JP3530130B2 - Steel grate railing - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a steel balustrade installed on a road bridge or the like.

[0002]

2. Description of the Related Art Usually, a railing is installed on a road bridge or the like to prevent a vehicle such as an automobile from jumping out of the road due to an accident or the like.

Many of these balustrades are made of steel or concrete so as to withstand the collision load when a car or the like collides.

However, with the recent increase in size of vehicles, conventional specifications cannot withstand the collision load of automobiles.

By the way, in the conventional railroad tracks, 2t / m
It was said that it was sufficient to withstand a collision load of .tau., But nowadays, there is an urgent need to make it possible to withstand a collision load of 4 t / m.

FIG. 7 shows an example of a conventional steel lattice type balustrade. In this balustrade a, a plurality of lattice materials c are arranged between columns b at regular intervals, and columns b are embedded in the ground cover portion d.

[0007]

However, since the balustrade a seeks the corresponding force of the collision load in the buried portion of the ground cover portion d of the support b, it cannot be expected to have a certain strength or more. Further, the grid material c arranged between the columns b also has a small resistance against collapse when a collision occurs.

The present invention is intended to solve such problems by the means described below.

[0009]

First of all, basically, a plurality of L-shaped holes for inserting L-shaped steel columns are basically formed in a steel base plate at predetermined intervals, and the L-shaped steel columns are inserted into the L-shaped holes. Is inserted, and a protruding portion of the L-shaped steel column having a predetermined length is projected to the lower surface of the steel base plate, and a steel grid-type balustrade in which a steel top plate is integrated is formed above.

Preferably, a plurality of L-shaped holes for inserting the L-shaped steel columns are formed at both ends of the steel base plate for inserting the channel-shaped steel columns, and a plurality of L-shaped holes for inserting the L-shaped steel columns at predetermined intervals between the channel-shaped holes, Insert the channel-type steel column into the channel-type hole and the L-type steel column into the L-type hole, and place the channel-type steel column and the protruding portion of the L-type steel column on the lower surface of the steel base plate. A steel lattice type balustrade is formed on the upper side of the steel plate, which is made to protrude and is integrated with the steel top plate.

The steel lattice type balustrade thus formed is provided by embedding an L-shaped or channel-shaped protruding portion protruding from the lower surface of the steel base plate in the ground covering portion.

In the steel grid-type balustrade constructed as described above, the steel columns, which are the materials for receiving the collision load, are L-shaped, and the projecting portion projecting from the lower surface of the base plate is embedded in the ground cover. Therefore, the embedded protrusion serves as a corresponding force to resist the collision load.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an example of a member used for a steel lattice type balustrade according to the present invention. In the figure, 1 is a base plate, 2 is a top plate, 3 is a channel-type column, and 4 is an L-type column, both of which are made of steel.

The base plate 1 has a channel type hole 1a for inserting and holding a channel type column 3 described later at both ends thereof, and an L type for inserting and holding a plurality of L type columns 4 described later at regular intervals between the channel type holes 1a. The hole 1b is drilled.

The top plate 2 includes a channel type column 3 and an L type column 4.
Corresponds to a so-called head tree attached above the base plate 1 when it is inserted into the base plate 1. In this embodiment, the columns inserted into both ends of the base plate 1 are channel type, so that both ends are It is formed as an insertion portion 2a having a shape matching the inside of the channel type.

The channel type column 3 and the L type column 4 are both channel type holes 1a and L type holes 1b of the base plate 1.
Has a length necessary to be inserted into each of the above and embedded in the ground cover portion described later.

FIG. 5 shows a steel lattice type balustrade assembled by using the above-mentioned members.

Base plate 1 and channel type pillars 3, L
The mold pillars 4 refer to the channel mold pillars 1 and the L mold pillars 1b of the base plate 1, respectively.
And adjust the height so that the channel-shaped pillar 3 and the L-shaped pillar 4 are embedded in the lower surface of the base plate 1 and the protruding portions 3a and 4a of a predetermined length are projected. It is one. The projecting length is calculated as the pull-out resistance of concrete with reinforcing bars around the buried part of the ground cover. If necessary, the base plate 1 and the channel-shaped pillars 3 and the L-shaped pillars 4 are welded.

