JP5752076B2 - Synthetic resin hinge cap - Google Patents

Description

  According to the present invention, there is no pull ring that can open a spout sealed by a cut-out portion surrounded by a weakened portion by opening the hinge cap, and can discharge the content liquid without removing the cap from the container. The present invention relates to a hinge cap made of synthetic resin.

  Conventionally, a cap with a spout protruding in a nozzle shape is often used as a cap of a liquid detergent or sports beverage filling bottle. This kind of cap is generally formed by two or more parts of the cap body and the upper lid. However, in the case of a cap that opens by breaking the weakened portion of the spout, the upper lid is removed when the cap is opened, and the weakened portion is enclosed. Two operations of removing the broken cut portion are required. Further, in order to remove the weakened portion, a pull ring or a knob is required. However, when the opening is small, it is difficult to pick and the opening is difficult, and the removed opening cut piece has a defect of becoming dust.

  Conventionally, as a cap that does not cause the problem, there has been proposed a method of removing a cutout portion surrounded by a weakened portion in conjunction with opening of an upper lid without providing a pull ring (see Patent Documents 1 and 2). For example, in Patent Document 1, an engagement protrusion that extends in the horizontal direction from the lower end of the hanging piece of the upper lid is provided, and the lower lid is surrounded by a weakened portion that is an opening of the spout of the lower lid. Engagement protrusions that have hardened at room temperature when the upper lid is opened by engaging the engagement protrusions of the lower and upper lids with the resin cap in a state where the resin cap is soft and the resin is soft at a high temperature. The weakened portion is broken by the engagement between the pieces, and the spout is opened together with the opening of the upper lid. Moreover, what was described in patent document 2 is a tearing tool provided by dropping a seal plate of a planned opening portion surrounded by a weakened portion in a dispensing cylinder of a cap body on the inner surface of a top plate portion of an upper lid. The lower end of the seal plate and the peripheral edge of the seal plate are welded together and connected to the upper lid.

  In these conventional devices, the cut portion surrounded by the weakened portion is pulled up to the upper lid side with the rotation of the hinge lid, so that the cut portion is cut and opened, but the hinge lid is centered on the hinge portion. Therefore, the cut-out part is pulled in an oblique direction, and the opening force is reduced compared to the case with a pull ring that pulls upward with a pull ring, the weakened part becomes difficult to break, and the unplugging property is poor. There are drawbacks. This tendency is particularly large when the spout is located at the tip of a small-diameter spout nozzle. In addition, since strong tension acts between the top wall of the hinge cap and the cut-out part when opening, the top wall and the cut-out part must be firmly connected to withstand it, and the connection mechanism becomes complicated and the cap is molded. There are also problems such as poor performance, impeding practical application.

JP 10-338253 A JP 2005-289389 A

  Therefore, the present invention aims to solve the above-mentioned problems in a hinge cap without a pull ring in which a spout can be opened by the opening operation of the conventional hinge lid, and improves the opening performance by reducing the opening load. It is an object of the present invention to provide a synthetic resin hinge cap that can easily open the spout in one operation even with a hinge cap having a spout nozzle that protrudes with a small diameter of the spout.

  As a result of various studies conducted by the present inventor to solve the above-mentioned problems, the cause of the above-described problems of the conventional hinge cap is that the pull-ring is cut while adjusting the pulling direction of the pull ring with a finger. However, when the hinge cap is opened by the opening operation of the hinge cap, the upper lid rotates around the hinge, so that the pulling direction of the cut portion acts in a direction inclined with the cut portion panel surface, so that the tearing force is The weak point and the distance between the tearing part and the center of rotation of the lid (hinge position) is close, and the force acting on the cut part is affected by the coupling force between the cut part and the hinge cap. Since a relatively soft resin is used, it can be seen that the resin stretches when opened and the tension does not act effectively on the weakened part. It was.

Accordingly, the present invention has been achieved as a result of further research based on the above knowledge, and the invention of claim 1 of the present application that solves the above problems is formed integrally with a skirt wall and a hinge piece that engage with a bottle mouth. In the synthetic resin hinge cap comprising a cap body comprising an upper lid and an inner stopper for closing the bottle mouth, the inner stopper comprises an inner stopper body fitted to the bottle mouth top and an annular top of the inner stopper body. It consists of a pouring nozzle that protrudes upward from the inner end of the wall, and a cutout portion that closes the bottle mouth surrounded by a breakable weakening portion is formed on the upper inner peripheral surface of the pouring nozzle, A columnar locking column is formed on the upper surface at an eccentric position opposite to the hinge portion of the upper lid, and an engaged means engaging with the locking column is formed on the inner surface of the top wall of the upper lid. Become
The cut-out portion is divided into a locking strut side thick portion, an intermediate thin portion, and a hinge side thick portion, and the locking strut is erected on the locking strut side thick portion. The thickness from the thick part is connected to the intermediate thin part thinner than the locking strut side thick part through the step, and the hinge side thickness is thicker than the intermediate thin part from the intermediate thin part through the step. This is a synthetic resin hinge cap characterized in that the portions are connected.

