JP2012201380A - Synthetic resin-made container lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a projecting piece from abutting on a locking means (28) disposed on an inner circumferential surface of a tamper-evident skirt part before the projecting piece rides over a locking jaw part (72) of a neck part in turning a body detached from the neck part (68) of a container with respect to the tamper-evident skirt part in a synthetic resin-made container lid (2) including a body (4) and a tamper-evident skirt part (6) which includes on an inner circumferential surface a locking means connected to the body via a pair of non-broken connection pieces (40a, 40b) and a plurality of break-crosslinking parts (64) and locked to a locking jaw part and further includes a projecting piece (34) downwardly projected on a skirt wall (10) of the body.SOLUTION: A cutout (64) for avoiding any interference of a projecting piece is formed on an extension end of a locking piece (62a) constituting a locking means at an angular position at which the projecting piece is present.

Description

  The present invention relates to a synthetic resin container lid having tamper-evident characteristics that prevents the entire container lid from being separated from the container even after the opening of the mouth and neck of the container. Including a pair of non-breaking connecting pieces and a tamper evidence skirt connected by forming a plurality of broken bridging parts, even if the bridging part is broken and the main body is detached from the mouth and neck of the container, The present invention relates to a synthetic resin container lid of a type in which a main body is continuously connected to a tamper evidence skirt that is continuously attached to a mouth and neck of a container via a non-breaking connecting piece.

  As a synthetic resin container lid with tamper evident characteristics applied to a container in which a male thread and a locking jaw part located below the male thread are formed on the outer peripheral surface of the mouth and neck, The following Patent Document 1 has a circular top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and a female thread that is screwed onto the male thread is formed on the inner peripheral surface of the skirt wall. A tamper, which is connected to the main body via a pair of non-breaking connecting pieces and a plurality of broken bridging portions, and is provided with locking means to be locked to the locking jaws on the inner peripheral surface A synthetic resin container lid including an evidence skirt is disclosed. A projecting piece projecting downward is formed on the skirt wall, a notch for receiving the projecting end of the projecting piece is formed on the tamper evidence skirt, and the pair of non-breaking connecting pieces are adjacent to the projecting piece. It arrange | positions at the direction both sides, and the some fracture | rupture bridging part is arrange | positioned at intervals in the circumferential direction in area | regions other than the area | region where a protrusion piece and a pair of non-breaking connection piece exist. Each of the pair of non-breaking connecting pieces has a tilting portion whose tilt angle with respect to the vertical line is gradually decreased when the main body is moved upward with respect to the tamper evidence skirt.

  When opening the mouth and neck portion of the container, the main body is rotated in the opening direction to gradually release the screwing of the female thread with respect to the male thread. In this way, the main body is gradually raised with respect to the mouth and neck, but the tamper evidence skirt is prevented from rising because the locking means is locked to the locking jaw of the mouth and neck, and therefore the break bridge Stress is generated in the part, and the fractured bridge part is broken. On the other hand, the non-breaking connecting piece is not broken, although the tilt angle of the tilting portion is gradually decreased. Therefore, even if the main body is detached from the mouth-neck portion of the container, the main body is continuously connected to the tamper-evidence hem portion continuously attached to the mouth-neck portion via the pair of non-breaking connection pieces. In order to displace the main body from above the mouth and neck of the container, when the main body is swung with respect to the tamper evidence skirt with the predetermined part of the pair of non-breaking connecting pieces as the swiveling center, the protruding piece disposed on the main body Elastically climbs over the locking jaw of the mouth and neck, whereby the body is pivoted and held in a position displaced from above the mouth and neck. When the protruding piece elastically climbs over the locking jaw, sound is generated due to the elastic recovery of the protruding piece and contact with the upper surface side of the locking jaw.

