JP2007290736A - Synthetic resin-made packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thin-walled synthetic resin-made packaging container which absorbs a compressive force while a height is elastically changed when the compressive force acts, and can be elastically restored to its original shape without generating strain deformation. <P>SOLUTION: The lower part of a container body 1 is formed into a small-diameter body 2B having a number of vertical channels 5 on its peripheral wall, and the upper end of the small-diameter body 2B is continuously connected to the lower end of a large diameter body 2A through a flange 4 horizontally projecting outward. Horizontal channels 6 communicating with respective vertical channels 5 over inner and outer peripheral ends of the flange 4 are provided at small intervals on the flange 4. When a downward compressive force acts on the container body 1, the flange 4 can be bent downward while the compressive force is absorbed by elastically expanding and contracting channel widths of the horizontal channels 6 formed at the flange 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement in a thin synthetic resin packaging container for accommodating various small articles, foods and the like in a sealed state.

  Conventionally, a thin synthetic resin packaging container obtained by drawing a synthetic resin film such as polyethylene or polypropylene is subjected to a downward pressing force (hereinafter referred to as compression force) on the lid body. Since there is a possibility that the part will buckle and deform due to this compressive force, for example, as described in Patent Document 1, a large number of vertical hooks are formed on the trunk part to increase the compressive strength, and this If the vertical hook is formed up to the upper end opening, the annular peripheral wall projecting downward from the outer peripheral end of the lid body cannot be fitted into the upper end opening without a gap. A flat annular ring-shaped horizontal flange portion is formed from the upper end to the outer side, and an inner and outer peripheral surface on the outer peripheral end of the horizontal flange portion on which no vertical rods are formed forms a smooth upper end opening. And this top Packaging container which is configured so as to cover the lid member openably have been developed mouth.

Further, as described in Patent Document 2, a planar flange-shaped horizontal flange portion is formed at the center in the height direction of the trunk portion, and the lower half portion of the trunk portion is connected to the lower half portion via the horizontal flange portion. In the small-diameter trunk formed by forming a large number of vertical hooks in the same manner as the trunk described in Patent Document 1, the upper half is formed in a large-diameter trunk with a smooth inner and outer peripheral surface provided with no vertical hooks. A thin synthetic resin packaging container in which a lid is attached to the upper end opening of the large-diameter trunk so as to be freely opened and closed is also widely known.
JP 2003-212227 A Design Registration No. 815477

  However, in the thin synthetic resin packaging container described above, the horizontal flange portion is provided in order to exert a function of increasing the compressive strength of the entire container together with a number of vertical rods formed on the trunk portion. Thus, the cushioning action that absorbs the compressive force is hardly exerted. Therefore, when a load is applied in the compression direction and the horizontal flange portion is bent downward with the upper end of the body portion having the vertical flange as a fulcrum, the horizontal flange portion However, there is a risk that the entire container will be distorted and deformed to damage the contents of the container.

  Specifically, when a downward compressive force is applied to the upper end opening of the container, the outer diameter of the horizontal flange portion is refracted downward with the upper end of the body portion provided with the vertical flange portion as a fulcrum by this compressive force. Must be deformed to reduce the diameter, i.e., the circumferential length is short, but the horizontal flange is formed on a horizontally flat surface over the entire circumference. Unless this is done, it is difficult to make a large refractive deformation downward. In other words, when a downward compressive force is applied to the upper end opening of the container, the horizontal flange portion exerts a tensile action to hold it horizontally against the compressive force, and this tensile action causes the compressive strength. Is increasing.

  In this way, the horizontal flange portion exerts a tensioning action against the compressive force from above, but even if this compressive force is relatively small, the downward force acting on the outer peripheral end of the horizontal flange portion due to the compressive force is exerted. There is a problem that the horizontal flange portion becomes proportionally larger according to the width of the horizontal flange portion, the horizontal flange portion cannot withstand the compressive force, buckles into a wave shape as described above, and the entire container is deformed. Furthermore, although the compressive force acts on the outer peripheral end of the horizontal flange portion, the transmission of the compressive force from the horizontal flange portion to the trunk portion is reduced, and the compression resistance function due to the vertical shaft cannot be fully exhibited. Will also occur.

  The present invention has been made in view of such problems, and the object of the present invention is to change the height of the container elastically according to the magnitude of the compression force when the compression force is applied. An object of the present invention is to provide a thin synthetic resin packaging container that absorbs compressive force and prevents the deformation and deformation of the entire container.