The invention according to claim 2 is the synthetic resin hinge cap according to claim 1, wherein the step between the engaging strut-side thick portion and the intermediate thin portion, and the intermediate thin portion and the hinge-side thick portion. The step between them is formed across the cutout portion so as to be substantially parallel to the hinge line of the upper lid.
According to a third aspect of the present invention, in the synthetic resin hinge cap according to the first or second aspect, the locking post has a locking head whose top portion bulges, and the engaged means is a top cover. A locking cylinder that hangs down from the top surface and engages with the locking head, and has a locking portion that locks the lower surface of the locking head at the lower end of the locking cylinder; And a lower end surface of the locking head, a space is formed in which the locking portion can slide along the locking support until the upper lid and the container main body are disengaged in the initial stage of opening the upper lid. It is characterized by this.
According to a fourth aspect of the present invention, in the synthetic resin hinge cap according to any one of the first to third aspects of the present invention, the inner stopper has the engagement strut formed on the inner stopper and the engaged strut formed on the upper lid. Positioning means for positioning with respect to the coupling means and fitting the inner plug to the cap body is formed.

  Further, the invention according to claim 5, which is the second invention, is a skirt wall engaging with the bottle mouth, an annular top wall projecting inward from the upper end of the skirt wall, and projecting upward from the inner end of the annular top wall. In a synthetic resin hinge cap composed of a cap body made of a pouring nozzle and an upper lid formed integrally with the cap body via a hinge piece, a weakened portion that can be broken on the upper inner peripheral surface of the pouring nozzle A cutout portion is formed to close the bottle mouth surrounded by a column, and a column-shaped locking post protrudes from the upper surface of the cutout portion at an eccentric position opposite to the hinge side of the upper lid, and is formed on the inner surface of the top wall of the upper lid. Is formed with an engaged means that engages with the locking strut, and the cutout portion is divided into a locking strut side thick part, an intermediate thin part, and a hinge side thick part, The locking column is erected on the column side thick part, and the locking column side The thickness from the thick part is connected to the intermediate thin part thinner than the locking strut side thick part through the step, and the hinge side thickness is thicker than the intermediate thin part from the intermediate thin part through the step. This is a synthetic resin hinge cap characterized in that the portions are connected.

  According to the first aspect of the present invention, since the locking position between the cut-out portion and the upper lid is eccentrically provided at a position far from the hinge portion, the inclination of the acting direction of the tension on the locking strut at the time of the initial break can be reduced. The tension can be effectively transmitted to the cut portion, and the vicinity of the standing position of the locking post of the cut portion is made thick so that the tension can be effectively applied to the weakened portion without stretching, Since the intermediate portion located on the hinge side of the cut-out portion is an intermediate thin portion, the intermediate thin portion gradually bends as the upper lid rotates after the initial breakage, and the trajectory of the direction of action on the fracture portion of the tension is inclined to the engaged means. The tension can be effectively applied to the weakened portion even with the hinge cap. And the vicinity of the weakening line on the hinge side, which is the part where the breaking force acts intensively near the completion of the breaking of the cut-off part, is the hinge-side thickened part, so that the vicinity of the weakening line is extended and cannot be easily broken Inconveniences such as the occurrence of whiskers on the fracture surface can be eliminated, and the opening can be satisfactorily performed.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the thin part of the cut-out part covers the stepped part between the locking post side thick part, the intermediate thin part, and the hinge side thick part. Since it is formed substantially parallel to the hinge line, the bending direction of the cutout portion associated with the opening can be stabilized, and the tension can be more effectively applied to the weakened portion.
According to the invention of claim 3, the locking column and the locking cylinder are further locked until the locking portion of the locking cylinder is locked until the engagement between the upper lid and the container body is released at the initial opening of the upper lid. Since the relationship is such that it can slide along the support column, the opening force of the upper lid can be concentrated on the breakage of the weakened portion at the time of the initial breakage of the weakened portion, and the initial load can be reduced by reducing the opening load.
According to the invention of claim 4, since the positioning means is formed on the inner plug, even if the locking post and the locking cylinder are formed eccentrically, both can be reliably engaged and easy to assemble. It becomes.
According to the invention of claim 5, the inner plug and the cap main body of the invention of claim 1 are integrally formed to shorten the molding process and to reduce the molding cost.

