JP2007051758A - Flexible laminated hose and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible laminated hose formed by integrally laminating layers formed of materials which are hard to bond due to poor compatibility. <P>SOLUTION: Uneven parts 3 engaged with each other are formed on the outer peripheral surface 1a of an inner layer 1 and the inner peripheral surface 2a of an outer layer 2 formed of the materials hard to bond, and the inner layer 1 and the outer layer 2 are integrated by the engagement of the uneven parts 3. The inner layer 1 and the outer layer 2 are thereby prevented from positional deviation even if they are formed of the materials of poor compatibility and inferior adhesive property. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention mainly relates to a flexible laminated hose that is fixedly connected by connecting both ends of the hose and a method for manufacturing the same.
Specifically, the present invention relates to a flexible laminated hose in which an inner layer and an outer layer formed of different materials are laminated in the radial direction.

  Conventionally, as this type of flexible laminated hose, by connecting fittings to both ends of a hose body formed of steel-containing vinyl chloride, a hot and cold water circulation fitting attached to an indoor bathtub, and an outdoor In some cases, hot water is forcibly circulated between the bathtub and the hot water supply device by piping connection to a hot water supply device installed in the water supply (see, for example, Patent Document 1).

JP 11-336955 A (second page)

However, such a conventional flexible laminated hose has a certain degree of strength against pulling and bending, but the normal heat resistance temperature with respect to the temperature of the hot water flowing inside is limited to about 65 ° C. There is a concern that the end of the hose body may come off from the hose side fittings connected to the hot water circulation connector or hot water supply device when flowing hot water of higher temperature than this. .
Moreover, in order to boil the bath in a short time, it is effective to boil by increasing the heating power of the hot water supply device. However, in the conventional flexible laminated hose as described above, the temperature of the hot water passing through the interior is set to 65 ° C. Due to the hose performance, it has been impossible to efficiently boil the bath by setting the hot water temperature to 65 ° C. or higher using a hot water heater with strong thermal power.
Therefore, an inner layer made of a material having high heat resistance such as cross-linked polyethylene is disposed on the inner surface of the hose body that comes into contact with hot water, and the outer layer is excellent in flexibility such as soft vinyl chloride. By laminating and integrating the outer layers made of different materials, even if hot water up to about 90 ° C is flowed, the hose ends will not come off from the connection fittings due to thermal deformation, and it is efficient. It is possible to make the bath boil well.
However, in this case, the cross-linked polyethylene of the inner layer and the soft vinyl chloride of the outer layer are incompatible with each other and are difficult to bond, so the inner layer and the outer layer can be bonded and integrated. For this reason, there is a problem in that there is a risk that the interlayer may be misaligned and hinder the piping work.

An object of the present invention is to provide a flexible laminated hose in which layers made of materials that have poor compatibility and are difficult to adhere are integrally laminated.
In addition to the object of the invention described in claim 1, the invention described in claim 2 aims to reliably prevent misalignment in the axial direction between layers while having a simple structure.
In addition to the object of the invention described in claim 1, the invention described in claim 3 aims to reliably prevent twisting between layers while having a simple structure.
In addition to the object of the first, second, or third aspect of the invention, the invention of the fourth aspect aims to more reliably prevent misalignment between layers.
In addition to the object of the invention of claim 1, 2, 3 or 4, the invention of claim 5 aims to improve pressure resistance while preventing misalignment between layers due to an increase in internal pressure. It is.
The invention described in claim 6 is intended to simplify the manufacturing process in addition to the object of the invention described in claim 2 or 3.
In addition to the object of the invention described in claim 2 or 3, the invention described in claim 7 aims to reliably form one side of the concavo-convex portion by a simple method.
In addition to the object of the invention described in claim 4, an object of the invention described in claim 8 is to reliably form the concave portion by a simple method using an existing manufacturing apparatus.

