JP3702986B2

JP3702986B2 - Flexible hose with conductor

Info

Publication number: JP3702986B2
Application number: JP31110797A
Authority: JP
Inventors: 徳二郎林
Original assignee: Tigers Polymer Corp
Current assignee: Tigers Polymer Corp
Priority date: 1997-10-27
Filing date: 1997-10-27
Publication date: 2005-10-05
Anticipated expiration: 2016-09-11
Also published as: JPH10153279A

Description

【０００１】
【発明の属する技術分野】
本発明は、パワーブラシ用やリモコンスイッチ用などの電気回路を構成する
電気掃除機用ホース等に使用される導線付き可撓性ホースに関するものである。
【０００２】
【従来の技術】
従来、上記の導線付き可撓性ホースとしては、例えば特開平４−１２５３８３号に記載のものが知られている。このホースは、図７に示すように、ストリップ４１が螺旋状に捲回されて構成されるが、このストリップ４１は横断面が中空の略倒立Ｕ形状とされてホースの径方向外方に突出するとともに、ストリップ４１の幅方向に並設された３条の突条４２，４３，４４と、一方の外側の突条４４からストリップ４１の外側方に突設された底壁４５と、底壁４５の外側端部からホースの径方向外方に突設された接合部４６を有し、隣接する突条４２，４３，４４間はホースの径方向外方に開口する一対の導線挿入部４７，４８とされ、これら導線挿入部４７，４８に導線４９，５０が挿入されてその開口５１が接着剤５２，５３により施蓋され、また、接合部４６がホースの隣接する捲回部における外側の突条４２内に挿入されて接着剤５４で接合されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記のホースにおいては、隣接する突条４２，４３，４４間に導線挿入部４７，４８のスペースを設ける必要があり、ホースの長さ方向における単位長さ当たりの突条の数を多くすることはできず、ホースの可撓性の向上を図るのに限界があった。また、隣接する突条４２，４３，４４同士が接着剤で接着されているため、中央の突条４３における接着剤５２，５３より下方側と、外側の各突条４２，４４の内側壁における接着剤５２，５３より下方側の自由な変形が阻害されて、可撓性が制限される問題があった。本発明は、上記ホースの問題点を解消し、可撓性をより向上させることのできる導線付きホースを提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明は、上記の目的を達成するため、導線が付設された幅広の条帯を螺旋状に捲回し、その隣接する側縁部同士を重合して接合することによりホースを形成するものであって、上記条帯はその基部から立ち上がり横断面が中空の略逆三角形状をした突条部を幅方向に沿って複数形成されるとともに、隣接する突条部同士で形成する空間に基部から突設した導線保持壁により導線が保持される導線付設部が形成され、上記条帯を螺旋状に捲回してホース状体に形成した際の導線付設部の外径を突条部の外径よりも小さく構成し、かつ、上記突条部の頂壁部の剛性を他の部分より大きくして導線付き可撓性ホースを形成するものである。
【０００６】
また、突条部の頂壁部の内周面に条帯よりも硬質の合成樹脂芯を一体付設して上記の導線付き可撓性ホースを形成するものである。
【０００７】
以下、本発明の第１実施例を図１乃至図４の図面に基づき説明すると、導線付き可撓性ホースＡは、一対の被覆導線２，３が付設された幅広の条帯１が螺旋状に捲回されその隣接する側縁部同士が接合されて形成されている。
【０００８】
すなわち、条帯１は、基部４から立ち上がり横断面が中空の略逆三角形状をした複数（本例では３条）の突条部５，６，７と突条部５，６，７相互の隣接する空間に基部４から突設した左右一対の導線保持壁９，９により被覆導線２，３を保持する導線付設部８を有し、突条部５，６，７の頂壁部１０，１０，１０を硬質合成樹脂、その他の部分を軟質合成樹脂により一体に形成されている。
【０００９】