(A) is sectional drawing of the synthetic resin hinge cap which concerns on embodiment of this invention, (b) is the principal part enlarged view. The cap main body of the synthetic resin hinge cap which concerns on embodiment of this invention is shown, (a) is a left view, (b) is a front view, (c) is a right view, (d) is a rear view, (e ) Is a plan view, and (f) is a bottom view. It is sectional drawing of the cap main body shown in FIG. 2, (a) is AA sectional drawing in FIG.2 (e), (b) is the BB sectional drawing, (c) is CC in (a). It is sectional drawing. The inside plug of the synthetic resin hinge cap which concerns on embodiment of this invention is shown, (a) is a left view, (b) is a front view, (c) is a top view, (d) is a bottom view, (e) FIG. 3D is a DD cross-sectional view in (c). It is an enlarged view of the cutout part in this embodiment, (a) is sectional drawing, (b) is a bottom view. (A)-(e) shows the assembly process of the hinge cap made from a synthetic resin which concerns on embodiment of this invention by an assembly jig, (f) is a top view of an assembly jig. (A)-(g) is sectional drawing which shows the opening procedure in the bottle container equipped with the synthetic resin hinge cap concerning embodiment of this invention. It is sectional drawing which shows the usage pattern of the synthetic resin hinge caps of this embodiment, (a) is an unopened state, (b) is a state when the contents are poured out, (c) is a resealed state after opening. Each is shown. It is sectional drawing of the synthetic resin hinge cap which consists of one piece which concerns on other embodiment of this invention.

Hereinafter, a synthetic resin hinge cap (hereinafter simply referred to as a hinge cap) according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1A is a cross-sectional view of a hinge cap according to an embodiment of the present invention. The hinge cap 1 of the present embodiment is provided with a pouring nozzle that is molded from a relatively soft synthetic resin such as polypropylene or polyethylene, and that protrudes into a small-diameter nozzle that is attached to a bottle and that is easily sized. It is a hinge cap so that the contents can be drunk directly. As shown in FIGS. 7 and 8, which will be described later, by opening the upper lid, the weakened portion formed at the tip of the dispensing nozzle is broken and opened. Can be resealed by closing the top lid, and can be opened and closed with one touch without removing the top lid after initial opening, for example, can be held with one hand during sports to open, drink and reseal, suitable for sports drinks, etc. It is a synthetic resin cap. However, the hinge cap of the present embodiment is not limited to sports drinks, and other drinks and seasonings are not limited.

The hinge cap of the embodiment shown in FIG. 1 is formed from two pieces of a cap main body 2 and an inner plug 3 and is assembled integrally.
The cap body 2 has an outer surface shown in FIG. 2 and a cross-section shown in FIG. 3, and a skirt wall 10 that is screwed into the mouth of the bottle container, and a middle plug that will be described later is poured above the skirt wall. A cup-shaped upper lid 20 that covers the nozzle is integrally formed via a hinge piece. At the upper end of the skirt wall 10, a cylindrical wall 13 having a predetermined height for fitting the inner plug extending inwardly extends, and the upper end of the cylindrical wall 13 is bent into an inner flange shape to be engaged with a locking flange of the inner plug described later. Thus, an annular locking portion 14 for locking the axial separation is formed. An upper lid is provided on the annular locking portion 14 so as to be connected. The connecting portion between the cap body 2 and the upper lid 20 is composed of a hinge portion 21 and a second tamper evidence band 27 as clearly shown in FIGS. 2 and 3. As shown in FIGS. 2D and 3A, the hinge portion 21 has a hinge piece 22 made of a pair of thin pieces with a predetermined distance between the upper end of the annular locking portion 14 and the lower end of the upper lid, As shown in FIG. 7 (g), an unsealing holding and locking means is formed for maintaining a substantially horizontal state with the upper lid being opened between the hinge pieces. The unsealing holding means protrudes from the upper end of the annular locking portion 14, and the outer peripheral edge of the upper end surface protrudes outward in the radial direction from the pair of hinge pieces 22, 22 (see FIG. 3B). And a thick-walled upper lid-side holding piece 25 protruding in the axial direction from the lower end of the upper lid are arranged to face each other with a predetermined gap. As shown in FIG. 6, the length of the hinge piece and the gap between the holding pieces are such that when the lid is opened from the sealed state, the hinge pieces 22, 22 are inclined outward so that the outside of the upper lid holding piece 25 The upper edge of the upper cover side holding piece extends to the maximum length by rotating the upper cover upward while the peripheral edge or the upper outer periphery of the lower end of the upper cover hits the convex line 23 and the hinge piece extends while the hinge piece extends as a fulcrum. When the engagement position is exceeded, the tension acts in the opposite direction, and the outer peripheral surface 26 of the upper lid holding piece 25 hits the outer peripheral surface of the skirt wall as shown in FIGS. 7 (g) and 8 (b) by click motion. It is formed so that the state can be maintained.

