JP2019026316A - Cap and bottle with cap - Google Patents

Abstract

To make it possible to prevent contamination of a foreign matter from a vent hole while keeping an appearance of a cap, and to reliably hook a liner thereby preventing falling-out of the liner from a cap body.SOLUTION: A cap comprising: a cap body 1 in which a discoidal top plate part 2 with a cap center line O as a center, and a peripheral wall part 3, which cylindrically extends around the cap center line O from an outer periphery of the top plate part 2, are integrally formed; and a discoidal liner 4 which is provided on an inner face 2a of the top plate part 2 of the cap body 1. A liner hook part 11, which projects to a radial direction inner peripheral side of the cap center line O with respect to an outer peripheral edge of the liner 4 without penetrating the peripheral wall part 3 and hooks the liner 4, is formed on a part of the peripheral wall part 3 of the cap body 1 closer to the top plate part 2, and a vent hole 12, which penetrates the peripheral wall part 3, is formed on a part of the peripheral wall part 3 in which the liner hook part 11 is not formed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cap attached to a mouth portion of a bottle such as a bottle can, and a bottle with a cap to which this cap is attached.

  As such a cap and a bottle with a cap, for example, in Patent Document 1, a cap body including a top surface portion and a cylindrical portion substantially suspended from the periphery of the top surface portion, a liner provided on the inner surface of the top surface portion, and A cap with a liner that tightly plugs the cap portion of the container, and when the inner pressure of the container is set to 600 kPa by re-sealing the cap with the liner into the container, the cap with the liner is moved from the closed position in the circumferential direction. A cap with a liner whose internal pressure drops to 150 kPa or less when the container is opened by rotating 180 °, and a container with a cap tightly sealed by winding such a cap with a liner around the base of the container. When the container is re-sealed with the liner cap and the internal pressure of the container is 600 kPa, the liner cap is opened from the closed position to the opening direction. Maximum torque generated by 180 ° by unplugging to unplugging and have been described and capped containers are less 80 N · cm.

Here, in the vicinity of the top surface of the cylindrical portion of the cap, there are provided a plurality of vent holes that are formed in a slit shape in the circumferential direction to release the internal pressure when the cap is opened, and these vent holes are the largest opening. The opening area of each of the vent holes at the position to be observed is 0.35 mm ² or more and 0.8 mm ² or less, and the total area of the opening areas of each vent hole is 5.0 mm ² or more and 11.5 mm ^2. It is as follows.

JP-A-2006-155602

  By the way, in the cap described in Patent Document 1, the upper opening end portion and the lower opening end portion of the vent hole in the cylindrical portion of the cap body are formed by bending inward in the radial direction of the cylindrical portion. An upper protrusion and a lower protrusion are provided, and the tip of the upper protrusion is located radially inward from the outer peripheral edge of the liner, and is the same position or radial direction as the tip of the lower protrusion. Located outside. In such a cap, the liner is inserted from the opening end of the cap body, so that the outer peripheral edge thereof is elastically deformed and is assembled over the lower protrusion and the upper protrusion, and is locked to the upper protrusion. And is held between the inner surface of the top surface portion.

  Therefore, in order to securely lock the liner to the cap body, the upper protrusion formed by the upper opening end of the vent hole must be bent largely inward in the radial direction. However, in such a cap, since each vent hole is also greatly opened, the appearance of the cap is deteriorated, and foreign matter is mixed from the vent hole into the cap body as described in Patent Document 1. There is a possibility that it becomes easy to do.

  The present invention has been made under such a background, and while keeping the appearance of the cap and preventing foreign matter from entering from the vent hole, the liner is securely locked to prevent the cap body from coming off the cap body. It is an object to provide a cap and a bottle with a cap that can be used.

  In order to solve the above problems and achieve such an object, the cap of the present invention includes a disc-shaped top plate centered on the cap center line, and the cap center line from the outer periphery of the top plate part. A cap body integrally formed with a peripheral wall portion extending in a cylindrical shape around the center, and a disc-shaped liner disposed on the inner surface of the top plate portion of the cap body, The portion of the peripheral wall portion of the cap body near the top plate portion protrudes radially inward from the outer peripheral edge of the liner with respect to the cap center line without penetrating the peripheral wall portion, and locks the liner. And a vent hole penetrating through the peripheral wall portion is formed in a portion of the peripheral wall portion where the liner locking portion is not formed.

