JPH07112399B2 - Method and apparatus for separating live fish - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for separating live fish swimming in a cage into other cages, and for example, it is cultivated in an indoor or outdoor farm. It is used to separate living fish into another cage that has a water level that is different from the water level of this farm.

(Prior art) Conventionally, a method of separating live fish cultivated in a farm tank into another cage having a water surface having a height difference with respect to the water surface of the farm tank is a method such as a fishing net from the fish tank or the farm tank. A method is commonly used in which live fish are scooped, transferred to a transport container once, and then transferred from this transport container to another cage to separate them.

Further, Japanese Utility Model Publication No. 60-26020 discloses a "pump device for transferring fish".

(Problems to be solved by the invention) However, according to the conventional method, it is necessary to scoop up the escaped fish using a fishing net or the like by a manual operation from the farm tank and transfer it to another cage. There is a problem in that it is complicated and the live fish is damaged and the survival time in the cage is shortened.

The device disclosed in Japanese Utility Model Publication No. 60-26020 is capable of efficiently transferring a large amount of fish separated from water to a container located above the fish tank. For example, a bladeless pump in which an impeller having a spiral flow path rotates. There is an advantage that there is less scratching of fish compared to the transfer method using a centrifugal rotary pump such as
In the field where live fish to be cultivated in a culturing tank is continuously cultivated even after being separated into another cage, the function of not damaging the live fish during transfer is of the utmost importance. Was inadequate and not available.

That is, the technique of the above publication sucks and pumps water and fish together, and since this suction force and pumping force are greater than the swimming ability of live fish, the obstacle avoidance behavior of live fish is obstructed and live fish come into contact with each other. However, there is a problem in that the commercial value of live fish is significantly reduced and the life of live fish during farming is significantly shortened.

The present invention has been made to solve the above-mentioned problems, and provides a method for separating live fish and an apparatus therefor, for example, having a water surface having a difference in height with respect to the water surface of a cultivation tank in which live fish are cultivated. The purpose is to let live fish swim in another cage and to separate them automatically without damaging them.

(Means for Solving the Problems) The first aspect of the present invention for achieving the above object is to provide a live fish cultivated in the first cage according to the second aspect of the invention. In the method of separating into the cage, the first cage and the second cage are connected to each other through a hollow connecting member having a hollow portion capable of lighting, and then the first cage is appropriately connected by means. A pressure difference is generated between the cage and the second cage, and water is flowed through a hollow portion of the connecting member where light is introduced to form water in the first cage. The water in the two cages is connected to each other, and the expelling means that is substantially movable back and forth in the first cage or the hollow portion of the connecting member is operated to expel the live fish from the first cage to connect the fish. Swim through the second cage to separate it This is a method for separating live fish, which is characterized in that

The second aspect of the present invention is directed to a hollow body which has an opening / closing opening and is capable of being sealed, a pipe which extends from the hollow body and communicates with a hollow portion of the hollow body, and the hollow body. A live fish separation device comprising a body or a decompression means connected to the pipe.

Further, the third aspect of the present invention is that the moving cage, which is capable of cultivating live fish and has an opening through which the live fish can swim in and out, can be moved back and forth under the surface of the cage. The live fish separation device is characterized in that a concave portion having a gradually increasing depth is formed on the surface facing the live fish.

In addition, as the expelling means that can be substantially moved back and forth in the first cage or in the hollow portion of the connecting member, a mover capable of moving forward and backward in the first cage or the hollow portion of the connecting member may be used. Alternatively, a sound wave generator, a water hammer device, or the like, which is arranged near the opening of the free tip portion or outside the connecting member so as to be able to advance and retreat in the axial direction of the connecting member, or a combination thereof may be used.

Further, as a means for causing water to flow into the hollow portion or the pipe of the connecting member used here to form a water channel, and for communicating the water in the first cage with the water in the second cage through this channel. , Supplying a high-pressure gas as a structure capable of sealing the first cage to raise the internal pressure of the first cage to a pressure higher than the internal pressure of the second cage to bring the water in the first cage into the pipe. It may be allowed to flow in and communicate with the water in the second cage, or alternatively, the second cage may be made a structure capable of being sealed and decompressed by appropriate means.
The internal pressure of the second cage may be increased above the internal pressure of the second cage to allow the water in the first cage to flow into the pipe to communicate with the water in the second cage. Furthermore, the structure of the second cage is such that it can be sealed so that the water level of the second cage is lower than the water level of the first cage to allow the water of the first cage to flow into the pipe. It may be connected to the water of the second cage.

