JP2016172943A - Concrete block mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete block mat which is laid on a soil surface prepared by leveling of the ground in revetment construction or the like, and which is excellent in strength and excellent in form stability so as to hardly cause mesh displacement and so as to be capable of preventing sediment outflow and breakage.SOLUTION: A concrete block mat is formed by: forming a collective stitch row 6 in which stitch rows 2 each formed by using two adjacent knitting yarns 2a, 2b are drawn close to each other by a knitted structure; in the collective stitch row 6, warp-inserting a reinforcing fiber yarn 3 comprising reinforcing fibers and weft-inserting weft insertion yarns 4 at prescribed intervals to constitute a mat body 1 having the knitted structure; forming a through hole 5 in a region surrounded by the collective stitch rows 6, 6 adjacent at a prescribed interval and the weft insertion yarns 4, 4; distributing the reinforcing fiber yarn 3 into yarn bundles 3a, 3b; between the yarn bundles 3a, 3b, interposing either one of the knitting yarns 2a, 2b constituting the stitch row 2 in a state of tension; and using the knitting yarns 2a, 2b to fasten the yarn bundles 3a, 3b of the reinforcing fiber yarn 3 and the weft insertion yarns 4.SELECTED DRAWING: Figure 1

Description

  The present invention is an improvement of civil engineering materials. More specifically, it is laid on the soil surface prepared by revetment work, etc., has excellent strength, has good shape stability, and is not prone to misalignment. The present invention relates to a concrete block mat that can prevent damage.

  As a recent revetment protection method for preventing erosion, a concrete block is placed in parallel on a mat (sheet) such as a fabric and bonded, and then laid down on the soil surface to be protected while suspending the mat with the mat. Has been developed.

  Conventionally, various proposals have been made regarding mats used in the construction method. For example, a mesh woven fabric having a thickness of 1 mm or less and defining strength and voids is disclosed for the purpose of suppressing mechanical strength and outflow of earth and sand. (See Patent Document 1). This sheet material has a woven fabric structure in which warp and weft are interlaced, and is configured by roughly arranging warps or wefts to provide a predetermined gap.

  However, in such a mesh structure, since the binding force between the weaving yarns is weak, the meshes are easily misaligned, and a large load or tensile force is applied to the mat when placing a heavy concrete block or hanging the mat together. For this reason, unless handled carefully, there is a problem that the size of the gap changes and the function of preventing sediment outflow becomes unstable.

  In addition, a mesh sheet for civil engineering / architecture using warp knitting technology aimed at arranging warp fiber concentrating rows between chain knitting rows and supporting them with weft insertion yarns, and arranging warp converging rows in a straight line has been proposed. (See Patent Document 2), and the warp fiber bundles are not interlaced with other yarns, so they can be arranged straight to exhibit high strength characteristics.

  However, since the reinforcing fibers of the warp bundles are only sandwiched between the two weft insertion yarns between the chain braids, it is easy to move freely when a heavy concrete block is placed or the whole sheet is suspended. The fixed-size mesh holes cannot be maintained, which may also cause sediment discharge.

JP 2007-169836 A Japanese Patent Laid-Open No. 06-101143

  The present invention was made in view of the above-mentioned problems in the conventional concrete block mat, the purpose of which is laid on the soil surface that has been leveled by revetment work, An object of the present invention is to provide a concrete block mat that is excellent in strength, has good form stability, hardly causes misalignment, and can prevent sediment runoff and breakage.

  Means employed by the present inventor for solving the above technical problem will be described with reference to the accompanying drawings.

