JP5277276B2 - Cylindrical jacket and jacket hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical jacket and a jacket hose, in which it is possible to avoid an increase in pressure losses and to increase wear resistance by expanding the inside diameter of a hose for decreased pressure losses when the hose is used in a pressurized state, and by reducing the meandering of the hose during use of the hose. <P>SOLUTION: The cylindrical jacket 1 comprising a woven fabric where a warp and a weft are woven together is characterized in that the diameter of a fiber forming the warp 2 is larger than the diameter of a fiber forming the weft 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cylindrical jacket and a jacket hose such as a fire hose, a shape retention hose, a water absorption hose, and an oil supply hose.

  In general, a fire hose is kept liquid-tight by applying a synthetic resin lining layer to the inner surface of a cylindrical jacket. That is, for example, a jacket in which warp yarns and weft yarns made of fibers are woven into a cylindrical shape by a cylindrical loom is formed, and a lining layer is applied to the inner surface of the jacket.

  Fire hoses are strongly desired to be lightweight and flexible, and tend to reduce the thickness of the lining layer. However, when the lining layer is made thin, irregularities are formed on the inner surface of the lining layer due to the irregularities formed by the weft (intersection) portion of the warp and weft yarns that appear on the inner surface of the jacket, and these irregularities serve as water resistance.

  Therefore, conventionally, a lining layer is provided on the inner surface of a cylindrical jacket, and a plurality of protrusions extending in the length direction of the hose are provided on the inner surface of the lining layer (for example, Patent Document 1). In addition, a lining layer is provided on the inner surface of the cylindrical jacket, and a plurality of grooves extending in the length direction of the hose are provided on the inner surface of the lining layer (for example, Patent Document 2). In both cases, the generation of turbulent flow on the inner surface of the hose is suppressed, the pressure loss is reduced, and the water flow rate is improved.

  However, in conventional fire hoses, etc., the lining layer is around 0.5 mm in order to ensure light weight and flexibility. It cannot be done, and a ridge with a low height must be provided. Even if a groove is provided in the lining layer or a groove is provided in the lining layer of about 0.5 mm, the depth of the groove is slight.

  Therefore, even if a ridge or groove is provided in the lining layer in the axial direction of the hose, the effect of suppressing the generation of turbulent flow cannot be sufficiently exhibited. In addition, if the height of the ridge is increased or the lining layer is thickened to deepen the groove in order to improve the water flow rate, there is a problem that the hose cannot be lightened and flexible. Furthermore, processing the lining layer causes a cost increase.

  In order to improve the above-described problems, the present applicant has previously proposed a jacket hose in which the direction of the oblique line of the oblique weave is substantially the same as the axis of the cylindrical jacket inside the cylindrical jacket. By the way, in such a hose, the thickness of the warp fiber was 1-2 denier, and the thickness of the weft fiber was 4-5 denier.

Japanese Patent Laid-Open No. 7-4569 JP 2000-55247 A

  However, when the warp yarn elongation (cutting elongation) is larger than the weft yarn elongation (cutting elongation) as in the case of conventional hose, when the working pressure is applied to the hose, the hose stretches in the axial direction and causes a pressure loss. There was a problem of increasing. Further, in general, in the case of a hose obtained by weaving thin warp yarn and thick weft yarn, the warp yarn is mainly exposed on the surface of the hose, so that it has a problem that it is weak against damage and has low wear resistance.

  The present invention has been made in consideration of such circumstances. When the hose is used under pressure, the inner diameter of the hose is expanded to reduce pressure loss, and the hose meandering when using the hose is reduced. It is an object of the present invention to provide a cylindrical jacket and a jacket hose that can avoid an increase in pressure loss and can further improve wear resistance.

(1) A cylindrical jacket according to the present invention is a cylindrical jacket made of a woven fabric of warp and weft for producing a jacket hose by providing a lining layer on the inner surface . It is characterized by being thicker than the thickness of the fiber constituting the weft.

  (2) Further, the cylindrical jacket according to the present invention is characterized in that in the cylindrical jacket of plain weave or oblique weave, the thickness of the fiber constituting the warp is made larger than the thickness of the fiber constituting the weft.

  (3) A jacket hose according to the present invention is a jacket hose in which a lining layer is provided on the inner surface of the cylindrical jacket described in the above (1) or (2), and the material of the warp is acrylic fiber.

  (4) Moreover, the jacket hose which concerns on this invention is a jacket hose which provided the lining layer in the inner surface of the cylindrical jacket as described in said (1) or (2), and the material of a weft is a material of nylon fiber and / or warp Is an acrylic fiber.

