JP2001049731A - T-member for grating and grating incorporated with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grating capable of decreasing the possibility of being clogged with stones, providing a slip preventing function, and not to increase the weight so much as that even if the mesh of lattices of the grating is reduced. SOLUTION: This grating is formed so that vertical sashes and lateral sashes are assembled with each other in lattice shape so as to form an assembled lattice. A plurality of T-shaped members 1 comprising a horizontal plate part 11 formed in a plate shape, disposed horizontally, integrally forming raised parts 13 and disposed at specified pitches on the upper surface thereof and a plate like vertical plate part 12 suspending from the center part of the horizontal plate part 11, formed approximately in T-section and made of metal are assembled with their horizontal plate parts 11 turned upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating T-shaped member covered with an opening or the like of a drainage ditch and a grating using the same, and is particularly suitable for grating laid in a place where heavy vehicles and the like pass. is there.

[0002]

2. Description of the Related Art Grating is an assembly in which a vertical grid and a horizontal grid are formed in a grid shape and surrounded by a frame plate. A required number of gratings are installed in openings of various drainage grooves such as side grooves and cross grooves of roads and entrances. It guarantees rainwater drainage and allows human traffic. Of these gratings, those that are laid on bridges, etc., are mainly made of gratings that incorporate main members such as I-beams and H-beams in some of the vertical rails in order to allow the passage of heavy vehicles up to 25 tons. It is used. In such a grating, unlike a normal grating, a main member 5 (for example, an I-type steel), which is a shape steel material serving as a main bone, is arranged at regular intervals on a vertical crosspiece, while a band penetrating through the upper half thereof. A plate-like horizontal rail 82 is attached to the main member 5 (see FIG. 9). A plurality of flat plates or other auxiliary plates 81 are arranged between the main members 5, 5,.
After arranging 81, ..., a standard product has been made by surrounding the outer periphery with a frame plate 83.

[0003]

However, although the conventional grating has improved mechanical strength, it has the following problems. Stone clogging was apt to occur between the auxiliary plates 81 arranged vertically in the width direction of the flat steel, and once the stone was clogged, it did not easily fall off the grating. Since the grating was made of metal, it was slippery on the grating. The applicant of the present application has previously filed an application in which an H-shaped steel with a convex pattern is used as a main member as shown in FIG. 9 (Japanese Patent Application Laid-Open No. 10-146700).
However, the technology of the present invention did not have an anti-slip action at the auxiliary plate 81. Furthermore, in recent years, there has been a tendency to reduce the size of the grid so that a wheelchair or the like does not fit into the grid of the grating, but it has been difficult for conventional products to cope with the grid.
In the conventional product, when the auxiliary plates 81 are packed and arranged so as to reduce the grid size, the weight becomes heavy and the cost becomes high.

The present invention has been made to solve the above-mentioned problems, and it is intended to reduce the occurrence of clogging of stones, to provide a non-slip function, and to increase the weight of a grating T-type which does not significantly increase the weight even if the grating grid is reduced. An object is to provide a member and a grating using the same.

[0005]

In order to achieve the above object,
The gist of the invention according to claim 1 is that the vertical bar and the horizontal bar are used as the vertical bars of a grating formed by assembling them in a grid shape to form an assembled grid, and are arranged in a plate shape and arranged in a horizontal state. A horizontal plate portion (11) in which the raised portions are integrally formed and the raised portions are arranged at a predetermined pitch, and a plate-shaped vertical plate portion (12) hanging at the center of the horizontal plate portion. A T-shaped member for grating, which is formed in a letter shape and made of metal. The gist of the invention according to claim 2 resides in a grating having a set grid assembled in a grid shape with a vertical crosspiece and a horizontal crosspiece, and a frame plate fixed to an outer periphery of the set grid. The present invention is directed to a grating in which a plurality of the T-shaped members for grating according to the first aspect of the present invention are installed so that the horizontal plate portions thereof are arranged upward.

According to the first and second aspects of the present invention, the grating T is used.
When the grating in which the shaped members are incorporated is formed, the occupation ratio of the horizontal plate portion on the upper surface of the grating is increased, so that even if the same number of T-shaped members as in the related art are arranged, the grid size can be reduced. The horizontal plate portion has a certain area, and if ridges are arranged at a predetermined pitch here, a non-slip function can be provided. Then, below the horizontal plate, the vertical plate is equivalent to the conventional auxiliary plate made of flat steel, etc., so even if clogging occurs at the position of the horizontal plate, if it passes through it, it will easily go down Can be dropped. Therefore, a clogging failure in which pebbles are sandwiched between lattices is less likely to occur.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a grating T-shaped member according to the present invention and a grating using the same will be described in detail. 1 to 8 show an embodiment of a grating T-shaped member of the present invention and a grating incorporating the same. FIG. 1 is an overall perspective view of the grating, FIG. 2 is a side view of the grating T-shaped member, and FIG. 4 is a front view thereof, FIG. 5 is a side view of another embodiment of the grating T-shaped member, FIG. 6 is a plan view thereof, FIG. 7 is a partially enlarged view of FIG. 1, and FIG. FIG.