突条部５，６，７は、ホースの径方向外方に突出するとともに、条帯１の幅方向に併設され、それらの横断面は、ホースの径方向内方に開口する中空の略逆三角形状とされ、頂壁部１０と左右一対の側壁部１１，１２を有し、上端部の幅Ｘが下端部の幅Ｙよりも大とされている。
【００１０】
条帯１のうち突条部５，６，７の頂壁部１０，１０，１０を形成する硬質合成樹脂とそれ以外の部分を形成する軟質合成樹脂とは、互いに融着する材料が選択され、例えば硬質合成樹脂として高密度ポリエチレン、軟質合成樹脂としてエチレン酢酸ビニル共重合体（ＥＶＡ）使用される。
【００１１】
基部４は隣接する突条部５，６，７の下端部間を連結しており、この基部４からホースの径方向外方に突設された導線付設部８は、上端で開口しており、この開口部１７から内部に被覆導線２，３が挿入されるとともに、開口部１７が接着剤１８の充填により閉鎖される。
【００１２】
導線付設部８を構成する左右の導線保持壁９，９は、外側に膨らむ略く形状とされて、高さ方向略中央部の幅ｃが最大とされ、この幅ｃよりも下端部の幅ｄが小とされている。
【００１３】
また、接着剤１８を含む導線付設部８全体の上端は、突条部５，６，７の上端よりも低く形成されている。
【００１４】
条帯１の一側縁には突条部５に連設する基部４から突設された下向き側縁部１４、他側縁には突条部７に連接する基部４から突設された上向き側縁部１５が形成され、隣接する下向き側縁部１４と上向き側縁部１５がオーバーラップされるとともに、接着剤１６により接合されている。
【００１５】
接合された下向き側縁部１４と上向き側縁部１５により、ホースの径方向外方に突出する接合部の凸部１３が形成され、この凸部１３の最大幅ｅおよび最大高さｆは、導線付設部８の最大幅ｃおよび最大高さｇと略同一とされて、両者の形状は類似のものとされている。
【００１６】
上記のように構成した第１実施例によれば、ホースを製造する場合には、条帯１の導線保持壁９，９内に開口部１７から被覆導線２，３を挿入するとともに、この開口部１７を接着剤１８により閉鎖したうえ、このようにした条帯１を図示しない成形ローラに巻き付けながら螺旋状に捲回する。
【００１７】
そして、条帯１の上向き側縁部１５を隣接する下向き側縁部１４内に挿入し、接着剤１８と同一の接着剤である接合用接着剤１６により接合する。
上記のように、隣接する突条部５，６，７はどの部分も接着剤で接合されず、自由な変形が可能でありホースの可撓性は良好である。
【００１８】
すなわち、ホースを曲げた際には、屈曲部の外周側では、図３に示すように、突条部５，６，７は幅方向に引っ張られその両側壁部１１，１２が拡開して、頂壁部１０が湾曲凹状となる四角形（台形）状に変形するとともに、基部４，４はそれとは逆に湾曲凸状に変形する。
【００１９】
また、屈曲部の内周側では、図４に示すように、突条部５，６，７は軸方向に圧縮されてその両側壁部１１，１２が閉じるとともに、その頂壁部１０および基部４，４はそれとは逆の湾曲形態で変形する。
【００２０】
上記のように、ホースを曲げた際に、外周側が伸長し内周側は縮小するが、突条部５，６，７の両側壁部１１，１２の開閉や基部４の湾曲により、伸縮に容易に対応して、ホースが座屈するように変形するので、ホースの可撓性は大きいものである。
【００２１】
また、突条部５，６，７の横断面が略逆三角形とされて、隣接する突条部５，６，７間の略台形状の空間内に被覆導線２，３を内有する導線付設部８が配設されたので、突条部５，６，７の横断面が門型である場合などに比べて、ホースの単位長さ当りの突条部の数を多く設定でき、この点からもホースの可撓性を大きくすることができる。
【００２２】
また、ホースの筒形状を維持するため螺旋状の硬鋼線を使用した場合、誤ってホースを踏んだ際に硬鋼線が塑性変形してホースが潰れたままとなるが、本発明のホースには硬鋼線を使用せず、弾性を有する合成樹脂によりすべて構成されているため、ホースを踏んでもホースは容易に元に戻り潰れたままとなることはない。
【００２３】
更に、ホースが床面やカーペットなどと直接接触する部分である突条部５，６，７の頂壁部１０，１０，１０を硬質合成樹脂で形成してあるので、その摩擦抵抗が少なく、ホースの移動が滑らかで掃除機の使い勝手が良くなるほか、この硬質合成樹脂が螺旋補強体の役目を果たし、ホースを屈曲させた際に、キンクしにくくなりホースの曲率半径をより小さくできる。
【００２４】
