JP6374898B2 - Manufacturing method of wire harness - Google Patents

Manufacturing method of wire harness Download PDF

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JP6374898B2
JP6374898B2 JP2016054986A JP2016054986A JP6374898B2 JP 6374898 B2 JP6374898 B2 JP 6374898B2 JP 2016054986 A JP2016054986 A JP 2016054986A JP 2016054986 A JP2016054986 A JP 2016054986A JP 6374898 B2 JP6374898 B2 JP 6374898B2
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wire
electric wire
damming
row
mold
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JP2016207642A (en
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公利 牧野
公利 牧野
哲朗 斉本
哲朗 斉本
明仁 澁谷
明仁 澁谷
聖享 山本
聖享 山本
杵塚　健二
健二 杵塚
進也 松浦
進也 松浦
鈴木　康弘
康弘 鈴木
隆史 森
隆史 森
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Yazaki Corp
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Yazaki Corp
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Priority to US15/098,095 priority Critical patent/US10361543B2/en
Priority to CN201610236606.4A priority patent/CN106058562B/en
Priority to DE102016206393.6A priority patent/DE102016206393A1/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Manufacturing Of Electric Cables (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

本発明は、ワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法に関する。   The present invention relates to a wire harness countermeasure structure and a method of manufacturing a wire harness.

複数の電線を束ねたワイヤハーネスの止水構造として、１液止水（シリコン）や、ブチルゴムを用いるものがある。１液止水による止水構造は、図１５の（ａ）に示すように、電線束を個々の電線５０１にばらして、シリコン５０３を塗布し、なじませ、成形し、固化させる。固化させたシリコン５０３の外周は、シート材５０５によって覆われる。このようにして止水構造が付与されたワイヤハーネスは、シート材５０５の外周にグロメット５０７が外挿される。グロメット５０７は、シート材５０５と車体パネル等のハーネス挿通穴（図示略）の間を止水する。   As a water stopping structure of a wire harness in which a plurality of electric wires are bundled, there are one using one liquid water stopping (silicon) or butyl rubber. As shown in FIG. 15 (a), the water stop structure with one liquid water stop is obtained by spreading the wire bundle into individual wires 501, applying silicon 503, blending, shaping, and solidifying. The outer periphery of the solidified silicon 503 is covered with a sheet material 505. Thus, the grommet 507 is extrapolated to the outer periphery of the sheet material 505 as for the wire harness provided with the water stop structure. Grommet 507 stops water between sheet material 505 and a harness insertion hole (not shown) such as a vehicle body panel.

また、ブチルゴムによる止水構造は、図１５の（ｂ）に示すように、電線束を個々の電線５０１にばらしてブチルゴム５０９の上に乗せ、ブチルゴム５０９と電線５０１の敷きを繰り返し、加圧して電線間にブチルゴム５０９を充墳し、成形する。ブチルゴム５０９の外周は、粘着テープ５１１によって巻かれる。このようにして止水構造が付与されたワイヤハーネスは、粘着テープ５１１の外周にシールスポンジ５１３が巻かれる。シールスポンジ５１３は、粘着テープ５１１とハーネス挿通穴（図示略）の間を止水する。   Further, as shown in FIG. 15 (b), the water-stopping structure using butyl rubber is obtained by separating the electric wire bundles into individual electric wires 501 and placing them on the butyl rubber 509, and repeatedly laying the butyl rubber 509 and the electric wires 501 under pressure. Butyl rubber 509 is filled between the wires and molded. The outer periphery of the butyl rubber 509 is wound with an adhesive tape 511. Thus, the seal sponge 513 is wound around the outer periphery of the adhesive tape 511 in the wire harness to which the water stop structure is provided. The seal sponge 513 stops water between the adhesive tape 511 and the harness insertion hole (not shown).

特開２０１１−１７２４１２号公報JP 2011-172412 A

しかしながら、上述の１液止水による止水構造は、電線間に止水剤（シリコン５０３）が充填されて電線被覆と接着する。このため、止水性能は非常に優れているが、止水剤の管理が困難であるほか、固化するまでに数時間程度を必要とすることから、作業性がよくなかった。また、上述のブチルゴム５０９による止水構造は、電線間に止水剤（ブチルゴム５０９）が充填され、ブチルゴム自体が柔らかく、なじみ易く、それでいて接着性があるので、確実に充填されれば止水性能は優れるが、使用ブチルゴム量の管理が困難な問題がある。更に、ブチルゴム５０９による止水構造は、ブチルゴム５０９がベタベタしていて手に付くなど作業性が悪いとともに、充填状況の確認が行いにくい。   However, in the above-described water stop structure using one liquid water stop, a water stop agent (silicon 503) is filled between the wires and adheres to the wire covering. For this reason, although the water stop performance is very excellent, the management of the water stop agent is difficult and it takes about several hours to solidify, so the workability is not good. Further, the water-stopping structure using the above-described butyl rubber 509 is filled with a water-stopping agent (butyl rubber 509) between the wires, the butyl rubber itself is soft and easy to adapt, and yet has adhesiveness. However, there is a problem that it is difficult to control the amount of butyl rubber used. Furthermore, the water-stopping structure using butyl rubber 509 is not easy to check, such as being sticky and sticky to the hand.

また、止水構造への応用が可能な技術として、電線束の外周を樹脂材料によってモールドするモールド構造が知られている（特許文献１等参照）。ところが、このようなモールド構造では、３本以上の電線を束にしてしまうと、隣接する電線間に樹脂を充填できない隙間（樹脂未充填空間）ができてしまう。また、これらのモールド構造は、通常の射出成形機によって成形が行われる。このため、設備が大掛かりとなる。また、射出成形機を使用した場合、成形型のキャビティに溶融樹脂を射出する際の溶融樹脂の漏出によるバリの発生を抑制する必要がある。このため、成形型には、バリきりが設けられる。バリきりは、成形型から引き出される電線の外周に密着させるため、山脈のように先端が尖った複数の突条を有する。その結果、電線群の成形型配置時に、電線の被覆に傷をつけてしまう可能性があり、慎重な取り扱いが必要となるため作業性がよくなかった。   Further, as a technique that can be applied to a water stop structure, a mold structure is known in which the outer periphery of a wire bundle is molded with a resin material (see Patent Document 1 and the like). However, in such a mold structure, if three or more wires are bundled, a gap (resin unfilled space) in which resin cannot be filled is formed between adjacent wires. Further, these mold structures are molded by a normal injection molding machine. For this reason, an installation becomes large. Further, when an injection molding machine is used, it is necessary to suppress the occurrence of burrs due to leakage of the molten resin when the molten resin is injected into the mold cavity. For this reason, the mold is provided with a burr. The burrs have a plurality of ridges with pointed tips like mountains, in order to adhere to the outer periphery of the wire drawn from the mold. As a result, there is a possibility that the coating of the electric wire may be damaged when the forming group of the electric wire group is arranged, and the workability is not good because careful handling is required.

本発明は上記状況に鑑みてなされたもので、その目的は、電線群挿通部から浸入する水入り量を容易に抑制できるワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法を提供することにある。   The present invention has been made in view of the above situation, and an object of the present invention is to provide a wire harness countermeasure structure and a wire harness manufacturing method capable of easily suppressing the amount of water entering from the wire group insertion portion. is there.

本発明に係る上記目的は、下記構成により達成される。
（１） 複数の電線が直径方向に並ぶ少なくとも一列の電線群と、前記電線群の延在方向の一部分を包囲し電線群挿通部の内周形状に応じた外周形状部を有するように低圧射出された硬質樹脂材によって一体にモールド成形された堰き止め部と、を備えることを特徴とするワイヤハーネスの水入り対策構造。 The above object of the present invention is achieved by the following configuration.
(1) Low pressure injection so that a plurality of electric wires are arranged in the diameter direction and at least one row of electric wire groups and an outer peripheral shape portion corresponding to the inner peripheral shape of the electric wire group insertion portion surrounding a part in the extending direction of the electric wire group. And a damming portion integrally molded by the hard resin material formed.

上記（１）の構成のワイヤハーネスの水入り対策構造によれば、一列の電線群の延在方向の一部分を包囲して堰き止め部が一体にモールド成形される。この堰き止め部の外周形状部は、電線群挿通部の内周形状に応じた所定形状に成形される。すなわち、堰き止め部は、電線群挿通部の開口形状に応じた自由な形状に形成される。
電線群は、複数の電線が直径方向に一列で並ぶので、３本以上の電線によって包囲された樹脂未充填空間が形成されることがなく、隣接する電線同士の間に充填できる。
堰き止め部は、通常の射出成形機と異なる低圧射出成形機によって低圧射出された硬質樹脂材によって一体にモールド成形される。低圧射出成形機によるモールド成形は、通常の射出成形機に比べ、溶融樹脂の射出圧力が低い。そこで、堰き止め部をモールド成形する際の電線への影響を抑制できる。また、溶融樹脂が漏れ出しにくいので、成形型のバリきりと隣接する電線間との間の小さな隙間は空けたままとすることができる。従って、成形型から引き出される電線の外周に密着させるための先端が尖った複数の突条をバリきりに設ける必要がなくなる。 According to the countermeasure against water entry of the wire harness having the configuration (1), the damming portion is integrally molded so as to surround a part in the extending direction of the row of electric wires. The outer periphery shape part of this damming part is shape | molded by the predetermined shape according to the inner periphery shape of an electric wire group insertion part. That is, the damming portion is formed in a free shape corresponding to the opening shape of the wire group insertion portion.
Since a plurality of electric wires are arranged in a line in the diameter direction, the electric wire group can be filled between adjacent electric wires without forming a resin unfilled space surrounded by three or more electric wires.
The damming portion is integrally molded by a hard resin material injected at a low pressure by a low pressure injection molding machine different from a normal injection molding machine. Mold molding by a low-pressure injection molding machine has a lower injection pressure of molten resin than a normal injection molding machine. Then, the influence on the electric wire at the time of molding a damming part can be suppressed. In addition, since the molten resin is difficult to leak out, a small gap between the burrs of the mold and the adjacent wires can be left open. Therefore, it is not necessary to provide a plurality of protrusions with sharp tips to be brought into close contact with the outer periphery of the electric wire drawn from the mold.

（２） 上記（１）の構成の水入り対策構造であって、前記電線群が、前記電線の並び方向に交差する方向に離間して複数の段数で配置されることを特徴とするワイヤハーネスの水入り対策構造。 (2) The water-filling countermeasure structure having the configuration of (1), wherein the wire group is arranged in a plurality of stages apart from each other in a direction intersecting the arrangement direction of the wires. Water-filling countermeasure structure.

上記（２）の構成のワイヤハーネスの水入り対策構造によれば、電線の数が、一列の電線群を構成する電線の数よりも多い場合であっても、樹脂未充填空間を生じさせることなく、止水性能の高い堰き止め部の成形が可能となる。   According to the countermeasure against water entry of the wire harness configured as described in (2) above, a resin-unfilled space is generated even when the number of electric wires is larger than the number of electric wires constituting one row of electric wire groups. Therefore, it is possible to form a damming portion having high water stopping performance.

（３） 上記（１）または（２）の構成のワイヤハーネスの水入り対策構造であって、前記堰き止め部には、前記電線群挿通部が設けられた隔壁部に係合する係合部が一体成形されることを特徴とするワイヤハーネスの水入り対策構造。 (3) The wire harness water-repellent structure for the wire harness configured as described in (1) or (2) above, wherein the damming portion engages with a partition wall portion provided with the wire group insertion portion. Is a water harness countermeasure structure for wire harnesses, which is integrally molded.

