JPWO2017065276A1 - Double hose - Google Patents

Double hose Download PDF

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JPWO2017065276A1
JPWO2017065276A1 JP2017545486A JP2017545486A JPWO2017065276A1 JP WO2017065276 A1 JPWO2017065276 A1 JP WO2017065276A1 JP 2017545486 A JP2017545486 A JP 2017545486A JP 2017545486 A JP2017545486 A JP 2017545486A JP WO2017065276 A1 JPWO2017065276 A1 JP WO2017065276A1
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wire
reinforcing core
double hose
inner tube
tube
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JP6427686B2 (en
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一行 南
一行 南
寛文 宇賀
寛文 宇賀
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Totaku Industries Inc
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Totaku Industries Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

可撓性を確保しながらも、内管と外管との間への異物の侵入を抑制でき、さらにホース接続部において良好な止水性が得られる二重ホースを提供する。軟質樹脂製の内管(１０)と、軟質樹脂製の外管(１１)とからなる二重ホースであって、内管(１０)と外管(１１)との間に、管軸方向に間隔をあけて螺旋巻回される補強芯(１２)を設け、この補強芯(１２)は内管(１０)及び外管(１１)とに固着され、これら隣接する補強芯(１２、１２)間の空間(１３)に沿って、圧縮変形可能な線材(１４)を遊嵌状に配置し、この線材(１４)は、応力により前記補強芯(１２)、前記内管(１０)及び前記外管(１１)に密着するように圧縮変形する。Provided is a double hose that can suppress intrusion of foreign matter between an inner tube and an outer tube while ensuring flexibility, and that can provide good water stoppage at a hose connection portion. A double hose comprising an inner tube (10) made of a soft resin and an outer tube (11) made of a soft resin, between the inner tube (10) and the outer tube (11), in the direction of the tube axis. A reinforcing core (12) spirally wound at an interval is provided. The reinforcing core (12) is fixed to the inner tube (10) and the outer tube (11), and these adjacent reinforcing cores (12, 12) are provided. A compression-deformable wire (14) is arranged in a loose fit along the space (13) between the reinforcement core (12), the inner tube (10) and the wire due to stress. It is compressed and deformed so as to be in close contact with the outer tube (11).

Description


この発明は、可撓性を有する二重ホースに関する。
The present invention relates to a flexible double hose.


特許文献１には、内管と外管との間に、管軸方向に間隔をあけて螺旋巻回される補強芯と、これら補強芯間に形成された空間内に螺旋巻回される線材とを有する二重ホースが開示されている。

この二重ホースは、補強芯が内管や外管とそれぞれ溶着されている。しかし、線材は内管や外管、補強芯とは溶着されておらず、また、補強芯と線材との間には隙間が形成されているため、比較的高い可撓性を有している。
Patent Document 1 discloses a reinforcing core that is spirally wound between an inner tube and an outer tube at intervals in the tube axis direction, and a wire that is spirally wound in a space formed between the reinforcing cores. A double hose is disclosed.

In this double hose, the reinforcing core is welded to the inner tube and the outer tube, respectively. However, since the wire is not welded to the inner tube, the outer tube, and the reinforcing core, and a gap is formed between the reinforcing core and the wire, the wire has a relatively high flexibility. .


実開平２−１０５６８２号公報Japanese Utility Model Publication No. 2-105682


ところで、補強芯と線材との間の隙間は、補強芯や線材に沿って螺旋状に連続している。そのため、ホースの端部において開口し外部と連通状態にあり、この開口から隙間内に異物（特に液体）が入り込むことがあった。
By the way, the clearance gap between a reinforcement core and a wire is continuing spirally along a reinforcement core or a wire. Therefore, the hose is open at the end of the hose and is in communication with the outside, and foreign matter (particularly liquid) may enter the gap from this opening.


隙間内に異物が入り込んでしまうと、それを完全に取り除くことは困難である。また、食品などが入り込むと衛生上好ましくない。
If foreign matter enters the gap, it is difficult to completely remove it. Moreover, when food etc. enter, it is unpreferable on hygiene.


さらに、ホースを他のホースや機器などに接続するにあたっては、一般的に、ホースをニップルに外嵌させた状態においてホースの外側からバンドなどを用いて締め付ける方法（継手）が採られるが、このような接続方法では、隙間部分にバンドの締め付け力が作用しない。そのため、搬送圧によっては、隙間部分に位置する内管が隙間に入り込むようにして浮き上がってしまい、内管とニップルの間からホース内の搬送物が外部に漏れ出す虞があった。
Furthermore, when connecting the hose to other hoses or equipment, generally, a method (joint) is used in which the hose is tightened with a band from the outside of the hose in a state where the hose is externally fitted to the nipple. In such a connection method, the tightening force of the band does not act on the gap portion. For this reason, depending on the conveying pressure, the inner tube located in the gap portion floats so as to enter the gap, and there is a possibility that the conveyed item in the hose leaks to the outside from between the inner tube and the nipple.


