JP2008100703A - Cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap which can suppress the splashing of a content at the time of unsealing by surely stopping the unsealing once when only an unsealing starting region has been opened, and can easily restart the unsealing without requiring a large pulling force. <P>SOLUTION: A fragile section which covers a mouth of a container, and is used for forming an opening for pouring out the content filled in the container is formed. The fragile section is formed into an annular shape having a starting side 7A which unseals the opening, and an end side 7B which ends the unsealing, and forms the opening. The fragile section has a protruding section 71 which protrudes to the outside in the radial direction connecting the starting side 7A and the end side 7B on the starting side 7A. In the unsealing starting region 7D which is formed of the protruding section 71, on the starting side 7A, an unsealing member which is gripped when the unsealing is performed is provided on the surface. At the fragile section, a pair of flat sections 72 which are formed outside in the radial direction orthogonal to the radial direction while continuing from an unsealing final end 71b at which the unsealing of the protruding section 71 ends are formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is provided with a cap that covers the mouth of a container, in particular, an annular fragile portion for forming an opening for pouring the contents filled in the container, and tearing the fragile portion to open the opening. It is related with the cap which can be opened.

  Conventionally, a cap is attached (plugged) to the mouth of a container filled with the contents at a high temperature of about 80 ° C. to 90 ° C. (hot), and then used for a container with a cap that is cooled by showering with water. As the cap, for example, a fragile portion for forming an opening for pouring the contents filled in the container is provided, and the fragile portion includes a start side for opening the opening and an end side for ending the opening. And a convex portion projecting outward in the radial direction connecting the start side and the end side is provided on the start side, and an upper end is provided on the opening end side of the convex portion. It is well known that a rib projecting toward the surface is provided, and an opening member that is gripped when opening is provided in the opening start region formed by the convex portion (the following patent document) 1).

When such a cap grips the opening member and pulls it toward the end of opening, a tensile force acts on the convex portion that forms the opening start region where the opening member is provided, and the convex portion is the opening start end. Opening is started by tearing from the side toward the opening end side. Here, since the rib is provided on the unsealing end side of the convex portion, the tearing of the fragile portion is prevented in the middle, and the unsealing can be temporarily stopped. Therefore, even if outside air flows into the container with a cap that is in a depressurized state due to cooling after high-temperature filling from the opening only in the opening start region, the contents are prevented from scattering from the opening to the outside. Can do.
Japanese Patent Laid-Open No. 11-227816

  However, in the conventional cap, the rib must be broken to resume the opening once the opening is stopped. Here, the ribs are formed so as to protrude in a build-up so as to prevent tearing of the fragile portion and temporarily stop the opening. Therefore, a great breaking force (opening) is required to break the rib and resume the opening. Force of pulling the member) is necessary, and it was troublesome to resume opening. Further, the contents may be scattered from the opening due to an impact when the rib is broken.

  Therefore, the present invention has been made in view of the above-described conventional problems, and when the opening start region only is opened, the opening is surely temporarily stopped to suppress scattering of the contents inside the container at the time of opening. It is another object of the present invention to provide a cap that can be easily opened again without requiring a large tensile force.

  The present invention has been made to solve the above problems, and the cap according to the present invention has a fragile portion for covering the mouth of the container and forming an opening for pouring out the contents filled in the container. The fragile portion is formed in an annular shape having a start side for opening the opening and an end side for ending the opening to form the opening, and the radially outer side connecting the start side and the end side. A cap having a convex portion projecting toward the start side, and an opening start region formed by the convex portion provided with an opening member to be gripped when the surface is opened. Is characterized by being provided with a pair of flat portions formed outwardly along a radial direction perpendicular to the radial direction, on the opening end side where the opening of the convex portion is completed.

  In the cap having such a configuration, when the cap is opened and the opening member is gripped and pulled toward the end of opening to form the opening, the opening is formed and the tension is formed on the convex portion forming the opening start region. The force acts, the convex portion is torn from the opening start end side toward the opening end side, and opening is started. When opening the fragile portion, the fragile portion is torn in order from the opening start side to the end side, but the side where tearing at each part of the fragile portion starts at this time is called the opening start end side, and the tearing ends. The side is called the unsealing end side.

  Here, when opening the opening, that is, when the convex part is torn for the first time, a relatively large tearing force (tensile force) is required, so that the convex part is torn vigorously (instantly) by that force. Will be. And, with the momentum, the tensile force acts on the flat portion continuous to the opening end side of the convex portion, but the flat portion is formed in the radial direction (in the opening direction) connecting the opening start side and the end side. The radial direction perpendicular to the radial direction), that is, the direction perpendicular to the direction in which the tensile force is applied, disperses the tensile force that violently tears the convex portion. Then, since the flat part is not torn, the tearing of the fragile part is temporarily stopped near the boundary between the convex part and the flat part. As a result, the opening is temporarily stopped in the state where only the opening start area is opened in the entire area to be the opening. To do.

  When the opening member is pulled again to resume the opening, a tensile force acts on the flat portion. Here, since the flat portion is a part of the fragile portion, the flat portion can be torn without applying a large tensile force.

  In particular, the fragile portion is preferably a thin groove portion continuous over the entire circumference of the ring, and can be torn stably and smoothly along the thin groove portion upon opening.

  In addition, the convex portion preferably includes a pair of first inclined portions that are inclined so as to approach on the opening start side and to separate on the end side, and a tensile force is applied to the opening start end side of the protruding portion at the start of opening. Concentrates and tears the convex part easily.

  Furthermore, the convex portion and the flat portion are preferably continuous via a curved connecting portion curved toward the end of opening, and the tearing direction is gradually changed from the convex portion to the flat portion. Therefore, it becomes easier to tear the flat part when opening again.

