JP7044623B2 - Hinge cap with inner plug - Google Patents

Description

The present invention relates to a hinge cap composed of an inner plug having a pouring cylinder and an outer cap attached to the inner plug, and more particularly to a hinge cap with an inner plug provided with an opening mechanism that does not use a pull ring.

Conventionally, food containers that contain contents such as dressings and seasonings are defined by a weakening part in the inner plug attached to the mouth of the container in order to keep the inside of the container sealed until the time of opening. A cap with an inner plug is widely used in which a partition wall forming the removed wall portion is provided, and the pull ring provided on the removed wall portion is pulled up to tear off the removed wall portion to open the spout.

However, a relatively large force is required to pull up the pull ring and break the weakened part, and it may be difficult for children and the elderly with weak fingertips to open the cap.
In addition, depending on how the pull ring is pulled up, the pull ring may be torn off in the middle, making it difficult to open the cap.
For this reason, a hinge cap with an inner plug that can be opened by the rotational operation of the outer cap attached to the inner plug, instead of opening by a pull ring, has been conventionally known as a prior art (see, for example, Patent Document 1). ).

Japanese Patent Application Laid-Open No. 2015-221690

In the hinge cap with an inner plug described in Patent Document 1, the cap body is rotatably attached to the inner plug, and the inner plug is connected to the inner peripheral surface of the dispensing cylinder via a thin-walled weakened portion and is connected to the peripheral surface. A transition plug having one tooth is provided, and the upper lid is provided with a tubular portion that is vertically hung from the back surface of the top wall and has a second tooth on the peripheral surface, and a hinge cap (outer cap) is opened by a predetermined position. By rotating in the plug direction, the first tooth portion and the second tooth portion are engaged with each other so that the thin-walled weakened portion can be broken, and the hinge cap is further rotated in the plug opening direction to form a hinge cap. It is equipped with a lock mechanism that prevents the inner plug from rotating.
However, the hinge cap with the inner plug has a problem that the torque required for the break increases because the outer cap rotates in the same plane to break the thin-walled weakened portion connecting the transition plugs in the dispensing cylinder. was there.
Further, it is not possible to determine whether or not the hinge cap with an inner plug described in Patent Document 1 is opened only by looking at the appearance, and for the time being, it is necessary to perform an operation of confirming whether or not the upper lid can be opened.

The present invention has an object of solving the above problem, and can be opened by simply rotating the outer cap in the screwing direction without using a pull ring, and has an inner plug that can be confirmed at a glance that the cap has been opened. It is intended to provide a hinge cap.

In order to solve the above problems, the present invention is attached to a hinge cap with an inner stopper, which is attached to the mouth of the container body to form an injection cylinder for pouring out the contents, and to the inner stopper. The inner plug is connected to the inner peripheral surface of the spouting cylinder via a thin-walled weakened portion to seal the spout, and the thin-walled weakened portion breaks when the outer cap rotates, so that the inner plug side The transition plug that shifts from the outer cap to the outer cap side, the fitting cylinder that fits into the mouth of the container body, the cylinder wall that stands on the inner upper part of the fitting cylinder, and the outer circumference of the fitting cylinder. It has a male screw portion formed on the surface, a guide cylinder portion erected on the outer upper part of the fitting cylinder portion, and a positioning convex portion formed on the outer peripheral surface of the cylinder wall portion, and the outer cap is an inner plug. It has a cap body that is rotatably screwed into the cap body and an upper lid that is connected to the cap body via a hinge. The outer peripheral wall is erected from the inside of the upper end of the outer peripheral wall, and the sliding contact wall where the guide cylinder portion of the inner plug and the inner circumference are in sliding contact with each other, the substrate portion connected to the inner circumference of the upper end of the sliding contact wall, and the substrate portion. It has a positioning cylinder part that is vertically hung from the inner edge and has a protruding protrusion that comes into contact with the positioning convex part of the inner plug, and by rotating the outer cap in the screwing direction, the thin-walled weakened part is broken. A configuration is adopted in which the outer cap is raised from the inner plug, and the overhanging protrusion of the cap body abuts on the positioning convex portion of the inner plug to prevent the outer cap from rotating.

