JPH0438555B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for cutting fish bodies into three pieces, such as flounder, flounder, etc.

Conventional technology The conventional device for cutting fish into three pieces is
The fish body is placed with its back upwards on a horizontally arranged conveyor belt, and while being conveyed, the abdomen is incised and placed on the rail, where it is cut by a pair of rotating blades on both sides with the backbone in between. , he cut it down into three pieces at once. However, with this type of device, because the distance between the two coaxially parallel rotating blades is large, or in other words, the width is matched to the width of the midbone, both sides of the midbone of the cut fish body are cut. Much of the fish meat remained on the branch bones and other parts that were discarded, making it very uneconomical.

In order to solve the above-mentioned problem, the inventor of the present invention further invented a device for grating three pieces of fish, which is disclosed in Japanese Patent Application Laid-Open No. 56-96655. This three-piece fish cutting device includes two pairs of first rotary blades that cut the fish body sandwiched by a conveyor belt that transports the fish body to the vicinity of the back bone, and two pairs of first rotary blades that cut the fish body that is held by the conveyor belt that conveys the fish body, and The fish body was cut into three pieces by two pairs of second rotary blades that cut the uncut portion near the backbone.

The above-mentioned prior art required a total of eight rotary blades, and these rotary blades had to be driven at a constant rotation speed, and the drive motor for that purpose also required a high-output one. Further, the cut of the fish body cut by the first rotary blade must be opened so that the second rotary blade can be inserted into a predetermined position, and for this purpose, a fillet guide device is provided. Such a device for cutting three fish bodies not only has a large number of parts but also requires a large amount of electric power, making it very uneconomical. Furthermore, even if the position of the second rotary blade is changed so that the cut surface of the fish body cut by the first rotary blade matches the cut surface of the second rotary blade, the second rotary blade When cutting with the blade, the fish body is unstable because it is not held by a conveyor belt, etc., and the second blade is rotated with a large torque.
There is a risk that the fish body may be displaced when it is cut by the rotating blade, and there may also be slight deviations in the cut end depending on the size of the fish body or the quality of the flesh, and the cut end may be cut by two blades. There was a problem in that the shape was formed, the shape of the fillet was poor, and the quality deteriorated.

Other prior art, for example, JP-A-55-
Shown in 23945. This prior art discloses that a cutting blade that vibrates horizontally cuts the squid, which moves forward while being held between a pair of upper and lower rollers, into thin pieces. However, also in this prior art, at the cutting position by the cutting blade, the portion that is sent out and protruding from between the rollers is not restrained in its displacement, so the cutting position easily shifts, resulting in poor processing quality. There is a problem in that the value decreases. Further, this prior art requires a configuration for horizontally vibrating the cutting blade, which causes the problem that the entire device becomes large and complicated.

Problems to be Solved by the Invention It is an object of the present invention to have a simple structure, to minimize the amount of fish meat remaining on the back bone, and to prevent the formation of an undesirable blade shape in the cut fillet. To provide a device for grating three pieces of fish body without causing any damage.

Means for Solving the Problems The present invention comprises a pair of conveyor belts that grip the midbone of a headless fish body from both sides in the thickness direction of the fish body and convey it in the cranio-caudal direction, and conveyed by the conveyor belts. Each pair is formed on both sides in the dorsal and ventral direction with respect to the transportation route of the headless fish body to be transported,
circular rotary blades that are provided so as to expand away from each other toward both sides in the dorsoventral direction from the conveyance path, and cut the headless fish body from the dorsal fin side and the ventral side to the vicinity of the midbone; The blades are fixed at fixed positions near the downstream side in the conveyance direction of the rotary blade and are spaced apart from each other, and the headless fish bodies that are conveyed while being held by the conveyor belt are cut by the rotary blade. This device is characterized by including a pair of plate-shaped fixed blades for cutting the uncut portion along the back bone.

Effects According to the present invention, a headless fish body transported by a conveyor belt is cut from the dorsoventral direction to the vicinity of the midbone by two pairs of rotating blades, and the vicinity of the midbone is held between the blade edges, It is pushed downward by the rotational force.
Furthermore, the uncut portion of the extruded fish body that was not cut by the rotary blade is cut by a pair of fixed blades. This reduces the amount of fish meat remaining on the back bone as much as possible, and prevents the formation of an undesirable blade shape on the cut surface. Moreover, compared to conventional devices, only two pairs of rotary blades are required, reducing the number of parts and resulting in a simpler structure.