That is, the present invention is a mat on which a concrete block can be placed to suspend the support portions 7 formed at both ends of the mat body 1,
While the stitch row 2 formed by two adjacent knitting yarns 2a and 2b forms a collective stitch row 6 that is close to each other by the knitting structure, the reinforcing fiber yarn 3 made of reinforcing fibers is inserted through the collective stitch row 6, And the weft insertion thread 4 is inserted into the weft at predetermined intervals to form the mat body 1 of the knitted structure,
While forming a through hole 5 in a region surrounded by the set stitch rows 6 and 6 and the weft insertion yarns 4 and 4 adjacent at a predetermined interval,
The reinforcing fiber yarn 3 is distributed to the yarn bundles 3a and 3b, respectively, and either one of the knitting yarns 2a and 2b constituting the stitch row 2 is interposed in tension between the yarn bundles 3a and 3b. The concrete block mat was completed by adopting the technical means of fastening the yarn bundles 3a and 3b of the reinforcing fiber yarn 3 and the weft insertion yarn 4 with these knitting yarns 2a and 2b.

  In addition, in order to solve the above-mentioned problems, the present invention adds a reinforcing fiber yarn 3 through a single stitch and, in addition to the above means, if necessary, and inserts at least a four-needle weft insertion yarn 4 in a predetermined manner. It is also possible to adopt a technical means for forming the mat body 1 having a knitted structure by inserting it at intervals.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a double denby in which warp knitting structures of the knitting yarns 2a and 2b constituting the aggregate stitch row 6 are introduced by 1 in 1 out in addition to the above means as necessary. Technical means of organizing can also be adopted.

Furthermore, in order to solve the above-mentioned problems, the present invention provides a double denby in which warp knitting structures of the knitting yarns 2a and 2b constituting the aggregate stitch row 6 are introduced by 1 in 1 out in addition to the above means as necessary. Change the organization of
The knitting yarn 2a constituting one set stitch row 6 is knitted with the adjacent knitting yarn 2b on the opposite side every predetermined number of courses to form another set stitch row 6, and a boundary line between both set stitch rows In addition, it is possible to adopt a technical means for forming a grid-like trace line by a tracer yarn inserted every predetermined number of wales.

  Furthermore, in order to solve the above-mentioned problems, the present invention further includes technical means for additionally inserting a weft insertion yarn 4 that is folded back only at both ends over the entire width of the knitting width of the mat body 1 in addition to the above means as necessary. Can also be adopted.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a reinforcing fiber yarn 3 and a weft insertion yarn 4 in addition to the above-mentioned means as necessary, in which polyester fiber, polyamide fiber, polyolefin fiber, vinylon fiber, aramid fiber, It is also possible to adopt a technical means of producing with one or plural kinds of reinforcing fibers selected from carbon fiber and glass fiber.

  Furthermore, in order to solve the above-described problems, the present invention provides a product of the fineness D (dtex) of the reinforcing fiber yarns of the reinforcing fiber yarn 3 and the arrangement density W (lines / inch) in addition to the above means as necessary. It is also possible to adopt a technical means of setting the range of 30000 to 45000.

Furthermore, in order to solve the above-mentioned problems, the present invention makes the shape of the through hole 5 substantially rectangular and, in addition to the above means, the unit area of this through hole 5 is 1 to 4 mm ² . It is also possible to adopt the technical means of doing.

  In the present invention, a mat is placed on which a concrete block can be placed to support the support portions formed at both ends of the mat body, and the stitch rows of two adjacent knitting yarns close to each other by the knitting structure. While forming the set stitch row, in this set stitch row, a reinforcing fiber yarn made of reinforcing fibers is inserted through, and weft insert yarns are inserted at predetermined intervals to form a mat body of knitting structure. A through hole is formed in a region surrounded by the set stitch rows and the weft insertion yarns adjacent to each other at a predetermined interval, while the reinforcing fiber yarns are respectively distributed to yarn bundles, and the stitch rows are arranged between these yarn bundles. By interposing any one of the knitting yarns in a tension state, the yarn bundle of the reinforcing fiber yarn and the weft insertion yarn can be tightened by these knitting yarns.