The second tamper evident band 27 identifies opening between the cap body 2 and the upper lid 20, and any known method can be adopted. In the present embodiment, the second tamper evidence band 27 is arranged in the axial direction of the upper end of the skirt wall of the cap body. A narrow second tamper-evident band 27 is provided through a slit from the base end portion of the extending band, and a breakable bridge is optionally provided between the upper edge of the skirt wall and the lower edge of the upper lid. Yes.
In the figure, 11 is a female screw formed on the inner peripheral surface of the skirt wall, and 28 is a knob portion erected on the outer peripheral surface of the second tamper-evident band 27. Reference numeral 30 denotes a first tamper evident band for identifying opening between the cap main body and the bottle, which is connected to the lower end of the skirt wall via the weakened portion 31 and can adopt known means as appropriate. 32 is a flap piece formed on the inner peripheral surface of the first tamper evident band. In the present embodiment, a screw cap for screwing the cap body into the container is employed, but not only the screw cap but also a stopper cap, and the form thereof is not limited.

  The upper lid 20 has a flare wall 40 and a top wall 41 that cover the outer periphery of the inner plug, which will be described later, and engages with the upper end of the outlet nozzle 51 of the inner plug on the inner surface side of the top wall, after the initial opening. A reseal cylinder 46 having an engaging portion for resealing is formed, and a locking head 62 of a locking strut 61 formed in the cutout portion of the inner plug located inside the reseal cylinder is fitted. A cylindrical locking cylinder 42 to be locked is suspended and formed to protrude. The locking cylinder 42 is formed on the line connecting the center of the hinge part and the center of the outlet nozzle of the inner plug so as to be eccentric to the opposite side of the hinge part 21 so that a later-described cutout part of the inner plug can be easily cut off. It is provided at a position as far as possible from the hinge side. In this embodiment, as shown in FIG. 1B in an enlarged manner, the locking cylinder 42 is a locking portion 43 whose inward portion protrudes inward, and its axial space length is locked. An engaging protrusion 44 (formed at the lower end of the flare wall of the upper lid 20 at the time of initial opening, as will be described later, is formed slightly longer than the locking head 62 of the locking post 61 that is fitted and locked to the cylinder 42. After the undercut portion is disengaged from the engagement rim 59 provided on the outer peripheral surface of the top wall of the inner plug, the lower end of the head of the locking projection and the locking portion 43 of the locking cylinder are locked. Thus, in the sealed state before opening, a gap 47 having a height t is formed between the upper surface of the locking portion 43 of the locking cylinder 42 and the lower end of the locking head 62 of the locking column 61. Has been. In this state, it is desirable to allow a slight gap between the top surface of the head 62 and the top surface of the locking cylinder 42. Thereby, at the time of assembling with the inner plug described later, the impact on the weakened portion of the cutout portion of the inner plug can be mitigated and the breakage can be prevented. Further, when the top wall 41 of the upper lid is pressed, it is possible to prevent the pressing force from being transmitted to the locking column 61. In addition, 45 is a finger engaging part which protrudes in the radial direction outer surface from the ceiling wall outer peripheral surface by the side of the latching cylinder of the upper cover 20 used as a finger hook at the time of upper cover opening.

  On the other hand, the details of the inner plug 3 are shown in FIGS. As shown in FIG. 4E, the inner plug 3 includes an inner plug body 50 and a dispensing nozzle 51 protruding upward from the inner end of the annular top wall 54. The inner plug main body 50 has a locking flange 52 that fits into the cylindrical wall 13 of the cap main body 2 and has an upper surface that abuts the annular locking portion 14, and rises annularly from the upper end surface of the cap main body 50. A cylindrical wall 53 extending upward through the inner peripheral edge of the annular locking portion 14 is provided, and the above-described cylindrical discharge nozzle 51 is formed on the top wall 54 so as to protrude. The top panel 55 of the pouring nozzle 51 is provided with a thin-film-like cutout portion 60 that opens a pouring nozzle, which will be described in detail later, and an upper lid at an eccentric position opposite to the hinge side of the cutout portion 60. A columnar locking column 61 that is fitted to the locking cylinder 42 is formed to protrude.

  The locking column 61 has a locking head 62 at the top of the column 63, and the diameter of the column 63 is smaller than the inner diameter of the locking portion 43 of the locking cylinder 42 of the upper lid. The outer diameter is slightly larger than the inner diameter of the locking portion 43 (see FIG. 1B), and once fitted with the locking cylinder, the lower end of the locking head engages with the locking portion of the locking cylinder, It is designed not to come out of the stopper tube.

  Further, in this embodiment, in order to prevent the upper lid from rotating relative to the inner plug in the fitted state and inadvertent twisting force acting on the weakened portion of the cutout portion, Non-rotating protrusions 56 are formed at predetermined intervals on the upper surface of 52. Correspondingly, an anti-rotation recess 34 into which the anti-rotation protrusion 56 is fitted is formed in the annular locking portion 14 of the cap body (FIGS. 1 and 3). In addition, positioning ribs 57 are formed as positioning means at specific positions on the inner peripheral surface of the cylindrical wall 53 of the inner plug (for example, positions that coincide with the radial center line passing through the locking strut position). In addition, 49 in FIG. 4 is an inner ring fitted to the inner peripheral surface of the bottle mouth.