In order to achieve the above-described object, the invention according to claim 1 of the present invention includes an outer peripheral surface of the inner layer and an inner peripheral surface of the outer layer formed of a material that is difficult to adhere to the material of the inner layer. The opposing surface is formed with concave and convex portions that engage with each other, and the inner layer and the outer layer are integrated by the engagement of the concave and convex portions.
According to a second aspect of the invention, in the configuration of the first aspect of the invention, the uneven portion is formed on the other side of the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer, and on the other side. And having a configuration in which the concave portions and the convex portions are engaged at least in the axial direction.
According to a third aspect of the present invention, in the configuration of the first aspect of the present invention, as the concavo-convex portion, a concave portion or a convex portion that extends in the radial direction and the axial direction and intersects the outer peripheral surface of the inner layer is formed. In addition, the other is formed on the inner peripheral surface of the outer layer, and a configuration in which the concave portion and the convex portion are engaged in the radial direction and the axial direction is added.
According to a fourth aspect of the present invention, in the configuration of the first, second, or third aspect of the invention, as the uneven portion, a wire is partially disposed on either the outer peripheral surface of the inner layer or the inner peripheral surface of the outer layer. By attaching so that the protrusion protrudes, a concave portion is provided between the protruding wire members, and a convex portion facing the concave portion is formed on the other side.
The invention according to claim 5 is characterized in that a structure in which a reinforcing layer that does not expand and deform along the outer peripheral surface of the outer layer is added to the structure of the invention according to claim 1, 2, 3, or 4. .
When manufacturing the flexible laminated hose according to claim 2 or 3, the invention described in claim 6 is formed by extruding the inner layer, pressing a forming roller on the outer peripheral surface thereof, and forming a recess. The material of the outer layer is extruded and supplied to the downstream side and laminated.
According to a seventh aspect of the present invention, when the flexible laminated hose according to the second or third aspect is manufactured, the inner layer is extruded, and a plurality of convex portions divided in the axial direction are integrally formed on the outer peripheral surface thereof. The outer layer material is extruded and supplied to the downstream side of the material and laminated.
In the invention according to claim 8, when the flexible laminated hose according to claim 4 is manufactured, the inner layer is extruded, and a part of the wire protrudes from the outer peripheral surface of the inner layer on the outer peripheral surface. It is characterized in that a concave portion is formed between the protruding wires, and the outer layer material is extruded and supplied to the downstream side to form a laminated structure.

In the invention according to claim 1 of the present invention, the concave and convex portions that engage with each other are formed on the opposing surfaces of the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer made of a material that is difficult to adhere. By integrating the inner layer and the outer layer by engagement, the inner layer and the outer layer are not misaligned even if they are materials having poor compatibility and poor adhesion.
Accordingly, it is possible to provide a flexible laminated hose in which layers made of materials that have poor compatibility and are difficult to adhere are integrally laminated.
As a result, even if the materials of the inner layer and the outer layer are poorly compatible with each other and are difficult to bond, misalignment between these layers does not occur, making it possible to combine materials that have been difficult until now. You can freely combine materials according to your application and fluid without worrying about
As a result, the normal heat resistance temperature with respect to the temperature of the hot water flowing in the interior can surely perform piping work as compared with the conventional one whose limit is about 65 ° C., and a material having high heat resistance such as cross-linked polyethylene, for example, soft Since a material having excellent flexibility such as vinyl chloride can be integrally laminated, a flexible laminated hose having excellent heat resistance and easy connection work can be provided.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the concavo-convex part is formed on the other side of the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer and on the other side. Consists of convex portions, and by engaging these concave portions and convex portions at least in the axial direction, the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer do not shift in the axial direction.
Therefore, it is possible to reliably prevent the positional deviation in the axial direction between the layers while having a simple structure.

In addition to the effect of the invention of claim 1, the invention of claim 3 forms either a concave portion or a convex portion that extends and intersects in the radial direction and the axial direction on the outer peripheral surface of the inner layer as the uneven portion. By forming the other on the inner peripheral surface of the outer layer and engaging the concave and convex portions in the radial direction and the axial direction, the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer are in the radial direction and the axial direction. Does not shift in the axial direction.
Therefore, it is possible to reliably prevent twisting between layers while having a simple structure.

