Method of restoring rotary decorated pattern tool for reproducing rotary decorated pattern itself on jomon earthenware

Abstract

To reproduce the original rotary decorated pattern tool itself using the original rotary decorated pattern itself to create a mold, thereby reproducing rotary decorated patterns on earthenware since prior art technologies for manufacturing a similar pattern tool for performing a method for reproducing the rotary decorated pattern have been attempted with no method for reproducing the rotary decorated pattern tool itself made available.SOLUTION: The method performs: digitally inputting the shape of a negative decorated pattern acquired with a 3-dimension CT scanner or 3-dimension laser scanner; reversing the front and back of the acquired 3-dimension digital shape to form a positive pattern digital data mold or molding a negative pattern with clay, which hardens when it dries, to form a reversed positive pattern analog mold; and then wrapping the positive pattern digital data mold or the reversed positive pattern analog mold around a cylinder of the same diameter as the original pattern, which is determined from the same circle point. This is the original restoration of the original pattern.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for restoring and reproducing the tool on which the pattern was applied from the rotary applied pattern. [Background technology]

[0002] The actual stone tools used to apply cylinder seals from ancient Mesopotamia and other places have been excavated and discovered, and so their actual appearance is known; however, the Jomon (rope weave patterns) applied to Japanese Jomon pottery and tools for applying patterns such as embossed patterns are thought to have been made from organic materials such as plant fibers and wooden shafts, and there are no actual examples of such tools having been excavated or discovered to date.

[0003] For this reason, in the past, in order to reproduce an applied pattern, a method was used in which an application tool capable of expressing a similar pattern was imagined and created, and then the applied pattern was compared with the original pattern to infer the nature of the application tool itself.

[0004] The purpose of this invention is to reproduce the original pattern by using the original pattern itself as the prototype. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "Jomon on Prehistoric Pottery in Japan" by Kiyoo Yamauchi (1979) The Society of Prehistoric Archaeology [Non-Patent Document 2] "Special Lecture: An Introduction to Jomon Grammar" Jomon Pottery 3: Late Period, Makoto Sahara (1981), Kodansha, pp. 162-167, pp. 193-199 [Non-Patent Document 3] "The Original Designs and Patterns of Jomon Pottery" in "Complete Guide to Jomon Pottery" by Michihiro Kani (2008) Am Promotion, pp. 965-980 Summary of the Invention [Problem to be solved by the invention]

[0006] According to the conventional technology, it is possible to reproduce with a certain degree of accuracy a tool that reproduces a pattern similar to a rotated pattern by analogy, but it is not possible to reproduce the original tool that applied the pattern. Therefore, the objective of this invention is to reproduce the original tool itself by making a mold of the original pattern itself and using it. [Means for solving the problem]

[0007] As a means of solving this problem, an important method is to create a mold of the positive pattern from the negative pattern (the pattern structure applied with the positive pattern application tool) itself in order to more accurately restore the original positive pattern (the pattern structure of the application tool itself on which the original pattern was applied).

[0008] To achieve this, the first idea is to obtain digital negative surface shape data using a non-contact, precise shape measurement method such as a CT scanner or a 3D scanner (laser type or moire image type scanner), and then invert this to obtain a positive surface shape.

[0009] From the positive data acquired and inverted above, multiple points of the same rotation, which is one feature of the rotating pattern (points where the same feature of the pattern always appears each time the instrument rotates once), are identified, and the pattern of one turn is joined so that these points overlap. In this case, by measuring the distance between adjacent same rotation points = the rotation distance of one revolution of the instrument, the diameter of the instrument can be calculated by dividing this by pi.

[0010] As a result, by wrapping and combining the obtained positive surface shape data around the surface of cylindrical, rod-shaped, or axial shape data so that the corresponding circular points overlap, the three-dimensional shape of the positive application tool that generated the original negative pattern can be reproduced.

[0011] To obtain more accurate shape data of the negative mold, it must be considered that the measurement accuracy of the shape measurement device itself, such as a CT scanner or a 3D scanner, which obtains the 3D shape, is an issue.

[0012] The second idea is a contact method in which the original negative mold is filled with silicone resin or the like and then molded, making it possible to directly obtain a positive mold of the inverted pattern.

