JP2006240667A - Plastic cap having straw piercing port - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic cap having a straw piercing port for which a straw port is easily formed by the piercing of a straw, and the insertion of the straw into a container can easily be performed by breaking a seal foil from the straw port. <P>SOLUTION: This plastic cap is used for a beverage container on the mouth port of which the seal foil 51 is provided, and of which the sealability is ensured by the seal foil. The plastic cap has a ceiling wall 1, and a cylindrical side wall 3 which is lowered from the peripheral edge of the ceiling wall. On the internal surface of the lower end of the cylindrical side wall, a protuberance 5 for engaging with the container mouth section is formed. At the same time, the straw piercing port 10 made of a thinner wall through which the straw can be pierced is formed on the ceiling wall. At an internal surface corner section from the ceiling wall to the cylindrical side wall, a plurality of raising ribs 11 which come into contact with the upper end surface of the container mouth section are provided in the circumferential direction with a proper interval. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plastic cap with a straw piercing mouth, and more specifically, a straw piercing used for a beverage container in which a sealing foil is provided at the mouth and the sealing property is secured by the sealing foil. It relates to a plastic cap with a mouth.

  Beverage containers that are provided with a sealing foil such as an aluminum foil at the mouth and whose sealing performance is secured by the sealing foil are widely marketed, and some of these containers are sold with straws. Some are. That is, without drinking the sealing foil, a straw is directly inserted into the sealing foil to drink the beverage in the container.

By the way, in the case of using a cap in a beverage container with a straw as described above, since the straw must be inserted into the sealing foil at the container mouth after the cap is once opened, the operation is troublesome. There is a problem. Thus, a cap in which a straw port is formed in advance in the cap has been proposed (Patent Document 1). However, the formation of such a straw port has a problem that the sealing foil easily becomes dirty due to the intrusion of dust or the like, and hygiene is impaired.
Utility model registration No. 303503

  Therefore, it is conceivable to form a straw insertion port made of a thin wall into which the straw can be inserted in the cap. In this way, no opening is formed in the cap itself, and a straw port is formed by inserting a straw during use, so the problem of impairing the hygiene of the cap is avoided, and the insertion port Since the straw can be inserted into the container and the sealing foil provided at the container mouth part can be broken through to allow the straw to enter the container, the advantage that it can be drunk without opening the cap is also achieved.

  However, as a result of studies by the present inventors, when a straw insertion port is provided in the cap, the cap alone can easily insert the straw, but the container mouth portion provided with the sealing foil is provided. The attached cap has a problem that it is difficult to insert a straw. This tendency was particularly prominent when the cap was attached to a container in which the inside of the container was pressurized due to fermentation of the beverage or an increase in room temperature.

  Accordingly, an object of the present invention is to provide a straw insertion port in which a straw port can be easily formed by inserting a straw, and the sealing foil can be broken from the straw port and the straw can be easily inserted into the container. It is to provide a plastic cap.

  As a result of various investigations on the structure of the plastic cap with a straw insertion opening, the present inventors have found that the sealing foil is close to the straw insertion opening even when the straw insertion force of the cap and the sealing foil alone is small. However, when they are in close contact with each other, the fact that the cap wall and the sealing foil act synergistically to significantly increase the straw piercing force has been found, and the present invention has been completed.

According to the present invention, in the plastic cap used in the beverage container, the sealing foil is provided in the mouth, and the sealing performance is secured by the sealing foil.
An engagement protrusion that engages with the container mouth is formed on the inner surface of the lower end of the cylindrical side wall, having a ceiling wall and a cylindrical side wall that descends from the periphery of the ceiling wall.
The ceiling wall is formed with a straw insertion port made of a thin wall that can be inserted into a straw.
The inner surface corner portion from the ceiling wall to the cylindrical side wall is provided with a plurality of raised ribs that are in contact with the upper end surface of the container mouth portion at appropriate intervals in the circumferential direction. A plastic cap with a piercing opening is provided.

In the cap of the present invention,
(1) A circular thin wall line is formed on the ceiling wall so as to surround the straw insertion opening, spaced from the straw insertion opening, and the thin line is radially circular from the straw insertion opening. Extending to the thin line, and the circular thin line is formed with reinforcing bridges connecting the inside and outside of the line at appropriate intervals;
(2) On the inner surface of the ceiling wall, circumferential ribs are formed in the vicinity of the outer side of the circular thin line,
(3) At least a part of the raised rib extends to the circular thin wall line or the vicinity thereof,
Is preferred.

  In the present invention, it is an important feature that an inner surface corner portion from the ceiling wall to the cylindrical side wall is provided with a raised rib that contacts the upper end surface of the container mouth portion. That is, such a raised rib maintains an appropriate distance between the inner surface of the ceiling wall of the cap and the sealing foil provided at the container mouth. As a result, the stab by the synergistic action of the ceiling wall and the sealing foil It is possible to avoid an increase in the squeezing force, and to easily pierce the straw from the stab piercing opening formed in the cap ceiling wall and to break the sealing foil continuously into the straw into the container. It becomes possible. In such a cap, since the straw port is formed by inserting a straw, the opening for the straw port is not formed, so that dust does not enter the inside, and is extremely hygienic. .

