JP2019073318A - container - Google Patents

Abstract

To provide a container that can suppress spring-back and easily crush even a shape with symmetric properties.SOLUTION: The container includes a helical structure cylindrical part 6 provided between two ring parts 5 next to each other in the axial direction. The helical structure cylindrical part has multiple inclined straight lines 23 which are ridge-folding lines when viewed from the outside of the container 1 and arranged at approximately equal intervals in the circumferential direction. The helical structure cylindrical part is folded as if being put inside of the ring on one side. Of the torsional angle from one end 23A of the inclined straight line to the other end 23B in the circumferential direction of the helical structure cylindrical part, if the radius of the first ring part of the two ring parts is r, the radius of the second ring part is R, the number of the inclined straight lines is n, and the length of the helical structure cylindrical part in the axial direction is h, the torsional angle defined by the format below is more than θ.(F1)SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container.

  In recent years, when disposing a cylindrically formed container such as a plastic bottle, it is required to crush the container to a small size. Conventionally, various methods have been devised for collapsing the container in its axial direction (see, for example, Patent Document 1).

  According to Patent Document 1, by applying torsion to a cylindrical trunk, it changes to a buckling pattern in which projections and depressions are generated in a radial direction, and a buckling pattern anterior body (helical structure that is folded in the axial direction of the trunk A container provided with a tube portion is disclosed. In the buckling pattern front body, a plurality of peak lines (crest fold lines) arranged in the circumferential direction and a plurality of valley lines (valley fold lines formed so as to bridge the upper and lower ends of two adjacent peak lines) And is formed. In the container of patent document 1, reduction of the twisting force required for folding of a buckling pattern prior body is aimed at by arranging a plurality of peak lines at unequal intervals.

  Further, according to Patent Document 1, the buckling pattern pre-body is twisted to be folded, and the buckling pattern is folded back inside the trunk by being crushed in the axial direction, and the result is stable. It is described that the container recovery (so-called springback) is suppressed.

Patent No. 5713423 gazette

By the way, containers, such as a plastic bottle, are formed of raw materials, such as a synthetic resin which has predetermined | prescribed elasticity. Therefore, even in the case of the container of Patent Document 1, springback may still occur due to the elasticity of the container material. That is, in containers such as plastic bottles, there is room to further suppress springback.
In order to further suppress the springback of the container, for example, it is also conceivable to form the container from a material with less elasticity. However, in this case, since the container is easily crushed even in the state of containing a liquid such as a beverage, there is a possibility that the liquid in the container may leak out.

  Moreover, in the container of patent document 1, since the peak lines which comprise a helical structure cylinder part are arranged at irregular intervals, although a container can be easily crushed with small force, the container which is inferior to the aesthetics which does not have symmetry. It is not preferable.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a container which can further suppress springback and can be easily crushed even in a shape having symmetry.

In order to solve this problem, the container of the present invention is a container including a main body cylindrical portion formed in a cylindrical shape, and the main body cylindrical portion is formed annularly in the axial direction of the main body cylindrical portion. It is disposed between a plurality of ring portions arranged at intervals and the two ring portions adjacent in the axial direction, and the two ring portions are relatively rotated around the axis of the main tube portion. A helical structure cylindrical portion in which the two ring portions are folded so as to approach each other in the axial direction; and the helical structure cylindrical portion extends in the axial direction so as to connect the two ring portions. A plurality of inclined straight lines which are inclined in the circumferential direction and which are mountain-folded lines viewed from the outside of the container and arranged at substantially equal intervals in the circumferential direction, two of the inclined straight lines adjacent in the circumferential direction, The connecting line between the helical tube and the two ring parts A plurality of diagonal straight lines extending obliquely at an angle larger than the inclined straight line with respect to the axial direction so as to connect the diagonals of the formed quadrangle, and viewed as a valley fold line from the outside of the container; And the helical tube portion is folded so that at least a portion of the tubular portion enters inside of any one of the ring portions, and extends from one end to the other end of the inclined straight line in the circumferential direction of the helical structure tube portion The twist angle is given by the radius of the first ring portion of the two ring portions as r, the radius of the second ring portion as R, the number of the inclined straight lines as n, and the helical structure cylindrical portion in the axial direction It is characterized in that the length is h and the twist angle θ ₀ or more defined by the following equation.

  In the container of the present invention, by folding a part of the helical structure cylinder part so as to enter the inside of either one of the ring parts, the helical structure cylinder part is folded back inside the main body cylinder part and stable so as to suppress the return. Not only that, the folded back helical tube portion is caught on the inside of one ring portion. Thereby, the folded helical structure cylinder part can be hold | maintained inside one ring part. Therefore, the springback after crushing the container in the axial direction can be further suppressed as compared with the prior art.

Further, in the container of the present invention, the helical structure cylindrical portion is arranged even if the inclined straight lines of the helical structure cylindrical portion are arranged at substantially equal intervals because the torsional angle is larger than the torsional angle θ ₀ defined by the above equation. Force (twisting force) required for folding the seat can be reduced. That is, the container of the present invention can be easily crushed with a small force while having a helical structure cylindrical portion excellent in aesthetics having symmetry.

  In the container, the two ring portions may have a higher strength in the axial direction than the helical tube portion.

  Further, in the container, the helical structure cylindrical portion is formed in an annular shape extending in the circumferential direction at a midway portion in the axial direction of the helical structure cylindrical portion, and the annular structure bends radially inward when the helical structure cylindrical portion is folded. It may have a flexible portion.

  Further, in the container, the diameter dimension of the first ring portion is smaller than the diameter dimension of the second ring portion, and in the helical tube portion, the first ring portion is disposed inside the second ring portion. Or may be folded to pass inside the second ring portion.

  Further, in the container, the diameter dimensions of the two ring portions may be set such that the first ring portion fits inside the second ring portion.

  Further, in the container, the main tube portion is continuously formed at a position adjacent to the second ring portion on the opposite side to the helical structure tube portion in the axial direction, and at least the folded helical structure tube You may provide the insertion cylinder part which a part entraps.

  Further, in the container, the insertion cylindrical portion may have a higher strength in the axial direction than the helical structure cylindrical portion.

  Further, in the container, at least three of the ring portions are provided, and diameter dimensions of two end ring portions positioned at both ends in the axial direction among the plurality of ring portions are positioned between the two end ring portions. The diameter dimension of one end ring portion of the two end ring portions may be smaller than the diameter dimension of the other end ring portion.

  Further, in the container, the diameter dimension of the one end ring portion and the other end ring portion may be set such that the one end ring portion fits inside the other end ring portion.

  Further, in the container, at least two of the midway ring portions are arranged at intervals in the axial direction, and one midway ring portion of the two midway ring portions adjacent in the axial direction is the other midway ring portion. It may be formed in the shape of a cylinder which is inserted by folding the helical structure cylinder portion located between the ring portion and the ring portion.

  Further, in the container, the inclined straight lines of the two adjacent helical structure cylindrical portions in the axial direction may be inclined in mutually opposite directions with respect to the axis line.

  Further, in the container, the inclined straight lines of the two adjacent helical structure cylindrical portions in the axial direction may be inclined in the same direction with respect to the axis.

  According to the present invention, springback after crushing the container in the axial direction can be further suppressed as compared with the prior art, and the container can be easily made with a small force while having a helical structure cylindrical part having an excellent appearance with symmetry. It can be crushed.