  And in this invention, in order to make it possible to cut off a cutting part easily by the opening operation | movement of the upper cover which is hinge-coupled even if the extraction nozzle diameter is small, the following technical means were employ | adopted.

First, (1) the engagement position between the cutout portion and the upper lid is decentered to the opposite side of the hinge portion, and (2) the vicinity of the standing position of the locking strut of the cutout portion is made thicker than the other portions. At this time, the deformation (elongation) of the portion is prevented so that the tension effectively acts on the pulling piece. (3) The hinge side portion is thinner than the standing position of the locking post so that it is easily bent when opened. (4) By forming a thick part connected to the thin part in the vicinity of the weakening line on the hinge side, it is possible to prevent the resin in the cut part from extending before the end of the break of the cut part, The above problem could be solved by making it possible to cut well to the end.
In particular, as shown in FIGS. 7C to 7F, which will be described later, when the opening is performed by means of (3), the thin-walled portion gradually bends downward, so that the opening trajectory of the locking struts is open without resistance. Thus, opening can be facilitated, and a good fracture surface can be obtained by suppressing the elongation of the resin film when the cut portion is removed by means of (4).

FIG. 5 is an enlarged view of an embodiment of a cutout portion according to the present invention, in which (a) is a sectional view thereof and (b) is a bottom view thereof.
The cutout portion 60 is partitioned and formed by an endless weakening portion 65 on the top panel 55 of the dispensing nozzle, and as shown in FIGS. 5 (a) and 5 (b), the locking strut side thick portion 66, the intermediate thin portion 67, is divided into a hinge-side thick portion 68, a locking post 61 is erected on the locking post-side thick portion 66, and the locking post-side wall is formed from the locking post-side thick portion 66 through a stepped portion 69a. The hinge-side thick portion 68, which is thicker than the intermediate thin portion, is connected to the intermediate thin portion 67, which is thinner than the thick portion, and through the step portion 69b from the intermediate thin portion 67. The step portions 69a and 69b are formed across the cut portion so as to be substantially parallel to the hinge line of the upper lid. For this reason, when the locking column 61 is lifted by the upper lid at the time of opening, the step portions 69a and 69b become folds.
Here, the hinge line refers to an imaginary line in the width direction of the oscillating portion in which the upper lid (hinge lid) is an oscillating axis with respect to the cap body, and in this embodiment, the pair of oscillating pieces 22, 22 A virtual straight line connecting the centers.
In the present embodiment, as shown in FIG. 5A, the top surface of the top panel 55 is flush, and the locking-side thick portion 66 and the hinge-side thick portion 68 of the cut-out portion 60 are intermediate thin portions. It is easy to form by forming it so as to protrude from the back surface side with respect to 67, but it is not necessarily limited to that shape.

  The proportions of the locking strut side thick part 66, the intermediate thin part 67, and the hinge side thick part 68 occupying the cutout part 60 affect the pluggability at the time of opening as will be described later. As shown in FIG. 5 (a), when the cut-out portion length P on the axis L passing through the hinge-side center and the dispensing nozzle center (hereinafter referred to as the hinge-direction length of the cut-out portion) is used, The length Pa of the thick portion 66 needs to have at least an area that can secure the standing position of the locking column 61 and depends on the diameter of the pouring nozzle, but at least as shown in FIG. A range of 1/2 to 1/3 of the length P in the hinge direction of the cut-out portion on the axis passing through the side center and the center of the dispensing nozzle is desirable. In addition, the intermediate thin portion 67 performs an important function of causing the breaking force to act on the breakage point in a nearly vertical state to the weakened portion by gradually bending as the upper lid rotates at the time of opening as will be described later. The length Pb in the hinge direction needs to be long enough to perform the above function, and is preferably in the range of P / 2 to P / 5. Furthermore, as will be described later, the hinge-side thick portion 68 functions to suppress the generation of whiskers due to the resin being stretched just before the cut-out of the cut-out portion. However, if the length is too long, the length of the intermediate thin portion is shortened and the opening breakability is deteriorated. Therefore, the hinge direction length Pc is preferably in the range of P / 4 to P / 8. Therefore, the relationship of Pa: Pb: Pc = (1/2 to 1/3) :( 1/2 to 1/5) :( 1/4 to 1/8) is desirable.

  The hinge cap 1 according to the present embodiment has the above-described configuration, and the locking post 61 and the locking cylinder 42 are in the eccentric positions. Need to be positioned and fitted. Further, in order to fit the locking column 61 so as not to come off from the locking cylinder 42, the engagement area between the locking portion 43 of the locking cylinder 42 and the lower surface of the head of the locking column 61 must be large. Therefore, when assembling, the locking head 62 of the locking strut must deform the locking portion 43 and get over it, and it is necessary to press it with a strong force to force it. When pressure is applied, the weakened portion 65 may be broken. Therefore, in the present embodiment, the inner plug 3 and the cap body 2 are assembled using a special assembly jig. FIG. 6 is a process diagram for assembling the inner plug 3 to the cap body 2 using the assembly jig 70.