  Still further, it is preferable that the fragile portion includes a pair of second inclined portions that are continuous with the opening end side of the flat portion and incline so as to approach on the opening start side and separate on the end side, and restart the opening. Then, the opening area can be increased while ensuring stable tearing.

  Further, the fragile portion is a pair of curved portions that are continuous toward the unsealing end side of the second inclined portion and are curved outward in the radial direction perpendicular to the radial direction connecting the opening start side and the ending side. The tearing direction can be easily changed while ensuring stable tearing.

  Furthermore, it is preferable that the fragile portion includes a pair of third inclined portions that are continuous with the opening end side of the bending portion and are inclined so as to be separated on the opening start side and approached on the end side. Since the tensile force can be concentrated on the opening end side of the inclined portion, scattering of the contents inside the container at the end of opening can be effectively suppressed.

  Furthermore, it is preferable that the thickness of the flat portion is thinner than the thickness of other portions of the fragile portion, and the flat portion can be more easily torn when opening is resumed.

  Furthermore, it is preferable that a weakening portion is provided between the pair of flat portions along the radial direction perpendicular to the radial direction connecting the start side and the end side, and only the opening start region is more reliably opened. Opening can be temporarily stopped in the state.

  As described above, the cap according to the present invention is formed outward along the radial direction orthogonal to the radial direction connecting the opening start side and the end side continuously to the opening end side of the convex portion. Since the pair of flat portions are provided on the fragile portion, when opening the cap opening, tearing of the fragile portion can be temporarily stopped near the boundary between the convex portion and the flat portion, and then a large tensile force is applied. The flat part can be torn without adding. Therefore, when only the opening start region is opened, the opening is surely stopped once and the scattering of the contents inside the container at the time of opening can be suppressed, and the opening can be easily resumed. There is an effect.

Hereinafter, an embodiment of a cap according to the present invention will be described with reference to the drawings.
FIG. 1 shows a hinge cap 1 as a cap in the present embodiment. The hinge cap 1 includes a cap body 2 attached to a mouth of a container (not shown), and an upper lid 4 connected to the cap body 2 via a hinge 3. The hinge cap 1 is configured to be bilaterally symmetrical with respect to a reference center line C1 passing through the center point of the cap body 2 and the center point of the upper lid 4 when the upper lid 4 shown in FIG. 1 is opened. . The cap body 2 and the upper lid 4 are hingedly connected to each other on the rear side. Moreover, it is not restricted to the case where it is hinge-connected, For example, the cap of the aspect which screws the upper cover 4 to the cap main body 2 may be sufficient.

  The upper lid 4 has a rotation center line C2 passing through a midpoint between the center point of the cap body 2 and the center point of the upper lid 4 and a direction perpendicular to the reference center line C1 (left-right direction) as a center of rotation. A closing position for covering the cap body 2 and an opening position for opening the lid for the cap body 2 are configured to be rotatable. That is, the upper lid 4 is engaged with the cap main body 2 in an airtight state from above in the closed position, and in the opened position, the rotation center line C2 is aligned with the cap main body 2 in the direction of the reference center line C1 (front-rear direction). It can be freely rotated around the center. Accordingly, the upper lid 4 is positioned above the cap body 2 so as to cover the cap body 2 in the closed position, and is positioned on the side of the cap body 2 in the upside down direction with respect to the posture at the closed position. .

  As shown in FIGS. 1 and 2, the cap body 2 has a bottomed cylindrical shape and a pouring portion 5 that is fitted inside the mouth portion of the container, and a cylindrical shape that is fitted outside the mouth portion of the container. The outer wall portion 6 includes a continuous portion 62 that is connected to the extraction portion 5 so that the extraction portion 5 is on the inner side.

  The extraction part 5 includes a cylindrical peripheral wall part 51 and a bottom wall part 52 that closes the lower end side opening of the peripheral wall part 51. The peripheral wall portion 51 has a cylindrical shape whose axis is in the vertical direction, and a flange portion 511 extending outward is formed on the front half of the upper end portion. Further, a peripheral wall bulging portion 512 bulging outward is formed at the lower end portion of the peripheral wall portion 51 over the entire circumference, and in a state where the pouring portion 5 is fitted in the mouth portion of the container. The peripheral wall bulging portion 512 is engaged with the container in a pressure contact state.

  The bottom wall portion 52 is disposed on the center side (inner circumferential side) of the bottom horizontal portion 521 substantially horizontally, and extends obliquely upward toward the outside over the entire periphery of the bottom horizontal portion 521. And a bottom inclined portion 522. In the bottom wall portion 52, the peripheral edge portion of the bottom inclined portion 522 is integrally continuous with the lower end portion of the peripheral wall portion 51 and closes the lower end portion of the peripheral wall portion 51. In addition, the thickness of the bottom wall part 52 is 1 mm, for example.

  As shown in FIG. 3, the bottom wall portion 52 is provided with a thin groove portion 7 as a fragile portion on the back surface side (lower surface side). The thin groove portion 7 is formed in an annular shape so as to form an opening for pouring the contents filled in the container, and includes a start side 7A for opening the opening and an end side 7B for ending the opening. That is, the region surrounded by the thin-walled groove portion 7 is cut out so as to rise from the start side 7A (the rear side of the cap body 2) toward the end side 7B (the front side of the cap body 2) (in the direction of the arrow 7AB). Thus, an opening for pouring the contents is formed in the bottom wall portion 52. The thin groove portion 7 has an annular shape with a diameter connecting the start side 7A and the end side 7B (the reference center line C1) as a symmetric axis (hereinafter referred to as a symmetric axis line 7C).

