JP2012201399A - Container lid integrally formed from synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container lid (2, 102) integrally formed from synthetic resin, which can be satisfactorily firmly attached to a top neck part (40) of a container and easily detached from the top neck part when the top neck part of the container is opened, and which can be manufactured without needing a posterior process.SOLUTION: The container lid includes: a top surface wall (4); a cylindrical skirt wall (6, 106) suspended from a peripheral edge of the top surface wall; a holding piece (8, 108) including an upper part (24) connected to the skirt wall and an extended part (26) extending downward over the skirt wall; and an outside cylindrical wall (10). An inner peripheral surface of the outside cylindrical wall is connected to an outer peripheral surface of the skirt wall via a plurality of breakable parts (34) disposed in a circumferential direction at intervals. The outside cylindrical wall is extended upward beyond the top surface wall.

Description

  The present invention relates to a container lid integrally formed from a synthetic resin, which is applied to a container in which a locking protrusion is formed on the upper end of the outer peripheral surface of a cylindrical mouth-neck.

  As a container for beer and soft drinks, there is a container formed of an appropriate synthetic resin such as glass or polyethylene terephthalate or a thin metal plate in which a locking jaw is formed at the upper end of the outer peripheral surface of the cylindrical mouth and neck. Widely used. And as a container lid for sealing the mouth-and-neck part of such a container, the following patent document 1 is disclosing the container lid integrally formed from the synthetic resin. In addition to the top wall and the cylindrical skirt wall depending from the periphery of the top wall, the container lid is separated from the skirt wall through a cutting surface generated in a cutting process performed as a post-processing after the injection molding process. The outer cylindrical wall (ring-shaped member) is provided. The outer cylindrical wall is not completely separated from the skirt wall, but is connected to the skirt wall via a plurality of cutting residue pieces spaced circumferentially. One of the remaining cutting pieces constitutes a non-breaking piece, and the other remaining cutting piece constitutes a breakable piece. Locking ridges are formed on the inner peripheral surface of the skirt wall to be locked to the locking jaws of the mouth and neck.

  The container lid as described above is fitted to the mouth and neck of the container and forced to press downward, and the locking protrusion formed on the inner peripheral surface of the skirt wall is attached to the locking jaw of the mouth and neck. It is attached to the mouth and neck by locking. When opening the mouth and neck, the predetermined part of the outer cylindrical wall is forced upward to break the breakable piece, and most of the outer cylindrical wall is displaced above the skirt wall, and further outside Forcing the entire cylindrical wall upward, thus forcing the skirt wall upward through a non-breaking piece to unlock the locking ridge of the skirt wall and the locking jaw of the mouth and neck, Remove the container lid from the mouth and neck.

JP-A-9-221155

  In the container lid as disclosed in the above-mentioned Patent Document 1, (1) The container lid is not necessarily sufficiently attached to the mouth and neck, and for example, an impact is applied to the container lid by dropping the container. There is a risk that the container lid may be displaced with respect to the mouth-neck portion, and the sealing of the mouth-neck portion may be damaged. (2) It is relatively difficult to break the breakable piece by forcing a predetermined part of the wall upward, (3) In addition to the injection molding process, a cutting process can be performed as a post-process in the production of the container lid There is a problem to be solved that is necessary.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that it can be sufficiently firmly attached to the mouth and neck of the container, and it is sufficiently easy to open the mouth and neck of the container. It is to provide a new and improved container lid integrally formed from a synthetic resin that can be detached from the mouth and neck and can also be manufactured without the need for subsequent steps.

  As a result of intensive research, the inventors have attached a gripping piece having an upper portion connected to the skirt wall and an extending portion extending downward beyond the skirt wall, and extending the outer cylindrical wall beyond the top wall. The present inventors have found that the main technical problem can be achieved by forming a configuration extending upward.

