JPS636253Y2 - - Google Patents

Description

[Detailed description of the device] This device absorbs and collects underground water in the ground of developed land, roads, farmland, etc., discharges the absorbed water, and is used to protect or strengthen the ground. Concerning the water discharge cloth pipe, the warp a is made of a spun yarn of thermoplastic synthetic resin such as polyolefin, polyester, polyamide, or a fibrous aggregate such as a split yarn, and a continuous thick monofilament hard yarn of polyolefin or polyamide. It is characterized in that it is woven into a cylindrical body c using one or several weft yarns b.

According to this invention, since the diameter yarn is made of a fibrous aggregate such as a spun yarn or a split yarn of thermoplastic synthetic resin such as polyolefin, polyester, or polyamide, the fine gaps formed in the fibrous aggregate are Due to the capillary phenomenon, water absorption is strong, and since the tube material fabric is woven into a cylinder, the mesh structure of the fabric causes an overaction, producing a water permeability effect. ,
Since the weft yarn is made of a continuous large-diameter hard monofilament of polyolefin or polyamide, it has a high mechanical strength and is extremely useful because it can prevent deformation due to earth pressure in the buried ground. .

As the fibrous aggregate of the warp yarns in this invention, spun yarn or split yarn of thermoplastic hard synthetic resin such as polyethylene, polypropylene, polyolefin, polyester, polyamide, acrylic resin, etc. is used.

Although it is necessary that the shape is cylindrical, its cross-sectional shape should be circular as shown in Fig. 1, rounded as shown in Fig. 8, and oval as shown in Fig. 9. The cross-sectional shape is determined as necessary.

Conventionally, in order to drain surplus water such as groundwater, spring water, and rainwater, cylindrical or belt-shaped drainage materials are buried in the soil or laid on the ground surface, and the soil layer due to drainage and dryness are removed. It is widely practiced to promote consolidation and stabilize the ground.

In the past, heavy objects such as unglazed tubes or concrete pipes with small holes were used as the cylindrical body due to their strength, but recently, instead of these heavy objects, The thick annular strands arranged at appropriate intervals are connected by a mesh pipe section formed of thin strands, and the mesh pipe section is made concave or convex in an annular shape to form a bellows fold. Synthetic resin underdrain mesh pipes configured in a bellows shape, synthetic resin cylinders with small holes, and net-like materials further attached to the circular or outer surface of these cylinders. A filter-like material is bonded to the inner or outer surface of a synthetic resin drain pipe spiral core material integrally formed with a net-like cylinder, or a belt material is placed between two spirally wound core materials. Lighter weight products such as those sandwiched between layers have been developed and are being used.

Furthermore, as an underdrain drain pipe, the outer pipe surface of the drain pipe, which has water permeable holes at appropriate intervals on the pipe surface, is coated with a water permeable membrane made of woven or knitted fabric with irregularities on the fabric surface. something is conventionally known.

However, these conventional structures such as synthetic resin cylinders and mesh cylinders that are integrally molded can withstand a certain level of ground load, but are weak against uneven loads due to ground fluctuations. Also, spiral core material with a filter-like material glued to the inner or outer surface is more flexible than the above-mentioned material and can withstand changes in the ground to some extent, but the core material and filter-like material Because they are glued together using adhesives, the bonded parts are weak and there may be sudden changes in the ground,
When inserting drainage material or using it for a long time, that part will break.

Furthermore, the method in which the band is sandwiched between two spirally wound cores has the same drawback in terms of strength because the band is simply sandwiched between the spirally wound cores. It had the following problems.

Furthermore, if the outer surface of the drain pipe is coated with a water-permeable membrane made of woven or knitted fabric having an uneven surface, not only the structure is complicated but also the water collection and absorption effect is low.

On the other hand, the invention of this application eliminates the drawbacks of these conventional structures and develops a structure with a strong water collection effect.

According to the invention of this application, a warp a having absorbency and perpendicularity is made of a spun yarn of a thermoplastic synthetic resin such as polyolefin, polyester, or polyamide, or a fibrous aggregate such as a split yarn;
A weft b consisting of one or a plurality of continuous hard yarns having high mechanical strength and light weight, such as a large-diameter monofilament of polyolefin or polyamide, can be used to create a material with a circular cross section, rounded corners, Since it is woven into a cylinder c with an appropriate cross-sectional shape such as an oval shape,
This makes it possible to provide a strong water collection and drainage cloth pipe with excellent water collection and drainage properties, which is extremely useful.

In this invention, as the warp, a spun yarn of thermoplastic synthetic resin such as polyolefin, polyester, polyamide, etc. or a fibrous aggregate such as a split yarn, which has water absorbency and permeability, is used. In addition, the water from the outside of the cylinder is strongly absorbed by capillary action caused by the minute gaps formed in the fibrous aggregate, and the water is absorbed by the network structure formed by the appropriate weaving density of the warp and weft. Because these functions are performed simultaneously, the water collecting and permeation effect is also significantly superior to conventional products.

In addition, as the weft yarn, one or a plurality of continuous hard yarns with high mechanical strength and light weight, such as large-diameter monofilament of polyolefin or polyamide, are used. It is not only strong but also lightweight and economical.

