JP2010187474A

JP2010187474A - Cable protection tube

Info

Publication number: JP2010187474A
Application number: JP2009029826A
Authority: JP
Inventors: Kunihiko Watanabe; 邦彦渡邉
Original assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Current assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Priority date: 2009-02-12
Filing date: 2009-02-12
Publication date: 2010-08-26

Abstract

PROBLEM TO BE SOLVED: To provide a cable protection tube having flexibility and high strength. SOLUTION: The cable protection tube 10 has a cylindrical protector 20 allowing a cable 70 to be inserted therethrough, and a coupling unit tube 30 allowing a plurality of unit tubes 31 to be coupled at positions different from that of the cylindrical protector 20 and the cable 70 to be inserted thereinto. The unit tubes 31 each have a cylindrical part 33 having an electric wire insertion hole 21 allowing the cable 70 to be inserted therethrough, a curved surface part 35 continuing to the cylindrical part 33 and having an outer circumferential surface like a curved surface, and a concave surface part 37 continuing to the cylindrical part 33 on the side opposite to the curved surface part 35 and fitted to the curved surface part 35 of the adjacent unit tube 31 to slide on the outer circumferential surface of the curved surface part 35. COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、電線保護管に関する。 The present invention relates to a wire protective tube.

従来、筒状のプロテクタが知られている。このプロテクタに電線が挿通されることで、外部の衝撃等から電線を保護するようになっている。 Conventionally, a cylindrical protector is known. By inserting the electric wire through the protector, the electric wire is protected from an external impact or the like.

特開２００２−１８６１３１号公報JP 2002-186131 A

ところで、上記したプロテクタは、外部の衝撃等から電線を保護することができるものの可撓性を有していないため、配置する場所に応じて湾曲させることができず、使用する場所が限られてしまうという問題があった。 By the way, although the above protector can protect the electric wire from an external impact or the like but does not have flexibility, it cannot be bent according to the place where it is placed, and the place where it is used is limited. There was a problem that.

本発明は上記のような事情に基づいて完成されたものであって、可撓性を有し、かつ、強度の強い電線保護管を提供することを目的とする。 This invention is completed based on the above situations, Comprising: It aims at providing a flexible and strong electric wire protection tube.

本発明は、内部に電線が挿通される筒状プロテクタと、前記筒状プロテクタとは異なる位置にて複数の単位チューブが連結され、その内部に電線が挿通される連結単位チューブと、を有する電線保護管であって、前記各単位チューブは、前記電線が挿通される電線挿通孔を有した筒部と、前記筒部に連なり、曲面状の外周面を有する曲面部と、前記曲面部とは反対側にて前記筒部に連なり、隣接する単位チューブの前記曲面部と嵌り合ってその曲面部の前記外周面に対して摺動する凹状面部と、を備えるところに特徴を有する（手段１）。
手段１の構成によれば、電線保護管に電線が挿通されることにより、電線を外部からの強い衝撃等から保護できる。また、連結単位チューブは、単位チューブの曲面部とこれと隣接する単位チューブの凹状面部とが嵌り合ってその曲面部の前記外周面に対して摺動するから、連結単位チューブを有する電線保護管は、連結単位チューブの位置で曲げることができる。即ち、可撓性を有し、かつ、強度の強い電線保護管とすることができる。
なお、可撓性を有しつつ電線を保護するという点では、電線保護管の全ての部分を連結単位チューブで構成することも可能であるが、連結単位チューブの部分については、可撓性を有するための構成により、筒状プロテクタよりも体積が大きくなりやすく、その分重量が重くなりやすい。一方、手段１の構成によれば、可撓性を有する必要のある部分については、連結単位チューブとし、可撓性を有する必要のない部分については、筒状プロテクタにより電線を保護するから、全てを連結単位チューブとする場合よりも電線保護管を軽量化することができる。 The present invention includes a cylindrical protector into which an electric wire is inserted, and a connecting unit tube in which a plurality of unit tubes are connected at positions different from the cylindrical protector, and the electric wire is inserted into the inner tube. Each of the unit tubes is a protective tube, and a cylindrical portion having an electric wire insertion hole through which the electric wire is inserted, a curved surface portion having a curved outer peripheral surface connected to the cylindrical portion, and the curved surface portion are: And a concave surface portion that is connected to the curved surface portion of the adjacent unit tube and slides with respect to the outer peripheral surface of the curved surface portion (means 1). .
According to the structure of the means 1, an electric wire can be protected from the strong impact from the outside etc. by inserting an electric wire in the electric wire protection tube. Further, since the connecting unit tube is fitted with the curved surface portion of the unit tube and the concave surface portion of the adjacent unit tube and slides with respect to the outer peripheral surface of the curved surface portion, the electric wire protection tube having the connecting unit tube Can be bent at the position of the connecting unit tube. That is, the electric wire protective tube having flexibility and high strength can be obtained.
In addition, in terms of protecting the electric wire while having flexibility, it is possible to configure all the portions of the electric wire protection tube with the connection unit tube, but the portion of the connection unit tube should be flexible. Due to the configuration to have, the volume tends to be larger than that of the cylindrical protector, and the weight tends to increase accordingly. On the other hand, according to the structure of the means 1, the portion that needs to be flexible is a connecting unit tube, and the portion that does not need to be flexible is protected by the cylindrical protector. It is possible to reduce the weight of the electric wire protection tube as compared with the case where the connection unit tube is used.

手段１の構成に加えて、前記連結単位チューブと前記筒状プロテクタとを連結する連結部材を有し、前記連結部材の一端側には、前記単位チューブの前記曲面部と嵌り合ってその曲面部の前記外周面に対して摺動する連結用凹状面部又は前記単位チューブの前記凹状面部と嵌り合ってその凹状面部の前記内周面に対して摺動する連結用曲面部が設けられるとともに、前記連結部材の他端側には、前記筒状プロテクタに係止する連結係止部が設けられるようにしてもよい（手段２）。
手段２の構成によれば、連結部材により連結単位チューブと筒状プロテクタとが連結されるから、連結単位チューブと筒状プロテクタとが離れて内部の電線が露出することを防止することができる。
また、連結単位チューブ及び筒状プロテクタの連結のための構成を連結部材に設けることにより、連結のために構成の異なる単位チューブや筒状プロテクタを別途用意する必要がないから、単位チューブ間や筒状プロテクタ間の構成を共通化することが可能になる。 In addition to the configuration of the means 1, a connecting member for connecting the connecting unit tube and the cylindrical protector is provided, and the curved surface portion of the connecting tube is fitted to the curved portion of the connecting tube at one end side of the connecting member. A connecting concave surface portion that slides with respect to the outer peripheral surface or a connecting curved surface portion that fits with the concave surface portion of the unit tube and slides with respect to the inner peripheral surface of the concave surface portion, and On the other end side of the connecting member, a connecting locking portion that locks to the cylindrical protector may be provided (means 2).
According to the structure of the means 2, since a connection unit tube and a cylindrical protector are connected by a connection member, it can prevent that a connection unit tube and a cylindrical protector leave | separate and an internal electric wire is exposed.
In addition, by providing the connecting member with a structure for connecting the connecting unit tubes and the cylindrical protector, it is not necessary to separately prepare unit tubes and cylindrical protectors having different structures for the connection. It is possible to share the configuration between the shape protectors.

