Weed-proof greening sheet

Abstract

To provide a weed-proof and greening sheet that is capable of realizing the growth of an objective species early while preventing the growth of a competing species, capable of lightening the maintenance and management that follow, and simultaneously, contributes to cost reduction by simplification of its structure.SOLUTION: A weed-proof and greening sheet S according to the present invention comprises a streaked base material bag 2 in a weed-proof sheet 1. The base material bag 2 is held so as to be exposed on the lower face side of the weed-proof sheet 1. A coarse part 5 having a low weed-proof function is provided at a holding position of the base material bag 2 in the weed-proof sheet 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a weed-control and greening sheet that can simultaneously control weeds and promote greening, for example, on slopes and the like. [Background technology]

[0002] As a conventional technique for simultaneously preventing weeds and greening, there is a method in which a so-called agricultural mulch film is laid on the ground, etc., and then holes are made in required places and seeds or seedlings are planted in the holes. With this method, the weed-suppressing effect of the mulch film is utilized to prevent weeds, while the target species of plants can grow in the holes. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-94000 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above method requires drilling holes in the mulch film on-site, and there is a concern that the large amount of work required on slopes and other work sites could lead to increased danger. In addition, because the mulch film is lightweight, there is also the problem that it can easily be blown away by the wind before it can be fixed in place.

[0005] As a technology that can solve the above problems, a greening method using a seeded weed-control sheet that integrates multiple components such as two sheets of nonwoven fabric, a poly sheet, a Russell net sheet, and a water-soluble seed sheet (for example, Patent Document 1) has been proposed; however, the structure of the seeded weed-control sheet is complex and tends to be high cost.

[0006] In addition, the applicant himself has proposed in Patent Application No. 2020-204947 (low-maintenance greening work, using mesh-like materials) a weed-control greening mat that can enable the growth of target species to be achieved early while hindering the growth of competing species, thereby reducing subsequent maintenance. However, the present invention seeks to provide a weed-control greening product that can achieve a similar effect with a simpler configuration, or a weed-control greening product specialized for stripe greening.

[0007] The present invention has been made with the above-mentioned matters in mind, and its object is to provide a weed-control greening sheet that enables the early growth of target species while hindering the growth of competing species, thereby reducing the need for subsequent maintenance, and at the same time contributes to reducing costs by simplifying the structure. [Means for solving the problem]

[0008] In order to achieve the above object, the weed-control greening sheet of the present invention is provided with a striped base material bag. The weed control sheet is woven into a sheet by combining warp threads and weft threads, and some of the warp threads are configured as a warp thread section for holding the base material bag, and the warp thread section for holding the base material bag is configured so that some of the warp threads are located below a sparse portion of the weed control sheet that has low weed control function, and are not entangled with the weft threads, but straddle the sparse portion. (Claim 1).

[0009] In the above-mentioned weed-control greening sheet, the base material bag may be held so as to be exposed on the lower surface side of the weed-control sheet (claim 2).

[0010] In the above weed-control greening sheet, a sparse portion with low weed-control function may be provided at a position in the weed-control sheet where the base material bag is held (claim 3).

[0011]

[0012]

[0013] In the above-mentioned weed-control greening sheet, the base material bag may be sandwiched between the sparse portion of the weed-control sheet and the base material bag holding warp thread portion (claim Section 4 ). Effect of the Invention

[0014] The present invention provides a weed-control greening sheet that enables the growth of target species to be achieved early while preventing the growth of competing species, thereby reducing the need for subsequent maintenance, and at the same time contributes to reducing costs by simplifying the structure.

[0015] That is, the weed-control greening sheet of the invention according to each claim of this application not only suppresses the germination and growth of competing species with the weed-control sheet, but also promotes the germination and growth of the target species by, for example, storing seeds and fertilizer of the target species in a substrate bag and making the substrate bag strong enough not to impede the germination or root growth of the target species. Furthermore, the weed-control greening sheet of the present invention can be constructed only from a weed-control sheet and a substrate bag, and costs can be reduced by simplifying the construction.

[0016] In the weed-control greening sheet of the invention according to claim 2, the base material bag exposed on the underside of the weed-control sheet can be brought into contact with the ground, etc., thereby ensuring the germination and growth of the seeds of the target species contained within the base material bag.

[0017] In the weed-control greening sheet of the invention according to claim 3, by sealing the sparse portions with substrate bags, the low weed-control function of the sparse portions can be compensated for by the substrate bags, and the low weed-control function of the sparse portions can be utilized to promote the germination and growth of seeds of the target species contained within the substrate bags.

