JP2021134562A - Reviving disc member of ryukyu limestone and method for manufacturing the same - Google Patents

Abstract

To provide a reviving disc member of Ryukyu limestone which secures not only a strength but also an appearance quality even when a through hole appears in a main part of limestone of Ryukyu limestone formed into a disc-like body, and converts it into a product utilizing a size of the disc-like body, and a method for manufacturing the reviving disc member.SOLUTION: A reviving disc member of Ryukyu limestone includes: a limestone main part 2 that is composed of Ryukyu limestone, in which at least one surface on a front face side is formed into a flat disc-like body, and a through hole 21 composed of an irregular porous wall 211 penetrates from a board surface on a front face 2a side to a board surface on a rear face 2b side; and a transparent or translucent resin-made replenishment part 3 that is composed of a cured part R of a resin molding material, is joined and integrated with the limestone main part 2 by filling the through hole 21, and has a front face side flat surface 3a of the cured part R according to the flat board surface on the front face 2a side formed in a hole opening 210 of the through hole 21 appearing on the front face side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a resuscitated disc-shaped member of Ryukyu limestone, which is cut into a disc-shaped body and commercialized for building members, tables, cabinet top plates, etc., and a method for producing the same.

Natural stones such as Ryukyu limestone are cut out in the form of roughly rectangular large lumps at the production area, and are transported from the production area to a stone processing maker. A stone processing maker cuts the large lump to a predetermined thickness and processes it into a disc-shaped product, but since natural stone is used, there are lumps that cannot be used as a disc-shaped product at the processing stage. ..
Therefore, some inventions have been proposed that effectively utilize the unusable mass portion (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-127134

However, Patent Document 1 describes, as described in claim 1, "a pseudo stone obtained by cutting from a base stone formed by mixing natural stone in concrete, and cutting a natural stone having a maximum diameter of at least 100 mm or more on the cut surface. It is limited to the invention of "pseudo-stone, which is characterized by including a surface". Since concrete surrounds natural stone, even if it is used effectively, its commercial value will be lower than that of natural stone. Even if natural stone is expensive, it is only offered as a low-cost material for cheap products.
In addition to the above-mentioned artificial stones, the masses of this Ryukyu limestone that are out of the product specifications have been offered at low prices as small-sized materials such as crushed stones and Machi stones.

A stone processing maker usually first cuts a large block of natural stone into a disc-like body and proceeds to the next product process. When the natural stone is Ryukyu limestone, it is mainly reef limestone formed by the action of coral reefs, and when it is finished cutting into a disc-shaped body for commercialization, it is cut into a disc-shaped body even if it is not on the outer surface of the large mass. A through hole may appear on the outer surface side plate surface that penetrates to the opposite side plate surface. In such a case, there is a risk of insufficient strength for use as a Ryukyu limestone disc product, and a disc-shaped body with through holes has not been commercialized as a final product.
If the disc-shaped body has such a defective portion of the through hole and is out of the product standard, the expensive one is crushed into small pieces and used for the pseudo stone, crushed stone, machi stone or the like. Even if a non-standard disc-shaped body is used, it takes time and cost to crush it into small pieces, and yet there is a problem that only low-priced products can be produced.

The present invention solves the above-mentioned problems, and even if a through hole appears in the main part of the limestone of Ryukyu limestone formed in the disc-shaped body, not only the strength but also the appearance quality and the like are ensured, and the disc-shaped body has the same appearance quality. It is an object of the present invention to provide a resuscitated disc-shaped member of Ryukyu limestone which can be made into a product utilizing the size, and a method for manufacturing the revived disc-shaped member.

In order to achieve the above object, the gist of the invention according to claim 1 is made of Ryukyu limestone, and at least one surface side thereof is formed into a flat plate-like body, from the surface side surface to the back surface side. It consists of a limestone main part through which a through hole created by an uneven hole wall penetrates and a hardened part of a resin molding material. A Ryukyu limestone characterized by comprising a transparent or translucent resin replenishment portion in which a surface-side flat surface of the hardened portion is formed in accordance with the flat surface-side plate surface at the hole opening. It is in the resuscitation board-like member. The resuscitated disc-shaped member of Ryukyu limestone, which is the invention of claim 2, is formed in claim 1 in which the back surface of the main portion of the limestone opposite to the flat surface side plate surface is also formed on a flat plate surface and is formed in a rectangular shape in a plan view. Further, the resin molding material is a resin molding material which is liquid at room temperature and contains a thermosetting resin as a main material. The resuscitation disc-shaped member of Ryukyu limestone, which is the invention of claim 3, is two limestone halves in which the main part of the limestone is divided and arranged with a groove in between, and the hardening of the resin molding material. The groove is filled and integrated into the two limestone halves, and the surface side of the hardened portion is aligned with the flat surface side plate surface of the limestone halves at the groove mouth on the surface side of the groove. It is characterized by further including a transparent or translucent resin joint portion on which a flat surface is formed. The resuscitated disc-shaped member of Ryukyu limestone, which is the invention of claim 4, has a concave-convex portion that is intertwined and exposed in the thickness direction and the width direction on the side end surface of the disc-shaped body related to the main portion of the limestone according to claim 2 or 3. On the other hand, the uneven portion is filled with the hardened portion, joined and integrated with the side end surface of the limestone main portion, and has flat surfaces on the front surface side and the back surface side matched to the flat front surface side and back surface sides, respectively. Then, a transparent or translucent resin replenishment plate portion extends outward from the side end surface with a thickness matching the plate-like thickness of the limestone main portion, and further, a side peripheral end surface of the replenishment plate portion. Is characterized by being formed smoothly. The resuscitation board-shaped member of Ryukyu limestone, which is the invention of claim 5, is characterized in that, in claim 4, the replenishment board portion is joined and integrated with the limestone main portion to form a rectangular shape in a plan view. The resuscitation disc-shaped member of Ryukyu limestone, which is the invention of claim 6, is characterized in that, according to claims 2 to 5, the resin molding material is a resin molding material which is liquid at room temperature with unsaturated polyester resin as the main material. do. The resuscitator-like member of Ryukyu limestone according to claim 7, wherein the limestone main portion having a rectangular shape in a plan view is provided, and the flat surface side plate surfaces thereof are flush with each other with a gap. The hardened portion serves as a joint portion that fills the gap, and is joined and integrated with the limestone main portion that creates the gap.
The gist of the invention according to claim 8 is made of Ryukyu limestone, and at least one surface on the front surface side is formed into a flat plate-like body, and the plate surface on the front surface side to the plate surface on the back surface side is formed by an uneven hole wall. A resin molding material that is liquid at room temperature to form a transparent or translucent hardened portion is applied to the back surface side of the limestone main portion through which the through hole penetrates, and then the back surface side thereof is facing down. The portion is placed in the concave mold and the resin molding material injected into the concave mold fills the through hole to immerse the limestone main portion, and then the resin molding material is cured to cure the limestone main portion. Made of a resin made of a transparent or semi-transparent hardened portion having a surface-side flat surface matching the flat surface-side board surface at the surface-side hole opening of the through-hole, which is joined and integrated with the limestone. It is a method for manufacturing a resuscitation disc-shaped member of Ryukyu limestone, which is characterized by forming a replenishment part. The method for producing a resuscitated disc-shaped member of Ryukyu limestone, which is the invention of claim 9, is the resin molding material according to claim 8, wherein the resin molding material is a resin molding material liquid at room temperature using an unsaturated polyester resin as a main material. The resin molding material is embedded in the pores and cured at room temperature to mold the resin replenishment portion.

