JP3055802U - Non-slip grating - Google Patents

Abstract

(57) [Summary] [Problem] High anti-slip effect, less wear and deformation,
Moreover, it provides a non-slip grating structure with good running properties. SOLUTION: In a grating 10 in which a large number of main members 20 are juxtaposed in a predetermined plane shape by end bars 30 at both end portions and a twist bar 35 at an intermediate portion, the main member 20 is composed of a standing piece 21 and a standing piece. The upper portion 22 has a substantially T-shaped cross section, and the upper portion has a height substantially equal to or greater than the thickness of the upper portion. A large number of ridges 25 inclined with respect to the longitudinal direction of the one piece are provided at equal intervals over the entire width direction, and each end 25 adjacent to the inclined ridge is provided.
a, 25b are arranged so as to overlap each other on a line L orthogonal to the longitudinal direction of the upper piece.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The invention relates to gratings, and in particular to non-slip gratings.

[0002]

[Prior art]

 High sliding resistance is required for drainage ditches on roads, especially gratings (groove lids) provided on road side gutters or road crossing ditches such as highways and roads with heavy traffic or curves. Such a non-slip grating 50 is used. The grating 50 with a non-slip is provided with a protruding portion 52 having a height of 1 mm and spaced apart from the upper surface of a main member 51 having an I-shaped cross section to form an uneven portion 53 to prevent slipping of a vehicle. 5 and 6, reference numeral 55 denotes a twist bar for connecting and integrating the main members 51 at predetermined intervals, 56 denotes end bars provided at both ends of the main members 51, and 57 denotes a frame member.

However, since the grating 50 is formed by forming the protrusion 52 on the upper surface of the main member 51 having an I-shaped cross section as described above, the uneven portion serving as an anti-slip of the vehicle is provided. The width and height of 53 were not sufficient, and a high anti-slip effect could not be expected. In particular, when used on a highway or a place with a lot of traffic, the protrusion 52 is worn in a short time, or a sufficient anti-slip effect due to sand or the like during rainfall. There was a problem that it could not be obtained.

[0004]

[Problems to be solved by the invention]

 The present invention has been made in view of the above points, has a high anti-slip effect, and is durable, has little wear and deformation even when used on a highway or a place with heavy traffic, and It provides a new non-slip grating structure with good runnability.

[0005]

[Means for Solving the Problems]

 That is, the invention of claim 1 is a grating in which a large number of main members are arranged in a predetermined plane shape by end bars at both ends and a twist bar at an intermediate portion. The upper piece has an upper surface having a height substantially equal to or greater than the thickness of the upper piece on the upper surface of the upper piece. A large number of ridges that are inclined with respect to the longitudinal direction are provided at equal intervals over the entire width direction, and adjacent ends of the inclined ridges are aligned with the longitudinal direction of the upper piece. The present invention relates to non-slip gratings, which are arranged so as to overlap each other on orthogonal lines.

A second aspect of the present invention relates to the non-slip grating according to the first aspect, wherein the inclined ridge portion is formed in a straight line.

[0007] A third aspect of the present invention relates to a non-slip grating according to the first or second aspect, wherein the inclined ridges are arranged so that the inclination directions of the inclined ridges are alternately arranged in adjacent main members.

[0008]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an overall plan view showing a grating according to an embodiment of the present invention, FIG. 2 is a partial perspective view of a main member thereof, FIG. 3 is a partial plan view in which a part of FIG. 1 is enlarged, and FIG. It is sectional drawing cut | disconnected by the 4-4 line.

The illustrated grating 10 is installed in a groove opening such as a drainage groove, and is made of a metal such as steel, stainless steel, or a casting. As shown in FIG. 1, the main members are arranged in parallel at regular intervals. Numerals 20 and 20 are formed in a predetermined plane shape (a rectangular shape in the figure) by end bars 30 at both ends and a twist bar 35 at an intermediate portion. The grating 10 of the embodiment is for a road crossing groove, and has a size of about 500 mm in width and 1000 mm in length. The traveling direction of the vehicle in this case is the direction of arrow PP in the figure.

In FIG. 1, an end bar 30 is made of flat steel and fixedly welded to both ends of a main member 20 to fix the main member 20 in a predetermined shape. Further, the twist bar 35 is made of a torsion angle steel and is crimped in a direction perpendicular to the main member 20 to hold the main member 20 in parallel at regular intervals and increase the overall strength.

As can be clearly understood from the perspective view of FIG. 2, the main member 20 in the devised structure has a cross section T including a standing piece 21 and an upper piece 22 having substantially the same thickness as the standing piece 21. An inclined ridge 25 having a thickness substantially equal to or greater than that of the upper piece 22 is formed on the upper surface 23 of the upper piece 22. The upper piece 22 is formed to have a T-shaped cross section having a thickness substantially equal to that of the upright piece 21 in order to increase the surface area of the upper piece 22 and to provide a large inclined protruding ridge 25 having a high height. It is. In the embodiment, the thickness t1 of the standing piece 21 and the thickness t2 of the upper piece 22 are both about 4 mm, and the height h of the inclined ridge 25 is about 5 mm.