Embodiment FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the section line - in FIG. 1. Fish body three-piece grating device 1 of the present invention
A fish loading belt 3 and a fish holding belt 4 are provided above the frame 2, and a pair of conveyor belts 5A and 5B are connected to the lower end of the belt and transport the fish from top to bottom. . Both of the conveyor belts 5A and 5B are formed to have a narrow width, for example, about 10 mm in the case of the conveyor belt for fishing. The conveyor belts 5A and 5B are connected to the conveyor belts 5A and 5B, and the pulleys 6A and 6B are driven in series by forming contact points with the input belt 3 and the presser belt 4, and the conveyor belts 5A or 5B are hung at the center of each of the pulleys 6A and 6B in the horizontal axis direction. A pair of left and right loading belts 3 or a pair of left and right presser belts 4 are hung on both sides thereof. Pulley 6A, 6
A fish body center position correcting device 7 is provided below B and above the forward path of the conveyor belts 5A, 5B. This center position correction device 7
A and 5B are arranged on both sides of the conveyance direction, and a plurality of plate-shaped fish body position correction plates are arranged in parallel on both sides with respect to the dorsoventral surface direction of the conveyed fish body, and a pair is arranged on each side. For each position correction plate segment to be made, that is, the pair of innermost segments 7a adjacent to it with the conveyor belts 5A and 5B in between, the pair of adjacent segments 7b second from the inside, and the pair of outermost segments 7c are pressed. Each is individually operated by a device (not shown).
When the width dimension of the conveyed object is very small, only the innermost pair of right and left segments, a total of four segments, are opened against the elastic reaction force of the pressing device, and the other segments are closed. As the width dimension of the conveyed object increases, the outer segments 7
b, and then segment 7c, a total of four segments forming a pair of left and right sides are configured to open at the same time. Also, each segment 7a, 7b, 7
The lower end of c is formed in an arc shape facing the circumference of a circular rotary blade 8, which will be described later.

The rotary blade 8 includes four circular blades 8A and 8B arranged on both sides of the conveyor belts 5A and 5B, respectively.
and 8C, 8D, and each circular blade 8A, 8B and 8C, 8D has a shaft 9A, 9B and 9C, 9 supported on both sides of the frame 2.
D rotates in the directions of arrows E and F in FIG. 2, respectively.

FIG. 3 is a sectional view taken along the section line - in FIG. 1. Portions corresponding to those in FIGS. 1 and 2 are given the same reference numerals. Circular blades 8A and 8 facing each other
The inner surfaces of B, 8C, and 8D widen in directions that move away from each other toward both sides of the dorsoventral direction (horizontal direction in FIG. 3) with respect to the transportation path of the fish body (perpendicular to the plane of the paper in FIG. 3). and a slight angle a1,a
2 (for example, several degrees or less), and the interval d1 at the cutting portion between the circular blades 8A, 8B and 8C, 8D is, for example, about 2 to 3 mm,
This dimension is determined by the width of the midbone of the fish body.
Further, a pair of circular blades 8A, 8C and 8B are provided in the plane direction on both the left and right sides of the conveyor belt 5A or 5B.
The distance d2 from 8D is approximately several mm, and this dimension is determined by the thickness of the base of the ramus bone where the middle bone of the fish body grows. Immediately below the rotary blade 8, a fixed blade 11 is fixed by an arm 10 extending from the frame 2 and serving as a fixed position. This fixed blade 1
1 consists of two flat blades 11A and 11B, which are fixed and arranged in parallel with each other, and the distance between the opposing surfaces is set in the same way as the distance d2 of the rotary blade 8 described above, for example, 2~ It is about 3mm. Further, below the fixed blade 11, a pair of left and right fillet carrying belts 12A, 12B are provided, and directly below the carrying belts 12A, 12B are the fallen backbones 24,
A container 13 for receiving the ramus 23, the pelvic fin 22, etc. is provided.

