JP5182772B2 - Fire hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fire hose, and more particularly to a fire hose that is less likely to generate kinks.
[0002]
[Prior art]
During fire extinguishing work, the fire hose is extended while connecting one end to the fire hydrant and the other end to the fire site in order to connect the necessary number, and the last fire hose end is connected to the nozzle. To discharge water. In order to move the nozzle to various places according to the fire situation, the fire hose is also dragged along with the movement and moves on the ground.
[0003]
When an extreme bending load is applied to the fire hose for some reason during the fire extinguishing work as described above, as shown in FIG. 3, the kink K bent into a V shape on the inner peripheral side of the curved portion of the fire hose 1 May occur. When such a kink K occurs, the water passing area of the fire hose 1 becomes substantially zero or is narrowed down, so that the water passing stops or the water passing amount becomes extremely small. There was a problem that the fire extinguishing work became impossible after the decrease.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a fire hose that solves the above-described conventional problems and is less likely to cause kinking.
[0005]
[Means for Solving the Problems]
A fire hose of the present invention that achieves the above object is a fire hose in which a liner layer is internally attached to a jacket woven in a cylindrical shape from warps and wefts, and is flattened when water is not passed through the jacket. both the weave is a twill 2 / 1,2 / 2 or 3/3, fineness of the weft is above 1100 dtex, end count of the weft yarn (30 lines / 50 mm width) or higher, (sixty / 50 mm width ) And the outer surface of the jacket is coated with a water repellent .
[0006]
The kink that occurs on the curved inner peripheral surface of the fire hose occurs because stress concentrates in one place corresponding to the V-shaped apex. These kinks occur because the fire hose is flattened and rolled when there is no water flow. However, according to the fire hose of the present invention, since the jacket is a 2/1, 2/2 or 3/3 twill weave , the woven structure point is particularly reduced as compared with the plain weave, so that the stress is reduced. It becomes easy to disperse, and the number of driven wefts per 50mm width is 30 or more and 60 or less so that the deformation of the inner peripheral surface of the hose is not concentrated on one place but distributed to many wefts. It can be absorbed to make it difficult to generate kinks.
[0007]
Also, since the outer surface of the jacket is coated with a water repellent agent, the outer surface of the fire hose will not be wetted by the water film on the ground, and the frictional resistance associated with the wetting will not be increased. It is not affected by the bending action caused by the friction force when it is rotated, and the kink prevention action can be further improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the jacket forming the skeleton of the fire hose is woven in a cylindrical shape from warps and wefts, and the woven structure is 2/1, 2/2 or 3/3 twill as described above. Made. The warp and weft may be synthetic fibers, natural fibers, filament yarns, or spun yarns.
[0009]
Since the twill weave structure has a smaller number of textures than the plain weave structure, when the fire hose is subjected to a bending action, the bending resistance is easily reduced and the stress is easily dispersed in the longitudinal direction of the hose. Therefore, it is possible to make it difficult to generate kinks. Further, when the twill weave structure is expressed as a twill weave of “ hose outer float / hose inner sink”, it is the above-mentioned that a woven structure selected from the group of 2/1, 2/2 and 3/3 is used. It is important in terms of the effect. Of these, a 2/1 twill structure is particularly preferable.
[0010]
Furthermore, in the twill weave structure, the number of driven wefts per 50 mm width is 30 or more and 60 or less, preferably 35 or more and 60 or less . Since the number of driven wefts per 50 mm width in a jacket used in a conventional fire hose is about 25, it is characterized by being denser than this. As described above, the number of wefts per 50 mm width is made as dense as 30 or more and 60 or less , so when the fire hose is subjected to a bending action, the deformation of the curved inner surface is not concentrated in one place, It can be dispersed and absorbed by the weft. Therefore, in combination with the twill weave structure, it is possible to make it more difficult to generate kinks in the fire hose of the present invention.
[0011]
The number of wefts driven per unit width is preferably increased as the nominal diameter increases, depending on the nominal diameter of the hose. That is, especially as the nominal diameter is further increased from 50 mm or more, the number of wefts per 50 mm width is set to 35 or more, more preferably 38 or more. The upper limit of the number of wefts per 50 mm width is set to about 60 .
[0012]
The fineness of the weft yarn, it is important to use a yarn of more than 1100 dtex, without concentrating the deformation of the hose bent inner peripheral face in one place, for the number of each weft, more effectively dispersed absorbed kink effect on the hardly generates, it is to use more than the thickness of the weft yarn 1100 dtex.
[0013]