  The bottle with a cap according to the present invention is characterized in that such a cap is attached to a cap attaching portion of the bottle body.

  In the cap and the bottle with the cap configured as described above, a peripheral wall portion such as a vent hole is formed in the liner locking portion that protrudes radially inward with respect to the cap center line from the outer peripheral edge of the liner and locks the liner. A through hole is not formed, and a vent hole that penetrates the peripheral wall portion and releases the internal pressure when the plug is opened is formed in a portion where the liner locking portion is not formed. For this reason, it is not necessary to open the vent hole greatly while the liner is securely locked by the liner locking portion, and in the bottle with a cap, the cap mounting portion can be seen from the vent hole, or the appearance is deteriorated, or the foreign matter from the vent hole Can be prevented from being easily mixed.

  Here, by forming the liner locking portion around the cap center line over the entire circumference of the peripheral wall portion, the outer peripheral edge of the liner is also locked by the liner locking portion over the entire circumference. Therefore, it is possible to prevent the liner from coming off more reliably. And in such a case, what is necessary is just to form the said vent hole in the opposite side to the said top-plate part rather than the said liner latching | locking part.

  As described above, according to the present invention, it is not necessary to greatly open the vent hole, and it is possible to prevent the appearance from being deteriorated and foreign matter from being mixed, and the liner can be securely locked and removed from the cap body. Detachment can be prevented.

It is a perspective view which shows one Embodiment of the cap of this invention. It is a partially broken side view of embodiment shown in FIG. It is an expanded sectional view of the X section in FIG.

  1 to 3 show an embodiment of the cap of the present invention. The cap of the present embodiment is a cap for a threaded bottle can having a cap mounting portion in which a male screw portion is formed, and is formed of a metal material such as aluminum or aluminum alloy and has a cap center line O as a center. A bottomed cylindrical cap body 1 is provided. That is, in the cap body 1, the cap center line 2 is formed from the outer periphery of the disk-shaped top plate portion 2 toward the lower end side of the cap body 1 (lower side in FIGS. 2 and 3). A peripheral wall portion 3 extending in a cylindrical shape centering on O is integrally formed.

  Further, a resin-made disk-shaped liner 4 is disposed on the inner surface (lower surface) 2 a of the top plate portion 2. The liner 4 is made of a hard resin mainly made of polyethylene or polypropylene, and has a large-diameter sliding layer 4a that is disposed in a non-adhering state with the inner surface 2a on the top plate portion 2 side, and the top plate portion of the sliding layer 4a. 2 has a multilayer structure including a sealing layer 4b made of a softer resin and having a smaller diameter than the sliding layer 4a made of an elastomer resin disposed directly or via an intermediate layer such as a barrier layer. The sliding layer 4a is formed into a flat plate having a substantially uniform thickness, while the sealing layer 4b is thick at the outer peripheral edge and thin at the inner peripheral part on the top plate part 2 side. The step portion between the outer peripheral edge and the outer peripheral edge has a tapered surface shape toward the top plate 2 as it goes toward the inner periphery.

  Further, the peripheral wall 3 of the cap body 1 is connected to a knurl 5 swelled radially outward with respect to the cap center line O toward the lower end on the upper end near the top plate 2 and the lower end of the knurl 5. A groove 6 recessed inwardly is formed so as to circulate around the peripheral wall 3 around the cap center line O. Furthermore, on the lower end portion side of the peripheral wall portion 3 on the side opposite to the top plate portion 2, a bead 7 that swells toward the outer periphery side in order from the upper end portion side to the lower end portion side, and an outer diameter larger than that of the bead 7. A small-diameter easily breakable portion 8 and a cylindrical flare (open end portion) 9 having an outer diameter larger than that of the easily breakable portion 8 and extending to the lower end of the cap body 1 are formed.

