JP5613489B2 - Plastic cap - Google Patents

Description

  The present invention relates to a synthetic resin cap that is plugged into a container mouth, and specifically relates to a cap provided with a groove portion that facilitates removal at the time of separation and collection in a cap body.

  Conventionally, caps that can be easily separated and collected from the viewpoint of environmental problems and recycling have been demanded. In order to facilitate separate collection of caps, in the cap with thickened shoulders from the fitting upper wall to the outer peripheral wall, two grooves, a deep groove and an extended groove, which are continuous in the circumferential direction and break at the time of separate collection Is formed on the outer peripheral wall of the cap, and there is a hinge cap provided with a main shaft weakening line for breaking both groove portions at the corner portion on the opposite side of the extended groove of the deep groove (see, for example, Patent Document 1) about).

  Further, the cylindrical side wall is connected to the inner side wall part and the outer side wall partly by a slit extending downward from the upper end of the thickness part of the cylindrical side wall, and the tear region that can be torn during the separate collection extends deeply downward. There is a slit that is a non-tearable fixed region that extends shallowly downward, or a cap in which the slit is not formed and the inner wall portion and the outer wall portion are integrated (see, for example, Patent Document 2) about).

JP 2001-192053 A JP 2007-022567 A

  As described above, since the cap having the groove on the top surface of the cylindrical side wall of the cap body has a weakened portion that can be torn in the circumferential direction in the groove, it is possible to tear the weakened portion at the time of separation and collection. The fitting force can be easily weakened.

  However, in such a cap, there are a range including a groove portion and a range not including a groove portion on the entire circumference of the cap, so that the diameter of the cap is not uniformly expanded when the stopper is mounted, and the cap is distorted. May occur. Further, the holding force to the container mouth after the stopper is likely to vary.

  In addition, the cap having a cylindrical side wall made of an inner / outer double wall structure with a slit extending from the upper end to the lower end of the thickness portion of the cylindrical side wall has slits formed on the entire circumference of the cap body. However, such a cap tears the tear area during separation and collection, and when removing the fixed area remaining in the container, pulling the torn outer peripheral wall together with the knob, the outer peripheral wall is pulled from the lower end. It may break and may be separated from the cap body, which may hinder separation and collection.

  Therefore, the present invention aims to provide a cap that does not cause such a problem and can be easily separated and collected.

The present invention relates to a synthetic resin cap comprising a cap body that is plugged into a container mouth portion and an upper lid that is attached to the cap body. The cap body includes a top wall and a cylindrical side wall. cage, cylindrical side wall has a groove on the top surface of that which has a mating projection on the inner peripheral surface thereof, the groove portion includes a breaking groove having a circumferential line of weakening therein,該破cross groove fitting protrusion and Ri do from unbroken groove portion that is provided so as to face each other with a portion where the groove portion is not formed in the cylindrical side wall, 該破Dan groove, the bottom with respect to the axial direction It is a synthetic resin cap characterized by being formed so as to be higher and lower than the lower surface of the top wall .

  Further, the present invention is the synthetic resin cap capable of being separated and collected, characterized in that the breaking groove portion and the non-breaking groove portion are provided close to each other.

  Further, the present invention is a synthetic resin cap capable of being separated and collected, wherein the breaking groove portion and the non-breaking groove portion are provided with the same depth.

  Further, the present invention is the synthetic resin cap characterized in that the circumferentially weakened portion is continuous with the axially weakened portion provided on the cylindrical side wall.

  The cap of the present invention includes a fractured groove and a non-breakable groove formed so as to face the fractured groove on the top surface of the cylindrical side wall of the cap body. The diameter expansion can be well balanced, and the holding force to the container mouth can be stabilized.

  In addition, the fractured groove part and the non-breakable groove part are provided so as to face each other, that is, formed through a cylindrical side wall in which no groove part is formed. A tensile force can be stably applied to the thick portion of the material, and there is no problem that the torn side wall is broken from the lower end and separated from the cap body.

  In addition, by providing the breaking groove portion and the non-breaking groove portion close to each other, the groove portion can be formed over a wide range of the entire circumference of the cap, and the holding force to the container mouth portion is more stable. can do.

  Further, since the breaking groove portion and the non-breaking groove portion are provided with the same depth, the balance of the facing groove portions can be easily maintained.

It is sectional drawing in the II line | wire of FIG. It is a top view of the cap of the present invention. It is sectional drawing at the time of lid closing in the III-III line of FIG.

  An embodiment of the present invention will be described with reference to FIGS. The cap 1 is made of a synthetic resin and is used by being plugged into a container (not shown). The cap 1 includes a cap body 2 and an upper lid 3 that is attached to the cap body 2. In the present embodiment, the cap body 2 and the upper lid 3 are coupled by a hinge 4.