  The thin groove portion 7 is formed in the bottom inclined portion 522 so as to surround the bottom horizontal portion 521. Specifically, the thin groove portion 7 is formed by cutting out the bottom wall portion 52 from the back surface side, and continuously forming an endless shape of the groove whose bottom portion is thin, and this groove is a bottom inclined portion. 522.

  The thin groove portion 7 includes, in order from the start side 7A to the end side 7B, a convex portion 71 projecting outward in the diameter (symmetrical axis 7C of the thin groove portion 7) connecting the start side 7A and the end side 7B, and the convex portion 71 A pair of flat portions 72 that are continuous with the opening end side 71b of the portion 71 and formed outward along a radial direction orthogonal to the radial direction, and are continuous with the opening end side 72b of the flat portion 72 and are opened A pair of second inclined portions 73 that incline so as to approach at the start side 7A and separate from each other at the end side 7B, and are connected to the opening end side 73b of the second inclined portion 73, and the opening start side 7A and the end side 7B A pair of curved portions 74 that curve outward in the radial direction perpendicular to the linking radial direction, and continuous to the unsealing end side 74b of the curved portion 74, are spaced apart on the opening start side 7A, and approach the end side 7B. And a pair of third inclined portions 75 that inclineThe opening start end side of each part is when the bottom wall 52 is torn and cut along the thin groove portion 7 so that the region surrounded by the thin groove portion 7 is raised from the start side 7A toward the end side 7B. Means the side where tearing at each part starts, and the opening end side of each part means the side where tearing ends.

  The convex portion 71 includes a pair of first inclined portions 711 that incline so as to approach on the opening start end side 71a and to separate on the opening end side 71b, and the opening start end portions 71a and 71a of the first inclined portion 711 are connected to each other. They are connected by the first connecting part 76. The first inclined portion 711 is formed in a linear shape inclined at, for example, 35 ° so as to be separated from the symmetrical axis 7C toward the opening end side 71a with respect to the symmetrical axis 7C of the thin groove portion 7. The convex portion 71 is located on the opening start side 7A of the thin groove portion 7, and therefore, the opening start side 7A of the thin groove portion 7 has a shape protruding outward along the direction of the symmetry axis 7C. Yes. A region surrounded by the convex portion 71, that is, a substantially triangular region surrounded by the first inclined portion 711 is formed as an opening start region 7D. In addition, the thickness of the 1st inclination part 711 is 0.2 mm, for example, Therefore, the groove depth of the 1st inclination part 711 is 0.8 mm.

  The flat portion 72 is formed to extend linearly in a direction orthogonal to the symmetry axis 7C, and is shorter than the length of the first inclined portion 711 (for example, one third of the length of the first inclined portion 711). About the length), the distance between the symmetrical axis 7C and the opening end side 71b of the first inclined portion 711 is shorter (for example, about half the length). The flat portion 72 is formed so that the opening start end side 72a is closer to the symmetry axis 7C than the opening end side 72b, and is a second connecting portion as a curved connecting portion curved to the opening end side 7B. 77 is continuous with the unsealing end side 71 b of the first inclined portion 711. Specifically, the second connecting portion 77 is curved so as to protrude inward of the region surrounded by the thin groove portion 7. Note that a pair of flat portions 72 are provided on the left and right sides through the symmetry axis 7C. Moreover, as shown in FIG. 4, the thickness of the flat part 72 is thinner than the thickness of the other part of the thin groove part 7, and is 0.15 mm, for example. Therefore, the groove depth of the flat portion 72 is deeper than the groove depth of the other portion of the thin groove portion 7, for example, 0.85 mm. Alternatively, the second inclined portion 711 and the flat portion 72 may be directly continuous without providing the second connecting portion 77.

  For example, the second inclined portion 73 is linear with an inclination angle (for example, 45 °) larger than the inclination angle of the first inclined portion 711 so that the opening end side 73b is separated from the symmetry axis 7C with respect to the symmetry axis 7C. Is formed. The second inclined portion 73 is formed to be longer than the flat portion 72 and slightly shorter than the first inclined portion 711. Note that a pair of second inclined portions 73 are provided on the left and right via the symmetry axis 7C. Further, the thickness of the second inclined portion 73 is thicker than the thickness of the flat portion 72, for example, 0.2 mm. Accordingly, the groove depth of the second inclined portion 73 is shallower than the groove depth of the flat portion 72, for example, 0.8 mm. The second inclined portion 73 is continuous with the unsealing end side 72b of the flat portion 72 via a curved third connecting portion 78 curved to the unsealing start side 7A. Specifically, the third connecting portion 78 is curved so as to protrude outward from the region surrounded by the thin groove portion 7. In addition, the 3rd connection part 78 is not provided but it can also comprise so that the flat part 72 and the 2nd inclination part 73 may continue directly. Moreover, the 2nd inclination part 73 is not restricted to linear form, For example, the curve form which bulges outward of the area | region enclosed by the thin groove part 7 may be sufficient.

  The curved portion 74 has a curved shape so as to bulge toward the outside of the region surrounded by the thin groove portion 7 in a direction orthogonal to the symmetry axis 7C. Specifically, the curved portion 74 has a large curvature at the opening start end side 74a and a small curvature at the opening end side 74b. In other words, the opening start end side 74a has an arc shape with a small diameter, and the opening end side 74b is formed in a curved shape so as to have an arc shape having a diameter larger than the diameter of the arc. The curved portion 74 is continuous with the unsealing end side 73b of the second inclined portion 73 via a curved fourth connecting portion 79 curved to the unsealing start side 7A. Specifically, the fourth connecting portion 79 is curved so as to bulge outward from the region surrounded by the thin groove portion 7. A pair of the curved portions 74 are provided on the left and right sides through the symmetry axis 7C. Therefore, the curved portions 74 approach each other at the opening start end sides 74a and 74a, and are separated from each other toward the middle portion. After that, they approach each other again toward the unsealing end side 74b, 74b. In addition, the thickness of the curved part 74 is thicker than the thickness of the flat part 72, for example, 0.2 mm. Therefore, the groove depth of the curved portion 74 is shallower than the groove depth of the flat portion 72, for example, 0.8 mm. In addition, the 4th connection part 79 is not provided, but it can also comprise so that the 2nd inclination part 73 and the bending part 74 may continue directly.

