JPH0240772Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an incubation tank, and more particularly, to an incubation tank equipped with an upper mesh shelf for placing eggs to be hatched in a box body.

(Prior Art) Conventionally, this type of hatching tank is constructed as shown in FIGS. 2 to 4. A top lid 2 is placed on the top surface of the box body 1, and a water supply port 3 is formed at the right end of the top lid 2 in FIG. A partition plate 5 is fixedly installed in contact with the water supply port 3, and the water supplied from the water supply port 3 flows down the right side of the partition plate 5 in FIG. Partition plate 5
It is designed to flow into the space A side through between the lower end of and the lower end of the space A. Reference numeral 7 denotes an overflow weir, and water overflowing the overflow weir 7 is discharged from the drain port 6.

In the space A, an upper net 12 for placing eggs 8 for hatching and a lower net 13 for placing fishing reefs 17 are arranged in two stages, upper and lower. The upper screen 12 has a lower frame 10 for attaching the upper screen and an upper frame 11 for attaching the upper screen.
(FIG. 3), and the lower part 10 of the upper screen attachment frame and the upper part 11 of the upper screen attachment frame are fixed by screws or adhesive (not shown). The lower part of the upper screen mounting frame 10 holding the upper screen 12 is supported on the upper surface of the support piece 9, and a plurality of support pieces 9, for example, about 6 pieces, are fixed at predetermined locations on the side wall 20 of the box body 1 or on the partition plate 5. has been done.

The lower screen 13 is attached to a lower screen attachment frame 15 (Fig. 4), and the lower screen attachment frame 15 has an L-shaped cross section, and the lower screen 1 is attached to the upper surface of the bottom part.
3 is arranged, and a presser piece 16 presses this peripheral edge from above, and the lower screen attachment frame 15
The holding piece 16 is fixed with adhesive or screws (not shown). The lower surface of the lower screen attachment frame 15 is supported by support pieces 14, and like the above-mentioned support pieces 9, a plurality of support pieces 14, for example, 6 pieces, are attached to the side wall 20 of the box body 1 or at a predetermined location on the partition plate 5. It is fixed to a certain extent. A gap 18 is formed between the lower screen attachment frame 15 and the side wall 20 or the partition plate 5 so that the lower screen attachment frame 15 can be easily removed from the box body 1 side. A rubber gasket 19 is provided at the top of the gap 18 to prevent hatched fry from sticking their heads into the gap 18 and dying. Several layers of fishing reefs 17 are placed on the upper surface of the lower net 13 for the hatched fry.
The fry hatched from the eggs 8 (FIG. 2) placed on top fall from the upper net 12 to the lower net 13 side, where the fry grow.

The applicant has also developed a hatching tank as disclosed in Utility Application No. 1983-70453 (filing date: May 9, 1988).

(Problems with conventional technology) However, hatched fry have a habit of entering dark places, and in the case of Fig. 2, the gap 18
They often die by sticking their head in. To prevent this, a rubber gasket 19 is provided at the top of the gap 18, but when water is supplied to the box body 1, the side walls 20 or the partition plate 5 are pushed outward by the water pressure (see the arrows). b), rubber gasket 19
However, there was a problem in which young fish could get into the gap 18 and die.

(Means for Solving the Problems) The present invention provides a hatching tank equipped with a net shelf for placing eggs to be hatched in a box-shaped body, and a mounting frame that surrounds the periphery of the hatching net constituting the net shelf. A holding part for holding the mounting frame is formed on the inner peripheral surface of the box-shaped main body, and the holding part for holding the mounting frame has a tapered surface that opens upward, and the outer peripheral surface of the mounting frame is prevented from hatching fry from entering into the tapered surface of the holding part. This hatching tank is characterized by having tapered surfaces that fit together in a manner similar to the above.

(Function) Since the outer circumferential surface of the mounting frame fits tightly into the tapered surface of the holding part, no gap is created for young fish to enter.

(Example) In FIG. 1 showing a hatching tank employing the present invention, parts given the same reference numerals as in FIGS. 2 to 4 indicate the same or equivalent parts.

In FIG. 1, a box-shaped main body 1 is formed of an outer frame 30 on the outside and an inner frame 32 on the inside.
2 are both made of thin aluminum plates. Between the outer frame 30 and the inner frame 32 is a chamber 34 which will be described in detail later.
are separated. Therefore, the inner peripheral surface of the inner frame 32 becomes the inner surface of the box-shaped main body 1.

A holding part 36 is formed in the vertically intermediate portion of the inner frame 32, and the upper screen 12 (upper screen shelf) is detachably held in this holding part 36. Further, a 38 is formed at the lower end of the inner frame 32, and a lower screen 13 (made of stainless steel screen) is sandwiched between the flange 38 and the frame body 40. This frame body 40 is placed on the upper surface of a bracket 42 fixed to the inner peripheral surface of the outer frame 30 by, for example, welding.

In FIG. 1A, which is an enlarged view of part A in FIG.
The second holding structure will be explained. The upper net 12 is composed of a resin net 44 (hatching net), an upper frame 46, a lower frame 48, etc., and the peripheral edge of the resin net 44 is sandwiched between the upper frame 46 and the lower frame 48 to form the resin net. 44 has tension. Upper frame 4
6. The lower frame body 48 is fastened with rivets 50.

