JP7214315B2 - hinge cap - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hinge cap made of synthetic resin, and more particularly to a hinge cap in which a film is insert-molded between a cap body and a lid to form a hinge portion.

Conventionally, a hinge cap comprising a cap body attached to a container and a lid attached to the cap body via a hinge so as to be openable and closable uses polyethylene (PE) or polypropylene (PP) as a synthetic resin. was
However, if the synthetic resin is PP, PP itself is opaque, so it is not possible to obtain a transparent cap or container, and it is not possible to easily print on the dome-shaped curved surface, so decoration is limited. There was a problem that

Therefore, in the hinge cap, it has been conventionally known to form the hinge portion by in-mold molding a synthetic resin film at predetermined positions of the outer peripheral wall of the cap body and the side peripheral wall of the lid body (for example, patent Reference 1).

Japanese Patent No. 4717254

However, in the hinge cap described in Patent Document 1, although a synthetic resin different from that of the cap main body and the lid can be used for the hinge portion, the synthetic resin press-fitted to the outside of the film inserted into the mold during molding of the hinge cap. There was a problem that it was easy to turn around.
In addition, when it is attempted to make the hinge cap from polyethylene terephthalate (PET), the PET resin is hard, so that the hinge part is difficult to bend or whitens.

An object of the present invention is to solve the above-described problems. A hinge cap is formed so that synthetic resin does not flow around the outside of the film inserted into the mold when the film is insert-molded to form the hinge portion. intended to provide

In order to solve the above problems, the present invention provides a hinge cap comprising a cap body attached to a container and a lid attached to the cap body via a hinge so as to be openable and closable, The cap body includes a mounting portion to be mounted on the mouth portion of the container, and recessed grooves formed in a predetermined range at least in the vicinity of both sides of the hinge portion in a circumferential direction from the upper surface of the mounting portion except for the hinge portion side, and a lid body. has a top wall and a side peripheral wall hanging from the peripheral edge of the top wall, and the hinge part connects the mounting part of the cap body and the side peripheral wall of the lid, and is formed by an insert-molded film. A configuration characterized by

As an embodiment of the hinge cap, a configuration is adopted in which the concave groove is formed over the entire circumference except for the hinge portion side from the upper surface of the mounting portion, and the film covers the cap body side of the mold. a main body covering portion that covers the lid side; a lid covering portion that covers the lid side; and a hinge forming portion between the main body covering portion and the lid covering portion. The mounting portion includes a lid engaging portion that engages a side peripheral wall of the lid body, and an outer peripheral wall that extends vertically from the outer peripheral side of the lid engaging portion. Adopting a configuration characterized by deep vertical grooves, adopting a configuration characterized by making the cap main body and the lid body made of polyethylene terephthalate, and making the hinge part made of polyethylene terephthalate film. .

The hinge cap of the present invention is provided with grooves formed over a predetermined range at least in the vicinity of both sides of the hinge portion in the circumferential direction from the upper surface of the mounting portion except for the hinge portion side, thereby forming the hinge portion by insert molding a film. At the time of molding, it is possible to perform molding so that the synthetic resin does not wrap around the outside of the film inserted in the mold.
Further, in the hinge cap of the present invention, when the cap main body and the lid are made of polyethylene terephthalate, and the hinge part is made of polyethylene terephthalate film, the hinge cap of the PET container can be made of PET resin, and the container and the hinge cap can be separated. can be recycled together.

It is a figure which shows the closed state which mounted|wore the container with the hinge cap of 1st Example of this invention, (a) is side sectional drawing, (b) is a rear view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the open lid state of the hinge cap of 1st Example of this invention, (a) is a top view, (b) is side sectional drawing. It is a figure which shows the lid open state of the hinge cap of 1st Example of this invention, (a) is a principal part enlarged view of Fig.2 (a), (b) is a principal part enlarged view of FIG.2(b). be. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the shaping|molding state of the hinge cap of 1st Example of this invention, (a) is an enlarged view near the mounting part of FIG.2(b), (b) is near the hinge part of FIG.2(b). is an enlarged view of. It is a figure which shows the closed state which mounted|wore the container with the hinge cap of 2nd Example of this invention, (a) is side sectional drawing, (b) is the principal part enlarged view of (a). It is a figure which shows the open lid state of the hinge cap of 2nd Example of this invention, (a) is a top view, (b) is side sectional drawing.

