JPH05287795A - Grating - Google Patents

Abstract

PURPOSE:To raise the strength of grating as well as make the manufacture of grating easier by a method in which main bars are fitted into the holding grooves formed at a given interval of a U-shaped bent plate band in a cross bar. CONSTITUTION:Slit holes 6 are formed by punching at a given interval in the central part of a banded plate 5, and the plate 5 is bent into a U-shaped or circular form to form a cross bar 4. Main bars 3 of a flat plate are fitted into the holes 6 and fixed by welding as needed. A grating having improved strength and rigidity and simple structure can thus be easily obtained, and the lowering of the strength can also be prevented due to having no holes in the main bar.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating used for a drain groove lid and the like. More specifically, the present invention relates to a crossbar structure and a grating having an improved joint structure between the crossbar and the main bar.

[0002]

2. Description of the Related Art Generally, a grating is arranged in parallel with a plurality of main bars for supporting a load, and is arranged so as to intersect these main bars, and holds these main bars at predetermined intervals and positions. And a crossbar for.

Conventionally, there is one in which these main bar and cross bar are joined by welding. However, in the case of such a product, it is necessary to weld a large number of points at the time of manufacture, and the manufacture is troublesome.

There is also a structure in which the main bar and the cross bar are joined by fitting. As an example of such a grating, a fitting hole having a predetermined shape is formed in the main bar, and a crossbar having notches formed at predetermined intervals is inserted into the fitting hole, and then the crossbar is rotated, for example. For example, there is one in which the cutout portion is fitted into the fitting hole of the main bar by means such as the above, and these are fitted and joined.

However, in such a structure, a fitting hole must be formed in the main bar, and the strength of the main bar is reduced. Further, this main bar is formed of, for example, a stainless steel plate having a thickness of several mm. However, if the fitting holes are formed by punching in such a large number of relatively thick main bars, the punching tool will be greatly worn, resulting in cost reduction. There is a problem that rises.

[0006]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and provides a grating that is structurally strong, has a simple structure, and can be manufactured at low cost. ..

[0007]

The grating of the present invention uses, as its crossbar, a member obtained by bending a strip material into a predetermined mold section. Further, holding grooves are formed at predetermined intervals on the crossbar, and the main bars are fitted and joined to the holding grooves, respectively.

According to this preferred embodiment, a strip-shaped punching hole is formed in the central portion of the strip plate material forming the crossbar along the direction orthogonal to the longitudinal direction of the strip plate material. A central portion of the plate material is bent in a U shape, and a crossbar having a U-shaped cross section is formed as a whole. Therefore, the elongated punched holes formed in the central portion of the strip plate material, that is, the portion bent in the U-shape, are notched, and these are formed in the holding grooves, and the main bars are fitted into these holding grooves. To be done.

[0009]

The grating of the present invention has a large strength because the cross bar has a shape like a mold material in which the strip plate material is bent in a predetermined cross section. Further, since the main bar is fitted and held in the holding groove formed in such a cross bar, it is not necessary to form a fitting hole or the like in this main bar, and the strength of this main bar is reduced. There is nothing to do.

Further, this cross bar is one in which punching holes or notches are formed in the strip plate material at a predetermined interval and the strip material is bent into a U-shaped cross section, and the manufacture thereof is easy and the cost is low.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment, which is a stainless steel grating used for a drain groove lid and the like. Reference numeral 1 in the drawing is a grating, and this grating 1 is a frame member 2 made of an angle member, a plurality of main bars 3 and a cross that is arranged so as to intersect these main bars and that holds these main bars at predetermined intervals. It is composed of a bar 4 and.

The main bars 3 are made of a stainless steel flat plate material and are arranged in parallel with each other at predetermined intervals, and both ends thereof are connected to the frame member 2. The crossbar 4 is constructed as shown in FIG.

