JP7165632B2 - protective board - Google Patents

Description

TECHNICAL FIELD The present invention relates to a protective board for protecting the ground around the roots of trees such as roadside trees.

2. Description of the Related Art Conventionally, around the roots of trees such as roadside trees planted beside paved sidewalks in urban areas, etc., protective plates are arranged to protect the roots of the trees from being stepped on by people and vehicles.

As this type of protective panel, generally used one is made of cast iron, or one in which a frame body is covered with a cover plate such as a tile or decorative panel. As a cast-iron protection board, one having a large number of through holes penetrating in the vertical direction is known (see, for example, Patent Document 1). Also, as a protection board in which a frame is covered with a cover plate, there is known one in which a divided metal seat plate laid on the ground is covered with a lightweight decorative panel (see, for example, Patent Document 2).

JP-A-2005-34091 Japanese Patent Application Laid-Open No. 2006-320272

However, the cast iron protective board becomes very slippery and dangerous when it gets wet, for example in the rain, and is not necessarily suitable for people to walk safely. Furthermore, cast iron protective panels are not easy to shape compared to cover panels such as decorative panels. difficult to match. As a result, cast-iron protective plates are sometimes shunned by sidewalk trees.

On the other hand, the protective board with the cover plate covered on the frame body is easy to process and shape, so various designs can be adopted and it is excellent in design, but compared to the cast iron protective board When used outdoors for a long period of time, it tends to deteriorate over time and become unattractive. For this reason, the protective board in which the frame body is covered with a cover plate may be avoided by trees on the side of the roadway.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. To provide a cast-iron protective plate which can be made of cast iron and is excellent in design.

In order to solve the above problems, the present invention provides a cast-iron protective board comprising a frame and a plurality of protective members arranged in a row within the frame, wherein the protective member is a long The width of the protective member is wider than the interval between the adjacent protective members, and the upper surface of the protective member is alternately provided with convex surfaces and concave surfaces that are substantially square in plan view along the longitudinal direction. The convex surfaces and the concave surfaces are arranged in a zigzag pattern on upper surfaces of the plurality of adjacent protective members, and the convex surfaces extend along the longitudinal direction of the protective members. It is characterized in that it is composed of two kinds of surfaces: a laterally grooved convex surface having a plurality of laterally grooved portions, and a longitudinally grooved convex surface having a plurality of longitudinally grooved portions along the width direction of the protective member .

In the protective board, it is preferable that the laterally grooved convex surfaces or the longitudinally grooved convex surfaces are arranged in a specific pattern so that patterns, figures, or characters are expressed on the upper surfaces of the plurality of protective members.

In the protective board, the lateral groove or the vertical groove preferably has a width of 1 to 6 mm and a depth of 1 to 6 mm.

In the above protective board, it is preferable that the width of the protective member is 12 to 30 mm, and the distance between adjacent protective members is 5 to 10 mm.

In the above protective board, a plurality of middle beam members are provided in a row in the frame so as to be perpendicular to the protective member, and the middle beam member supports the protective member from the lower surface of the protective member. is preferred.

According to the present invention, since the frame body and the plurality of protective members are made of cast iron, sufficient durability can be obtained even when installed on the side of the roadway. In addition, since the upper surface of the protective member is formed with a convex surface and a concave surface, the unevenness prevents slippage and prevents water from accumulating. be able to. Moreover, since the convex surfaces and the concave surfaces are arranged in a houndstooth pattern, the design is excellent.

The perspective view of the protection board which concerns on one Embodiment of this invention. The disassembled perspective view of the said protection board. The top view of the said protection board. The bottom view of the said protection board. (a) is a side view from direction A in FIG. 1, and (b) is a side view from direction B in FIG. FIG. 3 is an enlarged perspective view of a portion indicated by a dashed line in FIG. 3 ; (a) is a front view of the portion shown in FIG. 6, (b) is a rear view, (c) is a plan view, (d) is a bottom view, (e) is a right side view, and (f) is a left side view. The perspective view of the protection board which concerns on the 1st modification of the said embodiment. The perspective view of the protection board which concerns on the 2nd modification of the said embodiment. The perspective view of the protection board which concerns on the 3rd modification of the said embodiment. The perspective view of the protection board which concerns on the 4th modification of the said embodiment. The perspective view of the protection board which concerns on the 5th modification of the said embodiment. The perspective view of the protection board which concerns on the 6th modification of the said embodiment.

