JPS6236921Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a concrete protective fence.

Generally, around important facilities such as nuclear power plants and airports, protective fences using block-folding structures, barbed wire, etc. are installed as a measure to prevent illegal entry by outsiders or accidents. It is being

By the way, such protective walls and fences, etc., naturally have a structure that is difficult to be easily penetrated or destroyed, due to their original purpose.
It is also necessary that the structure be easy to construct, require no effort or expense to maintain, and be convenient for early detection of illegal trespassers. These are particularly important factors in important facilities that are large-scale and have a large social impact, such as the aforementioned nuclear power plants and airports.

In this respect, there are problems that need to be solved in conventional protective walls and fences. In other words, for example, does the above-mentioned protective wall with a block folding structure have the advantage of being relatively difficult to destroy?Most of the construction work is done on-site, so it takes more time to construct it, and it is also difficult to construct it from the inside of the protective wall to the outside. The disadvantage is that it is difficult to see the situation, and protective fences using barbed wire etc.
Although it is easy to construct, it is also easily destroyed.
Therefore, there are disadvantages such as maintenance is time consuming and expensive.

The present invention was developed in consideration of the various problems mentioned above; it is a structure that is extremely difficult to penetrate or destroy, is extremely easy to construct on-site, and is illegal. The purpose is to provide a concrete protective fence with a convenient structure for early detection of intruders.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a concrete protective fence according to the present invention, and this protective fence, designated as a whole by the symbol A, consists of a large number of concrete pillars 1 of the same shape placed at intervals on the ground G to be constructed. It is constructed by erecting concrete columns 1 and connecting them to each other.

As shown in FIG. 2, the concrete column 1 includes a main column 2 as a vertical member, and a main column 2 as a vertical member having a so-called bending part 2a whose upper end is bent toward the outside of the protective fence. It mainly consists of an auxiliary support 3 as a diagonal member whose upper part is integrated with the main support 2, and a connecting bottom 4 as a horizontal member that integrally connects the lower ends of the auxiliary support 3 and the main support 2. (all of them include reinforcing bars inside), and in the illustrated example, they have a substantially right triangular frame shape with a high height when viewed from the side. Then, the connection bottom 4 as the horizontal member is grounded on the ground G, and the auxiliary support 3 is located on the inside of the protective fence (on the side of the facility to be protected), with a distance α between them. are connected to each other. This interval α is set to a level that a person cannot pass through, for example, about 100 to 200 mm. In the embodiment, as shown in FIG. Prismatic protrusions 5, 6, and 7, each serving as a so-called spacer, are formed to protrude from the intersecting corner portions.

Various methods can be considered for connecting the concrete columns 1 to each other, but in this embodiment, as shown in FIG. 8 are formed in advance, long connecting bolts 9 are inserted into these through holes 8, respectively, and then both ends are appropriately secured with nuts to connect them to each other. Here, since the protective fence A is generally quite large in scale, in the actual construction work, for example, as shown in Figure 4, the fence A must be constructed to an extent that does not interfere with transportation or work using the crane 10, etc. A plurality of concrete columns 1 are connected with long connecting bolts and nuts to form one block A' within the range of It is preferable to adopt a method in which the members are bonded together, for example, via a coupler.

By the way, if the ground G on which this protective fence A is to be constructed has undulations or slopes, and therefore it becomes necessary to provide a step in a part of the protective fence A, as shown in For example, if a method is adopted in which the ends of the connecting bolts 9 are connected with a nut 12 via a plate-shaped connecting fitting 11 having a long hole on one side, and the surrounding area is hardened and protected with concrete 13 cast on site. good. Here, it is more effective to protect the nut 12 by using a cylindrical connecting fitting 14 as shown in FIG. 6.

In the protective fence constructed in this way according to the present invention, the interval α between each concrete pillar 1 is sufficiently narrow that a person cannot pass through, and each main pillar 2
are located on the outside, and the auxiliary support 3 is also located on the inside, making it a so-called two-tiered structure.For example, a person attempting to enter the building could use a hammer or the like to temporarily attack the main support 2 on the outside. Even if one of them is destroyed, the next stage of support, auxiliary support 3, will be destroyed.
It would be extremely difficult to destroy it and get inside. In other words, even if about one main column 2 is destroyed, the distance between the main columns 2 will still be sufficiently narrow.
For this reason, raise the hammer etc. and move to the next auxiliary column 3.
This is because it is difficult to destroy the main support 2, and therefore it becomes necessary to break several main supports 2. In addition, the protective fence has the advantage of allowing early detection of such intruders because it has a structure that allows the inside and outside to be seen through. Also, when looking at this protective fence from the perspective of construction work, concrete pillars 1 are installed at the site.
Since the books can be constructed one by one or by sequentially erecting them in blocks as shown in the figure and connecting them, the work on site is extremely simple and efficient.

In the embodiment, the concrete column 1 has a substantially right-angled triangular shape, but basically any shape including the auxiliary column 3 may be used, and the protrusions 5, 6, and 7 as spacers may have the shape of the illustrated example. As shown, the protrusions may be formed not only on one side but also on both sides with half the amount of protrusion, and the invention is not limited to the above embodiment.

As detailed above, the protective fence according to the present invention is
It is a structure that is very difficult to enter or destroy, is extremely easy to construct on-site, and has various excellent effects such as being convenient for early detection of illegal trespassers. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a protective fence according to an embodiment of the present invention, FIGS. 2 and 3 are right side views and perspective views of a concrete column according to the same embodiment, and FIG. 4 is an explanatory diagram showing the work procedure. FIGS. 5 and 6 are schematic diagrams showing a method of connecting connecting bolts. 1...Concrete pillar, 2...Main pillar, 2a...
...Shinobigaeshi, 3...Auxiliary strut, 4...Connection bottom, 5, 6, 7...Protrusion, 8...Through hole, 9...
Connection bolt, A...protective fence.

Claims (1)

[Scope of utility model registration request] In a concrete protection fence constructed by erecting a large number of concrete columns of the same structure at intervals and connecting these concrete columns to each other, the upper ends of the concrete columns are bent to the outside of the protection fence. It consists of a main column with a bend, and an auxiliary column that is partially integrated with the main column and located inside the protective fence, and the spacing between the concrete columns is such that a person cannot pass through. A concrete protective fence characterized by its dimensions being set to zero.