JP7287868B2 - Weed control sheet laying structure - Google Patents

Description

The present invention relates to a ground protection technology for preventing weeds on the ground such as slopes along roads and railroads, embankment slope road shoulders, etc., and in particular, while suppressing erosion of the exposed ground around the periphery of the weed control sheet. The present invention relates to a structure for laying a weed control sheet excellent in the effect of preventing curling of the periphery.

Generally, when a weed control sheet is laid on the ground, a plurality of fixing pins are driven into the peripheral edge of the weed control sheet spread on the ground such as a slope or a portion other than the peripheral edge to fix the sheet.
There are two known forms of use of the weed-control sheet: a form in which the weed-control sheet is covered with a granular protective layer such as gravel, and a form in which the weed-control sheet is used in an exposed state.
In the former mode of use, the problem of the weed control sheet curling up due to wind pressure is unlikely to occur, but in the latter mode of use, the wind enters from the gap between the periphery of the weed control sheet and the ground, and the periphery of the weed control sheet is damaged. The problem of rolling up has been pointed out.

As one of countermeasures against curling of the peripheral edge of the weed-control sheet, there is known a method of narrowing the installation interval of fixing pins driven along the peripheral edge of the weed-control sheet.
Patent Documents 1 and 2 disclose fixing a weed control sheet to the ground using a fixing pin having a special structure in which a large-diameter washer is provided on the pin head.
Patent Document 3 discloses that adhesive layers formed on the side edges of adjacent weed control sheets are superimposed and adhered, and a fixing pin is driven into the seam of the superimposed weed control sheets to fix them to the ground. It is
In Patent Document 4, after laying strip-shaped fixing sheets on the ground at intervals, a weed-control sheet is placed between the adjacent strip-shaped fixing sheets, and the back surface of the weed-control sheet and the strip-shaped sheet are attached by adhesion or welding. It is disclosed that the fixing sheets are integrally fixed.

JP 2016-77258 A JP 2019-76083 A JP-A-2004-33032 JP 2009-219446 A

Conventional anti-curling techniques for weed control sheets have the following problems.
<1> In the method of narrowing the installation interval of the fixing pins, not only does driving the fixing pins require a lot of labor and time, but the fixing pins only locally fix the weed control sheet. , the wind pressure concentrates on the fixing point of the weed-proof sheet, and the peripheral edge of the weed-proof sheet is easily torn.
<2> The fixing pins with special structures disclosed in Patent Documents 1 and 2 are not only expensive, but also the weed control sheet is limited to the range of the diameter of the washer. Easy to tear.
<3> Patent Literature 3 is a technology for preventing curling of the seams where adjacent weed-control sheets are superimposed, so it cannot be applied to the peripheral edge of the weed-control sheet.
<4> The technique of fixing the weed control sheet disclosed in Patent Document 4 requires a preliminary work to fix the belt-shaped fixing sheet folded in two by driving anchor pins to the ground, and furthermore, the back surface of the weed control sheet is fixed. Since it is necessary to apply an adhesive or heat-weld on site to fix the belt-shaped fixing sheets, it takes a lot of time and labor to lay the weed control sheet, resulting in a high laying cost.
<5> If there is exposed ground adjacent to the weed-preventing sheet, there is a risk that the periphery of the weed-preventing sheet will be erroneously cut when weeds growing on the exposed ground are cut. When the peripheral portion of the weed-control sheet is cut, the cut portion causes curling of the weed-control sheet.
<6> Conventional techniques for laying weed-proof sheets only take into account measures against weed-proof sheet rolling up due to wind, and do not consider measures against soil erosion (scouring) caused by rainfall.
For this reason, for example, when a weed control sheet is laid on the shoulder of a slope, if a large amount of rainwater that falls on the weed control sheet flows down along the weed control sheet, the exposed ground at the lower edge of the weed control sheet will become sediment. is eroded and grooves and cavities are formed in the erosion traces.
If the erosion of the exposed ground adjacent to the weed control sheet progresses, it not only causes slope collapse, but also causes the wind to enter the weed control sheet through the grooves and cavities of the erosion marks formed on the exposed ground, becomes easier to roll.

