JP2006123206A - Method and apparatus for manufacturing molded hose - Google Patents

Method and apparatus for manufacturing molded hose Download PDF

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JP2006123206A
JP2006123206A JP2004311147A JP2004311147A JP2006123206A JP 2006123206 A JP2006123206 A JP 2006123206A JP 2004311147 A JP2004311147 A JP 2004311147A JP 2004311147 A JP2004311147 A JP 2004311147A JP 2006123206 A JP2006123206 A JP 2006123206A
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hose
core
shape
predetermined shape
vulcanization
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Sueji Hirai
末治 平井
Jun Nishioka
準 西岡
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Togawa Rubber Co Ltd
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Togawa Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded hose manufacturing apparatus capable of performing operation for drawing a core rod having a bent shape out of a hose completed in vulcanization in a relatively easy manner in an apparatus for manufacturing a molded hose having a rubber layer and the resin layer laminated thereon and formed into a predetermined shape by bending processing even if the radius of carvature of the bent shape is small and capable of obtaining the desired bent shape conforming to the bent shape of the vulcanization core rod, and a molded hose manufacturing method. <P>SOLUTION: The molded hose manufacturing apparatus 1 has contact parts 30a, 30b, 30c and 30d constituted so as to heat a hose 42, which has a core having a shape corresponding to the predetermined shape inserted therein, for the purpose of vulcanization and used after the core is drawn out of the hose after vulcanization but before cooling to apply external force to the outer surface of the hose 42 in order to hold the outer shape of the hose 42 to the predetermined shape and can cool the hose 42 to a room temperature while holding the outer shape of the hose 42 to the predetermined shape by the contact parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法および同方法に用いる製造装置に関する。   The present invention relates to a method for manufacturing a molded hose having a rubber layer and a resin layer laminated on the rubber layer and bent into a predetermined shape, and a manufacturing apparatus used in the method.

この種の方法および同方法に用いる装置としては、本発明に関連する先行技術文献情報として下記に示す特許文献1に開示された発明がある。この特許文献1には、ゴム層と樹脂層とを積層した曲がりホース(成形ホース)の製造方法が記されており、ここには、中芯の外周に内層ゴム、中間樹脂、外層ゴムの順に押し出し成形し、次に、中芯を付けたまま予備加硫を行うことで内外層ゴムに或る程度の弾性を付与し、予備加硫が終了したホースから中芯を抜き、この予備加硫したホースを所望の曲がりをつけた加硫用の芯棒(マンドレル)に差し込み、さらに、加硫用の芯棒を付けたままで本加硫する方法が記されている。
特開2000−289121号公報(段落番号0016、0018、図1、図3)
As this type of method and an apparatus used in the method, there is an invention disclosed in Patent Document 1 shown below as prior art document information related to the present invention. This Patent Document 1 describes a method of manufacturing a bent hose (molded hose) in which a rubber layer and a resin layer are laminated. Here, an inner layer rubber, an intermediate resin, and an outer layer rubber are arranged on the outer periphery of the core. Extruded, and then pre-vulcanized with the core attached to give a certain degree of elasticity to the inner and outer rubber layers, and the core is removed from the hose that has been pre-vulcanized. A method is described in which the hose is inserted into a vulcanizing core rod (mandrel) with a desired bend and further vulcanized with the vulcanizing core rod attached.
JP 2000-289121 A (paragraph numbers 0016, 0018, FIGS. 1 and 3)

しかし、特許文献1の発明には、記載された操作の次工程として、本加硫が終了したホースから曲がり形状の加硫用の芯棒を抜き取る際に、ホース温度が室温付近まで下がってから抜き取ろうとすると、内外層ゴムの硬度が高く抜き難いため、曲がり形状の曲率半径が所定の下限値を上回るように設定しておかないとスムースな抜き取りができず、曲率半径が下限値より小さくなると抜き取りに無理が生じてゴム層が裂け易い、瘤状の隆起や皺(しわ)が形成されてしまう、或いは、加硫用の芯棒が変形してしまうという問題があった。尚、ゴム層に積層された樹脂層が当初の形状に戻ろうとする性質などに起因する、加硫芯棒から取り出したホースの曲げ角度が加硫芯棒の曲げ角度よりも大きくなる曲げ戻り現象を防止する目的で、加硫芯棒の曲げ角度を予測される曲げ戻りの分だけきつくしておく方法を取ると、本加硫を完了したホースから曲がり形状の加硫芯棒を抜き取る操作がさらに困難になるという問題が生じる傾向があった。   However, in the invention of Patent Document 1, as the next step of the described operation, when the bent vulcanizing core rod is extracted from the hose after the main vulcanization, the hose temperature is lowered to near room temperature. When trying to pull out, the hardness of the inner and outer layer rubber is high and difficult to pull out.If the radius of curvature of the curved shape is not set to exceed the specified lower limit value, smooth extraction cannot be performed and the radius of curvature is smaller than the lower limit value. In this case, there is a problem that unreasonable extraction occurs and the rubber layer is easily torn, a bump-like ridge or wrinkle is formed, or the core rod for vulcanization is deformed. In addition, the bending back phenomenon that the bending angle of the hose taken out from the vulcanizing core rod becomes larger than the bending angle of the vulcanizing core rod due to the property that the resin layer laminated on the rubber layer tries to return to the original shape. In order to prevent this, the bending angle of the vulcanized core rod should be tightened by the expected amount of bending return, and the operation of extracting the bent vulcanized core rod from the hose that has completed this vulcanization There was a tendency for problems to become more difficult.

したがって、本発明の目的は、上に例示した従来技術による技術の持つ前述した欠点に鑑み、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法、並びに、同方法に用いる装置であって、加硫が終了したホースから曲がり形状の芯棒を抜き取る操作を、たとえ曲がり形状の曲率半径が小さくても、比較的容易に且つホースが裂ける瘤または皺が形成される等の障害を伴わずに実行でき、しかも、加硫芯棒の曲がり形状に即した所望の曲がり形状を得ることの可能な、成形ホースの製造方法、並びに、同方法に用いる装置を提供することにある。   Accordingly, the object of the present invention is to have the rubber layer and the resin layer laminated on the rubber layer, and to be bent into a predetermined shape in view of the above-mentioned drawbacks of the prior art techniques exemplified above. A method of manufacturing a molded hose, and an apparatus used for the method, and the operation of extracting a bent core from a hose after vulcanization is relatively easy even if the bent radius of curvature is small. And a method for producing a molded hose that can be executed without any obstacles such as formation of a knot or wrinkle that the hose tears, and that can obtain a desired bent shape that conforms to the bent shape of the vulcanized core rod, An object of the present invention is to provide an apparatus used in the method.

本発明の第1の特徴は、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法であって、
前記所定形状に対応する形状の中芯を内面側に挿入した状態のホースを加硫のために加熱し、加硫後で放冷前のホースから前記中芯を抜き取った後、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつホースを冷却する点にある。
A first feature of the present invention is a method of manufacturing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
The hose with the core corresponding to the predetermined shape inserted on the inner surface side is heated for vulcanization, and after the vulcanization, the core is removed from the hose before cooling and then on the outer surface of the hose. The hose is cooled while the outer shape of the hose is held in the predetermined shape by a jig for applying an external force.

したがって、本発明の第1の特徴構成による方法では、加硫後のホースから曲がり形状の中芯(マンドレル)を抜き取る操作を、ホースの放冷前のゴム層が未だ十分な柔軟性を保持している段階で行うので、たとえ曲がり形状の曲率半径が小さくても、同操作を比較的容易に実行できる。また、曲がり形状の中芯を抜き取った後のホースを冷却(例えば室温或いは室温以下まで冷却)する操作を、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつ行うので、ホースが予備加硫時の直線形状に戻ろうとすることなく、中芯の曲がり形状に即した所望の曲がり形状の成形ホースが円滑に、しかも、ホースが裂ける瘤または皺が形成される等の障害を伴わずに得られる。   Therefore, in the method according to the first characteristic configuration of the present invention, the operation of extracting the bent core (mandrel) from the hose after vulcanization, the rubber layer before allowing the hose to cool still retains sufficient flexibility. Therefore, even if the curvature radius of the bent shape is small, the operation can be executed relatively easily. Also, the operation of cooling the hose after extracting the bent core (for example, cooling to room temperature or below room temperature) is performed while holding the outer shape of the hose in the predetermined shape by a jig that applies an external force to the outer surface of the hose. Therefore, the hose can be smoothly formed with a desired bent shape that conforms to the bent shape of the core without trying to return to the linear shape at the time of preliminary vulcanization, and a hump or crease or the like can be formed. Obtained without any obstacles.

本発明の第2の特徴は、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法であって、
直線状の第1中芯を内面側に挿入した状態のホースを予備加硫のために加熱し、前記第1中芯を抜き取り、次に、前記所定形状に対応する形状の第2中芯を内面側に挿入した状態のホースを加硫のために加熱し、加硫後で放冷前のホースから前記第2中芯を抜き取った後、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつホースを冷却する点にある。
A second feature of the present invention is a method of manufacturing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
A hose with a linear first core inserted into the inner surface is heated for preliminary vulcanization, the first core is removed, and then a second core having a shape corresponding to the predetermined shape is removed. The hose inserted on the inner surface side is heated for vulcanization, and after the second core is removed from the hose after vulcanization and before cooling, the outer shape of the hose is applied by a jig that applies external force to the outer surface of the hose. Is that the hose is cooled while maintaining the predetermined shape.

したがって、本発明の第2の特徴構成による方法では、本加硫後のホースから曲がり形状の第2中芯(マンドレル)を抜き取る操作を、ホースの放冷前のゴム層が未だ十分な柔軟性を保持している段階で行うので、たとえ曲がり形状の曲率半径が小さくても、同操作を比較的容易に実行できる。また、曲がり形状の第2中芯を抜き取った後のホースを冷却(例えば室温或いは室温以下まで冷却)する操作を、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつ行うので、ホースが予備加硫時の直線形状に戻ろうとすることなく、第2中芯の曲がり形状に即した所望の曲がり形状の成形ホースが円滑に得られる。   Therefore, in the method according to the second characteristic configuration of the present invention, the operation of removing the bent second core (mandrel) from the vulcanized hose is still flexible enough for the rubber layer before the hose to cool down. Therefore, even if the curvature radius of the curved shape is small, the operation can be executed relatively easily. The operation of cooling the hose after removing the bent second core (for example, cooling to room temperature or below room temperature) is performed by holding the outer shape of the hose in the predetermined shape by a jig that applies external force to the outer surface of the hose. Therefore, the molded hose having a desired bent shape that conforms to the bent shape of the second core can be obtained smoothly without trying to return the hose to the linear shape at the time of preliminary vulcanization.

本発明の第3の特徴は、前記冷却に際して、前記治具はホースの外周の長さの少なくとも三分の一にわたって外力を加える点にある。   A third feature of the present invention is that, during the cooling, the jig applies an external force over at least one third of the length of the outer periphery of the hose.

したがって、本発明の第3の特徴構成による方法では、前記治具は、ホースの側面を左右から挟み付けることによって、前記曲げ加工に基づくホースの扁平化を抑制することができ、その結果、長手方向に沿って一貫して断面形状が円形で従って断面積も長手方向に沿って一定の、流体の搬送に対して有利な成形ホースが円滑に得られる。   Therefore, in the method according to the third characteristic configuration of the present invention, the jig can suppress the flattening of the hose based on the bending process by sandwiching the side surface of the hose from the left and right. It is possible to smoothly obtain a molded hose which is advantageous in terms of fluid conveyance, in which the cross-sectional shape is consistently circular along the direction and therefore the cross-sectional area is constant along the longitudinal direction.