(Operation) In the above-mentioned present invention, after connecting the first cage and the second cage through the hollow connecting member whose hollow portion can illuminate, the first cage and the second cage are appropriately connected to each other. When a differential pressure is generated between the water, water flows into the hollow portion of the connecting member where the light is introduced, and the water in the first cage and the water in the second cage are connected via the water channel. Then, when the ejecting means that can move back and forth in the first cage is moved toward the opening of the connecting member exposed to the first cage, the swimming space in the first cage is narrowed, so that the living space is alive. The fish moves to the hollow portion of the connecting member or the second cage. Subsequently, when the expelling means capable of advancing and retracting in the hollow portion of the connecting member is moved from the first cage side to the second cage side, the live fish in the hollow portion of the connecting member moves to the second cage. To do.

This allows the first fish cage to the second fish without damaging the live fish.
It has the function of being automatically separated into the cages of.

(Example) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

1 and 2 show the first embodiment of the live fish separating apparatus according to the present invention.
It shows an example.

Example 1 As a first cage, seawater was put in a water tank 1 having a bottomed box with an open top, and the water tank 1 had a size similar to the horizontal cross section of the water tank 1 at the bottom. A floatable / sinkable mover 2 including a rubber-made inflatable / hollow body 2a that is integrally attached to and circumferentially mounted on the lower surface of the edge portion of the grid-like plate body 2b is sunk.

The hollow body 2a and the pump 4 are connected to the rubber tube 3 via a valve (not shown) so that compressed air can be supplied from the pump 4 to the hollow body 2a via the tube 3 by switching the valve. ing.

Further, the floating lid 5 is floated by its own buoyancy on the water surface facing the mover 2 and can be moved up and down in the water tank as the water level rises and falls. A hole 5a through which live fish swimming in the water with the child 2 can pass is vertically penetrated.

On the other hand, as a live fish separating device, a transparent box body 7 with a bottom, which is appropriately separated from the water tank 1 and whose bottom is higher than the water surface of the water tank 1 and a part of the top wall 7a is opened, is provided. The opening 8 is covered and sealed with a lid 8 that allows the opening to be opened and closed.

The free distal end of a flexible hollow connecting member 6 made of rubber extending from the side wall 7b is connected to the upper surface of the floating lid 5 and penetrates the box body 7 and the floating lid 5. The holes 5a are communicated with each other through the connecting member 6, and the light can be introduced into the hollow portion of the connecting member 6 through the transparent box body 7.

Further, a vacuum pump 15 is connected via a tube 14 to a ceiling wall 7a which is appropriately separated from the lid 8, and the vacuum pump 15 can reduce the internal pressure of the box body 7 and the connecting member 6 via the tube 14. .

The volume of the water tank 1 is considerably larger than the volume of the box body 7 plus the volume of the hollow portion of the connecting member 6.

The inner diameter of the hollow portion of the connecting member 6 is substantially the same as that of the hole 5a, and the live fish swimming in the water between the floating lid 5 and the mover 2 can pass through. ing.

Further, an air cylinder 10 is attached to the side wall 7b at an appropriate distance from the communication port between the connecting member 6 and the box body 7.
10a penetrates the side wall 7b and is connected to a door 9 which can open and close a communication port between the connecting member 6 and the box body 7.

The output shaft 10a and the hole through which the output shaft 10a penetrates have a watertight structure via an O-ring.

Further, the door 9 is also structured to be watertight at the communication port.

Further, a tube 12 is extended upward on a ceiling side wall 7a which is appropriately separated from the tube 14 to communicate the inside of the box body 7 and the atmosphere outside the box body 7 through this tube 12, and the upper end thereof to a valve 13. By connecting and switching the valve 13, the inside of the box 7 and the atmosphere outside the box 7 can be freely connected or disconnected.

The tube 12 and the connecting member 6 are connected and communicated with each other through a tube 16, and the hollow portion of the connecting member 6 and the atmosphere can be freely connected or disconnected by switching the valve 13.