In addition to the effects of the invention of claim 1, 2 or 3, the invention of claim 4 has a wire rod as a concavo-convex portion on either the outer peripheral surface of the inner layer or the inner peripheral surface of the outer layer. By attaching so as to protrude, a recess is formed between the protruding wires, and a protrusion facing the recess is formed on the other side, so that the outer peripheral surface of the inner layer or the inner periphery of the outer layer is formed. The wire rod integrated with one of the surfaces and the concave portion surrounded by the protruding portion are engaged with the other convex portion, and the outer peripheral surface of the inner layer and the inner peripheral surface of the outer layer are not misaligned. .
Therefore, it is possible to prevent the positional deviation between the layers more reliably.

In addition to the effect of the invention of claim 1, 2, 3 or 4, the invention of claim 5 forms an internal pressure of fluid passing through the inner layer by forming a reinforcing layer that does not expand and deform along the outer peripheral surface of the outer layer. Even if the height rises, the outer layer is not expanded and deformed, and the inner layer and the outer layer are strongly engaged at the uneven portion.
Therefore, the pressure resistance can be improved while preventing the positional deviation between the layers accompanying the increase in internal pressure.

In addition to the effect of the invention of claim 2 or 3, the invention of claim 6 is formed by extruding the inner layer, pressing a forming roller on its outer peripheral surface to form a recess, and forming an outer layer on the downstream side. By extruding and laminating the material, the material of the outer layer flows into the concave portion of the inner layer in a molten or semi-molten state and engages as a convex portion.
Therefore, the manufacturing process can be simplified.
As a result, the manufacturing cost can be reduced.

In addition to the effects of the invention of claim 2 or 3, the invention of claim 7 is formed by extruding the inner layer and integrally projecting a plurality of convex parts divided in the axial direction on the outer peripheral surface thereof, By extruding and laminating the material of the outer layer on the downstream side, the material of the outer layer flows into the convex portion of the inner layer in a molten or semi-molten state and engages as a concave portion.
Therefore, one side of the concavo-convex portion can be reliably formed by a simple method.
As a result, the manufacturing cost can be reduced.

In the invention of claim 8, in addition to the effect of the invention of claim 4, the inner layer is extruded, and the wire is attached to the outer peripheral surface so that a part thereof protrudes from the outer peripheral surface of the inner layer. A recess is formed between the protruding wires, and the material of the outer layer is extruded and supplied to the downstream side, and the material of the outer layer is melted or semi-molten in the recess of the inner layer. It flows in as it is and becomes a convex part to engage.
Therefore, the concave portion can be reliably formed by a simple method using an existing manufacturing apparatus.
As a result, the manufacturing cost can be reduced.

  The flexible laminated hose A of the present invention comprises an inner layer 1 formed into a tubular shape with a predetermined material as shown in FIGS. 1 to 5 and a material that is difficult to adhere to the material of the inner layer 1 on the radially outer side. The outer layer 2 formed into a tubular shape is laminated, and an uneven portion 3 that engages with each other is formed on the opposing surface of the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2, The inner layer 1 and the outer layer 2 are integrated by the engagement of the part 3.

  The inner layer 1 and the outer layer 2 are formed into a tubular shape by extruding a material heated and melted from an extruder (not shown) in a molten state into a cylindrical shape. The one side and the other side are formed over the entire circumferential direction, or are formed only partially in the circumferential direction.

  The concavo-convex portion 3 includes a concave portion 3a formed on one of the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2, and a convex portion 3b formed on the other. The protrusion 3b is engaged at least in the axial direction of the inner and outer layers 1 and 2.

As an example of the concavo-convex forming means for forming the concavo-convex portion 3, as shown in FIGS. 1 and 2, there is a forming roller R that presses against the outer peripheral surface 1 a of the inner layer 1 or the inner peripheral surface 2 a of the outer layer 2. It is done.
The forming roller R is rotatably disposed so as to face the outer peripheral surface 1a of the inner layer 1 or the inner peripheral surface 2a of the outer layer 2 that is extruded from the above-described extrusion molding machine. This is a molding die R1 for forming 3a or the convex portion 3b.

