JP2008163689A - Herbicidal structure and herbicidal method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a herbicidal structure for cutting off the supply of water to kill weeds. <P>SOLUTION: The herbicidal structure 2 is provided for preventing the growth of weeds 1 from a gap 5 extending from the outside to the lower side between a first face 3a of a walkway-roadway boundary block 301 and a second face 4a of a road structural part 401, opposing each other. The herbicidal structure 2 has a hollow portion 6 at a position lower than an entrance 5a of the gap 5 where the gap 5 is connected therewith, no water resides and roots 1a of the weeds 1 are guided thereto. When the roots 1a of the weeds 1 elongating through the gap 5 to the lower side reach the hollow portion 6, the roots 1a have contact with air and the supply of water to the roots 1a is cut off. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a weed control structure and a weed control method that prevent the growth of weeds at a portion where the structures contact each other.

  There is a slight gap between the parts where the structures are in contact, such as the part where the pedestrian boundary block or drainage ditch and the road pavement layer are in contact, or the part where the guardrail support and the foundation structure supporting the support are in contact. In this gap, dust accumulates. And when the seeds of plants such as weeds fly there, if the germination conditions such as the temperature suitable for germination and the supply of moisture due to rainfall are arranged, the plant will germinate and extend the root through the gap, Eventually, it reaches the crushed stone layer, roots and settles and grows.

  Therefore, conventionally, for example, there has been a weed prevention structure that prevents weeds from growing in a portion where the walking road boundary block and the road pavement layer are in contact (for example, Patent Document 1). In this grass prevention structure, as shown in FIG. 11, the pedestrian road boundary block 11 was provided with a notch 11a at the upper end corner on the sidewalk side. And the asphalt layer of the sidewalk was laid so that it might overlap with the notch 11a. That is, in this weed prevention structure, the notch 11a makes it difficult to open between the pedestrian road boundary block 11 and the asphalt layer, and prevents the generation of weed from the joint.

Japanese Patent Laid-Open No. 10-82012

  However, even if the notch 11a is provided in the pedestrian boundary block 11 as in the conventional weed prevention structure, the pedestrian boundary block 11 and the road pavement surface layer 12 cannot be brought into close contact with each other, and both contact each other. There was a gap in the part. For this reason, the weeds could extend the roots downward beyond the notch 11a from the gap, and the effectiveness of the weed prevention was not sufficient.

  The present invention has been made in order to solve the above-described conventional drawbacks, and an object thereof is to provide a herbicidal structure and a herbicidal method that can cut off the supply of moisture and kill weeds. There is.

In order to achieve the object, the weed control structure and the weed control method according to the present invention have the following configurations. That is,
According to a first aspect of the present invention, the first structure and the second structure that are arranged so as to be in contact with each other, the first surface and the second surface facing each other, from the outside to the lower side. A weedproof structure that prevents weed growth from extending gaps. In this weed control structure, the gap passes through a position lower than the entrance of the gap so that the root of the weed extending downward through the gap is brought into contact with air and the supply of moisture to the root is cut off. A hollow portion is provided in which water does not stay and the root is guided.

  According to this weed control structure, in the first structure and the second structure, the weeds germinated near the entrance in the gap between the first surface and the second surface have their roots extending downward through the gap. When the extended weed root reaches the hollow part and comes into contact with air, the supply of moisture to the root is cut off.

  According to a second aspect of the present invention, there is provided a weedproof structure according to the first aspect of the present invention, wherein the second structure is formed by disposing and solidifying an indeterminate structure forming material. Is done. And the auxiliary member which is embed | buried without exposing to the said structure formation material and follows the said 1st surface is provided. Therefore, the hollow portion is provided between the auxiliary member and the first structure.

  According to a third aspect of the present invention, there is provided the weedproof structure according to the second aspect, wherein the auxiliary member is inclined so that a distance from the first surface increases toward an upper end portion. Having an inclined surface. Thus, by providing the inclined surface at the upper end portion of the auxiliary member, the roots of weeds extending downward can be reliably guided to the hollow portion.

  According to a fourth aspect of the present invention, there is provided the weedproof structure according to the second or third aspect, wherein the auxiliary member has a surface close to the first surface above the hollow portion. A proximity surface. Thus, by providing the proximity surface on the auxiliary member, it is possible to prevent the structure forming material from entering the hollow portion when the structure forming material is disposed.