[0018] Claim Item 1 In the weed-control greening sheet of the present invention, the substrate bag is held by some of the warp threads that make up the weed-control sheet (warp thread section for holding the substrate bag), and no other components are required to hold the substrate bag other than the weed-control sheet, thereby preventing increases in costs due to an increase in the number of components.

[0019] Claim Item 1 In the weed-control and greening sheet of the present invention, the warp thread parts for holding the base material bag are provided at positions corresponding to the sparse portions, so that it is easy to arrange the base material bag so as to cover the sparse portions.

[0020] Claim Section 4In the weed-control greening sheet of the present invention, the substrate bag can be held by the weed-control sheet by inserting the substrate bag between the sparse portion of the weed-control sheet and the warp thread portion for holding the substrate bag, and this holding operation can be easily performed. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1(A) is a perspective view of a weed-control and greening sheet according to an embodiment of the present invention, as viewed from above, and FIG. [Diagram 2] FIG. 2 is a plan view of the weed-control greening sheet. [Diagram 3] FIG. 2 is a bottom view of the weed control sheet. [Figure 4] 2, and (B) is an enlarged view of part B in FIG. [Diagram 5] 5(A) and (B) show a first modified example of the weed control sheet, and correspond to FIGS. 4(A) and (B), respectively. [Figure 6] FIG. 4 is a plan view showing a second modified example of the weed control sheet. [Figure 7] FIG. 11 is a plan view showing a third modified example of the weed control sheet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] An embodiment of the present invention will be described below.

[0023] The weed-control and greening sheet S shown in Figures 1(A) and (B) comprises a weed-control sheet 1 and multiple strip-shaped (long) base material bags 2 that can be attached and detached freely. The weed-control sheet S is used by unfolding it on the target construction area, such as a slope or flat land, where weed control and greening are to be achieved simultaneously, and then fixing (laying) it down with appropriate fixing devices (anchor pins, etc.).

[0024] As shown in Figures 2 and 3, the weed control sheet 1 has a rectangular shape when viewed from above and has a total of three pocket sections 3 spaced apart in its vertical (longitudinal) X direction, with each pocket section 3 extending in the horizontal (short) Y direction of the weed control sheet 1. Each pocket section 3 extends from one end side to the other end side in the Y direction of the weed control sheet 1, and a base material bag 2 can be freely inserted and removed from each pocket section 3 from either one end side or the other end side.

[0025] In such a weed-control greening sheet S, not only can the weed-control sheet 1 suppress the germination and growth of competing species, but the germination and growth of the target species can be promoted by, for example, storing the seeds and fertilizer of the target species in the substrate bag 2 and making the substrate bag 2 strong enough not to impede the germination or root growth of the target species (so that the sprouts and roots of the target species can easily break through it). Furthermore, the weed-control greening sheet S can be constructed only from the weed-control sheet 1 and the substrate bag 2, and costs can be reduced by simplifying the construction.

[0026] The substrate bag 2 is held by the weed-control sheet 1 so that at least its underside is exposed. In this example, the underside of the pocket portion 3 is composed of a number of band-shaped portions 4 (see FIG. 1(B)) spaced apart in the Y direction (longitudinal direction of the pocket portion 3), and portions of the underside of the substrate bag 2 inserted into the pocket portion 3 that are not in contact with the band-shaped portions 4 are exposed on the underside. In a weed-control greening sheet S configured in this manner, the substrate bag 2 exposed on the underside of the weed-control sheet 1 can be brought into contact with the natural ground, etc., ensuring the germination and growth of the seeds of the target species contained in the substrate bag 2.

[0027] Furthermore, sparse areas 5 with low weed-control function are provided in the weed-control sheet 1 at the holding position (pocket area 3) of the substrate bag 2. Here, the sparse areas 5 have one or more structures or properties, such as a lower density of constituent materials, lower strength, being thinner, or being more easily deformed by external forces, than the surrounding areas of the weed-control sheet 1 around the sparse areas 5, and are at least unlikely to hinder the germination and growth of the target species. In the weed-control and greening sheet S configured in this manner, by sealing the sparse areas 5 with the substrate bag 2, the substrate bag 2 can compensate for the low weed-control function of the sparse areas 5, and the low weed-control function of the sparse areas 5 can be utilized to promote the germination and growth of the target seeds contained in the substrate bag 2.