  The cap body 2 includes a pour tube 5 having a radial tip and a tube portion 7 connected to the pour tube 5 via a top wall 6. The inner top wall 6 of the dispensing cylinder 5 is provided with a blocking wall 8 that blocks the flow of fluid. The blocking wall 8 is provided with an endless fissure 9 and a pull ring 10. The pull ring 10 is disposed inside the fissure 9. In the present embodiment, the blocking wall 8 is provided in a substantially triangular shape, but other shapes such as a circle, an ellipse, and a polygon can be selected as appropriate.

  The top wall 6 is provided with a locking cylinder 11 concentric with the dispensing cylinder 5. The locking cylinder 11 has a larger diameter than the dispensing cylinder 5.

  The upper lid 3 includes a top wall 12 and a skirt portion 13 continuous with the top wall 12, and a flange portion 14 is provided at a lower end portion opposite to the hinge portion 4. On the inner surface of the top wall 12, an outer ring 15 formed so as to press-contact the outer periphery of the tip of the pouring cylinder when the lid is closed, and an inner ring 16 disposed inside the outer ring 15 that press-contacts the inner circumference of the pouring cylinder are concentric. Standing up.

  A groove 18 is formed in the height direction on the top surface 17a of the cylindrical side wall 17 which is the outer periphery of the cap body 2, and the cap 1 is provided on the inner peripheral surface 17c of the container mouth of a container (not shown). When the stopper is mounted, it has a fitting protrusion 17d for fitting the container mouth part and the cap body 2 together.

  As shown in FIG. 2, the groove 18 is provided so as to surround the outer periphery of the locking cylinder 11 in a plan view. Further, the groove portion 18 is constituted by a fracture groove portion 18A and a non-breakage groove portion 18B, and both the groove portions 18A and 18B are provided through a cylindrical side wall 17 in which no groove portion is formed. In the present embodiment, the groove portion 18 is formed in a concave shape. It is provided via the finger hooking portion 17b and an axial weakening portion 19 described later.

  Considering the ease of separation and collection and the range in which the non-breaking groove portion 18B described later is formed, the breaking groove portion 18A has a cylindrical side wall 17 whose center angle θ is 90 ° ≦ θ ≦ 270 °. Formed in the range. Further, the bottom portion 18 a is provided with a circumferential weakening line 18 b over the entire portion, and is continuous with the axial weakening portion 19. In this embodiment, θ = about 194 °. The fracture groove 18A is formed such that the position of the bottom 18a is higher than the fitting protrusion 17d in the axial direction and lower than the lower surface 6a of the top wall 6.

  The axial direction weakening part 19 has a weakening line continuous to the circumferential direction weakening line 18b, and is formed by cutting the cylindrical side wall 17 in a manner that leaves one end on the bottom side of the cylindrical side wall 17 from the top surface 17a. And is provided in the vicinity of the hinge 4. Specifically, the hinge 4 is provided so as to be continuous with the end 4a on the non-breaking groove 18B side.

  The non-breaking groove portion 18B is a groove that does not have the circumferential weakening line 18b unlike the breaking groove portion 18A, and is formed to face the breaking groove portion 18A. The non-breaking groove portion 18B is formed in a range where the breaking groove portion 18A of the cylindrical side wall 17 is not formed. In plan view, the breaking groove portion 18A and the non-breaking groove portion 18B formed in an arc shape face each other inward of the cap. It is formed. The central angle of the range of the cylindrical side wall 17 where the non-breaking groove 18B is formed may not be the same as that of the breaking groove 18A. Moreover, it can also be set as the groove part 18 which considered that the center part of the fracture | rupture groove part 18A formed in an arc shape and the non-breaking groove part 18B is spaced apart at a substantially 180 degree interval, and the right and left balance is taken into consideration.

  In the present embodiment, the non-breaking groove portion 18B has a space cross-section having the same shape as the cross-section of the breaking groove portion 18A, and its bottom portion 18a is located at the same depth as the bottom portion 18a of the breaking groove portion 18A in the axial direction. It is formed to do.

  An intermediate leg 20 is provided between the inner ring 16 and the skirt portion 13 of the upper lid 3. In the present embodiment, the middle leg 20 is suspended from the outer ring 15, and the middle leg 20 is provided between the dispensing cylinder 5 and the locking cylinder 11 when the upper lid 3 is closed. It is provided so as to be substantially in contact with the contact surface 6 b of the top wall 6.

  The middle leg 20 only needs to be able to support the upper lid 3 when the cap 1 is plugged. When the lid is closed, the middle leg 20 does not substantially contact the contact surface 6b, but contacts the contact surface 6b only when plugging. It can also be provided. Furthermore, it is desirable that the middle leg 20 is provided over the entire circumference, and it is possible to enhance the sealing performance by forming the middle leg 20 so as to contact the locking cylinder 11 when the lid is closed.