  In the easily breakable portion 8, a plurality of slit portions 8a extending in the circumferential direction in a side view and recessed inward in the radial direction with respect to the cap center line O are formed at equal intervals in the circumferential direction, and these slit portions 8a The portion between is a bridge portion 8b. In the slit portion 8a, a slit 8c penetrating the peripheral wall portion 3 is formed on the long side on the upper end side of the slit portion 8a. Further, when the bottle can is capped to the cap mounting portion, the flare 9 is wound around the lower end portion of the bulging portion formed on the lower end side of the male screw portion of the cap mounting portion.

  Further, the portion between the groove 6 on the upper end side and the bead 7 on the lower end side of the peripheral wall portion 3 is screwed into the male screw portion of the cap attachment portion when capping the bottle can onto the cap attachment portion. The female screw formation scheduled portion 10 is formed with a female screw portion. The external diameter of the female screw formation scheduled portion 10 is set to a substantially constant outer diameter that is larger than the outer diameter of the groove 6 and smaller than the outer diameter of the bead 7.

  On the other hand, the knurl 5 is formed so that the peripheral wall 3 of the cap body 1 is recessed toward the inner peripheral side at a portion of the knurl 5 near the top plate 2 and is radially inward with respect to the cap centerline O. A liner locking portion 11 that protrudes to the peripheral side but does not penetrate the peripheral wall portion 3 is formed. The radius of the cylindrical surface centering on the cap centerline O inscribed in the liner locking portion 11 is made smaller than the radius of the outer peripheral edge of the liner 4 (the outer peripheral edge of the sliding layer 4a), and the sealing layer 4b The radius of the outer peripheral edge is larger than that of the outer peripheral edge, and the liner locking portion 11 holds the liner 4 with the outer peripheral edge of the sliding layer 4a being locked. The

  Here, in the present embodiment, the liner locking portion 11 has a radius in a cross section along the cap center line O, as shown in FIGS. 2 and 3, from the upper end side to the lower end side of the peripheral wall portion 3. After being recessed toward the inner periphery in the direction, it is formed so as to draw a convex curve toward the outer periphery in the radial direction, and is formed around the entire circumference of the peripheral wall portion 3 around the cap center line O. The knurl 5 in the cap of this embodiment is formed so as to swell radially outward in two steps. The radius of the cylindrical surface centered on the cap center line O inscribed in the liner locking portion 11 is slightly smaller than the radius of the cylindrical surface in the center of the cap center line O inscribed in the groove 6.

  In addition, in the knurl 5 that swells in two steps in this manner, the width in the direction of the cap center line O in the step on the lower end side of the peripheral wall 3 is made larger than the width in the direction of the cap center line O in the step on the upper end side. ing. Then, the peripheral wall portion 3 is arranged in the radial direction with respect to the cap center line O in a portion where the liner locking portion 11 on the lower end side on the side opposite to the top plate portion 2 of the wide knurl 5 is not formed. A vent hole 12 penetrating therethrough is formed.

  Here, the vent hole 12 in the present embodiment is formed by cutting out the step on the lower end side of the knurl 5 into a “U” shape opened to the lower end side when viewed from the outer peripheral side, and bending it to the inner peripheral side. The protrusion 12a is formed to penetrate the peripheral wall 3, and a plurality of such vent holes 12 are formed at equal intervals in the circumferential direction. The radius of the cylindrical surface centering on the cap centerline O inscribed in the lower protrusion 12a bent inward in this way is centered on the cap centerline O inscribed in the liner locking portion 11. It is slightly larger than the radius of the cylindrical surface.

  In order to manufacture such a cap body 1 for a bottle can cap, first, a rolled plate material having a predetermined original plate thickness made of a metal material such as aluminum or an aluminum alloy is punched into a disk-shaped blank material, and this blank material is used. The outer periphery of the die is disposed on the upper surface of the die having a circular hole and is sandwiched and supported between the circular hole and a presser having a coaxial circular hole. A bottomed cylindrical cap shell is formed by squeezing by inserting a punch.

