JP2009068146A - Flexible hollow tubular conduit and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible hollow tubular conduit scarcely flowing a placed concrete liquid before hardening into the conduit, having strength without collapsing even when buried and flexibility though having high drainage efficiency, usable by freely bending and capable of easily carrying out separation by burning degradation during dismantling recycling of concrete though the conduit is extremely readily producible. <P>SOLUTION: The tubular hollow conduit forms a structure covered with multifilaments of 4,000-20,000 dtex multifilament thickness prepared by bundling 20-20,000 filaments having a mesh opening of 1-200 dtex in a hollow tube having the surface of a mesh structure in which resin monofilaments having a diameter of 0.5-2.5 mm are crossed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a flexible tubular hollow conduit that is embedded in various wet materials and is responsible for water extraction, particularly water that has been embedded in a concrete structure and has penetrated into the concrete, and surplus generated when the placed concrete is cured. The present invention relates to a flexible tubular hollow water conduit for discharging water to the outside and a method for manufacturing the same.

  Conventionally, as the drainage of surplus water and osmotic water when the concrete hardens (hereinafter referred to simply as osmotic water drainage), a large number of holes are embedded in the concrete structure. A perforated hollow metal tube provided with is known. However, such a perforated hollow metal tube is not flexible and takes time to install, and since the side wall has a relatively large number of holes, the cast concrete before hardening is located inside the water conduit. It was easy to flow into the water and had the problem of hindering water conveyance function due to clogging.

  In addition, such a water conduit is used in a place where osmotic water or the like tends to stay inside a concrete structure, such as a bridge or a steel floor slab of a building (deck) so that the osmotic water can be discharged efficiently. Plate) and buried in concrete.

  For such problems, a fiber layer cover is installed around a metal or resin spring tube as a water conduit with improved workability due to bendability (hereinafter simply referred to as flexibility) and a function to prevent clogging. It has been proposed that the provided conduit or the conduit can be diverted to the seepage water drainage of concrete (Patent Documents 1 to 3), and this conduit has its flexibility and the fiber cover layer prevents the inflow of concrete. Appreciated by the effect.

  However, when the spring embedded in the concrete is made of metal, the spring tube is firmly integrated with the concrete, and it is very difficult to separate the concrete structure when dismantling it. Recently, from the viewpoint of effective use of resources, there is a demand for a water guide pipe that can be easily separated when disassembling a water guide pipe member and a concrete structure based on recycled raw materials. In addition, in the case of a spring tube, the pitch is easily spread by applying force, and the shape stability is inferior. Further, in order to manufacture such a water guide tube, the surface of the spiral tube prepared in advance is used as a fiber. A process of winding a sheet or covering a cylindrical fiber sheet is required, and there is a problem in terms of complexity of the manufacturing process.

Utility Model Registration No. 3094202 Japanese Patent No. 3391958 Japanese Patent Laid-Open No. 9-95926

  The present invention has been made in order to solve the problems of the prior art as described above, and the poured concrete liquid before hardening hardly flows into the inside of the water conduit and has high drainage efficiency. It has a strength that does not crush even if it is embedded, is flexible, can be bent and used freely, and is a water pipe that is extremely easy to manufacture. The present invention provides a flexible tubular hollow water conduit that can be easily separated by combustion decomposition at the time of dismantling regeneration and a method for producing the same.

  That is, the present invention is a tubular hollow conduit having a structure in which a mesh space is covered with a fiber material in a hollow tube having a mesh structure surface in which resin wires intersect.

Preferably, the resin wire is a resin monofilament having a diameter of 0.5 to 2.5 mm, while the fiber material is a resin multifilament in which 1 to 200 dtex filaments are converged, This is a case where the filament thickness is 4000 to 20000 dtex. Preferably, the fiber material is a non-twisted yarn or a low-twisted yarn of 60 T / m or less, and the mesh gap formed by the resin wire is covered with the non-twisted or low-twisted fiber material as described above. In this case, the size of each gap formed as a result of the covering is 2 mm ² or less. Furthermore, it is preferable that both the resin wire and the fiber material are made of a resin having no halogen element. The tubular hollow conduit of the present invention is used by being embedded in concrete.

  As a preferable manufacturing method, the resin wire and the fiber material wound around different bobbins are mixed in the same braiding machine, and the distance between the adjacent resin wires is the same and the fiber material is at least between the adjacent resin wires. A method of manufacturing a tubular hollow water guide tube that is attached so that one is inserted and braided at the same time is mentioned, and a method of braiding a fiber material on a hollow tube having a mesh structure surface in which resin wires intersect each other Is mentioned as another production method.