本発明の第4の特徴は、前記治具は、ホースを巻き掛け可能な周面を備えた押さえ部材からなり、前記押さえ部材の前記周面は、巻き掛けられたホースの断面を円形に保つためにホースの両側面を支持する円弧状の断面を備える点にある。   According to a fourth aspect of the present invention, the jig includes a pressing member having a circumferential surface around which the hose can be wound, and the circumferential surface of the pressing member maintains a circular cross section of the hose that is wound. Therefore, it is in the point provided with the circular-arc-shaped cross section which supports the both sides | surfaces of a hose.

したがって、本発明の第4の特徴構成による方法では、治具が、ホースを巻き掛け可能な周面を備えた押さえ部材からなるので、ホースを押さえ部材の周面に沿ったある程度の長さにわたって案内及び位置規制でき、その結果、押さえ部材の位置や押さえ部材の周面の向きを適宜に設定することによって、ホースに付与すべき所定形状が三次元形状(成形ホースの少なくとも2つの湾曲部を含む軸芯を一つの平面内に含ませることの出来ない形状)である場合にも、加硫芯棒の曲がり形状に見合った所望の曲がり形状の成形ホースが得られる。また、押さえ部材の周面が、巻き掛けられたホースの断面を円形に保つためにホースの両側面を支持する円弧状の断面を備えるので、長手方向に沿って一貫して断面形状がより正確な円形を呈した、流体の搬送に対して有利な成形ホースが円滑に得られる。   Therefore, in the method according to the fourth feature configuration of the present invention, the jig is composed of a pressing member having a peripheral surface around which the hose can be wound. Therefore, the hose extends over a certain length along the peripheral surface of the pressing member. As a result, by setting the position of the pressing member and the direction of the circumferential surface of the pressing member as appropriate, the predetermined shape to be applied to the hose is a three-dimensional shape (at least two curved portions of the molded hose In the case where the shaft core is included in a shape that cannot be included in one plane), a molded hose having a desired bent shape corresponding to the bent shape of the vulcanized core rod can be obtained. In addition, since the circumferential surface of the holding member has an arc-shaped cross section that supports both side surfaces of the hose in order to keep the cross section of the wound hose circular, the cross sectional shape is consistently more accurate along the longitudinal direction. Thus, a molded hose having an excellent circular shape and advantageous for fluid conveyance can be obtained smoothly.

本発明の第5の特徴は、ホースが少なくとも2層のゴム層を有し、前記樹脂層は前記ゴム層の間に配置された熱可塑性フッ素樹脂層からなる点にある。   The fifth feature of the present invention is that the hose has at least two rubber layers, and the resin layer is composed of a thermoplastic fluororesin layer disposed between the rubber layers.

すなわち、本発明の第5の特徴構成による方法では、ホースが、加硫操作を施された後、冶具による拘束状態で室温まで冷却されるため、複数のゴム層の間に、塑性変形し難く、従って曲げ加工後にも元の直線形状に復元しようとする傾向の強い、耐ガソリン成分(炭化水素)透過性を備えた熱可塑性フッ素樹脂層がゴム層の間に介装されたホースにも適用できることとなり、その結果、得られた成形ホースを、光化学スモッグの原因となる炭化水素放出量を抑えた、しかも、他部品との干渉を避けるためにきつく湾曲した自動車用のフューエルホースにも十分に適用できる。   That is, in the method according to the fifth characteristic configuration of the present invention, the hose is cooled to room temperature in a restrained state by a jig after being subjected to vulcanization operation, so that it is difficult for plastic deformation between a plurality of rubber layers. Therefore, it is also applicable to hoses in which a thermoplastic fluororesin layer with gasoline-resistant (hydrocarbon) permeability is interposed between rubber layers, which tends to restore the original linear shape after bending. As a result, the molded hose obtained can be used as a fuel hose for automobiles that curb the release of hydrocarbons that cause photochemical smog and that are tightly curved to avoid interference with other parts. Applicable.

本発明の第6の特徴は、前記所定形状に含まれる湾曲部をホースの軸芯に沿った切断面に関して、ホース外周面が形成する最も小さな円弧の半径を、ホースの前記軸芯が形成する円弧の半径によって除した商をホース湾曲率と定義した時、前記ホース湾曲率が0.62以上に設定されている点にある。   The sixth feature of the present invention is that the shaft core of the hose forms a radius of the smallest arc formed by the outer peripheral surface of the hose with respect to the cut surface along the shaft core of the hose of the curved portion included in the predetermined shape. When the quotient divided by the radius of the arc is defined as the hose curvature, the hose curvature is set to 0.62 or more.

すなわち、自動車用のフューエルホースに多く見られるこのような内径と外径および湾曲部の湾曲率に関する寸法的条件を備えた形状のホースの場合には、内部に中芯を入れた本加硫を完了後、例えば室温或いは室温以下まで放冷後にホースのゴム層に損傷を与えることなく中芯を抜き取ることは困難であるが、本発明による、加硫後で放冷前のホースから中芯を抜き取った後、ホースの外面に外力を加える治具によってホースの外形を所定形状に保持しつつホースを室温或いは室温以下まで冷却するという方法を取れば、ゴム層に損傷を与えることなくホースを作製することが可能である。従って、本発明の第6の特徴構成による方法では、比較的に径が小さく、且つ、他部品との干渉を避けるためにきつく湾曲しているために成形の難しい、自動車用のフューエルホース、すなわち、湾曲部のホース湾曲率を、ホース外周面が形成する最も小さな円弧の半径を、ホースの前記軸芯が形成する円弧の半径によって除した商によって定義した時、例えばホース湾曲率が0.62に設定されているような、非常に曲げ加工の過酷なホースにも十分適用できる。   That is, in the case of a hose having a shape with such dimensional conditions regarding the inner diameter and outer diameter and the curvature of the curved portion, which are often found in automobile fuel hoses, the main vulcanization with a core inside is used. After completion, for example, after cooling to room temperature or below room temperature, it is difficult to remove the core without damaging the rubber layer of the hose. After removing the hose, the hose can be manufactured without damaging the rubber layer if the hose is cooled to room temperature or below room temperature while holding the hose in a predetermined shape with a jig that applies external force to the outer surface of the hose. Is possible. Therefore, in the method according to the sixth feature of the present invention, a fuel hose for an automobile, which has a relatively small diameter and is difficult to be molded because it is tightly curved to avoid interference with other parts, that is, When the hose curvature of the bending portion is defined by the quotient obtained by dividing the radius of the smallest arc formed by the hose outer peripheral surface by the radius of the arc formed by the shaft core of the hose, for example, the hose curvature is 0.62. It can be applied to a very hose that is extremely bent.

本発明の第7の特徴は、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造するための装置であって、
前記所定形状に対応する形状の中芯を内面側に挿入した状態のホースを加硫のために加熱し、次に、加硫後で放冷前のホースから中芯を抜き取った後に用いられ、ホースの外形を前記所定形状に保持するためにホースの外面に外力を加える当接部を有し、前記当接部によって外形を前記所定形状に保持したままホースを室温まで冷却可能に構成されている点にある。
A seventh feature of the present invention is an apparatus for producing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
The hose in a state where the core corresponding to the predetermined shape is inserted on the inner surface side is heated for vulcanization, and then used after removing the core from the hose after vulcanization and before cooling, In order to keep the outer shape of the hose in the predetermined shape, the outer surface of the hose has a contact portion that applies an external force, and the hose can be cooled to room temperature while the outer shape is held in the predetermined shape by the contact portion. There is in point.

したがって、本発明の第7の特徴構成による装置では、加硫後のホースから曲がり形状の中芯(マンドレル)を抜き取る操作を、ホースの放冷前のゴム層が未だ十分な柔軟性を保持している段階で行うので、たとえ曲がり形状の曲率半径が小さくても、同操作を比較的容易に実行できる。また、曲がり形状の中芯を抜き取った後のホースを室温まで冷却する操作を、ホースの外形を前記所定形状に保持しつつ行うために、ホースの外面に外力を加える治具を備えるので、ホースが予備加硫時の直線形状に戻ろうとすることなく、中芯の曲がり形状に即した所望の曲がり形状の成形ホースが円滑に得られる。   Therefore, in the apparatus according to the seventh characteristic configuration of the present invention, the rubber layer before cooling of the hose still retains sufficient flexibility in the operation of extracting the bent core (mandrel) from the hose after vulcanization. Therefore, even if the curvature radius of the bent shape is small, the operation can be executed relatively easily. In addition, in order to perform the operation of cooling the hose after extracting the bent core to room temperature while maintaining the outer shape of the hose in the predetermined shape, a jig for applying an external force to the outer surface of the hose is provided. Therefore, a molded hose having a desired bent shape conforming to the bent shape of the core can be obtained smoothly without trying to return to the linear shape at the time of preliminary vulcanization.

本発明の第8の特徴は、ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造するための装置であって、
直線状の第1中芯を内面側に挿入した状態のホースを予備加硫のために加熱し、前記第1中芯を抜き取り、次に、前記所定形状に対応する形状の第2中芯を内面側に挿入した状態のホースを加硫のために加熱し、さらに、加硫後で放冷前のホースから前記第2中芯を抜き取った後に用いられ、ホースの外形を前記所定形状に保持するためにホースの外面に外力を加える当接部を有し、前記当接部によって外形を前記所定形状に保持したままホースを室温まで冷却可能に構成されている点にある。
An eighth feature of the present invention is an apparatus for producing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
A hose with a linear first core inserted into the inner surface is heated for preliminary vulcanization, the first core is removed, and then a second core having a shape corresponding to the predetermined shape is removed. The hose inserted on the inner surface side is heated for vulcanization, and is used after the second core is removed from the hose after vulcanization and before cooling, to maintain the hose in the predetermined shape. In order to achieve this, there is a contact portion that applies an external force to the outer surface of the hose, and the hose can be cooled to room temperature while the outer shape is held in the predetermined shape by the contact portion.

したがって、本発明の第8の特徴構成による装置では、本加硫後のホースから曲がり形状の第2中芯(マンドレル)を抜き取る操作を、ホースの放冷前のゴム層が未だ十分な柔軟性を保持している段階で行うので、たとえ曲がり形状の曲率半径が小さくても、同操作を比較的容易に実行できる。また、曲がり形状の第2中芯を抜き取った後のホースを室温まで冷却する操作を、ホースの外形を前記所定形状に保持しつつ行うために、ホースの外面に外力を加える治具を備えるので、ホースが予備加硫時の直線形状に戻ろうとすることなく、第2中芯の曲がり形状に即した所望の曲がり形状の成形ホースが円滑に得られる。   Therefore, in the apparatus according to the eighth characteristic configuration of the present invention, the operation of removing the bent second core (mandrel) from the vulcanized hose is still flexible enough for the rubber layer before the hose to cool down. Therefore, even if the curvature radius of the curved shape is small, the operation can be executed relatively easily. In addition, in order to perform the operation of cooling the hose after removing the bent second core to room temperature while holding the outer shape of the hose in the predetermined shape, a jig for applying an external force to the outer surface of the hose is provided. The molded hose having a desired bent shape that conforms to the bent shape of the second core can be obtained smoothly without trying to return the hose to the linear shape at the time of preliminary vulcanization.

本発明の第9の特徴は、前記治具はホースの外周の長さの少なくとも三分の一にわたって外力を加えるように構成されている点にある。   A ninth feature of the present invention is that the jig is configured to apply an external force over at least one third of the outer circumference of the hose.

したがって、本発明の第9の特徴構成による装置では、前記治具がホースの側面を左右から挟み付けることによって、前記曲げ加工に基づくホースの扁平化を抑制することができ、その結果、長手方向に沿って一貫して断面形状が略円形で従って断面積も長手方向に沿って一定の、流体の搬送に対して有利な成形ホースが円滑に得られる。   Therefore, in the apparatus according to the ninth characteristic configuration of the present invention, the jig can suppress the flattening of the hose based on the bending process by sandwiching the side surface of the hose from the left and right. A molded hose which is advantageous for fluid conveyance can be obtained smoothly, with the cross-sectional shape being substantially circular along the cross-section and therefore the cross-sectional area being constant along the longitudinal direction.

