JPH0762717A - Grating - Google Patents

Abstract

PURPOSE:To facilitate assembling work of a lattice frame which constitutes grating and reduce production cost and weight thereof. CONSTITUTION:A plurality of cut-in grooves 6 in which a main bar 1 is fitted orthogonally are formed at a predetermined interval along the longitudinal direction on a top fringe of a cross bar 2 consisting of a thin-walled longitudinal member 3a whose cross section is formed roughly in the shape of character U. The main bar 1 is fitted in the plurality of cut-in grooves 6 simultaneously by depressing the cross bar 2 downwardly from above the main bar 1 which is turned upside down and arranged at the predetermined interval to constitute a lattice frame 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grating used by being attached to a side groove or the like.

[0002]

2. Description of the Related Art In a grating a, as shown in FIG. 8, an appropriate number of long cross bars c are orthogonally crossed over a plurality of short main bars b arranged at predetermined intervals to form a grid frame d. There is a structure in which side bars e are arranged on both side edges along the longitudinal direction of the lattice frame d.

Such a conventional grating a is shown in FIG.
It is manufactured by the method shown in. First, as shown in FIG. 9 (a), each main bar b is provided with a connecting hole x and a cross bar c.
A plurality is formed corresponding to the number of. Here, the connection hole x is
The width of the cross bar c is greater than or equal to the vertical width of the cross bar c, and the vertical width thereof is less than that. Further, the stopper edges f are alternately provided above and below the center.

Further, as shown in FIG. 9B, a plurality of fitting grooves y are formed in the upper edge of the cross bar c at predetermined intervals corresponding to the number of main bars b.

Next, each main bar b is aligned at a predetermined interval by an appropriate jig, and as shown in FIG. 9C, the cross bar c is inserted sideways into each connecting hole x in a skewered shape. The fitting groove y of the cross bar c and the connecting hole x of the main bar b are opposed to each other, and then the cross bar c is rotated upward, and the side edge of the cross bar c abuts against the stopper edge f. The upper edge of each connecting hole x is fitted into.

Then, the crossbar c and the main bar b are welded to each other at the position of the connecting hole x to form a lattice frame d in which a plurality of main bars b and an appropriate number of crossbars c are orthogonal to each other. It

Next, as shown in FIG. 8, a grating a is manufactured by joining side bars e by welding to both side edges along the longitudinal direction of the lattice frame d.

[0008]

In the above-mentioned conventional grating a, it is necessary to form the connecting holes x having a complicated shape at predetermined positions of each main bar b constituting the lattice frame d. Moreover, by inserting the crossbar c into the connecting hole x of each main bar b and rotating it upward, the upper edge of the connecting hole x of each main bar b is simultaneously fitted into each fitting groove y of the crossbar c. The assembly was troublesome because it had to be done.

Further, since the square bar is used for the crossbar c, there are drawbacks such as high production cost and heavy weight of the grating a. SUMMARY OF THE INVENTION The present invention aims to solve the above-mentioned conventional problems.

[0010]

DISCLOSURE OF THE INVENTION The present invention is a grating in which a lattice frame is constituted by a plurality of main bars arranged in parallel at a predetermined interval and cross bars extending orthogonally to each main bar. , U-shaped cross section, such as a broken circle
In the upper edge of the cross bar made of thin, long-walled material, a plurality of cut grooves are formed at predetermined intervals along the longitudinal direction in which the main bar is fitted in an orthogonal shape. It is characterized in that the bars are fitted in the vertical direction and are combined in a grid shape, and further, the grid frame is configured by welding and joining the intersecting portions of the main bars and the cross bars.

Further, a brim edge extending horizontally or obliquely downward is formed at the lower edge portion of both side edges of the crossbar, or a concave groove for accommodating a non-cut portion under the cut groove is crossed. A configuration in which the main bar is formed at the lower edge corresponding to the crossing position with the bar can be selectively applied.

[0012]

After the required number of main bars are turned upside down and aligned at a predetermined interval by an appropriate jig, the crossbar is faced downward and pushed down from above so that the plurality of main bars are inserted into the cut grooves of the crossbar. The main bars of can be fitted together at the same time. As a result, the main bar and the cross bar are combined in a grid pattern, and the necessary parts can be welded together to facilitate the assembly work.

