JP4249819B2 - Hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hose used for a hose-type flexible expansion joint used for flush fittings for kitchens and washstands, toilet water storage tanks, and other water supply and hot water supply pipes.
[0002]
[Prior art]
Conventionally, copper pipes and stainless steel bellows pipes have been used for storage tanks for kitchens, washstands, toilets, and other water supply and hot water supply pipes. However, the pipe itself used here was poor in flexibility, and the workability of the piping work was poor.
[0003]
Therefore, in recent years, a hose in which the inner surface layer is mainly made of rubber or thermoplastic elastomer and the outer periphery thereof is braided and reinforced with a flexible hose such as stainless steel wire, nylon, polyester, etc. Type flexible expansion joints have been used. However, the space for piping work is relatively narrow, and the length to be used is short, so that external force is applied such as forcibly bending during the construction of the hose-type flexible expansion joint or contacting with surrounding members. There are many. For this reason, although the hose type flexible expansion joint is excellent in flexibility, the reinforcing material is not so high in rigidity that it is bent when an external force exceeding a certain level is applied. When the hose is bent, the water passage is blocked, and the amount of water flow may be reduced or water passage may not be possible.
[0004]
For this reason, in some cases, there is a method to prevent the hose from being bent by inserting a spring inside the hose. However, if the spring is inserted, the water flow diameter will be reduced by that amount, and sound will be generated during water flow. There is a problem.
[0005]
Although a hose reinforced with braided stainless steel wire for springs has been considered, the pressure resistant performance is not sufficient with only the stainless steel wire for springs, and therefore it is necessary to increase the knitting density. For this purpose, it is necessary to increase the number of wires or increase the wire diameter. However, when this measure is used, it is necessary to increase the knitting tension at the time of knitting, and there is a drawback that it is difficult to produce because the phenomenon that the hose is crushed at the time of braiding occurs.
[0006]
[Problems to be solved by the invention]
The present invention braids a stainless steel wire for springs with high rigidity inside the braided reinforcing layer with low rigidity so as not to impair the flexibility of the hose and to provide a hose that is strong against bending due to external force during pipe construction. It is to provide.
[0007]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and the gist of the present invention is that an inner surface layer made of rubber or a thermoplastic elastomer and at least two braided reinforcing layers on the outer surface of the inner surface layer. A hose comprising: an inner reinforcing layer made of a stainless steel wire for springs , wherein the inner reinforcing layer has a rigidity higher than that of the inner reinforcing layer. It is characterized by lower than .
[0008]
Specifically, the wire diameter of the spring stainless steel wire is 0.15 to 0.5 mm, the braid angle is 50 to 60 degrees with respect to the longitudinal direction of the hose, and the braid density is 0%. It is preferable to exceed 50% and not more than 50%.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
In the hose of the present invention, as described above, the inner reinforcing layer is braided on the outer surface of the inner surface layer with a stainless steel wire for a spring, so that the hose itself is not damaged and is bent by an external force. The water flow diameter can be maintained. In addition, as the inner surface layer, rubber or thermoplastic elastomer is preferably used, and this constitutes the inner surface layer by single layer or lamination.
[0010]
The inner reinforcing layer uses at least a stainless steel wire for spring (JIS · G · 4314), and its wire diameter is preferably 0.15 to 0.5 mm, which is less than 0.15 mm. As a result, the rigidity of the wire is lowered and the force against bending of the hose is weak. On the other hand, if it exceeds 0.5 mm, the flexibility of the hose is impaired by the rigidity. In consideration of the force and flexibility against the bending force of the hose, it is preferable that the braid is knitted at an angle of 50 to 60 degrees with respect to the longitudinal direction of the hose.
[0011]
The stainless steel wire for springs is generally made of SUS304 or SUS316, and other members as a reinforcing layer are made of fiber yarns such as nylon and polyester, or soft metal wires such as copper and stainless steel. obtain.
[0012]
