JP6608244B2 - Composite container lid for mixing - Google Patents

Description

  The present invention relates to a mixing composite container lid that contains a mixture added to a content liquid contained in a container and is attached to the container.

  So-called resin caps are widely used as lids for containers filled with liquids such as beverages, but many products that are used by mixing other components in the container content liquid have been developed. I came. For example, beverages to which various essences and fragrances are added at the time of drinking fall under this type of product.

A so-called composite container lid has been proposed as a lid for dealing with such products.
For example, in FIGS. 5 and 6 of Patent Document 1, a cylindrical body 34 (lower lid) attached to the container mouth portion, and a container (upper lid) 6 attached to the inside of the cylindrical body 34 so as to be movable up and down. A composite container lid for mixing comprising:
In this mixing composite container lid, the container 6 has a cylindrical shape with the upper end closed by the ceiling wall 10, and the opening at the lower end is closed by the seal film 8. That is, the mixture to be mixed with the container liquid is accommodated in the container 6 that is closed by the seal film 8.
On the other hand, the cylindrical body 34 is provided with a cutter 62 extending so as to cross the inside thereof.

  In other words, in the mixing composite container lid of Patent Document 1, when the container 6 is lowered inside the cylindrical body 34, the sealing film 8 that closes the internal space of the container 6 in which the mixed agent is stored is formed. The mixture breaks, whereby the mixture contained in the container 6 falls and is mixed with the content liquid contained in the container.

  By the way, like the composite container lid for mixing described above, the sealing foil that closes the space in which the mixture is accommodated is broken by a cutter provided in the lid using the vertical movement of the lid. Therefore, in the structure in which the mixed agent is dropped into the container and mixed with the content liquid, usually the operation of shaking the container up and down (shake) with the composite container lid attached to the container mouth portion Is done. This is because the mixture is quickly dissolved or uniformly dispersed in the content liquid. Therefore, it is necessary to prevent the content liquid from leaking when such shaking is performed.

  For example, in the mixing composite container lid of Patent Document 1 described above, in a state where the container 6 is lowered and the seal film 8 is broken by the cutter 62, that is, in a state where the container 6 is lowered, the outer surface of the container 6 At least a part of the inner surface of the cylindrical body 34 is in close contact so as to secure a sealing structure after the sealing film 8 is broken, and measures are taken so that the content liquid does not leak even when the container is shaken. .

  However, in the conventionally known mixing composite container lid, the seal structure after the sealing film breaks becomes sweet, and when the container is shaken, there is often a disadvantage that the content liquid leaks, and the improvement is required. ing.

JP 2013-193964 A

  Accordingly, an object of the present invention is to provide a mixing system comprising a lower lid provided with a cutter and attached to a container mouth, and an upper lid in which a mixture to be mixed with the liquid in the container is accommodated in a space closed by a seal film. In the composite container lid, the sealing performance after breaking the sealing film by the cutter is firmly secured, and even when the container is shaken up and down, the composite container for mixing is effectively prevented from leaking the liquid contents To provide a lid.

  As a result of examining the sealing performance after breaking the sealing film of the composite container lid for mixing, the inventors have found that the end of the sealing film closing the space in which the mixture is accommodated by welding is after the sealing film is broken. The knowledge that it has a bad influence on the sealing performance has been obtained, and the present invention has been completed based on this knowledge.

According to the present invention, the lower lid attached to the container mouth portion and the mixture mixed with the content liquid contained in the container are accommodated, and are fitted over the lower lid and can be pushed in. In the composite container lid for mixing consisting of a fixed upper lid,
The lower lid includes a cylindrical wall provided with an engagement portion with the container mouth portion on the inner surface, and an annular flange extending inward from the inner surface of the cylindrical wall at a position above the engagement portion. A cutter extending axially upward, and a seal ring extending axially upward from the upper surface of the annular flange so as to surround the cutter,
The upper lid includes a ceiling wall and a circumferential side wall descending from a circumferential end of the ceiling wall, and a circumferential ring descending at an interval from the circumferential side wall on the inner surface of the ceiling wall Have
A mixture storage chamber is formed by the circumferential ring, and the mixture is confined in the storage chamber at a lower end portion of the circumferential ring in a state where the mixture is stored in the storage chamber. In addition, the sealing film is fixed by heat fusion,
In an initial state where the upper lid is fitted and fixed over the lower lid, the cutter is in a non-contact position with the seal film. A seal structure is formed by adhesion between the inner surface of the seal ring and the outer surface of the circumferential ring, thereby forming a mixable state in which the mixed material can be dropped into the container and mixed with the content liquid,
Provided is a composite container lid for mixing, wherein a convex portion or a concave portion for regulating a film end is formed on the upper surface of the annular flange at a position inward of a base portion of the seal ring. Is done.

