JPS6356778B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for aligning the cutting positions of the heads of fish bodies and cutting off the fish heads of cod whose cutting positions are aligned without damaging the fish eggs.

In the conventional fish cutting process, the tip of the fish head was aligned with a plate, etc., and then the fish head was cut, so when processing fish of various sizes without sorting the size of the fish in advance, the length of the head Because of this, the meat from the torso could be discarded along with the head, or the meat could be eaten with part of the head still attached to the torso.

Other prior art is disclosed in JP-A-57-29246 and JP-A-50-129400. The basic principle of these two prior art techniques is to apply force to the fish F from the head to the tail, or to apply force using the fish F's own weight, as shown in FIG. Received by a plate-shaped body 51 extending perpendicularly to the longitudinal direction,
As a result, the pectoral fins 50 are spread out at a large angle θ1 in the longitudinal direction of the fish body F for positioning.

Further, other prior art is JP-A No. 54-86680.
In this prior art, water is sprayed onto the pectoral fins from the tail side toward the head side to spread the pectoral fins at a large angle θ1 as shown in FIG. The cutting position is determined by the curved pectoral fins.

Therefore, in these prior art techniques, the head is cut while increasing the angle θ1 formed by the pectoral fin with the longitudinal direction of the fish body. This angle θ1 is
The angle is close to 90 degrees.

If the head is cut with the pectoral fins widened to form an angle θ1 close to 90 degrees, the following drawbacks occur.

Generally, as shown in FIG. 8, the skeleton of a fish body F is constructed such that the middle bone 52 approaches the dorsal 53 side as it goes toward the head side, and its end is connected to the head cartilage 54. . A shoulder bone 55 is connected to this head cartilage 54, and a pectoral fin 50 is formed continuously to this shoulder bone 55. Therefore, when the pectoral fin 50 is expanded to form a large angle θ1, the ninth
As shown in the figure, the shoulder bone 55 is also erected, and the head cartilage 54 is accordingly displaced toward the caudal side along the longitudinal direction of the fish body. Therefore, if the base of the pectoral fin 50 is cut at the cut line indicated by the reference numeral l1 shown in FIGS. 9 and 10 in this state, the cut line will be cut at the head compared to the cut line l2 when the pectoral fin 50 is not widened. Go to the department side. Therefore, the head cartilage 54 is attached to the body side of the cut fish body. Generally, from a fish whose head has been cut off, fillet meat is obtained by a subsequent three-piece cutting process. In such three-cut processing, the backbone 52 is mechanically removed from the fish body whose head has been cut off, and in the case of a fish body cut along the cut line indicated by reference numeral 12, Since the cartilage of the head is not attached to the body side of the fish body, the desired fillet F1 can be obtained as shown in FIG. 11. However, when three fish bodies cut along the cut line indicated by reference numeral 11 are lowered, only the middle bones can be removed, resulting in fillet meat F1 with cartilage 54 attached, as shown by diagonal lines in Fig. 12. It ends up. Therefore, the work of extracting the cartilage 54 must be performed anew, which is time consuming and reduces work efficiency.

The purpose of the present invention is to solve the above-mentioned technical problems,
Regardless of the size of the fish, the fish can be aligned based on the base of the pectoral fin, and
To provide a fish head cutting device which does not damage the roe of cod species, which can cut off the head without attaching cartilage or the like to the trunk side of the cut fish body and without damaging the roe of the fish body. That's true.

The present invention provides a fish transport means for transporting fish in a direction intersecting the transport direction and in a recumbent position, and a linear wire body or a thin plate-shaped body with straight edges that is inserted into the pectoral fin of the fish. and, the distance between the fish transported by the fish transporting means and the wire body or plate-like body is brought relatively close, and the wire body or plate-like body is placed on the pectoral fin of the fish body, and the pectoral fins are widened. and a cutting means that cuts off the head at a position near the base of the pectoral fin in a state where the pectoral fin is not widened. This is a fish head cutting device that does not stick.

Hereinafter, the present invention will be explained in detail with reference to some examples.

FIG. 1 shows a plan view of an embodiment of the present invention.

