JPH02103439A - Underwater-specimen collecting device - Google Patents

Abstract

PURPOSE:To make it possible to pick up a specimen readily by turning an arm which is provided with a lid body and mounted on the side part of a tubular body for picking up the specimen, moving the arm is the axial direction of the tubular body, the closing the opening end of the tubular body. CONSTITUTION:Before a specimen is picked up, an arm 3 is turned to a position where a lid body 7 and an upper cap 22 are separated far away from the opening end of a water collecting tube 5. The arm 3 is engaged at this position. Then, a specimen collecting device 1 is lowered with a rope 4 at an investigating point. When the water collecting tube 5 reaches the intended position, the arm 3 is disengaged. Then, the arm 3 is turned to a position where the lid body 7 and the upper cap 22 face the opening end of the water collecting tube 5. The opening end of the water collecting tube 5 is closed in a watertight manner. Therefore, the water at that depth is always picked up in the water collecting tube 5.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is for collecting underwater samples such as water at arbitrary depths in water bodies such as lakes, rivers, inner bays, and the open ocean, as well as sediments deposited on the bottom of the water. The present invention relates to an underwater sample collector for use in water, and in particular to an underwater sample collector that collects a sample using a cylindrical body suspended in water.

(Conventional technology) When conducting water quality surveys or environmental surveys, underwater samples such as water at a predetermined depth or bottom mud deposited on the bottom of the water are collected, and their chemical composition, inhabiting animals and plants, and microorganisms are collected. It is necessary to investigate and analyze the types, numbers, etc. Collecting such underwater samples is generally accomplished by suspending a sampler from one's body via a robe. In that case, the sample collector must be able to smoothly take in the desired underwater sample. Therefore, generally, such underwater sample collectors are made of a cylindrical body with both ends open.

For example, when collecting underwater sediments such as bottom mud, columnar sediment collectors are often used. This mud collector is equipped with a cylindrical core holder with both upper and lower ends open, and is dropped from above by connecting lobes. When the mud is applied correctly,
The bottom end of the core holder sticks to the bottom of the water. The water in the core holder then flows out from its upper end. therefore,
The bottom sediments are reliably incorporated into the core holder.

In such a cylindrical sample collector, it must be ensured that the collected sample does not fall when the sample is lifted onto the body by the lobe. Therefore, in the case of a columnar sediment collector, a check valve is provided at the upper end of the core holder, and the open upper end of the core holder is opened and closed by the check valve. When the material in the core holder, that is, the core, is about to fall, the check valve closes, creating a negative pressure inside and preventing it from falling.

Conventional columnar sediment collectors were designed to be pulled up with the bottom end open.

On the other hand, when collecting water at a predetermined depth, a water sampler consisting of a cylindrical water sampling tube with both ends open is used. The water sampling pipe is suspended vertically or horizontally by lobes and is lowered to a predetermined depth. When suspended vertically, water flows in from the lower end of the water sampling pipe and flows out from the upper end during its descent, so that when a predetermined depth is reached, water at that depth will be taken into the water sampling pipe. . Further, water sampling pipes that are suspended horizontally are usually used in rivers and the like with flowing water. In that case, water at a predetermined depth is taken into the water sampling pipe by the water flow.

In such a water sampler, when a predetermined depth is reached,
Both open ends of the sampling tube, especially the lower end, must be sealed watertight. Therefore, the water sampler is equipped with a lid that can close both ends of the water sample tube. The lids are set close to each open end of the water sampling tube, and are activated by dropping a small weight called a Metsusenja to close the ends. The tube is pressed against both ends of the water sampling tube by a coil spring or the like.

In a conventional water sampler, a coil spring or the like is inserted into a water sample tube.

(Problems to be Solved by the Invention) By the way, conventional columnar sediment collectors that pull up the core holder without closing the lower end of the core holder cannot handle sandy bottom mud, soft mud with a high water content, or water bottom with low viscosity. Even if you try to collect sediment, the core will gradually detach from the lower end of the core holder underwater before it can be lifted up.
Collecting such samples is extremely difficult. In order to make it possible to collect such samples, it is desirable that the lower end of the container be also closed with a lid, like a water sampler.

However, if a closing mechanism like a water sampler is applied to a columnar sediment sampler, a lid must be attached near the bottom end of the core holder, and the lid becomes an obstacle when the core holder is plunged into the bottom of the water. It ends up. Furthermore, it is necessary to provide a mechanism within the core holder for bringing the lid into close contact with the lower end of the core holder, and this mechanism prevents the core from entering.