本発明の第10の特徴は、前記当接部が、ホースを巻き掛け可能な押さえ部材の周面からなり、前記押さえ部材の前記周面は、巻き掛けられたホースの断面をより円形に保つためにホースの両側面を支持する円弧状の断面を備える点にある。   According to a tenth feature of the present invention, the abutting portion comprises a circumferential surface of a pressing member around which a hose can be wound, and the circumferential surface of the pressing member keeps a cross section of the wound hose more circular. Therefore, it is in the point provided with the circular-arc shaped cross section that supports both side surfaces of the hose.

したがって、本発明の第10の特徴構成による装置では、治具が、ホースを巻き掛け可能な周面を備えた押さえ部材からなるので、ホースを押さえ部材の周面に沿った或る程度の長さにわたって案内及び位置規制でき、その結果、押さえ部材の位置や押さえ部材の周面の向きを適宜に設定することによって、ホースに付与すべき所定形状が三次元形状(成形ホースの少なくとも2つの湾曲部を含む軸芯を一つの平面内に含ませることの出来ない形状)である場合にも、加硫芯棒の曲がり形状に見合った所望の曲がり形状の成形ホースが得られる。また、押さえ部材の周面が、巻き掛けられたホースの断面をより円形に保つためにホースの両側面を支持する円弧状の断面を備えるので、長手方向に沿って一貫して断面形状が従来技術のものに比してより円形を呈した、流体の搬送に対して有利な成形ホースが円滑に得られる。   Therefore, in the apparatus according to the tenth characteristic configuration of the present invention, the jig is composed of a pressing member having a peripheral surface around which the hose can be wound, and therefore, the hose has a certain length along the peripheral surface of the pressing member. As a result, the predetermined shape to be imparted to the hose is a three-dimensional shape (at least two curves of the molded hose) by appropriately setting the position of the pressing member and the direction of the circumferential surface of the pressing member. In the case of a shape in which the shaft core including the portion cannot be included in one plane), a molded hose having a desired bent shape corresponding to the bent shape of the vulcanized core rod can be obtained. In addition, since the circumferential surface of the holding member has an arc-shaped cross section that supports both side surfaces of the hose in order to keep the cross section of the hose that is wound more circular, the cross-sectional shape is consistently consistent with the longitudinal direction. A molded hose having a more circular shape than that of the technology and advantageous for fluid conveyance can be obtained smoothly.

本発明の第11の特徴は、フロアに載置可能なベース部と、前記ベース部に対して第1軸芯周りで揺動可能に支持された可動部とを有し、前記ベース部と前記可動部の一方に少なくとも2つの押さえ部材が設けられており、前記ベース部と前記可動部の他方に前記少なくとも2つの押さえ部材の間にホースの一部を押し込み可能な少なくとも1つの押さえ部材が設けられている点にある。   An eleventh feature of the present invention includes: a base portion that can be placed on a floor; and a movable portion that is swingably supported around the first axis with respect to the base portion. At least two pressing members are provided on one of the movable parts, and at least one pressing member capable of pressing a part of the hose between the at least two pressing members on the other of the base part and the movable part. It is in the point.

したがって、本発明の第11の特徴構成による装置では、ホースを例えばベース部に設けられた少なくとも2つの押さえ部材の上に載置し、可動部をベース部と近接するように揺動操作すれば、可動部に設けられた少なくとも1つの押さえ部材によって、ホースの一部が少なくとも2つの押さえ部材の間に押し込まれ、可動部をこの状態で固定し、ホースの温度が室温付近まで下がるまで装置の全体を放置すれば、湾曲部を安定して備えた成形ホースが得られる。そこで、このような押さえ部材の数や押さえ部材の位置を適宜に設定すれば、所定形状に対応する所望の形状の成形ホースが円滑に得られる。   Therefore, in the apparatus according to the eleventh characteristic configuration of the present invention, the hose is placed on, for example, at least two pressing members provided in the base portion, and the movable portion is swung so as to be close to the base portion. The part of the hose is pushed between the at least two pressing members by the at least one pressing member provided in the movable part, and the movable part is fixed in this state, and the hose temperature is lowered to near room temperature. If the whole is left alone, a molded hose having a curved portion stably can be obtained. Therefore, if the number of such pressing members and the positions of the pressing members are appropriately set, a molded hose having a desired shape corresponding to a predetermined shape can be obtained smoothly.

本発明の第12の特徴は、前記押さえ部材の軸芯が前記第1軸芯に対して傾斜して設けられている点にある。   A twelfth feature of the present invention resides in that an axis of the pressing member is provided inclined with respect to the first axis.

したがって、本発明の第12の特徴構成による装置では、押さえ部材の軸芯が第1軸芯に対して設置されているので、成形されたホースの向きが第1軸芯と直行する平面から傾斜した、三次元形状(成形ホースの少なくとも2つの湾曲部を含む軸芯を一つの平面内に含ませることの出来ない形状)を付与された付加価値の高い成形ホースを円滑に作製することができる。   Therefore, in the apparatus according to the twelfth feature configuration of the present invention, since the axis of the pressing member is installed with respect to the first axis, the direction of the molded hose is inclined from the plane perpendicular to the first axis. Thus, it is possible to smoothly produce a high value-added molded hose provided with a three-dimensional shape (a shape in which an axis including at least two curved portions of the molded hose cannot be included in one plane). .

本発明の第13の特徴は、前記押さえ部材がその回転位置を調節可能に、且つ、前記第1軸芯と平行な向きに沿って位置調節可能に構成されている点にある。   A thirteenth feature of the present invention resides in that the pressing member is configured such that its rotational position can be adjusted and the position can be adjusted along a direction parallel to the first axis.

したがって、本発明の第13の特徴構成による装置では、単一の装置を用いながらも、押さえ部材の回転位置を適宜調節し、押さえ部材の位置を第1軸芯と平行に移動させて適宜変更することによって、曲がり部の湾曲率や曲がり部の位置が互いに異なる複数の種類の成形ホースを作製可能となる。   Therefore, in the device according to the thirteenth feature configuration of the present invention, while using a single device, the rotation position of the pressing member is adjusted as appropriate, and the position of the pressing member is moved in parallel with the first axis to change as appropriate. By doing so, it is possible to produce a plurality of types of molded hoses with different curvature ratios and bent portion positions.

本発明の第14の特徴は、前記押さえ部材に加熱手段が設けられている点にある。   A fourteenth feature of the present invention is that the pressing member is provided with a heating means.

したがって、本発明の第14の特徴構成による装置では、前記所定形状に対応する形状の中芯(第2中芯)を内面側に挿入しての加硫(本加硫)を完全に行わず、本加硫工程の一部を残した状態で中芯を抜き取り、ホースを前記装置にセットし、そこで押さえ部材に設けられた加熱手段によってホースの湾曲部に対して残りの本加硫工程を実施し、その後、ホースの全体を冷却することで成形ホースを完成させるという使い方ができるので、所定形状に対応する形状の中芯の抜き取りをより円滑に行うことができ、結果的に、より曲がり方のきつい成形ホースを作製可能となる。   Therefore, in the device according to the fourteenth characteristic configuration of the present invention, the vulcanization (main vulcanization) is not performed completely by inserting the core (second core) corresponding to the predetermined shape into the inner surface side. The core is removed while leaving a part of the main vulcanization process, the hose is set in the apparatus, and the remaining main vulcanization process is performed on the curved portion of the hose by the heating means provided in the holding member. After that, it can be used to complete the molded hose by cooling the entire hose, so that the core corresponding to the predetermined shape can be extracted more smoothly, resulting in more bending It becomes possible to produce a tightly formed hose.

本発明の第15の特徴は、所定形状に保持されたホースを強制冷却する手段が設けられている点にある。   A fifteenth feature of the present invention is that a means for forcibly cooling a hose held in a predetermined shape is provided.

したがって、本発明の第15の特徴構成による装置では、本加硫を終えた或いは略終えたホースの冷却を迅速に行うことができる。尚、強制冷却する手段の具体的な形態としては、加工装置にセットされたホースの内面に冷却流体(空気などの気体または水などの液体)を流すことの可能な機構などで構成することができる。   Therefore, the apparatus according to the fifteenth characteristic configuration of the present invention can quickly cool the hose that has finished or substantially finished the vulcanization. In addition, as a specific form of the forced cooling means, it may be configured by a mechanism capable of flowing a cooling fluid (a gas such as air or a liquid such as water) through the inner surface of the hose set in the processing apparatus. it can.

本発明の第16の特徴は、前記ベース部と前記可動部の前記一方か前記他方に、ホースの内面に嵌り込むことでホースの一端を固定するための突起が設けられており、前記突起にホースを内面側から強制冷却するための流体を供給する孔が設けられている点にある。   According to a sixteenth feature of the present invention, a projection for fixing one end of the hose by being fitted to the inner surface of the hose is provided on the one or the other of the base portion and the movable portion. A hole for supplying a fluid for forcibly cooling the hose from the inner surface side is provided.

したがって、本発明の第16の特徴構成による装置では、本加硫を終えた或いは略終えたホースの一端を前記突起に被せ、ホースの各湾曲部を当接部に当てた状態でホースを装置にセットし、前記突起の孔を介してホースの内側に冷却用流体を流すことができるので、成形ホースの作製をより効率的に実施できる。   Accordingly, in the apparatus according to the sixteenth feature of the present invention, the hose is installed in a state in which one end of the hose which has been or has almost finished vulcanization is covered with the projection, and each curved part of the hose is applied to the contact part. Since the cooling fluid can be flowed to the inside of the hose through the hole of the protrusion, the molded hose can be produced more efficiently.

本発明によるその他の特徴および利点は、以下図面を用いた実施形態の説明により明らかになるであろう。   Other features and advantages of the present invention will become apparent from the following description of embodiments using the drawings.

本発明の実施形態の一例について図面に基づいて以下に解説する。本発明による、成形ホースを製造する方法および同方法に用いる装置は、ゴム層と同ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースの作製に用いることができる。しかし、図1に例示する、自動車等に用いる燃料供給用ホース50に適用した場合には、その発明の有効性を最も発揮できる。   An example of an embodiment of the present invention will be described below based on the drawings. A method for producing a molded hose and an apparatus used for the method according to the present invention are used for producing a molded hose having a rubber layer and a resin layer laminated on the rubber layer and bent into a predetermined shape. be able to. However, when applied to the fuel supply hose 50 used in an automobile or the like illustrated in FIG. 1, the effectiveness of the invention can be exhibited most.

