JP2008184165A - Synthetic resin cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin cap which is capable of fixing the cap opened from a container mouth part to the container mouth part, and enhancing the convenience of attaching/detaching the cap. <P>SOLUTION: The synthetic resin cap includes a top face wall 4 and a cylindrical skirt wall 6 hanging from the circumferential edge of the top face wall. A plurality of weakened parts 12 are provided circumferentially on the lower end of the skirt wall with spaces. A tamper-evident band 16 is formed below the weakened parts. Female threads 20 are formed on the inner circumferential surface of the skirt wall, and male threads are formed on the outer circumferential surface of the container mouth part Y so as to be thread-engaged to the female threads; and a locking projecting part 16D is formed in a downwardly projecting manner from the lower end of the skirt wall. The lower end of the skirt wall has a tongue-shaped cap locking part 6A so as to project downward. A cap locking part 6A of the cap 2 after being opened from the container mouth part is inserted between an inner circumferential surface 16N of the tamper-evident band and the locking projecting part, and locked thereto. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a synthetic resin cap that is used by being attached to a container mouth such as a plastic bottle, and more particularly relates to a synthetic resin cap provided with a mechanism for temporarily locking and holding an opened cap.

In recent years, beverage containers called plastic bottles and bottle cans are often drunk by holding the cap by hand after opening and putting the mouth on the mouth of the drinking container. At that time, the cap that has been opened may be left in the other hand or beside it to reseal. However, since the cap is small, it may be lost or accidentally dropped, making it impossible to reseal drink containers, and once a cap is dropped, it is difficult to reuse it from a hygienic point of view. It is.
For this reason, a mechanism for temporarily locking the cap detached from the container opening to the container main body is desired. For example, the following documents are related to such a cap locking mechanism.

Patent Document 1 describes a plastic bottle provided with a hook at a container mouth and an opened cap hung on the hook.
Patent Document 2 describes a PET bottle with a cap holder function in which a clip clip-type cap holder portion is provided at a container mouth portion of a PET bottle, and a part of a cap side wall surface is sandwiched and held from the inside and the outside.
Japanese Patent Laid-Open No. 2005-53572 JP 2006-82875 A

  However, in the above-mentioned Patent Documents 1 and 2, a protrusion-like thing (called a hook) that grips the cap protrudes from the outer periphery of the cap of the filled container, and there is a danger such as chute clogging in the existing filling line, There is also a possibility that the hook protruding from the outer periphery of the cap may be damaged.

  The present invention has been made to solve the above-described conventional problems, and is capable of fixing a cap opened from the container mouth to the container mouth, and improving the convenience of attaching and detaching the cap. The purpose is to provide.

(1) The synthetic resin cap of the present invention has a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a plurality of lower ends of the skirt wall provided at intervals in the circumferential direction. A container opening having a tamper evident band formed through the weakened portion, a female thread formed on the inner peripheral surface of the skirt wall, and a male thread on the outer peripheral surface and a locking projection below the male thread. In the synthetic resin cap that can be wrapped around
At the lower part of the skirt wall, a tongue-like cap locking part that protrudes downward from the lower end of the skirt wall is formed. After the cap is opened from the container mouth, the cap locking part is located inside the tamper evidence band. It is formed to be able to be locked between the peripheral surface and the locking protrusion.

(2) The synthetic resin cap of the present invention is characterized in that, in (1), the skirt wall corresponding to the left and right ends of the cap locking portion is provided with a slit extending upward from the lower end of the skirt wall. have.

(3) In the synthetic resin cap of the present invention, in the above (1) or (2), a notch is provided in a part on the inner peripheral surface side of the upper end of the tamper-evident band, and the cap locking portion is the notch It is also characterized in that it can be locked between the inner peripheral surface of the portion and the locking protrusion.

(4) The synthetic resin cap of the present invention is also characterized in that, in the above (1) to (3), a plurality of notches are provided on the upper end side of the inner peripheral surface of the tamper evident band. .

(5) The synthetic resin cap of the present invention is characterized in that, in the above (1) to (4), the cap locking portion is provided with a thin portion in which a part of the thickness is reduced. is doing.

(6) In the synthetic resin cap of the present invention, in the above (1) to (5), a concave portion is provided at a position corresponding to the cap locking portion on the upper end side of the tamper evident band. Another feature is that an inclined surface that is inclined downward from the downstream end in the opening direction toward the bottom of the recess is provided.

