JP2001063747A - Hinge cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the visibility of an opening section by expanding the opening angle of an external lid, soften the snapping speed when the lid is closed, and prevent a liquid from being splashed by fixing both ends of a pair of auxiliary bands having a spring action, which are arranged in parallel on both sides of a three-point style snap hinge, to an internal lid and the external lid. SOLUTION: On both sides of a three-point style snap hinge 2, a pair of auxiliary bands 50 having a spring action are arranged in parallel. Then, both the ends of the pair of auxiliary bands 50 are integrally fixed to an internal lid 3 and an external lid 5 at the time of the molding. The auxiliary band 50 has a uniform thickness, and is formed into a bow-shape. The attaching location of the auxiliary band 50 is located at a location being lower by H1=H2 than the attaching location of a thin hinge 26, under an opened state of the external lid 5. Therefore, the opening force of the internal lid 3 becomes larger, and the opening angle of the internal lid 3 becomes larger. Also, by adjusting the length L of the auxiliary band 50, the snapping speed before the external lid 5 is closed is softened, and the trouble of a liquid splashing can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin hinge cap which is fitted to the mouth of a liquid container made of glass or synthetic resin.

[0002]

2. Description of the Related Art FIG. 13 relates to a first example of a conventional stopper type synthetic resin cap. Reference numeral a denotes a cap made of a synthetic resin, and an inner lid b and an outer lid c are integrally provided by a three-point snap hinge d. "e" denotes an inner cylinder which is press-fitted together with the outer cylinder "f" by sandwiching the mouth of the container "g". h
Denotes an engaging convex portion, and i denotes an engaging concave portion. j is a shielding wall and k is a fissure, which is opened by pulling a tearing member 1 such as a pull ring. m is a cylinder. The above three-point snap hinge d
Is composed of a center spring hinge do and a pair of thin hinges dn located on both sides thereof and serving as pivot points.

FIG. 14 shows, for example, utility model registration No. 25780.
No. 42 relates to a second example of the conventional plug-type synthetic resin cap disclosed in Japanese Patent No. 42. This is made of synthetic resin, and is pressed against an inner lid b having a top wall p and a tubular portion covering the outer periphery of the mouth of the container, and an engaging recess i formed on the inner periphery of the mouth of the container and formed inside the tubular portion. An engaging projection h to be engaged, an outer lid c integrally provided on the inner lid b via a three-point snap hinge d, and a part of the top wall p and corresponding to the hinge d A weakening line q formed at a portion to be formed, and a weakening line r formed on one side of the hinge d from the upper end to the lower end of the cylindrical portion, the weakening line r being continuous with the weakening line q, and below the hinge. And a towing portion of a cylindrical portion f formed continuously with the cylindrical portion f corresponding to the other end of the weakening line r and which is towed cantilever outward when the outer lid c is pulled outward. The three-point snap hinge d is located at both sides of the center spring hinge do and serves as a pivot point. It is composed of a pair of thin hinges dn.

[0004] The above-mentioned synthetic resin cap pulls the pull tab l, cuts out the shielding wall j and pulls it out, and the contents can be poured from the injection pipe m. Further, when the container is collected and reused after use of the internal articles of the container, when the outer lid c is gripped and pulled outward, the weakening line formed on the top wall p via the hinge d is formed. q and the weakening line r are torn off.
Still further, if the outer lid c is pulled outward, the force is exerted on the pulling portion below the hinge. Therefore, the vicinity of the traction portion is deformed outward, and the engagement is loosened. In this state,
When the outer lid c is pulled obliquely upward, the engagement between the tubular portion f below the hinge d and the tubular portion near the traction portion connected to the hinge d is loosened, and the tubular portion f is lifted upward. Can be removed with bare hands.

[0005]

In the first conventional example, when the liquid in the container is poured out, the opening angle of the outer lid may not be sufficient. May not be able to be accurately performed because it cannot be seen behind the image. In addition, the outer lid is strongly closed by the snap operation of the center spring hinge do, and a liquid splash may occur. The thin hinge dn is strong against bending,
Thin hinge d that is relatively weak against the force in the tearing direction
Since n is located on both sides, it may be damaged if handled roughly.