  As described above, the block mat of the present invention skillfully utilizes the elastic restoring force due to the rigidity of the reinforcing fiber yarns, and the two stitch rows are attracted so that the warp insertion yarns and the weft insertion yarns that are inserted by warp are inserted. Is integrated in the state of being wrapped in two stitch rows, so that the warped insertion yarns and warp insertion yarns are not easily displaced or pulled out, and are very easy to handle. Even if this warp knitting machine is used, it is possible to form a concrete block mat that is excellent in strength, has good form stability, and hardly causes misalignment.

  Therefore, the mat of the present invention can be efficiently constructed even when the crane is suspended by a crane without causing the mat to which the concrete block is bonded to be deformed or damaged.

  In addition, since the position of the aggregate stitch row is regulated by the weft insertion thread, the mesh hole is not deformed by external force, even if a heavy concrete block is placed or the work that suspends the mat is performed, It is possible to exert a certain effect of preventing sediment loss.

  In addition, when necessary, when a concrete block is affixed by using a trace line in the width direction due to a change in the knitting structure and a grid-like trace line by a warp insertion tracer yarn on the sheet surface as necessary. Since it can be used as a positioning line or a mat cutting line, and the concrete block affixing work can be performed accurately and efficiently, the practical use value as a concrete block mat is very high.

It is a whole perspective view showing the use condition of the block mat of a 1st embodiment of the present invention. It is a schematic diagram showing the structure of the block mat of 1st Embodiment of this invention. It is a whole front view showing the block mat of 1st Embodiment of this invention. It is a knitting | organization organization chart of the block mat of 1st Embodiment of this invention. It is a schematic diagram showing the knitted fabric structure of the warp knitting yarn of the block mat of 2nd Embodiment of this invention. It is a whole front view showing the block mat of 2nd Embodiment of this invention. It is the knitting | organization organization chart of the block mat of 2nd Embodiment of this invention.

  The mode for carrying out the present invention will be described in more detail with reference to the drawings specifically shown as follows.

“First Embodiment”
A first embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a mat body, and what is indicated by reference numeral 2 is a stitch row composed of two adjacent knitting yarns 2a and 2b.

  Moreover, what is indicated by reference numeral 3 is a reinforcing fiber thread, and what is indicated by reference numeral 4 is a weft insertion thread. Furthermore, what is indicated by reference numeral 5 is a through hole, and what is indicated by reference numeral 6 is a set stitch row in which the stitch rows 2 are gathered. Reference numerals 7 indicate support portions formed at both ends of the mat body 1.

  As shown in FIG. 1, the block mat of the present invention extends the mat body 1 in the longitudinal direction to support support portions 7 formed at both ends of the mat body 1, and a concrete block is formed on the mat. Is mounted and bonded to the soil surface to be protected while suspending the mat together with a crane or a forklift to prevent erosion and protect the revetment.

  In configuring this block mat, first, a set stitch row 6 is formed in which the stitch rows 2 of two adjacent knitting yarns 2a and 2b are close to each other by the knitting structure. For this knitting, for example, an 18 gauge Russell knitting machine made by KARL MAYER can be used.

  Next, a mat body 1 having a knitted structure is configured by inserting the reinforcing fiber yarns 3 made of reinforcing fibers and inserting the weft insertion yarns 4 at predetermined intervals in the aggregate stitch row 6. The support portions 7 at both ends can be appropriately subjected to fraying prevention processing and anti-slip processing.

  In the present embodiment, the warp knitting structure of the knitting yarns 2a and 2b constituting the aggregate stitch row 6 can be a double denby structure guided by 1 in 1 out (alternately one).

  FIG. 2 is a schematic diagram showing the knitted fabric structure of the mat body 1 of the concrete block mat according to this embodiment. The knitting yarn 2a and the knitting yarn 2b, which are warps, are respectively inserted into separate warp guides in 1in1out, and the knitting yarn 2a and the knitting yarn 2b are integrated by a denby structure (1/1 tricot knitting) opposite to each other. Thus, a set stitch row 6 is configured.

  In this embodiment, the reinforcing fiber yarns 3 are inserted into each set stitch row 6 after one stitch, and at least four stitches of weft insertion yarn 4 are inserted at predetermined intervals.

