JPH0420239A - Method and apparatus for longitudinally slitting frozen fish body - Google Patents

Abstract

PURPOSE:To smooth vertical splitting operation of a frozen fish body by subjecting the frozen fish body to specific pretreatment, applying a pair of cut-in blades from the one end side of the aforementioned fish body to the dorsal fin part and the abdominal fin part hollowed out in a grooved form, moving the blades and longitudinally splitting the fish body. CONSTITUTION:A frozen fish body (A1) in which the head part and the tail part are previously excised and the dorsal fin part and the abdominal fin part are excised so as to be hollowed out in a grooved form to the side of the fish body is placed in a longitudinal splitter composed of a holding device 10 and an edged tool device 20 composed of a stainless steel material, etc., fixed with a setting rod 13 of the aforementioned holding device 10 and made to always deviate to the central side. Furthermore, central guides 16 respectively provided with a roller are further oppositely installed in the upper and lower parts and brought into contact with the grooved parts of the fish body (A1), deviated to the central side and simultaneously led to a pair of disklike cut-in blades 22. Either of the fish body (A1) placed on the holding device 10 and the cut-in blades 22 or both are subsequently moved to preform the objective operation with the pair of disklike cut-in blades 22 installed in the edged tool device 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) <Industrial Application Field> The present invention relates to a method and apparatus for longitudinally splitting a frozen fish body.

<Background of the Invention> Before the catches of bonito, 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 when it has been frozen, from the viewpoint of maintaining the freshness and flavor of the fish. For this reason, various proposals have been made regarding devices for vertically cutting frozen fish bodies in preparation for cutting them into three pieces.

<Prior art and unresolved issues> For example, Japanese Patent Publication No. 53-9993 and Japanese Patent Publication No. 52-2708
No. 02 etc. exist, which discloses a method of vertically cutting frozen fish bodies in half in order to improve the yield. Specifically, the dorsal and ventral fins of the frozen fish are cut into a figure 7 shape that cuts into the fish meat side, and a cutting blade is applied from above and below along the longitudinal direction of the frozen fish, along the grooves. By moving the cutting blades close to each other, the frozen fish body is vertically halved from the center. However, with this method, there is a problem that the frozen fish bodies that are actually supplied are not necessarily straight, but are often curved, and in cases 1 and 2, processing cannot be carried out smoothly. In addition, although the cause is not necessarily clear, when the cutting blades are brought close together all at once, the frozen fish body is not cut in half, and the fish meat locally collapses in the area where the cutting blades act. For these reasons, this conventional technology is fully usable for practical use.
The nature of i! It is not available on the market.

Of course, in light of such prior art, there have been attempts to provide the market with devices that discontinue the so-called method of splitting frozen fish bodies into three pieces using a double-grind band saw method, but the fish flesh around the vertebrae remains At present, the user industry of this device is hesitant to introduce it because it cuts out a large amount and seriously reduces yield.

Technical matters for which the development was attempted> The present invention was developed in view of the above background and prior art, and is based on the premise of adopting the so-called halving method, which has a high yield, and is based on the premise that the frozen fish body is curved. This is an attempt to develop a new method and device for vertically dividing frozen fish bodies, which can be processed reliably even if there is a problem.

(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, involves cutting off the head and claws in advance, and cutting the dorsal and pelvic fins into grooves on the fish body side. A pair of cutting blades with a gap formed in corresponding parts of the frozen fish body are cut into grooves in the frozen fish body from one end side of the frozen fish body. The method is characterized in that either the frozen fish body or the splitting blade, or both, are moved to push the frozen fish body or the cutting blade to the opposite side after applying it to the removal groove of the dorsal fin and pelvic fin, which are hollowed out in the shape of a shape. It is what it is.

In addition to the above-mentioned requirements, the second invention of the present application, a method for longitudinally splitting a frozen fish body, is characterized in that the pair of splitting blades is disc-shaped.

Furthermore, the third invention of the present application, a device for vertically dividing a frozen fish body, includes a frozen fish body holding device that maintains the frozen fish body in a constant posture, and a pair of splits that are spaced apart from each other in a portion of the frozen fish body that corresponds to the vertebrae. A cutting tool device having a blade, and the holding device and the cutting tool device or both are configured to be relatively close to each other.

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.

<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. 6.

