JP7776568B2 - 3D structure - Google Patents

Description

The present invention relates to a three-dimensional structure, particularly a three-dimensional structure that forms a tuck.

In recent years, in the field of clothing, products that have been processed to create a voluminous silhouette have become popular. For this reason, products that emphasize the three-dimensional effect by processing the material fabric with tucks, pleats, etc. have been developed.
For example, Patent Document 1 aims to provide clothing that can present a three-dimensional silhouette with a sense of depth, and discloses that "in clothing with pleats, the pleats comprise a pleated portion in which a portion of the fabric covering the wearer is folded inward, and the pleated portion is formed by folding an upper piece of fabric 32 further inward, and the folded and overlapping pieces of fabric 32 are sewn together at a certain distance, with the outer surfaces of the sewn together pieces of fabric 32 facing each other and sewn together from their inner surfaces. The clothing is a skirt, and the pleats are provided at a position a certain distance below the top edge of the skirt."

Utility Model Registration No. 3225017

However, in Patent Document 1, the folded and overlapped fabrics need to be sewn together at a certain distance, which results in a fixed silhouette and a process for sewing the folded portions.
Therefore, the present invention aims to provide a three-dimensional tuck structure and a manufacturing method thereof that can achieve a three-dimensional effect with depth using only normal sewing, without requiring special processing such as pleating.

In order to solve the above problems, one of the representative three-dimensional structures of the present invention is
In a three-dimensional structure in which a first material made of a flexible sheet is sewn to a second material at a finish line, a downwardly extending convex portion is formed on the front side of the three-dimensional structure. The convex portion has a central depression at its peak near the finish line, forming a valley portion extending toward the finish line. The convex portions on both sides of the valley portion are inclined downward toward the finish line, and the height of the convex portions disappears at the finish line. The tips of the inclined convex portions are butted together at the finish line when sewn to the second material.

In order to solve the above problems, another representative three-dimensional structure of the present invention is:
(a) a first intersection point and a second intersection point on the finish line, which are equidistant from the center line, are butt-sewn together at a third intersection point on the finish line, which is on the center line and located above the first intersection point and the second intersection point;
(b) a valley portion is formed below the finish line on the center line, an inverted portion is formed below the valley portion, and a third surface peak line is formed below the inverted portion;
(c) A convex portion is formed by three mountain lines: a first mountain line on the surface extending from the first intersection to the inversion portion, a second mountain line on the surface extending from the second intersection to the inversion portion, and a third mountain line on the surface.

According to the present invention, a three-dimensional structure that can achieve a three-dimensional effect with depth can be provided using only ordinary sewing, without requiring special processing such as pleating.
Problems, configurations, and effects other than those described above will become apparent from the following description of the preferred embodiments of the invention.

FIG. 1 is a schematic diagram of the front side of the three-dimensional structure of the first embodiment. FIG. 2 is a photograph of the front side of the three-dimensional structure of the first embodiment realized using fabric. FIG. 3 is a development view of the three-dimensional structure of the first embodiment. FIG. 4 is a schematic diagram showing the back side of the three-dimensional structure of the first embodiment. FIG. 5 is a photograph of the back side of the three-dimensional structure of the first embodiment realized using fabric. FIG. 6 is a photograph of the back side when a part of an inverted triangular tuck portion is formed so as to overlap a part of an adjacent inverted triangular tuck portion. FIG. 7 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 8 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 9 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 10 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 11 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 12 is a diagram for explaining a method for creating a development view of a three-dimensional structure according to the first embodiment. FIG. 13 is a development view of the three-dimensional structure of the second embodiment. FIG. 14 is a development view of the three-dimensional structure of the third embodiment. FIG. 15 is a development view of the three-dimensional structure of the fourth embodiment. FIG. 16 is a development view of the three-dimensional structure of the fifth embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, in the description of the drawings, the same parts are designated by the same reference numerals.
When there are multiple components with the same or similar functions, they may be described using the same reference numeral with different subscripts. When there is no need to distinguish between these multiple components, the subscripts may be omitted.
Additionally, although terms such as "first,""second," and "third" may be used to describe various elements or components in this disclosure, it will be understood that these elements or components should not be limited by these terms. These terms are used only to distinguish one element or component from another. Thus, a first element or component discussed below could also be referred to as a second element or component without departing from the teachings of the inventive concept.