  (5) Furthermore, the jacket hose according to the present invention is a jacket hose in which a lining layer is provided on the inner surface of a circular woven cylindrical jacket in which a diagonal line in which a warp yarn is continuously floated on a weft yarn is arranged, When the working pressure is applied to the hose, the angle of the oblique line with respect to the direction of the axis of the hose is set to 5 to 15 °.

  (6) In the method of manufacturing a jacket hose according to the present invention, a lining layer is formed on the inner surface of the cylindrical jacket in a state in which the warp is arranged in a spiral shape opposite to the left-right direction of the weft yarn arranged spirally in the cylindrical jacket. It is characterized by forming.

  According to this invention, the weft yarn has a higher cut elongation than the warp yarn, so that when the hose is being used under pressure, the inner diameter of the hose swells and becomes thicker. Pressure loss is reduced as if using a hose. Further, when the hose is used, since the hose is small in elongation, the hose does not meander and pressure loss does not increase. Furthermore, since the fiber thickness of the warp is larger than the fiber thickness of the weft, the wear resistance can be improved as compared with the conventional one.

FIG. 1 is an explanatory view of a cylindrical jacket showing an embodiment of the present invention. 2A is a structural diagram viewed from the outside of the cylindrical jacket of FIG. 1, and FIG. 2B is a structural diagram viewed from the inside of the cylindrical jacket. FIG. 3 is an explanatory view showing a state where a twist is applied to the cylindrical jacket of FIG. 1. FIG. 4A is a structure diagram viewed from the outside in a state where the twist of the cylindrical jacket is applied, and FIG. 4B is a structure diagram viewed from the inside in a state where the twist of the cylindrical jacket is applied. FIG. 5 is a perspective view showing a jacket hose according to the present invention. FIG. 6 is a schematic diagram for explaining the state of the weft thread when no pressure is applied and when the jacket hose is pressurized. FIG. 7 is a schematic view for explaining how to weft the jacket hose. FIG. 8 is a half cross-sectional view of a jacket hose showing another embodiment of the present invention. FIG. 9 is a perspective view of the jacket hose of FIG.

Hereinafter, the present invention will be described in more detail.
In the present invention, the cut elongation (elongation) of the weft yarn is made larger than the cut elongation (elongation) of the warp yarn, or the thickness of the fiber constituting the warp yarn is made larger than the thickness of the fiber constituting the weft yarn. It is characterized by. Specifically, the weft elongation is 20 to 40%, the warp cutting elongation is 10 to 20%, the warp fiber thickness is 3 to 4 dtex, and the weft fiber thickness is 2 It is preferably ~ 3 dtex. Generally, in a hose obtained by weaving warp and weft, such as a fire hose, the warp is exposed on the surface and the weft does not appear on the surface. In consideration of these points, the present invention aims to make warp yarns exposed on the surface thicker than weft yarns and to be resistant to trauma and abrasion.

  In the present invention, the elongation of the weft yarn is larger than the elongation of the warp yarn by giving the weft yarn a larger elongation than the warp yarn. (1) When the hose is used under pressure, the inner diameter of the hose is Since it swells and thickens, the pressure loss decreases as if a thick hose is used. (2) When using a hose, the hose stretches so small that it can meander and increase the pressure loss. Not because. Moreover, it is preferable that the thickness of the fiber constituting the warp is as large as possible. This is because, as can be seen from the fact that the carpet is woven with thick yarn, the thicker one has less wear and is less likely to be damaged.

  In the present invention, examples of the material of the warp include fibers, and examples of the material of the weft include fibers, synthetic resin linear bodies, or combinations thereof.

  Next, based on FIGS. 1-4, the structure of the cylindrical jacket which concerns on this invention is demonstrated. The cylindrical jacket 1 is composed of a plurality of warp yarns 2 made of fibers and one weft yarn 3 made of fibers. The weft thread 3 may be arranged such that two weft threads are arranged in two or three weft threads are arranged in three. For the warp yarn 2, for example, a large number of white yarns of a predetermined thickness made of polyester spun yarn and one pattern yarn 2a made of blue yarn of a predetermined thickness are used. The weft yarn 3 is made of, for example, a polyester filament yarn that is thicker than the warp yarn, and has a predetermined driving number. Of the warp yarns 2 used here, one pattern yarn 2a is in the direction of the oblique line A that the warp yarns 2 and the weft yarns 3 continuously float on the weft yarns 3 when the warp yarns 2 and the weft yarns 3 are obliquely woven. However, this is not directly related to the present invention.