  As a specific method for forming the concavo-convex portion 3, the inner layer 1 extruded as described above is filled with a fluid such as air, or the inner layer 1 is increased by other methods. While holding 1 in a cylindrical shape, either one of the concave portion 3a or the convex portion 3b having a predetermined shape is entirely in the circumferential direction by pressing the forming roller R before the outer peripheral surface 1a is completely cured. It is formed only in a part in the circumferential direction, and in the subsequent process, the material of the outer layer 2 is melted in one of the concave portion 3a or the convex portion 3b by extruding the material of the outer layer 2 from the extruder in a molten state. It flows in the semi-molten state, and the other of the concave portion 3a or the convex portion 3b is formed on the inner peripheral surface 2a.

  As an example of the shape of the concavo-convex portion 3, at least one of the annular concave portion 3a or the convex portion 3b extending in the radial direction is arranged on the outer peripheral surface 1a of the inner layer 1 at appropriate intervals in the axial direction. By forming the other on the inner peripheral surface 2a of the outer layer 2 and engaging these concave portions 3a and convex portions 3b in the axial direction, the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2 Does not shift in the axial direction.

  Furthermore, as other shape examples, as shown in the figure, either one of the concave portion 3a or the convex portion 3b that extends in the radial direction and the axial direction and intersects the outer peripheral surface 1a of the inner layer 1 is formed, and the other is the outer side. The inner peripheral surface 2a of the inner layer 1 and the outer peripheral surface 2a of the outer layer 2 are formed on the inner peripheral surface 2a of the layer 2 by engaging the concave portions 3a and the convex portions 3b in the radial direction and the axial direction. It is also possible to prevent misalignment between the radial direction and the axial direction.

  In the illustrated example, the direction of the concave portion 3a and the convex portion 3b is arranged in a linear shape or a lattice shape parallel to the radial direction or the axial direction, but is not limited thereto, and is inclined with respect to the radial direction or the axial direction. It is also possible to arrange them so as to intersect at an appropriate angle other than a right angle, or to make a shape (pattern) using a curve other than a straight line or a lattice.

  In addition, as another example of the unevenness forming means, as shown in FIG. 4, on the outer peripheral surface 1a of the inner layer 1 or the inner peripheral surface 2a of the outer layer 2, protruding ridges 3c extending in the axial direction are arranged at appropriate intervals in the circumferential direction. Or a plurality of protrusions 3c extending in the axial direction are integrally protruded in the circumferential direction, and a rotary cutter (not shown) or the like arranged downstream thereof is used. By forming notches while melting a part of the ridges 3c, one side of the concavo-convex part 3 is formed in the whole circumferential direction or a part in the circumferential direction, such as forming a plurality of convex parts 3b 'divided in the axial direction. To do.

As a specific method for forming the concavo-convex portion 3, at the time of extrusion molding of the inner layer 1, after forming a plurality of convex portions 3 b ′ divided in the axial direction on the outer peripheral surface 1 a, By extruding the material 2 in the molten or semi-molten state, the material of the outer layer 2 flows into the convex portion 3b 'in the molten or semi-molten state, and the concave portion 3a' is formed on the inner peripheral surface 2a. Both of them are engaged so that the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2 are not displaced in the radial direction and the axial direction, respectively.
In addition, the shape of the said protruding item | line 3c and convex part 3b 'may be other than the example of illustration.

Then, on the outer peripheral surface 2 a of the outer layer 2, a reinforcing layer 4 made of a reinforcing wire 4 a that does not expand and deform along the outer peripheral surface 2 a is formed as necessary, and the outer layer 5 is covered with the outermost layer 5. Therefore, it is preferable to improve the pressure resistance by strongly engaging the inner layer 1 and the outer layer 2 with the concavo-convex portion 3 while preventing the outer layer 2 from expanding and deforming.
As the reinforcing wire 4a, for example, a synthetic resin reinforcing yarn such as polyester, nylon, or aramid, a reinforcing fiber or a monofilament (monofilament), or a metal reinforcing wire such as stainless steel is used. It is configured by winding in a spiral shape or a net shape along the outer peripheral surface 2a.

  In addition, a tubular innermost layer 6 made of, for example, cross-linked polyethylene having excellent heat resistance can be disposed inside the inner layer 1.