  The flexible tubular hollow water conduit obtained by the present invention is such that a tubular mesh made of a resin wire is flexible and forms a hollow tube structure capable of withstanding concrete placing load, and the fiber material covering the mesh gap has a water permeability function. It is formed only from combustible resin wire and fiber material, while discharging the surplus water (permeated water, etc.) generated when the placed concrete hardens, while allowing the uncured concrete to pass through. Thus, when the concrete is demolished and regenerated, it can be easily separated by combustion decomposition, which is useful. Furthermore, it can be widely used and useful for other purposes such as soil improvement and drying of moist powder while allowing the passage of liquid or gas while preventing the inflow of solid substances into the tube.

  Thus, the tubular hollow water conduit of the present invention is a hollow tube having a mesh structure surface in which resin wires intersect, and the mesh gap is covered with a fiber material. The mesh is flexible and forms a hollow tube structure that can withstand the loading load of concrete, and the fiber material that covers the mesh gap has a water permeability function, so surplus water generated when the placed concrete hardens (permeated water, etc.) ) Is discharged to the outside, the concrete liquid before curing does not pass through the mesh, and is formed only from combustible resin wire and fiber material. It can be done easily. And since the resin wire has a crossed mesh structure, there is no problem that the spiral gap easily expands when it is extended and installed like a conventional spiral tube.

  Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a preferred example of a flexible tubular hollow water conduit obtained by the present invention, which is a flexible structure constructed by alternately braiding resin wire 1 and fiber material 2 at a joint angle 3 at the same time. This is a tubular hollow water conduit 4.

  The diameter of the flexible tubular hollow water conduit of the present invention is not particularly limited. However, in the embedding in a bridge concrete structure, which is expected to be used mainly, the amount of water penetrating into the concrete and the formed hollow It is necessary to take into account the strength reduction due to the part, and the inner diameter is preferably about 5 to 25 mm, more preferably the inner diameter is 8 to 8 mm, from the results of the existing perforated hollow metal tube and the metal spring with cover. It is about 15 mm, and most preferably the inner diameter is about 10 mm.

  The resin wire and fiber material of the present invention can use any resin, but it is preferably one that can be decomposed by combustion during concrete regeneration and does not generate harmful gases. Of these, a resin composed of a resin that does not have a hydrogen atom in the molecule is preferable, and typical resins satisfying these functions with general-purpose resins include polyester resins, polyolefin resins, and cellulose resins. Furthermore, when considering how to use the product, it is generally integrated with an embedded structure (concrete for main use), and it is almost impossible to reuse after dismantling the structure. Therefore, it is preferable to use a recycled material from the environmental viewpoint, and it is most preferable that the recycled polypropylene resin and the recycled polyester resin are easily available.

The resin wire does not limit the shape of the wire, but a cylindrical shape is preferable from the viewpoint of stability during braiding, and the wire diameter is preferably 0.5-2. 5 mm is preferable, more preferably 0.8 to 2.0 mm, and still more preferably 1.0 to 1.5 mm.
Preferably 0.5 to 15 mm ² as mesh space formed by a resin wire together, or in a direction perpendicular to the resin wire length direction of the mesh spaces formed by the spacing of the resin wire (i.e. a resin wire adjacent neighboring The width is preferably 0.5 to 10 mm in order to withstand the concrete pressure and prevent the intrusion of the concrete liquid.
In addition, the mesh space said by this invention is an area of the rhombus comprised by the resin wire which cross | intersects, and is an area calculated by the rhombus area formula from the diagonal distance of space. The individual voids when covered with the fiber material are the above-mentioned space area, the area occupied by the spread fiber material existing in the space is removed, and the removed area is the same space. Is the area divided by the number of the same space divided by the fiber material present in. When the fiber material protrudes as a loop from the fiber bundle due to interlace or the like, the area is obtained by ignoring the loop or the like. In addition, each space | gap covered with the mesh space or the fiber material is easily calculated | required from the enlarged photograph of middle space.

  It is important for the fiber material to have a property of uniformly diffusing in the transverse direction of the fiber due to the pressure during braiding, which is important for covering the voids of the tubular mesh, and should be a non-twisted yarn or a low twisted yarn of 60 T / m or less. The non-twisted yarn that is interlaced and imparted with fiber entanglement is optimal because it is preferable because it is in a suitable range having the properties, and there is little yarn variation during handling and it spreads uniformly with pressure during braiding.