燃料供給用ホース50は、図1(ロ)に示すように、内層50a、外層50c、及び内層50aと外層50cの間に介装された中間層50bとから構成されている。内層50aには耐ガソリン性とシール性が求められるためにFKM(フッ素ゴム)が、外層50cには弾力性と耐候性と耐熱性などが求められるためにECO(エピクロルヒドリンゴム)が選択されている。そして、中間層50bにはガソリンなどの炭化水素の透過を規制する機能を備えた熱可塑性フッ素樹脂として、フッ化ビニリデンと六フッ化プロピレンと四フッ化エチレンとの3元共重合体(略称THV、商品名を挙げれば、例えばDyneon社製のTHV500G、THV610、THV815)が採用されている。但し、内層としてはNBR(ニトリルゴム)等を用いても良く、外層としてはCSM(クロロスルホン化ポリエチレン)等を用いても良い。また、中間層としては、上述したTHVの他に、エチレンと四フッ化エチレンとの共重合体(ETFE)、六フッ化プロピレンと四フッ化エチレンとの共重合体(FEP)、ポリフッ化ビニリデン(PVDF)、四フッ化エチレン・パーフルオロアルコキシエチレン共重合体(PFA)、ポリ四フッ化エチレン(PTFE)、三フッ化塩化エチレン(PCTFE)、三フッ化塩化エチレン・エチレン共重合体(ECTFE)等のフッ素樹脂、或いは、ナイロン等を用いても良い。
尚、上述の例のように一層からなる内層50aではなく、例えば、内側に配置されたFKMと、外側に配置されたECOとからなる2層状の内層とするなど、多層状の内層としても良い。外層50c及び中間層50bについても同様で、多層状の外層或いは多層状の中間層としても良い。
また、必ずしも上述の例のように樹脂製の中間層の外側にゴムによる外層を設けなくても良い。すなわち、この場合、燃料供給用ホースは、ゴムによる内層とその外側を被覆する樹脂製の外層のみで構成される。同様に、必ずしも上述の例のように樹脂製の中間層の内側にゴムによる内層を設けなくても良い。この場合、燃料供給用ホースは、樹脂からなる内層とその外側を被覆するゴム製の外層のみで構成される。
As shown in FIG. 1B, the fuel supply hose 50 includes an inner layer 50a, an outer layer 50c, and an intermediate layer 50b interposed between the inner layer 50a and the outer layer 50c. FKM (fluoro rubber) is selected for the inner layer 50a because gasoline resistance and sealing properties are required, and ECO (epichlorohydrin rubber) is selected for the outer layer 50c because elasticity, weather resistance, heat resistance, and the like are required. . The intermediate layer 50b includes a terpolymer (abbreviated as THV) of vinylidene fluoride, propylene hexafluoride, and tetrafluoroethylene as a thermoplastic fluororesin having a function of restricting permeation of hydrocarbons such as gasoline. For example, THV500G, THV610, and THV815 manufactured by Dyneon are used. However, NBR (nitrile rubber) or the like may be used as the inner layer, and CSM (chlorosulfonated polyethylene) or the like may be used as the outer layer. As the intermediate layer, in addition to the above-mentioned THV, a copolymer of ethylene and tetrafluoroethylene (ETFE), a copolymer of propylene hexafluoride and tetrafluoroethylene (FEP), polyvinylidene fluoride (PVDF), tetrafluoroethylene / perfluoroalkoxyethylene copolymer (PFA), polytetrafluoroethylene (PTFE), ethylene trifluoride chloride (PCTFE), ethylene trifluoride chloride / ethylene copolymer (ECTFE) ), Etc., or nylon may be used.
Instead of the single-layer inner layer 50a as in the above-described example, a multi-layer inner layer may be used, for example, a two-layer inner layer including an FKM disposed on the inner side and an ECO disposed on the outer side. . The same applies to the outer layer 50c and the intermediate layer 50b, and a multilayer outer layer or a multilayer intermediate layer may be used.
Moreover, it is not always necessary to provide an outer layer of rubber on the outer side of the resin intermediate layer as in the above example. That is, in this case, the fuel supply hose is constituted only by an inner layer made of rubber and an outer layer made of resin that covers the outer side. Similarly, it is not always necessary to provide a rubber inner layer inside the resin intermediate layer as in the above example. In this case, the fuel supply hose is composed only of an inner layer made of resin and an outer layer made of rubber covering the outside.

燃料供給用ホース50の太さに関する寸法は内径が17mm、外径が23mm、ホースを形成する側壁部の厚さが3mmであるが、他にも、少なくとも、内径が6〜37.5mmで、外径が11〜46mmの範囲のホースであれば適用できる。
また、燃料供給用ホース50は、ガソリンタンクからエンジンに至る供給経路上にある種々の周辺部材との干渉を避ける目的で、図1(イ)に示すような所定の湾曲形状を有する。因みに、最も曲がり方の急な第2湾曲部V2と第3湾曲部V3の曲率半径は40mmであり、湾曲部V2の前後に位置する略直線状のホース部どうしは約90°の角度をなしている。湾曲部V3の前後に位置する略直線状のホース部についても同様である。
Regarding the thickness of the fuel supply hose 50, the inner diameter is 17 mm, the outer diameter is 23 mm, and the thickness of the side wall forming the hose is 3 mm. In addition, at least the inner diameter is 6 to 37.5 mm, Any hose having an outer diameter of 11 to 46 mm can be applied.
Further, the fuel supply hose 50 has a predetermined curved shape as shown in FIG. 1A for the purpose of avoiding interference with various peripheral members on the supply path from the gasoline tank to the engine. Incidentally, the curvature radius of the second bending portion V2 and the third bending portion V3 that are the steepest bends is 40 mm, and the substantially linear hose portions positioned before and after the bending portion V2 form an angle of about 90 °. ing. The same applies to the substantially linear hose portion positioned before and after the curved portion V3.

燃料供給用ホース50を作製する際に用いられる工程について、以下に概略的に説明する。
<第1工程>先ず、図2に例示するような、長尺で直線状の第1中芯11と、第1押出し機12と、第2押出し機13と、第3押出し機14とを備えたホース製造ライン10によって、3層からなる未加硫の直線状のホース40を成形する。第1押出し機12は、第1中芯11の外周にFKM(フッ素ゴム)からなる内層51を押出し成形し、第2押出し機13は内層51の上にTHV熱可塑性フッ素樹脂からなる中間層52を押出し成形し、第3押出し機14は中間層52の上にECO(エピクロルヒドリンゴム)からなる外層53を押出し成形する。このホース製造ライン10によって、第1中芯11上に得られる長尺のホース40の各ゴム層は、未加硫であり、概して粘土状を呈している。
The process used when producing the fuel supply hose 50 will be schematically described below.
<First Step> First, as shown in FIG. 2, a long and straight first core 11, a first extruder 12, a second extruder 13, and a third extruder 14 are provided. An unvulcanized linear hose 40 consisting of three layers is formed by the hose production line 10. The first extruder 12 extrudes an inner layer 51 made of FKM (fluoro rubber) on the outer periphery of the first core 11, and the second extruder 13 has an intermediate layer 52 made of THV thermoplastic fluororesin on the inner layer 51. The third extruder 14 extrudes and forms an outer layer 53 made of ECO (epichlorohydrin rubber) on the intermediate layer 52. Each rubber layer of the long hose 40 obtained on the first core 11 by the hose production line 10 is unvulcanized and generally has a clay shape.

<第2工程>ホース40から第1中芯11を抜き取り、ホース40を、一旦所定のドラム15の外周面に巻き取り、同ドラム15に巻き取られた状態のホース40を加硫缶16内に収納して所定の温度条件下で加熱することで各ゴム層を予備加硫し、引き続き、放冷する。これによって、幾らかの弾力性を備えた予備加硫済みのホース41が得られる。
<第3工程>図2に示すように、加硫缶16から取り出したドラム15の外周面から予備加硫済みのホース41を巻き戻して、適当な長さに裁断し、図3に矢印で示すように、予備加硫済みのホース41に所定の湾曲形状に曲げられた第2中芯17を挿入する。
<第4工程>図4に例示するように、第2中芯17に外嵌させたホース41を、適当なオーブン18または加硫缶内にて所定の温度条件下で加熱することで各ゴム層を本加硫する。
<第5工程>本加硫を終えたホース42を第2中芯17と共にオーブン18または加硫缶から取り出し、図5に矢印で示すように、直ぐに(放冷される前の、ホース42が十分な柔軟性を保持している間に)第2中芯17を抜き取り、次に、やはり放冷される前に、図7から図9に示すホース拘束冶具1にセットし、そのまま、ホース42の外形をホース拘束冶具1によって所定形状に保持しつつ、ホース42が室温になるまで放冷する。
<第6工程>図9に示すように、放冷済みのホース42を、十分な弾力性を備えた完成した燃料供給用ホース50(成形ホース)として、ホース拘束冶具1から取り出す。
<Second Step> The first core 11 is removed from the hose 40, the hose 40 is temporarily wound around the outer peripheral surface of the predetermined drum 15, and the hose 40 wound around the drum 15 is placed in the vulcanizing can 16. Each rubber layer is pre-vulcanized by being stored in a container and heated under a predetermined temperature condition, and then allowed to cool. This provides a pre-cured hose 41 with some elasticity.
<Third Step> As shown in FIG. 2, the pre-cured hose 41 is unwound from the outer peripheral surface of the drum 15 taken out from the vulcanizing can 16 and cut into an appropriate length. As shown, the second core 17 bent into a predetermined curved shape is inserted into the pre-cured hose 41.
<Fourth Step> As illustrated in FIG. 4, each hose 41 fitted on the second core 17 is heated in a suitable oven 18 or a vulcanizing can under a predetermined temperature condition. The layer is fully vulcanized.
<Fifth Step> The hose 42 that has been subjected to the main vulcanization is taken out of the oven 18 or the vulcanization can together with the second core 17, and immediately (as before hose cooling, the hose 42 The second core 17 is pulled out (while retaining sufficient flexibility), and then set on the hose restraining jig 1 shown in FIGS. The hose 42 is allowed to cool to room temperature while the outer shape is held in a predetermined shape by the hose restraining jig 1.
<Sixth Step> As shown in FIG. 9, the cooled hose 42 is taken out from the hose restraining jig 1 as a completed fuel supply hose 50 (formed hose) having sufficient elasticity.

図7から図9に示すように、ホース拘束冶具1は、フロア等に載置可能な矩形筐体状のベース部2と、ベース部2に対して第1軸芯X1周りで揺動可能に支持された多数の揺動アーム3(可動部の一例)とを有する。
図7に示すように、ベース部2は、一対のほぼ垂直な側板21を有し、これらの一対の側板21の間には、いずれも丸棒で構成された、第1シャフト22a、第2シャフト22b、及び、第3シャフト22cが、水平に且つ側板21に対して垂直に延びている。第2シャフト22bと第3シャフト22cは互いに同じ高さに配置されている。
ホース拘束冶具1を操作する作業者(不図示)から見て最も後方に位置する第1シャフト22aには、各揺動アーム3が回動自在に支持されている。各揺動アーム3は互いに独立した形で回動操作される。そして、前後の中央付近に位置する第2シャフト22bには、揺動アーム3の数と同じ数量のコロ30a(押さえ部材の一例)が、第2シャフト22bの長手方向に沿ってほぼ等間隔で外嵌固定されている。また、手前側に位置する第3シャフト22cにも、やはり揺動アーム3の数と同じ数量のコロ30bがほぼ等間隔で外嵌固定されている。
As shown in FIGS. 7 to 9, the hose restraining jig 1 is capable of swinging around a first axis X <b> 1 with respect to a base 2 having a rectangular housing shape that can be placed on a floor or the like, and the base 2. And a large number of supported swing arms 3 (an example of a movable part).
As shown in FIG. 7, the base portion 2 has a pair of substantially vertical side plates 21, and between the pair of side plates 21, a first shaft 22 a and a second shaft, both of which are configured by round bars. The shaft 22 b and the third shaft 22 c extend horizontally and perpendicular to the side plate 21. The second shaft 22b and the third shaft 22c are arranged at the same height.
Each swing arm 3 is rotatably supported on the first shaft 22a located at the rearmost side as viewed from an operator (not shown) who operates the hose restraining jig 1. Each swing arm 3 is rotated in an independent manner. Then, on the second shaft 22b located near the front and rear centers, rollers 30a (an example of a pressing member) of the same number as the number of swing arms 3 are arranged at substantially equal intervals along the longitudinal direction of the second shaft 22b. The outer fitting is fixed. Also, the same number of rollers 30b as the number of the swinging arms 3 are fitted and fixed to the third shaft 22c located on the near side at substantially equal intervals.

