JP4375635B2 - hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible hose, and particularly to a fire hose and a fire hydrant hose.
[0002]
[Prior art]
Conventionally, a fire hose having a flexible rubber or synthetic resin lining formed on the inner surface of a jacket formed by weaving warp and weft in a cylindrical shape has been widely used. This type of hose has the characteristics that it can be folded flat and can be stored compactly, is light and has high pressure resistance, and can discharge a large amount of water at high pressure.
[0003]
Moreover, in the hose for a fire hydrant, what uses a rigid linear body as the weft which comprises the said jacket is also used. This can be wound and stored in a coil shape while maintaining a circular cross section, and water can be passed in the stored state.
[0004]
[Problems to be solved by the invention]
However, in these hoses, the jacket itself is sufficiently flexible, but by lining it, the warp yarn and weft yarn constituting the jacket are fixed with the rubber or synthetic resin of the lining, and the peculiar to the fabric. The tissue flexibility was lost and the hose was stiff.
[0005]
Therefore, in a fire hose, if the hose is bent with water, if the hose is stiff, it is easy to cause a so-called kink phenomenon that bends locally, and if it is dragged in such a state, a bent corner is formed. It was often worn locally and opened holes.
[0006]
In addition, in the case of the above-mentioned fire hydrant hose, if the hose becomes stiff, the bendability deteriorates, and since it cannot be bent with a small radius of curvature, it cannot be stored compactly, and the handleability also deteriorates.
[0007]
The present invention was made in view of such circumstances, and prevents the flexibility of the jacket from being impaired by applying a lining, smoothes the inner surface to reduce running water resistance, is flexible and excellent in handleability, And it aims at providing a hose with little flowing water resistance.
[0008]
[Means for Solving the Problems]
Thus, the present invention forms a tubular woven fabric by weaving a first weft arranged in a spiral and a flexible warp arranged in a ring substantially orthogonal to the first weft into a cylinder, A second weft thread is placed in a position between the first weft threads on the inner surface of the tubular woven fabric, and the second weft thread is 9-18 of the warp yarn (6) with respect to the tubular woven fabric. A jacket is formed by connecting one place for each book, and a flexible rubber or synthetic resin lining is formed on the inner surface of the jacket.
[0009]
In the present invention, it is preferable that the top surface on the inner surface side of the second weft yarn substantially coincides with or protrudes slightly from the top surface on the inner surface side of the warp yarn. The cylindrical woven fabric is preferably woven with a structure in which warp yarns appear more on the outer surface than on the inner surface. The first weft yarn may be formed of a rigid linear body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an embodiment of a hose according to the present invention. The hose 1 is formed by forming a lining 3 of rubber or a flexible synthetic resin on the inner surface of a jacket 2.
[0011]
And the cylindrical woven fabric 4 which comprises the jacket 2 consists of the 1st weft thread 5 and the warp thread 6 which cross | intersects the said 1st weft thread 5, and in this example, the 1st weft thread 5 and the warp thread 6 Is woven by plain weave.
[0012]
The first weft yarn 5 can be a foldable hose 1 using a normal yarn, but it maintains a circular cross section by using a rigid linear body such as a plastic bristle or a metal wire. The hose 1 can be bent while being kept in a state in which the water is passed, and the hose 1 can be passed with water in the state where it is housed.
[0013]
A second weft thread 7 is arranged on the inner surface of the tubular woven cloth 4, the second weft thread 7 is roughly connected to the warp thread 6, and the second weft thread 7 is connected to the tubular woven cloth 4. It has been floating for a long time inside. The density at which the second weft thread 7 is bound is suitably about one place for every 9 to 18 warps 6.
[0014]
The second weft yarn 7 is preferably soft and easily crushed by external force. For example, a spun yarn of a synthetic fiber, a bulky yarn, a twisted twisted yarn, or the like is appropriate.
[0015]
In this example, the top surface on the inner surface side of the second weft thread 7 is substantially coincident with the top surface on the inner surface side of the warp thread 6, but the second weft thread 7 is slightly protruded from the warp thread 6. You can also. The degree of protrusion of the second weft thread 7 is suitably about 0.05 to 0.2 mm.