  According to a fifth aspect of the present invention, there is provided the weedproof structure according to any one of the second to fourth aspects, wherein the hollow portion is covered with the first surface on the auxiliary member. Are formed so as to extend laterally along the auxiliary member.

  The grass protection structure according to the invention of claim 6 is the grass protection structure according to any one of claims 2 to 4, wherein the hollow portion is covered with the auxiliary member on the first surface. Are formed so as to extend laterally along the first surface.

  According to a seventh aspect of the present invention, there is provided the grass protection structure according to any one of the second to fourth aspects, wherein the auxiliary member and the first surface are opposed to each other. Thus, a hollow portion forming groove for forming the hollow portion is provided so as to extend laterally along the auxiliary member and the first surface.

  According to an eighth aspect of the present invention, in the weedproof structure according to the sixth or seventh aspect, the auxiliary member is disposed adjacent to the upper surface of the hollow portion forming groove on the first surface. The upper projecting piece extends to the middle position in the depth direction of the hollow portion forming groove. As a result, the roots of the weeds are guided to the intermediate position of the hollow portion forming groove through the gap between the upper surface of the hollow portion forming groove provided on the first surface and the upper protruding piece. For this reason, the supply of moisture to the root in the hollow portion is effectively cut off.

  According to a ninth aspect of the present invention, in the weedproof structure according to any one of the sixth to eighth aspects, the auxiliary member is a lower surface of the hollow portion forming groove on the first surface. And a lower projecting piece extending to the inner surface of the hollow portion forming groove. Thereby, at the time of construction, the auxiliary member is positioned at a predetermined position by the lower protruding piece. And the pressure of the structure formation material arrange | positioned can be received with this lower protrusion piece.

  Moreover, the weed prevention structure which concerns on invention of Claim 10 is the weed prevention structure of any one of Claim 2 thru | or 9, The said 2nd structure is arrange | positioned on a base layer, The auxiliary member is disposed so as to be placed on the foundation layer. Thereby, in the case of construction, this auxiliary member is positioned at a predetermined height position by placing the auxiliary member on the foundation layer.

  The grass protection structure according to claim 11 is the grass protection structure according to any one of claims 2 to 10, wherein the first structure is a concrete secondary product embedded in a road surface. The second structure includes a road component.

  The grass protection structure according to the invention described in claim 12 is the grass protection structure according to claim 1, wherein one surface of the first surface and the second surface is covered with the other surface. Thus, a hollow portion forming groove that forms the hollow portion is provided so as to extend laterally along the one surface.

  According to a thirteenth aspect of the present invention, there is provided the weedproof structure according to the first aspect, wherein the hollow portion is disposed so as to be opposed to each other on the first surface and the second surface. Is formed so as to extend laterally along the first surface and the second surface.

  According to a fourteenth aspect of the present invention, in the weedproof structure according to the twelfth or thirteenth aspect, the first structure includes a support, and the second structure includes the support. It consists of columnar objects supported by the body.

  According to a fifteenth aspect of the present invention, there is provided a herbicidal method according to the first aspect of the present invention, wherein the first structure and the second structure disposed so as to be in contact with each other are exposed from the outside of the first surface and the second surface facing each other. A method of preventing weeds that prevents weeds from growing from the gaps extending to the side. In this weed control method, a hollow portion through which the root of the weeds is introduced, in which the gap passes and water does not stay, is provided at a position lower than the entrance of the gap, and the hollow portion is guided downward through the gap. By inducing the roots that extend and bringing the roots into contact with air, the supply of moisture to the roots is cut off.

  According to the grass prevention structure and the grass prevention method according to the present invention, by providing a hollow portion where the gap passes at a position below the entrance of the gap, the root is brought into contact with air in the hollow portion, and the supply of moisture is cut off. Can weed the weeds.

  The best mode for carrying out the weedproof structure and the weedproof method according to the present invention will be described below with reference to the drawings.

