the exterior body 11 according to the first embodiment, the outer lid wall portion 25 is vertically connected to the inner lid wall portion 24 with respect to the inner lid wall portion 24. Even if a force in the direction is applied, it is possible to prevent the exterior body 12 from being crushed and the inner lid wall portion 24 from being separated from the outer lid wall portion 25. Therefore, when the inner lid wall portion 24 and the outer lid wall portion 25 are joined, even if the vertical force is applied to the inner lid wall portion 24, the inner lid wall portion 24 and the outer lid wall portion 25 are joined. Since it can be reliably joined, the joining reliability of the outer lid wall portion 25 and the inner lid wall portion 24 is improved, and the wire harness housed in the housing portion 31 can be prevented from being damaged.

また、外装体12も、内側蓋壁部24は、外側蓋壁部25と重なり合った状態で外側蓋壁部25と接合されており、内側蓋壁部24は、その先端において第2の側壁部23に支持され、その基部において第1の側壁部22に支持されている。よって、第2実施形態例に係る外装体12でも、第1実施形態例に係る外装体11と同様に、機械的強度、特に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向の機械的強度に優れた外装体12の構造を得ることができるので、車両等への装着作業時や装着後に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向から力が負荷されても、外装体12が押し潰されてしまうことを防止できる。 Further, in the exterior body 12, the inner lid wall portion 24 is joined to the outer lid wall portion 25 in a state of overlapping with the outer lid wall portion 25, and the inner lid wall portion 24 has a second side wall portion at the tip thereof. It is supported by 23 and is supported by a first side wall 22 at its base. Therefore, the exterior body 12 according to the second embodiment also has the same vertical strength as the exterior body 11 according to the first embodiment, particularly with respect to the inner lid wall portion 24 and the outer lid wall portion 25. Since the structure of the exterior body 12 having excellent mechanical strength in the direction can be obtained, a force is applied to the inner lid wall portion 24 and the outer lid wall portion 25 from the vertical direction during or after mounting on a vehicle or the like. Can be prevented from being crushed even if the exterior body 12 is loaded.

次に、本発明の第3実施形態例に係る外装体について、図面を用いながら説明する。なお、第1、第2実施形態例に係る外装体と同じ構成要素については、同じ符号を用いて説明する。 Next, the exterior body according to the third embodiment of the present invention will be described with reference to the drawings. The same components as the exterior body according to the first and second embodiments will be described with reference to the same reference numerals.

第1、第2実施形態例に係る外装体では、支持部として、内側蓋壁部24の先端に係止部である係止片251を備えていたが、これに代えて、図6に示すように、第3実施形態例に係る外装体13では、内側蓋壁部24の先端に支持体300を備えている。 In the exterior body according to the first and second embodiments, a locking piece 251 which is a locking portion is provided at the tip of the inner lid wall portion 24 as a supporting portion, but instead of this, it is shown in FIG. As described above, in the exterior body 13 according to the third embodiment, the support 300 is provided at the tip of the inner lid wall portion 24.

支持体300は、内側蓋壁部24の先端と折り曲げ部301を介して連設している。すなわち、支持体300は、内側蓋壁部24から伸延する部分の折り返し構造となっている。また、支持体300の先端は、底壁部21内面と当接している。支持体300は第2の側壁部23内面に沿って延在している。支持体300は、外装体13の長手方向に外装体13の一端から他端まで延在していてもよく、外装体13の長手方向の一部に形成されていてもよい。 The support 300 is connected to the tip of the inner lid wall portion 24 via the bent portion 301. That is, the support 300 has a folded structure of a portion extending from the inner lid wall portion 24. Further, the tip of the support 300 is in contact with the inner surface of the bottom wall portion 21. The support 300 extends along the inner surface of the second side wall portion 23. The support 300 may extend from one end to the other end of the exterior body 13 in the longitudinal direction of the exterior body 13, or may be formed in a part of the exterior body 13 in the longitudinal direction.

