JP5637363B2 - Reinforcement hose - Google Patents

Description

  The present invention relates to a reinforcing hose that is used as a pressure-resistant hose, an antistatic hose, or the like, and has, for example, a wire rod such as a ground wire or a reinforcing fiber and a reinforcing protrusion spirally wound around the outside.

Conventionally, as this type of reinforcement hose, a resin hose body, a resin reinforcement wire wound spirally around the outer periphery of the hose body, and integrated with the outer periphery of the hose body, and the reinforcement wire are crossed. An earth wire provided on the outer peripheral surface of the hose body, and the earth wire is embedded in the reinforcement wire at a position where the metal wire or the earth wire and the reinforcement wire overlap with each other. Some of them are left exposed on the outer peripheral surface (see, for example, Patent Document 1).
As the manufacturing method, before welding the reinforcing wire to the outer peripheral surface of the hose body and integrating it, the ground wire is wound around the outer peripheral surface of the hose body in advance, and the hot-melted reinforcement is applied from above the ground wire. By winding and contacting the wire, the wire is welded to the outer peripheral surface of the hose body, and the ground wire is fixed in a state of being embedded in the weld surface of the reinforcing wire.

Japanese Patent No. 2935993

However, in such a conventional reinforcing hose, a ground groove is formed across the reinforcing wire by embedding the ground wire in the welding surface of the reinforcing wire, so that the ground wire is along the longitudinal direction of the hose body, In other words, if it is placed parallel to the axis of the hose body or wound in a spiral at an angle slightly inclined from the line parallel to the axis of the hose body, the crossing angle between the ground wire and the reinforcing wire will increase, resulting in a concave The total length of the groove is substantially the same as the width dimension of the reinforcing wire, specifically, the same as or slightly longer than the width dimension.
In such a reinforcing hose where the overall length of the ditch is almost equal to the width of the reinforcing wire, an external force acting to bend the hose acts to partially dent the reinforcing wire in the inner part, When an external force such as crushing from both sides or one side of the direction is applied and the reinforcing wire at the crushing part is partially recessed, the bending stress concentrates on the groove that is almost the same as the width of the reinforcing wire. Therefore, there is a problem that the reinforcing wire is easily deformed in the direction of expanding the groove, cracks are generated from the groove, and it is difficult to maintain the original performance of the hose.

  An object of the present invention is to cope with such a problem, and it is an object to prevent cracking of a reinforcing protrusion due to an external force, further prevent cracking of a reinforcing protrusion due to an external force, and the like. Is.

The present invention in order to achieve the above object, the hose body, and the wire disposed along the outside surface of the hose body, along the outer peripheral surface of the hose body so as to overlap the outside of the wire A reinforcing ridge formed so as to be thermally welded to the outer peripheral surface of the hose body by winding the molten resin in a spiral shape, and the wire rod and the reinforcing ridge are wound in a reverse spiral shape. arranged so as to intersect, the overlapping portion between the reinforcing ribs and the wire, as well as the shape formed along the extending direction of the reinforcing ribs, elastically deformable made of soft material to the inner surface of said reinforcing ribs A soft layer is formed by laminating, and a groove that can be elastically deformed is formed on the surface of the soft layer so that the wire is embedded across the soft layer .

The present invention having the features described above is arranged so that the crossing angle between the wire rod and the reinforcing protrusion is small, and the overlapping portion of the wire rod and the reinforcing protrusion is formed long along the extending direction of the reinforcing protrusion. If the groove is formed so that the wire rod is embedded in the welding surface of the reinforcing protrusion, the reinforcing protrusion is partially recessed due to external force such as bending or crushing the hose. However, since these external forces are dispersed with respect to the concave grooves and the reinforcing protrusions are difficult to deform in the direction of expanding the concave grooves, the reinforcing protrusions can be prevented from cracking due to the external force.
As a result, the hose's original performance can be maintained over a long period of time compared to the conventional one in which the crossing angle between the wire and the reinforcing wire is large and the overall length of the groove is almost equal to the width of the reinforcing wire. Economical.