According to the present invention, there is provided a tongue-like cap locking portion that can be locked between the inner peripheral surface of the tamper-evident band and the locking protrusion after the cap is opened from the container mouth. Because
The tip can be securely inserted and fixed between the inner peripheral surface of the tamper-evident band and the locking projection provided at the container mouth, which can improve the convenience of attaching and detaching the cap. In addition, in the supply process until the cap is put on the container, the cap locking portion does not protrude greatly to the outside, so that the cap can be supplied smoothly.

The synthetic resin cap of this embodiment has a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a plurality of weakenings are provided at the lower end of the skirt wall at intervals in the circumferential direction. A tamper evidence band is formed below the weakened portion.
Further, a female thread is formed on the inner peripheral surface of the skirt wall, and a male thread is formed on the outer peripheral surface of the container mouth so that the female thread is engaged with the female thread, and a locking protrusion is formed below the male thread. The part is formed.
Furthermore, a tongue-like cap locking part is formed in the lower part of the skirt wall so as to protrude downward from the lower end of the skirt wall, and the cap locking part of the cap after opening from the container mouth part, The tamper evident band is configured to be inserted and locked between the inner peripheral surface of the tamper evident band and the locking projection.

  Synthetic resin caps are used for metal cans with a male thread formed on the mouth of steel or aluminum filled with beverages, etc., and on the mouth of containers such as glass bottles and plastic bottles, via tamper-evidence bands. Installed. Examples of the material of the synthetic resin cap include various plastics such as low, medium and high density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene, ABS resin, and the like, and can be manufactured by injection molding or compression molding. it can.

  The tamper-evident band is a mechanism for clearly showing the opening history to prevent unauthorized refilling and mischief and to ensure the safety and quality of the filling, and when the cap is rotated in the opening direction, The weakened portion provided below the skirt wall is broken and separated from the cap body.

  The cap locking part is a tongue-shaped part protruding downward from the lower end of the skirt wall, and the cap locking part of the synthetic resin cap detached from the container mouth is connected to the inner peripheral surface of the tamper-evident band. And the cap projection that is provided below the outer peripheral surface of the container mouth portion, the cap body that has been detached is locked to the bottle container.

  In the synthetic resin cap of the present embodiment, slits extending upward from the lower end of the skirt wall may be provided on the skirt walls corresponding to the left and right ends of the cap locking portion. As a result, the cap locking portion is easily deformed, and the tip of the cap locking portion can be reliably inserted between the inner peripheral surface of the tamper evident band and the locking projection provided on the container mouth portion. The convenience of attaching and detaching can be further improved, and in the supply process until the cap is put on the container, the cap locking part does not protrude greatly to the outside, so that the cap can be supplied smoothly. Can do.

  Moreover, a notch part can also be provided in a part of the upper end inner peripheral surface side of the tamper evidence band. This makes it possible to reliably lock the tip of the cap locking portion between the inner peripheral surface of the cutout portion and the locking projection. That is, it is possible to appropriately select the thickness of the tip of the cap locking portion and absorb this by the depth of the cutout portion, thereby further ensuring the holding of the cap body.

  Further, a plurality of notches can be provided on the upper end side of the inner peripheral surface of the tamper evidence band. Accordingly, the cap locking portion of the cap body can be attached to the appropriately selected cutout portion, and the convenience of attaching and detaching the cap body can be further enhanced. In addition, if the marker which shows the position of the notch part which mounts a cap latching | locking part is clarified on a tamper evidence band by printing or engraving etc., convenience will increase further.

  And you may provide in the cap latching | locking part the thin part which thinned a part of tongue-like thickness. This makes it possible to easily bend and deform the tongue-like cap locking part, and after locking the cap body to the inner peripheral surface of the tamper-evidence band, tilting the cap body is an obstacle to drinking beverages. It can be held so as not to become.

  Furthermore, it is preferable to provide a recess at a position corresponding to the cap locking portion on the upper end side of the tamper evident band so as not to interfere with the cap locking portion protruding downward. In particular, as the shape of the concave portion, it is preferable to provide an inclined surface that is inclined downward from the downstream end portion in the opening direction of the concave portion toward the bottom portion of the concave portion. Thereby, it is possible to prevent the cap locking portion from interfering with the upper end side of the tamper evident band when opening.

Fig.1 (a) is a front view of the synthetic resin cap of a present Example, (b) is the longitudinal cross-sectional view. Fig.2 (a) is XX sectional drawing of the arrow XX of Fig.1 (a), (b) is the bottom view which looked at the cap from the bottom part side.
As shown in FIGS. 1 and 2, the synthetic resin cap 2 of this embodiment includes a circular top wall 4 and a cylindrical skirt wall (hereinafter sometimes referred to as a skirt wall) 6 that hangs down from the periphery of the top wall 4. A plurality of weakened portions 12 are provided at the lower end of the skirt wall 6 at intervals in the circumferential direction. The synthetic resin cap 2 includes a cap body 14 and a weakened portion above the weakened portion 12. It is divided into a tamper evidence band 16 below 12. An uneven shape 18 is formed on the outer peripheral surface of the skirt wall 6 of the cap body 14 to prevent finger slipping when opening or closing the cap.