In addition, in this disclosure, the positive x-axis direction in the drawings is referred to as the right side, the negative x-axis direction is referred to as the left side, the positive y-axis direction is referred to as the upper side or upward, and the negative y-axis direction is referred to as the lower side or downward.
In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings.
The following description will be given assuming that cloth is used as the material for creating the three-dimensional structure. However, the first material constituting the three-dimensional structure of the present disclosure is a flexible sheet, and can be any material other than cloth that can be folded, such as paper, metal foil, film, knitted fabric, etc., and is not limited to cloth. The first material can be sewn to the second material at the finishing line. The second material is not particularly limited, and can be any material that can be sewn to the first material.
Furthermore, although a seam allowance is provided on the upper part of the first material in the description, the seam allowance is not an essential component.

First Embodiment
First, the three-dimensional structure of the first embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram of the three-dimensional structure of the first embodiment as seen from the front side. Figure 2 is a photograph of the front side of a three-dimensional structure of the first embodiment, which is realized using fabric and arranged in parallel. In Figure 2, a belt is sewn to the end (seam allowance) above the finish line. The belt is an example of the second material.
In a three-dimensional structure in which a first material made of a flexible sheet is sewn to a second material at the finish line 20, a convex portion 250 (a convex portion toward the front of the paper in FIG. 1 , i.e., toward the positive z-axis direction) is formed on the front side of the three-dimensional structure, extending downward (in the negative y-axis direction). The top of the convex portion 250, a third surface mountain line 240, is recessed in the center upward (in the positive y-axis direction) from a point close to the finish line 20 (reversal portion 220), forming a valley portion 210 extending toward the finish line. The convex portions on both sides of the valley portion 210 are inclined so that their peaks (first surface mountain line 230, second surface mountain line 231) become lower in height toward the finish line, and the height of the convex portions disappears at the finish line, and the tips of the two inclined mountain lines (first surface mountain line 230, second surface mountain line 231) are butted together at the finish line and sewn to the second material.

Such a three-dimensional structure can be expressed in other ways as follows:
a first material made of a flexible sheet is sewn to a second material at a finish line;
the first material has two mountain folds extending below the finish line, a valley fold sandwiched between them, and a convex portion formed by the two mountain folds and the valley fold sandwiched between them,
The convex portion can be expressed as a three-dimensional structure having a portion in which the height of the convex portion increases downward from the finish line.

(Expansion of the three-dimensional structure)
Next, a development view of the three-dimensional structure of the first embodiment will be described with reference to Fig. 3. Fig. 3 is a development view of the three-dimensional structure of the first embodiment, showing the material for creating the three-dimensional structure as seen from the front side. In the drawing, the solid lines indicate the edges of the material or the locations where the crest lines of mountain folds are expected, and the dotted lines indicate the locations where the valley lines of valley folds are expected to occur.
The mountain and valley lines of the present disclosure do not necessarily need to be heat-pressed or otherwise processed. According to the technology of the present disclosure, as long as predetermined locations on the finished lines are joined, the material itself can naturally form mountain and valley folds, resulting in rounded mountain and valley lines.

In FIG. 3 , center line 10 is the line that forms the center of the three-dimensional structure. Furthermore, when the material for creating the three-dimensional structure is fabric, finish line 20 is the line along which stitching is performed to form the three-dimensional structure. To form the three-dimensional structure, finish line 20 is positioned higher near center line 10 than the first intersection point B and second intersection point B' (described later) on the left and right. On center line 10, a first reference point C, a second reference point F, and a third intersection point A are defined, in order from bottom to top. On finish line 20, a first intersection point B, a first turn point G, a third intersection point A, a second turn point G', and a second intersection point B' are defined, from left to right. In the figure, the line extending downward from first intersection point B parallel to center line 10 is defined as first intersection perpendicular line 40, and the line extending downward from second intersection point B' parallel to center line 10 is defined as second intersection perpendicular line 50.
The edge 30 indicates the edge of the material, and the area between the edge 30 and the finish line 20 is a seam allowance, which is not necessarily required. (The method for drawing the development view of FIG. 3 will be described later.)