  The third inclined portion 75 is, for example, a second inclined portion so that the opening end side 75b is closer to the symmetric axis 7C with respect to the symmetric axis 7C, that is, the inclination is opposite to the inclination of the second inclined portion 73. It is linearly formed with an inclination angle (for example, 55 °) larger than the inclination angle of 73. The third inclined portion 75 is formed to be longer than the flat portion 72 and longer than the first inclined portion 711. Note that a pair of third inclined portions 75 are provided on the left and right sides through the symmetry axis 7C. Further, the thickness of the third inclined portion 75 is thicker than the thickness of the flat portion 72, for example, 0.2 mm. Therefore, the groove depth of the curved portion 74 is shallower than the groove depth of the flat portion 72. The third inclined portion 75 is tangentially continuous with the bending portion 74 on the unsealing end side 74 b of the bending portion 74. In addition, the third inclined portions 75 have curved fifth connections in which the unsealing ends 75b and 75b are curved toward the unsealing end side 7B, that is, bulge outward from the region surrounded by the thin groove portion 7. The parts 80 are connected. In addition, the 3rd inclination part 75 is not restricted to linear form, For example, the curve form which bulges outward of the area | region enclosed by the thin groove part 7 may be sufficient.

  In such a thin groove portion 7, the radial direction (symmetric axis 7C direction) connecting the start side 7A and the end side 7B coincides with the reference center line C1 direction, the start side 7A is close to the hinge 3, and the end side 7B is a hinge. 3 is provided on the bottom wall 52 so as to be far from the third. Specifically, the thin groove portion 7 has a symmetrical axis 7 </ b> C such that the convex portion 71 is on the rear side of the cap body 2 and the third inclined portion 75 (the fifth connecting portion 80) is on the front side of the cap body 2. It is provided along the front-rear direction of the cap body 2. In other words, the thin groove portion 7 has a symmetrical axis line 7C that coincides with the reference center line C1, and the convex portion 71 is close to the hinge 3 and the third inclined portion 75 (or the fifth connecting portion 80) is far from the hinge 3. In this way, the bottom wall portion 52 is formed on the back surface side. In addition, the bottom horizontal part 521 is located in the area | region enclosed by the thin groove part 7, and is located in the opening end side 7B from the opening start area | region 7D especially.

  Between both the flat parts 72, the weakening part 8 along the direction (left-right direction of the cap main body 2) orthogonal to the said symmetry axis 7C is provided. The weakened portion 8 is linearly formed from the vicinity of the unsealing start end side 72a of one flat portion 72 to the vicinity of the unsealing start end side 72a of the other flat portion 72, and the thickness thereof is the same as that of the first inclined portion 711. It is thicker than the wall thickness. In addition, the weakening part 8 can be suitably provided as needed, and may not be provided depending on circumstances.

  An unsealing member 9 is provided on the upper surface (front surface) of the unsealing start region 7D formed by the convex portion 71. As shown in FIG. 2, the opening member 9 is composed of a support column 91 erected upward on the upper surface of the opening start region 7D, and an annular shape formed forward from the upper end of the support column 91. The ring portion 92 is provided, and the ring portion 92 is configured to be substantially contained within the extraction portion 5.

  As shown in FIG.1 and FIG.2, the outer wall part 6 is comprised so that it can fit in a container opening part, and the axial line is a cylindrical shape which follows an up-down direction. Specifically, the outer wall portion 6 is provided at the lower end portion of the outer wall main portion 61 formed with an outer wall bulging portion 611 that is airtightly engaged with the mouth portion of the container, and at the upper end portion of the outer wall main portion 61. And a continuous portion 62 connected to the extraction portion 5.

  The outer wall main portion 61 has a substantially cylindrical shape whose axis extends vertically and the center of the inner diameter is displaced from the center of the outer diameter along the reference center line C1. That is, the outer wall main portion 61 is gradually thickened from one side (the front side of the cap body 2) to the other side (the rear side of the cap body 2). The outer wall main portion 61 may have a constant thickness.

  Further, on one side of the outer wall main portion 61, an outer wall notch portion 612 is provided at the upper end portion thereof. Specifically, the outer wall notch portion 612 is formed by notching the upper end portion of the outer wall main portion 61 obliquely downward from the upper surface 613 of the outer wall main portion 61, and centering on the reference center line C1. It is formed over a predetermined range on the left and right (relative to the longitudinal direction of the cap body 2). In the present embodiment, the outer wall notch 612 is formed in a range of about 30 ° on the left and right with respect to the reference center line C1. On the other hand, a breaking groove 12 is formed downward from the upper surface 613 of the outer wall main portion 61 on the other side, and the outer wall main portion 61 can be easily broken in the vertical direction by the breaking groove 12. It has become. Therefore, the outer wall notch 612 and the breaking groove 12 are arranged on the front side and the breaking groove 12 on the rear side so as to face the direction of the reference center line C1 (the front-rear direction of the cap body 2). Has been.