そこで、本発明は、可撓性を確保しながらも、内管と外管との間への異物の侵入を抑制でき、さらにホース接続部において良好な止水性が得られる二重ホースの提供を目的とする。
Therefore, the present invention provides a double hose that can suppress the intrusion of foreign matter between the inner tube and the outer tube while ensuring flexibility, and can obtain good water stoppage at the hose connection portion. Objective.


この発明の二重ホースは、軟質樹脂製の内管１０と、軟質樹脂製の外管１１とからなる二重ホースであって、前記内管１０と前記外管１１との間に、管軸方向に間隔をあけて螺旋巻回される補強芯１２を設け、この前記補強芯１２は前記内管１０及び前記外管１１とに固着され、これら隣接する補強芯１２、１２間の空間１３に沿って、圧縮変形可能な線材１４を遊嵌状に配置し、この線材１４は、応力により前記補強芯１２、前記内管１０及び前記外管１１に密着するように圧縮変形することを特徴としている。
The double hose of the present invention is a double hose comprising an inner tube 10 made of a soft resin and an outer tube 11 made of a soft resin, and a tube shaft between the inner tube 10 and the outer tube 11. A reinforcing core 12 is provided which is spirally wound with a gap in the direction. The reinforcing core 12 is fixed to the inner tube 10 and the outer tube 11, and is formed in a space 13 between the adjacent reinforcing cores 12, 12. A wire 14 that can be compressed and deformed is arranged in a loose fit, and the wire 14 is compressed and deformed so as to be in close contact with the reinforcing core 12, the inner tube 10, and the outer tube 11 by stress. Yes.


また、隙間１５をもって、前記隣接する補強芯１２、１２間の空間１３に前記線材１４を遊嵌状に配置することが好ましい。
Moreover, it is preferable to arrange the wire 14 in a loose fit in the space 13 between the adjacent reinforcing cores 12, with a gap 15.


また、前記線材１４は、管径方向または管軸方向の圧縮応力により、圧縮変形することが好ましい。
Moreover, it is preferable that the said wire 14 compressively deforms with the compressive stress of a pipe radial direction or a pipe-axis direction.


また、前記線材１４の断面積が、圧縮時における前記空間１３の断面積と等しいことが好ましい。
Moreover, it is preferable that the cross-sectional area of the said wire 14 is equal to the cross-sectional area of the said space 13 at the time of compression.


また、前記線材１４の高さｈ１が、前記補強芯１２の高さｈ２よりも大であることが好ましい。
Moreover, it is preferable that the height h1 of the wire 14 is larger than the height h2 of the reinforcing core 12.


また、前記線材１４が前記内管１０及び前記外管１１よりも軟質な樹脂材からなることが好ましい。
The wire 14 is preferably made of a softer resin material than the inner tube 10 and the outer tube 11.


また、前記線材１４が前記補強芯１２よりも軟質な樹脂材からなることが好ましい。
The wire 14 is preferably made of a resin material that is softer than the reinforcing core 12.


また、前記補強芯１２の断面形状が略四角形であることが好ましい。
Moreover, it is preferable that the cross-sectional shape of the reinforcing core 12 is a substantially square shape.


また、前記線材１４の断面形状が略円形、又は略楕円形であることが好ましい。
Moreover, it is preferable that the cross-sectional shape of the said wire 14 is a substantially circular shape or a substantially elliptical shape.


この発明の二重ホースでは、線材を遊嵌状に配置しているため、空間内に線材を設けていても高い可撓性を発揮することができる。また、線材が、応力により補強芯、内管及び外管に密着するように圧縮変形するため、バンドなどによって応力が加われば、線材がシール材として機能することになり、二重ホースの開口端からの内管と外管の間への異物の侵入を抑制することができる。また、この場合、内管が線材によって押さえられるため、内管の浮き上がりを抑制することができ、ホース内の搬送物の外部への漏れ出しを抑制することができる。
In the double hose of the present invention, since the wire is arranged in a loose fit, high flexibility can be exhibited even if the wire is provided in the space. In addition, since the wire is compressed and deformed so as to be in close contact with the reinforcing core, the inner tube, and the outer tube due to stress, if the stress is applied by a band or the like, the wire will function as a sealing material, and the open end of the double hose Invasion of foreign matter from the inner pipe to the outer pipe can be suppressed. Moreover, in this case, since the inner tube is pressed by the wire, the floating of the inner tube can be suppressed, and leakage of the conveyed product in the hose to the outside can be suppressed.


また、隙間をもって、隣接する補強芯間の空間に線材を遊嵌状に配置すれば、より高い可撓性を発揮することができる。
Moreover, if a wire is arranged in a loose fit in the space between adjacent reinforcing cores with a gap, higher flexibility can be exhibited.