The present invention has been made in view of the above points, and its object is to suppress the erosion of the exposed ground around the periphery of the weed-control sheet and to prevent the curling of the periphery of the weed-control sheet. To provide a laying structure for a weed control sheet.

The present invention consists of a covered ground covered with a weed-control sheet, a peripheral ground adjacent to the peripheral edge of the weed-control sheet, and an exposed ground adjacent to the peripheral ground, and the peripheral edge of the weed-control sheet is fixed. A structure for laying a weed-control sheet that is secured via means, wherein the securing means is a belt that can be laid across the peripheral edge of the weed-control sheet and the peripheral ground adjacent to the peripheral edge of the weed-control sheet. It is composed of a resin-made fastening strip having a width and a function of attenuating the flow velocity of rainwater , and a plurality of fixing pins for fixing the fastening strap , and the fastening strap is arranged in a direction intersecting with the flowing direction of rainwater. a grid-like structure comprising a plurality of projections arranged in parallel toward the plurality of The projecting body of is protruded high with respect to the connecting body, and the fixing means is used to hold and fasten the peripheral edge of the weed-preventing sheet.
In another form of the invention, the fastening strap has embedded fibrous reinforcements uniaxially or biaxially oriented.
In another aspect of the present invention, a pressing plate is provided through which the fixing pin can be inserted, and the fixing pin is driven through the pressing plate.
In another aspect of the invention, the ground may be a sloped surface.

The present invention suppresses erosion of the exposed ground around the periphery of the weed-control sheet by holding and fixing the periphery of the weed-control sheet using a fastening band and a plurality of fixing pins. A weed control sheet laying structure that is excellent in preventing rolling up of the peripheral edge of the weed control sheet while suppressing erosion of the exposed ground around the peripheral edge of the weed control sheet and excellent in preventing rolling up of the peripheral edge of the weed control sheet. A sheet laying structure can be provided.
Furthermore, the peripheral portion of the weed control sheet can be fixed by using inexpensive commercially available fixing pins or pressing plates.

Perspective view of the construction of the weed control sheet with a part broken FIG. 11 is a partially enlarged view of a plurality of fastening straps having a plurality of protrusions; Explanatory drawing of fixing pin and pressure plate FIG. 11 is an explanatory diagram of the weed control sheet laying method, (A) is an explanatory diagram of the weed control sheet laying process, (B) is an explanatory diagram of the fastening strip laying process, and (C) is a weed control with a plurality of fixing pins. Explanatory drawing of the process of fixing the peripheral edge of the sheet Cross-sectional end view of VV in FIG. 4(C) FIG. 11 is an explanatory view of a comparative laying structure of the weed-control sheet in which a fastening band is laid without protruding from the weed-control sheet and fixed with a fixing pin, (A) is a plan view of the periphery of the weed-control sheet; (B) is a cross-sectional view of BB in (A)

The present invention will be described below with reference to the drawings.

<1> Weed-proof sheet Referring to FIG. 1, the weed-proof sheet 10 has a light-shielding property that suppresses the germination and growth of plants such as weeds, a water-blocking property, a fire-retardant property, and a strength that does not allow germinated plants to penetrate. It is a known strip-shaped sheet-like material.
As the material of the weed control sheet 10, for example, an elastomer material, a woven fabric, a nonwoven fabric, or the like can be used, and the cross-sectional structure thereof may be either a single layer structure or a multi-layer structure.

