JP2005047599A - Molded container having pull-tab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded container having a pull-tab, which ensures sufficient sealing strength and is easy to open. <P>SOLUTION: The container includes: a flange 16 which is formed around the peripheral edge of the opening of an injection-molded container body 12; the pull-tab 20 formed on the flange 16 so as to jut out from it; a thin wall portion 22 formed at the base end of the pull-tab 20; and a lid attached to the flange 16 and pull-tab 20 so as to cover the peripheral edge of the opening of the container body 12. By pulling up the pull-tab 20, the lid is peeled from the flange 16 such that the pull-tab 20 is teared off in the thin wall 22 and is separated from the container body 12. In the cross-sectional shape of the thin wall 22, either the side of the pull-tab 20 or the container body 12 is thin. The corner of the thin part is formed in the shape of an edge whereas the corner of the thick part is rounded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a molded container with a pull tab for storing flexible foods containing a lot of water such as tea fumigation and frozen desserts, and other stored items.

A molded container for packaging flexible foods containing a large amount of water, such as tea fumigation, is composed of a cup-shaped container body and a lid that is in close contact with the peripheral edge of the opening of the container body by heat sealing or the like. The container body is generally made by thermoforming with a sheet-like thermoplastic resin. A flange portion to which a lid member is attached is provided at the peripheral edge portion of the opening of the container body, and the lid member has a shape substantially the same as the outer shape of the flange portion. In addition, some lid members are provided with a tongue-shaped knob portion protruding outside the flange portion. In such a method of using a molded container, the contents are first put in the container body, and then a lid member is pressed against the flange portion and bonded by heat sealing. When opening, it has the knob | pick part of the cover material which protrudes from the flange part of a container main body, raises, peels a cover material from a flange part, and opens it.
JP-A-63-44473 JP-A 63-96074 Japanese National Publication No. 4-502299

  When a conventional molded container is opened, a small knob made of a thin sheet-like lid material must be held so as not to slip and peeled off from the container body with a strong force. It was difficult for a free person to open. On the other hand, if the adhesive strength of the lid is weakened to such an extent that it can be easily opened, there are problems such as inadvertent peeling and deterioration of watertightness and airtightness.

  The present invention has been made in view of the above problems, and an object thereof is to provide a molded container with a pull tab that has a sufficient sealing strength and can be easily opened.

  The present invention includes a flange portion provided at a peripheral edge portion of an opening of an injection molded container body, a pull tab formed on the flange portion and protruding outward, and a thin wall portion formed on a base end portion of the pull tab. A lid member that is attached to the flange portion and the pull tab and is attached by closing a peripheral edge portion of the opening of the container body, and the lid member is peeled from the flange portion by pulling up the pull tab. Is a molded container with a pull tab that is torn at the thin part and separated from the container body, and the lid is opened.

  As for the cross-sectional shape of the thin portion, one of the pull tab side and the container body side is formed thin, the corner of the thin portion is formed in an edge shape, and the corner of the thick portion is formed in an R shape. Is.

  A protruding corner portion serving as a starting point portion of the tear when the thin portion is broken is formed in a part of the thin portion. The thin portion is provided in a direction intersecting at an arbitrary angle with respect to the protruding direction of the pull tab. In addition, the thin portion is formed in a V shape whose corners face in the protruding direction of the pull tab, or in a V shape whose corners face opposite to the protruding direction of the pull tab. Furthermore, the angle of the thin portion with respect to the protruding direction of the pull tab may be a substantially right angle. In addition, an ultrathin portion serving as a starting end portion of the tear when the thin portion is broken may be formed in a part of the thin portion.

  On both sides of the pull tab of the flange portion, an overhang portion is formed continuously from the peripheral portion of the flange portion to the vicinity of the tip end of the pull tab. The overhanging portion is provided at a level lower than the flange portion and the pull tab in the thickness direction of the flange portion so as to be separated from the lid member. Further, it is preferable that an uneven portion for preventing slipping is provided on the back surface of the pull tab.

  The present invention also includes a flange provided at the peripheral edge of the opening of the injection molded container body, a pull tab formed on the flange and protruding outward, and a groove formed on the base end of the pull tab. A lid member that is attached to the flange portion and the pull tab and is attached by closing a peripheral edge portion of the opening of the container body, and the lid member is peeled from the flange portion by pulling up the pull tab. Is a molded container with a pull tab that is folded at the groove and separated from the container body, and the lid is opened.

  The present invention also includes a flange portion provided at a constant width at the peripheral edge of the opening of the injection molded container main body, a lid member that covers and bonds the peripheral edge of the opening of the container main body, and the lid material. A knob is formed on the peripheral edge of the container and protrudes laterally from the flange. A plate-like pull tab separate from the container body is bonded to the knob, and the pull tab is pulled up. By this, the lid material is a molded container with a pull tab in which the lid material is peeled off from the flange portion and the lid material is opened.

