JP4586134B2 - Detection device for falling rocks - Google Patents

Description

  The present invention relates to an impact detection device, and more particularly, to an impact detection device for falling rocks, etc., which is installed on a natural ground where there is a risk of falling rocks and continuously detects falling rocks.

  A conventional rockfall detection device has a pair of detection plates and sensors, and the sensors are arranged between the detection plates so as to send a detection signal when receiving a load of a predetermined weight or more on each detection plate. A detection device is disclosed. (See Patent Document 1)

JP 2005-9174 A

However, since the falling rock detection device shown in Patent Document 1 holds the detection plate opened by the reaction force of the sensor (tube sensor), the opening / closing angle of the detection plate and the restoring force of the detection plate are controlled. To change the reaction force part (tube) of the sensor, the sensor reaction force part must be replaced and the internal sensor must be replaced at the same time. There was a possibility of being forced.
In addition, changing the reaction force part of the sensor requires a new replacement of the sensor reaction part with a changed material and thickness, which increases construction costs and simplifies detection sensitivity changes. Could not be done.

Accordingly, an object of the present invention is to provide an impact detection device for falling rocks and the like that can easily change the opening / closing angle of the impact plate with respect to the installation surface and the restoring force of the impact plate with a simple structure. Objective.

Accordingly, a first invention of the present application made to achieve the above object includes a bottom plate installed on an installation surface, a receiving plate connected to the bottom plate so as to be openable and closable and receiving an external force, and the receiving plate. In an impact detection device, such as a falling rock , provided with an elastic member to be urged and a sensor that is disposed between the impact plate and the bottom plate and detects the displacement of the impact plate , the elastic member has a rope shape. The rope-shaped elastic member is interposed between the receiving plate and the bottom plate, and the receiving plate is directed toward the standby position by the restoring force of the curved rope-shaped elastic member. An object of the present invention is to provide an impact detection device for falling rocks or the like, wherein both ends of the curved rope-like elastic member are attached to the impact plate and the bottom plate so as to be restored .
Further, the second invention of the present application is the receiving detection device for falling rocks or the like according to the first invention of the present application, wherein the opening and closing angle of the receiving plate during standby is changed by changing the attachment positions of both ends of the elastic member. The present invention also provides an impact detection device for falling rocks, etc., characterized in that the restoring force of the impact plate can be adjusted.
According to a third invention of the present application, in the receiving detection device for falling rocks or the like according to the first or second invention of the present application , a plurality of the rope-like elastic members are attached between the receiving plate and the bottom plate. An object of the present invention is to provide an impact detection device for falling rocks or the like.
According to a fourth invention of the present application, in the detection device for falling rocks or the like according to any one of the first to third inventions of the present application, at least one of the receiving plate and the bottom plate is net-like. The present invention provides an impact detection device for falling rocks.
Further, a fifth invention of the present application is the impact detection device for falling rocks or the like according to any one of the first to third inventions of the present application, further comprising a binding member, wherein the binding member includes the impact plate and the bottom plate. And a receiving device for detecting a falling rock or the like, characterized in that the receiving plate and the bottom plate are constrained so that the angle between the receiving plate and the bottom plate does not open beyond a certain level .

  The present invention can obtain at least one of the following effects by means for solving the above-described problems.

<1> The detection sensitivity of the impact detection device can be changed according to the construction site.
By adjusting the length of the rope-shaped elastic member , you can arbitrarily adjust the opening / closing angle of the receiving plate with respect to the installation surface during standby and the restoring force of the receiving plate, as well as the diameter, strength, material, By changing the attachment length and the number of attachments, the open / close angle of the receiving plate, the restoring force of the receiving plate, and the detection sensitivity of the sensor can be arbitrarily adjusted.
In addition, when the installation location has not only a vertical inclination but also a horizontal inclination, a plurality of rope-like elastic members are provided in the horizontal direction, and each elastic member is individually attached to its mounting position and length. By adjusting the angle, it is possible to arbitrarily adjust the inclination of the receiving plate with respect to the installation surface.

<2> Sediment and snow accumulation deterrence effect By making the bottom plate and the receiving plate meshed, small soil and snow will not pass through and accumulate easily. Reduction can be achieved.

<3> Preventing false detection due to wind By forming the bottom plate and the receiving plate in a mesh shape, the wind force received by the bottom plate and the receiving plate can be reduced, and erroneous detection caused by the wind can be prevented.