In the method for producing a revived disc-shaped member of Ryukyu limestone and the revived disc-shaped member of the present invention, a disc-shaped body of Ryukyu limestone, which has been difficult to make into a product due to the size of a through hole found on the plate surface, is used. It can be revived as a good product while maintaining the size, and by making the hardened part transparent or translucent, the natural expression created by the hole wall of the through hole can be visually recognized, making it a product that creates higher added value. It has a great effect such as becoming.

It is a perspective view of the resuscitation board-like member of Ryukyu limestone of Embodiment 1. FIG. It is a perspective view of the resuscitation board-like member of Ryukyu limestone of Embodiment 2. In the third embodiment, (a) and (b) are schematic plan views showing a manufacturing process of a resuscitated board-shaped member of Ryukyu limestone, and (c) is a resuscitated board formed through the steps (a) and (b). It is a top view of a member. It is explanatory cross-sectional view which shows each manufacturing process of the resuscitation board-shaped member of FIG. 1 in the order of (a) to (d). It is an explanatory cross-sectional view which shows the manufacturing process which follows FIG. 4 (d), and (c) is the VV line sectional view of FIG. It is explanatory plan view which arranged a plurality of limestone main parts in a concave shape with a gap. (B) is an explanatory plan view in which a joint portion is formed in the gap of FIG. 6, and (c) is a sectional view taken along line VII-VII of (b). It is explanatory image figure of FIG. It is an image diagram of FIG. 3 (c). FIG. 6 is an explanatory image diagram of FIG. 6 (a). It is an image diagram of a stand formed by using a plurality of resuscitator-like members of Ryukyu limestone shown in FIGS. 1 and 3.

Hereinafter, the resuscitation board-shaped member of Ryukyu limestone according to the present invention (hereinafter, also simply referred to as “resuscitation board-shaped member”) and the manufacturing method thereof will be described in detail.
1 to 11 are one embodiment of the resuscitated board-shaped member of the present invention and a method for manufacturing the same, FIG. 1 is a perspective view of the resuscitated board-shaped member of the first embodiment, and FIG. 2 is a perspective view of the resuscitated board-shaped member of the second embodiment. FIGS. It is a top view of the disc-shaped member. 4 is a cross-sectional view showing the manufacturing process of FIG. 1, FIG. 5 is a cross-sectional view showing the manufacturing process following FIG. 4 (d), (c) is a VV line cross-sectional view of FIG. A plan view in which a plurality of portions are arranged, FIG. 7 (b) is a plan view in which joints are formed in the gap of FIG. 6, (c) is a sectional view taken along line VII-VII of (b), and FIG. 8 is an image view of FIG. 9, FIG. 9 is an image diagram of FIG. 3 (c), FIG. 10 is an image diagram of FIG. 6 (a), and FIG. 11 is an image diagram of a stand formed of a resuscitation board-shaped member. In order to make each figure easier to understand, the main parts are highlighted, and parts not directly related to the present invention are omitted.

(1) Ryukyu limestone resuscitation disc-shaped member (1-1) Embodiment 1
The main resuscitation disc-shaped member 1 is a disc-shaped body as shown in FIGS. 1 and 5 (c), and includes a limestone main portion 2 and a replenishment portion 3.
The limestone main portion 2 is made of Ryukyu limestone, and at least one surface on the front surface 2a side is formed into a flat plate-like body, and a through hole 21 penetrates from the plate surface on the front surface 2a side to the plate surface on the back surface 2b side. Ryukyu limestone is a limestone stratum widely distributed in the Nansei Islands. It is formed by the action of corals, mollusks, lime algae, etc., and is mainly composed of reef limestone in which the remains of these are accumulated.