  In the cylindrical jacket 1, for example, a plurality of warp yarns 2 woven using a HM604 type cylindrical loom manufactured by Mandal, Norway, is a shuttle guide pin (not shown) arranged in an annular shape so as to surround the cylindrical jacket 1. Is inserted between each other. One weft yarn 3 woven with the warp yarn 2 is supported by a shuttle (not shown) whose tip is swiveled along the arrangement direction of the shuttle guide pin. Then, a shuttle is passed between the warp yarns 2 that are distributed up and down by a peak portion and a valley portion of a shedding wheel (not shown) so that the weft yarn 3 is spirally woven and the cylindrical jacket 1 is continuously woven. It has become.

  Here, the cylindrical jacket 1 woven by the above-described cylindrical loom is a 1/2 oblique weaving, and FIGS. 1 and 2 are cylindrical jackets 1 made of 1/2 oblique weaving. FIG. 2B shows the inside of the cylindrical jacket, and FIG. 2B shows the inside of the cylindrical jacket, which is composed of warp yarn 2 and weft yarn 3. One of the warp yarns 2 is a handle yarn 2a. When viewed from the outside of the jacket, as shown in FIG. 2A, the warp yarn 2-1 passes through the outside of the single weft yarn 3-1, and then the two weft yarns 3-2 and 3-3. It repeats passing through the inside of the two weft threads 3-5 and 3-6 after appearing on the outside through the inside and then passing the outside of one weft thread 3-4. The adjacent warp yarn 2-2 passes inside the two weft yarns 3-1 and 3-2 and then appears outside the one weft yarn 3-3, and then the two weft yarns 3-4 and 3- After passing through the inside of 5, it repeats appearing on the outside of one weft thread 3-6. Further, the adjacent warp thread 2-3 passes through the outside of one weft thread 3-2 and then appears outside through the inside of the two weft threads 3-3 and 3-4. One weft thread 3-5 After passing through the outside of the yarn, the inside of the two weft threads 3-6 and 3-7 is repeated.

  As described above, the cylindrical jacket 1 woven with 1/2 oblique weaving has the same warp and weft thickness, and the warp yarn 2 is continuous on the weft yarn 3 when the weft density is the same. As shown in FIG. 2B, the direction of the oblique line A that floats on the axis is 45 ° with respect to the axis S of the cylindrical jacket 1, and the handle yarn 2 a is parallel to the axis S of the cylindrical jacket 1.

  Next, the cylindrical jacket 1 woven with 1/2 oblique weaving is twisted about its axis S, and as shown in FIGS. 3 and 4A and 4B, the oblique line A Is substantially coincident with the axis S of the cylindrical jacket 1, all the warps 2 including the patterned yarn 2 a are spiral with respect to the cylindrical jacket 1. Here, the cylindrical jacket 1 woven with 1/2 oblique weaving is twisted about its axis S, and the direction of the oblique line A is given an angle α with respect to the axis S of the cylindrical jacket 1. As a means, for example, twisting is supported by supporting both ends of the cylindrical jacket 1 in the longitudinal direction.

  In the present invention, in the jacket hose in which the lining layer is provided on the inner surface of the oblique woven cylindrical jacket in which the oblique line formed by the warp yarn continuously floating on the weft yarn is provided, when the working pressure is applied to the hose, The angle (α) of the oblique line with respect to the direction of the axis of the hose is set to be 5 to 15 °. By the way, when a plurality of protrusions in the same direction as the axis S (α = 0 °) are arranged on the inner surface of the hose, the pressure loss is reduced by the same effect as the riblet. However, this is a case where the hose is stretched straight, and this is not the case when the hose is curved. The mechanism regarding the local loss (turbulent flow generation) of the curved portion of the hose and the subsequent pressure loss (separation, etc.) in the developed turbulent flow portion is not well understood, but the hose curved portion is helical with respect to the axis S (α = 30). The pressure loss is reduced with the ridges of about ~ 45 °. Since an actual hose has a straight portion and a curved portion, it is preferable to set α = 5 to 15 ° as described above, and more preferably about α = 8 to 12 °.