  In order to achieve the above object, a synthetic resin packaging container according to the present invention, as described in claim 1, includes a container main body having a bottom portion integrally provided at the lower end of a body portion having an open upper end, and the container main body. A flat annular flange portion having a constant width over the entire circumference is formed at an intermediate portion in the height direction of the body portion, and the flange portion is formed by a lid body that is detachably placed on the upper end opening. The lower part of the body part is formed as a small diameter body part whose upper end is integrally connected to the inner peripheral end of the flange part, while the upper part of the body part is formed into a large diameter whose lower end is integrally connected to the outer peripheral end of the flange part. In the thin synthetic resin packaging container formed on the body part, a plurality of longitudinal grooves that can be elastically expanded and contracted in the width direction are formed in the small-diameter body part over the entire circumference, and at the flange part The horizontal groove reaching the outer peripheral edge of the flange portion from the upper end of each vertical groove is the groove width direction. And a resiliently collapsible bent form structure.

  In the synthetic resin packaging container configured as described above, the invention according to claim 2 is a longitudinal groove formed in the small-diameter barrel, and a flange portion in which an end on the inner peripheral side is continuous with an upper end of each longitudinal groove. The lateral grooves formed in the above are provided at small intervals in the circumferential direction.

  Furthermore, in the invention according to claim 3, the small-diameter body portion is formed in an inclined body portion whose diameter is increased from the bottom outer peripheral end toward the upper end, and the flange portion is horizontally formed from the inner peripheral end toward the outer peripheral end. It is formed in the horizontal flange part protrudingly provided in.

  According to the thin synthetic resin packaging container of the present invention, as described in claim 1, a planar annular flange portion having a constant width is formed at an intermediate portion in the height direction of the trunk portion, and the flange portion is formed. The lower part of the body part is formed as a small diameter body part whose upper end is integrally connected to the inner peripheral end of the flange part, while the upper part of the body part is formed into a large diameter whose lower end is integrally connected to the outer peripheral end of the flange part. In the thin synthetic resin packaging container formed on the body part, a plurality of longitudinal grooves that can be elastically expanded and contracted in the width direction are formed in the small-diameter body part over the entire circumference, and at the flange part The lateral groove reaching the outer peripheral end of the flange portion from the upper end of each vertical groove is bent so as to be elastically expandable / contractible in the groove width direction, so that the body portion is compressed into the upper end opening of the large diameter body portion. If a force is applied in the direction to be The flange portion can be refracted smoothly and reliably downward while elastically expanding and contracting a large number of lateral grooves in the groove width direction to reduce and expand the outer diameter and inner diameter of the flange portion. The elastic refraction of the flange portion can absorb the compressive force and prevent the barrel portion of the container from being distorted or buckled.

  Furthermore, when a large compressive force acts and the flange portion is greatly refracted downward from the upper end of the small-diameter barrel portion, and no further refracting is possible, the compressive force acting on the refracted flange portion is reduced. The entire upper end of the small-diameter barrel connected to the peripheral end can act as a downward pressing force, and the compression force is firmly received by the numerous vertical grooves provided in the small-diameter barrel. Thus, the body portion can be strongly prevented from being distorted or buckled. In addition, the refractive index of the flange portion changes elastically depending on the magnitude of the compressive force, so that an excellent buffering effect can be achieved, and when the compressive force is released, the entire container is smoothly elastically restored to its original form. The contents contained in the container can be adversely affected.

  A large number of vertical grooves provided in the small-diameter body and a large number of horizontal grooves provided in a flange portion that is continuously refracted outward from the upper end of each vertical groove are continuously formed in a bowl shape in the circumferential direction. However, the invention according to claim 2 includes a longitudinal groove formed in the small-diameter body portion, and a transverse groove formed in a flange portion in which the end portion on the inner peripheral side is continuous with the upper end of each longitudinal groove. , Provided at small intervals in the circumferential direction. Since it comprised in this way, when compressive force acts on the cover body side of a container, the upper end of the narrow body wall part between the longitudinal grooves adjacent to the peripheral direction in a small diameter body part is used as a fulcrum from each upper end of each body wall part. The flange surface portion between the lateral grooves adjacent in the circumferential direction in the flange portion that is refracted outward can be smoothly refracted downward while the longitudinal groove and the lateral groove are elastically expanded and contracted in the groove width direction. A good buffering function can be exhibited.

