JP7254415B2 - hinge cap - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge cap that is attached to the mouth of a container, and more particularly to a hinge cap that has a transition portion that breaks a weakened portion and transitions to a lid when the lid is first opened.

Conventionally, in a hinge cap comprising a cap body attached to a container and a lid body connected to the cap body via a hinge, in order to ensure the sealability of the container, the opening planned portion of the partition wall of the cap body A removal section with a pull ring or the like was provided.
However, in order to open the removal part, it is necessary to remove the removal part by pulling the pull ring after opening the lid, which is troublesome and difficult for users with weak strength. I had a problem.

Therefore, if the removal portion, which is the planned opening portion, is removed, the contents liquid will easily enter the hinge cap and other sealing problems will occur. (for example, See Patent Document 1).

In addition, in the hinge cap described in Patent Document 1, since the lid body is molded in an open state, it is necessary to close the lid with the hinge as a fulcrum and engage the engagement wall with the hanging piece. The piece is partially abutted against the engagement wall from an oblique direction, and a local load is applied to the weakened portion, which may cause the weakened portion to break. By separating the lid part composed of the lid body and the base part having the separation piece, when the separation piece is hooked to the cylindrical wall of the lid body, the weakened part is evenly loaded and weakened. It is also known to prevent breakage of parts (see, for example, Patent Document 2).

JP-A-10-338253 JP 2015-34012 A

However, in the hinge cap described in Patent Document 2, there is a problem that the lid and the base must be molded separately. There is a problem that the engagement state between the separation piece and the cylinder wall of the lid must be firmly maintained at the time of unsealing by ensuring the engagement without applying an excessive load.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems. An object of the present invention is to provide a hinge cap capable of improving the fitting force between an engaging wall of a lid body and an engaging cylinder of a lid body.

In order to solve the above problems, the present invention provides a hinge cap comprising a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge, as a hinge cap, The cap body includes a pouring tube erected from a wall portion that seals the mouth of the container, and a transition portion connected to the pouring tube. a vertically extending engagement tube, a transition portion having an annular bottom wall connected to the dispensing tube via a breakable weakened portion; and a stopper connected from the annular bottom wall via a reversible membrane, the stopper comprising a bottom connected to the annular bottom wall via the membrane, and a bottom and a cylindrical portion that is inserted into the engaging cylinder, and the stopper has a thin film portion that is turned over while the lid is closed, and the cylindrical portion is inserted into the engaging cylinder. A configuration characterized by

As a specific embodiment of the hinge cap, the engagement wall has an engagement ridge formed on the inner circumference, and the engagement cylinder has an engagement projection formed on the outer circumference. Further, the cylindrical portion has a configuration characterized by having an insertion guide portion formed at the distal end portion, and a configuration characterized by having a diameter-reducing step portion formed on the outer circumference upper portion of the cylindrical portion, and A gap is formed in the fitting portion between the engaging protrusion of the engaging tube and the engaging ridge of the engaging wall when the lid is closed, and the plug body is formed with the thin film portion after the lid is closed. When the cylinder part is reversed and inserted into the engagement cylinder, the gap that had existed in the fitting part until then is eliminated, and the engagement projection of the engagement cylinder and the engagement ridge of the engagement wall are fitted together. A configuration is adopted.

As a further specific embodiment of the hinge cap, the engaging cylinder has a configuration characterized by having a diameter-enlarged thin-walled portion formed at the inner peripheral lower part, and the engaging cylinder is formed at the inner peripheral upper part. A construction characterized by having ribs for prevention is adopted .

The hinge cap of the present invention adopts the above-described configuration, so that when the hinge cap is set and the lid is closed, even if there is a gap between the fitting portion between the engagement wall of the transition portion and the engagement cylinder of the lid, Even if there is no gap, the stopper of the transitional portion reverses the thin film portion, inserts the cylindrical portion into the engaging cylinder of the lid body, and eliminates the gap in the fitting portion, so that the engaging wall of the transitional portion and the lid can be separated from each other. It is possible to prevent the engagement wall of the transition portion from falling off from the engagement tube of the lid when unsealing.
In addition, since the hinge cap of the present invention is provided with a weakened portion at the transition portion to be opened, it can be used for a hot-fillable container because it can ensure the same level of airtightness as when the cap is removed by a pull ring.

