JP7512179B2 - Hinge Cap - Google Patents

Description

The present invention relates to a hinge cap that is attached to a container body and used, and in particular to a hinge cap that has a transition plug that breaks a thin, weakened portion and transitions to the top lid when the lid is first opened.

Conventionally, in a hinge cap consisting of a cap body that is attached to a container body and a top lid that is connected to the cap body via a hinge, in order to ensure the airtightness of the container body, an opening portion for the spout has been formed in the partition of the cap body, which is defined by a breakable thin-walled weakened portion and is provided with a pull ring or the like as the intended opening portion for the spout.
However, in order to open the opening part, it is necessary to open the top lid and then pull up a pull ring or the like to remove the opening part, which is time-consuming and can be difficult for users with weak strength to open.

It is possible to eliminate the opening part and open the spout beforehand, but this would cause problems with the sealing of the container body, so a hinge cap has been known in which the pull ring is omitted and the transition plug as the opening part is joined to the top lid by ultrasonic bonding after molding, and the transition plug is pulled up as the top lid is opened, breaking the thin, weakened part, and opening is achieved (see, for example, Patent Document 1).

In addition, in the hinge cap described in Patent Document 1, since it is necessary to join the transition plug to the top lid by ultrasonic bonding or the like after molding, a hinge cap is also known in which a lifting part erected on the transition plug is engaged with an attachment part suspended from the top lid, and when the top lid is opened, the transition plug is pulled up together with the lifting part, thereby breaking the thin-walled weakened part and opening the cap (see, for example, Patent Document 2).

JP 2014-221643 A JP 2015-34012 A

However, with the hinge caps described in Patent Documents 1 and 2 above, if the container body containing the contents is tipped over when the lid is closed, or if the container body is shaken vigorously to stir the contents, the contents can adhere to the bottom surface of the transfer plug transferred to the top lid, and when the top lid is opened, the adhered contents can drip and soil the outside of the container.
Furthermore, when using the liquid contents, if the container is tilted with the top lid open, the liquid contents adhering to the bottom surface of the transfer plug transferred to the top lid will drip and not only soil the inside of the top lid, but if the lid is closed in that state, the cap body and the container itself will also become soiled.

The present invention aims to solve the above problems by providing a hinge cap equipped with a transfer plug that is moved to and held on the top lid when opened, in which even if the contents adhere to the bottom surface of the transfer plug, the contents adhering to the bottom surface of the transfer plug do not drip onto the outside of the sealed tube inside the top lid when the top lid is opened.

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 body and an upper lid connected to the cap body via a hinge, wherein the cap body comprises a partition wall that seals the mouth of the container body, a pouring tube erected on the partition wall, and a transfer plug having a flat bottom surface that is defined by a breakable thin-walled weakened portion in the partition wall inside the pouring tube and that is moved to and held by the upper lid when the lid is opened, and the upper lid comprises a sealing tube that is hung from the underside of the top wall and is in close contact with the inner periphery of the pouring tube to seal the inside, the height between the bottom surface and the lower end of the sealing tube being 0.2 mm to 3.5 mm , and the width between the tip of the thin-walled weakened portion on the hinge side and the inner periphery of the sealing tube being 2 mm to 5.5 mm.

As an embodiment of the hinge cap, a configuration is adopted in which the thin-walled weakened portion is characterized by connecting the inner upper end of the partition wall and the bottom surface of the transition plug, and the transition plug is provided with a retaining upright wall erected from the hinge side, and the upper cover is characterized by having a retaining receiving wall erected from the underside of the top wall and engaging or abutting with the retaining upright wall.

By adopting the above-mentioned configuration, the hinge cap of the present invention can prevent the content liquid adhering to the bottom surface of the transfer stopper from dripping onto the outside of the sealing tube in the top lid when the top lid is opened, even if the content liquid adheres to the bottom surface of the transfer stopper by shaking the container body before use to stir the content liquid.
In addition, the hinge cap of the present invention can reduce the height between the bottom surface of the transition plug and the lower end of the sealing cylinder by connecting the thin-walled weakened portion to the inner upper end of the partition and the bottom surface of the transition plug.

1A and 1B are diagrams showing a hinge cap according to an embodiment of the present invention attached to a container body before opening, in which FIG. 1A is a side cross-sectional view, and FIG. 1A and 1B are diagrams showing an open state of a hinge cap according to an embodiment of the present invention immediately after production, in which FIG. 1A and 1B are diagrams showing a modified example of a hinge cap according to an embodiment of the present invention, in which FIG. 1A is a side cross-sectional view, and FIG. 1A, 1B, and 1C are enlarged cross-sectional views showing the set dimensions of comparative experiments in an embodiment of the present invention, respectively, of the respective experimental examples after opening. 5 is a photograph showing the results of a comparative experiment for each setting corresponding to (a), (b), and (c) of FIG. 4 when the lid is open.

Next, the hinge cap of the present invention will be described with reference to the drawings in the following embodiments.
In the following description, when looking at FIG. 1(a), the left direction is referred to as the "front (opposite side from the hinge)", the right direction is referred to as the "rear (hinge side)", the upward direction is referred to as the "upper", and the downward direction is referred to as the "lower".

In FIG. 1, A denotes a cap body that is attached to a container body D, and B denotes an upper lid that connects the cap body A with a hinge C and opens and closes.
An engaging ridge 2 is provided on the outer periphery of the mouth 1 of the container body D.

As shown in Figures 1 and 2, the cap body A is composed of a partition wall 5 that seals the mouth 1 of the container body D, a pouring tube 6 that stands upright from the upper surface of the partition wall 5, and an attachment part 7 that is attached to the mouth 1 and has the partition wall 5 formed on the inside.

The partition 5 is provided with a transfer plug 10 defined by a breakable thin-walled weakened portion 8 on the inner peripheral side of the pouring tube 6 in order to open the pouring outlet when in use.
The transfer plug 10 is connected to the partition wall 5 via the thin-walled weakened portion 8 and is provided with a bottom wall 11 having a flat bottom surface 19, and a substantially cylindrical pull-up portion 12 is provided upright on the upper surface of the bottom wall 11 on the front side (opposite the hinge C), and a holding upright wall 13 is provided upright on the hinge C side along the inside of the thin-walled weakened portion 8. The upper surface of the bottom wall 11 is formed flat, but may be an inclined surface that slopes downward from the front side toward the hinge C side.
Furthermore, the bottom surface 19 of the bottom wall 11 does not need to be entirely flat, but it is sufficient that at least the surface on the hinge C side (approximately half of the hinge C side) is flat.

In this embodiment, as shown in FIG. 2, the front end 11a of the bottom wall 11 on the front side is sharply shaped so as to facilitate breaking of the thin-walled weakened portion 8, and the front side of the pull-up portion 12 is also sharply shaped.
In addition, the retaining vertical wall 13 is provided from the rear side to near the pull-up portion 12, but it is sufficient that the retaining vertical wall 13 is provided at least around the rear end portion 11b of the bottom wall 11 so as to suppress deformation (such as floating up) of the rear end portion 11b of the bottom wall 11.

Furthermore, a reinforcing rib 14 is provided on the hinge C side of the pull-up portion 12 from its upper portion toward the upper surface of the bottom wall 11 .
The shape of the reinforcing rib 14 may be any shape capable of reinforcing the hinge C side of the pull-up portion 12, and may be a triangular shape with the bottom wall 11 side being wider.

In this embodiment, a mountain-shaped locking protrusion 16 is provided on the upper surface of the pull-up portion 12 via a step portion 15 so as to cover the pull-up portion 12 .
The locking projection 16 has a mountain shape that is thicker at the bottom and thinner toward the top.
The upper surface of the locking projection 16 is flat in this embodiment, but may be rounded.
Further, the pull-up portion 12 has a recess 17 formed in the lower surface thereof, making it hollow, but it may be solid.
Furthermore, the bottom wall 11 has a peripheral wall 18 formed around the entire circumference of the thin-walled weakened portion 8 on the outer periphery side of the retaining vertical wall 13, and the peripheral wall 18 has a bank-like shape that is lower than the height of the retaining vertical wall 13.

The mounting portion 7 is suspended from the outer peripheral edge of the partition 5 and comprises an inner tube 20 whose outer circumference is inserted into the inner circumference of the mouth 1 of the container body D, an outer tube 21 whose inner circumference engages with the outer circumference of the mouth 1, and a ring-shaped lid engagement portion 22 connected at the upper ends of the inner tube 20 and outer tube 21, and a bulge 23 that protrudes outward is provided at the upper part of the lid engagement portion 22.
An engaging protrusion 24 is provided on the inner periphery of the outer cylinder 21 to engage with an engaging protrusion 2 provided on the outer periphery of the mouth portion 1 .

As shown in FIG. 2, an outer peripheral cutout 25 having a generally V-shape in plan view is cut from above into the outer peripheral surface near either the left or right side of the hinge C of the outer tube 21, and a slit groove 26 is recessed from above so as to extend over a predetermined range in the circumferential direction on the hinge C side, starting from a position separated by a thin-walled portion at the upper part on the inner peripheral side of the outer peripheral cutout 25.
Therefore, when the top lid B is pulled down via the hinge C when the hinge cap is disposed of, the outer peripheral cut portion 25 forms a vertical tear line and the slit groove 26 forms a circumferential tear line, and the outer tube 21 is broken circumferentially starting from the outer peripheral cut portion 25, and the engagement between the engaging protrusion 24 of the broken portion and the mouth 1 of the container body D is gradually released, allowing the hinge cap to be easily pulled away from the container body D and separated for disposal.

As shown in Figures 1 and 2, the top cover B is rotatably attached to the outer periphery of the outer tube 21 of the cap body A via a hinge C, and has a flat top wall 30 and a side wall 31 depending from the periphery of the top wall 30.
The top wall 30 has a sealing tube 32 and a retaining receiving wall 34 vertically extending from the underside thereof on the hinge C side inside the sealing tube 32, the sealing tube 32 being arranged so that its outer periphery is in close contact with the inner periphery of the pouring tube 6 of the cap body A, and the retaining receiving wall 34 being arranged so that its inner periphery tip engages or abuts with the outer periphery upper end of the retaining vertical wall 13 of the transfer plug 10.

In this embodiment, the inner circumference of the retaining receiving wall 34 engages with or abuts the outer circumference of the retaining vertical wall 13, but the outer circumference of the retaining receiving wall 34 may also engage with or abut the inner circumference of the retaining vertical wall 13, and the tip surface of the retaining receiving wall 34 may also engage with or abut the upper end surface of the retaining vertical wall 13.
The receiving wall 34 is vertically installed at least in the range where the standing wall 13 is installed.
In addition, the retaining receiving wall 34 has an abutment rib 35 formed at the center of the hinge C side of its inner circumference, and the abutment rib 35 is arranged so as to come close to or abut against the upper end of the retaining vertical wall 13 when the inner circumference of the retaining receiving wall 34 engages or abuts against the outer periphery of the retaining vertical wall 13 of the transition plug 10.

Furthermore, an engagement hole 36 is opened on the front side of the top wall 30 inside the sealing tube 32, and a step is provided at the lower part of the engagement hole 36 to provide an engagement portion 33 that engages with the locking protrusion 16 on the upper part of the lifting portion 12.
As shown in Figure 2 (b), the inner surface of the engagement portion 33 is inclined to match the lower outer surface of the engagement protrusion 16, and the lower surface 33a is configured to abut or come into close proximity with the step portion 15 of the pull-up portion 12 when the lid is closed.
Further, a locking projection 37 is provided on the upper surface of the step of the engagement hole 36 .

In this embodiment, as shown in FIG. 1, when the lid is closed, the upper part of the locking protrusion 16 protrudes through the locking hole 36, and the upper part of the locking protrusion 16 is expanded so as to fill the locking hole 36 by a non-removal process such as melting or ultrasonic bonding, and the locking protrusion 16 is engaged by the locking projection 37 on the upper surface of the engagement portion 33.
In this embodiment, an engagement protrusion 16 is provided above the pull-up portion 12, and an engagement hole 36 is opened in the top lid B. When the lid is closed after molding, the upper part of the engagement protrusion 16 is engaged with the engagement portion 33 by anti-slip processing. However, depending on the method for engaging the pull-up portion 12 of the transition plug 10 with the engagement portion 33 of the top lid B, it is not necessary to open the engagement hole 36 in the top lid B. For example, an engagement protrusion can be provided on the underside of the top lid B and an engagement hole can be provided in the pull-up portion 12 to connect them, or a recess can be provided in the pull-up portion 12 that bulges out below the transition plug 10 to connect the engagement protrusion. Alternatively, the pull-up portion 12 can be omitted and an engagement hole can be provided in the bottom wall 11 of the transition plug 10 to connect it to the engagement protrusion. Furthermore, an insert member made of a separate material may be used, for example, by inserting the insert member through the engagement hole portion 36 and connecting it to the transition plug 10 (pull-up portion 12); in short, any method is acceptable as long as it can firmly connect the transition plug 10 and the top cover B.

A circular knob 38 is provided on the outer periphery of the lower end of the front side of the side wall 31, and as shown in FIG. 2(b), a locking protrusion 39 is vertically provided on the inner periphery of the lower end of the side wall 31, which engages with the inner periphery of the lid engagement part 22 of the cap body A, and an engagement recess 40 is provided in the center, which engages with the bulge 23 of the lid engagement part 22 to maintain the lid in the closed state.

As shown in FIG. 1(b), after the hinge cap of this embodiment is closed, the height between the bottom surface 19 of the bottom wall 11 of the transition plug 10 of the cap body A on the hinge C side and the lower end of the sealing tube 32 of the top cover B is α, the width between the tip of the thin-walled weakened portion 8 remaining on the bottom wall 11 after fracture and the inner circumference of the sealing tube 32 is β, and an inner recess γ on the inside of the sealing tube 32 and an outer recess δ between the side wall 31 and the sealing tube 32 are formed on the inside of the top wall 30 of the top cover B.

In addition, as shown in the modified example in FIG. 3, by connecting the upper inner periphery of the partition 5 of the cap body A and the outer periphery of the bottom surface 19 of the bottom wall 11 with a thin-walled weakened portion 8, the bottom wall 11 of the transfer plug 10 is formed at a position one step higher than the partition 5, and by forming the lower end of the sealing tube 32 of the upper cover B close to the upper surface of the partition 5, the height α between the bottom surface 19 and the lower end of the sealing tube 32 can be reduced.

In addition, in order to prevent unauthorized opening before use, the hinge cap of this embodiment has a shrink label or sealing member between the cap body A and the top lid B, although this is not shown.

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 using a mold.
The hinge cap of this embodiment manufactured by integral molding is obtained in an open state as shown in FIG. 2, and is brought into a closed state as shown in FIG. 1 by rotating the top cover B via the hinge C.
At this time, since the locking protrusion 16 at the top of the lifting portion 12 is narrowed at the top, it easily enters into the locking portion 33, and its upper portion reaches the engagement hole portion 36, while the outer periphery of the lower part of the locking protrusion 16 fits into the inner periphery of the locking portion 33, and the lower surface 33a of the locking portion 33 abuts or comes close to the step portion 15 of the lifting portion 12.
Furthermore, the outer circumferential upper end of the holding wall 13 engages with or abuts against the inner circumferential lower end of the holding receiving wall 34 , and the upper end of the holding wall 13 abuts against or comes close to the lower end of the abutment rib 35 .

The sealing cylinder 32 is in close contact with the pouring cylinder 6 to form a seal, and the lid engaging portion 22 of the cap body A is fitted into the locking protrusion 39 and the engaging recess 40 of the top lid B to form a closed lid state.
In this embodiment, when the lid is closed, the upper part of the locking projection 16 is treated to prevent it from coming off by melting, ultrasonic bonding, or the like, and the locking projection 16 is engaged with the engagement portion 33 as shown in FIG.
Next, the closed hinge cap is attached to the mouth portion 1 of the container body D filled with the content liquid.

When the hinge cap of this embodiment is used for the first time, the top cover B is opened, whereby the thin weakened portion 8 provided on the partition wall 5 of the cap body A is broken, thereby enabling the cap to be opened.
First, when the handle 38 of the top lid B is hooked with the fingers and lifted, the bottom wall 11 on the front side is lifted, causing the thin-walled weakened portion 8 on the front side to begin to break. By further lifting the top lid B, the breakage of the thin-walled weakened portion 8 progresses in the direction of the hinge C, and finally the thin-walled weakened portion 8 close to the hinge C breaks. After being removed from the partition 5, the transfer plug 10 moves to and is retained in the top lid B, while the hole left by the transfer plug 10 removed from the partition 5 in the cap body A becomes an outlet, making it possible to pour out the contents of the container body D.
After the transfer plug 10 is opened, when the top lid B is closed again, the outer periphery of the sealing tube 32 of the top lid B comes into close contact with the inner periphery of the dispensing tube 6 of the cap body A, thereby sealing the inside of the dispensing tube 6.

In this embodiment, since the reinforcing rib 14 is provided on the hinge C side of the pull-up portion 12, stress is concentrated on the thin weakened portion 8 on the front side, making the thin weakened portion 8 prone to breakage.
Furthermore, in this embodiment, the front end 11a of the bottom wall 11 on the front side is formed in a pointed shape, which makes it easier for stress to be concentrated on the thin-walled weakened portion 8 on the front side.

In the hinge cap of this embodiment, when the liquid content is a seasoning such as a dressing or sauce, if the container body D is shaken up and down with the lid closed to stir the liquid content, the transfer plug 10 attached to the top lid B causes the liquid content to adhere to the bottom surface 19 of the bottom wall 11.

Next, when the top lid B is opened, the transition plug 10 attached to the top lid B opens with the bottom wall 11 tilting toward the hinge C. Therefore, depending on the setting of the height α between the bottom surface 19 and the lower end of the sealing cylinder 32 and the width β between the tip of the thin-walled weakened portion 8 and the inner circumference of the sealing cylinder 32, some of the liquid remaining on the bottom surface 19 not only flows down and is stored in the inner recess γ on the inside of the sealing cylinder 32, but may also flow down into the outer recess δ between the side wall 31 and the sealing cylinder 32.
Furthermore, when the container body D is tilted forward with the top lid B open, the liquid content within the container body D can be poured out via the pouring tube 6.
Furthermore, when the lid is closed again, the liquid that has flowed down and accumulated in the inner recess γ flows through the sealed cylinder 32 and is returned to the pouring cylinder 6, but the liquid that has flowed down to the outer recess δ will soil the cap body A on the outside of the pouring cylinder 6.

In this embodiment, in order to confirm the effect of setting the height α between the bottom surface 19 on the hinge C side and the lower end of the sealing cylinder 32, and the width β between the tip of the thin-walled weakened portion 8 and the inner circumference of the sealing cylinder 32, an experiment was conducted to compare the flow-down state of the content liquid adhering to the bottom surface 19 when the lid was opened after stirring for hinge caps with different heights α and widths β.
The liquid content used in the experiment was yakiniku sauce, the hinge cap was for a container body D with an inner diameter of the mouth 1 of 20 mm, and was made of LLDPE (linear low density polyethylene) resin.