A conveyor 1 has a conveyor 2 for conveying fish bodies.
...2 are continuously arranged in parallel in the transverse direction with respect to the conveyor traveling direction R. The structure of this carrier 2 has a width that allows a fish to be placed sideways, and is in the form of a rectangular groove as a whole, as shown in the cross-sectional view in Fig. 2.
It is divided into a first part 3 on which the head is placed and a second part 4 on which the torso is placed, with a gap 5 of about 10 mm or more between them.
Both parts 3 and 4 are integrally joined by a joining part 6 while maintaining the same. A notch 7 is formed in the center of the side of the bottom of the second part 4 facing the first part, and a piano wire 8 is stretched over the notch 7 so that the pectoral fin 50 is hung thereon. There is. A rotating brush 9 is provided at a predetermined position on the conveyor 1 for sliding the fish toward the tail. A rotating knife 10 for cutting the fish head is provided downstream of the rotating brush 9. At this time, in order to prevent the fish from escaping, a belt 11 may be provided to press down on the fish head from above, if necessary, and may be run at the same speed as the conveyor 1.

In this device, conveyor 1 conveyor 2...2
The fish body placed on top is displaced toward the fish tail by the rotating brush 9, but at this time, the pectoral fin hooks onto the piano wire 8 and is no longer displaced. The positional relationship between the base of the pectoral fin and the gill lid of a fish is almost constant regardless of the size of the fish, so if you cut the head with the base of the pectoral fin aligned, it will be easier to cut the head with the tip of the fish aligned. It is possible to perform processing with much higher precision compared to other methods.

FIG. 3 shows another embodiment of the invention. A conveyor 2A is arranged side by side on the conveyor 1, but this conveyor 2A is not provided with the piano wire as shown in the above-mentioned embodiment, but has a notch 7 for opening the pectoral fin. only is formed. One piano wire 12 inclined at an angle θ with respect to the conveyor traveling direction R
is stretched close to the lower side of the transport tools 2A...2A. A rotary knife 10 for cutting fish heads is provided downstream of the terminal end of the piano wire 12. In such a configuration, when fish are placed on the conveyor 1 and run, the points at which the pectoral fins touch the piano wire vary depending on the placement position and size of the fish, but the bases of the pectoral fins are aligned at the end of the piano wire. , the fish head is cut off while it is still intact.

FIG. 4 shows a front view of still another embodiment of the present invention.

The wheel 21 is made up of two parallel disks rotating around a horizontal axis 22, and fish head receivers 23...23 are arranged at equal intervals along the outer periphery. The fish head receiving part 23 is in the shape of a bag that opens outward in the radial direction of the wheel. is equipped with a cam (not shown), which has a cam shape such that the skewer penetrates the fish head when the fish head receiving part 23 is rotated approximately 60 degrees from directly above, and the skewer comes out at a position directly below. It is formed. Slightly below the lower end of the wheel 21, two parallel piano wires 25 are stretched almost horizontally, and further below that, a pair of belts 26 run in the direction of the arrow. Convey the product in the direction of the arrow by holding the body of the product. A rotary knife 27 for cutting the fish head is provided between a position slightly below the wheel 21 and the piano wire 25.

In such a configuration, the wheel 21 continuously rotates at a predetermined rotational speed, and the belt 26 runs at a speed equal to or slightly faster than the circumferential speed of the wheel. When the fish body receiving part 23 of the wheel 21 is in the upper position, the fish body is placed in the fish body receiving part 23 with its head at the top.
inserted into. A skewer is then penetrated to secure the fish head to the wheel. When the fish comes just below the wheel, the skewer comes off and the fish falls, and the left and right pelvic fins get caught on the piano wire, leaving it hanging as shown in Figure 5. In this hanging state, the head is cut and removed by a rotating knife, and only the body is conveyed to the next process by a belt.

As a modification of this embodiment, a pair of loop-shaped piano wires may be driven to travel, and the fish body may be transported while suspended by its pectoral fins. Also,
Instead of the belt 26 that pinches the trunk, the tail may be pinched and conveyed by a chain. Further, as a modified example of each of the above embodiments, the same effects can be achieved by using a thin plate material instead of the piano wire.

Insertion means of the present invention include the above-mentioned means using a rotating brush, means using a piano wire or the like at an angle, means for letting the fish fall by gravity, and the method by tilting a conveyor for conveying the fish so as to cause the fish to slide down. It can be implemented even if That is, as shown in FIG. 6, a hinge 32 is provided on the side plate of the chain 31 so that the fish body conveyor 33 can be tilted freely, and when the fish body conveyor 33 is tilted by the pressure of the cam, the fish body moves toward the tail. Falling down piano wire 3
It can also be configured to hook on 4.

Furthermore, before or at the same time as inserting the piano wire, fluid such as water or air may be ejected from a nozzle to open the pectoral fins.

