JP2521870B2 - Grating - Google Patents

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 gutter on a road, a transverse groove, a groove cover such as a water collecting port, and the like.

[0002]

2. Description of the Related Art Gratings are constructed so as to cover the openings of gutters, crossing grooves, water intakes, etc. on roads so as to ensure both the safety of automobiles and pedestrians and the smooth inflow of rainwater. .

The conventional grating is a so-called slit type, in which a plurality of strip steel main bars are arranged in parallel in the depth direction at predetermined intervals, and a cross bar made of twisted steel bar or the like is arranged in a direction orthogonal to the main bars. It is generally manufactured by arranging at regular intervals, assembling and forming in a grid shape by heating and pressure welding by the electric pressure welding method, cutting the main bar to fit the predetermined groove width dimension, and welding the side plate to the cut surface. It was

However, in order to manufacture the above-mentioned conventional grating, a machine space sufficient for arranging a plurality of long main bars made of strip steel in parallel is required, and the main bar is pressed against the crossbar. Large power receiving facility
Since it requires equipment , electric pressure welding equipment, and a large cutting equipment for cutting a panel to a predetermined size, it requires a large amount of equipment investment and a large number of workers, and also requires a large amount of electricity.
Electric energy is used because it uses a large instantaneous power when contacting with atmospheric pressure.
Is very uneconomical, and the power supply side is high.
Within the specified range of the substation on the power transmission side to cause harmonic interference
If you do not carefully consider the surrounding area conditions, you can operate
Absent.

Further, cutting of the panel and cutting of the ear are inevitable, and noise and dust at the time of cutting are extremely intense, and there is a danger of hearing loss for workers, which is a factor of deteriorating the environment at the work site.

[0006] In addition, in the conventional grating itself, the cross bar is pressure-bonded to the main bar by electric heating, but it is difficult to secure sufficient bonding strength, and due to lack of rigidity, it is flattened due to overload. Distortion easily occurs due to the load , and the crossbar is supported only on the tread.
Therefore, there are various problems such as correction work of the distortion in the manufacturing process is extremely difficult.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been devised to solve the above-mentioned problems in conventional gratings, and is intended for use in bending machines under small-scale equipment.
It can be easily manufactured by plastic working and eliminates panel cutting and ear cutting cutting work, which prevents noise and dust from occurring and improves the working environment, and also imparts excellent rigidity to the grating itself. Is possible,
It is an object of the present invention to provide a grating having a novel structure capable of reducing the manufacturing cost.

[0008]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. A strip of metal such as a strip of steel will be described in the width direction. straight section 1 and a skew portion 5 in the width direction crossing straight, the straight line portion of the side edge of the short linear portions 6 by combining short straight portions 6
Sequentially formed continuously bent in a single stroke shape both the bent wire portion 3 capable of forming a contact with the contact 7 through the folded portions 2 and 4 of the side edges to abut alternately 1, and the straight portion 1 A short straight line in the bending line portion 3 by welding each contact 7 with the bending line portion 3
The parts 6 are arranged and connected on the same line .

[0009]

In the grating having the above-described structure according to the present invention, the straight line portion 1 and the bent line portion 3 forming the contact 7 abutting the straight line portion 1 are formed by using a strip of metal such as a strip of steel. It is formed by sequentially bending and forming in one stroke , and each contact 7 is welded and joined. The whole grating body is formed by bending from a single metal strip plate , and the straight line portion 1 is a beam. And welding the contact 7 to shorten the bent line portion 3.
The linear portions 6 are arranged and connected in a straight line, respectively, and play the role of a girder.
I a whole since it forms a honeycomb-like structure, a cross bar consisting of extremely excellent rigidity, thickness of the strip material than the conventional one with can be thinned substantially around 5%, such as torsion bars in a conventional be a made material and unnecessary
And the oblique portion 5 of the bent line portion 3 has a high anti-slip action.
Promote.

Further, by appropriately adjusting and setting the distance between the linear portions 1 such that the inner side edge is narrower than the outer side edge, various arc shapes or curvatures having different curvatures can be obtained. Gratings of various shapes such as S-shape can be obtained very easily.

Further, the bending work of the metal strip-shaped plate for continuously bending the linear strip 1 and the bent line portion 3 in a single stroke in a continuous bending process under a small-scale facility. Can be done very easily by using a bending machine, and the panel cutting and cutting, which have been inevitable in the past, have been performed .
It is possible to eliminate the need for cutting off the edges of the extra bars .