The top plate 2, the channel type pillar 3 and the L type pillar 4 are integrated by covering the channel portion of the top plate 2 with the L type pillar 4 and inserting the insertion portion 2a into the channel type pillar 3 inside the channel type. Has become. The connection portions of the top plate 2, the channel-shaped pillars 3, and the L-shaped pillars 4 are welded.

In this way, the steel lattice type balustrade 10 is formed as a whole.

Next, FIG. 6 shows a state in which the above-mentioned steel lattice type balustrade is installed in the ground cover of the road bridge deck.

The balustrade 10 formed as described above is
It will be installed as needed in the direction of the ground cover. The installation is performed by embedding the projecting portions 3a, 4a of the channel-shaped pillar 3 and the L-shaped pillar 4 projecting on the lower surface of the base plate 1 in the ground cover portion 11.

In this way, as a whole, a plurality of L-shaped holes for inserting the L-shaped steel columns are punched in the steel base plate at predetermined intervals, and the L-shaped steel columns are inserted into the L-shaped holes,
A projecting portion of the shaped steel column having a predetermined length is projected to the lower surface of the steel base plate, and a steel lattice type balustrade integrally formed with a steel top plate is formed above. Further, in such a structure, a steel lattice type balustrade in which the protruding portion on the lower surface of the steel base plate is embedded and installed in the ground covering portion is provided. In this embodiment, the steel columns on both ends of the steel base plate are of channel type, but the shape is not limited to this, and the appearance is good by doing so. Further, the top plate 2 has a channel shape, but it is needless to say that it may be a flat plate.

[0025]

As described above, the present invention has the following effects.

In Claims 1 and 2, the columns forming the lattice portion of the steel lattice type balustrade are made of L-shaped steel, and the protrusions of the L-shaped steel columns are L-shaped holes formed in the steel base plate. The L-shaped steel column resists collapse and is buried because it is configured to be embedded in the bottom cover of the steel base plate by projecting it to the lower surface of the base plate and burying it in the ground cover. The formed protruding portion serves as a corresponding force and can resist a large impact load.

In the second aspect, since the steel columns located at both ends are channel-shaped, the overall appearance is good.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a steel base plate forming a steel lattice type balustrade.

FIG. 2 is a perspective view showing an example of a steel top plate forming a steel lattice type balustrade.

FIG. 3 is a perspective view showing an example of a channel type steel column forming a steel lattice type balustrade.

FIG. 4 is a perspective view showing an example of an L-shaped steel column forming a steel lattice type balustrade.

FIG. 5 is a perspective view showing an example of a steel lattice type balustrade.

FIG. 6 is a perspective view showing an example of installation of a steel lattice type balustrade.

FIG. 7 shows a conventional example of a steel lattice type balustrade.

[Explanation of symbols]

1 Steel base plate 1a Channel type hole 1b L-shaped hole 2 steel top plate 3-channel steel column 3a protrusion 4 L-shaped steel columns 4a protrusion 10 Steel lattice type balustrade 11 Ground cover

Claims (2)

(57) [Claims] 1. A plurality of L-shaped holes for inserting L-shaped steel columns are formed in a steel base plate at predetermined intervals, and L-shaped steel columns are inserted into the L-shaped holes to define L-shaped steel columns. The protrusion of the same length is projected on the lower surface of the steel base plate, and the steel top plate is integrated upward, and the protruding portion of the L-shaped steel column projected on the lower surface of the steel base plate is embedded in the ground cover. Steel lattice type balustrade that is characterized by being installed. 2. A channel type hole into which a channel type steel column is inserted at both ends of a steel base plate, and a plurality of L type holes into which an L type steel column is inserted are formed at predetermined intervals between the channel type holes to form a channel. Channel type steel columns in the mold holes,
Insert the L-shaped steel column into the L-shaped hole, project the channel-shaped steel column and the projecting portion of the L-shaped steel column of the specified length to the lower surface of the steel base plate, and integrate the steel top plate above. A steel lattice type balustrade characterized in that the projecting portions of the channel-type steel columns and the projecting portions of the L-shaped steel columns that are projected on the lower surface of the steel base plate are installed by being embedded in the ground cover.