Further, in the second conventional example, as described above, the weakened line r is formed from the upper end to the lower end of the cylindrical portion. Therefore, at the time of tapping, that is, when the cap is pressed against the mouth of the container and attached, a force is applied to the line of weakness, and the container is easily broken. Therefore, the fitting must be performed so that the weakening line q is not broken, and the fitting force is weaker than that of a cap having no weakening line. Further, in the second conventional example, when the container is collected and reused, an operation of pulling the outer lid obliquely upward is added. Therefore, the thin hinge dn located on both sides of the three-point snap hinge d is the first hinge. There was a risk of further damage than in the example.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems. The opening angle of the outer lid is enlarged, the closing speed is reduced, and the opening / closing speed and the opening angle of the outer lid by the snap hinge are optimally adjusted. It is an object of the present invention to provide a hinge cap which is made possible and prevents breakage of a thin hinge.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the hinge cap according to the first aspect of the present invention has a fitting portion which is press-fitted to a mouth of a container. A synthetic resin cap comprising an inner lid having a cylindrical portion and an outer lid integrally connected thereto via a three-point snap hinge, wherein the three-point snap hinge comprises a central spring hinge and a central spring hinge. In a hinge cap composed of a pair of thin hinges located on both sides and serving as pivot points,
Both ends of a pair of auxiliary bands having a spring action, which are arranged in parallel on both sides of the point-type snap hinge, are fixed to the inner lid and the outer lid.

The hinge cap according to claim 2 is
A synthetic resin cap including an inner lid having a cylindrical portion having a fitting portion to be press-fitted to the mouth of the container, and an outer lid integrally connected to the inner lid via a three-point snap hinge. The three-point snap hinge is composed of a central spring hinge and a pair of thin hinges located on both sides thereof and serving as pivot points, and the inner surface of the fitting portion is engaged with the mouth of the container. An engaging projection is provided for engaging the recess, and a hinge fixing portion for fixing the three-point snap hinge is provided on a top wall of the inner lid, and a peripheral portion is provided on an inner peripheral side of the hinge fixing portion. A direction weakening portion formed on one side of the hinge fixing portion, a longitudinal weakening line continuous to the circumferential direction weakening portion is formed from an upper end to a lower end of the cylindrical portion. Connect one end of a pair of auxiliary bands arranged in parallel on both sides to the Fixed on both ends of the di-fixing portion, characterized in that to fix the other end to the outer lid.

The hinge cap according to claim 3 is
A synthetic resin cap having an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge, wherein the cylindrical portion is press-fitted to a mouth of a container. A fitting portion to be provided, a flange protruding from a lower end of the fitting portion, and a seal portion continuous to a lower surface of the flange portion, and an inner surface of the fitting portion has a container opening portion. An engagement projection is provided for engaging the engagement recess, and the flange has a hinge fixing portion for fixing the hinge, and a circumferential flange weakening portion is provided on an inner peripheral side of the hinge fixing portion. Is formed on both sides of the hinge fixing portion, a radial flange weakening portion continuous with the circumferential flange weakening portion is formed, and the seal portion has a longitudinal weakening line continuous with the radial flange weakening portion. A circumferential weakening line is formed, and the three-point snap hinge further includes a central spring hinge and a pair of pivot fulcrums located on both sides thereof. The three-point snap hinge has a pair of auxiliary bands, one end of which is fixed to both ends of the hinge fixing portion, and the other end is fixed to the outer lid. .