In the composite container lid for mixing according to the present invention, it is desirable to employ the following aspects.
(1) The said convex part or recessed part is formed with the inclined surface which controls the circumferential edge part of the said sealing film protruded from the lower end part of the said circumferential ring.
(2) The convex portion or the concave portion is formed to be spaced inward from the seal ring.
(3) The convex portion has an annular shape or a plurality of arc shapes.
(4) The concave portion has an annular shape.

  The greatest feature of the composite container lid for mixing according to the present invention is that the convex portion for regulating the film end that prevents contact between the circumferential end of the sealing film protruding from the lower end of the circumferential ring and the inner surface of the sealing ring Alternatively, the concave portion is provided in the annular flange of the lower lid.

That is, the mixture storage chamber for storing the mixture to be mixed with the liquid in the container is formed by a circumferential ring descending from the inner surface of the ceiling wall of the upper lid, and this mixture storage chamber is formed at the lower end of the circumferential ring. By closing the sealing film by heat sealing (heat sealing), with the lower lid attached to the container, the upper lid is pushed down and the sealing film is broken by the cutter provided on the lower lid. The mixture contained in the mixture accommodation chamber falls and is mixed with the container contents. The sealing performance at this time is achieved by bringing the outer surface of the peripheral ring of the upper lid into close contact with the inner surface of the seal ring provided on the lower lid.
However, the sealing film that is heat-sealed to the lower end of the circumferential ring is generally in a state where the circumferential edge portion protrudes from the lower end of the circumferential ring. This is because the sealing film must be firmly heat-sealed to the entire lower end of the circumferential ring. The protruding portion of such a sealing film is cooled in a state where the resin flows to the outside by pressurization at the lower end of the circumferential ring and solidified at the circumferential edge portion (the protruding portion) of the sealing film. Therefore, the circumferential edge (extruded part) of the seal film is firmly fixed, and as a result, the base part of the seal ring that should be in close contact with the outer surface of the circumferential ring is pushed outward, A gap is formed between the two, and the sealing performance is impaired. In this case, if the operation of shaking the container up and down (shaking) is performed in order to more uniformly mix the mixture with the container contents liquid, the container contents liquid leaks to the outside.

  However, in the present invention, a convex or concave portion for restricting the film end is provided to prevent contact between the circumferential edge of the seal film protruding from the circumferential ring and the inner surface of the seal ring. Therefore, it is possible to effectively avoid a decrease in sealing performance due to the peripheral edge portion of the sealing film.

The schematic sectional side view which shows the composite container cover for mixing of this invention of the state with which the container opening part was mounted | worn. It is the top view (A), side view (B), and bottom view (C) which show the lower cover in the composite container cover for mixing of FIG. FIG. 3 is a development view of the inner surface of the upper cylindrical wall of the lower lid of FIG. 2. It is the top view (A), side view (B), and bottom view (C) which show the upper cover in the composite container cover for mixing of this invention. FIG. 2 is a schematic cross-sectional side view showing a state in which the upper lid is pushed into the lower lid attached to the container mouth portion in the mixing composite container lid of FIG. 1. The elements on larger scale for demonstrating the form of the convex part for film edge part restrictions provided in the lower cover of FIG. 2, and its function. The elements on larger scale for demonstrating the form of the recessed part for film edge part regulation which can be provided in the lower cover of FIG. 2, and its function.