[0013] In this case, too, the diameter of the tool can be calculated by measuring the distance between the corresponding points. By wrapping the positive mold around the surface of a cylinder, rod, or shaft shape so that the corresponding points overlap to achieve the calculated diameter, the three-dimensional shape of the positive mold that created the original negative pattern can be reproduced. Effect of the Invention

[0014] The non-contact digital shape data acquisition method according to the first invention is particularly effective when the original negative mold (master) is made of a brittle or soft material that is easily deformed, destroyed, or damaged, as it avoids the risk of changing the current shape of the master.

[0015] By handling the acquired 3D data on a PC, it is possible to identify coincident points or measure the distance between coincident points, and obtain results accurately and quickly.

[0016] The 3D shape of the stationery reproduced on a PC can be directly outputted by a 3D printer, making it possible to reproduce the actual stationery. Once the data has been reproduced digitally, it is possible to mass-produce the original stationery with the same accuracy. However, it is necessary to take into consideration the measurement accuracy of the CT scanner or 3D scanner used to acquire and measure the shape data of the pattern, and the reproduction accuracy of the 3D printer used to process the data and output the stationery. In addition, depending on the type and properties of the output material when outputting with a 3D printer, it is also necessary to take into consideration that the material may deform due to pressure applied when the restored original is applied, including the expansion and contraction of the material due to drying and heat after output.

[0017] According to the second idea, at the stage of wrapping the obtained positive mold itself around the surface of a rod-shaped axis to reproduce the finished stationery, it is anticipated that deformation of the material may occur due to differences in the skill of the technician working on the project, such as the choice of material when obtaining the positive mold, the amount of pressure applied when wrapping it around the axis, and the consistency of the rotation points, and it may be necessary to take these into consideration.

[0018] For this reason, whether accurate restoration is possible or not is thought to depend on the skill of the technician working, the nature of the material used to make the mold, and the choice of tools and materials used in the work, and restoration using carefully selected materials by experienced technicians may be required. Based on these assumptions, it is thought necessary to select materials that are soft when obtaining a positive shape from an analog negative shape, but that harden after the mold is made and processed into a positive-type design tool, and that have the strength to not deform to the hardness of the target clay surface when designing.

[0019] The third idea is to capture the rotated inscription pattern in a two-dimensional image, then identify the synchronicity points from the inverted image, and use this inverted image as the surface, wrapping and pasting it so that the synchronicity points overlap and the diameter of the inscription tool calculated from the synchronicity points, thereby creating a simple simulation of the inscription tool that allows one to imagine the shape of the original inscription tool (the inscription tool in this case is just a reproduced image, and it is not possible to actually inscribe the inscription).

[0020] The reproduced pattern application tools and the reproduction of negative patterns made by rotating the tools are thought to be useful for museum exhibits, etc. Therefore, the methods and presentations of the positive pattern application tools reproduced by the invention explained so far, the negative patterns reproduced from them, and the original objects on which the actual patterns were applied are also important elements included in this patent. [Brief description of the drawings]

[0021] [Figure 1] The estimated origin and pattern of basic chevron-shaped patterns [Diagram 2]A positive pattern obtained by inverting the applied negative pattern [Diagram 3] Original pattern reproduced from a molded positive pattern [Figure 4] The mountain-shaped stamping pattern reproduced in the original reconstruction [Diagram 5] The estimated origin and pattern of basic oval-shaped patterns [Figure 6] A positive pattern obtained by inverting the applied negative pattern [Figure 7] Original pattern reproduced from a molded positive pattern [Figure 8] Oval stamped pattern reproduced in the original reconstruction [Figure 9] Basic Jomon patterns [Figure 10] A positive pattern obtained by inverting the applied negative pattern [Figure 11] Original pattern reproduced from a molded positive pattern [Figure 12] Jomon patterns reproduced in their original form [Figure 13] Examples of cylinder seals [Figure 14] Rotating patterns on cylinder seals [Figure 15] A positive pattern obtained by inverting the applied negative pattern [Figure 16] A cylinder seal reproduced from a molded positive pattern [Figure 17] Negative patterns reproduced on restored cylinder seals DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] A tool used to carve mountain-shaped patterns into a wooden rod or similar object is said to be the original source of mountain-shaped stamping patterns (referred to as 2: positive pattern). When this is pressed against a clay surface and rotated to apply a pattern, a zigzag pattern appears (referred to as 3: negative pattern). Each time the original object rotates once, there is a random point where the same characteristics of the pattern always appear. This is called the repeated point (1). If the distance between repeated points is t, then t / π=r (the diameter of the original object to be applied).