  An outer wall bulging portion 611 that bulges inward is formed on the inner surface side of the lower end portion of the outer wall main portion 61 over the entire circumference. The outer wall bulging portion 611 is configured to engage with the container in a press-contact state when the outer wall portion 6 is externally fitted to the container mouth portion.

  In addition, a continuous portion 62 extending inward is formed on the upper end portion of the outer wall main portion 61 over the entire circumference, and the upper surface 621 of the continuous portion 62 faces the upper surface 613 of the outer wall main portion 61. The receiving surface 10 is configured as one. That is, the receiving surface 10 is the upper surface of the outer wall portion 6, is a plane orthogonal to the vertical direction, that is, a horizontal surface, and is formed over the entire circumference of the peripheral wall portion 51 so as to surround the peripheral wall portion 51. Yes. Note that a part of the receiving surface 10 is cut off by the outer wall notch 612.

  The continuous portion 62 is connected to the peripheral wall portion 51 of the pouring portion 5, so that the pouring portion 5 is arranged on the inner side and the outer wall portion 6 is arranged on the outer side, so that the pouring portion 5 and the outer wall portion 6 are integrated. It has become. Specifically, the connecting portion 62 is connected to the peripheral wall portion 51 so as to be integrated with the peripheral wall portion 51 at a midway portion in the vertical direction of the peripheral wall portion 51, and accordingly, between the peripheral wall portion 51 and the outer wall main portion 61. A gap is formed, and the container mouth portion is inserted into the gap to attach the cap body 2 to the container mouth portion. At this time, the outer wall bulging portion 611 is engaged with the container mouth portion from the outside in a pressure contact state, and the peripheral wall bulging portion 512 is engaged with the container mouth portion from the inside in a pressure contact state. It is attached to the container mouth so as to be in an airtight state. Note that the lower end surface of the outer wall portion 6 is located below the bottom wall portion 52, and the outer wall bulging portion 611 is located below the peripheral wall bulging portion 512.

  Further, the connecting portion 62 is provided with an engaging protrusion 622 that protrudes upward from the upper surface 621 thereof. Specifically, the engagement protrusion 622 includes an engagement small protrusion 623 that protrudes outward at the tip, and is formed over the entire periphery near the boundary with the outer wall main portion 61. Yes. Therefore, the engagement protrusion 622 is formed in an annular shape at a position spaced outward from the peripheral wall 51, and a gap is formed between the engagement protrusion 622 and the peripheral wall 51 over the entire circumference. Has been. The outer wall notch 612 provided in the outer wall 6 is formed outward from the engagement protrusion 622. Therefore, the engagement protrusion 622 is notched by the outer wall notch 612. Without being continuous over the entire circumference. The receiving surface 10 and the engaging protrusion 622 constitute an engaging portion on the cap body 2 side. Further, the upper surface 6221 of the engagement protrusion 622 is formed horizontally.

  The top cover 4 includes a top plate portion 41, a skirt portion 42 extending from the peripheral portion of the top plate portion 41 to the back side of the top plate portion 41, and the top plate portion 41 spaced apart inward from the skirt portion 42. And an internal fitting portion 43 that protrudes from the back surface. The top plate portion 41 has a disk shape that is substantially the same diameter as the outer diameter of the outer wall portion 6. The skirt portion 42 is formed so as to extend from the outer peripheral edge portion of the top plate portion 41 to the back surface direction of the top plate portion 41, and the engagement portion on the upper lid 4 side is entirely formed at the tip portion thereof. It is provided over the circumference.

  Specifically, the engagement portion on the upper lid 4 side includes an airtight engagement portion 421 provided on the inner surface side of the distal end portion of the skirt portion 42 and an abutting surface 422 that is the distal end surface of the skirt portion 42. The airtight engagement portion 421 is formed so as to be continuous with the airtight protrusion 423, and an airtight protrusion 423 that protrudes inwardly from the contact surface 422 toward the proximal end of the skirt portion 42. And an engaging groove 424 that opens toward the direction, and is formed over the entire circumference. Further, the abutting surface 422 is a plane in a direction parallel to the surface direction of the top plate portion 41, and therefore, the tip end portion of the skirt portion 42 is formed flush. The upper surface of the airtight engagement portion 421, that is, the upper surface 4241 of the engagement groove 424 is a surface in a direction parallel to the surface direction of the top plate portion 41.

  The upper lid 4 includes a knob 44 on one side (front side). Specifically, the knob 44 is formed in the shape of a tongue piece outwardly over a predetermined range from side to side around the reference center line C1 at the tip of the skirt 42. The predetermined range of the knob 44 is slightly larger than the predetermined range of the outer wall notch 612 of the cap body 2.

  Further, the upper lid 4 includes a lid cutout portion 425 on the other side. Specifically, the cover notch 425 is formed by cutting a part of the tip of the skirt portion 42 in a direction parallel to the contact surface 422, and thus the contact surface 422 is formed by the cover notch. A part of it is cut off by 425 and cut off. The lid cutout portion 425 is provided on the rear side of the upper lid 4, specifically, at a position facing the knob portion 44. In the present embodiment, the lid notch portion 425 is within a predetermined range (for example, left and right via the reference center line C 1) A pair of outer wall notch portions 612 is provided within a range substantially equal to the predetermined range. The circumferential length of the lid notch 425 is shorter than the circumferential length of the outer wall notch 612.

  The inner fitting portion 43 has a substantially cylindrical shape, and is spaced apart from the skirt portion 42 on the inner side of the skirt portion 42 so that the axial direction thereof is along the direction orthogonal to the surface direction of the top plate portion 41. Projecting on the back surface of the portion 41. Therefore, a gap is formed between the skirt portion 42 and the inner fitting portion 43. Further, an inner fitting protrusion 431 protruding outward is formed at the distal end portion of the inner fitting portion 43 over the entire circumference, and the distal end side is tapered from the inner fitting protrusion 431. The front end surface of the inner fitting portion 43 is flush with the front end surface (contact surface 422) of the skirt portion 42.