  1 and 2 show a first embodiment of the present invention. Reference numeral 1 in the figure denotes weeds. 2 is a herbicidal structure. The weed prevention structure 2 includes a first surface 3a and a second surface 4a that are opposed to each other in the first structure 3 and the second structure 4 that are arranged so as to be in contact with each other in a lateral relationship (horizontal direction). The growth of the weeds 1 from the gap 5 extending downward from the outside is prevented.

  Here, in the weed prevention structure 2, the root 1 a of the weed 1 extending downward through the gap 5 is brought into contact with air and the supply of moisture to the root 1 a is cut off from the inlet 5 a of the gap 5. A hollow portion 6 through which the root 1a is guided is provided at the position where the gap 5 passes and water does not stay. Specifically, the hollow portion 6 extends laterally along the first surface 3a or the second surface 4a. Moreover, this hollow part 6 is for cutting off the supply of moisture to the root 1a to such an extent that weeds 1 will die, and the size of the hollow part 6 for that purpose is the height and width of the longitudinal section. Although it is desirable that (depth) is 2 to 3 cm or more, it is not limited to this value.

  In the 1st structure 3 and the 2nd structure 4, after the 1st structure 3 is arranged, the 2nd structure 4 is formed by arranging and solidifying an indefinite structure forming material. . The weed prevention structure 2 is provided with an auxiliary member 7 that is embedded in the structure forming material (that is, the second structure 4) without being exposed and along the first surface 3a of the first structure 3. It is done. Therefore, the hollow portion 6 is provided between the auxiliary member 7 and the first structure 3. Further, the auxiliary member 7 has an inclined surface 7a that is inclined so that the distance from the first surface 3a increases toward the upper end portion at the upper end portion. Furthermore, the auxiliary member 7 has a first proximity surface 7b as a proximity surface facing the first surface 3a above the hollow portion 6. In addition, the auxiliary member 7 has a second proximity surface 7 c that faces the first surface 3 a below the hollow portion 6. The auxiliary member 7 has a hollow portion forming groove 7d that is covered with the first surface 3a to form the hollow portion 6, more specifically, a vertically-divided circular arc shape with a lower inner surface serving as a downward inclined surface P1 (details) Is provided with a hollow portion forming groove 7 d that is curved in a semicircular arc shape so as to extend laterally along the auxiliary member 7.

  Specifically, the first structure 3 includes a concrete block (that is, a concrete block) as a concrete secondary product embedded in a road surface, in particular, a walking road boundary block 301. The second structure 4 includes a road configuration unit 401. In the illustrated embodiment, the road component 401 as the second structure 4 includes, for example, a base layer 401a using, for example, concrete (more specifically, ready-mixed concrete) or an asphalt mixture as an irregular structure forming material. And a road pavement surface layer 401b using concrete (specifically, ready-mixed concrete), an asphalt mixture, or the like, which is also an irregularly shaped structure forming material, on the base layer 401a.

  The auxiliary member 7 is made of synthetic resin or metal. Further, the auxiliary member 7 has a shape or a structure that does not allow the root 1a to pass through in order to effectively guide the root 1a of the weed 1 to the hollow portion 6, and has a plate shape in the illustrated embodiment. . The auxiliary member 7 includes a curved hollow portion forming piece 7e including the hollow portion forming groove 7d, a first proximity piece 7f extending upward from the hollow portion forming piece 7e, and a downward direction from the hollow portion forming piece 7e. The second proximity piece 7g extends and the inclined piece 7h is bent from the first proximity piece 7f and extends obliquely upward. Here, the first proximity piece 7f includes the first proximity surface 7b, and the second proximity piece 7g includes the second proximity surface 7c. The inclined piece 7h includes the inclined surface 7a. The auxiliary member 7 is embedded across the road pavement surface layer 401b and the base layer 401a, and is fixed to the first surface 3a with, for example, an adhesive. At this time, the adhesive is spotted on the first proximity surface 7b and / or the second proximity surface 7c so that the space between the first proximity surface 7b and the second proximity surface 7c and the first surface 3a is vacant. To be partially painted.

  Here, the weed control method for preventing the growth of the weeds 1 from the gap 5 uses the weed control structure 2, and extends downward into the hollow portion 6 through the gap 5. By inducing the root 1a of the weed 1 and bringing the root 1a into contact with air, the supply of moisture to the root 1a is cut off.

  Next, the effect of the weed prevention structure 2 and the weed prevention method which consist of the above structure is demonstrated. The weeds 1 germinated in the vicinity of the entrance 5a in the gap 5 between the first surface 3a and the second surface 4a in the walking road boundary block 301 (first structure 3) and the road component 401 (second structure 4) The root 1 a extends downward through the gap 5. When the root 1a of the extended weed 1 passes between the first proximity surface 7b and the first surface 3a, reaches the hollow portion 6 and comes into contact with air, the supply of moisture to the root 1a is cut off. In this way, the hollow portion 6 through which the gap 5 passes is provided at a position below the inlet 5a of the gap 5, and the root 1a is brought into contact with air in the hollow portion 6 to cut off the supply of moisture, whereby the weeds 1 are killed. Can be made. Moreover, the growth of the weeds 1 can be efficiently prevented by killing the weeds 1 in this way.

  In addition, by providing the inclined surface 7 a (inclined piece 7 h) at the upper end portion of the auxiliary member 7, the root 1 a of the weed 1 extending downward from the inlet 5 a side of the gap 5 can be reliably guided to the hollow portion 6. it can. Further, by providing the auxiliary member 7 with the first proximity surface 7b (first proximity piece 7f) or the second proximity surface 7c (second proximity piece 7g), the structure forming material in the second structure 4, that is, concrete or the like. When the asphalt mixture is disposed, the structure forming material can be prevented from entering the hollow portion 6. In addition, when water such as rain enters the hollow portion 6, the water slides down the downward inclined surface P1 of the hollow portion forming groove 7d and moves between the second proximity surface 7c and the first surface 3a. The water does not stay in the hollow portion 6 because it passes through and goes down.

  In addition, unlike the case where the hollow portion forming groove 3b is formed in the walking road boundary block 301, which will be described later, a general walking road boundary block can be used as it is as the walking road boundary block 301, and the existing walking road boundary block can be used as an existing walking road boundary block. Can also be applied without grooving.

  FIG. 3 shows a second embodiment of the present invention. This embodiment is different from the first embodiment in the portion where the hollow portion forming groove for forming the hollow portion 6 in the grass prevention structure 2 is provided, but the other portions are substantially the same. Parts having functions are denoted by the same reference numerals, and different parts will be mainly described.

  With respect to the hollow portion 6, a hollow portion forming groove 3 b that is covered with the auxiliary member 7 and forms the hollow portion 6 is provided on the first surface 3 a so as to extend laterally along the first surface 3 a. And the lower surface of this hollow part formation groove | channel 3b becomes the downward inclined surface P2. The auxiliary member 7 includes a cover piece 7i covering the hollow portion forming groove 3b, a first proximity piece 7f extending upward from the cover piece 7i, a second proximity piece 7g extending downward from the cover piece 7i, and a first proximity piece It consists of an inclined piece 7h that is bent from 7f and extends obliquely upward. Here, the covering piece 7i, the first proximity piece 7f, and the second proximity piece 7g are straightly connected and have a flat plate shape as a whole. As in the first embodiment, the first proximity piece 7f is a first proximity surface as a proximity surface facing the first surface 3a of the walking road boundary block 301 above the hollow portion 6. 7b. The second proximity piece 7g includes a second proximity surface 7c facing the first surface 3a below the hollow portion 6. The inclined piece 7h includes an inclined surface 7a that is inclined so that the distance from the first surface 3a increases toward the upper side.

  The herbicidal method and the effects of the herbicidal structure 2 and the herbicidal method in the second embodiment are the same as those in the first embodiment.

  FIG. 4 shows a third embodiment of the present invention. This embodiment is different from the first embodiment in the configuration of the hollow portion 6 in the weed prevention structure 2, but the others are substantially the same. Different parts are mainly described with reference numerals.

  With respect to the hollow portion 6, the auxiliary member 7 and the first surface 3a are provided with hollow portion forming grooves 7d and 3b that form the hollow portion 6 so as to be opposed to each other on the auxiliary member 7 and the first surface 3a. It is provided to extend laterally along. That is, not only the hollow portion forming groove 7d is provided in the auxiliary member 7, but also the first surface 3a is provided with the hollow portion forming groove 3b, and the hollow portion 6 is formed by these hollow portion forming grooves 7d and 3b. .