JP 2010-18290 A

  According to the experience of the present inventors, the conventional synthetic resin container lid as described above has the following problems to be solved. When the main body, which has been detached from the mouth and neck of the container, is swung with respect to the tamper evident hem, the protruding piece is placed on the inner peripheral surface of the tamper evident hem prior to overcoming the locking jaw. Locking means provided (the locking means are a plurality of arc-shaped locking pieces extending radially inward and upward at intervals in the circumferential direction, or extending in the circumferential direction and extending radially. Which consists of an annular locking piece extending inwardly and upwardly, which prevents the pivoting movement of the body and also generates a sound. The sound generated when the main body gets over the locking jaw of the mouth and neck and is turned to the required position is preferable because it allows the consumer to recognize that the main body has been turned to the required position. If sound is generated while turning to the required position, it means that the consumer mistakes that, for example, a part of the container lid is damaged, and the consumer interrupts the turning of the main body when the sound is generated. This is not preferable.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that when the main body released from the mouth and neck of the container is swung with respect to the tamper evidence skirt, the protruding piece is engaged. Prior to overcoming the stop jaw, avoiding contact with the locking means disposed on the inner peripheral surface of the tamper evidence hem, avoiding the above-mentioned problems existing in the conventional container lid. It is to solve.

  In order to avoid the protruding piece coming into contact with the locking means when the main body is swung, it may be intended to omit the locking means at the angular position where the protruding piece exists. However, since the notch that receives the protruding end of the protruding piece of the tamper evidence hem at the angular position where the protruding piece exists is formed, the axial dimension of the tamper evidence skirt is locally reduced, Therefore, the strength of the tamper evidence skirt is locally reduced. If the locking means is omitted, the local strength reduction of the tamper evidence skirt is promoted. Therefore, in the present invention, a notch for avoiding interference of the protruding piece is formed at the extended end portion of the locking piece constituting the locking means at the angular position where the protruding piece exists, and thus the local portion of the tamper evidence skirt is formed. As a result, it is possible to reliably prevent the protruding piece from coming into contact with the locking means by suppressing the reduction of the mechanical strength as much as possible.

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 the container being
A main body having a circular top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, and a female thread that is screwed onto the male thread is formed on the inner peripheral surface of the skirt wall; The tamper-evidence hem is connected to the main body through a non-breaking connecting piece and a plurality of broken bridging portions, and an inner peripheral surface is provided with a locking means to be locked to the locking jaw. Including
A projecting piece projecting downward is formed on the skirt wall, a notch for receiving a projecting end of the projecting piece is formed on the tamper evidence skirt, and the pair of non-breaking connecting pieces are adjacent to the projecting piece. And the plurality of fractured bridging portions are arranged at intervals in the circumferential direction in a region other than the region where the projecting piece and the pair of non-breaking connection pieces exist. Each of the non-breaking connecting pieces has a tilting portion whose tilt angle with respect to the vertical line is gradually reduced when the main body is moved upward with respect to the tamper evidence skirt,
The locking means disposed on the inner peripheral surface of the tamper evidence skirt has a plurality of arc-shaped locking pieces extending radially inward and upward at intervals in the circumferential direction or continuous in the circumferential direction. In the synthetic resin container lid composed of an annular locking piece extending inward and upward in the radial direction,
In the angular position where the protruding piece is disposed, a notch for avoiding interference of the protruding piece is formed in the extended end portion of the arc-shaped locking piece or the annular locking piece. A synthetic resin container lid is provided.

  In the present invention, due to the presence of the notch formed in the arc-shaped locking piece or the annular locking piece, the projecting piece becomes the arc-shaped locking piece or the annular locking piece when the main body is turned with respect to the tamper evidence skirt. Contact is reliably avoided. At the angular position where the projecting piece exists, the locking piece is not omitted, but the arc-shaped locking piece or the annular locking piece is formed with a minimum necessary notch, so that the tamper evidence hem is locally Strength reduction is suppressed as much as possible.

The front view which shows suitable embodiment of the container lid comprised according to this invention. The rear view which shows a part of cross section of the container lid of FIG. The bottom view of the container lid of FIG. The front view which shows the state which mounted | wore the mouth neck part of the container with the container lid of FIG. The front view which shows the opening operation intermediate state which rotated the main body to the opening direction and made it raise in order to detach | leave the main body of the container lid of FIG. 1 from the opening neck. FIG. 2 is a cross-sectional view showing a state in which the main body of the container lid of FIG. 1 is somewhat swiveled with respect to the tamper evidence hem after being detached from the mouth and neck. Sectional drawing which shows the state which removed the main body of the container lid of FIG. 1 from the mouth neck part of the container, and was hold | maintained in the predetermined position.