Referring again to Fig. 1, it will be explained how the developed view shown in Fig. 3 is formed as the three-dimensional structure shown in Fig. 1. Fig. 1 is a schematic diagram of the three-dimensional structure of the first embodiment as seen from the front side. The first intersection B shown in Fig. 1 is folded back at the first folding point G and joined to the third intersection A, and at the same time, the second intersection B' is also folded back at the second folding point G' and joined to the third intersection A, and the first intersection B and the second intersection B' are butted together and sewn together, thereby obtaining the three-dimensional structure shown in Fig. 1.
In this three-dimensional structure, a valley portion 210 is formed on the center line 10 below the finish line 20, and an inverted portion 220, whose shape inverts from the valley line to the mountain line, is formed below the valley portion 210. Therefore, a third surface mountain line 240 is formed below the inverted portion 220.
On both sides of the valley portion 210, a convex portion 250 is formed by three mountain lines: a first surface mountain line 230 extending from the first intersection B to the inversion portion 220, a second surface mountain line 231 extending from the second intersection B' to the inversion portion 220, and a third surface mountain line 240.

Next, referring again to Fig. 2, a case where the three-dimensional structure of the first embodiment is realized using fabric will be described. Fig. 2 is a photograph of the front side of the three-dimensional structure of the first embodiment realized using fabric. In Fig. 2, the seam portion of Fig. 3 is sewn with a belt.
In Fig. 2, three of the three-dimensional structures described with reference to Figs. 1 and 3 are formed in parallel, and each has three mountain lines forming a three-dimensional convex portion.
The first and second intersections B and B' on either side of the center line 10 are simply folded back and joined to a third intersection A located above the first and second intersections B and B', and a voluminous three-dimensional structure can be formed by the repulsion of the tucks without the need for heat pressing or other processes on the ridges and valleys. The ridges and valleys that make up the convex portions can each have a rounded, drape-like shape. On the surface side of the fabric material, two parallel ridges at the same angle rise downward from the finish line to form tucks, forming a voluminous, drape-like convex portion centered on the intersection of the ridges.

The three-dimensional structure consisting of the crests, valleys, and inverted portions in Figure 2 is not fixed by special processing such as sewing or pleating, and therefore its position and appearance may change depending on the flexibility of the material, pressure or friction from the front or back of the material, gravity acting on the material, and so on.
However, regardless of which material is used, it is basically possible to realize a three-dimensional structure using the three mountain lines (line segment BC, line segment B'C, and center line 10 below the first reference point C) shown in the unfolded view in Figure 3.

Next, the three-dimensional structure on the back side of the first embodiment will be described with reference to Fig. 4. Fig. 4 is a schematic diagram of the three-dimensional structure of the first embodiment as seen from the back side.
As shown in Figure 3, the material between the first intersection perpendicular line 40 and the second intersection perpendicular line 50 is cut in a state in which it protrudes upward (in the positive direction of the y-axis) from the outer finish line 20 on the left and right sides of each of the first intersection perpendicular line 40 and the second intersection perpendicular line 50. The protruding portions are folded into an inverted triangle shape with the bottom F of the valley portion close to the finish line 20 as the center, and an inverted triangular tuck portion 400 is formed on the back side of the three-dimensional structure. The upper edge of the inverted triangular tuck portion 400 is sewn to the belt (second material) at the finish line 20.
By folding the first intersection B shown in Figure 3 at the first folding point G and joining it to the third intersection A, and at the same time folding the second intersection B' at the second folding point G' and joining it to the third intersection A, the three-dimensional structure shown in Figure 4 can be obtained on the back side.
In other words, the three-dimensional structure of the present disclosure can be realized as a reversible three-dimensional structure created from a single development view.

Such a three-dimensional structure can be expressed as follows:
a first material made of a flexible sheet is sewn to a second material at a finish line;
The first material has an inverted triangular convex portion below the finish line,
A three-dimensional structure in which recesses are formed on both sides of the inverted triangular convex portion relative to the inverted triangular convex portion.