Further, the hinge cap according to claim 4 is
A synthetic resin cap having an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge, wherein the cylindrical portion is press-fitted to a mouth of a container. A fitting portion to be provided, a flange protruding from a lower end of the fitting portion, and a seal portion continuous to a lower surface of the flange portion, and an inner surface of the fitting portion has a container opening portion. An engagement projection is provided for engaging the engagement recess, and the flange has a hinge fixing portion for fixing the hinge, and a radial flange weakening portion is formed on one side of the hinge fixing portion. On the inner peripheral side of the hinge fixing portion, a circumferential flange weakening portion continuous to the radial flange weakening portion and a circumferential flange weakening line continuous to the circumferential flange weakening portion are formed, and the seal portion is formed. A longitudinal weakening line that is continuous with the radial flange weakening portion is formed, and the three-point snap hinge further includes a central spring hinge and both sides thereof. A pair of thin hinges that are positioned and function as pivot points, and one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing part, and the other end is fixed. It is characterized by being fixed to the outer lid.

The hinge cap according to claim 5 is
A ring-shaped convex portion is formed on the inner surface of the outer lid so as to come into contact with the outer surface of the fitting portion when the inner lid is attached to the container mouth.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventor cannot prevent the breakage of a thin hinge with only a three-point snap hinge, and it is difficult to optimally adjust the opening angle and closing speed. As a result of intensive research, it was found that a pair of auxiliary bands should be arranged in parallel on both sides of the three-point snap hinge.

Further, the present inventor believes that the formation of the weakening line over the entire length of the cylindrical portion has the origin of the problem, and to form the weakening line without impairing the function of the inner lid, We considered what to do.

[0015] As a result, the cylindrical portion is formed at the lower end of the fitting portion to be press-fitted into the mouth portion of the container, and
It is composed of a flange connected to the outer lid via a hinge, and a cylindrical seal portion that is continuous with the flange, and the fitting portion is not provided with a weakening line, and only the flange and the seal portion are provided. It turns out that it is only necessary to provide a weakening line.

That is, according to this structure, since a strong pressing force can be applied to the fitting portion having no weakened line, the fitting force can be increased. Also, the fitting part is
Since it only occupies the upper end side of the tubular portion, it can be easily removed from the mouth by pulling the outer lid at the time of sorting and collecting.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The hinge cap 1 includes an inner lid 3, an outer lid 5, and a snap hinge 2 connecting the lids 3,5.

The inner lid 3 has a filling cylinder 6 and a top wall 7 attached to the filling cylinder 6.
And a cylindrical portion 8 connected via the. The injection tube 6 is provided with a blocking wall 11 for blocking the flow of the fluid. The blocking wall 11 is provided with an endless fissure 12 and a pull ring 13, and the pull ring 13 is disposed inside the fissure 12.

On the top wall 7, an engaging cylinder 9 formed concentrically with the injection cylinder 6 is provided upright. This engaging cylinder 9 is
The engagement cylinder 9 is formed to have a larger diameter, and is engaged with the projection 10 of the outer lid 5 when the lid is closed. The distal end portion of the engagement cylinder 9 extends outward, and its end surface 9a is a tapered surface inclined toward the outer periphery of the cylinder portion 8.

The cylindrical portion 8 includes a fitting portion 15, a flange portion 16 formed at a lower end of the fitting portion 15, and a lower surface 16 a of the flange portion 16.
And a sealing portion 17 which is continuous with the sealing member 17. The fitting portion 15
Is press-fitted into the mouth 21 of the container 20, but the mouth 2
1 is sandwiched between the fitting portion 15 and the inner cylinder 23. An engagement projection 16b is provided on the inner surface of the lower end of the fitting portion 15. The arrangement position of the projection 16b is appropriately selected as necessary, for example, the inner surface of the flange 16 is selected. .

The fitting portion 15 and the flange portion 16 are provided concentrically, and both 15, 16 are stepped. The outer lid 5 comes into contact with the upper surface of the flange 16 when the lid is closed.

The snap hinge 2 is a central spring hinge 25.
And a pair of thin hinges 26 located on both sides thereof and serving as pivot points, so that the outer lid 5 is released and the outer lid 5 does not hang down when the contents in the container 20 are poured out. It has become. A pair of auxiliary bands 50 having a spring action are arranged in parallel on both sides of the three-point snap hinge 2, and both ends of the pair of auxiliary bands 50 are integrally fixed to the inner lid 3 and the outer lid 5 at the time of molding. ing.

