JP2013043651A - Container lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container lid which is constituted so that when an outer cap is turned in the opening direction in order to remove the outer cap from an inner plug, a breakable thin-walled line formed on the blocking wall of the inner plug is broken, and which ensure easily breaking property, prevention of falling of a region to be removed by breaking, the long and thin shape of the region to be removed, easy manufacture, and prevention of breaking of the breakable thin-walled line in fitting the outer cap to the inner plug.SOLUTION: A slender and cylindrical wall 36 to be locked is formed to be projected upward from the bottom edge coming into internal contact with the breakable thin-walled line, on the blocking wall of the inner plug. A cylindrical locking wall 58 is formed to be projected downward on the undersurface of a top surface wall 44 of the outer cap. A pair of outside locking projections 60a, 60b are formed on the inner peripheral surface of the locking wall 58. Means 38, 40 to be engaged are arranged on the wall to be locked of the inner plug and engaging means 66a, 66b are arranged on the pair of outside locking projections respectively. When the outer cap is turned in the opening direction, the engaging means cooperate with the means to be engaged to prevent the wall to be locked from moving in the center axis direction against the pair of outside locking projections.

Description

  The present invention relates to a container lid provided with an inner stopper fixed to a container and an outer lid attached to the inner stopper.

  As container lids for liquid seasonings such as soy sauce, edible oil, and dressings, a container lid having an inner stopper fixed to the mouth and neck of the container and an outer lid attached to the inner stopper is widely used in practical use. ing. The inner plug has a blocking wall extending substantially horizontally and a cylindrical mounting wall extending upward from the peripheral edge of the upper surface of the blocking wall. A removal region surrounded by a breakable thin line is defined on the closing wall, and a male thread is formed on the outer peripheral surface of the mounting wall. The outer lid has a top wall and a cylindrical mounting wall depending from the top wall. Female threads are formed on the inner peripheral surface of the mounting wall. The outer lid is attached to the inner plug by fitting the outer lid on the inner plug and screwing the female thread of the outer lid onto the male thread of the inner plug.

  In the typical example of the container lid of the said form, the tension | pulling ring is attached to the upper surface of the removal area | region of the inside stopper through the connection pillar extended upwards. When consuming the contents of the container, rotate the outer lid in the opening direction to release the engagement between the female screw of the outer lid and the male screw of the inner plug, and then remove the outer lid from the inner plug. Expose the tension ring. The pull ring is then pulled to break the breakable thin line to remove the removal region and create an outlet in the closed wall. In a typical example of such a form, after removing the outer lid from the inner plug, it is necessary to pull the pulling ring to break the breakable thin line to remove the removal region, and the usability is not always good. .

  In order to solve the problem as described above in the above typical example, in Patent Documents 1 to 4 below, when the outer lid is rotated in the opening direction in order to remove the outer lid attached to the inner plug from the inner plug. A container lid is disclosed that is configured such that a force is transmitted from the outer lid to the inner plug removal region to break the breakable thin line.

Specification and drawings of utility model registration application No. 46029 in 1977 JP 2005-289389 A JP 2007-238140 A JP 2008-308218 A

  Thus, in a container lid configured such that the breakable thin line is broken when the outer lid is rotated in the opening direction to detach the outer lid from the inner stopper, (1) excessive rotational torque on the outer lid. (2) The removal region removed by breaking the breakable thin line is detached from the inner plug together with the outer lid, and thus the outer lid is removed. It is not necessary to remove the removal area with a finger after removal, (3) The shape of the removal area defined by the breakable thin line, and thus the shape of the discharge port formed by removing the removal area, (4) It can be manufactured at a sufficiently low cost without requiring a complicated manufacturing process such as welding, which is not a circular shape but an elongated shape such as a substantially elliptical shape for smooth discharge of contents. 5) breakable thin line disposed on the inside plug when attaching the outer lid to the required as the inside plug is not entirely broken, it is desired to satisfy the requirement that. However, none of the container lids disclosed in Patent Documents 1 to 4 can satisfy all the above five requirements. The container lid disclosed in Patent Document 1 cannot satisfy the above requirements 1, 2 and 5, and the container lid disclosed in Patent Document 2 can satisfy the above requirements 4 and 5. The container lid disclosed in Patent Document 3 cannot satisfy the above requirements 1 and 3, and the container lid disclosed in Patent Document 4 cannot satisfy the above requirements 3 and 5. .