<4> Other effects The structure of the entire apparatus is simple and low-cost, and the method of use is simple, as long as the apparatus is attached to a natural ground and connected to a logger.
In addition, since the number of component parts of the apparatus is small and precision equipment such as optical fiber is not used, the frequency of failure is low and the structure is optimal for rockfall detection.
In addition, by making the bottom plate and the receiving plate mesh, weight reduction is possible and on-site installation is easy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration FIG. 1 shows an outline of the receiving device of the present invention.
The receiving detection device 1 of the present invention is attached to the bottom plate 2, the opening and closing of the bottom plate 2, receives an external force, and a rope-like shape that urges the receiving plate 3 in one direction . An elastic member 4 and a sensor 5 for detecting the displacement of the receiving plate 3 are provided. Each member will be described below.

<2> Bottom plate 2
If the baseplate 2 is a member comprised so that attachment to the natural ground is possible, there will be no restriction | limiting in particular in a raw material or a shape. More preferably, by making it a net as shown in FIG. 1, it contributes to the suppression of sediment accumulation and weight reduction, and can be easily constructed at the installation site.

<3> Shock plate 3
The impact plate 3 only needs to have a strength that can receive pressure against an external force, such as a falling rock, and the material and shape are not particularly limited. More preferably, by using a net as shown in FIG. 1, sediment accumulation can be suppressed, wind resistance can be reduced, and displacement of the receiving plate 3 due to factors other than falling rocks can be suppressed. can do.
One edge of each of the bottom plate 2 and the receiving plate 3 is connected by a known means such as a hinge, and the one edge is attached so as to be a fulcrum shaft when the receiving plate 2 is opened and closed.

<4> Press part 31
In addition, on the inner surface between the bottom plate 2 and the receiving plate 3, a pressing portion 31 is provided that can press the sensor 5 described later when the receiving plate 3 is displaced in the natural mountain direction.
By forming the pressing portion 31 so as to be a semicircular convex portion with respect to the sensor 5 to be contacted, the sensor 5 can be prevented from being damaged.
In this embodiment, the pressing portion 31 is attached to the inner surface of the receiving plate 3, that is, the surface between the bottom plate 2 and the receiving plate 3, but when the receiving plate 3 is displaced in the natural ground direction, the sensor 5 is moved. The attachment position is not particularly limited in the present embodiment as long as it is attached to a position where pressing is possible.
Similarly, the number of the pressing portions 31 to be attached may be appropriately determined depending on the lateral length of the receiving plate 3 and the type of the sensor 5.

<5> Elastic member 4
The elastic member 4 is a member having a well-known rope-like elasticity, such as a wire rope , and is attached so as to bias the receiving plate 3 in one direction.
More specifically, the mounting portion 41 provided at one end of the elastic member 4 is fixed to受撃plate 3, to secure the mounting portion 42 formed on the other ends of the elastic member 4 to the bottom plate 2.
In this case, it mounted so that the elastic member 4 is curved, the restoring force generated when the bending of the elastic member 4 is受撃plate have use the (repulsive force) configured to recover toward the standby position.
The mounting position of each attachment portion 41, 42 provided at both ends of the elastic member 4, but it may also be mounted on the side surface or outer surface as well as the inner surface between the bottom plate 2 and受撃plate 3.
In FIG. 1, the mounting positions of the mounting portions 41 and 42 are shifted in the lateral direction, but this is to prevent the receiving plate 3 from being damaged due to interference with each other when the receiving plate 3 is closed.
Further, as shown in FIG. 3, the opening and closing angle of the receiving plate 3 with respect to the installation surface and the restoring force can be adjusted by changing the length and mounting position of the elastic member 4, and the detection sensitivity of the sensor 5 can be arbitrarily set. Can be changed.
Similarly, the thickness of the elastic member 4, the strength, the material, length, by selecting the mounting number can be arbitrarily changed restoring force of the elastic member 4 described above.

<6> Sensor 5
The sensor 5 can be a tube sensor or the like, and is configured to send a specific detection signal when the sensor 5 is crushed by receiving an external force.
The sensor 5 is attached at a position between the bottom plate 2 and the receiving plate 3.
More specifically, the sensor 5 is attached to the bottom plate 2 or the receiving plate 3 with a metal fitting, a binding member (not shown) or the like, and is crushed by the pressing portion 31 when the receiving plate 2 is displaced in the natural ground direction. In addition, it is attached at a position facing the pressing portion 31.
Further, both ends of the sensor 5 protrude from the receiving plate 3 and are connected to a measuring device (not shown).

<7> Bundling member 6
Binding member 6, Ru used to connect the base of each end of the elastic member 4. The binding member 6 can be constrained so that the angle between the bottom plate 2 and the receiving plate 3 during standby is not opened more than a certain angle.

[Action]
Next, the operation of the impact detection device 1 of the present invention will be described.