In this three-dimensional structure, the finish line 20 forms the upper edge of the inverted triangle, and a downwardly tapered inverted triangular tuck portion 400 is formed consisting of a first back surface ridge 410 and a second back surface ridge 420. The bottom end of the inverted triangular tuck portion 400 extends into the depth of the paper in Figure 4 below the second reference point and connects to the third front surface ridge 240.

Next, the back side of the three-dimensional structure of the first embodiment realized using fabric will be described with reference to Fig. 5. Fig. 5 is a photograph of the back side of a plurality of three-dimensional structures of the first embodiment realized using fabric and arranged in parallel. In Fig. 5, as in Fig. 3, the seam portion of Fig. 1 is sewn with a belt.
5, three three-dimensional structures described with reference to FIGS. 1 and 4 are formed in parallel, each having an inverted triangular tuck portion 400. A rounded back drape 500 is formed between adjacent inverted triangular tuck portions.

Note that a portion of the inverted triangular tuck portion 400 of an adjacent three-dimensional structure may be formed to overlap a portion of the adjacent inverted triangular tuck portion 400. Figure 6 is a photograph of the back side of a three-dimensional structure in which a portion of the inverted triangular tuck portion 400 is formed to overlap a portion of the adjacent inverted triangular tuck portion 400. By overlapping portions of the inverted triangular tuck portions 400 with each other, a more voluminous feel can be achieved, resulting in a unique tuck structure.
In addition, when parts of the inverted triangular tuck portions 400 are overlapped in this manner, this can be achieved by setting the distance between the adjacent first intersection perpendicular line 40 and second intersection perpendicular line 50 to be narrower than the distance GG' in Figure 13 of the second embodiment described below.

(How to draw a development diagram)
Next, a method for creating the development shown in FIG. 3 will be described with reference to FIGS.
(Step 1)
First, as shown in FIG. 7, a center line 10 that is the center of the three-dimensional structure is determined relative to a horizontal line segment 60.
Next, a first intersection B and a second intersection B' are determined at equal positions on the left and right of the center line on the finished line 20. The width from the center line 10 to the first intersection B and the width from the center line 10 to the second intersection B' determine the height of the convex portion 250 that constitutes the three-dimensional structure.
In the first embodiment, the horizontal line segment 60 overlaps with the finish line 20 to the left of the first intersection B and to the right of the second intersection B'. However, as will be described later with reference to Figure 16 as a fifth embodiment, the horizontal line segment 60 in the three-dimensional structure of the present disclosure does not necessarily need to overlap with the finish line 20. In the three-dimensional structure of the present disclosure, it is sufficient that the finish line 20 and the horizontal line segment 60 overlap at the first intersection B, the second intersection B', and the third intersection A.

(Step 2)
Next, as shown in Figure 8, an arbitrary diagonal line segment is drawn from the first intersection point B and the second intersection point B' downward on the horizontal line segment 60 with respect to the center line 10, and the intersection point with the center line 10 is defined as the first reference point C. Here, if the end of the first intersection perpendicular line 40 is defined as V and the end of the second intersection perpendicular line 50 is defined as W, then it is sufficient that ∠VBC and ∠WB'C are 90° or less. Figure 8 shows an example in which both are drawn at 30°.

(Step 3)
Next, as shown in Figure 9, if the left end of horizontal line segment 60 is defined as J and the right end as K, then with a line passing through points B and C (hereinafter also referred to as "line BC") as the axis of symmetry, lines EB and BD can be defined as symmetric lines of lines JB and BV, respectively.
Similarly, with the line B'C as the axis of symmetry, lines E'B' and B'D' can be defined as symmetric lines of the lines KB' and B'W, respectively.

(Step 4)
Next, as shown in Figure 9, the intersection of the straight lines BD and B'D' is defined as the second reference point F. Then, as shown in Figure 10, a line that bisects the angle between the center line 10 and the straight line BF is set, and the intersection with the straight line BE is defined as the first turning point G. Also, a line that bisects the angle between the center line 10 and the straight line B'F is set, and the intersection with the straight line B'E' is defined as the second turning point G'.

(Step 5)
11, a symmetry line GA of the line segment BG is determined using the line FG as the axis of symmetry, and a symmetry line G'A of the line segment B'G' is similarly determined using the line FG' as the axis of symmetry. This allows the third intersection point A to be determined.