Further, as another example of the unevenness forming means, as shown in FIG. 5, along the outer peripheral surface 1a of the inner layer 1 or the inner peripheral surface 2a of the outer layer 2, for example, a synthetic resin such as polyester, nylon, or aramid is used. A wrapping machine (not shown) for winding a wire 7 made of a reinforcing wire, a reinforcing fiber, a monofilament (monofilament), or a metal reinforcing wire such as stainless steel can be used.
The winding machine is arranged to face the outer peripheral surface 1a of the inner layer 1 or the inner peripheral surface 2a of the outer layer 2 extruded from the above-described extruder, and a part of the wire 7 is formed on the inner layer 1. It is attached by being wound so as to protrude from the outer peripheral surface 1a or the inner peripheral surface 2a of the outer layer 2, and a concave portion 3a ″ is provided between the protruding wire members 7.

As a specific method for forming the recess 3a ″, the wire 7 is wound before the outer peripheral surface 1a of the inner layer 1 extruded as described above is completely cured, and the inner end of the wire 7 is used as the inner layer 1. A method in which at least an outer end portion of the inner layer 1 protrudes from the outer peripheral surface 1a of the inner layer 1 by being cured while being embedded in the outer peripheral surface 1a of the inner layer 1, and a wire rod on the outer peripheral surface 1a of the inner layer 1 There is a method in which at least the outer end portion protrudes from the outer peripheral surface 1a of the inner layer 1 by strongly winding 7 and causing the inner end portion of the wire 7 to bite into the outer peripheral surface 1a of the inner layer 1. .
Therefore, it is preferable to use the wire 7 having a large wire diameter.
Embodiments of the present invention will be described below with reference to the drawings.

In Example 1, as shown in FIGS. 1 and 2, the flexible laminated hose A of the present invention is a reheating hose, and is formed into a tubular shape using a cross-linked polyethylene or a low-density polyethylene having excellent heat resistance. The outer peripheral surface of the inner layer 1 before the surface of the layer 1 and the outer layer 2 formed into a tubular shape with soft vinyl chloride or the like that is not compatible with the crosslinked polyethylene or low density polyethylene and is difficult to adhere. It is integrally laminated through the uneven portion 3 formed on 1a.
Further, a reinforcing layer 4 made of a reinforcing wire 4a that does not expand and deform along the outer peripheral surface 2a of the outer layer 2 is formed, and a tubular body made of soft vinyl chloride or the like is laminated as the outermost layer 5 on the outer side of the reinforcing layer 4. As a result, pressure resistance is improved.

  The reheating hose is installed in a hot water circulation connecting device (not shown) attached to an indoor bathtub (not shown), as disclosed in, for example, JP-A-11-336955, and outdoors. It is a hose excellent in heat resistance in which a hot water supply device (not shown) is connected by piping and hot water is forcedly circulated between the bathtub and the hot water supply device.

  Further, in the case of the illustrated example, as the concave and convex portion 3, the pair of upper and lower forming rollers R are pressed against the outer peripheral surface 1 a of the inner layer 1 that is fed at a constant speed in the horizontal direction, whereby the radial direction and axis The recesses 3a extending in the direction intersecting with each other are recessed in a lattice shape over the entire circumferential direction, and in the subsequent process, the material of the outer layer 2 is poured into the lattice-shaped recesses 3a in a molten state or a semi-molten state, On the inner peripheral surface 2a of the outer layer 2, a lattice-like convex portion 3b that fits with the lattice-like concave portion 3a is projected.

  Further, as the reinforcing layer 4, for example, a synthetic resin fiber such as polyester fiber or nylon fiber, a metal fiber such as stainless fiber, or a fiber formed of other materials is used as the outer peripheral surface of the outer layer 2. It is comprised by winding in mesh shape along 2a.

  In the illustrated example, as the reinforcing wire 4a, for example, a plurality of polyester fibers of 1000 to 1500 denier are spirally wound at equal intervals to form a mesh, but the present invention is not limited to this. Other arrangements, such as arranging the reinforcing yarn along the outer peripheral surface 2a of the outer layer 2, or winding a metal steel wire, a hard resin wire, or a monofilament spirally, may be used.

Next, the effect of the flexible laminated hose A will be described.
Since the opposing surfaces of the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2 are integrated via the concavo-convex portions 3 that engage with each other, the inner layer 1 and the outer layer 2 have poor compatibility. Even if the tube bodies are made of materials having poor adhesiveness, no positional deviation occurs between them.
Further, since the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2 are engaged in the radial direction and the axial direction in the axial direction and are not displaced in both directions, respectively, Even if a force acts, no twist is generated between the intermediate layer 2 and the adhesive layer 4.