  The cap body 2 and the upper lid 4 configured as described above are connected via a hinge 3. Specifically, the hinge 3 has one end side in the front-rear direction connected to the rear side of the cap body 2 and the other end side connected to the rear side of the upper lid 4. More specifically, the hinge 3 has one end side in the front-rear direction being an upper end portion of the outer peripheral surface of the outer wall main portion 61 and connected to a position corresponding to the fracture groove 12, and the other end side is an outer peripheral surface of the skirt portion 42. The front end portion is continuously provided at a position corresponding to the lid cutout portion 425. The lid notch 425 has an end in the circumferential direction outside the both ends in the left-right direction of the hinge 3. In this embodiment, the lid notch 425 is formed from both ends in the left-right direction of the hinge 3. Also, the side of each lid notch 425 far from the reference center line C1 is outside the both ends of the hinge 3 in the left-right direction.

Subsequently, a closed state in which the cap body 2 is covered with the upper lid 4 from above will be described.
As shown in FIG. 5A, when the upper lid 4 is rotated from the opened state shown in FIG. 1 with the rotation center line C2 as the center of rotation, the engaging portion on the cap body 2 side and the upper lid 4 side are rotated. The engaging portion engages in an airtight state. The engaging portion of the hinge cap 1 is configured by the engaging portion on the cap body 2 side and the engaging portion on the upper lid 4 side. Specifically, an engaging protrusion 622 standing on the upper surface (receiving surface 10) of the outer wall 6 of the cap body 2 is fitted into the tip of the skirt portion 42, and the engaging protrusion 622 and the upper lid 4 are fitted. The airtight engagement portion 421 provided on the inner surface side of the tip portion of the skirt portion 42 is engaged. More specifically, as shown in FIGS. 5B and 5C, the engagement small protrusion 623 of the engagement protrusion 622 and the engagement groove 424 of the airtight engagement portion 421 are engaged with each other. On the lower side of the small protrusion 623, the airtight protrusion 423 is engaged with the engagement protrusion 622 in a pressure contact state.

  Thus, since the airtight protrusion 423 is engaged with the engagement protrusion 622 in a pressure contact state, the cap internal space 11 is in an airtight state. In this engaged state, the upper surface (receiving surface 10) of the outer wall portion 6 and the tip surface (abutting surface 422) of the skirt portion 42 are in contact with each other, and the upper surface 6221 of the engaging protrusion 622 and the engaging groove 424 are in contact. The upper surface 4241 is in contact. In addition, the airtight engagement portion 421 is formed away from the contact surface 422 toward the proximal end portion of the skirt portion 42, the receiving surface 10 and the contact surface 422 are in contact with each other, and the airtight protrusion 423 is further formed. Are engaged with the engagement protrusion 622 in a press-contact state, and an engagement space X is formed over the entire circumference in a region surrounded by the engagement protrusion 622.

  Further, the inner fitting portion 43 is fitted into the upper end portion of the dispensing portion 5 in an airtight state. Specifically, the inner fitting portion 43 is fitted inside the peripheral wall portion 51 of the extraction portion 5, and the inner fitting projection portion 431 of the inner fitting portion 43 is engaged with the peripheral wall portion 51 in a pressure contact state. Thus, since the internal fitting protrusion 431 engages with the peripheral wall 51 in a pressed state, the cap internal space 11 is divided into an inner space 111 and an outer space 112.

  Further, the outer wall notch portion 612 is formed in a region corresponding to the knob 44 of the upper lid 4 in the closed state. Specifically, the outer wall notch portion 612 faces the fracture groove 12, that is, Since the knob 44 is provided on the front side of the outer wall 6 and the knob 44 is provided on the front of the skirt 42, the outer wall notch 612 is located below the knob 44 in the closed state. Therefore, it is difficult for dust and the like to accumulate in the outer wall notch portion 612 and the outer wall notch portion 612 is difficult to see from the outside, so that the appearance is improved and the commercial value can be improved.

  The lid notch 425 is formed in a region corresponding to a region where the upper lid 4 and the hinge 3 are connected. Specifically, the lid notch 425 is provided on the rear side of the upper lid 4. Since the hinge 3 is connected to the rear side of the upper lid 4, the lid notch 425 is covered by the hinge 3 in the closed state, that is, the lid notch 425 is disposed on the inner side of the hinge 3. It becomes the state. Therefore, it is difficult for dust or the like to accumulate in the lid cutout portion 425, and the lid cutout portion 425 is difficult to see from the outside, improving the appearance and improving the commercial value. In the present embodiment, as shown in FIGS. 6A and 6B, the cover notch 425 has an end in the circumferential direction that is outside the both ends in the left-right direction of the hinge 3. That is, in the closed state, the circumferential end of the lid notch 425 is not covered by the hinge 3. Therefore, it is possible to improve the air permeability of the engagement space X described later while preventing accumulation of dust and the like and improving the aesthetic appearance.

  As described above, in the closed state, the engagement protrusion 622 and the airtight engagement portion 421 are formed over substantially the entire outer periphery of the cap, so that in the closed state, the cap body 2 and the upper lid 4 are approximately the entire outer periphery. The engagement force in the closed state becomes stronger. Therefore, for example, the cap main body 2 and the upper lid can be securely engaged without unintentionally releasing the engagement between the cap main body 2 and the upper lid 4 during shower cooling after high temperature (hot) filling, and the upper lid 4 being opened. 4 can be engaged to keep the cap closed.

