JP7239170B2 - origami plane - Google Patents

Description

The present invention relates to an origami airplane that can be produced by simply folding square origami without cutting or notching paper, gluing paper, or attaching adhesive tape.

Conventionally, the body is made through the center fold line that bisects the rectangular origami, and the left and right wings are made on the left and right of the center fold line. An origami airplane is disclosed in which the leading edges of the left and right wings are produced by folding (see, for example, Patent Document 1 (claims 1 and 7, paragraphs [0010] and [0017], FIGS. 1 to 8). .). In this origami airplane, two horizontal folding lines perpendicular to the central folding line form a folded portion so that the center of gravity is concentrated approximately at the front-rear center of the body. In addition, the center fold line forms the upper side of the body by mountain folds, and the tail section is formed by the mountain fold lines and the valley fold lines formed radially toward the rear. Then, a first valley fold line and a second mountain fold line are formed on the left and right sides of the center fold line. Alternatively, by fixing with a clip, the underside of the trunk is produced, and flaps are produced at the rear ends of the left and right wings. Further, the flaps are made by cutting the perforation lines at the rear ends of the left and right wings and folding the fold lines (mountain fold or valley fold).

In the origami airplane configured in this way, the front part of the body is made thin, the tip of the body is made cylindrical, and the wings are made into a swept wing shape, so that the appearance is sharp. In addition to securing the strength of the wing portion, the weight balance between the front and rear of the flying object is secured by the fold-fold portion, so that a structure and configuration close to the configuration of an actual airplane can be realized. As a result, air resistance is reduced and structural rigidity is ensured, and flight distance and flight time can be greatly improved compared to conventional origami airplanes. Furthermore, rigidity can be ensured by sandwiching or adhering the paper pattern to the inside of the body. In addition, if the lower part of the torso is attached with a clip, the whole can be put together without using adhesive, so it satisfies sufficient design conditions as an aircraft, and the part attached with the clip does not fly. It is suitable as a grasping portion for grasping the body.

JP-A-2003-159484

However, in the origami airplane shown in Patent Document 1, after folding left and right along the first folding line of the valley fold and the second folding line of the mountain fold made on the left and right of the central folding line, The lower part of the torso is made by stacking the left and right parts on top of each other and either bonding them with an adhesive or fixing them with a clip. In addition, tools such as scissors and knives for cutting off the rear ends of the right and left wings are required in order to make the flaps, and there is a problem that it is not possible to easily make an origami airplane.

It is an object of the present invention to make a rectangular origami paper without using materials or parts other than origami such as adhesives and clips, and without using tools such as scissors and knives, and making it possible to produce an elongated flat plate shape by simply folding a square origami paper. To provide an origami airplane which can be folded into a

A first aspect of the present invention is, as shown in FIGS. An origami airplane 10 comprising a fuselage 11 and a vertical stabilizer 13 provided at the center of the rear portion of the fuselage 11. The fuselage 11 is formed by folding a sheet of rectangular origami paper 14 in parallel with one side of the plane. By alternately repeating the mountain folds 11a and the valley folds 11b, the nose 12 is formed into a substantially bellows shape that can be folded into an elongated flat plate shape. The vertical stabilizer 13 is formed of a mountain-shaped portion formed by a central mountain-folded portion 11a among a plurality of mountain-folded portions 11a of the fuselage 11 and a pair of valley-folded portions 11b and 11b sandwiching the mountain-folded portion 11a. By folding the rear part in two stages, the central mountain fold 11a is inclined upward toward the rear, and the inclined ridge line 13a is formed so as to protrude upward from the plurality of mountain folds 11a. and

A second aspect of the present invention is an invention based on the first aspect, and further, as shown in FIGS. A plurality of triangular pyramid portions 11d inclined obliquely upward toward the rear are formed by splitting the rear end portion of the valley fold portion 11b excluding the pair of valley fold portions 11b, 11b sandwiching the valley fold portion 11b. and

A third aspect of the present invention is an invention based on the first or second aspect, and as shown in FIGS. A horizontal V-shaped portion 13b is formed in which the upper surface of the rear portion of the vertical stabilizer 13 has a substantially horizontal V-shape by folding the rear portion.