The operation of the above configuration will be described.

In order to separate the live fish from the aquarium 1 into the box 7, the valve 13 is switched to shut off the hollow part of the connecting member 6 and the inside of the box 7 from the atmosphere, and then the air cylinder 10 is operated to operate the output shaft 10a.
To the right to pull the door 9 away from the side wall 7b to open the communication port between the connecting member 6 and the box body 7 so that the connecting member 6 and the box body 7 communicate with each other so that the live fish in the aquarium 1 can move to the box body 7 To enter.

Next, when the vacuum pump 15 is operated to reduce the internal pressure of the box body 7 to the atmospheric pressure or lower through the tube 14, the seawater in the water tank 1 flows into the box body 7 through the connecting member 6 and is filled with the seawater.
The water in the water tank 1 and the water in the box body 7 communicate with each other via a water passage formed in the connecting member 6.

At this time, as the water level in the water tank 1 lowers, the floating lid 5 also floats on the water surface and lowers.

Further, since the volume of the aquarium 1 is sufficiently large, the seawater in the aquarium does not decrease so much that live fish cannot swim.

Then, the pump 4 is operated and the hollow body is inserted through the tube 3.
When compressed air is supplied to 2a, the mover 2 floats up and asymptotically approaches the float lid 5, and the living space for live fish between the float lid 5 and the mover 2 becomes smaller, and part of the live fish is formed on the connecting member 6. Swim and move into the waterway or box 7.

The mover 2 continues to float further, and finally comes into contact with the lower surface of the floating lid 5, and the water channel between the connecting member 6 and the water tank 1 is cut off, so that all the live fish are in the water channel formed in the connecting member 6 and the box body. Move to 7.

At this time, the number of live fish moving to the transparent box 7 is visually counted from the outside of the box 7, and when the number reaches a predetermined number, the air cylinder 10 is operated to move the output shaft 10a to the left and the door 9 The side wall 7b
After closing the communication port between the connecting member 6 and the box body 7 in close proximity to the valve body, the valve (not shown) is switched to release the air in the hollow body 2a into the atmosphere through the tube 3 and the mover 2 It sinks to the bottom of the water tank 1 under its own weight.

Then, the valve 13 is switched and the box 7 is inserted through the tube 12.
When the inside of the container is communicated with the atmosphere and the inside of the connecting member 6 is communicated with the atmosphere through the tube 12 and the tube 16, seawater and live fish in the water channel formed in the connecting member 6 fall due to gravity. Returned to the water tank 1.

Thus, the live fish has a function of separating into the aquarium 1 and the transparent box 7.

The live fish separated in the box 7 can be taken out by an appropriate means. For example, the lid 8 may be removed to open the opening formed on the top surface 7a, and a net may be inserted into the box body 7 through this opening to scoop live fish.

After taking out the live fish, the seawater remaining in the box body 7 can be returned to the aquarium 1 via the connecting member 6 by opening the door 9 and opening the communication port as described above.

In the above-described embodiment, the floating lid 5 may be made to float by moving the moving body 2 by mounting the hollow body 2a with the floating lid 5 made of a material that sinks under its own weight. This has the effect of omitting the mover 2.

Further, although the connecting member 6 is connected to the floating lid 5 in the above embodiment, it may be connected to the lowermost portion of the water tank 1.

At this time, compressed air is supplied to the hollow body 2a to float the mover 2 on the water surface in advance. (Fig. 3) In this case, when compressed air is removed from the hollow body 2a as described above, the mover 2 sinks to the bottom of the water.
Is separated into

Further, in the above-described embodiment, as a means for causing water to flow into the hollow portion of the connecting member to form the water channel, the pressure inside the hollow portion of the connecting member is reduced by the vacuum pump to allow the water to flow in, but as shown in FIG. Even if the water tank 1 having a sealable structure and the high-pressure gas supply device 11 are connected by a hollow tube 14 so that the high-pressure gas can be supplied from the high-pressure gas supply device 11 into the water tank 1, the connecting member is the same as the above embodiment. Water can be made to flow into the hollow portion of the box to form a water channel so that the water tank 1 and the box body 7 can communicate with each other.