Next, the operation of the device 1 for cutting three pieces of fish will be explained with reference to FIGS. 1 and 2. When the fish body 20 whose head has been cut and removed in advance is placed on the fish loading belt 3 with the tail section first, it is transported and dropped into the center position correction device 7, and the center of the back bone of the fish body 20 is transported. The conveyor belts 5A and 5B are moved while adjusting their positions in the left and right direction so that they align with the centers of the belts 5A and 5B.
It is held between 5B. As shown in FIG.
Cut along both sides of the ramus 23 to the center, and as the cutting progresses, the cut fillet parts 26, 27 are cut by circular blades 8A, 8B, 8C, 8D.
is guided along each outer surface of the bone 24, and reaches the surface of the back bone 24 while opening a cutting opening. Next, the fish body 20 cut by the rotary blade 8 is transported by the conveyor belts 5A, 5B without closing the cut end, and is also transported by the rotational force of the rotary blade 8 to each circular blade 8A. The fixed blade 11 is inserted with the blade edge portions 8D to 8D holding the vicinity of the back bone and pushing the fish body 20 downward. At this time, the flat blade 1 constituting the fixed blade 11
Since the distance between 1A and 11B is the same as the distance d2 between circular blades 8A and 8B or 8C and 8D constituting the rotary blade 8, the flat blades 11A and 11B are placed in the same part of the cut.
The cutting edge of 11B is inserted, and the bone portion 25 and the fillet portions 26, 27 are separated from each other by a uniform cutting surface along the back bone without forming two stages of blade shapes on the cutting surface. In this way, the uncut portion remaining near the midbone 24 is cut, and the bone portion 25 including the midbone, ramus, dorsal fin, ventral fin, and caudal fin, and the left and right fillet portions 26 and 27 are separated. Completely separate the fillet parts 26 and 27 from the left and right delivery belts 1, respectively.
2A, 12B, and the bone portion 25 is removed from the container 1.
Fall within 3. In this way, the fillet portions 26, 27 and the bone portion 25 are separated and taken out without leaving the fish meat on the back bone.

Effects As described above, according to the present invention, in order to completely separate the uncut portion of a fish body that has been cut by the rotary blade to the vicinity of the midbone by the fixed blade, it is possible to completely separate the uncut portion of the fish body by the rotating blade to the vicinity of the midbone. The fillet portion can be significantly reduced compared to the conventional method. Moreover, since no undesirable blade shape is formed on the cut surface of the separated fillet, it is possible to provide a fillet with a good appearance and high quality. Furthermore, compared to conventional devices, the device of the present invention does not need to provide a guide plate, and the number of rotary blades can be reduced from eight to four, so the number of parts can be reduced and the structure can be simplified.

Further, according to the present invention, the rotary blades forming each pair are provided so as to widen apart from each other as they move toward both sides of the dorsoventral direction from the conveyance path, so that the cut portion is placed on the outside of each cutting blade. There is no risk that the gap between the mutually opposing rotary blades will be clogged with residues such as ramus bones after cutting, and the blades can be easily dropped to perform a smooth cutting operation. In other words, if the residue is clogged between the rotating blades that face each other, it will prevent the ramus from fitting between them, and the ramus that will fit between the rotating blades will come into contact with the residue and cause the fish body to fall. However, by keeping the mutually opposing rotary blades spread out as in the present invention, there is no risk that the aforementioned residue will become stuck between the rotary blades. Therefore, there is no risk that the fish body will be displaced during cutting. Moreover, since the fixed blade does not need to be vibrated horizontally like the cutting blade of the prior art, there is no need to provide a structure for this purpose, so the structure is simple and the overall structure of the device does not become large. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken from the cutting plane line - in FIG. 1, and FIG. 3 is a sectional view taken from the cutting plane line - in FIG. 1. be. 1... Three-piece grated device, 2... Frame, 3...
...Fish body loading belt, 4...Fish body holding belt, 5
...Conveyor belt, 6...Pulley, 7...Center position correction device, 8...Rotary blade, 9...Shaft, 10...Arm, 11...Fixed blade, 12...Carry-out belt, 1
3... Container, 20... Fish body, 21... Dorsal fin, 2
2... Pelvic fin, 23... Ramus, 24... Middle bone, 2
5... Bone part, 26, 27... Fillet part.

Claims (1)

[Scope of Claims] 1. A pair of conveyor belts that grip the midbone of a headless fish body from both sides in the thickness direction of the fish body and convey it in the cranio-caudal direction, and the headless fish body that is conveyed by the conveyor belts. forming pairs on both sides in the dorsoventral direction with respect to the transport route of
circular rotary blades that are provided so as to expand away from each other toward both sides in the dorsoventral direction from the conveyance path, and that cut the headless fish body from the dorsal fin side and the ventral side to the vicinity of the midbone; The blades are fixed at fixed positions near the downstream side in the conveyance direction of the rotary blade and are spaced apart from each other, so that the headless fish bodies that are conveyed while being held by the conveyor belt are cut by the rotary blade. A device for grating three pieces of a fish body, characterized in that it includes a pair of plate-shaped fixed blades for cutting the uncut portion along the back bone.