(Step 6)
As shown in FIG. 12, a basic development diagram for forming the three-dimensional structure of the present disclosure can be completed.
12, a first intersection B and a second intersection B' are defined equidistant from the center line on both sides of a horizontal line perpendicular to the center line that is the center of the tuck. Then, when the first intersection B and the second intersection B' are folded back to a third intersection A that is located on the center line 10 and above the first intersection B and the second intersection B', and then butt-sewn together, the three-dimensional structure of the first embodiment can be obtained.
12, the line segment connecting the line segments JB, BG, GG', G'B', and B'K forms the finish line 20. If necessary, a seam allowance can be provided above the finish line 20 to define the end.

(Another method for determining the third intersection point A)
In the development shown in Figure 12, triangles AGF and BGF are congruent because they overlap with line segment GF as the valley line. Also, since center line 10, first intersection perpendicular 40, and second intersection perpendicular 50 are parallel, line segments FG and CB are parallel, and triangle BFC forms an isosceles triangle with line segment BC as its base.

Therefore, once a first intersection point B and a second intersection point B' are determined equidistant from the center line on the center line 10 and the horizontal line segment perpendicular to it (finish line 20 in Figure 12), and a first reference point C is determined on the center line 10, a second reference point F can be determined on the center line 10 so that the first reference point C, the first intersection point B, and the second reference point F form an isosceles triangle with the first intersection point B and the first reference point C as its base. A third intersection point A can then be determined on the center line 10 above the second reference point F, the same distance as the distance between the first reference point C and the second reference point F.

Second Embodiment
Next, a second embodiment will be described with reference to FIG.
In the second embodiment, a plurality of the three-dimensional structures described in the first embodiment are arranged in parallel.
13 is a development view of the three-dimensional structure of the second embodiment. In the following description, components that are the same as or equivalent to those in the first embodiment described above are denoted by the same reference numerals, and their description will be simplified or omitted.
In the second embodiment, three unfolded views for forming a three-dimensional structure are created in parallel as shown in Figure 13, and by folding back and joining the first intersection B and second intersection B' of each to the third intersection A, a three-dimensional structure such as that shown in Figure 2 can be created.
Furthermore, on the back side of the three-dimensional structure formed in this manner, a three-dimensional structure can be created in which an inverted triangular tuck portion 400 is formed by a first back surface mountain line 410 and a second back surface mountain line 420, as shown in Figures 5 and 6.
Furthermore, as shown in FIGS. 5 and 6, a rounded rear drape 500 is formed between adjacent inverted triangular tuck portions 400 .
There is no restriction on the number of 3D structures to be arranged in parallel, and any number of 3D structures can be arranged in parallel.

Third Embodiment
Next, a third embodiment will be described with reference to Fig. 14. In the following description, components that are the same as or equivalent to those in the first embodiment described above will be denoted by the same reference numerals, and their description will be simplified or omitted.
The third embodiment differs from the first and second embodiments in that, when the end of the first intersection perpendicular 40 is V and the end of the second intersection perpendicular 50 is W, ∠VBC and ∠WB'C are both drawn at 45°. By adjusting the angles of ∠VBC and ∠WB'C, it is possible to adjust the degree to which the pleats of the three-dimensional structure rise.

<Fourth embodiment>
Next, a fourth embodiment will be described with reference to Fig. 15. In the following description, components that are the same as or equivalent to those in the first embodiment described above will be denoted by the same reference numerals, and their description will be simplified or omitted.
The fourth embodiment differs from the first to third embodiments in that the finish line 20 and the end portion 30 are generally arc-shaped.
By making the finish line 20 arc-shaped and arranging the three-dimensional structures radially, a gorgeous and voluminous shape can be realized as a decorative ornamental part.
In addition, when the center line 10, the first intersection perpendicular 40, and the second intersection perpendicular 50 are not parallel to each other, as in the fourth embodiment, the method shown in steps 1 to 6 in the first embodiment is used to determine the third intersection A.