FIG. 3 is an enlarged view taken on line III-III of FIG. As shown in the figure, the auxiliary band 50 has a uniform wall thickness and has an arcuate shape. The mounting position of the auxiliary band 50 is higher than the mounting position of the thin hinge 26 when the outer lid is open.
= H2. Therefore, since the opening force of the inner lid 3 is increased, the opening angle of the inner lid 3 is increased.
Further, by adjusting the length L of the auxiliary band 50, the snap speed before the outer lid 5 is closed can be reduced, and the problem of liquid splash can be eliminated. In addition, auxiliary band 5
In the case of 0, the outer side is cut off in an arc shape, thereby adjusting the spring property and preventing the injury of the fingertip.

When the lid is closed, the outer lid 5 has a projection 10 which is engaged with the distal end portion 9a of the engagement cylinder, and an opening end surface 3 which contacts the flange portion 16.
2 is provided. A knob 33 is provided at the tip of the opening end face 32. On the outer periphery of the lower surface 16a of the flange portion 16, a straight cylindrical seal portion 1 having a smaller diameter than the outer diameter of the flange portion 16 is provided.
7 are continuous. The seal portion 17 is provided with the fitting portion 15.
And it is easy to deform because it is formed thinner than the flange portion 16.

Next, the operation when the cap 1 is mounted on the container 20 filled with contents will be described. When the cap 1 is put on the opening 21 of the container 20 and pressed, the cylindrical portion 8 is fitted to the opening 21, and the engaging projection 16 b presses and engages with the engaging recess 21 a of the opening 21, and the sealing portion 17 is in contact with the outer periphery of the mouth 21.

When taking out the contents from the container 20, a finger is put on the pull ring 13 and the shielding wall 11 is removed in advance by pulling up. At the time of use, the outer lid 5 is pushed up by a fingertip to be opened by the spring force of the spring hinge 25. In this embodiment, the opening angle is increased by the spring force of the pair of auxiliary bands 50 having a spring action, and the opening angle is increased. Visibility is improved.

When the contents are taken out and the outer lid 5 is closed, the outer lid 5 is closed by the fingertip and the spring force of the spring hinge 25, but the presence of the auxiliary band 50 acts to suppress the spring force of the spring hinge 25, and the closing action is performed. The snap speed is alleviated and liquid splash trouble is eliminated.

A second embodiment of the present invention will be described with reference to FIGS. The same or corresponding portions as in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. FIGS. 4 to 6 show a second example of the conventional stopper type synthetic resin cap (FIG. 1).
4 to 15), but the hinge is prevented from being broken at the time of collection.

That is, the inner lid 3 having the cylindrical portion 8 having the fitting portion 15 which is press-fitted into the mouth portion 21 of the container, and the outer lid integrally connected to the inner lid 3 via the three-point snap hinge 2. A hinge cap 1 made of synthetic resin having a lid 5, wherein the three-point snap hinge is a central spring hinge 25 and a pair of thin hinges 26 located on both sides thereof and serving as pivot points.
An engaging projection 16b is provided on the inner surface of the fitting portion 15 to be engaged with the engaging recess 21a at the mouth of the container, and the top wall 7 of the inner lid 3 is provided with the three-point type. A hinge fixing portion 28 for fixing the snap hinge 2 is provided, and a circumferential weakening portion (slit) is provided on the inner peripheral side of the hinge fixing portion 28.
On one side of the hinge fixing portion 28, a longitudinal weakening line 37 continuous with the circumferential weakening portion (slit) 31 is formed from the upper end to the lower end of the cylindrical portion 8. As described above, the hinge cap of the present invention has a configuration similar to that of the conventionally known second example, but differs in the following points.