Ryukyu limestone, which is transported to a stone maker in the form of a large mass, is cut to a predetermined thickness t2 into a disc shape, and in addition to the recess 240, the hole 210 of the through hole 21 appears on the cut surface 2a. It may be the main part 2 of the limestone as shown in FIG. The recess 24 is a recess as shown in FIG. 5 (c) that does not reach the back surface 2b of the limestone main portion 2, and can be used as it is if it is not particularly large. There is a possibility that the main part 2 of the limestone where the limestone is present is not strong enough. Since the Ryukyu limestone became rock in the through hole 21 due to the diagenesis of the body such as coral, the through hole 21 itself is often large or the hole mouth 210 is often widened like a crack. Moreover, the uneven surface 211a of the hole wall 211 forming the through hole 21 is severe and uneven.

In the limestone main portion 2, the front surface 2a side of the disc-shaped body is a flat plate surface, but the back surface 2b on the opposite side is also preferably formed on a flat plate surface. This is because the applications are expanding. In order to increase versatility, it is more preferable to form a rectangular shape in a plan view. Here, the disc-shaped body of the present invention includes a plate body in which the front surface 2a and the back surface 2b are flattened. The plate has a thickness t2 in the range of 1.0 cm to 4.0 cm.
In the present invention, the hardened portion R of the resin molding material is joined and integrated into the through hole 21, the main portion 2 of the limestone is strengthened, and a plate-shaped member including the through hole 21 can be commercialized with the large plate surface as it is. to enable. A replenishment portion 3 is provided in which the hardened portion R is filled in the through hole 21 appearing on the surface 2a of the disc-shaped body cut to a predetermined thickness from the large massive Ryukyu limestone, and integrated with the limestone main portion 2. When the dent 24 appears, a stuffing portion 7 is provided to fill and integrate the cured portion R.

The replenishment portion 3 is a resin solid composed of a hardened portion R of the resin molding material, which fills the through hole 21 and is joined and integrated with the limestone main portion 2. A flat surface 3a on the surface side of the hardened portion R that matches the flat surface side plate surface 2a is formed at the hole 210 of the through hole 21 that appears on the surface 2a side of the limestone main portion 2.
Here, in the present invention, the "resin replenishment portion in which the surface-side flat surface of the hardened portion is formed in accordance with the flat surface-side plate surface at the hole opening of the through hole appearing on the surface side of the limestone main portion". Is not only the case where the surface side flat surface 3a coincides flush with the surface side plate surface 2a as shown in FIG. 5 (c), but also the case where the hardened portion R is formed on the limestone main portion surface 2a as shown in FIG. 5 (b). A replenishment portion 3 in which the thin film layer R1 is provided and the flat surface 3a of the cured portion R that fills the hole 210 is flush with the surface of the thin film layer R1 and aligned with the surface level of the surface side plate surface 2a is also included. This is because the one in this state has the same effect as that of FIG. 5 (c). The thin film layer R1 formed by the resin molding material has a surface gloss and watertightness more than that of the limestone main portion surface 2a, and may be rather preferable depending on the application.
In the present embodiment, the limestone main portion 2 is formed into a rectangular plate, and the hole back opening 219 that appears on the back surface 2b side thereof is also formed with the back surface side flat surface 3b of the hardened portion R that matches the back surface side plate surface 2b. The replenishment part 3 made of the resin hardened part R is transparent or translucent, and through the replenishment part 3, there is a hole having an uneven surface 211a of a through hole 21 which is a natural appearance of Ryukyu limestone without human intervention. The wall 211 can be visually recognized. Its natural look enhances product value. The fact that the replenishment portion 3 in the present invention is translucent means that it is sufficient if the hole wall 211 can be visually recognized through the hardened portion R of the replenishment portion 3.

The resin molding material of the replenishment unit 3 may be a thermoplastic resin, but is preferably a resin molding material that is liquid at room temperature and contains a thermosetting resin as a main material. Since it is liquid at room temperature, it is easy to manufacture the resuscitator-shaped member 1. Further, it is more preferable that the resin molding material is a resin molding material which uses an unsaturated polyester resin as a main material, has a substantially colorless and transparent appearance, and is easy to use and is liquid at room temperature. When the inside of the through hole 21 is filled with a viscous liquid resin molding material containing, for example, methyl ethyl ketone peroxide (MEKP) as a main catalyst and, for example, cobalt naphthenate as an accelerator, it can be cured at room temperature. The molding mold of the replenishing unit 3 can be simplified, and molding becomes easier. A resin replenishment portion 3 composed of a colorless or translucent cured portion R is formed. When the liquid resin molding material penetrates into every corner of the through hole 21 and hardens, it bites into the hole wall 211 having the uneven surface 211a of the through hole 21.
The replenishment portion 3 which fills the through hole 21 of the limestone main portion 2 and forms the surface side flat surface 3a which matches the surface side plate surface 2a of the limestone main portion 2 at the hole opening 210 bites into the uneven hole wall 211 and anchors. It is a desired resuscitation disc-shaped member 1 that exerts its effect and is firmly integrated with the limestone main portion 2.

As the resin molding material, a liquid resin such as an epoxy resin or a diallyl phthalate resin can be used as the main material, but an unsaturated polyester resin capable of forming the transparent or translucent replenishment portion 3 at a relatively low cost is preferable. The unsaturated polyester resin has excellent fluidity and adhesiveness, and is required to have a bonding force with the limestone main portion 2. It will be perfect as. When an unsaturated polyester resin is used as the main material, the catalyst may be cured at room temperature using benzoyl peroxide (BPO) as the main component of the catalyst and dimethylaniline as the accelerator instead of MEKP and cobalt naphthenate described above. Additives such as stabilizers, reinforcing agents, fillers and colorants are appropriately added to the resin molding material.