<2> Fixing Means for Peripheral Edge of Weed-Inhibiting Sheet The fixing means for preventing the peripheral edge of the weed-proof sheet 10 from curling up is to hold and fasten the peripheral edge of the weed-proof sheet 10 across the surface. It consists of a fastening band 20 laid along the peripheral edge of the weed control sheet 10 and a plurality of fixing pins 30.
In this example, a form in which the fastening means are attached to the lower side of the weed-proof sheet 10 will be described, but they may be attached to the upper side or the left and right sides of the weed-proof sheet 10 .

<2.1> Tether band The tether band 20 is made of resin having a width dimension that can be installed across the upper surface of the peripheral edge of the weed-preventing sheet 10 and the ground G adjacent to the peripheral edge of the weed-preventing sheet 10. is a strip of
The fastening band 20 has both the function of positioning the peripheral edge of the weed-proof sheet 10 at a fixed position and the function of damping the flow velocity of rainwater flowing down through the weed-proof sheet 10 .

The fastening strap 20 illustrated in FIG. 2 will be explained. The fastening strap 20 in (A) shows a structure of a mesh structure, and has a plurality of band-shaped projections arranged in parallel in a direction intersecting the flowing water direction. 21 and connecting bodies 22 crossing between adjacent protrusions 21 .
The fastening band 20 shown in FIG. 4B has a sheet 23 and a plurality of strip-like protrusions 21 arranged in parallel on one side of the sheet 23 in a direction intersecting the flowing water direction.
The fastening band 20 shown in FIG. 4(C) is provided with a sheet 23 and a plurality of strip-like protrusions 21 arranged intermittently on one side of the sheet 23 in a direction intersecting the flowing water direction. .
The fastening band 20 in FIG. 4D shows a form comprising a sheet 23 and a plurality of hemispherical or columnar protrusions 21 scattered on one side of the sheet 23 .
The fastening band 20 shown in (B) to (D) of the figure may have an opening in each sheet 23 to have a mesh structure.

These protrusions 21 are merely examples, and any structure that can decelerate the flow of rainwater may be used.
The interval and the number of protrusions 21 to be formed are appropriately selected in consideration of the slope of the ground and the like.
Further, the fastening band 20 may be constructed by burying a reinforcing material made of fibers uniaxially or biaxially in a part or the entire surface thereof.

<2.2> Fixing Pin The fixing pin 30 is a known fixing tool made of metal or plastic for fixing the fastening band 20 by hammering.
3A shows a U-shaped pin, and FIG. 3B shows an L-shaped pin.
The fixing pin 30 may be used alone, but if it is used in combination with a pressing plate 31 having a pin hole as shown in FIG. Weeds or the like can be prevented from growing through the pin holes driven into the sheet 10. - 特許庁
In this example, a configuration in which the U-shaped fixing pin 30 and the pressing plate 31 are used in combination will be described.
The type of the fixing pin 30 and the combination with the pressing plate 31 are selected in consideration of the hardness of the ground to be driven.

[Laying method of anti-grass sheet]
A method for laying the weed control sheet 10 will be described with reference to FIG.
In the explanation, the area covered with the weed-preventing sheet 10 is the covered ground G ₁ , the area covered with the fastening strip 20 is the peripheral ground G ₂ , and the area not covered with the weed-preventing sheet 10 and the fastening strap 20 is exposed. It is defined and explained as the ground _G3 .

<1> Spreading of weed control sheet Referring to FIG. 4A, the weed control sheet 10 is spread over the weed control range on the ground.

<2> Laying of Tether Strips Referring to _FIG. Place.
When laying the fastening band 20, the plurality of projecting bodies 21 are oriented in a direction intersecting the flowing water direction.

<3> Securing the peripheral edge of the weed-control sheet As shown in FIG. The fixing pins 30 are driven in, and a plurality of fixing pins 30 are driven into the lower half of the fastening band 20 covering the peripheral ground surface _G2 at predetermined intervals, so that the peripheral edge of the weed control sheet 10 is planarly fastened. do.
When fixing the peripheral part of the weed-proof sheet 10, the weed-proof sheet 10 and the fixing band 20 are fixed while being stretched so as not to cause slack.
Since the fastening band 20 has flexibility, the peripheral portion of the weed-proof sheet 10 can be laid to follow the undulations of the ground without gaps.