Here, if the brim is formed on the lower edges of both side edges of the crossbar, the brim and the main bar can be easily joined by spot welding from above, and the crossbar can be easily joined. When a concave groove for accommodating the non-notched part of is formed on the lower edge of the main bar, the lower edge of the crossbar does not project to the lower part of the grating, and therefore the grating is attached to the receiving frame such as the side groove. At this time, there is no problem that the longitudinal end portion is lifted or rattling.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In the drawings, 1 is a plurality of short main bars formed in a T-shaped cross section, and 2 is an appropriate number of long cross bars. The crossbar 2 is made of a thin long member 3a having a U-shaped cross section so as to have a U-shape, and the left and right end edges 4 and 4 of the crossbar 2 have brim edges 5, 4 whose lower ends are horizontally extended. 5 are provided. The crossbar 2 may be formed by bending a strip-shaped thin plate, or may be a mold member having the same cross section. On the upper edge of the cross bar 2, a plurality of cut grooves 6 into which the main bar 1 is fitted orthogonally are formed at predetermined intervals. The width of each cut groove 6 is approximately the same as the thickness of the main bar 1, and the cross bar 2
Is formed so as to reach near the lower edge of the
The lower part of is the non-cut portion 7.

The lower edge of the main bar 1 is fitted into the cut groove 6 of the cross bar 2 when the cross bar 2 is fitted.
A recessed groove 8 capable of accommodating the non-cut portion 7 of the crossbar 2 is formed at a position corresponding to the position intersecting with.

The main bar 1 and the cross bar 2 are assembled in the following procedure. First, as shown in FIG. 4, the engaging grooves 10 of the jigs 9 and 9 (one side is omitted) provided on both sides so as to be opposed to each other and provided with a space therebetween can be positioned.
Both ends of the upside down main bar 1 are fitted into each other, and a plurality of main bars 1 are held by the jigs 9 and 9 to be arranged in parallel.

Next, the crossbar 2 is pushed downward from above at a position corresponding to each concave groove 8 of the main bar 1 aligned in the orthogonal direction, and the main bar 1 is inserted into each cut groove 6 of the crossbar 2. At the same time, the main bars 1 and the crossbars 2 are assembled in a lattice shape by fitting them at the same time and accommodating the flanges 5 and 5 of the crossbars 2 in the respective groove 8.

Then, the main bar 1 and the cross bar 2 are assembled by joining the intersections of the brim edges 5, 5 of the cross bar 2 and the main bar 1 by spot welding from above the brim edges 5, 5. The lattice frame 11 is configured. Here, the main bar 1 and the cross bar 2 by the spot welding
Since the joining is only for maintaining the general shape of the lattice frame 11, it is not necessary to weld all the intersecting portions, and it is sufficient to apply the welding to several required portions.

As shown in FIG. 5, the side bars 12 are joined to both side edges of the lattice frame 11 constructed as described above after the jigs 9 are removed. Here, even when the jigs 9 and 9 are removed, the main bars 1 are held in the upright state by being fitted into the cut grooves 6 of the cross bar 2, and in this state, the main bars 1 The side bar 12 is brought into contact with the end portion, and the abutting portion is joined by gas welding or the like, so that the side bar 12 is provided at both side edges of the lattice frame 11.
Are joined together to complete the grating 13. The grating 13 is used by being turned upside down.

The brim edges 5 and 5 formed on the lower end edges of the left and right end edges 3 and 3 of the crossbar 2 are provided so that spot welding can be easily performed from above. If the side surfaces of the intersections of the main bar 1 and the cross bar 2 are joined by gas welding or the like, the brim edges 5 and 5 are not always necessary.

A concave groove 8 is formed in the lower edge of the main bar 1 to accommodate the non-cut portion 7 of the crossbar 2.
When a large number of gratings 13 are attached to a receiving frame such as a side groove in a row, the end of the grating 13 is lifted by the receiving frame that supports the longitudinal end of the grating 13 at the end of the side groove, The grating 13 is provided for the purpose of preventing a problem such as sticking, and the above-mentioned problem does not occur in the grating 13 which is attached at an intermediate position other than both ends of the side groove because only both side edges along the width direction are supported by the receiving frame. Therefore, the recessed groove 8 for accommodating the non-cut portion 7 of the crossbar 2 is not necessarily required in the main bar 1 of these gratings 13.

FIG. 6 shows a second embodiment showing the above-mentioned structure in which the brim edges 5 and 5 are not formed on the cross bar 2, and the thin long member 3b formed in a U-shaped cross section so as to have a U shape. At the upper edge, slightly shallow notched grooves 6 ′ are formed at predetermined intervals along the longitudinal direction, and the vertical width of the lower notched portion 7 ′ of the notched groove 6 ′ is set large. Further, the concave groove 8'of the main bar 1 for accommodating the non-cut portion 7 '
Is also deeply formed corresponding to the vertical width of the non-cut portion 7 '.