  Therefore, the present inventors, in the specification and drawings of Japanese Patent Application No. 2011-078740, as a container lid satisfying all of the above requirements 1 to 5, the inner plug fixed to the mouth and neck of the container, and It has an outer lid attached to the inner plug, the inner plug has a blocking wall and a cylindrical mounting wall extending upward from the peripheral edge of the upper surface of the blocking wall, and the blocking wall is surrounded by a breakable thin line. A strip-shaped removal region is defined, and a strip-shaped locked wall projecting upward from a lower end edge inscribed in the breakable thin line is disposed in the removal region. A male thread is formed on the outer peripheral surface, and the outer lid has a top wall and a cylindrical mounting wall that hangs down from the top wall, and in a region inside the mounting wall on the lower surface of the top wall. A pair of outer locking projections projecting downward are formed, and the inner peripheral surface of the mounted wall It provided a container closure internal thread which cooperates with external thread which is formed in the mounting wall is formed. Engagement means is provided on the locked wall of the inner plug, and engagement means is provided on the pair of outer locking projections of the outer lid so that the outer lid is in the opening direction with respect to the inner plug. When it is rotated, the locking wall is prevented from moving in the direction of the central axis relative to the pair of outer locking protrusions by the cooperation of the engaging means and the engaged means.

  However, the container lid previously proposed by the present inventors is an excellent one satisfying the above requirements 1 to 5, but according to the experience of the present inventors, it is not yet satisfactory. In particular, when the thickness of each part of the container lid is reduced in order to reduce the manufacturing cost by reducing the material used, a pair of outer locking projections are separately and independently formed on the lower surface of the top wall of the outer lid. Due to the arrangement, the outer lid is rotated in the opening direction with respect to the inner plug, the pair of outer locking projections are locked to the locked wall, and the locked wall is forced in the opening direction. When the breakable thin line is broken, the pair of outer locking projections are elastically bent, and this causes a problem that the breakable thin line is not always easily and reliably broken. It has been found.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem is to further improve the container lid previously proposed by the present inventors to reduce the material used and reduce the manufacturing cost. Even when the thickness of each part of the container lid is reduced for the purpose, the breakable thin line can be easily and reliably broken by rotating the outer lid in the opening direction with respect to the inner stopper. It is to masquerade.

  As a result of diligent studies and experiments, the present inventors have replaced a pair of outer locking projections on the lower surface of the top surface wall of the outer lid independently of each other, and placed the inner surface of the mounting surface on the lower surface of the top surface wall. It is found that the main technical problem can be achieved by forming a locking wall protruding downward in the region and arranging a pair of outer locking protrusions on the inner peripheral surface of the locking wall. It was.

That is, according to the present invention, as a container lid that achieves the main technical problem, a container lid having an inner stopper fixed to the mouth and neck of the container and an outer lid attached to the inner stopper,
The inner plug has a blocking wall and a cylindrical mounting wall extending upward from the peripheral edge of the upper surface of the blocking wall, and the blocking wall defines an elongated removal region surrounded by a breakable thin line. The removal region is provided with an elongated cylindrically shaped locking wall projecting upward from a lower end edge inscribed in the breakable thin line, and a male thread on the outer peripheral surface of the mounting wall Is formed,
The outer lid has a top wall and a cylindrical mounting wall that hangs down from the top wall, and a cylindrical locking wall that protrudes downward in a region inside the mounting wall on the lower surface of the top wall A pair of outer locking projections are disposed on the inner peripheral surface of the locking wall, and one of the pair of outer locking projections is engaged with the engaged region on one side in the longitudinal direction of the removal region. The other side of the pair of outer locking projections is located on the other side in the longitudinal direction of the removal region, and is positioned opposite to the outer surface of the stopping wall that is located upstream in the opening direction. It is positioned opposite to the outer surface located on the upstream side when viewed in the opening direction,
An engagement means is formed on the pair of outer locking projections, and an engagement means is formed on the locked wall, and the outer lid is rotated in the opening direction with respect to the inner plug. The cooperation of the engaging means and the engaged means prevents the locked wall from moving in the direction of the central axis relative to the locking wall.
A container lid is provided.

