JPH0491747A - Longitudinal dividing of frozen fish and device therefor - Google Patents

Abstract

PURPOSE:To longitudinally divide a fish without damaging especially ovary by equipping a pair of dividing blades to longitudinally cut fish body with a notch part at part of the outer peripheral side of the dividing blade of at least fish ovary side. CONSTITUTION:A frozen fish A1 from which a head part and a tail part are removed and a dosal fin part and a vintral fin part are eliminated so as to be scraped in a channel state in the fish side is placed on a holder 10 to maintain the fish in a fixed attitude. Then, gap G is provided in a zone corresponding to the vertebrate, a pair of disc dividing blades 22 having a notch part 23 at least at part of the outer peripheral side are brought into contact with the channel part from which the dosal fin part and the vintral fin part of the frozen fish A1 are removed and one or both of the dividing blade 22 and the frozen fish A1 is opposingly moved to divide the fish.

Description

[Detailed Description of the Invention] (Objective of the Invention) (Industrial Application Field) The present invention relates to a method and apparatus for longitudinally dividing a frozen fish body, and in particular, to a novel method and apparatus that can remove the fish body without damaging the abdominal cavity. The present invention relates to a method and apparatus.

<Background of the Invention] Before the catches of skipjack tuna, tuna, etc. are provided to final consumers, they must be processed, for example, until the fish meat is shredded, and various processing operations are required during that time. It is desirable to carry out such operations without thawing the fish once it has been frozen, in order to maintain the freshness and taste of the fish. For this reason, various proposals have been made for devices that vertically split the frozen fish body in preparation for unloading three pieces, but these methods merely divide the fish body and cause damage to the abdominal cavity, etc. No attention was paid to that. For this reason, the abdominal part, which could originally be used as a raw material for ``salted fish'', was so damaged that it was discarded instead of being reused.

Technical matters for which development was attempted> The present invention was made in view of this background, and
A new method of freezing that uses the so-called halving method with a high yield and allows for reliable processing of even bent frozen fish bodies, while also allowing processing without damaging the abdominal cavity. This is an attempt to develop a method and device for vertically cutting fish bodies.

(Structure of the Invention) Means for Achieving the Object> That is, the first invention of the present application, which is a method for vertically splitting a frozen fish body, is such that the head and tail are cut off, and the dorsal and pelvic fins are placed on the side of the fish body. A pair of disk-shaped cutting blades with a gap in the area corresponding to the vertebrae are inserted into the frozen fish body, which has been cut out in a groove-like manner, from one end of the frozen fish body. After applying the dorsal and pelvic fins to the grooves for removal, move either or both of the frozen fish body and the cutting blade so that the cutting blade rotates and is pushed to the opposite side, and the fish body is removed. The splitting method is characterized in that the pair of splitting blades have a notch in a part of the outer circumferential side.

Further, the second invention of the present application, a device for longitudinally splitting a frozen fish body, includes a frozen fish holding device that maintains the frozen fish body in a constant posture, and a pair of disk-shaped disks with a gap between the parts of the frozen fish body corresponding to the vertebrae. a cutting tool device having a splitting blade, the holding device and the cutting tool device are configured such that one or both of them are relatively close to each other, and the cutting blade has a notch portion in a part of the outer circumferential side. It is characterized by having.

These inventions attempt to achieve the above object.

<Operation of the Invention> According to the present invention, since the cutting blade is inserted into the frozen fish body sequentially from one end side of the frozen fish body, even if the frozen fish body is curved, the cutting blade is inserted into the frozen fish body in accordance with the bending. Frozen fish body is cut in half. Furthermore, by sequentially applying the cutting blades to the frozen fish body from one end side, the load is not concentrated on the fish body all at once, and smooth vertical splitting work is possible. Furthermore, in the present invention, since there is a notch in a part of the cutting blade, if this notch is operated so as to match the position of the abdominal nest in the fish body, the cutting blade can be cut directly into the abdominal nest. The blade doesn't work,
Vertical division work can be done without damaging this.

<Example> The present invention will be described in detail below based on the illustrated example, but first, preliminary processing of frozen fish bodies will be described with reference to FIG. 8.

Frozen fish body A in the caught state is, for example, bonito, tuna, etc.
When fish are caught in deep-sea fishing, they are plain-frozen in a fishing tank immediately after being caught, and are landed in this state. And Fig. 8(a) to (d)
), the head a1, tail a2, and ventral fin a8 are cut off from the frozen fish A at an appropriate processing factory, and the dorsal fin a4 and ventral fin a5 are cut off to some extent on the frozen fish body side using a cutter or the like. For example, it is formed as a V-shaped groove so as to bite into the groove. The portion of the 7-shaped groove on the other side is defined as the removal groove portion aG. The frozen fish body for which such preparatory work has been completed is indicated by A, and the frozen fish body A after this preparation is completed.
, is vertically divided into two parts according to the present invention. In addition, the code|symbol A2 is the frozen fish body after being divided into two, and A8 is the frozen fish body after being further divided into four parts from the side trunk side. The present invention attempts to provide a method of vertically dividing the frozen fish body AI after preparation to obtain the frozen fish body A2 after being divided into two parts. In the following description, an apparatus for carrying out the invention will first be described, and then the method of the invention will be explained along with a description of its mode of operation.