It is a side view showing a container concerning a first embodiment of the present invention. It is an expanded sectional view which shows each ring part in the container of FIG. 1, (a) is an upper end ring part, (b) is a halfway ring part, (c) is a lower end ring part. It is a broken line development view of the upper spiral structure cylinder part in the container of FIG. It is a broken line development view of the lower spiral structure cylinder part in the container of FIG. It is a figure for demonstrating the twist angle (theta) in the helical structure cylinder part of the container of FIG. It is a schematic diagram which shows the process in which a helical structure cylinder part is folded in the container of FIG. It is a schematic diagram which shows the process in which a helical structure cylinder part is folded in the container of FIG. It is a schematic diagram which shows the process in which a helical structure cylinder part is folded in the container of FIG. It is a schematic diagram which shows the process in which a helical structure cylinder part is folded in the container of FIG. It is a schematic diagram which shows the process in which a helical structure cylinder part is folded in the container of FIG. It is a side view showing a container concerning a second embodiment of the present invention. It is a side view showing a container concerning a third embodiment of the present invention. It is a broken line development view of the intermediate part helical structure cylinder part in the container of FIG. It is a side view which shows an example of the container which concerns on other embodiment of this invention.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the container 1 of the present embodiment includes a main body cylindrical portion 2. The container 1 of the present embodiment also includes the container bottom 3 and the container opening 4. The main body cylindrical portion 2 is formed in a cylindrical shape in which both ends in the axial direction (vertical direction in FIG. 1) are open. The container bottom portion 3 is formed in a bottomed cylindrical shape, and is connected to a first end (a lower end in FIG. 1) of the main body cylindrical portion 2 in the axial direction. The container bottom 3 closes the opening at the first end of the main cylinder 2.

  The container opening 4 is formed in a cylindrical shape, and is connected to a second end (upper end in FIG. 1) of the main body cylindrical portion 2 in the axial direction. A lid (not shown) such as a cap, for example, is detachably attached to the container opening 4. The container opening 4 in the present embodiment is formed in a tubular shape smaller than the diameter dimension of the container bottom 3, the ring 5 of the main tube 2 to be described later, and the helical tube 6.

The main body cylindrical portion 2 includes a plurality of ring portions 5 and a helical structure cylindrical portion 6.
The ring portion 5 is formed in an annular shape. The ring portion 5 may be formed, for example, in a circular ring shape as viewed in the axial direction, but in the present embodiment, it is formed in a polygonal ring shape. The number of ring parts 5 may be two or more. The number of ring parts 5 in the present embodiment is three. The three ring portions 5 are arranged at intervals in the axial direction of the main body cylindrical portion 2. In the illustrated example, the three ring portions 5 are arranged at equal intervals, but may be arranged at unequal intervals, for example. In the following description, the two ring portions 5 located at both axial ends of the main cylindrical portion 2 are referred to as end ring portions 11 and 12, and the ring portion 5 located between the two end ring portions 11 and 12 is halfway It may be called a ring portion 13.

Each ring portion 5 has a higher strength in the axial direction than a helical tube 6 described later. That is, the durability (hardness of deformation) of the ring portion 5 when an external force is applied from the axial direction is higher than that of the helical tube 6.
Further, each ring portion 5 may have a higher strength in the direction (radial direction) orthogonal to the axial direction than the helical structure tube portion 6. That is, the durability of the ring portion 5 when an external force acts from the radial direction may be higher than that of the helical tube 6.

As a method of increasing the strength of the ring portion 5 more than the helical structure cylinder portion 6, for example, a structure in which the cross section of the ring portion 5 including the axis A1 of the main body cylinder portion 2 is a curve or unevenness is provided. For example, the thickness in the radial direction may be larger than that of the helical tube 6 or the like. The ring part 5 of this embodiment has the uneven structure part 14 as shown in FIG. The uneven structure portion 14 may be formed in a U-shape or a V-shape in a cross section including the axis line A1. The uneven structure portion 14 formed in a U-shaped cross section or a V-shaped cross section may be formed in a concave shape which is recessed inward in the radial direction when viewed from the outside of the container 1 as illustrated in FIG. Further, the concavo-convex structure portion 14 may be formed, for example, in a convex shape that protrudes outward in the radial direction when viewed from the outside of the container 1.
The ring portion 5 having the concavo-convex structure portion 14 can increase the strength of the ring portion 5. The shape of the uneven structure portion 14 is not limited to a U-shaped cross section or a V-shaped cross section, and may be an S-shaped cross section or the like.

  The radial dimensions of the three ring parts 5 may, for example, be equal to one another. Moreover, the diameter dimension of one ring portion 5 among the three ring portions 5 may be different from the diameter dimension of the other two ring portions 5. In the present embodiment, the diameter dimensions of two ring portions 5 adjacent in the axial direction among the three ring portions 5 are different from each other.

  Specifically, the diameter of the midway ring 13 (first ring) is smaller than the diameter of the two end rings 11 and 12 (second ring) adjacent to the midway ring 13. . The diameter of the upper end ring portion 11 (one end ring portion) located on the container opening 4 side of the two end ring portions 11 and 12 is the lower end ring portion 12 located on the container bottom 3 side. It is smaller than the diameter of (the other end ring portion). That is, in the present embodiment, the diameter dimension of the midway ring portion 13 among the three ring portions 5 is the smallest, and the diameter dimension of the lower end ring portion 12 is the largest.

The container opening 4 may be directly connected to the upper end ring 11 if the diameter dimensions of the upper end ring 11 and the container opening 4 are equal to each other. In the present embodiment, as shown in FIG. 1, the diameter dimension of the container opening 4 is smaller than the diameter dimension of the upper end ring portion 11. For this reason, an upper insertion cylindrical portion 41 described later is provided between the upper end ring portion 11 and the container opening 4.
The radial dimensions of the lower end ring 12 and the container bottom 3 may, for example, be different from one another, but are equal to one another in this embodiment. For this reason, the container bottom 3 may be directly connected to the lower end ring 12. In the present embodiment, a lower insertion cylindrical portion 42 described later is provided between the lower end ring portion 12 and the container bottom portion 3.

  The radial dimensions of the midway ring portion 13 and the upper end ring portion 11 may be set, for example, such that the midway ring portion 13 passes through the inside of the upper end ring portion 11 without being caught. In the present embodiment, the diameter dimensions of the midway ring portion 13 and the upper end ring portion 11 are set such that the midway ring portion 13 fits (is hooked) inside the upper end ring portion 11.

The diameter dimensions of the upper end ring portion 11 and the lower end ring portion 12 may be set, for example, such that the upper end ring portion 11 passes through the inside of the lower end ring portion 12 without being caught. In the present embodiment, the diameter dimension of the upper end ring portion 11 and the lower end ring portion 12 is set such that the upper end ring portion 11 fits (is hooked) inside the lower end ring portion 12.
Further, the diameter dimensions of the midway ring portion 13 and the lower end ring portion 12 in the present embodiment are set such that the midway ring portion 13 passes through the inside of the lower end ring portion 12 without being caught.

  The helical tube 6 is disposed between two ring portions 5 adjacent to each other in the axial direction of the main tube 2. In the present embodiment, one helical structure cylindrical portion 6 is disposed between the midway ring portion 13 and the upper end ring portion 11 and between the midway ring portion 13 and the lower end ring portion 12. . That is, the main body cylindrical portion 2 of the present embodiment is provided with two helical structure cylindrical portions 6 (upper helical structure cylindrical portion 21 and lower helical structure cylindrical portion 22).

  Each helical structure tube portion 6 relatively rotates two ring portions 5 located on both sides in the axial direction about the axis line A1 of the main body tube portion 2 (twisting the helical structure tube portion 6 around the axis line A1 By twisting, the two ring parts 5 are folded so as to approach each other in the axial direction (see FIGS. 6 to 10). Moreover, each helical structure cylinder part 6 is folded so that it may enter inside any one of the two ring parts 5 located in the both sides.