[0016]
FIG. 2 shows another embodiment of the hose 1 of the present invention. The tubular woven fabric 4 in the jacket 2 is woven by a 2/1 twill weave structure in which the warp yarn 6 floats long on the surface. The second weft thread 7 is disposed so as to float on the inner surface for a long time and is roughly connected.
[0017]
[Action]
In a general hose, the jacket is made of a warp and a weft, and almost only the warp is exposed on the inner surface of the jacket. Therefore, the lining adheres to the warp and restrains the warp and becomes stiff.
[0018]
On the other hand, in the present invention, the second weft thread 7 floats long on the inner surface of the tubular woven fabric 4, and the second weft thread 7 has high flexibility with respect to the tubular woven fabric 4. And the lining 3 is mainly bonded to the highly flexible second weft thread 7, and the bonding range with the warp thread 6 is significantly narrowed, so that the flexibility of the jacket 2 is not lost due to the bonding with the lining 3. It becomes a soft and flexible hose.
[0019]
Further, as shown in the drawing, the second weft thread 7 is arranged between the first weft threads 5 so that the top surface is substantially coincident with the top surface of the warp thread 6 or the second weft thread 7 is slightly protruded. Thus, the unevenness of the inner surface of the jacket 2 can be reduced and the inner surface of the hose 1 can be made smooth.
[0020]
In particular, when an internal pressure is applied to the hose 1, the hose 1 extends to increase the interval between the first weft threads 5, and the internal pressure is applied to push up the inner surface of the lining 3. If the lining 3 is simply applied, the inner surface of the hose 1 is likely to be uneven.
[0021]
However, in this invention, since the 2nd weft thread 7 fills the recessed part between the 1st weft threads 5 and supports the lining 3, it becomes difficult to produce an unevenness | corrugation. Further, by slightly projecting the second weft thread 7 from the warp thread 6, the second weft thread 7 is squeezed between the first weft threads 5 by the internal pressure, and the unevenness is reduced.
[0022]
Also, as shown in FIG. 2, the tubular woven fabric 4 is woven with a twill weave structure in which warps 6 appear on the outer surface, so that the warps 6 protect the first weft 5 and improve the wear resistance. Can do.
[0023]
When such a structure is adopted in the conventional hose, the unevenness on the inner surface becomes intense and the flowing water resistance increases, but in the present invention, since the second weft thread 7 is present as described above, the unevenness can be reduced.
[0024]
【The invention's effect】
Therefore, according to the present invention, since the lining 3 is mainly bonded to the second weft thread 7 as described above, the jacket 2 is not hardened by the lining 3 and the flexibility of the hose 1 is not impaired.
[0025]
Further, since the second weft thread 7 fits into the concave and convex portions on the inner surface of the tubular woven fabric 4, the unevenness on the inner surface of the jacket 2 can be reduced, and the running water resistance of the hose 1 can be reduced by smoothing the inner surface of the lining 3. Can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the hose of the present invention. FIG. 2 is a longitudinal sectional view showing another embodiment of the hose of the present invention.
1 Hose 2 Jacket 3 Lining 4 Tubular Woven Fabric 5 First Weft 6 Warp 7 Second Weft

Claims (4)

The first weft thread (5) arranged in a spiral shape and the flexible warp threads (6) arranged in a ring substantially orthogonal to the first weft thread are formed into a tubular shape to form a tubular woven fabric (4). The second weft thread (7) is floated and disposed at a position between the first weft thread (5) on the inner surface of the tubular woven fabric (4), and the second weft thread (7) is disposed in the tubular shape. The woven fabric (4) is connected to every 9 to 18 warp yarns (6) to form a jacket (2), and a flexible rubber or synthetic resin is formed on the inner surface of the jacket (2). Hose characterized by forming a lining (3)   The top surface on the inner surface side of the second weft yarn (7) is substantially coincident with or slightly protrudes from the top surface on the inner surface side of the warp yarn (6). Listed hose   The hose according to claim 1 or 2, characterized in that the tubular woven fabric (4) is woven with a structure in which warps (6) appear more on the outer surface than on the inner surface.   Hose according to claim 1, 2 or 3, characterized in that the first weft thread (5) consists of a rigid linear body.

Images