In the origami airplane according to the first aspect of the present invention, a sheet of square origami is folded multiple times parallel to one side of the folded paper, and a plurality of mountain folds and valley folds are alternately repeated to form a fuselage into an elongated flat plate shape. The nose is formed by folding and collecting the front end of the aircraft folded into a flat plate, and the central mountain fold of the plurality of mountain folds of the aircraft and this mountain fold Since the vertical tail is formed by folding the rear portion of the mountain-shaped portion formed by a pair of valley-folded portions sandwiching the vertical tail in two steps, there is no need to use materials or parts other than origami such as adhesives and clips. Also, an origami airplane can be made simply by folding a square origami without using tools such as scissors and knives. In addition, since the origami plane can be folded into an elongated flat plate shape, the origami plane can be compactly accommodated in a small space and can be prevented from being deformed unintentionally by accommodating it in a thin cylindrical pipe. Furthermore, the origami airplane can be quickly opened like a fan by the resilience of the origami paper from a state of being folded into a long, thin flat plate.

In the origami airplane according to the second aspect of the present invention, among the plurality of valley folds of the fuselage, the rear end portions of the valley folds excluding the pair of valley folds sandwiching the central mountain fold are split in the middle to fold backward. Since a plurality of triangular pyramids inclined obliquely upwards are formed, the resilience of the origami increases, and the rear end of the fuselage becomes easier to open. In addition, the plurality of triangular pyramids functions as an elevator, improving gliding performance.

In the origami airplane according to the third aspect of the present invention, the rear part of the mountain fold that forms the vertical stabilizer is folded in half to form a horizontal V-shaped part in which the upper surface of the rear part of the vertical stabilizer is in a substantially horizontal V shape. , the resilience of the origami increases, and the rear end of the fuselage becomes easier to open.

1 is a perspective view of an origami airplane according to an embodiment of the present invention; FIG. It is a plan view showing a state in which the origami airplane is folded. It is a plan view of the origami airplane. It is a bottom view of the origami airplane. It is a front view of the origami airplane. It is a rear view of the origami airplane. It is a side view of the origami airplane. It is a diagram showing the first to tenth procedures of how to make the origami airplane. It is a diagram showing the 11th procedure to the 22nd procedure of how to make the origami airplane. It is a diagram showing the 23rd procedure to the 30th procedure of how to make the origami airplane. FIG. 2 is an unfolded view of the origami airplane after being unfolded to form creases and fold lines.

Next, the form for implementing this invention is demonstrated based on drawing. As shown in FIG. 1, an origami airplane 10 includes a fuselage 11 that has a nose 12 at its front end and that extends radially from the nose 12 . A vertical stabilizer 13 is provided. The fuselage 11 folds a rectangular origami 14 (FIG. 8(1)) 15 times parallel to one side, and alternately repeats eight mountain folds 11a and seven valley folds 11b, It is formed in a substantially bellows shape that can be folded into an elongated flat plate (Figs. 1 to 4). Further, the nose 12 is formed by folding and gathering the front end portions of the fuselage 11 folded into a flat plate shape. Furthermore, the vertical stabilizer 13 has a central mountain fold 11a among the eight mountain folds 11a of the fuselage 11, and a rear portion of a mountain-shaped portion formed by a pair of valley folds 11b and 11b sandwiching the mountain fold 11a. It is formed by folding in two stages (FIGS. 1 to 3). The vertical tail 13 is formed such that the central mountain fold 11a is inclined upward toward the rear, and the inclined ridgeline 13a protrudes upward from the eight mountain folds 11a (FIGS. 1 and 5). ~ Figure 6). 1, 2 and 4 is the portion where the two-step split folding is performed, that is, the two-step split folding portion.

