JP3495729B2 - Wire mesh unit for landslide prevention - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landslide prevention wire netting, and more particularly to a landslide prevention wire netting for preventing landslides on a slope by receiving and hardening concrete.

[0002]

2. Description of the Related Art Concrete may be laid on steep slopes of mountains to prevent landslides. FIG. 1 shows a state where concrete is laid on the slope of a mountain. Generally, for the purpose of securing the strength of concrete 30,
The surface of the concrete 30 has an uneven shape having a concave portion 30b and a convex portion 30a.

In order to make the concrete 30 uneven as described above, a wire mesh is embedded in the convex portion 30a of the concrete 30.

FIG. 2 shows a wire mesh embedded in concrete 30. As shown, a pair of wire nets 11
0 and 110 are arranged vertically and horizontally at a predetermined interval. The entire structure of the pair of wire meshes 110, 110 is made by combining a large number of wire mesh units 10 as shown in FIG.

As shown in FIG. 3, the landslide prevention wire mesh unit 10 is located between the first wire mesh 1, the second wire mesh 2 and the wire meshes 1 and 2 and keeps a constant space between the wire meshes. The connector 20 and the reinforcing bar 4 shown in FIG. 4 are provided. The first and second wire nets 1 and 2 are typically crimp wire nets.

As shown in FIGS. 3 and 4, the net connector 20 includes an upper horizontal bar 21, a lower horizontal bar 22, and a left vertical bar 23.
And a right vertical bar 24. The upper and lower horizontal bars 21 and 22 are metal bars, and both ends thereof have the first and second wire nets 1 and 2.
It is connected to 2. The left and right vertical bars 23, 24 are also metal bars, and are arranged so as to intersect the upper and lower horizontal bars 21, 22. The horizontal rods 21 and 22 and the vertical rods 23 and 24 are welded at their intersections so that their positional relationship is fixed.

The net connector 2 shown in FIGS. 3 and 4.
0 has two parallel horizontal bars 21 and 22 and two parallel vertical bars 23 and 24, but two parallel horizontal bars and one vertical bar intersecting them. Some consist of and.

The landslide prevention wire mesh unit 10 is shown in FIG.
As shown in, a plurality of net connectors 20 are arranged at predetermined intervals. In order to strengthen the structure of the wire netting unit 10, the reinforcing bars 3 are arranged at the intersections of the horizontal bars 21 and 22 and the vertical bars 23 and 24. Rebar 3 is a plurality of net connectors 2
It extends so as to connect 0, that is, in the direction perpendicular to the paper surface in FIG.

In the structure shown in FIG. 4, four reinforcing bars are used, but they are fixed in the following manner.
First, two lower reinforcing bars 3 are installed on the slope. Next, the wire mesh unit 10 shown in FIG. 3 is placed on the two lower reinforcing bars 3. Next, the lower reinforcing bar 3 is lifted up and positioned at the intersection of the horizontal bar 22 and the vertical bars 23, 24, and the reinforcing bar 3 and the intersection are wound and fixed with a thin wire 4 at that position. Next, the upper reinforcing bar 3 is positioned at the intersection of the horizontal bar 21 and the vertical bars 23, 24, and the reinforcing bar 3 and the intersecting part are wound and fixed at that position by a thin wire 4.

[0010]

In the conventional landslide prevention wire mesh unit 10, the thin wire 4 is used to fix the reinforcing bar 3 around the intersection. In the case of the net connector 20 having the shape shown in FIG. 4, one net connector 20 has to be wound four times. The wire mesh unit 10 includes a plurality of net connectors 20.
Therefore, the number of times of winding the reinforcing bar 3 around one wire net unit 10 is very large.

Further, since the above-mentioned winding work is performed on a steep slope, if the winding force is weak, there is a risk that the reinforcing bar will slip down. Therefore, careful and reliable winding work is required. The above winding work is very complicated for the operator. Moreover, since a lot of working time is required, the construction period is prolonged as a result.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a landslide preventing wire mesh unit capable of easily fixing a reinforcing bar in a short time. It is to be.

Another object of the present invention is to provide a landslide prevention wire mesh capable of firmly fixing reinforcing bars.

[0014]

MEANS FOR SOLVING THE PROBLEMS A landslide prevention wire net according to the present invention comprises, as prerequisites, first and second wire nets, a net connector, and a reinforcing bar. The net connector is located between the first and second wire meshes and keeps the distance between both wire meshes constant, and a horizontal bar whose both ends are connected to the first and second wire meshes and a horizontal bar And a vertical bar fixed to the horizontal bar at the intersection. The reinforcing bar extends between the first and second wire nets while being connected to the intersection of the horizontal bar and the vertical bar.