In the present invention, in addition, the jacket structure as described above in the particular twill, and the end count of the weft over the specified value in addition to the dense, by coating a water repellent jacket outer surface , thereby further increasing the kink preventing effect. In other words, the ground may be flooded at the fire site to form a water film, but if the fire hose comes into contact with the water film and the jacket becomes wet, the frictional resistance when dragging the ground increases. It becomes easy to generate kinks due to excessive frictional force from the ground.
[0014]
By coating the outer surface of the jacket with a water repellent as described above, the jacket always maintains a dry state even when it comes into contact with the water film, so the increase in kink due to the frictional force as described above can be eliminated. .
[0015]
Silicone is preferable as the water repellent used for coating. It is important that the type of silicone has water repellency, and it is not particularly limited as long as it has water repellency . Preferably, the main chain is from an organosiloxane bond (SiR ₂ O) _n. Silicone rubber is good.
[0016]
Confirmation of the kink prevention effect of the fire hose can be easily performed by a measuring method as shown in FIG.
[0017]
First, the target fire hose is filled with water and loaded with a pressure (water pressure) of 0.4 MPa, and is sandwiched between the two plates 20 and 20 as shown in FIG. The hose is bent and the minimum bending radius r immediately before the occurrence of kinks is measured (0.4 MPa corresponds to the water pressure at the nozzle outlet when water is discharged from the fire hose). As the minimum bending radius r is smaller, it means that the hose is less likely to generate kinks.
[0018]
According to the fire hose of the present invention, the minimum bending radius r can be 25 cm or less, more preferably 20 cm or less.
[0019]
1 (A) and 1 (B) exemplify a main part at the time of non-water passage for an embodiment of a fire hose of the present invention.
[0020]
As shown in FIGS. 1A and 1B, the fire hose 1 is configured such that a liner layer 3 is attached to the inner surface of a cylindrical jacket 2 and a water repellent 4 is coated on the outer surface. . The tubular jacket 2 is woven by arranging a large number of warp yarns 2a in a ring shape in the longitudinal direction of the hose and driving them so that the weft yarns 2b intersect. The weft 2b is inserted in a spiral manner so as to continuously circulate in the circumferential direction of the cylindrical jacket 2 in units of 1 to 3, and the 2/1, 2/2 or 3/3 twill described above. Try to form an organization.
[0021]
The liner layer 3 attached to the inside of the jacket 2 is provided as a seal layer. The liner layer 3 is made of a soft resin such as vinyl chloride, polyurethane, or polyester, or natural rubber or synthetic rubber.
[0022]
As described above, the water repellent 4 is provided so that when the fire hose 1 comes into contact with the water film on the ground, the jacket 2 is not wetted by the water. Since the jacket 2 always maintains a dry state, the fire hose 1 can maintain a high kink prevention effect.
[0023]
【Effect of the invention】
As described above, according to the fire hose of the present invention, since the woven structure of the jacket is a 2/1, 2/2 or 3/3 twill weave, the woven structure point is reduced as compared with the case of the plain weave and the stress is reduced. the easily dispersed, moreover, in particular, the weft fineness of 1100dtex above, by that the end count per 50mm width of weft yarns closely with 30 or more 60 present less deformation of the hose bent inner peripheral face Can be dispersed and absorbed in a large number of wefts without concentrating them in one place, making it more effective to make kinks less likely to occur. Furthermore, by coating the outer surface of the hose jacket with a water repellent, the kink prevention effect is increased, that is, in the fire site, the ground may be submerged to form a water film. With the fire hose of the case, the hose jacket does not become wet even when it comes in contact with the water film, and as a result, the frictional resistance does not increase even when dragged on the ground, and it receives extra frictional force from the ground etc. It is possible to prevent the occurrence of kinks.
Each of these effects synergistically brings about a great effect, and the fire hose of the present invention is remarkably hard to generate kinks and realizes a quick and effective fire fighting operation.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows a main part of a fire hose according to an embodiment of the present invention when water is not flowing, (A) is a front view, and (B) is a view taken in the direction of arrows XX in (A).
FIG. 2 is an explanatory diagram of a method for measuring a kink prevention effect of a fire hose.
FIG. 3 is an explanatory diagram of kinks generated in a fire hose.
[Explanation of symbols]
1 Fire hose 2 Jacket 2a Warp 2b Weft 3 Liner layer 4 Water repellent K Kink

Claims (2)

Liner layer is laminated inside the warp and weft jacket woven in a cylindrical shape, and when Hitsu water is a fire hose being flattened, the jacket of weave 2 / 1,2 / 2 or 3 / 3 of both When it is twill, fineness of the weft is above 1100 dtex, end count of the weft yarn (30 lines / 50 mm width) or more, or less (sixty / 50 mm width), and the outer surface of the jacket Fire hose characterized by being coated with a water repellent . The fire hose according to claim 1, wherein the water repellent is silicone.

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