JP5497465B2 - Fiber reinforced hose - Google Patents

Description

The present invention relates to a flexible hose in which a hose wall is formed using a synthetic resin material such as a soft synthetic resin, and more particularly to a fiber reinforced hose in which a fiber reinforced layer is embedded inside the hose wall and a method for manufacturing the same.

For some time, flexible hoses have been used to convey air, liquids, refrigerants, etc., and to transmit air pressure, hydraulic pressure, and the like. These flexible hoses often require pressure resistance of the hose, such as mortar hoses, etc., and are flexible as if a reinforcing cord (yarn) or reinforcing cloth is embedded and integrated in the hose wall. Fiber reinforced hoses are widely used.

As a flexible fiber reinforced hose, for example, a hose as disclosed in Patent Document 1 is known. In Patent Document 1, a cross thread (reinforcing thread) is meshed inside a cylindrical hose body. In the pressure-resistant hose in which the reinforcing cord portion is provided on the outer periphery of the hose body and the core material is spirally arranged on the outer periphery of the hose body, the reinforcing cord portion is parallel to the core material in a region where the core material is not located. A pressure-resistant hose comprising a single or a plurality of weft yarns is disclosed (see claim 1). According to the pressure-resistant hose, the thickness of the hose body is maintained as compared with the conventional one while maintaining the pressure-resistant strength of the hose body. It is disclosed that the thickness of the hose can be reduced, the hose can be reduced in weight, the flexibility can be improved, and the manufacturing cost can be reduced.

Further, in Patent Document 2, in a rubber hose having a reinforcing cloth braided with fibers or the like between an inner rubber layer and an outer rubber layer formed by extrusion molding, warp yarns along the hose axial direction of the reinforcing fabric, warp yarns, Disclosed is a rubber hose in which a warp yarn's tensile elastic modulus is smaller than that of a weft yarn, which are substantially orthogonal to each other. According to such a rubber hose, bending without increasing the expansion of the hose due to internal pressure is disclosed. It is disclosed that flexibility can be increased.

JP 2006-145014 A Japanese Patent Laid-Open No. 08-178138

However, in a hose reinforced with cross yarns (reinforcing yarns) that are obliquely oriented with respect to the hose so as to be meshed with each other as disclosed in Patent Document 1, a phenomenon called thread loss occurs. There was a risk of hose strength problems. In other words, it is difficult to completely bond and integrate the material constituting the hose wall and the reinforcing yarn, and the cross yarns oriented in a mesh form are simply overlapped with each other. There was a possibility that the crossed yarn would shift in the direction in which the yarn was distributed in the hose wall. When the reinforcing yarn is displaced, as shown in FIG. 6, the reinforcing yarn R is pulled out from the hose wall particularly at the end of the hose connected to the coupler C or the like, and the reinforcing effect is lost. There is a risk of cracks and tears in the hose wall.

That is, the yarn removal phenomenon is a phenomenon in which when the reinforcing fibers are displaced, the fibers are slackened and tension is not applied to the reinforcing fibers, so that the hose wall cannot be prevented from being stretched. Accordingly, there is a need for a fiber reinforced hose that does not deviate in the direction in which the reinforcing yarn embedded in the hose wall is arranged.

Moreover, when it is going to manufacture the hose disclosed by patent document 2, there exists a problem that an exclusive manufacturing apparatus is needed. In other words, if the hose disclosed in Patent Document 2 is to be manufactured, a dedicated extrusion head is required that extrudes the inner rubber layer and the outer rubber layer and sandwiches a reinforcing cloth in the middle between them. However, such a dedicated extrusion head has poor versatility, and when manufacturing various types of hoses, a dedicated extrusion head is required for each hose, which is a factor that increases the cost of the hose. turn into.

Therefore, it is required to efficiently manufacture a fiber reinforced hose by a more versatile manufacturing method using existing equipment.

An object of the present invention is to provide a fiber-reinforced hose that can be efficiently produced using existing equipment and that has a particularly high reinforcing effect in the axial direction of the hose, and a method for manufacturing the same.

As a result of intensive studies, the inventor constructed a fiber reinforced layer in which both the inner layer and the outer layer of the hose wall were spirally wound with a resin strip and a specific mesh-like reinforcing tape was arranged along the hose axial direction. The inventors have found that the above object can be achieved by configuring the hose wall so that the inner layer resin and the outer layer resin are integrated through the mesh, and the present invention has been completed.

