JPH0439563Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a sampling tool used for collecting research samples in environmental surveys, etc.
The present invention relates to a sampling tool for collecting underwater samples such as sediment deposited on the bottom of lakes, rivers, inner bays, etc., and plants distributed underwater.

(Conventional technology) When conducting environmental surveys or water quality surveys, it is necessary to collect bottom mud deposited on the bottom of the water, plants and animals living in the bottom mud, or aquatic plants distributed on the water surface or in the water. In many cases, research and analysis of its composition and types are conducted.

Such a bottom mud collection tool is a column-shaped one in which a cylindrical core holder is stuck into the bottom mud, the upper end of the core holder is sealed with a valve, and the bottom mud that has entered the core holder is pulled up together with the core holder. There are known mud collectors and box-type mud collectors in which mud is deposited on a box with an open bottom and the mud from the bottom is scooped out.

Furthermore, as a tool for collecting aquatic plants, etc., there is known an anchor-type tool that has a plurality of hook-like claws and is adapted to hook and collect aquatic plants using the claws.

(Problems to be Solved by the Invention) However, it is extremely difficult to collect aquatic plants that are distributed on the water surface or in the water using the pillar-shaped or box-shaped slurry collectors as described above. Furthermore, when collecting aquatic plants for environmental surveys, etc., it is often necessary to simultaneously collect the bottom mud on which the aquatic plants grow, but with the anchor-shaped collecting tool mentioned above, it is not possible to collect the bottom mud. I can't. Therefore, when collecting underwater samples, it is necessary to prepare several types of sampling tools and use them depending on the purpose. Moreover, it is almost impossible to collect aquatic plants such as small floating plants using these collecting tools.

It may be possible to use a container such as a bucket to scoop out mud and aquatic plants, but when scooping with a container, the water flowing into the container may first cause the inside of the container to be scooped out. It is especially difficult to collect light samples such as floating plants because the collected material that has been taken in will be pushed out.

The present invention was developed in view of these problems, and its purpose is to create an underwater sample collection tool that can collect both bottom mud and plants distributed on the water surface and in the water. It's about getting.

(Means for Solving the Problems) In order to achieve this object, in the present invention, the sampling tool is constituted by a container having a drainage hole in the bottom wall. The drain hole is opened and closed by an opening/closing plate which is overlapped with the bottom surface of the container and can be rotated along the bottom surface. The opening/closing plate is fixed at any rotational position by a fastener. A plurality of hooking claws are provided on the opening surrounding wall at the upper end of the container. Moreover, the container is adapted to be towed by a rope.

(Function) With this configuration, if the opening/closing plate is rotated to open the drain hole and the container is pulled by the rope, the water that has flowed into the container will flow out from the drain hole. However, aquatic plants etc. are left in the container. Therefore, even light samples can be collected. Furthermore, by adjusting the opening degree of the drain hole, even small samples can be collected.

When collecting relatively heavy samples such as bottom mud,
All you have to do is scoop it into the container with the drain hole almost closed.

In either case, the sample can be easily caught by the hook provided on the peripheral wall of the opening of the container, so that efficient sampling can be performed.

(Example) Hereinafter, an example of the present invention will be described using the drawings.

The figures show an embodiment of the underwater sample collection device according to the present invention, in which Fig. 1 is a partially cutaway front view thereof, and Figs. 2 and 3 are a bottom view and an exploded perspective view thereof. . Moreover, FIG. 4 is an explanatory diagram showing the usage state of the sampling tool.

As is clear from FIGS. 1 to 3, this collection tool 1 includes a cylindrical container 2 with an open top surface. The bottom wall 2a of this container 2 has a plurality of drain holes 3, 3, . . . at regular intervals in the circumferential direction.
is provided. The interval is larger than the diameter of the drain hole 3. Further, in the center of the bottom wall 2a, there is a screw 4 that protrudes perpendicularly from the bottom surface.
are integrally provided.

A disk-shaped opening/closing plate 5 having a relatively large thickness is attached to the bottom side of the container 2. This opening/closing plate 5 has a drain hole 3 of the container 2,
At positions corresponding to holes 3, . . . , through holes 6, 6, . . . having the same shape are provided. In addition, the opening/closing plate 5
An insertion hole 7 into which the screw 4 is inserted is provided in the center of the housing. Therefore, the opening/closing plate 5 can be rotated around an axis perpendicular to the bottom surface of the container 2, that is, around the screw 4. By tightening the wing nuts 8 to the screws 4, the opening/closing plate 5 and the container 2 can be fixed in a state where the opening/closing plate 5 is superimposed on the bottom surface of the container 2. In this manner, in this embodiment, these screws 4 and wing nuts 8 constitute a fastening tool for fixing the opening/closing plate 5 to the container 2.

A plurality of hooking claws 9, 9, . . . are welded to the outer surface of the opening surrounding the upper end of the container 2. The claw 9 has a relatively long overall length, and its upper end is curved outward. Furthermore, rods 10, 10 are welded to the side surface of the container 2 at both ends of its diameter, respectively. This rod 10 is a plate-shaped member having a small width and a sufficiently long length, and is designed to extend sufficiently from the container 2 both upward and downward. Rope connecting holes 12, 12 are provided at the upper ends of these rods 10, 10 to which both ends of a relatively short rope 11 are connected. A longer rope 13 is connected to the rope 11. Thus, by the upper end of the rod 10, the rope 1 for towing the container 2 is
A rope connecting portion is configured to connect 1 and 13.