As shown in FIGS. 1, 3 and 4, each helical tube 6 has a plurality of inclined straight lines 23 and a plurality of diagonal straight lines 24.
The inclined straight line 23 extends obliquely in the circumferential direction of the helical tube 6 with respect to the axial direction so as to connect the two ring portions 5 located on both sides of the helical tube 6 with each other. The inclined straight line 23 is a mountain fold line when viewed from the outside of the container 1. The plurality of inclined straight lines 23 are inclined at the same angle with respect to the axial direction, and are arranged at substantially equal intervals in the circumferential direction. Here, “the plurality of inclined straight lines 23 are arranged at substantially equal intervals” means that the plurality of inclined straight lines 23 are strictly arranged at equal intervals, and the process of manufacturing or designing the container 1 or the like It also means that the plurality of inclined straight lines 23 are arranged slightly deviated from the equal intervals by the restriction.

  One end 23 A and the other end 23 B of the inclined straight line 23 are connected to each of the two ring portions 5 located on both sides of the helical tube 6. In the present embodiment, one end 23A and the other end 23B of the inclined straight line 23 are connected to corner portions of the ring portion 5 formed into a polygon. For this reason, the ring part 5 of this embodiment is formed in a substantially regular polygonal ring shape (see, for example, FIG. 5).

  The diagonal straight lines 24 connect the diagonals of quadrilaterals defined by two inclined straight lines 23 adjacent in the circumferential direction and connecting lines 25 and 26 between the helical tube 6 and the two rings 5. And extends at an angle larger than the straight line 23 with respect to the axial direction. The diagonal straight line 24 is a valley fold line when viewed from the outside of the container 1. Similar to the inclined straight line 23, the plurality of diagonal straight lines 24 are inclined at the same angle with respect to the axial direction, and are arranged at substantially equal intervals in the circumferential direction.

Thereby, in the helical tube 6, the inclined straight lines 23 and the diagonal straight lines 24 are alternately arranged in the circumferential direction. That is, the helical tube 6 has a triangular plate-like first plate-like part 27 defined by the inclined straight line 23, the diagonal straight line 24 and one connecting line 25, the inclined straight line 23, the diagonal straight line 24 and the other. And a second plate-like part 28 having a triangular plate shape, which is defined by the connecting lines 26 of the above, is alternately arranged in the circumferential direction.
The outer surface area of the helical structure cylinder 6 consisting of the first plate-like part 27 and the second plate-like part 28 located on both sides of the inclined straight line 23 is a convex surface projecting outward in the radial direction of the helical structure tube 6 . On the other hand, the outer surface area of the helical structure cylinder 6 consisting of the first plate-like part 27 and the second plate-like part 28 located on both sides of the diagonal straight line 24 has a concave surface recessed inward in the radial direction of the helical structure tube 6 It has become.

In the helical tube 6, as shown in FIG. 5, the twist angle θ from the one end 23 A to the other end 23 B of the inclined straight line 23 in the circumferential direction of the helical tube 6 is defined by It is set based on the theoretical twist angle θ ₀ . Torsion angle theta, theta ₀ is an angle leading to the other end 23B from one end 23A of the inclined straight lines 23 the axis A1 as the center of the spiral structure tube portion 6 (container 1).

In [Formula 1], r is the radius of the first ring portion 5 (for example, the ring portion 5 having a small diameter) of the two ring portions 5 located on both sides of the helical structure cylinder 6. Further, R is the radius of the second ring portion 5 (for example, the ring portion 5 having a large diameter) among the two ring portions 5 positioned on both sides of the helical tube 6. Further, n is the number of inclined straight lines 23 in the helical tube 6. H is the length of the helical tube 6 in the axial direction.
The theoretical twist angle θ ₀ obtained by the above equation is a condition under which the helical tube 6 can be folded if there is no thickness of the wall of the container 1.

And in the helical structure cylinder part 6, the twist angle θ may be set to the theoretical twist angle θ ₀ or more (one or more times the theoretical twist angle θ ₀ ), and more preferably, the twist angle θ is It may be set to be larger than the theoretical twist angle θ ₀ (more than one time of the theoretical twist angle θ ₀ ). The twist angle θ may be set, for example, to four times or less of the theoretical twist angle θ ₀ .
Of the helical tube 6 is set to the theoretical twist angle θ ₀ or more, the first plate-like part 27 and the second plate-like part located on both sides of the diagonal straight line 24 in the helical tube 6 This means that the angle that the part 28 makes with the outer surface side of the helical tube 6 (hereinafter, referred to as surface angle) can be made smaller. Since the surface angle is reduced by making the twist angle θ 1 or more of the theoretical twist angle θ ₀ , the container 1 can be easily crushed with a small force. Further, by setting the twisting angle θ to four times or less of the theoretical twisting angle θ ₀ , design and manufacture of the helical tube portion become easy.

  The lengths of the two axially arranged helical structure tubular portions 6 may be different, for example, but they are equal as shown in FIG. 1 in the present embodiment. Moreover, although the number of inclination straight lines 23 of the helical structure cylinder part 6 may differ, for example between two helical structure cylinder parts 6, they are mutually equal in this embodiment. The number of inclined straight lines 23 of the helical tube 6 may be arbitrary, but in the present embodiment, the number of the inclined straight lines 23 is twelve so as to increase the volume of the container 1. Further, the connection position of the inclined straight line 23 of the helical tube 6 to the midway ring 13 is, for example, in the circumferential direction between the two helical tubes 6 (upper helical tube 21 and lower helical tube 22). Although they may be offset from each other, they coincide with each other in the present embodiment.

  In the present embodiment, the inclined straight lines 23 of the two axially adjacent helical structure cylindrical portions 6 are inclined in mutually opposite directions with respect to the axial direction. That is, two helical structure cylinder parts 6 which adjoin axial direction are exhibiting the inversion spiral structure where the inclination straight line 23 was arranged in zigzag form in the axial direction.

  The main body cylindrical portion 2 of the present embodiment further includes an insertion cylindrical portion 7. The insertion cylindrical portion 7 is formed in a row at a position adjacent to the end ring portions 11 and 12 (second ring portion) opposite to the helical structure cylindrical portion 6. At least the folded helical structure cylinder 6 is inserted into the insertion cylinder 7. In the insertion cylindrical portion 7 of the present embodiment, also the halfway ring portion 13 (first ring portion) that has passed through the inside of the end ring portions 11 and 12 (second ring portion) when the helical structure cylindrical portion 6 is folded. Can enter. The insertion tube portion 7 has a strength that does not deform inside the container 1 even when an external force is applied from the outside of the main body tube portion 2 so that the spiral structure tube portion 6 and the middle ring portion 13 can enter. You may In particular, it is more preferable that the strength of the insertion tube 7 in the axial direction is higher than the strength of the helical tube 6.

  As a method of increasing the strength of the insertion cylinder 7 more than the helical structure cylinder 6, for example, a structure is provided such that the cross section of the insertion cylinder 7 including the axis A1 of the main cylinder 2 becomes uneven. The thickness may be arbitrary, for example, larger than that of the helical tube 6.

In the insertion cylindrical portion 7 of the present embodiment, an upper insertion cylindrical portion 41 formed continuously to the upper end ring portion 11 and a lower insertion cylindrical portion 42 formed continuously to the lower end ring portion 12 are included. is there.
The upper insertion cylindrical portion 41 is disposed between the upper end ring portion 11 and the container opening 4. In the present embodiment, the diameter dimension of the container opening 4 is smaller than the diameter dimension of the upper end ring portion 11. For this reason, the upper insertion cylindrical portion 41 is formed in a cylindrical shape in which the diameter becomes smaller as it goes from the upper end ring portion 11 to the container opening 4.