The present invention is a fiber reinforced hose including a hose wall in which a fiber reinforced layer sandwiched between an inner layer, an outer layer, and an inner and outer layer is laminated and integrated, and both the inner layer and the outer layer are spirally made of synthetic resin strips. Is a layer formed in a cylindrical shape by integrating adjacent side edges thereof, and the fiber reinforcing layer is formed of a reinforcing tape including a reinforcing fiber in a net-like shape. A reinforcing layer arranged in a parallel direction and formed in a cylindrical shape, wherein the reinforcing tape is woven with warps and wefts containing reinforcing fibers, and the intersection of warp and wefts is fixed to each other, or reinforcement A fiber reinforced hose, which is a knitted fabric knitted with yarn containing fibers, in which synthetic resins of an inner layer and an outer layer are integrated through a mesh of a reinforcing tape.

In the fiber reinforced hose of the present invention, the reinforcing tape is preferably a reinforcing tape having a knitted structure in which warps and wefts are knitted together. In the fiber reinforced hose of the present invention, it is preferable that a plurality of reinforcing tapes are arranged in parallel over the circumferential direction of the hose (Claim 3). In the fiber reinforced hose of the present invention, it is preferable that a hard reinforcing body formed in a spiral shape by a material harder than the resin material constituting these layers is integrated with the inner layer or the outer layer (claims). 4). In the fiber reinforced hose of the present invention, it is preferable that a second fiber reinforcing layer in which reinforcing yarns including reinforcing fibers are spirally arranged is integrated with the inner layer or the outer layer.

The present invention also includes a first step of spirally winding a synthetic resin strip, integrating the adjacent strip side edges and rotating the hose inner layer, and including a reinforcing fiber in a mesh shape. The configured reinforcing tape is supplied from a tape feeder rotating around the inner layer to be rotated, and arranged on the outer surface of the inner layer in a direction so that the reinforcing tape is substantially parallel to the hose axis. A second step of forming a layer, and a synthetic resin strip is spirally wound around the outer surface of the formed reinforcing fiber layer, and the side edges of the adjacent strips are integrated to rotate the hose outer layer. And a third step of integrating the synthetic resin of the inner layer and the outer layer through the mesh of the reinforcing tape, and the reinforcing tape is woven with the warp yarn and the weft yarn containing the reinforcing fiber, and the intersection of the warp yarn and the weft yarn is fixed to each other Woven fabrics or yarns containing reinforcing fibers A method for producing a fiber reinforced hose which is a knitted fabric knitted Ri (claim 6).

According to the present invention, the reinforcing yarn constituting the mesh-like reinforcing tape is embedded so that the shape of the mesh can be maintained between the inner layer and outer layer resins, and the yarn that is oriented and buried in the hose axial direction is displaced. Even if it tries, the thread | yarn embed | buried in the hose circumferential direction becomes an anchor, a thread | yarn shift | offset | difference is prevented, a thread | yarn omission phenomenon can be prevented beforehand, and the fiber reinforced hose with a high reinforcement effect of a hose axial direction is obtained. Moreover, the fiber reinforced hose of the present invention can be manufactured by applying a manufacturing method called a so-called spiral molding method, and can be efficiently produced using existing production equipment.

Furthermore, when the reinforcing tape is a reinforcing tape having a knitted structure in which warp yarns and weft yarns are knitted together (claim 2), the yarn dropout phenomenon can be prevented more reliably.

Further, when a plurality of reinforcing tapes are arranged in parallel over the circumferential direction of the hose (Claim 3), even when a hose having a different circumferential length is manufactured, the fiber reinforcing layer is constituted by the reinforcing tape having the same width. This makes it possible to share a reinforcing tape, which makes hose production more efficient.

Further, when a hard reinforcing body formed in a spiral shape with a material harder than the resin material constituting these layers is integrated with the inner layer or the outer layer (Claim 4), the inner layer or the outer layer includes a reinforcing fiber. When the second fiber reinforcing layer in which the reinforcing yarns containing the spiral are arranged in a spiral shape is integrated (Claim 5), a large-scale manufacturing facility required by a conventionally known hose structure or manufacturing method thereof These hoses can be manufactured with simple manufacturing equipment.

Moreover, according to the hose manufacturing method of this invention, the fiber reinforced hose excellent in the reinforcement effect of the hose axial direction can be efficiently manufactured using the existing manufacturing equipment.

It is a fragmentary sectional view which shows the structure of the hose of 1st Embodiment of this invention. It is a schematic diagram which shows the manufacturing method of the hose of 1st Embodiment of this invention. It is a schematic diagram which shows the form of the knitting weave of a net-like reinforcement tape. It is a fragmentary sectional view which shows the structure of the hose of 2nd Embodiment of this invention. It is a fragmentary sectional view which shows the structure of the hose of 3rd Embodiment of this invention. It is a schematic diagram which shows the thread | yarn omission phenomenon in the conventional fiber reinforced hose.

Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to the separate embodiment shown below, The form can also be changed and implemented. FIG. 1 is a partial cross-sectional view showing the structure of a flexible fiber reinforced hose 1 according to a first embodiment of the present invention. The fiber reinforced hose 1 is formed by integrating a fiber reinforced layer 4 and an outer layer 3 in a cylindrical shape on the outer periphery of an inner layer 2 formed in a cylindrical shape from a synthetic resin material, thereby forming a hose wall 10. And a flexible hose in which a hard reinforcing body 11 made of a resin material that is relatively harder than the resin material constituting the outer layer 3 is spirally bonded and integrated.

The fiber reinforced hose 1 is manufactured, for example, with an inner diameter of 100 mm, an inner layer thickness of 0.8 mm, an outer layer thickness of 1.0 mm, a hard reinforcing body width of 8 mm, a height of 10 mm, and a hard reinforcing body pitch of 35 mm. These dimensions are appropriately changed depending on the use of the hose and the like, and the inner diameter of the hose is appropriately changed within the range of about 30 to 400 mm and the wall thickness of the hose wall is within the range of about 0.3 to 15 mm.

The fiber reinforced hose 1 of the present invention has flexibility and is preferably used, for example, as a liquid supply hose for pumping liquid material or the like, or as a mortar hose for pumping mortar or the like. Can do.

The structure of the inner layer 2 will be described in detail. The inner layer 2 is formed by spirally integrating a resin strip 21 having a predetermined width made of a synthetic resin (soft vinyl chloride resin in the present embodiment). Yes, the strip 21 is spirally wound and bonded and integrated so that adjacent side edges overlap each other, and is formed into a cylindrical shape. The integration of the side edges of the strip 21 does not necessarily have to be performed by overlapping both side edges, but may be integrated in such a form that both side edges are brought together, but the strength and airtightness of the hose inner layer 2 From the viewpoint of liquid tightness, it is preferable to integrate them in a superposed form.

The fiber reinforcement layer 4 laminated | stacked on the outer side of the inner layer 2 is demonstrated. The fiber reinforcing layer 4 is a reinforcing layer in which one or a plurality of (in this embodiment, 12) net-like reinforcing tapes 41 and 41 are arranged substantially parallel to the hose axial direction. In this embodiment, the reinforcing tapes 41 and 41 are arranged in parallel over the circumferential direction of the hose so that the side edges overlap each other, and the reinforcing layer is formed so as to cover the inner layer 2 in a cylindrical shape. Yes. And in this embodiment, the warp which comprises a reinforcement tape is also substantially parallel to the hose axial direction.

The net-like reinforcing tape 41 will be described in detail below.
In the present invention, the reinforcing tape 41 constituting the fiber reinforcing layer 4 is made by weaving a plurality of yarns and cords containing reinforcing fibers in a net shape to form a strip having a predetermined width. As the reinforcing tape, a knitted fabric (knitted fabric or the like) knitted with one or a plurality of yarns, or a woven fabric woven with warps and wefts can be used.

Here, the net shape is such that the yarns and cords constituting the reinforcing tape 41 are arranged at a relatively sparse interval, and the front and back surfaces of the tape can communicate with each other by a gap between these yarns and cords. Say. In the present invention, the distance between the yarns and cords is larger than the thickness of the yarns and cords so that the resin materials of the inner layer 2 and the outer layer 3 can be directly bonded and integrated through the mesh of the reinforcing tape 41. It is preferable that the interval is larger than the thickness of the fiber reinforcement layer 4.

When the mesh-like reinforcing tape is knitted, the number of yarns constituting the knitted fabric and the knitting method are not particularly limited, but the reinforcing tape is knitted to a predetermined width and used as a reinforcing tape without being cut. Is preferable from the viewpoint of the reinforcing effect of the tape. When the reinforcing tape is a knitted fabric, it is particularly preferable that the yarns are fixed to each other at a portion where the yarns intersect so that the knitted structure of the knitted fabric can be fixed.

When the mesh-like reinforcing tape is a woven fabric made of warp and weft, the reinforcing tape 41 is woven with warp (warp) and weft (weft) oriented along or perpendicular to the direction of the strip. The woven fabric woven in a gauze shape can be exemplified as such. In the reinforcing tape 41, in order to prevent the warp and the weft from shifting, it is preferable that the portions where the warp and the weft intersect (intersection) are fixed to each other by a fixing means such as an adhesive or a knot. The reinforcing tape 41 may be woven directly into a predetermined width, or may be cut into a predetermined width from a wide woven one. In order to enhance the reinforcing effect, it is preferable that the warp yarns are arranged as a continuous yarn substantially parallel to the length direction of the reinforcing tape. As the reinforcing tape 41, a commercially available tape-like material or sheet-like material woven in a net shape can be used.