  The herbicidal method in the third embodiment is the same as in the first embodiment. Moreover, although the effect of the weed control structure 2 and the weed control method in this 3rd embodiment is the same as that of 1st embodiment, it has the effect shown below further.

  That is, since the hollow part 6 is formed by the hollow part forming grooves 7d and 3b of both the auxiliary member 7 and the first surface 3a, the hollow part 6 can be widened. Furthermore, the exit from the gap 5 is located in the middle of the hollow portion 6, so that the water supply to the root 1 a in the hollow portion 6 can be effectively cut off, and the weed 1 can be more reliably Can be killed.

  5, 6 and 7 show the fourth, fifth and sixth embodiments of the present invention, respectively. These fourth, fifth, and sixth embodiments correspond to the first, second, and third embodiments, respectively, but the shape of the auxiliary member 7 is different from those embodiments. Although different, the others are substantially the same. In the following, parts having similar functions are denoted by the same reference numerals, and different parts will be mainly described.

  The road component 401 as the second structure 4 includes, for example, a road pavement layer (surface layer and base layer) using concrete (specifically, ready-mixed concrete) or an asphalt mixture as an amorphous structure forming material. . And this road structure part 401 (2nd structure 4) is arrange | positioned on the foundation layer 8 (roadbed). The foundation layer 8 is formed using crushed stone, for example. The auxiliary member 7 is arranged so as to be placed on the base layer 8. In the illustrated embodiment, the auxiliary member 7 has a lower end protruding piece 7j extending in a direction away from the first surface 3a at the lower end, and the lower end protruding piece 7j abuts on the base layer 8, The auxiliary member 7 is placed on the base layer 8.

  Further, in the fifth embodiment (FIG. 6) and the sixth embodiment (FIG. 7), the auxiliary member 7 is adjacent to the upper surface 3c of the hollow portion forming groove 3b of the first surface 3a and is hollow. It has the upper protrusion piece 7k extended to the intermediate position of the depth direction of the part formation groove | channel 3b. Further, the auxiliary member 7 has a lower protruding piece 7m that contacts the lower surface 3d of the hollow portion forming groove 3b of the first surface 3a and extends to the inner surface 3e of the hollow portion forming groove 3b.

  The herbicidal methods in these fourth to sixth embodiments are the same as those in the first embodiment. Moreover, although the effect of the weed control structure 2 and the weed control method in these 4th-6th embodiment is the same as that of 1st embodiment, it has the effect shown below further. Yes.

  That is, in the fourth to sixth embodiments, the auxiliary member 7 is placed on the foundation layer 8 during construction. For this reason, the auxiliary member 7 is positioned at a predetermined height position, and the auxiliary member 7 can be easily deployed.

  Further, in the fifth embodiment (FIG. 6) and the sixth embodiment (FIG. 7), the root 1a of the weed 1 has an upper surface 3c of the hollow portion forming groove 3b provided in the first surface 3a. Through the gap 5 with the upper protruding piece 7k, it is guided to the middle position of the hollow portion forming groove 3b. For this reason, the supply of moisture to the root 1a in the hollow portion 6 is effectively cut off. Further, during construction, the auxiliary member 7 is positioned at a predetermined position by the lower protruding piece 7m, and the auxiliary member 7 can be easily deployed. Further, in the illustrated embodiment, since the upper protruding piece 7k is provided in addition to the lower protruding piece 7m, the protruding pieces 7m and 7k are adjusted to the height of the hollow portion forming groove 3b at the time of construction. As a result, the workability can be improved and the accuracy can be stabilized. Further, the pressure of the structure forming material such as the concrete (specifically, ready-mixed concrete) or the asphalt mixture to be disposed can be received by the lower protruding piece 7m, and the deformation of the auxiliary member 7 can be suppressed. When water such as rain enters the hollow portion 6, the water is between the lower protruding piece 7m and the lower surface 3d of the hollow portion forming groove 3b, and between the second proximity surface 7c and the first surface 3a. The water does not stay in the hollow portion 6. In addition, if the lower surface 3d of the hollow portion forming groove 3b is formed on a downward inclined surface, the retention of water is further eliminated.