  The small-diameter body portion may be formed to have the same diameter over the entire length, and the flange portion projecting outward from the upper end of the small-diameter body opening from the inner peripheral end side to the outer peripheral end. Even if it is inclined obliquely upward, the buffering function is exhibited while elastically expanding and contracting the longitudinal and lateral grooves provided in the small-diameter body and flange respectively in the groove width direction as described above. As described in claim 3, the small-diameter body portion is formed in an inclined body portion whose diameter is increased from the outer peripheral edge of the bottom portion toward the upper end, and the flange portion is extended from the inner peripheral end to the outer peripheral end. It may be formed in a horizontal flange portion projecting horizontally toward the surface, in other words, it may be formed in a shape corresponding to the contents to be accommodated.

  A specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a container main body 1, a lid 10, and a content A stored in the container, and FIG. 3 is a simplified perspective view of the entire container, and FIG. 3 is a longitudinal front view thereof. The container body 1 is formed by drawing a thin film of polyethylene or polypropylene having a thickness of 0.5 mm or less, or a synthetic resin film such as polyethylene terephthalate. A circular bottom 3 is integrally provided at the lower end of the cylindrical barrel 2 having a certain height, and the barrel 2 is provided in the middle in the height direction over the entire circumference. A flat annular flange portion 4 having a constant width in the horizontal direction is integrally formed, and the upper portion of the body portion 2 is integrally connected to the outer peripheral edge of the flange portion 4 through the flange portion 4. Is formed on the large diameter body 2A, while It is formed in a small-diameter body portion 2B that is integrally connected to the inner peripheral edge of the flange portion 4.

  In other words, the body 2 forms a small-diameter body 2B having a constant height upward from the outer peripheral end of the circular bottom 3 and outwards from the upper end of the small-diameter body 2B. A flat annular flange portion 4 having a refracted constant width is formed, and a large-diameter body portion 2A having a constant height is refracted upward from the outer peripheral end of the flange portion 4. The small-diameter barrel portion 2B is formed as a downward truncated cone-shaped inclined barrel portion that gradually increases in diameter from the outer peripheral end to the upper end of the bottom portion 3, and the flange portion 4 extends from the inner peripheral end toward the outer peripheral end. The large-diameter body 2A is also formed on the inclined body that is slightly inclined from the lower end toward the upper end. The body portions 2A and 2B may be formed in a cylindrical shape having substantially the same diameter over the entire length, and the flange portion 4 is also formed in a flange portion that is gently inclined obliquely upward from the inner peripheral end toward the outer peripheral end. It may be left.

  In addition, the large-diameter body 2A has an inner and outer peripheral surface formed on a smooth surface that is continuous in a circular shape having no uneven surface, while the small-diameter body 2B is formed from the outer surface to the inner periphery at small intervals in the circumferential direction. A plurality of longitudinal grooves 5 having a constant groove width formed by bending in a concave arc shape in cross section toward the surface are formed, and a narrow body wall portion is formed between the longitudinal grooves 5 and 5 adjacent in the circumferential direction. Formed in 2b.

  That is, as shown in FIGS. 1, 2, and 4, the small-diameter body portion 2B includes a narrow body wall portion 2b and a longitudinal groove 5 that is open on the outer peripheral surface side of the small-diameter body portion 2B in the circumferential direction. In the inner peripheral surface of the small-diameter barrel portion 2B, the vertical groove 5 protrudes inward from the inner peripheral surface of the adjacent narrow trunk wall portion 2b as a vertical ridge. The longitudinal groove 5 is formed into a longitudinal groove having a constant groove width formed by bending a cross section concave arc shape from the inner peripheral surface side to the outer peripheral surface side of the small diameter body portion 2B, and the opening end of the groove is formed as a small diameter body. The structure may be such that the opening is made on the inner peripheral surface side of the portion 2B and the outer peripheral surface side of the small-diameter barrel portion 2B protrudes as a vertical ridge.

  Further, a lateral groove 6 is formed in the flange portion 4 so as to cross from the inner peripheral end to the outer peripheral end of the flange portion 4 at the same interval as the vertical groove 5 formed in the small-diameter body portion 2B in the circumferential direction. In addition, the inner ends of the horizontal grooves 6 are connected to the upper ends of the vertical grooves 5 facing the inner ends, and the horizontal grooves 6 are communicated from the upper ends of the vertical grooves 5 in a state of being refracted in the horizontal direction. .

  The horizontal groove 6 has the same cross-sectional shape as the vertical groove 5 and has the same groove width. As described above, the vertical groove 5 curves in a concave circular arc shape from the outer peripheral surface of the small-diameter body portion 2B toward the inner peripheral surface. 1, 2, and 5, the lateral groove 6 is provided in a state of being curved in a concave arc shape in cross section from the lower surface to the upper surface of the flange portion 4. The upper surface of the portion 4 protrudes from the upper surface as a convexly curved ridge, but the longitudinal groove 5 is curved in a concave arc shape in cross section from the inner peripheral surface to the outer peripheral surface of the small diameter body portion 2B. In the case where the horizontal grooves 6 are formed, the lateral grooves 6 are provided in a state of being curved in a cross-sectional concave arc shape from the upper surface to the lower surface of the flange portion 4.

