JP7797091B2 - Hinge cap - Google Patents

Description

The present invention relates to a hinge cap that is attached to a container and used, and in particular to a hinge cap that has an opening portion that breaks a thin, weakened portion and moves toward the top lid when the lid is first opened.

Conventionally, in hinge caps consisting of a cap body that is attached to a container and a top lid that is connected to the cap body via a hinge, a removal section formed by a pull ring or the like has been provided at the intended opening portion of the partition wall of the cap body to ensure the sealing of the container.
However, in order to open the removal section, it is necessary to open the top lid and then pull up a pull ring or the like to remove the removal section, which is time-consuming and can be difficult for users with weak strength to remove the bottle.

Therefore, if the removable portion intended for the opening were eliminated, problems would arise with sealing, such as the contents easily entering the hinge cap. Therefore, a hinge cap has been known in the past that omits the pull ring and instead engages a lift-up wall erected in the intended opening portion with a hanging piece hanging from the top lid, so that when the top lid is opened, the lift-up wall is pulled up, breaking the thin-walled weakened portion and opening the cap (see, for example, Patent Document 1).

In addition, with the hinge cap described in Patent Document 1, the top lid is molded in an open state, so it is necessary to close the lid using the hinge as a fulcrum and engage the lift-up wall with the hanging piece. In this process, the hanging piece partially abuts the lift-up wall from an oblique angle, placing a localized load on the weakened thin section, which may cause the weakened thin section to break. Therefore, it is known to separate the lid section, consisting of the top lid connected to the bottom wall by the hinge, from the base section with the separation piece, so that an even load is applied to the weakened thin section when the separation piece is hooked onto the tubular wall of the top lid, preventing the weakened thin section from breaking (see, for example, Patent Document 2).

Japanese Patent Application Publication No. 10-338253 JP 2015-34012 A

However, with the hinge cap described in Patent Document 1, when the top cover is lifted to open the cap, the entire circumference of the lift-up wall erected at the intended opening portion is pulled up, which poses the problem of requiring a large force to initiate fracture of the thin-walled weakened portion. Furthermore, with the hinge cap described in Patent Document 2, in addition to the same problems as with the hinge cap described in Patent Document 1, there is also the problem that, because a large force is applied when opening the cap, the separation piece and the cylindrical wall of the top cover must be firmly maintained in engagement.

The present invention aims to solve the above problems by providing a hinge cap that, when the top lid of the hinge cap is lifted, concentrates stress on the side of the thin-walled weakened portion opposite the hinge, thereby encouraging the thin-walled weakened portion to begin to break, and then allowing the breakage of the thin-walled weakened portion to progress, allowing the opening portion to move from the cap body side to the top lid side, making it easy to open.

In order to solve the above-mentioned problems, the present invention provides a hinge cap comprising a cap body attached to a container and an upper lid connected to the cap body via a hinge, wherein the cap body comprises an attachment part attached to the mouth of the container and a pouring part connected to the inside of the attachment part, the pouring part comprises a pouring tube erected inside the attachment part, a partition wall connected to the inner periphery of the pouring tube, an opening part defined by a breakable thin-walled weakened part in the partition wall and serving as a planned opening part, and a lift-up wall erected on the opposite side of the hinge of the opening part, the lift-up wall being semi-cylindrical, The container has an arc portion erected along the outer edge of the opener portion opposite the hinge, and a flat portion erected on the hinge side of the arc portion, the arc portion having a support pillar and an engagement window portion opened between the support pillar and the flat portion, the flat portion having a reinforcing rib formed from the upper end on the hinge side toward the upper surface of the hinge side of the opener portion, the upper lid having a top wall and an engagement wall hanging from the underside of the top wall and capable of engaging on the side opposite the hinge of the lift-up wall when the lid is closed, and the engagement wall has an engagement protrusion that engages with the engagement window portion from the inside of the lift-up wall, sandwiching the support pillar, when the lid is closed, and pulls up the support pillar .

In one embodiment of the hinge cap, the engaging projections are a pair of hooks formed facing outward so as to sandwich the support post .
The hinge cap is also a hinge cap consisting of a cap body attached to a container and an upper lid connected to the cap body via a hinge, wherein the cap body has an attachment part attached to the mouth of the container and a pouring part connected to the inside of the attachment part, and the pouring part has a pouring tube erected inside the attachment part, a partition wall connected to the inner periphery of the pouring tube, an opening part defined by a breakable thin-walled weakened part in the partition wall and serving as a planned opening part, and a lift-up wall erected on the opposite side of the hinge of the opening part, the lift-up wall being cylindrical. The container has a first support pillar formed on the opposite side of the hinge, a second support pillar formed on the hinge side, and an engagement window portion opened between the first support pillar and the second support pillar, the second support pillar has a reinforcing rib formed from the upper end on the hinge side toward the upper surface of the hinge side of the opening portion, the upper cover has a top wall and an engagement wall hanging down from the underside of the top wall and capable of engaging on the opposite side of the hinge of the lift-up wall when the cover is closed, and the engagement wall has an engagement protrusion that engages with the engagement window portion across the first support pillar from the inside of the lift-up wall when the cover is closed, and pulls up the support pillar .

Specific embodiments of the opener include a plug connected to the inner periphery of the lifting wall via a reversible thin film, and the plug is inserted into the engagement wall when the top lid is closed; the plug has a bottom connected to the lifting wall via the thin film and a tubular portion erected from the bottom and inserted into the engagement wall; the plug has a tubular portion connected to the lifting wall via the thin film and a fitting portion formed around the outer periphery of the tubular portion, and the engagement wall has a fitted portion formed on the inner periphery that fits into the fitting portion of the tubular portion; the top wall has a fitting hole that communicates with the inner surface of the engagement wall; and the plug has a top wall that closes the tip of the tubular portion and a locking protrusion formed at the tip of the tubular portion that fits into the fitting hole of the top lid.

The hinge cap of the present invention employs the above-described configuration, so that when the top cover is lifted during opening, the engaging wall pulls up the side of the lift-up wall of the opening portion opposite the hinge, concentrating stress on the side of the weakened thin-walled portion opposite the hinge, which triggers the initiation of fracture of the weakened thin-walled portion of the opening portion and continues to cause fracture of the weakened thin-walled portion, thereby not requiring a large force to open the cap. In particular, the provision of a reinforcing rib extending from the upper end of the lift-up wall on the hinge side toward the upper surface of the hinge side of the opening portion suppresses deformation of the lift-up wall relative to the upper surface of the opening portion on the hinge side, allowing stress to be concentrated near the weakened thin-walled portion on the side of the lift-up wall opposite the hinge.
In addition, the hinge cap of the present invention can ensure engagement between the lifting wall of the opener portion and the engaging protrusion formed on the engaging wall by inserting the plug body, which is connected to the inner periphery of the lifting wall of the opener portion via a reversible thin film portion, into the engaging wall.
Furthermore, in the hinge cap of the present invention, the locking protrusion of the stopper engages with the mating hole in the top lid, so that the stopper is pulled upward together with the top lid, and a pulling force is applied to the opening portion via the thin film portion, allowing the opening portion to be reliably moved from the cap body side to the top lid side.