手段１又は手段２の構成に加えて、前記連結係止部は、係止凹部であり、前記筒状プロテクタには、係止凸部が形成され、前記係止凸部が前記係止凹部に係止されることにより前記筒状プロテクタと前記連結部材とが連結されるようにしてもよい（手段３）。
手段３の構成によれば、簡易な構成で、比較的強固に筒状プロテクタと連結部材とを連結することができる。 In addition to the configuration of the means 1 or 2, the connection locking portion is a locking recess, the cylindrical protector is formed with a locking projection, and the locking projection is formed on the locking recess. The cylindrical protector and the connecting member may be connected by being locked (means 3).
According to the configuration of the means 3, the cylindrical protector and the connecting member can be connected relatively firmly with a simple configuration.

手段１ないし手段３のいずれか一項の構成に加えて、前記各単位チューブにおける前記筒部は、前記電線の外周が密着した状態で挿通されるとともに、前記曲面部は、前記筒部の電線挿通孔に連なり端部側の径が大きくなる撓み許容孔を有するようにしてもよい（手段４）。
例えば、コルゲートチューブを用いて電線を保護する場合には、通電時に電線から発生する熱は、電線からコルゲートチューブへと伝達されて、コルゲートチューブから外部に放散される。しかしながら電線とコルゲートチューブとの間には、空気層が存在する。この空気層は熱伝導率が比較的低いので、コルゲートチューブの内部に熱がこもって、電線が高温になってしまう。特に、自動車のインバータやモータなどの機器間に配される電線をコルゲートチューブで保護する場合には、電線から発生する熱が大きいため、電線が高温になることが懸念される。
一方、手段４の構成によれば、各単位チューブの筒部に電線の外周が密着した状態で挿通することにより、熱伝導性の悪い空気層を介さず、電線から生じた熱を筒部を介して外部に放散することができる。
また、筒部について電線を密着させた場合に、曲面部についても筒部と同様に電線を密着させることにすると、電線の遊びがなくなり、単位チューブの連結部分を屈曲させることが困難になるばかりでなく、無理に屈曲させると、電線が傷つくおそれがある。
一方、手段４の構成のように、電線挿通孔に連なり、端部側ほど径が大きくなる撓み許容孔を有するようにすれば、屈曲させる際の電線の遊びができ、連結部分の屈曲が容易になるだけでなく、屈曲の際に内部の電線を傷つけずに済む。 In addition to the configuration of any one of the means 1 to 3, the cylindrical portion in each unit tube is inserted in a state where the outer periphery of the electric wire is in close contact, and the curved portion is an electric wire of the cylindrical portion You may make it have a bending | flexion tolerance hole which continues to an insertion hole and the diameter of an edge part side becomes large (means 4).
For example, when protecting an electric wire using a corrugated tube, the heat generated from the electric wire when energized is transmitted from the electric wire to the corrugated tube and dissipated from the corrugated tube to the outside. However, an air layer exists between the electric wire and the corrugated tube. Since this air layer has a relatively low thermal conductivity, heat is trapped inside the corrugated tube and the electric wire becomes hot. In particular, when an electric wire arranged between devices such as an inverter and a motor of a car is protected with a corrugated tube, there is a concern that the electric wire becomes hot because the heat generated from the electric wire is large.
On the other hand, according to the configuration of the means 4, by inserting the cylindrical portion of each unit tube in a state where the outer periphery of the electric wire is in close contact, heat generated from the electric wire is transferred to the cylindrical portion without passing through an air layer having poor thermal conductivity. Can be dissipated to the outside.
Moreover, when the electric wire is brought into close contact with the cylindrical portion, if the electric wire is brought into close contact with the curved surface portion in the same manner as the cylindrical portion, there is no play of the electric wire, and it becomes difficult to bend the connecting portion of the unit tube. If it is bent forcibly, the wires may be damaged.
On the other hand, if there is a bending allowance hole that is continuous with the wire insertion hole and has a diameter that increases toward the end as in the configuration of the means 4, it is possible to play the electric wire when bending, and to easily bend the connecting portion. In addition, it is possible to avoid damaging the internal electric wire during bending.

本発明によれば、可撓性を有し、かつ、強度の強い電線保護管を提供することができる。 According to the present invention, it is possible to provide an electric wire protection tube having flexibility and high strength.

本発明に係る実施形態の電線保護管に電線が挿入された状態を表す図The figure showing the state by which the electric wire was inserted in the electric wire protection tube of embodiment which concerns on this invention 単位チューブを表す斜視図Perspective view showing the unit tube 分割単位チューブを表す側面図Side view showing split unit tube 分割単位チューブを表す斜視図A perspective view showing a divided unit tube 凹状面部付連結部材を表す斜視図The perspective view showing the connection member with a concave surface part 凹状面部付連結部材を構成する分割連結部材に分割プロテクタが連結される前の状態を表す斜視図The perspective view showing the state before a division | segmentation protector is connected with the division | segmentation connection member which comprises a connection member with a concave surface part. 図６の分割連結部材と分割プロテクタとが連結された状態を表す斜視図The perspective view showing the state with which the division | segmentation connection member and division | segmentation protector of FIG. 6 were connected. 凹状面部付連結部材と筒状プロテクタとが連結された状態を表す図The figure showing the state by which the connection member with a concave surface part and the cylindrical protector were connected 曲面部付連結部材を表す斜視図Perspective view showing connecting member with curved surface 曲面部付連結部材を構成する分割連結部材に分割プロテクタが連結される前の状態を表す斜視図The perspective view showing the state before a division | segmentation protector is connected with the division | segmentation connection member which comprises a connection member with a curved surface part. 図１０の分割連結部材と分割プロテクタとが連結された状態を表す斜視図The perspective view showing the state with which the division | segmentation connection member and division | segmentation protector of FIG. 10 were connected. 曲面部付連結部材と筒状プロテクタとが連結された状態を表す図The figure showing the state by which the connection member with a curved surface part and the cylindrical protector were connected 組み付け治具の基台に電線が載置された状態を表す図The figure showing the state where the electric wire was placed on the base of the assembly jig 電線挟持部が電線を挟持した状態を表す図The figure showing the state where the electric wire clamping part pinched the electric wire 電線に分割プロテクタが取り付けられた状態を表す図The figure showing the state where the division protector was attached to the electric wire 組み付け治具を取り外した状態を表す図Diagram showing the state where the assembly jig is removed 図１６に曲面部付連結部材を取り付けた状態を表す図The figure showing the state which attached the connecting member with a curved surface part in FIG. 電線が挿通された状態の電線保護管を表す図The figure showing the electric wire protection tube in the state where the electric wire was inserted 電線保護管を湾曲させた状態を表す図Diagram showing the state where the wire protection tube is bent

＜実施形態＞
以下、本発明の実施形態を図１〜図１９を参照して説明する。
本実施形態における電線保護管１０は、図１に示すように、筒状プロテクタ２０と、複数の単位チューブ３１が連結されてなる連結単位チューブ３０と、筒状プロテクタ２０と連結単位チューブ３０とを連結する連結部材４０と、から構成されている。電線７０が挿通された電線保護管１０は、例えば、電気自動車において走行用の動力源を構成するバッテリ、インバータ、モータなどの装置（図示せず）の間に配索される。以下では、図１の左方に延びる方向を前方、上方に延びる方向を後方として説明する。 <Embodiment>
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the wire protection tube 10 in the present embodiment includes a cylindrical protector 20, a connection unit tube 30 in which a plurality of unit tubes 31 are connected, a cylindrical protector 20, and a connection unit tube 30. And a connecting member 40 to be connected. The electric wire protection tube 10 into which the electric wire 70 is inserted is routed, for example, between devices (not shown) such as a battery, an inverter, and a motor that constitute a power source for traveling in an electric vehicle. In the following, the direction extending leftward in FIG. 1 will be described as the front, and the direction extending upward will be described as the rear.