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. Then, in an appropriate processing factory, the frozen fish body An is processed into a head a1, a claw part a2, and an abdominal nest part a3.
are cut out, and the dorsal fin part a4 and the pelvic fin part a5 are cut into the frozen fish body side by a cutter or the like to form, for example, a 7-shaped groove. The 7-shaped groove portion on this surface is defined as the removal groove portion a6. The frozen fish body for which such preparatory work has been completed is indicated by A1, and the frozen fish body A1 after this preparation is completed is vertically divided into two parts according to the present invention. In addition, code A2 is the frozen fish body after splitting into two, A3
This is the frozen fish body after it was further cut into quarters from the side trunk side. In the present invention, frozen fish body A after preparation is completed,
This paper attempts to propose a method of vertically dividing the frozen fish body A2 into two parts to obtain the frozen fish body A2.

First, reference numeral 1 denotes a device for longitudinally splitting frozen fish bodies, which is constructed by incorporating a holding device 10 and a cutter device 20 into a frame 2 constructed by appropriately combining materials such as stainless steel. First, the holding device 10 is slidably attached to the frame 2 using a slide rod 10a fixed to the frame 2 as a direct support member, and a slide guide 10b fitted onto the slide rod 10a. Of course, other appropriate methods may be used to attach the holding device 10 to the frame 2 in a movable manner. It may be configured to simply slide on a guide plate using a chain or the like, or to use a dovetail-like sliding mechanism. This holding device 1
o has a push plate 11 at one end thereof that comes into contact with one end of the frozen fish body A1, for example, the cut surface on the head al side, and a support plate 12 is formed on the lower surface of the push plate 11, and the push plate 11 and the support plate are connected to each other. A slit S is formed in the center of the plate 12 to allow passage of a cutting blade 22 in a cutter device 10, which will be described later. The pushing plate 11 of this holding device 10 is provided with a pair of left and right setting rods 13 for holding the frozen fish body A1 that is the workpiece, and these rods are always biased toward the center by a spring 14. The state is set to Furthermore, this holding device 1o is a shifter 1.
The sliding operation is performed by 5, and the first to third
The embodiment shown in the figure uses a cylinder as the shifter 15, as an example. Of course, this shift mechanism itself may be implemented using any appropriate method, and may include an appropriate drive mechanism such as a chain, a screw shaft, a rank and pinion mechanism, or the like.

In order to more reliably perform the vertical splitting operation of the frozen fish body A in this holding device 10, a separate centering guide 16 is provided on the frame 2 side. In this device, for example, an arm 16a is installed vertically opposite to each other, and an arm 16a provided with a roller on the free end side is constantly connected to a frozen fish body AI by an appropriate spring 17.
The frozen fish body A to which the roller serving as the tip of the center guide 16 is applied
, so that the center thereof is guided to a cutting blade 22 in a cutter device 20, which will be described later.

Next, the blade device 20 will be explained. This device has a pair of upper and lower disc-shaped cutting blades 2 provided on a blade frame 21.
2, and both of them form a gap G between the blades so as to leave a range of the vertebrae a7 of the frozen fish body even in the closest state. Of course, an appropriate method can be used for the cutting blade 22, such as configuring the support shaft portion to be movable so that the gap G between the two blades can be adjusted. In addition, in this embodiment, the cutting blade 22
is supported in a free state without active rotational drive, but it can also be in a driven state.

The present invention is based on the above-described configuration, and first, the state of vertically dividing frozen fish AI will be explained. First, the operator places the frozen fish body A1 after completion of preparation, from which unnecessary parts have been removed, on the support plate 12 of the holding device 10 so that, for example, the frozen fish body A1 faces the side aZ of the cutting blade 22. At this time, the pushing plate 11 comes into contact with the cut surface of the frozen fish body A1 on the head al side, while the support plate 12 supports the lower surface of the frozen fish body A2, and the setting rod 13 is placed vertically. Frozen fish body A
Hold the tO side body part between them. In this state, a part of the plurality of center guides 16 comes into contact with the removal groove part a6 on the leg part a2 side of the frozen fish body A, and the center position is almost set. After such a preparation state is completed, when the shifter 15 is driven by an appropriate switching operation and the frozen fish body A1 is moved to the cutter device 20 side, the pair of cutting blades 22 cut the frozen fish body Δl on the claw part al side. By coming into contact with the removal groove a6 cut in a single character shape and being pushed further, the cutting blade 22 relatively penetrates into the frozen fish body Δ1, and when it penetrates to a certain extent, the frozen fish body A1 is completely removed. It will be divided.

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 that of the fleshy parts. Therefore, it is easy to crack along that part.