At this time, a vacuum pump for reducing the internal pressure of the box body 7 is not required, and a level detector (not shown) capable of detecting the position of the water surface is provided at an appropriate position in the box body 7 to reach a predetermined water surface. It is advisable to work the high-pressure gas supply device 11 to maintain the internal pressure of the water tank 1. Then, when the mover 2 is submerged in the same manner as another embodiment (FIG. 3) of the above embodiment, the live fish can be separated into the box body 7 as in the above embodiment.

Furthermore, as a means for causing water to flow into the hollow portion of the connecting member to form a water channel, even if the water tank 1 is arranged at a higher position than the sealable box body 7 as shown in FIG. Since water can be made to flow into the hollow part of the connecting member to form a water channel and the water in the water tank 1 and the box body 7 can be communicated with each other, when the mover 2 is submerged in the same manner as described above, the live fish is fed into the box body 7 as in the above embodiment. Can be separated inside.

It should be noted that after moving into the water passage formed in the connecting member 6, the second moving element 22 described later is moved back and forth in the water passage, or alternatively, the free end of the connecting member 6 is exposed to the water in the water tank 1. When a sound or vibration is generated by hitting the part or the floating lid 5, the live fish feels a sense of crisis and takes an escape action, and the live fish can be quickly moved to and separated from the box body 7.

Further, in the above embodiment, the opening for taking out live fish is provided on the top surface 7a of the box body 7, but the present invention is not limited to this, and it may be set appropriately on the wall surface according to the application. Further, in the above embodiment, an example in which the live fish is once separated in the box body 7 is shown, but the present invention is not limited to this. For example, when directly transferring to a vehicle-mounted live fish tank in which water is sufficiently filled, the connecting member 6 made of a transparent or translucent material having a suction port from a vacuum pump connected to the highest point of the connecting member 6 is used. After the water tank 1 containing live fish is communicated with the live fish tank via the above, a water channel is formed and communicated in the same manner as described above to move and separate the live fish.

Needless to say, the water tank 1 can be equipped with a publicly available oxygen supply device, a filtration device, or the like.

Embodiment 2 FIGS. 6 to 9 show the second embodiment of the live fish separating apparatus according to the present invention.
It shows an example.

The same parts as those shown in FIGS. 1 and 2 used in the description of the first embodiment are designated by the same reference numerals, and a duplicate description will be omitted here.

The second embodiment is characterized in that the connecting member 6 has a hollow portion that can be moved back and forth, and a second moving element as a shunting means that also serves as a means for giving a sense of danger to a live fish and causing an escape behavior. The point is that means for moving the second moving element back and forth is provided.

That is, a cage 2 having a bottom and made of concrete and having an opening on the top side is laid on the seabed, and the opening projects from the water surface.

A large number of holes are formed in the wall of the cage 21 to allow seawater to flow therethrough, and one end of the connecting member 6 is connected to the wall surface on one side near the sea surface.

Further, the other end surface of the connecting member 6 is connected to the side surface of the box body 7 arranged on land at a position higher than the sea surface, and
21 and the box body 7 are communicated with each other via the connecting member 6.

The connecting member 6 is made of a synthetic resin and has a substantially square cross section. The connecting member 6 is appropriately spaced above the side wall of the hollow portion so that an appropriate number of rollers 25 are substantially perpendicular to the side wall surface and the roller surface and the inner surface of the hollow portion are separated from each other. The drive roller 24, which is mounted so as to be appropriately separated and rotatable, is mounted in the vicinity of the end face on the side of the box body 7 has its rotating shaft penetrating the side wall of the hollow portion and mounted on the outer surface of the side wall of the connecting member 6. It is connected to the output shaft 19a of the motor 19.

The output shaft 19a and the side wall have a watertight structure.

A loop-shaped rubber belt 23 is stretched around the rollers 24 and 25.

At this time, the part where the belt 23 is separated from the roller 25 and is close to the lower inner surface of the hollow portion is provided with a pair of guide plates 6a, 6 on the side wall surface of the hollow portion.
a is provided to face each other so that the upper surfaces of the guide plates 6a, 6a are substantially parallel to the axis of the roller 25 and are appropriately separated from the surface of the roller 25, and the belt 23 is provided on the upper surfaces of the guide plates 6a, 6a. Are brought into contact with each other to be slidable.