1A and 1B are diagrams showing a state in which the hinge cap of Example 1 is attached to a container, in which (a) is a side cross-sectional view, and (b) is a cross-sectional view taken along line X1-X1 in (a). 1A and 1B are diagrams showing the hinge cap of Example 1 in an open state, in which FIG. 1A is a top view and FIG. 1B is a side cross-sectional view. 1A and 1B are diagrams showing the engagement state between the lifting wall and the engagement wall of the hinge cap of Example 1, where (a) is a side view before setting, (b) is a front/rear view of (a), (c) is a side view after setting, (d) is a front/rear view of (c), and (e) is a cross-sectional arrow view along line Y1-Y1 of (d). 1A and 1B are diagrams showing the stress distribution state when the hinge cap of Example 1 is opened, where FIG. 1A is a stress distribution diagram when there is no reinforcing rib, and FIG. 1B is a stress distribution diagram when there is a reinforcing rib. 10A and 10B are diagrams showing a state in which the hinge cap of Example 2 is attached to a container, in which (a) is a side cross-sectional view, and (b) is a cross-sectional view taken along line X2-X2 in (a). 10A and 10B are diagrams showing the hinge cap of Example 2 in an open state, in which FIG. 10A is a top view and FIG. 10B is a side cross-sectional view. 10A and 10B are diagrams showing the engagement state between the lifting wall and the engagement wall of the hinge cap of Example 2, where (a) is a side view after setting, (b) is a front/rear view of (a), and (c) is a cross-sectional arrow view along line Y2-Y2 of (b). 10A and 10B are diagrams showing the hinge cap of Example 3 in an open state, in which FIG. 10A is a top view and FIG. 10B is a side cross-sectional view. 10A and 10B are diagrams showing the hinge cap of Example 3 in a closed state, in which FIG. 10A is a side cross-sectional view before the plug is pushed in, and FIG. 10B is a side cross-sectional view after the plug has been pushed in. FIG. 10A and 10B are diagrams showing the hinge cap of Example 4 in an open state, in which FIG. 10A is a top view and FIG. 10B is a side cross-sectional view. 10A and 10B are diagrams showing the hinge cap of Example 5 in an open state, in which FIG. 10A is a top view and FIG. 10B is a side cross-sectional view. 10A and 10B are diagrams showing the hinge cap of Example 6 in an open state, in which FIG. 10A is a top view and FIG. 10B is a side cross-sectional view. 10A and 10B are diagrams showing the hinge cap of Example 6 in a closed state, in which FIG. 10A is a side cross-sectional view before the plug is pushed in, and FIG. 10B is a side cross-sectional view after the plug has been pushed in.

A hinge cap according to an embodiment of the present invention will be described with reference to the drawings showing examples.
In the following description, in FIG. 1, the left side is the "pouring side (opposite the hinge)", the right side is the "rear side (hinge side)", the top side is the "upper side", and the bottom side is the "lower side".

In FIG. 1, A is a container filled with the liquid content, B is a cap body attached to the container A, C is a hinge, and D is an upper lid attached to the cap body B via the hinge C so as to be able to open and close.
As shown in FIG. 1, a container A has a mouth 1 at the top, and an annular fitting ridge 2 is provided on the outer periphery of the mouth 1.

As shown in FIGS. 1 and 2, the cap body B includes an attachment portion 10 that is attached to the mouth portion 1 of the container A, and a spout portion 30 that is connected to the inside of the attachment portion 10 .
The attachment part 10 comprises an outer tube 12 whose inner periphery fits with the outer periphery of the mouth part 1, a ring-shaped base wall 13 connected to the inner periphery of the upper end of the outer tube 12 and having the pouring part 30 connected to its inner edge, and an inner tube 14 suspended from the underside of the inner edge of the base wall 13 and whose outer periphery fits with the inner periphery of the mouth part 1.

An engaging protrusion 15 is provided on the lower inner periphery of the outer tube 12, and when the mouth portion 1 of the container A is fitted into the attachment portion 10, the engaging protrusion 15 overcomes the fitting protrusion 2 and fits in, preventing the attachment portion 10 from coming off the mouth portion 1.
A ring-shaped lid engaging portion 16 for engaging the upper lid D is provided on the upper portion of the base wall 13, and an outwardly projecting engaging ridge 17 is provided on the upper portion of the lid engaging portion 16.

The mounting portion 10 is provided with a separating mechanism 20 for separating and discarding the hinge cap from the container A after use.
As the separation mechanism 20, near either the left or right side of the hinge C of the outer tube 12, as shown in Figure 2, a peripheral notch 21 that is approximately V-shaped in plan view is cut from above into the outer surface, leaving a thin bottom wall 22 at the lower end.
At a position corresponding to the outer circumferential notch 21 of the engaging protrusion 15, an inner circumferential notch is cut in the vertical direction, forming a vertical tear line, although this is not shown.

On the hinge C side of the outer peripheral cutout portion 21, a slit groove 24 is recessed from above so as to extend circumferentially from a position separated by a thin portion at the top of the inner peripheral side of the end face 23 as its starting point. In this embodiment, the slit groove 24 extends over approximately 345° from the end face 23 as its starting point, and at the end of this is provided a terminal connecting portion 25 where the outer tube 12 where the slit groove 24 does not exist and the lid engaging portion 16 are integrally connected.
In addition, the starting point of the slit groove 24 adjacent to the vertical tear line is used as the tearing starting point, and a thin-walled connecting portion 27 that connects the outer tube 12 and the lid engaging portion 16 is provided on the inner side of the bottom surface 26 of the slit groove 24, so that the circumferential tear line is formed to extend in an arc shape, and can be torn up to the unbreakable terminal connecting portion 25 at the end point.

The spout portion 30 comprises a spout tube 31 erected inside the mounting portion 10 (base wall 13), and a partition wall 32 connected to the lower inner periphery of the spout tube 31 and sealing the opening of the container A.
The partition wall 32 is formed with an opening portion 34 which is defined by a breakable thin-walled weakened portion 33 and which forms a pouring outlet which communicates with the interior of the container A by being cut out from the partition wall 32 .