  Two annular seal walls, that is, an inner annular seal wall 8 and an outer annular seal wall 10 are formed on the inner surface of the top wall 4, and a female thread 20 is formed on the inner peripheral surface of the skirt wall 6. The female thread 20 is cut out at a plurality of angular positions spaced in the circumferential direction, and a plurality of ventilation paths 22 extending in the axial direction are formed. A tongue-like cap locking portion 6A that protrudes downward from the lower end of the skirt wall 6 is formed at the lower portion of the skirt wall 6, and the left and right ends of the cap locking portion 6A from the lower end of the skirt wall 6. Narrow slits 6B and 6B extending upward are provided.

  In addition, a means for locking the tamper-vident band 16 after opening to the container mouth is provided on the inner peripheral surface of the tamper-vident band 16. That is, it is composed of a plurality of flap-like projecting pieces 26 that project from the inner peripheral surface of the tamper-evidence band 16 with an interval in the circumferential direction so as to incline upward in the radial direction.

When the description is continued with reference to FIG. 2 together with FIG. 1, the cap body 14 and the tamper evident band 16 of the synthetic resin cap 2 are joined via the plurality of weakening portions 12 before opening. After opening, the cap body 14 is separated from the container mouth and may be lost, so it is convenient to fix the cap body 14 to the container.
For this reason, the synthetic resin cap 2 of the present embodiment has the inner peripheral surface of the tamper-evident band 16 in which the cap locking portion 6A tip of the opened cap body 14 is left at the container mouth after the weakened portion is broken. And a locking projection 16D provided below the outer peripheral surface of the container mouth.

  A recess 16A is provided at the upper end of the tamper evidence band 16 at a position corresponding to the cap locking portion 6A on the upper end side of the tamper evidence band 16, and the recess 16A extends from the downstream end of the recess 16A in the opening direction. An inclined surface 16B is provided which is inclined downward toward the bottom of the plate. This prevents the cap locking portion 6A protruding downward from interfering with the upper end of the tamper evident band 16 when the cap is opened.

FIG. 3 is an enlarged view of a portion A for explaining a notch portion provided on the inner peripheral surface of the tamper evident band 16 of FIG. As shown in FIG. 3, a notch portion 16C is provided so as to cut out a part of the upper end of the inner peripheral surface 16N of the tamper evident band 16, so that the tip of the cap locking portion 6A is made to be notched 16C. It becomes possible to latch reliably between the inner peripheral surface of this and the latching protrusion 16D. Further, by appropriately selecting the thickness of the tip of the cap locking portion 6A, the tip of the cap locking portion 6A is absorbed in the depth direction of the cutout portion 16C, and the holding of the cap body 14 is further ensured. Can do.
Further, a plurality of notches 16C may be provided on the inner peripheral surface 16N of the tamper evident band 16, and the cap locking portion of the cap body may be attached to an appropriately selected notch.

  FIG. 4 is a front view showing a state after the cap of the embodiment is opened. As shown in the figure, when opening the cap, the cap body 14 of the synthetic resin cap 2 is gripped and rotated in the opening direction so that the weakened portion 12 is cut so as to be torn off, and the cap body 14 and the tamper evidence are removed. The band 16 is separated, and the tamper evident band 16 falls below the container mouth Y and remains.

  Fig.5 (a) is explanatory drawing which shows the state which removed the cap main body from the container opening part, (b) is explanatory drawing which shows the state which fixed the removed cap main body to the container opening part. As shown in the figure, the cap locking portion 6A of the removed cap body is inserted between the inner peripheral surface 16N of the tamper evident band 16 and the locking protrusion 16D provided below the outer peripheral surface of the container mouth Y. And fix.

  FIG. 6A is a longitudinal sectional view of FIG. 5B, and FIG. 6B is an enlarged view of part B thereof. As shown in the figure, by removing the cap body 14, the notch 16C formed on the inner peripheral surface of the tamper evident band 16 is exposed, and the tip of the cap locking portion 6A extending to the lower end of the skirt wall 6 is exposed. Is inserted and fixed between a locking projection 16D below the male thread formed on the outer peripheral surface of the container mouth Y and a notch 16C above the tamper-evidence band 16.