In the jacket hose, it is preferable that the weft yarn is spirally arranged in a cylindrical jacket, and the left-right direction of the weft yarn is matched with the left-right direction of the oblique line arranged in the same spiral manner in the same spiral direction. Here, if the direction of the oblique line is aligned with the same direction as the lateral direction of the weft weaved in a spiral shape, the angle α is reduced when the working pressure is applied to the hose. The reason for this is that when the weft yarn woven in a spiral is subjected to a working pressure, the coil spring turns back and twists in an increasing direction in an attempt to increase the inner diameter. FIG. 6A shows a state of the jacket hose 21 when no pressure is applied, and FIG. 6B shows a state of the jacket hose 21 when the pressure is applied. From FIG. 6, it is clear that the positions P ₁ , P ₂ , P ₃ , and P ₄ of the weft yarn 22 when no pressure is applied are moved by pressure. In the jacket hose, the “spiral direction” indicates, for example, a direction in which the weft thread 22 is wound (left screw direction) as shown in FIG.

  In the manufacturing method of the cylindrical jacket according to the present invention, the lining layer is formed on the inner surface of the cylindrical jacket in a state where the warp yarns are spirally arranged in the direction opposite to the horizontal direction of the weft yarns arranged spirally in the cylindrical jacket. It is characterized by. As described above, the reason why the hose that is twisted by the working pressure is balanced by a constant twist and cannot be twisted further is that the warp yarn is pulled by the twist of the hose. That is, the force for twisting the hose and the tension of the warp yarn balance and the twisting stops. Therefore, when the lining layer is formed (lining process) in a state where the warp yarn is twisted in the direction opposite to the lateral direction of the weft yarn to be woven in a spiral shape (helical state), when the working pressure is applied, “the hose is about to twist. "The balance between the force to be used and the tension of the warp yarn" means that a hose that is hardly twisted even when the working pressure is applied to the hose is produced.

Next, specific examples and comparative examples of the cylindrical jacket and jacket hose will be described.
Example 1
The cylindrical jacket 1 according to the first embodiment is configured by weaving a warp yarn 2 and a weft yarn 3 thinner than the warp yarn 2. As the warp yarn 2, 620 polyester bread yarns 20 / 8s having a fiber thickness of 3.0 dtex are used. On the other hand, for the weft yarn 3, a polyester filament yarn 1100 dtex × 7 having a fiber thickness of 2.6 dtex is used, and the number of driving is 41 threads / 10 cm.

(Example 2)
As the warp yarn of the cylindrical jacket according to the second embodiment, 442 polyester bread yarns 10 / 6s having a fiber thickness of 3.0 dtex are used. On the other hand, for the weft yarn, polyester filament yarn 1100 dtex × 6 having a fiber thickness of 2.6 dtex is used, and the number of driving is 48 threads / 10 cm.

(Example 3)
For the warp yarn of the cylindrical jacket according to Example 3, 620 polyester bread yarns 20 / 8s having a fiber thickness of 1.5 dtex (breaking strength: 18%) are used. On the other hand, for the weft yarn, a polyester filament yarn 1100 dtex × 7 having a fiber thickness of 5.0 dtex (breaking strength 25%) is used, and the number of driving is 41 threads / 10 cm.

(Comparative example)
The conventional cylindrical jacket according to the comparative example is configured by weaving a warp and a weft thicker than the warp. Here, 620 pieces of polyester bread yarn 20 / 8s having a fiber thickness of 1.5 dtex (breaking strength 20%) are used as the warp yarn. On the other hand, for the weft yarn, polyester filament yarn 1100 dtex × 7 having a fiber thickness of 5.0 dtex (breaking strength 17%) is used, and the number of driving is 41 threads / 10 cm.

Example 4
A jacket hose according to the fourth embodiment will be described with reference to FIGS. Here, FIG. 8 is a half sectional view of the jacket hose, and FIG. 9 is a perspective view of the hose.
The cylindrical jacket 12 of the jacket hose 11 is formed by weaving the warp yarn 13 and the weft yarn 14 in a cylindrical shape. For the warp yarn 13 and the weft yarn 14, a polyester fiber yarn such as a polyester filament yarn is used. Further, the fiber thickness of the warp yarn 13 is 3 to 4 dtex, and the fiber thickness of the weft yarn is 2 to 3 dtex.

  A lining layer 16 a is provided inside the cylindrical jacket 12 by attaching a tube 16 via an adhesive 15, and is formed integrally with the cylindrical jacket 12. As the adhesive 15, for example, Toyobo Co., Ltd. trade name: Byron (polyester adhesive) is used. For the lining layer 16a, Toray DuPont's trade name: Hytrel (polyester thermoplastic elastomer) is used.