  Further, the outer ends of the respective lateral grooves 6 are opened outward from the outer peripheral surface of the lower end portion of the large-diameter body portion 2A in the body portion 2 refracted upward from the outer periphery end of the flange portion 4. Therefore, as shown in FIGS. 1 and 6, the lower end portion of the large-diameter body portion 2 </ b> A has a height that is sequentially divided in the circumferential direction through the opening end portion of the lateral groove 6 equal to the height of the lateral groove 6. It is formed in narrow partition wall surface parts 2a, 2a.

  The upper-end opening of the large-diameter body 2A is formed in a flat ring-shaped mouth edge 2C having a constant width that is refracted horizontally toward the outside, and the outer peripheral edge of the mouth edge 2C is downward. The circular engagement portion 2c is formed by being refracted toward the center.

  The lid body 10 that detachably covers the upper end of the large-diameter body portion 2A of the container body 1 is formed by drawing the same thin synthetic resin film as the container body 1, and the outer periphery of the lid body 10 is the same as that of the container body 1. A circular ring-shaped hook part 11 is formed on the upper surface of the rim part 2C of the large-diameter trunk part 2A, and the circular locking part 2c of the container body 1 is directed downward from the outer peripheral end of the hook part 11. An outer peripheral edge portion 11a to be externally fitted to the outer peripheral edge portion 11a is projected, and an inward engagement end portion is formed at the lower end of the outer peripheral edge portion 11a so as to be detachably engaged with the lower end of the circular engagement portion 2c. In addition, the shape of the lip 2C of the container body 1 and the lid 10 that is detachably fitted to the lip 2C is not limited to the above-mentioned configuration, and other generally known shapes are adopted. May be.

  Further, as the contents A to be accommodated in the container body 1, in this embodiment, disposable thin-walled paper made by forming a large number of vertical rods on the peripheral wall that divides the food and accommodates it in the lunch box, etc. This food storage container a has a peripheral wall with the same inclination as that of the lower small-diameter body 2B of the container body 1 and is directed upward from the lower end. Since it is formed in a downward truncated frustoconical shape with an expanded diameter, the body 2 extends from the bottom 3 of the container body 1 to the outer peripheral surface of the peripheral wall from the outer bottom surface of the outermost food storage container a. Although it is formed in a size that can be supported without causing reluctance, the contents A may be other small articles or foods. In short, the contents A are in a stable state in the container body 1. Between the upper end surface and the lower surface of the lid 10 In addition, the flange portion 4 may be stored so as to provide a gap that allows the lid body 10 to move downward when the flange portion 4 is bent downward.

  In the normal state in which the compressing force pressing downward on the upper surface of the lid 10 is not applied to the packaging container configured as described above, the flange portion 4 has a small diameter barrel portion as shown in FIGS. The state of projecting horizontally from the upper end of 2B toward the outside is maintained.

  Next, as shown in FIG. 8, when a compressive force that presses downward is applied to the lid 10 of this packaging container, the compressive force brings the container body 1 in close contact with the lower surface of the flange portion 11 of the lid 10. It acts in a direction to push down the large-diameter trunk 2A from the rim 2C of the large-diameter trunk 2A, which is the upper part of the large-diameter trunk 2A. As shown in FIGS. 8 and 9, the flange portion 4 is bent downward as shown in FIGS. 8 and 9 with the upper end of the small-diameter barrel portion 2B on the lower side of the container body 1 in which the inner peripheral end of the flange portion 4 is continuously provided by the compressive force. Be made.

  When the flange portion 4 is bent downward from the horizontal state with the upper end of the small-diameter body portion 2B as a fulcrum, the outer diameter of the flange portion 4 is deformed in the direction of a small diameter, that is, the outer peripheral length contracts in the circumferential direction. As shown in FIG. 10, the lateral groove 6 provided in the flange portion 4 so as to cross the flange portion 4 at small intervals in the circumferential direction makes the groove width elastic as shown in FIG. Thus, the compression force (shrinkage amount) is uniformly absorbed, and the flange portion 4 can be elastically refracted smoothly and reliably without causing partial buckling deformation.