Further, when a soft layer that is elastically deformable is laminated on the inner surface of the reinforcing protrusion, and a concave groove is formed on the surface of the soft layer so that the wire is embedded across the soft layer, Even if the reinforcing protrusion 3 is partially recessed due to an external force such as crushing, the concave groove 3b of the soft layer 3c is elastically deformed, and cracks starting from the concave groove 3b are unlikely to occur. It is possible to further prevent the reinforcing protrusion from being cracked by an external force.
As a result, the original performance of the hose can be maintained over a longer period.

In addition, when the wire is embedded in the outer peripheral surface of the hose body and a welding surface that contacts the wire is formed on the inner surface of the reinforcing protrusion, the hose is reinforced with an external force such as bending or crushing the hose. Even if the protrusions are partially recessed, cracks are not generated on the welded surface, so that cracking of the reinforcing protrusions due to external force can be further prevented.
As a result, the original performance of the hose can be maintained over a longer period.

It is explanatory drawing which shows the reinforcement hose which concerns on embodiment of this invention, (a) is a partially notched perspective view, (b) is the front view which expanded the principal part partially, (c) is (b) ( It is a vertical side view along a 1C)-(1C) line. It is explanatory drawing which shows the reinforcement hose which concerns on other embodiment of this invention, (a) is a partially cutaway perspective view, (b) is the front view which expanded the principal part partially, (c) is (b). It is a vertical side view along the (2C)-(2C) line | wire. It is the partially expanded vertical side view which shows the reinforcement hose which concerns on other embodiment of this invention. It is the partially expanded vertical side view which shows the reinforcement hose which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 4, the reinforcing hose H according to the embodiment of the present invention includes a hose body 1, a wire 2 arranged along the outer circumferential surface 1 a of the hose body 1, and the outer circumferential surface of the hose body 1. A reinforcing protrusion 3 formed so as to be thermally welded to at least the outer peripheral surface 1a of the hose body 1 by winding the molten resin in a spiral shape so as to overlap the outside of the wire 2 along 1a. As prepared.

As an example of the manufacturing method, the hose body 1 is formed by using a soft synthetic resin such as a thermoplastic resin as a material, heat-melting it with an extruder, extruding it into a tube, and cooling and curing it.
When the reinforcing hose H according to the embodiment of the present invention is a laminated reinforcing hose in which a plurality of layers are stacked, the hose body 1 is an inner layer.

The wire 2 is, for example, a metal wire such as a copper wire, an earth wire made of conductive fiber, a reinforcing fiber made of synthetic resin, a reinforcing thread, or the like. As shown in FIGS. 1 to 3, the outer peripheral surface 1 a of the hose body 1. It is also possible to dispose it in a predetermined direction or to embed it in the predetermined direction inside the outer peripheral surface 1a of the hose body 1 as shown in FIG.
Further, as the material of the wire 2, itself or at least the outer peripheral portion is formed of a resin that melts with heat generated when the reinforcing ridge 3 described later is wound, and this molten resin is sometimes melted when the reinforcing ridge 3 is wound. It is also possible to prevent the formation of a groove 3b, which will be described later, between the reinforcing protrusion 3 and the wire 2.

As for the arrangement direction of the wire 2, it is preferable that the wire 2 is wound spirally (spiral) along the outer peripheral surface 1 a of the hose body 1 as shown in FIGS. 1 and 2.
Although not shown in the drawings as another example, the hose body 1 can be arranged in parallel with the axis X.

As shown in FIGS. 1 to 3, as an example of a method of arranging the wire 2 on the outer peripheral surface 1 a of the hose body 1, the hose body 1 of a molten body extruded into a tube by an extruder is completely After being hardened, the wire 2 is wound so as not to bite into the outer peripheral surface 1a.
Moreover, as shown in FIG. 4, as an example of a method of embedding the wire 2 inside the outer peripheral surface 1a of the hose body 1, a hose body 1 of a molten body extruded into a tubular shape by an extruder is completely used. Before curing, the wire 2 is wound around, for example, so as to bite into the outer peripheral surface 1a, and embedded as necessary so that a part of the wire 2 is exposed.