That is, the crossbar 4 is formed by bending a strip plate material 5 such as a stainless steel plate into a substantially U-shape at its central portion so as to have an inverted U-shaped cross section as a whole. Before bending the strip plate material 5, a plurality of slit-shaped punched holes 6 are formed at predetermined intervals in the center portion of the strip plate material 5, as shown in FIG. Has been done. The punched holes 6 are formed such that their width is slightly smaller than the plate thickness of the main bar 3 and are formed along the direction orthogonal to the longitudinal direction of the strip plate member 5. Further, a cutout portion 7 having a depth substantially equal to the width of the punched hole 6 is formed at an end portion of the strip plate member 5.

Therefore, by bending the strip plate member 5 in a U-shape at its central portion, the punching holes 6 are located in the U-shaped bent portion as shown in FIG.
These slit-shaped punched holes 6 are formed in a notch shape. Further, the cutout portion 7 also corresponds to this U-shaped bent portion and is formed in a shape like a fitting step portion as shown in FIG.

The main bar 3 is fitted and held in each of the notched punched holes 6, and if necessary, both ends of the punched holes 6, that is, the bottoms of the notched punched holes. And the lower surface of the main bar 3 are welded. Further, the main bar 3 at the outermost end is fitted and welded to the cut-out portion 7 having the above-mentioned fitting step shape.

In the first embodiment of the present invention configured as described above, since the main bar 3 is fitted and held in the notched punched hole 6 of the cross bar 4, the assembly of this grating is performed. Is easy and the manufacturing cost is reduced. Further, it is not necessary to form a fitting hole, a cutout or the like for fitting the main bar 3 with the cross bar 4,
The strength of these main bars 3 does not decrease, and they are easy to manufacture.

Further, since the crossbar 4 has a channel shape having a U-shaped cross section, its strength and rigidity are high. Further, when the main bar 3 is fitted and held in the punched holes 6 formed in the respective cutouts, the main bar 3 is fitted and held in two places, so that the holding is ensured.

Further, FIG. 5 and FIG. 6 show the second embodiment of the present invention.
3 shows a grating crossbar 14 of the embodiment of FIG. As shown in FIG. 6, when the punching hole 16 is formed in the central portion of the strip plate member 15, tongue pieces 18 are formed at both ends of the punching hole 16, as shown in FIG. The strip plate member 15 is bent into a substantially U-shape at its central portion as in the case of the first embodiment. At this time, or when the punching holes 16 are punched out, the tongue is removed. The pieces 18 are bent and raised so that the tongues 18 face each other inwardly as shown in FIG. The crossbar 14 has the above-mentioned first
Even when the cutout portion formed at the end portion of the crossbar of the embodiment is formed with the same cutout portion, the tongue pieces similar to the above may be formed at both end portions of the cutout portion.

In this embodiment, similarly to the first embodiment, the main bar is fitted and held in the punched hole 16 formed in the notch shape. Then, if necessary, the tip of the tongue piece 18 and the lower surface of the main bar are welded.

7 and 8 show a third embodiment of the present invention. In this case, the tongue piece 19 is cut and raised outward. Except for the above points, this third embodiment has the same configuration as that of the second embodiment, and in FIGS. 7 and 8, parts corresponding to the second embodiment are given the same reference numerals. However, the description is omitted.

FIG. 9 shows a grating crossbar 24 according to a fourth embodiment of the present invention. In this product, notches 26 are formed on both side edges of the strip 25, and cutouts 27 are formed on both ends of the strip 25 at the end, if necessary. It is a bent one. As shown in FIG. 9, this product has a main bar fitted and held in each notch 26 and cutout 27 with its back portion bent in a U-shape facing down. A drain hole 28 for drainage is formed in the back portion bent in the U shape.

FIG. 10 shows a grating crossbar 34 according to a fifth embodiment of the present invention. This is one in which slit-shaped punched holes 36 are formed at a predetermined interval in the central portion of the strip plate material 35, and the strip plate material 35 is bent in a circular cross section. Further, on the lower surface of the crossbar 34 having a circular cross section, slits 38 are formed between both edge portions of the strip-shaped member 35 to form a drain for drainage. The side edges of the strip 35 may be welded to each other so that the gloss bar 34 has a perfect tubular shape, which improves strength and rigidity.