なお、本実施例のように、頂壁部１０全体を硬質合成樹脂で形成する必要はなく、少なくとも床面などと直接接触するその外表面のみを硬質合成樹脂で形成するようにしてもよい。
【００２５】
ところで、突条部５，６，７の頂壁部１０、基部４等の湾曲部分の許容される最小曲率半径が小であるほど、ホースの可撓性が大となるが、導線付設部８が形成されている基部４の変形が阻害されないようにする必要がある。
【００２６】
そのため、導線付設部８の下端部の幅ｄが、その最大幅である高さ方向略中央部の幅ｃよりも小とされて、導線付設部８と基部４の連結部分の幅ができるだけ小さくされ、基部４の変形が導線付設部８により阻害されにくいようにされている。
【００２７】
これにより、ホースを曲げた際に、基部４全体が略均一に湾曲し、全体の許容される最小曲率半径が小となるので、ホースの可撓性を更に大とできる。これを図６に示す比較例と対比すると、比較例では、導線付設部８の下端部の幅ｗが最大幅とされて、導線付設部８と基部４の連結部分２１の幅が大とされているが、これにより、基部４における導線付設部８の連結部分２１の変形が、導線付設部８により阻害されるために、連結部分２１の許容される最小曲率半径が大となり、基部４の両側端部２２のみ、許容される最小曲率半径が小となる。従って、基部４全体で考えた場合には、本発明と比較して許容される最小曲率半径が小とならず、ホースの可撓性が悪くなる。
【００２８】
また、本発明では、導線付設部８の上端（すなわち外径）が、突条部５，６，７の上端（すなわち外径）よりも低く（小さく）されているので、ホースの使用時に導線付設部８が地面や床などと直に接触して摩耗することもなく、導線付設部８内の被覆導線２，３を良好に保護できる。
【００２９】
更に、被覆導線２，３が挿入される導線付設部８を、条帯１の隣接する上向き側縁部１５と下向き側縁部１４を重合した接合部に対して、条帯１の幅方向に離間させたにもかかわらず、上記接合部の凸部１３の最大幅ｅと最大高さｆが導線付設部８のそれと略同一とされている。従って、ホース全体として、隣接する突条部５，６，７の間に形状が類似する導線付設部８と接合部の凸部１３のいずれかが規則正しく配設されることになり、ホースを握った際の感触が良いほか、ホースの外観体裁も良好である。
【００３０】
図５は、本発明の第２実施例を示すもので、突条部５，６，７の頂壁部１０が条帯１を形成する軟質合成樹脂たとえばＥＶＡで形成され、この頂壁部１０の内周面に硬質合成樹脂たとえば高密度ポリエチレンからなる補強芯１９を熱融着により接合一体化し、この補強芯１９により頂壁部１０の剛性を高め、ホース屈曲の際のキンクを防止し、ホースの曲率半径をより小さくしたものである。なお、上記以外の条帯１の構成は、第１実施例と同様なので、対応する部分は同一の符号で示しその説明を省略する。
【００３１】
【発明の効果】
本発明によれば、導線付きホースでありながら、その可撓性を従来より大幅に向上させることができ、かつ、誤ってホースを踏んでも永久変形せず容易に元の形状に復元でき、導線がホース内部にうまく保護収納され外部に露出したりする虞がないとともに、耐キンク性が向上され曲率半径をより小さくできる。また、ホースを床などに引きずった際の摩擦抵抗が少なく、操作性に優れるほか、外観体裁や手触りのよいホースも得ることができる。
【図面の簡単な説明】
【図１】本発明の第１実施例を示すホースの側面図である。
【図２】同ホース一部の縦側断面図である。
【図３】同ホースの屈曲状態を示す一部縦側断面図である。
【図４】同ホースの屈曲状態を示す一部縦側断面図である。
【図５】本発明の第２実施例を示すホースの一部縦側断面図である。
【図６】比較例を示すホースの一部縦側断面図である。
【図７】従来例を示すホースの一部縦側断面図である。
【符号の説明】
１…条帯
２，３…被覆導線
４…基部
５，６，７…突条部
８…導線付設部
９…導線保持壁
１０…頂壁部
１１，１２…側壁部
１３…凸部
１４…下向き側縁部
１５…上向き側縁部
１６…接着剤
１７…開口部
１８…接着剤
１９…補強芯[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible hose with a conductor used for a vacuum cleaner hose that constitutes an electric circuit such as a power brush or a remote control switch.