Fig. 2 is a side cross-sectional view showing a state in which the hinge cap of the first embodiment of the present invention is attached to the container; BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the open lid state of the hinge cap of 1st Example of this invention, (a) is a top view, (b) is side surface sectional drawing. FIG. 2 is an enlarged explanatory view of a main part of FIG. 1; FIG. 5 is an enlarged explanatory view of a main part of a hinge cap of a second embodiment of the invention; FIG. 10 is an enlarged explanatory view of a main part of a hinge cap according to a third embodiment of the present invention;

Hinge caps according to embodiments of the present invention will be described with reference to the drawings shown in Examples.
In the following description, referring to FIG. 1, the left direction is defined as "front", the right direction is defined as "back", the upward direction is defined as "up", and the downward direction is defined as "down".

In FIG. 1, A is a container, B is a cap body attached to the container A, C is a hinge, and D is a lid attached to the cap body B via the hinge C so as to be openable and closable.
The container A has a mouth portion 1 at the top, and a fitting ridge 2 is provided on the outer peripheral surface of the mouth portion 1 .

As shown in FIGS. 1 and 2, the cap main body B includes a mounting portion 10 mounted on the mouth portion 1 of the container A, and an inner edge upper end of the mounting portion 10 extending inward from the mouth portion 1 of the container A. and a pouring tube 12 erected from the base wall 11 .
In this embodiment, the pouring tube 12 is provided closer to the front side than the center.
In addition, a transition portion E is continuously provided in the pouring tube 12 via a weakened portion 13 as a portion to be opened.

The mounting portion 10 includes a ring-shaped lid engaging portion 16 which is provided with a locking ridge 15 on its peripheral edge and engages with the lid body D, and an inner cylinder 17 vertically provided from the inner peripheral side of the lid engaging portion 16 . , and an outer peripheral wall portion 18 extending vertically from the outer peripheral side of the lid engaging portion 16 .
The outer peripheral wall portion 18 is provided with an engaging protrusion 19 that engages with the fitting protrusion 2 of the container A at the inner peripheral lower portion.

As shown in FIG. 2, a substantially V-shaped outer circumferential notch 23 is formed on the outer circumferential surface near the left or right of the hinge C of the outer circumferential wall 18, leaving a thin bottom wall 24 at the lower end. is cut from
At a position corresponding to the outer peripheral cut portion 23 of the engaging protrusion 19, an inner peripheral cut portion (not shown) is cut in the vertical direction to form a vertical tear line.

On the hinge C side of the outer peripheral cut portion 23, a slit groove 25 is recessed from above so as to extend in the circumferential direction starting from a position across the upper thin portion on the inner peripheral side of the end face 23a. , extending over about 345° from the end surface 23a, and a terminal connecting portion 28 in which the outer peripheral wall portion 18 without the slit groove 25 and the lid engaging portion 16 are integrally connected is provided.
In addition, with the starting point of the slit groove 25 adjacent to the vertical tearing line as the starting point of tearing, a thin connection connecting the outer peripheral wall portion 18 and the lid engaging portion 16 is provided on the inner peripheral side of the bottom surface 26 of the slit groove 25. A portion 27 is provided to form a circumferential tear line extending in an arc so as to be tearable to an terminating non-breakable end joint 28 .

As shown in FIGS. 1 to 3, the transition portion E includes an annular bottom wall 30 connected to the lower inner periphery of the pouring tube 12 via the weakened portion 13, and an engagement portion erected from the inner edge of the annular bottom wall 30. The annular bottom wall 30 includes a joint wall 31 and a plug body 34 connected from the upper portion of the inner edge of the annular bottom wall 30 through a reversible thin film portion 33. A cut portion 35 is provided, and an engaging ridge 32 is provided on the upper inner circumference of the engaging wall 31 .
In this embodiment, the thin film portion 33 has a tapered cross section, but any structure can be used as long as it has a reversible shape. For example, the cross section may be accordion-shaped, step-shaped, or the like.
As for the thickness of the weakened portion 13 and the thin film portion 33 , it is preferable that the thin film portion 33 is equal to or thicker than the weakened portion 13 .

