JPH06339336A - Removing of fish scale - Google Patents

Abstract

PURPOSE:To remove fish scales without damaging the skin by damping the surface of fish body with water and then blowing compressed air from an air nozzle in a direction against scales, while the fish body is being moved. CONSTITUTION:While the fish body 6 is being moved by means of a bar- conveyor 1, fish body 6 is made damp with water sprayed from water spraying tube 10 and a compressed air is blown from an air nozzle 12 in a direction against scales and washed with water from a water spraying tube 11. The fish body which is being moved in the state turned over is subjected to the same manner of scale removing treatment by a water spraying tube 13 and an air nozzle 15 and washed with water from water spraying tube 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing scales on the surface of a fish body such as a snapper, a sardine, or a salmon without damaging the epidermis of the fish body.

[0002]

2. Description of the Related Art A conventional method for removing scales in a fish body is roughly described in, for example, JP-A-52-56000.
As disclosed in Japanese Patent Laid-Open Publication No. 52-98196 and Japanese Patent Laid-Open Publication No. 52-98196, for example, rubbing between the rotating brushes or the uneven rollers on the surface of the fish body.
As described in JP-A-141297 or JP-A-60-43331, there is a method of spraying high-pressure water onto the surface of a fish body.

[0003]

However, the method of rubbing the surface of the fish body between the rotating brushes or the uneven rollers as in the former method is liable to damage the epidermis of the fish body, and the commercial value of the fish body is significantly reduced. Not only that, but since the entire surface of the fish body cannot be rubbed uniformly, there are many scales left behind, and there is the problem that it cannot be applied when the fish body to be handled is small.

On the other hand, the latter method, in which high-pressure water is sprayed onto the surface of the fish body, has the advantage that less scale can be left behind than the former method and can be applied even when the fish body to be handled is small. However, on the other hand, water is added to the fish body in an amount of 20 to 60 as described in, for example, JP-A-54-141297.
It is necessary to spray a large amount of water at a high atmospheric pressure, and the amount of water used will increase significantly, and in addition, the large amount of water used here must be treated so that it can be purified. Not only will the cost be significantly increased, but the equipment will be significantly enlarged, and the equipment cost will be greatly increased.

In addition, water with a high density and mass of 20 to
Since it is sprayed on the fish body with a pressure as high as 60 atmospheres,
Since a large number of scratches such as peeling are generated on the skin of the fish body, there is a problem that the appearance of the fish body is impaired and the commercial value is significantly reduced. An object of the present invention is to provide a scale removing method that does not cause these problems.

[0006]

Means for Solving the Problems In order to achieve this technical object, the present invention provides the surface of a fish body transferred by a transfer means such as a conveyor after the surface of the fish body is wet with water, A method was adopted in which the compressed air ejected from the nozzle was blown so that the compressed air ejected in a direction against the scales on the surface of the fish body.

[0007]

[Function] When scales are removed, if the fish are in a dry state, the overlapping scales are in close contact with each other, but wetting them with water allows water to enter between the overlapping scales. Then, a water film is formed. Therefore, with respect to the surface of the fish body that has been wet with water, by blowing the compressed air ejected from the nozzle so that the compressed air is ejected in a direction against the scales on the surface of the fish body,
The compressed air ejected from the nozzle can enter between the overlapping scales through the film of water formed between them and cause each scale to act like a windy sail. All scales can be stripped off reliably.

In this case, since the density and mass of air are much smaller than the density and mass of water, the degree to which the epidermis of a fish body is damaged by spraying compressed air is significantly smaller than when spraying high pressure water. is there.

[0009]

Therefore, according to the present invention, scales on the surface of a fish body can be removed in a state where the epidermis of the fish body is less damaged, in other words, scale removal of the fish body
It can be done reliably in a state where the commercial value of the fish body is less likely to deteriorate, and moreover, after the fish body is wet with water, air is blown onto it, so that the amount of water used is
Compared with the conventional one, the amount of water to be purified is small and the operation cost can be greatly reduced, and the equipment can be inexpensive and miniaturized.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. In the figure, reference numeral 1 is four sprockets 2, 3,
4 shows a bar conveyor wound around 4,5 and moved at an appropriate speed in the direction of the arrow by a drive mechanism (not shown). The bar conveyor 1 includes a pair of left and right endless chains 1a and 1b, and both of them. It is composed of a large number of bar members 1c mounted at regular intervals between the endless chains 1a and 1b, and one endless chain 1a is provided with the head of the fish body 6 supplied between the bar members 1c. The clamp mechanism 7 that is sandwiched is provided between each of the bar members 1c.