線材の断面積が、圧縮時における空間の断面積と等しければ、圧縮時に確実に隙間を塞ぐことができ、異物の侵入を抑制することができる。
If the cross-sectional area of the wire is equal to the cross-sectional area of the space at the time of compression, the gap can be reliably closed at the time of compression, and entry of foreign matter can be suppressed.


線材の高さが、補強芯の高さよりも大であれば、補強芯の変形量が小さくても線材を確実に押圧することができ、線材によって隙間を閉塞することができる。
If the height of the wire is larger than the height of the reinforcing core, the wire can be reliably pressed even if the deformation amount of the reinforcing core is small, and the gap can be closed by the wire.


線材が内管及び外管よりも軟質な樹脂材からなれば、線材を確実に押圧することができる。
If the wire is made of a softer resin material than the inner tube and the outer tube, the wire can be reliably pressed.


線材が補強芯よりも軟質な樹脂材からなれば、線材を確実に押圧することができる。
If the wire is made of a resin material that is softer than the reinforcing core, the wire can be reliably pressed.


補強芯の断面形状が略四角形であれば、補強芯を内管、外管に強固に固着させることができる。また、補強芯と内管、補強芯と外管との間に隙間が生じることがなく、線材が入り込めないような隙間が生じることが無い。
If the cross-sectional shape of the reinforcing core is substantially square, the reinforcing core can be firmly fixed to the inner tube and the outer tube. Further, there is no gap between the reinforcing core and the inner tube, and between the reinforcing core and the outer tube, and there is no gap that prevents the wire from entering.


線材の断面形状が略円形、又は楕円形であれば、線材と内管、線材と外管、線材と補強芯との接触面積が小さく、可撓性を阻害することがない。また、略円形であれば捩れを考慮しなくても良く、製作が容易である。また、略四角形のように角のある形状に比べて変形の自由度が高く、空間の形状に沿い易い。
If the cross-sectional shape of the wire is substantially circular or elliptical, the contact area between the wire and the inner tube, the wire and the outer tube, and the wire and the reinforcing core is small, and flexibility is not hindered. Moreover, if it is substantially circular, it is not necessary to consider a twist, and manufacture is easy. Further, the degree of freedom of deformation is higher than that of a square shape such as a substantially square shape, and it is easy to follow the shape of the space.


この発明の実施形態に係る二重ホースの一部破断側面図である。It is a partially broken side view of the double hose which concerns on embodiment of this invention. 二重ホースの要部拡大断面図である。It is a principal part expanded sectional view of a double hose. 接続部近傍を示す断面図である。It is sectional drawing which shows a connection part vicinity. 接続部における二重ホースの要部拡大断面図である。It is a principal part expanded sectional view of the double hose in a connection part. （ａ）、（ｂ）はそれぞれこの発明の他の実施形態に係る二重ホースの要部拡大断面図である。(A), (b) is the principal part expanded sectional view of the double hose which concerns on other embodiment of this invention, respectively.


次に、この発明の実施の形態について、図面を参照しつつ詳細に説明する。この発明の一実施形態に係る二重ホース１は、食品などを輸送するためのものであって、図１及び図２に示すように、内管１０と、内管１０の外周を覆う外管１１と、内管１０と外管１１との間に、管軸方向に間隔をあけて螺旋巻回される補強芯１２と、これら補強芯１２、１２間に形成された空間１３内に螺旋巻回される圧縮変形可能な線材１４とから構成されている。
Next, embodiments of the present invention will be described in detail with reference to the drawings. A double hose 1 according to an embodiment of the present invention is for transporting food and the like, and as shown in FIGS. 1 and 2, an inner tube 10 and an outer tube covering the outer periphery of the inner tube 10. 11, a reinforcing core 12 spirally wound between the inner tube 10 and the outer tube 11 at intervals in the tube axis direction, and a spiral winding in a space 13 formed between the reinforcing cores 12, 12. It is comprised from the wire 14 which can be compressed and deformed.


内管１０は、例えば可撓性に優れた軟質の塩化ビニル樹脂からなる。なお、硬度としては、ＪＩＳのショア硬度Ａスケール５０〜６２の範囲のものを使用している。この内管１０は、図１及び図２に示すように、その内周面が平滑となっている。
The inner tube 10 is made of, for example, a soft vinyl chloride resin having excellent flexibility. The hardness is in the range of JIS Shore hardness A scale 50-62. As shown in FIGS. 1 and 2, the inner pipe 10 has a smooth inner peripheral surface.