In the above-mentioned landslide prevention wire net, the features of the present invention are as follows. The vertical bar has a bent portion that elastically receives and holds the reinforcing bar. The bent part of the vertical bar is in the same direction as the horizontal bar extends.
Of the outwardly extending portion and the outwardly extending portion
Inwardly extending from the tip toward the intersection
Including a projecting portion. The inwardly projecting portion has an engaging contact portion that contacts the reinforcing bar and presses the reinforcing bar toward the intersection. The distance between the engaging contact portion and the horizontal bar and the distance between the engaging contact portion and the vertical bar are smaller than the diameter of the reinforcing bar.

According to the above structure, the work of fixing the reinforcing bar can be performed very easily and in a short time. That is, the work of fixing the reinforcing bar is completed only by allowing the bending portion of the vertical bar exhibiting elasticity to receive the reinforcing bar. Moreover, since the engaging contact portion presses and fixes the reinforcing bar toward the intersection of the horizontal bar and the vertical bar, the fixing structure of the reinforcing bar is strong. Furthermore, since the distance between the engaging abutting portion and the horizontal bar and the distance between the engaging abutting portion and the vertical bar are smaller than the diameter of the reinforcing bar, it is possible to prevent the positional displacement of the reinforcing bar in the horizontal and vertical directions. You can

Further , the bent portion of the vertical bar has an outwardly projecting portion which projects and extends in the same direction as the lateral bar extends.
An inwardly extending portion, which includes an inwardly extending portion that is bent and extends from the tip of the outwardly extending portion toward the intersection.
Since There has engagement abutments if Yuke closer toward the intersection along the rebar bars, of the outwardly projecting portion and inwardly projecting portion by pushing force of the reinforcing bars at least One of them can bend and the rebar can be smoothly guided to the intersection.

Landslide with the above prerequisites
The wire mesh for prevention may be configured as follows. Vertical bar
Has a bend that elastically accepts and holds the rebar
It has a rib. The ends of the vertical bars are bent to form the bent portions . The tip of the vertical bar touches the rebar
An engaging contact portion is formed to press the reinforcing bar toward the intersection . The distance between the engaging contact portion and the horizontal bar, and the engagement
The distance between the mating contact portion and the vertical bar is smaller than the diameter of the reinforcing bar.
With this configuration, the tip end of the vertical bar serving as the engaging contact portion abuts and engages with the outer surface of the reinforcing bar in a wedge shape, so that the reinforcing bar is more firmly fixed. In particular, since the positional displacement of the reinforcing bar in the length direction can be prevented, the work on the slope can be efficiently performed.

In one embodiment, the horizontal bars include an upper horizontal bar located above and a lower horizontal bar located below. The upper end portion of the vertical bar is located above the upper horizontal bar to form the above-mentioned bent portion, and the lower end portion of the vertical bar is located below the lower horizontal bar to form the same bent portion. The reinforcing bars include upper reinforcing bars and lower reinforcing bars, the upper reinforcing bars being held by the bent portions at the upper end portions of the vertical bars, and the lower reinforcing bars being held by the bending portions at the lower end portions of the vertical bars.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 5 shows a main part of an embodiment of the present invention. As shown in the figure, the landslide prevention wire mesh unit 50 includes a first wire mesh 51, a second wire mesh 52, a net connector 40, and a reinforcing bar 57, like the conventional unit 10 shown in FIG. Net connector 40
Has an upper horizontal bar 43, a lower horizontal bar 44, a left vertical bar 45, and a right vertical bar 46. Both ends of the upper and lower horizontal bars 43, 44 are first
And is connected to the second wire nets 51 and 52. Horizontal bar 4
The positional relationship between the rods 3, 44 and the vertical rods 45, 46 is fixed by welding them at their intersections.

The wire mesh unit 50 of FIG. 5 differs from the wire mesh unit 10 of FIG. 4 in the fixing structure of the reinforcing bars 57. As shown in FIG. 5, the upper and lower ends of the left vertical bar 45 are bent, and the reinforcing bars 57 are received and held in the bent portions. Similarly, the upper and lower end portions of the right vertical bar 46 are bent, and the reinforcing bar 57 is received and held in this bent portion.

Although four folds are observed in FIG. 5, since they have substantially the same structure, one fold is shown in FIGS. 6 to 9 as a representative example. With reference to these figures, the specific structure and operation of the bent portion of the vertical bar 45 will be described.