In the second embodiment of the present invention, one end 50a of a pair of auxiliary bands 50 having a certain thickness and arranged in parallel on both sides of the three-point snap hinge d is attached to both ends of the hinge fixing portion 28. , Fixed together during molding, the other end 50b
Is fixed to the outer lid 5, and the auxiliary band 50 does not require a special spring property because it seeks only the function of recycling. However, it is necessary to attach one end of the auxiliary band to the tear starting point. Thereby, the tensile force is concentrated, and the tearing is easily started. FIG.
FIG. 6 is an enlarged view taken on line VI-VI of FIG. 5. In the figure, reference numeral 31 denotes a notch portion corresponding to a circumferential weakening portion. The mounting position of the auxiliary band 50 is at the same height as the mounting position of the three-point snap hinge 2. The auxiliary band 50 does not require a spring action, but may have a spring action, in which case,
The operation and effect described in the first embodiment can also be expected.

FIG. 14 shows a second embodiment of the present invention.
Is different from the known example shown in FIG.
That is, in the known example shown in FIG. 14, the vertical weakening line continuous to the circumferential weakening portion is formed linearly from the upper end to the lower end of the cylindrical portion. However, in the second embodiment of the present invention, The weakening line 37 descends vertically from the upper end of the cylindrical portion 8 by a slight distance as indicated by 37a, immediately tears the direction as indicated by 37b, turns by 45 degrees in the traction direction, and obliquely moves the cylindrical portion 8 downward. It is formed to the lower end. This makes it easier to start tearing in the circumferential direction.

A third embodiment of the present invention will be described with reference to FIGS. The same or corresponding portions as in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

On both sides of the hinge fixing portion 28 of the flange portion 16,
Radial flange weakening portions 29 and 30 are formed, and a slit 31 as a circumferential flange weakening portion is provided between the hinge fixing portion 28 and the fitting portion 15. The radial flange weakening portions 29 and 30 have a groove shape, but the shape and the like are appropriately selected as necessary. For example, the radial flange weakening portions 29 and 30 are formed in a portion protruding from the fitting portion 15 in the radial direction. The slit 31 is continuous with the radial flange weakening portions 29, 30.

The seal portion 17 includes the radial flange weakening portion 2.
A circumferential weakening line 36 and a longitudinal weakening line 3 that are continuous with 9, 30
7 are provided. Here, the flange weakened line portion refers to a linear portion that is weaker than other portions, but the shape or the like is freely selected, and for example, a groove or a perforation is adopted.

The weakening line 36 is a circumferential weakening line that is continuous with the radial flange weakening portion 29, and includes the flange 16 and the seal 17.
Is formed between. The length (center angle θ) of the weakening line 36 is 270 degrees, and the center angle is appropriately selected as needed.

The weakening line 37 is a longitudinal weakening line, is continuous with the radial flange weakening portion 30, and reaches the lower end 17a of the seal portion 17. This weakening line 37 is an axial weakening line 37a.
And an inclination weakening line 37b inclined toward the spring hinge 25 side. (See Fig. 10)

One end of a pair of auxiliary bands 50 having a spring action arranged in parallel on both sides of the three-point snap hinge is integrally fixed to both ends of the hinge fixing portion (fixing base) 28 at the time of molding, and the other end. Are fixed to the outer lid 5.

FIG. 9 is an enlarged view taken on line IX-IX of FIG.
As shown in the figure, the auxiliary band 50 has a uniform thickness,
It has a bow shape. The mounting position of the auxiliary band is lower than the mounting position of the thin hinge 26 by H1 = H2 when the outer lid is open. Therefore, since the opening force of the inner lid 3 is increased, the opening angle of the inner lid 3 is increased. Since one end of the auxiliary band 50 is fixed to both ends of the hinge fixing portion (fixed pedestal) 28, even if the auxiliary band 50 is located at a position lower than the tearing start slit 31, the pulling force is concentrated and the tearing is easily started. . Further, by adjusting the length L of the auxiliary band 50, the snap speed before the outer lid 5 is closed can be reduced, and the problem of liquid splash can be eliminated.
Further, the outer side of the auxiliary band 50 is cut out in an arc shape, so that the spring property can be adjusted and the injury of the fingertip can be prevented. The auxiliary band 50 has a spring function. However, when only the function of recycling is required, the auxiliary band 50 need not have the spring function.