  At this time, the thickness of the top plate portion of the cap shell that becomes the top plate portion 2 of the cap body 1 is substantially equal to the original plate thickness of the rolled plate material. Further, when the cap shell is molded, the open end portion of the cap shell is trimmed at the same time so as to align the height in the direction of the cap center line O. Thereafter, the knur 5 provided with the liner locking portion 11, the vent hole 12 and the lower projection 12a on the peripheral wall portion of the cap shell, and the easily breakable portion 8 provided with the groove 6, the bead 7 and the slit portion 8a, The cap body 1 as described above is manufactured by forming the flare 9 and the female screw formation scheduled portion 10.

  Further, in order to dispose the liner 4 on the inner surface 2a of the top plate portion 2 of the cap body 1, for example, the liner 4 that has been previously formed into a multilayer structure and cut into a disk shape is elastically deformed. However, it is inserted between the inner surface 2 a of the top plate portion 2 in the cap body 1 through the liner locking portion 11. Alternatively, as described in, for example, Japanese Patent Application Laid-Open No. 2011-240937, the top plate in the cap body 1 passes through the liner locking portion 11 while elastically deforming the sliding layer 4a of the liner 4 cut into a disc shape. After being inserted into the inner surface 2a side of the part 2, a mold mold is inserted into the cap body 1, and the sealing layer 4b is molded with this mold. Alternatively, for example, as described in JP-A-2015-003325, the sliding layer 4a and the sealing layer 4b of the liner 4 may be molded in this order using molds for molding. .

  Furthermore, in order to produce a bottle with a cap according to an embodiment of the present invention by capping the cap body 1 with the liner 4 disposed in this manner on a bottle body such as a bottle can, the contents such as a beverage are filled. The cap main body 1 is put on the cap mounting portion of the bottle main body, and the top peripheral portion of the top plate portion 2 is pressed against the opening edge of the cap mounting portion by the pusher block of the capping device, thereby drawing the liner 4. The outer peripheral edge part thickened among the sealing layers 4b is pressure-bonded to the opening edge.

  In this state, the flaring 9 of the cap body 1 is wound around the lower end of the bulging portion of the cap mounting portion by the skirt winding roller of the capping device, and the bottle body has a male screw portion at the cap mounting portion. In the case of a bottled can with a screw, etc., by moving the thread cutting roller in a spiral manner along the thread valley portion of the male screw portion, the female screw forming portion 10 of the cap body 1 is provided with a female screw. Mold the part. Thereby, the cap main body 1 is screwed to the cap attaching portion, and the inside of the bottle main body is sealed, and the bottle with a cap according to the embodiment of the present invention is manufactured.

  In the cap with the above-described configuration and the bottle with the cap attached to the cap mounting portion of the bottle body as described above, the liner 4 protrudes from the outer peripheral edge of the liner 4 to the inner peripheral side in the radial direction with respect to the cap center line O. The liner locking portion 11 to be locked is not formed with a portion penetrating the peripheral wall portion 3 of the cap main body 1 like the vent hole 12, so that the liner locking portion 11 has an inner portion to securely lock the liner. Even if the radius of the cylindrical surface with the cap center line O in contact is reduced, the portion penetrating the peripheral wall portion 3 does not increase in this way.

  And the vent hole 12 which penetrates the surrounding wall part 3 and open | releases an internal pressure at the time of plugging is formed in the part in which this liner latching | locking part 11 is not formed. For this reason, the liner 4 is securely locked by the liner locking portion 11 to prevent the liner 4 from coming off, and the vent hole 12 can be made small within a range necessary to release the internal pressure, and the vent hole 12 having a large opening. From this, it is possible to prevent the cap attaching part of the bottle with a cap from being seen and the appearance from being deteriorated, or foreign matters from being easily mixed between the cap main body 1 and the cap attaching part from the vent hole 12.