Fifth Embodiment
Next, a fifth embodiment will be described with reference to Fig. 16. In the following description, components that are the same as or equivalent to those in the first embodiment described above will be denoted by the same reference numerals, and their description will be simplified or omitted.
The fifth embodiment differs from the first to third embodiments in that the finish line 20 and the end portion 30 are not generally perpendicular to the center line 10 but are arranged at an angle.
15, in the fifth embodiment, the finish line 20 and the end portion 30 are arranged diagonally and not generally perpendicular to the center line 10. In this case, first, the first reference point C, the first intersection point B, the second intersection point B', the second reference point F, the first turn point G, and the second turn point G' are determined using the same procedures as steps 1 to 6 in the first embodiment.

Next, a first diagonal turn point H and a second diagonal turn point H' are determined to replace the first turn point G and the second turn point G' according to the shape of the finish line 20. If the finish line 20 slopes upward to the right, it is set to pass from the first intersection B through the third intersection point A, and the intersection of this finish line 20 with line segment FG is set as the first diagonal turn point H. The intersection of the extension of line segment FG' with the finish line 20 is set as the second turn point H'. The finish line 20 slopes downward to the right from the second turn point H' to the second intersection point B', and then slopes upward to the right again to the right of the second intersection point B'. This allows the three-dimensional structure of the present disclosure to be formed even if the finish line 20 is not perpendicular to the center line 10.

It is also possible to create a development in the same way when the finish line 20 slopes downward to the right as a whole. In this case, the fabric is cut at the finish line 20 or at the end 30, and the first intersection B and the second intersection B' are folded back to the third intersection A and joined, thereby forming a three-dimensional structure along the diagonal finish line 20.
It is of course possible to form a plurality of such three-dimensional structures along the oblique finish line 20.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention.
The present disclosure includes the following aspects.

(Aspect 1)
A three-dimensional structure in which a first material made of a flexible sheet is sewn to a second material at a finish line, wherein a convex portion extending downward is formed on the front side of the three-dimensional structure, and the convex portion has a concave central portion at the top close to the finish line to form a valley portion extending in the direction of the finish line, and the convex portions on both sides of the valley portion are inclined so as to become lower toward the finish line, so that the height of the convex portion becomes zero at the finish line, and the tips of the inclined convex portions are butted together at the finish line when sewn to the second material.

(Aspect 2)
The three-dimensional structure according to aspect 1, characterized in that the material at the valley portion is cut in a state where it protrudes above the finish line, and an inverted triangular tuck portion is formed on the back side of the three-dimensional structure by folding the protruding portion into an inverted triangle shape centered on the bottom of the valley portion closest to the finish line, and the upper edge of the inverted triangular tuck portion is sewn to the second material at the finish line.

(Aspect 3)
A first intersection point and a second intersection point, which are on the finish line and are equidistant from the center line, are butt-sewn together at a third intersection point on the finish line, which is on the center line and located above the first intersection point and the second intersection point,
A valley portion is formed below the finish line on the center line, an inverted portion is formed below the valley portion, and a surface third peak line is formed below the inverted portion,
A three-dimensional structure in which a convex portion is formed by three mountain lines: a first mountain line on the surface extending from the first intersection to the inversion portion, a second mountain line on the surface extending from the second intersection to the inversion portion, and a third mountain line on the surface.

(Aspect 4)
A three-dimensional structure according to aspect 3, wherein the convex portion formed by the third surface mountain line has a rounded drape shape.

(Aspect 5)
A first intersection point and a second intersection point are defined on both sides of a horizontal line segment perpendicular to the center line that is the center of the tack, and are equidistant from the center line;
A three-dimensional structure in which the first intersection and the second intersection are butt-stitched together at a third intersection on the center line and on a finish line located above the first intersection and the second intersection.

(Aspect 6)
In the conformation according to aspect 3 or 5,
A three-dimensional structure characterized in that the center line intersects the finish line obliquely.

(Aspect 7)
In the conformation according to aspect 3 or 5,
A three-dimensional structure characterized in that the finish line is arc-shaped.

(Aspect 8)
The tuck is folded back so that a first intersection point and a second intersection point, which are determined at positions on the finish line on both sides of the center line that is the center of the tuck, overlap the center line,
a third intersection point is defined on the center line and located above the first intersection point and the second intersection point;
a first turning point is formed on the finish line midway between the first intersection point and the third intersection point, and a second turning point is formed on the finish line midway between the second intersection point and the third intersection point;
A three-dimensional structure in which an inverted triangular tuck portion is formed by the finish line, a first backside mountain line extending from the first folding point toward the center line, and a second backside mountain line extending from the second folding point toward the center line.