As an embodiment of a hinge cap with an inner plug, the inner plug has a plurality of positioning convex portions, and the plurality of positioning convex portions are outward from the upper first positioning convex portion than to the lower second positioning convex portion. The cap body has a structure characterized by a large diameter, and the cap body has a bendable ring portion which is erected from the outer peripheral wall screwed to the inner plug and has a sloped portion formed on the upper end surface, and the upper lid has a flexible ring portion. A configuration characterized by having a sloped portion formed on the lower end surface of the side peripheral wall and in contact with the sloped portion of the ring portion is adopted.

Further, as a specific embodiment of the hinge cap with an inner plug, the upper lid has a top wall and an engagement portion that hangs from the top wall and engages with the transition plug body, and the transition plug body engages with the top lid. It has an engaging cylinder that engages with the portion, the engaging cylinder has a first engaging protrusion provided on the inner circumference and a first tooth portion provided on the outer periphery, and the engaging portion has an engaging portion on the outer periphery. It has a second engaging protrusion that can be engaged with the first engaging protrusion, and the upper lid has a sealing cylinder that is arranged on the outside of the engaging portion and has a second tooth portion on the inner circumference. The first tooth portion and the second tooth portion adopt a configuration characterized by constituting a ratchet mechanism that engages only when the outer cap is screwed off.

In the hinge cap with an inner plug of the present invention, the outer cap is rotated in the screwing direction to raise the outer cap from the inner plug while breaking the thin-walled weakened portion connecting the dispensing cylinder and the transition plug body. You can confirm at a glance that the cap has been opened.

Further, the hinge cap with an inner plug of the present invention has a bendable ring portion having a gradient portion formed on the upper end surface and a gradient portion formed on the lower end surface of the side peripheral wall of the upper lid and in contact with the gradient portion of the ring portion. By holding the ring portion from the outside, a force is generated in the direction of opening the upper lid by the inclined portion.

It is a figure which shows the state which the hinge cap with the inner plug of an Example is closed in a set state, (a) is the XX arrow sectional view of (b), (b) is the sectional side view. It is a figure which shows the inner plug of an Example, (a) is a top view, (b) is a cross-sectional side view, (c) is a side view. It is a figure which shows the outer cap of an Example, (a) top view, (b) is a sectional side view. It is an enlarged view of the main part of FIG. 1 (a). It is a figure which shows the state which the hinge cap with the inner plug of an Example is opened, (a) is the YY arrow view sectional view of (b), (b) is a sectional side view. It is a figure which shows the state which the hinge cap with the inner plug of an Example is opened, (a) is the sectional side view immediately after opening of an upper lid, (b) is the sectional side view when the upper lid is completed opening. ..

Next, the hinge cap with an inner plug of the present invention will be described with reference to the drawings showing examples.
In the following description, in FIG. 1 (b), the left direction is "front (front)", the right direction is "rear (rear)", the upward direction is "up", and the downward direction is "down". ".

In FIG. 1, A is a container body, B is an inner plug attached to the mouth of the container body A, C is a cap body attached to the inner plug B, and D is a cap body C that can be opened and closed via a hinge E. It is a continuous upper lid, and the cap main body C, the upper lid D, and the hinge E constitute an outer cap G.

As shown in FIG. 1, the container body A is provided with a mouth portion 1 at the upper portion, and a locking ridge 2 is formed on the outer periphery of the upper portion of the mouth portion 1.
As shown in FIGS. 1 and 2, the inner plug B has a fitting cylinder portion 4 fitted to the mouth portion 1 of the container body A and a cylinder wall portion 5 erected on the inner upper portion of the fitting cylinder portion 4. And the pouring cylinder portion 6 which is continuously provided on the upper inner peripheral side of the cylinder wall portion 5.

As shown in FIG. 2, the fitting cylinder portion 4 of the inner plug B is located on the top surface side of the outer cylinder 8 on the outer peripheral side, the inner cylinder 9 on the inner peripheral side, and the mouth portion 1, and has an inclined surface on the outer peripheral side. The upper wall 10 is formed, and a fitting groove into which the mouth portion 1 is fitted is formed between the outer cylinder 8 and the inner cylinder 9, and the mouth portion 1 is locked at the lower portion of the inner peripheral surface of the outer cylinder 8. A locking reduced diameter portion 11 that engages with the ridge 2 and prevents the mouth portion 1 from coming off is provided.
A male screw portion 12 is formed on the outer peripheral surface of the outer cylinder 8, a guide cylinder portion 13 having the same diameter as the outer diameter of the outer cylinder 8 is formed on the outer upper portion of the outer cylinder 8, and the outer cylinder 8 and the guide cylinder are further formed. The section 13 is provided with a sorting mechanism that separates the inner plug B from the container body A so that it can be sorted and disposed of.

Explaining the sorting mechanism, as shown in FIGS. 2A and 2C, the outer cylinder 8 has a slit-shaped outer peripheral cut portion 14 on the outer peripheral surface continuously from the guide cylinder portion 13 and an outer peripheral cut portion 14. An inner peripheral cut portion 15 is formed in the locking reduced diameter portion 11 on the inner peripheral surface corresponding to the above, and a cut portion for forming a vertical tear line that can be broken in the vertical direction is formed.

A slit groove 16 is formed between the upper wall 10 and the guide cylinder portion 13 to a terminal position (not shown) separated from the outer peripheral cut portion 14 in the left direction by a predetermined distance.
Further, the outer cylinder 8 is formed with a fractured end surface 17 that serves as a trigger for tearing, and the guide cylinder portion 13 is provided with a grip portion 18 having rounded corners for gripping with fingers when tearing.

The cylinder wall portion 5 is erected on the inner peripheral edge of the upper wall 10 of the fitting cylinder portion 4, and the first positioning convex portion 20 and the second positioning convex portion 21 are spaced from the upper end on the outer peripheral surface of the cylinder wall portion 5. It is rushed in order with a space.
In the upper first positioning convex portion 20 and the lower second positioning convex portion 21, the outer diameter of the first positioning convex portion 20 is formed to be larger than the outer diameter of the second positioning convex portion 21.

The dispensing cylinder portion 6 has a dispensing cylinder 24 erected on the inner peripheral edge of the annular top wall 23, and the dispensing cylinder 24 has a cylindrical lower portion 25 connected to the top wall 23 and an upper portion of the cylindrical lower portion 25. It is provided with a lip portion 26 that forms an inner peripheral surface that expands and curves outward in diameter, and forms a guide surface that guides the contents to be poured.
A transition plug 28 is integrally connected to the inner peripheral surface of the cylindrical lower portion 25 forming the spout via a thin-walled weakening portion 27 provided over the entire circumference.
In the transition plug body 28, a cylindrical engaging cylinder 29 is erected at the upper part, and a bottom wall 30 at the lower part seals a spout together with a thin-walled weakened portion 27.

As shown in FIG. 4, in the engaging cylinder 29, engaging protrusions 31 constituting one first tooth portion of the ratchet mechanism are projected at six points in the circumferential direction on the outer periphery, and the first engagement is provided on the upper part of the inner circumference. The abutment portion 32 is projected in an annular shape.
The engaging protrusion 31 is formed on the first engaging surface 33 formed in the substantially radial direction to engage with the second tooth portion of the upper lid D, which will be described later, and is formed on the opposite side in the circumferential direction and is screwed from the outer peripheral surface of the engaging cylinder 29. It has a non-engaging surface 34 inclined in the landing direction, and its plan view shape is a substantially trapezoidal shape with the outer peripheral surface side of the engagement cylinder 29 as the base.
If the engaging projection 31 has a first engaging surface 33 formed in the substantially radial direction and an inclined non-engaging surface 34, the plan view is not substantially trapezoidal but has a substantially right-angled triangular shape. But it may be.

Further, in the present embodiment, the engaging protrusions 31 are provided at 6 places in the circumferential direction, but the engaging protrusions 31 are not limited to 6 places, but may be provided at a plurality of appropriate places according to the shape of the transition plug 28 and the like.
The bottom wall 30 has a diameter-expanded portion 35 having a predetermined height from the lower surface on the outer peripheral side of the engaging cylinder 29, and a flange portion 36 connected to the outer peripheral side of the diameter-expanded portion 35 and connected to the thin-walled weakened portion 27. And have.

As shown in FIG. 3, the cap main body C has a cylindrical outer peripheral wall 40 and a sliding contact wall 41 which is erected from the inside of the upper end of the outer peripheral wall 40 and in which the guide cylinder portion 13 of the inner plug B and the inner circumference are in sliding contact with each other. An annular substrate portion 42 connected to the inner circumference of the upper end of the sliding contact wall 41, a positioning cylinder portion 43 suspended from the inner edge of the substrate portion 42, and a bendable ring portion erected from the outside of the upper end of the outer peripheral wall 40. It is equipped with 44.

A female threaded portion 45 screwed with the male threaded portion 12 of the inner plug B is formed on the inner peripheral surface of the outer peripheral wall 40, and the upper outer periphery of the sliding contact wall 41 is in a closed state by engaging with the upper lid D described later. A lid engaging portion 46 is formed to maintain the above.

The lower end surface of the positioning cylinder portion 43 extends to a height that abuts on the upper surface of the upper wall 10, and an overhanging protrusion 47 is provided on the outer periphery of the lower end of the positioning cylinder portion 43.
The overcoming protrusion 47 constitutes a positioning mechanism that is stably positioned at a position overcoming the first positioning convex portion 20 and the second positioning convex portion 21 formed on the outer peripheral surface of the cylinder wall portion 5 of the inner plug B.
The upper end surface of the ring portion 44 is formed with an uphill slope portion 48 from the inner peripheral side to the outer peripheral side.

The upper lid D includes a top wall 50 forming a top plate portion, a side peripheral wall 51 hanging from the outer peripheral edge of the top wall 50, and an inner cylinder 52 hanging from the back surface of the top wall 50 inside the side peripheral wall 51. A sealing cylinder 53 suspended from the top wall 50 further inside the inner cylinder 52, and an engaging portion 54 hanging from the top wall 50 further inside the sealing cylinder 53 are provided.
As shown in FIGS. 1 and 5, a reinforcing rib 55 that hangs down from the top wall 50 and projects inward is provided on the inner circumference of the side peripheral wall 51, and the lower end surface of the reinforcing rib 55 is the side peripheral wall 51. It extends to a height that abuts on the substrate portion 42 together with the inner peripheral side end surface of the lower end portion.

An inclined end 56 is formed at the lower end of the side peripheral wall 51, and a hinge E is continuously provided on the back side of the lower end peripheral edge of the inclined end 56, and the lower end opposite to the hinge E (front side). A knob 57 is provided on the peripheral edge.
On the inner circumference of the inclined end portion 56, a recess that engages with the lid engaging portion 46 of the upper lid D to maintain the closed state and an engaging ridge 64 are formed at the lower portion thereof, and below the inclined end portion 56. A gradient portion 65 that abuts on the upper end surface of the ring portion 44 is formed on the end surface.

On the inner circumference of the sealing cylinder 53, engaging arms 58 constituting the second tooth portion that engage with the engaging protrusion 31 constituting the first tooth portion are provided at six locations in the circumferential direction in the same number as the engaging protrusion 31. ing.
Further, a sealing portion 59 is formed on the outer peripheral surface of the sealing cylinder 53 to abut on the inner peripheral surface of the dispensing cylinder 24 to seal the inside of the container.
The engaging portion 54 is formed in a cylindrical shape in which a second engaging protrusion 60 that can be engaged with the first engaging protrusion 32 is provided on the outer peripheral surface and the central portion is lightened.