As a result, the inner layer 1 and the outer layer 2 made of materials that are poorly compatible and difficult to adhere can be integrally laminated, and as a result, from the inner layer 1 to the outermost layer 5 across the outer layer 2 and the reinforcing layer 4. A flexible laminated hose A that is integrally laminated as a whole can be provided.
In particular, when both ends of the hose A are connected and fixed piping is performed, the hose A is not bent and deformed except during connection work, so that there is no possibility that a big problem will occur in use.

  In Example 2, as shown in FIG. 3, a tubular innermost layer 6 made of crosslinked polyethylene having excellent heat resistance is disposed inside the inner layer 1, and the innermost layer 6 is compatible with the crosslinked polyethylene. The inner layer 1 made of polyethylene, which is good and easy to bond, is coextruded to form a double layer, and the outer layer 2 made of soft vinyl chloride which is not compatible with the polyethylene and is difficult to bond to the outside of the inner layer 1 Is different from the first embodiment shown in FIGS. 1 and 2, and the other configuration is the same as the first embodiment shown in FIGS. 1 and 2. .

  Therefore, in Example 2 shown in FIG. 3, the innermost layer 6 and the inner layer 1 are co-extruded and double-molded, and therefore, from the innermost layer 6 to the outermost layer 5 with the inner layer 1, the outer layer 2 and the reinforcing layer 4 interposed therebetween. It is possible to provide a flexible laminated hose A in which all are integrated, and the amount of crosslinked polyethylene which is higher in price than the first embodiment shown in FIGS. 1 and 2 can be reduced, thereby reducing the manufacturing cost. There is an advantage that can be achieved.

  In the third embodiment, as shown in FIG. 4, a plurality of convex portions 3b 'divided in the axial direction are integrally projected on the outer peripheral surface 1a of the inner layer 1 at appropriate intervals in the circumferential direction. In the subsequent process, the material of the outer layer 2 is extruded and laminated in the molten or semi-molten state on the outer side of the convex portion 3b ', and the concave portion 3a' is formed in the inner peripheral surface 2a, thereby forming the inner side. The configuration in which the outer peripheral surface 1a of the layer 1 and the inner peripheral surface 2a of the outer layer 2 are not displaced in the radial direction and the axial direction, respectively, is different from the first embodiment shown in FIGS. The configuration other than that is the same as that of the first embodiment shown in FIGS.

  In the case of the illustrated example, the innermost layer 6 made of crosslinked polyethylene, low density polyethylene or the like having excellent heat resistance is disposed inside the inner layer 1, and these innermost layer 6 and the crosslinked polyethylene, low density polyethylene, etc. For example, the inner layer 1 made of an olefinic thermoplastic elastomer such as Santoprene (registered trademark) or a styrene thermoplastic elastomer such as Dynalon (registered trademark) is coextruded to form a double layer. On the outside of the layer 1, an outer layer 2 made of soft vinyl chloride, which has poor compatibility with the olefin elastomer and styrene elastomer and is difficult to adhere, is laminated via an uneven portion 3.

  Therefore, the third embodiment shown in FIG. 4 can obtain the same effects as those of the first and second embodiments described above, and in addition, the convex portion 3b ′ on one side of the concave and convex portion 3 can be formed by a simple method. Since it can be formed reliably, there is an advantage that the manufacturing cost can be reduced.

  In Example 4, as shown in FIG. 5, the flexible laminated hose A of the present invention is a silicone reinforced hose used in food, beverages, medical equipment, chemistry and other industries, and the main component is silicone rubber or The inner layer 1 formed into a tubular shape with a silicone resin or the like, and the outer layer 2 formed into a tubular shape with soft vinyl chloride or the like that has poor compatibility with the silicone rubber or the silicone resin and are difficult to bond. The configuration shown in FIG. 1 and FIG. 2 is a structure in which the wire 7 is integrally laminated via the concavo-convex portion 3 formed by attaching the wire 7 so that a part of the wire 7 protrudes along the outer peripheral surface 1a. 1. Unlike the embodiment 2 shown in FIG. 3 and the embodiment 3 shown in FIG. 4, the other configurations are the same as those of the embodiment 1 shown in FIGS.