上記（３）の構成のワイヤハーネスの水入り対策構造によれば、堰き止め部に、電線群挿通部が設けられた隔壁部（止水ボックスのケースやグロメットなど）と係合する係合部が硬質樹脂材によって一体にモールド成形されることで、堰き止め部を電線群挿通部に直接固定することができる。なお、係合部は、隔壁部に応じた取付け形状や位置決め形状を備えた構成とすることができる。また、係合部には、ナットやボルトなどを一緒にインサート成形することも可能である。   According to the countermeasure against water entry of the wire harness having the configuration of (3) above, the engaging portion that engages with the partition wall portion (such as a case of a water stop box or a grommet) provided with the wire group insertion portion at the damming portion. Is integrally molded with the hard resin material, so that the damming portion can be directly fixed to the wire group insertion portion. In addition, the engaging part can be set as the structure provided with the attachment shape and positioning shape according to a partition part. Moreover, it is also possible to insert-mold together a nut, a volt | bolt, etc. to an engaging part.

（４） 上記（１）または（２）の構成のワイヤハーネスの水入り対策構造であって、複数の前記堰き止め部には、互いに相手方の前記堰き止め部と合体するための係合部が一体成形されることを特徴とするワイヤハーネスの水入り対策構造。 (4) In the wire harness countermeasure structure for a wire harness configured as described in (1) or (2) above, the plurality of damming portions include engaging portions for uniting with the other damming portion. Water harness countermeasure structure for wire harness, which is integrally molded.

上記（４）の構成のワイヤハーネスの水入り対策構造によれば、複数の堰き止め部に、互いに相手方の堰き止め部と合体するための係合部が硬質樹脂材によって一体にモールド成形されることで、複数の堰き止め部を互いに直接組合わせることができる。そこで、電線の数が、一列の電線群を構成する電線の数よりも多い場合であっても、樹脂未充填空間を生じさせることなく、水入り対策性能の高い堰き止め部を構成することが可能となる。なお、係合部は、互いに圧入嵌合する嵌合部やロック機構を備えた構成とすることができる。   According to the countermeasure against water entry of the wire harness having the configuration of the above (4), the engaging portions for uniting with the other damming portion are integrally molded with the hard damming material on the plurality of damming portions. Thus, the plurality of damming portions can be directly combined with each other. Therefore, even when the number of electric wires is larger than the number of electric wires constituting one row of electric wire groups, it is possible to constitute a damming portion having a high anti-water filling performance without causing a resin unfilled space. It becomes possible. In addition, the engaging part can be set as the structure provided with the fitting part and the locking mechanism which carry out press fitting with each other.

（５） 上記（１）〜（４）の何れか１つに記載のワイヤハーネスの水入り対策構造であって、前記堰き止め部における前記電線群の延在方向に沿った一対の側面を貫通して各側面からそれぞれ突出する前記電線の各突出部は、中心軸線がずれて配置されていることを特徴とするワイヤハーネスの水入り対策構造。 (5) The wire harness water-proof structure according to any one of (1) to (4), wherein a pair of side surfaces along the extending direction of the wire group in the damming portion are penetrated. And each protrusion part of the said electric wire which each protrudes from each side surface is arrange | positioned so that the center axis line may shift | deviate, The water-filling countermeasure structure of the wire harness characterized by the above-mentioned.

上記（５）の構成のワイヤハーネスの水入り対策構造によれば、堰き止め部に埋設された電線は真っ直ぐになることはなく、ある程度自由に曲りくねることで摩擦力が増え、電線が一直線に埋設されたものに比べて電線の引抜き荷重に対する堰き止め部の保持力が高まる。そこで、堰き止め部は、電線の被覆との接着性がある材料を選定しなくとも、電線の引抜き荷重に対する保持力を向上させることができる。   According to the countermeasure against water entry of the wire harness configured as described in (5) above, the electric wire embedded in the damming portion does not become straight, and the frictional force increases by bending freely to some extent, so that the electric wire is in a straight line. The holding power of the damming portion against the drawing load of the electric wire is higher than that of the buried one. Therefore, the damming portion can improve the holding force against the drawing load of the electric wire without selecting a material having adhesiveness with the coating of the electric wire.

（６） 複数の電線が直径方向に並ぶ少なくとも一列の電線群と、前記電線群の延在方向の一部分を包囲し電線群挿通部の内周形状に応じた外周形状部を有する硬質樹脂材製の堰き止め部と、を備えるワイヤハーネスの製造方法であって、前記堰き止め部をモールド成形するためのキャビティと、前記一列の電線群の延在方向に沿った前記キャビティの外側両端部分において前記一列の電線群の外周を挟む平坦なバリきりとを有するハーネス収容部が分割面にそれぞれ形成された上型及び下型を、前記ハーネス収容部に前記一列の電線群の一部分を配置して型締めする型締め工程と、溶融した硬質樹脂材を前記キャビティ内に低圧射出する射出工程と、を含むことを特徴とするワイヤハーネスの製造方法。 (6) Made of a hard resin material that surrounds at least one row of electric wires in which a plurality of electric wires are arranged in the diametrical direction, and an outer peripheral shape portion that surrounds a part of the extending direction of the electric wire group and corresponds to the inner peripheral shape of the electric wire group insertion portion A damming portion, a cavity for molding the damming portion, and at both end portions outside the cavity along the extending direction of the row of electric wires. An upper mold and a lower mold, each having a harness accommodating portion having a flat burr hole sandwiching the outer periphery of a row of electric wire groups, are formed on the dividing surface, and a portion of the electric wire group is arranged in the harness accommodating portion. A method of manufacturing a wire harness, comprising: a mold clamping step of clamping, and an injection step of low-pressure injection of a molten hard resin material into the cavity.

上記（６）の構成のワイヤハーネスの製造方法によれば、ハーネス収容部に一列の電線群が配置され、この電線群の延在方向に沿ったキャビティの外側両端部分に形成された平坦なバリきりで一列の電線群を平行に挟むように合わせられた上型と下型が型締めされると、堰き止め部をモールド成形するための成形空間が上型と下型の間に画成される。そして、平坦なバリきりと隣接する電線間との間の隙間は空けたままとしてキャビティ内に溶融樹脂が低圧射出される。この際、キャビティ内に入った溶融樹脂は、圧入時の圧力が低く、漏出しにくいので、平坦なバリきりと隣接する電線間との間の隙間からの漏出が防止され、バリが抑えられる。
このため、電線の外周に密着させるための先端が尖った複数の突条を有するバリきりを上型及び下型に設ける必要がない。そこで、電線群をハーネス収容部に配置する時に、電線の被覆に傷をつけてしまうおそれがなくなり、慎重な取り扱いが不要となるため、ワイヤハーネスの水入り対策構造を構成する堰き止め部をモールド成形する際の作業性が向上する。 According to the method of manufacturing the wire harness having the configuration of (6) above, the flat burrs formed at the outer end portions of the cavity along the extending direction of the electric wire group are arranged in a row of the electric wire group in the harness accommodating portion. When the upper mold and the lower mold, which are aligned so as to sandwich a row of electric wires in parallel, are clamped, a molding space for molding the damming portion is defined between the upper mold and the lower mold. The The molten resin is injected into the cavity at a low pressure while leaving a gap between the flat burrs and the adjacent wires. At this time, since the molten resin that has entered the cavity has a low pressure during press-fitting and is difficult to leak out, leakage from the gap between the flat burrs and the adjacent electric wires is prevented, and burrs are suppressed.
For this reason, it is not necessary to provide the upper mold | type and the lower mold | type with the burr | borrow which has several protrusions with the pointed tip for making it adhere to the outer periphery of an electric wire. Therefore, when arranging the wire group in the harness housing part, there is no risk of damaging the sheath of the wire, and careful handling becomes unnecessary, so the damming part that constitutes the water harness countermeasure structure for the wire harness is molded. Workability at the time of molding is improved.

（７） 上記（６）に記載のワイヤハーネスの製造方法であって、前記下型における前記バリきりが、前記一列の電線群を収容可能な凹状部を有すると共に、前記上型における前記バリきりが、前記凹状部に対向する平板状部を有し、前記型締め工程において前記凹状部に収容された前記一列の電線群が、前記平板状部によって挟持方向に押圧付勢されることを特徴とするワイヤハーネスの製造方法。 (7) The wire harness manufacturing method according to (6), wherein the burrs in the lower mold have concave portions that can accommodate the row of electric wires, and the burrs in the upper mold. However, it has a flat plate-like portion opposed to the concave portion, and the row of electric wires accommodated in the concave portion in the mold clamping step is pressed and urged in the clamping direction by the flat plate portion. A method for manufacturing a wire harness.

上記（７）の構成のワイヤハーネスの製造方法によれば、下型におけるバリきりの凹状部内に一列の電線群を収容した状態で上型と下型を型締めすることができる。そこで、電線群はハーネス収容部に配置し易く、型締め時の電線噛み込みが生じにくくなるので、ワイヤハーネスの水入り対策構造を構成する堰き止め部をモールド成形する際の作業性が更に向上する。   According to the method for manufacturing the wire harness having the configuration (7), the upper mold and the lower mold can be clamped in a state where the row of electric wire groups is accommodated in the burrs in the lower mold. Therefore, the wire group is easy to place in the harness housing part, and it becomes difficult for the wire to be caught when the mold is clamped, so the workability when molding the damming part that constitutes the water harness countermeasure structure is further improved. To do.

本発明に係るワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法によれば、電線群挿通部から浸入する水入り量を容易に抑制できる。   According to the wire harness countermeasure structure and the wire harness manufacturing method according to the present invention, the amount of water entering from the wire group insertion portion can be easily suppressed.

以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための形態（以下、「実施形態」という。）を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。   The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

本発明の一実施形態に係るワイヤハーネスの水入り対策構造を表し、（ａ）は１段の電線群に堰き止め部が設けられた斜視図、（ｂ）は２段の電線群に堰き止め部が設けられた斜視図である。1 illustrates a water harness countermeasure structure for a wire harness according to an embodiment of the present invention, in which (a) is a perspective view in which a damming portion is provided in a first stage electric wire group, and (b) is a damming action in a two stage electric wire group. It is the perspective view in which the part was provided. （ａ）は１段の電線群が設けられた堰き止め部の横断面図、（ｂ）は２段の電線群が設けられた堰き止め部の横断面図である。(A) is a cross-sectional view of a damming portion provided with a one-stage electric wire group, and (b) is a cross-sectional view of a damming portion provided with a two-stage electric wire group. 図１におけるＡ部の拡大図である。It is an enlarged view of the A section in FIG. 図１の（ａ）に示した水入り対策構造を備えたワイヤハーネスを用いた機器接続構造を表す要部分解斜視図である。It is a principal part disassembled perspective view showing the apparatus connection structure using the wire harness provided with the water countermeasure structure shown to (a) of FIG. 図１の（ｂ）に示した水入り対策構造を備えたワイヤハーネスを用いた機器接続構造を表す要部分解斜視図である。It is a principal part disassembled perspective view showing the apparatus connection structure using the wire harness provided with the water countermeasure structure shown in FIG.1 (b). 低圧射出成形機の斜視図である。It is a perspective view of a low-pressure injection molding machine. （ａ）は一列の電線群が樹脂に覆われた状態を説明するための概略断面図、（ｂ）は３本以上の電線を束ねた電線群が樹脂に覆われた状態を説明するための概略断面図である。(A) is schematic sectional drawing for demonstrating the state where the electric wire group of 1 row was covered with resin, (b) is for demonstrating the state where the electric wire group which bundled three or more electric wires was covered with resin. It is a schematic sectional drawing. （ａ）は平坦なバリきりを備えた成形型の正面図、（ｂ）は変形例に係る平坦なバリきりを備えた成形型の正面図、（ｃ）は他の変形例に係る平坦なバリきりを備えた成形型の正面図である。(A) is a front view of a mold having a flat burr cut, (b) is a front view of a mold having a flat burr cut according to a modification, and (c) is a flat view according to another modification. It is a front view of the shaping | molding die provided with the burr cut. 先端が尖った複数の突条を有する比較例に係るバリきりを備えた成形型の正面図である。It is a front view of the shaping | molding die provided with the burr | flash which concerns on the comparative example which has several protrusions with the pointed tip. 隔壁部に係合する係合部が一体成形された堰き止め部の横断面図である。It is a cross-sectional view of the damming part in which the engaging part engaged with a partition part was integrally molded. （ａ）は互いに合体するための係合部が一体成形された一対の堰き止め部の一例を示す分解斜視図、（ｂ）は他の例を示す分解斜視図である。(A) is a disassembled perspective view which shows an example of a pair of damming parts by which the engaging part for uniting together was integrally molded, (b) is an exploded perspective view which shows another example. 本発明の他の実施形態に係るワイヤハーネスの水入り対策構造を表し、（ａ）は要部斜視図、（ｂ）は正面図である。The water-filling countermeasure structure of the wire harness which concerns on other embodiment of this invention is represented, (a) is a principal part perspective view, (b) is a front view. 本発明の他の実施形態に係るワイヤハーネスの水入り対策構造の変形例を表す平面図である。It is a top view showing the modification of the water-filling countermeasure structure of the wire harness which concerns on other embodiment of this invention. 本発明の参考例に係るワイヤハーネスを表す要部斜視図である。It is a principal part perspective view showing the wire harness which concerns on the reference example of this invention. （ａ）は従来の１液止水による止水構造の横断面図、（ｂ）はブチルゴムによる止水構造の横断面図である。(A) is a cross-sectional view of a conventional water-stop structure with one liquid water-stop, and (b) is a cross-sectional view of a water-stop structure with butyl rubber.