さらに、一対の側板21の間には、いずれも断面が矩形の細長い板材で構成された、第1ビーム23a、第2ビーム23b、第3ビーム23c、及び、第4ビーム23dが水平に且つ側板21に対して垂直に延びている。
第1ビーム23aには、各ホースの内面に嵌り込むことでホース42の先端を固定するための突起24が、揺動アーム3の数と同じ数だけ設けられている。ホース42の各湾曲部を各コロ30に対して正確に位置決めするために、ホース42を突起24に被せる時、ホース42の先端が突起24の全長を覆い隠すと同時に第1ビーム23aの面に接当するように実施する。
次に、第2ビーム23b、第3ビーム23c、及び、第4ビーム23dの各々には、ホース42を上方から嵌め込むことの可能な溝状案内部25が、揺動アーム3の数と同じ数だけ設けられている。溝状案内部25は、ホース42の外面を下方と左右から支持することでホース42を上下方向と左右方向に関して位置決めする機能を果たす。
Further, between the pair of side plates 21, the first beam 23a, the second beam 23b, the third beam 23c, and the fourth beam 23d, all of which are made of a long and narrow plate having a rectangular cross section, are horizontally disposed on the side plate. 21 extends vertically.
The first beam 23 a is provided with the same number of protrusions 24 as the number of the swing arms 3 for fixing the tip of the hose 42 by being fitted to the inner surface of each hose. In order to accurately position each curved portion of the hose 42 with respect to each roller 30, when the hose 42 is put on the projection 24, the tip of the hose 42 covers the entire length of the projection 24 and simultaneously on the surface of the first beam 23 a. We carry out to touch.
Next, in each of the second beam 23b, the third beam 23c, and the fourth beam 23d, groove-shaped guide portions 25 into which the hose 42 can be fitted from above are the same as the number of the swing arms 3. There are as many as there are. The groove-shaped guide portion 25 functions to position the hose 42 in the vertical direction and the horizontal direction by supporting the outer surface of the hose 42 from below and from the left and right.

さらに、一対の側板21の一端には、一本の板材またはアングル等で構成された第5ビーム26が水平に且つ側板21に対して垂直に延びている。第5ビーム26には、音叉を逆さまにした形状で、各揺動アーム3の遊端3aと係止可能なストッパ部材27が、揺動アーム3の数と同じ数だけ設けられている。
各揺動アーム3にも、コロ30cとコロ30dとが揺動アーム3の長手方向に沿って互いに離間して設けられている。ベース部2側のコロ30a、30bはベース部2に対して回転不能に設けられており、揺動アーム3側のコロ30cとコロ30dも揺動アーム3に対して回転不能に設けられている。尚、各コロ30a、30b、30c、30d(いずれも押さえ部材の一例)は合成樹脂によって形成されている。コロ30を除くホース拘束冶具1の構成部品は、いずれもステンレススチールなどの鋼鉄からなる。但し、ベース部2側のコロ30a、30b及び揺動アーム3側のコロ30cとコロ30dの一部或いは全部を、ベース部2又は揺動アーム3に対して回転自在に設けても良い。
また、各揺動アーム3には、ホース42の一部を第2ビーム23bの溝状案内部25の底部に押し付け可能な箱状などの押し付け部材28が設けられている。
Further, at one end of the pair of side plates 21, a fifth beam 26 formed of a single plate material or an angle extends horizontally and perpendicularly to the side plates 21. The fifth beam 26 is provided with the same number of stopper members 27 that can be engaged with the free ends 3a of the respective swing arms 3 in the shape in which the tuning fork is turned upside down.
Each swing arm 3 is also provided with a roller 30c and a roller 30d spaced apart from each other along the longitudinal direction of the swing arm 3. The rollers 30 a and 30 b on the base portion 2 side are provided so as not to rotate with respect to the base portion 2, and the rollers 30 c and 30 d on the swing arm 3 side are also provided non-rotatable with respect to the swing arm 3. . The rollers 30a, 30b, 30c, and 30d (all of which are examples of pressing members) are made of synthetic resin. The constituent parts of the hose restraining jig 1 excluding the roller 30 are all made of steel such as stainless steel. However, some or all of the rollers 30 a and 30 b on the base portion 2 side and the rollers 30 c and 30 d on the swing arm 3 side may be rotatably provided to the base portion 2 or the swing arm 3.
Each swing arm 3 is provided with a pressing member 28 such as a box that can press a part of the hose 42 against the bottom of the groove-shaped guide portion 25 of the second beam 23b.

そこで、前述の第5工程について、ホース拘束冶具1の構成に沿って具体的に解説すると以下のようになる。
先ず、図5に示すように、オーブン17または加硫缶内での本加硫を終えたホース42から第2中芯16を抜き取ると、直ぐに、図7及び図8に例示するように、ホース42の先端をホース拘束冶具1の突起24に差し込み、ホース42の先端よりも少し手前側の部位を第2ビーム23bの溝状案内部25内に嵌め込み、ホース42の先端に最も近い第1湾曲部V1と第3湾曲部V3とを、それぞれ第2シャフト22bのコロ30aと第3シャフト22cのコロ30bの周面に巻き掛け、ホース42の残りの部位を第3ビーム23cと第4ビーム23dの溝状案内部25内に嵌め込む。
Therefore, the fifth process described above will be specifically described along the configuration of the hose restraining jig 1 as follows.
First, as shown in FIG. 5, as soon as the second core 16 is removed from the hose 42 that has been subjected to the main vulcanization in the oven 17 or the vulcanizing can, as illustrated in FIGS. 7 and 8, The tip of 42 is inserted into the protrusion 24 of the hose restraining jig 1, and a portion slightly closer to the tip of the hose 42 is fitted into the groove-shaped guide portion 25 of the second beam 23 b, and the first curve closest to the tip of the hose 42 is inserted. The portion V1 and the third bending portion V3 are wound around the peripheral surfaces of the roller 30a of the second shaft 22b and the roller 30b of the third shaft 22c, respectively, and the remaining portions of the hose 42 are wound on the third beam 23c and the fourth beam 23d. Is fitted into the groove-shaped guide portion 25.

次に、揺動アーム3を手前側に揺動操作して、ベース部2に近付けて行くと、先ず、ホース42の一部が揺動アーム3のコロ30cとコロ30dの各周面内に入り込み、揺動アーム3を更にベース部2に近付けると、揺動アーム3のコロ30cがホース42の一部(第2湾曲部V2になる部位)を、ベース部2側のコロ30aとコロ30bの間に押し込み、揺動アーム3のコロ30dがホース42の別の一部(第4湾曲部V4になる部位)を、ベース部2側の第3ビーム23cの溝状案内部25と第4ビーム23dの溝状案内部25の各底部に押し付ける。尚、コロ30cとコロ30dは揺動アーム3に対して回転自在に設けられているので、ホース42が既に若干直線状に戻り始めていても、揺動アーム3のコロ30cとコロ30dはその各周面内にホース42をスムースに受け入れ、ホース42の湾曲部V2,V4を所定の高さ位置まで押し下げることができる。   Next, when the swing arm 3 is swung to the near side and moved closer to the base portion 2, first, a part of the hose 42 is placed in each peripheral surface of the rollers 30c and 30d of the swing arm 3. When the swing arm 3 is further moved closer to the base portion 2, the roller 30 c of the swing arm 3 moves a part of the hose 42 (the portion that becomes the second curved portion V 2) to the roller 30 a and the roller 30 b on the base portion 2 side. The roller 30d of the oscillating arm 3 is pushed into another part of the hose 42 (the portion that becomes the fourth curved portion V4) and the groove-shaped guide portion 25 of the third beam 23c on the base portion 2 side and the fourth portion. It presses against each bottom part of the groove-shaped guide part 25 of the beam 23d. Since the rollers 30c and 30d are rotatably provided with respect to the swing arm 3, even if the hose 42 has already begun to return to a straight line, the rollers 30c and 30d of the swing arm 3 can be The hose 42 can be smoothly received in the peripheral surface, and the curved portions V2 and V4 of the hose 42 can be pushed down to a predetermined height position.

揺動アーム3が十分にベース部2に近付いたら、ストッパ部材27を揺動アーム3の遊端3aに係止することで揺動アーム3を固定する。これでホース42のホース拘束冶具1への設置が完了する(ホース42が嵌め込まれ、ストッパ部材27が係止された状態を示す図8を参照)。
引き続き、残りのホース42も、オーブン17または加硫缶から出し、第2中芯16を抜き取り、同様にホース拘束冶具1に設置し、全てのホース42の温度が室温近くになるまで放置する。
全てのホース42が室温近く(または室温以下)になるまで放冷(または冷却)されたら、図9に例示するように、ストッパ部材27を揺動アーム3の遊端3aから外し、揺動アーム3を上方に揺動操作して、ベース部2から引き離し、各ホース42を完成した燃料供給用ホース50(成形ホース)として取り出すことができる。
When the swing arm 3 is sufficiently close to the base portion 2, the swing arm 3 is fixed by locking the stopper member 27 to the free end 3 a of the swing arm 3. This completes the installation of the hose 42 to the hose restraining jig 1 (see FIG. 8 showing a state in which the hose 42 is fitted and the stopper member 27 is locked).
Subsequently, the remaining hoses 42 are also taken out from the oven 17 or the vulcanizing can, the second core 16 is extracted, and similarly installed in the hose restraining jig 1, and left until the temperature of all the hoses 42 is close to room temperature.
When all the hoses 42 are allowed to cool (or cool) to near room temperature (or below room temperature), the stopper member 27 is removed from the free end 3a of the swing arm 3 as illustrated in FIG. 3 can be moved upward and pulled away from the base portion 2 to take out each hose 42 as a completed fuel supply hose 50 (molded hose).

尚、コロ30a、30b、30c、30dの周面(当接部の一例)は、いずれもホース42の外面を構成する円の曲率半径よりも僅かに大きな曲率半径を持った円弧状の断面を備えている。例えば、コロ30aを直径方向に沿って切断した時に得られる断面に見られる円弧状の内面の輪郭線Fは、図6に示されるように、ホース42の断面を構成する円の約半分(「少なくとも三分の一」の一例)を包含するように設定されている。残りのコロ30b、30c、30dについても同様である。従って、コロ30a、30b、30c、30dは、輪郭線Fに対応する内面を介して、ホース42の円形の外周の長さの少なくとも三分の一にわたってホース42の外面に、ホース42の外形を所望の所定形状に保持する(或いは矯正する)ための外力を加えることができ、しかも、巻き掛けられたホース42を前記内面によって左右から支持して、ホース42の断面を略円形に保つことによって、湾曲部においてホース42が平坦化する(潰れて長円化する)傾向を効果的に抑制することができる。   Incidentally, the peripheral surfaces of the rollers 30a, 30b, 30c, and 30d (an example of a contact portion) all have an arc-shaped cross section having a radius of curvature slightly larger than the radius of curvature of the circle constituting the outer surface of the hose 42. I have. For example, the outline F of the arc-shaped inner surface seen in the cross section obtained when the roller 30a is cut along the diametrical direction is approximately half of the circle constituting the cross section of the hose 42 as shown in FIG. An example of “at least one third”. The same applies to the remaining rollers 30b, 30c, 30d. Accordingly, the rollers 30a, 30b, 30c, and 30d have the outer shape of the hose 42 formed on the outer surface of the hose 42 through the inner surface corresponding to the contour line F over at least one third of the length of the circular outer periphery of the hose 42. By applying an external force for holding (or correcting) the desired predetermined shape, the hose 42 wound around is supported by the inner surface from the left and right sides, and the cross section of the hose 42 is maintained in a substantially circular shape. In addition, the tendency that the hose 42 is flattened (crushed and elongated) in the curved portion can be effectively suppressed.