[0028] 2 to 4, the weed control sheet 1 of this example is constructed by combining warp threads 6 and weft threads 7 (see particularly Figs. 4(A) and (B)) and weaving them into a sheet (for ease of understanding, in Figs. 2 to 4, the warp threads 6 are shown in black and the weft threads 7 in grey), and a portion of the weed control sheet 1 where the warp threads 6 are present but the weft threads 7 are not present is provided as a sparse portion 5. Here, the sparse portion 5 is located above the pocket portion 3, and the width of the sparse portion 5 in the X direction is smaller than the width of the pocket portion 3 in the X direction, and on both sides of the sparse portion 5 in the pocket portion 3 in the X direction there are portions that are not the sparse portion 5 (normal portions whose weed control function is equivalent to the portions other than the sparse portion 5); in other words, the entire center in the X direction on the upper side of the pocket portion 3 is constituted by the sparse portion 5.

[0029] On the other hand, as shown in Fig. 4(B), some of the warp threads 6 are used as substrate bag holding warp thread parts 6a which constitute the belt-shaped part 4 that holds the substrate bag 2. In other words, the substrate bag holding warp thread part 6a is configured such that some of the warp threads 6 are positioned below the sparse part 5 of the weed control sheet 1, are not entangled with the weft threads 7, and straddle the sparse part 5 in the X direction. In the illustrated example, four substrate bag holding warp thread parts 6a which are successively arranged in the Y direction constitute one belt-shaped part 4, but three or less or five or more substrate bag holding warp thread parts 6a may constitute one belt-shaped part 4.

[0030] In this way, in the weed-control greening sheet S, in which the base material bag 2 is held by some of the warp threads 6 (warp thread portion 6a for holding base material bag) that constitute the weed-control sheet 1, no other materials are required to hold the base material bag 2 other than the weed-control sheet 1, so it is possible to prevent an increase in costs due to an increase in the number of materials. Also, since the warp thread portion 6a for holding base material bag is provided at a position corresponding to the sparse portion 5 (below the sparse portion 5), it becomes easy to arrange the base material bag 2 to cover the sparse portion 5.

[0031] Furthermore, as described above, in the weed-control greening sheet S of this example, the base material bag 2 can be freely inserted and removed from the pocket portion 3, that is, the base material bag 2 is sandwiched between the sparse portion 5 that constitutes the upper side of the pocket portion 3 and the base material bag holding warp portion 6a that constitutes the lower side. In this way, in the weed-control greening sheet S, which can hold the base material bag 2 in the weed-control sheet 1 by inserting the base material bag 2 between the sparse portion 5 and the base material bag holding warp portion 6a, the work of holding the base material bag 2 can be easily performed.

[0032] The specific configuration of the weed-control and greening sheet S will be described below.

[0033] If the entire outer surface (at least the upper surface) of the weed control sheet 1 (warp threads 6 and weft threads 7) is black or another dark color, the weed control sheet 1 will have excellent light-blocking properties, which is advantageous for suppressing the growth of buried soil species (weeds) when the weed control sheet 1 (weed-control greening sheet S) is laid on the ground, etc., and the weed control sheet 1 will be less susceptible to ultraviolet degradation and have excellent weather resistance. Furthermore, in particular, if the entire outer surface (at least the upper surface) of the weed control sheet 1 is black, which has good infrared absorption properties, the weed control sheet 1 will be more likely to heat up when sunlight is incident on it, and the heat will more likely kill buried soil species (weeds).

[0034] However, in the weed control sheet 1, the sparse portions 5 or the upper sides of the pocket portions 3 may be white rather than dark in color, so that they are less likely to become warm when exposed to sunlight.

[0035] The material of the weed control sheet 1 (warp threads 6 and weft threads 7) may be the same as the polyethylene used in so-called blue tarpaulins.

[0036] The warp threads 6 and weft threads 7 that make up the weed control sheet 1 may both be flat yarns having a width of about 3 mm, for example.

[0037] When a base material bag 2 with a diameter of 30 mm is fitted in the pocket portion 3, the width in the X direction of the sparse portion 5 (the width of the strip where no weft thread 7 exists) is about 40 to 50 mm, the width in the X direction of the warp thread portion 6a (strip portion 4) for holding the base material bag (i.e., the width in the X direction of the pocket portion 3) is about 80 mm, and the strip portions 4 are provided at a pitch of about 30 mm in the Y direction. Here, the portion of the warp thread 6 constituting the sparse portion 5 and the warp thread portion 6a for holding the base material bag are common in that they are not entangled (intertwined) with the weft thread 7, but the latter is longer in the X direction and has a larger pitch in the Y direction than the former, so that the degree of floating (ease of deformation) when the base material bag 2 is placed in the pocket portion 3 is relatively large.