  That is, according to the present invention, as a container lid integrally formed from a synthetic resin that achieves the main technical problem, a top wall, a cylindrical skirt wall depending from the periphery of the top wall, and the skirt wall A gripping piece having a connected upper part and an extending part extending downward beyond the skirt wall, and an outer cylindrical wall, and the inner peripheral surface of the outer cylindrical wall is spaced apart in the circumferential direction. The outer cylindrical wall is connected to the outer peripheral surface of the skirt wall through a plurality of breakable portions arranged in the above manner, and the outer cylindrical wall extends upward beyond the top wall. An integrally formed container lid is provided.

  Preferably, the extending portion of the grip piece has a ring shape. An opening opened downward is formed in the skirt wall, the upper part of the gripping piece is located in the opening, and the skirt wall is connected by a connection portion extending in the circumferential direction on both sides in the circumferential direction of the upper part of the gripping piece. It is preferable to be connected to. The upper edge of the gripping piece may be connected to the skirt wall via a connecting portion. Preferably, both sides in the circumferential direction at the upper part of the grip piece are connected to the skirt wall via easy-to-break parts positioned below the connection part. Conveniently, the lower end of the inner peripheral surface of the outer cylindrical wall is connected to the upper portion of the outer peripheral surface of the skirt wall via the breakable portion. A plurality of locking protrusions extending in the circumferential direction are formed on the inner peripheral surface of the skirt wall, and the outer peripheral surface of the skirt wall extends in the circumferential direction at intervals in the circumferential direction. A plurality of pressed protrusions are formed, and the lower end of the outer cylindrical wall is preferably positioned above the annular pressed protrusion. A projecting shape extending continuously in the circumferential direction or a plurality of projecting shapes extending in the circumferential direction at intervals in the circumferential direction can be formed at the lower end portion of the inner peripheral surface of the outer cylindrical wall. In each of the two regions having an angular interval of 90 to 120 degrees on both sides in the circumferential direction from the circumferential center of the gripping piece, the pressed ridges present on the circumferential side on the outer circumferential surface of the skirt wall A non-existing portion of the compressed ridge generated in between is disposed, and is positioned on the inner peripheral surface of the outer cylindrical wall in alignment with the non-existing portion of the compressed ridge in the circumferential direction and in the axial direction. It is preferable that a constraining protrusion that extends is formed.

  According to the container lid of the present invention, after the container lid is fitted on the mouth and neck of the container and the top wall and the skirt wall are forced downward to bring the skirt wall into the required relationship with the mouth and neck, the top wall The outer cylindrical wall is lowered with respect to the skirt wall so that the entire outer cylindrical wall is positioned outside the skirt wall, and thus the skirt wall is pressed radially inward by the outer cylindrical wall, so that the mouth and neck of the container It is possible to make the skirt wall attached to the part sufficiently solid. When opening the mouth and neck of the container, it is possible to hold the gripping piece attached to the skirt wall and displace the outer cylindrical wall upward as required, and also attach the container lid to the mouth and neck When the outer cylindrical wall is lowered, the breakable part that connected the outer cylindrical wall to the skirt wall is broken and the outer cylindrical wall is completely separated from the skirt wall. The container lid can be easily detached from the mouth and neck. Since the outer cylindrical wall is displaced upward with respect to the skirt wall in the state before being attached to the mouth and neck of the container, the container lid is only subjected to the injection molding process without performing a cutting process as a subsequent process. Can be manufactured by.

The front view which shows suitable embodiment of the container lid comprised according to this invention. The side view of the container lid shown in FIG. Sectional drawing of the container lid shown in FIG. The bottom view of the container lid shown in FIG. Sectional drawing for demonstrating the mode which mounts the container lid shown in FIG. 1 to the mouth neck part of a container. Sectional drawing which shows the state which mounted | wore the mouth neck part of the container with the container lid shown in FIG. Sectional drawing for demonstrating the behavior at the time of removing the container lid shown in FIG. 1 from the mouth neck part of a container. Sectional drawing for demonstrating the behavior at the time of detaching | releasing the container lid shown in FIG. 1 from the mouth neck part of a container similarly to FIG. The front view which shows the modification of the container lid comprised according to this invention with the mouth neck part of a container.

  The invention will now be described in more detail with reference to the accompanying drawings showing a preferred embodiment of a container lid constructed in accordance with the present invention.