  In the present invention, a circular thin wall line is provided so as to surround the straw insertion port, and a circular thin line is formed at a distance from the straw insertion port. It is preferable that the radial thin-wall line extends to the circular thin-wall line, and reinforcing bridges that connect the inside and the outside of the line are formed at appropriate intervals in the circular thin-wall line. That is, an area surrounded by such a circular thin line becomes a deformation or a partially broken area when the straw is inserted into the straw insertion opening. By forming such a deformation area, a broken piece is dropped inside. Without this, the straw can be inserted with a small insertion force.

  Furthermore, in the present invention, it is preferable that a circumferential rib is provided near the outside of the circular thin line, or at least a part of the raised rib is extended to the circular thin line or the vicinity thereof. By adopting such a structure, even when the sealing foil swells in a dome shape due to, for example, an increase in the internal pressure of the container, an appropriate interval can be maintained between the sealing foil and the straw insertion opening, The straw can be easily inserted.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a top view (a) and a bottom view (b) of a plastic cap of the present invention,
2 is a side sectional view of the cap of FIG.
FIG. 3 is an enlarged cross-sectional view of the vicinity of the straw insertion opening of the cap of FIG.
4 is an enlarged bottom view of the vicinity of the straw insertion opening of the cap of FIG.
FIG. 5 is a view showing a side cross section of the cap of FIG. 1 together with the container mouth portion.

  Referring to FIGS. 1 and 2, the plastic cap according to the present invention includes a ceiling wall 1 and a cylindrical side wall 3 depending from the peripheral edge of the ceiling wall 1.

  An engagement protrusion 5 is formed on the inner surface of the cylindrical side wall 3 at the lower end thereof, and this engagement protrusion 5 is engaged with the outer surface of the container mouth portion 50 shown in FIG. By combining, this cap is fixed to the container mouth part 50. As shown in FIG. 2, the engaging projections 5 are formed with notches 7 at appropriate intervals, thereby giving flexibility to the lower end portion of the cylindrical side wall 3. The cap can be easily fitted into the container mouth portion 50 and the cap can be removed from the container mouth portion 50.

  Further, a flange 9 is formed on the outer surface of the lower end portion of the cylindrical side wall 3, and the cap fitted into the container opening 50 can be removed by holding the flange 9 by hand.

  In the above-described cap, a substantially circular straw insertion port 10 is formed in the center portion of the ceiling wall 1 so as to be thin enough to allow a straw to be inserted. As is clear from the enlarged view of FIG. 3, the center portion of the cap where the straw insertion port 10 is formed is bent slightly downward to form a recess, so that the straw can be easily inserted into the central straw insertion port 10. It is like that.

  In the cap of the present invention, as shown particularly in FIGS. 1B and 2, a plurality of raised ribs 11 are provided in the circumferential direction at the inner corner portion from the ceiling wall 1 to the cylindrical side wall 3. They are provided at a predetermined interval. In other words, the straw rib 11 can be easily inserted into the straw.

  Please refer to FIG. 5 for explaining this function. In FIG. 5, a sealing foil 51 such as an aluminum foil is bonded and fixed to the upper end surface of the container mouth portion 50 by heat sealing or the like, and the sealing performance of the container mouth portion 50 is secured to the container mouth portion 50. Is secured.

  When a cap is attached to such a container mouth part 50, when the raising rib 11 is not provided, the sealing foil 50 is close to the inner surface of the ceiling wall 1 of the cap, and may be in close contact in some cases. As a result, the sealing foil 51 comes close to or in close contact with the inner surface side of the straw insertion port 10 described above. Therefore, when the straw is inserted, the thin wall of the insertion port 10 and the sealing foil 51 are simultaneously broken. Is required, and a large piercing force is required. That is, when a straw is inserted only into the insertion port 10 or when a straw is inserted only into the sealing foil 51, the straw can be easily inserted, but in the above case, it is difficult to insert the straw. It will end up.

  However, when the raised rib 11 is provided in accordance with the present invention, as shown in FIG. 5, the raised rib 11 abuts on the upper end surface of the container mouth portion 50, so that the sealing foil 51 and the cap ceiling wall are provided. When a straw is inserted only into the straw insertion port 10 or as a result of inserting a straw only into the sealing foil 51, the inner surface of 1, particularly the inner surface of the straw insertion port 10 is secured. In exactly the same manner, the straw can be easily inserted from the straw insertion port 10 to the inside of the container through the sealing foil 51, and the liquid in the container can be drunk.