  The reinforcing protrusion 3 extrudes a hard synthetic resin that has been thermally melted by an extrusion molding machine, and is wound spirally around the outer peripheral surface 1a of the hose body 1 so as to intersect the wire 2 so that the inner surface of the molten resin is The weld rib 3a is thermally welded to the outer peripheral surface 1a of the hose body 1, and the molten resin is cooled and hardened, whereby the reinforcing protrusion 3 is formed in a predetermined cross-sectional shape.

As shown in FIGS. 1 to 2, when the wire 2 is arranged on the outer peripheral surface 1 a of the hose body 1, the wire 2 is embedded across the welding surface 3 a of the reinforcing protrusion 3 across the wire 2. A groove 3b is formed in the groove.
Furthermore, as shown in FIG. 3, an elastically deformable soft layer 3c made of a soft material such as a soft synthetic resin is extruded inside the reinforcing protrusion 3 at the same time in a state where both are laminated by coextrusion molding. The surface of the soft layer 3c may be a welding surface 3a that is thermally welded to the outer peripheral surface 1a of the hose body 1, and the groove 3b may be formed so that the wire 2 is embedded across the surface.
In addition, as shown in FIG. 4, when the wire 2 is embedded inside the outer peripheral surface 1 a of the hose body 1, the welding surface 3 a of the reinforcing protrusion 3 is connected to the exposed portion of the wire 2 as necessary. Contact to bring it into close contact.

Then, the wire 2 is wound in a spiral in the opposite direction at substantially the same angle as the spiral wrapping angle of the reinforcing protrusion 3, so that the crossing angle θ between the wire 2 and the reinforcing protrusion 3 is reduced, and the wire It is preferable that the overlapping portion S of the reinforcing ridges 3 and the reinforcing ridges 3 is formed long along the extending direction of the reinforced ridges 3, that is, the winding direction.
As a specific example, as shown in FIGS. 1 (b) and 2 (b), the crossing angle θ between the wire 2 and the reinforcing protrusion 3 is set to about 50 degrees or less, and the total length L of the overlapping portion S is set. It is desirable to make it about 1.3 times or more the width dimension W of the reinforcing protrusion 3.

According to such a reinforcing hose H, as shown in FIGS. 1 (a) to (c) and FIGS. 2 (a) to (c), a groove for embedding the wire 2 in the welding surface 3a of the reinforcing protrusion 3 is provided. In the case where 3b is formed, for example, as described in FIG. 1 of Japanese Patent No. 2935993, compared to the one wound spirally at an angle slightly inclined from the line parallel to the axis of the hose body, The total length L of the overlapping portion S that becomes the total length of the concave groove 3 b becomes longer along the reinforcing protrusion 3.
For this reason, an external force acting to bend the hose acts to partially dent the reinforcing protrusion 3 at the inner part thereof, or an external force acting from both the radial direction side or one side of the hose acts to crush the hose. Even if the reinforcing ridges 3 in the part are partially recessed, their external forces are dispersed with respect to the long groove 3b having the full length L, and the reinforcing ridge 3 is deformed in the direction of expanding the groove 3b. It becomes difficult.
Thereby, the crack of the reinforcement protrusion 3 by external force can be prevented.
In particular, when the total length L of the overlapping portion S (concave groove 3b) / the width dimension W of the reinforcing protrusion 3 is 1.3 or more, even if an external force that partially dents the reinforcing protrusion 3 is applied, The crack of the reinforcing protrusion 3 can be reliably prevented.