  The outer surface of the upper insertion cylindrical portion 41 may be formed, for example, in the shape of a conical surface of a truncated cone, but in the present embodiment, it is formed in the shape of an outer surface of a hemisphere. Further, in order to improve the strength of the upper insertion cylindrical portion 41 of the present embodiment, a plurality of mountain fold lines 43 are formed as viewed from the outside of the container 1. The plurality of mountain fold lines 43 are arranged to divide the upper insertion cylindrical portion 41 into a plurality of plate-like parts 44. The arrangement pattern of the plurality of mountain fold lines 43 may be arbitrary. In the present embodiment, the plurality of mountain fold lines 43 are arranged such that the plurality of plate-like parts 44 are all triangular.

  Although the lower side insertion cylinder part 42 may be formed, for example as a part of container bottom part 3, it demonstrates as a structure separate from the container bottom part 3 by this embodiment. The lower insertion cylindrical portion 42 is disposed between the lower end ring portion 12 and the container bottom 3. In the present embodiment, the diameter dimensions of the lower end ring portion 12 and the container bottom portion 3 are equal to each other. For this reason, the lower side insertion cylinder part 42 is formed in the cylinder shape whose diameter dimension is constant.

The lower insertion cylindrical portion 42 may be formed, for example, in a cylindrical shape. In order to improve the strength of the lower insertion cylindrical portion 42 of the present embodiment, a plurality of mountain fold lines 45 are formed as viewed from the outside of the container 1. The plurality of mountain fold lines 45 may be arranged to divide at least the lower insertion cylinder 42 into a plurality of plate-like parts 46. The mountain fold line 45 of the lower insertion cylindrical portion 42 in the present embodiment is formed such that the lower insertion cylindrical portion 42 becomes a polygonal cylindrical portion.
Moreover, the lower side insertion cylinder part 42 of this embodiment has the uneven | corrugated structure part 47 for improving the intensity | strength of the lower side insertion cylinder part 42 similarly to the ring part 5 mentioned above. The uneven structure portion 47 may be formed at any position in the axial direction of the lower insertion cylindrical portion 42. In the present embodiment, the concavo-convex structure portion 47 is formed at the connection portion with the container bottom portion 3.

Next, a method of folding (smallening) the container 1 of the present embodiment will be described.
When the container 1 of the present embodiment is folded, the two ring portions 5 located on both sides of each helical structure cylinder 6 may be relatively rotated about the axis A1 of the main body cylinder 2, ie, each The helical tube 6 may be twisted. For example, in the case of twisting the upper helical structure tube portion 21, the upper end ring portion 11 is turned clockwise with respect to the midway ring portion 13 in a plan view when the upper helical structure tube portion 21 is viewed from the container opening 4 side. You can rotate it. The lower helical structure cylinder 22 may be twisted in the opposite direction to the upper helical structure cylinder 21.
Hereinafter, the folding of the upper spiral structure cylinder portion 21 will be described mainly with reference to FIGS.

  When the upper helical structure tube portion 21 is twisted, the upper helical structure tube portion 21 decreases the surface angle between the first plate-like part 27 and the second plate-like part 28 adjacent in the circumferential direction, that is, The adjacent first plate-like parts 27 and second plate-like parts 28 are folded so as to overlap each other. Further, when the upper helical structure tube portion 21 is twisted from the initial state shown in FIG. 6, as shown in FIG. 7, the upper helical structure tube portion 21 is bent radially inward at a middle portion in the axial direction. In FIG. 7, reference numeral 29 indicates a bent portion in the upper helical structure cylinder 21. In addition, when the upper helical structure cylinder 21 is twisted, the two ring portions 5 (upper end ring portion 11 and middle ring portion 13) located on both sides of the upper helical structure cylinder 21 move in the axial direction of the main cylinder 2 Get close to each other.

When the upper helical structure tube portion 21 is further twisted from the state shown in FIG. 7, as shown in FIG. 8, at least a portion of the upper helical structure tube portion 21 is inside the upper end ring portion 11 (one ring portion). Folded to get into.
Specifically, when twisting the upper helical structure tube portion 21, the upper helical structure tube portion 21 tries to reverse the boundary between the upper helical structure tube portion 21 and the upper end ring portion 11 as a hinge. A force acts to cause a so-called snap through phenomenon in which the upper spiral structure tubular portion 21 is folded back. In other words, the upper spiral structure cylindrical portion 21 is folded back so that the bent portion 29 of the upper spiral structure cylindrical portion 21 enters or passes through the upper end ring portion 11. Thereby, at least a part of the upper spiral structure cylindrical portion 21 enters the inside of the upper end ring portion 11. In addition, a part of the upper spiral structure cylindrical portion 21 enters the upper insertion cylindrical portion 41. The upper helical structure cylinder 21 folded back has the intermediate ring 13 in the direction in which the intermediate ring 13 moves with respect to the upper end ring 11 (upper direction in FIG. 8) when the upper helical structure 21 is folded. The upper end ring portion 11 is urged.

In the state shown in FIG. 8, the upper helical structure cylinder 21 is further twisted and folded (or an external force is applied to the container 1 so that the middle ring 13 (the other ring) gets closer to the upper end ring 11), The midway ring portion 13 is disposed inside the upper end ring portion 11 as shown in FIG. 9 or passes inside the upper end ring portion 11 as shown in FIG. In the state shown in FIGS. 9 and 10, the midway ring portion 13 is fitted (hooked) to the inside of the upper end ring portion 11. Further, in the state shown in FIG. 10, substantially the entire upper spiral structure cylindrical portion 21 and the halfway ring portion 13 enter the upper insertion cylindrical portion 41.
Thus, the folding of the upper helical structure cylinder portion 21 is completed.

The lower helical structure tube portion 22 can be folded in the same manner as the upper helical structure tube portion 21 described above. However, when the lower helical structure cylinder 22 is folded, a part or the whole of the lower helical structure cylinder 22 enters the inside of the lower end ring 12 or passes inside the lower end ring 12. Into the lower insertion tube 42.
Furthermore, in a state in which both the upper spiral structure cylindrical portion 21 and the lower spiral structure cylindrical portion 22 are folded, at least one of the upper end ring portion 11, the upper spiral structure cylindrical portion 21 and the middle ring portion 13 is used as the lower end ring It can be inserted into the inside of the portion 12 or the lower insertion tube portion 42. Also, the upper end ring portion 11 can be fitted (hooked) inside the lower end ring portion 12.

  As described above, in the container 1 of the present embodiment, at least a part of the helical structure cylinder 6 is either one of the two ring portions 5 located on both sides of the helical structure cylinder 6. It is folded to get inside. Not only is the folded helical structure cylinder 6 folded inside the main body cylinder 2 to be stable so as to suppress the return, but the folded helical structure cylinder 6 enters the inside of the one ring 5 and is hooked Hang. Thereby, the helical structure cylinder part 6 turned back can be hold | maintained inside the said one ring part 5. As shown in FIG. Therefore, it is possible to further suppress the spring back after crushing the container 1 in the axial direction as compared with the prior art.

Further, in the container 1 of the present embodiment, the twist angle θ of the helical tube 6 is not less than the theoretical twist angle θ ₀ defined by [Expression 1] (one or more times of the theoretical twist angle θ ₀ ) Is set. Thereby, in the helical structure cylinder part 6, the surface angle of the 1st plate-shaped part 27 and the 2nd plate-shaped part 28 which adjoin the circumferential direction can be made small. Even if the inclined straight lines 23 of the helical tube 6 are arranged at substantially equal intervals, the force (torsion force) necessary for folding the helical tube 6 can be reduced by reducing the surface angle of the tubular tube 6. It can be reduced. Therefore, the container 1 of the present embodiment can be easily crushed with a small force while having the helical structure tubular portion 6 excellent in aesthetics having symmetry.