(1-2) Embodiment 2
As shown in FIG. 2, the resuscitation disc-shaped member 1 includes a limestone main portion 2, a replenishment portion 3, and a replenishment plate portion 5. FIG. 8 is an image diagram of FIG.
In addition to the through hole 21 of the first embodiment, the main limestone portion 2 has an uneven portion 251 on the side end surface 25 of the disc-shaped body that is intertwined and exposed in the thickness direction and the width direction of the disc-shaped body. The rock surface of Ryukyu limestone may appear as it is on the side end surface 25 of the limestone main portion 2 cut into a disc shape from Ryukyu limestone. The rock surface portion changes in unevenness not only in the thickness direction of the disc-shaped body but also in the width direction of the side end surface 25, but since the strength is insufficient, the rock surface portion has been cut off and commercialized in the past. However, the rock surface is a beautiful part where the natural expression created by the coral reef appears, and if the strength can be secured, it can be used not only for building materials but also for table tops and decorations. In the present embodiment, not only the replenishment portion 3 for filling the through hole 21 but also the replenishment plate portion 5 for filling the uneven portion 251 of the side end surface 25 and adjusting the shape is further provided.

The replenishment board portion 5 is made of a resin in which the uneven portion 251 exposed on the side end surface 25 of the limestone main portion 2 is filled with the hardened portion R of the same resin molding material as the replenishment portion 3 and joined and integrated with the limestone main portion 2. It is solid. Reference numeral 55 indicates a joint surface with the side end surface 25.
Specifically, it has flat surfaces 5a and 5b on the front surface side and the back surface side that match the flat front surface side and back surface side board surfaces 2a and 2b of the limestone main portion 2, respectively, and the limestone main portion is formed from the side end surface 25. The resin replenishment plate portion 5 is formed so as to extend outward at a thickness t5 that matches the plate-like thickness t2 of 2. Further, the side peripheral end surface 56 of the replenishment plate portion 5 is smoothly formed, and the replenishment plate portion 5 is joined and integrated with the limestone main portion 2. In the present embodiment, the back surface 2b of the main portion of the limestone and the back surface 5b of the replenishment plate portion are made flush with each other, and finally, a resuscitation plate-like member 1 of a rectangular plate in a plan view as shown in FIG. 2 is obtained. In the plan view of the resuscitation disc-shaped member 1, the area of the limestone main portion 2 is set to be larger than the area of the replenishment disc portion 5. To the last, it is a replenishment board part 5 that replenishes the limestone main part 2 of the main part, and is a resuscitation board-like member as it is a large limestone main part 2 having the uneven part 251 by making use of the uneven part 251 whose rock surface is exposed on the side end surface 25. This is because it is to be 1.
Like the replenishment part 3, the replenishment board part 5 is also transparent (or translucent) as shown in FIG. 8, and through the replenishment board part 5, the natural expression created by the Ryukyu limestone coral reef exposed on the side end surface 25 can be visually recognized. can.

The replenishment plate portion 5 which fills the uneven portion 251 where the rock surface of the limestone main portion 2 is exposed and is joined and integrated with the side end surface 25 not only depends on the adhesive force of the resin molding material, but also has unevenness on the plate-shaped side end surface 25. The hardened portion R of the resin molding material bites into the intricate uneven portion 251 and exerts a mechanically bonded anchor effect to form a desired resuscitation disc-shaped member 1 that is firmly integrated with the limestone main portion 2.
The configurations of the other through holes 21, the replenishment section 3, etc. are the same as those in the first embodiment, and the description thereof will be omitted. The same reference numerals as those in the first embodiment indicate the same or corresponding portions.

(1-3) Embodiment 3
The main resuscitation board-shaped member 1 includes a limestone main portion 2, a replenishment portion 3, and a connecting portion 4 as shown in FIG. 3 (c). FIG. 9 shows an image diagram of FIG. 3 (c).
The main limestone portion 2 is two limestone halves 2A and 2B in which the limestone main portion 2 of the first embodiment is divided and arranged with the groove 22 in between. The Ryukyu limestone made of natural stone has a large crack in addition to the through hole 21, and when it is made into a disc, the limestone main part 2 is divided there and divided into two limestone halves 2A and 2B, and the groove 22 There is a case that makes. In the groove 22 referred to in the present invention, there is no limestone groove bottom between the two limestone half-split portions 2A and 2B. The grooved wall 221 in which the half-split portions 2A and 2B form the groove 22 has a beautiful rock surface woven by nature. The resin connecting portion 4 fills the groove 22 with the cured portion R of the resin molding material, and connects and integrates the two limestone half-split portions 2A and 2B.

Like the replenishment part 3, the connecting part 4 is also transparent or translucent, and even if it becomes a resuscitation board-like member 1, the uneven grooved wall 221 can be visually recognized through the connecting part 4, and the natural expression created by the coral reef of Ryukyu limestone. Can be seen. In FIG. 9, the connecting portion 4 and the replenishing portion 3 are colored bluish and are in a translucent state.
The connecting portion 4 forms a surface-side flat surface 4a of the hardened portion R that matches the flat surface-side plate surface of the limestone half-split portions 2A and 2B at the surface-side groove opening of the groove 22. The back surface side groove mouth of the groove 22 also forms a back surface side flat surface 5b of the hardened portion R that matches the flat back surface side plate surface 2b of the limestone half-split portions 2A and 2B.