A protective board according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. A protective board is provided around the roots of trees such as roadside trees planted beside a paved sidewalk in an urban area to protect the roots of the trees from being stepped on by people or vehicles. 3 and 4 are referred to as the horizontal direction and the vertical direction as the vertical direction for the sake of convenience in the following description, either direction is the horizontal direction in the protective board actually laid on the ground. or vertical.

As shown in FIG. 1, the protective board 1 of the present embodiment is made of cast iron and includes a frame 2 and a plurality of protective members 3 arranged in rows within the frame 2 . The frame body 2 has an outer frame 21 which is rectangular in plan view, and a rectangular inner frame 22 which is provided in the center and surrounds a tree (not shown). For example, the size of one side of the outer frame 21 is 1000 to 2500 mm, and the size of one side of the inner frame 22 is 400 to 1000 mm.

As shown in FIG. 2, the protective board 1 is mainly composed of four L-shaped protective boards 10 in plan view. One protective plate 10 has an L-shaped outer frame 21 and an inner frame 22 as well as two side connecting frames 23 that connect adjacent protective members 3 . That is, the frame body 2 is composed of an outer frame 21 , an inner frame 22 and a connecting frame 23 .

A bolt insertion hole 24 for connection with the adjacent protection plate 10 is provided in the vicinity of the inner frame 22 of the connection frame 23 . The bolt insertion holes 24 of one protection plate 10 are formed in a semi-cylindrical shape, and the bolt insertion holes 24 of the two protection plates 10 are combined to form a hole through which one bolt 26 is inserted. . The bolt insertion hole 24 has a countersunk portion in which the head of the bolt 26 and the washer are accommodated, and a cylindrical portion through which the shaft portion of the bolt 26 is inserted.

A connector 25 is arranged on the bottom side of the protection plate 10 (see also FIGS. 4, 5(a) and 5(b)). The connector 25 has a threaded hole into which the threaded portion of the bolt 26 is screwed, and projections that protrude upward from both side ends of the threaded hole in a plan view. Both protrusions are engaged with the connecting frames 23 of the adjacent protection plates 10 and the bolts 26 are tightened, thereby connecting the adjacent protection plates 10 .

As shown in FIGS. 3 to 5, the protective member 3 is elongated, and its width W is wider than the gap G between the adjacent protective members 3. As shown in FIGS. The protection plate 10 (protection plate 1) includes a plurality of middle rail members 4 arranged in a row in the frame 2 so as to be perpendicular to the protection member 3 (see FIG. 4 in particular). The middle rail member 4 supports the protection member 3 from the lower surface of the protection member 3 . One protective plate 10 is composed of a frame 2, a protective member 3, and a middle rail member 4, and is integrally formed of cast iron.

In the illustrated configuration example, 30 protective members 3 are provided in a row for one protective plate 10 (see FIG. 3), and five middle rail members 4 are provided. 5(a) is a side view from direction A in FIG. 3, and the longitudinal direction of the protective member 3 is drawn on the front. 5(b) is a side view from direction B in FIG. 3, and the width direction of the protective member 3 is drawn on the front.

6 and FIGS. 7(a) to (f) are enlarged views of the part indicated by the dashed line in FIG. This enlarged portion includes the inner frame 22 and the middle rail member 4 arranged in parallel, and the four protection members 3 arranged perpendicular to the inner frame 22 and the middle rail member 4 . Since the inner frame 22 is a structural member forming the outer shell of the protective plate 10, it is thicker in the height direction than the protective member 3 so as to ensure sufficient strength. On the other hand, although the protective member 3 is thinner than the inner frame 22, it is arranged in parallel and supported by the intermediate frame member 4, so that the required strength can be ensured.