Referring to FIG. 1, the composite container lid for mixing according to the present invention, indicated as a whole by 1, has a mouth portion (indicated by 90 in FIG. 1) of a container filled with liquid contents (content liquid). Used).
For example, a thread 91 for engaging a cap is provided above the support ring 93 on the outer surface of the mouth portion 90 of the container, and a normal screw cap (FIG. 1) is provided in a container filled with the content liquid. (Not shown in). When taking out (pouring out) the contents, the screw cap is pivoted in the opening direction to be removed from the mouth part 90 of the container, and the contents are taken out by tilting the container. In the case of mixing with the liquid, after removing the screw cap, the mixing composite container lid of the present invention is attached to the container opening 90.

In addition to FIG. 1, referring to FIGS. 2 to 4, the composite container lid 1 of the present invention roughly includes a lower lid 3 that is screwed into the mouth portion 90 of the container, and the lower lid. 3, and an upper lid 5 that is fitted and fixed over the upper lid 5. A mixture that will be described later is accommodated in the upper lid 5.
That is, the composite container lid 1 is commercially available in a state where the upper lid 5 is fitted and fixed on the lower lid 3 and is replaced with a normal cap mounted on the container mouth portion 90 when used. (The state shown in FIG. 1), then, a predetermined operation is performed, and the mixture is mixed with the liquid in the container and used.
Of course, the composite container lid of the present invention is not used in place of a normal screw cap, but is shown in FIG. As shown in FIG.

  The lower lid 3 has a cylindrical wall 7 as a main body, and an annular flange 9 extending inwardly from an inner surface of the cylindrical wall 7 (that is, an opening 10 in the central portion). Is formed). As can be understood from FIGS. 1 and 2B, the annular flange 9 projects outward in the radial direction, and the cylindrical wall 7 has a diameter of the annular flange 9 that projects outward. It is partitioned into a small lower cylindrical wall 7a and a large-diameter upper cylindrical wall 7b. Of course, depending on the size or the like of the container opening 90, the annular flange 9 may not protrude outward in the radial direction, and the outer surface of the cylindrical wall 7 may have a straight shape.

  A thread 11 for engagement with the container mouth 90 is formed on the lower portion of the cylindrical wall 7 having the above-described form, that is, on the inner surface of the lower cylindrical wall 7a, and further on the lower surface of the annular flange 9. Is formed with an inner ring 13 extending downward with a space from the inner surface of the lower cylindrical wall 7a. That is, the lower lid 3 is put on the container mouth portion 90, and the lower lid 3 is turned in the closing direction so that the engaging thread 11 is formed on the outer surface of the container mouth portion 90 and the screw 91. As a result, the lower lid 3 is screwed to the container mouth 90, and the upper end of the container mouth 90 is connected to the inner ring 13 and the lower cylindrical wall 7a by such screw mounting. When the inner ring 13 comes into close contact with the inner surface of the container mouth portion 90, the lower lid 3 screwed to the container mouth portion 90 is stably held.

Further, a seal ring 15 is erected on the upper surface of the annular flange 9 so as to surround the opening 10 in the center portion. Further, the annular flange 9 extends across the opening 10 and extends upward. A plurality of directional cutters 17 are formed.
The cutter 17 is a member for breaking a seal film 25 to be described later, and the seal ring 15 is for ensuring the sealing performance of the mixing composite container lid 1 (lower lid 3) after the seal film 25 is broken. It is.

  As shown in FIG. 2A, the plurality of cutters 17 are formed so as to cross each other at the center and leave the opening 10. As shown in FIG. 1, each of the cutters 17 has a jagged shape with a sharp upper end, and particularly has a mountain shape with a sharp central portion. Each of the cutters 17 is integrally connected to a holding piece 17a that rises from the inner peripheral edge of the annular flange 9, whereby each cutter 17 is stably held.

  Further, a broken fragment urging protrusion 19 is provided on the inner peripheral edge of the annular flange 9 at a position between the holding pieces 17a. The urging protrusion 19 is a member for pushing and spreading the remaining piece of the seal film 25 broken by the cutter 17 so as not to close the opening 10.