Fixing pins 30 are also driven into the portion other than the peripheral portion of the weed control sheet 10 at predetermined intervals to fix it to the covering ground _G1 (see FIG. 1).

[Characteristics of the installation structure of the weed control sheet]
The characteristics of the laying structure of the weed control sheet 10 will be described with reference to FIG.

<1> Antigrass action Due to the antigrass action such as the shading action of the antigrass sheet 10, germination and growth of weeds and the like are prevented on the covered ground G1 covered with the antigrass sheet _10. FIG.

If the peripheral portion of the weed control sheet 10 is fixed using the fastening band 20 in which a plurality of fiber reinforcing members are inserted in the longitudinal direction of the fastening band 20, the fiber reinforcing member is not included. In comparison, the slackness of the resin material due to exposure to the outdoors is suppressed and the dimensional stability of the fastening band 20 is improved, so that the adhesion of the peripheral portion of the weed control sheet 10 is improved.
Therefore, it becomes more difficult for a gap to form between the ground and the peripheral edge of the weed-proof sheet 10, and the effect of preventing the germination and growth of weeds through the gap in the peripheral edge of the weed-proof sheet 10 is enhanced.

<2> Effect of suppressing scouring of the ground by rainwater Rainwater falling on the weed-proof sheet 10 flows down along the weed-proof sheet 10 .
Since the covered ground _G1 is covered with the weed control sheet 10, it is not eroded by rainwater.

Rainwater flowing down along the weed-proof sheet 10 reaches the retaining band 20 attached to the peripheral edge of the weed-proof sheet 10.例文帳に追加
Rainwater that has reached the fastening band 20 is dammed by each projection 21 of the fastening band 20 as indicated by the arrows in FIG. flow down.
Since the plurality of protrusions 21 of the fastening band 20 act as water flow resistance in this manner, the flow rate of rainwater decreases in proportion to the downflow distance of the fastening band 20 .
The term "flow resistance" as used herein refers to a combination of the diffusion resistance along the longitudinal direction of the projections 21 and the overriding resistance of the projections 21 .

In this way, the decelerating action of rainwater is exerted over the entire width of the fastening strip 20, so that sediment on the peripheral ground surface _G2 adjacent to the peripheral edge of the grass-preventing sheet 10 and the exposed ground surface _G3 adjacent to the fastening strip 20 is reduced. Erosion can be effectively suppressed.

For example, if the fastening zone 20 has the mesh structure shown in FIG. 2(A), there is a risk that the earth and sand on the peripheral ground surface _G2 may flow out together with rainwater, but the raised protrusions 21 function as weirs for trapping soil particles. Therefore, the outflow of earth and sand from the peripheral ground surface _G2 can be effectively controlled.

As described above, the anchoring strip 20 widens the range of rainwater flow and gently reduces the flow speed, thereby suppressing erosion on the peripheral ground surface _G2 and the exposed ground surface _G3 at the peripheral edge of the weed control sheet 10. As a result, erosion grooves and cavities, which are erosion traces, are less likely to occur in the peripheral ground _G2 and the exposed ground _G3 .
Therefore, there is no concern that the peripheries of the weed control sheet 10 will be curled up due to the erosion grooves and cavities formed in the erosion traces.

<3> Effect of suppressing curling of weed-control sheet FIG. 6 shows a comparison laying structure of the weed-control sheet 10 in which the fastening band 20 is laid without protruding from the periphery of the weed-control sheet 10 and secured by the fixing pins 30. .
In this comparative laying structure, since the pressing width of the fastening band 20 that presses the peripheral edge of the weed-control sheet 10 is narrow, the curling suppressing force of the weed-control sheet 10 positioned between the adjacent fixing pins 30 is as shown in FIG. ) is smaller than the form shown in FIG.
Therefore, the peripheral portion of the weed-proof sheet 10 swells, and the inside of the weed-proof sheet 10 tends to catch the wind.
Moreover, in this contrasting laying structure, the wind pressure acting on the peripheral edge of the weed control sheet 10 must be supported only by the fixing pins 30 driven into the covered ground _G1 , so the installation interval of the fixing pins 30 is narrowed. There is a need.