In the present embodiment, as shown below, the reinforcing tape 41 is a woven fabric woven with warp and weft, and at the same time has a knitting structure in which warp and weft are knitted together. And the intersection of the weft is fixed. That is, as shown in the knitting (weaving) structure in FIG. 3, the warp yarn 411 constituting the net-like reinforcing tape 41 is configured as a knitting yarn in which one or a plurality of reinforcing yarns are knitted in a chain shape. On the other hand, the weft 412 is formed in a twisted shape loosely twisted by two reinforcing yarns. At the intersection of the warp 411 and the weft 412, each reinforcing yarn constituting the weft 412 passes separately through the loop portion of the knitting yarn of the warp 411, and each reinforcing yarn constituting the weft 412 is a warp The reinforcing tape 41 is knitted and woven so as to be knitted into the belt 411.
Use of a reinforcing tape having such a knitted weave structure in the present invention is more preferable from the viewpoint of the hose reinforcing effect because the warp and weft can be more reliably prevented from shifting.

As a fixing means for fixing the intersecting portions of the yarns of the reinforcing tape to each other, in addition to the above-described knitted structure, fixing by impregnation with a binder, bonding of the intersecting portions with an adhesive, and the fibers are thermoplastic fibers Alternatively, it may be a means such as fusion by heating (heat bonding) or knotting of yarns.

The net-like reinforcing tape 41 may vary in material, thickness, and density (interval) among a plurality of types of reinforcing yarns. For example, for warps oriented in a direction substantially parallel to the hose axis, the warp constituent material and thickness are increased so that the reinforcement strength of the warp is increased compared to the weft oriented substantially parallel to the hose circumferential direction. In order to increase the axial strength of the hose, it is preferable to determine the fiber composition and density (interval).

The yarn or cord that includes the reinforcing fiber and becomes the reinforcing yarn may be a yarn in which a plurality of long fibers or short fibers are aggregated, or may be a twisted yarn obtained by combining them. One or a plurality of monofilament fibers may be used. Various fibers can be used as reinforcing fibers, natural fibers such as cotton, hemp, wool and pulp, inorganic fibers such as glass fibers, carbon fibers and metal fibers (stainless fibers, etc.), polypropylene resins, vinyl chloride resins, polyesters. Synthetic resin fibers (for example, polyester fibers, vinylon fibers, nylon fibers, aramid fibers, etc.) made of a synthetic resin such as resin or polyamide resin can be used. These fibers can be used alone or in combination for the reinforcing tape 41. In this embodiment, a reinforcing tape configured to include an aramid fiber as the reinforcing fiber is used.

The yarn or cord including the reinforcing fiber constituting the reinforcing tape 41 may be elastic or stretchable, or may be poor in elasticity or stretchability. From the viewpoint of reinforcing the hose wall, it is preferable that the degree of elasticity and elasticity is less elastic and elasticity than the resin material constituting the hose wall. Further, from the viewpoint of the flexibility of the hose, it is preferable that the yarn and cord including the reinforcing fiber constituting the reinforcing tape 41 have a certain degree of elasticity and stretchability. The above-described warp yarn 411 configured as a knitting yarn knitted in a chain shape is a reinforcing yarn that has an appropriate stretchability and hardly stretches beyond a certain level, and can be particularly preferably used.

Further, the stretchability of the reinforcement tape can be adjusted by the knitting structure or the woven structure of the reinforcement tape. In general, when the reinforcement tape is knitted, the reinforcement tape is more stretchable. The above-described reinforcing tape having a knitted weave structure in which warp and weft are knitted together has an appropriate stretchability and a property that it is difficult to stretch beyond a certain level, and can be particularly preferably used.

The outer layer 3 made of a synthetic resin (soft vinyl chloride resin in the present embodiment) is spirally formed on the outer periphery of the fiber reinforcing layer 4 with a resin strip formed in a predetermined width so that both side edges thereof are overlapped with each other. It is a cylindrical resin layer formed by winding into a shape and bonding and overlapping the overlapping portions. The joining form of the strip side edge portion of the outer layer 3 may be a mating integration, but, like the inner layer 2, from the viewpoint of strength and the like, it is more preferable that the joining form.

The resin material constituting the inner layer 2 and the resin material constituting the outer layer 3 are directly integrated (fused in this embodiment) with each other through the mesh portion of the reinforcing tape 41 of the fiber reinforcement layer 4. With such a configuration, the fiber reinforcing layer 4 is embedded in a state sandwiched between the inner layer 2 and the outer layer 3, and is fixed integrally.