The joint portion 4 which fills the groove 22 formed by the half portion of the two limestone main portions 2 and is joined and integrated with the uneven grooved wall 221 does not only depend on the adhesiveness of the resin molding material. Although illustrated briefly in FIG. 3, it is desired that the hardened portion R of the resin molding material bites into the grooving wall 221 having severely intricate irregularities forming the groove 22 and exerts an anchor effect to be firmly integrated with the limestone main portion 2. It is a resuscitation board-like member 1.
The configurations of the other through holes 21, the replenishment section 3, etc. are the same as those of the first and second embodiments, and the description thereof will be omitted. The same reference numerals as those of the first and second embodiments indicate the same or corresponding parts.

(1-4) Embodiment 4
The main resuscitation board-shaped member 1 includes a plurality of limestone main portions 2 as shown in FIGS. 7 (b) and 7 (c), a replenishment portion 3, a connecting portion 4, and a joint portion 6.
A plurality of limestone main portions 2 of the first and third embodiments having a rectangular shape in a plan view are provided. Each limestone main portion 2 is arranged so that the flat surface side plate surface 2a is flush with each other with a gap ε. Here, a plurality of limestone main portions 2 are arranged so as to form a passage floor as shown in FIG. FIG. 10 is an explanatory image diagram of FIG.
The width of the gap ε is set to be substantially equal, and a joint portion 6 for filling the gap ε is provided as shown in FIG. 7. The joint portion 6 is composed of a hardened portion R of the same resin molding material as the replenishing portion 3, and is joined and integrated with the limestone main portion 2 that fills the gap ε and creates the gap ε.
The configurations of the other through holes 21, the replenishment section 3, the connecting section 4, etc. are the same as those in the first to third embodiments, and the description thereof will be omitted. The same reference numerals as those of the first to third embodiments indicate the same or corresponding portions.

(2) Method for Manufacturing Ryukyu Limestone Resuscitated Disc-shaped Member (2-1) Embodiment 1
The method for manufacturing the present resuscitation board-shaped member is one method for manufacturing the resuscitation board-shaped member shown in FIG. As shown in FIGS. 4 and 5, the limestone main portion 2 including the through hole 21 is immersed in a liquid resin molding material, and then the resin molding material is hardened to fill the through hole 21 and joined to the limestone main portion 2. The integrated transparent or translucent resin replenishment part 3 is molded.

Prior to production, a liquid resin molding material, a limestone main portion 2, and a concave mold 8 having an upper surface opening in which the limestone main portion 2 can be immersed in the resin molding material are prepared. The concave mold 8 is made of a wooden mold, slightly larger than the limestone main portion 2, and the limestone main portion 2 is placed sideways on the mold bottom 81 of the concave mold 8 as shown in FIGS. 4 (b) to (c). At this time, the vertical wall 82 is formed as a concave shape 8 which is higher than the upper surface of the limestone main portion 2. Although not shown, a watertight sheet in close contact is attached to the inner surface of the concave mold 8.
The resin molding material is a resin molding material that is liquid at room temperature and forms a transparent or translucent cured portion R. Here, a mixed solution E containing an unsaturated polyester resin as a main material, methyl ethyl ketone peroxide, and cobalt naphthenate is used. As described above, the limestone main portion 2 is made of Ryukyu limestone, and at least one surface on the surface 2a side is formed into a flat plate-like body, and an uneven hole wall is formed from the surface on the surface 2a side to the surface on the back surface 2b. The through hole 21 by 211 penetrates.

Using the limestone main portion 2 and the concave shape 8, the resuscitation board-shaped member 1 is manufactured as the limestone main portion 2 having a rectangular plate body as shown in FIG. 4 (b), for example, as follows.
First, as shown in FIG. 4 (a), the solution E of the resin molding material is injected until the entire bottom surface 81 of the concave mold 8 is immersed. Next, the limestone main portion 2 is erected on the concave mold 8, and the solution E of the resin molding material is applied to the back surface 2b of the limestone main portion 2 with a brush K or the like (b of FIG. 4). Reference numeral E1 indicates a solution film. This is to prevent residual air traces from appearing in the replenishment unit 3 and voids from forming in the through holes 21 when the product is commercialized.

Subsequently, the coated limestone main portion 2 is tilted down so that the back surface 2b side faces down in the concave mold 8 and placed on the concave bottom surface 81 (c in FIG. 4). The liquid level E0 of the resin molding material solution E rises due to the placement of the limestone main portion 2, but does not reach the surface 2a of the limestone main portion 2.
Then, the solution E of the resin molding material is injected until the surface 2a of the limestone main portion 2 in the concave mold 8 is crossed, and the limestone main portion 2 is submerged (d in FIG. 4). The main portion 2 of the limestone is immersed in the solution E of the resin molding material, and the inside of the through hole 21 and the inside of the recess 24 are filled with the solution E.

After that, it is left in the state of FIG. 4 (d) for a predetermined time (here, about 3 days) and cured at room temperature. Although not shown, the limestone main portion 2 is submerged in the resin molding material solution E, the upper surface opening of the concave mold 8 is covered with an upper lid, and the inside of the concave mold 8 sealed with the lid is depressurized. Then, the residual air in the through hole 21 or the like may be forcibly removed.