The thickness of the fiber material (decitex) is not particularly limited, but considering the main application of the present invention, it is a resin-made multifilament in which 1 to 200 dtex filaments are converged, and the thickness of the multifilament Is preferable in that a multifilament yarn having 4000 to 20000 dtex can suitably prevent the penetration of the concrete liquid. More preferably, it is a multifilament in which 30 to 2400 filaments of 5 to 20 dtex are converged, and the multifilament thickness is 6000 to 12000 dtex. And the surface voids of the tubular mesh are covered with such multifilament yarns, and preferably the individual voids are in the range of ² mm ² or less, more preferably 0.5 mm ² or less. Almost no concrete is allowed to pass through.

In the flexible tubular hollow conduit of the present invention, when producing a flexible tubular hollow conduit having an inner diameter of about 8 to 15 mm assuming the main use of the present invention, the number ratio of the resin wire and the fiber material (multifilament yarn) In the range of 1: 2 to 2: 1, 6 to 24 resin wires are preferable in view of the shape retention of the tube.
In the flexible tubular hollow water conduit of the present invention, the intersection between the resin wires, the intersection between the fiber materials, or the intersection between the resin wire and the fiber material may be fixed by an adhesive or resin. It may be fused and fixed by melting or softening the resin that constitutes the wire or fiber material. However, if the water pipe is bent, the cross section of the water pipe does not become flat. It is preferable that it can move freely at the intersection.

  Next, as an efficient manufacturing method for the flexible tubular hollow conduit of the present invention, two types of manufacturing methods can be considered.

  A method in which a resin wire is braided on a mandrel to form a tubular mesh structure, a fiber material is covered and braided on the surface layer, heat-fixed (shape set), and then the mandrel is extracted and molded.

  A bobbin wrapped with a resin wire and a bobbin wrapped with a fiber material are arbitrarily mixed (preferably alternately) and installed on a braiding machine, braided on a mandrel, heated and fixed (shape set), and then the mandrel is mounted. A method of extracting and molding.

  The above-mentioned two production methods are preferable because the process is shortened as compared with the conventional production method in which the surface of the spiral tube is covered with a fiber sheet. In particular, the latter of the above-mentioned two production methods is the former method. Compared to the above, it is the most preferable production method because the desired water conduit can be obtained directly in one step and the fiber space can be reliably covered with the mesh space formed by the resin wire.

In the latter method, when a flexible tubular hollow water guide tube having an inner diameter of about 8 to 15 mm assuming the main application of the present invention is manufactured, the preferred number of weights of the braiding machine is 20 to 36 weights, including resin The fiber weight is arranged in the middle of the resin wire weight so that the wire weight and the fiber weight are alternately arranged, the resin wire weight and the fiber weight are both equally spaced, and the fiber material enters the center between the resin wire weights. It is preferable.
And the tubular hollow water conduit obtained by the latter method is that the resin wire and the fiber material constitute the same braided hollow tube, compared with the case where the tube is formed separately and formed separately. This is preferable because the space can be reliably covered.
And in this invention, it is preferable that the crossing angle of a resin wire is braided in the range of 80-140 degree | times, More preferably, it is the range of 85-120 degree | times, More preferably, it is the range of 86-100 degree | times. When the crossing angle of the resin wires is less than 80 degrees, the form is weak against pressing, and conversely, when it exceeds 140 degrees, it is bulky and the productivity is deteriorated.

By alternately arranging the resin wire and the fiber material in this way, the size of the mesh space can be made uniform, and the penetration of the concrete liquid into the pipe can be more reliably prevented.
In addition, a plurality of fiber materials, preferably 2 to 3 weights, may be arranged for one resin wire, and in this case, the resin wires are arranged at equal intervals, and the fiber material is It is preferable that they are arranged at equal intervals between two adjacent resin wires.

  The flexible tubular hollow water conduit obtained by the present invention is such that a tubular mesh made of a resin wire is flexible and forms a hollow tube structure capable of withstanding concrete placing load, and the fiber material covering the mesh gap has a water permeability function. The surplus water (permeated water, etc.) generated when the placed concrete hardens is discharged to the outside, but the pre-hardening concrete is not allowed to pass through and is formed only from combustible resin wires and fiber materials. In concrete demolition and regeneration, it is useful because it can be easily separated by combustion decomposition.