  Referring to FIGS. 1-4, the illustrated container constructed in accordance with the present invention, generally designated by the numeral 2, can be integrally injection molded or compression molded from a suitable synthetic resin such as polyethylene or propylene. The lid includes a top wall 4, a skirt wall 6 that hangs from the periphery of the top wall 4, a gripping piece 8, and an outer cylindrical wall 10. The top wall 4 has a circular shape, and an annular seal piece 12 extending downward is disposed on the inner surface thereof. An annular shoulder surface 14 facing upward is formed at the upper end of the outer peripheral surface of the skirt wall 6 having a substantially cylindrical shape. As clearly shown in FIG. 1, an opening 16 opened downward is formed in a predetermined angle area of the skirt wall 6. As clearly understood by referring to FIG. 3 and FIG. 4, a substantially intermediate region in the axial direction on the inner peripheral surface of the skirt wall 6 includes a plurality of arc-shaped engagements extending in the circumferential direction at intervals in the circumferential direction. A stop protrusion 18 is formed. Although it is possible to form a locking ridge that is continuous in the circumferential direction except for the region of the opening 16, in the illustrated embodiment, 90 degrees and A region where the arc-shaped locking ridges 18 do not exist at an angular position of 130 degrees, in other words, a gap between the adjacent arc-shaped locking ridges 18 is arranged. As can be clearly understood by referring to FIGS. 2 and 4, a plurality of pressed protrusions 20 extending in the circumferential direction are formed on the outer peripheral surface of the skirt wall 6 with an interval in the circumferential direction. . A pressed protrusion that extends continuously in the circumferential direction except for the opening 16 may be formed. However, in the region that forms an angle of 90 to 120 degrees from the circumferential center of the gripping piece 8 to both sides in the circumferential direction, It is preferable that the pressed protrusion non-existing portion 22 where the pressing protrusion 20 does not exist is disposed.

  The gripping piece 8 has an upper part 24 and an extension part 26. The upper part 24 of the gripping piece 8 is positioned in the opening 16 formed in the skirt wall 6, and both sides in the circumferential direction are connected to the skirt wall 6 by connecting portions 28 extending in the circumferential direction. Further, in the illustrated embodiment, both sides in the circumferential direction of the upper portion 24 of the gripping piece 8 are connected by an easily breakable portion 30 positioned below the connection portion 28. The easily breakable portion 30 is formed from a thin piece, and its breaking strength is sufficiently small. A protrusion 32 extending in the circumferential direction is formed on the upper end of the outer surface of the upper portion 24 of the gripping piece 8. The extending portion 26 of the gripping piece 8 has a ring shape and extends downward beyond the lower end of the skirt wall 6.

  The outer cylindrical wall 10 has a cylindrical shape, and as clearly shown in FIG. 3, the skirt wall 6 is interposed through a plurality of breakable portions 34 whose lower ends on the inner peripheral surface are spaced apart in the circumferential direction. It is connected to the annular shoulder surface 14 formed on the outer peripheral surface of the. Accordingly, the outer cylindrical wall 10 extends upward from the annular shoulder surface 14 of the skirt wall, and extends upward beyond the top wall 4. The breakable portion 34 is formed from a thin piece, and its breaking strength is sufficiently small. A plurality of protrusions 36 extending in the circumferential direction are formed at appropriate intervals in the circumferential direction at the lower portion of the inner circumferential surface of the outer cylindrical wall 10. Further, on the inner peripheral surface of the outer cylindrical wall 10, as shown by a broken line in FIG. 2 and a solid line in FIG. 3, the angular positions of the two pressed protrusion-like nonexistent portions 22 on the outer peripheral surface of the skirt wall 6. Two constraining protrusions 38 extending in the axial direction are formed. The circumferential width of the restraining protrusion 38 is made to correspond to the circumferential width of the pressed protrusion non-existing portion 22. Conveniently, the circumferential width of the constraining protrusion 38 is gradually reduced downward. If desired, instead of forming a plurality of protrusions 36 extending in the circumferential direction at intervals in the circumferential direction, protrusions extending continuously in the circumferential direction except for the portion where the restraining protrusions 38 exist are provided. It can also be formed.