  In FIG. 2, two weft insertion yarns 4 are shown. Actually, however, the weft insertion yarns 4 are arranged in 1 in 1 out so that there is a folded portion in each set stitch row 6, and at least 4 Repeatedly swinging the needle.

  In FIG. 2, the weft insertion thread 4 is shown to be folded back for each course. However, when the course density is high, the distance in the course direction of the weft insertion thread 4 is reduced, and a through hole having a required size is obtained. In practice, it is preferable to turn back every 2 or 3 courses.

  In this embodiment, the number of laterally swinging needles of the weft insertion yarn 4 is related to the number of overlapping weft insertion yarns 4 connecting the set stitch rows 6 and 6, which is half the number of laterally swinging needles. In addition, when the horizontal swing is 4 stitches or less, the number of weft insertion yarns 4 connecting between the set stitch rows 6 and 6 is reduced to 2 or less, so that a large fineness is required to bear the strength in the width direction of the mat. The weft insertion thread 4 is required.

  However, if the weft insertion thread 4 is thick, there is a problem that it is difficult to knit because of high rigidity. Therefore, it is better to increase the number of yarns with four fine stitches and to increase the number of thin yarns, ensuring sufficient width direction strength. It is possible to improve the knitting property, and at the same time, the stitch row is not distorted, which is preferable in terms of quality.

  Then, a through hole 5 is formed in a region surrounded by the set stitch rows 6 and 6 and the weft insertion yarns 4 and 4 adjacent to each other at a predetermined interval.

In the present embodiment, it is preferable that the shape of the through hole 5 is substantially rectangular and the unit area per one is 1 to 4 mm ² . Is time consuming for a problem to discharge the rain water contained in soil too small in 1 mm ² or less, whereas, because thus simultaneously sediment also drained and rainwater too large a 4 mm ² or more.

The interval between the aggregate stitch rows 6 and 6 is determined by the needle interval of the knitting machine and the fineness of the knitting yarn 2a, the knitting yarn 2b and the reinforcing fiber yarn 3, and the interval between the weft insertion yarns 4 and 4 is determined by the coarse density. What is necessary is just to adjust suitably so that it may be set to 1-4 mm < ² > which is a preferable size of the through-hole 5, depending on how the weft insertion yarn 4 is folded at the stitch row.

  Then, the reinforcing fiber yarn 3 is distributed to the yarn bundles 3a and 3b, respectively, and either one of the knitting yarns 2a and 2b constituting the stitch row 2 is interposed between the yarn bundles 3a and 3b in a tension state. To do.

  At this time, the warp-inserted reinforcing fiber yarns 3 are alternately inserted from the left and right of the set stitch row 6 so that they are once wavyly zigzag immediately after knitting. Since a material having a fineness several times thicker than 2b is used, the rigidity of the reinforcing fiber yarn 3 is superior to that of the knitting yarn, and the elastic fiber yarn 3 tends to be restored to a substantially linear shape by elasticity.

  By skillfully utilizing such elastic restoring action due to the rigidity of the reinforcing fibers, one of the knitting yarns 2a and 2b constituting the stitch row 2 interposed between the yarn bundles 3a and 3b (knitting yarn in the drawing). 2a) will be pulled and tense.

  In this way, when the knitting yarn 2a between the yarn bundles 3a and 3b of the reinforcing fiber yarn 3 is tensioned, the knitting yarn 2b is pressed to press the knitting yarn 2b, so that the knitting yarn 2b is also tensioned. Since it is wound around the bundles 3a and 3b and wrapped around the outer peripheral surface, the bundle 3a and 3b of the reinforcing fiber yarn 3 and the weft insertion yarn 4 can be tightened, so that an external force acts on the mat body 1. Even so, the reinforcing fiber yarn 3 does not come off easily.

  Further, since the two stitch rows forming the collective stitch row 6 are attracted to each other through the reinforcing fiber yarns 3, the gaps are formed between the collective stitch rows 6 and 6, and the reinforcing fiber yarns 3 are particularly thick. Even with a fine yarn, a sufficient gap can be provided with certainty.