As shown in FIG. 6, the bent portion of the vertical bar 45 is in contact with the reinforcing bar 57 and presses the reinforcing bar 57 toward the intersection of the horizontal bar 43 and the vertical bar 45. Parts. More specifically, the upper end portion of the vertical bar 45 has an outwardly extending portion 45a extending and extending in the same direction as the extending direction of the horizontal rod 43, and the outwardly extending portion 45a.
Has an inwardly extending portion 45b that extends from the tip of the above toward the intersection of the horizontal bar 43 and the vertical bar 45.

The tip of the inwardly projecting portion 45b, that is, the tip of the vertical bar 45 forms an engaging contact portion that contacts the outer surface of the reinforcing bar 57 in a wedge shape. Since the vertical bar 45 is a metal bar, it is elastically deformed when a force greater than a predetermined value is applied. Also,
In the deformed state, it exerts an elastic restoring force for returning to the original shape. The tip of the vertical bar 45 forming the engaging contact portion is
By this elastic restoring force, the reinforcing bars 57 are pressed toward the intersection and fixed so as not to be displaced.

FIG. 7 shows a state before the reinforcing bar 57 is fitted into the bent portion of the vertical bar 45. The diameter of the reinforcing bar 57 is d, the distance between the engaging contact portion (tip) of the vertical rod 45 and the horizontal rod 43 is H, and the distance between the engaging contact portion (tip) of the vertical rod 45 and the vertical rod 45 is L. Then, it is important to satisfy the following dimensional relationship in order to firmly fix the reinforcing bar.

H <d L <d Further, in order to easily guide the reinforcing bar 57 into the bent portion, it is preferable to satisfy the following dimensional relationship.

H> d / 2 L> d / 2 When the rebar 57 is brought closer to the intersection of the horizontal bar 43 and the vertical bar 45 from the state shown in FIG. 7, the rebar 47 first comes to the inwardly projecting portion 45b. Abut. Since the inward protruding portion 45b extends obliquely downward toward the intersection, the reinforcing bar 57
When a pushing force in the horizontal direction is received from the rebar 57, the bent portion of the vertical bar 45 is deformed in the direction indicated by an arrow F in FIG.
To facilitate acceptance within the fold. At this time, one or both of the outwardly extending portion 45a and the inwardly extending portion 45b elastically bends.

When the reinforcing bar 57 is moved closer to the intersection from the state shown in FIG. 8, the maximum diameter portion of the reinforcing bar 57 passes through the tip (engaging contact portion) of the vertical bar 45 as shown in FIG. . In the state shown in FIG. 8, the inwardly extending portion 45b exerts an elastic restoring force for returning to the original shape as shown by an arrow R. Due to this restoring force, the tip of the vertical bar 45 abuts and engages with the outer surface of the reinforcing bar 57 in a wedge-like strong force, and strongly presses the reinforcing bar 57 toward the intersecting portion.

As shown in FIG. 9, the reinforcing bar 57 has a horizontal bar 4
Since the force f1 that is pressed toward 3 and the force f2 that is pressed toward the vertical bar 45 are acting, the vertical displacement and the horizontal displacement of the reinforcing bar 57 do not occur. Further, since the engaging contact portion at the tip of the vertical bar 45 engages with the outer surface of the reinforcing bar 57 in a wedge shape, the axial direction of the reinforcing bar 57 (see FIG. 9).
Position deviation in the direction orthogonal to the paper surface) does not occur.

As is apparent from the above description, according to the embodiment of the present invention, the work of fixing the reinforcing bar 57 can be performed only by moving the reinforcing bar 57 so as to approach the intersection of the horizontal bar 43 and the vertical bar 45. Complete. This work is very simple and can be completed in a short time as compared with the conventional winding work using a wire.

6 to 9 show the structure of the intersection of the upper horizontal bar 43 and the left vertical bar 45. The structure substantially the same as this structure is similar to the lower horizontal bar 44 and the left vertical bar 45. Is also applied to the intersection of the upper horizontal bar 43 and the right vertical bar 46, and the intersection of the lower horizontal bar 44 and the right vertical bar 46 (see FIG. 5).

The distance H between the engaging contact portion and the horizontal bar and the distance L between the engaging contact portion and the vertical bar may be appropriately changed according to the diameter d of the reinforcing bar used. . Alternatively,
The bending angles of the outwardly extending portion 45a and the inwardly extending portion 45b may be changed.

In the illustrated embodiment, the net connector 4
0 was provided with two parallel horizontal bars and two parallel vertical bars, but as a modification, it is composed of two parallel horizontal bars and one vertical bar. It may be one.

