JP2018143166A - Cutting device of raw oyster shell, and oyster peeling method of raw oyster shell cut by cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform cutting of a shell which is comparatively easy in mechanization as a first work for shell peeling of raw oyster having difficulty in mechanization, and as a result, speed of a shell peeing work can be increased.SOLUTION: An oyster shell placing stand is mounted approximately horizontally on the front of a lower blade having a tip facing upward, and an oyster shell is placed on the oyster shell placing stand so that the tip on the reverse ligament side of the oyster shell is placed on the lower blade, and an upper blade having a tip facing downward is lowered to the lower blade automatically by a lowering mechanism, to thereby cut the oyster shell.SELECTED DRAWING: Figure 1

Description

The present invention relates to a raw oyster shell cutting device and a method for stripping raw oyster shells cut by this cutting device. Cultured or natural oysters are landed and then removed from the raw oyster shells (shells with live oysters inside), and then shipped. The oyster shell closes very hard with the powerful force of the scallop (closed shell muscle) and ligament (hinge), and the knife does not open a little when it is inserted into the gap between the shells. Make a hole in the shell while tapping with an oystering tool that has a sharp point and bends inward, and insert the oystering tool deeply into the shell, cut the scallop and open the shell, I was taking it out. This work required skill and power and took a considerable amount of time.

However, since many oysters were landed during the heyday, there was a shortage of manpower due to the recent shortage of manpower, and the processing was not catching up because of being unfamiliar with the work. Therefore, attempts have been made to mechanize these operations. However, carrying raw oysters on a conveyor and automatically peeling them off or peeling them off was not successful due to the various shapes and sizes of oysters. For this reason, it is at most about an open shell that opens the shell, but even if it is said to be an open shell, it is quite difficult to pry the shell automatically or cut the scallop for the same reason as described above.

Japanese Patent Application Laid-Open No. 2004-228561 shows that the tip of an oyster is cut with two blades, and then the scallop is cut with a knife-like instrument to take out the body. However, in the preceding example, two blades are opened and closed horizontally (left and right), and at this time, the oyster shell must be held in the air while being held by hand, and is very unstable. For this reason, the cutting position and cutting direction are difficult to be constant, and it is difficult to handle later. Moreover, although there is a case where the body is not cut, if the extremely end where the body does not exist is cut, the cutting hole is too small and the instrument may not enter.

JP 2005-102675 A

  The problem to be solved by the present invention is that in the cutting of oyster shell, the oyster shell at the time of cutting is placed in a nearly horizontal state so that the posture can be stabilized and cut at an accurate position, and on the side opposite to the ligament The tip is cut so as not to inadvertently open the shell.

Under the above-described problems, the present invention provides a oyster shell stand that is mounted substantially horizontally in front of the lower blade with the blade tip facing upward, and the tip of the oyster shell on the anti-ligament side of the oyster shell. Cutting the raw oyster shell by placing the oyster shell so that the blade rests on the lower blade and cutting the oyster shell by automatically lowering the upper blade with the blade tip facing down to the lower blade with the lowering mechanism A device is provided, in which the upper blade has a convex shape downward and the lower blade has a concave shape, and the lowering mechanism is an oil. Provided means for driving a pneumatic cylinder, electric cylinder, linear motor, piston / crank, or a plurality of mechanisms.

Further, in the present invention, the primary work for conveying or depositing the raw oyster shells cut by any one of the above-described raw oyster shell cutting devices described in claim 4 and the primary work are completed. There is provided a method for oystering raw oysters, comprising a second operation of peeling oysters from raw oyster shells.

According to the invention of claim 1, since the upper blade moves up and down with respect to the lower blade when cutting the oyster shell, if a substantially horizontal shell rest is provided, it may be placed on this, There is no need to hold it by hand. Therefore, the posture of the shell is stabilized and the accurate position can be cut. According to the invention of claim 4, the centering action to the center works by the shape of both the upper blade and the lower blade, and the stability and sharpness at the time of cutting increase.