外管１１は、内管１０と同様、例えば可撓性に優れた軟質の塩化ビニル樹脂からなる。なお、硬度としては、ＪＩＳのショア硬度Ａスケール７２〜８０の範囲のものを使用している。この外管１１は、図１及び図２に示すように、補強芯１２上において平坦で、線材１４上において外側に膨らんだ形状となっている。なお、外管１１の方が、内管１０よりも薄肉とされている。また、外管１１の内径は、内管１０の外径よりも大とされており、外管１１の内周面と内管１０の外周面との間には間隔が設けられている。
Similar to the inner tube 10, the outer tube 11 is made of, for example, a soft vinyl chloride resin having excellent flexibility. The hardness is in the range of JIS Shore hardness A scale 72-80. As shown in FIGS. 1 and 2, the outer tube 11 is flat on the reinforcing core 12 and bulges outward on the wire 14. The outer tube 11 is thinner than the inner tube 10. The inner diameter of the outer tube 11 is larger than the outer diameter of the inner tube 10, and a gap is provided between the inner peripheral surface of the outer tube 11 and the outer peripheral surface of the inner tube 10.


補強芯１２は、硬質の塩化ビニル樹脂からなる。なお、硬度としては、ＪＩＳのロックウェル硬さＨＲＲ１０５〜１２０の範囲のものを使用している。この補強芯１２は、図１及び図２に示すように、断面略四角形、具体的には、管軸方向に長い略長方形状とされている。そのため、補強芯１２、１２間に形成される螺旋状の空間１３は、断面略四角形状となっている。また、この補強芯１２は、その上下面がそれぞれ外管１１及び内管１０と溶着（固着）されている。
The reinforcing core 12 is made of a hard vinyl chloride resin. In addition, as a hardness, the thing of the range of Rockwell hardness HRR105-120 of JIS is used. As shown in FIGS. 1 and 2, the reinforcing core 12 has a substantially rectangular cross section, specifically, a substantially rectangular shape that is long in the tube axis direction. Therefore, the spiral space 13 formed between the reinforcing cores 12 and 12 has a substantially quadrangular cross section. The upper and lower surfaces of the reinforcing core 12 are welded (fixed) to the outer tube 11 and the inner tube 10, respectively.


線材１４は、例えば可撓性及び弾力性に優れた水添スチレンブタジエンゴムなどのスチレン系樹脂であって、内管１０や外管１１、補強芯１２よりも軟質の弾性を有する樹脂からなる。なお、硬度としては、ＪＩＳのショア硬度Ａスケール３６〜４６の範囲のものを使用しており、内管１０や外管１１、補強芯１２よりも低い。この線材１４の断面形状は、図１及び図２に示すように、管軸方向に長い略楕円形とされており、内管１０と外管１１と補強芯１２とで区画された断面略四角形状の空間１３内に配置されることで、線材１４の軸方向に、補強芯１２と内管１０と線材１４、または補強芯１２と外管１１と線材１４とで区画された隙間１５が形成されている。

なお、隙間１５としては、図２に示すようにはっきりと目視できるものの他、毛細管現象が生じるような微細な隙間や、二重ホース１を湾曲させた際に生じる隙間も含むものとする。

また、線材１４は、管径方向において、その高さｈ１が補強芯１２の高さｈ２よりも大とされている。具体的には、線材１４の高さｈ１が補強芯１２の高さｈ２の１〜１．３倍（１＜ｈ１／ｈ２≦１．３）とされている。なお、１．１倍以上であれば特に好ましいが、１．３倍よりも大きくなると内管１０の外周面の凹凸が大きくなるため好ましくない。
また、内管１０や外管１１、補強芯１２とは溶着（固着）しておらず、補強芯１２、１２間に形成されている空間１３内を移動可能となっている。この状態は換言すれば、線材１４が補強芯１２、１２間に遊嵌状に配置されている、または、内管１０や外管１１、補強芯１２によって挟持（押圧）されている状態ではなく、弾性体である線材１４が内管１０や外管１１、補強芯１２に反発していない（反発力を付与していない）状態であるといえる。
The wire 14 is, for example, a styrene resin such as hydrogenated styrene butadiene rubber having excellent flexibility and elasticity, and is made of a resin having softer elasticity than the inner tube 10, the outer tube 11, and the reinforcing core 12. In addition, as a hardness, the thing of the range of the JIS Shore hardness A scale 36-46 is used, and it is lower than the inner tube 10, the outer tube 11, and the reinforcement core 12. As shown in FIGS. 1 and 2, the cross-sectional shape of the wire 14 is a substantially oval shape that is long in the tube axis direction, and is a substantially square cross section defined by the inner tube 10, the outer tube 11, and the reinforcing core 12. By being arranged in the shaped space 13, a gap 15 defined by the reinforcing core 12 and the inner tube 10 and the wire 14 or the reinforcing core 12, the outer tube 11 and the wire 14 is formed in the axial direction of the wire 14. Has been.

As shown in FIG. 2, the gap 15 includes a fine gap that causes a capillary phenomenon and a gap that occurs when the double hose 1 is bent, in addition to what can be clearly seen.