以下、本発明に係る実施形態を図面を参照して説明する。
図１の（ａ）に示すように、本発明の一実施形態に係るワイヤハーネスの水入り対策構造は、水平方向に併設された複数の電線１５からなる電線群１１と、硬質樹脂製の堰き止め部１３と、を主要な構成として備える。
電線群１１は、複数の電線１５が、直径方向に一列に並んでいる。それぞれの電線１５は、導体の外周が絶縁性樹脂によって被覆されている。本発明に係る電線群１１は、複数の電線１５が直径方向に少なくとも一列に並んで設けられる。「少なくとも一列」とは、複数列が多段状に配置されてもよい意味である。但し、この場合には、後述するように、各段の電線群同士は、離間して配置される。 Embodiments according to the present invention will be described below with reference to the drawings.
As shown to (a) of FIG. 1, the water-filling countermeasure structure of the wire harness which concerns on one Embodiment of this invention has the electric wire group 11 which consists of the some electric wire 15 provided along with the horizontal direction, and the dam made from hard resin. The stop part 13 is provided as a main structure.
The electric wire group 11 has a plurality of electric wires 15 arranged in a line in the diameter direction. As for each electric wire 15, the outer periphery of a conductor is coat | covered with insulating resin. The electric wire group 11 according to the present invention is provided with a plurality of electric wires 15 arranged in at least one line in the diameter direction. “At least one row” means that a plurality of rows may be arranged in multiple stages. However, in this case, as will be described later, the electric wire groups at each stage are arranged apart from each other.

堰き止め部１３は、電線群１１の延在方向の一部分を包囲するように一体にモールド成形される。この堰き止め部１３は、後述する電線群挿通部１９の内周形状に応じた外周形状部１７と、電線群１１の延在方向に沿った一対の側面１３ａ，１３ｂとを有するように一体にモールド成形される。このモールド成形には、後述の低圧射出成形機が使用される。低圧射出成形機では、硬質樹脂材である例えば一般のエンプラ（エンジニアリングプラスチック）が使用される。本発明のワイヤハーネスの水入り対策構造は、換言すれば、このエンプラに、電線群１１がインサート成形されたものとなっている。   The damming portion 13 is integrally molded so as to surround a part of the wire group 11 in the extending direction. The damming portion 13 is integrally formed so as to have an outer peripheral shape portion 17 corresponding to an inner peripheral shape of an electric wire group insertion portion 19 described later and a pair of side surfaces 13a and 13b along the extending direction of the electric wire group 11. Molded. A low-pressure injection molding machine, which will be described later, is used for this molding. In a low-pressure injection molding machine, for example, general engineering plastics (engineering plastics) that are hard resin materials are used. In other words, the wire harness countermeasure structure for a wire harness of the present invention is such that the wire group 11 is insert-molded in this engineering plastic.

本実施形態に係るワイヤハーネスの水入り対策構造は、図１の（ｂ）に示すように、電線群１１が、電線１５の並び方向に交差する方向（図１の上下方向）に離間して複数の段数で配置されてもよい。図示例では２段を例示しているが、電線群１１は、３段以上の複数段であってもよい。それぞれの電線群１１を離間させる理由は、３本以上の電線１５によって包囲される後述の樹脂未充填空間７０を生じさせないためである。   As shown in FIG. 1B, the wire harness countermeasure structure for a wire harness according to the present embodiment is separated in a direction (vertical direction in FIG. 1) in which the electric wire group 11 intersects the arrangement direction of the electric wires 15. A plurality of stages may be arranged. In the illustrated example, two stages are illustrated, but the electric wire group 11 may be a plurality of stages of three or more stages. The reason why the electric wire groups 11 are separated from each other is to prevent a resin unfilled space 70 described later from being surrounded by three or more electric wires 15.

堰き止め部１３の外周形状部１７は、例えば図示例の断面台形状に成形することができる。なお、堰き止め部１３の外周形状部１７は、これには限定されない。電線群１１が１段の場合、堰き止め部１３は、図２の（ａ）に示すような、扁平な台形状で成形される。多段の場合、堰き止め部１３は、図２（ｂ）に示すような、高さの高い台形状で成形される。各列の隣接する電線１５同士は、僅かに離間していても接触していてもよい。僅かに離間していれば、その間に樹脂が入り込み電線１５の外周が包囲されて水入り対策され、接触していればそれによって水入り対策が可能となるためである。   The outer peripheral shape portion 17 of the damming portion 13 can be formed, for example, in a trapezoidal cross section as shown in the drawing. The outer peripheral shape portion 17 of the damming portion 13 is not limited to this. When the electric wire group 11 has one stage, the damming portion 13 is formed in a flat trapezoidal shape as shown in FIG. In the case of multiple stages, the damming portion 13 is formed in a trapezoidal shape having a high height as shown in FIG. The adjacent electric wires 15 in each row may be slightly separated or in contact with each other. If it is slightly separated, the resin enters between them and the outer periphery of the electric wire 15 is surrounded to take measures against water entry. If they are in contact with each other, it is possible to take measures against water entry.

図４に示すように、堰き止め部１３を介して電線群１１が貫通される電線群挿通部１９は、例えば止水ボックス１００の一体ケース（隔壁部）２１に設けられる。電線群挿通部１９は、正面視で台形状の貫通穴２３を有する筒状に形成される。堰き止め部１３の外周形状部１７は、この電線群挿通部１９の内周形状に応じた形状を有するように成形されている。この場合、堰き止め部１３は、電線群１１の一端側が貫通穴２３に挿通された後、貫通穴２３に嵌め入れられる。この場合、堰き止め部１３は、挿入方向の任意位置の断面形状が、同一に形成される。なお、貫通穴２３の内周面には、シールスポンジやゴムなどの止水材が貼り付けられ、堰き止め部１３の外周形状部１７との間が止水されていてもよい。   As shown in FIG. 4, the wire group insertion portion 19 through which the wire group 11 passes through the damming portion 13 is provided, for example, in an integrated case (partition wall portion) 21 of the water stop box 100. The electric wire group insertion part 19 is formed in the cylinder shape which has the trapezoidal through-hole 23 by front view. The outer peripheral shape portion 17 of the damming portion 13 is formed to have a shape corresponding to the inner peripheral shape of the electric wire group insertion portion 19. In this case, the damming portion 13 is fitted into the through hole 23 after one end side of the wire group 11 is inserted into the through hole 23. In this case, the damming portion 13 has the same cross-sectional shape at an arbitrary position in the insertion direction. Note that a water-stopping material such as a seal sponge or rubber may be attached to the inner peripheral surface of the through hole 23, and the space between the outer peripheral shape portion 17 of the damming portion 13 may be stopped.

また、堰き止め部１３は、挿入方向に先細のテーパー面で外周形状部１７が形成されてもよい。これにより、堰き止め部１３は、電線群挿通部１９への挿入圧力によって、より貫通穴２３の内周面に密接させることができ、高い止水性を得ることができるようになる。   Further, the damming portion 13 may be formed with the outer peripheral shape portion 17 with a tapered surface tapered in the insertion direction. Thereby, the damming portion 13 can be brought into closer contact with the inner peripheral surface of the through hole 23 by the insertion pressure to the wire group insertion portion 19, and high water-stopping performance can be obtained.

また、電線群挿通部１９は、図５に示すように、止水ボックス１００Ａの上下ケース（隔壁部）２１ａ，２１ｂに設けられる分割構造であってもよい。すなわち、電線群挿通部１９は、下ケース２１ｂに形成された底板部２５と、上ケース２１ａに形成された山形鍔部２７と、が合わせられることで、台形状の貫通穴２３が画成される筒状に形成されてもよい。この場合、堰き止め部１３は、底板部２５に載置された後、山形鍔部２７が被せられることで、底板部２５と山形鍔部２７とによって挟持されて固定される。この堰き止め部１３に対する挟持は、分割された上下ケース２１ａ，２１ｂ同士の締結具（図示略）による固定、或いは底板部２５と山形鍔部２７との締結具による固定によってなされる。   Moreover, as shown in FIG. 5, the electric wire group insertion part 19 may be a divided structure provided in the upper and lower cases (partition walls) 21a and 21b of the water stop box 100A. That is, the electric wire group insertion part 19 is formed with the trapezoidal through-hole 23 by combining the bottom plate part 25 formed in the lower case 21b and the mountain-shaped collar part 27 formed in the upper case 21a. It may be formed in a cylindrical shape. In this case, after the damming portion 13 is placed on the bottom plate portion 25, the ridge portion 27 is put on the bottom plate portion 25, so that the damming portion 13 is sandwiched and fixed between the bottom plate portion 25 and the mountain shape collar portion 27. The damming portion 13 is clamped by fixing the divided upper and lower cases 21a and 21b with a fastener (not shown) or fixing the bottom plate portion 25 and the angle hook portion 27 with a fastener.

図４に示すように、止水ボックス１００の一体ケース２１には、例えば図示しない電子機器が収容される。電線群１１の一端に接続されたコネクタ２９は、この電子機器と接続されている。コネクタ２９は、一体ケース２１に収容され、一体ケース２１の電線群挿通部１９から導出された電線群１１が、堰き止め部１３によって水入り対策される。これにより、コネクタ２９は、水入り対策されたケース内に収容される。   As shown in FIG. 4, for example, an electronic device (not shown) is accommodated in the integrated case 21 of the water stop box 100. A connector 29 connected to one end of the wire group 11 is connected to this electronic device. The connector 29 is housed in the integrated case 21, and the wire group 11 led out from the wire group insertion part 19 of the integrated case 21 is prevented from entering the water by the damming unit 13. Thereby, the connector 29 is accommodated in the case in which water entry measures are taken.