また、本実施形態で例として挙げた燃料供給用ホース50を対象としているホース拘束冶具1に関していえば、コロ30a、30b、30c、30dはいずれも第1軸芯X1に対して捩れるように傾斜した軸芯を備えている。各コロ30a、30b、30c、30dの軸芯どうしも平行ではなく、互いに交差するように構成されている。この構成のために、ホース拘束冶具1は、燃料供給用ホース50のような、ホースに三次元形状(成形ホースの少なくとも2つの湾曲部を含む曲がった軸芯を一つの平面内に含ませることの出来ない形状)を付与することが可能となる。   Further, regarding the hose restraining jig 1 for the fuel supply hose 50 exemplified as an example in the present embodiment, the rollers 30a, 30b, 30c, and 30d are all twisted with respect to the first axis X1. It has an inclined axis. The cores of the rollers 30a, 30b, 30c, and 30d are not parallel to each other, but are configured to intersect each other. For this configuration, the hose restraining jig 1 includes a hose, such as a fuel supply hose 50, having a three-dimensional shape (a bent shaft including at least two curved portions of the molded hose in one plane). It is possible to give a shape that cannot be obtained.

因みに、種々の断面寸法のホースについて、90°曲げの加工(所定形状の一例)が可能か否かを、ホースの湾曲部における軸芯Pの曲率半径R(中心Rと称する場合もある)毎に判定した実験の結果を、添付した図11の図表に示す。90°曲げの加工とは、図10に例示するように、湾曲部を挟んで隣接する略直線状の部位L1、L2どうしが90°をなすように曲がった状態に成形する加工を指す。図11の図表の最も左の列に記された6から37.5の4つの数値はホースの内径D1を示す数値(mm)であり、因みに、内径D1が6mm、7.6mm、17mm、37.5mmの各ホースの外径D2はそれぞれ11mm、14mm、23mm、46mmであった。また、図11の図表の最も上の行に記された10から85の16個の数値はホース軸芯Pの曲率半径R(mm)を示す数値である。図表中の○印は円滑に成形が可能であったことを示し、△印は前記第5工程における、本加硫を終えオーブン17または加硫缶から取り出したホース42から第2中芯16を抜き取る操作を特に注意深く行えば成形が可能であったことを示し、×印は成形が不可能であったことを示す。図11の図表からは、一般的に内径D1が大きく同時に曲率半径Rが小さくなる程、90°曲げの加工が困難になる傾向が読み取られる。   Incidentally, whether or not 90 ° bending (an example of a predetermined shape) is possible for a hose having various cross-sectional dimensions is determined for each radius of curvature R (also referred to as the center R) of the shaft core P in the curved portion of the hose. The result of the experiment determined in Fig. 11 is shown in the attached chart of Fig. 11. As illustrated in FIG. 10, the 90 ° bending process refers to a process in which the substantially linear portions L1 and L2 adjacent to each other with the curved portion interposed therebetween are bent so as to form 90 °. Four numerical values from 6 to 37.5 shown in the leftmost column of the chart of FIG. 11 are numerical values (mm) indicating the inner diameter D1 of the hose. Incidentally, the inner diameter D1 is 6 mm, 7.6 mm, 17 mm, 37 The outer diameter D2 of each 5 mm hose was 11 mm, 14 mm, 23 mm, and 46 mm, respectively. Further, 16 numerical values from 10 to 85 written in the uppermost line of the chart of FIG. 11 are numerical values indicating the radius of curvature R (mm) of the hose shaft core P. The circles in the chart indicate that molding was possible smoothly, and the triangles indicate that the second core 16 was removed from the hose 42 that had been subjected to the final vulcanization and was removed from the oven 17 or vulcanization can in the fifth step. If the extraction operation is particularly carefully performed, it indicates that molding was possible, and a cross indicates that molding was impossible. From the chart of FIG. 11, it can be seen that, generally, the larger the inner diameter D1 and the smaller the radius of curvature R, the more difficult the 90 ° bending process becomes.

次に、図12の図表は、図11に実験結果を示した各ホースの湾曲部について、そのホース湾曲率Cを、軸芯Pの曲率半径R毎に算出した結果を示す。ここで、ホース湾曲率Cとは、ホースの湾曲部を軸芯Pに沿った切断面において、ホース外周面が形成する最も小さな円弧の半径、すなわち、図10に示す半径rを、軸芯Pが形成する円弧の半径R(曲率半径R)によって除した商(r/R)によって定義される値であり、原則的にホース湾曲率Cが小さいほど曲げ加工の困難性が高い。図12の図表に示されるホース湾曲率Cを、図11の実験結果と見比べると、本発明の製造方法とホース拘束冶具1によって成形した場合、ホース湾曲率Cが0.62以上の条件で90°曲げの加工が可能(○または△)であることが判る。   Next, the chart of FIG. 12 shows the result of calculating the hose curvature C for each radius of curvature R of the shaft core P for the curved portion of each hose whose experimental results are shown in FIG. Here, the hose bending rate C is the radius of the smallest arc formed by the outer peripheral surface of the hose at the cut surface of the hose along the axis P, that is, the radius r shown in FIG. Is a value defined by the quotient (r / R) divided by the radius R (curvature radius R) of the arc formed, and in principle, the smaller the hose curvature C, the higher the difficulty of bending. When the hose curvature C shown in the chart of FIG. 12 is compared with the experimental results of FIG. 11, when the hose curvature C is 0.62 or more when formed by the manufacturing method of the present invention and the hose restraining jig 1, the hose curvature C is 90. ° It can be seen that bending is possible (○ or △).

より具体的な例としては、これらの図表から、本発明による製造方法とホース拘束冶具1を用いれば、例えば、内径が17mmの燃料供給用ホース50の場合、湾曲部の曲率半径が40mm以上であれば円滑な成形が可能であることが判る。同様に、内径が6mmの燃料供給用ホースの場合には曲率半径が20mm以上であれば、内径が7.6mmの燃料供給用ホースの場合には曲率半径が25mm以上であれば、そして、内径が37.5mmの燃料供給用ホースの場合には曲率半径が75mm以上であれば円滑な成形が可能であることが判る。
〔別実施形態〕
As a more specific example, from these diagrams, if the manufacturing method according to the present invention and the hose restraining jig 1 are used, for example, in the case of the fuel supply hose 50 having an inner diameter of 17 mm, the curvature radius of the curved portion is 40 mm or more. It can be seen that smooth molding is possible. Similarly, in the case of a fuel supply hose having an inner diameter of 6 mm, if the radius of curvature is 20 mm or more, in the case of a fuel supply hose having an inner diameter of 7.6 mm, if the radius of curvature is 25 mm or more, and In the case of a 37.5 mm fuel supply hose, it can be seen that smooth molding is possible if the radius of curvature is 75 mm or more.
[Another embodiment]

<1>コロ30a、30b、30c、30dがその回転位置を調節可能に、且つ、第1軸芯X1と平行な向きに沿って位置調節可能に構成することも可能である。この構成の具体的な実現方法としては、例えば、コロ30aについて述べれば、各コロ30aを第2シャフト22bに対して回動不能に設け、さらに、第2シャフト22bを、ベース部2の側板21に対して複数の回転姿勢の間で回動可能で、且つ、ベース部2の側板21に対して左右にスライド移動可能となるように設け、同時に、選択されたいずれかの回転姿勢と左右の任意のスライド位置に固定可能にすれば良い。他のコロ30b、30c、30dについても同様な方法で回転位置を調節可能に、且つ、第1軸芯X1と平行な向きに沿って位置調節可能に構成することができる。このように構成すれば、一台のホース拘束冶具1を、互いに三次元形状が異なる複数の種類の燃料供給用ホースに適用可能となる。 <1> The rollers 30a, 30b, 30c, and 30d can be configured such that their rotational positions can be adjusted and the positions can be adjusted along the direction parallel to the first axis X1. As a concrete realization method of this configuration, for example, when describing the rollers 30a, each roller 30a is provided so as not to be rotatable with respect to the second shaft 22b, and the second shaft 22b is provided on the side plate 21 of the base portion 2. Is provided so as to be able to rotate between a plurality of rotational postures and to be slidable to the left and right with respect to the side plate 21 of the base portion 2. What is necessary is just to make it fixable in arbitrary slide positions. The other rollers 30b, 30c, and 30d can also be configured so that the rotational position can be adjusted by the same method and the position can be adjusted along the direction parallel to the first axis X1. If comprised in this way, it will become possible to apply one hose restraint jig 1 to a plurality of types of fuel supply hoses having different three-dimensional shapes.

<2>コロ30a、30b、30c、30dを、例えば形状の同じ鋼製の或いは耐熱性の高い樹脂製のコロとし、この耐熱性のコロの内部に加熱手段を設けることが可能である。このように構成すれば、例えば、所定形状に対応する形状の第2中芯を内面側に挿入しての加硫(本加硫)を完全に行わず、本加硫工程の最終段階の一部を残した状態で中芯を抜き取り、ホースをホース拘束冶具1にセットし、そこでコロに設けられた前記加熱手段によってホースの湾曲部に対して残りの本加硫工程を実施し、その後、ホースの全体を冷却することで成形ホースを完成させるという使い方ができる。この方法によれば、本加硫工程を最後まで進めずに(ゴム層の柔軟性が未だ高い間に)第2中芯を抜くので、第2中芯の抜き取りをより円滑に行うことができ、結果的に、より曲がりのきつい成形ホースを作製可能となる。 <2> The rollers 30a, 30b, 30c, and 30d may be made of, for example, steel of the same shape or made of resin having high heat resistance, and a heating unit may be provided inside the heat resistant roller. If constituted in this way, for example, the 2nd core of the shape corresponding to a predetermined shape is inserted into the inner surface side, and vulcanization (main vulcanization) is not performed completely. The core is withdrawn with the part left, the hose is set on the hose restraining jig 1, and the remaining heating vulcanization step is performed on the curved part of the hose by the heating means provided on the roller, The molded hose can be completed by cooling the entire hose. According to this method, the second core is removed without proceeding to the end of the vulcanization step (while the flexibility of the rubber layer is still high), so that the second core can be removed more smoothly. As a result, it is possible to produce a molded hose having a tighter bend.

<3>ホース拘束冶具1にセットされたホースを強制冷却する手段を設けることが可能である。このように構成すれば、本加硫を終えた或いは略終えたホースの冷却を迅速に行うことができる。強制冷却する手段の具体的な形態としては、加工装置にセットされたホースの内面に冷却流体(空気などの気体または水などの液体)を流すことの可能な機構で構成することができる。特に、第1ビーム23aの突起24に、冷却用の流体を供給する孔を設けることができる。冷却用の流体として水を用いた場合、第1の突起24からホース42内に供給された冷却水は、ホース42の開放された後端から隣接する第2の突起24から対応するホース42内に供給されるという具合に、全てのホース42に対して直列状に流れ、最初の突起24に戻る循環経路を構成して、その循環経路の途中に冷却水を冷却するための手段を介装すれば良い。他方、冷却用の流体として空気を用いた場合、突起24からホース42内に供給された冷却用空気は、ホース42の開放された後端から大気中に排出されるように構成しても良い。尚、ホースの先端を固定するための突起は、ベース部ではなく揺動アーム(可動部)側に設けることも可能である。或いは、強制冷却する手段の形態としては、加工装置にセットされたホースの外面に冷却流体(空気などの気体または水などの液体)を吹き付ける機構で構成しても良い。 <3> It is possible to provide means for forcibly cooling the hose set in the hose restraining jig 1. If comprised in this way, cooling of the hose which finished the main vulcanization or was almost completed can be performed rapidly. As a specific form of the forced cooling means, a mechanism capable of flowing a cooling fluid (a gas such as air or a liquid such as water) through the inner surface of a hose set in the processing apparatus can be used. In particular, a hole for supplying a cooling fluid can be provided in the protrusion 24 of the first beam 23a. When water is used as the cooling fluid, the cooling water supplied from the first protrusion 24 into the hose 42 is supplied from the second protrusion 24 adjacent to the rear end of the hose 42 into the corresponding hose 42. A circulation path that flows in series with respect to all the hoses 42 and returns to the first protrusion 24 is formed, and means for cooling the cooling water is provided in the middle of the circulation path. Just do it. On the other hand, when air is used as the cooling fluid, the cooling air supplied from the protrusion 24 into the hose 42 may be discharged into the atmosphere from the open rear end of the hose 42. . Note that the protrusion for fixing the tip of the hose can be provided not on the base portion but on the swing arm (movable portion) side. Or you may comprise as a form of the means to forcibly cool by the mechanism which sprays cooling fluid (gas, such as air, or liquid, such as water) on the outer surface of the hose set to the processing apparatus.