  The process at the time of separate collection of the cap 1 will be described. When the cap 1 is separated by tearing the axial direction weakening portion 19 and the circumferential direction weakening line 18b, a portion (a picking portion) that the user picks with a finger is required. In this embodiment, the upper lid 3 serves as its role. Is responsible. It should be noted that other parts such as the hinge 4 can be used as appropriate in the knob, or can be newly provided.

  (1) With the cap 1 being opened, the user picks the upper lid 3 and pulls it in a certain direction of the container, whereby the axially weakened portion 19 is torn. Further, when the user pulls in the same direction, one end on the bottom side of the cylindrical side wall 17 in the cap body 2 continuous with the axially weakened portion 19 is torn.

  (2) At the same time as or after the step (1), a part of the circumferential weakening line 18b on the bottom surface of the fracture groove 18A is also torn.

  (3) Next, when the user grasps and pulls the upper lid 3 in a substantially horizontal direction with respect to the container, the circumferential weakening line 18 b is torn along the circumferential direction of the cap body 2.

  (4) By this step, the cap body 2 and the container are loosely fitted, and the cap 1 can be removed from the container.

  At this time, it is possible to grasp the upper lid 3 and the cylindrical side wall 17 that has been torn by the breaking groove portion 18A, and further pull it upward to remove the cap body 2 remaining in the container, but the breaking groove portion 18A and the non-breaking groove portion 18B are It is provided via a cylindrical side wall 17 in which no groove is formed (in this embodiment, a finger-hanging portion 17b), and a force can be stably applied to the thickness portion of the cylindrical side wall 17 when pulled up.

  It should be noted that it is desirable that the fracture groove 18A and the non-breakage groove 18B are provided close to each other. In the present embodiment, in plan view, one end of the arc-shaped fracture groove portion 18A and the non-breakage groove portion 18B is provided so as to be substantially in contact with the longitudinal weakening portion 19 and the other end portion via the finger hook portion 17b. That is, the groove portion 18 is provided except for only the concave portion in the thickness direction of the cylindrical side wall 17. In the present embodiment, it is only necessary that at least one end of the fracture groove 18A and the non-breakage groove 18B is close to each other. By providing in this way, the groove portion 18 can be formed over a wide range of the cylindrical side wall 17, and the diameter at the time of attaching the cap to the stopper or the holding force to the container mouth portion is more stable. It can be.

  Further, the cap 1 has a groove portion 18 provided on the top surface 17a of the cap body 2 over substantially the entire circumference, and the bottom portion 18a and the bottom portion 18a of the fractured groove portion 18A and the non-breakable groove portion 18B constituting the groove portion 18 are the same. Since it is formed so as to be located at a depth, the diameter of the cap 1 when the cap 1 is plugged into the container and the holding force to the container mouth can be made uniform. Sometimes, the cap body 2 is slightly distorted, and no gap is generated between the cap body 2 and the upper lid 3 when the upper lid 3 is attached.

  Note that the breaking groove portion 18A and the non-breaking groove portion 18B of the present invention are not limited to a pair of groove portions as in the present embodiment, and include, for example, modifications such as two non-breaking groove portions facing the breaking groove portion.

  The present invention can be applied not only to a hinge cap but also to a screw cap. When the present invention is applied to the screw cap, a knob portion that is used by a user instead of the upper lid 3 or the hinge 4 to grip with a finger is provided in the vicinity of the axial direction weakening portion 19. The shape of the knob can be selected as appropriate.

1 Cap 2 Cap body 3 Upper lid
4 Hinge 4a End 5 Extraction cylinder
6 top wall 6a lower surface 6b contact surface 7 cylinder part 8 blocking wall 9 fissure 10 pull ring 11 locking cylinder 12 top wall 13 skirt part 14 flange part 15 outer ring 16 inner ring 17 side wall 17a top surface 17b finger hook part 17c inner circumference Surface 17d Fitting protrusion 18 Groove 18A Breaking groove 18B Non-breaking groove 18a Bottom 18b Circumferential weakening line 19 Axial weakening 20 Middle leg

Claims (4)

In a cap made of a synthetic resin consisting of a cap body plugged into the container mouth and an upper lid attached to the cap body,
The cap body includes a top wall and a cylindrical side wall,
Tubular side wall has a groove on the top surface of that which has a fitting protrusion on an inner peripheral surface thereof,
The groove portion includes a break groove portion having a circumferential weakening line therein, and a non-break groove portion provided so as to face the break groove portion through a portion of the cylindrical side wall where the groove portion is not formed. The
The synthetic resin cap , wherein the fracture groove is formed such that a bottom thereof is higher than the fitting protrusion in an axial direction and lower than a lower surface of the top wall .   The synthetic resin cap according to claim 1, wherein the fracture groove portion and the non-breakage groove portion are provided close to each other.   The synthetic resin cap according to claim 1 or 2, wherein the breaking groove portion and the non-breaking groove portion have the same depth. 4. The synthetic resin cap according to claim 1, wherein the circumferentially weakened portion is continuous with an axially weakened portion provided on the cylindrical side wall.

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