Moreover, in the container 1 of the present embodiment, when the twist angle θ is 4 times or less of the theoretical twist angle θ ₀ , the surface angle of the helical tube 6 becomes excessively small (for example, less than 80 degrees) Can be prevented. If the surface angle of the helical structure cylinder 6 becomes excessively small, the manufacture of the container 1 by molding (resin molding) becomes difficult, but in the container 1 of the present embodiment, the surface angle of the helical structure cylinder 6 becomes excessively small. Can be prevented. Therefore, the container 1 can be easily manufactured by molding.

  Further, in the container 1 of the present embodiment, the strengths of the two ring portions 5 positioned on both sides of the spiral structure cylindrical portion 6 are higher than the strength of the spiral structure cylindrical portion 6. For this reason, when the force for folding the helical structure cylinder 6 is applied in the axial direction (when the force to crush the container 1 in the axial direction acts on the container 1), the helical structure cylinder 6 has a ring portion Transform before 5 This makes it possible to appropriately apply a force for folding the helical structure cylinder 6.

  In addition, when the strength (in particular, the strength in the radial direction) of the ring portion 5 is higher than the strength of the helical structure cylindrical portion 6, the helical structure cylindrical portion 6 folded back inside the main body cylindrical portion 2 by folding is described above. Even if the helical structure cylinder 6 is pressed to the inside (radial direction) of the one ring 5 in the state of being hooked to the inside of the one ring 5, the one ring 5 is prevented from being deformed it can. Thereby, the helical structure cylinder part 6 folded back can be reliably hold | maintained inside the said one ring part 5. FIG. Therefore, the springback of the container 1 can be further suppressed.

  Further, in the container 1 of the present embodiment, the middle ring portion 13 (first ring portion) is disposed inside the upper end ring portion 11 (second ring portion) by folding the upper spiral structure cylindrical portion 21 or It passes inside the upper end ring portion 11. Similarly, the middle ring portion 13 may be disposed inside the lower end ring portion 12 (second ring portion) by passing the lower helical structure cylindrical portion 22 or passing the inside of the lower end ring portion 12. it can. Further, the upper end ring portion 11 can be disposed inside the lower end ring portion 12 or can be passed inside the lower end ring portion 12 by folding the two helical structure cylindrical portions 6. This makes it possible to crush the container 1 further smaller.

  Further, in the container 1 of the present embodiment, the middle ring portion 13 (first ring portion) is fitted (hooked) to the inside of the upper end ring portion 11 (second ring portion) by folding the upper spiral structure cylindrical portion 21. be able to. Further, the upper end ring portion 11 can be fitted (hooked) on the inner side of the lower end ring portion 12 by folding the two helical structure cylindrical portions 6. Thereby, the spring back after crushing container 1 to the axial direction can be prevented certainly.

Further, in the container 1 of the present embodiment, a part or the whole of the helical tube 6 enters the insertion tube 7 in a state where the helical tube 6 is folded. Thereby, the container 1 can be crushed further smaller.
In addition, at least a part of the folded helical structure cylinder 6 passes through the end ring portions 11 and 12 (second ring portion) and enters the insertion cylindrical portion 7, so that the helical structure cylindrical portion 6 becomes the main body cylindrical portion 2. Can be stably held in a folded state inside the As a result, it is possible to effectively prevent springback after crushing the container 1 in the axial direction.

  Further, in the container 1 of the present embodiment, the strength of the insertion cylindrical portion 7 is higher than the strength of the helical structure cylindrical portion 6. For this reason, when a force for folding the helical tube 6 is applied in the axial direction, the helical tube 6 is deformed earlier than the insertion tube 7. This makes it possible to appropriately apply a force for folding the helical structure cylinder 6. Furthermore, since the shape of the insertion cylinder 7 can be maintained when the spiral cylinder 6 is folded, a part or all of the folded spiral cylinder 6 can be more reliably inserted into the insertion cylinder 7. Therefore, the springback of the container 1 can be further suppressed.

  Further, in the container 1 of the present embodiment, the two helical structure cylindrical portions 6 adjacent to each other in the axial direction exhibit a reverse spiral structure, and the number of the helical structure cylindrical portions 6 arranged in the axial direction is even (two) It has become. Therefore, it is possible to fold the two helical structure cylinder parts 6 only by rotating the midway ring part 13 in the same direction with respect to the two end ring parts 11 and 12 around the axis line A1 of the container 1. Become. That is, it becomes possible to fold the two helical structure cylinder parts 6 without relatively rotating the two end ring parts 11 and 12. Therefore, it is possible to easily fold the plurality of helical structure cylindrical portions 6 only by bringing the two end ring portions 11 and 12 close to each other in the axial direction, that is, by crushing the container 1 in the axial direction.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIG. 11, focusing on the differences from the first embodiment.

  As shown in FIG. 11, the container 1D of the present embodiment includes a main body cylindrical portion 2D as in the first embodiment. Moreover, container 1D of this embodiment is equipped with the container bottom part 3 and the container opening part 4 similar to 1st embodiment.

The main body cylindrical portion 2D of the present embodiment includes a plurality of ring portions 5 and a helical structure cylindrical portion 6 as in the first embodiment.
The shape of the ring portion 5 viewed from the axial direction may be similar to that of the first embodiment. The number of ring portions 5 in the present embodiment may be, for example, five or more, but is four in the present embodiment. The four ring portions 5 may be arranged at equal intervals or unequal intervals in the axial direction of the main body cylindrical portion 2D. In the following description, the two ring portions 5 positioned at both axial ends of the main cylindrical portion 2D are referred to as end ring portions 11 and 12, and the two ring portions 5 positioned between the two end ring portions 11 and 12 May be referred to as mid-ring units 15D and 16D.

  Each ring portion 5 has higher strength in the axial direction than the helical tube 6 as in the first embodiment. Further, each ring portion 5 may have a higher strength in the radial direction than the helical structure cylindrical portion 6 as in the first embodiment. The method for enhancing the strength of the ring portion 5 may be the concavo-convex structure portion 14 (see FIG. 2) or the like similar to the first embodiment.

  At least one of two axially adjacent half ring portions 15D and 16D is referred to as a helical cylinder 6 (hereinafter, referred to as an intermediate spiral cylinder 30D) positioned between the two middle ring portions 15D and 16D. ) Is formed into a tubular shape which is inserted by being folded. In the present embodiment, the upper middle ring portion 15D (one middle ring portion) located on the container opening 4 side of the two middle ring portions 15D and 16D adjacent in the axial direction is the middle spiral structure cylindrical portion 30D. It is formed in the shape of a cylinder which enters by being folded. That is, the length of the upper middle ring portion 15D in the axial direction is longer than the lower middle ring portion 16D (the other middle ring portion) positioned on the container bottom 3 side with respect to the upper middle ring portion 15D. The length of the upper middle ring portion 15D may be set long, for example, so that the middle spiral structure cylindrical portion 30D which is folded and enters the upper middle ring portion 15D does not enter the upper spiral structure cylindrical portion 21.

  The radial dimensions of the four ring parts 5 may, for example, be equal to one another. In addition, only the diameter dimensions of some of the four ring portions 5 may be different from each other. In the present embodiment, the diameter dimensions of the four ring portions 5 are different from one another.

  Specifically, the diameter dimensions of the two middle ring portions 15D and 16D (first ring portions) are smaller than the diameter dimensions of the two end ring portions 11 and 12 (second ring portions). Further, the upper midway ring portion 15D (one midway ring portion) is larger than the lower midway ring portion 16D (the other midway ring portion). Further, as in the first embodiment, the diameter dimension of the upper end ring portion 11 is smaller than the diameter dimension of the lower end ring portion 12. That is, in the present embodiment, the diameter dimension of the lower middle ring portion 16D is the smallest among the four ring portions 5, and in the order of the upper middle ring portion 15D, the upper end ring portion 11, and the lower end ring portion 12, Is getting bigger.