On the other hand, in conventional water samplers, the mechanism that holds the lid open is located outside the water sampling tube, and the mechanism that keeps the lid tightly attached to the water sampling tube is located inside the water sampling tube, making it easy to remove the water sampling tube. I can't.

For this reason, even when water is sampled successively at survey points with different water quality, the water sampling tube cannot be replaced and the previously used water sampling tube must be used as is. Moreover, since a complicated mechanism is housed inside the water sampling pipe, it is difficult to clean the inside thereof.

In this way, when the next water sampling is performed using a previously used water sampling tube that has not been thoroughly cleaned, the water that was taken in last time and adhered to the water sampling tube, as well as the microorganisms contained in that water, etc. This contaminates the newly introduced water.

Generally, when conducting a water quality survey, the nutrients, heavy metals, organic matter, microorganisms, etc. contained in the water are issues.
Test tubes, beakers, etc. used in investigations need to be cleaned with acid. Therefore, accurate investigation cannot be performed with water sampled through such contaminated water sampling pipes.

Furthermore, conventional mud samplers and water samplers are dedicated to each.
It was not possible to use them simultaneously.

The present invention has been made in view of the above circumstances, and its purpose is to collect a sample from a cylindrical body without providing a special mechanism inside the cylindrical body or near its open end. The objective is to obtain an underwater sampler whose open end can be closed.

Another object of the present invention is to obtain an underwater sample collector whose cylindrical body for collecting a sample can be easily replaced and cleaned.

Still another object of the present invention is to obtain an underwater sampler that can be used as both a mud sampler and a water sampler.

(Means for Solving the Problems) In order to achieve this object, in the present invention, an arm is provided outside the outer peripheral surface of the cylindrical body from which the sample is collected, and a lid is attached to the tip of the arm. The open end of the cylindrical body is closed by the lid. The arm is rotated by a guide support mechanism between a position where the lid body is far away from the open end of the cylindrical body and a position where the lid body faces the open end at a distance, and The lid body is guided and supported so as to move in the axial direction of the cylindrical body until the lid body comes into close contact with the open end when the lid body reaches a position opposite to the open end. Moreover, the arm is biased so that the lid always moves toward the closed position, which is the open end of the cylindrical body. 1, the arm is locked and held at a position where the lid body is far away from the open end of the cylindrical body, and the lock is released when necessary.

The arm is supported, for example, by a frame that is detachably attached to the outer periphery of the cylindrical body.

(Operation) When collecting a sample using the underwater sample collector configured as described above, the arm is rotated to a position where the lid body is far away from the open end of the cylindrical body, and is locked at that position. In this state, no member exists near the open end of the cylindrical body. Therefore, the cylindrical body is suspended in this state. Then, when the cylindrical body reaches the target position, the arm is released from the lock. Then, the arm rotates to a position where the lid body faces the open end of the cylindrical body, and then
The lid body is moved so as to come into close contact with the open end. In this way, the open end of the cylindrical body is closed.

At this time, the lid moves in the axial direction of the cylindrical body and closes the open end, so that the open end is easily sealed watertight. In that case, if the lid is rotatable relative to the arm, processing errors can be absorbed. In addition, by doing so, the lid body does not become a resistance when being lowered into water.

Since the arm is provided outside the cylindrical body, there is no need to provide any member inside the cylindrical body. Therefore, the inside of the cylindrical body can be easily cleaned. Furthermore, if the arm is supported by a frame that is detachably attached to the outer periphery of the cylindrical body, it becomes easy to remove only the cylindrical body.

In this way, a sample is collected without any member inside the cylindrical body or near its open end, and the open end is sealed watertight, so this sample collector This makes it possible to collect both mud and water.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

1 to 5 show an embodiment in which the underwater sample collector according to the present invention is used as a water sampler.

As is clear from Figure 1.2, this underwater sampler 1
includes a frame 2 and an arm 3 supported by the frame 2. The frame 2 is suspended vertically by lobes 4. Further, a cylindrical water sampling pipe 5 with both ends open is attached to the frame 2 in the vertical direction. The water sampling pipe 5 is transparent and made of acrylic resin, and a drain port 6 for draining the collected water is provided at its lower part. The drain port 6 is normally closed with a plug.