また、図５に示すように、止水ボックス１００Ａの上下ケース２１ａ，２１ｂに収容された図示しない電子機器に対して、例えば２つの電線群１１のコネクタ２９が接続される場合には、それぞれの電線群１１が上下２段に離間して重なった状態で堰き止め部１３により水入り対策される。このように、接続される電線群１１の数が増えるごとに、堰き止め部１３には多段状に電線群１１が配置される。これにより、止水ボックス１００Ａの電線群挿通部１９において、堰き止め部１３による一括した水入り対策が行われる。   In addition, as shown in FIG. 5, for example, when the connectors 29 of the two wire groups 11 are connected to electronic devices (not shown) accommodated in the upper and lower cases 21 a and 21 b of the water stop box 100 </ b> A, In the state where the electric wire group 11 is separated and overlapped in two upper and lower stages, the damming portion 13 takes measures against entering water. In this way, each time the number of connected wire groups 11 is increased, the wire groups 11 are arranged in multiple stages in the damming portion 13. Thereby, in the electric wire group insertion part 19 of the water stop box 100A, the countermeasure against water entering by the dam part 13 is performed.

このように、本実施形態に係るワイヤハーネスの水入り対策構造を備えた止水ボックス１００（１００Ａ）は、電線群１１が導出される電線群挿通部１９を介してケース外部から止水ボックス内へ浸入する水入り量を抑制することができる。   Thus, the water stop box 100 (100A) provided with the water harness countermeasure structure for a wire harness according to the present embodiment is provided inside the water stop box from the outside of the case via the wire group insertion portion 19 through which the wire group 11 is led. The amount of water entering the water can be suppressed.

図６は低圧射出成形機の斜視図である。
電線群１１に堰き止め部１３を一体にモールド成形するための低圧射出成形機３１は、電動機等の外部動力なしに作業員一人でも操作可能な成形機であって、成形型３３と、図示しない型締め装置と、成形型３３に溶融樹脂を加圧注入する低圧射出装置３５と、から構成されている。 FIG. 6 is a perspective view of a low pressure injection molding machine.
The low-pressure injection molding machine 31 for molding the damming unit 13 integrally with the wire group 11 is a molding machine that can be operated by one worker without external power such as an electric motor, and is not shown with a molding die 33. It comprises a mold clamping device and a low pressure injection device 35 for injecting molten resin into the mold 33 under pressure.

低圧射出装置３５は、合成樹脂等を加熱して溶融するヒータが設けられた加熱筒３７と、加熱筒内の溶融樹脂を図示しないノズルから射出するプランジャ３９と、プランジャ３９を前進させる射出シリンダ４１と、射出シリンダ４１を駆動するハンドル４３と、加熱筒３７の加熱温度を所望の温度に保持する温調器４５と、を有し、これらが台座４７に立設する装置支柱４９に支持されている。   The low pressure injection device 35 includes a heating cylinder 37 provided with a heater for heating and melting synthetic resin and the like, a plunger 39 for injecting molten resin in the heating cylinder from a nozzle (not shown), and an injection cylinder 41 for moving the plunger 39 forward. And a handle 43 for driving the injection cylinder 41 and a temperature controller 45 for maintaining the heating temperature of the heating cylinder 37 at a desired temperature, and these are supported by a device column 49 standing on a pedestal 47. Yes.

なお、本実施形態における低圧射出成形機３１とは、１回の射出成形で成形できる樹脂の量が最大で１０ｇ程度のものであって、且つ、成形型３３の型締め時に、エアシリンダ又はリンク等を用いて手動でも行うことができるものをいう。勿論、低圧射出装置３５は、電動機やエア等の外部動力によって射出シリンダ４１を駆動するものであってもよい。より具体的には、低圧射出成形機３１としては、例えば、特開２０１０−２６０２９７号公報、特開２０１２−３０４２９号公報及び特開２０１３−１０３４９２号公報などに開示された公知の「射出成形装置」を用いることができる。   Note that the low-pressure injection molding machine 31 in the present embodiment has a maximum amount of resin that can be molded by one injection molding of about 10 g, and an air cylinder or a link when the mold 33 is clamped. It can be performed manually using the above. Of course, the low pressure injection device 35 may drive the injection cylinder 41 by external power such as an electric motor or air. More specifically, as the low-pressure injection molding machine 31, for example, the well-known “injection molding apparatus” disclosed in JP2010-260297A, JP2012-30429A, JP2013-103492A, and the like. Can be used.

本実施形態に係る成形型３３は、台座４７に配置される。成形型３３は、上型５１と下型５３とが、電線群１１の延在方向に沿った外側両端部分に形成されたバリきり５５（図６及び図８の（ａ）参照）に電線群１１を収容するように挟んで合わせられることで、堰き止め部１３を成形可能な空洞となる成形空間が画成される（型締め工程）。
即ち、上型５１及び下型５３には、堰き止め部１３をモールド成形するためのキャビティ５７と、一列の電線群１１の延在方向（図６における左右方向）に沿ったキャビティ５７の外側両端部分において一列の電線群１１の外周を挟む平坦なバリきり５５とを有するハーネス収容部５６ａ，５６ｂが、上型分割面（分割面）５１ａ及び下型分割面（分割面）５３ａにそれぞれ形成されている。下型５３におけるバリきり５５は、一列の電線群１１を収容可能な凹状部を有し、下型分割面５３ａからの深さが電線１５の直径と略同じとされている。一方、上型５１におけるバリきり５５は、上型分割面５１ａと同じ面上に平板状に形成されている。
そこで、下型５３におけるバリきり５５の凹状部内に一列の電線群１１を収容した状態で上型５１と下型５３を型締めすることができ、電線群１１がハーネス収容部５６ｂに配置し易くなり、型締め時の電線噛み込みが生じにくくなる。
そして、このキャビティ５７にゲート５２（図８参照）を介して供給路から溶融樹脂を供給することで、堰き止め部１３が電線群１１の外周にモールド成形される。 The mold 33 according to this embodiment is disposed on the pedestal 47. In the molding die 33, the upper die 51 and the lower die 53 are arranged on the burr hole 55 (see FIGS. 6 and 8 (a)) formed on both end portions along the extending direction of the wire group 11. 11 is formed so as to accommodate 11 so as to form a molding space that becomes a cavity capable of molding the damming portion 13 (a mold clamping step).
That is, the upper die 51 and the lower die 53 are provided with a cavity 57 for molding the damming portion 13 and both outer ends of the cavity 57 along the extending direction of the electric wire group 11 in one row (the horizontal direction in FIG. 6). Harness accommodating portions 56a and 56b having flat burrs 55 sandwiching the outer periphery of the row of electric wire groups 11 in the portion are respectively formed on the upper mold dividing surface (dividing surface) 51a and the lower mold dividing surface (dividing surface) 53a. ing. The burrs 55 in the lower mold 53 have concave portions that can accommodate a row of electric wire groups 11, and the depth from the lower mold dividing surface 53 a is substantially the same as the diameter of the electric wires 15. On the other hand, the burrs 55 in the upper mold 51 are formed in a flat plate shape on the same surface as the upper mold dividing surface 51a.
Therefore, the upper mold 51 and the lower mold 53 can be clamped in a state where the row of the wire group 11 is housed in the concave portion of the burr hole 55 in the lower mold 53, and the wire group 11 can be easily placed in the harness housing portion 56b. Therefore, it becomes difficult for the electric wire to be caught when the mold is clamped.
Then, the molten resin is supplied to the cavity 57 from the supply path via the gate 52 (see FIG. 8), whereby the damming portion 13 is molded on the outer periphery of the wire group 11.

低圧射出成形機３１を使用した成形では、上型５１と下型５３のバリきり５５に電線群１１が挟まれた状態で成形型３３のキャビティ５７に溶融樹脂が低圧射出されると、所定量の溶融樹脂（堰き止め部１３を成形するための熱可塑性樹脂の樹脂量）がキャビティ５７に入る（射出工程）。   In molding using the low pressure injection molding machine 31, when the molten resin is injected at a low pressure into the cavity 57 of the molding die 33 with the wire group 11 sandwiched between the burrs 55 of the upper die 51 and the lower die 53, a predetermined amount is obtained. Molten resin (the amount of thermoplastic resin for molding the damming portion 13) enters the cavity 57 (injection step).

キャビティ５７に注入された溶融樹脂は、注入先端ほど温度が低くなり、硬化が促進されると共に、バリきり５５の近傍の型温度は熱可塑性樹脂の樹脂溶融温度以下である。そして、注入先端で硬化した溶融樹脂は、それ自体が封止機能を有する。溶融樹脂は、低圧射出装置３５によってキャビティ５７に低圧射出されるため、流動性は有するものの、平坦なバリきり５５と隣接する電線１５間との間の小さな隙間を通って多量に漏れ出す程の流動性は抑制されている。   The temperature of the molten resin injected into the cavity 57 becomes lower at the injection tip, curing is accelerated, and the mold temperature near the burrs 55 is equal to or lower than the resin melting temperature of the thermoplastic resin. The molten resin cured at the injection tip itself has a sealing function. Since the molten resin is injected into the cavity 57 by the low pressure by the low pressure injection device 35, the molten resin has fluidity but leaks in a large amount through a small gap between the flat burrs 55 and the adjacent electric wires 15. The fluidity is suppressed.

その結果、バリきり５５と隣接する電線１５間との間の隙間から溶融樹脂が多量に漏れ出すことはなく、従来の成形型のように成形樹脂を封止するための構造や部材をバリきり５５に設ける必要がない。
そこで、成形型３３は単純な構造となり、製造コストを低減することができる。また、上型５１と下型５３のバリきり５５に挟持される電線群１１の幅方向位置が多少変化しても、バリきり５５と電線群１１との隙間が固化した溶融樹脂によって封止されるので、電線群１１の位置変化にも柔軟に対応できる。 As a result, a large amount of molten resin does not leak from the gap between the burr hole 55 and the adjacent electric wire 15, and the structure and members for sealing the molding resin as in the conventional mold are burred. It is not necessary to provide in 55.
Therefore, the mold 33 has a simple structure, and the manufacturing cost can be reduced. Further, even if the position in the width direction of the wire group 11 held between the burrs 55 of the upper mold 51 and the lower mold 53 is slightly changed, the gap between the burrs 55 and the cable groups 11 is sealed with a solidified molten resin. Therefore, it is possible to flexibly cope with a change in position of the wire group 11.

更に、成形型３３におけるバリきり５５の近傍には、キャビティ５７に注入された溶融樹脂の注入先端を冷却する冷却機構（図示略）が設けられてもよい。冷却機構は、例えばバリきり５５に対応する成形型３３の外側に設けられる。冷却機構の例としては、冷却フィンや冷風送風機による空冷式、冷却水配管を設けることによる水冷式、ペルチェ素子を用いた電子冷却等を挙げることができる。冷却機構により溶融樹脂の注入先端の温度を常温よりも迅速に低温とし、溶融樹脂の硬化を局所的に促進させることが可能となる。
なお、本実施形態では、成形型３３が水平割型のものについて説明したが、成形型３３は垂直割型であってもよい。 Further, a cooling mechanism (not shown) for cooling the injection tip of the molten resin injected into the cavity 57 may be provided in the vicinity of the burrs 55 in the mold 33. The cooling mechanism is provided outside the molding die 33 corresponding to the burr hole 55, for example. Examples of the cooling mechanism include an air cooling method using a cooling fin or a cold air blower, a water cooling method using a cooling water pipe, and electronic cooling using a Peltier element. The temperature of the molten resin injection tip can be lowered to a temperature lower than room temperature quickly by the cooling mechanism, and the hardening of the molten resin can be locally promoted.
In the present embodiment, the mold 33 is a horizontal split mold, but the mold 33 may be a vertical split mold.