The opening portion 34 comprises a bottom wall 35 connected to the partition wall 32 via a thin-walled weakened portion 33, and a semi-cylindrical pull-up wall 36 erected along the outer edge of the bottom wall 35 on the pouring side (opposite the hinge C), and the pull-up wall 36 is composed of an arc portion 36a on the pouring side and a flat portion 36b formed lower than the arc portion 36a on the back side (hinge side).
The arcuate portion 36a and the flat portion 36b may be formed to have the same height.
The arcuate portion 36a is composed of a support post 37 formed in the center of the pouring side and an engagement window portion 38 formed by opening a part between the support post 37 and the flat plate portion 36b excluding the flat plate portion 36b.
Furthermore, the pull-up wall 36 is provided with reinforcing ribs 39 extending from the rear surface of the flat plate portion 36b toward the upper surface of the bottom wall 35 and perpendicular to each other.
In this embodiment, the number of reinforcing ribs 39 provided on the back surface side of the flat plate portion 36b is one, but the number of reinforcing ribs 39 may be one or more as required.
The reinforcing rib 39 may have any shape as long as it connects the flat plate portion 36b and the bottom wall 35 together.

As shown in Figures 1 and 2, the top cover D is rotatably attached to the upper outer end of the outer tube 12 of the cap body B via a hinge C, and is provided with a top wall 40 covering the upper surface of the cap body B and a side wall 41 extending downward from the peripheral edge of the top wall 40.
An arc-shaped engagement wall 42 and a sealing tube 43 hang down from the underside of the top wall 40, and when the lid is closed, the tip of the engagement wall 42 is inserted inside the pull-up wall 36 of the opening portion 34, and the outer periphery of the sealing tube 43 is in close contact with the inner periphery of the dispensing tube 31 of the cap body B.

The engaging wall 42 has a pair of engaging protrusions 44 on the pouring side of the outer circumferential tip, and the engaging protrusions 44 have an R-shaped lower end and a hook-shaped tip that faces outward.As shown in Figure 3, when the engaging wall 42 is set on the cap body B in the closed state, the engaging protrusions 44 engage with the engaging window portion 38 so that they sandwich the support 37 from the inside of the lifting wall 36.
As a result, when the lid is first opened, the pouring side of the opening portion 34 is lifted together with the top lid D, breaking the thin-walled weakened portion 33 and allowing the opening portion 34 to move to the top lid D.
It is sufficient that at least one engaging projection 44 and one engaging window 38 are provided.

The inner periphery of the lower end of the side peripheral wall 41 is formed with an engaging protrusion 45 that engages with the inner periphery of the lid engaging portion 16 of the cap body B, and a locking recess 46 with an engaging protrusion provided below that locks with the outer periphery of the lid engaging portion 16, and the engaging protrusion 45 may be formed around the entire circumference or at intervals.
A finger hook 47 having a circular arc shape is provided on the outer periphery of the lower end of the side peripheral wall 41 on the pouring side.

In addition, to prevent unauthorized opening before use, the hinged cap of this embodiment has a shrink label or sealing member (not shown) between the cap body B and the top lid D.

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment is manufactured as a single unit by injection molding. The hinge cap manufactured as a single unit is obtained in an open state as shown in Figure 2, and the top cover D is rotated via the hinge C to set it in the closed state shown in Figure 1.

When the lid is closed, the lower end of the sealing tube 43 of the upper lid D contacts the upper part of the dispensing tube 31, and as shown in Figure 3, the lower end of the engaging protrusion 44 of the engaging wall 42 contacts the upper part of the arc portion 36a of the lifting wall 36, but further load is applied from above, causing the engaging protrusion 44 to engage with the engaging window portion 38 so as to sandwich the support 37. At this time, it is preferable to provide a press on the underside of the bottom wall 35 to prevent the opening portion 34 from moving downward and breaking the thin-walled weakened portion 33.
Although the lower end of the engaging projection 44 is rounded, it may have any shape as long as it does not interfere with engagement with the lifting wall 36 .

The sealing tube 43 is in close contact with the dispensing tube 31 to form a seal.
Furthermore, the lid engaging portion 16 of the cap body B is fitted into the locking recess 46 of the top lid D, and the hinge cap of this embodiment is in a closed state.

Next, the closed hinge cap is attached to the mouth 1 of the container A filled with the liquid content.
At this time, the lower outer periphery of the inner tube 14 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 tube 12 and the outer periphery of the mouth portion 1 engage, and the attachment portion 10 clamps the mouth portion 1 and is attached.
In this embodiment, the attachment portion 10 is configured to clamp the mouth portion 1 of the container A between the outer periphery of the inner tube 14 and the inner periphery of the outer tube 12, but it may also be configured to be screwed together by forming a male thread on the outer periphery of the mouth portion 1 of the container A and a female thread on the inner periphery of the outer tube 12.

When using the hinged cap of this embodiment for the first time, the top cover D is opened to break the thin-walled weakened portion 33 between the partition wall 32 and the opening portion 34 inside the dispensing tube 31 of the cap body B, thereby allowing the cap to be opened.

First, when the finger is hooked on the finger hook 47 of the top lid D from the state shown in FIG. 1 and the finger hook 47 is lifted, the engagement between the locking recess 46 of the top lid D and the lid engaging portion 16 of the cap body B is released from the pouring side.
Then, since the engaging protrusion 44 of the engaging wall 42 engages with the engaging window portion 38 of the lifting wall 36 of the opening portion 34, as the upper cover D is lifted, the support 37 of the lifting wall 36 is pulled up, and as shear stress is concentrated in the thin-walled weakened portion 33 near the support 37, the opening portion 34 begins to break from the thin-walled weakened portion 33 near the support 37.
Therefore, if the thin-walled weakened portion 33 is formed thinner on the pouring side than on the back side, it becomes easier to create an opportunity for the breakage to begin. Also, if the tip of the opening portion 34 on the opposite side from the hinge C is made into a protruding curved shape, it becomes easier to break.

Here, when we look at how stress acts on the stopper opening portion 34 when the pull-up wall 36 is pulled up by the engaging protrusion 44 of the engaging wall 42, as shown in Figure 4(a), if the reinforcing rib 39 is not provided, the stress acting on the stopper opening portion 34 when the pull-up wall 36 is pulled up (the black part in the figure) acts not only as stress α1 near the thin-walled weakened portion 33 between the arc portion 36a and the dispensing tube 31, but also as stress β1 near the lower end of the flat portion 36b, and the stress that should be concentrated on the thin-walled weakened portion 33 near the dispensing side of the pull-up wall 36 is dispersed, which may make it difficult for the thin-walled weakened portion 33 to break.
In contrast, as shown in Figure 4(b), when a reinforcing rib 39 is provided between the flat plate portion 36b and the upper surface of the opening portion 34, deformation of the flat plate portion 36b relative to the opening portion 34 (bottom wall 35) is suppressed, stress α2 is concentrated near the thin-walled weakened portion 33 between the arc portion 36a and the dispensing tube 31, and the stress β2 acting on the reinforcing rib 39 side of the flat plate portion 36b is smaller than the stress β1 shown in Figure 4(a), so that stress is concentrated in the thin-walled weakened portion 33 near the dispensing side of the pull-up wall 36, and the thin-walled weakened portion 33 can easily start to break near the dispensing side of the pull-up wall 36.

