JP5341729B2 - Plastic container lid - Google Patents

Description

  The present invention is connected to the skirt wall of the main body through a plurality of breakable bridging portions arranged at intervals in the circumferential direction with the main body having a top wall and a skirt wall depending from the peripheral edge of the top wall. The skirt wall of the main body is provided with protruding pieces protruding downward, and the skirt wall of the main body and the tamper evidence hem are connected to both sides in the circumferential direction of the protruding piece. The present invention relates to a synthetic resin container lid in which a non-breaking connection piece is disposed.

  The following Patent Document 1 discloses a synthetic resin container lid having a tamper evidence type in which the entire container lid is not separated from the container even after the mouth and neck of the container are opened. . Such a synthetic resin container lid has a top wall and a cylindrical skirt wall that hangs from the periphery of the top wall, and the inner peripheral surface of the skirt wall is threaded on a male thread formed on the mouth and neck of the container. Connected to the skirt wall of the main body through a main body in which female threads to be fitted are formed and a plurality of breakable bridging portions arranged at intervals in the circumferential direction, and on the inner peripheral surface And a cylindrical tamper-evidence hem portion provided with locking means to be locked to a locking jaw portion formed on the mouth and neck portion of the mouth and neck. Protruding pieces projecting downward are arranged on the skirt wall of the main body, and the skirt wall of the main body and the tamper evidence skirt are connected to both sides of the protruding piece in the circumferential direction, and the tamper evidence hem is connected to the skirt wall. When the main body is moved upward, a non-breaking connecting piece having a tilting portion whose tilt angle with respect to the vertical line is gradually reduced is provided.

JP 2008-56246 A

  Furthermore, the present inventors previously included, as an improvement of the above-mentioned synthetic resin container lid, in Japanese Patent Application No. 2008-178225, each of the non-breaking connecting pieces includes two inclined portions whose directions of inclination are opposite to each other. Proposed to form. More specifically, one of the non-breaking connecting pieces has an upper end connected to the lower end edge of the skirt wall, a first tilt extending obliquely downward following the upper end or substantially horizontally to one side in the circumferential direction. The second tilting portion and the second tilting portion which are connected to the first tilting portion via the thin-walled intermediate portion and tilted downward or substantially horizontally extending to the other side in the circumferential direction. It has a lower end connected to the upper end edge of the dent hem, and the other of the non-breaking connecting pieces is an upper end connected to the lower end edge of the skirt wall. A first tilting portion extending horizontally on the other side in the circumferential direction, a second tilting portion connected to the first tilting portion via a thin intermediate portion and tilting downward or substantially horizontally extending to one side in the circumferential direction The lower end connecting the tilting part and the second tilting part to the upper end edge of the tamper evidence hem part It proposed that allowed to the form with.

  In the synthetic resin container lid including the non-breaking connecting piece in the form as described above, each of the non-breaking connecting pieces includes two inclined portions whose tilt directions are opposite to each other. Compared to the case where only the tilting part is included, the allowable elevation distance of the main body with respect to the tamper evidence hem is substantially doubled without the need to increase the circumferential dimension in which the non-breaking connecting piece exists, and the mouth and neck The present invention can also be applied to a case where the ascending distance of the main body is relatively long when the main body is detached from the. However, according to the experience of the present inventors, it has been found that such a synthetic resin container lid is still not fully satisfactory, and the following problems to be solved exist.

  First, some consumers may want the container lid body to be completely separated from the tamper-evidence hem and completely removed from the container's mouth and neck when consuming the contents in the container. is there. In this case, a relatively large force is applied to the thin middle part of the non-breaking connecting piece to break the thin middle part, thus completely detaching the main body from the tamper-evidence hem and completely detaching from the mouth and neck of the container. To do. In this case, the lower end portion and the second tilting portion of the non-breaking connecting piece that has been forcibly broken remain together with the tamper evidence skirt at the mouth and neck of the container, and the lower end portion and the second tilting portion of the non-breaking connecting piece. The portion protrudes upward from the upper end edge of the tamper evidence skirt. Therefore, if the contents are consumed by attaching the mouth to the mouth and neck of the container, the second tilting portion of the non-breaking connecting piece may come into contact with the lips of the consumer, which may cause discomfort to the consumer. There are many.