  The diameter dimensions of the upper middle ring portion 15D and the lower middle ring portion 16D may be set, for example, so that the lower middle ring portion 16D passes through the inner side of the upper middle ring portion 15D without being caught, for example, the lower middle ring portion 16D. The side halfway ring portion 16D may be set to be fitted (hooked) on the inside of the upper side middle ring portion 15D. Further, the diameter dimensions of the upper middle ring portion 15D and the upper end ring portion 11 may be set, for example, so that the upper middle ring portion 15D passes through the inner side of the upper end ring portion 11 without being caught. The middle ring portion 15D may be set to be fitted (hooked) inside the upper end ring portion 11. The diameter dimensions of the upper end ring portion 11 and the lower end ring portion 12 are set such that the upper end ring portion 11 fits (is hooked) inside the lower end ring portion 12 as in the first embodiment. ing.

  The main tube portion 2D of the present embodiment includes three helical structure tubular portions 6 (upper helical structure tubular portion 21, lower helical structure tubular portion 22, and intermediate portion helical structure tubular portion 30D). The structure of each helical structure cylinder part 6 is the same as that of 1st embodiment. The upper spiral structure cylinder part 21 is disposed between the upper end ring part 11 and the upper middle ring part 15D. The lower helical structure cylinder portion 22 is disposed between the lower end ring portion 12 and the lower middle ring portion 16D. The middle helical structure cylinder 30D is disposed between the upper middle ring 15D and the lower middle ring 16D. The three helical structure cylinder parts 6 exhibit the same inverted helical structure as the first embodiment.

  The main body cylindrical portion 2D of the present embodiment includes two insertion cylindrical portions 7 (upper insertion cylindrical portion 41D and lower insertion cylindrical portion 42) similar to the first embodiment. The upper insertion cylindrical portion 41D of this embodiment is configured in the same manner as the first embodiment except that the outer surface is formed like a conical surface of a truncated cone and the dimension in the axial direction is different. It is done. The lower side insertion cylinder part 42 of this embodiment is comprised similarly to 1st embodiment except the dimension in an axial direction.

The container 1D of this embodiment can be crushed to a small size by the same folding method as that of the first embodiment.
That is, in the case of folding the container 1D of the present embodiment, it is sufficient to twist each helical structure cylinder 6 as in the first embodiment. For example, when twisting the middle helical structure cylinder 30D, the upper middle ring portion 15D with respect to the lower middle ring portion 16D in a plan view when the middle spiral structure cylinder 30D is viewed from the container opening 4 side. Just rotate it clockwise. The upper helical structure tube portion 21 and the lower helical structure tube portion 22 may be twisted in the opposite direction to the intermediate portion helical structure tube portion 30D.

When the upper spiral structure cylindrical portion 21 is twisted and folded, as in the case of the first embodiment, a part or all of the upper spiral structure cylindrical portion 21 or the upper middle ring portion 15D is formed inside the upper end ring portion 11 It can be inserted or inserted into the upper insertion cylindrical portion 41D. In addition, the upper middle ring portion 15D can be fitted (hooked) inside the upper end ring portion 11.
When the middle portion spiral structure cylindrical portion 30D is twisted and folded, in the same manner as in the case of the upper spiral structure cylindrical portion 21, a part or all of the middle portion spiral structure cylindrical portion 30D or the lower middle ring portion 16D is It can be made to enter inside the halfway ring part 15D. Also, the lower middle ring portion 16D can be fitted (hooked) inside the upper middle ring portion 15D.

When the lower helical structure tube portion 22 is twisted and folded, as in the case of the first embodiment, a part or the whole of the lower helical structure tube portion 22 is inserted inside the lower end ring portion 12; The lower insertion tube portion 42 can be inserted.
Further, in the state where all three helical structure cylindrical portions 6 are folded, the upper end ring portion 11, the upper helical structure cylindrical portion 21, the upper side middle ring portion 15D, the middle side spiral structure cylindrical portion 30D, and the lower side middle ring portion 16D At least one may be inserted into the inner side of the lower end ring portion 12 or the lower insertion cylindrical portion 42. Also, the upper end ring portion 11 can be fitted (hooked) inside the lower end ring portion 12.

According to container 1D of this embodiment, there exists an effect similar to 1st embodiment.
Further, according to the container 1D of the present embodiment, in a state where the middle portion spiral structure cylindrical portion 30D is folded, a part or the whole of the middle portion spiral structure cylindrical portion 30D enters the upper middle ring portion 15D. Thereby, even if it is container 1D which has three or more helical structure cylinder parts 6, container 1D can be crushed small.
In addition, the folded intermediate portion helical structure cylindrical portion 30D enters the upper middle ring portion 15D formed in a cylindrical shape, so that the intermediate portion helical structure cylindrical portion 30D is stably folded back inside the main body cylindrical portion 2D. It can hold. Thereby, the spring back after crushing container 1D to the axial direction can be prevented effectively.

  Further, according to the container 1D of the present embodiment, the lower middle ring portion 16D can be disposed inside the upper middle ring portion 15D in a state where the middle spiral structure cylindrical portion 30D is folded. Thereby, even if it is container 1D which has three or more helical structure cylinder parts 6, container 1D can be crushed further smaller.

Third Embodiment
Next, a third embodiment of the present invention will be described with reference to FIGS. 12 and 13, focusing on differences from the first embodiment.

  As shown in FIG. 12, the container 1 </ b> E of the present embodiment includes a main body cylindrical portion 2 </ b> E as in the first embodiment. Moreover, the container 1E of this embodiment is equipped with the container bottom part 3 and the container opening part 4 similar to 1st embodiment.

As in the first embodiment, the main body cylindrical portion 2E of the present embodiment includes a plurality of ring portions 5 and a spiral structure cylindrical portion 6.
The shape of the ring portion 5 viewed from the axial direction may be similar to that of the first embodiment. The number of ring portions 5 may be at least two or more, but is four in the present embodiment. The four ring portions 5 may be arranged at equal intervals or unequal intervals in the axial direction of the main cylindrical portion 2E. In the following description, the two ring portions 5 located at both axial ends of the main cylindrical portion 2E are referred to as end ring portions 11 and 12, and the two ring portions 5 located between the two end ring portions 11 and 12 May be referred to as mid-ring units 15E and 16E.

  Each ring portion 5 has higher strength in the axial direction than the helical tube 6 as in the first embodiment. The method for enhancing the strength of the ring portion 5 may be the concavo-convex structure portion 14 (see FIG. 2) or the like similar to the first embodiment.

  The radial dimensions of the four ring parts 5 may, for example, be different from one another. Further, only the diameter dimensions of some of the four ring portions 5 may be different from each other. In the present embodiment, the diameter dimensions of the four ring portions 5 are equal to one another.

  The main tube portion 2E of the present embodiment includes three helical structure tube portions 6 (upper helical structure tube portion 31E, middle portion helical structure tube portion 32E, and lower helical structure tube portion 33E). The main structure of each helical structure cylinder part 6 is the same as that of 1st embodiment. The upper helical structure cylindrical portion 31E is disposed between the upper end ring portion 11 and the upper middle ring portion 15E. The lower helical structure cylinder 33E is disposed between the lower end ring 12 and the lower middle ring 16E. The middle helical structure cylinder 32E is disposed between the upper middle ring 15E and the lower middle ring 16E. The three helical structure cylinder parts 6 exhibit the same inverted helical structure as the first embodiment.

  As shown in FIGS. 12 and 13, the helical tube 6 of the present embodiment has an annular flexible portion 35. The annular flexible portion 35 functions as a portion where the helical tube 6 bends radially inward when the helical tube 6 is folded.