A seal projection 40 is provided at the lower end 17 a of the seal portion 17, and the seal projection 40 is engaged with the concave portion 41 of the mouth 21. Therefore, since there is no risk of mischief by inserting a finger, wire, or the like from the lower end 17a of the seal portion, it is possible to enhance the damper evidence (opening function).

The outer diameter of the flange 16 is formed to be larger than the outer diameter of the seal 17, and the flange 16 protrudes outward from the seal 17 by an interval SL. The cap 1 can be removed by hooking the bottle opener.

The operation of this embodiment will be described. First,
First, a case where the cap 1 is attached to the container 20 will be described. When the cap 1 is put on the mouth portion 21 of the container 20 and pressed, the cylindrical portion 8 is fitted to the mouth portion 21, and the engagement projection 16 b
Are pressed into engagement with the engagement recesses 21a of the mouth 21 and
7 contacts the outer periphery of the mouth 21.

At this time, a large force is applied to the fitting portion 15, but since no weakening line is formed in the fitting portion 15, there is no need to reduce the fitting force. In addition, the sealing portion 1
Although the weakening lines 36 and 37 are formed in the seal 7, since the lower end 17 a of the seal portion 17 is only in contact with the outer periphery of the opening 21, the weakening lines 36 and 37 are not easily cut.

Next, the case where the cap 1 is removed to separate and collect will be described. The outer lid 5 is opened by placing a finger on the knob 33 of the outer lid 5 and pushing upward to open the outer lid 5. The outer lid 5 is gripped by hand and pulled in the direction of arrow A1, whereby the radial flange weakening lines 29 and 30 are cut off. At this time, since the weakened portions 29 and 30 are continuous with the slit 31, concentrated stress is applied to the connection base of the weakened portions 29 and 30 and the slit 31. Therefore, the both weakened portions 29 and 30 are easily torn off.

When the outer lid 5 is further pulled in the same direction, the longitudinal weakening line 37 of the seal portion 17 is cut. Arrow A on the outer lid 5
When pulled in five directions, the starting end of the circumferential weakening line 36 starts to be cut, and the seal portion 17 is cut off along the outer periphery of the flange portion 17 in the circumferential direction.

When the weakening line 36 is cut to the end, only the engaging projection 16 a of the fitting portion 15 is engaged with the opening 21 of the container 20. Therefore, only by pulling the outer lid 5 upward, the engaging projection 15a comes off the mouth 21 and the entire cap 1 can be easily removed.

In the hinge cap according to the fourth aspect, a radial flange weakening portion 30 is formed on one side of the hinge fixing portion 28, and the radial flange weakening portion 30 is formed on the inner peripheral side of the hinge fixing portion 28. Are formed, and a circumferential weakening line 36 continuous with the circumferential brim weakening portion 31 is formed,
The seal portion 17 is the same as the hinge cap according to claim 3 except that a longitudinal weakening line 37 that is continuous with the radial flange weakening portion 30 is formed. Even in this case, substantially the same operation and effect as the above embodiment can be obtained.

The hinge cap according to the fifth aspect has the structure shown in FIG.
As shown in FIG. 1, a ring-shaped convex portion 51 is formed on the inner surface of the outer lid 5. Before the cap 1 is plugged into the mouth 21 of the container, as shown in FIG.
Although it is away from the side surface, when the cap 1 is plugged into the mouth portion 21, the fitting portion 15 expands, so that the ring-shaped convex portion 51 comes into pressure contact with the side surface of the inner lid 3 as shown in FIG. 12. , To maintain the sealed state. Note that the cap 1 is attached to the mouth 21 of the container.
Even if the ring-shaped convex portion 51 is brought into contact with the side surface of the inner lid 3 before the stopper is attached, a good sealing state can be maintained by swelling entirely by elastic deformation. In this way, after filling the contents at a high temperature, the cap 1 is plugged, and in a filling line that is cooled with shower water, suction of water into the shower water caused by a pressure difference between the inside and outside of the cap during cooling is prevented. Can be.