  The molded container with a pull tab of the present invention can be easily opened while the cover material has sufficient strength. The container body can be easily formed into a complicated shape by injection molding, and can be freely designed such as a pull tab breaking method and a non-slip uneven portion. Furthermore, the shape of the pull tab can also be set freely.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the present invention. A molded container 10 with a pull tab of this embodiment has a bottomed cylindrical container body 12 that is injection-molded. A cylindrical leg portion 14 is integrally provided on the outer lower side. A flange portion 16 is provided around the periphery 12 a of the opening of the container body 12. On the upper surface of the flange portion 16, a raised portion 18 that slightly bulges upward is provided around the circumference.

  A pull tab 20 is integrally provided on a part of the flange portion 16. The pull tab 20 is adjacent to the outer peripheral portion 18 a of the raised portion 18 of the flange portion 16, and extends in the radial direction of the flange portion 16 with a constant width. The pull tab 20 is formed in a triangular shape with its middle portion extending to both sides in a direction perpendicular to the extending direction of the pull tab 20 and having a corner portion at the tip.

  The base end portion of the pull tab 20 is sandwiched between the extended portions 16 a of the flange portion 16, and is a position recessed with respect to the extended portion 16 a, and is located on the outer peripheral portion 18 a of the raised portion 18 of the flange portion 16. A thin portion 22 is formed in the adjacent portion in the tangential direction of the flange portion 16. As shown in FIG. 4, the thin portion 22 is provided by a groove-like recess 24 formed in the lower side surface 20 a of the pull tab 20. The cross-sectional shape of the concave portion 24 is formed in an edge shape in which the corner portions of the inner wall portion 24a and the bottom portion 24b on the flange portion 16 side intersect substantially at right angles. The inner wall portion 24c of the concave portion 24 on the tip end side of the pull tab 20 gradually approaches the lower side surface 20a of the pull tab 20 in a rounded manner as the distance from the bottom portion 24b of the concave portion 24 decreases. Slightly bulges into an R shape. In the triangular portion of the pull tab 20, three linear protrusions 26 for preventing slippage are provided on the lower side surface 20 a so as to be arranged perpendicular to the protruding direction of the pull tab 20.

  In the method of using the molded container 10 with a pull tab of this embodiment, food with a lot of moisture such as tea fumigation is put in the container body 12, and a lid material (not shown) is adhered to the flange portion 16 and the upper side surface 20b of the pull tab 20 by heat sealing. When opening the molded container 10 with a pull tab, the pull tab 20 is pulled up to tear the thin portion 22, the pull tab 20 is separated from the container body 12, the pull tab 20 is caused together with the lid material, and the lid material is peeled off from the container body 12. Open.

  According to the molded container 10 with a pull tab of this embodiment, the container main body 12 and the pull tab 20 are integrally molded, and the number of parts is small and the manufacturing process is simple. In particular, integral molding is possible by injection molding, no post-processing is required, and work efficiency is good. Further, the lid tab 20 can be easily opened while the pull tab 20 is securely held, and a package that has sufficient sealing strength can be easily opened. Moreover, since the thin part 22 is dented in the extension part 16a of the flange part 16, a hand etc. are hard to touch the cut surface of the thin part 22, and it is safe.

  In the molded container 10 with a pull tab of this embodiment, for example, as shown in FIG. 5, a protruding corner portion serving as a starting point of tearing may be formed in a part of the thin portion 22. The shape of the thin portion 27 is formed in a V-shape in the vicinity of the center of the thin portion 27 with the corner portion facing the front end side of the pull tab 20.

  Furthermore, the molded container 10 with a pull tab of this embodiment is, for example, as shown in FIG. 6, on both sides of the pull tab 20 of the flange portion 16, an overhang portion 28 continuous from the peripheral edge portion of the flange portion 16 to the vicinity of the tip end of the pull tab 20. May be formed. The pull tab 20 is formed in a pentagonal shape having two side edges parallel to the protruding direction of the pull tab 20 and two sides forming a corner of the tip. The overhanging portion 28 spreads away from the container body 12 as it approaches the pull tab 20 from the peripheral edge of the flange portion 16. A portion adjacent to the pull tab 20 with a predetermined interval is positioned on an extension of two sides forming the corner of the tip of the pull tab 20. Due to the overhanging portion 28, a gap between the flange portion 16 and the pull tab 20 is positioned in the vicinity of the tip of the pull tab 20, and the gap faces the protruding direction of the pull tab 20. For this reason, the positioning member of the container main body 12 is not easily caught in the gap between the flange portion 16 and the pull tab 20 in the production line, and can be manufactured smoothly and with a high yield.