Further, the wire 14 has a height h1 greater than a height h2 of the reinforcing core 12 in the tube radial direction. Specifically, the height h1 of the wire 14 is 1 to 1.3 times the height h2 of the reinforcing core 12 (1 <h1 / h2 ≦ 1.3). In addition, it is especially preferable if it is 1.1 times or more, but if it exceeds 1.3 times, the unevenness of the outer peripheral surface of the inner tube 10 becomes large.
Further, the inner tube 10, the outer tube 11, and the reinforcing core 12 are not welded (fixed), and can move in the space 13 formed between the reinforcing cores 12 and 12. In other words, this state is not a state in which the wire 14 is arranged loosely between the reinforcing cores 12 or 12 or is sandwiched (pressed) by the inner tube 10, the outer tube 11, or the reinforcing core 12. In other words, it can be said that the wire 14 which is an elastic body is not repelled (no repulsive force is applied) to the inner tube 10, the outer tube 11 and the reinforcing core 12.


上記の二重ホース１は、以下のようにして製造される。まず、押出機から内管構成用の帯状体を押し出す。そして、この帯状体をマンドレル上に螺旋巻回する。この際、先行する帯状体の端部に後続の帯状体の端部を重ね合わせ、端部同士を熱融着することで内管１０を形成する。
Said double hose 1 is manufactured as follows. First, a strip for forming an inner tube is extruded from an extruder. Then, the belt-like body is spirally wound on a mandrel. In this case, the inner tube 10 is formed by superimposing the end portions of the subsequent strips on the end portions of the preceding strips and heat-sealing the ends.


続いて、下流側に位置する別の押出機から補強芯１２を押し出すとともに、内管１０の外周面上に間隔をあけて等ピッチで螺旋巻回する。
Subsequently, the reinforcing core 12 is pushed out from another extruder located on the downstream side, and spirally wound at an equal pitch on the outer peripheral surface of the inner tube 10 at intervals.


続いて、さらに下流側に位置する別の押出機から線材１４を押し出すとともに、内管１０の外周面上であって且つ補強芯１２、１２間に位置するようにして等ピッチで螺旋巻回する。
Subsequently, the wire 14 is extruded from another extruder located further downstream, and spirally wound at an equal pitch on the outer peripheral surface of the inner tube 10 and between the reinforcing cores 12 and 12. .


その後、さらに下流側に位置する別の押出機から外管構成用の帯状体を押し出し、この帯状体を補強芯１２及び線材１４上に螺旋巻回する。なお、この際、内管１０と同様、先行する帯状体の端部に後続の帯状体の端部を重ね合わせ、端部同士を熱融着することで外管１１を形成する。
Thereafter, a strip for forming the outer tube is extruded from another extruder located further downstream, and this strip is spirally wound on the reinforcing core 12 and the wire 14. At this time, like the inner tube 10, the outer tube 11 is formed by superimposing the end portions of the following strips on the ends of the preceding strips and heat-sealing the ends.


上記一連の工程は、各樹脂が互いに熱融着可能な程度に溶融した状態で行われる。そのため、同種材料（塩化ビニル樹脂）からなる補強芯１２と内管１０、補強芯１２と外管１１は自ずと熱融着される。ただ、内管１０や外管１１、補強芯１２と異種の材料（スチレン系樹脂）からなる線材１４は、これらと熱融着されることは無く、空間１３内を移動可能となる。
The series of steps is performed in a state where the resins are melted to such an extent that they can be heat-sealed to each other. Therefore, the reinforcing core 12 and the inner tube 10 made of the same material (vinyl chloride resin), and the reinforcing core 12 and the outer tube 11 are naturally heat-sealed. However, the wire 14 made of a different material (styrene resin) from the inner tube 10, the outer tube 11, and the reinforcing core 12 is not thermally fused to these, and can move in the space 13.


上記構成の二重ホース１は、例えば図３に示すような接続具を用いて機器に接続される。接続具２０は、ニップル２１と、締め付け手段（バンド）２２とからなり、ニップル２１の外周面に二重ホース１を装着した後、二重ホース１の外周面にバンド２２を取り付け、バンド２２を締め付けることで接続を行う。
The double hose 1 having the above-described configuration is connected to a device using, for example, a connector as shown in FIG. The connector 20 includes a nipple 21 and a fastening means (band) 22. After the double hose 1 is mounted on the outer peripheral surface of the nipple 21, the band 22 is attached to the outer peripheral surface of the double hose 1. Connect by tightening.