  FIG. 8 shows a seventh embodiment of the present invention. This embodiment is greatly different from the first embodiment in that the auxiliary member 7 is not provided. In the following, parts having similar functions are denoted by the same reference numerals and different parts. Is mainly explained.

  The first structure 3 is composed of a support 302, and the second structure 4 is composed of a columnar object 402 supported by the support 302. Then, one surface (the first surface 3a in the illustrated embodiment) of the first surface 3a of the support 302 and the second surface 4a of the columnar object 402 is disposed on the other surface (in the illustrated embodiment, The hollow portion forming groove (in the illustrated embodiment, the hollow portion forming groove 3b) that is covered with the second surface 4a) is formed on one surface (in the illustrated embodiment, the first surface). It is provided so as to extend laterally along one surface 3a).

  Specifically, the support 302 as the first structure 3 is made of, for example, a concrete block (that is, a concrete block) as a concrete secondary product embedded in the road surface or placed on the road surface. The support 302 is provided with a support hole 3f extending in the vertical direction. And the said hollow part formation groove | channel 3b is formed over the perimeter surface (namely, 1st surface 3a) of the support hole 3f (the lower surface of the hollow part formation groove | channel 3b becomes a downward inclined surface). Preferably). The columnar object 402 includes, for example, a support such as a guard rail or a sign. Therefore, the columnar object 402 is inserted into the support hole 3f of the support 302 and supported. At this time, the outer peripheral surface of the columnar object 402 in the support hole 3f becomes the second surface 4a.

  The herbicidal method in the seventh embodiment is the same as that in the first embodiment.

  Below, the effect of the weed control structure 2 and the weed control method in this 7th embodiment is shown. The weeds 1 germinated in the vicinity of the entrance 5a in the gap 5 between the first surface 3a and the second surface 4a in the support 302 (first structure 3) and the columnar object 402 (second structure 4) are roots thereof. 1 a extends downward through the gap 5. When the root 1a of the extended weed 1 reaches the hollow portion 6 and comes into contact with air, the supply of moisture to the root 1a is cut off. In this way, the hollow portion 6 through which the gap 5 passes is provided at a position below the inlet 5a of the gap 5, and the root 1a is brought into contact with air in the hollow portion 6 to cut off the supply of moisture, whereby the weeds 1 are killed. Can be made. Moreover, the growth of the weeds 1 can be efficiently prevented by killing the weeds 1 in this way.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, in the first to sixth embodiments (FIGS. 1 to 7), the first structure 3 includes the pedestrian road boundary block 301, but other concrete secondary such as other boundary blocks and gutter blocks. It may be made of a product, or may not be precast but may be cast on site. Furthermore, the first structure 3 may not be made of concrete but may be made of other materials, or may be made of two or more kinds of materials.

  Moreover, in 1st-6th embodiment (FIGS. 1-7), although the auxiliary member 7 is provided with the inclined piece 7h provided with the inclined surface 7a, this inclined piece 7h does not need to be provided. . Further, the auxiliary member 7 is provided with a first proximity surface 7b (first proximity piece 7f) or a second proximity surface 7c (second proximity piece 7g), and these proximity surfaces 7b and 7c (proximity piece 7f). , 7g) may be absent. Further, in these embodiments, the auxiliary member 7 has a plate shape, but may have a shape other than this plate shape. Moreover, although the auxiliary member 7 has a shape or a structure that does not allow the root 1a of the weed 1 to pass through, the auxiliary member 7 preferably has a shape or a structure that does not pass water. The auxiliary member 7 is fixed to the first surface 3a by an adhesive, but may be fixed by other methods such as an anchor bolt.

  In the first to sixth embodiments, the weed prevention structure 2 has been described using a main paved road. However, a simple paved road, that is, a base layer is not provided, and the surface layer is directly on the roadbed. You may use for the road which is arrange | positioned, and may be used not only for a roadway but for a sidewalk. Further, an irregular structure forming material other than concrete or asphalt mixture, for example, crushed stone (specifically, aggregate of crushed stone) may be used as a material for forming the lower layer portion of the road component 401.

  In the fourth to sixth embodiments (FIGS. 5 to 7), the auxiliary member 7 is provided with the lower end protruding piece 7j. However, the lower end protruding piece 7j may not be provided.