[Standby state of rock fall]
受撃detecting device 1, Ru is used by installing the natural ground of the detection is required site rockfall. More specifically, the edge where the bottom plate 2 and the receiving plate 3 are connected is installed in the direction in which falling rocks come, that is, the direction where the altitude is high.
A constant opening / closing angle is maintained between the bottom plate 2 and the receiving plate 3 by the restoring force (repulsive force) of the elastic member 4 and the binding force of the bundling member 6 to maintain the falling rock standby state.

[Detection of falling rocks]
As shown in FIG. 4, when a load such as falling rock B is received on the receiving plate 3, the receiving plate 3 is displaced so as to be closed with respect to the bottom plate 2 due to the load. It works to crush the sensor 5. When the sensor 5 is crushed, the sensor 5 sends a specific detection signal to the measurement device, and the measurement device acquires and analyzes the detection signal, whereby it is possible to detect the occurrence of the falling rock.

[Restoring to standby]
After the falling rock B has passed, the receiving plate 3 returns to a predetermined position by the restoring force of the elastic member 4, the pressure on the sensor 5 is also released, and the standby state for detecting falling rocks returns.
Thus, receiving撃検detection apparatus 1 can detect the number of times falling rocks.

[Detection device adjustment]
For example, receiving撃検detection apparatus 1 Te small rock fall like smell no need for detecting if that detects the falling rocks is to increase or to such an arrangement the number of the elastic members 4 for受撃plate 3受撃It is also possible to increase the repulsive force of the plate 3 and reduce the detection sensitivity of the falling rock B.
In addition, even if the falling rock B is generated, if the falling rock does not contact the impact receiving plate 3 and cannot be detected , the length of the elastic member 4 and the curvature of the curvature are increased, and the impact is received. By adjusting the opening / closing angle of the plate 3 so as to approach 90 degrees with respect to the inclined surface, that is, the installation surface, the falling rock B can be easily brought into contact with the receiving plate 3.

The falling rock detection device of the present application has a simple structure with few failures, and it is not necessary to use an expensive member such as an optical fiber for the detection sensor, and other members are also low in cost. It's easy to do.
Therefore, it is an optimal device for the field of falling rock detection that needs to be constantly monitored over a long period of time.

[Modification]
FIG. 5 shows a modification .
Since the bottom plate 2 is provided for the purpose of fixing the natural ground A and the impact detection device 1, the bottom plate 2 can be omitted from the first embodiment of the present invention.
In the case of this example , one edge of the receiving plate 3 fixed to the edge of the bottom plate 2 can be directly opened and closed to the ground A, or the elastic member fixed to the bottom plate 2 Even if the mounting portion 42 of 4 is directly fixed to the natural ground A, the same effect can be obtained.

The external view of the Example of the receiving detection apparatus of this invention. The side view of the Example of the impact detection apparatus of this invention. The side view at the time of changing the attachment position of the elastic member in an Example . The side view which shows the displacement of the receiving board at the time of falling rock occurrence in an Example . The side view of the modification of an impact detection apparatus.

DESCRIPTION OF SYMBOLS 1 Impact detection apparatus 2 Bottom plate 3 Impact plate 31 Press part 4 Elastic members 41 and 42 Attachment part 5 Sensor 6 Bundling member A Ground mountain B Falling rock

Claims (5)

A bottom plate installed on the installation surface, a receiving plate connected to the bottom plate so as to be openable and closable, receiving an external force, an elastic member for urging the receiving plate, and disposed between the receiving plate and the bottom plate in受撃detector rock fall or the like anda sensor for detecting the displacement of the受撃plate Te,
The elastic member has a rope shape;
The rope-shaped elastic member is interposed between the receiving plate and the bottom plate,
Both ends of the curved rope-shaped elastic member are attached to the receiving plate and the bottom plate so that the receiving plate is restored toward the standby position by the restoring force of the curved rope-shaped elastic member. And
A detection device for receiving rocks. The receiving detection device for falling rocks or the like according to claim 1 , wherein the opening / closing angle of the receiving plate or the restoring force of the receiving plate during standby can be adjusted by changing the attachment positions of both ends of the elastic member. A receiving detection device for falling rocks, etc. The receiving detection device for falling rocks or the like according to claim 1 or 2 , wherein a plurality of the rope-shaped elastic members are attached between the receiving plate and the bottom plate . Impact detection device. 4. A falling detection device for falling rocks according to claim 1 , wherein at least one of the receiving plate and the bottom plate is net-like. The receiving detection device for falling rocks or the like according to any one of claims 1 to 3 , further comprising a bundling member, wherein the bundling member is connected between the receiving plate and a bottom plate, and the receiving plate and An impact detection device for falling rocks or the like, characterized in that the bottom plate is restrained so that the angle of the base plate does not open beyond a certain level .

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