A tapered surface 52 and a flat surface 54 are formed in the holding portion 36 of the inner frame 32 that holds the upper screen 12 in a detachable manner. The tapered surface 46a of the upper frame 46 is in close contact with the tapered surface 52, and the lower surface 56 of the lower frame 48 is in close contact with the flat surface 54. Therefore, there is no gap at all between the inner frame 32 and the upper frame 46, which prevents the hatched fry from sticking their heads into the gap and dying as in the conventional case. It's summery.

Further, a hole 58 is bored in the bracket 42, and fresh water is supplied into the chamber 34 through the hole 58, so that the water in the chamber 34 does not spoil.

In FIG. 1, 60 is a handle for attaching and detaching the upper screen 12, and the entire upper screen 12 is placed on the holding part 36 in a detachable manner. Further, since the inner frame 32 and the lower screen 13 are also placed on the bracket 42, the structure is such that the inner frame 32 and the lower screen 13 can be attached and removed from the box-shaped main body 1 when cleaning the lower screen 13. .

Next, the effect will be explained. In the embodiment shown in FIG. 1, eggs are placed on the resin net 44 of the upper net 12 at a predetermined height (for example, about 10 cm), and fresh water is flowed upward from the bottom of the upper net 12 to hatch the eggs, and the hatched fry are dropped down from the resin net 44 and grown on the fishing reef 17 above the lower net 13.

As shown in FIG. 1A, since the tapered surface 46a of the upper net 12 is in close contact with the tapered surface 52 of the holding part 36 over the entire circumference, the upper net 12 and the holding part 36 are in close contact with each other over the entire circumference.
There is no gap between them that allows the hatched fry to get in, and it is possible to reliably prevent the fry from sticking their head into the gap and dying.

In addition, a hole 58 is formed in the bracket 42, and fresh water is circulated through the hole 58 into the chamber 34 to prevent the water in the chamber 34 from spoiling, thereby increasing the hatching rate of the eggs themselves. The growth rate of hatched fry also improves.

If the resin net 44 of the upper screen 12 or the lower screen 13 become dirty, the entire upper screen 12 can be attached and detached from the holding part 36, and similarly the lower screen 13 can be attached and detached from the outer frame 30 together with the inner frame 32. Easy to clean.

(Effect of the invention) As explained above, the hatching tank according to the invention has a hatching net (resin net 4) constituting the net shelf (upper net 12).
4) A holding part for holding the mounting frame, which is provided with a mounting frame (upper frame 46, lower frame 48) surrounding the peripheral edge of the box-shaped main body 1 and has a tapered surface 52 that opens upward on the inner peripheral surface of the box-shaped main body 1. 36, and the tapered surface 4 fits the outer circumferential surface of the upper frame 46 into the tapered surface 52 of the holding portion 36 to prevent hatched fry from entering.
6a, as shown in FIG. 1A, the tapered surface 46a of the upper mesh 12 can be brought into close contact with the entire circumference of the tapered surface 52 of the holding part 36, and the upper mesh 12 and the holding part 36 can be tightly attached. There is no gap in between that allows the hatched fry to get in, and it is possible to reliably prevent the fry from sticking their head into the gap and dying.

(Another Embodiment) (1) The present invention is not limited to the case shown in FIG. 1. For example, as shown in FIG. is removably placed on the tapered surface 52 of the inner frame 64.
The tapered surface 46a of the upper screen 12 may be placed on the upper screen 12. Further, the inner frame 64 may be filled with styrofoam 68 to prevent rotten water from remaining in the space within the inner frame 64.

The shapes of the bracket 62 and the inner frame 64 are not limited to those shown in FIG. 5, but can be modified as shown in FIGS. 5A to 5D.

(2) In the case of Fig. 1, the box-shaped main body 1 is formed by an outer frame 30 and an inner frame 32, and the inner circumferential surface of the inner frame 32 is the inner circumferential surface of the box-shaped main body 1, but the inner frame 32 is If not provided, the holding portion 36 may be formed directly on the inner surface of the outer frame 30.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing a hatching tank employing the present invention, Fig. 1A is an enlarged view of section A in Fig. 1, Fig. 2 is a longitudinal sectional view showing a conventional example, and Figs. 3 and 4 are FIG. 5 is an enlarged view showing the main part of FIG. 2, FIG. 5 is a vertical sectional view of the main part showing another embodiment, FIG. 5A, FIG. 5B, and FIG.
FIG. C and FIG. 5D are schematic vertical cross-sectional views showing still another embodiment. 1... Box-shaped main body, 3... Water supply port, 5...
...Partition plate, 6...Drain port, 12...Top screen, 13
...Lower screen, 30...Outer frame, 32...Inner frame, 44...
...resin net, 46...upper frame body, 48...lower frame body, 52, 46a...tapered surface.

Claims (1)

[Scope of utility model registration request] In a hatching tank equipped with a net shelf for placing eggs to be hatched in a box-shaped body, a mounting frame is provided that surrounds the periphery of the hatching net constituting the net shelf, and opens upward on the inner peripheral surface of the box-shaped body. A holding part for holding the mounting frame is formed having a tapered surface, and the outer circumferential surface of the mounting frame is formed into a tapered surface that fits to prevent hatched fry from entering the tapered surface of the holding part. Incubation tank.