In addition, as described above, the wire rod 2 is not arranged so that the crossing angle θ with the reinforcing protrusion 3 is small, but instead, as will be described later, as shown in FIG. A soft layer 3c that can be elastically deformed is laminated inside, and a groove 3b is formed on the surface of the soft layer 3c so that the wire 2 is embedded across the surface, as shown in FIG. It is also possible to embed the wire 2 inside the outer peripheral surface 1 a of the hose body 1 and to form the welding surface 3 a in contact with the exposed portion of the wire 2 on the inner surface of the reinforcing protrusion 3.
Next, each embodiment of the present invention will be described with reference to the drawings.

  The reinforcing hose H according to the first embodiment is a laminated reinforcing hose in which a plurality of layers are laminated as shown in FIGS. 1A to 1C, and the wire 2 along the outer peripheral surface 1 a of the inner layer as the hose body 1. After that, the molten resin is spirally wound so as to overlap the outside of the wire 2 to form a hard reinforcing protrusion 3, and then the outer layer 4 is laminated so as to cover the wire 2 and the reinforcing protrusion 3. Integrated.

In the example shown in FIG. 1, the spiral winding direction of the wire 2 and the spiral winding direction of the reinforcing protrusion 3 are reversed.
Although not shown as another example, for example, as described in FIG. 1 of Japanese Patent No. 2935993, the spiral winding direction of the wire 2 and the spiral winding direction of the reinforcing protrusion 3 can be the same direction. It is.

Furthermore, in the example shown in FIG. 1, the surface of the outer layer 4 is formed smoothly.
In addition, as another example, it is possible to form a desired shape such as a cross-sectional waveform along the outer shape of the reinforcing protrusion 3.

  According to the reinforcing hose H according to the first embodiment of the present invention, since the outer layer 4 is integrally laminated so as to cover the wire 2 and the reinforcing protrusion 3, the exposed portion of the wire 2 is disconnected or positioned. It is possible to prevent displacement and breakage of the reinforcing protrusion 3, and also improve pressure resistance, which is effective when used as a pressure hose.

In particular, as shown in FIG. 1, when the spiral winding direction of the wire 2 and the spiral winding direction of the reinforcing protrusion 3 are reversed, the wire 2 tends to expand and change in the radial direction, and the reinforcing protrusion The disadvantage that the strips 3 are twisted or easily stretched in the axial direction is canceled out and compensates for each other, and it becomes difficult to change in expansion in the radial direction, and at the same time, it becomes difficult to twist or stretch in the axial direction.
Thereby, both improvement in pressure resistance and prevention of twisting can be achieved, and there is an advantage that a well-balanced reinforcing hose H having excellent shape retaining performance can be provided.

  In Example 2, as shown in FIGS. 2A to 2C, the reinforcing hose H does not provide the outer layer 4, and the outer peripheral surface 1 a of the hose body 1 is a wire 2 such as a metal wire such as a copper wire or a conductive material. The configuration of the antistatic hose in which the grounding wire is exposed to the outer peripheral surface 1a of the hose body 1 between the reinforcing protrusions 3 by winding the grounding wire made of fiber is shown in FIG. Unlike the above, the other configuration is the same as that of the first embodiment shown in FIG.

In the example shown in FIGS. 2 (a) to (c), the extrusion amount of the molten resin to be the reinforcing protrusion 3 is increased and made thicker than in Example 1 shown in FIGS. 1 (a) to (c). Thus, when the antistatic hose is routed while being in contact with the ground or the like during use, the exposed portion of the grounding wire serving as the wire 2 is prevented from coming into contact with the ground or the like.
Although not shown as another example, it is possible to make the thickness of the reinforcing protrusion 3 substantially the same as the thickness of the reinforcing protrusion 3 shown in FIGS.

  According to the reinforcing hose H according to the second embodiment of the present invention, the reinforcing protrusion 3 is thickened by an external force by making the reinforcing protrusion 3 thicker than the hose described in FIG. 1 of Japanese Patent No. 2935993. There is an advantage that it is possible to provide an antistatic hose that is difficult to break and further achieves both improvement in pressure resistance and prevention of twisting.