A lid 7 that can close the open lower end of the water sampling tube 5 is attached to the tip of the arm 3. And that arm 3
The upper rotation position where the lid 7 is far away from the lower end of the water sampling tube 5 as shown in FIG. It is supported so as to be movable between a closed position and a closed position.

The frame 2 includes an upper support stand 8 and a lower cylindrical body attachment part 9.
It is equipped with The upper support stand 8 and the cylindrical body attachment part 9 are substantially rectangular in plan view, and are connected and fixed to each other at their four corners by support columns 10.degree. 10, . . . .

As shown in FIGS. 3(A) and 3(B), the upper support base 8 is provided with a hook 11 on the upper surface of the central portion thereof to connect the lobe 4. As shown in FIGS. Moreover, on the upper support stand 8,
A lid actuation member 12 is supported. The lid operating member 12
The upper plate 13 located above the upper support stand 8 and the lower plate 14 located below the upper support stand 8 are connected by two rods 15,
The rods 15, 15 are fitted to the upper support base 8 so as to be vertically movable. and,
The coil spring 16 compressed between the upper plate 13 and the upper support base 8 always urges upward.
It is normally kept in the state shown.

A lobe insertion hole 17 is provided in the center of the upper plate 13, and a small weight mesenger 18 (see Fig. 1.2) that falls along the lobe 4 inserted into the insertion hole 17 is inserted into the upper plate 13. By abutting against the coil spring 16, the lid actuating member 12 descends against the coil spring 16.

Two locking pins 19 and 20 extending upward are erected on the lower plate 14 of the lid operating member 12. The locking bottle 19
．． 20 has a height sufficient to penetrate and project upwardly through the upper support base 8 when the lid actuating member 12 is in its normal upper position. Further, when the lower plate 14 is lowered due to the contact of the upper plate 13 with the messenger 18, the lower plate 14 is retracted below the upper surface of the upper support base 8.

Furthermore, the upper end of a long support rod 21 extending downward is fixed to the center of the upper support base 8. Its support rod 2
1 is slidably fitted with a hollow pipe 23 erected at the center of the upper surface of an upper lid 22 that can close the open upper end of the water sampling pipe 5. A coil spring 24 is compressed between the upper support base 8 and the upper lid 22 on the outer periphery of the hollow vibe 23 to press the upper lid 22 downward. In this way, the upper lid 22 is supported so as to be able to move up and down with respect to the frame 2, and is also pressed toward the upper end of the water sampling tube 5.

The upper lid 22 can be attached by hooking the upper end of a locking string 26 (see FIG. 1) tied to a hook 25 provided on the upper surface of the upper lid 22 to a locking pin 19 projecting above the upper support base 8. It is adapted to be locked and held at a position upwardly away from the upper end of the water sampling pipe 5. That is, in this embodiment, the locking pin 19 and the locking string 26 constitute a top cover locking means for locking and holding the top cover 22 in the raised position.

The upper lid 22 is provided with a sealing plate on its lower surface side, which is made up of a sponge rubber plate 27 and a resin sheet 28 such as a silicone sheet having water-repellent properties, and when pressed against the upper end of the water sampling pipe 5, the upper end becomes watertight. It is designed to be sealed.

Further, the upper lid 22 is provided with an air intake port 29 through which collected water is removed from the water sampling tube 5. The air intake port 29 is normally sealed by a plug 30.

As shown in FIGS. 4(A) and 4(B), a fitting hole 31 into which the water sampling pipe 5 is fitted is provided in the cylindrical body mounting portion 9 at the lower part of the frame 2. The water sampling pipe 5 is removably attached to the frame 2 by fitting into the fitting hole 31 and tightening a set screw 32 from the outer peripheral side of the attachment part 9. In order to fix the water sampling tube 5 at an accurate position at that time, a positioning protrusion 33 is provided on the outer periphery of the water sampling tube 5.

Guide plates 34.3 are provided on both sides of the cylindrical body mounting portion 9.
4 is fixed. The guide plate 34 has a semicircular guide surface 35 whose diameter is arranged in the vertical direction, and a linear guide groove 36 extending upward from the lower end of the semicircular guide surface 35. A short horizontal support shaft 37 is fixed to the center of the semicircular guide surface 35 of the guide plate 34.

On the other hand, the arm 3 supported by the frame 2 is provided with a long hole 38 extending in the axial direction of the arm 3 at its base end. Then, a guide plate 34 is inserted into the elongated hole 38.
A support shaft 37 fixed to is inserted therethrough.

