JP3138242B2 - Landslide detection device - 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 detection device used to detect a landslide, a falling rock, a fallen tree, or the like that occurs on a mountain slope or the like.

[0002]

2. Description of the Related Art There have been frequent human and physical damages caused by landslides and rockfalls caused by localized torrential rain or heavy rain after an earthquake.

[0003] As a countermeasure, a detecting device is installed in a danger area where there is a risk of landslides and falling rocks, and an initial situation of those landslides and a phenomenon leading to a large-scale falling including small-scale falling rocks are detected. By promptly reporting to the managers and local residents to avoid disasters and prevent secondary disasters.
Disaster prevention management system is being constructed.

On mountain roads and railroads, falling rocks and landslides can hinder traffic and cause more serious disasters. Therefore, falling rocks and landslides are immediately detected and warning information is provided to passing vehicles. It is necessary to adopt a disaster prevention management system that reports to the administrator.

Conventionally, as a detection device applied to such a disaster prevention management system, a detection line is installed in a danger area while being energized, and the detection line is disconnected to prevent landslides and falling rocks. A device of a detection type, a device for detecting distortion of the ground, a monitoring camera, and the like are used.

[0006]

Among the above-mentioned conventional detecting devices, the device for detecting ground distortion and the surveillance camera have a complicated structure and are very expensive. Moreover, in the case of a surveillance camera, it is necessary for an administrator to monitor image data.

On the other hand, a detection device using a detection line has a simple structure and is relatively inexpensive.
Since it is a method of detecting a falling rock or the like, the detection line cannot be reused after the detection, and the detection line needs to be replaced every time the detection is performed. In addition, there is a possibility that a detection signal is output (malfunction) when the detection line is disconnected for any reason other than the occurrence of landslides, falling rocks, or the like.

Furthermore, according to the detection apparatus of the detection line method, the ground distortion detection method, and the monitoring camera, it is necessary to always energize (power on) the detection unit in a state of installation in a dangerous place. Therefore, there is still a problem in terms of running costs.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a landslide detection device which has a simple structure, is excellent in durability, and does not need to supply electricity to the detection portion itself.

[0010]

In order to achieve the above object, a landslide detection device according to the present invention, as illustrated in FIGS. 1 to 4, is used in a danger area where landslides and rocks may occur. The apparatus main body 1 includes a detection wire 2 or a strip-shaped net for detection, and a reel 11 around which one end of the detection wire 2 (or net) is wound. Giving a turning force in the take direction,
A spring (torsion coil spring) 12 for applying tension to the detection wire 2 (or net), and the detection wire 2 (or net) are supported by the other end of the detection wire 2 (or net). A sensor (for example, a limit switch 13) that generates an output when the reel (or net) is pulled out from the apparatus main body 1 and the reel 11 rotates a predetermined amount is provided, and the sensor output is used as a detection signal. It is characterized by:

According to the detecting device of the present invention having the above configuration,
When a load is applied to the detection wire 2 (or net) placed on the danger area due to landslide or rock fall, the load is converted into rotation of the reel 11 and the detection is performed. There is no need to energize itself.

In addition, since a detection signal is generated only when a load is applied to the detection wire 2 (or the net) and the detection wire 2 (or the net) bends, even if a disconnection occurs for any reason, the detection is performed. No signal is output.

Here, in the detection device of the present invention, since the load caused by landslide and rock fall is converted into rotation of the reel 11 and detected as described above, the detection wire 2 ( Or, if the net is detached from the reel 11, the detection wire 2 (or the net) can be reused after detecting a landslide, a falling rock, or the like.

In the detecting device of the present invention, the sensor is configured to generate an output when the reel rotates a predetermined amount, so that the sensor is turned on when the reel starts rotating. Then, there is a possibility that the detection signal may be output due to the expansion and contraction of the detection wire (or the net) due to the temperature, or the bending of the wire or the like due to the wind pressure. Range).