Furthermore, when the top lid D is lifted, the lifting wall 36 of the opening portion 34 is lifted up along with the top lid D, causing the fracture of the thin-walled weakened portion 33 to progress to the back side, and the opening portion 34 is held by the engaging wall 42 of the top lid D.
At the same time, the sealing tube 43 is lifted up and placed in an open state, and the portion of the opening 34 in the dispensing tube 31 becomes an opening, allowing the liquid content in the container A to be dispensed.

As explained above, when opening the hinge cap of this embodiment, as the top lid D begins to be lifted, the engaging protrusion 44 of the engaging wall 42 pulls up the support post 37 on the dispensing side of the opening portion 34, triggering the thin-walled weakened portion 33 on the dispensing side of the opening portion 34 to begin to break. Subsequently, as the top lid D continues to be lifted, the breakage of the thin-walled weakened portion 33 can be advanced toward the hinge C, so no great force is required when opening the cap.

Furthermore, after using the contents, the top lid D can be reattached to the cap body B, forming a seal between the seal tube 43 of the top lid D and the dispensing tube 31 of the cap body B, resealing the inside of the container A. This allows the hinged cap top lid D to be opened and closed repeatedly for use.

The hinge cap of this embodiment is provided with the separation mechanism 20, so that the liquid content in the container A can be separated and discarded from the container A after it has been used up completely.
In this case, the hinge cap is opened, and the top cover D is grasped with the fingers and pulled outward, whereby the portion of the outer tube 12 connected to the hinge C is pulled and deformed, causing a vertical tear line to break along the outer peripheral notch 21, and when the top cover D is pulled further, the connecting portion 27 forming the circumferential tear line begins to break.

As the fracture of the connecting portion 27 progresses, the top cover D separates from the cap body B.
Thereafter, the connecting portion 27 is cut up to the end of the slit groove 24, and when the top lid D is pulled further, the terminal connecting portion 25, which is integrally connected to the lid engagement portion 16 and the outer tube 12, is pulled outward, the engagement between the cap body B and the container A is released, and the hinge cap and the container A can be disposed of separately.

Next, a second embodiment in which the configuration of the spout portion 30 of the first embodiment is modified will be described with reference to FIGS.
In the following, the same components as those in the first embodiment are given the same reference numerals, and new reference numerals are given to changed parts in the spout section, and the explanation will be centered on the differences.

In FIG. 5, Ba denotes a cap body, and Da denotes an upper cover attached to the cap body Ba via a hinge C so as to be able to open and close.
The cap body Ba includes an attachment portion 10 that is attached to the mouth portion 1 of the container A, and a spout portion 50 that is connected to the inside of the attachment portion 10 .

The spouting part 50 includes a spouting tube 31 erected inside the mounting part 10 and a partition wall 32 connected to the lower inner periphery of the spouting tube 31 and sealing the opening of the container A.
The partition wall 32 is formed with an opening portion 51 which is defined by a breakable thin-walled weakened portion 33 and which forms a pouring outlet which communicates with the interior of the container A by being cut out from the partition wall 32 .

The opening portion 51 includes a bottom wall 52 connected to the partition wall 32 via a thin-walled weakened portion 33, and a cylindrical pull-up wall 53 erected along the outer edge of the bottom wall 52 on the pouring side.
The pull-up wall 53 comprises a first support pillar 54a formed in the center of the pouring side, a second support pillar 54b formed in the center of the back side, and an engagement window portion 55 formed by partially opening between the first support pillar 54a and the second support pillar 54b, and the pull-up wall 53 is formed so that the first support pillar 54a on the pouring side is higher than the second support pillar 54b on the back side.
The first support column 54a and the second support column 54b may be formed to have the same height.
Furthermore, the opening portion 51 is provided with reinforcing ribs 56 formed at right angles to each other from the center of the rear side of the lifting wall 53 toward the upper surface of the bottom wall 52 .
In this embodiment, the thickness of the reinforcing rib 56 provided at the center of the rear side of the lift-up wall 53 is set to be thinner than the width of the second support column 54 b, but the thickness of the reinforcing rib 56 can be set to be equal to or smaller than the width of the second support column 54 b. Note that the reinforcing rib 56 may have any shape as long as it connects the lift-up wall 53 and the bottom wall 52.

As shown in Figures 5 and 6, the upper cover Da is rotatably attached to the upper outer end of the outer tube 12 of the cap body Ba via a hinge C, and has a top wall 40 covering the upper surface of the cap body Ba and a side wall 41 hanging down from the peripheral edge of the top wall 40.
A cylindrical engagement wall 58 and a sealing tube 43 are suspended from the underside of the top wall 40, and when the lid is closed, the tip of the engagement wall 58 is inserted inside the lifting wall 53 of the opening portion 51, and the outer periphery of the sealing tube 43 is adapted to fit closely against the inner periphery of the dispensing tube 31 of the cap body Ba.
In this embodiment, a first rib 48 and a second rib 49 are respectively vertically extending from the top wall 40 to the first support pillar 54a and the second support pillar 54b of the lifting wall 53 on the outer peripheral pouring side and the outer peripheral back side of the engagement wall 58.

The engagement wall 58 has a pair of engagement protrusions 59 on the pouring side of the outer tip, and the engagement protrusions 59 have an R-shaped lower end and a hook-shaped tip facing outward.As shown in Figure 7, when the cap is set on the cap body Ba in the closed state, the engagement wall 58 engages with the engagement window portion 55 so that the engagement protrusions 59 sandwich the first support 54a from the inside of the lifting wall 53.
As a result, when the lid is first opened, the dispensing side of the opening portion 51 is lifted together with the top lid Da, breaking the thin-walled weakened portion 33, and the opening portion 51 moves to the top lid Da. Note that it is sufficient to provide at least one engaging protrusion 59 and one engaging window portion 55.

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment, like the first embodiment, is obtained by integral molding in the open state shown in Figure 6, and the top cover Da is rotated via the hinge C to be set in the closed state shown in Figure 5.