<4>或いは、図13に示す形態のホース拘束冶具1Aを用いても良い。このホース拘束冶具1Aは、フロア等に載置可能な平面視で矩形のベース部52と、ベース部52に対して着脱可能な一本の丸棒部材53(可動部の一例)とを有する。ベース部52は、水平から僅かに傾斜して配置された矩形板状の第1ベース板61と、第1ベース板61の最もレベルの低い一辺から、第1ベース板61よりも強い勾配で傾斜して配置された矩形板状の第2ベース板62と、第1ベース板61の最もレベルの高い一辺から若干離間した位置で垂直に延びた係止板63とを備える。ベース部52の左右の端部には、丸棒部材53の両端を係止可能な一対の係止部材52aが配置されている。 <4> Or you may use 1A of hose restraint jigs of the form shown in FIG. The hose restraining jig 1A includes a rectangular base portion 52 that can be placed on a floor or the like in a plan view, and a single round bar member 53 (an example of a movable portion) that can be attached to and detached from the base portion 52. The base portion 52 is inclined with a stronger gradient than the first base plate 61 from the rectangular base plate-shaped first base plate 61 disposed slightly inclined from the horizontal and one side having the lowest level of the first base plate 61. A rectangular base plate-like second base plate 62 and a locking plate 63 extending vertically at a position slightly spaced from the highest level side of the first base plate 61. A pair of locking members 52 a that can lock both ends of the round bar member 53 are disposed at the left and right ends of the base portion 52.

第1ベース板61と係止板63との間には、ホース43の先端をほぼ垂直に挿入して係止可能な縦孔63aが形成されている。また、第1ベース板61の上面には、矩形板状の第1ブロック64と第3ブロック66が、ベース部52の長手方向に沿って多数並設されている。第1ブロック64どうしの間と、第3ブロック66どうしの間とには、ホース43の直線状部分を案内する溝が形成されている。第1ブロック64が形成する案内溝と第3ブロック66が形成する案内溝とは、「く」の字状を形成するように互いに曲折しており、各第1ブロック64と第3ブロック66の間には、円柱状の第2ブロック65が配置されている。第2ベース板62の上面には、第3ブロック66と同類の第4ブロック67がベース部52の長手方向に沿って多数並設されている。   Between the first base plate 61 and the locking plate 63, a vertical hole 63a that can be locked by inserting the tip of the hose 43 substantially vertically is formed. In addition, a large number of rectangular plate-like first blocks 64 and third blocks 66 are arranged in parallel along the longitudinal direction of the base portion 52 on the upper surface of the first base plate 61. A groove for guiding the linear portion of the hose 43 is formed between the first blocks 64 and between the third blocks 66. The guide groove formed by the first block 64 and the guide groove formed by the third block 66 are bent so as to form a “<” shape, and the first block 64 and the third block 66 A cylindrical second block 65 is disposed between them. On the upper surface of the second base plate 62, a large number of fourth blocks 67 similar to the third blocks 66 are arranged in parallel along the longitudinal direction of the base portion 52.

ホース拘束冶具1Aを用いる場合、加硫缶またはオーブン内での本加硫を終えたホース43から第2中芯を抜き取ると、直ぐに、ホース43の先端を縦孔63aに差し込み、ホース43の先端よりも少し手前側の略直線状の部位を第1ブロック64どうしが形成する溝内に嵌め込み、ホース43の先端に2番目に近い第2湾曲部V2を円柱状の第2ブロック65に当接させ、第2湾曲部に続く略直線状の部分を第3ブロック66どうしが形成する溝内に嵌め込み、ホース43の後端の略直線状の部分を第4ブロック67の側面に当てる。残りのホース43も、加硫缶またはオーブンから出し、第2中芯を抜き取り、同様にホース拘束冶具1Aに設置する。次に、各ホース43の第2湾曲部V3を丸棒部材53で押さえ、丸棒部材53の両端を一対の係止部材52aに順番に差し込む。これで、多数のホース43のホース拘束冶具1Aに対する設置が完了する。第1ベース板61の端部の角が、ホース43の第1湾曲部V1を所定の湾曲状態に保持する当接部の役目を果たしている。円柱状の第2ブロック65はホース43の第2湾曲部V2を所定の湾曲状態に保持する当接部の役目を果たし、水平な姿勢で係止された丸棒部材53はホース43の第3湾曲部V3を所定の湾曲状態に保持する当接部の役目を果たす。このような構成によって、ホース43を3つの湾曲部を含む三次元形状に保持できる。
引き続き、全てのホース43の温度が室温近くになるまで放置する。
全てのホース43が室温近くになるまで放冷されたら、丸棒部材53を係止部材52aから外し、各ホース43を完成した燃料供給用ホース51(成形ホース)として取り出すことができる。
When the hose restraining jig 1A is used, as soon as the second core is removed from the vulcanizing can or the hose 43 that has been completely vulcanized in the oven, the tip of the hose 43 is immediately inserted into the vertical hole 63a, and the tip of the hose 43 A substantially linear portion slightly closer to the front side is fitted into a groove formed by the first blocks 64, and the second curved portion V <b> 2 second closest to the tip of the hose 43 is brought into contact with the cylindrical second block 65. Then, the substantially linear portion following the second curved portion is fitted into the groove formed by the third blocks 66, and the substantially linear portion at the rear end of the hose 43 is applied to the side surface of the fourth block 67. The remaining hose 43 is also taken out from the vulcanization can or oven, the second core is removed, and similarly installed on the hose restraining jig 1A. Next, the second curved portion V3 of each hose 43 is pressed by the round bar member 53, and both ends of the round bar member 53 are sequentially inserted into the pair of locking members 52a. This completes the installation of a large number of hoses 43 on the hose restraining jig 1A. The corner of the end portion of the first base plate 61 serves as a contact portion that holds the first curved portion V1 of the hose 43 in a predetermined curved state. The columnar second block 65 serves as a contact portion that holds the second curved portion V2 of the hose 43 in a predetermined curved state, and the round bar member 53 that is locked in a horizontal posture is the third portion of the hose 43. It plays the role of a contact portion that holds the bending portion V3 in a predetermined bending state. With such a configuration, the hose 43 can be held in a three-dimensional shape including three curved portions.
Subsequently, all the hoses 43 are allowed to stand until they are close to room temperature.
When all the hoses 43 are allowed to cool to near room temperature, the round bar member 53 can be removed from the locking member 52a, and each hose 43 can be taken out as a completed fuel supply hose 51 (molded hose).

<5>さらに、図14に示す形態のホース拘束冶具1Bを用いても良い。このホース拘束冶具1Bは、フロア等に載置可能な矩形板状のベース部材72と、ベース部材72からほぼ垂直に立設された複数の棒状の規制部材73a,73b,73c,73d,73e,73f,73g,73hと、ベース部材72の上面に設けられた幾つかのスペーサ部材74a,74bとからなる。図中で最も左側に位置する、断面が矩形の規制部材73aには、板状の補助部材75が取り付けられている。 <5> Furthermore, you may use the hose restraint jig 1B of the form shown in FIG. The hose restraining jig 1B includes a rectangular plate-like base member 72 that can be placed on a floor or the like, and a plurality of bar-like restriction members 73a, 73b, 73c, 73d, 73e, 73f, 73g, 73h and several spacer members 74a, 74b provided on the upper surface of the base member 72. A plate-like auxiliary member 75 is attached to a regulating member 73a having a rectangular cross section located on the leftmost side in the drawing.

ホース拘束冶具1Bを用いる場合、加硫缶またはオーブン内での本加硫を終えたホース44から第2中芯を抜き取ると、直ぐに、ホース44の先端を補助部材75の垂直面に当て付けつつ、ホース44の残りの部位を、規制部材73bと規制部材73cの間、規制部材73dと規制部材73eの間、規制部材73eと規制部材73fの間、そして、規制部材73gと規制部材73hの間へと、ホース44のジグザグ状の形状に沿って差し込む。これで、最初のホース44のホース拘束冶具1Bに対する設置が完了する。このような構成によって、すなわち、平坦なベース部材72上に平面視で互い違いに配置された複数の棒状の規制部材73と、特定の位置に配置されたスペーサ74との作用で、ホース44を少なくとも3つの湾曲部を含む三次元形状に保持できる。   When using the hose restraining jig 1B, as soon as the second core is removed from the vulcanizing can or the hose 44 that has been completely vulcanized in the oven, the tip of the hose 44 is applied to the vertical surface of the auxiliary member 75 immediately. The remaining portions of the hose 44 are arranged between the regulating member 73b and the regulating member 73c, between the regulating member 73d and the regulating member 73e, between the regulating member 73e and the regulating member 73f, and between the regulating member 73g and the regulating member 73h. The hose 44 is inserted along the zigzag shape. This completes the installation of the first hose 44 to the hose restraining jig 1B. With such a configuration, that is, by the action of the plurality of rod-like regulating members 73 arranged alternately on the flat base member 72 in plan view and the spacers 74 arranged at specific positions, the hose 44 is at least It can be held in a three-dimensional shape including three curved portions.

引き続き、残りのホース44も、加硫缶またはオーブンから出し、第2中芯を抜き取り、先行してホース拘束冶具1Bに設置されたホース44の上に載置する形で同様にホース拘束冶具1Bに設置し、全てのホース42の温度が室温近くになるまで放置する。
全てのホース44が室温近くになるまで放冷されたら、各ホース44を一本ずつ完成した燃料供給用ホース52(成形ホース)としてホース拘束冶具1Bから取り出すことができる。
Subsequently, the remaining hose 44 is also taken out from the vulcanizing can or oven, the second core is removed, and the hose 44 is similarly placed on the hose 44 previously installed on the hose restraining jig 1B. And let it stand until the temperature of all the hoses 42 is close to room temperature.
When all the hoses 44 are allowed to cool to near room temperature, each hose 44 can be taken out from the hose restraining jig 1B as a completed fuel supply hose 52 (molded hose).

本発明の適用対象の一例としての燃料供給用ホースを示す略図Schematic showing a fuel supply hose as an example of an application target of the present invention 本発明によるホースの製造方法の第1工程及び第2工程を示す略図Schematic showing the first and second steps of the hose manufacturing method according to the present invention. 本発明によるホースの製造方法の第3工程を示す略図Schematic showing the third step of the method of manufacturing a hose according to the present invention. 本発明によるホースの製造方法の第4工程を示す略図Schematic showing the fourth step of the method of manufacturing a hose according to the present invention. 本発明によるホースの製造方法の第5工程を示す略図Schematic showing the fifth step of the method of manufacturing a hose according to the present invention. 本発明によるホースの製造装置のローラとホースの関係を示す断面図Sectional drawing which shows the relationship between the roller and hose of the manufacturing apparatus of the hose by this invention 本発明によるホースの製造装置の一実施形態を示す斜視図The perspective view which shows one Embodiment of the manufacturing apparatus of the hose by this invention 図7の装置の一状態を示す破断側面図FIG. 7 is a cutaway side view showing one state of the apparatus of FIG. 図7の装置の別の状態を示す破断側面図FIG. 7 is a cutaway side view showing another state of the apparatus of FIG. 90°曲げの加工試験に供されるホースの湾曲部を示す断面図Sectional drawing which shows the curved part of the hose used for the 90-degree bending test 軸芯の曲率半径Rと成形可能性との関係を示す図表Chart showing the relationship between the radius of curvature R of the shaft core and moldability 軸芯の曲率半径Rとホース湾曲率との関係を示す図表Chart showing the relationship between the radius of curvature R of the shaft core and the hose curvature 本発明によるホースの製造装置の別実施形態を示す斜視図The perspective view which shows another embodiment of the manufacturing apparatus of the hose by this invention. 本発明によるホースの製造装置のさらに別の実施形態を示す斜視図The perspective view which shows another embodiment of the manufacturing apparatus of the hose by this invention.