外装体13では、支持体300が第2の側壁部23に沿って延在し、その先端が底壁部21と当接することで支持部として機能し、内側蓋壁部24の先端が第2の側壁部23に支持される。外装体13でも、内側蓋壁部24の基部は第1の側壁部22の先端と一体であるため、内側蓋壁部24は、その先端において第2の側壁部23に支持され、その基部において第1の側壁部22に支持された構造となっている。すなわち、内側蓋壁部24は、その一端が第1の側壁部22に支持され、他端が第2の側壁部23に支持されている構造となっている。 In the exterior body 13, the support 300 extends along the second side wall portion 23, and the tip thereof abuts on the bottom wall portion 21 to function as a support portion, and the tip of the inner lid wall portion 24 is the second. It is supported by the side wall portion 23 of the. Even in the exterior body 13, since the base portion of the inner lid wall portion 24 is integrated with the tip of the first side wall portion 22, the inner lid wall portion 24 is supported by the second side wall portion 23 at the tip thereof, and at the base portion thereof. It has a structure supported by the first side wall portion 22. That is, the inner lid wall portion 24 has a structure in which one end thereof is supported by the first side wall portion 22 and the other end is supported by the second side wall portion 23.

従って、第3実施形態例に係る外装体13でも、第1、第2実施形態例に係る外装体11、12と同様に、内側蓋壁部24と外側蓋壁部25を接合する際に、内側蓋壁部24に対して外側蓋壁部25から内側蓋壁部24へ鉛直方向の力が負荷されても、内側蓋壁部24と外側蓋壁部25を確実に接合できるので、外側蓋壁部25と内側蓋壁部24の接合信頼性が向上し、収容部31に収容されているワイヤーハーネスの破損を防止できる。 Therefore, in the exterior body 13 according to the third embodiment, as in the exterior bodies 11 and 12 according to the first and second embodiments, when the inner lid wall portion 24 and the outer lid wall portion 25 are joined, the outer lid wall portion 25 is joined. Even if a vertical force is applied from the outer lid wall portion 25 to the inner lid wall portion 24 with respect to the inner lid wall portion 24, the inner lid wall portion 24 and the outer lid wall portion 25 can be reliably joined, so that the outer lid can be joined. The joint reliability between the wall portion 25 and the inner lid wall portion 24 is improved, and damage to the wire harness housed in the housing portion 31 can be prevented.

また、第3実施形態例に係る外装体13でも、第1、第2実施形態例に係る外装体11、12と同様に、機械的強度、特に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向の機械的強度に優れた外装体13の構造を得ることができるので、車両等への装着作業時や装着後に、内側蓋壁部24及び外側蓋壁部25に対して上記鉛直方向から力が負荷されても、外装体13が押し潰されてしまうことを防止できる。 Further, the exterior body 13 according to the third embodiment also has mechanical strength, particularly the inner lid wall portion 24 and the outer lid wall portion 25, similarly to the exterior bodies 11 and 12 according to the first and second embodiments. On the other hand, since the structure of the exterior body 13 having excellent mechanical strength in the vertical direction can be obtained, the inner lid wall portion 24 and the outer lid wall portion 25 can be mounted during or after mounting on a vehicle or the like. Even if a force is applied from the vertical direction, it is possible to prevent the exterior body 13 from being crushed.

次に、本発明の実施形態例に係る外装体の形成方法、及び外装体へワイヤーハーネスを装着して外装体付きワイヤーハーネスを形成する方法について、それぞれ説明する。ここでは、第1実施形態例に係る外装体11の形成方法、及び第1実施形態例に係る外装体11へワイヤーハーネス2を装着して外装体付きワイヤーハーネス1を形成する方法を例にとって説明する。 Next, a method of forming the exterior body according to the embodiment of the present invention and a method of attaching the wire harness to the exterior body to form the wire harness with the exterior body will be described. Here, a method of forming the exterior body 11 according to the first embodiment and a method of attaching the wire harness 2 to the exterior body 11 according to the first embodiment to form the wire harness 1 with the exterior body will be described as an example. To do.

外装体11の形成方法では、先ず、外装体11を形成するための母材となる熱可塑性樹脂発泡シートから、外装体11に相当する部分を切り出す、切り出し加工を行う。切り出し加工としては、例えば、トムソン刃金型での打ち抜き等が挙げられる。 In the method of forming the exterior body 11, first, a portion corresponding to the exterior body 11 is cut out from a thermoplastic resin foam sheet which is a base material for forming the exterior body 11. Examples of the cutting process include punching with a Thomson blade die.