  By the way, the upper lid 5 is attached to the lower lid 3 provided with the annular flange 9 described above, and the upper lid 5 has a ceiling wall 20 and a circumferential side wall descending from a circumferential end of the ceiling wall 20. 21. In this example, as can be understood from FIG. 1, the ceiling wall 20 has a flat plate shape, but may have an upwardly convex dome shape.

  A circumferential ring 23 is lowered at the center of the inner surface of the ceiling wall 20 of the upper lid 5, and the lower end of the circumferential ring 5 is closed by heat sealing the sealing film 25. The sealing film 25 is usually a metal foil such as an aluminum foil coated with a heat-sealable resin, and the film 25 is thermally welded and fixed to the lower end of the circumferential ring 23 by heat sealing. It is what is done.

  In this way, the mixture containing chamber 27 is formed by the circumferential ring 23 whose lower end is closed by the sealing film 25. That is, in the mixing composite container lid 1 of the present invention, the mixture to be mixed with the container liquid is accommodated in the mixture storage chamber 27 of the upper lid 5.

  Further, a base ring 29 is formed on the inner surface of the ceiling wall 20 on the outer side of the circumferential ring 23. The base ring 29 has an outer diameter substantially equal to the inner diameter of the upper cylindrical wall 7 b of the lower lid 3, and the upper lid 5 is stably held by the lower lid 3 from the lower end of the base ring 29. A positioning piece 31 is provided.

  In this example, as shown in the bottom view of FIG. 4C (the seal film 25 is omitted in this figure), the positioning pieces 31 are arranged at an appropriate interval in the circumferential direction. The book is formed. This number is not particularly limited, and can be, for example, one. Usually, the upper lid 5 attached to the lower lid 3 is stably held, and the closing or opening operation described later is stably performed. In order to do this, it is desirable to form a plurality of lines so that they are not point-symmetric with respect to the center O of the lid 5, and more preferably even numbers. Further, the positioning piece 31 may be formed directly on the inner surface of the ceiling wall 20 without using the base ring 29. However, in order to prevent deformation of the positioning piece 31 at the time of closing and opening, It is preferable to provide positioning pieces 31 on the base ring 29.

  On the other hand, a knurl 33 is formed on the outer surface of the peripheral side wall 21 of the upper lid 5 so that a turning operation with a finger of the upper lid 5 can be easily performed.

Furthermore, a first locking projection 35 for preventing the upper lid 5 attached to the lower lid 3 from slipping out is provided on the inner surface of the peripheral side wall 21 so as to prevent the first engagement. A second locking protrusion 37 that restricts the upward movement of the upper lid 5 is provided at a position above the locking protrusion 35.
That is, the first locking projection 35 stably holds the initial engagement state between the lower lid 3 and the upper lid 5 by preventing the upper lid 5 from slipping out. The protrusion 37 stably holds the state in which the upper lid 5 is pushed into the lower lid 3 in a state where the lower lid 3 is attached to the container opening 80 due to the rise restriction of the upper lid 5.

  In the present invention, the upper lid 5 provided with various members as described above is attached to the lower lid 3, the lower lid 3 is attached to the container opening 90 of the composite container lid 1, and the sealing film is formed by pushing the upper lid 5. In order to effectively avoid leakage of the container contents during mixing of the mixture contained in the mixture containing chamber 27 and the container contents liquid, the upper cylindrical wall 7b of the lower lid 5 is It has a form like this.

  In particular, referring to the developed view of the inner surface of the upper cylindrical wall 7b of FIG. 3 and the top view of the lower lid 3 of FIG. 2 (A) together with FIG. The shallow grooves 39 and the deep grooves 41 that engage with the five positioning pieces 31 are provided corresponding to the number of the positioning pieces 31. For example, in the illustrated example, four shallow grooves 39 and four deep grooves 41 are formed.

The shallow groove 39 and the deep groove 41 are formed by thinning the inner surface of the upper cylindrical wall 7b. The shallow groove 39 extends shallowly downward from the upper end of the upper cylindrical wall 7b. Is adjacent to the shallow groove 39 in the closing direction and extends deeply downward from the upper end. Each of the shallow grooves 39 and the deep grooves 41 has a circumferential width substantially equal to that of the positioning piece 31 and is formed in such a size as not to rattle in the circumferential direction when the positioning piece 31 is engaged. Has been.
A temporary locking small protrusion (ratchet) 43 is formed at the circumferential end of the shallow groove 39 on the deep groove 41 side.