The hinge cap of the present invention will be described with reference to the drawings shown as examples.
In the following description, referring to FIG. 1A, the left direction is defined as "front", the right direction is defined as "back", the upward direction is defined as "up", and the downward direction is defined as "down".

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

As shown in FIGS. 1 and 2, the cap main body B includes a mounting portion 3 mounted on the mouth portion 1 of the container A, and an inner edge upper end of the mounting portion 3 extending inward to cover the opening of the mouth portion 1. It comprises a base wall 4 for sealing, a spout 5 opened through the base wall 4, and a spout cylinder 6 erected from the periphery of the spout 5. - 特許庁

The pouring tube 6 is provided with a stepped portion 6a having a reduced diameter at the lower portion of the inner periphery thereof, and the inner peripheral side of the stepped portion 6a communicates with the pouring port 5 so as to be flush therewith.
In addition, in order to facilitate pouring of the content liquid, the ejection tube 6 in this embodiment is formed such that the front side (opposite side to the hinge portion C) is higher than the hinge portion C side, and the lip portion 6b is formed by a trumpet. spread out in a shape.

The mounting portion 3 includes a ring-shaped lid engaging portion 8 which is provided with a locking ridge 7 on the periphery thereof and which engages with the lid body D, and an inner cylinder 9 vertically provided from the inner peripheral side of the lid engaging portion 8. , and an outer peripheral wall 10 extending vertically from the outer peripheral side of the lid engaging portion 8 .
The outer peripheral wall 10 is provided with an engaging protrusion 11 that engages with the fitting protrusion 2 of the mouth portion 1 of the container A at the inner peripheral lower portion.

Further, as shown in FIG. 2(a), the mounting portion 3 has a recessed groove 12 formed in the circumferential direction except for the hinge portion C side (back side) from the upper surface.
In this embodiment, the concave groove 12 is formed with a predetermined depth from the upper surface of the outer peripheral wall 10 of the mounting portion 3 to the entire circumference except for the side of the hinge portion C, and is a longitudinal groove having a U-shaped cross section. is formed over a range of about 300°, the concave groove 12 may be formed in at least a predetermined range in the vicinity of the hinge portion C in the circumferential direction from the upper surface of the mounting portion 3 except for the hinge portion C side. For example, the concave groove 12 is not formed in the range of 180° on the front side of the mounting portion 3 shown in FIG. do it.
Furthermore, the depth of the concave groove 12 is preferably equal to or greater than the longitudinal length of the body covering portion 18 of the film 16 described later in the vicinity of the hinge portion C, but on the front side (opposite side to the hinge portion C) , the depth may be shallower than that in the vicinity of the hinge portion C, or the concave groove may not be formed.

A guide ridge 13 is erected on the upper surface of the base wall 4 outside the pouring tube 6, and an engagement recess 14 is provided around the outer peripheral side lower portion of the guide ridge 13. As shown in FIG.
The engagement recess 14 is adapted to be engaged with a tip portion 23a of an outer cylinder 23 of the lid D, which will be described later, when the lid D receives an impact.
In this embodiment, the guide ridges 13 are provided all around, but they may be provided only on the hinge portion C side.

As shown in FIGS. 1 to 3, the hinge portion C connects the mounting portion 3 of the cap body B and the side peripheral wall 21 of the lid D, and is cut to the width of the hinge portion C. It is formed by insert-molding the film 16 .
In this embodiment, as shown in FIG. 4B, the film 16 includes a main body covering portion 18 covering the cap main body B side of the movable mold 31 and a lid covering the lid D side of the movable mold 31. A body covering portion 19 and a hinge forming portion 17 provided between the body covering portion 18 and the lid covering portion 19 are provided.

As shown in FIGS. 1 and 2, the lid D is rotatably attached to the outer peripheral upper end of the outer peripheral wall 10 of the cap body B via the hinge portion C. 20 and a side peripheral wall 21 extending vertically from the peripheral edge portion thereof.
The top wall 20 has a seal cylinder 22 and an outer cylinder 23 located outside the seal cylinder 22 and having a diameter larger than that of the pouring cylinder 6, which are vertically provided from the inner surface.

The seal cylinder 22 is formed with a normal seal portion a that is inserted into the inner peripheral surface of the pouring cylinder 6 when the lid is closed so as to be in a sealed state. A diameter-diametered lower seal cylinder 22b is provided, and the lower seal cylinder 22b is formed so as to be close to or abut on the spout 5 opened at the inner peripheral lower part of the spout cylinder 6 when the lid is closed. Another temporary seal portion b is formed under the normal seal portion a by the seal tube 22b and the spout 5. As shown in FIG.

Since the hinge cap is sealed with a two-step seal consisting of the normal seal part a and the temporary seal part b, even if one of the seals comes off due to an impact or the like, the other seal seals the hinge cap, preventing the contents from leaking. There is no
In addition, a space is provided between the stepped portion 22a of the sealing tube 22 and the stepped portion 6a of the dispensing tube 6, and a small amount of the content liquid enters the temporary sealing portion b upon receiving an impact such as when the container A is dropped. It becomes the liquid reservoir portion c at the time and can retain the content liquid.

The distal end portion 23a of the outer cylinder 23 is guided by the guide ridge 13 of the base wall 4 of the cap body B when the lid is closed, is inserted into the engagement recess 14, and has a lower surface close to the bottom surface of the engagement recess 14. is formed to

An engaged portion 24 that engages with the lid engaging portion 8 of the cap main body B is provided on the inner peripheral lower portion of the side peripheral wall 21 , and the lid engaging portion 8 is provided on the side peripheral surface of the engaged portion 24 . Engagement recesses 25 that engage with the locking projections 7 to maintain the closed state are provided around the lid.
An arc-shaped handle portion 26 extends in the circumferential direction from the outer circumference of the front side of the side peripheral wall 21 , and a finger hook portion 27 is provided on the lower surface of the central portion of the handle portion 26 .

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

Next, the mode of use and effects of this embodiment will be described.
The hinge cap of this embodiment is molded in an open state as shown in FIG. 2 by a fixed mold 30, a movable mold 31 and a movable core 32 shown in FIG.
First, the hinge forming portion 17 of the film 16 is positioned and fixed on the movable mold 31 and the movable core 32 separated from the fixed mold 30 so as to come to the molding position of the hinge portion C, and then the film 16 is heated by a heater or the like. is heated and softened, and the lid covering portion 19 is sucked by the suction holes 33 formed in a plurality of locations of the movable mold 31, and the hinge forming portion 17 and the lid covering portion 19 of the film 16 are brought into close contact with the inner surface of the mold.

Next, after the body covering portion 18 of the film 16 is brought into close contact with the inner surface of the movable mold 31, the mold is clamped with the fixed mold 30, and the synthetic resin is press-fitted into the cavity for molding.
At that time, as shown in FIG. 4(a), the synthetic resin press-fitted from the vicinity of the center of the cap body B flows toward the outer peripheral wall 10, but the groove 12 is recessed except for the hinge portion C side. Since it is provided, it once descends in the direction of the arrow and then ascends along the outer peripheral surface of the outer peripheral wall 10 .