  Preferably, the engaged means includes a groove or a ridge formed on an outer surface located on the upstream side when viewed in the opening direction of the locked wall on one side and the other side in the longitudinal direction of the removal region, The engaging means includes a ridge or groove formed on a surface of the pair of outer locking projections facing the groove or the ridge of the locked wall, and the outer lid is in the opening direction. When rotated, the protrusions or grooves of the pair of outer locking protrusions engage with the grooves or protrusions of the locked wall, and thereby the locked protrusions against the outer locking protrusions. The wall is prevented from moving in the direction of the central axis. A single inner locking protrusion is formed on the lower surface of the top wall of the outer lid so as to protrude downward and be positioned between the pair of outer locking protrusions. The locked wall is positioned opposite to the inner surface of the locked wall on the downstream side as viewed in the opening direction on one side in the longitudinal direction and the opening direction of the locked wall on the other side in the longitudinal direction of the removal region A pair of locking pieces are also formed on the inner peripheral surface of the locked wall, and one of the locking pieces is one of the removal region. It is formed on the inner surface of the locked wall on one side in the longitudinal direction, and the other side of the locking piece is formed on the inner surface of the locked wall on the other side in the longitudinal direction of the removal region. When the outer lid is rotated in the opening direction, the inner locking projection is locked to the locking piece, whereby the locking wall It is preferred that is prevented from relative rotation in the closing direction relative 該被 locking wall. A plurality of ribs extending in the central axis direction are disposed at intervals in the circumferential direction on the inner peripheral surface of the locked wall other than the portion where the inner locking protrusions are opposed to each other. It is preferable. It is preferable that a plurality of ribs are disposed at intervals on the outer surface of the removal region on the lower surface of the blocking wall of the inner plug.

  In the container lid of the present invention, the cylindrical locking wall is formed on the lower surface of the top wall of the outer lid, and the pair of outer locking projections are disposed on the inner peripheral surface of the locking wall. A pair of outer locks that are connected to each other by the retaining action by the locking wall and also by the locking wall when the locking projection acts on the locked wall to force the locked wall in the opening direction The interaction between the walls effectively prevents the pair of outer locking projections from bending in the direction away from the locked wall, and thus breaks from the pair of outer locking projections through the locked wall of the inner plug. Force is effectively transmitted to the possible thin line, so that the breakable thin line is broken easily and reliably. When the outer lid is rotated in the opening direction, the engaging means disposed on the pair of outer locking protrusions and the engaged means disposed on the locked wall of the inner plug cooperate with each other. The locked wall is prevented from moving in the direction of the central axis with respect to the locking wall, and therefore the removal area removed by the breakage of the breakable thin wall line is attached to the outer lid without being detached from the outer lid. Is removed from the stopper. In addition, the container lid of the present invention can be manufactured at a sufficiently low cost without performing a complicated process such as welding. When the outer lid is attached to the inner plug as required, no force is transmitted to the breakable thin line of the inner plug, and the breakable thin line is not broken.

The front view which shows a suitable embodiment of the container lid comprised according to this invention in part in a cross section. The slope view of the inner stopper in the container lid of FIG. The front view of the inner stopper in the container lid of FIG. Sectional drawing of the inner stopper in the container lid of FIG. The top view of the inner stopper in the container lid of FIG. The slope view which shows the outer lid in the container lid of FIG. 1 in the inverted state. Sectional drawing of the outer cover in the container lid of FIG. Sectional drawing which shows the container lid of FIG. 1 in the state by which the outer lid | cover was mounted | worn as required to the inner stopper. The partial slope figure which shows the relationship between the latching wall of the inner stopper in the state shown in FIG. 8, and the latching protrusion of an outer cover. FIG. 2 is a cross-sectional view showing the container lid of FIG. 1 in a state where the outer lid is somewhat rotated in the opening direction in order to remove the outer lid from the inner stopper. The partial slope figure which shows the relationship between the latching wall of the inner stopper in the state shown in FIG. 10, and the latching protrusion of an outer cover. Sectional drawing which shows the container cover of FIG. 1 in the state which removed the outer cover from the inner stopper. The partial slope figure which shows the relationship between the latching wall of the inner stopper in the state shown in FIG. 12, and the latching protrusion of an outer cover.

  Hereinafter, a preferred embodiment of a container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.