Various resin materials can be used as the synthetic resin material constituting the inner layer 2 and the outer layer 3, for example, soft thermoplastic resins such as soft vinyl chloride resin, vinyl acetate resin, EVA resin and low-density polyethylene resin, and polyolefin-based heat Thermoplastic elastomers such as plastic elastomers and polyurethane thermoplastic elastomers, and rubbers such as natural rubber, acrylonitrile butadiene rubber, silicone rubber, ethylene propylene diene rubber (EPDM), and butadiene rubber (BR) can be used. In particular, a thermoplastic material can be advantageously used in terms of the hose forming speed in the production on the hose forming shaft described later. As the resin material used for the hose wall, it is particularly preferable to use a soft resin material having a hardness of about 50 to 80 degrees (JIS A hardness).

In the present invention, the material of the inner layer 2 and the outer layer 3 is preferably a material having adhesiveness with the reinforcing thread of the mesh-like reinforcing tape 41 of the fiber reinforcing layer 4, but may be a non-adhering material. In addition, it is particularly preferable to select from materials that can be heat-sealed so that the resin materials of the inner layer 2 and the outer layer 3 can be efficiently bonded and integrated with each other through the mesh of the fiber reinforcement layer in the molding step.

The hard reinforcing body 11 is a coil-shaped member made of a resin material that is relatively harder than the resin material constituting the inner layer 2 and the outer layer 3 and is integrally bonded to the outer periphery of the outer layer 3 in a spiral manner. It works to keep the hose in shape.

The resin material forming the hard reinforcing body 11 can be various as long as it can be integrated with the outer layer 3 and is relatively harder than the resin material of the outer layer 3 or the inner layer 2 and can keep the shape retention of the hose well. In this embodiment, a hard vinyl chloride resin is used.

In addition, although the hard reinforcement body 11 can also be embedded and provided in the inside of the outer layer 3 or the inner layer 2, in that case, as a material of the hard reinforcement body 11, metal materials, such as a steel wire, should be used. Alternatively, the resin material of the inner layer 2 or the outer layer 3 may be a non-adhesive material.

The manufacturing method of the fiber reinforced hose of this invention is demonstrated. The fiber reinforced hose 1 described above can be manufactured to an indefinite length by a so-called spiral molding method. FIG. 2 shows a schematic diagram of the manufacturing process. S1 in the figure is a known hose forming shaft, and the tape-like hose material supplied on the hose forming shaft S1 is spirally wound and formed on the hose while rotating to the left in the figure while rotating. Go.

In the first step, a resin material (in this embodiment, a soft vinyl chloride resin) constituting the inner layer 2 is extruded from the extruder E1 into a strip 21 having a predetermined width in a semi-molten state, on the hose forming shaft S1. The strip side edges are overlapped and integrated while spirally wound. The overlapped strip side edges are welded together to form the cylindrical inner layer 2.

In the second step, the reinforcing tapes 41 and 41 are arranged in parallel with the hose axial direction so as to cover the outer periphery of the inner layer 2. Prior to this step, the reinforcing tapes 41 and 41 prepared to a predetermined width are prepared by winding them around the supply bobbins B1 and B1. The supply bobbins B1 and B1 are attached so as to surround the forming shaft S1 on a tape feeder (yarning plate) T1 that is rotatably provided so as to revolve around the hose forming shaft S1. The reinforcing tapes 41 and 41 fed from the supply bobbins B1 and B1 are supplied to the outer peripheral surface of the inner layer 2 formed in the previous step through the slits of the guide G provided in the tape feeder (yarning plate) T1. The At this time, the yarn distribution plate T1 is controlled so as to rotate at substantially the same angular velocity as the hose forming shaft S1, that is, the inner layer 2 rotates. As a result, the reinforcing tape 41 (and the warp yarn) is substantially parallel to the hose axis direction. Be placed.

Reinforcing tapes 41 and 41 fed out from the plurality of supply bobbins B1 and B1 are arranged in parallel to the hose circumferential direction with their side edges overlapped on the outer peripheral surface of the inner layer 2, and are cylindrically reinforced with fibers. Layer 4 is formed.

Subsequently, in the third step, the outer layer 3 is formed so as to cover the outer periphery of the fiber reinforcing layer 4. From the extruder E2, the resin material constituting the outer layer 3 (in this embodiment, a soft vinyl chloride resin) is extruded in a semi-molten state into a strip 31 having a predetermined width, supplied onto the hose forming shaft S1, and spirally formed. While winding, the strip side edges are overlapped and integrated. The overlapped strip side edges are welded together to form a cylindrical outer layer 3. The formed outer layer 3 and inner layer 2 are fused and integrated with each other through a mesh of reinforcing tape 41 constituting the fiber reinforcing layer 4.