  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. 1-3 which illustrate a preferred embodiment of a synthetic resin container lid constructed in accordance with the present invention, it may be expediently made 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. On the inner surface of the top wall 8 are formed three protrusions 14 extending in the radial direction at equal intervals in the circumferential direction and three protrusions 16 disposed between the adjacent protrusions 14 and extending in an arc shape. Two seal ridges, that is, an inner annular ridge 18 and an outer annular ridge 20 are formed on the inner surface of the top wall 8. Concavities and convexities 22 are repeatedly formed on the outer peripheral surface of the skirt wall 10 to prevent slipping of the fingers hung thereon. A female thread 24 is formed on the inner peripheral surface of the skirt wall 10. The female thread 24 is formed with notches 26 at intervals in the circumferential direction. The tamper evidence skirt portion 6 has a cylindrical shape as a whole, and is connected to the skirt wall 10 of the main body via a breakage bridge portion and a pair of non-breakage connection pieces described later. Locking means 28 is disposed on the inner peripheral surface of the tamper evidence skirt 6 (the lock means 28 will be described in more detail later).

  1 to 3, 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 numeral 30, and the tamper shrimp. The upper edge of the dent skirt 6 is displaced below the upper edge of the other region, and a substantially horizontally long rectangular opening 32 is formed between the skirt wall 10 and the tamper evidence skirt 6 in the front view. Has been generated. A substantially rectangular protruding piece 34 that protrudes downward is formed on the skirt wall 10 at the circumferential center of the opening 32. As clearly understood by referring to FIG. 7 in conjunction with FIG. 1, the projecting piece 34 hangs down substantially vertically and then hangs down substantially vertically after being slightly displaced radially outwardly. A step 36 is formed. Corresponding to the protruding piece 34, the tamper evidence skirt 6 is formed with a notch 38 for receiving the protruding end of the protruding piece 34.

  As clearly shown in FIGS. 1 and 2, a pair of non-breaking connection pieces 40 a and 40 b are further disposed in the opening 32 adjacent to the protruding piece 34 on both sides in the circumferential direction. In the illustrated embodiment, the non-breaking connecting piece 40a is substantially horizontally on the upper end 42a connected to the lower end edge of the skirt wall 10, and on the one side in the circumferential direction (right side in FIGS. 1 and 2) following the upper end 42a. The first tilting portion 44a, the intermediate portion 46a, and the intermediate portion 46a that extend, the second tilting portion 48a and the tamper evidence skirt 6 that extend substantially horizontally to the other circumferential side (the left side in FIGS. 1 and 2). It is comprised from the lower end part 50a connected to. The non-breaking connection piece 40b has an upper end 42b connected to the lower edge of the skirt wall 10, and a first tilt extending substantially horizontally to one side in the circumferential direction (left side in FIGS. 1 and 2) following the upper end 42b. The lower end connected to the second tilting portion 48b and the tamper evidence skirt 6 extending substantially horizontally to the other side in the circumferential direction (the right side in FIGS. 1 and 2) following the portion 44b, the intermediate portion 46b, and the intermediate portion 46b. It is comprised from the part 50b. If desired, the first tilting portion 44a and the second tilting portion 48a of the non-breaking connection piece 40a and the first tilting portion 44b and the second tilting portion 48b of the non-breaking connection piece 40b are not substantially horizontal but predetermined. It can also be tilted in the direction. In the illustrated embodiment, the non-breaking connecting piece 40a and the non-breaking connecting piece 40b are not line-symmetric, and the circumferential dimensions of the components are somewhat different. See the description of Japanese Patent Application No. 2010-222318.

  In a region other than the region indicated by numeral 30, that is, the region where the protruding piece 34 and the pair of non-breaking connecting pieces 40 a and 40 b exist, a plurality of tamper evidence skirts 6 are connected to the lower end of the skirt wall 10 of the main body 4. A plurality of, for example, six fractured bridging portions 60 are arranged at intervals in the circumferential direction. Each of the breaking bridge portions 60 may have a known form.