  Second, when removing the container lid body from the container neck to open the container neck and neck, it is necessary to swivel the body against the tamper evidence hem, Since the main body can be swiveled around the thin middle part connecting the first and second tilting parts of the non-breaking connecting piece with relatively small rigidity, the swiveling of the main body is always performed sufficiently smoothly. There is a great possibility that it cannot be done.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that when the consumer forcibly breaks the non-breaking connection piece, substantially the entire non-breaking connection piece is tampered with the main body. The detachment from the hem, and thus the first problem does not occur, and when the main body is further swiveled with respect to the tamper evidence hem, the main body can be swiveled sufficiently smoothly, and thus the first The object is to provide a new and improved synthetic resin container lid which does not have a second problem.

  As a result of intensive studies, the present inventors have found that the main technical problem can be achieved by thinning the lower end portion instead of thinning the intermediate portion in each of the non-breaking connection pieces. It was.

That is, according to the present invention, as a synthetic resin container lid that achieves the main technical problem described above, a male thread and a locking jaw located below the male thread are formed on the outer peripheral surface of the mouth and neck. A synthetic resin container lid applied to a container that has a top surface wall and a cylindrical skirt wall that hangs down from the peripheral edge of the top surface wall. An inner peripheral surface connected to the skirt wall of the main body through a main body in which a female thread to be screwed is formed and a plurality of breakable bridging portions arranged at intervals in the circumferential direction Includes a cylindrical tamper-evidence hem portion on which locking means to be locked to the locking jaw is disposed, and a projecting piece projecting downward is disposed on the skirt wall of the main body. The skirt wall of the main body and the tamper evidence hem are connected to both sides in the circumferential direction of the protruding piece. And a synthetic resin container lid provided with a non-breaking connecting piece having a tilting portion whose tilt angle with respect to a vertical line is gradually decreased when the main body is moved upward with respect to the tamper evidence skirt. ,
One of the non-breaking connection pieces is an upper end connected to a lower end edge of the skirt wall, a first tilting portion that is inclined downward or substantially horizontally extending to one side in the circumferential direction following the upper end, A second tilting portion connected to the first tilting portion via an intermediate portion and tilting downward or extending substantially horizontally to the other side in the circumferential direction, the second tilting portion serving as the tamper evidence A thin lower end connected to the upper end edge of the skirt, and the other of the non-breaking connecting pieces is inclined at the upper end connected to the lower end edge of the skirt wall; A first tilting portion that extends substantially horizontally to the other side in the circumferential direction, is connected to the first tilting portion via an intermediate portion, and tilts downward or extends substantially horizontally to one side in the circumferential direction. Connect the second tilting portion and the second tilting portion to the upper edge of the tamper evidence skirt. Having a wall lower portion, the synthetic resin container closure is provided, characterized in that.

  In the synthetic resin container lid of the present invention, when the consumer forcibly breaks the non-breaking connection piece, the non-breaking connection piece is a connection region between the non-breaking connection piece and the tamper-evidence skirt. The thin lower end is broken, so that substantially the entire unbroken connection piece is detached from the tamper evidence skirt with the body. In addition, when the main body is swiveled with respect to the tamper evidence skirt, the lower end of the non-breaking connection piece, which is a boundary region between the non-breaking connection piece and the tamper evidence skirt having sufficient rigidity, is the turning center. Therefore, the turning of the main body can be performed sufficiently smoothly.