  Moreover, the molding container 10 with a pull tab of this embodiment may be provided in the direction where a thin part cross | intersects with respect to the protrusion direction of the said pull tab 20 at arbitrary angles. For example, as shown in FIG. 7, the entire thin portion 30 is formed in a V shape whose corners are directed in the protruding direction of the pull tab 20. Or as shown in FIG. 8, the thin part 30 whole may be formed in the V shape where a corner | angular part turns to the opposite side to the protrusion direction of the pull tab 20. As shown in FIG. Also in this embodiment, it is preferable that the protruding portion 28 is formed as in the molded container 10 with a pull tab in FIG.

  Further, as shown in FIG. 9, the overhanging portion 28 may be provided by being stepped down by a step portion 32 so as to be separated from the cover member in the thickness direction of the flange portion 16 relative to the peripheral portion of the flange portion 16 and the pull tab 20. Good. This makes it easy to wash the contents overflowing the overhanging portion 28 when filling the contents or sticking the lid material, and the contents do not adhere and remain hygienic.

  Further, as shown in FIG. 10, in the molded container 10 with a pull tab of this embodiment, the base end portion of the pull tab 20 is separated from the flange portion 16 by a slit 34 and is substantially perpendicular to the protruding direction of the pull tab 20. Thin thin portions 36 are provided on both sides of the pull tab 20 near the base end portion, and are connected to the flange portion 16 via a pair of thin portions 36. Also in this embodiment, the pull tab 20 is separated from the flange portion 16 by tearing the thin portion 34 and opened.

  Next, a second embodiment of the present invention will be described. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. 11 and 12 show a second embodiment of the present invention. A molded container 38 with a pull tab of this embodiment has a bottomed cylindrical container body 12 which is injection-molded. A cylindrical leg portion 14 is integrally provided on the outer lower side. A flange portion 16 is provided around the periphery 12 a of the opening of the container body 12. On the upper surface of the flange portion 16, a raised portion 18 that slightly bulges upward is provided around the circumference.

  A semicircular pull tab 40 is provided on a part of the peripheral edge of the flange portion 16 so as to protrude laterally. At the base end portion of the pull tab 40, a groove portion 42 is formed that is positioned substantially perpendicular to the protruding direction of the pull tab 40. The cross-sectional shape of the groove part 42 is V-shaped. On the lower side surface 40 a of the pull tab 40, three linear protrusions 44 for preventing slipping are provided so as to be arranged substantially at right angles to the protruding direction of the pull tab 40.

  In the method of using the molded container 38 with a pull tab of this embodiment, food having a lot of moisture such as tea fumigation is put in the container body 12, and a lid material (not shown) is bonded to the flange portion 16 and the upper side surface 40b of the pull tab 40 and sealed. When the molded container 38 with a pull tab is opened, the pull tab 40 is bent and folded at the groove portion 42, separated from the container main body 12, and the pull tab 40 is caused together with the lid member, and the lid member is peeled off from the container main body 12 and opened.

  According to the molded container 38 with a pull tab of this embodiment, the strong pull tab 40 provided on the flange portion 16 having the thickness has the same effect as the above embodiment, and can be easily folded and opened from the groove portion 42. Can do.

  Next, a third embodiment of the invention will be described. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. 13 and 14 show a third embodiment of the present invention. A molded container 46 with a pull tab of this embodiment has a bottomed cylindrical container body 12 which is injection-molded. A cylindrical leg portion 14 is integrally provided on the outer lower side. A flange portion 16 having a constant width is provided around the peripheral edge portion 12 a of the opening of the container body 12. On the upper surface of the flange portion 16, a raised portion 18 that slightly bulges upward is provided around the circumference.

  The container main body 12 is provided with an obtuse isosceles triangular pull tab 48 which is a separate body. On the lower side surface 48 a of the pull tab 48, three linear protrusions 50 for preventing slipping are arranged in parallel to the long side of the pull tab 48.

  The long side of the pull tab 48 is located at a predetermined distance so as to be along the peripheral edge of the flange portion 16 of the container body 12. The flange portion 16 of the container body 12 and the upper side surface 48 b of the pull tab 48 that is separated by a predetermined distance are attached to the lid member 52. The shape of the lid member 52 is formed in a circular shape that covers the flange portion 16 of the container body 12, and a tongue-side knob 54 that protrudes laterally from the flange portion 16 and covers the pull tab 48 is formed at a portion facing the pull tab 48. Is provided.