Further, a guide bin 39 is attached to the arm 3 at a position away from the proximal end of the elongated hole 38 by a distance equal to the radius of the semicircular guide surface 35 of the guide plate 34 . The guide bin 39 has a diameter that allows it to be inserted into the linear guide groove 36 of the guide plate 34.

In this way, the arm 3 rotates about the support shaft 37 as the guide bin 39 moves while engaging with the semicircular guide surface 35 of the guide plate 34, and the arm 3 rotates to the lowest position and guides the arm 3. Bin 39 is linear guide groove 3
6, the guide bin 39
By moving along the guide groove 36, it is possible to move upward in the axial direction of the water sampling tube 5. That is, the arm 3 is moved by the guide plate 34, the support shaft 37, the elongated hole 38 of the arm 3, and the guide bin 39.
A guide support mechanism is configured to support the arm 3 while causing it to rotate and move in the axial direction in a predetermined manner.

The base end side of the arm 3 is bent at an angle with respect to the axis of the arm 3. A connecting portion 41 for connecting one end of a rubber string 40, which is an elastic body, is provided at the tip thereof. Furthermore, a protrusion 42 for guiding the rubber cord 40 is provided at the base end of the arm 3. The other end of the rubber string 40 is connected to a connecting portion 43 (
(see Figure 3). The rubber string 40 is stretched under tension. When the arm 3 is in the upwardly rotated state as shown by the solid line in FIG. 4(A), the rubber string 40 is engaged with the protrusion 42 of the arm 3. Therefore, a biasing force is applied to the arm 3 to cause it to rotate downward. When the arm 3 rotates to the lowest position as shown by the imaginary line in FIG. 4(A), the arm 3
A biasing force is applied to pull it upward.

The length from the elongated hole 38 to the tip of the arm 3 is longer than the length from the support shaft 37 of the guide plate 34 to the lower end of the water sampling tube 5.

As shown in FIG. 5, the lid that closes the lower end of the water sampling tube 5 faces the lower end of the water sampling tube 5 with a small interval when the arm 3 is rotated to the lowest position. When the arm 3 rises from this position along the guide groove 36, it is attached to a position where it comes into close contact with the lower end of the water sampling pipe 5.

The lid body 7 is rotatably supported by horizontal pins 44.44 attached to the arms 3.3 on both sides about a diametrical axis perpendicular to the plane of rotation of the arms 3. Both sides of the lid body 7 are constituted by seal plates made of sponge rubber 45 and a resin sheet 46 such as a silicone sheet having water-repellent properties.

A hook 49 for connecting one end of a locking string 48 is provided at the center of a connecting plate 47 that connects the tips of the arms 3.3 to each other. As shown in FIG. 1, the other end of the locking string 48 is hooked onto the locking pin 20 protruding above the upper support base 8 at the position where the arm 3 has rotated most upward. , so that the arm 3 is locked at that position against the biasing force of the rubber string 40.

That is, the locking bottle 20 and the locking string 48 constitute a locking means for locking and holding the arm 3 at a position where the lid 7 is far away from the lower end of the water sampling tube 5.

Next, the operation of the underwater sample collector 1 configured as described above will be explained.

When sampling water for water quality surveys etc., first attach the frame 2 to the water sampling pipe 5, and then attach the frame 2 to the hook 1 on the upper support stand 8.
Tie robe 4 to 1. The lobe 4 is inserted into a lobe insertion hole 17 formed in the upper plate 13 of the lid operating member 12. Then, attach the top cover 22 to the coil spring 24.
Push up against the force and hook the locking string 26 onto the locking bottle 19. Further, the arm 3 is rotated upward against the elastic force of the rubber string 40, and the locking string 48 at the tip is hooked onto the locking bottle 20. At this time, the rubber string 40 is attached to the protrusion 42 of the arm 3.
, and becomes bent.

In this way, the underwater sample collector 1 is set in the state shown in FIG. 1 in which the upper lid 22 and the lid body 7 are both separated from the open end of the water sampling tube 5.

The sample water sampler 1 set in this manner is suspended from the body by the robe 4 at the survey point. At that time, the water sampling pipe 5 is oriented in the vertical direction due to gravity. While descending into the water, the lid 7 contacts the frame 2 and the like and is maintained in the vertical direction, so the resistance due to the lid 7 is small. Therefore, the water sampling pipe 5 will not tilt.