Fig. 13 is a front view showing the skeleton of a fish F such as cod, Fig. 14 is a plan view of Fig. 13, and Fig. 15 is a front view of the fish F with the pectoral fin 50 removed. be. The principle of the present invention will be explained in detail with reference to each figure. As mentioned in the prior art section, the prior art of the present invention is JP-A No. 57-29246 (hereinafter referred to as Prior Art Example 1) and JP-A No. 54-86680.
(hereinafter referred to as conventional example 2). These conventional examples 1 and 2 use the brake shoe 11 and the guide track 13 (conventional example 1) to widely expand the pectoral fins to an angle perpendicular to the longitudinal direction of the fish body F and maintain the expanded state. A guide body 4 (conventional example 2) is used. Conventional Examples 1 and 2 seem to be similar to the present invention in that they use a plate-like member or a member similar thereto, but they are completely different as will be described later.

That is, in Conventional Example 1, the brake shoes 11 are used to hold the pectoral fins in a widely expanded state. This is because the brake shoe 11 extends vertically in the longitudinal direction of the fish body as shown in Fig. 3 of Conventional Example 1.
This is clear from the use of .

As shown in Fig. 4, Conventional Example 2 uses a jet of water or compressed air 3 to forcibly expand the pectoral fins in the longitudinal direction of the fish body to nearly vertical. The pectoral fin is fixed using the edge of the fin raising groove 7 or the like.

That is, in conventional examples 1 and 2, the brake shoe 1
1, the jet 3, the fin raising groove 7, etc. are configured to expand the pectoral fins in the longitudinal direction of the fish body to nearly vertical.

On the other hand, the present invention aims to prevent the pectoral fins from expanding as much as possible. Therefore, the member to be inserted into the pectoral fin must be selected to be as short and thin as possible in the thickness direction of the fish body F (vertical direction in FIG. 2), such as a piano wire. (The reason will be explained later.) In this respect, the brake shoe 11 of Conventional Example 1 cannot be called a "wire body" or a "thin plate-like body" as defined in the present invention, and has no structure, function, or purpose. It's a completely different thing.

Conventional Example 2 uses the base plate 6, but the jet 3 is what expands the pectoral fin, and the fin raising groove 7 only contacts the expanded pectoral fin and holds it in the expanded state. . Therefore, it cannot be said to be a member that has the function of being "inserted into the pectoral fin of a fish" as defined in the present invention.

In the following, in the present invention, the necessity for the member inserted into the pectoral fin to be as thin as possible as described above will be explained.

The target fish of the present invention is limited to cod, especially pollock cod, fresh fish that has been caught for about 1 to 3 days after death. When a fish dies, its pectoral fins are tightly attached to its body. If a fish with rigor mortis tries to spread its fins 90 degrees, a considerable amount of force is required at the armpits. In other words, even fresh fish with rigor mortis are difficult to spread.

If the fish is thawed, the muscle tissue will become even more rigid, and the fins will often break and tear. In addition, the fish body for about 1 to 3 days immediately after rigor mortis becomes soft as time passes after rigor mortis, so that when you pinch the ends of the head and tail and bend them, they form a circle. Both the epidermis and bones are extremely soft, like a mollusk.

The problem is that the pectoral fins of fresh fish after rigor mortis are in contact with the body side and can be easily expanded, but the surrounding muscle tissue and other parts surrounding the pectoral fins tend to become limp. Because of this, the pectoral fins are not in the right position when expanded and raised, and the weight of the fins, which are less than 1/1000 of the body weight, cannot support the fish body, making it impossible to fix it in a desired position.

In other words, the position of the body cannot be determined depending on the position of the fins. Furthermore, if this device is installed on a construction vessel, the fish will be able to move freely back and forth due to the rolling and pitching of the vessel.

When you raise the pectoral fins of pollock cod and cut the head, the disadvantage is that the head cut line is ±10 m/cm as mentioned above.
An m-position error will occur.

For this reason, the yield is unstable and the fillet shape is not uniform.

Some fillets have a kama bone attached to the tip.

Due to the raw material situation, the logic may not work, and the fins may break off and lose their positioning function.

A major problem is that the eggs often cannot be expelled. Even if the egg can be expelled, the egg will rupture.

In other words, when cutting a fish head based on the pectoral fin, the muscle tissue of the fish body softens over time.
Naturally, the pectoral fins themselves also soften. Therefore, even if the pectoral fin itself is held, the position where the fish head is cut cannot actually be determined.