[0038] The substrate bag 2 contains the target species of vegetative substrate (eg, seeds, bulbs, runners, etc.), as well as materials (substrates) suitable for the growth of the vegetative substrate, such as fertilizer, soil conditioner, water retaining material, etc.

[0039] When laying the weed-control greening sheet S having the above-mentioned configuration on the construction site, if the base material bags 2 are attached in advance to each pocket portion 3 of the weed-control sheet 1, the labor required for this attachment work on-site will be reduced, and such reduction in labor is advantageous in reducing danger, particularly when the site has a steep slope, etc. Also, although the weed-control sheet 1 is lightweight by itself, attaching at least one heavy base material bag 2 to the weed-control sheet 1 has the effect of making it less likely to be blown away by the wind when laying it down.

[0040] However, the present invention is not limited to this, and instead of previously attaching the substrate bag 2 to each of the pocket portions 3 of the weed control sheet 1, the substrate bag 2 may be attached to only some of the pocket portions 3, or the weed control sheet 1 may be transported to the site without any substrate bags 2 attached, and then the substrate bags 2 may be attached to the unattached pocket portions 3 at the site. From the viewpoint of making the weed control sheet 1 less likely to be blown away by the wind, it is preferable to previously attach at least one substrate bag 2 to the weed control sheet 1.

[0041] When the weed-control greening sheet S constructed as described above is laid on a slope, rainwater is supplied to the ground from the sparse portion 5 through the inside or outside of the base material bag 2 underneath, thereby overcoming the weakness of the weed-control sheet 1 that the back side of the weed-control sheet 1 dries out, weakening the slope (loosening the ground), and there is no need to perform work such as drilling holes to overcome this weakness.

[0042] Furthermore, when the weed-control greening sheet S is laid on a slope, the weed-control sheet 1 has a weakness in that the flow rate of rainwater flowing over the sheet 1 tends to increase, but this weakness can be overcome by the sparse section 5, which has the function of draining and dispersing rainwater from the top of the waterproof sheet 1 to the bottom side (the natural ground side).

[0043] In addition, the deterioration of the landscape when the weed-control greening sheet S is laid in the construction area can be reduced by stripe-like greening achieved by the germination and growth of the target seeds from the substrate bags 2 arranged along the sparse areas 5 extending in stripes. Moreover, the weed-control greening sheet S prevents competing plants (mainly weeds) from growing thickly, thereby reducing the effort and management costs of weeding and preventing injuries due to weeding. In addition, by appropriately separating the pocket portions 3 (sparse portions 5) or substrate bags 2 in the X direction and locating each pocket portion 3 (sparse portions 5, substrate bags 2) in a position spaced away from both ends of the weed-control sheet 1 in the X direction to perform stripe-shaped greening, the target plants growing in each substrate bag 2 are less likely to have their sunlight blocked or compressed by surrounding competing plants, and also less likely to have their sunlight blocked by plants of the target species growing in other substrate bags 2 adjacent in the X direction, it becomes easy to create an extremely suitable growth environment for the target plants, which also contributes to early greening.

[0044] Furthermore, when laying the weed-control greening sheet S on a slope, if the longitudinal direction (Y direction) of the sparse portions 5 (substrate bag 2, pocket portion 3) is arranged so as to follow the contour lines, the thick substrate bag 2 will block the soil washed away from the mountain side and form a berm, which may make it easier for flying plants to settle on the berm due to the so-called berm effect. However, as described above, when the substrate bag 2 is placed in the pocket portion 3, the portion of the warp threads 6 that constitutes the sparse portions 5 (the upper side of the pocket portion 3) and the warp thread portion 6a for holding the substrate bag (the lower side of the pocket portion 3) are compared, the latter will float (ease of deformation) more than the former. In other words, the upper side of the pocket portion 3 is less likely to deform than the lower side. As a result, deformation of the weed-control sheet 1 due to the thickness of the substrate bag 2 will be more noticeable on the lower surface and less noticeable on the upper surface. As a result, the above-mentioned berm will not be formed, which will more easily hinder the settlement and growth of flying plants and make it easier for target species to grow.

[0045] In addition, in the sparse portion 5 provided at the location corresponding to the base material bag 2, there are warp threads 6 extending in the X direction but no weft threads 7 extending in the Y direction, so that the runoff soil is less likely to get caught in the sparse portion 5 and is more likely to flow down over the sparse portion 5. In other words, the formation of small steps is also suppressed by the sparse portion 5.

[0046] It is to be noted that the present invention is not limited to the above-described embodiment, and can be modified in various ways without departing from the spirit and scope of the present invention. For example, the following modifications can be mentioned.