この際、図３及び図４に示すように、二重ホース１は、バンド２２の締め付け力によって、軟質樹脂からなる内管１０や外管１１、線材１４が変形する。例えば直径５９ｍｍ、管厚４ｍｍの二重ホース１において、締め付け力５Ｎ・ｍで（又は管厚１ｍｍ減（もとの厚みの７５％）となるように）締め付けると、補強芯１２よりも管径方向の高さが大とされた線材１４が、外管１１を介して下方に向かって押圧され空間１３内に広がり、その断面形状が略四角形となる。また、同時に内管１０や外管１１が補強芯１２を避けるようにして変形し、補強芯１２、１２間に迫り出す。なお、この状態は、補強芯１２が内管１０、外管１１に食い込んでいるともいえる。そして、この圧縮状態において、空間１３の断面積と、線材１４の断面積とが等しくなって、空間１３内が線材１４によって満たされる結果、隙間１５が無くなる。すなわち、線材１４が自身の反発力をもって内管１０や外管１１、補強芯１２とそれぞれ強く当接（密着）し、シール材としての機能を発揮した状態となる。
At this time, as shown in FIGS. 3 and 4, in the double hose 1, the inner tube 10, the outer tube 11, and the wire 14 made of a soft resin are deformed by the tightening force of the band 22. For example, in a double hose 1 having a diameter of 59 mm and a tube thickness of 4 mm, when tightened with a tightening force of 5 N · m (or so that the tube thickness is reduced by 1 mm (75% of the original thickness)), the tube diameter is larger than the reinforcing core 12. The wire 14 whose height in the direction is increased is pressed downward through the outer tube 11 and spreads in the space 13, and its cross-sectional shape becomes a substantially square shape. At the same time, the inner tube 10 and the outer tube 11 are deformed so as to avoid the reinforcing core 12 and are pushed out between the reinforcing cores 12 and 12. In this state, it can also be said that the reinforcing core 12 bites into the inner tube 10 and the outer tube 11. In this compressed state, the cross-sectional area of the space 13 is equal to the cross-sectional area of the wire 14, and the space 13 is filled with the wire 14. As a result, the gap 15 is eliminated. That is, the wire 14 is brought into strong contact (adherence) with the inner tube 10, the outer tube 11, and the reinforcing core 12 with its own repulsive force, and a function as a sealing material is exhibited.


そのため、二重ホース１の開口端より、内管１０と外管１１との間に異物などの侵入を防止できる。つまり、本発明の二重ホース１では、線材１４と、内管１０や外管１１、補強芯１２とを溶着させていないにもかかわらず、補強芯１２と線材１４との間に生じる隙間１５への異物の侵入を抑制することができる。また、空間１３の形状に沿って変形した（空間１３内に広がった）線材１４によって内管１０がニップル２１側に押さえつけられるため、内管１０の浮き上がりを抑制し、内管１０とニップル２１との間のシール性を維持することができ、ホース内の搬送物の外部への漏れ出しを抑制することができる。なお、バンド２２の締め付け力が作用しない箇所、すなわち、非圧縮状態であるホースの中間部（接続部以外の部分）においては、接続後も線材１４が、内管１０や外管１１、補強芯１２と密着しておらず、可撓性を維持できることから、使い勝手が良い。具体例を挙げると、上記直径５９ｍｍのホースでは、曲げ半径４００ｍｍに曲げた際、ホースが元に戻ろうとする力（反力）は７０Ｎ程度となる。従来の内外フラットホース、即ち、軟質ホース壁に螺旋状補強芯を固着埋入した同径ホースの場合では３２０Ｎ程度となり、有意に可撓性が向上し、ホース取り回しが容易であることがわかる。
Therefore, it is possible to prevent entry of foreign matters between the inner tube 10 and the outer tube 11 from the open end of the double hose 1. That is, in the double hose 1 of the present invention, the gap 15 generated between the reinforcing core 12 and the wire 14, although the wire 14, the inner tube 10, the outer tube 11, and the reinforcing core 12 are not welded. Invasion of foreign matter into the body can be suppressed. Further, since the inner tube 10 is pressed against the nipple 21 by the wire 14 deformed along the shape of the space 13 (expanded in the space 13), the inner tube 10 is prevented from being lifted, and the inner tube 10 and the nipple 21 Can be maintained, and leakage of the conveyed product in the hose to the outside can be suppressed. It should be noted that the wire 14 remains in the inner tube 10, the outer tube 11, and the reinforcing core even after the connection at the portion where the tightening force of the band 22 does not act, that is, in the intermediate portion of the hose that is in an uncompressed state (portion other than the connection portion). Since it is not in close contact with 12 and can maintain flexibility, it is easy to use. As a specific example, in a hose having a diameter of 59 mm, when the hose is bent to a bending radius of 400 mm, the force (reaction force) for the hose to return to the original is about 70N. In the case of a conventional inner and outer flat hose, that is, a hose having the same diameter in which a helical reinforcing core is fixedly embedded in a soft hose wall, it is about 320 N, which shows that the flexibility is significantly improved and the hose can be easily routed.