As shown in FIG. 4, the engaging arm 58 has a second substantially radial direction that engages with the first engaging surface 33 of the engaging projection 31 when the hinge cap is rotated in the screw release direction at the time of opening. It is provided with a tip engaging portion 62 having an engaging surface 61, and an arm portion 63 thinner than the tip engaging portion 62 extending in an inclined direction from the inner peripheral surface of the sealing cylinder 53 in the screw-off direction.
An upper lid D is continuously provided on the outer cap G by a hinge E provided on the back side of the upper part of the ring portion 44 of the cap body C, and the upper lid D rotates around the hinge E and can be opened and closed.

Next, the usage mode and the action and effect of this example will be described.
First, in order to set the outer cap G on the inner plug B, the upper lid D is rotated around the hinge E to cover the cap body C, the outer cap G is closed, and then the male screw portion of the inner plug B is set. The female screw portion 45 of the cap body C is screwed into 12 and tightened.
At this time, the cap body C rotates in the screwing direction, the engaging arm 58 rides on the non-engaging surface 34, gets over the engaging protrusion 31, and allows the cap body C to rotate.

Further, the lower portion of the positioning cylinder portion 43 allows a slight deformation, and the overcoming protrusion 47 can get over the first positioning convex portion 20 and the second positioning convex portion 21 of the cylinder wall portion 5 and descend.
At the same time as the setting process of the inner plug B and the outer cap G progresses, the engaging portion 54 is fitted to the engaging cylinder 29, and the second engaging protrusion 60 gets over the first engaging protrusion 32. Fit.
Eventually, the lower surface of the positioning cylinder portion 43 abuts on the upper surface of the upper wall 10, and the lower end surface of the inner cylinder 52 of the upper lid D abuts on the upper surface of the top wall 23, and the fastening of both screws is completed.

For the hinge cap with an inner plug for which the setting process has been completed, apply the mouth portion 1 of the container body A to the fitting groove formed between the outer cylinder 8 and the inner cylinder 9 of the inner plug B, and attach the outer cap G from above. By pressing, the locking reduced diameter portion 11 gets over and engages with the locking ridge 2, and the plugging process is completed.
In the tapping step, the lower end surface of the inner cylinder 52 of the upper lid D abuts on the upper surface of the top wall 23 of the inner plug B, and the reinforcing rib 55 of the upper lid D and the lower end of the inner peripheral side of the side peripheral wall 51 are the upper surface of the substrate portion 42. Since the lower end of the positioning cylinder portion 43 suspended from the substrate portion 42 is in contact with the upper wall 10, the tapping force applied to the upper portion of the upper lid D efficiently applies to the fitting cylinder portion 4. It is transmitted to, and no unreasonable force is applied.

Next, in order to use the container to which the hinge cap with the inner plug of this embodiment is attached, the outer cap G is rotated from the state shown in FIG. 1 in the opening direction indicated by the arrow in FIG. 1 (a). , The female threaded portion 45 of the outer cap G is rotated in the screwing direction.
When rotating the outer cap G, the outer peripheral wall 40 may be gripped and rotated, but when the outer circumference of the ring portion 44 is gripped, the ring portion 44 is deformed to the inner peripheral side on the front side, and the gradient portion of the upper lid D is formed. The gradient portion 48 in contact with the 65 can generate a force that pushes up the upper lid D in the opening direction.

When the outer cap G is rotated in the opening direction, as shown in FIG. 5A, the second engaging surface 61 of the engaging arm 58 abuts on the first engaging surface 33 of the engaging projection 31 and engages with it. When they are matched, the rotational force of the outer cap G is applied to the transition plug 28 via the ratchet mechanism.
At this time, as the outer cap G rotates, the cap body C starts to rise, and as shown in FIG. 5B, the overhanging protrusion 47 of the positioning cylinder portion 43 is deformed to the outer peripheral side. It gets over the second positioning convex portion 21 of the inner plug B.