次に、上記した構成の作用を説明する。
本実施形態に係るワイヤハーネスの水入り対策構造では、一列又は二列の電線群１１の延在方向の一部分を包囲して堰き止め部１３が一体にモールド成形される。 Next, the operation of the above configuration will be described.
In the countermeasure against water entry of the wire harness according to the present embodiment, the damming portion 13 is integrally molded so as to surround a part in the extending direction of one or two rows of electric wire groups 11.

図７の（ａ）に示すように、堰き止め部１３の外周形状部１７は、電線群挿通部１９の内周形状に応じた所定形状（本実施形態では断面台形状）に成形される。すなわち、堰き止め部１３は、電線群挿通部１９の開口形状に応じた自由な形状に形成される。   As shown to (a) of FIG. 7, the outer peripheral shape part 17 of the damming part 13 is shape | molded by the predetermined shape (this embodiment cross-sectional trapezoid shape) according to the inner peripheral shape of the electric wire group penetration part 19. As shown in FIG. That is, the damming portion 13 is formed in a free shape corresponding to the opening shape of the wire group insertion portion 19.

電線群１１は、複数の電線１５が直径方向に一列で並ぶので、図７の（ｂ）に示すように、３本以上の電線１５によって包囲された樹脂未充填空間７０が形成されることがなく、隣接する電線１５同士の間を確実に水入り対策できる。   In the electric wire group 11, since a plurality of electric wires 15 are arranged in a line in the diameter direction, a resin unfilled space 70 surrounded by three or more electric wires 15 is formed as shown in FIG. In addition, it is possible to reliably prevent water entering between the adjacent electric wires 15.

本実施形態のワイヤハーネスの水入り対策構造では、堰き止め部１３を成形する硬質樹脂材として電線被覆と接着性のある材料を選定することによって、完全止水に近い状態を作ることができる。電線１５同士が接する部分は、どうしても存在するが、ごくわずかであり、密着しているため、水入り対策性能は高い。但し、堰き止め部１３の用途から考えて、安価で、成形しやすい材料を選定するのが適当であり、完全止水には至らなくてもよい。   In the water harness countermeasure structure for a wire harness according to this embodiment, a state close to complete water stop can be created by selecting a material that has adhesiveness to the wire covering as the hard resin material for molding the damming portion 13. The part where the electric wires 15 are in contact with each other is inevitably present, but is very small and is in close contact with each other. However, considering the use of the damming portion 13, it is appropriate to select a material that is inexpensive and easy to mold, and does not need to achieve complete water stopping.

堰き止め部１３は、エンプラ等の硬質樹脂材からなり、剛性を有するので、電線群挿通部１９が設けられた隔壁部である一体ケース２１や上下ケース２１ａ，２１ｂに所定の強度で固定することが可能となる。なお、堰き止め部１３と電線群挿通部１９との間の水入り対策は、電線群挿通部１９の内周面にシールスポンジやゴムなどの止水材を貼り付けることで行うことができる。   The damming portion 13 is made of a hard resin material such as engineering plastic and has rigidity. Therefore, the damming portion 13 is fixed to the integrated case 21 and the upper and lower cases 21a and 21b, which are partition walls provided with the wire group insertion portion 19, with a predetermined strength. Is possible. In addition, the countermeasure against water entering between the damming portion 13 and the wire group insertion portion 19 can be performed by sticking a waterstop material such as a seal sponge or rubber to the inner peripheral surface of the wire group insertion portion 19.

堰き止め部１３は、通常の射出成形機と異なる低圧射出成形機３１によって低圧射出された硬質樹脂材によって一体にモールド成形される。低圧射出成形機３１によるモールド成形は、通常の射出成形機に比べ、溶融樹脂の射出圧力が低い。そこで、堰き止め部１３をモールド成形する際の電線１５への熱による影響を抑制できる。また、低圧射出成形機３１による成形は、通常の射出成形機に比べ設備の規模を縮小できる。   The damming unit 13 is integrally molded by a hard resin material injected at a low pressure by a low pressure injection molding machine 31 different from a normal injection molding machine. Molding by the low-pressure injection molding machine 31 has a lower injection pressure of molten resin than a normal injection molding machine. Then, the influence by the heat to the electric wire 15 at the time of molding the damming part 13 can be suppressed. Further, the molding by the low-pressure injection molding machine 31 can reduce the scale of equipment as compared with a normal injection molding machine.

また、本実施形態に係るワイヤハーネスの水入り対策構造では、電線群１１を包囲するように堰き止め部１３をモールド成形する際、溶融樹脂が漏れ出しにくいので、成形型３３の平坦なバリきり５５と隣接する電線１５間との間の小さな隙間は空けたままとすることができる。この場合、例えば、電線１５が細物電線０．３５ｓｑ以下で、線径がそろっている場合に限定すると、良好な水入り対策構造が得られる。   In the wire harness countermeasure structure for a wire harness according to the present embodiment, when the damming portion 13 is molded so as to surround the electric wire group 11, the molten resin is difficult to leak out. A small gap between 55 and the adjacent electric wire 15 can be left open. In this case, for example, when the electric wire 15 is a thin electric wire of 0.35 sq or less and the wire diameters are uniform, a favorable countermeasure against water entry can be obtained.

このように、本実施形態に係るワイヤハーネスの製造方法では、低圧射出成形機３１によって低圧で堰き止め部１３のモールド成形を行うため、溶融樹脂の圧入時の圧力が低く、溶融樹脂が漏出しにくい。
即ち、下型５３のハーネス収容部５６ｂに一列の電線群１１が配置され、この電線群１１の延在方向に沿ったキャビティ５７の外側両端部分に形成された平坦なバリきり５５で一列の電線群１１を平行に挟むように合わせられた上型５１と下型５３が型締めされると、堰き止め部１３をモールド成形するための成形空間が上型５１と下型５３の間に画成される。そして、平坦なバリきり５５と隣接する電線１５との間の隙間は空けたままとしてキャビティ５７内に溶融樹脂が低圧射出される。この際、キャビティ５７内に入った溶融樹脂は、圧入時の圧力が低く、漏出しにくいので、平坦なバリきり５５と隣接する電線１５間との間の隙間からの漏出が防止され、バリが抑えられる。 As described above, in the method of manufacturing the wire harness according to the present embodiment, the damming portion 13 is molded at a low pressure by the low pressure injection molding machine 31, so that the pressure when the molten resin is injected is low and the molten resin leaks out. Hateful.
That is, a row of electric wire groups 11 is arranged in the harness housing portion 56b of the lower mold 53, and a row of electric wires is formed by flat burrs 55 formed at both ends of the cavity 57 along the extending direction of the electric wire group 11. When the upper mold 51 and the lower mold 53, which are combined so as to sandwich the group 11 in parallel, are clamped, a molding space for molding the damming portion 13 is defined between the upper mold 51 and the lower mold 53. Is done. Then, the molten resin is injected into the cavity 57 at a low pressure while leaving a gap between the flat burr 55 and the adjacent electric wire 15. At this time, since the molten resin that has entered the cavity 57 has a low pressure during press-fitting and is difficult to leak out, leakage from the gap between the flat burr hole 55 and the adjacent electric wire 15 is prevented, and burr is prevented. It can be suppressed.

このため、図９に示した比較例の成形型６０における上型６２の上型分割面６２ａ及び下型６４の下型分割面６４ａにそれぞれ形成されるハーネス収容部６７ａ，６７ｂのように、電線１５の外周に密着させるための先端が尖った複数の突条６１を有するバリきり６３を設ける必要がなくなる。
従って、本実施形態に係る成形型３３は、図８の（ａ）に示すように、フラットに近い状態に上型５１と下型５３のバリきり５５を設定してもバリを抑えることが可能となる。すなわち、平坦なバリきり５５と隣接する電線１５間との間の小さな隙間は空けたままとしてキャビティ５７に溶融樹脂を注入すると、この隙間から僅かにはみ出した溶融樹脂がすぐに固化して栓１４（図３参照）となって、キャビティ５７内からの溶融樹脂の漏出を防止する。キャビティ５７内には、所定の圧力の下に溶融樹脂が充填可能となる。その結果、電線群１１を成形型３３のハーネス収容部５６ａ，５６ｂに配置する時に、電線１５の被覆に傷をつけてしまうおそれがなくなり、慎重な取り扱いが不要となるため、ワイヤハーネスの水入り対策構造を構成する堰き止め部１３をモールド成形する際の作業性が向上する。これにより、安価な設備で、容易な作業によりワイヤハーネスの水入り対策構造が実現する。 For this reason, like the harness accommodating portions 67a and 67b respectively formed on the upper mold dividing surface 62a of the upper mold 62 and the lower mold dividing surface 64a of the lower mold 64 in the molding die 60 of the comparative example shown in FIG. There is no need to provide a burr 63 having a plurality of protruding ridges 61 with sharp tips for tight contact with the outer periphery of 15.
Therefore, as shown in FIG. 8A, the molding die 33 according to the present embodiment can suppress burrs even if the burr holes 55 of the upper die 51 and the lower die 53 are set in a nearly flat state. It becomes. That is, when the molten resin is injected into the cavity 57 while leaving a small gap between the flat burr hole 55 and the adjacent electric wire 15, the molten resin slightly protruding from this gap is immediately solidified and the plug 14. Thus, leakage of the molten resin from the cavity 57 is prevented. The cavity 57 can be filled with a molten resin under a predetermined pressure. As a result, when the electric wire group 11 is arranged in the harness housing portions 56a and 56b of the molding die 33, there is no risk of damaging the coating of the electric wire 15, and careful handling becomes unnecessary. Workability at the time of molding the damming portion 13 constituting the countermeasure structure is improved. As a result, a water harness countermeasure structure for water harnesses is realized by an easy operation with inexpensive equipment.

また、図８の（ｂ）に示した本実施形態の変形例に係る成形型３３Ａでは、下型５３Ａにおけるハーネス収容部５８ｂのバリきり５５が、一列の電線群１１を収容可能な凹状部を有し、下型分割面５３ａからの深さが電線１５の直径よりも深くされている。一方、上型５１Ａにおけるハーネス収容部５８ａのバリきり５５は、凹状部に嵌合する凸状部を有し、上型分割面５１ａから所定の高さ突出している。そして、型締め工程において、下型５３Ａにおけるバリきり５５の凹状部に収容された一列の電線群１１が、上型５１Ａにおけるバリきり５５の凸状部によって挟持方向に押圧付勢される。   Further, in the molding die 33A according to the modification of the present embodiment shown in FIG. 8B, the burrs 55 of the harness housing portion 58b in the lower die 53A have a concave portion that can accommodate the one-row electric wire group 11. And the depth from the lower mold parting surface 53 a is made deeper than the diameter of the electric wire 15. On the other hand, the burr 55 of the harness housing portion 58a in the upper mold 51A has a convex portion that fits into the concave portion, and protrudes from the upper mold dividing surface 51a by a predetermined height. In the mold clamping step, the row of electric wire groups 11 accommodated in the concave portions of the burrs 55 in the lower die 53A is pressed and urged in the clamping direction by the convex portions of the burrs 55 in the upper die 51A.