First, reference numeral 1 denotes a device for longitudinally splitting frozen fish bodies, which is constructed by incorporating a holding bag flO and a cutter device 20 into a frame 2 constructed by appropriately combining materials such as stainless steel. First, the holding device 10 uses a 7-shaped holding trough 11 fixed to the frame 2 as a direct support member, and the fish body supported there is pushed into the blade device 20 (11
1. The pushing bar 12 is fixed at both ends to a pair of left and right chains 13, and moves as the chains 13 move. The drive sprocket 14 and the turn sprocket 15 allow the drive sprocket 14 and turn sprocket 15 to
The trajectory of the movement is set. Reference numeral M designates a motor for driving the drive shaft 14. Further, the holding trough 11 is provided to a position slightly past the cutter device 20, and following this, a receiving trough 16 with a channel-shaped cross section is arranged, and this receiving trough 16 has already been frozen after being divided into two. Fish body A2 is to be received. Next, the cutter device 20 will be explained. This device mainly consists of a pair of upper and lower disc-shaped cutting blades 22 provided on a cutter frame 21, and even when the two are in the closest position, they can cut the vertebrae a7 of the frozen fish body. A blade gap G is formed to provide a range for the blade to pass through. Of course, the cutting blade 22 is inserted into the gap G between the two blades.
An appropriate method can be taken, such as configuring the support shaft portion to be movable so as to adjust the amount.

Further, in this embodiment, the cutting blade 22 is supported in a free state in which it is not actively rotated, but it can also be in a driven state. In particular, the present invention is characterized by the shape of the cutting blades 22, and specifically, a notch 23 is formed in a part of the outer circumferential side of the pair of cutting blades 22. When vertically splitting the frozen fish body A2 after dividing into two as described later, this part coincides with the position of the ventral nest part a3 of the frozen fish body, so that it can be processed without damaging it with the cutting blade 22. . Of course, the notch 2 of the cutting blade 22
3 indicates at least the abdominal nest part a of the fish body among the pair of cutting blades 22.
It may be formed only for those located on the third side.

The present invention is based on the above-described configuration, and first, the state of vertically dividing the frozen fish body A1 will be explained. First, the operator places the frozen fish body A1 from which unnecessary parts have been removed onto the holding trough 11 in the holding bag WIO so that the tail part a2 side faces the cutting blade 22 side, for example. When the motor M is driven to run the chain 13, the push bar 12 moves accordingly, and the frozen fish body A1 on the holding trough 11 is moved to the cutter device 20.
It is moved to the cutting blade 22 side. In such a case, the pair of cutting blades 22 cut the tail az of the frozen fish body A1.
By coming into contact with the removal groove a6 cut in a figure 7 shape on the side and being pushed further, this cutting blade 22 relatively penetrates into the frozen fish body A1, and when it penetrates to a certain extent, the frozen fish body A is removed at once. , is divided into two parts.

Incidentally, this kind of work is possible because fish bones generally exist in the center of the fish body with a cross-shaped cross section, but between them there is a gelatinous thin film whose properties are slightly different from those of the fleshy part. , it is easy to break along that part. When this cutting blade 22 acts, in the present invention, at the beginning of cutting, the part of the cutting blade 22 other than the notch 23 is the frozen fish body A.
1, and the notch 23 in the cutting blade 22 comes into action at the position where it reaches the ventral nest part a3. Therefore, the cutting action of the cutting blade 22 on the frozen fish body A is substantially eliminated, and the fish body A can be divided into two without damaging the abdominal nest part a3 of this part. Incidentally, in this case, the abdominal nest part a3 is actually the frozen fish body A2 after being divided into two parts.
It is taken out in a state where it is fixed to either side of the In most cases, the vertebrae A7 remains on the remaining side and is removed. Furthermore, as understood from the above explanation, this device 1
In this case, when the cutting blade 22 acts on the frozen fish body A2, the part where the notch 23 does not exist must act first, and the notch 23 must act when the abdominal cavity a3 is reached. Therefore, in addition to allowing the cutting blades 22 to rotate freely, the upper and lower cutting blades 22 are connected by a gear 24 so that the timing can be actively set as shown in FIG. 5, and the timing can also be set at all times. Transport chain 1
3 drive system and the gear 24 at the predetermined timing.
The timing may be controlled. Of course, in the case of free rotation, for example, for the cutting blade 22,
Alternatively, it is of course possible to attach an appropriate weight to the support shaft so that the position at which the first action is applied can be set in a free state.

Furthermore, the present invention can be further modified in various ways based on the basic embodiments described above. First, according to the present invention, since the frozen fish body A and the cutting blade 22 are relatively close to each other and the cutting blade 22 only has to act from the tail a2 side, for example, the cutting blade 22 side is made movable. On the other hand, the frozen fish body A1 may be inserted while being fixed at a fixed position.