The comparative experiment was performed by creating hinge caps with heights α and widths β as shown in Figures 4(a) to (c), attaching each hinge cap to a container body D, shaking the container body D up and down to stir the contents, and then taking photographs with the hinge caps in the open state. The photographs taken are shown in Figure 5.
When the height α of the hinge cap shown in FIG. 4(a) was set to 0.2 mm and the width β to 0.05 mm, the hinge cap dripped continuously into the outer recess δ after one or several tests, as shown in FIG. 5(a).
When the height α and width β of the hinge cap shown in FIG. 4(b) were set to 1.2 mm and 1.5 mm, dripping into the outer recess δ was observed in rare cases after multiple tests, as shown in FIG. 5(b).
In the hinge cap shown in FIG. 4(c), when the height α was set to 0.2 mm and the width β was set to 3.5 mm, no liquid dripped into the outer recess δ even after multiple tests, as shown in FIG. 5(c).

Furthermore, Table 1 shows the experimental results when the height α was changed within the range of 0.2 mm to 6 mm and the width β was changed within the range of 0.05 mm to 5.5 mm.
In Table 1, the samples that continuously dripped into the outer recess δ after one or several stirring tests were marked with "X", the samples that rarely dripped into the outer recess δ after multiple tests were marked with "△", and the samples that did not drip into the outer recess δ even after multiple tests were marked with "○". In addition, "△" and "○" were marked as acceptable, and "X" was marked as unacceptable.

From the above experimental results, when the tip of the thin-walled weakened portion 8 and the lower end of the sealed cylinder 32 approach each other after fracture, and the height α is 0.2 mm and the width β is 1.5 mm, the surface tension of the liquid flowing from the bottom surface 19 into the space between the tip of the thin-walled weakened portion 8 and the lower end of the sealed cylinder 32 causes the liquid from the bottom surface 19 to flow down into the inner recess γ, thereby suppressing dripping into the outer recess δ.
Furthermore, when the tip of the thin weakened portion 8 and the lower end of the sealing cylinder 32 approach each other and the width β becomes 0.8 mm or less, the liquid adhering to the bottom surface 19 flows directly to the lower end of the sealing cylinder 32 and drips into the outer recess δ.

In addition, when the tip of the thin-walled weakened portion 8 and the lower end of the sealing cylinder 32 become separated and the height α and width β both increase, the liquid flowing down from the bottom surface 19 accumulates only in the inner recess γ, but when the height α becomes 6 mm or more, the length from the top wall 30 of the sealing cylinder 32 becomes shorter accordingly, and when the top cover B is in a position where it is opened by more than 90° relative to the cap body A during opening, the liquid dripping from the bottom surface 19 toward the hinge C does not remain at the lower end of the sealing cylinder 32, and instead drips directly into the outer recess δ.
According to the experimental results shown in Table 1, in order to prevent dripping into the outer recess δ, the height α is preferably in the range of 0.2 mm to 5 mm and the width β is preferably in the range of 1.5 mm to 5.5 mm, more preferably the height α is in the range of 0.2 mm to 3.5 mm, and more preferably the width β is in the range of 2 mm to 5.5 mm.

In addition, in this embodiment, the outer periphery of the retaining wall 13 of the transition plug 10 engages or abuts with the inner periphery of the retaining receiving wall 34 of the top lid B, and the rear end 11b of the bottom wall 11 is firmly held. Therefore, the bottom wall 11 closes the spout, and even if the container body D is turned sideways or shaken violently, the rear end 11b of the bottom wall 11 is not easily deformed, making it difficult for the liquid contents to enter through the gap between the bottom wall 11 and the partition wall 5. Even if the liquid contents do enter through the gap between the bottom wall 11 and the partition wall 5, the retaining wall 13 prevents the liquid contents from flowing into the transition plug 10. Therefore, even if the lid is opened again, the liquid contents are prevented from contaminating the inside and outside of the container body D.