The stopper 34 has a disk-shaped bottom 36 and a tubular portion 37 which is erected from the peripheral edge of the bottom 36 and has an insertion guide portion 38 tapered in diameter at the distal end of the outer periphery. .
In this embodiment, the cylindrical portion 37 is hollow inside, but may be solid if necessary.
When the lid D is closed and set on the cap B, the stopper 34 pushes the cylindrical portion 37 from the insertion guide portion 38 and inverts the thin film portion 33, so that an engagement cylinder 42, which will be described later, is engaged. It is designed to be inserted into the inner periphery.

As shown in FIGS. 1 and 2, the lid D is rotatably attached to the outer peripheral upper end of the outer peripheral wall portion 18 of the cap body B via a hinge C, and covers the upper surface of the cap body B. It is provided with a top wall 40 and side peripheral walls 41 extending from the periphery of the top wall 40 .
The top wall 40 has an engaging tube 42 and a sealing tube 43 extending vertically from the lower surface of the engaging tube 42. The leading end of the engaging tube 42 is inserted into the engaging wall 31 of the transition portion E. , the engagement wall 31 and the fitting portion, and the outer periphery of the sealing cylinder 43 abuts the inner periphery of the pouring cylinder 12 of the cap body B so as to form a fitting portion.
Furthermore, a recessed groove 46 is formed around the outer side of the seal tube 43 on the lower surface of the top wall 40 .

Engagement projections 44 are provided at the bottom of the outer periphery of the engagement cylinder 42, and as shown in FIG. The engaging ridge 32 on the upper inner circumference of the engaging wall 31 is fitted, and the cylindrical portion 37 of the plug 34 is inserted into the inner circumference.
Thereby, when the lid is opened for the first time, the transition portion E is lifted together with the lid D, breaks the weakened portion 13, and transitions to the lid D.
In this embodiment, the engaging tube 42 is provided near the front side from the center, similarly to the pouring tube 12 .

In addition, the engagement position between the engagement projection 44 of the engagement cylinder 42 and the engagement rib 32 of the engagement wall 31 is provided at a position as far away from the top wall 40 of the lid body D as possible. When the hinge cap in the open state shown in FIG. A local load can be avoided, and breakage of the weakened portion 13 can be prevented.
In this embodiment, ribs 45 for reinforcement are provided on the inner peripheral upper portion of the engaging tube 42 so that the upper portion of the engaging tube 42 is not deformed. If so, the rib 45 may be omitted.

The lower end portion of the side peripheral wall 41 is provided with an engaging recess 47 on the inner peripheral side thereof to be fitted with the lid engaging portion 16 of the cap main body B. A locking projection 48 is provided around the lid for engaging with the locking projection 15 to keep the lid closed.
An arcuate finger hook portion 49 is provided in the circumferential direction on the outer periphery of the side peripheral wall 41 on the front side (the side opposite to the hinge C).

The hinge cap of this embodiment is provided with a shrink label, a sealing member, etc. between the cap main body B and the lid D, although not shown, in order to prevent tampering before use.

Next, the mode of use and effects of this embodiment will be described.
The hinge cap of this embodiment is integrally manufactured by injection molding using a mold.
For example, the top side of the transition section E is molded with a surrounding mold and a central mold, first released from the surrounding mold, then the central mold is released, at which time the transition section The engaging ridge 32 of the engaging wall 31 of E becomes an undercut and is pulled upward. Since the mold is formed in the inner part, the transition part E is prevented from being pulled upward, and the weakened part 13 can be prevented from being broken.

The hinge cap of this embodiment, which is manufactured by integral molding, is obtained in an open state as shown in FIG. set.
At that time, the lower end of the sealing tube 43 of the lid D hits the upper part of the pouring tube 12, and the lower part of the engaging projection 44 of the engaging tube 42 hits the upper part of the engaging ridge 32 of the engaging wall 31. Although they are in contact with each other, the engaging protrusion 44 and the engaging ridge 32 are engaged with each other under a load from above. At this time, it is preferable that the annular bottom wall 30 and the stopper 34 of the transition portion E are provided with a retainer so that the transition portion E moves downward and the weakened portion 13 does not break.

Also, the seal tube 43 forms a seal portion by coming into contact with the extraction tube 12 .
Further, the lid engaging portion 16 of the cap main body B is fitted with the engaging concave portion 47 of the lid D, and the hinge cap of this embodiment is closed.