The front view which shows suitable embodiment of the synthetic resin container lid comprised according to this invention. FIG. 2 is a front view partially showing a cross-section of a state in which the container lid illustrated in FIG. 1 is attached to the mouth and neck of the container and the mouth and neck are sealed. The fragmentary sectional view which shows the protrusion piece of the container lid shown in FIG. The front view which shows the state which rotated the container lid somewhat in the opening direction in order to open the mouth neck part from the state illustrated in FIG. FIG. 5 is a front view showing a state in which the container lid is further rotated in the opening direction from the state illustrated in FIG. 4, and the main body of the container lid is detached from the mouth and neck portion and held in a predetermined position. The front view which shows the state which fractured | ruptured the thin-walled lower end part of a pair of non-breaking connection piece further from the state shown in FIG. 5, and isolate | separated the main body of the container lid from the tamper evidence skirt part.

  Hereinafter, a preferred embodiment of a synthetic resin container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.

  Referring to FIGS. 1 and 2, which illustrate a preferred embodiment of a synthetic resin container lid constructed in accordance with the present invention, it can be conveniently produced by injection molding or compression molding from a suitable synthetic resin such as polyethylene or polypropylene. A container lid, generally designated 2, that can be integrally molded, includes a body 4 and a tamper evidence skirt 6. The main body 4 has a circular top wall 8 and a cylindrical skirt wall 10 depending from the periphery of the top wall 8. A circular recess 12 is formed at the center of the top surface of the top wall 8 to avoid the formation of protrusions during injection molding. Two seal ridges, that is, an inner annular ridge 14 and an outer annular ridge 16 are formed on the inner surface of the top wall 8. Concavities and convexities 18 are repeatedly formed on the outer peripheral surface of the skirt wall 10 to prevent the slipping of fingers hung thereon. A female thread 20 is formed on the inner peripheral surface of the skirt wall 10.

  The tamper evidence skirt 6 is generally cylindrical and includes a plurality of breakable bridging portions 26 (one of which is shown in FIG. 2) arranged at intervals in the circumferential direction. Are connected to the skirt wall 10 of the main body 4. The breakable bridge portion 26 may be substantially the same as the breakable bridge portion disclosed in Japanese Patent Application Laid-Open No. 2007-191206, the upper end portion is connected to the lower end portion of the inner peripheral surface of the skirt wall 10, and the lower end portion is a tamper. It is connected to the upper end of the inner peripheral surface of the evidence skirt 6. Locking means 34 is disposed on the inner peripheral surface of the tamper evidence skirt 6. The locking means 34 in the illustrated embodiment is composed of a plurality of locking pieces (one of which is shown in FIG. 2) arranged at intervals in the circumferential direction. Each of the stopper pieces is inclined inward in the radial direction from the inner peripheral surface of the tamper evidence skirt 6 and extended upward.

  The configuration of the illustrated container lid 2 as described above does not constitute a novel feature of the container lid 2 constructed in accordance with the present invention and may itself be in a well-known form, so a detailed description thereof will not be given. It is omitted in this specification.

  1 and 2, the lower end edge of the skirt wall 10 of the main body 4 is displaced above the lower end edge of the other region in the region indicated by reference numeral 42. The upper edge of the dent skirt 6 is displaced below the upper edge of the other region, and the upper edge of the tamper evidence skirt 6 is further displaced downward in the center of the region 42. In the front view, an opening 44 having a substantially horizontally long rectangular shape is formed between the skirt wall 10 and the tamper evidence skirt 6. A substantially rectangular protruding piece 46 protruding downward is formed on the skirt wall 10 at the circumferential center of the opening 44. As can be clearly understood by referring to FIG. 3, the projecting piece 46 hangs substantially vertically and then hangs substantially vertically after being slightly displaced radially outward, and has a stepped portion on its outer surface. 47 is formed.