  Fig.7 (a) is an enlarged front view of the cap of the Example which formed the thin part in the cap latching | locking part, (b) is the longitudinal cross-sectional view. As shown in the figure, the cap of this embodiment can be easily bent and deformed by forming a thin portion 6C in which a part of the tongue-like thickness of the cap locking portion 6A is thinned. Can do. As a result, as shown in FIG. 8, after the cap body 14 is locked to the inner peripheral surface of the tamper evidence band 16, the cap body 14 can be tilted and held so as not to interfere with drinking.

  FIG. 9 is a front view of the cap of the embodiment in which markers are arranged at the positions of the notches. As shown to (a), the marker 16E by a printing display is arrange | positioned in the position of the notch part which inserts a cap latching | locking part on the upper surface of the tamper evident band 16. FIG. (B) shows a larger marker 16F display by deforming a part of the upper end of the tamper evident band 16 into a convex shape. By disposing these markers 16E and 16F on the tamper-evidence band 16, the operation of locking the removed cap body 14 after opening with the side surface of the container mouth Y can be performed smoothly and reliably. I am doing so. In FIG. 9, the cap locking portion is disposed on the back side.

  Since the synthetic resin cap of the present invention is provided with a tongue-like cap locking portion that can be locked between the inner peripheral surface of the tamper-evidence band and the locking projection, the tip thereof is tamper-evident. Can be securely inserted and fixed between the inner peripheral surface of the band and the locking projection provided at the container mouth, increasing the convenience of attaching and detaching the cap, and can be used industrially The nature is extremely large.

(A) is a front view of the synthetic resin cap of a present Example, (b) is the longitudinal cross-sectional view. (A) is XX sectional drawing of the arrow of FIG. 1 (a), (b) is the bottom view which looked at the cap from the bottom part side. It is the A section enlarged view explaining the notch part provided in the internal peripheral surface of the tamper evident band of Fig.2 (a). It is a front view which shows the state after opening of the cap of an Example. (A) is explanatory drawing which shows the state which removed the cap main body from the container opening part, (b) is explanatory drawing which shows the state which fixed the removed cap main body to the container opening part. (A) is the longitudinal cross-sectional view of FIG.5 (b), (b) is the B section enlarged view. (A) is an enlarged front view of the cap of the Example which formed the thin part in the cap latching | locking part, (b) is the longitudinal cross-sectional view. It is explanatory drawing which shows the state which inclined the cap main body after latching the cap main body to the internal peripheral surface of a tamper evident band. It is a front view of the cap of the Example which has arrange | positioned the marker in the position of a notch part.

Explanation of symbols

2 Synthetic resin cap 4 Top wall 6 Skirt wall 6A Cap locking part 6B Slit 6C Thin part 8 Inner annular seal wall 10 Outer annular seal wall 12 Weakened part 14 Cap body 16 Tamper evident band 16A Recessed part 16B Inclined face 16C Notch part 16D Locking protrusion 16E, 16F Marker 16N Inner peripheral surface 18 Concave and convex shape 20 Female thread 22 Ventilation path 26 Projection piece Y Container mouth

Claims (6)

A top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a tamper evidence band is provided at the lower end of the skirt wall through a plurality of weakened portions spaced apart in the circumferential direction. A synthetic resin that is formed and has a female thread formed on the inner peripheral surface of the skirt wall, and can be wound around a container mouth having a male thread on the outer peripheral surface and a locking protrusion below the male thread. In the cap made of
A tongue-like cap locking part protruding downward from the lower end of the skirt wall is formed at the lower part of the skirt wall, and after the cap is opened from the container mouth, the cap locking part is A synthetic resin cap formed so as to be able to be locked between an inner peripheral surface of a dent band and the locking protrusion. The synthetic resin cap according to claim 1, wherein a slit extending upward from a lower end of the skirt wall is provided in the skirt wall corresponding to the left and right ends of the cap locking portion. A cutout portion is provided in a part of the tamper evidence band on the inner peripheral surface side of the upper end, and the cap locking portion is formed so as to be locked between the inner peripheral surface of the cutout portion and the locking protrusion. The synthetic resin cap according to claim 1, wherein the cap is made of synthetic resin. The synthetic resin cap according to any one of claims 1 to 3, wherein a plurality of the cutout portions are provided on an upper end side of the inner peripheral surface of the tamper evidence band. The synthetic resin cap according to any one of claims 1 to 4, wherein the cap locking portion is provided with a thin portion in which a part of the wall thickness is reduced. A concave portion is provided at a position corresponding to the cap locking portion on the upper end side of the tamper evident band, and the inclined surface is inclined downward from the downstream end portion in the opening direction of the concave portion toward the bottom portion of the concave portion. The synthetic resin cap according to any one of claims 1 to 5, wherein the cap is provided.

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