  Further, the outer wall 6 is provided with an outer wall notch 612 and the skirt 42 is provided with a lid notch 425 so that the engagement space X communicates with the outside. Even if the temperature changes, the engagement space X can be prevented from being in a reduced pressure state. Therefore, the suction of water from the outside due to the pressure reducing action of the engagement space X can be suppressed. Further, by providing the outer wall notch portion 612 and the lid notch portion 425, air can easily flow through the engagement space X from one notch portion to the other notch portion. Therefore, for example, when the outer space 112 that is closed and airtight is decompressed by shower cooling and water is sucked into the engagement space X and enters the engagement space X, or between the receiving surface 10 and the contact surface 422. Even when water intrudes by mistake, such as when water enters the engagement space X due to capillary action, the cap can be quickly dried by evaporating it. Therefore, it is possible to maintain a good sanitary state by suppressing the intrusion of water into the minute gap between the receiving surface 10 and the contact surface 422 or the engagement space X and the occurrence of mold.

Next, the opening operation | movement of the bottom wall part 52 for forming the opening which pours out the content with which the container was filled is demonstrated.
First, a finger is hooked on the knob portion 44 of the cap in the closed state, the engagement between the upper lid 4 and the cap body 2 is released, the upper lid 4 is rotated, and the upper lid 4 is opened (the state shown in FIG. 1). ), And then holding the ring portion 92 of the opening member 9 and pulling it toward the opening end side 7B (the front side of the cap body 2), the first inclined portion that forms the opening start region 7D via the column portion 91 A tensile force acts on 711 and the first connecting portion 76. Then, after the first connecting portion 76 is torn, the first inclined portion 711 is torn from the unsealing start end side 71a toward the unsealing end side 71b, and opening is started. Here, when opening is started, that is, when the bottom wall portion 52 is first torn along the thin groove portion 7, a relatively large tearing force (tensile force) is required, but the first inclined portion 711 is required. Is configured to be inclined so as to approach at the opening start end side 71a and to be separated at the opening end side 71b, so that a tensile force is applied to the opening start end side 71a of the first connecting portion 76 and the first inclined portion 711 at the start of opening. Concentrate and tear easily. And the 1st connection part 76 and the 1st inclination part 711 are teared vigorously (instantly), and continue to the opening termination | terminus side 71b of the 1st inclination part 711 via the 2nd connection part 77 with the force. The tensile force acts on the flat portion 72. Here, the flat portion 72 is formed in the radial direction perpendicular to the radial direction (the direction of the symmetric axis 7C of the thin groove portion 7) connecting the opening start side 7A and the terminal end side 7B, that is, a tensile force is applied. Since the direction is perpendicular to the direction, the tensile force that has breached the first inclined portion 711 is dispersed. Then, since the flat part 72 is not torn, the tearing of the thin groove part 7 is temporarily stopped. As a result, the unsealing is temporarily stopped in a state where only the unsealing start region 7D is opened in the entire region to be the opening surrounded by the thin groove portion 7. Therefore, when only the opening start region 7D is opened, the opening is surely stopped once and the scattering of the contents inside the container at the time of opening can be suppressed.

  When the unsealing member 9 is pulled again to resume the unsealing, a tensile force acts on the flat portion 72. Here, the flat portion 72 has a thin groove shape. In particular, since the thickness of the flat portion 72 is thinner than the thickness of the other portions of the thin groove portion 7, the flat portion 72 is flat without applying a large tensile force. The part 72 can be easily torn and the opening can be resumed.

  In addition, since the first inclined portion 711 and the flat portion 72 are continuous via the second connecting portion 77, the tearing direction is gradually changed, and the flat portion 72 is further torn when the opening is resumed. It has become easier.

  When the tearing end portion 72 b of the flat portion 72 is torn, a tensile force acts on the second inclined portion 73 via the third connecting portion 78. Here, since the 2nd inclination part 73 is comprised so that it may approach on the opening start end side 73a and it may space apart on the opening end side 73b, it can enlarge opening area, ensuring the stable tear. .

  Further, when the tearing end side 73 b of the second inclined portion 73 is torn, a tensile force acts on the bending portion 74 via the fourth connecting portion 79. Here, since the bending portion 74 has a shape that curves outward in a direction orthogonal to the symmetry axis 7C, it approaches the tearing direction from the direction away from the symmetry axis 7C while ensuring stable tearing. It can be easily changed in the direction of going.

  Furthermore, when tearing to the unsealing end side 74b of the bending portion 74, a tensile force acts on the third inclined portion 75 continuous to the unsealing end side 74b of the bending portion 74. Here, since the third inclined portion 75 is configured to be inclined so as to be separated at the opening start end side 75a and approached at the opening end side 75b, a tensile force is applied to the opening end side 75b of the third inclined portion 75. Since it can be made to concentrate, the scattering of the contents inside the container at the end of opening can be effectively suppressed.

  Moreover, it is preferable that the thin groove part 7 is a groove | channel shape which continues over the perimeter, and can be torn stably and smoothly at the time of opening.

  Furthermore, since the weakening portion 8 is provided, the opening can be temporarily stopped in a state where only the opening start region 7D is opened more reliably.

  In the present embodiment, the case where the thin groove portion 7 is formed so that the symmetry axis 7C thereof coincides with the reference center line C1 is described. However, the present invention is not limited to this. For example, the thin groove portion 7 has the symmetry axis 7C It may be provided so as to be orthogonal to the reference center line C1. Further, the thin groove portion 7 may be provided on the upper surface side of the bottom wall portion 52.

  Moreover, although this embodiment demonstrated the case where the thin groove part 7 was comprised by the cyclic | annular symmetrical line about the reference | standard centerline C1 as an axis of symmetry, it is not restricted to this, Asymmetrical may be sufficient.