図５ａ、ｂは、本発明の他の実施形態に係る二重ホース１Ａ、１Ｂを示している。図５ａに示す二重ホース１Ａは、ホース内周面側（流路側）に線材１４を突出させた点に特徴を有する。このような構成であっても、線材１４を確実に押圧することができ、隙間１５内への異物の侵入を抑制することができる。
5a and 5b show double hoses 1A and 1B according to another embodiment of the present invention. The double hose 1A shown in FIG. 5a is characterized in that the wire 14 is projected on the inner peripheral surface side (flow channel side) of the hose. Even if it is such a structure, the wire 14 can be pressed reliably and the penetration | invasion of the foreign material in the clearance gap 15 can be suppressed.


また、図５ｂに示す二重ホース１Ｂは、管径方向における補強芯１２と線材１４の高さを略等しくしたものである。このような構成であっても、補強芯１２の材料として比較的軟質な樹脂を用いれば、線材１４を押圧することが可能であり、上記二重ホース１、１Ａと同様の作用効果を奏する。また、外管１１の外周面が平滑であれば、ホース表面を掃除し易いといった利点がある。これは、線材１４の高さｈ１と、補強芯１２の高さｈ２の差が小さい場合でも同様である。
Moreover, the double hose 1B shown in FIG. 5b is one in which the heights of the reinforcing core 12 and the wire 14 in the tube diameter direction are substantially equal. Even if it is such a structure, if comparatively soft resin is used as the material of the reinforcement core 12, it is possible to press the wire 14, and there exists an effect similar to the said double hose 1 and 1A. Moreover, if the outer peripheral surface of the outer tube | pipe 11 is smooth, there exists an advantage that it is easy to clean the hose surface. This is the same even when the difference between the height h1 of the wire 14 and the height h2 of the reinforcing core 12 is small.


以上に本発明の実施形態について説明したが、この発明は、上記実施形態に限定されるものではなく、この発明の範囲内で上記実施形態に多くの修正及び変更を加え得ることは勿論である。
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention. .


例えば、本発明の二重ホース１、１Ａ、１Ｂは、食品の搬送に限らず、工業用部品、各種の粒体や粉体等のような他の固形物、さらには土砂等を含む水、生コンクリート等のような各種の流動物の搬送を目的とするものであっても良い。
For example, the double hose 1, 1A, 1B of the present invention is not limited to the conveyance of food, but is an industrial part, other solid matter such as various types of granules and powder, and water containing earth and sand, For the purpose of conveying various fluids such as ready-mixed concrete.


また、内管１０や外管１１、補強芯１２、線材１４の材質としては公知の種々の樹脂が使用可能である。また、補強芯１２は、単一樹脂で構成されたものに限らず、硬度の異なる樹脂を複数積層したものや、芯材として鋼線を入れたものを使用しても良い。また、線材１４としては、ポリエチレンなどのオレフィン系樹脂を用いることも可能である。
Further, as the material of the inner tube 10, the outer tube 11, the reinforcing core 12, and the wire 14, various known resins can be used. The reinforcing core 12 is not limited to a single resin, but may be a laminate of a plurality of resins having different hardnesses or a steel wire inserted as a core material. Further, as the wire 14, an olefin resin such as polyethylene can be used.


また、補強芯１２の断面形状としては、管軸方向に長い略長方形の他、管軸方向に短い略長方形や略正方形であっても良い。また、線材１４の断面形状としては、略楕円形に限らず略円形であっても良い。なお、補強芯１２や線材１４の断面は、所定の形（例えば略四角形や略楕円形）に押し出しても、硬化するまでの間に、重力や周辺の状況により変形する場合がある。そのため、本発明はそのような変形後の形状、例えば略俵状の断面形状をした補強芯１２や線材１４も発明の範囲として含むものとする。
The cross-sectional shape of the reinforcing core 12 may be a substantially rectangular shape that is short in the tube axis direction, or a substantially rectangular shape or a square shape that is short in the tube axis direction. Further, the cross-sectional shape of the wire 14 is not limited to a substantially elliptical shape but may be a substantially circular shape. In addition, even if the cross section of the reinforcing core 12 or the wire 14 is extruded into a predetermined shape (for example, a substantially square shape or a substantially oval shape), it may be deformed due to gravity or surrounding conditions until it is cured. Therefore, the present invention includes the reinforcing core 12 and the wire 14 having such a deformed shape, for example, a substantially bowl-shaped cross-sectional shape, as the scope of the invention.


また、ホースの接続方法としては、バンド２２による締め付けの他、一定の径とされた環状のバンドを二重ホース１、１Ａ、１Ｂに外嵌させた状態において、拡径可能なニップルをホース端部に差し込み、適宜拡径させることで接続する方法を採っても良い。この場合でも、線材１４を管径方向に圧縮することができるため、上記実施形態と同様の作用効果を奏する。
Further, as a method of connecting the hose, in addition to tightening with the band 22, a nipple capable of expanding the diameter is attached to the end of the hose in a state where an annular band having a constant diameter is externally fitted to the double hose 1, 1A, 1B. You may take the method of connecting by inserting in a part and expanding a diameter suitably. Even in this case, since the wire rod 14 can be compressed in the tube diameter direction, the same effects as those of the above-described embodiment can be obtained.