When the water sampling pipe 5 descends in this manner, water flows into the water sampling pipe 5 from the lower end and flows out from the upper end. therefore,
Water at that depth is always drawn into the water sampling pipe 5. Moreover, since there are no obstacles on the lower end side of the water sampling pipe 5 and inside thereof, and the upper cover 22 on the upper end side is also sufficiently far away, the water can be taken in extremely smoothly.

When a predetermined depth is reached, the messenger 18 is dropped along the lobe 4. Then, the messenger 18 comes into contact with the upper plate 13 of the lid operating member 12, and the coil spring 1
6, the lid actuating member 12 is lowered. Lid operating member 1
2 is lowered, the locking pins 19, 20 attached to the lower plate 14 are retracted below the upper surface of the upper support base 8. As a result, the locking strings 26.48 that were locked to the locking pins 19, 20 are separated. Therefore, the arm 3 and the upper lid 22 are unlocked. That is, in this underwater sample collector 1, the lid operating member 12 and the messenger 18 constitute a lock release means.

A biasing force is applied to the proximal end of the arm 3 by a rubber string 40 to pull it upward. Therefore, when the lock of the arm 3 is released, the arm 3 moves toward the base end side or upward. At this time, the guide bin 39 of arm 3
is engaged with the semicircular guide surface 35 of the guide plate 34, so the arm 3 rotates about a support shaft 37 provided at the center of the guide surface 35. As a result, the lid 7 attached to the tip of the arm 3 moves on a semicircular trajectory with a constant radius. Since the radius is larger than the distance from the support shaft 37 to the lower end of the water sampling tube 5, when the arm 3 is rotated to the lowest point parallel to the axial direction of the water sampling tube 5, it is shown in FIG. As shown, the lid 7 faces the lower end of the water sampling tube 5 at a distance. During this period, even if the lid 7 is in the vertical direction, when the arm 3 rotates downward, the lid 7 contacts the lower end of the water sampling tube 5 and rotates around the horizontal bottle 44, 44. The lid body 7 is rotated so that one of the surfaces of the lid body 7 faces the open lower end surface of the water sampling tube 5.

When the arm 3 is rotated to the position where the lid 7 faces the lower end of the water sampling tube 5, the guide bin 39 of the arm 3 is guided as shown by the imaginary line in FIG. 4(A). The position is opposite to the linear guide groove 36 of the plate 34. A force is applied to the arm 3 by the rubber string 40 to pull it upward, and since the arm 3 is engaged with the support shaft 37 through the elongated hole 38 in the axial direction, the arm 3 moves upward in its axial direction. At this time, the guide bin 39 of the arm 3 is attached to the guide plate 34.
By engaging with the linear guide groove 36 of the arm 3
The moving direction of is regulated to be parallel to the axial direction of the water sampling tube 5.

When the arm 3 moves upward in the axial direction of the water sampling tube 5 in this manner, the lid 7 attached to its tip also moves in the same direction. Then, the lid 7 comes into contact with the lower end of the water sampling tube 5. Since the lid body 7 is rotatably supported,
At this time, the lid body 7 rotates slightly and always comes into close contact with the lower end of the water sampling tube 5. Moreover, since seal plates are provided on both sides of the lid 7, the open lower end of the water sampling tube 5 is closed in a watertight manner by the close contact of the seal plates.

On the other hand, when the upper lid 22 is unlocked, the upper lid 22 is moved downward by the biasing force of the coil spring 24. Then, it is pressed against the upper end of the water sampling pipe 5. Since a sealing plate is provided on the lower surface of the upper lid 22, the open upper end of the water sampling tube 5 is sealed thereby.

In this way, as shown in FIG. 2, both upper and lower ends of the water sampling tube 5 are closed by the upper lid 22 and the lid body 7, respectively. Water at a predetermined target depth is taken into the water sampling pipe 5. Then, the sample collector 1 is pulled up onto the body using the lobe 4.

