JP2012116566A - Folding box structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding box structure easy in folding operation.SOLUTION: One segment having some miura-ori (R) modules composed of parallelogram sheets 1 and hinges 2 connected to each other in one row in a longitudinal direction and other segments corresponding to portions under their sliding mirror images are faced back to back from each other, and connected at their side edges to each other to make a basic main structure composed of the folding box structure.

Description

The present invention relates to a folding box structure. More specifically, firstly, the folding operation is simple and the folded state is compact, and secondly, it relates to a folding box structure having an appropriate rigidity when unfolded.

Folding box structures are used in all fields. A variety of forms and structures are known, ranging from temporary construction to large, from small packages to commodity packages and daily necessities. Therefore, it seems that it is impossible to find a new folding box structure.

However, with the help of recent origami mathematics advances, it is quite possible to find a new and versatile folding box structure.

An object of the present invention is to provide a folding box structure that is a long box folding box structure that is compactly folded in the longitudinal direction, is easy to fold, has moderate rigidity when deployed, and is easy to manufacture. It is to be.

The present invention (refer to the explanatory diagram of FIG. 1), as shown in claim 1, in the XY coordinate system, has two bases on two parallel lines in the X-axis direction, equal to the inner angle θ, Two parallelograms adjacent to each other that share the hypotenuse are p and q, and one base of p and q is a mirror m to form two parallelograms r and s, respectively. A module M composed of quadrilaterals p, q, r, and s is configured, and at least one module M is translated without gaps in the Y-axis direction to form a module group A, and the module group A in the Y-axis direction is formed. Sliding reflection about the sliding mirror g is a module group B, the module group A and the module group B are assumed to be a virtual two-dimensional body, their back surfaces are combined, and the corresponding side edges e are combined to form a parallelogram. A box shape (C) is formed with a side as a ridge, and the box The above-mentioned problem is solved by a folding box structure in which the shape (C) has a solid box structure with a parallelogram surface as a sheet and a ridge as a hinge and a closed structure at the end of the box structure. It is.

The translation, mirroring, and sliding mirroring are operations used for the symmetry transformation group. The module M formed of four parallelograms is a basic element of a development structure called Miura folding.

Further, according to a second aspect of the present invention, in the first aspect, a restraining member is attached as a mechanism for restraining the degree of freedom, and the above-mentioned problem is solved.

Further, according to the present invention, as described in claim 3, the above-mentioned problem is solved by adding a closing structure that also serves as a restraint of the degree of freedom of expansion to the box-shaped end portion.

Moreover, this invention solves the said subject by the method of manufacturing the basic | foundation part of a folding box structure by a simple process, as shown in Claim 4,5.

The effects of the present invention can be summarized into the following four categories. Details thereof will be described later with reference to examples.

The first effect of the present invention lies in its unique folding characteristics. This is particularly noticeable for long cylindrical boxes. In general, a long cylindrical box has the property that its length remains when folded. In other words, the maximum dimensions are not reduced by folding. The box structure of the present invention is folded in the longitudinal direction so as to collapse by releasing the constraint. Therefore, what was folded is compact and the maximum dimension can be made small.

The second effect of the present invention is its moderate rigidity. Ideally, the folded structure should have little resistance in the folding process. However, once deployed, it must have the necessary rigidity by some restraining mechanism. In general, in a long cylindrical box structure, it is difficult to give sufficient restraint to an intermediate part, but in the folding box structure of the present invention, this is not the case. There are two reasons for this. One is a reinforcing effect by folds, and the other is by a mechanism by which a deployment element called a so-called Miura fold is incorporated. Details thereof will be described in the first embodiment.

The third effect of the present invention is that the manufacturing method does not include a special process and can be manufactured using existing general equipment.

The fourth effect of the present invention can be used for a folding box structure with a relatively soft sheet. In general, the mouth of a bag is aligned. In the structure of the present invention, when folded, the mouth of the bag is partially opened (FIG. 2 (b)). Therefore, it is easy to pinch that part. Then, by pulling, since this is a deployment structure, the process of automatically starting and opening is performed.

As a first embodiment, a folding box structure with a lid will be described. 3A and 3B show components of the folding box structure. The basis is materialized based on the geometric shape in the explanatory diagrams of FIGS. For simplicity, the symbols used in the explanatory diagrams are used even in the case of an entity. 3A and 3B show the modular groups A and B with the lid 3 and the glue margin 4, respectively. The shape parameters are the shape and size of the basic parallelogram, and the number of repetitions thereof, and various forms can be realized by these numerical values.