  The wire 7 is reinforced with synthetic resin reinforcing yarns such as polyester, nylon and aramid, reinforcing fibers and monofilaments (monofilament) along the outer peripheral surface 1a of the inner layer 1 immediately after being extruded from the above-described extruder. The wire 7 made of fiber) or the like is wound so that the outer portion protrudes from the outer peripheral surface 1a of the inner layer 1, so that the inner portion of the wire 7 is embedded, and the inner layer 1 remains in a partially embedded state. By hardening the outer peripheral surface 1 a, a recess 3 a ″ is provided between the protruding outer portions of the wire 7.

In the case of the illustrated example, a plurality of wires 7 are spirally wound to form a lattice pattern, and a quadrangular or diamond-shaped portion surrounded by these wires 7 is defined as a recess 3a ″.
As other examples, although not shown, for example, as disclosed in Japanese Patent Application Laid-Open No. 2004-197774, a plurality of wires 7 are knit knitted into a cylindrical shape, or one wire 7 is axially connected to the hose. A coil wound spirally at a predetermined pitch may be used. However, the inner portion of these wires 7 is hardened while being embedded in the outer peripheral surface 1a of the inner layer 1, and a recess 3a ″ is formed between the protruding outer portions. There is no change in recessing.

  In a step after the recess 3a ″ is formed by such a wire 7, the material of the outer layer 2 is poured into the recess 3a ″ in a molten state or a semi-molten state, and the inner peripheral surface 2a of the outer layer 2 is poured. A convex portion 3b ″ that fits into the concave portion 3a ″ protrudes from the concave portion 3a ″, and the concave portion 3a ″ and the convex portion 3b ″ engage with each other so that the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface of the outer layer 2 are engaged. 2a is not displaced in the axial direction and the radial direction.

  In addition to the illustrated example, a reinforcing layer 4 made of a reinforcing wire 4 a that does not expand and deform along the outer peripheral surface 2 a of the outer layer 2 is formed in the same manner as in the first embodiment described above, and the outermost layer is formed outside the reinforcing layer 4. It is also possible to improve pressure resistance by laminating tube bodies made of soft vinyl chloride or the like as 5.

Accordingly, the fourth embodiment shown in FIG. 5 achieves the same effects as those of the first embodiment described above, and in addition, is surrounded by the wire 7 integrated with the outer peripheral surface 1a of the inner layer 1 and the protruding portion thereof. Since the concave portion 3a ″ engages with the convex portion 3b ″ formed on the inner peripheral surface 2a of the outer layer 2, the positional deviation between the outer peripheral surface 1a of the inner layer 1 and the inner peripheral surface 2a of the outer layer 2 is increased. There is an advantage that can be prevented more reliably.
Further, the manufacturing method does not require the molding roller R used in Example 1 shown in FIGS. 1 and 2 or the cutter used in Example 3 shown in FIG. 4, and existing equipment such as an extrusion molding machine and a winding machine are not required. Since it can be carried out using only the production apparatus and the method for carrying out it is simple, there is an advantage that the production cost can be reduced.

In the previous embodiment, the flexible laminated hose A of the present invention is a reheating hose or a silicone reinforced hose. However, the present invention is not limited to this. Even if it exists, the effect similar to the effect mentioned above is acquired.
Further, in the first to fourth embodiments, first, one side of the concavo-convex portion 3 is formed on the outer peripheral surface 1a of the inner layer 1, and then the other side is formed on the outer peripheral surface 2a of the outer layer 2, but this is limited to this. Instead, the other side may be formed on the outer peripheral surface 1 a of the inner layer 1 after one side of the concavo-convex portion 3 is formed on the outer peripheral surface 2 a of the outer layer 2.
The material of the inner layer 1 and the outer layer 2 is not limited to the above-mentioned polyethylene, olefin elastomer, styrene elastomer, silicone rubber, or silicone resin, and vinyl chloride or vinyl chloride resin, and has poor compatibility and adheres. Other materials may be used as long as they are difficult to do.
Furthermore, in the first to third embodiments, the reinforcing layer 4 made of the reinforcing wire 4a that does not expand and deform along the outer peripheral surface 2a of the outer layer 2 is formed. However, the present invention is not limited to this, and the reinforcing layer 4 is not provided. In addition, as long as the inner layer 1 and the outer layer 2 are stacked via the concavo-convex portion 3, a plurality of layers may be stacked inside and outside the illustrated example.