筒状プロテクタ２０は、合成樹脂製で、内部に電線７０を挿通可能な電線挿通孔２１を有する筒形をなす（図１９参照）。この電線挿通孔２１の径は、挿通される電線７０の径にほぼ等しく、電線７０が挿通されると、電線７０の外周が内面に密着する。 The cylindrical protector 20 is made of a synthetic resin and has a cylindrical shape having an electric wire insertion hole 21 into which the electric wire 70 can be inserted (see FIG. 19). The diameter of the electric wire insertion hole 21 is substantially equal to the diameter of the electric wire 70 to be inserted, and when the electric wire 70 is inserted, the outer periphery of the electric wire 70 is in close contact with the inner surface.

また、筒状プロテクタ２０は、図６に示すように、半筒形の一対の分割プロテクタ２２，２２（図６は片方の分割プロテクタ２２のみ図示）を嵌め合わせて構成されている。
分割プロテクタ２２，２２は、共に同形であって、電線７０が挿通される半筒形の分割プロテクタ本体部２３と、分割プロテクタ本体部２３の分割端面２３Ａから幅方向に張り出す張出部２４と、からなる。 As shown in FIG. 6, the cylindrical protector 20 is configured by fitting a pair of semi-cylindrical split protectors 22 and 22 (FIG. 6 shows only one split protector 22).
Each of the split protectors 22 and 22 has the same shape, and is a semi-cylindrical split protector main body portion 23 through which the electric wire 70 is inserted, and an overhang portion 24 that projects in the width direction from the split end surface 23A of the split protector main body portion 23. It consists of.

分割プロテクタ本体部２３には、電線通し溝部２５が形成されている。分割プロテクタ２２，２２を嵌め合わせると、電線通し溝部２５，２５が電線挿通孔２１となる。 The split protector body 23 is formed with an electric wire passage groove 25. When the split protectors 22 and 22 are fitted together, the wire passage groove portions 25 and 25 become the wire insertion holes 21.

分割プロテクタ２２，２２の張出部２４には、この張出部２４を長方形状に切欠いた切欠部２６が形成されている。
これにより、張出部２４のうち、切欠部２６の前方の部分が後述する連結部材４０に係止される係止凸部２７となり、切欠部２６の後方の部分が分割プロテクタ２２，２２を嵌め合わせた後に、両分割プロテクタ２２，２２を溶着して一体化する被溶着部２８となっている。 A cutout portion 26 is formed in the overhang portion 24 of each of the split protectors 22 and 22 by cutting out the overhang portion 24 into a rectangular shape.
Thereby, the front part of the notch part 26 becomes the latching convex part 27 latched by the connection member 40 mentioned later among the overhang | projection parts 24, and the rear part of the notch part 26 fits the division | segmentation protectors 22 and 22. FIG. After being combined, the two divided protectors 22, 22 are welded and integrated to be integrated.

次に、連結単位チューブ３０について説明する。
連結単位チューブ３０は、図１に示すように、筒状プロテクタ２０，２０の間（筒状プロテクタ２０とは異なる位置）に配されて、複数の単位チューブ３１を連結して構成されている。 Next, the connection unit tube 30 will be described.
As shown in FIG. 1, the connecting unit tube 30 is arranged between the cylindrical protectors 20 and 20 (a position different from the cylindrical protector 20), and is configured by connecting a plurality of unit tubes 31.

各単位チューブ３１は、図２に示すように、軸方向（挿通される電線７０の軸方向。後述する筒部３３の軸方向と同じ）の中央部の電線保持部３２と、電線保持部３２に連なり電線保持部３２よりも軸方向の前端側（一端側）の曲面部３５と、電線保持部３２に連なり電線保持部３２よりも軸方向の後端側（曲面部３５とは反対側）の凹状の内周面を有する凹状面部３７と、からなる。 As shown in FIG. 2, each unit tube 31 has an electric wire holding portion 32 at the center in the axial direction (the axial direction of the inserted electric wire 70. The same as the axial direction of a tube portion 33 described later), and the electric wire holding portion 32. A curved surface portion 35 at the front end side (one end side) in the axial direction from the electric wire holding portion 32 and a rear end side in the axial direction from the electric wire holding portion 32 to the electric wire holding portion 32 (on the opposite side to the curved surface portion 35). And a concave surface portion 37 having a concave inner peripheral surface.

電線保持部３２は、円筒形状の筒部３３と、筒部３３の外周に設けれる放熱リブ３４と、を有する。
筒部３３は、図４に示すように、円形状の内周面を形成する電線挿通孔４１を有する。電線挿通孔４１は、挿通される電線７０の外形とほぼ同一であって、電線７０が挿通された際には、電線７０の外周が電線挿通孔４１（筒部３３）の内周面にほぼ密着する。 The electric wire holding portion 32 includes a cylindrical tube portion 33 and a heat radiating rib 34 provided on the outer periphery of the tube portion 33.
As shown in FIG. 4, the cylindrical portion 33 has a wire insertion hole 41 that forms a circular inner peripheral surface. The electric wire insertion hole 41 is substantially the same as the outer shape of the electric wire 70 to be inserted, and when the electric wire 70 is inserted, the outer periphery of the electric wire 70 is substantially on the inner peripheral surface of the electric wire insertion hole 41 (cylinder portion 33). In close contact.

なお、本実施形態では、電線７０には、内側から芯線７１、内皮７２（絶縁被覆）、編組線７３（シールド層）の順に形成（積層）されたいわゆるシールド電線が用いられている。よって、編組線７３が筒部３３の内周面にほぼ密着する。なお、電線には、シールド電線であって、編組線７３（シールド層）の周囲に、更に外皮（絶縁被覆）が形成されているものを用いてもよい。また、シールド電線以外も用いることができ、芯線７１（単芯線７１やより線）のみの裸線や、芯線７１を絶縁被覆で覆う被覆電線も可能である。 In this embodiment, as the electric wire 70, a so-called shielded electric wire formed (laminated) in the order of the core wire 71, the inner skin 72 (insulation coating), and the braided wire 73 (shield layer) is used. Therefore, the braided wire 73 is almost in close contact with the inner peripheral surface of the cylindrical portion 33. The electric wire may be a shielded electric wire having a sheath (insulating coating) formed around the braided wire 73 (shield layer). Further, other than shielded wires can be used, and a bare wire having only the core wire 71 (single core wire 71 or stranded wire) or a covered wire covering the core wire 71 with an insulating coating is also possible.

放熱リブ３４は、筒部３３の軸方向に所定の間隔を挟んで三個（複数個）並んで設けられている。各放熱リブ３４は、一定の高さで筒部３３の全周に亘って環状に形成されており、各放熱リブ３４の厚みは、筒部３３の厚みとほぼ同じである。各放熱リブ３４の高さは、放熱リブ３４の外径（環状の放熱リブ３４の中心からの径）が凹状面部３７のうち（最大となる）端部側の部分の外径にほぼ等しくなっている。 Three (a plurality) of the heat radiating ribs 34 are provided side by side with a predetermined interval in the axial direction of the cylindrical portion 33. Each heat radiating rib 34 is annularly formed over the entire circumference of the tube portion 33 at a constant height, and the thickness of each heat radiating rib 34 is substantially the same as the thickness of the tube portion 33. The height of each of the heat radiating ribs 34 is substantially equal to the outer diameter of the portion of the concave surface portion 37 where the outer diameter (the diameter from the center of the annular heat radiating rib 34) is (maximum). ing.