In the present invention, in order to solve the problem of the contrasting _laying structure of the weed control sheet 10 shown in FIG. By driving fixing pins 30 into the covered ground _G1 and the peripheral ground _G2 to fix the fastening band 20, the peripheral edge part of the weed control sheet 10 is planarly pressed and fastened.
In the present invention, not only the upper half region of the strip-shaped fastening band 20 that presses the upper surface of the peripheral edge of the weed-proof sheet 10, but also the lower half region of the strip-shaped fastening strip 20 that covers the peripheral ground surface _G2 is prevented. It functions as a member for suppressing curling up of the peripheral portion of the grass sheet 10 .
Therefore, even if a large wind pressure acts on the peripheral edge of the weed-proof sheet 10, the fastening band 20 laid across the peripheral edge of the weed-proof sheet 10 and the peripheral ground _G2 disperses the wind pressure and supports it. , the curling up of the peripheral edge of the weed control sheet 10 can be effectively suppressed.

Furthermore, since the wind pressure acting on the periphery of the weed control sheet 10 is dispersedly supported by the covered ground surface _G1 and the peripheral ground surface _G2 via the plurality of fixing pins 30, the fixing pins for fixing the fastening band 20 It is possible to widen the installation interval of 30.

<4> Protective Effect of Weed Control Sheet by Tether Band If weeds grow on the peripheral ground _G2 or the exposed ground _G3 , it is necessary to mow the weeds with a mower.
Since the weed-proof sheet 10 covers and protects the peripheral surface of the grass-proof sheet 10 with the fastening band 20, only the weed-proof sheet 10 is not cut during mowing.
Even if part of the fastening band 20 is accidentally cut, the function of fastening the weed-proof sheet 10 by the fastening band 20 and the fixing pin 30 is not completely lost.

DESCRIPTION OF SYMBOLS 10...Weed control sheet 20...Fixed band 21...Projection 22...Connecting body 23...Sheet 30...Fixing pin 31...Pressing plate _G1 ... Covered ground _G2 ... Peripheral ground _G3 ... Exposed ground

Claims (4)

The ground consists of a covered ground covered with a weed control sheet, a peripheral ground adjacent to the peripheral edge of the weed control sheet, and an exposed ground adjacent to the peripheral ground, and the peripheral edge of the weed control sheet is secured via fastening means. A laying structure of a weed control sheet to be attached,
The fixing means has a band width that can be laid across the peripheral edge of the weed-proof sheet and the peripheral ground adjacent to the peripheral edge of the weed-proof sheet, and is made of resin having a function of attenuating the flow velocity of rainwater. and a harness of
and a plurality of fixing pins for fixing the fastening band ,
The fastening band has a plurality of protrusions arranged in parallel in a direction intersecting with the flowing direction of rainwater ;
A grid-like structure comprising a plurality of connecting bodies that are integrally formed with the projections and that cross between the adjacent projections,
The plurality of protrusions are raised with respect to the connecting body,
The fixing means is used to hold and fix the peripheral edge of the weed control sheet in a planar manner,
Laying structure of anti-grass sheet. 2. The weed control sheet laying structure according to claim 1, wherein a reinforcing member made of fiber is embedded in said fastening band in a uniaxial or biaxial direction . 2. The weed control sheet laying structure according to claim 1, further comprising a pressing plate through which the fixing pin can be inserted, and the fixing pin is driven through the pressing plate. The weed control sheet laying structure according to claim 1, wherein the ground is an inclined surface.

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