従って、本実施形態の成形型３３Ａを用いたワイヤハーネスの製造方法によれば、下型５３Ａにおけるバリきり５５の凹状部内に一列の電線群１１を収容した状態で上型５１Ａと下型５３Ａを型締めすることができる。そこで、電線群１１はハーネス収容部５８ｂに配置し易く、型締め時の電線噛み込みが生じにくくなるので、ワイヤハーネスの水入り対策構造を構成する堰き止め部１３をモールド成形する際の作業性が更に向上する。
また、型締め時にバリきり５５の凹状部に収容された一列の電線群１１が、上型５１Ａにおけるバリきり５５の凸状部によって挟持方向に押圧付勢される。そこで、電線１５の被覆が弾性変形して潰れ、平坦なバリきり５５と隣接する電線１５間との間の隙間を小さくすることができると共に、一列の電線群１１が綺麗に整列されて見栄えが向上する。 Therefore, according to the method for manufacturing a wire harness using the molding die 33A of the present embodiment, the upper die 51A and the lower die 53A are mounted in a state where the row of electric wire groups 11 is accommodated in the concave portion of the burrs 55 in the lower die 53A. The mold can be clamped. Therefore, the wire group 11 is easy to be placed in the harness housing portion 58b, and it is difficult for the wire to be caught when the mold is clamped. Therefore, the workability when molding the damming portion 13 that constitutes the countermeasure structure against water entry of the wire harness is improved. Is further improved.
Moreover, the electric wire group 11 of a row accommodated in the concave part of the burr 55 at the time of mold clamping is urged | biased in the clamping direction by the convex part of the burr 55 in the upper mold | type 51A. Therefore, the coating of the electric wires 15 is elastically deformed and crushed, so that the gap between the flat burr hole 55 and the adjacent electric wires 15 can be reduced, and the one-row electric wire group 11 is neatly arranged and looks good. improves.

また、図８の（ｃ）に示した本実施形態の変形例に係る成形型３３Ｂでは、下型５３Ｂにおけるハーネス収容部５９ｂのバリきり５５が、一列の電線群１１を整列可能な第１凹状部を有し、下型分割面５３ａからの深さが電線１５の直径の約半部の深さとされている。一方、上型５１Ｂにおけるハーネス収容部５９ａのバリきり５５は、第１凹状部に対向する第２凹状部を有し、上型分割面５１ａからの深さが電線１５の直径の約半部の深さとされている。そして、型締め工程において、下型５３Ｂにおけるバリきり５５の第１凹状部に収容された一列の電線群１１が、上型５１Ｂにおけるバリきり５５の第２凹状部によって挟持方向に押圧付勢される。   Further, in the molding die 33B according to the modification of the present embodiment shown in FIG. 8C, the burr hole 55 of the harness housing portion 59b in the lower die 53B is a first concave shape that can align the one-row electric wire group 11. The depth from the lower mold dividing surface 53a is about half the diameter of the electric wire 15. On the other hand, the burr hole 55 of the harness housing portion 59a in the upper mold 51B has a second concave portion facing the first concave portion, and the depth from the upper mold dividing surface 51a is about half of the diameter of the wire 15. It is said to be deep. In the mold clamping step, the row of electric wire groups 11 housed in the first concave portion of the burr hole 55 in the lower die 53B is pressed and urged in the clamping direction by the second concave portion of the burr hole 55 in the upper die 51B. The

従って、本実施形態の成形型３３Ｂを用いたワイヤハーネスの製造方法によれば、下型５３Ｂにおけるバリきり５５の第１凹状部内に一列の電線群１１を整列した状態で上型５１Ｂと下型５３Ｂを型締めすることができる。そこで、電線群１１はハーネス収容部５９ｂに配置し易くなるので、ワイヤハーネスの水入り対策構造を構成する堰き止め部１３をモールド成形する際の作業性が向上する。   Therefore, according to the method for manufacturing a wire harness using the molding die 33B of the present embodiment, the upper die 51B and the lower die are arranged in a state in which the electric wire group 11 is aligned in the first concave portion of the burrs 55 in the lower die 53B. 53B can be clamped. Then, since the electric wire group 11 becomes easy to arrange | position in the harness accommodating part 59b, the workability | operativity at the time of mold-forming the damming part 13 which comprises the water-filling countermeasure structure of a wire harness improves.

また、図１の（ｂ）及び図５に示した本実施形態のワイヤハーネスの水入り対策構造では、電線群１１が、電線１５の並び方向に交差する方向に離間して複数の段数で配置されている。これにより、電線１５の数が一列の電線群１１を構成する電線１５の数よりも多い場合であっても、樹脂未充填空間７０を生じさせることなく、水入り対策性能の高い堰き止め部１３の成形が可能となる。   Moreover, in the water harness countermeasure structure for a wire harness according to the present embodiment shown in FIG. 1B and FIG. 5, the electric wire group 11 is arranged in a plurality of stages spaced apart in a direction intersecting the arrangement direction of the electric wires 15. Has been. Thereby, even if it is a case where the number of the electric wires 15 is larger than the number of the electric wires 15 which comprise the electric wire group 11 of 1 row, the dam part 13 with the high water countermeasure performance without producing the resin unfilled space 70. Can be formed.

図１０に示すように、本実施形態のワイヤハーネスの水入り対策構造における堰き止め部１３Ａには、電線群挿通部１９が設けられた止水ボックス１００の一体ケース２１に係合する係合部６５が一体成形されている。係合部６５は、堰き止め部１３Ａの幅方向両端に突設された一対の固定用フランジであり、ねじ止め孔６６を有する。   As shown in FIG. 10, the damming portion 13 </ b> A in the water harness countermeasure structure of the wire harness according to the present embodiment engages with the integrated case 21 of the water blocking box 100 provided with the wire group insertion portion 19. 65 is integrally molded. The engaging portion 65 is a pair of fixing flanges protruding from both ends in the width direction of the damming portion 13 </ b> A, and has a screwing hole 66.

このワイヤハーネスの水入り対策構造では、堰き止め部１３に、電線群挿通部１９が設けられた一体ケース２１と係合する係合部６５が硬質樹脂材によって一体にモールド成形されることで、堰き止め部１３を電線群挿通部１９に直接固定することができる。即ち、係合部６５のねじ止め孔６６に挿通した取付ねじを一体ケース２１に螺着することで、堰き止め部１３を止水ボックス１００に強固に固定することができる。   In this wire harness countermeasure against water entry, the engaging portion 65 that engages the integral case 21 provided with the wire group insertion portion 19 is integrally molded with the hard resin material in the damming portion 13. The damming portion 13 can be directly fixed to the wire group insertion portion 19. That is, the damming portion 13 can be firmly fixed to the water stop box 100 by screwing the mounting screw inserted into the screwing hole 66 of the engaging portion 65 into the integrated case 21.

なお、本実施形態に係る係合部６５は、固定用フランジ形状に限らず、一体ケース２１に応じた取付け形状や位置決め形状を備えた構成とすることができる。また、係合部６５には、ナットやボルトなどを一緒にインサート成形することも可能である。   In addition, the engaging part 65 which concerns on this embodiment can be set as the structure provided with the attachment shape and positioning shape according to the integrated case 21 not only in the flange shape for fixation. The engaging portion 65 can be insert-molded together with a nut, a bolt, or the like.

また、本実施形態に係るワイヤハーネスの水入り対策構造は、成形型３３のキャビティ５７内に溶融樹脂を低圧射出することにより堰き止め部１３をモールド成形するため、堰き止め部１３の形状は成形型３３のキャビティ５７で成形できるものであればどのような形状でも対応可能である。例えば、堰き止め部の外周形状部を円柱状に形成することにより、堰き止め部が円形の電線群挿通部を有するグロメットの筒部に嵌合されたワイヤハーネスの水入り対策構造とすることができる。この場合においても、一列の電線群１１は、円形の堰き止め部に任意の段数で設けることができる。   Moreover, since the water-filling countermeasure structure of the wire harness according to the present embodiment molds the damming portion 13 by low-pressure injection of molten resin into the cavity 57 of the molding die 33, the shape of the damming portion 13 is molded. Any shape that can be molded by the cavity 57 of the mold 33 can be used. For example, by forming the outer peripheral shape part of the damming part into a columnar shape, the damming part may be a water harness countermeasure structure for fitting into a tubular part of a grommet having a circular wire group insertion part. it can. Even in this case, the row of electric wire groups 11 can be provided in any number of stages in the circular damming portion.

また、図１１の（ａ）に示したワイヤハーネスの水入り対策構造における堰き止め部１３Ｂは、互いに合体するための係合部である嵌合部２０がそれぞれ一体成形された一対の堰き止め部材（堰き止め部）１３ｄ，１３ｅを合体することにより構成されている。
嵌合部２０は、堰き止め部材１３ｄの底面に凹設された嵌合凹部１６と、堰き止め部材１３ｅの上面に突設された嵌合凸部１８とから成り、嵌合凸部１８が嵌合凹部１６に圧入嵌合されることにより、堰き止め部材１３ｄと堰き止め部材１３ｅが直接組合わされて堰き止め部１３Ｂを構成している。
また、本実施形態の嵌合凸部１８の両側面には、複数の圧入リブ１８ａが設けられている。圧入リブ１８ａは、圧入嵌合時に潰れることで、嵌合凹部１６への嵌合凸部１８の圧入嵌合を容易、且つ確実にすることができる。 In addition, the damming portion 13B in the wire harness water-filling structure shown in FIG. 11A is a pair of damming members in which the fitting portions 20 which are engaging portions for being combined with each other are integrally formed. (Damming part) It is comprised by uniting 13d and 13e.
The fitting portion 20 includes a fitting concave portion 16 that is recessed on the bottom surface of the damming member 13d, and a fitting convex portion 18 that protrudes on the top surface of the damming member 13e. By press-fitting into the mating recess 16, the blocking member 13d and the blocking member 13e are directly combined to form the blocking portion 13B.
Further, a plurality of press-fitting ribs 18a are provided on both side surfaces of the fitting convex portion 18 of the present embodiment. The press-fitting rib 18a is crushed during press-fitting so that the press-fitting of the fitting convex part 18 into the fitting concave part 16 can be easily and reliably performed.

そこで、このワイヤハーネスの水入り対策構造では、それぞれ電線群１１に一体にモールド成形された一対の堰き止め部材１３ｄ，１３ｅを合体することで、複数の電線群１１が、電線１５の並び方向に交差する方向に離間して複数の段数で配置される。これにより、電線１５の数が一列の電線群１１を構成する電線１５の数よりも多い場合であっても、樹脂未充填空間７０を生じさせることなく、水入り対策性能の高い堰き止め部１３Ｂを構成することが可能となる。   In view of this, in the water harness countermeasure structure for a wire harness, a plurality of wire groups 11 are arranged in the direction in which the wires 15 are arranged by combining a pair of damming members 13d and 13e molded integrally with the wire group 11, respectively. A plurality of stages are arranged apart from each other in the intersecting direction. Thereby, even if it is a case where the number of the electric wires 15 is larger than the number of the electric wires 15 which comprise the electric wire group 11 of 1 row, the damming part 13B with high water countermeasure performance, without producing the resin unfilled space 70. Can be configured.

また、図１１の（ｂ）に示したワイヤハーネスの水入り対策構造における堰き止め部１３Ｃは、互いに合体するための係合部であるロック機構２６がそれぞれ一体成形された一対の堰き止め部材（堰き止め部）１３ｇ，１３ｈを合体することにより構成されている。
ロック機構２６は、堰き止め部材１３ｇの両側面に突設されたロックアーム２２と、堰き止め部材１３ｈの両側面に突設されたロック突起２４とから成り、ロックアーム２２がロック突起２４に係止ロックされることにより、堰き止め部材１３ｇと堰き止め部材１３ｈが直接組合わされて堰き止め部１３Ｃを構成している。
また、本実施形態の堰き止め部１３Ｃの両側面には、一対のロック機構２６が対角位置に設けられているが、二対以上のロック機構２６を堰き止め部１３Ｃの両側面に設けることもできる。 In addition, the damming portion 13C in the wire harness water-filling structure shown in FIG. 11 (b) is a pair of damming members (in which lock mechanisms 26 that are engaging portions for uniting with each other are integrally formed) The damming portion) 13g and 13h are combined.
The lock mechanism 26 includes a lock arm 22 projecting on both sides of the damming member 13g and a lock projection 24 projecting on both sides of the damming member 13h. The lock arm 22 is engaged with the lock projection 24. By being locked, the damming member 13g and the damming member 13h are directly combined to form the damming portion 13C.
In addition, a pair of lock mechanisms 26 are provided diagonally on both side surfaces of the damming portion 13C of the present embodiment, but two or more pairs of lock mechanisms 26 are provided on both side surfaces of the damming portion 13C. You can also.