  In the fifth and sixth embodiments (FIGS. 6 and 7), the auxiliary member 7 is provided with an upper protruding piece 7k and a lower protruding piece 7m. Either one or both of the protruding pieces 7m may be eliminated. On the contrary, you may provide the upper protrusion piece 7k and the lower protrusion piece 7m suitably in the auxiliary member 7 in 2nd, 3rd embodiment.

  Further, in the seventh embodiment (FIG. 8), the hollow portion forming groove 3b for forming the hollow portion 6 is provided on the first surface 3a. On the contrary, the hollow portion is formed on the second surface 4a. A groove may be provided. Further, the hollow portion forming groove that forms the hollow portion 6 so as to be opposed to each other on the first surface 3a and the second surface 4a extends laterally along the first surface 3a and the second surface 4a. May be provided. According to this structure, since the hollow part 6 is formed of the hollow part formation groove | channel of both the 1st surface 3a and the 2nd surface 4a, the hollow part 6 can be enlarged. Moreover, the exit from the gap 5 is located in the middle of the hollow portion 6, so that the water supply to the root 1 a in the hollow portion 6 can be effectively cut off, and the weed 1 can be more reliably removed. Can be killed.

  In the seventh embodiment (FIG. 8), the support 302 as the first structure 3 is made of a concrete block, but may be another concrete secondary product. 302 may not be made of precast but may be placed on site. Furthermore, the support body 302 may not be made of concrete but may be made of other materials, or may be made of two or more kinds of materials. Further, the first structure 3 and the second structure 4 are not formed of the support body 302 and the columnar object 402, but are hollow on one surface of the first surface 3a and the second surface 4a and covered with the other surface. Any part forming groove may be used as long as the first surface 3a and the second surface 4a are provided with hollow part forming grooves that are opposed to each other.

  Further, as shown in FIGS. 9 and 10, in the grass prevention structure 2 using the auxiliary member 7, the hollow portion 6 is secured below the protruding portion 3g of the U-shaped side groove 303 with the upper end portion protruding horizontally. Alternatively, the auxiliary member 7 may be disposed along the first surface 3a. That is, the 1st structure 3 is the U-shaped side groove | channel 303 which consists of concrete secondary products, for example, and the 2nd structure 4 becomes the road structure part 401. FIG. The hollow portion 6 extends laterally along the first surface 3a of the U-shaped groove 303 or the auxiliary member 7 below the protruding portion 3g and between the auxiliary member 7 and the U-shaped groove 303. Provided.

  In the example shown in FIG. 9, the road component 401 as the second structure 4 is composed of a road pavement layer (for example, composed of a surface layer and a base layer), and is disposed on the foundation layer 8 (for example, a roadbed). Is done. The auxiliary member 7 is arranged so as to be placed on the base layer 8. The auxiliary member 7 has a plate shape and includes an inclined piece 7h, a first proximity piece 7f (proximity piece), and a cover piece 7i. Here, the first proximity piece 7f and the covering piece 7i are straightly connected and have a flat plate shape as a whole.

  In the example shown in FIG. 10, the road component 401 as the second structure 4 includes, for example, a roadbed 401c and a road pavement layer 401d on the roadbed 401c. The auxiliary member 7 has a plate shape and includes an inclined piece 7h, a first proximity piece 7f (proximity piece), and a cover piece 7i. Here, the cover piece 7i extends straight downward from the first proximity piece 7f, and bends in the middle until it extends close to the U-shaped groove 303.

  In the example shown in FIGS. 9 and 10, the auxiliary member 7 provided with the hollow portion forming piece 7e or the lower end protruding piece 7j shown in FIG. 1, FIG. 4 or FIG. 5 may be used.