  Furthermore, the outer surface of the upper end portion of the upper cylindrical wall 7b is engaged with the first locking projection 35 and the second locking projection 37 of the upper lid 5 described above to prevent the upper lid 5 from slipping off or An upper lid locking projection 45 for restricting the rise of the upper lid 5 is provided. As shown in FIG. 2, the upper lid locking projection 45 has notches 45a formed at regular intervals in the circumferential direction so as to relieve distortion during molding.

  That is, the admixture is accommodated in the admixture containing chamber 27, and the upper lid 5 in which the admixture containing chamber 27 is closed by the seal film 25 is put on the lower lid 3 (upper cylindrical wall 7b) and plugged. As a result, the first locking projection 35 provided on the lower portion of the peripheral side wall 21 of the upper lid 5 rides over the upper lid locking projection 45, and the upper lid 5 is completely covered by the engagement with the projection 45. Porosity is prevented. In addition, with the stopper, the lower portion of the positioning piece 31 described above is engaged with the shallow groove 39, and the upper lid 5 is prevented from being lowered further deeply. Movement to the capping direction side with respect to the lower lid 3 of the upper lid 5 is restricted. In this way, the upper lid 5 is stably held by the lower lid 3, and the lowering of the upper lid 5 is restricted by the shallow groove 39, so that the sealing film 25 is not broken by the cutter 17 due to the lowering of the upper lid 5. . That is, in such a state where the upper lid 5 is mounted, the composite container lid 1 is sold together with a container in which a normal cap is mounted on the container mouth portion 90. In this state, the seal film 25 is sold. And the cutter 17 are held in a non-contact state.

Further, when the composite container lid 1 is attached to the container mouth portion 90, the lower lid 5 is put on the container mouth portion 90 with the upper lid 3 attached to the lower lid 5 as described above, and the upper lid 5 is closed. Rotate in the direction. At this time, the movement of the upper lid 5 in the closing direction with respect to the lower lid 3 is restricted by the temporary locking small protrusions 43. Therefore, the lower lid 3 pivots in the closing direction together with the upper lid 5, and the container port 90 is screwed. Due to the thread engagement between the strip 91 and the thread 11 of the lower lid 3, the lower lid 3 is threadedly mounted on the container opening 90 in a state where the upper lid 5 is mounted, resulting in the state shown in FIG. This state is the initial state of the upper lid 5.
In addition, when using this composite container lid by replacing it with a normal cap attached to the container mouth part 90, after opening and removing the normal cap attached to the container mouth part 90 The above operation is performed.

As described above, after the composite container lid 1 is mounted on the container opening 90, when the upper lid 5 is further turned in the closing direction, the lower end portion of the positioning piece 31 of the upper lid 5 is located on the closing side of the shallow groove 39. The small protrusion 43 for temporary locking provided at the end in the circumferential direction is overcome and positioned on the deep groove 41. Accordingly, when the upper lid 5 is pushed in this state, the positioning piece 31 is lowered along the deep groove 41 and the lower end of the circumferential ring 23 is lowered together with the sealing film 25 as shown in FIG. Thus, the seal film 25 is broken by the cutter 17 provided on the annular flange 9 of the lower lid 3. Further, the remaining pieces of the broken seal film 25 are pushed and spread by the broken piece biasing projections 19. Accordingly, the mixture contained in the mixture containing chamber 27 is not hindered by the remaining pieces and falls through the opening 10 in the annular flange 9 and is mixed with the liquid in the container.
The state shown in FIG. 5 is the pushed-in state (mixable state) of the upper lid 5.