When the lid is closed, the lower end of the sealing tube 43 of the upper lid Da abuts against the top of the dispensing tube 31, and as shown in Figure 7, the lower end of the engagement protrusion 59 of the engagement wall 58 abuts against the top of the lifting wall 53, but further load is applied from above, causing the engagement protrusion 59 to engage with the engagement window portion 55 so as to sandwich the first support pillar 54a.
In this embodiment, the first rib 48 and the second rib 49 are respectively vertically attached to the front and back outer peripheral sides of the engaging wall 58, extending from the top wall 40 toward the first support pillar 54a and the second support pillar 54b of the lifting wall 53, so that the tip of the engaging wall 58 does not push the opening portion 51 and break the thin-walled weakened portion 33.

Next, the closed hinge cap is attached to the mouth 1 of the container A filled with the liquid content.
In this embodiment, the first rib 48 and the second rib 49 are respectively vertically extended from the top wall 40 toward the first support pillar 54a and the second support pillar 54b of the lifting wall 53, so that even if the upper lid Da is pushed down, the tip of the engaging wall 58 will not push the opening portion 51 and break the thin-walled weakened portion 33.
When using the hinge cap of this embodiment for the first time, the top lid Da can be opened to break the thin-walled weakened portion 33 between the partition 32 inside the dispensing tube 31 of the cap body Ba and the opening portion 51, thereby opening the cap.

First, when the upper lid Da is lifted from the state shown in Figure 5, the engagement protrusion 59 of the engagement wall 58 engages with the engagement window portion 55 of the pull-up wall 53 of the opening portion 51, so that as the upper lid Da is lifted, the first support pillar 54a of the pull-up wall 53 is pulled up, and as shear stress is concentrated in the thin-walled weakened portion 33 near the first support pillar 54a, the opening portion 51 begins to break from the thin-walled weakened portion 33 near the first support pillar 54a.
The tip of the opening part 51 on the side opposite to the hinge C may be formed into a curved protruding shape to make it easier to break.

As in the first embodiment, the reinforcing rib 56 provided in the opening portion 51 prevents the pull-up wall 53 from deforming relative to the bottom wall 52 of the second support pillar 54b when the pull-up wall 53 is pulled up by the engaging protrusion 59 of the engaging wall 58. This allows stress to be concentrated in the thin-walled weakened portion 33 near the first support pillar 54a, allowing the thin-walled weakened portion 33 to easily begin to break near the dispensing side of the pull-up wall 53.

Furthermore, when the top lid Da is lifted, the lifting wall 53 of the opening portion 51 is lifted along with the top lid Da, causing the fracture of the thin-walled weakened portion 33 to progress to the rear side, and the opening portion 51 is held by the engagement wall 58 of the top lid Da.

Next, a third embodiment in which the configuration of the outlet portion 50 of the second embodiment is modified will be described with reference to FIGS. 8 and 9. FIG.
In the following, the same components as those in the second embodiment are given the same reference numerals, and new reference numerals are given to changed parts in the spout section, and the explanation will be centered on the differences.

In FIG. 8, Bb denotes a cap body, and Db denotes an upper cover attached to the cap body Bb via a hinge C so as to be able to open and close.
The cap body Bb includes an attachment portion 10 that is attached to the mouth of a container (not shown), and a spout portion 60 that is connected to the inside of the attachment portion 10 .

The spout portion 60 includes a spout tube 31 erected inside the mounting portion 10 and a partition wall 32 connected to the lower inner periphery of the spout tube 31 .
The partition wall 32 is formed with an opening portion 61 defined by a breakable thin-walled weakened portion 33 and cut away from the partition wall 32 to form a spout communicating with the interior of the container.

The opening portion 61 comprises a bottom wall 62 connected to the partition wall 32 via a thin-walled weakened portion 33, a cylindrical pull-up wall 53 erected along the outer edge of the bottom wall 62 on the pouring side, and a stopper body 64 connected to the lower inner edge of the bottom wall 62 via a thin film portion 63 that can be inverted.
In this embodiment, the thin film portion 63 has a tapered cross section, but any structure may be used as long as it is reversible. For example, the cross section may be bellows-shaped, stepped, U-shaped, or the like.
Furthermore, it is preferable that the thickness of the thin weakened portion 33 and the thin film portion 63 be equal to or thicker than that of the thin weakened portion 33 .

The pull-up wall 53 comprises a first support pillar 54a formed in the center of the pouring side, a second support pillar 54b formed in the center of the back side, and an engagement window portion 55 formed by partially opening between the first support pillar 54a and the second support pillar 54b, and the pull-up wall 53 is formed so that the first support pillar 54a on the pouring side is higher than the second support pillar 54b on the back side.
The first support column 54a and the second support column 54b may be formed to have the same height.
Furthermore, the opening portion 61 is provided with reinforcing ribs 56 formed at right angles to each other from the center of the rear side of the lifting wall 53 toward the upper surface of the bottom wall 62 .

The plug 64 has a disk-shaped bottom 65 and a cylindrical portion 67 that stands upright from the peripheral edge of the bottom 65 and has an insertion guide portion 66 that is tapered and reduced in diameter at the outer circumferential tip.
When the upper lid Db is closed and set against the cap body Bb, the stopper body 64 is inserted into the inner circumference of the engagement wall 58 described later by inserting the cylindrical portion 67 through the insertion guide portion 66 and inverting the thin film portion 63.

The upper lid Db has a top wall 40 covering the upper surface of the cap body Bb, and a cylindrical engagement wall 58 and a sealing tube 43 hanging down from the underside of the top wall 40, the tip of which is inserted inside the lifting wall 53 of the opening portion 61 when the lid is closed, and the outer periphery of the sealing tube 43 is in close contact with the inner periphery of the dispensing tube 31 of the cap body Bb.
In this embodiment, a first rib 48 and a second rib 49 are respectively vertically extending from the top wall 40 to the first support pillar 54a and the second support pillar 54b of the lifting wall 53 on the outer peripheral pouring side and the outer peripheral back side of the engagement wall 58.

The engagement wall 58 has a pair of engagement protrusions 59 on the pouring side of the outer tip, and the engagement protrusions 59 have an R-shaped lower end and a hook-shaped tip facing outward.When the cap is set on the cap body Bb in the closed state, the engagement wall 58 engages with the engagement window portion 55 on the upper inner circumference so that the engagement protrusions 59 sandwich the first support 54a of the lifting wall 53.
As shown in FIG. 9B, a third rib 68 is provided on the inside of the engaging wall 58 to prevent the plug 64 from being inserted too far into the engaging wall 58.

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment, like the second embodiment, is obtained by integral molding in the open state shown in Figure 8, and the top cover Db is rotated via the hinge C to be set in the closed state shown in Figure 9(a).