[0002]
[Prior art]
Conventionally, as the flexible hose with a conductive wire, for example, the one described in JP-A-4-125383 is known. As shown in FIG. 7, this hose is formed by spirally winding a strip 41. The strip 41 has a substantially inverted U shape with a hollow cross section and protrudes outward in the radial direction of the hose. In addition, three ridges 42, 43, 44 arranged in parallel in the width direction of the strip 41, a bottom wall 45 projecting outward from the strip 41 from one outer ridge 44, and a bottom wall A pair of conductor insertion portions 47 having a joint 46 projecting radially outward of the hose from the outer end of 45 and opening between the adjacent ridges 42, 43, 44 radially outward of the hose. , 48, the conductors 49, 50 are inserted into the conductor insertion portions 47, 48, the openings 51 are covered with adhesives 52, 53, and the joint portion 46 is outside the winding portion adjacent to the hose. Inserted into the ridge 42 and joined with an adhesive 54 There.
[0003]
[Problems to be solved by the invention]
However, in the above-described hose, it is necessary to provide a space for the conductor insertion portions 47, 48 between the adjacent ridges 42, 43, 44, and the number of ridges per unit length in the length direction of the hose is large. However, there was a limit to improving the flexibility of the hose. Moreover, since adjacent ridges 42, 43, and 44 are bonded to each other with an adhesive, the lower side of the ridges 52 and 53 in the center ridge 43 and the inner walls of the outer ridges 42 and 44 on the outer side. There was a problem that flexibility was restricted because free deformation below the adhesives 52 and 53 was hindered. An object of this invention is to provide the hose with a conducting wire which can eliminate the problem of the said hose and can improve flexibility more.
[0004]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention forms a hose by winding a wide strip provided with a conducting wire in a spiral manner, and polymerizing and joining adjacent side edges. The strip is formed from a plurality of protrusions having a substantially inverted triangular shape with a hollow cross section rising from the base portion along the width direction and protruding from the base portion into a space formed by adjacent protrusion portions. A conductor-attached portion for holding a conductor is formed by the provided conductor holding wall, and the outer diameter of the conductor-attached portion when the above-mentioned strip is spirally wound to form a hose-like body is larger than the outer diameter of the protrusion. And a flexible hose with a conductor is formed by making the rigidity of the top wall portion of the ridge portion larger than other portions.
[0006]
Further, the above-described flexible hose with a conducting wire is formed by integrally attaching a synthetic resin core harder than the strip to the inner peripheral surface of the top wall portion of the protruding portion.
[0007]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings of FIGS. 1 to 4. A flexible hose A with a conductive wire has a wide strip 1 with a pair of covered conductive wires 2 and 3 spirally formed. And the adjacent side edges are joined to each other.
[0008]
That is, the strip 1 rises from the base portion 4 and has a substantially inverted triangular shape with a hollow cross section (in this example, three strips), and the strips 5, 6, 7 and the strips 5, 6, 7 are mutually connected. It has a conductor-attached portion 8 for holding the covered conductors 2 and 3 by a pair of left and right conductor holding walls 9 and 9 projecting from the base portion 4 in an adjacent space, and the top wall portions 10 10 and 10 are integrally formed of a hard synthetic resin, and the other portions are integrally formed of a soft synthetic resin.
[0009]
The protrusions 5, 6 and 7 protrude outward in the radial direction of the hose and are provided side by side in the width direction of the strip 1, and their cross-sections are substantially reverse to the hollow opening inward in the radial direction of the hose. It has a triangular shape and has a top wall portion 10 and a pair of left and right side wall portions 11, 12, and the width X of the upper end portion is larger than the width Y of the lower end portion.
[0010]
In the strip 1, materials that are fused to each other are selected for the hard synthetic resin that forms the top wall portions 10, 10, and 10 of the protruding portions 5, 6, and 7 and the soft synthetic resin that forms other portions. For example, high-density polyethylene is used as a hard synthetic resin, and ethylene vinyl acetate copolymer (EVA) is used as a soft synthetic resin.
[0011]
The base 4 connects the lower ends of the adjacent ridges 5, 6, and 7, and the conductor-attached portion 8 that protrudes outward from the base 4 in the radial direction of the hose opens at the upper end. The covered conductors 2 and 3 are inserted into the opening 17 and the opening 17 is closed by filling the adhesive 18.
[0012]
The left and right conductor holding walls 9, 9 constituting the conductor-attached portion 8 are formed in a generally rectangular shape that bulges outward, and the width c at the substantially central portion in the height direction is maximized. d is small.
[0013]
Further, the upper end of the entire conductor-equipped portion 8 including the adhesive 18 is formed lower than the upper ends of the protrusions 5, 6, 7.
[0014]
On one side edge of the strip 1 is a downward side edge 14 projecting from the base 4 connected to the ridge 5, and on the other side edge is projected upward from the base 4 connected to the ridge 7. A side edge 15 is formed, and the adjacent downward side edge 14 and the upward side edge 15 are overlapped and joined by an adhesive 16.