FIGS. 4A and 4B are perspective views of the folding box structure at the time of extension and folding, respectively. In the present specification, the thickness of the sheet is omitted in the drawing. Note that FIG. 4B is a perspective view when folded, and is not a plan view. In the figure, C is a folding box structure, and 3 is a lid that also serves as a restraining mechanism of the degree of freedom.

From the above, regarding the manufacturing method, it is clear that the feature of the folding box structure of the present invention is that two main elements are combined, and the processing can be performed in a flat state. It takes advantage of the nature of this structure with bipolar planar folding. Therefore, the folding box structure of the present invention can be manufactured with general equipment. This is the third effect of the present invention.

As shown in FIG. 4, the folded polyhedral box is folded flat in the vertical direction. It is substantially flat. The force required for folding depends on the folds and hinges, but it is almost perfect. The situation cannot be predicted from the outer shape. These facts demonstrate the first effect.

FIG. 5 shows a comparison between the folding box structure (a) of the present invention and an ordinary rectangular prism box structure (b) having substantially the same external shape. At this time, it is assumed that the end portion is restrained. In the case of a folding box, three bent portions are formed around the circumference in the middle. Such a structure is called a folded plate structure, and the rigidity is enhanced as if a virtual reinforcing material was formed at the bent portion. In other words, it works like a bamboo knot. This is one of the second effects.

Another of the second effects of the present invention is that the present invention is made up of a combination of only special elements called commonly called Miura folding, and its mechanism has been clarified to give rigidity after deployment. . FIG. 6 is an explanatory view (perspective view) of the folding box structure in which the ends are constrained. It is assumed that a couple F as shown in the figure is applied to this box structure. The usual idea is that it bends in a zigzag, so if an external force in that direction is applied, it seems to cause considerable deformation. Actually it is a mistake.

In this box structure, modules A and B are joined back to back. In other words, two Miura folds are joined back to back. Due to the unfolding characteristics of the Miura fold, when a crushing force acts in the vertical direction on the module B side, the horizontal direction also shrinks synchronously (displacement -d). On the other hand, when a force that extends vertically is applied to the module A side, the lateral direction extends (displacement + d). Therefore, at the connecting part of modules A and B, they try to move in opposite directions. The working force is the opposite and equal. Therefore, it is interpreted that the deformation is completely suppressed against such a couple.

Contrary to the first embodiment, this is a folding box structure with a relatively soft sheet that is specialized in folding characteristics and does not require high rigidity when deployed. In this embodiment, it will be read as a folding bag. The most common form of bag is to join the three edges of two rectangular sheets and use the remaining edge as the bag mouth. Usually, the bag mouth has two sheets joined together in a straight line.

When the present invention is applied to a bag, as shown in FIG. 2B, a diamond-shaped opening L exists in a folded state. It should be noted that the bag mouth is partially opened when folded. Since the bag of the present invention has the opening of the bag first, it is easy to pinch that portion. Secondly, since there is a property of the unfolding structure by pulling, the whole process automatically starts unfolding and the operation of opening the bag is consistently and almost automatically performed. Such a function is required for an operation that requires promptness, certainty, and ease in an operation of opening a bag and inserting an object inside.

There may be various variations in the method of restraining the end of the folding box structure of the present invention.

In this specification, the term “sheet” refers to general planar materials, and includes paper, plastic sheets, flat plates, sandwich plates, composite structures, lattices, and the like. It goes without saying that all embodiments exist for folds or hinges.

Folding box shape and components (description, plan view) (A) Folding box shape / development (description, perspective view) (b) Folding box shape / storage (description, perspective view) Folding box structure / components (plan view) (A) Folding box structure / when unfolded (perspective view) (b) Folding box structure / when stowed (perspective view) (A) Folding box structure / effect of virtual reinforcement (perspective view) (b) Square box structure (perspective view) Reinforcement effect by miura fold (description, perspective view)

DESCRIPTION OF SYMBOLS 1 Parallelogram sheet 2 Fold or crease 3 Lid 4 Paste margin or plug 5 Restraint material 6 Virtual reinforcement A Module group B Module group C Box shape or materialized box structure F External force L Opening M Module (Miura folding element )
X, Y Cartesian coordinate system d Displacement e Side edge g Sliding mirror line m Reflecting mirror line p Parallelogram q Parallelogram r Parallelogram s Parallelogram θ Parallel angle inside angle

Claims (5)