It is a principal part schematic diagram of 1st embodiment of this invention. Similarly, it is a perspective view of an auxiliary member. It is a principal part schematic diagram of 2nd Embodiment of this invention. It is a principal part schematic diagram of 3rd embodiment of this invention. It is a principal part schematic diagram of 4th Embodiment of this invention. It is a principal part schematic diagram of 5th Embodiment of this invention. It is a principal part schematic diagram of 6th Embodiment of this invention. It is a schematic diagram of 7th Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is a top view. It is a schematic diagram of other embodiment of this invention. It is a schematic diagram of further another embodiment of this invention. It is a schematic diagram which shows the conventional weed prevention structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weed 1a Root 2 Weed prevention structure 3 1st structure 301 Pedestrian road boundary block (concrete secondary product, 1st structure)
302 Support (first structure)
303 U-shaped gutter (secondary concrete product, first structure)
3a First surface 3b Hollow portion forming groove 3c Upper surface 3d Lower surface 3e Back surface 4 Second structure 401 Road component (second structure)
402 Columnar (second structure)
4a Second surface 5 Gap 5a Inlet 6 Hollow portion 7 Auxiliary member 7a Inclined surface 7b First proximity surface (proximity surface)
7d Hollow forming groove 7k Upper protruding piece 7m Lower protruding piece 8 Base layer

Claims (15)

The weed prevention that prevents the growth of weeds from the gap extending from the outside to the lower side between the first surface and the second surface facing each other in the first structure and the second structure arranged in contact with each other. Structure,
In order to cut off the supply of moisture to the root of the weeds extending downward through the gap, the gap passes and no water stays at a position below the entrance of the gap. A herbicidal structure characterized in that a hollow portion is provided to guide the root. The second structure is formed by arranging and solidifying the irregular structure forming material,
An auxiliary member is provided along the first surface as it is buried without being exposed to the structure forming material,
The weed prevention structure according to claim 1, wherein the hollow portion is provided between the auxiliary member and the first structure.   The weedproof structure according to claim 2, wherein the auxiliary member has an inclined surface which is inclined so that a distance from the first surface increases toward an upper end portion of the auxiliary member.   The weedproof structure according to claim 2 or 3, wherein the auxiliary member has a proximity surface facing the first surface above the hollow portion.   The hollow part formation groove | channel which is covered with the said 1st surface and forms the said hollow part is provided in the said auxiliary member so that it may extend laterally along the said auxiliary member, The thru | or 2 characterized by the above-mentioned. The herbicidal structure according to any one of 4.   The hollow portion forming groove which is covered with the auxiliary member and forms the hollow portion is provided on the first surface so as to extend laterally along the first surface. The herbicidal structure of any one of thru | or 4.   A hollow portion forming groove that forms the hollow portion is provided on the auxiliary member and the first surface so as to face each other so as to extend laterally along the auxiliary member and the first surface. The weed control structure according to any one of claims 2 to 4, wherein the weed control structure is provided.   8. The auxiliary member according to claim 6 or 7, wherein the auxiliary member has an upper protruding piece that extends close to an upper surface of the hollow portion forming groove on the first surface and extends to an intermediate position in the depth direction of the hollow portion forming groove. The described herbicidal structure.   9. The auxiliary member according to claim 6, wherein the auxiliary member has a lower protruding piece that is in contact with the lower surface of the hollow portion forming groove on the first surface and extends to the inner surface of the hollow portion forming groove. The described herbicidal structure.   The said 2nd structure is arrange | positioned on a base layer, The said auxiliary member is arrange | positioned so that it may mount on the said base layer, The one of Claim 2 thru | or 9 characterized by the above-mentioned. Weedproof structure.   The said 1st structure consists of a concrete secondary product embed | buried in a road surface, The said 2nd structure consists of a road structure part, The Claim 1 characterized by the above-mentioned. Weedproof structure.   The hollow portion forming groove that forms the hollow portion so as to be covered with the other surface on one surface of the first surface and the second surface so as to extend laterally along the one surface. The weedproof structure according to claim 1, wherein the weedproof structure is provided.   A hollow portion forming groove for forming the hollow portion is provided on the first surface and the second surface so as to face each other so as to extend laterally along the first surface and the second surface. The herbicidal structure according to claim 1, wherein   The weedproof structure according to claim 12 or 13, wherein the first structure is formed of a support, and the second structure is formed of a columnar material supported by the support. The weed prevention that prevents the growth of weeds from the gap extending from the outside to the lower side between the first surface and the second surface facing each other in the first structure and the second structure arranged in contact with each other. A method,
Provided at a position below the entrance of the gap is a hollow portion through which the roots of the weeds are introduced so that the gap does not pass and water does not accumulate, and the root extending downward through the gap is guided to the hollow portion. The grass prevention method is characterized in that the water supply to the root is cut off by contacting the root with air.

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