上記のように形成された外装体11をワイヤーハーネス2へ装着する方法では、先ず、底壁部21に対して第1の側壁部22、第2の側壁部23が略垂直となるように、折曲部200a,200bで折り曲げる。折曲部200a,200bで折り曲げると、第1の側壁部22の先端と第2の側壁部23の先端との間が長手方向xに沿って上方に開口した形状となる。 In the method of attaching the exterior body 11 formed as described above to the wire harness 2, first, the first side wall portion 22 and the second side wall portion 23 are substantially perpendicular to the bottom wall portion 21. Bend at the bent portions 200a and 200b. When bent at the bent portions 200a and 200b, a shape is formed in which the tip of the first side wall portion 22 and the tip of the second side wall portion 23 are opened upward along the longitudinal direction x.

折曲部200a,200bを折り曲げた後、底壁部21にワイヤーハーネス2を載置し、底壁部21に対して内側蓋壁部24が略平行となるように、折曲部200cで折り曲げる。折曲部200cで内側蓋壁部24を折り曲げると、収容部31内にワイヤーハーネス2が挿通された状態で収容される。次に、内側蓋壁部24の係止片251を、それぞれ、第2の側壁部23の先端に形成された係止孔201に挿入して係止する。係止片251を係止孔201に係止することで、内側蓋壁部24を第2の側壁部23の先端に固定する。次に、底壁部21に対して外側蓋壁部25が略平行となるように、折曲部200dで折り曲げる。折曲部200dで外側蓋壁部25を折り曲げると、内側蓋壁部24上に外側蓋壁部25が重なり合う構造が形成される。 After bending the bent portions 200a and 200b, the wire harness 2 is placed on the bottom wall portion 21 and bent at the bent portion 200c so that the inner lid wall portion 24 is substantially parallel to the bottom wall portion 21. .. When the inner lid wall portion 24 is bent at the bent portion 200c, the wire harness 2 is accommodated in the accommodating portion 31 in a state of being inserted. Next, the locking piece 251 of the inner lid wall portion 24 is inserted into the locking hole 201 formed at the tip of the second side wall portion 23 to lock the inner lid wall portion 24, respectively. By locking the locking piece 251 to the locking hole 201, the inner lid wall portion 24 is fixed to the tip of the second side wall portion 23. Next, the outer lid wall portion 25 is bent at the bent portion 200d so as to be substantially parallel to the bottom wall portion 21. When the outer lid wall portion 25 is bent at the bent portion 200d, a structure is formed in which the outer lid wall portion 25 overlaps the inner lid wall portion 24.

次に、例えば、外側蓋壁部25上に鉛直方向から加熱手段を押し当てて、内側蓋壁部24と外側蓋壁部25を溶着することにより、第1の側壁部22,第2の側壁部23の先端の間の開口が塞がれた状態が固定され、外装体11がワイヤーハーネス2の外周に装着される。 Next, for example, by pressing the heating means vertically onto the outer lid wall portion 25 and welding the inner lid wall portion 24 and the outer lid wall portion 25, the first side wall portion 22 and the second side wall portion 22 are welded. The state in which the opening between the tips of the portions 23 is closed is fixed, and the exterior body 11 is attached to the outer periphery of the wire harness 2.

なお、外装体11は、ワイヤーハーネス2を構成する複数の電線を分散しないように固定するための固定用テープの外周に装着されていてもよく、固定用テープを使用していない複数の電線の外周に装着されていてもよい。また、外装体11は、1本の電線の外周に装着されていてもよい。 The exterior body 11 may be attached to the outer circumference of the fixing tape for fixing the plurality of electric wires constituting the wire harness 2 so as not to disperse, and may be attached to the outer periphery of the fixing tape, and the plurality of electric wires not using the fixing tape may be attached. It may be mounted on the outer circumference. Further, the exterior body 11 may be mounted on the outer circumference of one electric wire.