[0015]
The jointed downward side edge portion 14 and upward side edge portion 15 form a convex portion 13 of the joint portion protruding outward in the radial direction of the hose, and the maximum width e and maximum height f of the convex portion 13 are: The maximum width c and the maximum height g of the conductor-attached portion 8 are substantially the same, and the shapes of both are similar.
[0016]
According to the first embodiment configured as described above, when the hose is manufactured, the covered conducting wires 2 and 3 are inserted into the conducting wire holding walls 9 and 9 of the strip 1 from the opening 17 and the opening is opened. The portion 17 is closed with an adhesive 18, and the strip 1 thus formed is wound spirally while being wound around a forming roller (not shown).
[0017]
Then, the upward side edge 15 of the strip 1 is inserted into the adjacent downward side edge 14 and joined by the joining adhesive 16 which is the same adhesive as the adhesive 18.
As described above, the adjacent protrusions 5, 6, and 7 are not joined by any adhesive, and can be freely deformed, and the flexibility of the hose is good.
[0018]
That is, when the hose is bent, on the outer peripheral side of the bent portion, as shown in FIG. 3, the ridges 5, 6, and 7 are pulled in the width direction and the both side walls 11 and 12 are expanded. The top wall portion 10 is deformed into a quadrangular (trapezoidal) shape having a curved concave shape, and the base portions 4 and 4 are deformed into a curved convex shape on the contrary.
[0019]
Further, on the inner peripheral side of the bent portion, as shown in FIG. 4, the protruding portions 5, 6, 7 are compressed in the axial direction to close the both side walls 11, 12, and the top wall 10 and the base 4 and 4 are deformed in the opposite curved form.
[0020]
As described above, when the hose is bent, the outer peripheral side expands and the inner peripheral side contracts, but it can be expanded and contracted by opening and closing the both side walls 11 and 12 of the ridges 5, 6 and 7 and by bending the base 4. Correspondingly easily, the hose is deformed to buckle, so the flexibility of the hose is great.
[0021]
Further, the cross sections of the ridges 5, 6 and 7 are substantially inverted triangles, and the conductors having the covered conductors 2 and 3 in the substantially trapezoidal space between the adjacent ridges 5, 6 and 7 are provided. Since the portion 8 is disposed, the number of protrusions per unit length of the hose can be set larger than in the case where the cross section of the protrusions 5, 6 and 7 is a gate type. Therefore, the flexibility of the hose can be increased.
[0022]
In addition, when a helical hard steel wire is used to maintain the cylindrical shape of the hose, the hard steel wire is plastically deformed when the hose is stepped on accidentally, and the hose remains crushed. Since a hard steel wire is not used for the, and it is entirely composed of a synthetic resin having elasticity, even if the hose is stepped on, the hose does not easily return to its original state and remain crushed.
[0023]
Furthermore, since the top wall portions 10, 10, and 10 of the ridge portions 5, 6, and 7, which are portions where the hose is in direct contact with the floor surface, carpet, etc., are formed of a hard synthetic resin, the frictional resistance thereof is small, In addition to the smooth movement of the hose and the ease of use of the vacuum cleaner, this hard synthetic resin serves as a spiral reinforcement, making it difficult to kink when the hose is bent, and the radius of curvature of the hose can be made smaller.
[0024]
Note that, as in the present embodiment, the entire top wall portion 10 does not need to be formed of a hard synthetic resin, and at least only the outer surface that is in direct contact with the floor surface or the like may be formed of a hard synthetic resin.
[0025]
By the way, the smaller the allowable minimum radius of curvature of the curved portions such as the top wall portion 10 and the base portion 4 of the protrusions 5, 6, 7 is, the greater the flexibility of the hose is. It is necessary to prevent the deformation of the base 4 on which is formed.
[0026]
Therefore, the width d of the lower end portion of the conductor-attached portion 8 is made smaller than the width c of the substantially central portion in the height direction, which is the maximum width, and the width of the connecting portion of the conductor-attached portion 8 and the base portion 4 is as small as possible. Thus, the deformation of the base portion 4 is made difficult to be hindered by the conductor-attached portion 8.
