JP2017132516A - Lid for packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid for a container, which has a structure enabling protruding pieces, provided on outer peripheral parts of the lids, to be aligned with one another in a united direction by preventing the lids from being turned when the lids for a circular inner fitting container are integrated.SOLUTION: An engagement part 5 recessed inward is formed on a peripheral side wall 2 of a circular inner fitting lid X. Thus, when the lids X are integrated, the engagement parts 5, 5... of the upper and lower lids X, X... are engaged with each other so that positions of protruding pieces 4 provided in an outward protruding manner on an outer peripheral part of a flange 3 of the lid X can be aligned with a united position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging container comprising a container body and a lid that is internally fitted to the container body.

When using a synthetic resin sheet as a material to form a container lid by thermoforming such as vacuum molding or hot plate molding, after forming the same shape lid continuously, the next step is die cutting (cutting the outer circumference) , Pile up multiple sheets. At that time, if the lid is circular, the lid rotates due to static electricity or vibration, and a phenomenon occurs in which the directionality of the rotation direction with respect to the central axis of the lid cannot be kept constant.

A number of molded / die-cut container lids are stored in a bag and shipped. In the case of a lid provided with a protruding piece such as a knob on the outer periphery of the lid, if there is variation in the rotation direction with respect to the central axis, the load concentrates on the protruding piece, and the protruding piece can maintain its strength in the bag. However, the protruding piece itself may be deformed, bent, or cracked, or the protruding piece may cut the packaging bag.
Therefore, by aligning the position of the protruding piece in a unified direction, the protruding piece and the packaging bag are changed from a point contact state to a surface contact state, and the load is distributed, so that a concentrated load is applied to one place. It is necessary to prevent it from hanging.

Also, when storing the lids of the collected and packaged containers in the box, if the protruding pieces are in a random direction, a lid storage space having a radius from the center of the lid to the tip of the protruding piece is required, Efficient accommodation is impossible due to useless space.

In FIG. 1 of Patent Literature 1 and FIG. 4 of Patent Literature 2, a lid is provided in which a protruding piece serving as a knob is provided on the outer peripheral portion of the inner fitting lid.

Japanese Patent Application Laid-Open No. 2014-114063 JP 2008-24338 A

      The problem to be solved by the present invention is to prevent the lid from rotating when accumulating the inner fitting circular lids provided with protruding pieces such as knobs on the outer peripheral portion, in a direction in which the protruding pieces are unified. An object of the present invention is to provide a container lid having a structure that can be aligned.

  Therefore, the present invention seeks to solve the problem by adjusting the position of the protruding piece by devising the shape of the lid.

The present invention relates to a lid that fits inside an opening inner surface of a packaging container body having a circular opening in plan view, the lid having a top wall that has a circular shape in plan view located at the center, and the top wall A peripheral side wall that is lowered and connected from the periphery of the peripheral wall, a bottom wall that is connected in the outer peripheral direction from the lower end of the peripheral side wall, a fitting wall that is connected to the bottom wall by rising from the outer periphery, and the fitting wall And a flange connected in the outer peripheral direction from the upper end of the.
At least one protruding piece protruding outward is formed on the outer peripheral portion of the flange, and at least one engaging portion recessed inward is provided on the peripheral side wall.

In the present invention, the engaging portion is formed on the peripheral side wall of the lid that is internally fitted to the container body, so that when the lid is integrated, the engaging portions of the upper and lower lids are engaged with each other on the outer peripheral portion of the lid. The positions of the provided protruding pieces are aligned in a certain direction. In that case, it is preferable that the inclination angle of the side wall of the engaging portion is smaller than the inclination angle of the peripheral side wall.
By making the inclination angle of the side wall of the engaging portion smaller than the inclination angle of the peripheral side wall, the clearance between the upper and lower lids becomes smaller and the engagement state is ensured, and a stable positioning effect at the time of accumulation is obtained. It is done.

