JPH0315016Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a plankton collecting net used to collect plankton etc. floating in water. This paper is about a multi-stage plankton collection net.

(Conventional technology) Conventional open/close multi-stage plankton collection nets are
There are four-stage collection nets that can be automatically opened and closed by the Japan Meteorological Agency.

In the conventional plankton collecting net described above, one net with an open tip and multiple nets with closed tips are attached to one frame, and the frame is allowed to sink to a predetermined depth. After that, the net is opened at the end and plankton is collected by pulling it up. When the output of the filter meter attached to the frame (the amount of water flowing into the opening of the net) reaches a predetermined value, the opening of the net is automatically closed and at the same time the tip of the next net is opened. They are now collecting plankton and other materials again.

However, in such conventional open/close multi-stage plankton collecting nets, the collecting depth is estimated based on the length of the wire that pulls the frame and its inclination angle, so it is difficult to know the exact collecting depth. The problem was that I couldn't do it.

(Problem to be solved by the invention) The present invention was made to solve these conventional problems, and it opens and closes the opening at the tip of the net at any time while monitoring the collection depth. The purpose of this invention is to provide a multi-stage plankton collection net that can be opened and closed.

(Means for solving the problem) The means for solving the problem in this invention are as follows:
A frame suspended by a tow rope, a pair of guide rails arranged and fixed horizontally in pairs and adjacent to each other in the vertical direction, sliders slidably mounted between each pair of guide rails, and between each of the sliders. a plankton collection net disposed on each of the frames, a water depth sensor attached to the frame, a notification means for receiving a signal output from the water depth sensor and notifying an operator of the depth of the frame, and a guide rail for each slider. A biasing means for slidingly biasing toward one end, a locking means for independently locking each slider to the other end of each guide rail against the respective biasing means, based on a command from an operator. a release means for releasing the locking of each slider by the locking means for each slider; one tip edge of the collecting net is fixed to a slider located relatively above; The present invention is characterized in that each collection net is disposed between vertically adjacent sliders by fixing the edges to sliders located relatively below.

(Function) With the above-mentioned configuration, the present invention can accurately know the actual depth of the frame, that is, the sampling depth, while being on the research vessel, and also transmits an opening/closing signal from the ship while monitoring this depth. Then, the locking of the slider by the locking means can be released at any time and the slider can be slid by the force of the biasing means, so that the opening at the tip of the collection net that had been used for collection until then can be released. You can close the section to open the next collection net opening.

(Example) Each of the drawings shows an example of the openable/closable multi-stage plankton collecting net according to the present invention. A plurality of guide rails 3a, 3b, 4a, which are large and arranged and fixed adjacently in the vertical direction,
4b, 5a, 5b, 6a, 6b, and each guide rail 3a, 3b, 4a, 4b, 5a, 5b,
Sliders 7, 8, 9, 10 on 6a and 6b, respectively.
is attached so that it can slide freely.

Note that the sliders 7, 8, 9, 10 are connected to the guide rails 3a, 3b, 4a, 4b, 5a, 5b, 6a,
6b, in the embodiment, a pair of drum-shaped rollers 11, 11 are pivotally attached to both ends of the sliders 7, 8, 9, 10, and guide rails 3a, 3b, 4a, circular in cross section, 4b, 5a,
5b, 6a, 6b as the pair of drum-shaped rollers 1
1 and 11, the guide rails 3a, 3b, 4a, 4b, 5a, 5b, 6a,
Although the sliders 7, 8, 9, and 10 can be reliably slid along the line 6b, the structure for engaging them is not limited to the embodiment.

As mentioned above, the guide rails 3a, 3b, 4a,
Plankton collecting nets 12, 13, 1 are arranged between the sliders 7, 8, 9, 10 which are slidably attached to the sliders 4b, 5a, 5b, 6a, 6b, respectively.
4, 15, and these collection nets 12, 1
3, 14, 15 are fixed to the sliders 7, 8, 9, 10 located relatively above, and the other end edges are fixed to the sliders 7, 8, 9, located relatively below. 10, when the distance between adjacent sliders is increased, the collection net 1 connected to both sliders is
The tip openings 2, 13, 14, and 15 are opened.

In the embodiment, a collection net 12 is also provided behind the slider 7 located at the top (left side in FIG. 2).
By holding this collection net 12 between the slider 7 and the frame 2, the sliders 7, 8,
Numbers 9, 10 and collection nets 12, 13, 14, 1
5, the collection net 12 located at the left end in FIG. 2 may be omitted.

