JPH0519673Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a water supply or drainage hose, which is particularly capable of supplying and discharging a relatively large amount of liquid at a relatively high pressure, and which can be used when not in use. This relates to a hose that can be folded flat.

BACKGROUND TECHNOLOGY Conventionally, so-called spiral hoses have been used for the above-mentioned purpose, in which a spiral wire, hard synthetic resin brittle, etc. are embedded within the thickness of a cylindrical body made of soft synthetic resin. .

Furthermore, as mentioned above, a hose that can supply and drain a large amount of liquid at high pressure and that can be folded flat when not in use is made of a cylindrical jacket made of densely woven fibers with soft rubber or Fire hoses with a synthetic resin lining are known.

Problems to be Solved by the Invention However, the spiral hose cannot be folded flat even when not in use, and is too bulky to be stored compactly.

Furthermore, fire hoses are required to be extremely light and compact, and to withstand high pressures of several tens of kg/cm ² due to the requirements associated with their original use. However, water supply and drainage hoses used for normal industrial purposes are not required to meet such severe conditions, and although fire hoses are extremely suitable as water supply and drainage hoses, they are of excessive quality and are not necessary. It had the above performance and was expensive.

Conventional fire hose jackets have been woven into a cylindrical shape using an ordinary narrow loom with a reciprocating shuttle type or a circular loom in which a shuttle of weft threads rotates by sewing between circularly arranged warp threads. Although these looms can produce excellent seamless jackets, the above-mentioned looms have poor weaving efficiency, making it impossible to produce inexpensive hoses.

Further, a needle loom is known as a weaving machine with high speed and efficiency, and it is known that the needle loom can weave at extremely high speed and at low cost. However, when weaving with a needle loom, the weft threads are not continuous at one edge of the fabric, and it is necessary to stitch it together using a different stitch structure to form a tube. Therefore, when weaving a hose jacket, the strength of the selvedge is inferior,
As the pressure resistance of the hose decreases, the portion where the ears are bound protrudes from the surface of the hose and is extremely easily damaged by external force, causing the bound portion to come undone and cause the hose to break.

The present invention was devised in view of the above circumstances, and is a fire hose type hose consisting of a cylindrical jacket with a soft synthetic resin lining on the inner surface.The jacket is woven using a needle loom to achieve pressure resistance. The object of the present invention is to provide a new hose structure which, although slightly inferior to conventional fire hoses, is sufficiently usable as a water supply and drainage hose and can be provided at a low cost.

Means to Solve the ProblemsThe present invention is based on the idea that the weft is woven into a cylindrical shape using a needle loom, and the loop formed at the edge of the weft is bound to a thickness of about 1/8 to 1/2 of the weft. A synthetic resin inner lining is formed on a jacket that is bound with a stitch structure with threads running along it, and the stitches of the selvedge are made to protrude inward of the jacket, and the stitched portion of the selvedge is located approximately in the center. It is characterized by being folded flat.

FIG. 1 is a perspective view of the hose of the present invention in an inflated state during use, and the inner surface of the jacket 1 is provided with a lining 2 of synthetic resin. Reference numeral 3 denotes an ear portion of the jacket 1 during weaving, and when not in use, the ear portion 3 is folded flat so that the ear portion 3 is located approximately at the center.

FIG. 2 is a schematic diagram showing the structure of the jacket 1. The jacket 1 is made by weaving warp yarns 4 and weft yarns 5, and the warp yarns 4 are outer warp yarns 4a.
and the back warp 4b are arranged, and the weft 5 is also twisted with the front weft 5a and the back weft 5b, and the front warp 4a and the front weft 5a, and the back warp 4b and the back weft 5b are each woven with a plain weave structure, It has a vertical bag weave.

In the present invention, the jacket 1 is woven using a needle loom. This needle loom uses a needle 6 through which a weft thread 5 is passed through a hole at the tip, and a warp thread 4.
Insert the weft thread 5 into the opening and pull it back.
are driven into the same opening, and the front weft thread 5
A and the back weft thread 5b are driven in alternately. Then, the loop 7 formed at the tip of the inserted weft 5 is hooked onto the latch needle 8, and the loop 7 stitch structure is knitted with the latch needle 8, and the front weft 5a and the back weft 5b are stitched together. is formed to weave a cylindrical jacket 1.

Furthermore, in the present invention, when binding the ears 9,
A binding thread 10 having a thickness of about 1/8 to 1/2 of the weft thread 5 is passed along the loop 7 of the weft thread 55, and the binding thread 10 is
is knitted together with the loop 7 into a stitch structure using latch needles 8.