An outer surface layer may be provided outside the reinforcing layer, and an intermediate layer selected from rubber or a thermoplastic elastomer may be interposed between the two reinforcing layers. Such an outer surface layer is provided with an appearance and used for protection of the reinforcing layer, and this protection is required particularly when reinforcing with fiber yarns. As a material used for the outer surface layer, rubber such as EPDM having good weather resistance and thermoplastic elastomer such as vinyl chloride resin are used.
On the other hand, the intermediate layer is used when contact between the reinforcing layers is not preferable, or when the reinforcing layers are desired to be bonded (adhered) to each other, and rubber or thermoplastic elastomer of the same quality as the outer surface layer is used.
[0013]
【Example】
Hereinafter, the hose of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a side view showing a first example of the hose 1 according to the present invention. Reference numeral 2 denotes an inner surface layer forming the innermost layer of the hose, and in this example, is made of an olefin elastomer. Reference numerals 3a and 3b are reinforcing layers braided on the outer peripheral surface of the inner surface layer 2, and the inner reinforcing layer 3a uses a stainless steel wire for springs. In this example, the steel wire used has a wire diameter of 0.25 mm and a knitting angle of 55 degrees. The reinforcing layer 3b is a stainless steel wire and is knitted as it is on the reinforcing layer 3a.
The hose obtained here has an inner diameter of 9 mm, an inner layer thickness of 1.5 mm, and an outer diameter of 13.6 mm.
[0014]
In addition, although the hose which does not have the 3a layer of the said Example was made into the comparative example, when the difference of both performance takes the graph of curvature and the flatness (short diameter / long diameter) of a bending part, in the comparative example, flatness is Kink was produced at 70% or less, and the curvature was about 40. However, in the examples, the flatness was maintained at 89% even when the curvature was 40, and no kink was produced even at a curvature of 60.
[0015]
FIG. 2 shows a modified structure example of the hose 1 of the present invention, in which a vinyl chloride resin layer is formed as the outer surface layer 4 on the outer peripheral surface of the reinforcing layer 3a. In FIG. 2, the outer surface layer is covered in order to make the appearance color and to protect the reinforcing layer with fiber yarns.
[0016]
FIG. 3 shows a further modification of the hose 1 of the present invention, in which a vinyl chloride resin layer is formed as the intermediate layer 5 between the reinforcing layers 3a and 3b shown in FIG. In FIG. 3, the reinforcing layers 3a and 3b are bonded.
[0017]
FIG. 4 shows the hose 1 provided with the outer surface layer 4 and the intermediate layer 5 at the same time. FIG. 4 provides the combined effect of FIG. 2 and FIG.
[0018]
【The invention's effect】
The present invention braids a stainless steel wire for springs with high rigidity inside a braided reinforcing layer with low rigidity, so that the hose flexibility is not impaired, and a hose strong against bending due to external force during pipe construction is obtained. It was possible to provide, and it was possible to ensure the simplicity of work at the time of piping construction and the improvement of durability.
[Brief description of the drawings]
FIG. 1 is a structural example showing a hose of the present invention.
FIG. 2 is a first modified structure example of the hose of the present invention.
FIG. 3 is a second modified structure example of the hose of the present invention.
FIG. 4 is a third modified structure example of the hose of the present invention.
[Explanation of symbols]
1. The hose of the present invention,
2. The inner layer of the hose,
3a ... Stainless steel wire for spring,
3b ... outer reinforcement layer,
4. External layer
5: Middle layer.

Claims (4)

A hose comprising an inner surface layer made of rubber or thermoplastic elastomer, and at least two braided reinforcing layers on the outer surface of the inner surface layer,
Of the reinforcing layers, the inner reinforcing layer is made of a stainless steel wire for spring, and the rigidity of the outer reinforcing layer is lower than that of the inner reinforcing layer. -Su.   The hose according to claim 1, wherein the diameter of the spring stainless steel wire is 0.15 to 0.5 mm.   The hose according to claim 1 or 2, wherein the braiding angle of the spring stainless steel wire is set to 50 to 60 degrees with respect to the longitudinal direction of the hose. 4. A hose as set forth in claim 1 , wherein the braid density of the stainless steel wire for spring is more than 0% and not more than 50%.

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