[0048]

Since the present invention is configured as described above, it has the following effects.

In the hinge cap according to the first aspect of the present invention, a pair of auxiliary bands having a spring action, which are arranged in parallel on both sides of a three-point snap hinge, have both ends fixed to the inner lid and the outer lid. The opening angle of the outer lid is increased, and the visibility of the opening is improved. Furthermore, at the time of closing the lid, the function of suppressing the spring force of the spring hinge works, the snap speed at the time of closing is reduced, and the trouble of liquid splash is eliminated.

In the hinge cap according to the second aspect of the present invention, a circumferential weakening portion is provided on the inner peripheral side of the hinge fixing portion, and a longitudinal weakening line continuous to the circumferential weakening portion is provided on one side of the hinge fixing portion. In the formed hinge cap, one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to the outer lid. It can reinforce weak thin hinges, concentrate the pulling force during collection, and easily initiate tearing.

In the hinge cap according to the third and fourth aspects of the present invention, the cylindrical portion is divided into a fitting portion and a sealing portion, and the flange is weakened. However, the line of weakness does not tear off. Therefore, a cap having a large fitting force can be obtained. Further, one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing part, and the other end is fixed to the outer lid. Is increased, the visibility of the opening is improved, and at the time of closing the lid, the action of suppressing the spring force of the spring hinge works, the snap speed at the time of closing is reduced, and troubles of liquid splash are eliminated. In addition, we strengthen thin hinge with weak tear strength,
At the time of recovery, the pulling force can be concentrated and the tearing can be easily started.

In the hinge cap according to the fifth aspect of the present invention, a ring-shaped convex portion is formed on the inner surface of the outer lid so as to come into contact with the outer surface of the fitting portion when the inner lid is attached to the opening of the container. In a filling line cooled with shower water, suction of shower water caused by a pressure difference between the inside and outside of the cap during cooling can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a lid is opened according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a view taken along line III-III in FIG. 1;

FIG. 4 is a side view showing the opened state of the second embodiment of the present invention.

FIG. 5 is a plan view showing the opened state of the second embodiment of the present invention.

FIG. 6 is a view taken along line VI-VI of FIG. 5;

FIG. 7 is a plan view showing a third embodiment of the present invention in an open state;

8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is a view taken on line IX-IX of FIG. 7;

FIG. 10 is a front view showing a closed state of the third embodiment of the present invention.

FIG. 11 is a sectional view showing a closed state of the hinge cap according to claim 5;

FIG. 12 is a sectional view showing a state in which the hinge cap according to claim 5 is attached to a container.

FIG. 13 is a side sectional view showing a first example of the related art in an open state.

FIG. 14 is a perspective view showing a second example of the related art in an open state.

FIG. 15 is a side sectional view showing a second example of the related art in an open state.

[Explanation of symbols]

 Reference Signs List 1 (hinge) cap 2 snap hinge 3 middle lid 5 outer lid 6 injection cylinder 7 top wall 8 cylindrical part 9 engaging cylinder 10 projection 11 blocking wall 12 crack groove 13 pull ring 15 fitting part 16 flange part 16 16a lower surface 16b engaging Convex part 17 Seal part 17a Seal part lower end 20 Container 21 Mouth 21a Engagement concave part 23 Inner cylinder 25 Spring hinge 26 Thin hinge 28 Hinge fixing part 29 Radial flange weakening part 30 Radial flange weakening part 31 Circumferential (flange) weakening part (Slit) 32 Open end face part 33 Knob part 36 Circumferential weakening line 37 Vertical weakening line 37a Axial weakening line 37b Inclined weakening line 40 Seal protrusion 41 Depression 50 Auxiliary band 51 Ring-shaped protrusion