After the hinge cap is set in the closed position, the plug 64 is inserted upward from the bottom 65 of the plug 64 using a tool or the like, and as shown in Figure 9(b), the thin film portion 63 is inverted and the tubular portion 67 is inserted into the engagement wall 58 via the insertion guide portion 66. The outer periphery of the tubular portion 67 of the plug 64 pushes open the lower inner periphery of the engagement wall 58, eliminating the gap that previously existed between the inner periphery of the lifting wall 53 and the outer periphery of the engagement wall 58, allowing the engagement protrusion 59 of the engagement wall 58 to deeply engage with the engagement window portion 55 of the lifting wall 53.

In the hinge cap of this embodiment, an insertion guide portion 66 having a tapered outer tip end is formed on the tubular portion 67 of the plug body 64, so that the plug body 64 can be inserted into the engagement wall 58 without any difficulty.
At this time, the third rib 68 of the top cover Db abuts against the cylindrical portion 67 of the plug 64, thereby functioning as a stopper to prevent the plug 64 from being inserted too far.
This ensures reliable engagement between the lifting wall 53 of the cap opening portion 61 and the engaging projection 59 formed on the engaging wall 58 of the top cover Db.

Next, a fourth embodiment in which the configuration of the outlet portion 50 of the second embodiment is modified will be described with reference to FIG.
In the following, the same components as those in the second embodiment are given the same reference numerals, and new reference numerals are given to changed parts in the spout section, and the explanation will be centered on the differences.

In FIG. 10, Bc denotes a cap body, and Da denotes an upper cover attached to the cap body Bc via a hinge C so as to be able to open and close.
The cap body Bc includes an attachment portion 10 that is attached to the mouth of a container (not shown), and a spout portion 70 that is connected to the inside of the attachment portion 10 .

The spouting part 70 includes a spouting tube 31 erected inside the mounting part 10 and a partition wall 71 connected to the lower inner periphery of the spouting tube 31 .
The partition wall 71 is formed with an opening portion 73 which is defined by a breakable thin-walled weakened portion 72 and which is cut out from the partition wall 71 to form a pouring outlet which communicates with the inside of the container.
In this embodiment, the partition 71 is inclined downward from the inner back surface side of the dispensing tube 31 toward the dispensing side so that the dispensing side end of the opening portion 73, i.e., the dispensing side end forming the thin-walled weakened portion 72, is the lowest end.

The plug opening portion 73 includes a bottom wall 74 connected to the partition wall 71 via a thin weakened portion 72, and a cylindrical pull-up wall 75 erected along the outer edge of the bottom wall 74 on the pouring side.
In this embodiment, the bottom wall 74 of the cap opening portion 73 is formed along the partition wall 71 so as to slope downward from the inner circumferential back surface side of the dispensing tube 31 towards the dispensing side.

The pull-up wall 75 comprises a first support pillar 76a formed in the center of the pouring side, a second support pillar 76b formed in the center of the back side, and an engagement window portion 77 formed by opening between the first support pillar 76a and the second support pillar 76b, and the pull-up wall 75 is formed so that the first support pillar 76a on the pouring side is higher than the second support pillar 76b on the back side.
The first support pillar 76a and the second support pillar 76b may be formed to have the same height.
Furthermore, the opening portion 73 is provided with reinforcing ribs 78 formed at right angles to each other from the center of the rear side of the lifting wall 75 toward the upper surface of the bottom wall 74 .

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment, like the second embodiment, is obtained by integral molding in the open state shown in FIG. 10, and the top cover Da is rotated via the hinge C to be set in the closed state.

When using a container equipped with the hinged cap of this embodiment for the first time, the top lid Da can be opened to break the thin-walled weakened portion 72 between the partition wall 71 and the opening portion 73 inside the dispensing tube 31 of the cap body Bc, thereby opening the container.

When the top lid Da is first lifted, the engagement protrusion 59 of the engagement wall 58 engages with the engagement window 77 of the lifting wall 75 of the opener 73. As the top lid Da is lifted, the first support pillar 76a of the lifting wall 75 is also lifted. As a result, shear stress is concentrated in the thin-walled weakened portion 72 near the first support pillar 76a, causing the opener 73 to begin to break from the thin-walled weakened portion 72 near the first support pillar 76a. At this time, because the bottom wall 74 of the opener 73 is formed to slope downward from the inner back surface of the dispensing tube 31 toward the dispensing side along the partition wall 71, the upward force acting on the dispensing side of the bottom wall 74 can be effectively utilized.

Next, a fifth embodiment in which the configuration of the outlet portion 70 of the fourth embodiment is modified will be described with reference to FIG.
In the following, the same components as those in the fourth embodiment are given the same reference numerals, and new reference numerals are given to changed parts in the spout section, and the explanation will be centered on the differences.

In FIG. 11, Bd denotes a cap body, and Da denotes an upper cover attached to the cap body Bd via a hinge C so as to be able to open and close.
The cap body Bd includes an attachment portion 10 that is attached to the mouth of a container (not shown), and a spout portion 80 that is connected to the inside of the attachment portion 10 .

The spout portion 80 includes a spout tube 31 erected inside the mounting portion 10 and a partition wall 81 connected to the lower inner periphery of the spout tube 31 .
The partition wall 81 is formed with an opening portion 83 which is defined by a breakable thin-walled weakened portion 82 and which is cut out from the partition wall 81 to form a spout which communicates with the inside of the container.
In this embodiment, the partition 81 slopes downward from the middle of the inner circumference of the dispensing tube 31 toward the dispensing side so that the dispensing side end of the opening portion 83, i.e., the dispensing side end forming the thin-walled weakened portion 82, is the lowest end.

The plug opening portion 83 includes a bottom wall 84 connected to the partition wall 81 via a thin weakened portion 82, and a cylindrical pull-up wall 85 erected along the outer edge of the bottom wall 84 on the pouring side.
In this embodiment, the bottom wall 84 of the plug opening portion 83 is formed along the partition wall 81 so as to slope downward from the middle of the inner periphery of the pouring tube 31 towards the pouring side.

The pull-up wall 85 comprises a first support pillar 86a formed in the center of the pouring side, a second support pillar 86b formed in the center of the back side, and an engagement window portion 87 formed by opening between the first support pillar 86a and the second support pillar 86b, and the pull-up wall 85 is formed so that the first support pillar 86a on the pouring side is higher than the second support pillar 86b on the back side.
The first support pillar 86a and the second support pillar 86b may be formed to have the same height.
Furthermore, the opening portion 83 is provided with reinforcing ribs 88 formed at right angles to each other from the center of the rear side of the lifting wall 85 toward the upper surface of the bottom wall 84 .

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment, like the fourth embodiment, is obtained by integral molding in the open state shown in FIG. 11, and the top cover Da is rotated via the hinge C to be set in the closed state.