(Aspect 9)
A plurality of the three-dimensional structures according to aspect 8 are formed on one finished line,
The three-dimensional structure is characterized in that the lower ends of the inverted triangular tuck portions are recessed into the back, and a rounded drape is formed between adjacent inverted triangular tuck portions.

(Aspect 10)
A plurality of the three-dimensional structures according to aspect 8 or 9 are formed on one finished line,
A three-dimensional structure characterized in that a portion of the inverted triangular tuck portion of an adjacent three-dimensional structure is formed so as to overlap a portion of an adjacent inverted triangular tuck portion.

(Aspect 11)
In the three-dimensional structure according to any one of aspects 3 to 10,
a first reference point is defined on the center line and located below the first intersection point and the second intersection point;
a second reference point is determined on the center line so that the first reference point, the first intersection point, and the second reference point form an isosceles triangle with the first intersection point and the first reference point as a base;
A three-dimensional structure characterized in that a third intersection point is defined as a position on the center line above the second reference point by the same distance as the distance between the first reference point and the second reference point.

(Aspect 12)
11. The three-dimensional structure according to any one of aspects 3 to 10, wherein the third intersection point is determined by the following steps 1 to 5:
(Step 1) A center line that is the center of the three-dimensional structure is determined for a horizontal line segment, and a first intersection point B and a second intersection point B' are determined at equal positions on the left and right of the center line on the finished line.
(Step 2) Diagonal line segments are defined from the first intersection point B and the second intersection point B' to the center line 10 below the horizontal line segment, and the intersection point with the center line is defined as the first reference point C.
(Step 3)
Let the left end of the horizontal line segment be J and the right end be K, and with a straight line passing through points B and C (hereinafter also referred to as "line BC") as the axis of symmetry, define lines EB and BD as the symmetric lines of lines JB and BV, respectively.
Similarly, with the line B'C as the axis of symmetry, lines E'B' and B'D' are defined as symmetric lines of the lines KB' and B'W, respectively.
(Step 4)
The intersection of the straight lines BD and B'D' is defined as the second reference point F. Then, a line that bisects the angle between the center line and the straight line BF is set, and the intersection with the straight line BE is defined as the first turning point G. Then, a line that bisects the angle between the center line and the straight line B'F is set, and the intersection with the straight line B'E' is defined as the second turning point G'.
(Step 5)
A symmetric line GA of the line segment BG is determined using the line FG as the axis of symmetry, and a symmetric line G'A of the line segment B'G' is determined using the line FG' as the axis of symmetry.

10: Center line 20: Finished line 30: End 40: First intersection perpendicular 50: Second intersection perpendicular 210: Valley portion 220: Inverted portion 230: First surface mountain line 231: Second surface mountain line 240: Third surface mountain line 250: Convex portion 400: Inverted triangular tuck portion A: Third intersection B: First intersection B': Second intersection C: First reference point F: Second reference point G: First turn point G': Second turn point H: Diagonal first turn point H': Diagonal second turn point

Claims (12)