For personal use, the stopper 30 of the upper lid 22 is removed, the drain port 6 at the bottom of the water sampling tube 5 is opened, and the collected water is transferred from the drain port 6 to another container such as a beaker. And top lid 2
2, and in the raised position lock the locking string 26 to the locking bottle 19.
to be locked. Further, after the arm 3 is once pulled down, it is rotated upward and the locking string 48 is locked to the locking bottle 20 at the upper rotational position shown in FIG. Next, the set screw 32 is loosened, the water sampling tube 5 is removed, and a new cleaned water sampling tube 5 is attached. In this way, preparation for the next water sampling is completed. Note that the used water sampling tube 5 can be cleaned while attached to the frame 2 and used as it is for the next water sampling. Even in that case, since there are no members inside the water sampling tube 5, the inner surface can be easily cleaned.

Moreover, when performing mud sampling, a core holder is attached in place of the water sampling pipe 5. The core holder is a simple cylindrical body without a drain port 6. Then, set it up in the same way as when collecting water and drop it from your body. When it reaches the bottom of the water, the bottom end of the core holder pierces the bottom mud due to its own weight. Therefore,
The messenger 18 is dropped to release the arm 3 and upper lid 22 from locking. Then, the arm 3 rotates downward and the upper end of the core holder is closed by the upper lid 22. The arm 3 that has rotated downward is held in contact with the bottom of the water.

The sample collector 1 is then pulled up by the lobe 4. Then, the core holder that has taken in the bottom sediment is removed from the bottom of the water. At this time, the upper end of the core holder is sealed by the upper lid 22, and if the sample tries to fall from the lower end, a negative pressure is created inside the core holder, so the core holder is always pulled up with the sample taken in. Then, the arm 3 further rotates and then moves upward in the axial direction of the core holder, so that the lower end of the core holder is sealed by the lid 7. Therefore, the collected sample, ie, the core, will not come off from the lower end of the core holder underwater during pulling. In other words, it is also possible to collect sand and mud.

In addition, since strict watertightness is not necessarily required for closing the upper end of the water sampling pipe 5, etc. with the upper lid 22, the coil spring 24 that presses and biases the upper lid 22 is omitted, and the upper lid 22 is made to fall only by its own weight. You can also.

Fig. 6.7 shows an embodiment in which the present invention is applied to a driving-type slurry collector (see Utility Model Application Publication No. 193545/1983) proposed earlier by the present inventor.

As is clear from these figures, this mud collector 50 includes a cylindrical core holder 51 and a core holder catcher 52 that supports the core holder 51. The core holder 51 is removably attached by fitting its upper end into a catcher 52 and tightening a set screw or the like from the outer circumferential side of the catcher 52. A valve plate 53 that can open and close the open upper end of the core holder 51 is provided in the catcher 52 so as to be movable up and down.

Further, a large diameter opening 54 is formed in the peripheral wall of the catcher 52.

A long rod 55 is fixed to the upper end surface of the catcher 52. A weight 56 is supported by the rod 55 so as to be movable up and down. The weight 56 is moved up and down from the body by a robe 57.

Furthermore, guide plates 59 having support legs 58 extending upward are attached to both sides of the outer periphery of the catcher 52. A semicircular guide groove 60 and a linear guide groove 61 extending upward in the axial direction from the lower end of the semicircular guide groove 60 are formed in the lower part of the guide plate 59 . A support shaft 62 is fixed at the center of the semicircular guide groove 60, and an arm 64 is supported by the support shaft 62 via an elongated hole 63. A guide bin 65 is attached to the arm 64, and the guide bin 65 is guided along the guide grooves 60, 61.

One end of a rubber string 66 is connected to the base end side of the arm 64. The other end of the rubber string 66 is connected to the upper end of the support leg 58 of the guide plate 59. And arm 6
The rubber string 66 is adapted to engage with a protrusion 67 provided on the rubber cord 4.

A lid 68 that can close the open lower end of the core holder 51 is rotatably supported at the tip of the arm 64. Further, one end of a locking string 69 is connected to the tip of the arm 64. The other end of the locking string 69 is adapted to be hooked onto a locking pawl 70 provided at the upper end of the rod 55. Then, the locking claw 70 is pushed down by the messenger 72 falling along the lobe 71, and the locking string 6
9 are to be released. The lobe 71 is connected to the upper end of the rod 55 and suspends the entire mud sampler 50.

The other structure of the lower end closing mechanism for closing the lower end of the core holder 51 is similar to the lower end closing mechanism of the water sampling tube 5 in the sample collector 1 shown in FIGS. 1 to 5.

When collecting bottom sediment using the sediment sampler 50 configured in this manner, the arm 64 is rotated upward and the locking string 69 is connected to the locking claw 70 as shown in FIG. hook it on. As a result, the arm 64 is locked at a position where the lid 68 is far away from the lower end of the core holder 51.