曲面部３５は、筒部３３の外周に連なる球形の外周面を有する。曲面部３５の内部には、筒部３３の電線挿通孔４１に連なる撓み許容孔３６が形成されている。 The curved surface portion 35 has a spherical outer peripheral surface that is continuous with the outer periphery of the cylindrical portion 33. Inside the curved surface portion 35, a bending allowance hole 36 that is continuous with the electric wire insertion hole 41 of the tube portion 33 is formed.

撓み許容孔３６は、電線７０の撓み変形を可能にするための円形状の電線挿通孔である。
具体的には、この撓み許容孔３６は、筒部３３側の端部が電線挿通孔４１と同じ大きさの円形状であって電線挿通孔４１に連なっており、そこから他端側（単位チューブ３１の前端部側）に向かうほど広がる（撓み許容孔３６の径が全方位に大きくなる）形状となっている。 The bending allowable hole 36 is a circular electric wire insertion hole for allowing the electric wire 70 to be bent and deformed.
Specifically, the bending allowance hole 36 has a circular portion having the same size as that of the electric wire insertion hole 41 at the end on the cylindrical portion 33 side, and is connected to the electric wire insertion hole 41, from which the other end side (unit It becomes a shape that widens toward the front end portion side of the tube 31 (the diameter of the bending allowance hole 36 increases in all directions).

凹状面部３７は、フード状であって、曲面部３５とは反対側にて筒部３３に連なり、その凹状の内面が隣接する他の単位チューブ３１の曲面部３５と嵌り合ってその曲面部３５の外周面に対して摺動する（曲面部３５を軸受する）摺接面とされている。なお、凹状面部３７の厚みは、筒部３３の厚みとほぼ同じである。 The concave surface portion 37 has a hood shape, and is connected to the cylindrical portion 33 on the side opposite to the curved surface portion 35. The concave inner surface is fitted to the curved surface portion 35 of another adjacent unit tube 31, and the curved surface portion 35 is fitted. The sliding contact surface that slides on the outer peripheral surface (bears the curved surface portion 35). The thickness of the concave surface portion 37 is substantially the same as the thickness of the cylindrical portion 33.

凹状面部３７の外周面には、図２に示すように、ロック部３８と、ロック部３８に係合するロック受け部３９と、が形成されている。
これらロック部３８及びロック受け部３９は、図４に示すように、凹状面部３７の後端部のうち、分割端面の近傍に形成されており、このうち、ロック部３８が凹状面部３７の一方の側（図４では上部）に形成されており、ロック受け部３９が凹状面部３７の他方の側（図４では下部）に形成されている。 As shown in FIG. 2, a lock portion 38 and a lock receiving portion 39 that engages with the lock portion 38 are formed on the outer peripheral surface of the concave surface portion 37.
As shown in FIG. 4, the lock portion 38 and the lock receiving portion 39 are formed in the vicinity of the divided end surface in the rear end portion of the concave surface portion 37, and of these, the lock portion 38 is one of the concave surface portions 37. The lock receiving portion 39 is formed on the other side (lower portion in FIG. 4) of the concave surface portion 37.

ロック部３８は、棒状の連結ピン部３８Ａと、連結部の先端部にて外方に凸となるように形成される係止爪部３８Ｂと、を有する。
係止爪部３８Ｂは、先細となっており、先細となる外方側の面がテーパ面とされる。 The lock portion 38 includes a rod-like connecting pin portion 38A and a locking claw portion 38B formed to protrude outward at the distal end portion of the connecting portion.
The locking claw portion 38B is tapered, and a tapered outer surface is a tapered surface.

ロック受け部３９は、長方形の枠形をなし、内部に長方形状のロック孔３９Ａが貫通形成されている。ロック孔３９Ａの上下方向の寸法は、係止爪部３８Ｂの上下方向の寸法（係止爪部３８Ｂの厚み）よりもわずかに小さくなっている。 The lock receiving portion 39 has a rectangular frame shape, and a rectangular lock hole 39A is formed therethrough. The vertical dimension of the lock hole 39A is slightly smaller than the vertical dimension (the thickness of the locking claw 38B) of the locking claw 38B.

各係止爪部３８Ｂが各ロック孔３９Ａに挿入されると、ロック部３８の係止爪部３８Ｂが、枠形のロック受け部３９をわずかに撓ませつつロック孔３９Ａに進入していく。そして、係止爪部３８Ｂの全体がロック孔３９Ａを抜けると、図２に示すように、係止爪部３８Ｂの後縁がロック受け部３９に係止して単位チューブ３１の分割チューブ３１Ａ，３１Ａへの分離が規制される。 When each locking claw portion 38B is inserted into each lock hole 39A, the locking claw portion 38B of the lock portion 38 enters the lock hole 39A while slightly bending the frame-shaped lock receiving portion 39. When the entire locking claw portion 38B passes through the lock hole 39A, the rear edge of the locking claw portion 38B is locked to the lock receiving portion 39 as shown in FIG. Separation to 31A is regulated.

上記したように単位チューブ３１は、軸方向に沿った面で分割された二個の分割チューブ３１Ａ，３１Ａからなり、これら対になる分割チューブ３１Ａ，３１Ａは、同一形状となっている。
ここで、単位チューブ３１（分割チューブ３１Ａ，３１Ａ）の材質は、合成樹脂であって、例えば、PP（ポリプロピレン），PBT（ポリブチレンテレフタレート），PE（ポリエチレン），PET（ポリエチレンテレフタレート）等の熱可塑性樹脂を用いることができる。なお、熱硬化性樹脂等の他の合成樹脂を用いることも可能である。
そして、これら分割チューブ３１Ａ，３１Ａは、それぞれ射出成形により各分割チューブ３１Ａ，３１Ａごとに一体に成形される。 As described above, the unit tube 31 includes the two divided tubes 31A and 31A that are divided along the surface along the axial direction, and the divided tubes 31A and 31A that form a pair have the same shape.
Here, the material of the unit tube 31 (divided tubes 31A, 31A) is a synthetic resin, such as PP (polypropylene), PBT (polybutylene terephthalate), PE (polyethylene), PET (polyethylene terephthalate) or the like. A plastic resin can be used. It is also possible to use other synthetic resins such as thermosetting resins.
The divided tubes 31A and 31A are integrally formed for each of the divided tubes 31A and 31A by injection molding.