When using a container equipped with the hinged cap of this embodiment for the first time, the top lid Da can be opened to break the thin-walled weakened portion 82 between the partition wall 81 and the opening portion 83 inside the dispensing tube 31 of the cap body Bd, thereby opening the container.

When the top lid Da is first lifted, the engagement protrusion 59 of the engagement wall 58 engages with the engagement window 87 of the lifting wall 85 of the opener 83. As the top lid Da is lifted, the first support 86a of the lifting wall 85 is also lifted. As shear stress concentrates in the thin-walled weakened portion 82 near the first support 86a, the opener 83 begins to break from the thin-walled weakened portion 82 near the first support 86a. At this time, because the bottom wall 84 of the opener 83 is formed to slope downward from the middle of the inner circumference of the dispensing tube 31 toward the dispensing side along the partition 81, the upward force acting on the dispensing side of the bottom wall 84 can be effectively utilized.

Next, a third embodiment in which the configuration of the spout portion 60 of the third embodiment is modified will be described with reference to FIGS. 12 and 13. FIG.
In the following, the same components as those in the third embodiment are given the same reference numerals, and new reference numerals are given to changed parts in the spout section, and the explanation will be centered on the differences.

In FIG. 12, Be denotes a cap body, and Dc denotes an upper cover attached to the cap body Be via a hinge C so as to be able to open and close.
The cap body Be includes an attachment portion 10 that is attached to the mouth of a container (not shown), and a spout portion 90 that is connected to the inside of the attachment portion 10 .

The spouting part 90 includes a spouting tube 31 erected inside the mounting part 10 and a partition wall 32 connected to the lower inner periphery of the spouting tube 31 .
The partition wall 32 is formed with an opening portion 91 defined by a breakable thin-walled weakened portion 33 and cut away from the partition wall 32 to form a spout communicating with the interior of the container.

The plug opening portion 91 comprises a bottom wall 92 connected to the partition wall 32 via a thin-walled weakened portion 33, a cylindrical pull-up wall 93 erected along the outer edge of the bottom wall 92 on the pouring side, and a plug body 98 erected within the pull-up wall 93 via a thin film portion 97 that can be inverted from the lower inner edge of the bottom wall 92.
In this embodiment, the thin film portion 97 has a U-shaped cross section, but any structure may be used as long as it is an invertible shape. For example, the cross section may be bellows-shaped, stepped, tapered, or the like.
Furthermore, it is preferable that the thickness of the thin weakened portion 33 and the thin film portion 97 be equal to or thicker than that of the thin weakened portion 33 .

The pull-up wall 93 comprises a first support pillar 94a formed in the center of the pouring side, a second support pillar 94b formed in the center of the back side, and an engagement window portion 95 formed by partially opening between the first support pillar 94a and the second support pillar 94b, and the pull-up wall 93 is formed so that the first support pillar 94a on the pouring side is slightly higher than the second support pillar 94b on the back side.
The first support pillar 94a and the second support pillar 94b may be formed to have the same height.
Furthermore, the opening portion 91 is provided with reinforcing ribs 96 formed at right angles to each other from the center of the rear side of the lifting wall 93 toward the upper surface of the bottom wall 92 .

The plug 98 includes a cylindrical tube portion 99 whose lower end is connected to the thin film portion 97 , and a top wall 100 that closes the tip of the tube portion 99 .
The cylindrical portion 99 has a locking protrusion 102 with chamfered corners provided around the outer periphery of the tip thereof, and a fitting recess 101 serving as a fitting portion provided around the outer periphery directly below the locking protrusion 102 .
When the upper lid Dc is closed and set on the cap body Be, the stopper body 98 is designed so that the cylindrical portion 99 is inserted from the top wall 100 side into the engagement wall 107 described later, and the thin film portion 97 is inverted so that it fits into the fitting hole portion 106 opened in the top wall 105 of the upper lid Dc.

The top cover Dc includes a top wall 105 that covers the upper surface of the cap body Be, and a side peripheral wall 41 that hangs down from the peripheral edge of the top wall 105 .
A cylindrical engagement wall 107 and a sealing tube 43 are suspended from the underside of the top wall 105, and when the lid is closed, the tip of the engagement wall 107 is inserted inside the lifting wall 93 of the opening portion 91, and the outer periphery of the sealing tube 43 is in close contact with the inner periphery of the dispensing tube 31 of the cap body Be.
The top wall 105 has a fitting hole 106 that communicates with the inner peripheral surface of the engagement wall 107 and into which the locking projection 102 of the plug 98 fits when the lid is closed.

The engaging wall 107 has a pair of engaging protrusions 109 on the pouring side of the outer tip, and the engaging protrusions 109 have an R-shaped lower end and a hook-shaped tip facing outward.When the engaging wall 107 is set on the cap body Be in the closed state, both engaging protrusions 109 engage with the respective engaging window portions 95 so that they sandwich the first support 94a of the lifting wall 93.
The inner periphery of the engagement wall 107 is provided with a mating projection 108 that continues from the inner periphery of the mating hole 106 and serves as a mated portion formed to fit into the mating recess 101 of the plug 98 .
It does not matter whether the fitting recess 101 or the fitting protrusion 108 is concave or convex. It is also preferable that the diameter of the lower outer periphery of the tubular portion 99 of the plug 98 is equal to the diameter of the lower inner periphery of the engagement wall 107, or that the diameter of the plug 98 is slightly smaller.

Next, the manner of use and the effects of this embodiment will be described.
The hinge cap of this embodiment, like the third embodiment, is obtained by integral molding in the open state shown in Figure 12, and the top cover Dc is rotated via the hinge C to set it in the closed state shown in Figure 13(a).
At this time, the engaging protrusion 109 of the engaging wall 107 of the upper cover Dc engages with the engaging window portion 95 so as to sandwich the first support 94a of the lifting wall 93 of the cap body Be, and the stopper body 98 of the cap body Be is inserted so that the locking protrusion 102 of the tubular portion 99 is directly below the mating convex portion 108 formed on the inner circumference of the engaging wall 107 of the upper cover Dc.

After the hinge cap is set in the closed state, the stopper body 98 is pushed upward from the lower end of the tubular portion 99 of the stopper body 98 using a tool or the like, the thin film portion 97 is inverted, and as shown in Figure 13 (b), the locking protrusion 102 of the tubular portion 99 of the stopper body 98 overcomes the mating protrusion 108 on the inner circumference of the engagement wall 107 of the upper cover Dc, so that the mating recess 101 of the stopper body 98 and the mating protrusion 108 of the engagement wall 107 engage with each other, completing the setting of the engagement wall 107 of the upper cover Dc and the stopper body 98 of the cap body Be.
At this time, the upper surface of the top wall 100 of the plug 98 becomes flush with the upper surface of the top wall 105 of the upper cover Dc, and the tip of the plug 98 can close the fitting hole 106 of the upper cover Dc.
Furthermore, by inserting the cylindrical portion 99 of the plug 98 into the inner periphery of the engagement wall 107, radial deformation of the engagement wall 107 can be suppressed.