  Furthermore, it can be widely used and useful for other purposes such as soil improvement and drying of moist powder while allowing the passage of liquid or gas while preventing the inflow of solid substances into the tube.

  Next, the present invention will be described more specifically with reference to examples.

Example 1
Using a 24 weight braiding machine, a 9000 dtex interlaced non-twisted recycled polyester formed from 12 recycled polyester monofilaments with a core diameter of 1.2 mm (circular cross section) and 900 filaments with a single filament thickness of 10 dtex. The multifilament weight is alternately arranged in the middle portion of the monofilament weight so that the multifilament enters the center portion of the monofilament, and the intersection angle is 90 ° with respect to the flexible mandrel made of fluororesin having an outer diameter of 10 mm. Braided at a degree, heated in a dryer at 160 ° C. for 20 minutes and fixed in shape, then the mandrel was removed, and the voids of the tubular mesh were covered with fibers (multifilament yarns entangled by interlacing), with an inner diameter of 10 mm Flexible tubular hollow conduit It was obtained. In this water conduit, the size of each gap formed by the fiber material covering the mesh space formed by the resin wire was 0.1 mm ² . Both the resin wire and the fiber material were not fixed at the intersections, and could move freely.

Comparative Example 1
Recycled polyester monofilament with a core diameter of 1.2 mm (circular cross section) is braided at a mating angle of 110 degrees with a 12 spindle brader and a fluororesin flexible mandrel with an outer diameter of 10 mm, and heated in a dryer at 160 ° C. for 20 minutes. Then, after the shape was fixed, the mandrel was pulled out to obtain a reticulated resin conduit having a tubular mesh structure with an inner diameter of 10 mm, in which the rhombus-shaped gap formed between the monofilaments was about 3 mm ² .

Comparative Example 2
Thickness 0.5 mm, a stainless steel tube having an inner diameter of 10mm, provided throughout the pores (voids 3.14 mm ²⁾ of diameter 2mm at a rate of 1cm square (100 mm ²⁾ per 16 months, the perforated hollow metal tube having an inner diameter of 10mm Obtained.

  Concrete inflow prevention stoppers are attached to both ends of each sample of Example 1, Comparative Example 1 and Comparative Example 2 and placed on the bottom of the mold 30 cm in length and 10 cm in depth. In addition, air bubbles were removed and the mixture was allowed to stand and harden to confirm the presence or absence of concrete flowing into the pipe.

While inflow of concrete could not be confirmed in Example 1, Comparative Example 1 resulted in about 40% of the volume in the pipe being buried, and Comparative Example 2 was about 60% buried, and Example 1 is useful. It was proved. The difference between Comparative Example 1 and Comparative Example 2 is considered to be derived from the fact that the opening ratio of Comparative Example 1 is about 36% and the opening ratio of Comparative Example 2 is about 50%.

It is a perspective view which shows one example of the flexible tubular hollow conduit tube obtained by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin wire 2 Fiber material 3 Intersection angle 4 Flexible tubular hollow conduit

Claims (7)

  A tubular hollow conduit having a structure in which a mesh space is covered with a fiber material in a hollow tube having a mesh structure surface in which resin wires intersect.   The resin wire is a resin monofilament having a diameter of 0.5 to 2.5 mm, while the fiber material is a resin multifilament in which 1 to 200 dtex filaments are bundled, and the multifilament thickness is 4000 to 20000 dtex. The tubular hollow conduit according to claim 1. The fiber material is a non-twisted yarn or a low twist yarn of 60 T / m or less, the mesh gap formed by the resin wire is covered with the fiber material, and the size of each gap formed as a result of the covering is 2 mm ² or less. The tubular hollow water conduit according to claim 1 or 2.   The flexible tubular hollow conduit according to any one of claims 1 to 3, wherein both the resin wire and the fiber material are made of a resin having no halogen element.   The tubular hollow conduit according to any one of claims 1 to 4, which is used by being embedded in concrete.   The resin wire and the fiber material wound around different bobbins are mixed in the same braiding machine, and the intervals between the adjacent resin wires are the same and attached so that at least one fiber material is inserted between the adjacent resin wires, A method for producing a tubular hollow conduit that is braided simultaneously.   A method for producing a tubular hollow water guide tube, in which a fiber material is braided on a hollow tube having a mesh structure surface in which resin wires intersect.

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