It is preferable that the width W of the protective member 3 is 12 to 30 mm, and the interval G between adjacent protective members 3 is 5 to 10 mm (particularly, see FIG. 7(c)). Thus, by making the width W of the protective member 3 wider than the interval G between the protective members 3, the area of the protective member 3 on the upper surface of the protective board 1 is increased, and a person can safely walk on it. can be done. Moreover, since the gap G is 10 mm or less, it is possible to prevent the heel portion of women's shoes from fitting into the gap G, for example.

In addition, on the upper surface of the protective member 3, convex surfaces 31 and concave surfaces 32 which are substantially square in plan view are alternately provided along the longitudinal direction. In addition, on the upper surfaces of a plurality of adjacent protective members 3, the convex surfaces 31 and the concave surfaces 32 are arranged in a houndstooth pattern. With such a configuration, the convex surfaces 31 and the concave surfaces 32 look like a houndstooth pattern, and the design can be improved compared to the case where the upper surface of the protective member 3 is flat.

Moreover, the convex surface 31 and the concave surface 32 form unevenness on the upper surface of the protective member 3 and function as anti-slip for a person walking on it. In addition, even when it rains and gets wet, water is accumulated on the concave surface 32 and drained to the gap G, and water is not accumulated on the convex surface 31, so that a person walking on the protective board 1 is prevented from slipping. can be suppressed.

Furthermore, the convex surface 31 includes a lateral groove convex surface 31a having a plurality of lateral groove portions 33a along the longitudinal direction of the protective member 3 and a longitudinal groove convex surface having a plurality of longitudinal groove portions 33b along the width direction of the protective member 3. 31b and . In the configuration example shown in FIG. 7(c), the convex surfaces 31 of the upper two rows of protection members 3 are vertical groove convex surfaces 31b, and the convex surfaces 31 of the lower two rows of protection members 3 are lateral groove convex surfaces. 31a. By using the convex surface 31 as the lateral groove convex surface 31a or the vertical groove convex surface 31b, finer unevenness is formed on the upper surface of the protective board 1, and the anti-slip function can be improved.

The lateral groove convex surface 31a and the longitudinal groove convex surface 31b are not limited to the arrangement shown in the figure. The protection member 3 may also have a portion where the lateral groove convex surfaces 31a are continuously arranged or a portion where the longitudinal groove convex surfaces 31b are continuously arranged.

The protective plate 10 (protective plate 1) made of cast iron is generally black, but since it is metal, it reflects external light to a certain extent. Of the lateral groove convex surface 31a and the vertical groove convex surface 31b, the horizontal surface easily reflects external light, so it looks relatively whitish. On the other hand, the vertical surfaces of the lateral grooves 33a and the vertical grooves 33b are less likely to reflect external light and appear relatively dark. Therefore, from the direction A shown in FIG. 3, the lateral groove convex surface 31a formed with the lateral groove portions 33a appears blackish, and the vertical groove convex surface 31b formed with the vertical groove portions 33b appears whitish. On the other hand, from the direction B shown in FIG. 3, the vertical grooved convex surface 31b formed with the vertical grooves 33b appears blackish, and the lateral grooved convex surface 31a formed with the horizontal grooves 33a appears whitish. That is, by arranging the lateral groove convex surfaces 31a or the vertical groove convex surfaces 31b in a specific pattern, patterns, figures, characters, or the like can be expressed on the upper surfaces of the plurality of protective members 3. FIG.

In the configuration example shown in FIG. 3, of the convex surfaces 31 and the concave surfaces 32 arranged in a houndstooth pattern in units of 10×10 squares, the convex surface 31 is the lateral groove convex surface 31a in the region Y (see FIG. 3). 3) and a region T (broken line region in FIG. 3) where the convex surface 31 is the fluted convex surface 31b. From the A direction, the area T looks blackish and the area Y looks whitish. In this way, a houndstooth pattern with larger squares than the houndstooth pattern formed by the convex surfaces 31 and the concave surfaces 32 is formed on the entire upper surface of the protective plate 1 . The protection plate 1 of the present embodiment is mainly composed of four protection plates 10, and is not configured by combining members in units of 10×10 squares in a block shape.