In the present embodiment, the hard reinforcing body 11 is formed simultaneously with the formation of the outer layer 3. That is, from the extruder E2, the hard resin material 111 (hard vinyl chloride resin in the present embodiment) that constitutes the hard reinforcing body 11 is co-extruded linearly together with the strip 31 in a semi-molten state, and the hose forming shaft In parallel with the formation of the outer layer 3, the spiral hard reinforcing body 11 is formed. The formation of the hard reinforcing body 11 may be performed separately from the formation of the outer layer 3.

Then, the whole hose is cooled and the fiber reinforced hose 1 is completed, and according to this manufacturing method, such a hose can be manufactured in indefinite length.

In the above manufacturing method, an example is given in which the hose wall material is integrated by heat fusion. However, if an adhesive or the like is used for the integration of the hose wall material, an appropriate adhesive is applied. What is necessary is just to add the process of hardening an adhesive material. Also, if a thermosetting resin material such as a rubber material is used for the hose wall material, it is necessary to integrate the hose wall according to the material used for the hose wall, such as cross-linking the hose wall by heating. What is necessary is just to change a process.

Further, in the case where the reinforcing tape 41 is a tape woven with warps and wefts, and the warp 411 is arranged with an inclination with respect to the tape length direction, in order to enhance the reinforcing effect. The rotational speed of the tape feeder (yarning plate) T1 can be adjusted so that the reinforcing tape 41 is slightly inclined with respect to the hose axis and wound in a loose spiral so that the warp 411 is substantially parallel to the hose axis. preferable.

The effect of the fiber reinforced hose of the present invention will be described.
In the fiber reinforced hose of the present invention, since the reinforcing tape of the fiber reinforced layer 4 is disposed substantially parallel to the hose axial direction, the strength in the length direction of the hose can be effectively increased. And it effectively reinforces the lack of strength (strength in the hose axial direction) of the spiral joint, which tends to be a weak point of the inner layer 2 and the outer layer 3 formed by spiral winding, Strength is sufficiently increased.

Further, in the fiber reinforced hose of the present invention, the reinforcing tape constituting the fiber reinforcing layer 4 is a knitted fabric in which reinforcing yarns are knitted, or woven with warps and wefts so that the intersecting portions of the warp yarns are mutually connected. Further, the fiber reinforced layer 4 is laminated and integrated so that the fiber reinforcing layer 4 is sandwiched between the inner layer 2 and the outer layer 3, and the synthetic resin of the inner layer 2 and the outer layer 3 is integrated through the mesh of the reinforcing tape 41. Therefore, among the reinforcing yarns constituting the reinforcing tape, the yarn 412 oriented and embedded in the hose circumferential direction is embedded in an anchor shape between the inner layer 2 and the outer layer 3, and the reinforcing yarns intersect with each other. The yarn 411 which is fixed at (the entangled portion of the yarn when the reinforcing tape is a knitted fabric) and oriented and embedded in the hose axial direction is prevented from shifting in the yarn arranging direction in the hose wall 10. Therefore, it is possible to prevent the loss of the reinforcing effect due to the so-called thread drop phenomenon.

When the reinforcing tape 41 is a reinforcing tape having a knitted structure in which the warp and the weft are knitted together, fixing of the intersecting portion of the warp 411 and the weft 412 becomes more reliable, and the anchor effect of the weft 412 is achieved. As a result, the above-described yarn drop prevention effect can be further enhanced.

Moreover, the fiber reinforced hose 1 of the present invention can be efficiently manufactured using existing general-purpose manufacturing equipment. That is, as explained in the above description of the production method, the production of the fiber-reinforced hose of the present invention requires a hose forming shaft, a yarn distribution plate (tape feeder), an extruder, and the like. General-purpose equipment used for normal hose production can be used. Moreover, the extrusion head which forms an inner layer and an outer layer can also divert a general purpose thing. Therefore, in the production of the fiber reinforced hose 1 of the present invention, it is not necessary to use a special special extrusion head as in the production of the reinforcing hose disclosed in Patent Document 2.

In the manufacture of the reinforcing hose disclosed in Patent Document 2, every time the inner diameter of the hose, the wall thickness of the hose wall, or the form of lamination is slightly changed, a dedicated extrusion head is required separately, and a wide variety However, in the production of the fiber reinforced hose 1 of the present invention, such waste does not occur, and only a general-purpose hose forming shaft is changed corresponding to the inner diameter. Since most sizes of hoses can be manufactured, fiber-reinforced hoses can be efficiently manufactured using existing manufacturing equipment.

