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JP-7855308-B2 - Hinge cap

JP7855308B2JP 7855308 B2JP7855308 B2JP 7855308B2JP-7855308-B2

Inventors

  • 山本 学
  • 桑原 和仁

Assignees

  • 株式会社吉野工業所

Dates

Publication Date
20260508
Application Date
20201030

Claims (4)

  1. A hinged cap consisting of a cap body that is attached to the mouth of the container body and an upper lid that is connected to the cap body via a hinge, The cap body comprises a partition that seals the mouth of the container body, a dispensing tube erected on the partition, and a ruptureable thin-walled weakened portion defined within the partition inside the dispensing tube, and a transition stopper that is securely attached to the top lid and, when opened, moves and holds toward the top lid side for opening. The transition plug is connected to the partition wall via a thin-walled weakened section, and has a bottom wall whose bottom surface slopes downward from the opposite side of the hinge towards the hinge side. A hinged cap characterized in that, after opening, when the container body is shaken with the lid closed to agitate the contents, even if some of the contents adhere to the bottom surface of the transfer stopper that is held in place on the top lid, a portion of the contents adhering to the bottom surface of the transfer stopper will flow down the bottom surface and into the container body due to the downward slope .
  2. The hinge cap according to claim 1, characterized in that the bottom wall has a reverse-sloping surface on the hinge side with a slope opposite to that of the bottom surface.
  3. The hinge cap according to claim 1 or 2, characterized in that the bottom wall has a bottom surface inclination angle of 3 to 35°.
  4. The hinge cap according to claim 1 or 2, characterized in that the bottom wall has a bottom surface inclination angle of 5 to 20°.

Description

This invention relates to a hinge cap used by being attached to a container body, and more particularly to a hinge cap having a transition plug that breaks the thin, weakened portion and moves to the upper lid side upon initial opening. Conventionally, in hinged caps consisting of a cap body attached to a container body and an upper lid connected to the cap body via a hinge, in order to ensure the airtightness of the container body, an opening portion was formed in the partition wall of the cap body by a breakable, thin-walled weakened portion as the intended opening for the pouring spout, and an opening portion equipped with a pull ring or the like was formed. However, opening the cap required removing the opening mechanism by pulling up a pull ring or similar device after opening the top lid, which was time-consuming and made it difficult for users with less strength to open. Therefore, one might consider eliminating the opening and pre-opening the spout. However, this would compromise the airtightness of the container body. For this reason, a conventional hinge cap has been developed (see, for example, Patent Document 1) that omits the pull ring, forms a transition stopper as the opening, and then joins it to the lid using ultrasonic bonding or similar methods. The transition stopper is then pulled up as the lid opens, breaking the weakened, thin section and thus opening the container. Furthermore, in the hinge cap described in Patent Document 1, since the transition plug needs to be joined to the upper lid by ultrasonic bonding or the like after molding, a hinge cap is also known in which a lifting portion erected on the transition plug is engaged with a locking portion suspended from the upper lid, thereby pulling up the transition plug together with the lifting portion as the upper lid opens, breaking the weakened portion and opening the lid (see, for example, Patent Document 2). Japanese Patent Publication No. 2014-221643Japanese Patent Publication No. 2015-34012 This is a side cross-sectional view showing the state before opening, with the hinge cap, which is the first embodiment of the present invention, attached to the container body.This figure shows the open state of a hinge cap immediately after manufacturing, which is the first embodiment of the present invention; (a) is a top view and (b) is a side cross-sectional view.This is a bottom view showing the hinge cap, which is the first embodiment of the present invention, in the open state immediately after manufacturing.This is a side cross-sectional view showing the hinge cap, which is the first embodiment of the present invention, in an opened and unplugged state.The following photographs show the results of a comparative experiment in which the inclination angle of the bottom surface of the transition plug of the hinge cap, which is the first embodiment of the present invention, was changed: (a) is the state after the first stirring when the inclination angle was set to 0°, (b) is the state of (a) after the 10th stirring, (c) is the state after the first stirring when the inclination angle was set to 6°, and (d) is the state of (c) after the 10th stirring.This is a side cross-sectional view showing the container body with the hinge cap, which is a second embodiment of the present invention, attached, before opening. Next, the hinge cap of the present invention will be described with reference to the drawings shown in the following embodiments. In the following explanation, as seen in Figure 1, the left direction is referred to as "front (opposite side of the hinge)", the right direction as "rear (hinge side)", the upward direction as "up", and the downward direction as "down". The hinge cap of this invention prevents the contents from dripping into the lid or outside the container when the lid is opened, even if the contents adhere to the bottom of the transfer stopper after the container body has been shaken to agitate the contents before use. Therefore, it can be widely applied as a hinge cap for containers that hold contents that require agitation.