[0023] The surface shape of the negative pattern (3) is converted into 3D data using a 3D CT scanner or 3D laser scanner, and the inverted data becomes the inverted positive pattern of the Yamagata embossed pattern (4). Since the patterns on actual Jomon pottery are hard and do not deform, it is also possible to cast the analog inverted positive pattern (4) using clay, which hardens when it dries.

[0024] The inverted positive pattern of (4) is wrapped around a cylinder of diameter r determined from the same circular point (5). This becomes the restored original of the pattern applied in Figure 1. If (5) is three-dimensional data, printing it out with a three-dimensional printer will be the restored original as is. If a mold is made out of clay that hardens when it dries and then wrapped around it, that will be the restored original.

[0025] (5) is then rotated on the clay surface to create the reproduced mountain-shaped stamped pattern (6). The quality of the reproduction can be checked by whether the dots (1) are clearly visible.

[0026] A tool that carves a row of oval indentations into a wooden rod is said to be the original body for oval stamping (7) (a positive pattern). When this is pressed against a clay surface and rotated, a pattern of rows of ellipses appears (8). Each time the original body rotates once, a repeating point (1) appears.

[0027] The surface shape of the pattern (8) is converted into 3D data using a 3D CT scanner or 3D laser scanner, and the inverted data becomes the inverted positive pattern of the elliptical impression pattern (9). Since the patterns on actual Jomon pottery are hard and do not deform, it is also possible to cast the analog inverted positive pattern (9) using clay, which hardens when it dries.

[0028] The inverted positive pattern of (9) is wrapped around a cylinder of diameter r determined from the same circular point (10). This becomes the restored original of the pattern applied in Figure 5. If (10) is three-dimensional data, printing it out with a three-dimensional printer will be the restored original as is. If it is made by wrapping a mold out of clay that hardens when it dries, that will be the restored original.

[0029] (10) is then rotated on the clay surface to create the restored elliptical stamped pattern (11). The quality of the reproduction can be checked by whether the circular dots (1) are clearly visible.

[0030] The Jomon pattern (12) is said to have been created by rotating a rope-like tool (a negative pattern). On the surface of the pattern, a circular dot (1) appears every time the original rotates once.

[0031] The surface shape of the pattern (12) is converted into 3D data using a 3D CT scanner or 3D laser scanner, and the inverted data becomes the inverted positive Jomon pattern (13). Since the patterns on actual Jomon pottery are hard and do not deform, it is also possible to cast the analog inverted positive pattern (13) using clay, which hardens when it dries.

[0032] The inverted positive pattern of (13) is wrapped around a cylinder of diameter r determined from the same circular point (14). This becomes the restored original of the pattern in Figure 9. If (14) is 3D data, printing it out with a 3D printer will be the restored original as is. If it is made by wrapping a mold out of clay that hardens when it dries, that will also become the restored original.

[0033] (14) is then rotated on the clay surface to create the restored Jomon pattern (15). The quality of the reproduction can be confirmed by whether or not the same circular mark (1) is clearly visible.

[0034] The tool used to carve patterns into cylindrical stone materials is said to be the original model for engraving cylindrical seals (16) (a positive pattern). ( https: / / www.metmuseum.org / art / collection / search / 328757 / Cylinder Seal | Sumerian | Early Dynastic III | From the Metropolitan Museum of Art (metmuseum.org)

[0035] When (16) is pressed against a clay surface and rotated, a relief-like pattern (called a negative pattern) appears (17). Each time the base rotates once, the same circular point (1) appears.

[0036] The surface shape of the pattern (17) is converted into 3D data using a 3D CT scanner or 3D laser scanner, and the inverted data becomes the inverted positive pattern for the cylindrical impression (18). If the pattern itself is hard, such as a fired clay slab, the analog inverted positive pattern (18) can also be cast using clay that hardens when dried.