In a preferred embodiment, the end of the vertical bar is bent to form a bent portion, and this bent portion has an outwardly extending portion and an inwardly extending portion. As a modified example, the end portion of the vertical bar may be curved in a circular shape without clearly distinguishing the outwardly extending portion and the inwardly extending portion. In this case, it is preferable that the tip of the circular curved portion forms an engaging contact portion that contacts the outer surface of the reinforcing bar in a wedge shape.

As another modification, not the end of the vertical bar but the middle part may be bent to form a bent portion for restraining and holding the reinforcing bar.

Although some of the modifications are listed and described, other than the above, various modifications and variations can be made within the same range as or equivalent to the present invention.

[Brief description of drawings]

FIG. 1 is a diagram showing a state where concrete is laid on a slope of a mountain.

FIG. 2 is a diagram showing the overall structure of a landslide prevention wire mesh.

FIG. 3 is a perspective view showing a conventional landslide prevention wire mesh unit.

FIG. 4 is a front view showing a conventional landslide prevention wire mesh unit.

FIG. 5 is a front view of an embodiment of the present invention.

FIG. 6 is a view showing a state in which a reinforcing bar is restrained and held by a bent portion of a vertical bar.

FIG. 7 is a diagram showing a state before the reinforcing bars are fitted into the bent portions of the vertical bars.

FIG. 8 is a diagram showing a state in which a reinforcing bar pushes an inwardly protruding portion upward.

FIG. 9 is a diagram showing a state in which the engaging contact portion of the vertical bar is in contact with and engages with the outer surface of the reinforcing bar in a wedge shape.

[Explanation of symbols]

40 Net connector, 43 Upper horizontal bar, 44 Lower horizontal bar,
45 left vertical bar, 46 right vertical bar, 45a, 45c, 46a,
46c outwardly projecting portion, 45b, 45d, 46b, 4
6d Inward projecting portion, 50 Landslide prevention wire mesh unit, 51 First wire mesh, 52 Second wire mesh, 57 Rebar.

Claims (4)

(57) [Claims] 1. A first wire mesh and a second wire mesh, which are positioned between the first wire mesh and the second wire mesh to keep a constant distance between both wire meshes, and both ends thereof have the first wire mesh and the second wire mesh. A horizontal bar connected to the horizontal bar, and a net connector having a vertical bar arranged to intersect the horizontal bar and fixed to the horizontal bar at the intersection, and at a crossing portion of the horizontal bar and the vertical bar. In the connected state, the first
And a reinforcing rod extending between the second wire nets, the landslide preventing wire mesh unit comprising: Is the same as the direction in which the horizontal bar extends.
Outwardly extending part and outwardly extending part
Bend and extend from the tip of the minute toward the intersection.
And a building in the direction protruding portion, wherein the direction protruding portion abuts has an engaging abutment portion which presses against the reinforcing bar towards the intersection, the engaging contact with the reinforcing bars A landslide prevention wire mesh unit, wherein a space between the portion and the horizontal bar and a space between the engaging contact portion and the vertical bar are smaller than a diameter of the reinforcing bar. 2. The end portion of the vertical bar is bent so that the folding
The landslide prevention wire mesh unit according to claim 1 , wherein a bent portion is formed, and a tip of the vertical bar forms the engagement contact portion . 3. A first and second wire netting and a space between the first and second wire nettings, which is located between the first and second wire nettings.
Is kept constant, and both ends of the first and second
The horizontal bar connected to the wire mesh will intersect with the horizontal bar.
The vertical bar that is fixed to the horizontal bar at the intersection.
And the first connector in a state of being connected to the intersection of the horizontal bar and the vertical bar.
And a landslide with a rebar extending between the second wire mesh
In the wire mesh unit for prevention, the vertical bar elastically receives and holds the reinforcing bar.
Has a bent portion, the end portion of the vertical bar is bent to form the bent portion, and the tip of the vertical bar abuts the rebar,
An engaging contact portion is formed to be pressed toward the intersecting portion, and the interval between the engaging contact portion and the horizontal bar and the engaging contact are formed.
The distance between the contact part and the vertical bar is smaller than the diameter of the reinforcing bar.
A wire mesh unit for preventing landslides , which is characterized by the fact that 4. The horizontal bar includes an upper horizontal bar located above and a lower horizontal bar located below, and an upper end portion of the vertical bar is located above the upper horizontal bar and the bend. A lower end portion of the vertical bar is formed below the lower horizontal bar to form the bent portion, the rebar includes an upper rebar and a lower rebar, and the upper rebar is the The landslide prevention wire mesh unit according to any one of claims 1 to 3, which is held by a bent portion of an upper end portion of the vertical bar, and the lower reinforcing bar is held by a bent portion of a lower end portion of the vertical bar.