On the other hand, in the frame 2 located on the left side in FIGS. 1 and 2, wires 16a, 16b, 17a, 17b, 18a, 1
Drums 20, 21, 22, 23 are interlocked via 8b, 19a, 19b, and urging means 24, 25, 26 for rotationally urging the drums 20, 21, 22, 23 in the winding direction. , 27, these biasing means 24, 25, 2
6, 27 rotate the drums 20, 21, 22, 23 in the winding direction to rotate each slider 7, 8, 9,
10 is urged to slide to the left in the figure.

In the embodiment, retractor-type biasing means 24, 25, 26, which have built-in coil springs,
27 is provided, and the urging means 24, 25, 26, 2
At 7, the drums 20, 21, 22, and 23 are urged to rotate in the winding direction, and the sliders 7, 8, 9, and 10 are urged to slide to the left in the figure. The sliders 7, 8, 9, and 10 can also be biased to slide by using this.

Also, frame 1 located on the right side in FIG.
, the sliders 7, 8, 9, 10 resist the sliding biasing force of the biasing means 24, 25, 26, 27.
The guide rails 3a, 3b, 4a, 4b, 5a,
5b, 6a, and 6b, a water depth sensor 29 connected via a cable to a monitor installed on the ship (not shown), a water temperature sensor, a flow direction sensor, a flow velocity sensor, and a salinity sensor. A concentration sensor, a drainage sensor, etc. are provided, and the output signals of these sensors are also transmitted to an onboard display meter, recorder, etc., so that each of these pieces of information can be monitored or recorded.

Here, the locking means 28 is shown in FIGS. 5 and 6.
As shown in the figure, a wire 30 whose base end is fixed to each slider 7, 8, 9, 10, an engagement lever 31 pivoted to the frame 1 so as to be able to move up and down in the figure, and A lock lever 32 that engages and disengages, a spring 33 that rotationally biases the lock lever 32 in a direction to engage with the engagement lever 31, and a spring 33 that rotates and biases the lock lever 32 in a direction that causes the lock lever 32 to disengage from the engagement lever 31 against the spring 33. It is composed of a cam 34 for rotation.

By forming the engagement groove 35 in the engagement lever 31, the biasing means 24, 25, 26,
27 and move the sliders 7, 8, 9, 10 to the right end in FIG.
Insert each wire 30 of 9 and 10 into the engagement groove 35 of each engagement lever 31, position the knot 36 on the opposite side of the slider 7, 8, 9, and 10, and insert the wire 30 into the engagement lever 31. When engaged, the engagement lever 31 is engaged and held by the lock lever 32 by the sliding biasing force applied to the sliders 7, 8, 9, 10, thereby preventing the sliders 7, 8, 9, 10 from moving. It's structured.

Further, the release means 37 for releasing the engagement of the wire 30 by the engagement lever 31 is equipped with a motor that rotates the cam 34, and when an opening/closing signal is output from the ship (not shown), the cam 34 is moved to a predetermined position. It is structured so that it can be rotated by an angle of .

The wires 30, the engagement lever 31, the lock lever 32, the spring 33, and the cam 34 are provided in the same number as the sliders 7, 8, 9, and 10, and by making the phases of the cams 34 different from each other, For example, when the first open/close signal is received, only the lock lever 32 corresponding to the topmost slider 7 is operated to disengage, and when the next open/close signal is received, only the lock lever corresponding to the second slider 8 is disengaged. The structure is such that

In FIG. 7, 33 indicates each collection net 12, 1.
This is a stopper installed to regulate the opening width of each collection net 12, 13, 1.
Terminals 4 and 15 are each equipped with a bottom tube (not shown) similar to the conventional one.

When collecting plankton using the collection net configured as described above, first move all the sliders 7, 8, 9, and 10 to the right end in FIG. 1 and lock them with the locking means 28. Stop. Then, the collection net 12 held by the top slider 7 and the frame 2 opens, and the other collection nets 13, 14, 15 are all closed.

In this state, a tow cable (not shown) is let out to lower the collection net to a predetermined depth. After confirming on the ship that the collection net has reached a predetermined depth based on the signal transmitted from the water depth sensor 29, the index line is hoisted up and plankton collection is started.