[0037] The negative pattern of (18) is wrapped around a cylinder of diameter r determined from the same circular point (18). This becomes the restored original of the pattern applied in Figure 14. If (18) is three-dimensional data, printing it out with a three-dimensional printer will be the restored original as is. If it is made by wrapping a mold out of clay that hardens when it dries, that will be the restored original.

[0038] (18) is then rotated again on the clay surface to create the restored cylindrical impression pattern (19). The quality of the reproduction can be checked by whether the circular dots (1) are clearly visible. [Industrial Applicability]

[0039] By displaying tools with designs on Jomon pottery at museum exhibitions, visitors will become more interested in and understand the designs. Until now, since there have been no cases where actual Jomon originals have been discovered, Jomon originals that have been restored from the designs have been displayed. By restoring the tools used in the designs on pottery using this method and displaying, providing, and selling them to visitors with explanations, the attention on pottery and patterns will increase, and those who are interested will be inspired to collect other types of patterns. According to statistics from the Agency for Cultural Affairs, there are more than 3,000 history museums nationwide, and they hold a huge number of related artifacts. In museum shops, goods related to the exhibits, as well as figures of pottery and clay figurines, are sold as products and have become popular. If a customer base is created that visits other museums to collect restored Jomon originals, and if the Jomon originals as goods become a hot topic, it will contribute to an increase in the number of visitors to related museums. [Explanation of symbols]

[0040] 1 tied score 2. Yamagata Oshikata Motif Original Style (Positive Design) 3. Yamagata embossed pattern (negative pattern) 4. Reverse Yamagata Oshigemon (Reverse Positive Pattern) 5. Reconstruction of original Yamagata-impression pattern (reverse positive pattern) 6. Reconstructed Yamagata Impression Pattern (Negative Pattern) 7. Elliptical stamped pattern (positive pattern) 8. Oval stamped pattern (negative pattern) 9. Inverted ellipse stamping pattern (inverted positive pattern) 10. Reconstruction of the original elliptical stamped pattern (inverted positive pattern) 11 Restoration of elliptical stamping pattern (negative pattern) 12 Jomon (negative pattern) 13. Inverted Jomon (inverted positive pattern) 14 Jomon reconstruction original (inverted positive pattern) 15. Reconstructed Jomon (negative pattern) 16 Cylinder impression (positive pattern) 17 Cylindrical impression pattern (negative pattern) 18 Inverted cylindrical impression pattern (inverted positive pattern) 19 Cylindrical impression restoration original (inverted positive pattern) 20. Reconstructed cylinder impression pattern (negative pattern)

Claims

1. Among the patterns applied to Jomon pottery, there are rope patterns (patterns known as Jomon or twisted thread patterns) that are applied by rotation using a design tool called a Jomon prototype (a design tool made by twisting or braiding strings or ropes), patterns (so-called embossed patterns) that are applied by rotation using a design tool called an embossed pattern prototype (a design tool made by carving notches or patterns into a cylindrical or rod-shaped tool), and patterns on cylinder seals representative of ancient Mesopotamia (relief-like patterns created by rolling a cylindrical stone material with a pattern engraved on its side into clay), and the like. This method uses a shaft, rod, or tube-shaped design tool to apply the pattern, which is pressed against a clay surface and rotated to apply the pattern (referred to as a negative pattern), as a prototype to reproduce the shape of the design tool itself (a design tool for positive patterns).

2. This relates to a method for reproducing the positive patterning tool itself for rotary patterning by processing a positive pattern that is an inverted version of digital three-dimensional data cast from a negative pattern, or a positive pattern that is cast in an analog manner using clay or the like, in order to realize claim 1.

3. By taking a two-dimensional image of the applied negative pattern, inverting it, and rolling it so that the positive side is facing out, it is possible to simulate the three-dimensional image of the application tool in a two-dimensional image. Although it is not possible to apply a pattern to an actual clay surface, the original object to be applied that is reproduced from a two-dimensional image is included in this patent as it relates to a method for estimating the original form of the original object.

4. It is related to the reproduction and display of negative designs that are applied by rotating the reproduced positive design tools and then applying them again.

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