(1) T-shaped member for grating A T-shaped member for grating 1 of the present invention (hereinafter, simply referred to as "T-shaped member") is assembled into a lattice by a vertical bar and a horizontal bar to form an assembled grid. It is used as a vertical bar for grating. The T-shaped member 1 is made of metal and has a plate-like shape in which raised portions 13 are integrally formed on the upper surface and the raised portions 13 are arranged at a predetermined pitch as shown in FIGS. And a vertical plate portion 12 hanging down at the center of the horizontal plate portion 11 to form a T-shaped member 1 having a substantially T-shaped cross section. When the horizontal plate portion 11 of the T-shaped member 1 is arranged on the upper surface of the grating to form an assembled lattice, the vertical plate portion 12 is arranged in the same manner as in the case where the auxiliary plate 81 of flat steel or the like is erected. However, since the horizontal plate 11 projects horizontally from the top of the vertical plate 12 on the upper surface of the grating, the grating aperture ratio of the grating is reduced.

As shown in FIG. 2, the raised portion 13 has a circular arc shape when viewed from the side, and has a bow shape in which the center is raised. In the plan view of the raised portion 13, as shown in FIG. 3, the main portion 131 of the arc portion is rectangular, and side portions 132 inclined in a slope shape are provided on both sides of the main portion 131. The side portion 132 may be omitted. The raised portion 13 is located on the upper surface 11 of the horizontal plate portion 11.
a are arranged at a constant interval P1 (FIG. 4).

[0010] Specific numerical values of the T-shaped member 1 are as follows.
For example, in FIGS. 2 and 3, the horizontal width W1 of the horizontal plate 11 is about 20 mm, the thickness t1 of the horizontal plate 11 is about 3 mm, and the length L1 of the vertical plate 12 below the horizontal plate 11 is The thickness t2 of the vertical plate portion 12 is appropriately selected within a range of about 25 mm to 50 mm, and is about 4.5 mm. The top of the raised portion 13 has a height h1 of about 1.5 mm from the upper surface of the horizontal plate portion 11. The dimension e × f of the rectangle of the main portion 131 related to the raised portion 13 in FIG. 3 is approximately 14 mm × 4 mm.

FIGS. 5 and 6 show a T-shaped member 1 of another embodiment different from those shown in FIGS. The T-shaped member 1 shown in FIGS. 5 and 6 has a raised portion 14 in the shape of a truncated cone.
The diameter of the upper surface 141 of the base 4 is about 8 mmφ, and the diameter of the raised part 14 in contact with the horizontal plate 11 at the base 142 is about 10 mmφ. The height h2 of the raised portion 14 is about 2 mm from the upper surface of the horizontal plate portion 11. Other configurations are the same as those in FIGS.

(2) Grating incorporating a T-shaped member for grating FIG. 1 shows an example of a grating incorporating the above-mentioned grating member, that is, a T-shaped member 1. The grating has a set grid assembled by a vertical bar and a horizontal bar 82 in a grid shape, and a frame plate 83 fixed to the outer periphery of the set grid, and a necessary portion of the vertical bar is formed by a main member of a die steel material. The T-shaped member 1 is incorporated between the main members 5 so that a plurality of the T-shaped members 1 are arranged with the horizontal plate portion 11 facing upward. Here, the vertical bar means a bar arranged on a groove such as the side groove D so as to cross the groove D.

This grating has a standardized rectangular parallelepiped shape, and is composed of a number of vertical rails 1 and 5 and a horizontal rail 82 orthogonal to the vertical rails, and a surrounding grid is surrounded by a frame plate 83 having a constant width. . In the present embodiment, as shown in FIG. 1, a main member 5 made of a robust H-shaped steel is used at three places at the center and both sides of a vertical rail. These main members 5 are laid on the drainage grooves D so as to withstand the traffic of heavy vehicles. A convex portion 521 is integrally formed on the upper surface of the upper plate portion 52 of the main member 5,
The convex portions 521 are arranged in a staggered manner at a predetermined pitch to form a convex pattern 5.
21a is completed. The main member 5 made of the H-shaped steel or the I-shaped steel shown in FIG. 1 has the convex portion 521 integrally formed at the time of manufacturing the die steel. However, as in Japanese Patent Application Laid-Open No. 10-146700, an H-shaped steel or the like is first manufactured, The projection 521 may be formed later by molding or the like (FIG. 8). Reference numeral 59 denotes a through hole provided in the upright portion 53 of the main member 5 so that the horizontal rail 82 can pass therethrough (FIG. 4). Of course, the main member 5 may be provided with a through hole without providing a through hole, and a horizontal rail 82 cut to that size may be provided between the main members 5 and the main member 5 and the horizontal rail 82 may be fixed by welding.

The horizontal rail 82 is made of a slightly wide strip.
It penetrates the middle part of the main member 5 from side to side, and
It is assembled in a lattice with the shaped member 1).