In this state, the mud collector 50 is suspended by the lobes 71. Then, when the lower end of the core holder 51 reaches the bottom of the water,
The lobe 71 is loosened, and the lobe 57 connected to the weight 56 is also loosened, causing the weight 56 to fall. Then, the weight 56 comes into contact with the upper end surface of the core holder catcher 52, and the lower end of the core holder 51 is driven into the bottom of the water.

At this time, the water in the core holder 51 pushes up the valve plate 53 placed on the upper end thereof and flows out from the opening 54 formed in the peripheral wall of the catcher 52. Therefore, the bottom sediment is taken into the core holder 51 .

After repeating such driving of the core holder 51 with the heavy S-shaped bolt 56 several times, the Metsusenger 72 is dropped.

Then, the locking of the locking string 69 by the locking claw 70 is released, and the arm 64 is rotated downward by the biasing force of the rubber string 66. The arm 64 is held with its tip engaged with the bottom of the water.

Then, the mud collector 50 is pulled up using the lobes 71, and the core holder 51 is pulled out from the bottom of the water. At this time, the valve plate 5
3 has fallen and is blocking the upper end of the core holder 51,
The core taken into the core holder 51 will not fall.

When the core holder 51 is completely pulled out from the bottom of the water, the arm 64 further rotates and then moves upward in the axial direction of the core holder 51, so that the lower end of the core holder 51 is pulled out as shown in FIG. It is closed by a lid body 68. At this time, the lid 68 moves in the axial direction of the core holder 51 and closes its lower end, so that the lower end is reliably sealed. Therefore, even if the sampled water bottom sediment is sandy or soft mud with a high water content, it will not fall from the bottom end of the core holder 51 while the sediment sampler 50 is being pulled up, and accurate samples can be obtained. Collection becomes possible.

In this way, if the present invention is applied, the driving-type mud collector 5
0, it becomes possible to close the lower end of the core holder 51.

Figure 8.9 shows a different example of the arm guide support mechanism.

In the guide support mechanism shown in FIG. 8, an arm 80 is provided with a semicircular guide surface 81 and a linear guide groove 82. A frame 83 attached to the outer periphery of the cylindrical body from which a sample is collected is provided with a guide bin 84 that can engage with the guide surface 81 and guide groove 82 .

The arm 8o is supported by a support shaft 85 fixed to the frame 83 at the center of the semicircular guide surface 81 through an elongated hole 86.

Further, in the guide support mechanism shown in FIG. 9, the arm 90 is provided with a semicircular guide surface 91 and a linear guide groove 92, and the frame 93 is provided with a guide bin 9.
4 is provided. A support shaft 95 is fixed to the arm 90 at the center of the semicircular guide surface 91.
The support shaft 95 is inserted into an axially elongated hole 96 provided in the frame 93 and supported.

With these guide support mechanisms, if an upward biasing force is applied to the left end of the arm 80.90 in the figure, the arm 80.90 will rotate clockwise in the figure and then move upward in the axial direction. It will be obvious that you will be guided to do so.

In addition, in the above example, one rubber string 40.66
Although the arm 3.64 is provided with a biasing force to rotate downward and a biasing force to move upward in the axial direction, these biasing forces can also be applied by two coil springs.

Furthermore, the present invention is applicable not only to a sample collector in which the cylindrical body is supported in the vertical direction and suspended as in the above embodiment, but also to a horizontal water sampler in which the water sampling tube is supported in the horizontal direction. can do. In that case, for example, two arms with lids attached to their tips are provided, and the arms are rotated upward and locked together, and the locks are released using a messenger etc. The arm may be rotated and moved in the axial direction to close both ends of the water sampling tube with the respective lids.

(Effects of the Invention) As is clear from the above description, according to the present invention, an arm with a lid attached to the tip is attached to the side of a cylindrical body from which a sample is collected, and the arm is rotated. Since the open end of the cylindrical body is closed by moving the cylindrical body in the axial direction of the cylindrical body, there is no need to provide any member inside the cylindrical body or near the open end. The open end of the body can be sealed. Therefore, the sample can be taken in smoothly, and the inside of the cylindrical body can be easily cleaned. Furthermore, since the lid moves in the axial direction of the cylindrical body to close the open end of the cylindrical body, it is easy to close the cylindrical body in a watertight manner. Therefore, it is possible to collect not only sandy bottom mud and soft mud with a high water content, but also water. In other words, it becomes possible to use the slurry sampler as a water sampler.

