JPH0731322A - Method of cutting out piece and working stand for cutting out piece - Google Patents

Abstract

PURPOSE:To cut out a piece for culture of high-quality pearl in a high yield. CONSTITUTION:A dented member 20 constituting a box part 12 of a working stand 10 for cutting out pieces is equipped with a fluorescent lamp 24. A working plate 14 having a working surface 14a is attached to a top plate 18. When an overcoat film piece G is placed on the working surface 14a of the working plate 14 and the fluorescent lamp 24 is turned on, light emitted from the fluorescent lamp 24 is transmitted through the top plate 18 and the working plate 14 at various angles and is reached to the overcoat film piece G. Since light is relatively readily transmitted at a preferable site G1 of the overcoat film piece G and an inhibitory texture S relatively slightly transmits light, the preferable site G1 is made light and the inhibitory texture S is made dark to clearly distinguish a boundary B of the site and the texture. Part close to the inhibitory texture S, not containing the inhibitory texture S is readily cut out to provide a piece P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piece cutting method for cutting a piece to be inoculated into a mother shellfish together with a nucleus during pearl cultivation from a mantle piece taken from another shellfish, and a piece cutting piece used for the work. Regarding workbench.

[0002]

2. Description of the Related Art As is well known, cultured pearls are pearl oysters such as pearl oysters, black pearl oysters, and white pearl oysters, which are mother pearls. Inoculate the processed nucleus and a small piece (piece) cut from the mantle piece of pearl oyster,
It is produced by depositing the pearls secreted by the mother oysters on the surface of the nucleus. In cultured pearls, the formation of the nacre and the color of the pearl are greatly influenced by the part of the mantle as a piece, but a good nacre is formed when the thick part near the outer edge of the mantle is used. It has been known.

As shown in FIG. 5, a mantle piece G for cutting out a piece is taken out from the pearl oyster by cutting near the outer edge of the mantle of the pearl oyster along a cutting line C1 (FIG. 5).
(See (a)). Next, the mantle piece G is straightened and cut into a strip shape on a wooden board along the cutting lines C2 and C3. Subsequently, the strip-shaped mantle piece G is cut into a number of strips to form a piece P (see FIG. 5B).

However, on the outer edge side of a portion (hereinafter, referred to as a preferable portion) G1 suitable for the mantle piece P (hereinafter referred to as a suitable portion), a tissue having a property of inhibiting the formation of a good nacre when used as the piece P (hereinafter, the inhibitory property). If the inhibitory tissue S is included in the piece P, the quality of the pearl is extremely deteriorated. On the other hand, it is known that the portion of the mantle adjacent to the inhibitory tissue S is suitable as the piece P. Therefore, it is required to cut out a portion that is as close as possible to the inhibitory tissue S and does not include the inhibitory tissue S to form the piece P.

[0005]

However, it is very difficult for the naked eye to discriminate the boundary B between the preferable site G1 of the mantle and the inhibiting tissue S. Further, in the pearl oyster, a biological component having a black color is attached to the surface of the mantle, which makes it more difficult to distinguish the boundary B between the suitable site G1 and the inhibitory tissue S. The pearl oyster with a small amount of black component can be removed by lightly wiping it, but with the pearl oyster with a large amount of black component, the tissue of the mantle is damaged if wiped enough to remove it. It was difficult to remove it sufficiently.

Therefore, it is extremely difficult to cut out a good piece under the above-mentioned conditions, and the yield is not good even for a skilled person.

[0007]

[Means and Action for Solving the Problem] The first invention of the present application, which is adopted as a means for solving this problem, provides a piece to be inoculated into a mother oyster together with a nucleus during pearl cultivation,
When cutting out from mantle pieces collected from other shellfish,
A gist of a piece cutting method is to cut the piece from the mantle film piece in the presence of transmitted light that passes through the mantle film piece.

The second invention of the present application is a piece cutting work table used for cutting out a piece to be inoculated into a mother shellfish with a core during pearl cultivation from a mantle piece taken from another shellfish. A work plate having a flat work surface and transmitting light in at least a direction intersecting the work surface;
By providing a light source disposed on the back side of the work plate with respect to the work surface, the mantle film piece placed on the work surface can be irradiated with light from the light source. The cutting work table is the main point.