The state of FIG. 4 (d) is left for a predetermined time, the resin molding material is cured at room temperature, and after molding of the replenishment portion 3, the limestone is submerged in the solution E of the resin molding material and is surrounded by the cured portion R and integrated. Demold the main part 2 (a in FIG. 5).
In the state of FIG. 5A, the cavity 8 has a concave shape, and an unnecessary hardened portion R is fixed around the main portion 2 of the limestone.
Therefore, for example, as shown in FIG. 5 (b), the thin film layer R1 of the hardened portion R is left on the surface 2a of the limestone main portion, and the other unnecessary hardened portion R is scraped off, and the limestone main portion 2 and the resin are formed in the through hole 21. A resuscitation board-like member 1 in which the replenishment unit 3 is integrated is obtained. Although not shown, a thin film layer similar to the thin film layer R1 may be left on the back surface 2b of the main portion of the limestone.
Further, if the thin film layer R1 on the surface 2a of the limestone main portion is also scraped off, a desired Ryukyu limestone resuscitation disc-shaped member 1 in which the limestone main portion 2 and the resin replenishment portion 3 are integrated as shown in FIG. 1 can be obtained.

By the way, in FIG. 4 (c), if there is an uneven portion 251 having a rock surface as shown in FIG. 2 on the right end surface of the limestone main portion 2, the uneven portion 251 is hardened under the manufacturing method described above. A resuscitation disc-shaped member 1 is obtained, which is filled with R and has a resin replenishment plate portion 5 joined and integrated with the side end surface 25 of the limestone main portion 2. Other configurations are the same as in (1) Resuscitation disc-shaped member of Ryukyu limestone, and are omitted. The same reference numerals as in (1) indicate the same or corresponding parts.

(2-2) Embodiment 2
This embodiment is a method for manufacturing a resuscitator-shaped member shown in FIGS. 3 (c) and 9 (c). The concave shape 8 has a size in which two limestone half-split portions form a groove 22 to fit in, and when the limestone main portion 2 is placed sideways on the mold bottom 81 of the concave mold 8, the standing wall 82 is placed on the limestone main portion 2. Make it higher than the top surface.

First, on the bottom 81 of the concave mold 8, as shown in FIG. 3 (a), two limestone half-split portions 2A and 2B are placed facing each other with a groove 22 having a required width interposed therebetween. At this time, in order to secure the size of the resuscitation disc-shaped member 1 which is the final product, the positions of the two limestone half-split portions 2A and 2B on the mold bottom 81 are adjusted in the vertical and horizontal directions of the paper surface in FIG. do. The back surface of the limestone half-split portions 2A and 2B is previously coated with the solution E of the resin molding material in the same manner as in (2-1).

Next, the solution E of the resin molding material is injected until the surface 2a of the limestone half-split portions 2A and 2B in the concave mold 8 is exceeded, and the limestone main portion 2 is submerged (b of FIG. 3). By immersing the limestone main portion 2 in the solution E of the resin molding material, the inside of the through hole 21 and the inside of the recess 24 are filled with the solution E.
Then, the state of FIG. 3 (b) is left for a predetermined time, the resin molding material is cured at room temperature, and the molding of the resin joint portion 4 is completed (c) of FIG.

After that, it is submerged in the solution E of the resin molding material in the concave mold 8, the limestone half-split parts 2A and 2B surrounded by the hardened part R are demolded, and the unnecessary hardened part R is trimmed and removed. The product shown by the solid line in FIG. 3 (c) is used. At this time, the limestone half-split portions 2A and 2B are formed into a rectangular resuscitator-shaped member 1 by scraping off the portions protruding outward from the top, bottom, left, and right of the paper surface in FIG. 3 (a). A desired resuscitation board-like member 1 is obtained in which the transparent or translucent connecting portion 4 fills the groove 22 and is joined and integrated with the two limestone half-split portions 2A and 2B. Other configurations are the same as in (2-1), and the description thereof will be omitted.

(2-3) Embodiment 3
This embodiment is a method for manufacturing a resuscitator-shaped member as shown in FIG.
A plurality of rectangular limestone main portions 2 in a plan view are prepared, and a concave shape 8 is prepared in which the flat surface side plate surfaces 2a of the limestone main portions 2 can be arranged flush with each other with a gap ε (FIG. 6). When the limestone main portion 2 is placed horizontally on the mold bottom 81 of the concave shape 8 so as to accommodate all the limestone main portions 2, the standing wall 82 is set so as to be higher than the upper surface of the limestone main portion 2 (FIG. 4). See c).
First, as shown in FIG. 6, a plurality of limestone main portions 2 and limestone half-split portions 2A and 2B are arranged on the bottom 81 of the concave shape 8 with a gap ε secured, and the surface side plate surfaces 2a are flush with each other. It is set. Reference numeral 23 indicates a crack. The limestone main portion 2 and the limestone half-split portions 2A and 2B are coated with a solution E of the resin molding material on their back surfaces 2b in the same manner as in (2-1) prior to setting.

Next, the solution E of the resin molding material is injected until the surface 2a of each limestone main portion 2 and the limestone half-split portions 2A and 2B in the concave shape 8 is crossed, and the limestone main portion 2 is submerged in the solution E. (See D in Fig. 4). By immersing the limestone main portion 2 and the limestone half-split portions 2A and 2B in the solution E in the concave shape 8, the gap ε, the groove 22, the through hole 21, and the crack 23 are filled with the solution E.
The state is left for a predetermined time to cure the resin molding material at room temperature. After that, if the mold is removed, the joint portion 6 of the resin-made cured portion R that fills the gap ε is formed as shown in FIGS. 7 (b) and 7 (c). The hardened portion R is buried in the crack 23, and the hardened portion R is also buried in the groove 22, and the connecting portion 4 similar to (2-2) joins and integrates the two limestone half-split portions 2A and 2B. Then, the joint portion 6 provides a resuscitator-shaped member 1 as shown in FIG. 7 in which all of the plurality of limestone main portions 2 and the limestone half-split portions 2A and 2B are integrated. A resin-made hardened portion R surrounds the outer peripheral portion of the resuscitation disc-shaped member 1, and is appropriately scraped off to obtain a desired Ryukyu limestone resuscitation disc-shaped member 1. Other configurations are the same as in (2-2), and the description thereof will be omitted.