Furthermore, in this embodiment, the retaining receiving wall 34 of the upper lid B has an abutment rib 35 formed at the center of the inner circumference on the hinge C side, and the abutment rib 35 is arranged so as to be close to or abut against the upper end of the retaining vertical wall 13 when the inner circumference of the retaining receiving wall 34 engages or abuts with the outer circumference of the retaining vertical wall 13 of the transition plug 10, so that even if the top wall 30 of the upper lid B is pushed in, the engagement or abutment between the retaining vertical wall 13 and the retaining receiving wall 34 can be prevented from coming loose.
In this embodiment, the contact rib 35 is provided at only one location on the holding receiving wall 34, but it may be provided at multiple locations.
In addition, since the transition plug 10 has a peripheral wall 18 around the entire circumference of the bottom wall 11, when the top lid B is closed after opening, even if the transition plug 10 moves downward from before opening, the closure of the spout is not impaired. Furthermore, since the peripheral wall 18 is provided around the entire circumference of the bottom wall 11, the liquid content is prevented from entering the space between the transition plug 10 and the top lid B.

In the above embodiment, the hinge cap is attached to the container body D by plugging, but it may also be attached by screwing.

The hinge cap of the present invention can be widely used as a hinge cap for containers that store liquid contents that need to be stirred, because even if the liquid contents adhere to the bottom surface of the transfer stopper by shaking the container body before use, the liquid contents will not drip onto the outside of the sealed tube inside the top lid when the top lid is opened.

A Cap body B Top lid C Hinge D Container body α Height β Width γ Inner recess δ Outer recess 1 Mouth 2 Engagement protrusion 5 Partition 6 Spouting tube 7 Mounting portion 8 Thinned and weakened portion 10 Transfer plug 11 Bottom wall 11a Front end 11b Rear end 12 Pull-up portion 13 Retaining vertical wall 14 Reinforcing rib 15 Step portion 16 Locking protrusion 17 Recess 18 Peripheral wall 19 Bottom surface 20 Inner tube 21 Outer tube 22 Lid engagement portion 23 Bulging portion 24 Engagement protrusion 25 Outer peripheral cut portion 26 Slit groove 30 Top wall 31 Side peripheral wall 32 Sealing tube 33 Engagement portion 33a Lower surface 34 Retaining receiving wall 35 Abutment rib 36 Engagement hole portion 37 Engagement projection 38 Knob 39 Engagement protrusion 40 Engagement recess

Claims (3)

A hinge cap comprising a cap body attached to the mouth of a container body and a top lid connected to the cap body via a hinge,
The cap body includes a partition wall that closes the mouth of the container body, a pouring tube that is erected on the partition wall, and a transfer plug that is defined by a breakable thin-walled weakened portion in the partition wall inside the pouring tube and has a flat bottom surface that is transferred to and held by the upper lid side when the lid is opened,
The upper cover is provided with a sealing tube that is hung from the lower surface of the top wall and is in close contact with the inner periphery of the pouring tube to seal the inside of the pouring tube.
A hinge cap characterized in that the height between the bottom surface and the lower end of the sealing cylinder is 0.2 mm to 3.5 mm , and the width between the tip of the thin-walled weakened portion on the hinge side and the inner circumference of the sealing cylinder is 2 mm to 5.5 mm. 2. The hinge cap according to claim 1 , wherein the thin weakened portion is formed to connect an inner peripheral upper end of the partition wall and a bottom surface of the transition plug. The transition plug has a retaining wall erected from the hinge side,
3. The hinge cap according to claim 1 , wherein the upper cover is provided with a support wall that is hung from the lower surface of the top wall and engages with or abuts against the support wall.

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