次に、本発明の他の実施形態例について説明する。上記第1、第3実施形態例に係る外装体では短手方向の断面形状は四角形状、第2実施形態例に係る外装体では短手方向の断面形状は三角形状であったが、これに代えて、五角形以上の多角形でもよい。 Next, another embodiment of the present invention will be described. In the exterior body according to the first and third embodiments, the cross-sectional shape in the lateral direction is polygonal, and in the exterior body according to the second embodiment, the cross-sectional shape in the lateral direction is triangular. Alternatively, it may be a polygon of pentagon or more.

また、上記各実施形態例に係る外装体では、ワイヤーハーネスが略直線状に延在していることに対応して、複数の壁部は、ワイヤーハーネスの延び方向に沿って直線状に形成されていたが、これに代えて、複数の壁部は、延在方向の途中で、ワイヤーハーネスの形状に沿うように分岐されていてもよく、また、ワイヤーハーネスの形状に沿うように曲げられていてもよい。また、収容部は、ワイヤーハーネスの形状に沿うように、拡径、縮径されていてもよい。 Further, in the exterior body according to each of the above embodiments, the plurality of wall portions are formed linearly along the extending direction of the wire harness, corresponding to the wire harness extending substantially linearly. However, instead of this, the plurality of walls may be branched along the shape of the wire harness in the middle of the extending direction, and may be bent along the shape of the wire harness. You may. Further, the accommodating portion may be expanded or reduced in diameter so as to follow the shape of the wire harness.

本発明では、優れた機械的強度を有し、接合部の接合信頼性に優れた電線用外装体を形成できるので、例えば、自動車に配索されるワイヤーハーネスの外装体の分野で利用価値が高い。 In the present invention, it is possible to form an outer body for electric wires having excellent mechanical strength and excellent joint reliability at the joint portion, and therefore, for example, it is useful in the field of the outer body of a wire harness distributed to an automobile. high.

1 外装体付きワイヤーハーネス
2 ワイヤーハーネス
11、12、13 外装体(電線用外装体)
20 壁部
21 底壁部
22 第1の側壁部
23 第2の側壁部
24 内側蓋壁部
25 外側蓋壁部
31 収容部
200a 折曲部
200b 折曲部
200c 折曲部
200d 折曲部
200e 折曲部
200f 折曲部
200g 折曲部
201 係止孔
251 係止片
300 支持体
1 Wire harness with exterior body 2 Wire harness 11, 12, 13 Exterior body (outer body for electric wire)
20 Wall 21 Bottom wall 22 First side wall 23 Second side wall 24 Inner lid wall 25 Outer lid wall 31 Containment part 200a Folded part 200b Folded part 200c Folded part 200d Folded part 200e Bent part 200f Bent part 200g Bent part 201 Locking hole 251 Locking piece 300 Support

Claims (12)