A large number of inclined ridges 25 are provided at equal intervals with respect to the longitudinal direction A of the upper piece 22 and at equal intervals over the entire width B of the upper piece 22. At the same time, the inclined ridges 25 are arranged such that the ends (eg, 25a and 25b in FIG. 2) of the adjacent inclined ridges 25 overlap each other on a line L orthogonal to the longitudinal direction A of the upper piece 22. It is located. That is, each inclined ridge 25 is formed without a gap on a line L orthogonal to the longitudinal direction A of the upper piece 22. For such an arrangement, the interval and the inclination angle of each inclined ridge 25 are selected. In the embodiment of FIG. 2, the interval D between the inclined ridges 25 is about 9 mm, and the inclination angle d is about 30 degrees. Incidentally, the width b of the upper piece 22 is about 18 mm, and the width w of the inclined ridge 25 is about 5 mm.

The arrangement of the inclined ridges 25 as described above means the following. First, since the inclined ridge 25 is formed on the line L perpendicular to the longitudinal direction A of the upper piece 22 without any gap, only a single vehicle or the like passes through the upper piece 22. Since the main member 20 always comes into contact with the inclined ridge 25 at any position, the entire grating has an extremely large contact area with a passing vehicle or the like, has a high grip force, and has a large anti-slip effect. Secondly, even when the inclined piece 25 having a height is formed on the upper piece 22, the passing vehicle or the like always comes into contact with the piece 25 at any position in the single main member 20. Good running performance without rattling. Third, as shown in FIGS. 3 and 4, a twist bar 35 perpendicular to the longitudinal direction is crimped to the main member 20 (20A, 20B, 20C, 20D, 20E) arranged in parallel. At this time, the twist bar 35 engages with any of the inclined ridges 25, 25, 25, 25 at any position of each main member 20 and has a high coupling force. In other words, since the twist bar 35 is fixed to the inclined ridge 25 without any gap in each main member 20, high strength is maintained as the entire grating. Even when a foreign substance such as a stone is caught in the space S between the main members 20, the main members 20 are prevented from being easily spread or deformed.

The inclined ridges 25 in the grating 10 of the illustrated embodiment are formed in a straight line (oblique line) as defined in claim 2, but may be formed in a plane V shape or the like. You can also.

In the grating 10, as shown in FIGS. 1 and 3, and as defined in claim 3, the inclined ridges 25 of the adjacent main members 20 are arranged so that the inclination directions thereof are alternated. With this arrangement, the anti-slip effect can be further enhanced. In order to arrange in this way, it is only necessary to alternately arrange the front and back of each main member 20 in the longitudinal direction.

[0016]

[Effect of the invention]

 As shown and described above, in the grating with anti-slip of the present invention, the main member is formed to have a T-shaped cross section composed of a standing piece and an upper piece having substantially the same thickness as the standing piece. Compared to the conventional I-shaped main member, the upper piece can have a larger area and a higher strength. On the upper surface of the upper piece having a large area, a ridge having a thickness substantially equal to or greater than that of the upper piece and inclined with respect to the longitudinal direction of the upper piece is provided over the entire width direction. By protruding many at equal intervals, it is possible to provide a non-slip portion having a high anti-slip effect, excellent strength, and durability.

In particular, in the present invention, as described above, the adjacent end portions of the inclined ridge portion are arranged so as to overlap each other on a line orthogonal to the longitudinal direction of the upper piece portion. Since a passing vehicle always contacts the inclined ridge at any position in the single main member, it has an extremely large contact area as a whole grating, has a high grip force, and has a large anti-slip effect. At the same time, running performance is good. Also, at the time of coupling with the twist bar, the twist bar engages with any of the inclined ridges at any position of each main member, so that high strength is maintained as a whole grating and the space between the main members is maintained. Even if a foreign substance such as a stone is caught, the main member is prevented from being easily spread or deformed.

Further, in the grating defined in claim 2, the manufacturing is easy by forming the inclined convex portion in a straight line.

Furthermore, in the grating defined in claim 3, since the inclination direction of the inclined ridge is alternately arranged in the adjacent main member, the grip force is improved. It exerts a high anti-slip effect on passing vehicles and the like.

[Brief description of the drawings]

FIG. 1 is a plan view showing grating according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of the main member.

FIG. 3 is an enlarged partial plan view of a part of FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a partial perspective view showing an example of conventional grating with anti-slip.

FIG. 6 is a partial sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grating with non-slip 20 Main member 21 Standing piece 22 Upper piece 25 Inclined ridge 30 End bar 35 Twist bar

Claims (3)

[Utility model registration claims] 1. A grating in which a number of main members are juxtaposed in a predetermined plane shape by end bars at both ends and a twist bar at an intermediate portion, wherein the main members are substantially the same as the standing piece and the standing piece. It is configured in a T-shaped cross section composed of an upper piece having a thickness, and the upper surface of the upper piece has a height substantially equal to or greater than the thickness of the upper piece and has a height in the longitudinal direction of the upper piece. A large number of convex ridges that are inclined with respect to each other are provided at equal intervals over the entire width direction thereof, and adjacent ends of the inclined convex ridges are mutually separated on a line orthogonal to the longitudinal direction of the upper piece. Non-slip grating that is arranged to overlap. 2. The non-slip grating according to claim 1, wherein the inclined ridges are formed in a straight line. 3. The non-slip grating according to claim 1, wherein the inclined ridges are arranged such that the inclination directions of the inclined ridges are alternately arranged in adjacent main members.