  The annular easily bendable portion 35 is formed in an annular shape extending in the circumferential direction at a middle portion in the axial direction of the helical structure cylindrical portion 6. That is, the annular easily bendable portion 35 may be formed at a position apart from the two ring portions 5 positioned on both sides of the helical tube 6 at least in the axial direction. For example, the plurality of annular easily bendable portions 35 may be formed to be aligned in the axial direction in the same helical structure cylindrical portion 6, but it is more preferable to form only one in the same helical structure cylindrical portion 6.

  For example, when the diameter dimensions of the two ring portions 5 positioned on both sides of the helical structure cylinder 6 are approximately equal, the annular easily bendable portion 35 is formed substantially at the center (middle portion) of the helical structure cylinder 6 in the axial direction. Is preferred. In addition, when the diameter dimensions of the two ring portions 5 positioned on both sides of the helical structure cylinder 6 are substantially different, the annular easily bendable portion 35 is a helical structure cylinder having the smallest diameter of the helical structure cylinder 6 in the axial direction. Preferably, it is formed at 6 sites. Here, "the diameter of the helical structure tube portion 6" means, for example, the diameter of the inscribed circle of a plurality of diagonal straight lines 24 (valley fold lines) constituting the helical structure tube portion 6.

The annular easily bendable portion 35 may be included in at least one of the three helical structure cylindrical portions 6, but in the present embodiment, all (three) helical structure cylindrical portions 6 are included. The formation positions of the annular easily bendable portions 35 in the axial direction may be different from one another or may be equal to one another among the three helical structure tubular portions 6.
In the present embodiment, the annular easily bendable portion 35 has a substantially central portion (middle portion) in the axial direction of the upper helical structure cylindrical portion 31E, that is, an equal distance from the upper end ring portion 11 and the upper middle ring portion 15E in the axial direction. It is formed in position. Further, the annular easily bendable portion 35 is a position where the axial direction of the intermediate portion helical structure cylindrical portion 32E is approximately the center (middle portion), that is, the positions from the upper middle ring portion 15E and the lower middle ring portion 16E in the axial direction are substantially equal Is formed. In addition, the annular easily bendable portion 35 is a substantially central portion (middle portion) in the axial direction of the lower helical structure cylindrical portion 33E, that is, a position in which the distance from the lower end ring portion 12 and the lower middle ring portion 16E is approximately equal Is formed.

  The shape of the annular flexible portion 35 may be arbitrary. The annular easily bendable portion 35 has, for example, a shape in which the cross section of the annular easily bendable portion 35 including the axis A1 is a curve or unevenness similarly to the uneven structure portion 14 of the ring portion 5 (for example, U-shaped in cross section, V-shaped in cross section, It may be formed into an S-shaped cross section, a concave shape, a convex shape, a concavo-convex shape, etc. Further, the annular flexible portion 35 may be formed into, for example, a mountain fold line or a valley fold line when viewed from the outside of the container 1E. The annular flexible portion 35 of the present embodiment is formed in a concave shape that is recessed inside the container 1E when viewed from the outside of the container 1E.

The annular flexible portion 35 may be formed, for example, to extend continuously in the circumferential direction, but in the present embodiment, it is formed to extend intermittently in the circumferential direction. That is, the annular easy bending portion 35 of the present embodiment is configured by arranging the plurality of bending portion elements 36 in the circumferential direction. In the present embodiment, each bending portion element 36 is formed in a concave shape that is recessed inside the container 1E.
The plurality of bending portion elements 36 may be arranged without spacing in the circumferential direction, but in the present embodiment, they are arranged with spacing in the circumferential direction. The spacing between the circumferentially adjacent bending elements 36 may be arbitrary.

  The bending element 36 is, for example, only a part of plate-like parts 27 and 28 among a plurality of plate-like parts 27 and 28 constituting the helical structure cylinder 6 (for example, only the first plate-like part 27, a second plate-like part 28)). The bending portion element 36 of the present embodiment is formed on all plate-like parts 27 and 28 which constitute the helical tube 6.

  One bending element 36 may be formed, for example, in one plate-like part 27, 28. In addition, one bending portion element 36 may be formed, for example, over three or more plate-like parts 27 and 28 arranged continuously in the circumferential direction. Moreover, one bending part element 36 may be formed, for example, on the first plate-like part 27 and the second plate-like part 28 located on both sides of the diagonal straight line 24 (valley fold line). In the present embodiment, one bending portion element 36 is formed on the first plate-like part 27 and the second plate-like part 28 located on both sides of the inclined straight line 23 (crest folding line).

  One bending element 36 may extend, for example, in the circumferential direction of the helical tube 6. In the present embodiment, one bending element 36 extends obliquely in the axial direction of the helical tube 6 with respect to the circumferential direction. Concretely, the bending part element 36 of this embodiment is extended in the direction orthogonal to the inclination straight line 23 along the surface of the plate-like parts 27 and 28. The bending element 36 also extends from the midpoint of the inclined straight line 23 to two diagonal straight lines 24 located on both sides of the diagonal straight line 24.

  The width dimension of the above-mentioned annular easy bending part 35 or the bending part element 36 may be arbitrarily set within the range where the annular easy bending part 35 functions, for example, the ring part 5 in the axial direction of the container 1E It may be larger or smaller than the width dimension of 14). In the present embodiment, the width dimension of the annular easily bendable portion 35 and the bend portion element 36 is equal to the width dimension of the ring portion 5. The above-mentioned “width dimension of the annular easy bending portion 35 and the bending portion element 36” is, for example, a bending portion element along the dimension of the annular easy bending portion 35 in the axial direction of the container 1E or the plane of the plate parts 27 and 28 The dimension of the bending element 36 in the direction orthogonal to the extension direction of 36 (for example, the direction parallel to the inclined straight line 23) is meant.

  The shape and configuration of the above-mentioned annular flexible portion 35 may be different from each other among the three helical structure cylindrical portions 6 or may be equal to each other.

  The main body cylindrical portion 2E of the present embodiment includes the insertion cylindrical portion 7 similar to that of the first embodiment. The insertion cylindrical portion 7 of the present embodiment is only the upper insertion cylindrical portion 41 similar to the first embodiment, and does not include the lower insertion cylindrical portion 42 (see FIG. 1) of the first embodiment. However, in the container 1E of the present embodiment, for example, a part or all of the container bottom 3 may function as the lower insertion cylindrical portion 42 similar to the first embodiment.

The container 1E of this embodiment can be crushed to a small size by the same folding method as the first embodiment.
That is, in the case of folding the container 1E of the present embodiment, it is sufficient to twist each helical structure cylinder 6 as in the first embodiment. For example, when twisting the middle helical structure cylinder 32E, the upper middle ring 15E with respect to the lower middle ring 16E in a plan view when the middle helical structure cylinder 32E is viewed from the container opening 4 side. Just rotate it clockwise. The upper helical structure cylinder part 31E and the lower helical structure cylinder part 33E may be twisted in the opposite direction to the intermediate part helical structure cylinder part 32E.

When the upper helical structure cylindrical portion 31E is twisted and folded, as in the first embodiment, a portion of the upper helical structure cylindrical portion 31E is formed inside the upper end ring portion 11 and / or the upper middle ring portion 15E. The upper insertion tube portion 41 can be inserted.
Furthermore, in the present embodiment, when the upper helical structure cylinder 31E is folded, the annular easily bendable portion 35 of the upper helical structure cylinder 31E plays a role like a fold formed in advance, and the upper helical structure cylinder 31E is It bends easily and reliably radially inward at the axially midway portion. As a result, it is possible to stabilize the state in which a part of the upper spiral structure cylindrical portion 31E has entered the inside of the upper end ring portion 11 or the upper insertion cylindrical portion 41.