  Moreover, in this embodiment, if necessary, a high-strength weft insertion thread 4 that can be folded back only at both ends over the entire width of the knitting width of the sheet body 1 can be additionally inserted to obtain a mat that does not easily stretch in the weft direction. Can do.

  The concrete block mat according to the present invention is used as a mat for placing a concrete block at a construction site. Therefore, the support blocks 7 and 7 at both ends in the longitudinal direction of the mat to which the concrete block is attached are gripped by a crane. It is necessary to have a strength that does not cause damage when lifted and laid. Usually, the tensile strength in the longitudinal direction of the mat is set to 50 kN / m or more. For that purpose, the reinforcing fiber yarn 3 and the weft insertion yarn 4 (especially the reinforcing fiber yarn 3 which is a warp) are made of polyester fiber, polyamide fiber, polyolefin fiber, vinylon fiber, aramid fiber, carbon fiber, glass fiber which are high strength fibers. It is preferable to produce by 1 type or multiple types chosen from these, and it is preferable that it is a polyester fiber especially when considering the surface of cost or a knitting property.

  In addition, in order to secure a mat tensile strength of 50 kN / m or more, the product of the fineness D (dtex) and the arrangement density W (lines / inch) of the warped insertion reinforcing fiber yarn 3 is in the range of 30000 to 45000. preferable. When the product of the fineness D (dtex) and the arrangement density W (lines / inch) of the reinforcing fiber yarn 3 inserted through warp is 30000 or less, the mat cannot bear the weight when suspended with the concrete block attached. There is a problem that only the lightweight concrete block can be dealt with. On the other hand, the product of the fineness D (dtex) and the arrangement density W (lines / inch) of the warped insertion reinforcing fiber yarn 3 is not more than 45000. This is because it has strength and wastes material costs.

  Thus, the block mat of this embodiment as shown in FIG. 3 is completed. Further, the knitting structure of the block mat of the present embodiment is as shown in FIG. 4, L1 is an ear thread for preventing fraying of the mat end, L2 and L3 are knitting yarns 2a and 2b, L4 is a reinforcing fiber yarn 3, L5 indicates the weft insertion thread 4.

“Second Embodiment”
Next, a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the warp knitting structure of the knitting yarns 2a and 2b constituting the aggregate stitch row 6 is changed to a double denby change structure guided by 1 in 1 out, and the knitting yarn 2a constituting one aggregate stitch row 6 is provided. Tracer yarn formed by knitting with the knitting yarn 2b adjacent on the opposite side for each predetermined number of courses to form another set stitch row 6 and the boundary line between both set stitch rows and every predetermined number of wales A grid-like trace line is formed by (unusual colored yarn).

  FIG. 5 shows only the knitted fabric with the knitting yarns 2a and 2b in the block mat of this embodiment. In the set stitch row A, the knitting yarns 2a and 2b are integrated in a denby structure opposite to each other and 8 courses are integrated, and then in the set stitch row B, the knitting yarns 2a and 2b are respectively located on the opposite sides. The yarns 2a and 2b are integrated.

  At this time, the width at which the boundary between the set stitch rows A and B can be visually recognized by switching the set stitch rows by the knitting yarns 2a and 2b to the knitting yarns 2a and 2b positioned on the opposite side for each predetermined number of courses. Directional lines can be formed (see FIG. 6).

  Although not shown in the drawing, warp direction marks are formed by inserting the knitting yarns 2a, 2b and the warp insertion reinforcing fiber yarn 3 together with the reinforcing fiber yarn 3 for each predetermined number of wales. Then, it is possible to form a lattice-like trace line that matches the position where the concrete blocks are bonded together by the boundary line (the weft direction mark) between the set stitch row A and B. This trace line can also be obtained by setting one of the knitting yarns 2a and 2b to a different color tracer yarn for each predetermined number of wales.