  The method of using the molded container 46 with a pull tab of this embodiment is that the pull tab 48 and the container body 12 are molded separately, and the pull tab 48 is set beside the flange portion 16 of the container body 12 in the filling line and bonded to the lid member 52. Then, the pull tab 48 and the container body 12 are connected. When opening the formed container 46 with a pull tab, the pull tab 48 is held and raised together with the lid member 52, and the lid member 52 is peeled off from the container body 12 and opened.

  According to the molded container 46 with a pull tab of this embodiment, it is not necessary to separate the pull tab 48 from the container main body 12 at the time of opening. And since there is no cut surface, a sharp part does not occur and it is safe. Moreover, since the container main body 12 has a circular shape around which the flange portion 16 having a constant width makes a round and does not have directionality, it is not necessary to position the container main body 12 on the production line.

  In addition, the molded container with a pull tab of the present invention is not limited to each of the above embodiments, and can be appropriately changed as necessary, for example, the shape of the pull tab, the shape and number of non-slip irregularities, etc. It can be changed freely. The contents can be used not only for foods with high moisture content but also as containers for storing various foods and other stored items. Moreover, the material of a container main body and a cover material can be set suitably.

It is a perspective view of a forming container with a pull tab of a first embodiment of this invention. It is a bottom view of the forming container with a pull tab of this embodiment. It is a partially broken front view of the molded container with a pull tab of this embodiment. It is an expanded longitudinal cross-sectional view of the thin part of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view which shows the modification of the shaping | molding container with a pull tab of this embodiment. It is a bottom view of the molding container with a pull tab of 2nd embodiment of this invention. It is a partially broken front view of the molded container with a pull tab of this embodiment. It is a bottom view of the shaping | molding container with a pull tab of 3rd embodiment of this invention. It is a partially broken front view of the molded container with a pull tab of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Molded container 12 with a pull tab Container main body 14 Leg part 16 Flange part 18 Swelling part 20 Pull tab 22 Thin part 24 Recessed part 26 Protrusion part

Claims (12)

  A flange provided at the peripheral edge of the opening of the injection molded container body, a pull tab that is formed on the flange and protrudes outward, a thin wall formed at the base end of the pull tab, and the flange And a lid member that is attached to the pull tab and that covers and adheres to the peripheral edge of the opening of the container body, the lid member is peeled from the flange portion by pulling up the pull tab, and the pull tab is the thin-walled portion. A molded container with a pull tab, which is torn and separated from the container body and the lid material is opened.   As for the cross-sectional shape of the thin portion, one of the pull tab side and the container body side is formed thin, the corner of the thin portion is formed in an edge shape, and the corner of the thick portion is formed in an R shape. The molded container with a pull tab according to claim 1.   The molded container with a pull tab according to claim 1 or 2, wherein a protruding corner portion serving as a starting point for tearing when the thin portion is broken is formed in a part of the thin portion.   The molded container with a pull tab according to claim 1 or 2, wherein the thin portion is provided in a direction intersecting at an arbitrary angle with respect to a protruding direction of the pull tab.   The thin-walled portion is formed in a V shape whose corners face in the protruding direction of the pull tab, or in a V shape whose corners face opposite to the protruding direction of the pull tab. 4. A molded container with a pull tab according to 4.   The molded container with a pull tab according to claim 4, wherein an angle of the thin portion with respect to a protruding direction of the pull tab is substantially a right angle.   2. The molded container with a pull tab according to claim 1, wherein an ultrathin portion serving as a starting end portion of the tear when the thin portion is broken is formed in a part of the thin portion.   2. A molded container with a pull tab according to claim 1, wherein overhanging portions are formed on both sides of the pull tab of the flange portion so as to continue from the peripheral edge of the flange portion to the vicinity of the tip of the pull tab.   9. The molded container with a pull tab according to claim 8, wherein the overhanging portion is provided so as to be separated from the lid member in the thickness direction of the flange portion with respect to the flange portion and the pull tab.   A flange provided at the peripheral edge of the opening of the injection molded container body, a pull tab formed on the flange and projecting outward, a groove formed at the base end of the pull tab, and the flange A lid member that is attached to the pull tab and that covers and adheres to the peripheral edge of the opening of the container body is provided, the lid member is peeled from the flange portion by pulling up the pull tab, and the pull tab is folded at the groove portion. A molded container with a pull tab, which is separated from the container body and the lid material is opened.   Formed on the peripheral edge of the lid material, a flange provided with a constant width at the peripheral edge of the opening of the injection molded container main body, a lid material that closes and bonds the peripheral edge of the opening of the container main body A tab portion protruding laterally from the flange portion is provided, and a plate-like pull tab separate from the container body is bonded to the knob portion, and the lid member is formed by pulling up the pull tab. Is peeled from the flange portion and the lid material is opened. The molded container with a pull tab according to any one of claims 1 to 11, wherein an uneven portion for preventing slippage is provided on a back surface of the pull tab.

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