  In the present invention, as shown in FIGS. 1 (b), 3 and 4, a circular thin line 15 is formed around the straw insertion port 10, and the radial line is formed from the insertion port 10. The thin line 17 is formed up to the circular thin line 15, and the reinforcing line 19 is provided in the circular thin line 15 so as to connect the inner and outer thick portions. That is, in the case of the structure as described above, the region surrounded by the circular thin line 15 becomes a deformation or fracture region at the time of straw insertion. For example, at least a part of the radial thin line 17 is broken, The enclosed thick part 21 hangs downward with the circular thin line 15 connected by the bridge 19 as a fulcrum. That is, since the radial thin line 17 is broken simultaneously with the insertion of the straw into the straw insertion port 10, the insertion force of the straw is reduced and the insertion of the straw is facilitated. Further, at this time, since the drooped thick portion 21 is firmly held by the bridge 19 even if a part of the circular thin wall 15 is broken, there is a disadvantage that they fall into the container. Effectively prevented.

  The bridges 19 are preferably distributed evenly over substantially the entire circumference of the circular thin line 15. That is, when the straw is pierced, the progress of breakage from any radial thin line 17 to the circular thin line 15 can be prevented.

  Further, the straw insertion port 10 is preferably formed at the center of the circular thin line 15 so that the straw insertion port 10 and the radial thin line can be smoothly broken when the straw is inserted. is there.

  Further, in the present invention, as shown in FIG. 1B and the like, it is preferable to provide a circumferential rib 23 in the vicinity of the outside of the circular thin line 15. That is, when the beverage is fermented or the inside of the container is in a pressurized state due to an increase in room temperature or the like, the sealing foil 51 shown in FIG. Therefore, in such a case, the sealing foil 51 may be close to or in close contact with the inner surface of the straw insertion port 10. However, by providing the circumferential rib 23 as described above, an appropriate interval can be secured between the swelled sealing foil 51 and the insertion port 10, and the straw can be easily inserted. Can do it.

  In the example of FIG. 1B, the circumferential rib 23 is formed in a circular shape so as to surround the entire circumference of the circular thin line 15, but is different from the swelled sealing foil 51. The circumferential rib 23 can also be formed by arranging the arc-shaped ribs in a circular shape as a whole at an appropriate interval as long as close contact with or close to the inlet 10 can be prevented.

  In the present invention, instead of providing the circumferential rib 23 as described above, at least a part of the above-described raised rib 11 is extended to the above-described circular thin wall line 15 (or the vicinity of the line 15). The raised rib 11 can also prevent adhesion and proximity between the swollen sealing foil 51 and the insertion port 10.

  In the above-described example, the straw insertion port 10 is formed in the central portion of the ceiling wall 1 of the cap, but is not limited to such a position, and the insertion port 10 is provided at an eccentric position. Of course, it is also possible to provide them.

  The cap of the present invention described above is injected using various plastics such as low-, medium- or high-density polyethylene, linear low-density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrenic resin, ABS resin and the like. It is easily manufactured by integral molding such as molding.

It is the top view (a) and bottom view (b) of the plastic cap of this invention. It is a sectional side view of the cap of FIG. It is sectional drawing which expands and shows the straw insertion opening vicinity part of the cap of FIG. It is a bottom view which expands and shows the straw insertion opening | mouth vicinity part of the cap of FIG. It is a figure which shows the side cross section of the cap of FIG. 1 with a container opening part.

Explanation of symbols

10: Straw insertion port 11: Raised rib 15: Circular thin line 17: Radial thin line 19: Reinforcing bridge 23: Circumferential rib 51: Seal foil

Claims (4)

In a plastic cap used for a beverage container provided with a sealing foil at the mouth, and sealing performance is secured by the sealing foil,
An engagement projection that engages with the container mouth portion is formed on the inner surface of the lower end of the cylindrical side wall, having a ceiling wall and a cylindrical side wall that descends from the periphery of the ceiling wall.
The ceiling wall is formed with a straw insertion port made of a thin wall that can be inserted into a straw.
The inner surface corner portion from the ceiling wall to the cylindrical side wall is provided with a plurality of raised ribs that are in contact with the upper end surface of the container mouth portion at appropriate intervals in the circumferential direction. Plastic cap with piercing opening.   A circular thin wall line is formed on the ceiling wall so as to surround the straw insertion opening, spaced from the straw insertion opening, and a radial thin line extends from the straw insertion opening to the circular thin line. The plastic cap with a straw insertion opening according to claim 1, wherein the thin circular line is formed with reinforcing bridges connecting the inner and outer sides of the circular thin line at appropriate intervals.   The plastic cap with a straw insertion opening according to claim 2, wherein a circumferential rib is formed on the inner surface of the ceiling wall in the vicinity of the outer side of the circular thin line. The plastic cap with a straw insertion opening according to claim 2, wherein at least a part of the raising rib extends to the circular thin wall line or the vicinity thereof.

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