On the other hand, as shown in FIG. 4B, the synthetic resin press-fitted from the vicinity of the center of the cap main body B flows in the direction of the arrow toward the outer peripheral wall 10 on the side of the hinge portion C, so that the film 16 covers the main body. By pressing the body covering portion 18 against the outer peripheral side of the outer peripheral wall 10, the main body covering portion 18 can be prevented from collapsing as indicated by the phantom line.
In other words, the concave grooves 12 are recessed along the circumferential direction from the upper surface of the outer peripheral wall 10 except for the hinge portion C side, so that the outer peripheral wall 10 other than the hinge portion C side is formed of synthetic resin vertically as indicated by the arrow. By reducing the amount of synthetic resin flowing into the hinge portion C side from the circumferential direction of the outer peripheral wall 10, the synthetic resin does not flow to the outside of the main body covering portion 18 of the film 16 (the side in contact with the movable mold 31). can be prevented.

In the hinge cap of this embodiment thus formed, the lid body D is rotated via the hinge portion C from the state shown in FIG. 2 to cover the cap body B and close the lid.
At this time, the lower outer circumference of the seal cylinder 22 of the lid D is in close contact with the inner circumference of the pouring cylinder 6 of the cap main body B to form the seal portion a, and the lower seal cylinder of the lower outer circumference of the seal cylinder 22 is formed. 22b has an inner peripheral surface that is close to or in contact with the spout 5 of the spout cylinder 6 to form a temporary seal portion b.
In addition, while the lid is closed, the outer cylinder 23 of the lid D descends from the hinge portion C side toward the guide ridges 13 of the base wall 4 of the cap body B, and then the outer cylinder 23 moves toward the guide ridges 13 The distal end portion 23a of the outer cylinder 23 is inserted into the engaging recess 14 of the base wall 4 while being guided by the outer peripheral surface of the outer cylinder 23, and approaches the bottom surface of the engaging recess 14. As shown in FIG.

Next, as shown in FIG. 1, the closed hinge cap is attached to the opening 1 of the container A filled with the content liquid by plugging.
In the plugging step, the mouth portion 1 of the container A is applied to the annular groove formed between the inner cylinder 9 and the outer peripheral wall 10 of the mounting portion 3, a pressing force is applied from above the lid D, and the outer peripheral wall The engaging protrusion 11 of the container A is fitted over the fitting ridge 2 of the mouth portion 1, and the mouth portion 1 of the container A is connected to the outer circumference of the inner cylinder 9, the inner circumference of the outer peripheral wall 10, and the lid engaging portion 8. It is attached by being sandwiched by.

In this embodiment, the mounting portion 3 sandwiches the mouth portion 1 of the container A with the outer periphery of the inner cylinder 9, the inner periphery of the outer peripheral wall 10, and the base wall 4. A male thread may be formed on the outer periphery of the portion 1 and a female thread may be formed on the inner periphery of the outer peripheral wall 10 for screwing.

In the hinge cap of this embodiment, when the lid is closed, the sealing cylinder 22 of the lid D seals the inner circumference of the pouring cylinder 6 of the cap main body B at the sealing part a, and the lower sealing cylinder 22b and the pouring cylinder 6 are separated from each other. The outlet 5 and the temporary seal portion b are sealed in two steps, and even if one seal comes off due to an impact, the other is sealed, so that the airtightness of the container A is maintained and the impact received from dropping or the like is maintained. , Even if the content liquid enters the temporary seal portion b, the content liquid is retained by the liquid reservoir portion c, so that the content liquid does not leak from the seal portion a.

In the hinge cap of this embodiment, even if a pressure force is applied from the side of the lid body D due to impact such as dropping in the closed state, the front end portion 23a of the outer cylinder 23 is engaged with the base wall 4. Since it is fixed by engaging with the place 14, it is possible to prevent the seal cylinder 22 from moving together with the lid body D due to impact.

When opening the hinge cap for the first time to use the content liquid in the container A for the first time, the shrink label and the sealing member provided between the cap body B and the lid body D are removed (not shown). There is a need.