Various further modifications are possible based on the basic embodiment 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 A may be inserted while being fixed at a certain position. Incidentally, in many cases, the cutting blade 22 penetrates halfway into the frozen fish body A1, resulting in a frozen fish body Δ2 that is almost completely divided into two parts, so the cutting blade 22 does not penetrate until it completely passes through the frozen fish body AI. It is not necessary to move it with a stroke of . Regarding the method of supporting the frozen fish body A, as shown in Figures 1 to 3.5, the frozen fish body A is placed in an upright position (with the dorsal fin A4 facing upward and the pelvic fin A5 facing downward). In addition to vertically dividing work with the machine placed horizontally, it is also possible to work with the machine lying horizontally as shown in Figure 4(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 the longitudinal direction, as shown in FIG. 4(b), the long direction is placed vertically.
It is also possible to perform the vertical splitting operation by moving either or both of the frozen fish body A1 and the cutting blade 22 downward. In carrying out such a vertical splitting operation, for example, when moving the frozen fish Al side, the holding device 10 can be reciprocated to perform the processing operation one by one. It is of course possible to sequentially transport the frozen fish bodies A1 and process them continuously.

Furthermore, as a modification of the cutting blade 22, the one shown in FIG. 5 (
The shape of the cutting blade 22 is not limited to the flat disc shape shown in a), but the shape of the cutting blade 22 may be changed, for example, so that the vertebrae 37 etc. do not remain on either side of the frozen fish body Δ2 which is divided into two parts. As shown in FIG. 5(b), this uses a disc-shaped single-edged blade as the cutting blade 22, and one piece is provided oppositely on each axis. In this case, the frozen fish body AI itself that is applied can also be processed in advance into a W-shaped groove from which the dorsal fin part a4 and the pelvic fin part aS are removed, with the shape of the removal groove part a6 bordering on the tip of the fish body. desirable. In this way, the cutting blades 2 are coaxially provided facing each other.
The iL bone skeleton 7 remains between the two, and the fish meat portions on both sides of it are divided. Furthermore, the cutting blade 22 is ζ
It does not have to be in the shape of a disk like the Bo-Zushimogo, and it may be in the shape of a fixed rudder force as shown in FIG. 5(C). In short, any condition is sufficient as long as the cutting blades 22 act sequentially from one end side.

(Effects of the Invention) As described above, in the present invention, when vertically splitting the frozen fish body A, the cutting blades 22 are sequentially applied from one end side of the frozen fish body A1, which is extremely simple. Reliable division can be achieved based on the configuration.

[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 side view of the same, FIG. 3 is a plan view of the same, and FIG. 5 is a sectional view showing various embodiments of the cutting blade, and FIG. 6 is a sectional view showing a series of processing states from pretreatment of a frozen fish body to dividing it into two and further dividing it into quarters. It is an explanatory diagram shown step by step. 1; Frozen fish body vertical splitting device 2; Frame 10; Holding device 10a; Slide rod 10b; Slide guide 11; Push plate 12; Support plate 13; Setting rod 14; Spring 15; Shifter 16; Center guide 16a; Arm 17; Spring 20; Blade device 21; Blade frame 22; Cutting blade Ao; Frozen fish body A1 in its original form; Frozen fish body A2i after preparation; Frozen fish body A3 after being divided into two parts; Frozen fish body al after being divided into quarters; Head a2; Tail part aS; ventral nest part a4; dorsal fin part aS; ventral fin part a6; removal groove part a7 i vertebrae G; cutter gap part S; slit division part C ・4 ζ)

Claims (3)

[Claims] (1) The head and tail are removed in advance, and the dorsal and pelvic fins are cut out in a groove-like manner on the fish body side, and then a gap is created in the part corresponding to the vertebrae. A pair of cutting blades are inserted into the frozen fish body from one end side to the dorsal fin part of the frozen fish body, which is hollowed out in the form of a groove;
A method for longitudinally splitting a frozen fish body, characterized in that either the frozen fish body or the cutting blade, or both, are moved so as to be pushed to the opposite side after being applied to the removal groove of the abdominal fin. (2) The method for vertically splitting a frozen fish body according to claim 1, wherein the pair of cutting blades are disc-shaped. (3) A frozen fish body holding device that maintains the frozen fish body in a constant posture, and a cutter device having a pair of cutting blades with a gap formed in a portion corresponding to the vertebrae of the frozen fish body, the holding device and the cutter device 1. An apparatus for longitudinally splitting a frozen fish body, characterized in that one or both of the and the above are configured to be relatively close to each other.