  Referring to FIG. 1, a container lid constructed according to the present invention is attached to the inner plug 4 that is fixed to the mouth and neck of the container showing only the mouth and neck portion 2, and the inner plug 4. The outer cover 6 is provided. The mouth-and-neck portion 2 of the container, which can be formed from an appropriate synthetic resin such as polyethylene terephthalate, glass, or a metal thin plate, has a cylindrical shape as a whole and has an upper surface opened. A locking jaw portion 8 and a support ring 10 positioned below the locking jaw portion 8 are formed on the outer peripheral surface of the mouth and neck portion 2. The inner plug 4 can be injected or compression-molded from an appropriate synthetic resin such as soft polyethylene, and the outer lid 6 can be similarly injected or compression-molded from an appropriate synthetic resin such as polypropylene.

  The description will be continued with reference to FIGS. 2 to 5 together with FIG. 1. The inner plug 4 has a circular blocking wall 12 extending horizontally as a whole. It is important that an elongated removal region is formed in the central region of the blocking wall 12. In the illustrated embodiment, a substantially elliptical breakable thin line 14 is formed in the central region of the blocking wall 12 to define a substantially elliptical removal region 16 (see particularly FIGS. 4 and 5). I want to be) As can be clearly understood by referring to FIG. 4, the removal region 16 is displaced above the outer region of the breakable thin line 14, and the lower surface of the removal region 16 is outside the breakable thin line 14. Preferably, it is positioned substantially at the same level as or slightly above the upper surface of this region. On the lower surface of the blocking wall 12, a cylindrical hanging wall 18 that hangs from the outermost peripheral edge portion and an annular seal piece 20 that is located radially inward of the suspending wall 18 are formed. Further, in the region on the lower surface of the blocking wall 12 that is radially inward of the annular seal piece 20 and outside of the breakable thin line 14, a plurality of portions extending in parallel in the vertical direction in FIG. Reinforcing ribs 22 are formed. Each rib 22 may have a semicircular or rectangular cross-sectional shape, and an annular locking protrusion 24 is formed at the lower end of the inner peripheral surface of the hanging wall 18. On the upper surface of the blocking wall 12, a cylindrical mounting wall 26 extending upward from the outer peripheral edge portion and a substantially cylindrical pouring cylinder 28 positioned radially inward of the mounting wall 26 are formed. A male thread 30 is formed on the outer peripheral surface of the mounting wall 26. The upper end portion of the dispensing cylinder 28 is curved in an arc shape outward in the radial direction. As can be understood by referring to FIGS. 2 and 3, the upper peripheral surface portion (region radially outside the mounting wall 26) of the closing wall 12 extends over an angular range of 90 degrees in the circumferential direction 4. A number of arcuate limiting portions 32 are formed. The upper surface of each of the limiting portions 32 is inclined downward in the closing rotation direction of the outer lid 6 (the direction indicated by the arrow A in FIGS. 2 and 5). A limiting end surface 34 that extends substantially vertically is defined at the upstream end in the closing rotation direction.

  It is important that an upper surface of the blocking wall 12 is further formed with a locked wall 36 that protrudes upward from a lower end edge inscribed in the breakable thin line 14. It is preferable that the locked wall 36 has a substantially elliptical cylindrical shape that protrudes substantially vertically upward. A groove extending substantially horizontally on the outer surface of the locked wall 36 on the upstream side in the opening rotation direction of the outer lid 6 (the direction indicated by the arrow B in FIGS. 2 and 5) on one side in the longitudinal direction of the removal region 16 38 is formed. Similarly, although not shown in FIG. 2, the outer surface of the locked wall 36 on the upstream side in the opening rotation direction of the outer lid 6 also on the other side in the longitudinal direction of the removal region 16 is substantially horizontal. An extending groove 38 is formed. The locked wall 36 is further formed with locking pieces 40 extending in an arc shape downstream from the inner peripheral surface in the opening rotation direction of the outer lid 6 at both longitudinal ends of the removal region 16. . The base end of the locking piece 40 extends substantially vertically on the inner surface of the locked wall 36. The said groove | channel 38 and the latching piece 40 comprise a to-be-engaged means so that it may become clear from a later description. A plurality of reinforcing ribs 42 are formed on the inner peripheral surface of the locked wall 36 at portions corresponding to the portions where the grooves 38 are formed, and extend substantially vertically at intervals in the circumferential direction. ing. As clearly understood by referring to FIG. 2, both side surfaces of each of the ribs 42 are inclined at a slight inclination angle in a direction approaching each other upward, and an upper end surface of the rib 42 is an inner side. It is inclined downward toward