そこで、このワイヤハーネスの水入り対策構造では、それぞれ電線群１１に一体にモールド成形された一対の堰き止め部材１３ｇ，１３ｈを合体することで、複数の電線群１１が、電線１５の並び方向に交差する方向に離間して複数の段数で配置される。これにより、電線１５の数が一列の電線群１１を構成する電線１５の数よりも多い場合であっても、樹脂未充填空間７０を生じさせることなく、水入り対策性能の高い堰き止め部１３Ｃを構成することが可能となる。   Therefore, in this wire harness countermeasure against water entry, the plurality of wire groups 11 are arranged in the direction in which the wires 15 are arranged by combining the pair of damming members 13g and 13h that are integrally molded with the wire group 11 respectively. A plurality of stages are arranged apart from each other in the intersecting direction. Thereby, even if it is a case where the number of the electric wires 15 is larger than the number of the electric wires 15 which comprise the electric wire group 11 of 1 row, the dam part 13C with high water countermeasure performance, without producing the resin unfilled space 70. Can be configured.

なお、それぞれの堰き止め部材１３ｄ，１３ｅ（１３ｇ，１３ｈ）は、複数の電線群１１の延在方向の一部分を包囲するように一体にモールド成形された後、合体されて堰き止め部１３Ｂ（１３Ｃ）としてワイヤハーネスの水入り対策構造を構成するので、合体される堰き止め部材１３ｄ，１３ｅ（１３ｇ，１３ｈ）には、嵌合方向が規定される場合がある。そこで、堰き止め部材１３ｄ，１３ｅ（１３ｇ，１３ｈ）には、非対称のリブ突起とリブ収容凹部などから成る誤嵌合防止機構を設けることもできる。
更に、合体して構成される堰き止め部は、それぞれ係合部が一体成形された３つ以上の堰き止め部を互いに直接組合わせて構成することもできる。 The respective damming members 13d, 13e (13g, 13h) are integrally molded so as to surround a part of the extending direction of the plurality of electric wire groups 11, and then combined to form a damming portion 13B (13C). ) Is configured as a countermeasure against water entry of the wire harness, the fitting direction may be defined for the damming members 13d and 13e (13g and 13h) to be combined. Therefore, the damming members 13d and 13e (13g and 13h) may be provided with an erroneous fitting prevention mechanism including an asymmetric rib protrusion and a rib receiving recess.
Further, the damming portion formed by combining them may be configured by directly combining three or more damming portions, each of which is integrally formed with the engaging portion.

また、図１２の（ａ），（ｂ）に示したワイヤハーネスの水入り対策構造における堰き止め部１３Ｄは、電線群挿通部１９の内周形状に応じた外周形状部１７と、電線群１１の延在方向に沿った一対の側面１３ａ，１３ｂとを有するように一体にモールド成形されている。そして、堰き止め部１３Ｄの側面１３ａからは電線１５の突出部１５ａが突出し、堰き止め部１３Ｄの側面１３ｂからは電線１５の突出部１５ｂが突出しており、突出部１５ａの中心軸線Ｃ１と突出部１５ｂの中心軸線Ｃ２とは、互いに高さ方向（図中、上下方向）に寸法ｈ分だけずれて配置されている。   In addition, the damming portion 13D in the wire harness water-proofing structure shown in FIGS. 12A and 12B includes an outer peripheral shape portion 17 corresponding to the inner peripheral shape of the electric wire group insertion portion 19 and the electric wire group 11. Are integrally molded so as to have a pair of side surfaces 13a and 13b along the extending direction. And the protrusion part 15a of the electric wire 15 protrudes from the side surface 13a of the damming part 13D, the protrusion part 15b of the electric wire 15 protrudes from the side surface 13b of the damming part 13D, and the central axis C1 of the protrusion part 15a and the protrusion part The central axis C2 of 15b is arranged so as to be shifted by a dimension h in the height direction (vertical direction in the drawing).

そこで、堰き止め部１３Ｄに埋設された各電線１５は真っ直ぐになることはなく、ある程度自由に曲りくねることで摩擦力が増え、電線１５が一直線に埋設されたものに比べて電線１５の引抜き荷重に対する堰き止め部１３Ｄの保持力が高まる。そこで、堰き止め部１３Ｄは、電線１５の被覆との接着性がある材料を選定しなくとも、電線１５の引抜き荷重に対する保持力を向上させることができる。   Therefore, each electric wire 15 embedded in the damming portion 13D does not become straight, but the frictional force increases by bending freely to some extent, and the pulling load of the electric wire 15 is larger than that in which the electric wire 15 is embedded in a straight line. The retaining force of the damming portion 13D against the height increases. Therefore, the damming portion 13D can improve the holding force against the drawing load of the electric wire 15 without selecting a material having adhesiveness with the coating of the electric wire 15.

また、図１３に示したワイヤハーネスの水入り対策構造における堰き止め部１３Ｅは、堰き止め部１３Ｅにおける電線群１１の延在方向に沿った一対の側面１３ａ，１３ｂを貫通して各側面１３ａ，１３ｂからそれぞれ突出する電線１５の各突出部１５ａ，１５ｂの中心軸線Ｃ１，Ｃ２が、互いに幅方向（図１３中、上下方向）に寸法ｓ分だけずれて配置されている。   Moreover, the damming portion 13E in the water harness countermeasure structure shown in FIG. 13 penetrates the pair of side surfaces 13a and 13b along the extending direction of the wire group 11 in the damming portion 13E, and each side surface 13a, The central axes C1 and C2 of the projecting portions 15a and 15b of the electric wire 15 projecting from 13b are arranged so as to be shifted from each other by the dimension s in the width direction (vertical direction in FIG. 13).

そこで、堰き止め部１３Ｅに埋設された各電線１５は真っ直ぐになることはなく、ある程度自由に曲りくねることで摩擦力が増え、電線１５が一直線に埋設されたものに比べて電線１５の引抜き荷重に対する堰き止め部１３Ｄの保持力が高まる。
即ち、電線１５の各突出部１５ａ，１５ｂは、中心軸線Ｃ１，Ｃ２が一直線上に配置されないようにずれていればよく、ずれる方向は上述の高さ方向や幅方向に限定されない。 Therefore, each electric wire 15 embedded in the damming portion 13E does not become straight, but the frictional force increases by bending freely to some extent, so that the drawing load of the electric wire 15 is larger than that in which the electric wire 15 is embedded in a straight line. The retaining force of the damming portion 13D against the height increases.
That is, each protrusion part 15a, 15b of the electric wire 15 should just slip | deviate so that center axis line C1, C2 may not be arrange | positioned on a straight line, and the direction to shift is not limited to the above-mentioned height direction and width direction.

なお、これら堰き止め部１３Ｄ，１３Ｅをモールド成形する際には、上述した成形型３３（図６、参照）における上型５１と下型５３に形成されて電線群１１を挟むバリきり５５の形成位置が、電線群１１の延在方向に沿ったキャビティ５７の外側両端部分で互いにオフセットされていればよい。そして、バリきり５５で外側両端部が挟まれた電線１５のキャビティ５７内での位置は正確に固定する必要がなく、電線１５はキャビティ５７内で真っ直ぐになることはない。   When these damming portions 13D and 13E are molded, the burrs 55 formed on the upper mold 51 and the lower mold 53 in the above-described molding mold 33 (see FIG. 6) and sandwiching the wire group 11 are formed. The position should just be offset mutually in the outer both ends part of the cavity 57 along the extension direction of the electric wire group 11. FIG. And the position in the cavity 57 of the electric wire 15 by which the outer both ends were pinched | interposed with the burr hole 55 does not need to be fixed correctly, and the electric wire 15 does not become straight in the cavity 57. FIG.

図１４に示した本発明の参考例に係るワイヤハーネスは、電線１５と、電線１５の延在方向の一部分を包囲するように硬質樹脂材により一体にモールド成形された電線埋入体１１３と、を備える。
電線埋入体１１３は、電線１５が一体にモールド成形されるクランプや電線保護部材等の各種製品の一部を構成しており、電線１５の延在方向に沿った一対の側面１１３ａ，１１３ｂを有するように一体にモールド成形されている。そして、電線埋入体１１３の側面１１３ａからは電線１５の突出部１５ａが突出し、電線埋入体１１３の側面１１３ｂからは電線１５の突出部１５ｂが突出しており、突出部１５ａの中心軸線Ｃ１と突出部１５ｂの中心軸線Ｃ２とは、互いに高さ方向（図１４中、上下方向）にずれて配置されている。 The wire harness according to the reference example of the present invention shown in FIG. 14 includes an electric wire 15 and an electric wire embedded body 113 integrally molded with a hard resin material so as to surround a part of the extending direction of the electric wire 15. Is provided.
The wire embedding body 113 constitutes a part of various products such as a clamp and a wire protection member in which the wire 15 is integrally molded, and includes a pair of side surfaces 113a and 113b along the extending direction of the wire 15. It is molded integrally so as to have. And the protrusion part 15a of the electric wire 15 protrudes from the side surface 113a of the electric wire embedding body 113, and the protrusion part 15b of the electric wire 15 protrudes from the side surface 113b of the electric wire embedding body 113, and the central axis C1 of the protrusion part 15a and The protrusion 15b is arranged so as to be shifted from the central axis C2 in the height direction (vertical direction in FIG. 14).

そこで、電線埋入体１１３に埋設された電線１５は真っ直ぐになることはなく、ある程度自由に曲りくねることで摩擦力が増え、電線１５が一直線に埋設されたものに比べて電線１５の引抜き荷重に対する電線埋入体１１３の保持力が高まる。そこで、電線埋入体１１３は、電線１５の被覆との接着性がある材料を選定しなくとも、電線１５の引抜き荷重に対する保持力を向上させることができる。   Therefore, the electric wire 15 embedded in the electric wire embedded body 113 does not become straight, and the frictional force increases by bending freely to some extent, so that the extraction load of the electric wire 15 is larger than that in which the electric wire 15 is embedded in a straight line. The holding power of the electric wire embedded body 113 against increases. Therefore, the wire embedding body 113 can improve the holding force against the drawing load of the electric wire 15 without selecting a material having adhesiveness with the coating of the electric wire 15.

なお、電線埋入体１１３を備えた製品をモールド成形する際には、図示しない成形型における上型と下型に形成されて電線１５を挟むバリきりの形成位置が、電線１５の延在方向に沿ったキャビティの外側両端部分で互いにオフセットされていればよい。そして、バリきりで外側両端部が挟まれた電線１５のキャビティ内での位置は正確に固定する必要がなく、電線１５はキャビティ内で真っ直ぐになることはない。   When molding a product including the electric wire embedded body 113, the formation position of the burr formed between the upper die and the lower die in the molding die (not shown) and sandwiching the electric wire 15 is the extending direction of the electric wire 15. As long as they are offset from each other at the outer end portions of the cavity. And the position in the cavity of the electric wire 15 which the outer both ends were pinched by the burr | flash does not need to be fixed correctly, and the electric wire 15 does not become straight in the cavity.

従って、本実施形態に係るワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法によれば、電線群挿通部１９から浸入する水入り量を容易に抑制できる。   Therefore, according to the wire harness countermeasure structure and the wire harness manufacturing method according to the present embodiment, the amount of water entering from the wire group insertion portion 19 can be easily suppressed.