Incidentally, in many cases, the cutting blade 22 penetrates the frozen fish body AL to a certain extent, and the frozen fish body A is almost completely divided into two parts.
2, it is not necessary to move the cutting blade 22 with a stroke until it completely passes through the frozen fish body AI. Regarding the method of supporting the frozen fish body AI, as shown in Figures 1 to 3, the frozen fish body A1 is placed in an upright position (with the dorsal fin No. 3 facing upward and the pelvic fin A5 facing downward) with its longitudinal direction horizontal. In addition to vertically dividing the machine by placing it on its side, it is also possible to work by laying it horizontally as shown in Fig. 6(a).

Of course, in this case, the cutter surface of the cutting blade 22 is set horizontally and the axis is arranged vertically. In addition to placing the frozen fish body A1 horizontally in this way,
As shown in FIG. 6(b), it is also possible to vertically split the fish body by placing it vertically and moving either or both of the frozen fish body A1 or the cutting blade 22 in the vertical direction. It is. In addition, when carrying out such vertical splitting work, for example, when moving the frozen fish body Aj side, as in this embodiment, the holding device 10 mainly consisting of the trough-shaped holding trough II is moved by the pushing bar 12 for processing. In addition to performing the processing, for example, the holding device 10 may be reciprocated to perform the processing work one part at a time.

Furthermore, as a modification of the cutting blade 22, the one shown in FIG. 7 (
The shape of the cutting blade 22 is not limited to the flat disk shape shown in a), but the shape of the cutting blade 22 can be changed, for example, so that the vertebrae a7 etc. do not remain on either side of the frozen fish body A2 which has been divided into two. As shown in FIG. 7(b), this uses a disk-shaped single-edged blade as the cutting blade 22, and two blades are provided facing each other on the -axis. In this case, the frozen fish body AI itself that is applied is also processed by processing the shape of the removal groove part a6 from which the dorsal fin part a and the pelvic fin part a5 have been removed into a W-shaped groove with the tip of the fish bone as the border. In this way, the cutting blades 22 coaxially provided facing each other can be
The vertebrae a7 remains in between, and the fish flesh on both sides of it is divided.

(Effects of the Invention) As described above, in the present invention, when vertically splitting the frozen fish body A, the cutting blades 22 are operated sequentially from one end side of the frozen fish body AI, which is extremely simple. Reliable division can be achieved based on the configuration. In particular, in the present invention, a notch 23 is formed in a part of the cutting blade 22, and if this cutout is operated so as to match the position of the abdominal nest part a3, the abdominal nest part a3 will be damaged. Vertical division can be achieved without any problems.

As a result, it is possible to reuse the abdominal nest part a3 and the like as a separate salted fish material.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the vertical splitting device for frozen fish bodies of the present invention, Fig. 2 is a longitudinal sectional side view of the same, Fig. 3 is a longitudinal sectional rear view of the same, and Fig.
The figure is an explanatory diagram skeletally showing the state in which the cutting blade acts on a frozen fish body, Figure 5 is an explanatory diagram showing an example in which the cutting blade is actively rotated, and Figure 6 is an explanatory diagram showing the direction in which the frozen fish body is supported. 7 is a sectional view showing the cutting blade used in Figs. 1 to 6 as well as another example of the cutting blade. Fig. 8 is a sectional view showing a frozen fish body. FIG. 3 is an explanatory diagram showing step-by-step a series of processing states from pre-processing to dividing into two and further dividing into four. 1; Frozen fish body vertical splitting device 2; Frame 10; Holding device 11; Holding trough 12; Push bar 13; Chain 14; Drive sprocket 15; Turn sprocket 16; Blade 23; Notch 24; Gear Ao; Frozen fish body A1 in its original form; Frozen fish body A2 after preparation; Frozen fish body A3 after being divided into two parts; Frozen fish body al i after being divided into four parts; Head aZ: Tail part a8; Ventral nest part a4; Dorsal fin part as; Ventral fin part as; Removal groove part a7; Vertebrae G; Blade gap part M; Motor Fig. 3/ Fig. 4 (C7) (b) Fig. 7 (b)

Claims (2)

[Claims] (1) From a frozen fish body whose head and tail have been removed in advance and whose dorsal and pelvic fins have been cut out in a groove-like manner on the fish body side, a gap is created in the area corresponding to the vertebrae. After applying a pair of disk-shaped cutting blades from one end side of the frozen fish body to the groove-shaped removal grooves of the dorsal and pelvic fins of the frozen fish body, while the cutting blades rotate, In the method of splitting the fish body by moving either or both of the frozen fish body or the cutting blade so as to push it to the opposite side, at least the cutting blade on the side of the fish abdominal nest part of the pair of splitting blades is on the outer peripheral side. A method for vertically dividing a frozen fish body, characterized in that a method having a notch part is applied to a part of the body. (2) A frozen fish body holding device that maintains the frozen fish body in a constant posture, and a cutter device that has a pair of disc-shaped cutting blades with a gap between the parts of the frozen fish body that correspond to the vertebrae; Either one or both of the device and the cutter device are configured to be relatively close to each other, and at least one of the pair of cutting blades on the side of the abdominal cavity of the fish body has a notch in a part of the outer circumferential side. A device for vertically splitting frozen fish bodies, characterized by having the following features: