JP2017019520A - Resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin container capable of retaining a state that an empty resin container of any length is crushed and becomes small.SOLUTION: A resin container 10 which has a nearly tubular shape or a nearly polygonal pillar shape, includes a drinking mouth part on one end in a central axis direction, and includes a closed bottom on the other end includes: a recess 13 provided in a circular or arc shape with an intersection between a central axis and a plain surface as the center, on a plain surface vertical to the central axis, in the inside of one end vicinity in the central axis direction of the container; and a projection 16 provided in a circular or arc shape with an intersection between the central axis and the plain surface as the center, on a plain surface vertical to the central axis, in the inside of one end vicinity on the central axis direction opposite side to the recess of the container, and engaged with the recess by vertically crushing the container. Since it is possible to retain a state that the container of any length is crushed to reduce a volume, efficiency in preservation and transportation of empty bottles can be achieved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin container, and more particularly to a resin container capable of maintaining a state in which the empty container is crushed to reduce its volume.

  Conventionally, various structures for crushing resin containers such as plastic bottles to reduce the volume have been proposed. For example, Patent Document 1 below discloses a foldable plastic bottle. This plastic bottle is provided with a folding rib with straight irregularities at the center of the side surface of the trunk, and is molded easily by crushing both ends into a Y-shape. By folding the bottle, the bottle can be folded in a compact manner by the depression for fitting the mouth so that the mouth is fitted to the bottom of the bottle.

JP 2014-105024 A

  In the resin container as described above, in order to fold and fit the bottom portion and the drinking mouth portion, a certain length or more is required in the central axis direction of the bottle, and it cannot be performed with a short (low) bottle. There was a problem. Further, since it is only flattened and rounded about half a half, especially when the length is too long, there is a problem that a wasteful space is formed inside, and the capacity is not reduced too much.

  The object of the present invention is to solve the above-mentioned conventional problems, and to maintain a state in which the volume is reduced by crushing an empty resin container regardless of the length of the container. The object is to provide a resin container.

  The resin container according to the present invention has a substantially cylindrical shape or a substantially polygonal column shape, a resin container having a drinking mouth part at one end in the central axis direction and a closed bottom part at the other end. A recess provided in a circular shape or an arc shape centering on an intersection of the central axis and the plane on a plane perpendicular to the central axis inside the vicinity of one end or the other end in the axial direction, Provided in the vicinity of the end opposite to the central axis direction of the concave portion of the container in a circular or arc shape centering on the intersection of the central axis and the plane on a plane perpendicular to the central axis And a convex part that fits into the concave part by crushing the container up and down.

  Further, in the above-mentioned resin container, the concave portion is provided in either the vicinity of the boundary between the drinking mouth portion and the shoulder portion of the container or the boundary between the shoulder portion and the trunk portion, and the convex portion is provided in the container. It is also characterized in that it is provided at either the bottom or near the boundary between the bottom and the trunk.

  Further, the resin container of the present invention is a substantially cylindrical shape or a substantially polygonal column shape, the resin container having a drinking mouth part at one end in the central axis direction and a closed bottom part at the other end. A cylindrical hole provided in the mouth, and a cylindrical or polygonal column-shaped protrusion provided in the center of the bottom and fitted into the cylindrical hole by crushing the container up and down This is the main feature.

  Further, the above-described resin container is characterized in that the protrusion has a tapered shape that becomes thinner in the central axis direction. Further, in the above-described resin container, a ring-shaped convex portion is further provided at the lower end of the cylindrical hole of the mouthpiece portion, and a ring-shaped convex portion is also provided at the upper end of the protrusion provided at the bottom portion. There is also a feature.

  Further, the resin container of the present invention has a substantially cylindrical shape or a substantially polygonal column shape, and includes a drinking mouth part at one end in the central axis direction and a bottom part closed at the other end. Is provided with a frustoconical or polygonal frustum-shaped shoulder, and an inner surface in the vicinity of the lower end of the body portion is provided with a ring-shaped convex portion that fits the shoulder by crushing the container up and down. And

Further, the resin container of the present invention has a substantially cylindrical shape or a substantially polygonal column shape, a resin container having a drinking mouth part at one end in the central axis direction and a closed bottom part at the other end. A main feature is that an inner surface near the upper end is provided with a ring-shaped convex portion that fits the bottom portion by crushing the container up and down.
Further, the above-described resin container is characterized in that a plurality of ring-shaped or spiral grooves or convex portions are provided in the body portion.

The present invention has the following effects.
(1) Since any container of any length can be crushed and kept in a reduced volume state, it is possible to save space and improve efficiency during storage and transportation of empty bottles.
(2) Since the fitted state can be maintained, a sense of accomplishment that the bottle has been crushed can be obtained.
(3) The strength and rigidity of the bottle can be maintained in the same manner as in the prior art, and can be manufactured by the same manufacturing method as in the prior art, and the manufacture is easy.

FIG. 1 is a cross-sectional view showing the configuration of Example 1 of the resin container of the present invention. FIG. 2 is a cross-sectional view showing the crushed state of Example 1 of the resin container of the present invention. FIG. 3 is a cross-sectional view showing the configuration of Example 2 of the resin container of the present invention. FIG. 4 is a sectional view showing a crushed state of Example 2 of the resin container of the present invention. FIG. 5 is a cross-sectional view showing the configuration of Example 3 of the resin container of the present invention. FIG. 6 is a sectional view showing a crushed state of Example 3 of the resin container of the present invention. FIG. 7 is a cross-sectional view showing a modification of the main part of the resin container of Example 3 of the present invention. FIG. 8 is a front view showing a modification of the body portion in the first embodiment of the resin container of the present invention. FIG. 9 is a cross-sectional view showing the configuration of Examples 4 and 5 of the resin container of the present invention. FIG. 10 is a sectional view showing the crushed state of Examples 4 and 5 of the resin container of the present invention.

  Embodiments will be described below with reference to the drawings. In addition, although an Example demonstrates a plastic bottle, this invention is applicable to arbitrary resin-made containers.

  FIG. 1 is a cross-sectional view showing the configuration of Example 1 of the resin container of the present invention. Moreover, FIG. 2 is sectional drawing which shows the crushed state of Example 1 of the resin-made containers of this invention. In addition, each part of the substantially cylindrical or substantially polygonal-pillar-shaped PET bottle 10 in an upright state is shown in the top of FIG. 1, the part of the drinking mouth part 11 is the head, and the truncated cone connecting the drinking mouth part 11 and the trunk part or The polygonal frustum-shaped part is referred to as a shoulder, the cylindrical or polygonal column-shaped part is referred to as a trunk, and the lower end of the trunk is referred to as a bottom.

  The difference between the PET bottle of Example 1 and the conventional PET bottle is that a shoulder ring-shaped recess 13 is provided in the shoulder, and the bottom portion that fits the shoulder ring-shaped recess 13 in the center of the closed bottom. The projection 15 provided with the ring-shaped convex part 16 is provided.

  As shown in a cross section in FIG. 1, the shoulder ring-shaped concave portion 13 is more than the ring-shaped concave portion provided on the inner surface of the shoulder portion, that is, the drinking mouth portion 11 and the shoulder ring-shaped convex portion 12 on both sides of the concave portion. It is a ring-shaped groove having a long distance from the central axis. The outer periphery (inner surface of the container) of the ring-shaped shoulder ring-shaped convex portion 12 provided at the lower portion of the shoulder ring-shaped concave portion 13 is a curved surface without corners. The shoulder ring-shaped recess 13 has a circular shape (or an arc shape) centered on the intersection of the central axis and the plane on a plane perpendicular to the central axis in the vicinity of one end in the central axis direction of the container. This corresponds to the provided recess.

  The bottom protrusion 15 is a substantially cylindrical or frustoconical protrusion provided at the center of the closed bottom inner surface, and a ring-shaped bottom ring-shaped convex portion 16 is provided at the upper end of the bottom protrusion 15. The outer periphery of the bottom ring-shaped convex portion 16 is a curved surface having no corners.

  The diameter of the bottom ring-shaped convex portion 16 is larger than the diameter of the shoulder ring-shaped convex portion 12 and smaller than the diameter of the shoulder ring-shaped concave portion 13. Accordingly, when the body portion of the plastic bottle 10 is crushed up and down and the bottom ring-shaped convex portion 16 is pushed into the shoulder ring-shaped concave portion 13, the bottom ring-shaped convex portion 16 and the shoulder ring-shaped concave portion 13, as shown in FIG. Are fitted and maintained in a crushed state. The bottom ring-shaped convex part 16 is centered on the intersection of the central axis and the plane on the plane perpendicular to the central axis, in the vicinity of the end opposite to the shoulder ring-shaped concave part 13 of the container. It corresponds to the convex part which fits with the shoulder part ring-shaped recessed part 13 by crushing the container 10 up and down.

  When crushing, the ring-shaped shoulder groove 17 provided in the shoulder and the ring-shaped trunk groove 18 provided in the vicinity of the upper end of the trunk portion of the drinking mouth part 11 and the trunk part which crushed the shoulder part are used. It becomes easy to push inside. These grooves are applicable to other embodiments.

  In recent years, the thickness of PET bottles has been reduced to such an extent that it can be easily crushed by hand. If it is thin, it is not so difficult to crush as shown in FIG. Moreover, although the thickness of the shoulder part ring-shaped recessed part 13 and the bottom part ring-shaped convex part 16 may be the same as another part, you may make only this part thicker than another part.

  FIG. 8 is a front view showing a modification of the body portion in the first embodiment of the resin container of the present invention. As shown in FIG. 2, in order to fit the bottom ring-shaped convex portion 16 and the shoulder ring-shaped concave portion 13, it is necessary to crush so that a space is formed around the trunk of the plastic bottle. Moreover, it is preferable that it can be crushed with a smaller force. Therefore, (a) a ring-shaped or (b) spiral groove 51 or protrusion 50 is provided on the side surface of the body portion.

  In this way, the body portion can be crushed into a bellows shape or a spiral shape at equal intervals with a smaller force. Note that (b) in the case of the spiral groove 51, the upper and lower sides of the PET bottle are twisted to be crushed in a spiral shape with a smaller force, so that it is easy to be crushed.

  Also, the circumference of the body is divided into four or more even parts, and grooves or protrusions are provided horizontally at equal intervals in the respective sections. You may make it shift | deviate by 1/2. If it does in this way, it will become easy to collapse into a bellows shape.

  FIG. 3 is a cross-sectional view showing the configuration of Example 2 of the resin container of the present invention. FIG. 4 is a cross-sectional view showing the crushed state of Example 2 of the resin container of the present invention. In the first embodiment, the shoulder ring-shaped recess 13 for fitting to the shoulder portion is provided, but in the second embodiment, the cylindrical inner space (hole) of the drinking mouth portion 11 is used for fitting. It is.

  In the second embodiment, the drinking mouth portion 11 has the same cylindrical hole as the conventional structure, and in order to easily crush the PET bottle, a ring-shaped shoulder groove 17 is provided in the vicinity of the shoulder portion and the upper end of the trunk portion. A plurality of trunk grooves 18 are provided.

  On the inner side of the center of the bottom portion, there is provided a projection 20 having a square column shape with rounded corners as shown on the right side of FIG. Then, when the protrusion 20 is pushed into the drinking mouth portion 11, the protrusion 20 is elastically deformed and inserted into the drinking mouth portion 11, and in order to maintain a fitted state without slipping out due to friction, The length of the diagonal line is made slightly larger than the inner diameter of the drinking mouth 11 of the head.

  In order to increase the frictional force, a large number of fine protrusions may be provided on one or both of the outer surface of the protrusion 20 and the inner surface of the drinking mouth portion 11. Moreover, it is good also as a taper shape in which the length of the diagonal of the cross section of a square pole becomes short, so that the shape of the protrusion 20 goes up.

  The cross-sectional shape of the protrusion 20 is such that when the protrusion 20 is pushed into the drinking mouth portion 11 when it is a cylinder, the air inside does not escape, so that a passage for air is ensured even when pushed. The shape may be, for example, a polygon having three or more rounded corners, or a circle having one or more cuts.

  FIG. 5 is a cross-sectional view showing the configuration of Example 3 of the resin container of the present invention. Moreover, FIG. 6 is sectional drawing which shows the crushed state of Example 3 of the resin-made containers of this invention. In the third embodiment, ring-shaped convex portions 30 and 32 are further provided on the inner side surface of the drinking mouth portion 11 and the upper end of the bottom projection 31 in the configuration of the second embodiment.

  In the third embodiment, the ring-shaped convex portion 30 is provided at the lower end of the cylindrical inner side surface of the drinking mouth portion 11, and the ring-shaped convex portion 32 is also provided at the upper end of the bottom protrusion 31. The inner diameter of the ring-shaped convex part 30 of the drinking mouth part 11 is made slightly smaller than the outer diameter of the ring-shaped convex part 32 at the bottom. And as shown in FIG. 6, by pressing the ring-shaped convex part 32 of a bottom part into the inside of the drinking mouth part 11, convex parts engage and a fitting state is maintained.

  FIG. 7 is a cross-sectional view showing a modification of the main part of the resin container of Example 3 of the present invention. FIG. 7A shows the configuration of the third embodiment shown in FIGS. 5 and 6, in which the bottom protrusion 31 is cylindrical and the ring-shaped protrusion 32 is provided over the entire circumference.

  In FIG. 7B, the convex portions 40 and 41 are partially provided at a plurality (four in FIG. 7) at the same vertical position instead of the entire circumference. Moreover, the vertical cross section of each convex part is a right-angled triangle, and each inclined surface faces each other, and when it crushes, it forms so that each inclined surface may contact | abut. And after the convex part 40 of the drinking mouth part 11 and the convex part 41 of a bottom part protrusion fit, each other convex part will be hooked in a plane perpendicular | vertical to a central axis, and it becomes difficult to remove | deviate.

  FIG. 7C shows a case where a plurality of convex portions 43 and 44 are partially provided at the same vertical position. Each of the convex portions 43 and 44 has a right triangular plate shape having a predetermined thickness when viewed from the horizontal direction. The respective convex portions 43 and 44 are formed in such a direction that the inclined surfaces face each other and are brought into contact with each other when crushed. Then, when the bottom protrusion is pushed into the drinking mouth part 11, the convex part is not elastically deformed, but the crushed body part is slightly twisted so that the convex parts 43 and 44 are fitted to each other. Can be fitted. Further, after the fitting, the convex portions are caught on a plane perpendicular to the central axis, and are difficult to come off.

  FIG. 9 is a cross-sectional view showing the configuration of Example 4 of the resin container of the present invention. Moreover, FIG. 10 is sectional drawing which shows the state which Example 4 of the resin-made containers of this invention crushed. In Example 4a of FIG. 9A, the entire bottom portion 60 of the PET bottle 10 is used for fitting. For this purpose, a barrel upper ring-shaped convex portion 61 is provided on the inner surface near the upper end of the barrel portion of the PET bottle 10. When crushing the bottle, by crushing the bottle up and down until the bottom 60 enters the trunk upper ring-shaped convex portion 61, the bottom 60 and the trunk upper ring-shaped convex portion 61 are engaged and fitted. To maintain. The bottom portion 60 may be thicker than other portions, or radial grooves may be provided to increase the rigidity of the bottom portion 60.

  In Example 4b in FIG. 9B, the entire shoulder portion 70 of the plastic bottle 10 is used for fitting. For this purpose, a trunk part lower ring-shaped convex part 72 is provided on the inner surface near the lower end of the trunk part of the plastic bottle 10. When crushing the bottle, by crushing the bottle up and down until the shoulder part 70 enters the lower ring-shaped convex part 72 of the trunk part, the shoulder part 70 and the lower ring-shaped convex part 72 of the trunk part are engaged and fitted. Maintain a consistent state. The shoulder 70 may be thicker than the other parts, or radial grooves may be provided to increase the rigidity of the shoulder 70. A ring-shaped groove 71 may be provided in the vicinity of the boundary between the shoulder portion and the trunk portion so that the shoulder portion can be easily folded inward.

  The present invention can be applied to any resin container.

DESCRIPTION OF SYMBOLS 10 ... Bottle 11 ... Mouth part 12 ... Shoulder ring-shaped convex part 13 ... Shoulder ring-shaped concave part 15 ... Bottom protrusion 16 ... Bottom ring-shaped convex part 17 ... Shoulder groove 18 ... Trunk groove

Claims (8)

In a resin container having a substantially cylindrical shape or a substantially polygonal column shape, having a drinking mouth part at one end in the central axis direction, and a closed bottom part at the other end,
Provided in the vicinity of one end or the other end in the direction of the central axis of the container in a circular or arc shape centered on the intersection of the central axis and the plane on a plane perpendicular to the central axis. A recess,
Provided in the vicinity of the end opposite to the central axis direction of the concave portion of the container in a circular or arc shape centering on the intersection of the central axis and the plane on a plane perpendicular to the central axis And a convex part that fits into the concave part by crushing the container up and down.   The concave portion is provided in the vicinity of the boundary between the drinking mouth portion and the shoulder portion of the container or in the vicinity of the boundary portion between the shoulder portion and the trunk portion, and the convex portion is near the boundary between the bottom portion of the container or the bottom portion and the trunk portion. The resin container according to claim 1, wherein the resin container is provided in any one of the above. In a resin container having a substantially cylindrical shape or a substantially polygonal column shape, having a drinking mouth part at one end in the central axis direction, and a closed bottom part at the other end,
A cylindrical hole provided in the mouthpiece,
A resin container comprising a cylindrical or polygonal column-shaped protrusion provided at the center of the bottom and fitted into the cylindrical hole by crushing the container up and down.   4. The resin container according to claim 3, wherein the protrusion has a tapered shape that becomes thinner in the center axis direction.   The ring-shaped convex portion is further provided at the lower end of the cylindrical hole of the drinking mouth portion, and the ring-shaped convex portion is also provided at the upper end of the projection provided at the bottom portion. The resin container according to 1. In a resin container having a substantially cylindrical shape or a substantially polygonal column shape, having a drinking mouth part at one end in the central axis direction, and a closed bottom part at the other end,
The container has a frustoconical or polygonal frustum shoulder;
A resin container characterized by comprising a ring-shaped convex part that fits the shoulder part by crushing the container up and down on the inner surface near the lower end of the body part. In a resin container having a substantially cylindrical shape or a substantially polygonal column shape, having a drinking mouth part at one end in the central axis direction, and a closed bottom part at the other end,
A resin container characterized by comprising a ring-shaped convex part that fits into the bottom part by crushing the container up and down on the inner surface near the upper end of the body part.   The resin container according to any one of claims 1 to 7, wherein a plurality of ring-shaped or spiral grooves or convex portions are provided in the body portion.

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