  Continuing the description with reference to FIGS. 5 and 6, the container lid 2 as described above is applied to a container having the mouth and neck portion 40. The container may be formed of a suitable synthetic resin such as glass, polyethylene terephthalate, or a metal thin plate, and may have a well-known shape. The container has a substantially cylindrical mouth-and-neck portion 40 and has an upper surface opened. A locking jaw portion 42 is formed at the upper end portion of the outer peripheral surface of the portion 40. When the container lid 2 is attached to the mouth / neck portion 40 of such a container and the mouth / neck portion 40 is sealed, the container lid 2 is fitted on the mouth / neck portion 40 and the top wall 4 is forced downward. . Thus, as shown in FIG. 5, the locking ridge 18 formed on the inner peripheral surface of the skirt wall 6 elastically climbs over the locking jaw portion 42 formed on the outer peripheral surface of the mouth-and-neck portion 40. It is locked under the lever. Further, the annular seal piece 12 disposed on the inner surface of the top wall 4 enters the mouth / neck portion 40 to seal the mouth / neck portion 40. Next, the outer cylindrical wall 10 in the container lid 2 is forced downward to be lowered from the position illustrated in FIG. 5 to the position illustrated in FIG. 6. As clearly understood by comparing FIGS. 5 and 6, the outer cylindrical wall 10 with respect to the top wall 4, the skirt wall 6, and the gripping piece 8 that is prevented from being lowered by the mouth-and-neck portion 40 of the container. Is relatively lowered, the breakable portion 34 is broken and the outer cylindrical wall 10 is separated from the skirt wall 6. And the protrusion 36 formed in the inner peripheral surface of the outer cylindrical wall 10 is a protrusion formed on the upper outer surface of the gripping piece 8 together with the pressed protrusion 20 formed on the outer peripheral surface of the skirt wall 6. 32 is elastically climbed over and locked below it. The inner diameter of the portion of the inner peripheral surface of the outer cylindrical wall 10 above the protrusion 36 is set slightly smaller than the outer diameter of the pressed protrusion 20 posted on the outer peripheral surface of the skirt wall 6. A force forcing radially inward from the cylindrical wall 10 to the skirt wall 6, that is, a compression force, is applied, so that the skirt wall 6 is sufficiently firmly attached to the mouth / neck portion 40 of the container. The constraining protrusions 38 formed on the inner surface of the outer cylindrical wall 10 enter the pressed protrusion non-existing portion 22 on the outer peripheral surface of the skirt wall 6, whereby the top wall 4, the skirt wall 6, and the gripping piece 8. The outer cylindrical wall 10 is prevented from rotating relatively.

  When opening the mouth-and-neck portion 40 of the container, a finger is put on the ring-shaped extending portion 26 to force the gripping piece 8 outward and upward in the radial direction. In this way, as shown in FIG. 7, the gripping piece 8 is swung counterclockwise in FIG. 7 with the connecting portion 28 (FIGS. 1 and 3) as the pivot center. The easy-to-break portion 30 (FIG. 1) is broken at the beginning of the turning movement of the gripping piece 8, thereby clearly indicating that the opening operation has been performed, and so-called tamper evidence characteristics are ensured. When the gripping piece 8 is swung to the position shown in FIG. 7, the upper part 24 of the gripping piece 8 abuts the lower edge of the outer cylindrical wall 10, as will be understood by referring to FIGS. 7 and 8. As the gripping piece 8 turns, the outer cylindrical wall 10 is turned counterclockwise around the right end in FIGS. 7 and 8 and gradually separated from the periphery of the skirt wall 6. When a corresponding portion of the outer cylindrical wall 10 is detached upward from the skirt wall 6, the pressure of the skirt wall 6 by the outer cylindrical wall 10 is released, and therefore the gripping piece 8 is moved upward or rightward in FIG. When forced, the locking ridges 18 of the skirt wall 6 are gradually and elastically detached from the locking jaws 42 of the mouth / neck 40, and the top wall 4 and the skirt wall 6 are detached from the mouth / neck 40, thus. The mouth and neck 40 is opened. When the opening operation such as the mouth-and-neck portion 40 is performed, the restraining protrusion 38 (FIGS. 2, 3, and 5) of the outer cylindrical wall 10 enters the pressed protrusion-like existence portion 22 of the skirt wall 6. Thus, the outer cylindrical wall 10 is prevented from being completely detached from the skirt wall 6 until at least a substantial part of the skirt wall 6 is detached from the mouth / neck portion 40.