In the fiber reinforced hose 1 of the present invention, the inner layer 2 and the outer layer 3 are formed by spirally winding the strips, so that the hose wall is provided with helical concavo-convex strips alternately. In addition to being relatively easy to configure, as in other embodiments to be described later, if another reinforcing tape is laminated on the resin strip constituting the inner layer and the outer layer, and wound together, The reinforcing layer that reinforces the hose wall in a spiral shape can be formed effectively and simply. Thus, in the fiber reinforced hose 1 of the present invention, the variation of the fiber reinforced hose can be increased without significantly changing the manufacturing equipment, and the fiber reinforced hose can be efficiently manufactured while utilizing the existing equipment. Can do.

And, when a plurality of reinforcing tapes 41 and 41 are arranged in parallel in the hose circumferential direction as in the first embodiment, even when a hose having a different hose diameter (circumferential length) is manufactured, the reinforcing tape By changing the number of 41, a reinforcement tape can be arrange | positioned so that a hose may be covered over the circumferential direction. That is, it is not necessary to prepare different reinforcing tapes for different hose sizes. If one or two types of reinforcing tapes are prepared, all sizes of hoses can be manufactured. From the viewpoint of inventory management of the reinforcing tape 41, the hose can be manufactured efficiently. Accordingly, the width of the reinforcing tape is such that the entire circumference of the hose can be covered with 1 to 30 reinforcing tapes, more preferably 2 to 20 with respect to the circumferential length of the hose to be manufactured (for example, about 30 mm). ) Is preferable.

Furthermore, in the fiber reinforced hose of the present invention, when the spiral hard reinforcing body 11 is integrated with the inner layer 2 and the outer layer 3, the efficiency of the manufacturing method of the present invention over the conventionally known manufacturing method is more remarkable. Become. That is, as in the case of the reinforcing hose disclosed in Patent Document 2, if the inner layer and the outer layer are formed by extruding into a pipe shape, the molded hose is extruded straight without rotating. If a spiral hard reinforcement body is to be provided around the hose, it is necessary to provide a hard reinforcement body rotation device around the hose. In particular, the hard reinforcement body is linearly formed of a semi-molten resin around the hose. If it tries to supply and form, since it will be necessary to rotate the resin extrusion die | dyle around a hose, it will become a very large installation. On the other hand, in the fiber reinforced hose of the present invention, since the hose is formed while rotating on the hose forming shaft, only by supplying a linear material to be the spiral rigid reinforcing body 11 to the hose forming shaft, Since the hard reinforcing body 11 can be formed in a spiral shape, a large-scale facility is not required and a hose can be manufactured efficiently.

The present invention is not limited to the above embodiment, and can be implemented with various modifications. Other embodiments of the present invention will be described below. In the following description, portions different from the above embodiments will be mainly described, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. .

In FIG. 4, the hose structure of the fiber reinforced hose 6 which is 2nd Embodiment of this invention is shown. In this embodiment, the inner coating layer 7 is integrated with the inner layer 2 on the inner side of the hose, the fiber reinforcing layer 4 is formed by winding a single reinforcing tape 41 in a spiral shape, The point which does not have a reinforcement body differs from 1st Embodiment, However, The other point is made the same.

Also in this embodiment, the same effect as 1st Embodiment is exhibited. As shown in the present embodiment, the inner layer and the outer layer in the present invention mean a layer adjacent to the fiber reinforcing layer 4, and do not necessarily mean the innermost layer or the outermost layer of the hose, but further inside the inner layer 2. It is possible to provide an inner coating layer 7 that exhibits a specific function, such as a permeation prevention layer, or to provide a wear-resistant layer having excellent wear resistance on the outer side of the outer layer 3. Further, depending on the degree of demand for preventing the hose from collapsing, the hard reinforcement body can be eliminated as in this embodiment. Moreover, the fiber reinforcement layer 4 can also be comprised with one reinforcement tape like this embodiment.

In FIG. 5, the hose structure of the fiber reinforced hose 9 which is 3rd Embodiment of this invention is shown. In the present embodiment, the inner coating layer 7 is further integrated inside the hose of the inner layer 2, and the second reticulated reinforcing tape 81 is spirally wound between the inner layer 2 and the inner coating layer 7. The point that the reinforcing layer 8 is integrally formed, and the point that the fiber reinforcing layer 4 is configured such that a gap is formed between the reinforcing tapes without overlapping the side edges of the plurality of reinforcing tapes 41, 41. However, although different from the first embodiment, the other points are the same.

Also in this embodiment, the same effect as 1st Embodiment is exhibited. And the hose wall strength of a hose circumferential direction can be effectively raised by providing the fiber reinforcement layer 8 by which the net-like reinforcement tape 81 was wound helically.