After the hinge cap is in the closed state, the stopper 34 is pushed upward by a jig or the like from below the stopper 34 to invert the thin film portion 33 as shown by the two-dot chain line in FIG. 37 is inserted from the insertion guide portion 38 into the engaging tube 42 , the outer periphery of the cylindrical portion 37 of the plug 34 is fitted to the inner periphery of the engaging tube 42 . At this time, the rib 45 in the engagement tube 42 also functions as a stopper to prevent the plug 34 from being inserted too much.
Thereby, the fitting force of the fitting portion between the engaging wall 31 of the transition portion E and the engaging tube 42 of the lid D can be improved.

Next, the closed hinge cap is attached to the opening 1 of the container A filled with the content liquid by plugging.
At this time, the lower outer periphery of the inner cylinder 17 of the cap body B is inserted into the upper inner periphery of the mouth portion 1 of the container A, and the inner periphery of the outer peripheral wall portion 18 and the outer periphery of the mouth portion 1 are engaged, and the mounting portion 10 is attached. It is attached while holding the mouth part 1 therebetween.
In this embodiment, the mounting portion 10 sandwiches the mouth portion 1 of the container A between the outer periphery of the inner cylinder 17 and the inner periphery of the outer peripheral wall portion 18. However, the outer periphery of the mouth portion 1 of the container A A male thread may be formed in the outer peripheral wall portion 18 and a female thread may be formed in the inner periphery of the outer peripheral wall portion 18 for screwing.

In the hinge cap of this embodiment, a recessed groove 46 is provided around the outer side of the seal cylinder 43 on the lower surface of the top wall 40, and the deformation of the top wall 40 can be alleviated, so that the content liquid can be filled into the container A by heat. In this case, even if the air in the lid D thermally expands, the pressure change can be absorbed. In addition, it is possible to prevent the upper portion of the annular bottom wall 30 of the transition portion E from being pushed down by the engaging cylinder 42 and lowering the transition portion E when a pressing force is applied from above when the lid is closed. Breakage of the weakened portion 13 can be prevented.
Further, in the hinge cap of this embodiment, in addition to the normal locking by the lid engaging portion 16 of the cap body B and the locking projection 38 of the lid D, the engaging wall 31 and the engaging tube 42 are Due to the strong fit, even if the pressure inside the lid D increases, the lid D will not open due to the effect of the concave groove 46 .

When the hinge cap of the present invention is used for the first time, the lid D is opened to break the weakened portion 13 between the pouring tube 12 and the transition portion E of the cap body B to remove the plug. can be done.
First, when the finger hooking portion 49 of the lid body D is put on the finger hooking portion 49 and the finger hooking portion 49 is lifted, the fitting portion between the engaging projection 44 of the engaging cylinder 42 and the engaging projection 32 of the engaging wall 31 of the transition portion E is opened. is strongly fitted by inserting the plug 34, the transition portion E is lifted together with the lid D, thereby breaking the weakened portion 13, and the transition portion E transitions to the lid D as it is.
Further, by lifting the lid D, the seal cylinder 43 is lifted together with the engagement cylinder 42 to open the lid, and the transition part E in the pouring cylinder 12 becomes an opening, and the inside of the container A is opened. Content liquid can be poured out.

After the content liquid is used, the lid D is closed to the cap main body B again, so that the seal cylinder 43 of the lid D and the pouring cylinder 12 form a seal portion, and the inside of the container A is sealed again. can be used by opening and closing the lid D repeatedly.

The hinge cap of this embodiment can be separated from the container A and discarded after the content liquid in the container A is completely used.
In this case, when the hinge cap is opened and the lid body D is grasped with fingers and pulled outward, the portion of the outer peripheral wall portion 18 connected to the hinge C is pulled and deformed, and the outer peripheral cut portion 23 is pulled. , and when the lid D is further pulled, the connecting portion 27 forming the circumferential tear line begins to tear.

As the breakage of the connecting portion 27 progresses, the lid D separates from the cap main body B. As shown in FIG.
After that, when the cutting of the connecting portion 27 is completed up to the terminal end of the slit groove 25 and the lid body D is further pulled, the terminal connecting portion 28 integrally connected to the lid engaging portion 16 and the outer peripheral wall portion 18 is pulled outward. As a result, the fitting between the cap body B and the container A is released, and the hinge cap and the container A can be separately discarded.