The first and second inventions will be described in detail below. First, the first invention will be described. Since the mother shellfish and the nucleus are well known in the art, description thereof will be omitted. The piece-collecting shell used in the present invention may be any pearl-cultivating shell known in the art, such as pearl oyster, black pearl oyster, white pearl oyster, and is not particularly limited. The mantle piece may be collected from the shell for collecting pieces according to a conventional method.

The mantle film piece collected as described above is placed on, for example, a white translucent plastic plate. In this state, when light is irradiated from the lower surface side to the upper surface side of the plastic plate, this light penetrates the plastic plate and further penetrates the mantle film piece placed on the plastic plate.
At this time, the intensity of the light transmitted through the mantle piece changes depending on the thickness of the transmitting portion, the difference in tissue density, and the like. For example, the transmitted light in a portion having a high tissue density such as a muscular portion is weaker than the transmitted light in a surrounding flesh portion, for example, so that there is a difference in brightness between the flesh portion and the muscular portion.

The preferred portion of the mantle is a portion that relatively allows light to pass therethrough, and the inhibitory tissue adjacent to this portion is a portion that relatively does not allow light to pass therethrough. The inhibitory tissue becomes dark. For this reason, the boundary between the two can be clearly discriminated, and it becomes extremely easy to cut out a portion near the inhibitory tissue and not containing the inhibitory tissue to form a piece.

Even when there is a large amount of black component attached to the mantle, a difference in brightness and darkness occurs due to the relative difference in the amount of transmitted light between the suitable site and the inhibitory tissue, so that the boundary between the suitable site and the inhibitory tissue occurs. Is easy to discriminate, and a piece of good quality can be efficiently cut and collected. The cutting out of this piece may be performed by a method similar to the conventional method.

The member on which the mantle piece is placed is not limited to a white translucent plastic plate, but glass or the like having the same light transmittance can be used. The white translucency is for preventing light that does not hit the placed mantle piece from directly reaching the eyes of the operator. Therefore, it is not necessary to make it white, but it is preferable to use a member capable of dimming the light not hitting the mantle piece so as not to burden the eyes of the operator.

Thus, according to the method of the first invention,
Since the boundary between the suitable site and the inhibitory tissue can be clearly discriminated, a good quality piece can be easily cut out, and the yield is improved. In addition, the second invention of the present application can efficiently perform the piece cutting operation by the first method.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG. 1, FIG. 2 and FIG. 3, the piece cutting work table 10 of the present embodiment has a substantially rectangular parallelepiped box 12 having a space inside and is made of translucent white plastic and has a substantially planar shape. Working plate 14 having working surface 14a and spring 1
This is a structure in which a well-known shell base 16 provided with a clip 16b that is biased by 6a to fix the mother shellfish is attached.

The upper plate 18 of the box 12 is a plate made of the same material as the working plate 14, and the working plate 14 is closely fixed to the upper plate 18. The upper surface plate 18 is joined to a recess member 20 that integrally forms the side wall and the bottom plate of the box portion 12, and an internal space 22 is formed between the upper surface plate 18 and the recess member 20. The inner surface 20a of the recessed material is coated with silver to reflect light from the internal space 22 side and prevent light from entering from the outside.

As shown in FIG. 3, a fluorescent lamp 24 is installed in the recess member 20 at a position substantially just below the center of the work plate 14 and substantially parallel to the work plate 14 and the top plate 18. There is. Also, as shown in FIG.
An electric cord 28 including a switch 26 is connected, and the fluorescent lamp 24 can be turned on by electricity supplied via the electric cord 28.

Next, the piece cutting work table 10 having the above construction.
The case of cutting out the piece P from the mantle piece G will be described. First, as in the prior art, the mantle piece G cut from the pearl oyster and straightened is placed on the work surface 14 a of the work plate 14.