符号の説明Explanation of symbols

1 ホース拘束冶具(成形ホース製造装置)
2 ベース部
3 揺動アーム(可動部)
11 第1中芯
12 第1押出し機
13 第2押出し機
14 第3押出し機
15 ドラム
16 加硫缶
17 第2中芯
18 オーブン
24 突起
25 溝状案内部
27 ストッパ部材
28 押し付け部材
30 コロ(押さえ部材、当接部)
F 輪郭線(周面、当接部)
41 ホース
42 ホース
50 燃料供給用ホース(成形ホース)
50a 内層ゴム層
50b 中間層
50c 外層
V 湾曲部
1 Hose restraint jig (molded hose manufacturing equipment)
2 Base part 3 Swing arm (movable part)
DESCRIPTION OF SYMBOLS 11 1st core 12 1st extruder 13 2nd extruder 14 3rd extruder 15 Drum 16 Vulcanization can 17 2nd core 18 Oven 24 Protrusion 25 Groove-shaped guide part 27 Stopper member 28 Pressing member 30 Roller (presser) Member, contact part)
F Contour line (surrounding surface, contact part)
41 Hose 42 Hose 50 Fuel supply hose (molded hose)
50a Inner rubber layer 50b Intermediate layer 50c Outer layer V Curved part

Claims (16)

ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法であって、
前記所定形状に対応する形状の中芯を内面側に挿入した状態のホースを加硫のために加熱し、加硫後で放冷前のホースから中芯を抜き取った後、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつホースを冷却する成形ホースの製造方法。
A method for producing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
The hose with the core corresponding to the predetermined shape inserted on the inner surface side is heated for vulcanization, and after extracting the core from the hose after vulcanization and before cooling, external force is applied to the outer surface of the hose. A method for manufacturing a molded hose, wherein the hose is cooled while the outer shape of the hose is held in the predetermined shape by a jig for applying the hose.
ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造する方法であって、
直線状の第1中芯を内面側に挿入した状態のホースを予備加硫のために加熱し、前記第1中芯を抜き取り、次に、前記所定形状に対応する形状の第2中芯を内面側に挿入した状態のホースを加硫のために加熱し、加硫後で放冷前のホースから前記第2中芯を抜き取った後、ホースの外面に外力を加える治具によってホースの外形を前記所定形状に保持しつつホースを冷却する成形ホースの製造方法。
A method for producing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
A hose with a linear first core inserted into the inner surface is heated for preliminary vulcanization, the first core is removed, and then a second core having a shape corresponding to the predetermined shape is removed. The hose inserted on the inner surface side is heated for vulcanization, and after the second core is removed from the hose after vulcanization and before cooling, the outer shape of the hose is applied by a jig that applies external force to the outer surface of the hose. A method for manufacturing a molded hose, in which the hose is cooled while maintaining the predetermined shape.
前記冷却に際して、前記治具はホースの外周の長さの少なくとも三分の一にわたって外力を加える請求項1または2に記載の製造方法。   3. The manufacturing method according to claim 1, wherein, during the cooling, the jig applies an external force over at least one third of the outer circumference of the hose. 前記治具は、ホースを巻き掛け可能な周面を備えた押さえ部材からなり、前記押さえ部材の前記周面は、巻き掛けられたホースの断面をより円形に保つためにホースの両側面を支持する円弧状の断面を備える請求項3に記載の製造方法。   The jig is composed of a pressing member having a peripheral surface around which the hose can be wound, and the peripheral surface of the pressing member supports both side surfaces of the hose in order to keep the section of the wound hose more circular. The manufacturing method according to claim 3, further comprising an arcuate cross section. ホースが少なくとも2層のゴム層を有し、前記樹脂層は前記ゴム層の間に配置された熱可塑性フッ素樹脂層からなる請求項1から4のいずれか一項に記載の製造方法。   The manufacturing method according to any one of claims 1 to 4, wherein the hose has at least two rubber layers, and the resin layer includes a thermoplastic fluororesin layer disposed between the rubber layers. 前記所定形状に含まれる湾曲部をホースの軸芯に沿った切断面に関して、ホース外周面が形成する最も小さな円弧の半径を、ホースの前記軸芯が形成する円弧の半径によって除した商をホース湾曲率と定義した時、前記ホース湾曲率が0.62以上に設定されている請求項1から5のいずれか一項に記載の製造方法。   The hose is a quotient obtained by dividing the radius of the smallest arc formed by the outer peripheral surface of the hose by the radius of the arc formed by the shaft core of the hose with respect to the cut surface along the shaft core of the hose. The manufacturing method according to any one of claims 1 to 5, wherein when the curvature is defined, the hose curvature is set to 0.62 or more. ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造するための製造装置であって、
前記所定形状に対応する形状の中芯を内面側に挿入した状態のホースを加硫のために加熱し、次に、加硫後で放冷前のホースから中芯を抜き取った後に用いられ、ホースの外形を前記所定形状に保持するためにホースの外面に外力を加える当接部を有し、前記当接部によって外形を前記所定形状に保持したままホースを室温まで冷却可能に構成された製造装置。
A manufacturing apparatus for manufacturing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
The hose in a state where the core corresponding to the predetermined shape is inserted on the inner surface side is heated for vulcanization, and then used after removing the core from the hose after vulcanization and before cooling, In order to hold the outer shape of the hose in the predetermined shape, the outer surface of the hose has a contact portion that applies an external force, and the hose can be cooled to room temperature while holding the outer shape in the predetermined shape by the contact portion. Manufacturing equipment.
ゴム層と前記ゴム層に積層された樹脂層とを有し、且つ、所定形状に曲げ加工された成形ホースを製造するための製造装置であって、
直線状の第1中芯を内面側に挿入した状態のホースを予備加硫のために加熱し、前記第1中芯を抜き取り、次に、前記所定形状に対応する形状の第2中芯を内面側に挿入した状態のホースを加硫のために加熱し、さらに、加硫後で放冷前のホースから前記第2中芯を抜き取った後に用いられ、ホースの外形を前記所定形状に保持するためにホースの外面に外力を加える当接部を有し、前記当接部によって外形を前記所定形状に保持したままホースを室温まで冷却可能に構成された製造装置。
A manufacturing apparatus for manufacturing a molded hose having a rubber layer and a resin layer laminated on the rubber layer, and being bent into a predetermined shape,
A hose with a linear first core inserted into the inner surface is heated for preliminary vulcanization, the first core is removed, and then a second core having a shape corresponding to the predetermined shape is removed. The hose inserted on the inner surface side is heated for vulcanization, and is used after the second core is removed from the hose after vulcanization and before cooling, to maintain the hose in the predetermined shape. In order to achieve this, the manufacturing apparatus has a contact portion that applies an external force to the outer surface of the hose, and the hose can be cooled to room temperature while maintaining the outer shape in the predetermined shape by the contact portion.
前記治具はホースの外周の長さの少なくとも三分の一にわたって外力を加えるように構成されている請求項7または8に記載の製造装置。   The manufacturing apparatus according to claim 7 or 8, wherein the jig is configured to apply an external force over at least one third of the outer circumference of the hose. 前記当接部が、ホースを巻き掛け可能な押さえ部材の周面からなり、前記押さえ部材の前記周面は、巻き掛けられたホースの断面をより円形に保つためにホースの両側面を支持する円弧状の断面を備える請求項9に記載の製造装置。   The abutting portion is composed of a circumferential surface of a pressing member around which the hose can be wound, and the circumferential surface of the pressing member supports both side surfaces of the hose in order to keep the cross section of the wound hose more circular. The manufacturing apparatus of Claim 9 provided with an arc-shaped cross section. フロアに載置可能なベース部と、前記ベース部に対して第1軸芯周りで揺動可能に支持された可動部とを有し、前記ベース部と前記可動部の一方に少なくとも2つの押さえ部材が設けられており、前記ベース部と前記可動部の他方に前記少なくとも2つの押さえ部材の間にホースの一部を押し込み可能な少なくとも1つの押さえ部材が設けられている請求項7から10のいずれか一項に記載の製造装置。   A base portion that can be placed on the floor; and a movable portion that is swingably supported around the first axis with respect to the base portion, and at least two pressers on one of the base portion and the movable portion 11. The member according to claim 7, wherein a member is provided, and at least one pressing member capable of pressing a part of the hose between the at least two pressing members is provided on the other of the base portion and the movable portion. The manufacturing apparatus as described in any one. 前記押さえ部材の軸芯が前記第1軸芯に対して傾斜して設けられている請求項11に記載の製造装置。   The manufacturing apparatus according to claim 11, wherein an axis of the pressing member is provided to be inclined with respect to the first axis. 前記押さえ部材がその回転位置を調節可能に、且つ、前記第1軸芯と平行な向きに沿って位置調節可能に構成されている請求項11または12に記載の製造装置。   The manufacturing apparatus according to claim 11 or 12, wherein the pressing member is configured to be capable of adjusting a rotational position thereof and to be capable of adjusting a position along a direction parallel to the first axis. 前記押さえ部材に加熱手段が設けられている請求項10から13のいずれか一項に記載の製造装置。   The manufacturing apparatus according to claim 10, wherein the pressing member is provided with a heating unit. 前記所定形状に保持されたホースを強制冷却する手段が設けられている請求項7から14のいずれか一項に記載の製造装置。   The manufacturing apparatus according to any one of claims 7 to 14, wherein means for forcibly cooling the hose held in the predetermined shape is provided. 前記ベース部と前記可動部の前記一方か前記他方に、ホースの内面に嵌り込むことでホースの一端を固定するための突起が設けられており、前記突起にホースを内面側から強制冷却するための流体を供給する孔が設けられている請求項15に記載の製造装置。   A protrusion for fixing one end of the hose by being fitted to the inner surface of the hose is provided on the one or the other of the base portion and the movable portion, and the hose is forcibly cooled from the inner surface side to the protrusion. The manufacturing apparatus according to claim 15, wherein holes for supplying the fluid are provided.
JP2004311147A 2004-10-26 2004-10-26 Method and apparatus for manufacturing molded hose Pending JP2006123206A (en)

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Publication number Priority date Publication date Assignee Title
JP2009172908A (en) * 2008-01-25 2009-08-06 Bridgestone Corp Vulcanizing and retaining tool
CN105058763A (en) * 2015-08-04 2015-11-18 福州诺贝尔福基机电有限公司 Resin-pipe forming device and technology
KR20180046571A (en) * 2016-10-28 2018-05-09 주식회사 아성프라텍 door glass guide plastic deformation protector of automobile

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JP2000289121A (en) * 1999-04-08 2000-10-17 Marugo Rubber Ind Co Ltd Manufacture of bent hose with rubber-resin lamination layer
JP2003531038A (en) * 1999-02-26 2003-10-21 デイコ プロダクツ,エルエルシー Method for manufacturing curved thermoplastic tubing

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JPH11192668A (en) * 1997-12-28 1999-07-21 Bridgestone Corp Manufacture of composite bending hose
JP2003531038A (en) * 1999-02-26 2003-10-21 デイコ プロダクツ,エルエルシー Method for manufacturing curved thermoplastic tubing
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JP2009172908A (en) * 2008-01-25 2009-08-06 Bridgestone Corp Vulcanizing and retaining tool
CN105058763A (en) * 2015-08-04 2015-11-18 福州诺贝尔福基机电有限公司 Resin-pipe forming device and technology
KR20180046571A (en) * 2016-10-28 2018-05-09 주식회사 아성프라텍 door glass guide plastic deformation protector of automobile
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