(3) Physical property test of the resuscitated disc-shaped member The strength and the like of the resuscitated disc-shaped member 1 obtained as described above were measured based on the JIS standard. The dry weight, volume, apparent specific gravity, water absorption weight, saturated water absorption rate, and compressive strength were examined for each of the 10 test pieces of the resuscitation disc-shaped member 1. The results are shown in Table 1. Table 2 shows the fracture strength and bending strength test results for each of the 10 test pieces in Table 1. In Tables 1 and 2, "Ryukyu limestone (resin)" is the resuscitated board-like member 1 of Ryukyu limestone in the present invention.
Next, in order to compare with the product of the present invention, the product of Ryukyu limestone alone was investigated. The results are shown in Tables 3 and 4. The resuscitation disc-shaped member 1 has strength comparable to that of the Ryukyu limestone alone product.

(4) Effect The resuscitated disc-shaped member of Ryukyu limestone constructed in this way and the manufacturing method thereof make use of the size of the disc-shaped body even if the through hole 21 is the limestone main part 2 appearing in the disc-shaped body. Can be a high-priced product. It is not necessary to treat it as a defective product for crushed stone or Sekichi stone as in the past. When the resin replenishment portion 3 for filling the through hole 21 is provided, the hole wall 211 of the through hole 21 is rich in variation and uneven, so that the hardened portion R of the replenishment portion 3 is effective for the uneven hole wall 211. It bites into the limestone main part 2 and is firmly integrated to secure the required strength.

In particular, in the present invention, since the limestone main portion 2 having one of the main configurations is violently embedded in the hole wall 211 of the through hole 21 on the uneven surface 211a due to the Ryukyu limestone, the liquid resin molding material is used as the hole wall. It flows into the recess of 211 and is hardened, and exhibits an anchoring effect that prevents the hardened portion R from coming off. Further, since the replenishing portion 3 having the other main configuration is made of a resin-made cured portion R, it also exhibits a zipper effect of entering the recess and elastically tightening. Each of the constituents of the limestone main portion 2 and the replenishment portion 3 effectively acts on the connection and integration of the two.
The compressive strength and the like can also be confirmed by "(3) Physical property test of the resuscitated board-shaped member" and can be used as a building member or the like. It is possible to revive a disc-shaped member with a through hole 21 that could not be used in the past, and to make a resuscitated disc-shaped member 1 of a high-priced product utilizing the size of the disc-shaped body. It leads to a significant increase in product yield as a disc-shaped member made by cutting large chunks of Ryukyu limestone, and greatly contributes to the effective utilization of precious Ryukyu limestone made over many years.

When the revival board-shaped member 1 is flattened and the surface-side flat surface 3a of the cured portion R that matches the surface-side board surface 2a is formed at the hole 210 of the through hole 21 that appears on the surface 2a side, the revival board-like member 1 is flattened. Since the surface 1a side of the shape member 1 is all flat, it looks good and can be applied as various building members and the like. If the back surface 2b on the opposite side of the front surface side plate surface 2a of the limestone main portion 2 is also formed on a flat plate surface and is formed in a rectangular shape in a plan view, the versatility is enhanced and the application is further expanded such as for the top plate of a table.

Further, even if the replenishment unit 3 is present, most of it is composed of high-grade Ryukyu limestone, so that the same high-class feeling as the Ryukyu limestone single product is maintained. In addition, if you look into the replenishment part 3, you can appreciate the natural beauty of Ryukyu limestone that appeared on the uneven hole wall 211 of the through hole 21 through the transparent or translucent hardened part R, and reinforce the strength and revive it as a product. It will not only make it possible, but will further increase the product value.

As in claim 3, when the groove 22 is filled with the hardened portion R and the connecting portion 4 is provided to join and integrate the two limestone half-split portions 2A and 2B, the limestone half-split portion 2A is divided into two. Since 2B are connected by the connecting portion 4, the half-split portions 2A and 2B can be revived as a connected resuscitated disc-shaped member 1.
Further, when cut into a disc-shaped body, the natural rock surface of Ryukyu limestone may appear on the side end face 25 of the disc-shaped body with an uneven portion 251. As in claim 4, it is joined to the side end face 25. When a resin replenishment plate portion 5 that is integrated and extends outward with a thickness t5 that matches the plate-like thickness t2 of the limestone main portion 2 is provided, a plate-like body with the uneven portion 251 left is formed. Can be commercialized.
Further, as in claim 7, a plurality of limestone main portions 2 are arranged so that their flat surface side plate surfaces 2a are flush with each other with a gap ε opened, and a joint portion 6 in which the hardened portion R fills the gap ε. Then, by joining and integrating with the limestone main part 2 that creates the gap ε, a larger integrated product can be made.

Further, when the replenishment board portion 5 and the connecting portion 4 are made transparent or translucent, similarly to the replenishing section 3, the uneven portion 251 created by the coral reef on the side end surface 25 through the replenishing board portion 5 and the connecting portion 4. You can see the beautiful natural expression of the grooved wall 221 and enhance the product value.
Furthermore, when the plate-shaped resuscitation board-shaped member 1 is assembled and processed and used as a stand for a vase or the like as shown in FIG. 11, the rock surface created by the coral reef is replenished with the high-class feeling of Ryukyu limestone. It can be visually recognized through the part 5 and the like, and the stand itself is also beautiful.