  As clearly shown in FIGS. 1 and 2, non-breaking connection pieces 50 a and 50 b located on both sides of the protruding piece 46 are further disposed in the opening 44. The non-breaking connection piece 50a in the illustrated embodiment has an upper end portion 52a connected to the lower end edge of the skirt wall 10, and then on the one side in the circumferential direction (right side in FIGS. 1 and 2) following the upper end portion 52a. The first tilting portion 54a extending substantially horizontally, the intermediate portion 56a extending slightly downward from the extending end portion of the first tilting portion 54a, and the other side in the circumferential direction facing the lower portion following the intermediate portion 56a (FIG. 1 and FIG. 2 (left side in FIG. 2) substantially horizontally and composed of a second tilting portion 58a and a lower end portion 60a that extends slightly downward from the extended end portion of the second tilting portion 58a and is connected to the tamper evidence skirt portion 6. Has been. The lower end portion 60a of the non-breaking connection piece 50a is thin, in other words, thicker than other portions, that is, the upper end portion 52a, the first tilting portion 54a, the intermediate portion 56a, and the second tilting portion 58a. It is important that this is reduced. The non-breaking connecting piece 50b is line symmetrical with the non-breaking connecting piece 50a, and has an upper end portion 52b connected to the lower end edge of the skirt wall 10, and the other end in the circumferential direction downward (see FIG. 1). And the left side in FIG. 2) the first tilting portion 54b extending substantially horizontally, the intermediate portion 56b extending slightly downward from the extending end of the first tilting portion 54b, and the periphery facing downward following the intermediate portion 56b. The second tilting portion 58b extending substantially horizontally on one side of the direction (right side in FIGS. 1 and 2) and the extending end portion of the second tilting portion 58b extend slightly downward and are connected to the tamper evidence skirt portion 6. It is comprised from the lower end part 60b. The lower end portion 60b of the non-breaking connecting piece 50b is thin, in other words, thicker than other portions, that is, the upper end portion 52b, the first tilting portion 54b, the intermediate portion 56b, and the second tilting portion 58b. It is important that this is reduced. The thicknesses of the upper end portions 52a and 52b, the first tilt portions 54a and 54b, the intermediate portions 56a and 56b, and the second tilt portions 58a and 58b in the non-breaking connection pieces 50a and 50b are about 0.4 to 1.2 mm. The thickness of the lower end portions 60a and 60b of the non-breaking connection pieces 50a and 50b may be about 0.2 to 0.4 mm. If desired, the first tilting part 54a and the second tilting part 58a in the non-breaking connection piece 50a and the first tilting part 54b and the second tilting part 58b in the non-breaking connection piece 50b are not horizontal but downward. It can also be made to extend somewhat inclined.

  Continuing the description with reference to FIG. 2, the mouth-and-neck portion 64 of the container, which can be formed from an appropriate synthetic resin such as polyethylene terephthalate or glass, has a cylindrical shape as a whole, and its upper surface is opened. A male thread 66 and a locking jaw 68 positioned below the male thread 66 are formed on the outer peripheral surface of the mouth and neck portion 64. As shown in FIGS. 5 and 6, the male thread 66 is formed with ventilation notches 67 at intervals in the circumferential direction.

  When the container lid 2 is attached to the mouth-and-neck portion 64 and the mouth-and-neck portion 64 is sealed, the container lid 2 is fitted on the mouth-and-neck portion 64 and closed (clockwise as viewed from above in FIG. 2). The female thread 20 of the container lid 2 is screwed together with the male thread 66 of the mouth-and-neck part 64 by rotating. As the female thread 20 is engaged with the male thread 66, the container lid 2 gradually descends with respect to the mouth-and-neck portion 64. When the container lid 2 is lowered with respect to the mouth-and-neck portion 64 to the state shown in FIG. 2, the inner annular ridge 14 and the outer annular ridge formed on the inner surface of the top wall 8 in the main body 4 of the container lid 2. 16 are respectively brought into close contact with the inner peripheral surface and the outer peripheral surface of the mouth-and-neck portion 64, whereby the mouth-and-neck portion 64 is sealed. The locking means 34 disposed on the inner peripheral surface of the tamper evidence skirt 6 of the container lid 2 elastically climbs over the locking jaw 68 of the mouth-and-neck 64 and is placed on the lower surface of the locking jaw 68. It can be locked.