Next, a second embodiment in which the configuration of the plug body 34 of the first embodiment is changed will be described with reference to FIG.
Hereinafter, the same reference numerals are given to the same constituent parts as in the first embodiment, and new reference numerals are given to the changed parts of the plug body 34, and the explanation will focus on the points of difference.

In FIG. 4, B is a cap body, D is a lid body attached to the cap body B via a hinge C (not shown) so as to be openable and closable, and Ea is a transition portion provided in a planned opening portion of the cap body B. be.

The transition portion Ea includes an annular bottom wall 30 connected to the lower inner circumference of the pouring tube 12 via the weakened portion 13, an engaging wall 31 erected from the inner edge of the annular bottom wall 30, and the annular bottom wall 30. The annular bottom wall 30 is provided with an undercut portion 35 whose diameter is expanded upward from the lower end of the inner edge to engage. An engagement ridge 32 is provided on the upper inner circumference of the wall 31 .

The plug body 51 has a disk-shaped bottom portion 52 and an insertion guide portion 54 formed upright from the peripheral edge portion of the bottom portion 52 , and an insertion guide portion 54 having a tapered diameter at the tip of the outer periphery. and a cylindrical portion 53 in which a diameter-reduced stepped portion 55 is formed.
When the lid D is closed and set on the cap main body B, the plug body 51 pushes the cylindrical portion 53 in order from the insertion guide portion 54 to the diameter-reduced stepped portion 55 , and reverses the thin film portion 33 . , so as to be inserted into the inner periphery of an engagement cylinder 42, which will be described later.

The lid body D has a top wall 40 covering the upper surface of the cap main body B, an engaging tube 42 extending from the lower surface of the top wall 40, and a sealing tube 43 extending vertically outside the engaging tube 42. The engaging tube 42 is The tip of the seal tube 43 is inserted into the engagement wall 31 of the transition portion Ea to form a fitting portion with the engagement wall 31. It abuts on the periphery.

Engagement projections 44 are provided at the bottom of the outer periphery of the engagement cylinder 42 , and when the engagement cylinder 42 is set on the cap main body B in the closed state, the engagement projections 44 are aligned with the inner periphery of the engagement wall 31 . 4, a gap s is formed between the engaging protrusion 44 and the engaging protrusion 32, and a plug body is formed on the inner circumference. A cylindrical portion 53 of 51 is inserted.
In addition, a rib 45 for reinforcement is provided on the inner peripheral upper portion of the engaging tube 42 so that the upper portion of the engaging tube 42 is not deformed.
Thus, when the lid is opened for the first time, the transition portion Ea is lifted together with the lid D, breaks the weakened portion 13, and transitions to the lid D.

Next, the mode of use and effects of this embodiment will be described.
The hinge cap of the present embodiment is obtained by integrally molding the lid in an open state in the same manner as in the first embodiment. The lid is set to the closed state shown.
In this embodiment, since there is a gap s between the engaging projection 44 of the engaging cylinder 42 and the engaging projection 32 of the engaging wall 31, it is possible to reduce the resistance when the cover is closed. Therefore, it is possible to prevent the weakened portion 13 from being broken unintentionally at the time of setting.
Also, the seal tube 43 forms a seal portion by coming into contact with the extraction tube 12 .

After the hinge cap is in the closed state, the plug 51 is pushed upward by a jig or the like from below the plug 51 to invert the thin film portion 33 as shown by the chain double-dashed line in FIG. 53 is inserted into the engagement tube 42 in order from the insertion guide portion 54 to the reduced diameter stepped portion 55, the outer periphery of the tube portion 53 of the plug body 51 spreads the inner peripheral lower portion of the engagement tube 42, and until then, the fitting portion is closed. It is possible to eliminate the gap s existing in the gap s and to fit the engaging projection 44 of the engaging tube 42 and the engaging ridge 32 of the engaging wall 31 .

In the hinge cap of the present embodiment, the cylindrical portion 53 has a diameter-reduced stepped portion 55 formed on the upper outer circumference continuous from the insertion guide portion 54. It can be inserted into the cylinder 42 without difficulty.
Thereby, the fitting force between the engaging wall 31 of the transition portion Ea and the engaging tube 42 of the lid D can be improved.
Other effects are the same as in the first embodiment.