The lateral groove portion 33a or the vertical groove portion 33b preferably has a width of 1 to 6 mm and a depth of 1 to 6 mm. By setting the depth of the lateral groove portion 33a or the vertical groove portion 33b to 1 mm, the reflection of external light on the horizontal surface and the vertical surface are different, so that shading can be generated and a pattern or the like can be expressed. In addition, although the configuration in which two lateral grooves 33a or vertical grooves 33b are provided for one convex surface 31 is shown in the example of the drawing, the number of lateral grooves 33a or vertical grooves 33b may be three or more. , in that case, the width and depth should be reduced.

The arrangement of the lateral groove convex surface 31a and the longitudinal groove convex surface 31b is not limited to the above embodiment, and various variations can be realized. For example, the first modification shown in FIG. 8 expresses a pattern of a plurality of hexagons arranged in rows and straight lines connecting them on the upper surface of the entire protection board 1 . In addition, in the example of the drawing, in order to emphasize the portion of the pattern, part of the portion of the squares of the fluted convex surface 31b is indicated by a broken line. A second modification shown in FIG. 9 expresses a striped pattern arranged obliquely with respect to the rectangular protection plate 1 . Furthermore, in the third modification shown in FIG. 10, "BE
KOBE" is expressed.

In this way, depending on the arrangement pattern of the lateral groove convex surface 31a and the vertical groove convex surface 31b, even if the cast iron protective plate 10 itself is not colored, the appearance of the upper surface of the protective plate 1 is improved by the reflection of external light. Patterns, figures, characters, etc. can be expressed by adding shading to the upper color, and the design of the protective board 1 can be further enhanced.

As described above, according to the protection panel 1 of the present embodiment, the frame 2 and the plurality of protection members 3 are integrally formed of cast iron, so that sufficient durability can be obtained even if it is laid on the side of the roadway. be able to. In addition, since the upper surface of the protective member 3 is formed with a convex surface 31 and a concave surface 32, the unevenness prevents slippage and prevents water from accumulating. can walk to In addition, since the convex surfaces 31 and the concave surfaces 32 are arranged in a houndstooth pattern, the design is excellent. Designability can be further enhanced by expressing a pattern or the like.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. In the above-described embodiment, the rectangular protective board 1 is shown in plan view, but the outer frame 21 and the inner frame 22 may be a circular protective board 1 as in the fourth modification shown in FIG. 11 . Alternatively, as in a fifth modification shown in FIG. 12, a U-shaped protective plate 1 in which two protective plates 10 are connected may be used. Moreover, like the 6th modification shown in FIG. 13, the rectangular protective board 1 by planar view may be used as a cover for gutter|ditch, for example.

1 Protective board 2 Frame 3 Protective member 31 Convex surface 31a Horizontal groove convex surface 31b Vertical groove concave surface 32 Concave surface 33a Horizontal groove 33b Vertical groove 4 Intermediate beam member G Space between protective members W Width of protective member

Claims (5)

A cast-iron protective board comprising a frame and a plurality of protective members arranged in rows in the frame,
The protective member is elongated and has a width wider than the interval between the adjacent protective members,
The upper surface of the protective member is alternately provided with convex surfaces and concave surfaces that are substantially square in plan view along the longitudinal direction thereof,
The convex surfaces and the concave surfaces are arranged in a houndstooth pattern on upper surfaces of the plurality of adjacent protective members ,
The convex surface has two types: a laterally grooved convex surface having a plurality of lateral grooves along the longitudinal direction of the protective member, and a longitudinally grooved convex surface having a plurality of longitudinal grooves along the width direction of the protective member. A protection board characterized by comprising: A pattern, a figure, or a letter is expressed on the upper surface of the plurality of protective members by arranging the lateral groove convex surface or the vertical groove convex surface in a specific pattern. Protective board as described. 3. The protective panel according to claim 1, wherein the lateral groove or the vertical groove has a width of 1 to 6 mm and a depth of 1 to 6 mm . 4. The protective panel according to claim 1, wherein the width of the protective member is 12-30 mm, and the distance between adjacent protective members is 5-10 mm . A plurality of middle rail members provided in a row in the frame so as to be orthogonal to the protective member,
5. The protective panel according to claim 1 , wherein the intermediate rail member supports the protective member from the lower surface of the protective member .

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