  When opening the mouth and neck portion 64, the container lid 2 is rotated in the opening direction (counterclockwise as viewed from above in FIG. 2), and the female thread of the container lid 2 with respect to the male thread 66 of the mouth and neck portion 64 is rotated. The 20 screwing is gradually released. When the screwing is gradually released, the main body 4 of the container lid 2 is rotated and lifted in the opening direction, but the tamper evidence skirt 6 is locked by the locking means 34 to the locking jaw 68 of the mouth and neck 64. As a result, the rise is prevented, and due to this, a considerable stress is generated in the breakable bridge 26 and the breakable bridge 26 is broken. After that, the main body 2 of the container lid 2 rises with the rotation in the opening direction, and is gradually separated upward from the tamper evidence skirt 6. As clearly understood by referring to FIG. 4 in conjunction with FIG. 2, when the body 4 is gradually spaced upward from the tamper evidence skirt 6, the first tilting piece 54a of the non-breaking connecting piece 50a and the non-breaking The second tilting portion 58b of the connecting piece 50b is pivoted clockwise in FIGS. 2 and 4 around the respective upper and lower ends, that is, tilted clockwise, while the second tilting piece 58a of the non-breaking connecting piece 50a. The first tilting portion 54b of the non-breaking connecting piece 50b is pivoted counterclockwise in FIGS. 2 and 4 around the lower end and the upper end of the non-breaking connecting piece 50b, that is, tilted counterclockwise. The inclination angle α of the first tilting parts 54a and 54b and the second tilting parts 58a and 58b at 50a and 50b with respect to the vertical line is gradually reduced. As clearly understood by referring to FIG. 5 together with FIGS. 2 and 4, when the female thread 20 of the container lid 2 is completely disengaged from the male thread 66 of the mouth and neck 64, the container The main body 4 of the lid 2 is detached from the mouth / neck portion 64. However, the main body 4 is separated from the container's mouth and neck 64 because it continues to be connected to the tamper evidence skirt 6 that is still attached to the mouth and neck 64 via the non-breaking connection pieces 50a and 50b. There is nothing.

  In the container lid 2 constructed in accordance with the present invention, the non-breaking connecting pieces 50a and 50b have two tilting portions whose tilt directions are opposite to each other, that is, the first tilting portion 54a and the second tilting portion 58a and the first tilting portion. 2 and the second tilting portion 58b, the main body 2 with respect to the tamper evidence skirt 6 is provided in spite of the relatively small circumferential dimension of the non-breaking connecting pieces 50a and 50b. Is allowed to be spaced upwards over a substantial length. Therefore, even when the main body 2 needs to be lifted over a considerable length in order to detach the main body 2 from the mouth / neck portion 64, the main body 2 can be moved to the mouth / neck portion without causing any particular problem. 64 can be disengaged.

  After the main body 4 of the container lid 2 is detached from the mouth-and-neck portion 64, the main body 4 is moved away from the mouth-and-neck portion 64 with the thin lower end portions 60 a and 60 b of the non-breaking connection pieces 50 a and 50 b as hinge fulcrums. Turn to the state shown in FIG. In this way, the outer surface of the lower end (front end) of the protruding piece 46 formed on the main body 4 abuts on the upper surface of the locking jaw 68 of the mouth-and-neck portion, and the step formed on the outer surface of the protruding piece 46. 47 is locked to the upper surface of the locking jaw portion 68, and the lower end of the skirt wall 10 of the main body 4 abuts against the outer peripheral surface of the tamper evidence skirt portion 6, so that the main body 4 is in the position shown in FIG. It is held releasably. Therefore, the consumer can eat and drink contents such as a soft drink present in the container without being obstructed by the presence of the main body 4. Since the thin lower end portions 60a and 60b are boundary regions between the non-breaking connection pieces 50a and 50b and the tamper evidence skirt 6 having sufficient rigidity, the turning of the main body 4 as described above can be performed sufficiently smoothly. it can.