Next, when the handle portion 26 is lifted by putting a finger on the finger hooking portion 27 of the lid D, the lower seal cylinder 22b of the seal cylinder 22 of the lid D is temporarily sealed with the spout 5 at the bottom of the pouring cylinder 6. b is released, the sealing portion a of the cap body B with the pouring tube 6 is released, and the lid D is opened, so that the container A can be easily poured simply by tilting the container A. The content liquid in the container A can be poured out from the tube 6 .
Further, since the cover D has a thin front side of the engaging recess 25 provided in the side peripheral wall 21, the engaging recess 25 of the side peripheral wall 21 is deformed when the handle portion 26 is lifted when the lid is opened. As a result, the resistance of the lid engaging portion 8 against the locking projection 7 is reduced, and the lid can be opened smoothly.

By closing the cap main body B again with the lid D, the lower seal cylinder 22b of the seal cylinder 22 of the lid D approaches the spout 5 of the spout 6 to form a temporary seal portion b, and seal The outer periphery of the tube 22 is in close contact with the inner periphery of the pouring tube 6 of the cap body B to form a seal portion a, which can seal the inside of the cap body B, and the hinge cap repeatedly opens and closes the lid D. can be used.

Next, a second embodiment in which the configuration of the spout 5 and the spout tube 6 is changed will be described.
In the following, the same reference numerals are given to the same parts as in the first embodiment, and the explanation will focus on the points of difference.
In FIG. 5, A is a container, Ba is a cap body attached to the container A, C is a hinge portion, and Da is a lid attached to the cap body Ba via the hinge portion C so as to be openable and closable.

As shown in FIGS. 5 and 6, the cap main body Ba includes a mounting portion 3 mounted on the mouth portion 1 of the container A, a base wall 34 extending inwardly from the upper end of the inner edge of the mounting portion 3, and a base wall 34. and a pouring tube 36 erected from the inner edge of the wall 34 .
The pouring tube 36 has a pouring port edge 37 protruding inward from the lower end thereof, and in this embodiment, the pouring port edge 37 has a shape inclined downward inward.
Further, the shape of the opening of the spout 35 formed by the edge portion 37a of the spout edge portion 37 is elongated in the direction connecting the hinge portion C side and the front side, as shown in FIG. It has a rhombic shape.
Furthermore, in this embodiment, a beam portion 38 projecting downward from the edge portion 37a is formed so as to connect the short diameter portions of the pouring port 35 which is opened in a substantially rhombic shape. can also be provided with a gate for use during molding.

As shown in FIGS. 5 and 6, the lid Da is rotatably attached to the outer peripheral upper end of the outer peripheral wall 10 of the cap body Ba via a hinge portion C. 20 and a side peripheral wall 21 extending vertically from the peripheral edge portion thereof.
The top wall 20 has a first seal cylinder 42 and a second seal cylinder 43 located inside the first seal cylinder 42 and having an outer peripheral shape matching the spout edge 37 .
In the present embodiment, the outer peripheral shape of the second seal cylinder 43 is an elongated, substantially rhomboidal shape that is the same as the shape of the spout 35 based on the edge 37 a , matching the spout edge 37 .

The first sealing tube 42 is formed with a normal first sealing portion d that is inserted into the upper portion of the inner peripheral surface of the pouring tube 36 to establish a sealed state when the lid is closed.
In addition, the second seal cylinder 43 is formed so that the outer peripheral surface of the second seal cylinder 43 approaches or abuts on the edge portion 37a of the pouring port edge portion 37 provided at the inner peripheral lower portion of the pouring cylinder 36 when the lid is closed. A second seal portion e is formed with the edge portion 37a.

The hinge cap is hermetically sealed by the double seal of the first seal portion d and the second seal portion e. Even if the content liquid intrudes into the first seal portion d, the content liquid is retained due to the presence of the space between the first seal portion d and leakage of the liquid from the first seal portion d can be prevented.
The position of the second seal portion e may be any position as long as it is below the first seal portion d.

Next, the embodiment and effects of this embodiment will be described.
The hinge cap of this embodiment is molded with the lid open as shown in FIG. 6 by the molding method described in the first embodiment.
Further, as shown in FIG. 5, the point that the container A is capped with the hinge cap closed is the same as in the first embodiment.