次に、連結部材４０について説明する。
連結部材４０は、図１に示すように、連結単位チューブ３０の前端側（一端側）に接続される凹状面部付連結部材４１と、連結単位チューブ３０の後端側（他端側）に接続される曲面部付連結部材４８と、からなる。
凹状面部付連結部材４１は、連結単位チューブ３０のうち、その長さ方向の端部が曲面部３５である前端側に連結されるものであり、図５に示すように、概ね円筒形状をなす。また、凹状面部付連結部材４１は、図６に示すように、軸方向に沿った面で分割（半割）した一対の分割連結部材４１Ａ，４１Ａからなり、軸方向の前部にて、筒状プロテクタ２０に連結されるプロテクタ接続部４３と、軸方向の後部にて、曲面部３５に摺動可能に連結される連結用凹状面部４２と、を有する。 Next, the connecting member 40 will be described.
As shown in FIG. 1, the connecting member 40 is connected to the connecting member 41 with a concave surface portion connected to the front end side (one end side) of the connecting unit tube 30 and the rear end side (the other end side) of the connecting unit tube 30. And a connecting member 48 with a curved surface portion.
The connecting member 41 with a concave surface portion is connected to the front end side of the connecting unit tube 30 in the length direction, which is the curved surface portion 35, and has a substantially cylindrical shape as shown in FIG. . Further, as shown in FIG. 6, the connecting member 41 with a concave surface portion is composed of a pair of divided connecting members 41A and 41A divided (halved) by a surface along the axial direction. A protector connecting portion 43 connected to the cylindrical protector 20 and a connecting concave surface portion 42 slidably connected to the curved surface portion 35 at the rear portion in the axial direction.

プロテクタ接続部４３は、分割プロテクタ本体部２３が収容される収容部４４と、筒状プロテクタ２０の係止凸部２７が係止される係止凹部４５と、を有する。
収容部４４は、分割プロテクタ本体部２３の外形と同じ半円形状をなす。
係止凹部４５は、分割連結部材４１Ａの分割端面４１Ｂのうち、収容部４４の奥端部の部分を係止凸部２７の厚み分だけ切欠いて設けられている。 The protector connecting portion 43 includes a housing portion 44 in which the divided protector main body portion 23 is accommodated, and a locking concave portion 45 in which the locking convex portion 27 of the cylindrical protector 20 is locked.
The accommodating portion 44 has the same semicircular shape as the outer shape of the divided protector main body portion 23.
The locking recess 45 is provided by cutting out the portion of the rear end portion of the accommodating portion 44 in the divided end surface 41B of the divided connecting member 41A by the thickness of the locking projection 27.

プロテクタ接続部４３の円形の外周には、環状の凸部４６が形成されている。この凸部４６は、例えば、電線保護管１０の組み付け装置に連結部材４１，４８をセットする際の位置決めに用いることができる。なお、本実施形態では、前記組み付け装置ではなく、後述する組み付け治具８０を用いて組み付ける例を説明する。
連結用凹状面部４２は、凹状面部３７と同一形状である。 An annular convex portion 46 is formed on the circular outer periphery of the protector connection portion 43. This convex part 46 can be used for positioning at the time of setting the connection members 41 and 48 to the assembly apparatus of the electric wire protection tube 10, for example. In the present embodiment, an example in which an assembly jig 80 described later is used instead of the assembly apparatus will be described.
The connecting concave surface portion 42 has the same shape as the concave surface portion 37.

分割連結部材４１Ａのうち、連結用凹状面部３７とプロテクタ接続部４３との間には仕切り壁４７が設けられており、この仕切り壁４７の上部には半円形の電線挿通孔５１が形成されている。電線挿通孔５１の径（半円の半径）は、電線７０の径にほぼ等しいため、電線７０を挿通して分割連結部材４１Ａ，４１Ａを嵌め合わせると電線７０の外周が電線挿通孔５１に密着する。 A partition wall 47 is provided between the connecting concave surface portion 37 and the protector connection portion 43 in the divided connection member 41 A, and a semicircular electric wire insertion hole 51 is formed on the upper portion of the partition wall 47. Yes. Since the diameter of the electric wire insertion hole 51 (the radius of the semicircle) is substantially equal to the diameter of the electric wire 70, the outer periphery of the electric wire 70 is in close contact with the electric wire insertion hole 51 when the electric wire 70 is inserted and the divided connecting members 41 A and 41 A are fitted. To do.

曲面部付連結部材４８は、連結単位チューブ３０のうち、その長さ方向の端部が凹状面部３７である後端側に連結されるものであり、図９に示すように、概ね円筒形状をなす。また、曲面部付連結部材４８は、図１０に示すように、軸方向に沿った面で分割（半割）した一対の分割連結部材４８Ａ，４８Ａからなり、軸方向の中間部にて電線７０を保持する電線保持部５２と、電線保持部５２の前方側にて電線保持部５２と連続し凹状面部３７に摺動可能に連結される連結用曲面部４９と、電線保持部５２の後方側にて電線保持部５２と連続し筒状プロテクタ２０に連結されるプロテクタ接続部５３と、を有する。 The connecting member 48 with a curved surface portion is connected to the rear end side of the connecting unit tube 30 whose end in the length direction is a concave surface portion 37, and has a generally cylindrical shape as shown in FIG. Eggplant. Further, as shown in FIG. 10, the connecting member 48 with the curved surface portion is composed of a pair of divided connecting members 48A and 48A divided (halved) along the surface along the axial direction, and the electric wire 70 is formed at the intermediate portion in the axial direction. An electric wire holding part 52 for holding the wire, a connecting curved surface part 49 which is continuous with the electric wire holding part 52 on the front side of the electric wire holding part 52 and is slidably connected to the concave surface part 37, and a rear side of the electric wire holding part 52 And a protector connecting portion 53 that is continuous with the electric wire holding portion 52 and is connected to the cylindrical protector 20.

連結用曲面部４９は、単位チューブ３１の曲面部３５と同一形状であり、電線保持部５２は、単位チューブ３１の電線保持部３２と同一形状である。 The connecting curved surface portion 49 has the same shape as the curved surface portion 35 of the unit tube 31, and the electric wire holding portion 52 has the same shape as the electric wire holding portion 32 of the unit tube 31.

プロテクタ接続部５３は、分割プロテクタ本体部２３が収容される収容部５４と、筒状プロテクタ２０の係止凸部２７が係止される係止凹部５５と、を有する。
収容部５４は、分割プロテクタ本体部２３の外形と同じ半円形状をなす。
係止凹部５５は、分割連結部材４８Ａの分割端面４８Ｂのうち、収容部４４の奥端部の部分を係止凸部２７の厚み分だけ切欠いて設けられている。 The protector connecting portion 53 has a housing portion 54 in which the divided protector main body portion 23 is accommodated, and a locking recess 55 in which the locking projection 27 of the cylindrical protector 20 is locked.
The accommodating portion 54 has the same semicircular shape as the outer shape of the divided protector main body portion 23.
The locking recess 55 is provided by cutting out the portion of the rear end portion of the accommodating portion 44 in the split end surface 48B of the split connecting member 48A by the thickness of the locking projection 27.

プロテクタ接続部５３の円形の外周には、環状の凸部５６が形成されている。この凸部５６は、例えば、電線保護管１０の組み付け装置に連結部材４１，４８をセットする際の位置決めに用いることができる。 An annular convex portion 56 is formed on the circular outer periphery of the protector connection portion 53. This convex part 56 can be used for positioning at the time of setting the connection members 41 and 48 to the assembly apparatus of the electric wire protection tube 10, for example.