  6 and 7 together with FIG. 1, the outer lid 6 in the illustrated embodiment has a circular top wall 44 and a cylindrical skirt wall 46 depending from the outer peripheral edge of the top wall 44. . As shown in FIG. 1, a knurl (concave / convex shape) 48 is formed on the outer peripheral surface of the skirt wall 46 for preventing the slipping of a finger hung thereon. A cylindrical mounting wall 50 is formed on the lower surface of the top wall 44 so as to hang downward from its outer peripheral edge. A female thread 52 is formed at the lower part of the inner peripheral surface of the mounting wall 50. As clearly shown in FIG. 6, four restricted portions 54 that extend over an angle range of 90 degrees are formed on the lower end surface of the mounted wall 50. The lower surface of each of the restricted portions 54 is gradually inclined downward toward the closing rotation direction of the outer lid 6 (the direction indicated by the arrow A in FIG. 6), and each of the restricted portions 54 is substantially vertical. An extended restricted end face 56 is defined.

  A cylindrical locking wall 58 is also formed on the lower surface of the top wall 44 so as to hang downward in a region radially inward of the mounted wall 50. It is important that a pair of outer locking projections 60a and 60b are provided. As clearly understood by referring to FIG. 1 and FIG. 7, the locking wall 58 is gradually increased in thickness upward, and there is a portion where the thickness increases rapidly in the upper part. . The pair of outer locking protrusions 60a and 60b are attached to the inner peripheral surface of the locking wall 58 so as to face each other in the diameter direction, that is, at an angular interval of 180 degrees in the circumferential direction. Each of the pair of outer locking protrusions 60a and 60b has a generally slanted ball shape as a whole, and extends in an arc from the inner peripheral surface of the locking wall 58 inward in the radial direction toward the opening rotation direction of the outer lid 6. It has concave arcuate locking surfaces 62a and 62b. In each of the pair of outer locking projections 60a and 60b, two voids 64a and 64b are formed in order to reduce the amount of material used. On the respective locking surfaces 62a and 62b of the pair of outer locking projections 60a and 60b, protrusions 66a and 66b extending substantially horizontally are formed. As will be further described later, the protrusions 66a and 66b constitute engaging means and cooperate with a groove 38 formed in the locked wall 36 of the inner plug 4. If desired, contrary to the illustrated embodiment, a protrusion can be formed on the locked wall 36 and a groove can be formed on the outer locking protrusions 60a and 60b. On the inner surface of the top wall 44, there is also provided a single inner locking protrusion 68 that protrudes downward and is positioned between the pair of outer locking protrusions 60a and 60b. The inner locking projection 68 has a substantially parallelogram shape as a whole, and defines two convex arc-shaped locking surfaces 70a and 70b that face each other in the diametrical direction. The inner locking projections 68 are also formed with three voids 72 in order to reduce the amount of material used.

  As described above, the inner plug 4 and the outer lid 6 include the locked wall 36 of the inner plug 4, the pair of outer locking projections 60 a and 60 b and the inner locking projection 68 of the outer lid 6. The inner plug 4 is positioned in the outer lid 6 in the state shown in FIG. 8, that is, the peripheral edge of the upper surface of the closing wall 12 of the inner plug 4 is close to the lower end of the mounted wall 50 of the outer lid 6. They are combined with each other by forcibly pushing them in the axial direction until they come into contact. Thus, as clearly shown in FIG. 8, the male thread 30 formed on the outer peripheral surface of the mounting wall 26 of the inner plug 4 is formed on the inner peripheral surface of the mounted wall 50 of the outer lid 6. The state where the male thread 30 and the female thread 52 are screwed together is established by elastically overcoming the thread 52. In such a state, the restricting surface 34 of the restricting portion 32 formed on the outer peripheral edge of the upper surface of the closing wall 12 of the inner plug 4 has the restricted portion 54 formed on the lower end surface of the attached wall 50 of the outer lid 6. It is located opposite to the restricted surface 56, thereby preventing the outer lid 6 from rotating with respect to the inner plug 4 in the closing direction beyond some play. Further, the outer peripheral surface of the upper end portion of the locking wall 58 of the outer lid 6 is brought into close contact with the inner peripheral surface of the upper end portion of the dispensing tube 28 of the inner plug 4. The container lid combined as shown in FIG. 8 is attached to the mouth / neck part 2 of the container by forcibly lowering the container lid 2 to the state shown in FIG. Thus, the locking protrusion 24 formed on the inner peripheral surface of the hanging wall 18 in the inner plug 4 elastically climbs over the locking jaw portion 8 formed on the outer peripheral surface of the mouth-and-neck portion 2. The inner plug 4 is fixed to the mouth and neck portion 2 by being locked. Further, the sealing piece 20 of the inner plug 4 is caused to enter the mouth / neck portion 2, thereby sealing the mouth / neck portion 2.