  When the eating and drinking of the contents is interrupted halfway, the main body 4 held at the position shown in FIG. 5 is turned in the direction approaching the mouth and neck portion 64 and is fitted on the mouth and neck portion 64 again. The container lid 2 is rotated in the closing direction so that the female thread 20 of the container lid 2 is screwed into the male thread 66 of the mouth-and-neck portion 64, and thus the container lid 2 is positioned again in the state shown in FIG. The neck 64 can be temporarily sealed.

  On the other hand, when the consumer desires to completely separate the main body 4 of the container lid 2 from the mouth-and-neck part 64, the thin bottom end of the non-breaking connection pieces 50a and 50b is grasped and pulled in the required direction. Stress is applied to 60a and 60b to forcibly break the thin lower end portions 60a and 60b, and as shown in FIG. 6, the main body 4 is separated from the tamper-evidence skirt portion 6 and completely separated from the mouth and neck portion 62. Can do. Since the thin lower end portions 60a and 60b are broken and the main body 4 is separated from the tamper evidence skirt portion 6, the non-breaking connection pieces 50a and 50b are partially left on the mouth and neck portion 62, and the lips of the consumer It is reliably avoided that the remaining portions of the non-breaking connection pieces 50a and 50b come into contact with each other and give the consumer unpleasant feeling.

2: Container lid 4: Main body 6: Tamper evidence hem 8: Top wall 10: Skirt wall 20: Female thread 26: Breakable bridge 34: Locking means 46: Protruding piece 50a: Non-breaking connecting piece 50b : Non-breaking connection piece 52a: upper end portion 52b: upper end portion 54a: first tilting portion 54b: second tilting portion 56a: intermediate portion 56b: intermediate portion 58a: second tilting portion 58b: second tilting portion 60a : Lower end (thin wall lower end)
60b: Lower end (thin lower end)
64: Mouth and neck 66: Male thread 68: Locking jaw

Claims (1)

A synthetic resin container lid applied to a container in which a male thread and a locking jaw part positioned below the male thread are formed on an outer peripheral surface of the mouth and neck, the top wall and the top wall A cylindrical skirt wall that hangs down from the peripheral edge of the skirt wall, and an inner peripheral surface of the skirt wall is provided with a main body formed with a female thread that is screwed to the male thread, and is spaced apart in the circumferential direction. A cylindrical shape that is connected to the skirt wall of the main body through a plurality of breakable bridging portions, and is provided with a locking means that is locked to the locking jaw on the inner peripheral surface. The skirt wall of the main body is provided with projecting pieces protruding downward, and the skirt wall of the main body and the tamper shrimp are disposed on both sides in the circumferential direction of the projecting piece. Connected to the dent hem and vertically moved when the body is moved upward relative to the tamper evidence hem. In the synthetic resin container closure unbroken connecting pieces are disposed with a tilt portion inclination angle is gradually made to decrease with respect to,
One of the non-breaking connection pieces is an upper end connected to a lower end edge of the skirt wall, a first tilting portion that is inclined downward or substantially horizontally extending to one side in the circumferential direction following the upper end, A second tilting portion connected to the first tilting portion via an intermediate portion and tilting downward or extending substantially horizontally to the other side in the circumferential direction, the second tilting portion serving as the tamper evidence A thin lower end connected to the upper end edge of the skirt, and the other of the non-breaking connecting pieces is inclined at the upper end connected to the lower end edge of the skirt wall; A first tilting portion that extends substantially horizontally to the other side in the circumferential direction, is connected to the first tilting portion via an intermediate portion, and tilts downward or extends substantially horizontally to one side in the circumferential direction. Connect the second tilting portion and the second tilting portion to the upper edge of the tamper evidence skirt. Having a wall lower portion, the synthetic resin container closure, characterized in that.

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