Next, a third embodiment in which the configuration of the stopper 34 and the engaging tube 42 of the first embodiment is changed will be described with reference to FIG.
Hereinafter, the same reference numerals are given to the same constituent parts as in the first embodiment, and new reference numerals are given to the changed parts in the plug 34 and the engaging cylinder 42, and the explanation will focus on the points of difference.

In FIG. 5, B is a cap body, Da is a lid body attached to the cap body B via a hinge C (not shown) so as to be openable and closable, and Ea is a transition portion provided in a planned opening portion of the cap body B. be.

The transition portion Ea includes an annular bottom wall 30 connected to the lower inner circumference of the pouring tube 12 via the weakened portion 13, an engaging wall 31 erected from the inner edge of the annular bottom wall 30, and the annular bottom wall 30. The annular bottom wall 30 is provided with an undercut portion 35 whose diameter is expanded upward from the lower end of the inner edge to engage. An engagement ridge 32 is provided on the upper inner circumference of the wall 31 .

The plug body 51 has a disk-shaped bottom portion 52 and an insertion guide portion 54 formed upright from the peripheral edge portion of the bottom portion 52 , and an insertion guide portion 54 having a tapered diameter at the tip of the outer periphery. and a cylindrical portion 53 in which a diameter-reduced stepped portion 55 is formed.
When the cap body Da is closed and set on the cap main body B, the plug body 51 pushes the cylindrical portion 53 in order from the insertion guide portion 54 to the diameter-reduced step portion 55 , and reverses the thin film portion 33 . , so as to be inserted into the inner periphery of an engagement cylinder 61, which will be described later.

The lid Da has a top wall 40 covering the upper surface of the cap main body B, an engaging tube 61 extending from the lower surface of the top wall 40, and a sealing tube 43 hanging from the engaging tube 61. The tip of the sealing tube 43 is inserted into the engaging wall 31 of the transition portion Ea to form a fitting portion with the engaging wall 31. It abuts on the periphery.

The engaging tube 61 has an engaging projection 62 on the lower outer circumference and an enlarged diameter thin portion 64 on the lower inner circumference. When the engaging tube 61 is set on the cap main body B in the closed state, the engaging protrusion 62 forms a fitting portion with the engaging ridge 32 on the inner peripheral upper portion of the engaging wall 31 . 5, a gap s is formed between the engaging projection 62 and the engaging ridge 32, and the cylindrical portion 53 of the plug 51 is inserted into the inner circumference.
In addition, a rib 63 for reinforcement is provided on the inner peripheral upper portion of the engaging tube 61 so that the upper portion of the engaging tube 61 is not deformed.
Thus, when the lid is first opened, the transition portion Ea is lifted together with the lid Da, breaks the weakened portion 13, and transitions to the lid Da.

Next, the mode of use and effects of this embodiment will be described.
The hinge cap of the present embodiment is obtained by integrally molding the lid in an open state in the same manner as in the first embodiment. The lid is set to the closed state shown.
In this embodiment, as in the second embodiment, there is a gap s between the engaging projection 62 of the engaging cylinder 61 and the engaging ridge 32 of the engaging wall 31, so that the setting by closing the lid is possible. It is possible to reduce the resistance at the time and prevent the weakened portion 13 from being broken at the time of setting.
Also, the seal tube 43 forms a seal portion by coming into contact with the extraction tube 12 .

After the hinge cap is in the closed state, the stopper 51 is pushed upward by a jig or the like from below the stopper 51 to invert the thin film portion 33 as shown by the two-dot chain line in FIG. 53 is inserted into the engagement tube 61 in order from the insertion guide portion 54 to the diameter reduction step portion 55, the outer periphery of the tube portion 53 of the plug body 51 spreads the enlarged diameter thin portion 64 of the engagement tube 61, and is fitted until then. The gap s existing at the joining portion is eliminated, and the engaging projection 62 of the engaging tube 61 and the engaging ridge 32 of the engaging wall 31 can be fitted.