  As clearly understood by referring to FIG. 3 together with FIG. 2, the locking means 28 arranged on the inner peripheral surface of the tamper evidence skirt 6 are spaced apart in the circumferential direction in the illustrated embodiment. 6 arc-shaped locking pieces 62a to 62f formed in the above. Each of the arc-shaped locking pieces 62a to 62f is extended radially inward and axially upward from the inner peripheral surface of the tamper evidence skirt 6. As clearly shown in FIG. 3, the circumferential length of the arcuate locking pieces 62a disposed in the region indicated by the number 30 is somewhat longer than the circumferential length of the other arcuate locking pieces 62b to 62f. It has been. It is important that the arc-shaped locking piece 62a is formed with a notch 64 for avoiding interference of the protruding piece 34 at an angular position where the protruding piece 34 of the main body 4 is disposed. It is preferable that the notch 64 has a minimum necessary size, and therefore has a shape that matches the shape of the protruding end of the protruding piece 34. In each of the arc-shaped locking pieces other than the arc-shaped locking piece 62a, that is, the arc-shaped locking pieces 62b to 62f, a slit 66 extending radially outward from the extending end edge is formed at the circumferential intermediate portion. In the illustrated embodiment, the locking means 28 is composed of a plurality of arcuate locking pieces 62a to 62f extending radially inward and upward at intervals in the circumferential direction. Is formed at an angular position where the projecting piece 34 of the main body 4 is disposed in the annular locking piece. In addition, a notch for avoiding the interference of the protruding piece 34 can be formed.

  FIG. 4 also shows the container neck 68 of the container together with the container lid 2. The mouth-and-neck portion 68 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 screw 70 and a locking jaw 72 positioned below the male screw 70 are formed on the outer peripheral surface of the mouth and neck portion 68.

  When the container lid 2 is attached to the mouth-and-neck portion 68 and the mouth-and-neck portion 68 is sealed, the container lid 2 is fitted on the mouth-and-neck portion 68 and closed (clockwise as viewed from above in FIG. 4). The female thread 24 of the container lid 2 is screwed onto the male thread 70 of the mouth-and-neck portion 68 by rotating. The container lid 2 gradually descends with respect to the mouth-and-neck portion 68 in accordance with the progress of the threading of the female thread 24 with respect to the male thread 70. When the container lid 2 is lowered with respect to the mouth and neck portion 68 to the state shown in FIG. 4, the inner annular ridge 18 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. 20 is brought into close contact with the inner and outer peripheral surfaces of the mouth-and-neck portion 68, whereby the mouth-and-neck portion 68 is sealed. The locking means 28 disposed on the inner peripheral surface of the tamper-evidence skirt 6 of the container lid 2 elastically climbs over the locking jaw 72 of the mouth-and-neck 68 and is placed on the lower surface of the locking jaw 72. It can be locked.

  When opening the mouth and neck portion 68, the container lid 2 is rotated in the opening direction (counterclockwise as viewed from above in FIG. 4), and the female thread of the container lid 2 with respect to the male thread 70 of the mouth and neck portion 68 is rotated. The 24 engagement is gradually released. When the screwing is gradually released, the main body 4 of the container lid 2 is rotated in the opening direction and is raised, but the tamper evidence skirt 6 is locked by the locking means 28 to the locking jaw 72 of the mouth and neck 68. As a result, the rise is prevented, and due to this, a considerable stress is generated in the fracture bridge portion 60, and the fracture bridge portion 60 is broken. After that, the main body 4 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 can be clearly understood by referring to FIG. 5 in conjunction with FIG. 4, when the body 4 is gradually separated from the tamper evidence skirt 6 upward, the first tilting piece 44a and the non-breaking piece of the non-breaking connecting piece 40a. The second tilting part 48b of the connecting piece 40b is pivoted clockwise in FIGS. 4 and 5 around the respective upper and lower ends, that is, tilted clockwise, while the second tilting part 48a of the non-breaking connecting piece 40a. The first tilting portion 44b of the non-breaking connecting piece 40b is pivoted counterclockwise in FIGS. 4 and 5 around the lower end and the upper end of the non-breaking connecting piece 40b, that is, tilted counterclockwise. The tilt angles of the first tilt portions 44a and 44b and the second tilt portions 48a and 48b with respect to the vertical line in 40a and 40b are gradually reduced. As clearly understood by referring to FIG. 6 in conjunction with FIGS. 4 and 5, when the female thread 24 of the container lid 2 is completely disengaged from the male thread 70 of the mouth and neck 68, the container The main body 4 of the lid 2 is detached from the mouth / neck portion 68. However, since the body 4 continues to be connected to the tamper-evidence skirt 6 that is continuously attached to the mouth-and-neck portion 68 via the non-breaking connection pieces 40a and 40b, the body 4 is separated from the mouth-and-neck portion 68 of the container. There is nothing.