During plankton collection, the plankton collection depth, water temperature, and
Flow direction, flow velocity, salinity, drainage rate, etc. can be monitored on board, or this information can be automatically recorded as needed.

Further, after confirming that collection has been completed at a predetermined depth by monitoring such information, a signal is transmitted from the ship to the release means 37. Then,
The cam 34 rotates by a predetermined angle, and only the lock lever 32 corresponding to the uppermost slider 7 is rotated clockwise in FIG. 5 against the spring 33 to be disengaged from the engagement lever 31.

On the other hand, since a sliding force is applied to the slider 7 in the left direction in the figure by the biasing means 24, the lock lever 32 is rotated counterclockwise in FIG. 5 via the wire 30. Motivating forces have been added. Therefore, as described above, the lock lever 32
When the lever 31 is released, the engagement lever 31 rotates counterclockwise, and the wire 30 slides out from the engagement groove 35 of the engagement lever 31, so that the slider 7
It moves to the left end in FIG. 1 under the urging force of . For this purpose, the collection net 12 that was opened earlier
The opening at the tip of the collecting net 13 is closed, and the tip of the next collecting net 13 is opened.

Note that since the slider 7 continues to be given a sliding biasing force to the left in the figure by the biasing means 24, the opening at the tip of the collecting net 12 whose opening is closed as described above remains closed.

Therefore, after closing the tip of the first collection net 12 and opening the tip of the second collection net 13, the depth is checked again and plankton collection is resumed. Similarly, the release means 37
sliders 8, 9, 10 each time the signal is received.
moves sequentially to the left in the figure, closes the tip of the previously opened collecting net, and opens the tip of the next collecting net.

Also, such collection nets 12, 13, 14,
15, the actual depth at that time can be monitored, making it possible to accurately know the sampling depth compared to the conventional method of estimating the depth based on the length of the tow line and its inclination angle. is possible,
Moreover, since the tip of the collection net can be opened and closed at any time, the reliability of the investigation can be improved.

Although four collection nets are used in the embodiment, the number of collection nets can be increased or decreased as necessary.

(Effects of the invention) This invention enables the tip of the collection net to be opened and closed by remote control while monitoring the depth at which plankton is collected from the ship. This makes it possible to increase the reliability of collection surveys compared to conventional equipment in which the collection net is opened and closed at the same time.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the opening/closing multi-stage plankton collection net according to the present invention, and Fig.
Figure 3 is a view in the direction of the arrow in Figure 1, Figure 4 is a view in the direction of the arrow in Figure 1.
The figures are a view taken in the direction of the arrows in Fig. 1, Fig. 5 is a schematic front view showing an enlarged view of the locking means, Fig. 6 is a plan view of a part of Fig. 5, and Fig. 7 is a schematic perspective view of the collection net. It is a diagram. 1...Frame, 3a, 3b, 4a, 4b, 5
a, 5b, 6a, 6b...guide rail, 7,
8, 9, 10...Slider, 11...Drum-shaped roller, 12, 13, 14, 15...Collection net, 1
6a, 16b, 17a, 17b, 18a, 18
b, 19a, 19b... wire, 20, 21, 2
2, 23...Drum, 24, 25, 26, 27,
28... Urging means, 29... Water depth sensor, 30...
... wire, 31 ... engagement lever, 32 ... lock lever, 33 ... spring, 34 ... cam, 3
5... Engagement groove, 36... Knot, 37... Release means, 38... Wire.

Claims (1)

[Scope of utility model registration request] a frame suspended by a tow rope; a pair of guide rails arranged and fixed horizontally to the frame and arranged adjacent to each other in the vertical direction; a slider slidably mounted between each pair of guide rails;
A plankton collecting net disposed between each of the sliders, a water depth sensor attached to the frame, a notification means for receiving a signal output from the water depth sensor and notifying an operator of the depth of the frame, and each of the sliders. urging means for slidingly urging each guide rail toward one end; locking means for independently locking each slider to the other end of each guide rail against the respective urging means;
A release means is provided for releasing the locking of each slider by the locking means based on a command from an operator, and one tip edge of the collection net is fixed to a slider located relatively upward, and each slider is locked by the locking means. A retractable multi-stage plankton collecting net characterized in that each collecting net is disposed between vertically adjacent sliders by fixing the other end edge of the collecting net to a slider located relatively below.