Further, in order to impart mechanical strength to these hard synthetic resin monofilaments (also called wires), it is more effective to use a monofilament mixed with an appropriate reinforcing filler. For example, in the case of polyamide, when 30% glass fiber is mixed in, the bending strength is improved by two to three times, and when polypropylene is mixed with 20% glass fiber, the bending strength is improved by 30%. When using a metal wire such as a piano wire, it is necessary to use a wire that has been subjected to surface treatment such as coating with synthetic rubber or synthetic resin, plating with corrosion-resistant metal, etc. in order to improve its corrosion resistance.

In addition, to the extent that there is no problem in terms of strength, these weft yarns can be combined with the above warp materials (twisted, aligned, every one or several yarns) to increase water collection and permeability and flexibility. If soft hollow fibers are used in combination, elasticity can be imparted in addition to flexibility.

Figures 1 and 2 show this invention, where a indicates the warp, b indicates the weft, and c indicates the cylindrical body.

Although the structure of this invention needs to be cylindrical, its shape does not necessarily have a circular cross section as shown in Figure 1, but can be shaped vertically or horizontally depending on the location where it is to be buried. It is extremely convenient because it can be deformed during construction work and deformed before being buried. In addition, for those using thermoplastic resin for the weft, heat setting is performed at a temperature 20 to 40 degrees Celsius lower than the melting temperature of the material.
It can be fixed to an oval, rounded corner, or any other closed cross-sectional shape.

Therefore, the thickness of the warp and weft depends on the place where the drainage material is used, the thickness of the drainage material, the pressure applied to the drainage material, the hardness of the wire of the weft material (mainly bending strength), and the weft. The density can be selected as appropriate depending on the density of the thermoplastic resin wire, but when the thermoplastic resin wire is polyamide-based nylon 6 wire, the
The diameter is approximately 0.5 to 1.5 mm in the case of polyolefin-based polypropylene mixed with 30 to 50% inorganic reinforcing filler. In this case, the warp thickness is 20'S/5 to 20'S/10 for polyester spun yarn, 1000 ^d to 3000 ^d for continuous yarn, and 1000 ^d for polypropylene split yarn.
3000 ^d is reasonable.

In the case of the 100mmφ drainage cloth pipe that was prototyped in this idea, the warp was made of polypropylene split yarn 1200d/2 oiled.
Using 688 wefts, polypropylene wires with a diameter of 2.5 mm were inserted at a density of 24 wires per 10 cm, resulting in a lightweight product with a weight of 800 g/m and good water collection and permeability.

The weaving method was to use a known circular loom to interweave a plain weave, but it could be either a twill weave or a satin weave, but while weaving a wire with high hardness and rigidity, it was necessary to suppress the tightness and stabilize the weave. A flat structure with many tissue points is most suitable, and the structure is not disturbed during the construction work for use, and it has an average water collection permeability over the entire surface, and has an excellent drainage effect. It is something that we have.

In Fig. 3, a synthetic resin monofilament 1 is used as the weft b, and this monofilament may be made of multiple continuous threads such as 3 as shown in 1', 1'', and 1 in Fig. 4. Alternatively, monofilaments made of different materials may be used.

Further, in FIG. 5, monofilament 1 and two fibrous aggregates (spun yarn) 2 arranged in parallel are alternately used as the weft yarn b.

In the case shown in Fig. 6, monofilament tubes 3 are used alternately, and in the case shown in Fig. 7, fibrous aggregates (spun yarn) 2',
2' is added and used alternately.

According to this invention, it is used as a collection and drainage pipe in road construction, land reclamation work, embankment work, land improvement work, etc. At that time, the fine structure of the fibrous aggregate of warp threads, the warp threads, and the weft threads are formed. Due to the mesh structure, it has both water absorption and water absorption functions as well as water flow function as a pipe, so it does not cause clogging, and in some cases, it is not necessary to place cracked stones etc. around the cylinder, making it easy to make grooves. It is also possible to produce sufficient water collection and drainage effects even if the water is buried without water.

In addition, the weft yarns constituting the tube wall of the cloth tube material of this invention are held in a spiral shape at regular intervals by the warp yarns, and are tightly gripped, forming an integral structure with the warp yarns, so that the organization is not disturbed. Therefore, the strength of the cylinder is high. In addition, the moderate elasticity of the warp yarns and the spiral structure of the weft yarns provide flexibility to the cylindrical body, so that it can be bent freely at desired locations.

In this way, the drain cloth pipe material of this invention is lightweight due to its lean structure and uses lightweight materials, so
It is extremely lightweight and flexible, making it very convenient to transport and install.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of this invention, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is an enlarged sectional view of section A in Fig. 2, Figs. 4, 5, and 6. , FIG. 7 is an enlarged sectional view of other embodiments of that part, FIGS. 8 and 9.
The figure shows a sectional view of another embodiment of the invention. In the figures, the same reference numerals indicate the same or equivalent parts, a is the warp, b is the weft, c is the cylinder, 1, 1',
1″, 1 is a synthetic resin monofilament, 2,
2' is a fibrous aggregate, and 3 is a monofilament tube.

Claims (1)

[Scope of utility model registration request] A warp a made of a spun yarn of a thermoplastic synthetic resin such as polyolefin, polyester, or polyamide, or a fibrous aggregate such as a split yarn, and one or an appropriate number of continuous large-diameter monofilament hard yarns of polyolefin or polyamide. A cloth pipe for collecting and discharging water, characterized in that it is woven into a cylindrical body c by wefts b consisting of books.