In the configuration of the fiber reinforcing layer 4 and the second fiber reinforcing layer 8, the side edges of the mesh reinforcing tape 41 (81) may be overlapped with each other, or may be in a state of being brought into contact with each other, and a gap is generated between them. They may be provided at such intervals. If they are overlapped, a certain amount of reinforcing effect can be given in the direction perpendicular to the length direction of the tape. On the other hand, if the reinforcing tapes 41 and 41 of the fiber reinforcing layer 4 of the third embodiment are provided at intervals such that a gap is generated between them, the reinforcing tape can be saved.

The second fiber reinforcing layer 8 provided in a spiral shape can be provided on the outer layer 4 side. And the material which comprises a 2nd fiber reinforcement layer is not limited to a net-like reinforcement tape, A cloth-like reinforcement tape can be used, and a reinforcement thread and a reinforcement cord are wound spirally, and a reinforcement fiber A second fiber reinforcing layer in which (reinforcing yarns) are spirally arranged can also be configured. When the reinforcing fiber or the reinforcing cord is wound in a spiral shape to form the second fiber reinforcing layer, the hose can be used by burying the reinforcing yarn in a position directly below the hard spiral reinforcing body 11. The strength in the circumferential direction of the hose can be effectively increased without hindering flexibility.

The fiber reinforced hose of the present invention can be suitably used as a pressure-resistant liquid feeding hose. In particular, it can be used as a mortar pressure hose or a high pressure liquid transfer hose, and has high industrial utility value.

DESCRIPTION OF SYMBOLS 1 Fiber reinforcement hose 2 Inner layer 3 Outer layer 4 Fiber reinforcement layer 41 Reinforcement tape 6, 9 Fiber reinforcement hose 7 Inner coating layer 8 Second fiber reinforcement layer 81 Reinforcement tape 10 Hose wall 11 Hard reinforcement body S1 Hose shaping shaft E1, E2 Extruder T1 Tape feeder (Yarn distribution board)
G Guide B1 Bobbin

Claims (6)

A fiber reinforced hose including a hose wall in which a fiber reinforced layer sandwiched between an inner layer, an outer layer, and an inner and outer layer is laminated and integrated,
Both the inner layer and the outer layer are layers formed in a cylindrical shape by winding a strip made of synthetic resin in a spiral shape and integrating the adjacent side edge portions thereof,
The fiber reinforcement layer is a reinforcement layer that is formed in a cylindrical shape in which a reinforcement tape that includes reinforcement fibers and is configured in a net shape is disposed in a direction substantially parallel to the hose axis,
The reinforcing tape is a woven fabric woven with warp yarns and weft yarns containing reinforcing fibers and the intersections of the warp yarns and weft yarns are fixed to each other, or a knitted fabric knitted with yarns containing reinforcing fibers,
A fiber reinforced hose in which the synthetic resin of the inner layer and the outer layer is integrated through the mesh of the reinforcing tape. The fiber reinforced hose according to claim 1, wherein the reinforcing tape is made of a woven fabric having a knitted structure in which warp and weft are knitted together. The fiber reinforced hose according to claim 1, wherein a plurality of reinforcing tapes are arranged in parallel along a circumferential direction of the hose. 2. The fiber reinforced hose according to claim 1, wherein a hard reinforcing body formed in a spiral shape by a material harder than a resin material constituting the layers is integrated with the inner layer or the outer layer. The fiber reinforced hose according to claim 1, wherein a second fiber reinforcing layer in which reinforcing yarns including reinforcing fibers are spirally arranged is integrated with the inner layer or the outer layer. A first step in which a strip made of synthetic resin is spirally wound, and the adjacent strip side edges are integrated to rotate and form a hose inner layer;
Reinforcing tape that includes reinforcing fibers and is configured in a net shape is supplied from a tape feeder that rotates around the inner layer to be rotated, and the outer surface of the inner layer has the reinforcing tape substantially parallel to the hose axis. A second step of arranging in a direction to form a fiber reinforcement layer;
Synthetic resin strips are spirally wound on the outer surface of the formed reinforcing fiber layer, and the adjacent side portions of the strips are integrated to rotate the hose outer layer, and the inner layer through the mesh of the reinforcing tape. Including the third step of integrating the synthetic resin of the outer layer,
A fiber reinforced hose characterized in that the reinforcing tape is a woven fabric woven with warp yarns and weft yarns containing reinforcing fibers and the intersections of the warp yarns and weft yarns are fixed to each other, or a knitted fabric knitted with yarns containing reinforcing fibers. Manufacturing method.

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