Further, in the pushed state of the upper lid 5 shown in FIG. 5, the above-described second locking projection 37 of the upper lid 5 rides on the upper lid locking projection 45 on the upper end of the upper cylindrical wall 7 b of the lower lid 3. The upper cover 5 is restricted from being lifted by engagement with the protrusion 45, and the upper and lower rattling of the upper cover 5 is effectively prevented. Furthermore, since the positioning piece 31 of the upper lid 5 penetrates deeply into the deep groove 41, the circumferential play of the upper lid 5 is also effectively prevented. In this state, the outer surface of the circumferential ring 23 is the lower lid. 3 is in close contact with the inner surface of the upper position of the seal ring 15 rising from the annular flange 9, thereby ensuring the sealing performance after the sealing film 25 is broken.
Therefore, when the container is shaken up and down (shake) in the state of FIG. 5, the mixture is uniformly mixed with the liquid in the container.

  As can be understood from the above description, the engagement force of the temporary locking small projection 43 provided in the shallow groove 39 needs to be larger than the closing torque of the lower lid 3 with respect to the container mouth portion 90. is there. When this engagement force is smaller than the closing torque, the upper lid 5 is turned and the lower lid 3 is screwed to the container mouth 90 while the seal film 25 and the cutter 17 are maintained in a non-contact state. Because it becomes impossible to. Accordingly, the height, thickness, etc. of the temporary locking small protrusions 43 are set so that such engagement force is exhibited. In addition, as long as an engagement force equal to or greater than the closing torque is exerted, it is not necessary to provide the temporary locking small protrusions 43 in all of the plurality of shallow grooves 39. For example, at least one of the plurality of shallow grooves 39 is temporarily provided. It is only necessary that the small locking protrusion 43 is formed. Further, depending on the number of shallow grooves 39, if the temporary locking small protrusions 43 are formed on all of them, it may be difficult for the positioning piece 31 to get over the temporary locking small protrusions 43. Because there is, it needs attention. For example, in this example, as shown in FIG. 2 (A), out of the four shallow grooves 39, two shallow grooves 39 are provided with small protrusions 43 for temporary locking.

  After the seal film 25 is broken by pushing the upper lid 5 as described above and the mixture is mixed with the liquid in the container, the upper lid 5 is swung in the opening direction so that the lower lid 3 By engaging with the deep groove 41, it rotates in the direction of opening with the upper lid 5, and as a result, it is removed from the container opening 90 together with the upper lid 5. After removing the composite container lid 1 from the container opening 90 in this way, the container content liquid in which the mixture is mixed can be taken out by tilting the container.

After taking out the liquid in the container mixed with the mixture as described above, the composite container lid 1 is attached to the container opening 90 again and used for resealing, if necessary.
The container mouth 90 is mounted by covering the container mouth 90 with the lower lid 3 in which the upper lid 5 is held in a pressed state, and the upper lid 5 (the positioning piece 31 is inserted into the deep groove 41 and stably held). Is rotated in the closing direction. That is, with the rotation of the upper lid 5 in the closing direction, the lower lid 3 also rotates in the closing direction, and a screw between the thread 91 on the outer surface of the container opening 90 and the thread 11 on the lower lid 3 (lower cylindrical wall 7a). As a result of the engagement, the composite container lid 1 (lower lid 3) is screwed into the container mouth portion 90 and is again held by the container mouth portion 90 in the state of FIG.

  Note that when the upper lid 5 is rotated in the opening direction with the upper lid 5 being pushed in, this rotation is transmitted to the lower lid 3 stably and quickly to reduce the opening torque, for example, FIG. As shown in C), it is desirable that at least a part of the plurality of positioning pieces 31 is provided with a guide piece 31a protruding radially inward at a side end portion on the plug opening direction side. In this example, guide pieces 31 a are provided on two positioning pieces 31 out of four positioning pieces 31.

  By the way, as described above, since the seal film 25 is fused to the lower end of the circumferential ring 23 by heat sealing, the circumferential end portion of the film 25 has a circumferential shape as shown in FIG. The ring 23 protrudes from the lower outer surface. This protruding portion is indicated by 25a. Moreover, in the protruding portion 25a, the resin melt forming the circumferential ring 23 flows outward due to the pressure at the time of heat sealing, and is cooled and solidified in this state. It is hard and this reduces the sealing performance.

