JPH0120657Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The present invention relates to a submarine-mounted sensor used in a system that uses submarine cables to install sensors on the ocean floor and transmit observation data online to land.
In particular, it relates to a frame mechanism for a submarine-mounted sensor that requires the sensor to be directed toward the sea surface.

[Prior art]

As shown in FIG. 1, the conventional frame mechanism of this kind of submarine-mounted sensor is such that a sensor 3 is housed within a frame 1 formed of rod-shaped materials, for example, in the shape of a triangular pyramid, via a mounting bracket 2. The structure is such that Note that 4 in the figure is a submarine cable connected to the sensor 3.

In this frame mechanism, when the sensor 3 is installed on the seabed, it is suspended from a work boat 6 by a suspension cable 7 and installed on the seabed 8 so that the sensor 3 faces the sea surface 5, as shown in FIG. However, in this case, the suspension rope 7 is either separated from the work boat 6 and abandoned on the seabed 8 after the sensor is installed, or the frame 1 and the suspension rope 7 are separated from each other.
It is necessary to interpose a separation device 9 in advance between the two and separate the sensors after installation, and it is also necessary to prevent the suspension cable 7 and the submarine cable 4 from becoming entangled during suspension, which reduces work efficiency. It was bad.

Also, after installing the sensor, connect the submarine cable 4 to the submarine 8
When the submarine cable 4 is laid in a crawling manner, there is a risk of the frame 1 falling over due to twisting, pulling, etc. of the submarine cable 4, and there is also the drawback that the reliability of the installation is low.

[Purpose of invention]

The present invention was developed to solve the above-mentioned drawbacks of the conventional technology. It does not require hanging cables as in the past, and can be installed using only submarine cables. It also allows the sensor to always be directed towards the sea surface. The objective is to obtain a highly reliable frame mechanism that is capable of

[Structure of the idea]

In order to achieve the above-mentioned object, the present invention arranges a mounting bracket having a weight on the inside of a main frame formed of rod-shaped materials in a substantially rectangular parallelepiped shape, and connects both ends of the mounting bracket to the main frame. The main frame is rotatably supported, and the sensor is mounted in the center of the mounting bracket so as to face vertically, and a guide frame such as a square pyramid is installed on the four peripheral surfaces of the main frame excluding the top and bottom surfaces so as to protrude outward. A submarine cable is fixed to the tip of any guide frame, and a stopper pin is provided at the center of the upper or lower surface of the main frame to restrict the rotation of the mounting bracket. When suspended on the seabed by cable, the top or bottom surface of the main frame touches the seabed by the action of the guide frame, and at this time, the sensor inside the main frame faces toward the sea surface by rotating the mounting bracket. .

〔Example〕

FIG. 3 is a perspective view showing an embodiment of the frame mechanism of the submarine-mounted sensor according to the present invention, FIG. 4 is a longitudinal sectional view thereof, and FIG. 5 is a side view. This is a submarine cable connected to 3.

Reference numeral 10 denotes a main frame formed of a rod-shaped material so as to have a substantially rectangular parallelepiped shape. Inside this main frame 10, a mounting bracket 11 formed in a semicircle or the like is arranged, and both ends of the mounting bracket 11 are provided on the main frame 10. It is rotatably supported by support fittings 12a and 12b. A weight 13 is provided on the mounting bracket 11, and the sensor 3 is attached to the center of the weight 13 so as to face upward and downward.

Furthermore, out of the four peripheral surfaces of the main frame 10 having the shape of a rectangular parallelepiped, excluding the top and bottom surfaces, guide frames 14 are formed on one of the two opposing surfaces so as to protrude outward to form a quadrangular pyramid, and the other side A guide frame 15 is formed protruding outwardly from two opposing surfaces of the , respectively, to form a triangular prism, and furthermore, a submarine cable 4 is connected to an arbitrary tip of the guide frame 14 via a fixing fitting 16. A predetermined location is fixed.

17 is a stopper pin, this stopper pin 17
is attached to the center of the upper or lower surface of the frame 10 in order to limit the rotation of the mounting bracket 11.