At the same time, since the second engaging protrusion 60 of the engaging portion 54 is tightly fitted to the inner peripheral surface overcoming the first engaging protrusion 32 of the engaging cylinder 29, the engaging cylinder 29 is fitted from the inside. Reinforced, the rotational force of the outer cap G is easily transmitted to the transition plug 28 via the ratchet mechanism, and a force is generated to pull up the transition plug 28 as the female screw portion 45 rotates.
As the rotation of the outer cap G progresses, as shown in FIG. 5B, the thin-walled weakened portion 27 is finally broken by the rotational force and the pulling force applied to the transition plug 28, and the spout is opened. The transition plug 28 separated from the outlet cylinder 24 is pulled up by the engaging portion 54 engaged with the engaging cylinder 29 and rises together with the outer cap G.

When the thin-walled weakened portion 27 broke and the spout was opened, as shown in FIG. 6A, the slanted portion 48 had been added to the slanted portion 65 of the upper lid D by the deformation of the ring portion 44 until then. It can be determined at a glance that the upper lid D has been lifted by the force of opening the lid and the cap has been opened.
Further, as the rotation of the outer cap G progresses, the overhanging protrusion 47 of the positioning cylinder portion 43 comes into contact with the first positioning convex portion 20 of the inner plug B, and the rotation of the outer cap G suddenly becomes heavy and stops.

As shown in FIG. 6B, when the finger is put on the knob 57 in the opened state and the upper lid D is opened, the transition plug 28 is supported by the upper lid D by the engaging portion 54, so that the upper lid D is supported. At the same time, the spout is separated from the inner plug B, and a spout is opened on the inner circumference of the spout cylinder 24.
As described above, the hinge cap with the inner plug of the present embodiment can be opened and opened by simply rotating the outer cap G in the opening direction from the set state immediately after the capping, and it is a simple operation. You can start using the container.

As shown in FIG. 2, the hinge cap with an inner plug of this embodiment is separated from the container body A by a simple operation when the container is disposed of after being used by the sorting mechanism provided at the lower part of the outer cylinder 8. It can be sorted and disposed of.
First, when a finger is put on the grip portion 18 of the guide cylinder portion 13 and the grip portion 18 is pulled toward the front, the vertical tear line by the inner peripheral notch portion 15 is broken, and the broken end face 17 expands outward.
Further, when the grip portion 18 is pulled strongly, the circumferential fracture portion provided along the slit groove 16 breaks, the fracture progresses to the end position of the slit groove 16, and the locking contraction occurs where the circumferential fracture portion breaks. Since the engagement of the diameter portion 11 with the locking ridge 2 is released, the restraint on the mouth portion 1 by the locking reduction portion 11 is released, and the inner plug B is separated from the container body A and separately discarded. Can be done.

In the hinge cap with an inner plug of the present invention, the outer cap can be lifted from the inner plug while opening the transition plug body of the inner plug by simply rotating the outer cap in the screwing direction, and the use of the container can be started. Since it can be used, it does not require a large force to open the cap unlike the cap using a conventional pull ring, and it does not require troublesome operation, so it can be easily used by children and the elderly, and the container cap can be used. It is widely available as.