On the other hand, since it is the open shell that requires the most skill in stripping oysters, if anyone can do this with a little training, it is easy to secure people and can strip large amounts of oysters. Then, if it divides | segments into a 1st operation | work and a 2nd operation | work like invention of Claim 4, an open shell will speed up and the efficiency of oyster stripping will increase as a result. According to the inventor's estimate, the entire oyster stripping is doubled with nearly half the staff.

It is a side view of the raw oyster shell cutting device of the present invention. It is also a front view. It is AA sectional drawing of FIG. It is a principal part side view when cutting an oyster shell with an upper blade and a lower blade.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of the raw oyster shell cutting device of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a cross-sectional view taken along the line AA of FIG. The guide rail 3 is attached to the front surface of the column 2 (referred to as the front side, hereinafter the same), the slider 4 is slidably fitted to the front surface of the guide rail 3, and the face plate is mounted on the front surface of the slider 4. 5 is affixed, and the upper blade 6 with the blade tip facing downward is attached to the lower end of the face plate 5. A lower blade 8 is attached below the upper blade 6 with the blade tip attached to the L-shaped leg 7 placed on the base 1 facing upward.

  The upper blade 6 descends (lifts and lowers) and cuts an object with the lower blade 8. At this time, there are two ways of raising and lowering the upper blade 6. One is to lower the upper blade 6 so as to pass the lower blade 8 as shown in the figure, and to cut by an action like a scissors. At this time, the upper blade 6 descends behind the lower blade 8. The other is to lower the upper blade 6 so as to abut against the lower blade 8 in the same plane, which is closer to crushing than cutting. Since the upper blade 6 and the lower blade 8 cut the oyster shell, the upper blade 6 and the lower blade 8 need a width larger than the cutting width. At this time, the lower blade 8 is concave upward, and the upper blade 6 is convex downward. Is preferred.

A shell stand 9 having a U-shaped cross section with a bottom plate 9a and a side plate 9b is provided on the front side of the lower blade 8. As for the installation method, a substantially L-shaped attachment plate 10 is attached below the bottom plate 9a, and the vertical portion thereof is bolted to the lower blade 8 or the like. At this time, the shell rest 9 is installed in a substantially horizontal posture so that the upper surface of the front end of the bottom plate 9 a coincides with the concave center of the lower blade 8.

  The upper blade 6 is raised and lowered automatically by the lowering mechanism 11. The lowering mechanism 11 may have any structure. For example, a mechanism using an oil / pneumatic cylinder 12 shown in FIG. Specifically, an arm 13 is projected forward from the upper portion of the column 2, and the head side end of the oil / pneumatic cylinder 12 is pivotally supported by a pin 14 and suspended. Then, the bracket 15 is protruded from the face plate 5 near the upper edge of the upper blade 6, and the rod 12 a of the oil / pneumatic cylinder 12 is connected to this by a pin 16. Accordingly, when the oil / pneumatic cylinder 12 is expanded and contracted, the upper blade 6 moves up and down. The oil / pneumatic cylinder 12 is an example, and other than this, an electric cylinder, a linear motor, a piston / crank mechanism, and the like are conceivable.

Next, the case where the oyster shell 17 is cut by the above cutting apparatus will be described. Although the oyster shell 17 has a well-known shape, it is a bivalve shell with a relatively flat lid shell 17b covering the deep shell 17a. A ligament (hinge) is attached to the pointed tip (shell crest 17c). The opposite side is wide and relatively flat, and the mantle is present at the end of the side like a visceral covering. Then, it puts on the shell stand 9 toward the wide direction. At this time, the line at the other end of the upper surface of the lower blade 8 becomes the cutting line, but it is desirable that the cutting depth is not so deep. However, if it is too shallow, it will not be wide enough to open the shell, so it will be in a well-balanced position, but it can be easily learned by experience.