In the (XY) coordinate system, two adjacent parallelograms having the bases on two parallel lines in the (X) axis direction, the same inner angle (θ), and sharing one hypotenuse (p) , (Q), and (p), (q) with one base as a mirror (m), forming two parallelograms (r), (s), respectively, and four parallelograms A module M comprising the shapes (p), (q), (r), and (s) is formed, and at least one module (M) is translated without gaps in the (Y) axis direction to form a module group (A) And the module group (B) is a mirror reflection of the module group (A) with respect to the sliding mirror (g) in the (Y) axis direction, and the module group (A) and the module group (B) are virtually As a two-dimensional body, the back sides of them are combined, the corresponding side edges (e) are joined, and the sides of the parallelogram are the edges. A box shape (C) is formed, and the box shape (C) is formed as a solid box structure with a parallelogram surface as a sheet and a ridge as a hinge, and a structure for closing at the end of the box structure is added. Folding box structure. In the (XY) coordinate system, two adjacent parallelograms having the bases on two parallel lines in the (X) axis direction, the same inner angle (θ), and sharing one hypotenuse (p) , (Q), and (p), (q) with one base as a mirror (m), forming two parallelograms (r), (s), respectively, and four parallelograms A module M comprising the shapes (p), (q), (r), and (s) is formed, and at least one module (M) is translated without gaps in the (Y) axis direction to form a module group (A) And the module group (B) is a mirror reflection of the module group (A) with respect to the sliding mirror (g) in the (Y) axis direction, and the module group (A) and the module group (B) are virtually As a two-dimensional body, the back sides of them are combined, the corresponding side edges (e) are joined, and the sides of the parallelogram are the edges. Folding characterized in that a box shape (C) is formed, the box shape (C) is a solid box structure with a parallelogram surface as a sheet and a ridge as a hinge, and a restraint member for the degree of freedom of deployment is added. Box structure. In the (XY) coordinate system, two adjacent parallelograms having the bases on two parallel lines in the (X) axis direction, the same inner angle (θ), and sharing one hypotenuse (p) , (Q), and (p), (q) with one base as a mirror (m), forming two parallelograms (r), (s), respectively, and four parallelograms A module M comprising the shapes (p), (q), (r), and (s) is formed, and at least one module (M) is translated without gaps in the (Y) axis direction to form a module group (A) And the module group (B) is a mirror reflection of the module group (A) with respect to the sliding mirror (g) in the (Y) axis direction, and the module group (A) and the module group (B) are virtually As a two-dimensional body, the back sides of them are combined, the corresponding side edges (e) are joined, and the sides of the parallelogram are the edges. Forming a box shape (C), and adding a closing structure that combines the shape of the box shape (C) with a parallelogram surface as a sheet and a ridge as a hinge, and also serves as a constraint on the degree of freedom of deployment. Features a folding box structure. In the (XY) coordinate system, two adjacent parallelograms having the bases on two parallel lines in the (X) axis direction, the same inner angle (θ), and sharing one hypotenuse (p) , (Q), and (p), (q) with one base as a mirror (m), forming two parallelograms (r), (s), respectively, and four parallelograms A module M comprising the shapes (p), (q), (r), and (s) is formed, and at least one module (M) is translated without gaps in the (Y) axis direction to form a module group (A) And the module group (B) is a mirror reflection of the module group (A) with respect to the sliding mirror (g) in the (Y) axis direction, and the module group (A) and the module group (B) are virtually (A) and (B). A method for manufacturing a main part of a folding box structure, characterized in that a parallelogram surface is a sheet, a side is a hinge, and the back surfaces thereof are combined and corresponding edges (e) are joined. In the (XY) coordinate system, two adjacent parallelograms having the bases on two parallel lines in the (X) axis direction, the same inner angle (θ), and sharing one hypotenuse (p) , (Q), and (p), (q) with one base as a mirror (m), forming two parallelograms (r), (s), respectively, and four parallelograms A module M comprising the shapes (p), (q), (r), and (s) is formed, and at least one module (M) is translated without gaps in the (Y) axis direction to form a module group (A) And the module group (B) is a mirror reflection of the module group (A) with respect to the sliding mirror (g) in the (Y) axis direction, and the module group (A) and the module group (B) are virtually As a two-dimensional body, the back sides of them are combined, the corresponding side edges (e) are joined, and the sides of the parallelogram are the edges. To form a box shape (C), the preparation of the backbone portion of the folding box structure, characterized in that integrally molded by the box shape (C), the plastic material.

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