FIG. 7 shows a third embodiment of the crossbar 2 having a slightly different cross-sectional shape, and FIG. 7 (a) shows that the thin long member 3c is formed in a substantially U-shaped cross section having an oval shape. It
FIG. 7B shows that a thin long member 3d is formed into a U-shaped cross section having a substantially U-shaped cross-section, and the left and right end edges 4 and 4 have lower end edges extending obliquely downward. Edge 5 ', 5'
Is provided. In addition, in the concave groove 8 of the main bar 1,
Inclined surfaces 13, 13 are provided corresponding to the brim edges 5 ', 5'. When the upper edge of the crossbar 2 is curved as described above, the dust and the like attached to the upper edge can be easily washed away by the drainage flowing from the upper portion of the grating 13 into the side groove. In addition, the brim 5, which extends diagonally downward
The same effect can be obtained even with No. 5. Although not shown, the crossbar 2 may be a thin long member having a substantially U-shaped cross section, which has a V shape, a rhombus shape, or the like, other than the above.

In each of the above embodiments, the main bar 1 has a T-shaped cross section, but the present invention can also be applied to a main bar having a rectangular or inverted L-shaped cross section.

[0025]

As described above, according to the present invention, a plurality of cut grooves into which the main bar is fitted orthogonally are formed in the upper edge of the cross bar made of a thin long member formed in a substantially U-shaped cross section. The main bars are formed at predetermined intervals along the longitudinal direction, and the main bars are turned upside down and aligned at predetermined intervals. Since they are fitted at the same time, it is not necessary to separately form a connecting hole having a complicated shape in each main bar as in the conventional case, and the main bar and the cross bar can be easily assembled in a grid pattern. .

Further, since the crossbar is made of a thin long member, it has excellent effects such as reduction in production cost and weight reduction of grating, as compared with the conventional rectangular bar.

Further, if the brim is formed at the lower edges of both side edges of the crossbar, the brim and the main bar can be easily joined by spot welding from above, and the crossbar is not cut. If a concave groove for accommodating the part is formed on the lower edge of the main bar, the lower edge of the crossbar does not project to the lower part of the grating, and when the grating is attached to the receiving frame such as the side groove, the end portion in the longitudinal direction. It is possible to prevent problems such as being lifted or rattling.

[Brief description of drawings]

FIG. 1 is a perspective view showing a separated state of a main bar and a cross bar according to a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a state where the main bar and the cross bar are separated from each other.

FIG. 3 is a side sectional view showing an assembled state of the main bar and the cross bar of the above.

FIG. 4 is a perspective view showing an assembling process of the main bar and the cross bar of the same.

FIG. 5 is a bottom view of a lattice frame configured by assembling the main bar and the cross bar of the above.

FIG. 6 is a side sectional view of the assembled state of the main bar and the cross bar according to the second embodiment of the present invention.

FIG. 7 is a side sectional view showing an assembled state of a main bar and a cross bar according to a third embodiment of the present invention.

FIG. 8 is a plan view of conventional grating.

FIG. 9 is a side view of a configuration of a main part of a conventional grating and a perspective view showing an assembling method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main bar 2 Cross bar 3a-3d Thin long material 4 Left and right side edges 5,5 'Collar edge 6,6' Notch groove 7,7 'Non-notch part 8,8' Recessed groove 11 Lattice frame 12 Grating

Claims (3)

[Claims] 1. A grating having a lattice frame composed of a plurality of main bars arranged in parallel at a predetermined interval and a cross bar extending orthogonally to each main bar, wherein the grating has a U shape, a U shape, an oval shape, or the like. A plurality of cut grooves into which the main bars are fitted orthogonally are formed at predetermined intervals along the longitudinal direction at the upper edge of the cross bar made of a thin long material formed in a substantially U-shaped cross section. A grating characterized in that a main frame is fitted in each of the cut grooves from the vertical direction, combined in a lattice shape, and further, a lattice frame is configured by welding and joining the intersecting portions of each main bar and the cross bar. 2. The grating according to claim 1, wherein the crossbar is provided with a brim edge formed by extending lower end edges of left and right side edges of the crossbar horizontally or obliquely downward. 3. A recessed groove for accommodating a non-cut portion under the cut groove is formed at a lower edge of the main bar corresponding to a crossing position with a cross bar. Grating.