[0047] 1(A) and (B), three pockets 3 are provided in one weed control sheet 1, but the number of pockets 3 can be changed as desired. Furthermore, the number of base material bags 2 housed in each pocket 3 is not limited to one, and may be two or more.

[0048] In the examples of Figures 1(B) and 4(B), the belt-like portion 4 is formed by a warp thread portion 6a for retaining the substrate bag, which is part of the warp thread 6, but this is not limited to this. For example, the belt-like portion 4 may be formed by attaching a rib-like member separate from the weed control sheet 1 to the underside of the weed control sheet 1.

[0049] In the example of Figures 4(A) and (B), a part of the weed control sheet 1 has a portion where warp threads 6 are present but weft threads 7 are not present, forming a sparse portion 5; however, this is not limited to the above and the sparse portion 5 may be formed, for example, by making cuts in parts of the weed control sheet 1 or by removing parts of it.

[0050] The warp threads 6 constituting the sparse portion 5 shown in Figures 4(A) and (B) are not entangled with the weft threads 7, and therefore tend to flutter about, which may be an obstacle when inserting the base material bag 2 into the pocket portion 3. In order to suppress the movement of the warp threads 6 constituting the sparse portion 5, a thin thread 8 that extends in the Y direction and is entangled with the warp threads 6 constituting the sparse portion 5 and is narrower than the weft thread 7 may be woven in, as shown in Figures 5(A) and (B). In this illustrated example, a total of four thin monofilament threads 8 are provided at intervals of about 10 mm in the X direction, and for example, a thread with a thickness of about 440 decitex (400 denier; the material may be the same polyethylene as the warp threads 6 and weft threads 7) may be used as the thin threads 8.

[0051] In the example of Figures 3 and 4(B), the sparse portion 5 and the pocket portion 3 (warp portion 6a for holding substrate bag, strip portion 4) are arranged so that their centers in the X direction are approximately aligned. In this case, however, when laying the weed-control greening sheet S on a slope, if the longitudinal direction (Y direction) of the sparse portion 5 (substrate bag 2, pocket portion 3) is arranged along the contour lines, the substrate bag 2 will be held by gravity in a position biased toward the toe of the slope within the pocket portion 3 (warp portion 6a for holding substrate bag, strip portion 4), and there is a possibility that part of the sparse portion 5 (the part on the toe of the slope) will not be covered by the substrate bag 2.

[0052] Therefore, if this possibility is a concern, for example, as shown in Figure 6, the sparse portion 5 can be appropriately biased to one side in the X direction (downward in the illustrated example) relative to the pocket portion 3 (warp portion 6a for holding the base material bag, band portion 4) so ​​that when the base material bag 2 is held by gravity in a position biased toward the toe of the weave within the pocket portion 3 (warp portion 6a for holding the base material bag, band portion 4) as described above, it will be blocked by the base material bag 2.

[0053] Alternatively, as shown in Figure 7, for example, band-shaped portions 4 that are appropriately biased to one side in the X direction (downward in the illustrated example) relative to the sparse portion 5 and band-shaped portions 4 that are appropriately biased to the other side (upward in the illustrated example) may be alternately arranged at intervals in the Y direction, so that the base material bag 2 is held within the pocket portion 3 with almost no bias in the X direction.

[0054] Needless to say, the modified examples given in this specification may be combined as appropriate. [Explanation of symbols]

[0055] 1. Weed control sheet 2 Base material bag 3 Pocket section 4. Belt 5 Sparse section 6 Warp threads 6a Base material bag holding warp thread part 7 Weft 8 Fine Thread S Weed-proof greening sheet

Claims

1. The weed control sheet is equipped with a striped base material bag, The weed control sheet is woven into a sheet by combining warp threads and weft threads, and a part of the warp threads is configured as a base material bag holding warp thread part that holds the base material bag, The warp thread section for holding the substrate bag is configured so that a portion of the warp thread is positioned below a sparse portion of the weed-control sheet that has low weed-control function, and is configured to straddle the sparse portion without being entangled with the weft thread.

2. 2. The weed-control and greening sheet according to claim 1, wherein the base material bag is held so as to be exposed on the lower surface side of the weed-control sheet.

3. 3. The weed-control and greening sheet according to claim 1, wherein a sparse portion having a low weed-control function is provided at a position in the weed-control sheet where the base material bag is held.

4. A weed-control greening sheet described in any one of claims 1 to 3, wherein the substrate bag is sandwiched between the sparse portion of the weed-control sheet and a warp portion for holding the substrate bag.

Images