In the hinge cap of this embodiment, the cylindrical portion 53 has a diameter-reduced stepped portion 55 formed on the upper outer circumference continuous from the insertion guide portion 54, and an enlarged diameter thin portion 64 on the lower inner circumference of the engaging cylinder 61. Since it is formed, the plug 51 can be inserted into the engaging tube 61 without difficulty as compared with the second embodiment.
Thereby, the fitting force between the engaging wall 31 of the transition portion Ea and the engaging tube 61 of the lid Da can be improved.
Other effects are the same as in Examples 1 and 2.

In the hinge cap of the present invention, when the hinge cap is set and the lid is closed, even if there is a gap in the fitting portion between the engagement wall of the transition portion and the engagement cylinder of the lid body, the transition portion can be closed even if there is no clearance. is inserted into the engagement cylinder of the lid to eliminate the gap in the fitting portion, thereby improving the fitting force between the engagement wall of the transition portion and the engagement cylinder of the lid, and when unsealing, the lid It is possible to prevent the engagement wall of the transition part from falling off from the engagement cylinder of the body, and the weakened part is broken by opening the lid, so that the plug can be easily unplugged. , can be heat-filled, and can be widely applied as a hinge cap for a container containing a liquid that requires airtightness.

A Container B Cap body C Hinge D, Da Lid E, Ea Transition part s Gap 1 Mouth part 2 Fitting ridge 10 Mounting part 11 Base wall (wall part)
12 Dispensing tube 13 Weakened portion 15 Locking protrusion 16 Lid engaging portion 17 Inner tube 18 Outer peripheral wall portion 19 Engaging protrusion 23 Outer peripheral cut portion 23a End surface 24 Thin bottom wall 25 Slit groove 26 Bottom surface 27 Connecting portion 28 End connection Part 30 Annular bottom wall 31 Engagement wall 32 Engagement ridge 33 Thin film parts 34, 51 Plug body 35 Undercut parts 36, 52 Bottom parts 37, 53 Cylindrical parts 38, 54 Insertion guide part 40 Top wall 41 Side peripheral walls 42, 61 Engagement cylinder 43 Seal cylinders 44, 62 Engagement projections 45, 63 Rib 46 Groove 47 Engagement recess 48 Locking projection 49 Finger hooking part 55 Diameter reduction step 64 Diameter expansion thin part

Claims (7)

A hinge cap comprising a cap body attached to the mouth of a container and a lid body connected to the cap body via a hinge,
The cap body includes a pouring tube erected from a wall portion that seals the mouth of the container, and a transition portion connected to the pouring tube,
The lid has a top wall and an engagement tube vertically provided from the bottom surface of the top wall,
The transition portion includes an annular bottom wall connected to the dispensing tube via a breakable weakened portion, an engaging wall erected from the annular bottom wall and capable of forming a fitting portion with the engaging tube, and an annular bottom. and a plug connected to the wall via a reversible thin film,
The stopper has a bottom portion connected to the annular bottom wall via the thin film portion, and a cylindrical portion erected from the bottom portion and inserted into the engagement cylinder,
1. A hinge cap characterized in that the plug body is such that the thin film part is turned upside down while the lid body is closed, and the tube part is inserted into the engagement tube. The engagement wall has an engagement ridge formed on the inner circumference,
2. The hinge cap according to claim 1, wherein the engaging cylinder has engaging projections formed on the outer periphery thereof. 3. The hinge cap according to claim 1 or 2, wherein the cylindrical portion has an insertion guide portion formed at the tip. 4. The hinge cap according to any one of claims 1 to 3, wherein the tubular portion has a diameter-reduced stepped portion formed on the upper portion of the outer periphery. A gap is formed in the fitting portion between the engaging projection of the engaging tube and the engaging ridge of the engaging wall when the lid is closed ,
After the lid is closed, the thin film portion of the stopper is reversed and the cylindrical portion is inserted into the engaging cylinder to eliminate the gap that had existed in the fitting portion until then and engage with the engaging projection of the engaging cylinder. 5. The hinge cap according to claim 4 , wherein the engaging ridge of the joint wall is fitted . The hinge cap according to any one of claims 1 to 5, wherein the engaging cylinder has a diameter-enlarged thin-walled portion formed on the lower portion of the inner circumference. The hinge cap according to any one of claims 1 to 6, wherein the engaging tube has deformation-preventing ribs formed on the upper part of the inner periphery thereof.

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