  At this time, at the outer peripheral end of the flange portion 4, as described above, the outer end of each lateral groove 6 opens outward from the outer peripheral surface of the lower end portion of the large-diameter barrel portion 2A in the trunk portion 2. At the lower end portion of the large-diameter body portion 2A, there are narrow wall surface portions 2a, 2a,... Having a width that is sequentially divided in the circumferential direction through the opening end portion of the horizontal groove 6 equal to the height of the horizontal groove 6. Therefore, when the outer peripheral end of the flange portion 4 is contracted in the circumferential direction as described above due to the downward refraction, the outer end portion of the lateral groove 6 is elastically deformed in the direction of narrowing the groove width. However, the narrow partition wall surface portion 2a that absorbs the contraction force and forms the lower end peripheral wall portion of the large-diameter body portion 2A together with the outer end portion of the lateral groove 6 is not likely to be compressed and deformed. As described above, the lower end portion of the large-diameter body portion 2A as well as the outer peripheral end portion of the flange portion 4 are not distorted as described above. Elastically bending deformed downward, i.e., exhibits a buffering action while refraction, it is possible to protect the contents.

  On the other hand, at the inner peripheral end portion of the flange portion 4, the lower small-diameter barrel portion 2 </ b> B in the trunk portion 2 of the container body 1 is inclined upward from the outer peripheral end of the bottom portion 3 as shown in the drawing. When the flange portion 4 is refracted downward with the upper end of the small-diameter barrel portion 2B as a fulcrum as described above due to the downward compressive force acting on the container body 1, the small-diameter barrel portion 2B becomes the bottom 3 The outer peripheral end of the small diameter body portion 2B is further expanded in diameter, that is, the peripheral length of the upper end portion of the small diameter body portion 2B is deformed, but the flange portion 4 is provided according to the amount of expansion. The inner ends of the lateral grooves 6 and the longitudinal grooves 5 provided with the small diameter body portions 2B and communicating with the respective lateral grooves 6 are elastically deformed in the widening direction to absorb the extension amount, and the flange portions 4 and the small diameter body portions There is no distortion deformation in 2B. When the compressive force on the container body 1 is released, the flange portion 4 can be elastically returned to the original state and the container body 1 can be held in a predetermined form.

  In the above embodiment, the planar circular container body 1 has been described. However, as shown in FIG. 11, a rectangular container in which the corners of the peripheral wall are curved in an arc shape or as shown in FIG. In addition, an ellipse-shaped container or a container having other shapes may be used to form a container that exhibits a buffering function against a compressive force or an impact force by adopting the structure of the flange portion 4. In these containers, the same reference numerals are given to the portions corresponding to the respective parts of the container described in the above embodiment, and the detailed description is omitted.

The exploded perspective view of the whole container. The simplified perspective view. FIG. The cross-sectional view of a part of the small-diameter trunk. The longitudinal cross-section front view of a part of flange part. The perspective view of a part of a container main body. The plan view. The longitudinal section front view of the whole container when compressive force acts. FIG. The plan view. The perspective view which shows the modification of this invention. The perspective view which shows another modification of this invention.

Explanation of symbols

1 Container body 2 Body
2A large diameter body
2B Small diameter barrel 3 Bottom 4 Flange 5 Vertical groove 6 Horizontal groove
10 Lid

Claims (3)

  An intermediate part in the height direction of the body part, comprising a container body integrally provided with a bottom part at the lower end of the body part having an open upper end and a lid body detachably covered on the upper end opening part of the container body A flat annular flange portion having a constant width is formed over the entire circumference, and the lower portion of the barrel portion is formed through this flange portion as a small-diameter barrel portion whose upper end is integrally connected to the inner circumferential end of the flange portion. On the other hand, in a thin synthetic resin packaging container in which the upper part of the body part is formed in a large-diameter body part whose lower end is integrally connected to the outer peripheral end of the flange part, the width of the small-diameter body part extends over the entire circumference. A large number of longitudinal grooves that can be elastically expanded and contracted in the direction are bent, and the lateral grooves that reach the outer peripheral end of the flange portion from the upper end of each of the longitudinal grooves are elastically expanded and contracted in the groove width direction. A synthetic resin packaging container that is bent and formed as possible.   It is characterized in that a longitudinal groove formed in the small-diameter body portion and a lateral groove formed in a flange portion in which an end portion on the inner peripheral side is continuous with the upper end of each longitudinal groove are provided at small intervals in the circumferential direction. The synthetic resin packaging container according to claim 1.   The small-diameter body part is formed on an inclined body part whose diameter is expanded from the outer peripheral end of the bottom part toward the upper end, and the flange part is formed on a horizontal flange part projecting horizontally from the inner peripheral end to the outer peripheral end. The synthetic resin packaging container according to claim 1 or claim.

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