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Takashi Yoshida 53-family Terado, Koryo-cho, Kitakatsuragi-gun, Nara Prefecture F-term (reference) 3M084 AA24 AA32 AB01 BA03 CA01 CB01 CB02 CB04 CC03 DA01 DB01 DB02 DB13 DC03 FA03 FA09 FC07 GA06 GB06 GB08 GB12 KA16 KB01 LA03 LA18 LB02 LB07

Claims (5)

[Claims] 1. An inner lid having a cylindrical portion having a fitting portion to be press-fitted into a mouth portion of a container, and an outer lid integrally connected to the inner lid via a three-point snap hinge. The three-point snap hinge is a synthetic resin cap, wherein the three-point snap hinge is a hinge cap including a central spring hinge and a pair of thin hinges located on both sides thereof and serving as pivot points. A hinge cap, wherein both ends of a pair of auxiliary bands having a spring action arranged in parallel on both sides are fixed to an inner lid and an outer lid. 2. An inner lid having a cylindrical portion provided with a fitting portion to be press-fitted into a mouth portion of a container, and an outer lid integrally connected to the inner lid via a three-point snap hinge. A synthetic resin cap, wherein the three-point snap hinge is composed of a central spring hinge and a pair of thin hinges located on both sides thereof and serving as pivot points; An engagement projection that engages with the engagement recess of the mouth is provided, and a hinge fixing portion for fixing the three-point snap hinge is provided on the top wall of the inner lid. In a hinge cap, a circumferential weakening portion is formed on a circumferential side, and a longitudinal weakening line continuous to the circumferential weakening portion is formed on one side of the hinge fixing portion from an upper end to a lower end of the cylindrical portion. A pair of auxiliary bands arranged in parallel on both sides of the point snap hinge One end was fixed to both ends of the hinge fixing portion, a hinge cap, characterized in that to fix the other end to the outer lid. 3. A synthetic resin cap having an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge, wherein the cylindrical portion is a container opening. A fitting portion press-fitted to the portion, a flange protruding from a lower end of the fitting portion, and a seal portion continuous to a lower surface of the flange portion, and an inner surface of the fitting portion has An engagement projection is provided for engagement with an engagement recess of the container mouth, and the flange has a hinge fixing portion for fixing the hinge, and an inner peripheral side of the hinge fixing portion includes: A circumferential flange weakening portion is formed, a radial flange weakening portion continuous to the circumferential flange weakening portion is formed on both sides of the hinge fixing portion, and the seal portion is continuous with the radial flange weakening portion. A vertical weakening line and a circumferential weakening line are formed, and the three-point snap hinge is located at a center spring hinge and on both sides thereof to be pivotally supported. A pair of thin hinges, and one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to the outer lid. A hinge cap. 4. A synthetic resin cap having an inner lid having a cylindrical portion and an outer lid connected to the inner lid via a three-point snap hinge, wherein the cylindrical portion has a mouth of a container. A fitting portion press-fitted to the portion, a flange protruding from a lower end of the fitting portion, and a seal portion continuous to a lower surface of the flange portion, and an inner surface of the fitting portion has An engaging projection is provided for engaging the engaging recess of the container mouth, and the flange has a hinge fixing portion for fixing the hinge, and a radial flange is provided on one side of the hinge fixing portion. A weakened portion is formed, and a circumferential flange weakened portion continuous with the radial flange weakened portion and a circumferential flange weakened line continuous with the circumferential flange weakened portion are formed on an inner peripheral side of the hinge fixing portion. In the seal portion,
A longitudinal weakening line continuous to the radial flange weakening portion is formed, and the three-point snap hinge is constituted by a central spring hinge and a pair of thin hinges located on both sides thereof and serving as a rotation fulcrum, A hinge cap, wherein one end of a pair of auxiliary bands arranged in parallel on both sides of the three-point snap hinge is fixed to both ends of the hinge fixing portion, and the other end is fixed to an outer lid. 5. The outer cover according to claim 1, wherein a ring-shaped convex portion is formed on the inner surface of the outer cover so as to contact the outer surface of the fitting portion when the inner cover is mounted on the container mouth. Hinge cap.