  Further, in the present embodiment, the liner locking portion 11 is formed over the entire circumference of the peripheral wall portion 3 around the cap center line O, and therefore the outer peripheral edge of the liner 4 is also locked over the entire circumference. Since it is latched by the part 11, it becomes possible to prevent the liner 4 from coming off more reliably. Further, when the liner locking portion 11 is formed over the entire circumference of the peripheral wall portion 3 in this way, in this embodiment, the vent hole 12 is formed on the side opposite to the top plate portion 2 with respect to the liner locking portion 11. Therefore, even if the radius of the cylindrical surface centering on the cap center line O inscribed in the liner locking portion 11 is reduced, it is possible to avoid the vent hole 12 from opening greatly.

  However, in this embodiment, the liner locking portion 11 is formed over the entire circumference of the peripheral wall portion 3 so that the knurl 5 swells in two steps on the upper end portion side and the lower end portion side. The knurl 5 which is swollen in one step like the cap described in FIG. 1 is left, and the knurl 5 is arranged on the inner peripheral side in the radial direction with respect to the cap center line O from the outer peripheral edge of the liner 4 without penetrating the peripheral wall portion 3. A plurality of protruding liner locking portions 11 may be formed at intervals so as to be scattered in the circumferential direction to lock the liner 4. In such a case, the vent hole 12 may be formed on the lower end side of the peripheral wall portion 3 with respect to the liner locking portion 11 as in the above embodiment, and the liner locking portion 11 in the cap centerline O direction. So as to overlap with the liner locking portion in the circumferential direction.

  Further, in the present embodiment, the lower protrusion 12a is formed by cutting out the knurled shape of the knurl 5 from the outer peripheral side into a “U” shape that opens to the lower end side, and is bent toward the inner peripheral side. The nail 5 has a teardrop shape, or a circular or elliptical shape when viewed from the outer peripheral side, and a concave portion recessed on the inner peripheral side of the cap body 1 is formed. A vent hole 12 extending in a slit shape in the direction and penetrating the peripheral wall 3 is formed, and the vent hole 12 is opened by bending the upper opening and the lower opening of the vent hole 12 radially inward. It may be. Note that the vent hole 12 may be a hole having a simple cross-sectional shape.

  Further, in the present embodiment, the vent holes 12 are formed in the knurl 5 at equal intervals in the circumferential direction. However, a non-formed region where the vent hole 12 is not formed is provided in the knurl 5, and the vent hole is formed in the non-formed region. Form weakening slits and weakening scores that are longer than 12 in the circumferential direction, and further provide an opening base point that is further weakened than the surroundings by being thinned by slits or slit processed in these weakening slits or weakening scores May be. By providing such a weakening slit and weakening score, even if the internal pressure rises due to the contents in the bottle decaying or fermenting after opening the cap once and closing, the weakening slit or weakening score The cap body 1 can be provided with an explosion-proof function of releasing internal gas by being spread.

DESCRIPTION OF SYMBOLS 1 Cap main body 2 Top plate part 2a Inner surface of the top plate part 2 3 Peripheral wall part 4 Liner 4a Sliding layer 4b Sealing layer 5 Knurl 6 Groove 7 Bead 8 Easily breakable part 9 Flare 10 Female thread formation scheduled part 11 Liner latching part 12 Bent hole 12a Lower projection O Cap center line

Claims (3)

A cap body integrally formed with a disc-shaped top plate portion centering on the cap center line and a peripheral wall portion extending in a cylindrical shape around the cap center line from the outer periphery of the top plate portion;
A cap provided with a disc-shaped liner disposed on the inner surface of the top plate portion of the cap body,
The portion of the cap body near the top plate in the peripheral wall portion projects from the outer peripheral edge of the liner toward the inner peripheral side in the radial direction with respect to the cap center line without penetrating the peripheral wall portion. A liner locking part is formed to stop,
A cap in which a vent hole penetrating the peripheral wall portion is formed in a portion of the peripheral wall portion where the liner locking portion is not formed.   The liner locking portion is formed over the entire circumference of the peripheral wall portion around the cap center line, and the vent hole is on the opposite side of the top plate portion from the liner locking portion. The cap according to claim 1, wherein the cap is formed.   A bottle with a cap, wherein the cap according to claim 1 or 2 is attached to a cap attaching portion of a bottle body.

Images