When the frame mechanism configured in this manner is installed on the seabed, it is suspended from the work boat 6 using only the submarine cable 4, as shown in FIG. At this time, the mounting bracket 11 to which the sensor 3 is attached rotates freely inside the frame 10, but since the rotation is restricted by the stopper pin 17, it does not rotate more than one rotation. The submarine cable 4 between the mounting bracket 11
will not be damaged by rotation.

Now, in the frame mechanism suspended from the submarine cable 4, one guide frame 14 comes into contact with the seabed 8 first, as shown in FIG. Since the tip thereof is on the lower side and is unstable, the main frame 10 rotates in the direction shown by arrow A, for example, and with the addition of the action of the guide frame 15, the main frame 10 rotates against the stopper pin 17. It is installed on the seabed 8 by landing on the bottom so that the water is on the top or bottom. At that time, even if the stopper pin 17 is located at the top or bottom, the mounting bracket 1
Due to the rotational moment caused by the weight 13 provided on the sensor 3, the sensor 3 faces upward, that is, toward the sea surface.

Next, as described above, the sensor 3 is attached to the main frame 10.
When the submarine cable 4 is laid on the seabed 8 along the seabed 8 and then laid toward the land, even if the main frame 10 rotates due to twisting, pulling, etc. of the submarine cable 4, the guide Due to the action of the frames 14 and 15, the main frame 10 is always in a state where the stopper pin 17 is located at the top or bottom, and in this case, the rotation of the mounting bracket 11 by the weight 13 and the stopper pin 17 allow the sensor 3 to be directed toward the sea surface. .

If it is expected that the frame mechanism will be pulled by the submarine cable 4 and move when laying the submarine cable 4, it should be installed on the side opposite to the side on which the submarine cable 4 is fixed, as shown in Figure 8. The anchor 19 may be connected to the side guide frame 14 via the cable 18 in advance.

[Effect of idea]

As explained above, the frame mechanism according to the present invention can be suspended and installed using the submarine cable connected to the sensor, eliminating the need for conventional suspension cables and separation devices. Since there is no need to take care to prevent the cable and the submarine cable from becoming entangled during installation, the installation is both economical and easy, and has the effect of improving the workability of installation.

In addition, the guide frame formed around the four sides of the main frame and the mounting bracket rotatably supported inside the main frame ensure that the sensor always faces safely and reliably toward the sea surface, not only during installation but also when laying submarine cables. This has the effect of increasing the reliability of installation, and can be widely used as a frame mechanism for submarine-mounted sensors that must be oriented toward the sea surface.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the frame mechanism of a conventional submarine-mounted sensor, Fig. 2 is a simplified diagram showing its installation work, and Fig. 3 is an example of the frame mechanism of the submarine-mounted sensor according to the present invention. Perspective view shown, No. 4
The figure is a longitudinal cross-sectional view, Figure 5 is a side view of the same, Figure 6 is an explanatory diagram showing the installation work state of the above embodiment, Figure 7 is a simplified diagram showing the state reached the seabed, and Figure 8 is a guide. FIG. 3 is a simplified diagram showing a state in which an anchor is connected to a frame. 3...sensor, 4...submarine cable, 10...
Main frame, 11...Mounting bracket, 12a, 12b
...Supporting metal fittings, 13...Weights, 14, 15...
...Guide frame, 16...Fixing bracket, 17...
Stoppin, 18...cable, 19...anchor.

Claims (1)

[Scope of utility model registration request] A mounting bracket with a weight is placed inside the main frame, which is formed into a substantially rectangular parallelepiped shape using rod-shaped materials, and both ends of the mounting bracket are rotatably supported by the main frame. The sensor is mounted so as to face in the vertical direction, and a guide frame such as a square pyramid is formed on the four peripheral surfaces of the frame excluding the top and bottom surfaces so as to protrude outward, and the sensor is attached to the tip of any guide frame. A frame mechanism for a submarine-mounted sensor, characterized in that a submarine cable connected to the frame is fixed, and a stopper pin for restricting rotation of the mounting bracket is provided in the center of the upper or lower surface of the frame.