L-shaped block with weed prevention function
The L-shaped block design with a 'weed-cutting notch' and elongated groove addresses soil accumulation and seed germination in gaps, improving visibility and lowering maintenance costs by preventing weed growth.
Patent Information
- Application Number
- JP2025001371U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-04-13
- Publication Date
- 2025-07-16
- Estimated Expiration
- 2035-04-13
AI Technical Summary
Conventional L-shaped blocks allow soil to accumulate in gaps between the sidewalk and roadway, facilitating the growth of unwanted plants, leading to reduced visibility and increased maintenance costs.
Incorporating a 'weed-cutting notch' and an elongated groove in the L-shaped block design to prevent direct soil contact and seed germination, reducing the growth of unwanted plants.
The design effectively minimizes seed germination and root expansion, enhancing visibility and reducing maintenance costs by inhibiting weed growth.
Smart Images

Figure 0003252020000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of L-shaped blocks, and more specifically, to their shape.
Background Art
[0002] An L-shaped block used at the boundary between a roadway and a sidewalk, when installed in its current shape, will develop a gap over time between the asphalt on the sidewalk side and the roadway side. Seeds of unwanted plants easily enter this gap, and as a result, unwanted plants thrive in this gap.
[0003] Moreover, the overgrown unwanted plants make it difficult for people in vehicles to see pedestrians on the sidewalk and vice versa, which has led to traffic accidents and accidents where people fall from the sidewalk to the roadway.
[0004] In addition, in order to restore the reduced visibility, the road management authorities have the responsibility of weeding, which not only requires a large amount of money but also in some cases, due to budget shortages, weeding is not carried out and the situation is left unattended.
[0005] Also, since the road management authorities do not get a new opportunity to update the L-shaped blocks they have installed once for a very long time, a huge budget has been continuously generated over the years to keep weeding the unwanted plants during this period.
Summary of the Invention
Problems to be Solved by the Invention
[0006] In a conventional L-shaped block, soil easily enters the gap between the sidewalk and the roadway, and the gap is connected to the soil laid under the sidewalk and the roadway. Therefore, when seeds of unwanted plants germinate in this gap, they will sprout. Also, since there is abundant soil under the sidewalk and the roadway, it is easy for the roots to spread out, and as a result, perennial unwanted plants especially tend to thrive.
[0007] In addition, traffic accidents and pedestrian falls from the sidewalk to the roadway are occurring due to reduced visibility caused by the overgrowth of unwanted plants.
[0008] In addition, road management authorities incur a great deal of expense in weeding the overgrown unwanted plants. ru.
Means for Solving the Problem
[0009] Provide a "weed-cutting notch" in the conventional L-shaped block. When laying asphalt, by placing asphalt on this cut-out part during laying, the gap formed between the L-shaped block and the asphalt will not directly touch the soil buried under the sidewalk and roadway, so that the state where unwanted plants are difficult to grow can be maintained for a long time.
[0010] To enhance the effect of preventing the mixing of seeds of unwanted plants and to reduce the expansion of the gap between the weed-proof L-shaped block due to the shrinkage of asphalt, a "weed-proof and misalignment-preventing notch" in the shape of an elongated groove is provided.
Effect of the Invention
[0011] Since the soil cannot be seen directly between the weed-proof L-shaped block and the sidewalk, and between the weed-proof L-shaped block and the roadway, the chance of seeds of unwanted plants directly landing on the soil is greatly reduced, resulting in a situation where germination and overgrowth are difficult.
Brief Description of the Drawings
[0012]
Figure 1
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Industrial Applicability
[0013] Since it only requires preparing a mold for molding the weed-proof L-shaped block, production is easy.
[0014] Also, because there are cutout parts, the amount of concrete required for production can be reduced compared to conventional L-shaped blocks. Therefore, the manufacturing cost of the weed-proof L-shaped block of the present invention is lower than that of conventional products.
[0015] In addition, since the amount of concrete used is reduced, the weight of the L-shaped block is also reduced, making transportation easier and expecting cost reduction for a large amount of transportation.
Explanation of Signs
[0016] 1 Weed-proof cutout part 2 Weed-proof and misalignment prevention cutout part
Claims
1. A weed-proof L-shaped block, characterized in that a part of the rising portion of the L-shaped block is cut out.
2. A weed-proof L-shaped block, characterized in that a thin groove is provided in a shape where a part of the rising portion of the L-shaped block is cut out.