When the fluorescent lamp 24 is turned on in this state, the light emitted from the fluorescent lamp 24 is reflected on the upper surface plate 18 at various angles as direct light L1 and reflected light L2 and L3 on the inner surface 20a of the recess member 20. Incident. The light incident on the upper surface plate 18 is transmitted through the upper surface plate 18 and the work plate 14 and then the mantle film piece G.
Up to Light is uniformly incident on the mantle piece G from almost all directions on the work surface 14a side. A part of the light incident on the mantle film piece G is reflected and absorbed according to the difference in the tissue of the mantle film piece G, but the rest is transmitted through the mantle film piece G and scattered to the outside. At this time, the preferred portion G1 of the mantle piece G is relatively easy to transmit light, and the inhibitory tissue S adjacent to this portion is relatively difficult to transmit light.
1 is bright, and the inhibitory tissue S is dark. For this reason, the boundary B between the two can be clearly discriminated, and it becomes extremely easy to cut out a portion near the inhibitory tissue S and not containing the inhibitory tissue S to form the piece P.

Further, even when there is a large amount of black component attached to the mantle piece, a difference in brightness and darkness occurs due to the relative difference in the amount of transmitted light between the preferable site G1 and the inhibiting tissue S. The boundary B with the tissue S can be easily discriminated, and the piece P of good quality can be efficiently cut and collected. The cutting out of the piece P may be performed by a method similar to the conventional method.

The cut piece P is inserted into the body of the mother oyster in the core insertion work as in the conventional case. Usually, piece P
The piece P is dyed for the purpose of clearly distinguishing it from the tissue of the mother shellfish and accurately attaching the nucleus to the piece P. In the conventional wooden piece cutting work table, this dye sometimes adheres to the work table and the boundary between the piece P and the work table becomes unclear. However, in the work piece cutting workbench 10 of the present embodiment, since the work plate 14 is made of plastic, such a dye does not adhere so much that the boundary between the piece P and the work plate 14 does not become unclear.

Although the present invention has been described above according to the embodiments, the present invention is not limited to such embodiments and can be variously implemented without departing from the scope of the present invention. For example, the material of the work plate and the top plate is not limited to plastic, but frosted glass or the like can be used.

[0023]

As described above, according to the piece cutting method of the first invention, it is possible to cut a high quality piece for pearl cultivation with a good yield. Further, according to the piece cutting work table of the second invention, the first invention can be efficiently implemented.

[Brief description of drawings]

FIG. 1 is a side view of a piece cutting work table according to an embodiment.

FIG. 2 is a plan view of the piece cutting work table of the embodiment with a clip removed.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 of the piece cutting work table of the embodiment.

FIG. 4 is an explanatory view showing a state in which the mantle piece is placed on the piece cutting work table of the embodiment and the fluorescent lamp is turned on.
FIG. 4A is a cross-sectional view around the mantle piece, and FIG. 4B is an explanatory view of light and shade of the mantle piece due to transmitted light.

5 (a) and 5 (b) are explanatory views of a procedure of cutting a piece from the mantle, FIG. 5 (a) is an explanatory view of cutting the mantle piece from the mantle, and FIG. 5 (b) is a piece from the mantle piece. It is explanatory drawing of cutting out.

[Explanation of symbols]

 10 ... Piece cutting work table, 14 ... Work plate, 14a ... Work surface, 24 ... Fluorescent lamp (light source), G ... Mantle piece, P ... Piece.

Claims (2)

[Claims] 1. When cutting out a piece to be inoculated into a mother shellfish together with a nucleus during pearl cultivation from a mantle piece taken from another shell, in the presence of transmitted light passing through the mantle piece, A piece cutting method, which comprises cutting the piece from the mantle piece. 2. A piece cutting work table used for cutting a piece inoculated into a mother shellfish along with a nucleus during pearl cultivation from a mantle piece taken from another shell, which is a flat work. A work plate having a surface and transmitting at least light in a direction intersecting with the work surface, and a light source arranged on the back side of the work plate with respect to the work surface are provided, and thus the work plate is placed on the work surface. A piece cutting work table characterized in that the mantle film piece can be irradiated with light from the light source.