As a result, the belt 23 and the lower inner surface of the hollow portion are separated from each other by a desired amount, and the second mover 22 or live fish described later can pass therethrough. (FIG. 8) Then, the plate-shaped second moving element 22 is formed into an inverted “T” shape on the surface of the belt 23, the iron wire is formed into a grid shape, and is covered with the synthetic resin.
Is attached at a substantially right angle, and the tip of the moving element 22 is brought close to the proximity switch 17 and stopped.

The second moving element 22 is adapted to be able to advance and retreat in the space formed by the inner surface of the side wall and the lower inner surface of the connecting member 6 and the belt 23, and to be able to pass while avoiding the guide plates 6a, 6a.

However, the gap formed by the second moving element 22 or the second moving element 22 and the inner wall surface of the connecting member 6 has a shape in which live fish cannot pass.

Further, a proximity switch 17 is attached to the outside of the upper surface of the end of the connecting member 6 on the side of the cage 21, and a proximity switch 18 is also attached to the outside of the lower surface of the end of the opposing box 7 side.
These switches 17 and 18 detect the second moving element 22 through the wall surface of the connecting member 6 when the tip of the second moving element 22 comes close to it, thereby engaging the motor 19 so as to stop the rotation of the motor 19. Have been combined.

In addition, the mover 2 is sunk on the bottom of the cage 21 as in the first embodiment.

The upper surface of the mover 2 has the deepest portion on the downward extension line of the vertical center line of the communication port on the side surface 2d of the mover 2 facing the wall surface where the communication port with the connecting member 6 of the cage 21 is opened. A concave surface 2c is formed by connecting an inclined surface to the deepest part from the upper edge of the surface adjacent to the side surface 2d and the surface facing the side surface 2d. (FIG. 9) The operation of the second embodiment is the same as that of the first embodiment,
As in the first embodiment, the water in the cage 21 and the water in the box 7 are communicated with each other through the water channel formed in the hollow portion of the connecting member 6, and then the moving element 2 is floated.

At this time, it is preferable that the moving element 2 can be floated by an appropriate means until the deepest part of the concave surface 2c substantially coincides with the lower edge of the communication port.

As the mover 2 floats, the mover 2 and the sea surface are brought closer to each other to gradually reduce the living space for living fish, and when the deepest part of the concave surface 2c substantially coincides with the lower edge of the communication port, the upper edge of the mover 2 is the sea surface. The living space of the live fish projected from is only the deepest part of the concave surface 2c of the moving element 2 facing the communication port, and the live fish is substantially incapable of living.

During this time, live fish move by themselves or by being guided by the concave surface 2c to the water channel formed in the hollow portion of the connecting member 6.

Then, a switch (not shown) detects that the mover 2 has floated, the motor 19 engaged with this switch is operated, the drive roller 24 is rotated through the output shaft 19a, the belt 23 is rotated, and the belt 23 is rotated. Second moving element 22 attached to
Progresses to the box 7 side. Then, the live fish moves toward the box 7 in an attempt to escape from the second mover 22.

During this time, the mover 2 may be sunk in the same manner as in the first embodiment.

When the tip of the second mover 22 approaches the box 7, the proximity switch 18 detects this and acts to stop the motor 19 and also to act on the cylinder 10 to close the door 9 and close the box 7.
The communication port with the connecting member 6 is blocked.

Then, when the hollow portion of the connecting member 6 and the inside of the box body 7 are communicated with the atmosphere in the same manner as in the first embodiment, the seawater in the connecting member 6 is returned to the cage 21.

Thus, the function of separating the live fish from the cage 21 into the box 7 is fulfilled.

The second embodiment has an effect that the live fish in the water channel formed in the hollow portion of the connecting member 6 can be reliably separated into the box body 7 as compared with the first embodiment.

Therefore, even if only a small number of live fish are cultivated in the cage 21, this live fish can be reliably separated into the box 7.

The number of live fish moving into the box 7 may be counted by an appropriate means, and when the number reaches a predetermined number, the proximity switch 18 may be prioritized to act on the motor 19 to stop the motor 19. . This has the effect of automatically separating the required number of live fish.