When collecting aquatic plants using the underwater sample collection tool 1 configured as described above, first, the opening/closing plate 5 is rotated around the screw 4, and the through holes 6, 6,
. . . and the drain holes 3, 3, . . . of the container 2 are aligned. Then, the drain holes 3, 3, . . . will be completely opened. Then, the wing nut 8 is tightened to fix the opening/closing plate 5. Then, a long rope 13 is tied to the collecting tool 1, and the collecting tool 1 is dropped from a boat 14 or from the shore as shown in FIG.

Since the sampling tool 1 has a large specific gravity due to the thick opening/closing plate 5 and the like, it quickly sinks when dropped into water. When it reaches the bottom of the water, no matter what condition it lands on, it will always roll over as shown in FIG. 4 because of the rod 10. Therefore, rope 1
Attract 3. Then, the plants on the bottom of the water are scooped into the container 2.

At this time, water also flows into the container 2, but the water flows through the drain holes 3, 3, . . . provided in the bottom wall 2a.
It flows backward through... Therefore, the scooped-in plants will not flow out from the intake opening of the container 2. Plants larger than the diameter of the drainage hole 3 are blocked by the bottom wall 2a of the container 2 and left inside the container 2. Large plants that cannot fit inside the container 2 are collected by being caught by the claws 9, 9, .

When the rope 13 is pulled up further, the collection tool 1 is pulled up onto the boat 14. Even during this period, water is flowing from the intake opening of the container 2 to the drain hole 3.
The collected plants will not float up and be washed away. In this way, plants from the bottom of the water can be collected reliably and efficiently.

When collecting plants floating on the water surface or in water, the collecting tool 1 may be submerged to a predetermined depth and then pulled up. In addition, when collecting small plants, the through holes 6, 6 of the opening/closing plate 5,
. . . and the drain holes 3, 3, . . . of the container 2 may be adjusted to narrow the drain holes 3.

When collecting bottom mud, the opening/closing plate 5 is rotated so that the drain hole 3 of the container 2 is almost closed as shown in FIG. Then, perform the same operation as when collecting underwater plants. Also at this time, since water flows out from the drain hole 3, the bottom mud flows toward the bottom wall 2a of the container 2. In addition, the action of scooping up mud from the bottom is strengthened by the claws 9. Therefore, bottom mud can be collected efficiently. Since the drain hole 3 is sufficiently constricted, the collected bottom mud will not flow out from there.

In lakes and marshes, mud sampling may be conducted at multiple survey points. In such cases, the sampling equipment must be cleaned after each sampling. In such a case, in the sampling tool 1 according to the present invention, the inside of the container 2 can be cleaned by simply rotating the opening/closing plate 5 to open the drain hole 3 and moving the container 2 up and down several times in water. Therefore, the cleaning work can be easily done in a very short time.

In the above embodiment, the opening/closing plate 5 is assumed to rotate around the screw 4 provided at the center of the bottom surface of the container 2. It can also be made to move. Further, the through hole 6 of the on-off valve 5 may also have a different shape from the drain hole 3 of the container 2. In this way, the flow of water within the container 2 can be finely adjusted. In such a case, it is also possible to prepare several types of opening/closing plates 5 with different plate thicknesses and shapes of through holes 6, and to use them by replacing them as appropriate.

(Effects of the invention) As is clear from the above explanation, according to the invention, a drainage hole is provided in the bottom wall of the container, and the drainage hole can be opened and closed by an opening/closing plate. The underwater sample collection tool can easily and efficiently collect both bottom mud and aquatic plants. Therefore, one collection tool is sufficient for collecting underwater samples for environmental surveys, etc.
The preparation etc. will also be extremely easy.

Furthermore, since the sampling tools can be easily cleaned, the sample collection work can be completed in a short time.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of an underwater sample collection tool according to the present invention, FIG. 2 is a bottom view of the collection tool, and FIG. 3 is an exploded perspective view of the collection tool. FIG. 4 is an explanatory diagram showing how the sampling tool is used. 1... Underwater sample collection tool, 2... Container, 2a...
...bottom wall of the container, 3...drain hole, 4...screw (shaft and fastener), 5...opening/closing plate, 8...wing nut (fastener), 9...hanging claw, 10 …
...rod, 11...rope, 12...rope connection hole, 13...rope.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A container having a drainage hole in the bottom wall and a plurality of hooks in the circumferential wall of the opening at the upper end; An opening/closing plate that can open and close the drain hole by rotating around an axis perpendicular to the bottom surface of the opening/closing plate; a fastener that can fix the opening/closing plate to the container at any rotational position; An underwater sample collection device, comprising: a rope connection part to which a rope for towing can be connected; (2) A rod is attached to the side surface of the container that extends vertically from the container and turns the container over when it lands, and the rope connection portion is constituted by the upper end of the rod. An underwater sample collection tool according to claim 1 of the patent registration claim.