  FIG. 9 illustrates a variation of a container lid constructed in accordance with the present invention. In the container lid 102 shown in FIG. 9, the upper end edge of the gripping piece 108 is connected to the skirt wall 106 through a relatively thin connection portion 128 instead of the both sides in the circumferential direction of the upper portion. In such a modified example, when the container lid 102 is detached from the mouth / neck portion of the container and the mouth / neck portion is opened, the gripping piece 108 is swiveled around the upper edge or the connecting portion 128 as a turning center. . The remaining configuration of the container lid 102 illustrated in FIG. 9 is substantially the same as that of the container lid 2 illustrated in FIGS.

2: Container lid 4: Top wall 6: Skirt wall 8: Gripping piece 10: Outer cylindrical wall 16: Opening 18: Locking protrusion 20: Pressed protrusion 22: Pressed protrusion non-existing part 24: Holding piece 26: Extending portion of gripping piece 28: Connection portion 30: Easy breakable portion 34: Breakable portion 36: Protruding shape 38: Restraining protruding shape 40: Mouth and neck portion 42: Locking jaw portion 102: Container lid 106 Skirt Wall 108: Grasping piece 128: Connection part

Claims (9)

  A top wall, a cylindrical skirt wall depending from the peripheral edge of the top wall, an upper part connected to the skirt wall, a gripping piece extending downward beyond the skirt wall, and an outer cylindrical shape And the inner peripheral surface of the outer cylindrical wall is connected to the outer peripheral surface of the skirt wall via a plurality of breakable portions arranged at intervals in the circumferential direction. A container lid integrally formed from a synthetic resin, the tubular wall extending upward beyond the top wall.   The container lid according to claim 1, wherein the extending portion of the gripping piece has a ring shape.   An opening opened downward is formed in the skirt wall, the upper part of the gripping piece is located in the opening, and the skirt wall is connected by a connection portion extending in the circumferential direction on both sides in the circumferential direction of the upper part of the gripping piece. The container lid according to claim 1, which is connected to the container.   The container lid according to claim 2, wherein an upper end edge of the gripping piece is connected to the skirt wall via a connection portion.   The container lid according to claim 3 or 4, wherein both sides in the circumferential direction of the upper part of the gripping piece are connected to the skirt wall via easy-to-break parts positioned below the connection part.   The container lid according to any one of claims 1 to 5, wherein a lower end of the inner peripheral surface of the outer cylindrical wall is connected to an upper portion of the outer peripheral surface of the skirt wall via the breakable portion.   A plurality of locking protrusions extending in the circumferential direction are formed on the inner peripheral surface of the skirt wall, and the outer peripheral surface of the skirt wall extends in the circumferential direction at intervals in the circumferential direction. The container lid according to any one of claims 1 to 6, wherein a plurality of pressed protrusions are formed, and a lower end of the outer cylindrical wall is positioned above the annular pressed protrusion.   8. The lower end portion of the inner peripheral surface of the outer cylindrical wall is formed with a protrusion extending continuously in the circumferential direction or a plurality of protrusions extending in the circumferential direction at intervals in the circumferential direction. The container lid according to any of the above.   In each of the two regions having an angular interval of 90 to 120 degrees on both sides in the circumferential direction from the circumferential center of the gripping piece, the pressed ridges present on the circumferential side on the outer circumferential surface of the skirt wall A non-existing portion of the compressed ridge generated in between is disposed, and is positioned on the inner peripheral surface of the outer cylindrical wall in alignment with the non-existing portion of the compressed ridge in the circumferential direction and in the axial direction. The container lid according to any one of claims 1 to 8, wherein a constraining protrusion that extends is formed.

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