A first belt conveyor 8 extends along the lower surface of the bar conveyor 1 between the left and right upper sprockets 2, 3 of the sprockets 2, 3, 4, 5 for guiding the bar conveyor 1. The second belt conveyor 9 extends along the lower surface of the bar conveyor 1 between the left and right lower sprockets 4, 5 of the sprockets 2, 3, 4, 5. Both belt conveyors 8 and 9 are provided.
Is driven by the drive mechanism (not shown).
It is configured to move at the same speed in the same direction as.

Above the first belt conveyor 8, two water spray tubes 10 and 11 are arranged, and
A first compressed air supply pipe 12 is arranged between the water spray pipes 10 and 11, and the first compressed air supply pipe 12 is provided.
In addition, a plurality of air nozzles (three in this embodiment) are provided so that compressed air is ejected to the fish body 6 between the bar members 1c of the bar conveyor 1 in a direction against the scales of the fish body 6. 12a, 12b, 12c are provided. In this case, the first air nozzle 12a ejects compressed air to the portion of the fish body 6 near the tail, and the next air nozzle 12b to the portion of the fish body 6 approximately in the middle between the tail and the head. To eject compressed air, and the last air nozzle 12c is configured to eject compressed air to a portion of the fish body 6 near the head.

On the other hand, two water spray pipes 13 and 14 are arranged above the second belt conveyor 9, and a second compressed air is supplied to a portion between the water spray pipes 13 and 14. A pipe 15 is provided, and compressed air is jetted to the second compressed air supply pipe 15 in a direction against scales of the fish 6 between the bar members 1c of the bar conveyor 1. A plurality of (three in this embodiment) air nozzles 15a, 15b, 15c are provided. In this case, the first air nozzle 15a ejects compressed air to the portion of the fish body 6 near the tail, and the next air nozzle 15b to the portion of the fish body 6 approximately in the middle between the tail and the head. And ejects compressed air, and the last air nozzle 15c is configured to eject compressed air to a portion of the fish body 6 near the head.

In this structure, the fish 6 is sequentially supplied between the bar members 1c of the bar conveyor 1 at the position A at the starting end of the first belt conveyor 8. The head of the fish body 6 thus supplied between the bar members 1c is clamped by the clamp mechanism 7, and is transferred in this state. In the course of this transfer, each fish body 6 is first wetted with the water sprayed from the water spray pipe 10, and then the compressed air sprayed from each air nozzle 12a, 12b, 12c is sprayed. After the scale on one surface of the surface of the fish body 6 is removed, the fish body 6 is washed with water sprayed from the water spray pipe 11.

The fish body 6 is the bar conveyor 1.
Is transferred to the upper surface of the second belt conveyor 9 while being turned over, and in the middle of this transfer, first,
By being wet with the water sprayed from the water spray pipe 13 and then spraying the compressed air sprayed from the air nozzles 15a, 15b, 15c, the scales on the opposite side of the surface of each fish body 6 are removed. After that, the chute 16 is washed with water sprayed from the water spray pipe 14, and at the position B in the vicinity of the end of the second belt conveyor 9, the clamp mechanism 7 releases the chute 16 so that the chute 16 is released. It is taken out of the aircraft via the.

After the compressed air is blown to the fish body 6, the brush roller 1 is applied to the fish body 6.
You may make 7 and 18 contact. Also,
According to an experiment conducted by the present inventor, in the case of a small bream or a sardine having a body length of about 12 to 22 cm, the jetting of compressed air is performed between the portion close to the tail and the head of the tail as illustrated in the above-mentioned embodiment. It was most preferable to set the air pressure to 12 to 18 atm in addition to the three parts, that is, the part near the head.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is an enlarged plan view taken along line II-II of FIG.

FIG. 3 is an enlarged plan view taken along line III-III of FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 Bar Conveyor 1a, 1b Endless Chain 1c Bar Member 2, 3, 4, 5 Sprocket 6 Fish Body 7 Clamping Mechanism 8 1st Belt Conveyor 9 2nd Belt Conveyor 10, 11, 13, 14 Water Sprinkling Tube 12 1st Compressed Air Supply Pipe 12a, 12b, 12c Air nozzle 15 Second compressed air supply pipe 15a, 15b, 15c Air nozzle

Claims (1)

[Claims] 1. A surface of a fish body transferred by a transfer means such as a conveyor is wetted with water, and then compressed air ejected from a nozzle is supplied to the surface of the fish body. A method for removing fish scales, characterized by spraying so as to squirt against the scales.