In FIG. 2, latch needles 8 are used to form the ears 9, but it is also possible to use a forming loom that uses a hook instead of the latch needles 8.

In the present invention, the jacket 1 thus obtained is provided with a lining 2 made of synthetic resin. In order to form this lining 2, it is preferable to use the inside-out method. That is, the outer surface of the jacket 1 constructed as described above is covered with an extruded synthetic resin tube, and the pressure inside the jacket 1 is reduced to tightly cover the outer surface of the jacket 1 with the tube. Then, the inner and outer surfaces of the jacket 1 covering the tube are turned over, and the tube is used as the lining 2 for the inner surface of the jacket 1. Suitable materials for the lining are polyurethane and polyester elastomers, particularly flexible ones with a Shore A hardness of less than 80 degrees and a tensile stress at 50% elongation of 35 kg/cm ² or less. This makes it possible to uniformly form a very flexible, highly elastic, and tough lining.

Although it is possible to use cheaper soft vinyl chloride resin as the material for the lining 2, when using the hose, repeated operations such as stretching, water passage, and winding are required, and when the hose is folded flat, Since stress is concentrated at the folded part of the plastic, soft vinyl chloride resin may harden due to the leaching of plasticizer, which may cause cracks in the folded part.
Undesirable.

In the present invention, since the jacket 1 is woven by a needle loom, there is a selvage 9 in a part of the jacket 1, and the selvage 9 has a thick weaving structure of the jacket 1 and the stitches protrude. In the invention, the stitches of the ears 9 are made to protrude inward from the jacket 1, and the binding portions of the ears 9 are folded flat so that they are located approximately in the center, so the surface of the hose is smooth and weak. There is no possibility that the stitches of the ears 9 will be damaged and the hose will break.

The stitches of the ears 9 are usually knitted from the outside of the jacket 1, so they protrude outward, but by forming the lining 2 by the inside-out method as described above,
During weaving, outwardly protruding stitches can be made to protrude inwardly.

Effects of the invention According to the invention, since the jacket 1 is woven by a needle loom, it can be woven at extremely high speed, and the hose has good weaving efficiency and is inexpensive.

Jacket 1 woven using a needle loom
In a hose made of yarn, the selvage 9 becomes the weakest point during weaving, and if the loop 7 is damaged at the selvage 9, the stitches will fray and expand rapidly, causing the hose to break immediately. According to the present invention, since the stitches are made to protrude inward of the jacket 1, the loops 7 are not damaged by external forces. Furthermore, even if it is damaged for some reason, since the binding thread 10 is stretched along and woven, the damage will not spread rapidly and the withstand pressure will not decrease. This binding thread 10 is designed to effectively prevent the stitches from fraying and to prevent the loops 7 from protruding excessively.
It is appropriate to make it about 1/2 the thickness.

The lining 2 is made by closely covering the outer surface of the jacket 1 with a synthetic resin tube.
By turning over and forming the lining 2 on the inner surface, the inwardly projecting ears 9 are also covered with the lining 2 with a uniform thickness, and the lining of the ears 9 will not become thin and pinholes will not occur.

Furthermore, when the hose is not in use, it is folded flat so that the ear part 3 at the time of weaving is approximately in the center, so the weak ear part 3 will not be damaged by friction, and the loop 7 will prevent the hose from protruding inward. It does not get in the way of folding.

As described above, according to the present invention, the jacket 1 can be woven at a very high speed.
It can be manufactured efficiently and at low cost. Additionally, the selvage 9 created when weaving the jacket 1 appears on the hose, and although it cannot be denied that this is a weak point as a hose, this shortcoming has been minimized and the pressure resistance is somewhat inferior to that of a fire hose made of the same thread. However, it is a hose that can withstand use as a water supply and drainage hose for work.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the hose of the present invention, and FIG. 2 is a schematic diagram showing the structure of the jacket of the hose of the present invention. 1... jacket, 2... lining, 5...
Weft thread, 7...loop, 10...binding thread.

Claims (1)

[Scope of utility model registration request] The jacket is woven into a cylindrical shape using a needle loom, and the loops formed at the ears of the weft are bound with a binding thread approximately 1/8 to 1/2 the thickness of the weft, using a stitch structure. A hose, characterized in that the inner lining is formed of synthetic resin, the stitches of the ears are made to protrude inwardly of the jacket, and the hose is folded flat so that the binding part of the ears is located approximately in the center. .