When the intermediate portion helical structure cylindrical portion 32E is twisted and folded, a portion of the intermediate portion helical structure cylindrical portion 32E is formed on the upper middle ring portion 15E and / or the lower side as in the case of the upper helical structure cylindrical portion 31E. It can be made to enter inside the halfway ring part 16E.
Furthermore, in the present embodiment, when folding the intermediate portion helical structure cylindrical portion 32E, the annular easily bendable portion 35 of the intermediate portion helical structure cylindrical portion 32E plays a role like a fold formed in advance, and the intermediate portion helical structure cylinder The portion 32E is easily and surely bent radially inward at the axially intermediate portion. As a result, it is possible to stabilize a state in which a part of the intermediate portion helical structure cylindrical portion 32E enters the inside of the upper middle ring portion 15E and / or the lower middle ring portion 16E.
Further, the axially upper portion of the intermediate helical structure cylindrical portion 32E bordering on the annular easily bendable portion 35 enters the inside of the upper middle ring portion 15E, and the intermediate portion bordering on the annular easily bendable portion 35 The axially lower portion of the helical tube portion 32E can be in a state in which it enters into the lower middle ring portion 16E, and these states can be stabilized.

When the lower helical structure tubular portion 33E is twisted and folded, as in the first embodiment, a part of the lower helical structure tubular portion 33E is replaced with the lower middle ring portion 16E and / or the lower end ring portion 12 Or the bottom of the container 3.
Furthermore, in the present embodiment, when the lower helical structure cylinder 33E is folded, the annular easily bendable portion 35 of the lower helical structure cylinder 33E plays a role like a fold formed in advance, and the lower helical structure cylinder 33E is It bends easily and reliably radially inward at the axially midway portion. As a result, it is possible to stabilize a state in which a part of the lower spiral structure cylindrical portion 33E that has been folded into the inside of the lower middle ring portion 16E and / or the lower end ring portion 12 and the container bottom 3.

According to the container 1E of this embodiment, the same effect as that of the first embodiment can be obtained.
Furthermore, according to the container 1E of the present embodiment, when folding the helical structure cylinder 6, the annular flexible portion 35 plays a role like a fold to stabilize the folding process, and at the same time, the helical structure 6 After being folded, it is possible to stabilize the state in which a part of the folded helical structure cylinder 6 enters the ring 5, the insertion cylinder 7 (especially the upper insertion cylinder 41) and the container bottom 3. Thereby, the spring back after crushing container 1E to the axial direction can be prevented effectively.

  The configuration (for example, the annular flexible portion 35) of the third embodiment is also applicable to, for example, the container 1D of the second embodiment.

  As mentioned above, although the present invention was explained in detail by three embodiments, the present invention is not limited to the above-mentioned embodiment, and it is possible to add various change in the range which does not deviate from the meaning of the present invention.

In the container of the present invention, for example, as shown in FIG. 14, the inclined straight lines 23 of the two axially adjacent helical structure cylindrical portions 6 may be inclined in the same direction with respect to the axial direction. That is, two helical structure cylinder parts 6 which adjoin axial direction may exhibit the forward spiral structure which the inclination straight line 23 inclines in the same direction with respect to an axial direction. Although the container 1F illustrated in FIG. 14 has two helical structure cylinder parts 6 like the container 1 of the first embodiment, for example, three or more like the containers 1D and 1E of the second and third embodiments. The helical tube portion 6 may be provided.
In the container 1F exhibiting a forward spiral structure, the plurality of spiral structure cylindrical portions 6 can be simultaneously folded only by relatively rotating the two end ring portions 11 and 12. Therefore, it is possible to easily crush the container 1F.

  In the container of the present invention, the ring portion whose strength is higher than that of the helical structure cylindrical portion may be only the ring portion into which the helical structure cylindrical portion folded at least inside the main body cylindrical portion 2 enters.

1, 1D, 1E, 1F Containers 2, 2D, 2E Body cylindrical part 3 Container bottom 4 Container opening 5 Ring part 6 Helical structure cylindrical part 7 Insertion cylindrical part 11, 12 End ring part 13, 15D, 16D, 15E, 16E Midway ring portion 23 Inclined straight line 24 Diagonal straight line 25 and 26 Connecting line 35 Annular easily bendable part 36 Bendable part element A1 Axis line

Claims (12)

A container comprising a cylindrical main body cylindrical portion, wherein
The main body cylindrical portion is annularly formed, and is disposed between a plurality of ring portions spaced apart in the axial direction of the main body cylindrical portion and two ring portions adjacent in the axial direction, And a helical structure tube portion in which the two ring portions are folded so as to approach each other in the axial direction by relatively rotating the two ring portions around the axis of the main body tube portion,
The helical tube portion extends in a circumferential direction with respect to the axial direction so as to connect the two ring portions, and is a mountain fold line when viewed from the outside of the container, and the circumferential direction is substantially equally spaced. The diagonals of the quadrilateral defined by a plurality of inclined straight lines arranged in the two, the two inclined straight lines adjacent in the circumferential direction, and a connecting line between the helical tube portion and the two ring portions are A plurality of diagonal straight lines extending obliquely at an angle larger than the straight line with respect to the axial direction so as to connect, and viewed from the outside of the container as valley fold lines;
The helical tube portion is folded so that at least a portion of the tubular portion enters inside of any one of the ring portions,
The twist angle from one end of the inclined straight line to the other end of the inclined straight line in the circumferential direction of the helical structure tube portion defines the radius of the first ring portion of the two ring portions as r and the radius of the second ring portion as R. wherein the number of the inclined straight lines is n, the length of the helical structure tube portion in the axial direction h, is torsion angle theta ₀ or more, which is defined by the following equation container.

  The container according to claim 1, wherein the two ring portions have higher strength in the axial direction than the helical tube portion.   The helical structure cylindrical portion is formed in an annular shape extending in the circumferential direction at a midway portion in the axial direction of the helical structure cylindrical portion, and has an annular easy bending portion which bends radially inward when the helical structure cylindrical portion is folded. The container of Claim 1 or Claim 2. The diameter of the first ring portion is smaller than the diameter of the second ring portion,
4. The helical structure cylinder portion according to claim 1, wherein the first ring portion is disposed inside the second ring portion or folded so as to pass through the inside of the second ring portion. The container described in the section.   5. The container according to claim 4, wherein the diameter of the two ring portions is set such that the first ring portion fits inside the second ring portion.   The main tube portion is formed at a position adjacent to the second ring portion on the opposite side to the helical structure tube portion in the axial direction, and an insertion tube portion into which at least the folded helical structure tube portion is inserted The container according to any one of claims 1 to 5, comprising:   The container according to claim 6, wherein the insertion tube has a higher strength in the axial direction than the helical tube. At least three of the ring portion,
The diameter dimension of two end ring portions positioned at both ends in the axial direction among the plurality of ring portions is larger than the diameter dimension of the midway ring portion positioned between the two end ring portions,
The container according to any one of claims 1 to 7, wherein a diameter dimension of one end ring portion of the two end ring portions is smaller than a diameter dimension of the other end ring portion.   The container according to claim 8, wherein the diameter dimension of the one end ring portion and the other end ring portion is set such that the one end ring portion fits inside the other end ring portion. At least two of the middle ring portions are arranged at intervals in the axial direction,
One of the two midway ring portions adjacent in the axial direction is formed into a tubular shape in which the one half ring portion located between the two midway ring portions and the other midway ring portion is folded by being folded. The container according to claim 8 or 9.   The container according to any one of claims 8 to 10, wherein the inclined straight lines of the two axially adjacent helical structure cylindrical portions are inclined in opposite directions with respect to the axis line.   The container according to any one of claims 8 to 10, wherein the inclined straight lines of the two axially adjacent helical structure cylindrical portions are inclined in the same direction with respect to the axis line.

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