  By doing so, it is possible to apply the concrete block more efficiently and at the same time to apply the concrete block accurately, and it is also possible to accurately cut the mat block in line with the line.

  In this way, the block mat of the present embodiment as shown in FIG. 6 is completed. The knitting structure diagram of the block mat of this embodiment is as shown in FIG. 7, L1 is an ear thread for preventing fraying of the mat end, L2 and L3 are knitting yarns 2a and 2b, L4 is a reinforcing fiber yarn 3, and L5 is A weft insertion thread 4 is shown.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “Claims”. The number and material of the yarn 3 and the weft insertion yarn 4 can be changed as appropriate and belong to the technical scope of the present invention.

  Moreover, although the mat of the present invention has been described as being used for a concrete block mat, the present application is not limited, and it can be suitably used as a sheet material that is used throughout civil engineering and construction. .

DESCRIPTION OF SYMBOLS 1 Mat | matte body 2 Knitting row 2a, 2b Knitting yarn 3 Reinforcement fiber yarn 3a, 3b Yarn bundle 4 Weft insertion yarn 5 Through hole 6 Collective stitch row 7 Support part

Claims (8)

A mat on which a concrete block is placed and which can suspend support parts (7) formed at both ends of the mat body (1),
While the stitch row (2) formed by two adjacent knitting yarns (2a, 2b) is brought close to each other by the knitting structure, a collective stitch row (6) is formed. The mat body (1) of the knitted structure is configured by inserting the fiber yarn (3) and inserting the weft insertion yarn (4) at predetermined intervals.
While a through hole (5) is formed in a region surrounded by the set stitch row (6, 6) and the weft insertion yarn (4, 4) adjacent to each other at a predetermined interval,
The reinforcing fiber yarn (3) is distributed to each of the yarn bundles (3a, 3b), and any one of the knitting yarns (2a, 2b) constituting the stitch row 2 between the yarn bundles (3a, 3b). One is interposed in a tension state, and the yarn bundle (3a, 3b) of the reinforcing fiber yarn (3) and the weft insertion yarn (4) are tightened by these knitting yarns (2a, 2b). Concrete block mat.   The mat body (1) of the knitted structure is configured by inserting the reinforcing fiber yarn (3) through one stitch and inserting at least four stitches of weft insertion yarn (4) at predetermined intervals. The concrete block mat according to claim 1.   The concrete block mat according to claim 1 or 2, wherein the warp knitting structure of the knitting yarns (2a, 2b) constituting the set stitch row (6) is a double denby structure guided by 1 in 1 out. The warp knitting structure of the knitting yarns (2a, 2b) constituting the aggregate stitch row (6) is a double denby changing structure guided by 1 in 1 out,
The knitting yarn (2a) constituting one set stitch row (6) is knitted with the adjacent knitting yarn (2b) on the opposite side for each predetermined number of courses to form another set stitch row (6), 4. The concrete block mat according to claim 3, wherein a lattice-like trace line is formed by a boundary line between both set stitch rows and a tracer yarn inserted every predetermined number of wales.   The concrete block mat according to any one of claims 1 to 4, further comprising a weft insertion thread (4) that is folded back only at both ends over the entire width of the knitting width of the mat body (1).   The reinforcing fiber yarn (3) and the weft insertion yarn (4) are made of one or more kinds of reinforcing fibers selected from polyester fiber, polyamide fiber, polyolefin fiber, vinylon fiber, aramid fiber, carbon fiber and glass fiber. The concrete block mat according to any one of claims 1 to 5, wherein the concrete block mat is formed.   The product of the fineness D (dtex) and the arrangement density W (lines / inch) of the reinforcing fiber yarn of the reinforcing fiber yarn (3) is in the range of 30000-45000. Concrete block mat described in one. The shape of the through-hole (5) is substantially rectangular, and the unit area of this through-hole (5) is 1-4 mm < ² >, The concrete as described in any one of Claims 1-7 characterized by the above-mentioned. Block mat.