  In this Example 3, as shown in FIG. 3, an elastically deformable soft layer 3c made of a soft material such as a soft synthetic resin is formed on the inner side of the reinforcing protrusion 3 at the same time in a state where both layers are laminated by coextrusion molding. FIG. 1 shows a configuration in which the surface of the soft layer 3c is extruded to be a welding surface 3a that is heat-welded to the outer peripheral surface 1a of the hose body 1, and a groove 3b is formed so that the wire 2 is embedded across the surface. Unlike the embodiment 1 shown in FIG. 2 or the embodiment 2 shown in FIG. 2, the other configuration is the same as the embodiment 1 shown in FIG. 1 or the embodiment 2 shown in FIG.

In the example shown in FIG. 3, the wire rod 2 is arranged in parallel with the axis X of the hose body 1, or different from the spiral winding angle of the reinforcing protrusion 3, although not shown unlike the first and second embodiments. It is also possible to wind spirally at an angle.
Further, in the example shown in FIG. 3, the outer layer 4 is provided in the same manner as in the first embodiment. However, as in the second embodiment, an antistatic hose having no outer layer 4 may be used.

  According to the reinforcing hose H according to the third embodiment of the present invention, unlike the first and second embodiments, the reinforcing protrusion 3 is prevented from cracking due to an external force regardless of the winding direction of the wire 2. There is an advantage that you can.

  In the fourth embodiment, as shown in FIG. 4, the wire 2 is embedded inside the outer peripheral surface 1 a of the hose body 1, and the outer peripheral surface 1 a of the hose body 1 and the exposed portion of the wire 2 are formed on the inner surface of the reinforcing protrusion 3. The configuration in which the welding surface 3a to be contacted is formed is different from the first embodiment shown in FIG. 1 or the second embodiment shown in FIG. 2, and other configurations are shown in the first or second embodiment shown in FIG. This is the same as Example 2.

In the example shown in FIG. 4, although not shown, unlike the first and second embodiments, the wire 2 is arranged in parallel with the axis X of the hose body 1, or is arbitrarily different from the spiral winding angle of the reinforcing protrusion 3. It is also possible to wind spirally at an angle.
Further, in the example shown in FIG. 4, the outer layer 4 is provided in the same manner as in the first embodiment. However, as in the second embodiment, an antistatic hose having no outer layer 4 may be used.

  According to the reinforcing hose H according to the fourth embodiment of the present invention, unlike the first and second embodiments, the reinforcing protrusion 3 is prevented from cracking due to an external force regardless of the winding direction of the wire 2. There is an advantage that you can.

In the first embodiment, the hose body 1 is a laminated reinforcing hose in which the inner layer and the outer layer 4 are laminated and integrated. In the second embodiment, the antistatic hose is not provided with the outer layer 4. Although shown, it is not limited to this, and although not shown in Examples 1-4, one or more innermost layers made of a transparent material adapted to the fluid passing through the inside of the hose are provided inside the inner layer that becomes the hose body 1. Although not shown in the first, third, and fourth embodiments, one or more outermost layers may be provided outside the outer layer 4.
In this case, the same effects as those of the first to fourth embodiments can be obtained.

DESCRIPTION OF SYMBOLS 1 Hose body 1a Outer peripheral surface 2 Wire material 3 Reinforcement protrusion 3a Welding surface 3b Groove 3c Soft layer S Overlapping part θ Crossing angle

Claims (1)

And the hose body, and the wire disposed along the outside surface of the hose body, the molten resin as along the outer peripheral surface of the hose body overlaps on the outside of the wire by winding spirally, the hose body wherein with the outer peripheral surface and a reinforcing rib which is formed to be thermally welded, the,
Arranged so as to cross by winding the reinforcing ribs and the wire in the opposite direction of the spiral, the overlapping portion between the reinforcing ribs and the wire, to form formed along the extending direction of the reinforcing ribs In addition, an elastically deformable soft layer made of a soft material is laminated on the inner surface of the reinforcing protrusion, and an elastically deformable groove is formed on the surface of the soft layer so that the wire is embedded across the soft layer. reinforced hose, characterized in that it was.

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