That is, when the upper lid 5 is pushed in with the lower lid 3 mounted on the container opening 90, the seal film 25 is broken by the cutter 17, as shown in FIG. Remains in the fused state at the lower end of the circumferential ring 23. In this state where the seal film 25 is broken, the outer surface of the circumferential ring 23 is in close contact with the inner surface of the upper position of the seal ring 15 rising from the annular flange 9 of the lower lid 3, thereby ensuring sealing performance. However, when the protruding portion 25a hardened as described above is present, the protruding portion 25a comes into contact with the base portion of the inner surface of the seal ring 15 so as to push the seal ring 15 outward. Act on. As a result, the adhesion between the outer surface of the circumferential ring 23 and the inner surface at the upper position of the seal ring 15 is lowered, a small gap is formed, and the sealing performance is greatly lowered.
However, in the present invention, such contact between the protruding portion 25a of the seal film 25 and the seal ring 15 can be effectively avoided, and deterioration of the sealing performance can be prevented.

With reference to the partially enlarged view of FIG. 6, in the present invention, the convex portion 50 for restricting the film end is provided on the upper surface of the annular flange 9 at a position on the inner side of the base portion of the seal ring 15 at an interval. Is provided. The convex portion 50 has a substantially triangular shape and has an inclined surface that regulates the circumferential end portion (protruding portion 25a) of the sheet film 25 protruding from the lower end portion of the circumferential ring.
That is, at the protruding portion 25a of the seal film 25, a resin solidified layer 51 is formed on the upper surface of the molten resin that has flowed and solidified. As a result, the protruding portion 25a is very hard. On the other hand, when the upper lid 5 is pushed in and the seal film 25 is broken by the cutter 17, the circumferential end of the seal film 25 is pressed against the upper surface of the annular flange 9 by the lowering of the circumferential ring 23 (upper lid 5). It has become a state. In such a state, in the present invention, the protruding portion 25a is urged obliquely upward by the inclined surface of the convex portion 50. As a result, the contact between the protruding portion 25a and the inner surface of the seal ring 15 is prevented. Avoided. Therefore, the sticking between the inner surface of the upper position of the seal ring 15 and the outer surface of the circumferential ring 23 is not hindered by such a protruding portion 25a, and good sealing performance can be ensured.

  In the present invention, the projection 50 for regulating the film end portion is formed by urging the protruding portion 25a of the seal film 25 in the state in which the upper cover 5 is pushed in, so that the protruding portion 25a and the seal ring 15 are urged upward. Since it is provided to prevent contact, as long as such contact is prevented, the protrusions 50 may be provided in an arc-shaped manner with an appropriate interval. In general, since the protruding portion 25a exists over the entire periphery of the lower end of the circumferential ring 23, it is preferable that the convex portion 50 is also formed in an annular shape that is completely continuous in the circumferential shape. is there.

  Further, in the present invention, the means for preventing the contact between the protruding portion 25a and the seal ring 15 is not limited to the convex portion 50 as described above. For example, as shown in FIG. It is also possible to adopt means for forming a circumferentially formed recess 53 on the upper surface of the annular flange 9 so as to face the lower end of the circumferential ring 23. That is, as can be understood from FIG. 6, by forming such a concave portion 53, the protruding portion 25a of the seal film 25 in a state where the upper lid 5 is pushed in can be urged upward. Contact between the portion 25a and the seal ring 15 can be prevented, and the sealing performance can be improved. The recessed part 53 of this invention has the inclined surface which controls the circumferential edge part (protrusion part 25a) of the sheet film 25 which protruded from the lower end part of the circumferential ring.

  As described above, in the present invention, the protruding portion 50 or the recessed portion 53 for restricting the film end portion is provided on the upper surface of the annular flange 9 so that the protruding portion 25a of the seal film 25 in the state in which the upper lid 5 is pushed is attached upward. However, as shown in FIG. 1, the lower end 23a of the circumferential ring 23 is made thin, and in particular, the outer surface of the lower end is notched. It is preferable to adopt the form. By making the shape of the lower end of the circumferential ring 23 in this way, the upward biasing of the protruding portion 25a becomes more prominent, and the thick portion other than the inner surface at the upper position of the seal ring 15 and the lower end of the circumferential ring 23 Adhesion with the outer surface of 23b is not hindered, and good sealability can be ensured. Further, in the present invention, on the upper surface of the annular flange 9, the film edge regulating convex part 50 or the concave part 53 is arranged at a position inward from the base part of the seal ring 15, so that It becomes possible to reliably prevent outward deformation of the seal ring 15.