分割連結部材４８Ａのうち、電線保持部５２とプロテクタ接続部４３との間には仕切り壁５７が設けられており、この仕切り壁５７には半円形の電線挿通孔６１が形成されている。電線挿通孔６１の径（半円の半径）は、電線７０の径にほぼ等しいため、電線７０を挿通して分割連結部材４８Ａ，４８Ａを嵌め合わせると電線７０の外周が電線挿通孔６１に密着する。 A partition wall 57 is provided between the electric wire holding portion 52 and the protector connection portion 43 in the divided connecting member 48 A, and a semicircular electric wire insertion hole 61 is formed in the partition wall 57. Since the diameter of the electric wire insertion hole 61 (the radius of the semicircle) is substantially equal to the diameter of the electric wire 70, the outer periphery of the electric wire 70 is brought into close contact with the electric wire insertion hole 61 when the electric wire 70 is inserted and the divided connecting members 48A and 48A are fitted together. To do.

次に、電線保護管１０の組み付け治具８０について説明する。
組み付け治具８０は、図１３に示すように、金属板材からなる基台部８１と、電線７０を挟み込んで位置決めする電線挟持部８５と、を有し、これらが奥端部にてヒンジ機構８９で接続されることにより、電線挟持部８５が奥端部を軸として回動可能に構成されている。 Next, the assembly jig 80 for the wire protection tube 10 will be described.
As shown in FIG. 13, the assembling jig 80 includes a base portion 81 made of a metal plate material, and an electric wire clamping portion 85 that sandwiches and positions the electric wire 70, and these are hinge mechanisms 89 at the back end portion. In this way, the electric wire holding part 85 is configured to be rotatable about the back end part as an axis.

基台部８１は、上面が長方形状であって、作業者側からみた前後方向（図１３の左右方向）の中間部には、電線７０が載置される載置凹部８２がこの基台部８１の全幅（電線７０の長さ方向の全長）に亘って形成されている。
基台部８１の幅は、複数の連結単位チューブ３０及び連結部材４０を連結した長さとされる。
基台部８１の前部には、作業者が掴むための棒状の把持部８３が設けられている。 The base part 81 has a rectangular upper surface, and a mounting recess 82 in which the electric wire 70 is placed is provided at the intermediate part in the front-rear direction (left-right direction in FIG. 13) viewed from the operator side. It is formed over the entire width 81 (the total length in the length direction of the electric wire 70).
The width of the base portion 81 is a length obtained by connecting the plurality of connecting unit tubes 30 and the connecting member 40.
A bar-shaped gripping portion 83 for an operator to grip is provided at the front portion of the base portion 81.

電線挟持部８５は、基台部８１の幅方向の中心に基台部８１の幅に対して短い幅で設けられており、その側面が長方形状をなし、電線７０を挟み込むための半円形状の挟持凹部８６を有する。この電線挟持部８５により、組み付け時に電線７０が位置ずれしないように基台部８１側に電線７０を押し付けて挟持することができる。
電線挟持部８５の前部には、作業者が掴むための棒状の把持部８７が設けられている。 The electric wire clamping portion 85 is provided at the center in the width direction of the base portion 81 with a width shorter than the width of the base portion 81, and its side surface is rectangular and has a semicircular shape for sandwiching the electric wire 70. The holding recess 86 is provided. By this electric wire clamping part 85, the electric wire 70 can be pressed and clamped to the base part 81 side so that the electric wire 70 may not be displaced during assembly.
A bar-shaped gripping portion 87 for the operator to grip is provided at the front portion of the electric wire clamping portion 85.

次に、組み付け治具８０を使用した組み付け方法について説明する。
作業者は、図１４に示すように、組み付け治具８０の基台部８１の載置凹部８２に電線７０を載置し、可撓性を持たせたい部分の中心部を電線挟持部８５を押し下げて、基台部８１と電線挟持部８５との間に挟み込む。これにより、保護される電線７０の中心部が挟持される。 Next, an assembling method using the assembling jig 80 will be described.
As shown in FIG. 14, the operator places the electric wire 70 in the placement concave portion 82 of the base portion 81 of the assembling jig 80, and sets the electric wire clamping portion 85 at the center of the portion to be made flexible. Press down and sandwich between the base part 81 and the electric wire holding part 85. Thereby, the center part of the electric wire 70 to be protected is clamped.

次に、図１５に示すように、筒状プロテクタ２０の分割プロテクタ２２をその端部が基台部８１の幅方向の一方の端面８１Ａに突き当たるように取り付けるとともに、これと対になる分割プロテクタ２２を前記一方の端面８１Ａに突き当たる位置で被せて筒状プロテクタ２０とする。 Next, as shown in FIG. 15, the split protector 22 of the cylindrical protector 20 is attached so that the end thereof abuts against one end face 81 A in the width direction of the base portion 81, and the split protector 22 paired therewith. Is covered at a position where it abuts against the one end face 81 A to form a cylindrical protector 20.

同様に、反対側についても、筒状プロテクタ２０の分割プロテクタ２２をその端部が基台部８１の幅方向の他方の端面８１Ｂに突き当たるように取り付けるとともに、これと対になる分割プロテクタ２２を前記他方の端面８１Ｂに突き当たる位置で被せて筒状プロテクタ２０とする。 Similarly, also on the opposite side, the split protector 22 of the cylindrical protector 20 is attached so that the end of the split protector 22 abuts against the other end surface 81B in the width direction of the base 81, and the split protector 22 paired with the split protector 22 The cylindrical protector 20 is formed by covering it at a position where it abuts against the other end surface 81B.

そして、筒状プロテクタ２０の重ね合わされた張出部２４（被溶着部２８）の部分を挟み込んで溶着する。これにより、筒状プロテクタ２０の筒部３３の内周面（電線挿通孔２１）に電線７０が密着した状態となり、筒状プロテクタ２０は軸方向にずれることなく電線７０に固着された状態となる。 And the part of the overhang | projection part 24 (to-be-welded part 28) with which the cylindrical protector 20 was piled up is inserted | pinched, and it welds. Thereby, the electric wire 70 is brought into close contact with the inner peripheral surface (the electric wire insertion hole 21) of the cylindrical portion 33 of the cylindrical protector 20, and the cylindrical protector 20 is fixed to the electric wire 70 without being displaced in the axial direction. .

次に、図１６に示すように、組み付け治具８０について電線挟持部８５を上げて電線挟持部８５による挟持を解除するとともに、組み付け治具８０を取り外す。 Next, as shown in FIG. 16, the electric wire holding portion 85 is lifted with respect to the assembling jig 80 to release the holding by the electric wire holding portion 85 and the assembling jig 80 is removed.

そして、図１７に示すように、分割連結部材４８Ａ，４８Ａを嵌め合わせて曲面部付連結部材４８を取り付けてから、隣接する各単位チューブ３１について、順番にロック部３８とロック受け部３９とをロックさせて分割チューブ３１Ａ，３１Ａを嵌め合わせいく。最後に、分割連結部材４１Ａ，４１Ａを嵌め合わせて凹状面部付連結部材４１が取り付けられると、図１８に示すように、電線７０の挿通された電線保護管１０が完成する。なお、単位チューブ３１や連結部材４０の取り付けに先立って、電線７０の外周にグリースや樹脂（例えば、シリコン系の樹脂）を塗布し、隙間（空気層）をなくして放熱性を更に向上させるようにしてもよい。
そして、このようにして組み付けられた電線保護管１０は、図１９に示すように、連結単位チューブ３０の部分により、車内等の配索する場所の形状に応じて曲げることができる。 Then, as shown in FIG. 17, the divided connecting members 48 A and 48 A are fitted to each other and the connecting member 48 with the curved surface portion is attached, and then the lock unit 38 and the lock receiving unit 39 are sequentially connected to each adjacent unit tube 31. The divided tubes 31A and 31A are fitted together by locking. Finally, when the connecting members 41 having concave surface portions are attached by fitting the divided connecting members 41A and 41A, the electric wire protection tube 10 through which the electric wires 70 are inserted is completed as shown in FIG. Prior to the attachment of the unit tube 31 and the connecting member 40, grease or resin (for example, silicon-based resin) is applied to the outer periphery of the electric wire 70 to eliminate the gap (air layer) and further improve heat dissipation. It may be.
And the electric wire protection tube 10 assembled | attached in this way can be bent by the part of the connection unit tube 30 according to the shape of the place to route, such as the inside of a vehicle, as shown in FIG.