  At the time of cutting, the cutting line is applied to the body part, and there is a fear of cutting the body, but this may be prevented by the mantle of the raw oyster. The mantle is a thin one with a thickness of 0.1 mm or less, but it easily moves (slides) between itself. Therefore, the upper blade 6 and the lower blade 8 can be devised to prevent the body from being cut. If the upper blade 6 and the lower blade 8 in FIG. 4 have an uneven shape and will be described as an example of a scissors-type blade, this can be achieved by appropriately setting the gap R and the overlap margin S between the two blades 6 and 8. Specifically, both the gap S and the polymerization allowance R are very small.

When the gap R is 0.2 mm or more, when the blades 6 and 8 pass each other, the two outer coats on the front and back are folded without being cut, and the four blades 6 and 8 are sandwiched between the blades 6 and 8, It may not be cut by being pushed out of the cutting line. Strictly speaking, the polymerization allowance S is to be crushed, so it is sufficient that the polymerization allowance S is at least close to the start of polymerization. This point is the same for a blade of the type in which the two blades 6 and 8 face each other. Therefore, both the blades 6 and 8 do not need to be sharp and may be square.

  In short, in short, when the oyster shell 17 is placed at a predetermined position of the shell holder 9 and the oil / pneumatic cylinder 12 is started, the upper blade 6 descends and the oyster shell 17 is appropriately cut. At this time, the oyster shell 17 is placed almost horizontally with the bottom plate 9a underneath, so that the posture is stable and it is only necessary to hold it from the top during cutting. . In addition, if both the blades 6 and 8 are formed in the above-mentioned unevenness | corrugation, the oyster shell 17 will approach the center by the aligning action, and a cutting | disconnection will be stabilized more. After the oyster shell 17 is cut, a hole is opened at the cutting point. If a predetermined cutting tool is inserted from here to cut the scallop 17d and the oyster shell 17 is opened, the body can be easily taken out.

  Since only the above-described cutting of the oyster shell 17 does not take a minute, even if it is estimated to be small, 3,000 per hour and 20,000 per day are possible. With this, you can divide the open shells by hand and peel off the oysters. In the past, each person was working on all the oyster stripping processes, with 2,000 pieces per person and 6 people (less than four people), at most 10,000 pieces. In other words, if four people form a team, one person cuts and transports it on a conveyor etc. (primary work), and the rest is shelled (secondary work), the number of labor will be reduced. The efficiency is doubled and 1.5 to 2 times the number of people.

1 Base 2 Column 3 Guide rail 4 Slider 5 Face plate
6 Upper blade 7 L-shaped leg 8 Lower blade 9 Oyster shell stand 9a 板 bottom plate
9b 側 side plate 10 mounting plate 11 lowering mechanism 12 oil / pneumatic cylinder 12a ロ ッ ド rod 13 arm 14 pin 15 bracket 16 pin 17 oyster shell 17a shell 17b lid shell 17c shell top 17d shell column

Claims (4)

Attach the oyster shell stand in front of the lower blade with the blade tip facing upward, and place the oyster shell on the oyster shell stand so that the tip of the oyster shell on the anti-ligament side rests on the lower blade. An apparatus for cutting raw oyster shells, wherein the upper blades facing downward are automatically lowered by the lowering mechanism to the lower blades to cut the oyster shells. The raw oyster shell cutting device according to claim 1, wherein the upper blade has a convex shape and the lower blade has a concave shape. 3. The raw oyster shell cutting device according to claim 1 or 2, wherein the lowering mechanism uses one or more of an oil / pneumatic cylinder, an electric cylinder, a linear motor, and a piston / crank as a drive source. A primary operation for transporting or depositing raw oyster shells cut by the raw oyster shell cutting device according to any one of claims 1 to 3, and a secondary operation for removing oysters from the raw oyster shell after the completion of the first operation. A method for stripping raw oysters.