JPS63297654A - Grating - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a grating used for covering drains, covering openings in the floors of buildings, and the like. More particularly, the present invention relates to a grating constructed from a plurality of elongated plate members arranged side by side.

BACKGROUND OF THE INVENTION Generally, gratings that allow water to pass through are used as covers for openings in drains on roads, sidewalks, etc., floors of buildings, etc. Conventionally, gratings made of cast iron have been used, but recently pressed gratings made of a combination of elongated metal plates have been increasingly used. Such press-made gratings have advantages such as being lightweight, having high strength, and having a good appearance.

By the way, such conventional gratings have a large number of elongated plate-shaped so-called bearing bars arranged in parallel at predetermined intervals to receive loads, so when walking on this grating on a rainy day, etc. These bearing bars were slippery in the longitudinal direction, which was dangerous. In addition, conventional bearing bars are relatively weak against loads in the direction in which these bearing bars fall.For example, if a heavy vehicle such as a truck is riding on the grating of a road gutter and the vehicle suddenly starts, the bearings of this grating may There were problems such as the bar sometimes bending in the direction of falling.

[Problems to be Solved by the Invention] The present invention has been made based on the above circumstances, and an object of the present invention is to provide a grating that does not slip even on rainy days and has high structural strength. .

[Means for solving the problems and their effects] The present invention has the following features:
The bearing par is formed into a wave shape, these gratings are arranged so that their peaks and valleys abut, and the abutting parts of these bearing pars are connected to each other. Therefore, at least a portion of the upper edges of these bearing pars intersect with each other in any direction, so there is no risk of slipping even on rainy days. Further, since these bearing pars are connected to each other in a lattice shape, the strength in the direction of falling of these bearing pars is large, and the structure is strong.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

1 in the figure is a frame member. This frame member 1 is made of an elongated stainless steel material and has a rectangular shape. A large number of bearing pars 2 are arranged within this frame member 1. These bearing pars 2 are made of elongated stainless steel plates, and are arranged so that the surface direction thereof is vertical. These bearing pars 2 are bent into a wave shape, and have flat abutting portions 2b formed at the tops of the crests and bottoms of the valleys, and sloped portions 2a at other portions. These bearing pars 2 have contact portions 2b of the peaks of adjacent bearing pars.
and the valley contact portions 2b are arranged in an overlapping manner so as to contact each other. For example, five cross pars 3 are inserted through the contact portions 2b of these bearing pars 2.
are provided, and the contact portions 2b of each of the bearing pars 2 described above are integrally connected to each other by these cross pars 3. Note that the ends of these bearing pars 2 and cross pars 3 are welded to the frame member 1, respectively.

The connection structure of the penetrating portion between the bearing par 2 and the cross par 3 is constructed as shown in FIGS. 3 and 4. That is, each of the contact portions 2b of the bearing pars 2 is formed with an insertion hole 4 through which the cross par 3 is inserted. The shape of the insertion hole 4 is non-circular, for example square, and the sides thereof are inclined at about 45 degrees. Further, the cross-sectional shape of the cross spar 3 is a shape corresponding to the insertion hole 4, that is, a square, and is formed slightly smaller than the dimensions of the insertion hole 4, so that it can be inserted freely into the insertion hole 4. It is composed of In the case of this embodiment, the cross spar 3 is a square pipe made of stainless steel. Fitting notches 5 are formed at each corner of the cross pars 3 at intervals corresponding to the arrangement spacing of the bearing pars 2 described above.

After this cross spar 3 is inserted into the above-mentioned insertion hole 4, it is rotated about 45 degrees around its longitudinal axis as shown in FIG. 4, and as a result of this rotation, the fitting of this cross spar 3 The notch 5 fits into the edge of the insertion hole 4, and the cross spar 3 and the two overlapping contact portions 2b of the bearing spar 2 are configured to be integrally connected.

With such a device, the bearing par 2 and the cross par 3 can be connected at the same time by inserting the cross par 3 into the insertion hole 4 of the bearing par 2 and then rotating the cross par 3 with an appropriate tool. Manufacturing such a grating is efficient and easy, and since no welding is required, the appearance is good.

In this type of bearing par 2, the upper edge of the bearing par 2 is arranged in a grid or mesh pattern, so at least a part of it intersects in any direction, so it can be used on rainy days etc. It doesn't slip either. Further, since these bearing pars 2 are integrally connected in a grid or mesh pattern, these bearing pars 2 are strong against loads in the direction of falling, and have high structural strength.

Note that the present invention is not limited to the above embodiments.

For example, the structure for coupling the bearing pars to each other is not limited to the one described above, and may be coupled by other bolts, nuts, rivets, welding, or the like.

Further, the bent shape of the bearing par is not limited to the above-mentioned shape, and other curved wave shapes may be used.

Further, a backing made of synthetic rubber or the like may be interposed at the fitting portion between the bearing bar and the cross bar, and in this way, play between the bearing bar and the cross bar can be prevented.

[Effects of the Invention] As described above, the present invention forms the bearing bar into a corrugated shape,
The peaks and valleys of these bearing bars are arranged one on top of the other, and these peaks and valleys are interconnected. Therefore, the upper edges of these bearing bars are grid-like or mesh-like, and do not slip even on rainy days.

Furthermore, since these bearing bars are connected in a lattice-like or mesh-like manner, the bearing bars have a high strength in the direction of falling, and are structurally strong.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 shows the structure of the joint between the bearing bar and the cross bar. The exploded perspective view shown in FIG. 4 is a sectional view of the same portion. DESCRIPTION OF SYMBOLS 1... Frame member, 2... Bearing bar, 3... Cross bar 14... Insertion hole, 5... Fitting notch portion Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3 and 2 Figure 4

Claims (1)

[Claims] A plurality of bearing bars formed by bending elongated plate-like members into a corrugated shape are arranged with their peaks and valleys in contact with each other,
A grating characterized by connecting the contact parts of these bearing bars to each other.