In the hinge cap of this embodiment, the top cover Dc and the cap body Be are connected by the engagement between the engagement protrusion 109 of the engagement wall 107 and the lifting wall 93, and the locking protrusion 102 of the stopper body 98 fits into the fitting hole 106 of the top cover Dc. This means that when the stopper is opened, the stopper body 98 is pulled upward along with the top cover Dc, and a pulling force is applied to the bottom wall 92 via the thin film portion 97, ensuring reliable opening of the opening portion 91.

When opening the hinge cap of the present invention, the top lid is lifted, concentrating stress on the side of the thin-walled weakened portion opposite the hinge, which encourages the initiation of fracture in the thin-walled weakened portion and allows the fracture to continue, making it easy to open. Because the opening portion is connected to the intended opening portion by the thin-walled weakened portion, the hinge cap has excellent sealing properties and can be used in a wide range of applications as a hinge cap for containers containing liquid contents that require airtightness.

A Container B, Ba, Bb, Bc, Bd, Be Cap body C Hinge D, Da, Db, Dc Top lid α1, α2 Stress near the arc portion β1, β2 Stress near the flat portion 1 Mouth portion 2 Fitting protrusion 10 Mounting portion 12 Outer cylinder 13 Base wall 14 Inner cylinder 15 Engaging protrusion 16 Lid engaging portion 17 Locking protrusion 20 Separation mechanism 21 Outer peripheral cut portion 22 Thin-walled bottom wall 23 End face 24 Slit groove 25 Terminal connecting portion 26 Bottom surface 27 Connecting portion 30, 50, 60, 70, 80, 90 Spouting portion 31 Spouting cylinder 32, 71, 81 Partition wall 33, 72, 82 Thin-walled weakened portion 34, 51, 61, 73, 83, 91 Opening portion 35, 52, 62, 74, 84, 92 Bottom wall 36, 53, 75, 85, 93 Pull-up wall 36a Arc portion 36b Flat plate portion 37 Support pillars 38, 55, 77, 87, 95 Engagement window portions 39, 56, 78, 88, 96 Reinforcing ribs 40, 105 Top wall 41 Side peripheral walls 42, 58, 107 Engagement wall 43 Seal tube 44, 59, 109 Engagement protrusions 45 Engagement convex portion 46 Locking recess 47 Finger hook portion 48 First rib 49 Second rib 54a, 76a, 86a, 94a First support pillars 54b, 76b, 86b, 94b Second support pillars 63, 97 Thin film portion 64, 98 Plug body 65 Bottom portion 66 Insertion guide portion 67, 99 Cylinder portion 68 Third rib 100 Top wall 101 Fitting recess (fitting portion)
102: Locking protrusion 106: Fitting hole 108: Fitting protrusion (fitted portion)

Claims (8)

A hinge cap comprising a cap body attached to a container and an upper lid connected to the cap body via a hinge,
The cap body includes an attachment portion that is attached to the mouth of the container, and a spout portion that is connected to the inside of the attachment portion.
The pouring portion includes a pouring tube provided upright inside the mounting portion, a partition wall provided continuous to the inner periphery of the pouring tube, an opening portion defined by a breakable thin-walled weakened portion in the partition wall and serving as a planned opening portion, and a lift-up wall provided upright on the opposite side of the hinge of the opening portion,
The lifting wall has a semi-cylindrical shape and includes an arc portion erected along the outer edge of the opening portion on the side opposite the hinge, and a flat portion erected on the hinge side of the arc portion,
The arc portion has a support and an engagement window portion that opens between the support and the flat plate portion,
the flat plate portion has a reinforcing rib formed from the upper end on the hinge side toward the upper surface on the hinge side of the opening portion,
The upper cover has a top wall and an engagement wall that hangs down from the underside of the top wall and can be engaged with the side opposite to the hinge of the lift-up wall when the cover is closed;
The hinge cap is characterized in that the engagement wall has an engagement protrusion that, when the lid is closed, engages with the engagement window portion while sandwiching the support post from the inside of the lifting wall, thereby lifting up the support post . 2. The hinge cap according to claim 1, wherein the engaging projections are a pair of hooks formed facing outward so as to sandwich the support post . A hinge cap comprising a cap body attached to a container and an upper lid connected to the cap body via a hinge,
The cap body includes an attachment portion that is attached to the mouth of the container, and a spout portion that is connected to the inside of the attachment portion.
The pouring portion includes a pouring tube provided upright inside the mounting portion, a partition wall provided continuous to the inner periphery of the pouring tube, an opening portion defined by a breakable thin-walled weakened portion in the partition wall and serving as a planned opening portion, and a lift-up wall provided upright on the opposite side of the hinge of the opening portion,
The lifting wall is cylindrical and has a first support pillar formed on the opposite side to the hinge, a second support pillar formed on the hinge side, and an engagement window portion opened between the first support pillar and the second support pillar,
the second support has a reinforcing rib formed from the upper end on the hinge side toward the upper surface on the hinge side of the opening portion,
The upper cover has a top wall and an engagement wall that hangs down from the underside of the top wall and can be engaged with the side opposite to the hinge of the lift-up wall when the cover is closed;
The engaging wall has an engaging protrusion that, when the hinge cap is closed, engages with the engaging window portion from the inside of the lifting wall, sandwiching the first support post therebetween, and pulls up the support post . 4. The hinge cap according to claim 3 , wherein the engaging projections are a pair of hooks formed facing outward so as to sandwich the support post . the opening portion has a plug body connected to the inner periphery of the lifting wall via an invertible thin film portion,
5. The hinge cap according to claim 3 , wherein the plug is inserted into the engagement wall with the top cover closed . 6. The hinge cap according to claim 5 , wherein the plug has a bottom portion connected to the lifting wall via a thin film portion, and a tubular portion extending from the bottom portion and inserted into the engaging wall . The plug has a cylindrical portion connected to the lift-up wall via a thin film portion, and a fitting portion provided around the outer periphery of the cylindrical portion,
6. The hinge cap according to claim 5 , wherein the engaging wall has a fitted portion formed on an inner periphery thereof, the fitted portion being fitted with the fitting portion of the cylindrical portion. the upper cover has a fitting hole in a top wall thereof that communicates with an inner circumferential surface of the engagement wall;
8. The hinge cap according to claim 7 , wherein the plug has a top wall that closes the tip of the cylindrical portion, and a locking protrusion formed at the tip of the cylindrical portion that fits into a fitting hole in the top cover .