In addition, when the resin molding material is a resin molding material which is liquid at room temperature and contains a thermosetting resin as a main material, molding of the replenishment section 3 and the refill board section 5 becomes easy. When the resin molding material is a resin molding material containing an unsaturated polyester resin as a main material, the adhesiveness is excellent. Further strengthen the joint integration with the part 2. Moreover, unlike phenol resin and the like, it does not involve by-products during curing, so pressurization during molding is not required, and it can be cured at room temperature by selecting a main catalyst, accelerator, or the like. Molding of a large and heavy resuscitation board-like member as in the present invention becomes easy.
As described above, the resuscitated disc-shaped member of this Ryukyu limestone and the method for producing the same are extremely useful because they exhibit the various excellent effects described above.

In the present invention, the present invention is not limited to the one shown in the above embodiment, and various modifications can be made within the scope of the present invention according to the purpose and application. The shape, size, number, material, etc. of the resuscitation board-shaped member 1, limestone main part 2, through hole 21, groove 22, side end face 25, replenishment part 3, connecting part 4, replenishment board part 5, joint part 6, etc. It can be selected as appropriate according to the application.

1 Resuscitation board-shaped member (Ryukyu limestone resuscitation board-shaped member)
2 Limestone main part 2A, 2B Limestone half-split part 2a Surface (surface side plate surface)
2b Back side (back side board surface)
21 Through hole 210 Hole mouth (through hole)
211 Hole wall 22 Groove 25 Side end face 3 Replenishment part 3a Surface (flat surface on the surface side)
3b Back side (flat side on the back side)
4 Connecting part 5 Replenishing board part 6 Joint part 8 Concave type R Hardened part ε Gap

Claims (9)

It is made of Ryukyu limestone, and at least one surface on the front side is formed into a flat plate-like body, and from the surface on the front side to the surface on the back side, the main part of the limestone through which a through hole made by an uneven hole wall penetrates. ,
The hardened portion of the resin molding material, which fills the through hole and is joined and integrated with the limestone main portion, and which is aligned with the flat surface side plate surface at the hole opening of the through hole appearing on the surface side. A Ryukyu limestone resuscitation disc-like member comprising: a transparent or translucent resin replenishment portion on which a flat surface on the surface side is formed. The back surface of the limestone main portion opposite to the flat surface side plate surface is also formed on the flat plate surface and is formed in a rectangular shape in a plan view, and the resin molding material is liquid at room temperature using a thermosetting resin as the main material. The resuscitation board-shaped member of Ryukyu limestone according to claim 1, which is the resin molding material of the above. The main part of the limestone is two limestone halves that are divided and arranged with a groove in between, and the hardened part of the resin molding material fills the groove and joins and integrates with the two limestone halves. The groove mouth on the surface side of the groove is further provided with a transparent or translucent resin joint portion in which a flat surface on the surface side of the hardened portion is formed so as to match the flat surface side plate surface of the limestone half-split portion. The resuscitation disc-shaped member of Ryukyu limestone according to claim 1 or 2. On the side end surface of the disc-shaped body related to the main portion of the limestone, there is an uneven portion that is intricately exposed in the thickness direction and the width direction.
The uneven portion is filled with the hardened portion, joined and integrated with the side end surface of the limestone main portion, and has flat surfaces on the front surface side and the back surface side matched to the flat surface side and the back surface side, respectively. A transparent or translucent resin replenishment plate portion extends outward from the side end surface with a thickness matching the plate-like thickness of the limestone main portion, and the side peripheral end surface of the replenishment plate portion becomes smooth. The resuscitated disc-shaped member of Ryukyu limestone according to claim 2 or 3, which is formed. The resuscitation board-shaped member of Ryukyu limestone according to claim 4, wherein the replenishment board portion is joined and integrated with the limestone main portion to form a rectangular shape in a plan view. The resuscitation board-shaped member of Ryukyu limestone according to any one of claims 2 to 5, wherein the resin molding material is a resin molding material liquid at room temperature using an unsaturated polyester resin as a main material. A plurality of the limestone main portions having a rectangular shape in a plan view are provided, and the flat surface side plate surfaces thereof are arranged flush with each other with a gap, and the hardened portion serves as a joint portion to fill the gap, and the gap is formed. The resuscitation board-like member of Ryukyu limestone according to any one of 1 to 6, which is joined and integrated with the main portion of the limestone. It is made of Ryukyu limestone, and at least one surface on the front side is formed into a flat plate-like body, and from the surface on the front side to the surface on the back side, the main part of the limestone through which a through hole made by an uneven hole wall penetrates. A resin molding material that is liquid at room temperature to form a transparent or translucent hardened portion is applied to the back surface side, and then the limestone main portion is placed in the concave mold with the back surface side facing down, and the concave mold is placed. The through hole is filled with the resin molding material to be injected into the limestone main portion, and then the resin molding material is cured to join and integrate with the limestone main portion and fill the through hole. Ryukyu is characterized in that a resin replenishment portion made of a transparent or translucent cured portion having a surface-side flat surface matching the flat surface-side plate surface is formed at the surface-side hole opening of the through hole. A method for manufacturing a limestone resuscitation disc-shaped member. The resin molding material is a resin molding material that is liquid at room temperature using an unsaturated polyester resin as a main material, and the resin replenishment portion is molded by burying the resin molding material in the through holes and curing at room temperature. 8. The method for manufacturing a resuscitator-shaped member according to claim 8.

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