  The shape of the engaging portion can be a semicircular shape, a rectangular shape, a triangular shape or the like in plan view, but is not particularly limited as long as it is recessed inward of the peripheral side wall.

The size of the engaging portion is not particularly limited as long as the engaging portion has a size and a depth to engage with each other when the lid is vertically stacked. You may have reached.
By deepening the engaging portion, the interference area of the engaging portion of the lid that overlaps vertically is widened compared to a shallow case, and a more stable rotation preventing effect can be obtained.
Further, the position and number of the engaging portions are not particularly limited.

    As the material of the lid, a transparent material such as biaxially stretched polystyrene sheet, non-crystalline polyethylene terephthalate, or transparent polypropylene is generally used. It may be a resin sheet.

  As the lid molding method, a method of heating and molding the synthetic resin sheet is used, and specifically, a heat molding method such as pressure molding, vacuum pressure molding, vacuum molding, hot plate molding or the like is used.

    As the thickness of the synthetic resin sheet, a range of 0.1 to 1.0 mm can be used for a general-purpose product, and a thickness of 0.2 to 0.5 mm is more suitable for a lid sheet.

In the present invention, by forming the engaging portion on the peripheral side wall of the lid of the packaging container, when the lid is stacked and accumulated, the position of the protruding piece formed on the outer peripheral portion of the lid can be aligned in a certain direction. It is related to the structure that can be made, the load on each protruding piece is reduced by aligning the position of the protruding piece in a certain direction, deformation, folding, cracking of the protruding piece itself is prevented. Demonstrates the effect of preventing cutting.
In addition, when storing the collected and bagged lids in a box, it is possible to eliminate the useless space in the box and efficiently store the lid.

It is a perspective view of the lid by the embodiment to which the present invention is applied. (A) is sectional drawing of the engaging part which shows the state which accumulated the cover by the embodiment to which this invention is applied. (B) is sectional drawing which shows the inclination of the side wall of the engaging part of the lid | cover by embodiment to which this invention is applied. (A) is a schematic diagram which shows the state which accommodated the conventional cover in the box. (B) is a schematic diagram which shows the state which accommodated the cover by embodiment which applied this invention in the box.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. A lid according to an embodiment of the present invention relates to a lid X that fits inside an opening inner surface of a packaging container body having a circular opening in a plan view, and is a plane located in the center as shown in FIG. A top wall 1 that has a circular shape, a peripheral wall 2 that is lowered and connected from the periphery of the top wall 1, a bottom wall 7 that is connected in an outer peripheral direction from the lower end of the peripheral wall 2, and an outer periphery of the bottom wall 7 And the flange 3 connected in the outer peripheral direction from the upper end of the fitting wall 6.

One protruding piece 4 protruding outward is formed on the outer peripheral portion of the flange 3, and one engaging portion 5 recessed inward is formed on the peripheral side wall 2. In the present embodiment, one protruding piece 4 and one engaging portion 5 are formed. However, the protruding piece 4 and the engaging portion 5 are not limited to one, and a plurality of protruding pieces 4 and engaging portions 5 may be formed.

The lid according to the embodiment of the present invention is formed when the lid is integrated as shown in FIG. 2A by forming the engaging portion 5 on the peripheral side wall 2 of the lid that is fitted inside the container body. The engaging portions 5, 5... Of the upper and lower lids X, X... Engage to align the positions of the protruding pieces 4 provided on the outer peripheral portion of the lid X in a certain direction. At that time, as shown in FIG. 2B, the inclination angle α of the side wall 5 a of the engaging portion 5 is preferably smaller than the inclination angle β of the peripheral side wall 2.
By making the inclination angle α of the side wall 5a of the engagement portion smaller than the inclination angle β of the peripheral side wall 2 (α <β), the engagement portions 5, 5. Thus, there is no play and a stable positioning effect at the time of accumulation is obtained.
If the inclination angle β of the peripheral side wall 2 is too small, the stacked lids may be tilted and orderly accumulation may be difficult. However, when only the inclination angle α of the side wall 5a of the engaging portion is reduced, the accumulation is difficult. The effect is small.