[0012]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. In FIG. 1, a strip-shaped metal plate such as a single strip of steel (including flat steel and I-shaped steel) is first used in the width direction. A straight line portion 1 that extends linearly is formed, and a side end portion of the straight line portion 1 is continuous with a bent line portion 3 having a zigzag shape through a folded portion 2, and the bent line portion 3 is formed on the other side corresponding to the side edge. It continues to the next straight line portion 1 that linearly extends in the width direction at a predetermined interval through the folded-back portion 4 at the side edge, and thus both the straight line portion 1 and the bent line portion 3 are continuous. Then, the grating body is formed by alternately repeating and continuously bending in a single stroke.

The bent line portion 3 is provided with a contact portion 7 which is in contact with the linear portion 1 by forming a diagonal portion 5 from the folded portion 2 and subsequently a short linear portion 6 in a direction transverse to the width direction. After that, a contact point 7 is further provided with a slant portion 5 and a short straight portion 6, and a zigzag shape from the slant portion 5 to the folded portion 4 on the other side is formed. The contact point 7 with the bent line portion 3 is welded from both front and back sides to be firmly connected.

The number of contact points 7 between the straight line portion 1 and the bent line portion 3 is
Combination of the skewed portion 5 and the short straight portion 6 in the bent line portion 3
It corresponds to the margin and can be set arbitrarily.
However, each contact point 7 between the straight line portion 1 and the bent line portion 3 is
If the short straight line portions 6 in are arranged and connected on the same line,
Therefore, can each welding method be applied to each contact 7?
Power consumption is a fraction of that of the conventional electric pressure welding method.
It can be a reliable joint.

If necessary, side plates 8 and 9 made of an I-shaped section or L-shaped steel as shown in FIG. 2 are welded to both side surfaces of the folded-back portions 2 and 4 at both end edges.

Here, as shown in the embodiment of FIG. 3, a single metal strip-shaped plate is continuously extended as a side frame portion 10 including both side plates 8 and 9 in the above-mentioned embodiment in a one-stroke form. It is also possible and included in the present invention.

FIG . 4 is an embodiment showing a grating formed by bending in an arc shape, in which the inner side edge is compared with the outer side edge by appropriately adjusting and setting the interval between the linear portions 1. It can be obtained very easily by narrowing the dimensions.

[0018]

The grating of the present invention is as described above, and a strip of metal strip is continuously bent into a single stroke.
Bending for small-scale equipment that is molded
It can be manufactured easily and economically with a casting machine. Ma
In addition, the straight line portion 1 functions as a beam and the short straight line in the bending line portion 3
The parts 6 are arranged and connected in a straight line, respectively, and each has a function of a girder.
Since it has a honeycomb structure as a whole, it is extremely rigid
It is excellent in anti-slip as the slanting part 5 is high.
I do. In addition, cutting the panel and cutting off the edges of the crossbar are not required, eliminating the need for noise and dust collection measures.
It can contribute to improving the environment of dangerous labor workplaces . In addition, various types of gratings, such as arc-shaped or S-shaped, can be easily manufactured, which are suitable for various purposes .
It has an excellent effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment.

FIG. 2 is a partial perspective view showing a second embodiment.

FIG. 3 is a perspective view showing a third embodiment.

FIG. 4 is a partial plan view showing a fourth embodiment.

[Explanation of symbols]

 1 Straight part 2 Folded part 3 Bent line part 4 Folded part 5 Diagonal part 6 Short straight part 7 Contact point 8 Side plate 9 Side plate 10 Side frame part 11 Straight part

Claims (1)

(57) [Claims] 1. A straight part 1 that crosses a strip of metal such as a strip of steel in a straight line in the width direction and a skewed portion 5 in the width direction.
By combining the short straight line portions 6, the side ends of the short straight line portions 6 are directly connected to each other.
The bent portion 3 which can form the contact 7 that contacts the line portion 1 is continuously bent in a one-stroke writing manner through the folded-back portions 2 and 4 at the side ends so as to be alternately adjacent to each other, and the linear portion is formed. 1 and the contact points 7 of the bending line portion 3 are welded to each other to shorten the bending line portion 3.
A grating characterized in that straight line portions 6 are arranged and connected on the same line .