  According to the jacket hose having the configuration of Example 4, since the warp yarn 13 has a greater elongation than the weft yarn 14, the hose inner diameter swells and becomes thicker when the hose is being used under pressure. Therefore, the pressure loss is reduced as if a thick hose is used. Further, when the hose is used, since the hose stretches little, the pressure loss does not increase as in the conventional case. Furthermore, since the fiber thickness of the warp yarn 13 is larger than the fiber thickness of the weft yarn 14, the wear resistance can be improved as compared with the conventional case.

(Example 5)
Next, the manufacturing method of a jacket hose is demonstrated with reference to FIG.
As shown in FIG. 5, a cylindrical jacket 1 woven with 1/2 oblique weaving is twisted about its axis S, and the direction of oblique lines (the direction of ridges described later) is cylindrical jacket 1. Is set so as to be at an angle α with respect to the axis S. Next, a twist about the axis S is applied to the cylindrical jacket 1 so that the angle α of the oblique line is 10 ° when the warp yarns are spirally arranged. When the lining layer 4 made of rubber or synthetic resin is formed on the inner surface, the liquid tightness is maintained and the jacket hose 5 is completed. The jacket hose 5 can be used as, for example, a fire hose, a shape retention hose, a water absorption hose, an oil supply hose, or the like.

  The jacket hose 5 has an oblique line that is inclined 7 ° with respect to the axis S of the cylindrical jacket 1 on the inner side of the cylindrical jacket 1 and is formed linearly over the axial direction of the cylindrical jacket 1. A portion in contact with the oblique line A protrudes inside the jacket hose 5, and a plurality of linear protrusions 6 are formed along the longitudinal direction of the jacket hose 5 along the oblique line. This protrusion 6 has the effect | action which suppresses generation | occurrence | production of the turbulent flow of the fluid which flows through inside, makes pressure loss small, and improves a water flow rate. Moreover, since a plurality of linear protrusions 6 can be formed along the longitudinal direction of the jacket hose 5 without any processing on the lining layer 4, the manufacturing cost can be greatly reduced. Furthermore, since the protrusions 6 are formed by oblique lines, the jacket hose 5 is lightweight and flexible and easy to handle.

  In the fifth embodiment, the cylindrical jacket 1 woven with a twill weave is twisted about its axis S, and the direction of the oblique line A is 10 ° with respect to the axis S of the cylindrical jacket 1. However, when weaving, the warp yarn 2 is arranged spirally with respect to the cylindrical jacket 1 so that the oblique line A generated obliquely with respect to the axial line S of the cylindrical jacket 1 becomes the axial line S of the cylindrical jacket 1. The angle may be 10 °.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. For example, in the above-described embodiment, the 1/2 three-fold pattern weave has been described. Further, the number and thickness of the warps 2 can be appropriately changed depending on the purpose of use. Furthermore, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A cylindrical jacket made of a woven fabric of warp and weft, wherein the fiber constituting the warp is thicker than the fiber constituting the weft.
[2] A jacket hose having a lining layer provided on the inner surface of the cylindrical jacket according to [1], wherein the warp is made of acrylic fiber.
[3] A jacket hose comprising a cylindrical hose provided with a lining layer on the inner surface of the cylindrical jacket according to [1], wherein the weft yarn is made of nylon fiber.
[4] The cylindrical jacket according to [1], wherein the fiber constituting the warp has a thickness of 3 to 4 dtex and the fiber constituting the weft is 2 to 3 dtex.
[5] The cylindrical jacket according to [1] or [4], wherein the warp is a fiber, and the weft is a fiber, a metal linear body, a synthetic resin linear body, or a combination thereof.

  DESCRIPTION OF SYMBOLS 1,12 ... Cylindrical jacket, 2,13 ... Warp yarn, 2a ... Pattern yarn, 3, 14, 22 ... Weft yarn, 4, 16a ... Lining layer, 5, 11, 21 ... Jacket hose, 6 ... Projection, 15 ... Adhesion Agent, 16 ... tube, A ... oblique line, S ... axis.

Claims (4)

In a cylindrical jacket made of a woven fabric of warp and weft for producing a jacket hose by providing a lining layer on the inner surface ,
A cylindrical jacket characterized in that the fiber constituting the warp is thicker than the fiber constituting the weft.   A jacket hose having a lining layer provided on the inner surface of the cylindrical jacket according to claim 1, wherein the warp yarn is made of acrylic fiber.   A jacket hose having a lining layer provided on the inner surface of the cylindrical jacket according to claim 1, wherein the weft yarn is made of nylon fiber.   The cylindrical jacket according to claim 1, wherein the thickness of the fiber constituting the warp is 3 to 4 dtex and the thickness of the fiber constituting the weft is 2 to 3 dtex.

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