本実施形態によれば、以下の効果を奏する。
（１）内部に電線７０が挿通される筒状プロテクタ２０と、筒状プロテクタ２０とは異なる位置にて複数の単位チューブ３１が連結され、その内部に電線７０が挿通される連結単位チューブ３０と、を有する電線保護管１０は、各単位チューブ３１は、電線７０が挿通される電線挿通孔２１を有した筒部３３と、筒部３３に連なり、曲面状の外周面を有する曲面部３５と、曲面部３５とは反対側にて筒部３３に連なり、隣接する単位チューブ３１の曲面部３５と嵌り合ってその曲面部３５の外周面に対して摺動する凹状面部３７と、を備える。
このような電線保護管１０に電線７０が挿通されることにより、電線７０を外部からの強い衝撃等から保護できる。また、連結単位チューブ３０は、単位チューブ３１の曲面部３５とこれと隣接する単位チューブ３１の凹状面部３７とが嵌り合ってその曲面部３５の外周面に対して摺動するから、連結単位チューブ３０を有する電線保護管１０は、連結単位チューブ３０の位置で曲げることができる。即ち、可撓性を有し、かつ、強度の強い電線保護管１０とすることができる。 According to this embodiment, the following effects can be obtained.
(1) A cylindrical protector 20 into which the electric wire 70 is inserted, and a plurality of unit tubes 31 connected at positions different from the cylindrical protector 20, and a connected unit tube 30 into which the electric wire 70 is inserted. , Each unit tube 31 includes a cylindrical portion 33 having a wire insertion hole 21 through which the electric wire 70 is inserted, and a curved portion 35 having a curved outer peripheral surface connected to the cylindrical portion 33. And a concave surface portion 37 that is continuous with the cylindrical portion 33 on the opposite side to the curved surface portion 35 and fits with the curved surface portion 35 of the adjacent unit tube 31 and slides on the outer peripheral surface of the curved surface portion 35.
By inserting the electric wire 70 into the electric wire protection tube 10, the electric wire 70 can be protected from a strong impact from the outside. Moreover, since the curved surface part 35 of the unit tube 31 and the concave surface part 37 of the unit tube 31 which adjoins this are connected, the connection unit tube 30 slides with respect to the outer peripheral surface of the curved surface part 35, Therefore The wire protection tube 10 having 30 can be bent at the position of the connecting unit tube 30. That is, the electric wire protection tube 10 having flexibility and high strength can be obtained.

なお、可撓性を有しつつ電線７０を保護するという点では、電線保護管１０の全ての部分を連結単位チューブ３０で構成することも可能であるが、連結単位チューブ３０の部分については、可撓性を有するための構成により、筒状プロテクタ２０よりも体積が大きくなりやすく、その分重量が重くなりやすい。一方、本実施形態の構成によれば、可撓性を有する必要のある部分については、連結単位チューブ３０とし、可撓性を有する必要のない部分については、筒状プロテクタ２０により電線７０を保護するから、全てを連結単位チューブ３０とする場合よりも電線保護管１０を軽量化することができる。 In addition, in terms of protecting the electric wire 70 while having flexibility, it is possible to configure all the portions of the electric wire protection tube 10 with the connection unit tube 30, but for the portion of the connection unit tube 30, Due to the configuration for flexibility, the volume is likely to be larger than that of the cylindrical protector 20, and the weight is likely to increase accordingly. On the other hand, according to the configuration of the present embodiment, the connecting unit tube 30 is used for the portion that needs to be flexible, and the electric wire 70 is protected by the cylindrical protector 20 for the portion that does not need to be flexible. Therefore, the electric wire protection tube 10 can be reduced in weight as compared with the case where all the connection unit tubes 30 are used.

（２）連結単位チューブ３０と筒状プロテクタ２０とを連結する連結部材４０を有し、連結部材４０の一端側には、単位チューブ３１の曲面部３５と嵌り合ってその曲面部３５の外周面に対して摺動する連結用凹状面部４２又は単位チューブ３１の凹状面部３７と嵌り合ってその凹状面部３７の内周面に対して摺動する連結用曲面部４９が設けられるとともに、連結部材４０の他端側には、筒状プロテクタ２０に係止する係止凹部４５，５５（連結係止部）が設けられる。
このようにすれば、連結部材４０により連結単位チューブ３０と筒状プロテクタ２０とが連結されるから、連結単位チューブ３０と筒状プロテクタ２０とが離れて内部の電線７０が露出することを防止することができる。 (2) It has the connection member 40 which connects the connection unit tube 30 and the cylindrical protector 20, and it fits with the curved surface part 35 of the unit tube 31 on the one end side of the connection member 40, and the outer peripheral surface of the curved surface part 35 The connecting concave surface portion 42 or the connecting curved surface portion 49 that fits the concave surface portion 37 of the unit tube 31 and slides against the inner peripheral surface of the concave surface portion 37 is provided. On the other end side, locking recesses 45 and 55 (connection locking portions) for locking to the cylindrical protector 20 are provided.
If it does in this way, since the connection unit tube 30 and the cylindrical protector 20 are connected by the connection member 40, it will prevent that the connection unit tube 30 and the cylindrical protector 20 leave | separate, and the internal electric wire 70 will be exposed. be able to.

また、連結単位チューブ３０及び筒状プロテクタ２０の連結のための構成を連結部材４０に設けることにより、連結のために構成の異なる単位チューブ３１や筒状プロテクタ２０を別途用意する必要がないから、単位チューブ３１間や筒状プロテクタ２０間の構成を共通化することが可能になる。 Further, by providing the connecting member 40 with a configuration for connecting the connection unit tube 30 and the cylindrical protector 20, it is not necessary to separately prepare the unit tube 31 and the cylindrical protector 20 having different configurations for connection. It is possible to share the configuration between the unit tubes 31 and between the cylindrical protectors 20.

（３）筒状プロテクタ２０には、係止凸部２７が形成され、係止凸部２７が係止凹部４５，５５に係止されることにより筒状プロテクタ２０と連結部材４０とが連結されるから、簡易な構成で、比較的強固に筒状プロテクタ２０と連結部材４０とを連結することができる。 (3) The cylindrical protector 20 is formed with a locking projection 27, and the locking projection 27 is locked to the locking recesses 45 and 55, thereby connecting the cylindrical protector 20 and the connecting member 40. Therefore, the cylindrical protector 20 and the connecting member 40 can be connected relatively firmly with a simple configuration.

（４）各単位チューブ３１における筒部３３は、電線７０の外周が密着した状態で挿通されるとともに、曲面部３５は、筒部３３の電線挿通孔２１に連なり端部側の径が大きくなる撓み許容孔３６を有する。 (4) The cylindrical portion 33 in each unit tube 31 is inserted in a state where the outer periphery of the electric wire 70 is in close contact, and the curved surface portion 35 is connected to the electric wire insertion hole 21 of the cylindrical portion 33 and has a larger diameter on the end side. A deflection allowing hole 36 is provided.