Furthermore, when the pectoral fin 50 is erected approximately 90 degrees as indicated by the arrow A1 in FIG.
The area near the other end of the fin bone 50 is buried in the inner meat 62 as the pectoral fin 50 rises, and the hip bone 55 is pressed outward near the opposite end of the fin bone 61, causing the hip bone 55 to form two points. Stand up as shown by the chain line. As a result, the inner meat 62 moves toward the caudal side, and accordingly, the head cartilage 54 also moves toward the caudal side. Therefore, it goes without saying that this movement of the head cartilage 54 toward the caudal side is, so to speak, compression.

When the pectoral fin 50 is erected in this way, the head cartilage 54 moves toward the caudal side, thereby causing the cutting position l of the present invention in a state where the pectoral fin 50 is not erected.
Even if the cutting is performed in step 2, the head cartilage 54 may remain on the side of the cut fillet meat.

Further, as shown in FIG. 14, when the pectoral fin 50 is close to the body side of the fish, the connection position between the pectoral fin 50 and the fish skin 63 is indicated by an arrow A2, and this position is the cutting point of the present invention. The position is 12. At this cutting position, the head cartilage 54 will not remain on the fillet side unless the pectoral fin 50 is erected as described above, and fillet meat of good quality can be obtained.

On the other hand, when the pectoral fin 50 is erected, the head cartilage 54 moves toward the caudal side as described above. In addition, when the pectoral fin 50 separates from the fish skin 63 and finally completes standing up, the pectoral fin 50 is connected to the fish body F at the connection position A3. This connection position A
The head cartilage 54 remains on the fillet meat side by a difference B1 between 2 and A3 in the longitudinal direction of the fish body. This difference B1 is the widthwise length C1 and C in FIG. 14 in plan view.
It makes a difference of 2.

In addition to cartilage forming at the end of the three fillets, it is also important to remove the eggs from the female without damaging them. The cartilage remains and gets scratched when the egg is squeezed out.

Further, if the cartilage 54 is attached, the cut opening is narrow and the exit of the egg 64 is narrow, making it difficult for the egg 64 to come out. In order to release the eggs, the head cut position must be extremely accurate.

For this purpose, when the fins 50 are aligned in close contact with the body, the position of the cut becomes the best position for collecting the eggs 64.

According to the present invention, since the head of the fish is cut after aligning the bases of the pectoral fins, only unnecessary parts can be accurately removed regardless of the size of the head.

Further, according to the present invention, the linear wire body or thin plate-like body is inserted into the pectoral fin of the fish body for positioning without the pectoral fin being greatly expanded. As explained above, when the head is cut off, the cartilage of the head on the body side does not attach, which prevents cartilage from remaining in the fillet meat obtained through subsequent processing such as cutting off three pieces. I can escape.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a sectional view of the carrier 2 of FIG. 1. FIG. 3 is a plan view showing another embodiment of the present invention. FIG. 4 is a front view showing still another embodiment of the present invention, and FIG.
The figure is an explanatory diagram of its operation. FIG. 6 is a side view showing another embodiment of the insertion means of the present invention, FIG. 7 is a diagram showing the basic principle of another prior art, FIG. 8 is a diagram showing the skeleton of a fish body F, and FIGS. Figure 10 is a diagram showing the state in which the pectoral fin is cut with and without it being widely spread, Figure 11 is a front view of the desired fillet, and Figure 12 is cut using the prior art positioning method. Fig. 13 is a front view showing the skeleton of a fish F such as cod, Fig. 14 is a plan view of Fig. 13, and Fig. 16 is a plan view of FIG. 15, FIG. 17 is a diagram of a decapitated fish according to conventional examples 1 and 2, and FIG. 18 is a front view of a fish F with its pectoral fin removed. 1 is a diagram of a decapitated fish body according to the present invention; FIG. DESCRIPTION OF SYMBOLS 1... Conveyor, 2, 2A... Conveyor, 8... Piano wire, 9... Rotating brush, 10... Rotating knife, 12...
Piano wire, 21...wheel, 23...fish head receiver,
25... Piano wire, 26... Belt, 27... Rotating knife.

Claims (1)

[Scope of Claims] 1. A fish body transport means for transporting a fish body in a direction crossing the transport direction and in a recumbent position; and a linear wire body or a straight thin plate-shaped body inserted into the pectoral fin of the fish body. The distance between the fish body and the fish body transported by the fish body transporting means is relatively shortened to the wire body or plate-like body, and the wire body or plate-like body is placed on the pectoral fin of the fish body, and the pectoral fin is enlarged. A method for wounding cod fish roe characterized by comprising a means for inserting the fish without expanding it, and a cutting means for cutting off the head at a position near the base of the pectoral fin in a state where the pectoral fin is not greatly expanded. A fish head cutting device that does not stick.