Furthermore, the arm can be supported by a frame that is detachably attached to the outer periphery of the cylindrical body. This makes it easy to replace the cylindrical body. Therefore, it becomes possible to collect samples one after another at different survey points.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of an underwater sampler according to the present invention.
Figure 2 is a side view showing the sample collector set for sample collection; Figure 2 is a side view showing the sample collector with both ends of the cylindrical body closed; Figures 3 (A) and (B) are , a longitudinal side view and a longitudinal front view showing the upper part of the sample collector; Figure 4 shows the guide support mechanism of the arm of the sample collector; (A) shows the state in which the arm is rotated upward; (B) is a longitudinal sectional front view showing the state in which the arm of the sample collector is rotated downward, and Figure 5 is a state in which the arm of the sample collector is rotated downward. Fig. 6 is a side view showing an example of a driving-type slurry collector to which the present invention is applied in a set state, and Fig. 7 shows a state in which the lower end of the slurry collector is closed. FIG. 8.9 is an explanatory view showing a modification of the arm guide support mechanism. 1... Underwater sample collector 2... Frame 3... Arm 5...
・Water sampling pipe (cylindrical body) 7... Lid body 2... Malfunctioning member (lock release means) 8... Metsusenja (lock release means) 9.20...
Locking bottle (locking means) 2... Upper lid 6... Locking string (upper cover locking means) 4... Guide plate (guiding support mechanism) 5... Semicircular guide surface 6... Linear guide groove 7... Support shaft (guiding support mechanism) 8... Long hole (guiding support mechanism) 9... Guide bin (guiding support mechanism) 0... Rubber string (elastic body) 42...・Protrusion 4...
・Horizontal bin 48... Locking string (locking means) 50... Sludge sampler (underwater sample collector) 51... Core holder (cylindrical body) 52... Core holder catcher (frame) 59.・
・Guide plate 60... Semicircular guide groove 61... Straight guide groove 62... Support shaft 63...
・Long hole 64...Arm 65...Guide bin 66...Rubber string 67...Protrusion
68... Lid body 69... Locking string
70... Locking claw 72... Metsenger 8o... Arm 81... Semicircular guide surface 82... Straight guide groove 83... Frame 84... Guide bin 85... Support Axis 86...
- Long hole 90...Arm 91...Semicircular guide surface 92...Linear guide groove 93...Frame 94...Guide bin 95...Spindle 96...
・Long hole Fig. 3 (A) Fig. 5 (A) Fig. 4 (B) Fig. 8 Fig. 9

Claims (4)

[Claims] (1) A cylindrical body with at least one open end, which is suspended in water to collect a sample, and a cylindrical body provided outside the outer peripheral surface of the cylindrical body, with the open end of the cylindrical body at the tip. an arm to which a lid body capable of closing the cylindrical body is attached, and the arm is moved between a position where the lid body is far away from the open end of the cylindrical body and a position where the lid body faces the open end at a distance. When the lid reaches a position opposite to the open end, the lid is guided to move in the axial direction of the cylindrical body until the lid comes into close contact with the open end. a guide support mechanism that moves the arm from a position where the lid body is far away from the open end of the cylindrical body to a position where the lid body is in close contact with the open end, guided by the guide support mechanism; an elastic body for urging; a locking means for locking and holding the arm at a position where the lid is far away from the open end of the cylindrical body against the urging force of the elastic body; and the locking means. an unlocking means capable of releasing the lock of the arm by the underwater sample collector. (2) The underwater sample collector according to claim 1, wherein the lid body is rotatably supported around an axis perpendicular to the rotation plane of the arm. (3) The underwater sample collector according to claim 1 or 2, wherein the arm is supported by a frame that is detachably attached to the outer periphery of the cylindrical body. (4) Both ends of the cylindrical body are open, and the cylindrical body is vertically suspended and supported, and the open lower end is closed by the lid body, and the frame is attached to the frame. , an upper lid that closes the open upper end of the cylindrical body by being lowered is supported so as to be movable up and down, and the upper lid is held and held in the raised position by the upper lid locking means, and is locked by the locking means. 4. The underwater sample collector according to claim 3, wherein the two are simultaneously released by the unlocking means.