It is a partially notched perspective view which shows Example 1 of the flexible laminated hose of this invention. It is a vertical side view along the (2)-(2) line of FIG. It is a partially cutaway perspective view showing Example 2 of the flexible laminated hose of the present invention. It is a partially notched perspective view which shows Example 3 of the flexible laminated hose of this invention. It is a partially notched perspective view which shows Example 4 of the flexible laminated hose of this invention.

Explanation of symbols

A Flexible laminated hose R Molding roller R1 Mold 1 Inner layer 1a Outer peripheral surface 2 Outer layer 2a Inner peripheral surface 3 Concavity and convexity 3a, 3a ′, 3a ″ Concavity 3b, 3b ′, 3b ″ Convex 3c Convex 4 Reinforcement Layer 4a Reinforcing wire 5 Outermost layer 6 Innermost layer 7 Wire

Claims (8)

In a flexible laminated hose in which an inner layer (1) and an outer layer (2) formed of different materials are laminated in the radial direction,
The opposing surfaces of the outer peripheral surface (1a) of the inner layer (1) and the inner peripheral surface (2a) of the outer layer (2) formed of a material difficult to adhere to the material of the inner layer (1), A flexible laminated hose characterized in that an uneven portion (3) to be engaged is formed, and an inner layer (1) and an outer layer (2) are integrated by the engagement of the uneven portion (3). The concavo-convex portion (3) is formed on the concave portion (3a) formed on one of the outer peripheral surface (1a) of the inner layer (1) and the inner peripheral surface (2a) of the outer layer (2), and on the other. The flexible laminated hose according to claim 1, wherein the concave portion (3 a) and the convex portion (3 b) are engaged at least in the axial direction. As the concavo-convex part (3), one of a concave part (3a) and a convex part (3b) extending in the radial direction and the axial direction and intersecting the outer peripheral surface (1a) of the inner layer (1) is formed, and the other The flexible laminated hose according to claim 1, wherein the concave portion (3 a) and the convex portion (3 b) are engaged in the radial direction and the axial direction by forming an inner surface (2 a) of the outer layer (2). . As the concavo-convex part (3), a part of the wire rod (7) protrudes from either the outer peripheral surface (1a) of the inner layer (1) or the inner peripheral surface (2a) of the outer layer (2). A concave portion (3a ″) is provided between the protruding wire rods (7), and a convex portion (3b ″) facing the concave portion (3a ″) is formed on the other side. The flexible laminated hose according to 1, 2 or 3. The flexible laminated hose according to claim 1, 2, 3, or 4, wherein a reinforcing layer (4) that does not expand and deform is formed along the outer peripheral surface (2a) of the outer layer (2). When manufacturing the flexible laminated hose according to claim 2 or 3, the inner layer (1) is extruded and the molding roller (R) is pressed against the outer peripheral surface (1a) to form the concave portion (3a). A method for producing a flexible laminated hose, characterized in that the material of the outer layer (2) is extruded and supplied to the downstream side and laminated. In manufacturing the flexible laminated hose according to claim 2 or 3, the inner layer (1) is extruded and a plurality of convex portions (3b ') divided in the axial direction on the outer peripheral surface (1a). A method for producing a flexible laminated hose characterized by integrally projecting and laminating the material of the outer layer (2) by extrusion feeding downstream thereof. When manufacturing the flexible laminated hose according to claim 4, the inner layer (1) is extruded, and the outer peripheral surface (1a) is partly surrounded by a wire (7) and the outer periphery of the inner layer (1). It is attached so as to protrude from the surface (1a), a recess (3a ″) is provided between the protruding wires (7), and the material of the outer layer (2) is extruded and supplied downstream thereof. A method for producing a flexible laminated hose characterized by being laminated.

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