  As shown in FIG. 6, the assembly jig 70 is formed in a shape that fits to the inner peripheral surface of the inner plug 3 so as to engage with the inner peripheral surface and the lower surface of the inner plug 3. A dispensing nozzle fitting portion 71 that fits into the dispensing nozzle 51 and supports the cutting portion 60 so that the weakened portion does not break even if the top surface comes into contact with the cutting portion 60 and a pressing force acts on the cutting portion from above. A cylindrical wall fitting portion 72 which is fitted to the inner peripheral surface of the cylindrical wall 53 and engages with the top wall 54 of the inner plug at a stepped surface with the dispensing nozzle fitting portion 71, and the bottle mouth It has a top seal groove fitting portion 73 that fits into the top seal groove 58 to be a contact position with the top portion, and the cylindrical wall fitting portion 72 is fitted with a positioning rib 57 of the inner plug, A positioning recess 74 for positioning the stopper is formed. The top surface of the dispensing nozzle fitting portion 71 is formed in a shape that exactly matches the back surface shape of the cutout portion 60, and supports the cutout portion 60 from the lower surface without a gap.

  By using the assembly jig 70 as described above, the inner plug 3 can be safely and securely attached to the cap body 2 through the steps of FIGS. 6A to 6E. That is, first, the inner plug is attached to the assembly jig with the positioning recess 74 of the assembly jig 70 and the positioning rib 57 of the inner plug 3 aligned (FIGS. 6A to 6B), and then attached to the assembly jig. The cap main body and the inner plug are aligned so that the locking strut 61 of the inner plug is aligned with the locking cylinder 42 of the upper lid on the axis line, and the axial movement is relatively performed so that both are fitted. Then, the locking head 62 bulging out of the locking column 61 is pushed in strongly so as to pass through the locking portion 43 of the locking cylinder 42. At that time, the inner diameter of the locking portion of the locking cylinder is outside the locking head of the locking column so that the locking column 61 and the locking tube 42 are strongly fitted and do not disengage even when a strong tension is applied during opening. Because it is smaller than the diameter, even if a strong pressing force is applied to expand the inner diameter of the locking part and forcibly fit, the cutting part is supported on the top surface of the assembly jig without any gaps, so the pressing force is directly Both can be safely assembled without acting on the weakened part of the cut-out part (FIGS. 6C to 6E).

Next, the opening operation of the bottle with the hinge cap 1 assembled as described above will be described with reference to FIG.
FIG. 7A shows a state where the hinge cap 1 is screwed into the bottle mouth and the bottle 100 is sealed. From this state, the knob portion 28 erected on the outer peripheral surface of the second tamper-evident band 27 is provided. A breakable bridge connected to the second tamper evidence band 27 is broken by picking it with a finger and pulling it outward. Thereafter, the finger engaging portion 45 of the upper lid 20 is pushed up with a finger, and the upper lid 20 is rotated upward via the hinge piece 22, whereby the engagement protrusion 44 of the upper lid 20 and the engagement rim 59 of the inner plug 3 are engaged. The engagement is disengaged (FIG. 7B), and then the engagement between the engaging portion of the reseal cylinder 46 and the annular engaging portion 69 at the outer periphery of the upper end of the dispensing nozzle 51 is also disengaged. Alternatively, instead of the second tamper-evidence band 27, the lower end edge of the upper lid and the upper end edge of the skirt wall can be connected by a breakable bridge. In this case, by pushing up the finger engaging portion 45 of the upper lid 20 with a finger, the operation of breaking the bridge and the rotating operation of the upper lid can be performed simultaneously.
Thereafter, the locking portion 43 of the locking cylinder 42 is brought into pressure contact with the locking head 62 of the locking column 61 and acts to pull up the locking column along the opening direction arc trajectory of the hinged upper lid, thereby weakening. An initial break is caused at the top of the portion 65 opposite to the hinge. In other words, after the engagement with the engagement rim 59 provided on the outer peripheral surface of the top wall of the inner plug and the engagement between the engagement portion of the reseal cylinder 46 and the annular engagement portion 69 at the outer periphery of the upper end of the dispensing nozzle 51 are released. Alternatively, in the middle of disengagement, the lower end of the head of the locking projection engages with the locking portion 43 of the locking cylinder, and is initially broken (FIG. 7 (b) → (c)). Conventionally, a large breaking force is required to cause the initial breakage in the weakened portion. However, in this embodiment, the locking position between the cutout portion 60 and the upper lid 20 is provided eccentrically at a position farthest from the hinge portion. The turning radius was increased so that the vertical tension was applied to the locking column, and the initial breaking timing of the weakened part was after the tamper evidence band was broken and the upper lid and the inner plug were disengaged. In this way, the opening force of the upper lid was concentrated on the initial breakage of the weakened portion, and the vicinity of the standing position of the locking strut of the cutout portion was thickened so that the cutout portion did not extend and the tension was applied reliably. By doing so, an initial fracture can be caused very easily (FIGS. 7B to 7C).