A plurality of T-shaped members 1 are arranged between the main members 5 at equal intervals in parallel with the main members 5. At the place where the T-shaped member 1 and the horizontal rail 82 intersect, the part of the horizontal rail 82 is cut out. Horizontal plate 11 of T-shaped member 1 and upper plate 52 of main member 5
Are arranged such that their upper surfaces 11a and 52a are flush (FIG. 7). The slit width ε1 of the T-shaped member 1 and the grating formed by the T-shaped member 1 is constant. Further, each slit width ε3 formed by the main member 5 and the T-shaped member 1 is also constant. Although the gap ε1 and the slit width ε3 here are different (ε1 <ε3), it is more preferable to make them equal. This is because the probability that the wheelchair or the like falls into the grating slit width ε3 can be reduced under the same number of T-shaped members 1 used.

In FIG. 1, reference numeral 86 denotes a bottom plate which is in contact with the lower surface at both ends of the main member 5 to support the main member 5. The bottom plate 86 is provided with frame plates 83 at four corners around the grating of the square plate.
To the lower edge of the short plate 84 that descends vertically from here. The grating is supported by placing the bottom plate 85 on the side wall stepped portion G of the drain groove D (see FIG. 9).

(3) Effect The T-shaped member 1 configured as described above and the grating incorporating the same are provided with the horizontal plate portion 11 of the T-shaped member 1 serving as an upper surface and the T-shaped member 1 as a vertical bar. By doing so, it is possible to reduce the size of the grating grid and make it a fine type. Therefore, the heel of a shoe such as a wheelchair tire or a high heel does not fit into the lattice, and the safety-oriented grating is completed. The upper surface 11a of the T-shaped member 1 has a horizontal plate portion 11 and has a predetermined width in the horizontal direction. However, since the vertical plate portion 12 is provided below the horizontal plate portion 11, the grid size is reduced. Even so, the weight gain is very small.
Since the vertical plate portion 12 is provided, a certain strength can be guaranteed against a vertical load. In addition, since the T-shaped member 1 has a short horizontal plate portion 11 (corresponding to the thickness t1 of the horizontal plate portion 11) in the vertical length, even if the stone is clogged, the T-shaped member 1 can pass through the horizontal plate portion 11. It easily passes through the vertical plate portion 12. The pitch of the vertical plate 12 is ε2 (ε2> ε1)
The stones fall down without difficulty.
Furthermore, by arranging the partial raised portions 13 at a predetermined pitch on the upper surface 11a of the horizontal plate portion 11 of the T-shaped member 1, the T-shaped member 1 as an auxiliary plate can also be provided with a non-slip function. In the grating as shown in FIG. 1, if the T-shaped member 1 is disposed between the main members 5, the T-shaped member 1 serving as an auxiliary plate also has a non-slip function, so that slip on the grating is more reliably prevented. Can be prevented. Further, a grating is provided in which a required portion of the vertical bar is constituted by a main member 5 of a steel member such as an H-section steel, and a plurality of T-shaped members 1 are arranged between the main members 5 with its horizontal plate portion 11 facing upward. In this case, a grating that allows heavy vehicles to pass and has an improved anti-slip function is completed.

The present invention is not limited to the embodiment described above, but can be variously modified within the scope of the present invention depending on the purpose and application. The shape, size, and the like of the T-shaped member 1, the main member 5, the horizontal rail 82, and the like can be appropriately selected according to the application. In manufacturing the grating, a plurality of T-shaped members 1 are arranged on the main member 5 in the present embodiment.
It can also be.

[0019]

As described above, the T-shaped member for grating and the grating using the same according to the present invention can reduce the occurrence of clogging, provide a non-slip function, and reduce the size of the grating grid. It has excellent effects such as having the advantage that the weight does not increase much.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a grating incorporating a T-shaped member for grating according to the present invention.

FIG. 2 is a side view of a grating T-shaped member.

FIG. 3 is a plan view of the grating shown in FIG. 2;

FIG. 4 is a front view of the grating shown in FIG. 2;

FIG. 5 is a side view of another embodiment of a grating T-shaped member.

FIG. 6 is a plan view of the grating shown in FIG. 5;

FIG. 7 is a partially enlarged view of FIG. 1;

FIG. 8 is a partial perspective view of a main member.

FIG. 9 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 T-shaped member (vertical bar) 11 Horizontal plate portion 12 Vertical plate portion 13 Raised portion 82 Horizontal beam

Claims (2)

[Claims] A vertical bar and a horizontal bar are used as a vertical bar of a grating formed by assembling them in a grid to form an assembled grid. The bar is horizontally arranged in a plate shape, and a raised portion is integrally formed on the upper surface thereof. A horizontal plate portion (1) in which the raised portions are arranged at a predetermined pitch.
1) and a vertical plate portion (12) hanging down at the center of the horizontal plate portion. The T-shaped member for grating is made of a metal having a substantially T-shaped cross section. 2. The grating according to claim 1, wherein the grating comprises a grid, which is assembled in a grid pattern with the vertical bar and the horizontal bar, and a frame plate fixed to the outer periphery of the grid. Grating in which a plurality of T-shaped members are arranged with their horizontal plate portions facing upward.