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a configuration of an embodiment of the present invention, and FIG. 2 is a plan view of the embodiment.

The landslide detection device of the present embodiment is mainly constituted by an apparatus main body 1 and five detection wires (stainless steel wires having a diameter of 2 mm) 2.

The apparatus main body 1 comprises a rectangular vertically long case 1A having an open front side, and a lid 1B for closing the front opening of the case 1A. Detection wires 2 are wound inside the case 1A, respectively. 5 reels 11 to hang
11 are arranged at a constant pitch (for example, 80 mm) in the vertical direction. These reels 11 are rotatably supported on the same rotating shaft 10.

Each of the reels 11 is provided with a torsion coil spring 12, and a predetermined tension can be applied to the detection wire 2 by the elastic force of the spring 12.
Each reel 11 is provided with a limit switch 13.

The limit switch 13 is a sealed / waterproof type magnetic switch, and as shown in FIG.
It is composed of a magnet 13A fixed to one side surface and a contact 13B (a contact) sealed in a glass tube 13C. When the magnet 13A faces the contact 13B (FIG. 3A), Contact 1 is generated by the magnetic force of magnet 13A.
3B is kept open, and from this state, the reel 11
Is rotated and the magnet 13A is displaced from the position facing the contact 13B (FIG. 3B), the contact 13B is closed.

In the above embodiment, an outlet (not shown) for the detection wire 2 is provided on one side surface of the case 1A of the apparatus main body 1 at a position facing each reel 11. On the other side of the case 1A, a support member 1C is provided for fixing the end of the detection wire 2 of the adjacent detection device when connecting a plurality of the detection devices of the present invention to expand the detection area. ing.

Next, the installation procedure and operation of this embodiment will be described below. First, in order to install the detection device in a danger area where landslides and rockfalls may occur, a plurality of columns (not shown) are installed in the detection area so that one span is 10 m. The main body 1 is fixed to one of the columns, and the end of each detection wire 2... 2 is guided to the adjacent column, and the end is adjusted by the turnbuckle 3 while adjusting the tension of the wires. It is performed by a procedure of fixing to a support (support member 1C).

In this installation state, for example, a tension of 10 kg / piece is applied to each detection wire 2 by the elastic force of the torsion coil spring 12. In addition, each reel 1
The magnet 13A of the limit switch 13 provided in FIG.
As shown in (a), it is located immediately below (contact position) the contact 13B, and the limit switch 13 is kept open.

Now, when a landslide or a falling rock occurs and a falling rock or the like hits the detecting wire 2, the load causes the detecting wire 2 to bend and the reel 11 rotates accordingly.

In the initial stage of the rotation, the magnet 13A is connected to the contact 13B
And the limit switch 13 is kept open, but as shown in FIG.
When the magnet 13A is displaced from the position facing the contact 13B by the rotation of 1 and the magnetic force no longer reaches the contact 13B (see FIG. 3B), the limit switch 13 is closed and the detection signal is output. Thereafter, when the reel 11 further rotates due to a load such as a falling rock, the end of the detection wire 2 comes off the reel 11.

As shown in FIG. 5A, a bead-like projection P is provided at the end of the detection wire 2 and the projection P is provided on the side wall of the reel 11 as shown in FIG.
Is provided, and one end of the detection wire 2 is locked in the slit groove S. When a predetermined load (for example, about 15 kg) or more acts on the detection wire 2, FIG. As shown in (1), there is a mechanism in which the end of the detection wire 2 comes off the slit groove S and comes off the reel 11.

Here, according to the present embodiment, the detection wire 2 is made of stainless steel and has high rust prevention, and the device main body 1 is also a simple mechanism, so that it has excellent durability.

A support member 1C for fixing the end of the detection wire 2 of the detection device to be installed next to the device body 1
Is provided, for example, with 10 m as a unit span,
A large number of detection devices can be connected in series, which makes it easy to construct a wide detection area. With such a wide installation, the size of the collapse scale can be detected. There is an advantage that you can.