  When consuming the contents of the container, a finger is put on the skirt wall 46 of the outer lid 6 and the outer lid 6 attached to the inner plug 4 is rotated in the opening direction (direction indicated by arrow B). When the outer lid 6 is rotated in the opening direction over an angle of about 25 degrees, the state shown in FIGS. 10 and 11 is obtained, and as clearly understood by referring to FIG. The locking surfaces 62a and 62b of the locking projections 60a and 60b are brought into contact with the outer surface of the locked wall 36, and the protrusions 66a and 66b formed on the locking surfaces 62a and 62b are locked. It is engaged with a groove 38 formed on the outer surface of the wall 36, thereby preventing the locked wall 36 from moving in the axial direction with respect to the pair of outer locking protrusions 60a and 60b. On the other hand, in the inner locking projection 68, the two locking surfaces 70 a and 70 b are brought into contact with the inner surface of the locked wall 36. The rib 42 disposed on the inner peripheral surface of the locked wall 36 is a portion where the locking surfaces 70a and 70b of the inner locking projection 68 abut (therefore, the inner locking projection 68 in the state shown in FIG. 9). The locking surfaces 70 a and 70 b are disposed in a portion other than the portion where the locking surfaces 70 a and 70 b are opposed to each other, and the locking surfaces 70 a and 70 b do not contact the rib 42. As understood by comparing FIG. 9 and FIG. 11, the inner locking projection 68 elastically rides over the locking piece 40 formed on the inner surface of the locked wall 36, and thus the inner locking projection. It is possible to prevent 68 from rotating in the closing direction (direction indicated by arrow B) relative to the locked wall 36. When the outer lid 6 is further rotated in the opening direction, the force applied to the locked wall 36 through the pair of outer locking projections 60a and 60b and the inner locking projection 68 as shown in FIGS. As a result, the breakable thin-walled line 14 is broken and the removal region 16 is removed from the closed wall 12 to generate a discharge port. A cylindrical locking wall 58 is formed on the lower surface of the top wall 44 of the outer lid 6, and a pair of outer locking projections 60 a and 60 b are attached to the inner peripheral surface of the locking wall 58. When the outer locking projections 60a and 60b act on the locked wall 36 to force the locked wall 36 in the opening direction, they are connected to each other by the holding action by the locking wall 58 and also by the locking wall 58. By the interaction of the pair of outer locking projections 60a and 60b, the pair of outer locking projections 60a and 60b is effectively prevented from bending in the direction away from the locked wall 36, and thus sufficiently easily. In addition, the breakable thin line 14 can be reliably broken. Further, the deformation of the blocking wall 12 is effectively suppressed by the plurality of inclined ribs 22 arranged at intervals on the outer surface of the removal region 16 on the lower surface of the blocking wall 12, and the locked wall 36 is also retained. The ribs 42 disposed on the inner peripheral surface of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the inner wall of the wall to prevent the deformation of the locked wall 36 due to the force applied through the pair of outer locking protrusions 60a and 60b, can be broken Breaking the thin line 14 is encouraged. The removal region 16 including the locked wall 36 removed from the blocking wall 12 is detached from the inner plug 4 together with the outer lid 6 without dropping from the outer lid 6. Thereafter, the contents can be discharged through the discharge port formed in the closed wall 12 of the inner plug 4. After the discharge of the necessary amount of contents is completed, the removal region 16 including the locked wall 36 is detached from the outer lid 6 as necessary, and the outer lid 6 is fitted on the inner plug 4, and then The female thread 52 formed on the inner peripheral surface of the mounted wall 50 of the outer lid 6 is screwed to the male thread 30 formed on the outer peripheral surface of the mounting wall 26 of the inner plug 4 by rotating in the closing direction. The outer lid 6 can be attached to the inner plug 4 again to close the discharge port. The upper end of the outer peripheral surface of the locking wall 58 of the outer lid 6 is brought into close contact with the outer peripheral surface of the upper end of the dispensing tube 28 of the inner plug 4, thereby achieving a sealing effect.