熱可塑性樹脂発泡シートが折り曲げられて形成された、電線の外周に装着される電線用外装体であって、
前記電線の延び方向に沿って延在し、前記電線を収容する収容部を形成する複数の壁部を備え、前記複数の壁部が、外側蓋壁部と、該外側蓋壁部と重なり合って接合された内側蓋壁部と、前記内側蓋壁部の両端と隣接する側壁部と、を有し、
前記内側蓋壁部が、両端の前記側壁部に支持される支持部を有する電線用外装体。
An exterior body for an electric wire, which is formed by bending a thermoplastic resin foam sheet and is attached to the outer circumference of the electric wire.
A plurality of wall portions extending along the extending direction of the electric wire and forming an accommodating portion for accommodating the electric wire are provided, and the plurality of wall portions overlap the outer lid wall portion and the outer lid wall portion. It has a joined inner lid wall portion and side wall portions adjacent to both ends of the inner lid wall portion.
An electric wire exterior body in which the inner lid wall portion has support portions supported by the side wall portions at both ends.
前記内側蓋壁部が前記外側蓋壁部と重なり合った部位のうち、少なくとも一部が、押し込み強度5N以上を有する請求項1に記載の電線用外装体。 The exterior body for an electric wire according to claim 1, wherein at least a part of the portion where the inner lid wall portion overlaps with the outer lid wall portion has a pushing strength of 5 N or more. 前記内側蓋壁部と前記外側蓋壁部との接合手段が、接着、溶着及び/または嵌合手段である請求項1または2に記載の電線用外装体。 The exterior body for an electric wire according to claim 1 or 2, wherein the means for joining the inner lid wall portion and the outer lid wall portion is an adhesive, welding and / or fitting means. 前記接合手段が溶着であり、溶着部の引張破壊強度が70N以上である請求項に記載の電線用外装体。 The exterior body for an electric wire according to claim 3 , wherein the joining means is welded and the tensile fracture strength of the welded portion is 70 N or more. 前記支持部が係止部を備え、該係止部が一方の前記側壁部に設けられた被係止部に係止されて、前記内側蓋壁部が両端の前記側壁部に支持されている請求項1乃至4のいずれか1項に記載の電線用外装体。 The support portion includes a locking portion, the locking portion is locked to a locked portion provided on one of the side wall portions, and the inner lid wall portion is supported by the side wall portions at both ends. The exterior body for an electric wire according to any one of claims 1 to 4. 前記内側蓋壁部が、前記係止部から前記電線の延び方向に対し直交方向に延在した部位にて、前記外側蓋壁部と接合されている請求項5に記載の電線用外装体。 The exterior body for an electric wire according to claim 5, wherein the inner lid wall portion is joined to the outer lid wall portion at a portion extending in a direction orthogonal to the extending direction of the electric wire from the locking portion. 前記支持部が支持体を備え、該支持体が一方の前記側壁部に沿って延在して、前記内側蓋壁部が両端の前記側壁部に支持されている請求項1乃至4のいずれか1項に記載の電線用外装体。 One of claims 1 to 4, wherein the support portion includes a support, the support portion extends along one of the side wall portions, and the inner lid wall portion is supported by the side wall portions at both ends. The outer body for electric wires according to item 1. 前記熱可塑性樹脂発泡シートが、引張強さ3MPa以上10MPa以下であり、前記熱可塑性樹脂発泡シート面上における第1の基準直線方向の引張強さに対する、該第1の基準直線に対し直交する第2の基準直線方向の引張強さの割合が、50%以上200%以下である請求項1乃至7のいずれか1項に記載の電線用外装体。 The thermoplastic resin foam sheet has a tensile strength of 3 MPa or more and 10 MPa or less, and is orthogonal to the first reference straight line with respect to the tensile strength in the first reference straight line direction on the surface of the thermoplastic resin foam sheet. The exterior body for an electric wire according to any one of claims 1 to 7, wherein the ratio of the tensile strength in the reference linear direction of 2 is 50% or more and 200% or less. 前記熱可塑性樹脂発泡シートの密度が、200Kg/m以上1000Kg/m以下である請求項1乃至8のいずれか1項に記載の電線用外装体。 The thermoplastic resin density foam sheet, 200 Kg / m 3 or more 1000 Kg / m 3 wire sheathing body according to any one of the which claims 1-8 below. 前記熱可塑性樹脂発泡シートの断面積に対する、前記電線の延び方向に対し直交方向における前記電線用外装体の断面積の割合が、1.1以上100以下である請求項1乃至9のいずれか1項に記載の電線用外装体。 Any one of claims 1 to 9, wherein the ratio of the cross-sectional area of the outer body for the electric wire in the direction orthogonal to the extending direction of the electric wire to the cross-sectional area of the thermoplastic resin foam sheet is 1.1 or more and 100 or less. The exterior body for electric wires described in the section. 前記電線の延び方向に対し直交方向の前記電線用外装体の断面形状が、多角形である請求項1乃至10のいずれか1項に記載の電線用外装体。 The electric wire outer body according to any one of claims 1 to 10, wherein the cross-sectional shape of the electric wire outer body in a direction orthogonal to the extending direction of the electric wire is polygonal. 外装体付きワイヤーハーネスであって、
ワイヤーハーネスと、
請求項1乃至11のいずれか1項に記載の電線用外装体と、を備え、
前記電線用外装体は、前記ワイヤーハーネスの外周に装着されている外装体付きワイヤーハーネス。
A wire harness with an exterior
With a wire harness
The electric wire exterior body according to any one of claims 1 to 11 is provided.
The outer body for electric wires is a wire harness with an outer body attached to the outer periphery of the wire harness.
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