A Container body B Inner plug C Cap body D Top lid E Hinge G Outer cap 1 Mouth 2 Locking protrusion 4 Fitting cylinder part 5 Cylinder wall part 6 Injection cylinder part 8 Outer cylinder 9 Inner cylinder 10 Upper wall 11 Locking Reduced diameter part 12 Male thread part 13 Guide cylinder part 14 Outer peripheral notch part 15 Inner circumference notch part 16 Slit groove 17 Broken end face 18 Grip part 20 First positioning convex part 21 Second positioning convex part 23 Top wall 24 Injection cylinder 25 Cylindrical shape Lower part 26 Lip part 27 Thin-walled weakened part 28 Transition plug 29 Engagement cylinder 30 Bottom wall 31 Engagement protrusion (first tooth part)
32 1st engaging protrusion 33 1st engaging surface 34 Non-engaging surface 35 Expanded diameter part 36 Flange part 40 Outer wall 41 Sliding contact wall 42 Board part 43 Positioning cylinder part 44 Ring part 45 Female thread part 46 Lid engaging part 47 Overcoming protrusions 48, 65 Slope 50 Top wall 51 Side peripheral wall 52 Inner cylinder 53 Sealed cylinder 54 Envelope 55 Reinforcing rib 56 Inclined end 57 Grip 58 Engagement arm (second tooth)
59 Seal portion 60 Second engaging protrusion 61 Second engaging surface 62 Tip engaging portion 63 Arm portion 64 Engaging ridge

Claims (4)

It is equipped with an inner plug that is attached to the mouth of the container body and forms a dispensing tube that dispenses the contents, and an outer cap that is attached to the inner plug.
The inner plug is connected to the inner peripheral surface of the pouring cylinder via a thin-walled weakened portion to seal the spout, and the thin-walled weakened portion breaks when the outer cap rotates and shifts from the inner plug side to the outer cap side. The transition plug , the fitting cylinder that fits into the mouth of the container body, the cylinder wall that stands on the inner upper part of the fitting cylinder, and the male screw portion that is formed on the outer peripheral surface of the fitting cylinder. It has a guide cylinder portion that is erected on the outer upper portion of the fitting cylinder portion, and a positioning convex portion that is formed on the outer peripheral surface of the cylinder wall portion .
The outer cap has a cap body that is rotatably screwed into the inner plug and an upper lid that is connected to the cap body via a hinge.
The cap body is erected from the inside of the upper end of the outer peripheral wall where the female thread part to be screwed with the male thread part of the inner plug is formed on the inner peripheral surface, and the guide tube part of the inner plug and the inner circumference are in sliding contact with each other. It has a tangential wall, a substrate portion connected to the inner circumference of the upper end of the sliding tangential wall, and a positioning cylinder portion that is vertically provided from the inner edge of the substrate portion and has an overhanging protrusion that abuts on the positioning convex portion of the inner plug. death,
By rotating the outer cap in the screwing direction, the outer cap is raised from the inner plug while breaking the thin-walled weakened part, and the overhanging protrusion of the cap body comes into contact with the positioning convex part of the inner plug to rotate the outer cap. A hinge cap with an inner plug that is characterized by blocking. The inner plug has a plurality of positioning protrusions and has a plurality of positioning protrusions.
The hinge cap with an inner plug according to claim 1, wherein the plurality of positioning convex portions have a larger outer diameter in the upper first positioning convex portion than in the lower second positioning convex portion. The cap body has a bendable ring portion that is erected from the outer peripheral wall that is screwed into the inner plug and has a gradient portion formed on the upper end surface.
The hinge cap with an inner plug according to claim 1 or 2, wherein the upper lid is formed on the lower end surface of the side peripheral wall and has a slope portion that abuts on the slope portion of the ring portion. The top lid has a top wall and an engagement that hangs from the top wall and engages with the transition plug.
The transition plug has an engaging tube that engages with the engagement portion of the top lid.
The engaging cylinder has a first engaging protrusion provided on the inner circumference and a first tooth portion provided on the outer periphery.
The engaging portion has a second engaging protrusion that can be engaged with the first engaging protrusion on the outer periphery thereof.
The upper lid has a sealing cylinder which is arranged on the outside of the engaging portion and has a second tooth portion on the inner circumference.
The hinge cap with an inner plug according to any one of claims 1 to 3, wherein the first tooth portion and the second tooth portion form a ratchet mechanism that engages only when the outer cap is screwed off. ..

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