  Furthermore, by rotating the upper lid, as shown in FIGS. 7C to 7D, the intermediate thin portion 67 of the cutout portion located on the hinge side gradually bends as the upper lid rotates, so that the weakened portion For example, as shown in (d), since the breaking force acts in a state that is nearly perpendicular to the breaking point P, the weakened portion 65 can be broken relatively easily. Thereafter, as the breakage progresses, tensile stress concentrates on the uncut portion on the hinge side, so that the vicinity of the weakened portion on the hinge side of the cut-out portion 60 that is film-like tends to stretch linearly including the weakened portion and hardly break However, in the present invention, since the cut-out portion in the vicinity of the hinge side is the hinge-side thick portion 68, the elongation is suppressed and the cut-out portion can be satisfactorily cut out. As a result, the opening edge becomes smooth after opening, and it is possible to reduce the possibility of causing a sense of incongruity or scratching even if a finger or a lip is applied to the opening.

When the weakened portion 65 of the top opening of the dispensing nozzle 51 is completely broken, the cutout portion 60 is integrally rotated while being locked to the locking cylinder of the upper lid, and the upper lid is further moved from the state shown in FIG. By rotating, the upper lid is held in an inverted state as shown in FIG. 5G by the engaging action of the main body side holding piece and the upper lid side holding piece provided in the hinge portion described above.
Therefore, as shown in FIG.8 (b), a content liquid can be directly poured out or drunk from the opening of an inner stopper, without an upper cover becoming obstructive. Further, after pouring, the upper lid is simply turned and closed, and as shown in FIG. 8 (c), the engaging portion of the reseal cylinder 46 and the annular engaging portion 69 at the upper end of the pouring nozzle 51 are brought into close contact with each other. The engaging projection 44 at the lower end of the flare wall engages with the engaging rim 59 of the inner plug to seal the inner plug with the upper lid.
Therefore, according to the hinge cap of the present embodiment, as shown in FIG. 8, it is not necessary to remove the cap as in the case of the conventional screw cap, and the upper lid is in an inverted state. The bottle can be poured out or drunk in the open state (FIG. 8B), and then the bottle can be resealed with one touch by pushing the upper lid counterclockwise from the state of FIG. 8B. (FIG. 8 (c)), and it is possible to perform one-touch operation of dispensing the content liquid and repeating the reseal.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the technical idea.
In the above-described embodiment, the case where the hinge cap is configured by two pieces of the cap main body and the inner plug is shown, but the present invention is not necessarily limited to two pieces, and can be applied to a three-piece or one-piece hinge cap. FIG. 9 shows an embodiment when applied to a one-piece hinge cap.
The hinge cap 80 of the present embodiment is equivalent to the hinge cap in the embodiment shown in FIG. 1 in which the inner plug and the cap main body are integrally formed, and the basic structure such as a sealing structure and an opening structure is the same as that of the above-described embodiment. Therefore, the same reference numerals are assigned to similar parts, and only the differences will be described.

In the hinge cap 80 of the present embodiment, the cap main body 81, the inner plug portion 82, and the upper lid portion 83 are integrally formed, and FIG. 9 shows a state in which the cap is injected and released from the mold.
In the case of the hinge cap 80 of the present embodiment, since the whole is integrally formed, the locking column 61 of the inner plug portion 82 and the locking cylinder of the upper lid portion 83 that connect the cutout portion 60 of the inner plug portion and the upper lid portion. Therefore, it is not necessary to provide positioning ribs or anti-rotation protrusions as in the above-described embodiment, and it is not necessary to provide positioning recesses in the assembly jig, but the upper lid portion is removed from the state shown in FIG. In order to close and engage the locking head 62 of the locking column 61 and the locking protrusion 44 of the locking cylinder 42, it is desirable to use a dedicated assembly jig for the reasons described above.

Although the integrally formed one-piece synthetic resin cap 80 of the embodiment shown in FIG. 9 is applied to a stopper cap, it goes without saying that it can also be applied to a screw cap.
In FIG. 9, an outer peripheral portion of the distal end portion of the finger engaging portion 85 for opening and the finger engaging portion 85 are provided in the middle lower portion of the skirt wall 85 of the cap main body portion 81 with the upper lid portion 83 closed. A tamper-evidence band 86, which is a band-like cover that covers the outer surface of the skirt wall 85 at the position where it is located, is connected via a breakable weakening line 87. Therefore, when the tamper evidence band 86 is broken and widened in the unopened state after being attached to the container, the finger cannot be engaged with the finger engaging portion 85. Subsequent opening operation is substantially the same as in the above embodiment, and the cutout portion can be removed and opened together with the opening of the upper lid.