  After the main body 4 of the container lid 2 is detached from the mouth-and-neck portion 68, the main body 4 is pivoted in a direction away from the mouth-and-neck portion 68 using the non-breaking connection pieces 40a and 40b as hinge fulcrums. At this time, as clearly understood by referring to FIG. 6, since the arc-shaped locking piece 62a is formed with the notch 64, the protruding piece 34 of the main body 4 interferes with the arc-shaped locking piece 62a. It passes through the notch 64 without. When the main body 4 is swung to the state shown in FIG. 7, the protruding piece 34 elastically climbs over the locking jaw 72 of the mouth-and-neck portion 68 and comes into contact with the upper surface of the locking jaw 72. The step portion 36 formed on the upper surface of the engaging jaw 72 is engaged with the upper surface of the engaging jaw 72, whereby the main body 4 is releasably held at the position shown in FIG. 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. A sound is generated when the protruding piece 34 is elastically restored over the locking jaw 72 and comes into contact with the upper surface of the locking jaw 72, thereby confirming that the consumer has turned the body 4 to the required position. Can be recognized.

  When the eating and drinking of the contents is interrupted, the main body 4 held at the position shown in FIG. 7 is turned in the direction approaching the mouth and neck portion 68 and is fitted on the mouth and neck portion 68 again. The container lid 2 is rotated in the closing direction so that the female thread 24 of the container lid 2 is screwed into the male thread 70 of the mouth-and-neck portion 68, and thus the container lid 2 is positioned again in the state shown in FIG. The neck 68 can be temporarily sealed.

2: Container lid 4: Main body 6: Tamper evidence hem 8: Top wall 10: Skirt wall 24: Female thread 28: Locking means 34: Projection piece 40a: Non-breaking connection piece 40b: Non-breaking connection piece 60: Breaking bridge 62a: Arc-shaped locking piece 62b: Arc-shaped locking piece 62c: Arc-shaped locking piece 62d: Arc-shaped locking piece 62e: Arc-shaped locking piece 62f: Arc-shaped locking piece 64: Notch 68: Mouth and neck 70: Male thread 72: Locking jaw

Claims (1)

A synthetic resin container lid applied to a container in which a male thread and a locking jaw part located below the male thread are formed on the outer peripheral surface of the mouth and neck,
A main body having a circular top wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, and a female thread that is screwed onto the male thread is formed on the inner peripheral surface of the skirt wall; The tamper-evidence hem is connected to the main body through a non-breaking connecting piece and a plurality of broken bridging portions, and an inner peripheral surface is provided with a locking means to be locked to the locking jaw. Including
A projecting piece projecting downward is formed on the skirt wall, a notch for receiving a projecting end of the projecting piece is formed on the tamper evidence skirt, and the pair of non-breaking connecting pieces are adjacent to the projecting piece. And the plurality of fractured bridging portions are arranged at intervals in the circumferential direction in a region other than the region where the projecting piece and the pair of non-breaking connection pieces exist. Each of the non-breaking connecting pieces has a tilting portion whose tilt angle with respect to the vertical line is gradually reduced when the main body is moved upward with respect to the tamper evidence skirt,
The locking means disposed on the inner peripheral surface of the tamper evidence skirt has a plurality of arc-shaped locking pieces extending radially inward and upward at intervals in the circumferential direction or continuous in the circumferential direction. In the synthetic resin container lid, which is formed of an annular locking piece extending inward and upward in the radial direction,
In the angular position where the protruding piece is disposed, a notch for avoiding interference of the protruding piece is formed in the extended end portion of the arc-shaped locking piece or the annular locking piece. A synthetic resin container lid.

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