  The shape of the engaging portion 5 is not limited to a semicircular shape as seen in a plan view as shown in FIG. 1, and may be a shape such as a rectangle or a triangle. It is not limited.

The size of the engaging portion 5 is not particularly limited. The engaging portion 5 may have a size and a depth with which the engaging portions 5, 5... What is necessary is just to arrive at the bottom wall 7 as shown in FIG.1 and FIG.2.
When the engaging portion 5 is deepened, the interference area of the engaging portions 5, 5... Of the overlapping lids is widened, and a more stable rotation preventing effect can be obtained as compared with a shallow case.
Further, the position and number of the engaging portions 5 are not particularly limited.

    In the embodiment of the present invention, a biaxially stretched polystyrene sheet is used as a lid material, but the lid material is not limited to a biaxially stretched polystyrene sheet, and a transparent material such as amorphous polyethylene terephthalate or transparent polypropylene is generally used. It may be a synthetic resin sheet used for a main body that is used as a so-called cover, or another synthetic resin sheet.

  In the embodiment of the present invention, the synthetic resin sheet thermoforming method by hot platen was used. However, the lid forming method is not limited to hot platen, and is a hot mold method such as pressure forming, vacuum pressure forming, vacuum forming or the like. Is used.

    In the embodiment of the present invention, a 0.25 mm sheet was used. However, as the thickness of the synthetic resin sheet, a range of 0.1 to 1.0 mm can be used for general-purpose products, and more preferably 0.2 to A thickness of 0.5 mm is suitable for a lid sheet in terms of formability, economy, strength, and the like.

As shown by a two-dot chain line in FIG. 3 (A), when the lid 4 is stored in the box Y, if the protruding piece 4 faces in a random direction, the radius from the center of the lid to the tip of the protruding piece 4 A lid storage box space is required, and a wasteful space is required and efficient storage is impossible.
In the lid X of the embodiment of the present invention, as shown by a broken line in FIG. 3B, the protruding pieces 4 are aligned at a certain position, so that the protruding pieces 4 are minimized by directing the protruding pieces 4 in the corner direction Y1 of the box. Efficient storage of the lid is possible in the storage space.

  When storing a plurality of integrated lids X1 packed with a lid and packed in a box Y, the lid X according to the embodiment of the present invention can be stored in the box Y without wasteful space as shown in FIG. On the other hand, in the case of a lid without the engaging portion 5, as shown in FIG. 3 (A), the box Y cannot be fully accommodated, and a box with a larger volume is required.

Further, when the lid X according to the embodiment of the present invention is accommodated in a bag in a state where a large number of the lids X are stacked, the protruding pieces 4 are aligned at a fixed position, and therefore the same as the individual protruding pieces 4, 4. The load from the direction is distributed and applied, and deformation, breakage, and cracking of the protruding piece 4 are less likely to occur, and an effect of suppressing the protruding piece 4 from cutting the packaging bag is obtained.

DESCRIPTION OF SYMBOLS 1 Top wall 2 Peripheral side wall 3 Flange 4 Projection piece 5 Engagement part 6 Fitting side wall 7 Bottom wall

Claims (2)

A lid of a packaging container that fits inside an opening inner surface of a container body having a circular opening in plan view, the lid falling from the periphery of the top surface wall in plan view located in the center and in a circular shape in plan view Connected peripheral walls, a bottom wall connected in the outer peripheral direction from the lower end of the peripheral side wall, a fitting wall connected upwardly from the outer periphery of the bottom wall, and an outer peripheral direction from the upper end of the fitting wall It is composed of flanges connected to
At least one protruding piece protruding outward is formed on the outer peripheral portion of the flange,
The packaging container lid is provided with at least one engaging portion recessed inwardly on the peripheral side wall. The lid of the packaging container according to claim 1, wherein an inclination angle of the side wall of the engaging portion is smaller than an inclination angle of the peripheral side wall.

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