Further, the door 9 may have a configuration that can be opened and closed arbitrarily.

In the second embodiment, the second moving element 22 is moved back and forth via the belt, but the invention is not limited to this. That is, instead of the belt, a chain or a flexible string may be used. in short,
Since the connecting member has a structure that can be bent arbitrarily,
Correspondingly, any traction means that can move the second moving element back and forth can be used.

Further, the shape of the second moving element is not limited to the grid-like plate-like body, and may be a sphere. In short, the water channel formed in the hollow portion of the connecting member can be moved forward and backward, and can have a shape corresponding to the cross-sectional shape of the water channel so as not to return the live fish back to the cage.

Further, in the second embodiment described above, the second moving element is advanced and retracted as the expelling means which also serves as a means for giving a sense of danger to live fish in the water channel formed in the hollow portion of the connecting member, but the present invention is not limited to this. Means to stir the water or generate sound,
Alternatively, it may be a means for generating bubbles toward the box body 7, or a combination of these means. In short, any means can be used as long as the live fish feel a sense of danger and do not approach.

In addition, the connecting member 6 of the first and second embodiments is a box body 7.
Alternatively, it may be detachably attached to the aquarium 1 or the cage 21.

Furthermore, the connecting member 6 may be a transparent body, or an illumination device may be provided in the hollow portion so that the inside of the hollow portion can be brightened.

As a result, the passage of the live fish is surely brightened, and it is possible to make a safe decision before the live fish enters the hollow portion, so that the live fish can enter without anxiety, and it is possible to reliably avoid obstacles in the hollow portion and pass through.

(Effects of the Invention) As described above, according to the method for separating live fish and the apparatus therefor according to the present invention, the live fish can be cultivated from the cage to the water pipe formed in the pipe. Live fish can be made to swim by themselves in another aquarium and separated reliably.

As a result, live fish can be separated without damaging them.

In addition, since the live fish is not damaged, it has an effect that the live fish survives for a long time even after the live fish is separated into another aquarium.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of a live fish separating apparatus according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG.
The figure is a cross-sectional view of an essential part showing another embodiment of the water tank of the first embodiment,
FIG. 4 is a sectional view showing the principal part of another embodiment of the live fish separator according to the present invention, and FIG. 5 is a sectional view showing the principal part of a still further embodiment of the live fish separator according to the present invention. Is a sectional view of a main part showing a second embodiment of the live fish separating apparatus according to the present invention, FIG. 7 is an enlarged view of BB section in FIG. 6, and FIG.
FIG. 9 is a perspective view of a mover according to the second embodiment. 1 ... water tank, 2 ... mover 3,12,14,16 ... tube 4 ... pump, 5 ... floating lid 6 ... connecting member, 6a ... guide plate 7 ... box, 8 ... Lid 9 …… Door, 10 …… Air cylinder 11 …… High pressure gas supply device 13 …… Valve, 15 …… Vacuum pump 17,18 …… Proximity switch 19 …… Motor, 21 …… Gage 22 …… 2nd movement Child, 23 …… Belt 24 …… Drive roller, 25 …… Roller

Claims (3)

[Claims] 1. A method of separating live fish cultivated in a first cage into a second cage separated from the cage, wherein the hollow portion can illuminate the first cage and the second cage. After connecting through a hollow connecting member which is said to be in communication with each other, an appropriate means generates a differential pressure between the first cage and the second cage to introduce light from the connecting member. The water of the first cage and the water of the second cage are connected to each other through a water channel formed by flowing water into the hollow portion, and the inside of the first cage or the inside of the hollow portion of the connecting member is substantially A live fish separating method, characterized in that the live fish is ejected from the first cage by operating the expelling means that can be freely moved back and forth, and the live fish is separated into the second cage by swimming through the connecting member. 2. A hollow body having an openable and closable opening, which can be sealed, a pipe extending from the hollow body and communicating with the hollow portion of the hollow body, and the hollow body or the pipe connected to the hollow body. And a decompressing means for the live fish. 3. A mover which is capable of cultivating live fish and has an opening through which the live fish can swim in and out and which can move back and forth under the surface of the cage, facing the live fish cultivated by the cage of the mover. A live fish separation device characterized in that a concave portion whose surface gradually increases in depth is formed.