  Furthermore, in this embodiment, the case where the thin-walled groove portion 7 is formed in an annular shape in which the bottom portion is formed by continuously connecting the thin-walled groove has been described. Thus, the thin groove portion 7 may be formed.

  Furthermore, in the present embodiment, a pair of first inclined portions 711 inclined so that the convex portion 71 approaches on the opening start side 7A and separates on the opening end side 7B, and the opening of both the first inclined portions 711 is performed. Although the case where the 1st connection part 76 between the start ends 71a is provided was demonstrated, it is not restricted to this, For example, the convex part 71 follows the direction parallel to the reference | standard centerline C1 from the opening start end side to the opening end side. In this case, a pair of facing portions formed in a straight line and a straight or curved facing connecting portion extending from the opening start side of both facing portions may be provided. Moreover, you may form the convex part 71 in the circular arc shape which swells to the opening start side 7A.

  Moreover, although this embodiment demonstrated the case where the thickness of the flat part 72 was thinner than another part among the thickness of the thin groove part 7, it is not restricted to this, It is set as uniform thickness in the whole thin groove part 7. You can also

  Furthermore, although the case where the outer wall notch portion 612 is provided on the front side of the outer wall portion 6 has been described in the present embodiment, the present invention is not limited thereto, and may be provided on the left and right sides of the outer wall portion 6, for example. Moreover, it is not restricted to providing one place, You may provide multiple places.

  Furthermore, in the present embodiment, the case where the lid notch 425 is provided on the rear side of the upper lid 4 is described. However, the present invention is not limited to this, and may be provided on the left and right sides of the upper lid 4, for example. Moreover, it is not restricted to providing in multiple places, You may provide only one place.

  Further, the cutout shapes of the outer wall cutout portion 612 and the cover cutout portion 425 can be appropriately changed as long as the engagement space X communicates with the outside.

The top view which shows the state which the upper cover of the cap which concerns on one Embodiment of this invention opened. AA sectional view taken on the line AA of FIG. The bottom view of a cap body. BB sectional drawing of FIG. (A) Sectional drawing which shows the state which the upper cover closed, (B) is the P section enlarged view of (A), (C) is the Q section enlarged view of (A). (A) The rear view which shows the state which the upper cover closed, (B) is the R section enlarged view of (A).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hinge cap, 2 ... Cap main body, 3 ... Hinge, 4 ... Top cover, 5 ... Outlet part, 6 ... Outer wall part, 7 ... Thin-walled groove part, 7A ... Opening start side, 7B ... Opening end side, 7C ... Axis of symmetry, 7D ... opening start region, 8 ... weakening portion, 9 ... opening member, 10 ... receiving surface, 11 ... cap internal space, 12 ... breaking groove, 41 ... top plate portion, 42 ... skirt portion, 43 ... internal fit , 44 ... knob part, 51 ... peripheral wall part, 52 ... bottom wall part, 61 ... outer wall main part, 62 ... connecting part, 71 ... convex part, 72 ... flat part, 73 ... second inclined part, 74 ... curved 75, the third inclined portion, 76, the first connecting portion, 77, the second connecting portion, 78, the third connecting portion, 79, the fourth connecting portion, 80, the fifth connecting portion, 91, the column portion, 92. ... Ring part, 111 ... Inner space, 112 ... Outer space, 421 ... Airtight engagement part, 422 ... Contact surface, 423 ... Airtight projection part, 424 ... Engagement Groove, 425 ... lid notch, 431 ... internal fitting projection, 511 ... collar, 512 ... peripheral wall bulge, 521 ... bottom horizontal part, 522 ... bottom inclined part, 611 ... outer wall bulge, 612 ... outer wall Notch part, 622... Engaging protrusion part, 623... Engaging small protrusion part, 711... First inclined part, C1... Reference center line, C2.

Claims (9)

A fragile portion for covering the mouth of the container and forming an opening for pouring the contents filled in the container is provided, and the fragile portion includes a start side for opening the opening and an end for opening the opening. An opening start region formed by the convex portion having a convex portion protruding outward in the radial direction connecting the start side and the end side. In a cap provided with an opening member to be gripped when opening on its surface,
The fragile portion is provided with a pair of flat portions formed outwardly along a radial direction perpendicular to the radial direction, continuously on the unsealing end side where the opening of the convex portion is finished. Characteristic cap.   The cap according to claim 1, wherein the fragile portion is a thin groove portion continuous over the entire circumference of the ring.   3. The cap according to claim 1, wherein the convex portion includes a pair of first inclined portions that are inclined so as to approach on the opening start side and separate on the end side. 4.   The cap according to any one of claims 1 to 3, wherein the convex portion and the flat portion are continuous via a curved connecting portion curved toward the end of opening.   The said weak part is equipped with a pair of 2nd inclination part which inclines so that it may approach on the opening side of the opening of the said flat part, and may space | separate on the completion | finish side. A cap according to any one of the above.   The fragile portion includes a pair of curved portions that are continuous toward the opening end side of the second inclined portion and curve outward in the radial direction perpendicular to the radial direction connecting the opening start side and the end side. The cap according to claim 5.   The said weak part is equipped with a pair of 3rd inclination part which inclines so that it may separate on the opening | closing termination | terminus side of the said curved part, and may approach on the completion | finish side at the opening side. The described cap.   The cap according to any one of claims 1 to 7, wherein a thickness of the flat portion is thinner than a thickness of the other portion of the fragile portion.   The cap according to any one of claims 1 to 8, wherein a weakening portion is provided between the pair of flat portions along a radial direction orthogonal to a radial direction connecting the start side and the end side. .

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