On the other hand, of the seven valley folds 11b of the body 11, the rear ends of the five valley folds 11b excluding the pair of valley folds 11b, 11b sandwiching the central mountain fold 11a are split in the middle, and the rear end of the valley fold 11b is folded in half. Six triangular pyramid portions 11d are formed that are inclined obliquely upward as they go toward (FIGS. 2, 3 and 6). Further, by splitting the rear portion of the mountain fold portion 11a that forms the vertical stabilizer 13, a horizontal V-shaped portion 13b in which the upper surface of the rear portion of the vertical stabilizer 13 has a substantially horizontal V-shape is formed (FIGS. 1 and 3). 2 and FIG. 6).

How to make the origami airplane 10 configured in this way will be described with reference to FIGS. 8 to 10. FIG. The development view of FIG. 11 shows fold lines and fold lines formed when the origami airplane 10 is produced. First, with the reverse side of a vertically long rectangular origami paper 14 facing up, the origami paper 14 is folded into upper and lower halves and then opened (FIG. 8(1)). As a result, the center line 14a is formed on the origami 14. As shown in FIG. The upper and lower edges of the origami 14 are folded along the center line (FIGS. 8(2) and 8(3)), and in this state, the upper and lower edges are aligned with the center line 14a (FIG. 8(3) ) and FIG. 8(4)), in this state, after the upper and lower edges are further folded along the center line 14a (FIGS. 8(4) and 8(5)), they are all opened (FIG. 8(6) ). As a result, 15 parallel folding lines 14b at equal intervals are formed on the origami.

Next, with the surface of the origami 14 facing upward, the origami 14 is folded in half, left and right, and opened with a crease a near the center line 14a. 8 (6)), the origami 14 is turned over (FIG. 8 (7)). As shown in FIG. 8(7), the turned origami ₁₄ is folded along the folding line 14b within the range of B ₁ . 8 (7) to 8 ( ₉ )), point A at the end of the center line 14a of the origami 14 is placed in the range of B ₂ as shown in FIG. 8 (9). By folding along the inner folding line 14b, it is opened with a crease _c2 within the range of _C2 (FIGS. 8(9), 8(10) and 9(11)).

Next, after folding the origami 14 along the center line 14a and overlapping the lower half of the origami 14 with the upper half (FIG. 9 (12)), fold it along the first folding line 14b from the bottom (FIG. 9 (13)). . In this state, as shown in FIG. 9(13), fold c ₁ and c ₂ (the crease overlapping c ₁ in FIG. 9 (13)) while rotating the point D to the upper left. Then, fold the fold line b into a mountain fold and fold the E portion (FIGS. 9(13) and 9(14)), then open the whole and turn it inside out (FIG. 9(15)). In this state, as shown in FIG. 9(15), the center line 14a is mountain-folded and the pair of fold lines 14b adjacent to the center line 14a are valley-folded, and the crease c is folded as shown by arrows F and F. A fold line b is inserted under the fold lines ₁ and c ₂ as shown by arrows G and G to divide the fold into two steps, and the fold lines H and H are valley-folded (FIG. 9 (16)). As a result, the vertical stabilizer 13 protrudes upward from the rear portion of the fuselage 11 . Further, the vertical stabilizer 13 is completed by folding the vertical stabilizer 13 at the position indicated by the dashed line in FIG. 9(16) (FIG. 9(17)).

Subsequently, in FIG. 9(17), both the front and back sides are folded along the first folding line 14b from the top (FIG. 9(18)), and in this state, point I, which is the rear end of the fuselage 11, is in the range of J. After folding along the inner folding line 14b, the sheet is opened to form a fold line d, and the fold line d is folded inward (Fig. 9 (19)). Next, in FIG. 9(19), after folding both the front and back along the first folding line 14b from the bottom (FIG. 9(20)), the front and back are folded along the first folding line 14b from the top. (21) in FIG. 9. In this state, point K, which is the rear end of the fuselage 11, is folded along the folding line within the range of L, and then opened to form a crease e. Fold inward (Fig. 9 (22)). Furthermore, in FIG. 9 (22), after folding both the front and back along the first folding line 14b from the bottom (FIG. 10 (23)), fold the front and back along the first folding line 14b from the top. Both are folded (FIG. 10 (24)), and in this state, the point M, which is the rear end of the airframe 11, is folded along the fold line within the range of N, and then opened to form a fold line f. Split and fold (Fig. 10 (25)). By these operations, six triangular pyramid portions 11 d are formed at the rear end portion of the body 11 . 9(18), 9(21) and 10(24), the lengths of the folds d, e, and f are , the long side is about 1.5s, where s is the short side (the interval between 15 parallel folding lines extending in the horizontal direction of the origami 14 in FIG. 11).