A three-dimensional structure in which a first material made of a flexible sheet is sewn to a second material at a finish line, wherein a downwardly extending convex portion is formed on the front side of the three-dimensional structure, and the central portion of the peak of the convex portion near the finish line is concave to form a valley portion extending in the direction of the finish line, and the convex portions on both sides of the valley portion are inclined so as to decrease in height toward the finish line, and the height of the convex portion disappears at the finish line, and the tips of both inclined convex portions are butted together at the finish line when sewn to the second material. The three-dimensional structure according to claim 1, characterized in that the material at the valley portion is cut in a state in which it protrudes above the finish line, and an inverted triangular tuck portion is formed on the back side of the three-dimensional structure by folding the protruding portion into an inverted triangle shape centered on the bottom of the valley portion closest to the finish line, and the upper edge of the inverted triangular tuck portion is sewn to the second material at the finish line. In the three-dimensional structure according to claim 1 ,
A first intersection point and a second intersection point, which are on the finish line and are equidistant from the center line, are butt-sewn together at a third intersection point on the finish line, which is on the center line and located above the first intersection point and the second intersection point,
On the center line, the valley portion is formed below the finish line, an inverted portion is formed below the valley portion, and a surface third peak line is formed below the inverted portion,
A three-dimensional structure in which the convex portion is formed by three mountain lines: a first mountain line on the surface extending from the first intersection to the inversion portion, a second mountain line on the surface extending from the second intersection to the inversion portion, and a third mountain line on the surface. The three-dimensional structure described in claim 3, wherein the convex portion formed by the third surface peak line has a rounded, drape-like shape. In the three-dimensional structure according to claim 1 ,
A first intersection point and a second intersection point are defined on both sides of a horizontal line segment perpendicular to the center line that is the center of the tack, and are equidistant from the center line;
A three-dimensional structure in which the first intersection and the second intersection are butt-stitched together at a third intersection on the center line and on a finish line located above the first intersection and the second intersection. In the three-dimensional structure according to claim 3,
A three-dimensional structure characterized in that the center line intersects the finish line obliquely. In the three-dimensional structure according to claim 3,
A three-dimensional structure characterized in that the finish line is arc-shaped. In the three-dimensional structure according to claim 1 ,
The tuck is folded back so that a first intersection point and a second intersection point, which are determined at positions on the finish line on both sides of the center line that is the center of the tuck, overlap the center line,
a third intersection point is defined on the center line and located above the first intersection point and the second intersection point;
a first turning point is formed on the finish line midway between the first intersection point and the third intersection point, and a second turning point is formed on the finish line midway between the second intersection point and the third intersection point;
A three-dimensional structure in which an inverted triangular tuck portion is formed by the finish line, a first backside mountain line extending from the first folding point toward the center line, and a second backside mountain line extending from the second folding point toward the center line. A plurality of the three-dimensional structures according to claim 8 are formed on one finishing line,
The three-dimensional structure is characterized in that the lower ends of the inverted triangular tuck portions are recessed into the back, and a rounded drape is formed between adjacent inverted triangular tuck portions. A plurality of the three-dimensional structures according to claim 9 are formed on one finishing line,
A three-dimensional structure characterized in that a portion of the inverted triangular tuck portion of an adjacent three-dimensional structure is formed so as to overlap a portion of an adjacent inverted triangular tuck portion. The three-dimensional structure according to any one of claims 3 to 10,
a first reference point is defined on the center line and located below the first intersection point and the second intersection point;
a second reference point is determined on the center line so that the first reference point, the first intersection point, and the second reference point form an isosceles triangle with the first intersection point and the first reference point as a base;
A three-dimensional structure characterized in that a third intersection point is defined as a position on the center line above the second reference point by the same distance as the distance between the first reference point and the second reference point. 11. The three-dimensional structure according to claim 3, wherein the third intersection point is determined by the following steps 1 to 5:
(Step 1) A center line that is the center of the three-dimensional structure is determined for a horizontal line segment, and a first intersection point B and a second intersection point B' are determined at equal positions on the left and right of the center line on the finished line.
(Step 2) Diagonal line segments are defined from the first intersection point B and the second intersection point B' to the center line 10 below the horizontal line segment, and the intersection point with the center line is defined as the first reference point C.
(Step 3)
Let the left end of the horizontal line segment be J and the right end be K, and with a straight line passing through points B and C (hereinafter also referred to as "line BC") as the axis of symmetry, define lines EB and BD as the symmetric lines of lines JB and BV, respectively.
Similarly, with the line B'C as the axis of symmetry, lines E'B' and B'D' are defined as symmetric lines of the lines KB' and B'W, respectively.
(Step 4)
The intersection of the straight lines BD and B'D' is defined as the second reference point F. Then, a line that bisects the angle between the center line and the straight line BF is set, and the intersection with the straight line BE is defined as the first turning point G. Then, a line that bisects the angle between the center line and the straight line B'F is set, and the intersection with the straight line B'E' is defined as the second turning point G'.
(Step 5)
A symmetric line GA of the line segment BG is determined using the line FG as the axis of symmetry, and a symmetric line G'A of the line segment B'G' is determined using the line FG' as the axis of symmetry.