Next, an example of a road disaster prevention management system using this embodiment will be described with reference to FIG.

In the disaster prevention management system shown in FIG. 6, a large number of detection devices are installed in a collapse danger expected area along a road, and detection wires 2 are spread over a wide area.
The system supplies the detection signal of 1 to the on-site controller 201.

The on-site controller 201 selects and activates the permanent monitoring camera 202 in response to a detection signal output from the detection device due to the occurrence of a falling rock, etc. "(Warning information is provided), the revolving light 204 is driven (warning signal display), and a signal indicating the occurrence of a falling rock is supplied to the road management room to notify the manager. Have been.

If the above-mentioned disaster prevention management system is provided, when a falling rock or a landslide occurs, the abnormality can be immediately detected and alert information can be supplied to the passing vehicle. In addition, the road manager can immediately know the occurrence of falling rocks or the like by an alarm or the like, and can also grasp the situation of falling rocks or the like with a video. As a result, the safety of road users and the efficiency of road management can be improved. Such a system can also be applied to disaster prevention management of local residents and houses.

In the above embodiment, the number of detection wires is five, but the number of wires is not particularly limited, and may be one or an arbitrary number.

In the above embodiment, an example in which a detection wire is used as the detection unit has been described. Instead, as shown in FIG. 7, a belt-shaped detection net 102 (for example, made of stainless steel wire) is used. May be. In this case, as in the previous embodiment, the detection net 102A
, A torsion coil spring, a limit switch, and the like.

The sensor used in the detection device of the present invention is not particularly limited, and may be a contact type limit switch provided with an actuator in addition to the above-mentioned magnet type (non-contact) limit switch, or a power source. However, a photoelectric switch or a proximity sensor may be used.

As the spring for applying tension (rotational force to the reel) to the detection wire or the net, besides a torsion coil spring, for example, a spiral spring, a tension coil spring,
Alternatively, the present invention can be implemented by using a compression coil spring or the like.

[0037]

As described above, according to the landslide detection device of the present invention, a load caused by landslides, rocks, and the like is applied to a detection wire or a net extending to a dangerous place where landslides and rocks may occur. When the load is applied, the load is converted into rotation of the reel and the detection is performed, so that there is no need to energize the detection unit itself such as a detection wire. Moreover, it has a simple structure and excellent durability, and is inexpensive and economical.

[Brief description of the drawings]

FIG. 1 is a front view showing a structure according to an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a diagram schematically showing a configuration of a limit switch used in the embodiment of the present invention.

FIG. 4 is a diagram illustrating an operation according to the embodiment of the present invention.

FIG. 5 is a diagram schematically showing a configuration of a wire detachment mechanism applied to the embodiment of the present invention.

FIG. 6 is a block diagram showing an example in which the embodiment of the present invention is applied to a road disaster management system;

FIG. 7 is a diagram showing a configuration of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Apparatus main body 1A Case 1B Cover 1C Support member 11 Reel 12 Torsion coil spring 13 Limit switch 13A Magnet 13B Contact 2 Detection wire 3 Turnbuckle 102 Detection net

Claims (2)

(57) [Claims] 1. A detecting device for detecting landslides, rockfalls, and the like generated on mountain slopes, etc., wherein a detection wire or a strip-shaped net is set at a dangerous place where landslides or rockfalls may occur. And a device main body. The device main body includes a reel around which one end of the detection wire or the net is wound, and a rotational force in a winding direction on the reel to apply tension to the detection wire or the net. When the detection wire or the net is pulled out of the apparatus main body and the reel is rotated by a predetermined amount, an output is generated from the installation state in which the spring and the other end of the detection wire or the net are supported and a predetermined tension is applied. A landslide detection device provided with a sensor, wherein the sensor output is used as a detection signal. 2. The landslide detection device according to claim 1, wherein the end of the detection wire or the net is detached from the reel after the sensor generates an output. .