The lower lid 3 and the upper lid 5 of the mixing composite container lid 1 of the present invention described above, except for the seal film 25, are all thermoplastic resins such as low-, medium-, or high-density polyethylene, linear low-density polyethylene, Random or block co-polymerization between α-olefins such as isotactic polypropylene, syndiotactic polypropylene, poly 1-butene, poly 4-methyl-1-pentene or ethylene, propylene, 1-butene, 4-methyl-1-pentene Compression molding using polymer, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic ester copolymer, ion-crosslinked olefin copolymer (ionomer), etc. Or injection molding.
Further, the seal film 25 may be in the form of, for example, a seal part made of aluminum foil or a composite seal part of a film and aluminum foil.

  Such a mixing composite container lid 1 is appropriately used in a container containing various content liquids used by adding a mixture, for example, various beverages and medicines, and stored in a state in which such a mixture is contained. Or, it is sold and used in exchange for a normal cap mounted on the container. In particular, the sealing property when mixing the admixture is good, and it is suitably applied to repeated resealing.

1: Mixing container lid for mixing 3: Lower lid 5: Upper lid 7: Cylindrical wall 7a: Lower cylindrical wall 7b: Upper cylindrical wall 9: Annular flange 10: Opening 11: Screw 15: Seal ring 17: Cutter 20 : Ceiling wall 21: Circumferential side wall 23: Circumferential ring 25: Sealing film 27: Mixed material storage chamber 31: Positioning piece 35: First locking protrusion 37: Second locking protrusion 39: Shallow groove 41: Deep groove 43: Temporary locking small protrusion 45: Upper lid locking protrusion 90: Container opening 91: Screw

Claims (4)

A lower lid attached to the container mouth, and an upper lid that contains a mixture mixed with the content liquid contained in the container and is fitted and fixed so as to be able to be pushed in over the lower lid In the composite container lid for mixing consisting of
The lower lid includes a cylindrical wall provided with an engagement portion with the container mouth portion on the inner surface, and an annular flange extending inward from the inner surface of the cylindrical wall at a position above the engagement portion. A cutter extending axially upward, and a seal ring extending axially upward from the upper surface of the annular flange so as to surround the cutter,
The upper lid includes a ceiling wall and a circumferential side wall descending from a circumferential end of the ceiling wall, and a circumferential ring descending at an interval from the circumferential side wall on the inner surface of the ceiling wall Have
A mixture storage chamber is formed by the circumferential ring, and the mixture is confined in the storage chamber at a lower end portion of the circumferential ring in a state where the mixture is stored in the storage chamber. In addition, the sealing film is fixed by heat fusion,
In an initial state where the upper lid is fitted and fixed over the lower lid, the cutter is in a non-contact position with the seal film. A seal structure is formed by adhesion between the inner surface of the seal ring and the outer surface of the circumferential ring, thereby forming a mixable state in which the mixed material can be dropped into the container and mixed with the content liquid,
On the upper surface of the annular flange, a convex portion or a concave portion for regulating the film end is formed at a position on the inner side of the base portion of the seal ring ,
The convex portion or the concave portion is formed with an inclined surface that regulates the circumferential end portion of the seal film that protrudes from the lower end portion of the circumferential ring,
The composite container lid for mixing , wherein the inclined end surface biases the circumferential end portion of the sealing film protruding from the lower end portion of the circumferential ring obliquely upward . The composite container lid for mixing according to claim 1 , wherein the convex portion or the concave portion is formed to be spaced inward from the seal ring.   The composite container lid for mixing according to claim 1, wherein the convex portion has an annular shape or a plurality of arc shapes.   The composite container lid for mixing according to claim 1, wherein the concave portion has an annular shape.