Further, FIGS. 11 and 12 show a sixth embodiment of the present invention. In this embodiment, a grating is provided with a panel in the center and main bars on both sides. That is, the grating 41 has frame members 42 arranged at both ends thereof, and a decorative panel 34 made of a material such as tile or concrete is provided in the center. Further, a plurality of, for example, three main bars 44 are arranged in parallel with each other on both sides of the decorative panel 34.

A support member 46 is arranged at the lower edge of the decorative panel 43, and the decorative panel 43 is provided.
All the loads acting on the main bar 44 and the like are supported by the support member 46. Further, crossbars 45 project from both sides of the support member 46, and the mainbars 44 are held at predetermined intervals by these crossbars 45. These crossbars 45 have the same structure as, for example, the crossbar of the first embodiment.

In such an embodiment, the decorative panel 43 is arranged in the central portion, so that the appearance is good,
Further, the drainage passes between the main bars 44 on both sides and flows into a drainage groove or the like. In addition, since the decorative panel 43 is supported by the edge of the drainage groove or the like via the support member 46, this is stable. Further, in this structure, the crossbar 45 is provided in a cantilever shape so as to project from both sides of the support member 46. The crossbar 45 has a U-shaped cross section as in the first embodiment described above. Therefore, its strength and rigidity are high, and even such a cantilever shape has sufficient strength and rigidity. The present invention is not limited to the above embodiment. For example, the cross-sectional shape of the crossbar is not limited to the U-shape, the circular shape, etc., but may be other shapes.

[0026]

As described above, according to the present invention, since the band-shaped member is bent and formed into a predetermined sectional shape, the crossbar has high strength and rigidity. Further, since the slit-shaped notch is formed in this crossbar and the main bar is fitted therein, the structure is simple and the manufacturing is easy, and it is necessary to form a fitting hole or the like in the main bar. Since it does not exist, there is an effect that the strength of the main bar does not decrease.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view showing the structure of a crossbar.

FIG. 4 is a plan view of a strip-shaped material that constitutes a crossbar.

FIG. 5 is a perspective view of a crossbar according to a second embodiment.

FIG. 6 is a plan view of a strip-shaped material forming the crossbar of FIG.

FIG. 7 is a perspective view of a crossbar according to a third embodiment.

FIG. 8 is a plan view of a strip-shaped material forming the crossbar of FIG.

FIG. 9 is a perspective view of a crossbar according to a fourth embodiment.

FIG. 10 is a perspective view of a crossbar according to a fifth embodiment.

FIG. 11 is a plan view of the grating according to the sixth embodiment.

12 is a cross-sectional view taken along line 12-12 of FIG.

[Explanation of symbols]

 3 ... Main bar 4 ... Cross bar 5 ... Strip material 6 ... Punching hole 14 ... Cross bar 15 ... Strip material 16 ... Punching hole 24 ... Cross bar 25 ... Strip material 26 ... Notch 34 ... Cross bar 35 ... Strip material 36 ... Punched hole

Claims (4)

[Claims] 1. A plurality of main bars and a cross bar which is provided so as to intersect with the main bars and which holds the main bars at predetermined positions, wherein the cross bars have a predetermined strip plate material. It is formed by bending so as to have a mold cross section, holding grooves are formed at predetermined intervals in the crossbar, and the main bar is fitted and held in these holding grooves. Grating. 2. The crossbar is formed by bending a strip-shaped plate material having an elongated punched hole along a direction orthogonal to the longitudinal direction at a central portion thereof into a U-shape at the central portion, 2. The grating according to claim 1, wherein the punching hole is the holding groove. 3. The crossbar bends a strip plate material having an elongated punched hole formed in a central portion in a direction orthogonal to the longitudinal direction into a circular cross section, and the punched hole in the central portion is formed into the above-mentioned shape. The grating according to claim 1, which is a holding groove. 4. The crossbar is characterized in that a band plate material having a plurality of notches formed on both side edges is bent into a U shape, and these notches serve as the holding grooves. Grating.