JPH032124Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tree protection board that is placed at the base of trees planted in parks, streets, etc. to protect the roots from trampling pressure.

[Conventional technology]

Conventional tree protection boards are usually made of cast iron due to their robustness and productivity. For example, Japanese Utility Model Publication No. 54-42985 proposes a tree protection board in which a transparent pattern consisting of long holes is provided, and the thickness of the short side of each long hole is thinner than that of the long side. . In addition, in Utility Model Application Publication No. 54-46745, the main part has a blind or semi-blind structure,
A tree protection board with ventilation and water passages along the outer edge has been proposed.

[The problem that the idea aims to solve]

However, these cast iron tree protection boards are
Since it is relatively heavy, it is inconvenient to transport and handle during construction. Furthermore, when the metal surface is left exposed, it becomes easy for people to slip when walking on it. Moreover, the color of the cast iron itself did not harmonize with the surrounding environment, making it undesirable from an urban landscape perspective.

Furthermore, in conventional tree protection boards, when forming holes to ensure water permeability and ventilation,
Because the tree protection board itself had a lattice structure, after long-term use, cracks appeared due to the notch effect at the intersections of the vertical and horizontal lattices, and cases of breakage were often observed.

Therefore, the present invention was devised to solve these problems, and the purpose is to provide a tree protection board that is lightweight, has excellent structural strength and anti-slip effect, and can be colored. do.

[Means to solve the problem]

In order to achieve this purpose, the present invention provides a tree protection board that forms a space surrounding a tree in the center when the split boards are combined, and the split boards are made into a flat plate, and a plurality of split boards are arranged so as to be scattered over the entire surface of the tree protection board. In addition to providing a substantially circular hole, ribs are formed all around the peripheral edge of the split plate and the edge of the hole, and a filler layer is formed in the recess defined by each rib. Features.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is a plan view showing the entire tree protection board in this embodiment. This tree protection board 1 is made up of four divided boards 3 that form a space 2 surrounding a tree in the center when the sets are combined. Each divided board 3 is provided with approximately circular large holes 4 for inserting pile posts and small holes 5 for water passage and ventilation, which are scattered over the entire surface. By forming these large holes 4 and small holes 5 into substantially circular shapes, the occurrence of the notch effect is reduced, and together with the effect of the ribs 8, which will be described later, the structural strength is improved.

Note that these divided boards 3 are installed with adjacent divided boards 3 facing each other at the joint portion 6.

FIG. 2 is a sectional view of the tree protection board taken along the - line in FIG. 1.

A rib 8 is formed on the peripheral edge 10 of each divided plate 3 and extends in the vertical direction over the entire circumference. Similar ribs 8 are also formed on the upper surfaces of the edges of the large hole 4 and the small hole 5 over the entire circumference. Since the structural strength of the split plate 3 is improved by these ribs 8, the weight can be reduced accordingly.

A concave portion 9 partitioned by these ribs 8, 8 is formed on the upper surface of the split plate 3. This concave portion 9 is filled with a filler having a low specific gravity, and a filler layer 7 is provided at approximately the same height as the ribs 8, 8. Here, as the filler, resins such as epoxy and polyester,
Alternatively, resin mortar or the like in which silica sand, arbitrary pigments, etc. are added to these resins can be used. For example, when using a filler whose composition or color tone is adjusted depending on the environment in which the tree protection board 1 is installed, the tree protection board 1 will be in harmony with the environment. Furthermore, the filler layer 7 also improves the anti-slip effect of the tree protection board 1.

This tree protection board 1 is constructed by placing the peripheral parts 10 of four divided boards 3 on a curb placed around the base of a tree, and placing the space 2 formed in the center so as to surround the tree. Depending on the situation, it will be installed at the desired location. FIG. 3 is an enlarged plan view showing the joint portion of the dividing board 3 in the tree protection board 1 installed in this manner. As shown in this figure, ribs 8 are exposed at some places on the filler layer 7 on the upper surface of the dividing plate 3. The exposed rib 8 is
It forms the surface pattern of the tree protection board 1 and also serves as a support material for the filler layer 7 formed in the recessed part 9. Therefore, the filler layer 7 is prevented from being damaged or missing, and is used as a tree protection board 1 that has an excellent anti-slip effect over a long period of time. In addition, by extending the rib 8 to the surface, the large hole 4 and the small hole 5
The tree protection board 1 has the desired water permeability and ventilation without blocking the internal space with the filler.

Note that in the above example, a divided board 3 divided into four parts is used. However, the present invention is not limited to this, and it goes without saying that the present invention can be similarly applied to a tree protection board that combines divided boards divided into an appropriate number of parts, such as two or eight parts.

[Effect of idea]

As explained above, in the present invention, the hole is formed into a substantially circular shape, and ribs are formed around the edge of the hole and the entire circumference of the dividing plate, so that the notch effect occurs. It has a structure with improved structural strength, and by forming a filler layer of resin etc. with low specific gravity in the recesses on the surface of the divided plate partitioned by ribs, it has a structure with improved structural strength. It can be made thin and lightweight. Therefore, handling of the tree protection board becomes easy. In addition, this tree protection board has patterned holes scattered throughout the entire surface, which together with the filler layer improves the surface impression and provides water flow necessary for tree growth and protection. and sufficient ventilation. In this way, according to the present invention, a tree protection board that is lightweight, has an excellent anti-slip effect, and has a color tone that harmonizes with the surrounding environment can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the tree protection board of this embodiment;
Figure 2 is a sectional view taken along the - line in Figure 1;
The figure is an enlarged plan view of the joint portion of the split plate. 1: Tree protection board, 2: Space section, 3: Divided board,
4: Large hole (for inserting pile pillars), 5: Small hole (for water passage/ventilation), 6: Joint, 7: Filler layer, 8: Rib,
9: recessed part, 10: peripheral part.

Claims (1)

[Scope of utility model registration request] In a tree protection board that forms a space surrounding a tree in the center when the split boards are combined, the split board is flat and has a plurality of substantially circular holes scattered over its entire surface, and A tree protection board characterized in that ribs are formed all around the peripheral edge of the hole and the edge of the hole, and a filler layer is formed in the recess defined by each rib.