  The hinge cap of the present invention is suitable as a cap for sports drinks because it can open and close the upper lid with one touch and can dispense the content liquid without removing the lid, but it can be used for various drinks and seasonings. Applicable to filling containers.

DESCRIPTION OF SYMBOLS 1,80 Synthetic-resin hinge cap 2 Cap main body 3 Inner plug 10 Skirt wall 11 Female screw 13 Cylindrical wall 14 Cylindrical latching part 20 Top cover 21 Hinge part 22 Hinge piece 23 Projection 24 Main body side holding piece 25 Upper lid side holding piece 26 Outer peripheral surface 27 Second tamper-evidence band 28 Knob 30 First tamper-evidence band 31 Weakening part 32 Flap piece 34 Detent recess 40 Flare wall 41 Top wall 42 Locking cylinder 43 Locking part 44 Engaging protrusion 47 Gap 45 Finger engaging portion 46 Reseal cylinder 49 Inner ring 50 Inner plug body 51 Outlet nozzle 52 Locking flange 53 Cylindrical wall 54 Top wall 55 Top panel 56 Anti-rotation projection 57 Positioning rib 58 Top seal groove 59 Engagement rim 60 Cut off portion 61 Locking strut 62 Locking head 63 Strut portion 65 Weakening portion 66 Locking strut side thick portion 67 Medium Thin part 68 Hinge side thick part 69a, 69b Step part 70 Assembly shaft 71 Outlet nozzle fitting part 72 Top seal groove fitting part 74 Positioning concave part 81 Cap body part 82 Inner plug part 83 Upper lid part 85 Finger engaging part 86 Tamper evident band 87 weakening line

Claims (5)

In a synthetic resin hinge cap consisting of a cap body consisting of a skirt wall that engages with the bottle mouth and an upper lid formed integrally through a hinge piece, and an inner stopper that closes the bottle mouth,
The inner stopper is composed of an inner stopper main body that fits into the top of the bottle mouth and an outlet nozzle that protrudes upward from the inner end of the annular top wall of the inner stopper main body, and the upper inner peripheral surface of the outlet nozzle is broken. A cut-out part is formed to close the bottle mouth surrounded by possible weakening parts,
A columnar locking column is formed on the upper surface of the cutout portion at an eccentric position opposite to the hinge portion of the upper lid, and the engaged means is engaged with the locking column on the inner surface of the top wall of the upper lid. Formed,
The cut-out portion is divided into a locking strut side thick portion, an intermediate thin portion, and a hinge side thick portion, and the locking strut is erected on the locking strut side thick portion. The thickness from the thick part is connected to the intermediate thin part thinner than the locking strut side thick part through the step, and the hinge side thickness is thicker than the intermediate thin part from the intermediate thin part through the step. A synthetic resin hinge cap characterized in that the parts are connected.   The step between the locking strut side thick portion and the intermediate thin portion and the step between the intermediate thin portion and the hinge side thick portion cross the cut portion so as to be substantially parallel to the hinge line of the upper lid, respectively. The synthetic resin hinge cap according to claim 1, wherein the synthetic resin hinge cap is formed.   The locking strut has a locking head whose top portion bulges, and the engaged means is a locking cylinder that hangs down from the top surface of the upper lid and fits the locking head. There is a locking portion that the lower surface of the locking head is locked to the lower end of the stopper cylinder, and an upper lid is formed between the locking portion and the lower end surface of the locking head at the initial stage of opening the upper lid. The synthetic resin hinge cap according to claim 1 or 2, wherein a space is formed in which the locking portion can slide along the locking support until the container body is disengaged.   The positioning means for positioning the locking post with respect to the engaged means formed on the upper lid and fitting the inner stopper to the cap body is formed on the inner stopper. 3. A synthetic resin hinge cap according to any one of 3 above. A cap body comprising a skirt wall engaging with the bottle mouth, an annular top wall projecting inward from the upper end of the skirt wall, and a pouring nozzle projecting upward from the inner end of the annular top wall, and a hinge piece on the cap body In a synthetic resin hinge cap consisting of an upper lid formed integrally with
A cutout portion for closing the bottle mouth surrounded by the weakened portion that can be broken is formed on the upper inner peripheral surface of the dispensing nozzle,
A columnar locking column is formed on the upper surface of the cutout portion at an eccentric position opposite to the hinge side of the upper lid, and the engaged means is engaged with the locking column on the inner surface of the top wall of the upper lid. Formed,
The cut-out portion is divided into a locking strut side thick portion, an intermediate thin portion, and a hinge side thick portion, and the locking strut is erected on the locking strut side thick portion. The thickness from the thick part is connected to the intermediate thin part thinner than the locking strut side thick part through the step, and the hinge side thickness is thicker than the intermediate thin part from the intermediate thin part through the step. A synthetic resin hinge cap characterized in that the parts are connected.

Images