[0027]
As a result, when the hose is bent, the entire base portion 4 is bent substantially uniformly, and the allowable minimum radius of curvature of the whole becomes small, so that the flexibility of the hose can be further increased. In contrast to the comparative example shown in FIG. 6, in the comparative example, the width w of the lower end portion of the conductor-attached portion 8 is the maximum width, and the width of the connecting portion 21 between the conductor-attached portion 8 and the base portion 4 is increased. However, since the deformation of the connecting portion 21 of the conductor-attached portion 8 in the base 4 is hindered by the conductor-attached portion 8, the allowable minimum radius of curvature of the connecting portion 21 is increased. Only the side edges 22 have a small allowable radius of curvature. Accordingly, when considering the base 4 as a whole, the minimum radius of curvature allowed in comparison with the present invention is not small, and the flexibility of the hose deteriorates.
[0028]
In the present invention, the upper end (that is, the outer diameter) of the conductor-attached portion 8 is lower (smaller) than the upper ends (that is, the outer diameter) of the protrusions 5, 6, and 7, so that the conductor is used when the hose is used. The attached portion 8 does not come into direct contact with the ground or the floor and is not worn, and the coated conductors 2 and 3 in the attached portion 8 can be well protected.
[0029]
Further, the conductor-attached portion 8 into which the covered conductors 2 and 3 are inserted is arranged in the width direction of the strip 1 with respect to the joint portion obtained by superposing the adjacent upward side edge 15 and the downward side edge 14 of the strip 1. Despite being separated, the maximum width e and maximum height f of the projection 13 of the joint are substantially the same as those of the conductor-attached portion 8. Therefore, as a whole hose, either the conductor-attached portion 8 having a similar shape or the convex portion 13 of the joining portion is regularly arranged between the adjacent protrusions 5, 6, and 7, and the hose is gripped. In addition to a good feel when hit, the appearance of the hose is also good.
[0030]
FIG. 5 shows a second embodiment of the present invention. The top wall 10 of the ridges 5, 6, and 7 is formed of a soft synthetic resin that forms the strip 1 such as EVA, and the top wall 10 A reinforcing core 19 made of a hard synthetic resin, for example, high-density polyethylene is joined and integrated to the inner peripheral surface by heat fusion, the rigidity of the top wall portion 10 is increased by this reinforcing core 19, and kinking at the time of bending the hose is prevented. The hose has a smaller radius of curvature. In addition, since the structure of the strip 1 other than the above is the same as that of 1st Example, the corresponding part is shown with the same code | symbol and the description is abbreviate | omitted.
[0031]
【The invention's effect】
According to the present invention, although it is a hose with a conductor, its flexibility can be significantly improved compared to the conventional one, and even if the hose is stepped on by mistake, it can be easily restored to its original shape without permanent deformation. Is well protected and housed inside the hose and is not exposed to the outside, and kink resistance is improved and the radius of curvature can be further reduced. In addition, there is little frictional resistance when the hose is dragged to the floor, etc., and it is excellent in operability, and a hose with good appearance and touch can be obtained.
[Brief description of the drawings]
FIG. 1 is a side view of a hose showing a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a part of the hose.
FIG. 3 is a partial longitudinal sectional view showing a bent state of the hose.
FIG. 4 is a partial vertical sectional view showing a bent state of the hose.
FIG. 5 is a partial longitudinal sectional view of a hose showing a second embodiment of the present invention.
FIG. 6 is a partial vertical sectional view of a hose showing a comparative example.
FIG. 7 is a partial vertical sectional view of a hose showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Strip | belt 2, 3 ... Coated conducting wire 4 ... Base part 5, 6, 7 ... Projection part 8 ... Conductor attaching part 9 ... Conductor holding wall 10 ... Top wall part 11, 12 ... Side wall part 13 ... Convex part 14 ... Downward Side edge 15 ... Upward side edge 16 ... Adhesive 17 ... Opening 18 ... Adhesive 19 ... Reinforcing core

Claims

A flexible hose formed by spirally winding a wide strip with a conductive wire and polymerizing and joining adjacent side edges of the strip, the strip rising from the base and crossing A plurality of protrusions having a substantially inverted triangular shape with a hollow surface are formed along the width direction, and the conductor is held by a conductor holding wall protruding from the base in a space formed by adjacent protrusions. A conductor-provided portion is formed, and the outer diameter of the conductor-provided portion is smaller than the outer diameter of the ridge when the strip is spirally wound to form a hose-like body, and the ridge A flexible hose with a conducting wire, characterized in that the rigidity of the top wall portion is made larger than that of other portions.

The flexible hose with conducting wire according to claim 1, wherein a synthetic resin core harder than the strip is integrally attached to the inner peripheral surface of the top wall portion of the protrusion.