ここで、上述した本発明に係るワイヤハーネスの水入り対策構造及びワイヤハーネスの製造方法の実施形態の特徴をそれぞれ以下に簡潔に纏めて列記する。
［１］ 複数の電線（１５）が直径方向に並ぶ少なくとも一列の電線群（１１）と、
前記電線群（１１）の延在方向の一部分を包囲し電線群挿通部（１９）の内周形状に応じた外周形状部（１７）を有するように低圧射出された硬質樹脂材によって一体にモールド成形された堰き止め部（１３）と、を備えることを特徴とするワイヤハーネスの水入り対策構造。
［２］ 上記［１］に記載のワイヤハーネスの水入り対策構造であって、
前記電線群（１１）が、前記電線（１５）の並び方向に交差する方向に離間して複数の段数で配置されることを特徴とするワイヤハーネスの水入り対策構造。
［３］ 上記［１］または［２］に記載のワイヤハーネスの水入り対策構造であって、
前記堰き止め部（１３）には、前記電線群挿通部（１９）が設けられた隔壁部（２１；２１ａ，２１ｂ）に係合する係合部（６５）が一体成形されることを特徴とするワイヤハーネスの水入り対策構造。
［４］ 上記［１］または［２］に記載のワイヤハーネスの水入り対策構造であって、
複数の前記堰き止め部（堰き止め部材１３ｄ，１３ｅ；堰き止め部材１３ｇ，１３ｈ）には、互いに相手方の前記堰き止め部（堰き止め部材１３ｅ，１３ｄ；堰き止め部材１３ｈ，１３ｇ）と合体するための係合部（嵌合部２０；ロック機構２６）が一体成形されることを特徴とするワイヤハーネスの水入り対策構造。
［５］ 上記［１］〜［４］の何れか１つに記載のワイヤハーネスの水入り対策構造であって、
前記堰き止め部（１３Ｄ）における前記電線群（１１）の延在方向に沿った一対の側面（１３ａ，１３ｂ）を貫通して各側面からそれぞれ突出する前記電線の各突出部（１５ａ，１５ｂ）は、中心軸線（Ｃ１，Ｃ２）がずれて配置されていることを特徴とするワイヤハーネスの水入り対策構造。
［６］ 複数の電線（１５）が直径方向に並ぶ少なくとも一列の電線群（１１）と、前記電線群（１１）の延在方向の一部分を包囲し電線群挿通部（１９）の内周形状に応じた外周形状部（１７）を有する硬質樹脂材製の堰き止め部（１３）と、を備えるワイヤハーネスの製造方法であって、
前記堰き止め部（１３）をモールド成形するためのキャビティ（５７）と、前記一列の電線群（１１）の延在方向に沿った前記キャビティ（５７）の外側両端部分において前記一列の電線群（１１）の外周を挟む平坦なバリきり（５５）とを有するハーネス収容部（５６ａ，５６ｂ）が分割面（上型分割面５１ａ及び下型分割面５３ａ）にそれぞれ形成された上型（５１）及び下型（５３）を、前記ハーネス収容部（５６ａ，５６ｂ）に前記一列の電線群（１１）の一部分を配置して型締めする型締め工程と、
溶融した硬質樹脂材を前記キャビティ（５７）内に低圧射出する射出工程と、
を含むことを特徴とするワイヤハーネスの製造方法。
［７］ 上記［６］に記載のワイヤハーネスの製造方法であって、
前記下型（５３）における前記バリきり（５５）が、前記一列の電線群（１１）を収容可能な凹状部を有すると共に、前記上型（５１）における前記バリきり（５５）が、前記凹状部に嵌合する平板状部を有し、
前記型締め工程において前記凹状部に収容された前記一列の電線群（１１）が、前記平板状部によって挟持方向に押圧付勢されることを特徴とするワイヤハーネスの製造方法。
［８］ 電線（１５）と、前記電線の延在方向の一部分を包囲するように硬質樹脂材により一体にモールド成形された電線埋入体（１１３）と、を備えたワイヤハーネスであって、
前記電線埋入体における前記電線の延在方向に沿った一対の側面（１１３ａ，１１３ｂ）を貫通して各側面からそれぞれ突出する前記電線の各突出部（１５ａ，１５ｂ）は、中心軸線（Ｃ１，Ｃ２）がずれて配置されていることを特徴とするワイヤハーネス。 Here, the features of the embodiment of the wire harness countermeasure structure and the wire harness manufacturing method according to the present invention described above will be briefly summarized below.
[1] At least one row of electric wire groups (11) in which a plurality of electric wires (15) are arranged in the diameter direction;
Molded integrally with a hard resin material injected at low pressure so as to surround a part in the extending direction of the wire group (11) and to have an outer peripheral shape portion (17) corresponding to the inner peripheral shape of the electric wire group insertion portion (19). A water harness countermeasure structure for a wire harness, comprising: a molded damming portion (13).
[2] The water harness countermeasure structure for a wire harness according to [1] above,
The wire harness countermeasure structure against water entry, wherein the electric wire group (11) is spaced apart in a direction intersecting the arrangement direction of the electric wires (15) in a plurality of stages.
[3] The water harness countermeasure structure for a wire harness according to [1] or [2] above,
The damming portion (13) is integrally formed with an engaging portion (65) that engages with a partition wall portion (21; 21a, 21b) provided with the wire group insertion portion (19). Measures against entering water in the wire harness.
[4] The water harness countermeasure structure for a wire harness according to [1] or [2] above,
The plurality of damming portions (damming members 13d and 13e; damming members 13g and 13h) are combined with the other damming portions (damming members 13e and 13d; damming members 13h and 13g). The wire harness countermeasure structure for water entry, wherein the engaging portion (fitting portion 20; lock mechanism 26) is integrally formed.
[5] The wire harness countermeasure structure for water entry according to any one of [1] to [4] above,
Each protrusion (15a, 15b) of the said electric wire which penetrates a pair of side surface (13a, 13b) along the extension direction of the said electric wire group (11) in the said damming part (13D), and protrudes from each side surface, respectively. Is a countermeasure against water entry of a wire harness, characterized in that the central axes (C1, C2) are displaced from each other.
[6] An inner peripheral shape of the wire group insertion portion (19) surrounding at least one row of the wire group (11) in which the plurality of wires (15) are arranged in the diameter direction and a part in the extending direction of the wire group (11). A dammed portion (13) made of a hard resin material having an outer peripheral shape portion (17) according to
Cavities (57) for molding the damming portion (13), and the row of electric wires (at the outer end portions of the cavities (57) along the extending direction of the row of electric wires (11) ( 11) Upper molds (51) in which harness accommodating portions (56a, 56b) having flat burr holes (55) sandwiching the outer periphery of 11) are respectively formed on the dividing surfaces (upper mold dividing surface 51a and lower mold dividing surface 53a). And a mold clamping step of clamping the lower mold (53) by disposing a part of the row of electric wire groups (11) in the harness housing part (56a, 56b),
An injection step of low-pressure injection of the molten hard resin material into the cavity (57);
The manufacturing method of the wire harness characterized by including this.
[7] The method for manufacturing the wire harness according to [6] above,
The burr hole (55) in the lower mold (53) has a concave portion capable of accommodating the row of electric wire groups (11), and the burr hole (55) in the upper mold (51) is the concave shape. Has a flat part that fits into the part,
The method of manufacturing a wire harness, wherein, in the mold clamping step, the row of electric wire groups (11) accommodated in the concave portion is pressed and urged in the clamping direction by the flat plate portion.
[8] A wire harness comprising an electric wire (15) and an electric wire embedded body (113) integrally molded with a hard resin material so as to surround a part of the extending direction of the electric wire,
The protruding portions (15a, 15b) of the electric wires that protrude from the side surfaces through the pair of side surfaces (113a, 113b) along the extending direction of the electric wires in the electric wire embedded body are center axis lines (C1). , C2) are arranged so as to deviate from each other.

なお、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材質、形状、寸法、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 material, shape, dimensions, 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.

１１…電線群
１３…堰き止め部
１５…電線
１７…外周形状部
１９…電線群挿通部
３１…低圧射出成形機
５１…上型
５１ａ…上型分割面（分割面）
５３…下型
５３ａ…下型分割面（分割面）
５５…バリきり
５７…キャビティ
６５…係合部 DESCRIPTION OF SYMBOLS 11 ... Electric wire group 13 ... Damming part 15 ... Electric wire 17 ... Outer peripheral shape part 19 ... Electric wire group insertion part 31 ... Low pressure injection molding machine 51 ... Upper mold | type 51a ... Upper mold | die division surface (division surface)
53 ... Lower mold 53a ... Lower mold dividing surface (dividing surface)
55 ... Burr hole 57 ... Cavity 65 ... engagement part

Claims (3)

複数の電線が直径方向に並ぶ少なくとも一列の電線群と、前記電線群の延在方向の一部分を包囲し電線群挿通部の内周形状に応じた外周形状部を有する硬質樹脂材製の堰き止め部と、を備えるワイヤハーネスの製造方法であって、
前記堰き止め部をモールド成形するためのキャビティと、前記一列の電線群の延在方向に沿った前記キャビティの外側両端部分において前記一列の電線群の外周を挟む平坦なバリきりとを有するハーネス収容部が分割面にそれぞれ形成された上型及び下型を、前記ハーネス収容部に前記一列の電線群の一部分を配置して型締めする型締め工程と、
溶融した硬質樹脂材を前記キャビティ内に低圧射出する射出工程と、
を含むことを特徴とするワイヤハーネスの製造方法。 A dam made of a hard resin material that surrounds at least one row of wire groups in which a plurality of wires are arranged in the diameter direction and an outer peripheral shape portion that surrounds a part of the extending direction of the wire group and corresponds to the inner peripheral shape of the wire group insertion portion. A wire harness manufacturing method comprising:
A harness housing having a cavity for molding the damming portion, and a flat burr that sandwiches the outer periphery of the row of electric wires at both ends of the cavity along the extending direction of the row of electric wires. A mold clamping step of clamping the upper mold and the lower mold, each of which is formed on the split surface, by placing a part of the row of electric wires in the harness housing section and clamping the mold;
An injection process of low-pressure injection of the molten hard resin material into the cavity;
The manufacturing method of the wire harness characterized by including this. 請求項１に記載のワイヤハーネスの製造方法であって、
前記下型における前記バリきりが、前記一列の電線群を収容可能な凹状部を有すると共に、前記上型における前記バリきりが、前記凹状部に対向する平板状部を有し、
前記型締め工程において前記凹状部に収容された前記一列の電線群が、前記平板状部によって挟持方向に押圧付勢されることを特徴とするワイヤハーネスの製造方法。 It is a manufacturing method of the wire harness according to claim 1,
The burrs in the lower mold have a concave portion that can accommodate the row of electric wires, and the burrs in the upper mold have a flat plate portion facing the concave portions,
The method of manufacturing a wire harness, wherein in the mold clamping step, the row of electric wires housed in the concave portion is pressed and urged in the clamping direction by the flat plate portion. 請求項１または請求項２に記載のワイヤハーネスの製造方法であって、It is a manufacturing method of the wire harness according to claim 1 or 2,
前記上型と前記下型に形成されて前記一列の電線群の外周を挟む前記バリきりの形成位置が、前記一列の電線群の延在方向に沿った前記キャビティの外側両端部分で互いにオフセットされていることを特徴とするワイヤハーネスの製造方法。The formation positions of the burrs formed on the upper mold and the lower mold and sandwiching the outer circumference of the row of electric wire groups are offset from each other at both ends of the cavity along the extending direction of the row of electric wire groups. The manufacturing method of the wire harness characterized by the above-mentioned.
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