また、ホース端部をニップルのフランジや段差等に押し当てることで接続する方法を採用しても良い。この場合も、線材１４が、補強芯１２によって管軸方向に圧縮されるため、空間１３の形状に沿って変形し、シール性を発揮することになる。
Moreover, you may employ | adopt the method of connecting by pressing a hose end part against the flange, level | step difference, etc. of a nipple. Also in this case, since the wire 14 is compressed in the tube axis direction by the reinforcing core 12, the wire 14 is deformed along the shape of the space 13 and exhibits sealing performance.


１・・二重ホース、１０・・内管、１１・・外管、１２・・補強芯、１３・・空間、１４・・線材、１５・・隙間、２０・・接続具、２１・・ニップル、２２・・締め付け手段、ｈ１・・線材の高さ、ｈ２・・補強芯の高さ
1 ·· Double hose, 10 ·· Inner tube, 11 ·· Outer tube, 12 ·· Reinforcement core, 13 ·· Space, 14 ·· Wire, 15 ·· Gap, 20 ·· Connector, 21 ·· Nipple , 22 .. Tightening means, h1 .. height of wire rod, h2 .. height of reinforcing core

Claims (10)


軟質樹脂製の内管（１０）と、

軟質樹脂製の外管（１１）とからなる二重ホースであって、

前記内管（１０）と前記外管（１１）との間に、管軸方向に間隔をあけて螺旋巻回される補強芯（１２）を設け、この前記補強芯（１２）は前記内管（１０）及び前記外管（１１）とに固着され、

これら隣接する補強芯（１２、１２）間の空間（１３）に沿って、圧縮変形可能な線材（１４）を遊嵌状に配置し、この線材（１４）は、応力により前記補強芯（１２）、前記内管（１０）及び前記外管（１１）に密着するように圧縮変形することを特徴とする二重ホース。
An inner tube (10) made of soft resin;

A double hose comprising an outer tube (11) made of a soft resin,

Between the inner pipe (10) and the outer pipe (11), there is provided a reinforcing core (12) spirally wound with a gap in the pipe axis direction, and the reinforcing core (12) is the inner pipe. (10) and fixed to the outer tube (11),

A compression-deformable wire (14) is arranged in a loose fit along the space (13) between these adjacent reinforcing cores (12, 12). The wire (14) is stressed by the reinforcing core (12). ), A double hose which is compressed and deformed so as to be in close contact with the inner tube (10) and the outer tube (11).

隙間（１５）をもって、前記隣接する補強芯（１２、１２）間の空間（１３）に前記線材（１４）を遊嵌状に配置する請求項１記載の二重ホース。
The double hose according to claim 1, wherein the wire (14) is arranged in a loose fit in the space (13) between the adjacent reinforcing cores (12, 12) with a gap (15).

前記線材（１４）は、管径方向の圧縮応力により、前記圧縮変形する請求項２記載の二重ホース。
The double hose according to claim 2, wherein the wire (14) is compressively deformed by a compressive stress in a pipe radial direction.

前記線材（１４）は、管軸方向の圧縮応力により、前記圧縮変形する請求項２記載の二重ホース。
The double hose according to claim 2, wherein the wire (14) is compressively deformed by a compressive stress in a tube axis direction.

前記線材（１４）の断面積が、圧縮時における前記空間（１３）の断面積と等しい請求項１から４のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 4, wherein a cross-sectional area of the wire (14) is equal to a cross-sectional area of the space (13) during compression.

前記線材（１４）の高さ（ｈ１）が、前記補強芯（１２）の高さ（ｈ２）よりも大である請求項１から４のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 4, wherein a height (h1) of the wire (14) is larger than a height (h2) of the reinforcing core (12).

前記線材（１４）が前記内管（１０）及び前記外管（１１）よりも軟質な樹脂材からなる請求項１から６のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 6, wherein the wire (14) is made of a resin material softer than the inner tube (10) and the outer tube (11).

前記線材（１４）が前記補強芯（１２）よりも軟質な樹脂材からなる請求項１から７のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 7, wherein the wire (14) is made of a resin material that is softer than the reinforcing core (12).

前記補強芯（１２）の断面形状が略四角形である請求項１から８のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 8, wherein a cross-sectional shape of the reinforcing core (12) is a substantially square shape.

前記線材（１４）の断面形状が略円形、又は略楕円形である請求項１から９のいずれかに記載の二重ホース。
The double hose according to any one of claims 1 to 9, wherein a cross-sectional shape of the wire (14) is substantially circular or substantially elliptical.
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