例えば、コルゲートチューブを用いて電線７０を保護する場合には、通電時に電線７０から発生する熱は、電線７０からコルゲートチューブへと伝達されて、コルゲートチューブから外部に放散される。しかしながら電線７０とコルゲートチューブとの間には、空気層が存在する。この空気層は熱伝導率が比較的低いので、コルゲートチューブの内部に熱がこもって、電線７０が高温になってしまう。特に、自動車のインバータやモータなどの機器間に配される電線７０をコルゲートチューブで保護する場合には、電線７０から発生する熱が大きいため、電線７０が高温になることが懸念される。 For example, when the electric wire 70 is protected using a corrugated tube, the heat generated from the electric wire 70 during energization is transmitted from the electric wire 70 to the corrugated tube and is dissipated to the outside from the corrugated tube. However, an air layer exists between the electric wire 70 and the corrugated tube. Since this air layer has a relatively low thermal conductivity, heat is accumulated inside the corrugated tube, and the electric wire 70 becomes high temperature. In particular, when the electric wire 70 disposed between devices such as an inverter and a motor of a car is protected with a corrugated tube, the heat generated from the electric wire 70 is large, so there is a concern that the electric wire 70 becomes high temperature.

一方、本実施形態の構成によれば、各単位チューブ３１の筒部３３に電線７０の外周が密着した状態で挿通することにより、熱伝導性の悪い空気層を介さず、電線７０から生じた熱を筒部３３を介して外部に放散することができる。 On the other hand, according to the configuration of the present embodiment, the wire 70 is inserted through the cylindrical portion 33 of each unit tube 31 in a state where the outer periphery of the wire 70 is in close contact with each other, and is generated from the wire 70 without an air layer having poor thermal conductivity. Heat can be dissipated to the outside through the cylindrical portion 33.

また、筒部３３について電線７０を密着させた場合に、曲面部３５についても筒部３３と同様に電線７０を密着させることにすると、電線７０の遊びがなくなり、単位チューブ３１の連結部分を屈曲させることが困難になるばかりでなく、無理に屈曲させると、電線７０が傷つくおそれがある。 Further, when the electric wire 70 is brought into close contact with the cylindrical portion 33, if the electric wire 70 is brought into close contact with the curved surface portion 35 in the same manner as the cylindrical portion 33, play of the electric wire 70 is eliminated and the connecting portion of the unit tube 31 is bent. Not only is it difficult to do this, but there is a risk that the wire 70 will be damaged if it is bent forcibly.

一方、本実施形態の構成のように、電線挿通孔２１に連なり、端部側ほど径が大きくなる撓み許容孔３６を有するようにすれば、屈曲させる際の電線７０の遊びができ、連結部分の屈曲が容易になるだけでなく、屈曲の際に内部の電線７０を傷つけずに済む。 On the other hand, if it has the bending | flexion tolerance hole 36 which continues to the electric wire insertion hole 21 like the structure of this embodiment, and a diameter becomes large toward an edge part side, the play of the electric wire 70 at the time of bending can be performed, and a connection part In addition to facilitating bending, the internal electric wire 70 can be prevented from being damaged during bending.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
（１）上記実施形態では、筒状プロテクタ２０と連結単位チューブ３０とを連結部材４０により接続する構成としたが、連結部材４０を有さない電線保護管１０でもよい。この場合、粘着材等を用いて連結してもよいが、筒状プロテクタ２０と連結単位チューブ３０とが連結されていないものでもよい。例えば、上記実施形態のように電線挿通孔２１に電線７０が密着するように挿通することで、筒状プロテクタ２０や連結単位チューブ３０の位置がずれないようにしてもよい。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said embodiment, although the cylindrical protector 20 and the connection unit tube 30 were connected by the connection member 40, the electric wire protection tube 10 which does not have the connection member 40 may be sufficient. In this case, although it may connect using an adhesive material etc., the cylindrical protector 20 and the connection unit tube 30 may not be connected. For example, the positions of the cylindrical protector 20 and the connecting unit tube 30 may be prevented from shifting by inserting the electric wire 70 so that the electric wire 70 is in close contact with the electric wire insertion hole 21 as in the above embodiment.

（２）組み付け治具８０の基台部８１の幅は、連結単位チューブ３０及び連結部材４０の長さとしたが、連結部材４０を有さない電線保護管１０とする場合には、基台部８１の幅を、連結単位チューブ３０の幅とした組み付け治具を用いることができる。 (2) The width of the base portion 81 of the assembling jig 80 is the length of the connecting unit tube 30 and the connecting member 40. However, when the wire protection tube 10 does not have the connecting member 40, the base portion An assembling jig in which the width of 81 is the width of the connecting unit tube 30 can be used.

１０…電線保護管
２０…筒状プロテクタ
２７…係止凸部
３０…連結単位チューブ
３１…単位チューブ
３３…筒部
３５…曲面部
３６…撓み許容孔
３７…凹状面部
４０…連結部材
４１…凹状面部付連結部材
４２…連結用凹状面部
４５…係止凹部（連結係止部）
４８…曲面部付連結部材
４９…連結用曲面部
７０…電線 DESCRIPTION OF SYMBOLS 10 ... Electric wire protection tube 20 ... Cylindrical protector 27 ... Locking convex part 30 ... Connection unit tube 31 ... Unit tube 33 ... Tube part 35 ... Curved part 36 ... Deflection allowable hole 37 ... Concave surface part 40 ... Connection member 41 ... Concave surface part With connecting member 42 ... concave surface portion for connection 45 ... locking recess (connection locking portion)
48 ... Connecting member with curved surface part 49 ... Curved surface part for connection 70 ... Electric wire

Claims

A wire protector comprising: a cylindrical protector into which an electric wire is inserted; and a connecting unit tube into which a plurality of unit tubes are connected at different positions from the cylindrical protector and into which the electric wire is inserted. And
Each unit tube is
A cylindrical portion having an electric wire insertion hole through which the electric wire is inserted;
A curved surface portion connected to the cylindrical portion and having a curved outer peripheral surface;
A concave surface portion that is continuous with the cylindrical portion on the side opposite to the curved surface portion, fits with the curved surface portion of an adjacent unit tube, and slides with respect to the outer peripheral surface of the curved surface portion. Electric wire protection tube.

A connecting member that connects the connecting unit tube and the cylindrical protector, and is fitted to the curved surface portion of the unit tube on one end side of the connecting member and slides on the outer peripheral surface of the curved surface portion; The connecting concave surface portion or the connecting curved surface portion that fits with the concave surface portion of the unit tube and slides against the inner peripheral surface of the concave surface portion is provided, and on the other end side of the connecting member The electric wire protective tube according to claim 1, further comprising a connection locking portion that locks the cylindrical protector.

The connection locking portion is a locking recess, and the cylindrical protector is formed with a locking projection, and the locking projection is locked to the locking recess, The wire protection tube according to claim 2, wherein the connection member is connected.

The cylindrical portion in each unit tube is
While being inserted with the outer periphery of the wire in close contact,
The curved surface portion is
The electric wire protection tube according to any one of claims 1 to 3, wherein the electric wire protection tube has a bending allowance hole that is continuous with the electric wire insertion hole of the cylindrical portion and has a larger diameter on the end portion side.