2: Container neck 4: Inner stopper 6: Outer lid 12: Blocking wall 14: Breakable thin line 16: Removal area 26: Mounting wall 30: Male thread 36: Locked wall 38: Groove (engaged) Combined means)
40: Locking piece (engaged means)
44: Top wall 50: Mounted wall 58: Locking wall 60a: Outer locking protrusion 60b: Outer locking protrusion 68: Inner locking protrusion 66a: Projection (engaging means)
66b: protrusion (engagement means)

Claims (5)

A container lid having an inner stopper fixed to the mouth and neck of the container, and an outer lid attached to the inner stopper,
The inner plug has a blocking wall and a cylindrical mounting wall extending upward from the peripheral edge of the upper surface of the blocking wall, and the blocking wall defines an elongated removal region surrounded by a breakable thin line. The removal region is provided with an elongated cylindrically shaped locking wall projecting upward from a lower end edge inscribed in the breakable thin line, and a male thread on the outer peripheral surface of the mounting wall Is formed,
The outer lid has a top wall and a cylindrical mounting wall that hangs down from the top wall, and a cylindrical locking wall that protrudes downward in a region inside the mounting wall on the lower surface of the top wall A pair of outer locking projections are disposed on the inner peripheral surface of the locking wall, and one of the pair of outer locking projections is engaged with the engaged region on one side in the longitudinal direction of the removal region. The other side of the pair of outer locking projections is located on the other side in the longitudinal direction of the removal region, and is positioned opposite to the outer surface of the stopping wall that is located upstream in the opening direction. It is positioned opposite to the outer surface located on the upstream side when viewed in the opening direction,
An engagement means is formed on the pair of outer locking projections, and an engagement means is formed on the locked wall, and the outer lid is rotated in the opening direction with respect to the inner plug. By the cooperation of the engaging means and the engaged means, the locked wall is prevented from moving in the central axis direction with respect to the locking wall.
A container lid characterized by that.   The engaged means includes a groove or a ridge formed on an outer surface located on the upstream side when viewed in the opening direction of the locked wall on one side and the other side in the longitudinal direction of the removal region. The means includes a protrusion or groove formed on a surface of the pair of outer locking protrusions facing the groove or the protrusion of the locked wall, and the outer lid is rotated in the opening direction. And the protrusions or grooves of the pair of outer locking protrusions engage with the grooves or protrusions of the locked wall, whereby the locked wall is centered with respect to the outer locking protrusions. The container lid according to claim 1, wherein the container lid is prevented from moving in an axial direction. A single inner locking protrusion is formed on the lower surface of the top wall of the outer lid so as to protrude downward and be positioned between the pair of outer locking protrusions. The locked wall is positioned opposite to the inner surface of the locked wall on the downstream side as viewed in the opening direction on one side in the longitudinal direction and the opening direction of the locked wall on the other side in the longitudinal direction of the removal region Is positioned opposite to the inner surface located downstream,
A pair of locking pieces are also formed on the inner peripheral surface of the locked wall, and one of the locking pieces is formed on the inner surface of the locked wall on one side in the longitudinal direction of the removal region. The other of the stoppers is formed on the inner surface of the locked wall on the other side in the longitudinal direction of the removal region. When the outer lid is rotated in the opening direction with respect to the inner plug, the inner locking protrusion The container lid according to claim 1 or 2, wherein the locking piece is locked to the locking piece, thereby preventing the locking wall from rotating relative to the locked wall in the closing direction.   A plurality of ribs extending in the central axis direction are disposed at intervals in the circumferential direction on the inner peripheral surface of the locked wall other than the portion where the inner locking protrusions are opposed to each other. The container lid according to claim 3.   The container lid according to any one of claims 1 to 4, wherein a plurality of ribs are disposed at intervals on an outer portion of the removal region on a lower surface of the closing wall of the inner plug.

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