Subsequently, in FIG. 10 (25), after folding the front end of the airframe 11 backward by a predetermined distance (1.6s to 1.8s) to form a crease g, the airframe 11 is turned upside down (Fig. 10 (26)), open the inside (middle) of the front end of the fuselage 11, fold the front end inward and fold it on both sides (FIGS. 10 (27) to 10 (29)). Next, by folding the upper end of the folded front end inward, the front end of the fuselage 11 is put together to form the nose 12 at the front end of the fuselage 11. In this state, the fuselage 11 is turned upside down (Fig. 10). (30)). The origami airplane 10 is now completed.

The origami airplane 10 made in this manner does not use any materials or parts other than origami, such as adhesives or clips, nor tools such as scissors or knives. An origami airplane 10 can be made. In addition, since the origami airplane 10 can be folded into a thin flat plate (Fig. 2), it can be accommodated in a small space compactly by housing it in a thin cylindrical pipe. It can prevent deformation that does not occur. In addition, the origami airplane 10 can be quickly opened like a fan by the elastic force of the origami paper from the state of being folded into a thin flat plate. In this embodiment, six triangular pyramids 11d inclined obliquely upward are formed at the rear end of the fuselage 11, and a single horizontal V-shaped portion is formed at the rear end of the vertical stabilizer 13. The elastic force is increased, and the rear end portion of the body 11 can be opened more easily. Furthermore, the six triangular pyramid portions 11d function as elevators and can improve gliding performance.

In the above-described embodiment, the origami plane is made of rectangular origami, but the origami plane is not limited to a rectangle, and may be made of square origami as long as it is square. In the above-described embodiment, one rectangular origami paper is folded 15 times in parallel along one side, and eight mountain folds and seven valley folds are alternately repeated to form the fuselage into an elongated flat plate shape. Although it is formed in a foldable, substantially bellows-like shape and has six triangular pyramids that are inclined obliquely upward toward the rear, this number is merely an example, and the number is not limited to these.

10 origami airplane 11 fuselage 11a mountain fold 11b valley fold 11d triangular pyramid 12 nose 13 vertical tail 13a inclined ridgeline 13b horizontal V-shaped portion 14 origami

Claims (3)

An origami airplane comprising a fuselage having a nose at its front end and formed in a substantially fan-like shape radiating from the nose, and a vertical tail provided at the center of the rear of the fuselage,
The fuselage is formed into a substantially bellows shape that can be folded into an elongated flat plate shape by folding a square origami sheet multiple times in parallel along one side and alternately repeating a plurality of mountain folds and valley folds,
The nose is formed by folding and putting together the front end portion of the fuselage folded into a flat plate,
The vertical stabilizer is formed by folding the rear portion of the mountain-shaped portion formed by a central mountain-folded portion and a pair of valley-folded portions sandwiching the mountain-folded portion among the plurality of mountain-folded portions of the fuselage into a two-step split fold. An origami airplane, wherein the central mountain-folded portion is inclined obliquely upward toward the rear, and the inclined ridgeline is formed so as to protrude upward from the plurality of mountain-folded portions. By splitting the rear ends of the valley folds of the plurality of valley folds of the fuselage except for the pair of valley folds sandwiching the central mountain fold, a plurality of valley folds inclined upward toward the rear are formed. 2. The origami airplane according to claim 1, wherein a triangular pyramid is formed. 3. An origami airplane according to claim 1 or 2, wherein a horizontal V-shaped portion is formed in which the upper surface of the rear portion of the vertical stabilizer is substantially horizontal V-shaped by splitting the rear portion of the mountain-folded portion forming the vertical stabilizer.

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