When the hinge cap is closed, the first seal cylinder 42 of the lid body Da forms the first seal portion d at the upper inner circumference of the pouring cylinder 36 of the cap body Ba, and the second seal cylinder 43 forms the outer circumference. A second seal portion e is formed in the vicinity of or in contact with the edge portion 37a of the spout edge portion 37 on the surface, and can be sealed with a double seal.
In particular, in this embodiment, since the spout edge 37 has a downwardly slanted shape, the sealing performance of the second seal portion e is enhanced by the pressure caused by the content liquid caused by dropping or the like. , the impact caused by the content liquid can be suppressed.

In addition, since the pouring port 35 is narrow and elongated in the pouring direction, the outflow amount of the content liquid is suppressed, and smooth pouring can be achieved.
In the present embodiment, the shape of the pouring port 35 is not only circular but also rhomboidal, which is modified by the pouring port edge 37. , a vertically elongated shape, and various other deformed shapes.

In the first and present embodiments, a hinge cap that does not require unplugging has been described, but the present invention can of course also be applied to a hinge cap that requires unplugging using a pull ring or the like.

INDUSTRIAL APPLICABILITY The hinge cap of the present invention can be molded so that the synthetic resin does not wrap around the outside of the film inserted into the mold when forming the hinge portion by insert molding the film, so it is used for the hinge cap. It can be used widely as a hinge cap for various containers because it can widen the selection of synthetic resins.

A container B, Ba cap main body C hinge part D, Da lid body a seal part b temporary seal part c liquid reservoir part d first seal part e second seal part 1 mouth part 2 fitting rib 3 fitting part 4, 34 base wall 5, 35 spout 6, 36 spout tube 6a stepped portion 6b lip portion 7 locking projection 8 lid engaging portion 9 inner cylinder 10 outer peripheral wall 11 engaging projection 12 groove 13 guide projection 14 engagement Recess 16 Film 17 Hinge forming portion 18 Main body covering portion 19 Lid covering portion 20 Top wall 21 Side peripheral wall 22 Seal cylinder 22a Stepped portion 22b Lower seal cylinder 23 Outer cylinder 23a Tip 24 Engaged portion 25 Engaging recess 26 Handle Part 27 Finger Hook 30 Fixed Mold 31 Movable Mold 32 Movable Core 33 Suction Hole 37 Spout Edge 37a Edge 38 Beam 42 First Seal Cylinder 43 Second Seal Cylinder

Claims (5)

A hinge cap comprising a cap body attached to a container and a lid attached to the cap body via a hinge so as to be openable and closable,
The cap body includes a mounting portion to be mounted on the mouth of the container, and recessed grooves formed in a predetermined range at least in the vicinity of both sides of the hinge portion in the circumferential direction from the upper surface of the mounting portion except for the hinge portion side,
The lid has a top wall and a side peripheral wall hanging from the peripheral edge of the top wall,
1. A hinge cap, wherein the hinge portion is formed by an insert-molded film connecting the attachment portion of the cap body and the side peripheral wall of the lid body. 2. The hinge cap according to claim 1, wherein the recessed groove is formed over the entire circumference of the mounting portion except for the side of the hinge portion from the upper surface of the mounting portion. The film is characterized by comprising a main body covering portion covering the cap main body side of the mold, a lid covering portion covering the lid side, and a hinge forming portion between the main body covering portion and the lid covering portion. The hinge cap according to claim 1 or 2. The mounting portion of the cap body includes a lid engaging portion that engages with the side peripheral wall of the lid body, and an outer peripheral wall that extends vertically from the outer peripheral side of the lid engaging portion,
The hinge cap according to any one of claims 1 to 3, wherein the concave groove is a vertical groove of a predetermined depth formed from the upper surface of the outer peripheral wall. The cap body and lid are made of polyethylene terephthalate,
The hinge cap according to any one of claims 1 to 4, wherein the hinge portion is made of polyethylene terephthalate film.

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