JP4834229B2 - Plastic cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin cap that is attached to a bottle mouth (portion of a container) by stoppering (forced fitting).
[0002]
[Prior art]
The cap-type cap includes a main body provided with a spout and a screw-type or hinge-type lid that closes the spout.
[0003]
The main body has an outer cylinder that fits into the bottle mouth from the outside, and an annular locking portion that fits into an annular fitting portion such as an annular protrusion formed on the outer circumference of the bottle mouth is formed on the inner circumference of the outer cylinder. The annular locking portion is elastically deformed and forcibly fitted to the annular engaging portion of the bottle mouth, thereby being attached to the bottle mouth.
[0004]
Then, a cylinder is fitted to the main body, and a lid is integrally provided on the cylinder via a hinge, or a screw lid is screwed into the cylinder. Examples of the former include, for example, JP-A-11-130113, JP-A-11-222253, or utility model registration No. 3059065, and examples of the latter include, for example, Japanese Utility Model Laid-Open No. 62-22953. is there.
[0005]
In this way, the type in which the cylinder is fitted to the main body has a sharp design by changing the color between the main body and the cylinder, and the mounting strength can be improved by firmly holding the main body with the cylinder. There are advantages.
[0006]
By the way, most of the cap-type caps are made of a material different from that of the container (bottle). Therefore, in order to facilitate the recycling of the container, the cap is placed after the content is consumed. It needs to be easily removable from.
[0007]
In this case, as a means for improving recyclability in a cap of a type in which a cylinder is fitted to the main body, the above-mentioned JP-A-11-222253 discloses that the cylinder and the main body can be removed together using a bottle opener. Are listed.
[0008]
On the other hand, in the utility model registration No. 3059065, a structure in which the cylinder can be easily detached from the main body by hand, and a tab and a weakening line for opening the outer cylinder upward are provided in the outer cylinder of the main body. Is described.
[0009]
[Problems to be solved by the invention]
By the way, in order to facilitate recycling, it is preferable that a person can remove the cap by hand (finger) without using any tools. On the other hand, as an essential function as a cap, it is also necessary to secure the attachment strength to the bottle mouth.
[0010]
However, the configuration of the above-mentioned Japanese Patent Application Laid-Open No. 11-222253 can increase the attachment strength to the bottle mouth, but there is a problem in that it is not easy to remove the cap to remove the cap.
[0011]
On the other hand, in the case of Utility Model Registration No. 3059065, it is excellent in recyclability because a person can remove the cap by hand without using a tool, but since a tab is provided, a slit is formed on the outer periphery of the main body. Since it is formed, there is a problem that the attachment strength may be lowered.
[0012]
The present invention aims to improve such a current situation.
[0013]
[Means for Solving the Problems]
The cap of the present invention comprises a main body provided with a spout, a cylindrical body fitted to the main body from the outside, and a lid integrally connected to the cylindrical body via a hinge, and the cylindrical body is rotated. The main body is fitted so that it can be removed from the main body, and the spout of the main body is closed by the lid.
Furthermore , the main body has an outer cylinder that is attached to the bottle mouth from the outside by forced fitting by a stopper , and the cylindrical body is exposed with a lower end portion of the outer cylinder exposed to the outer cylinder of the main body. Are fitted from the outside, and a protruding ridge protruding outward is formed on the exposed lower end of the outer cylinder, and by dividing the ridge in a recess penetrating vertically, a circumference is obtained. A tab extending in the direction and having a base connected to the ridge is formed, so that the tab is exposed below the cylindrical body.
[0014]
A weakening line for tearing the outer cylinder by pulling the tab is formed on the outer cylinder of the main body so as to extend from the vicinity of the base of the tab.
[0015]
[0016]
[0017]
[Operation and effect of the invention]
According to the present invention, the outer cylinder of the main body is continuous in the circumferential direction even at the location of the tab. Therefore, as compared with the case where the outer cylinder is provided with a slit as in the above-mentioned utility model registration No. 3059065, The strength can be remarkably improved.
[0018]
Therefore, the outer tube can be prevented or significantly reduced accident breaking during capping, reduction of mounting only strong degree for bottle mouth can be suppressed.
[0019]
In addition, the main body can be removed from the bottle mouth by removing the cylinder from the main body and then pulling the tab and tearing the outer cylinder of the main body. Recyclability can be improved because it can be done only with a finger).
[0020]
If it the outer cylinder to the same thickness over its entire circumference, the tabs because protrude outside the outer cylinder, there is a problem that the outer diameter of the cylindrical body is increased. On the other hand, in this invention, since a tab can be accommodated in the recess of an outer cylinder, there exists an advantage which can prevent that a cylinder body enlarges.
[0021]
Also, when removing grab by hand human outer tube, since the rotating from pulling the cylindrical body merely in the axial direction (twisting) it is, can act strongly external force to the outer tube, in the present invention, the main body There exists an advantage which can remove a cylinder easily in the state which raised the fitting strength of the cylinder with respect to.
[0022]
By the way, there is a possibility that the outer cylinder of the main body may be illegally torn at a distribution stage such as a state where merchandise sealed with a cap is displayed in a store.
[0023]
As a countermeasure against this fraud, in the present invention, the tab is exposed to the outside, so if there is a fraud, it can be revealed and the fact that the fraud was fraudulent before the consumer purchase can be seen. The
[0024]
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
(1). First embodiment (FIGS. 1 and 2)
1 to 2 show the first embodiment.
[0026]
1A is a longitudinal front view in a separated state, FIG. 1B is a front view in a separated state, FIG. 1C is a bottom view, FIG. 2A is a front view, and FIG. is a longitudinal front view of a state attached to the bottle mouth 1.
[0027]
The cap includes a main body 2 attached to the bottle mouth 1, a cylindrical body 3 fitted to the main body 2, and a lid 5 provided integrally with the cylindrical body 3 via a hinge 4.
[0028]
Main body 2 comprises a full outer cylinder 6 fitted from the outside to the bottle mouth 1, a full inner sleeve 7 fitted from inside the bottle mouth 1, and a spout 8 which is integrally connected to the inner cylinder 7. The upper end of the outer cylinder 6 is a shoulder portion 9 having a step difference. An outward male screw 10 is formed on the outer cylinder 6.
[0029]
The inside of the main body 2 is shielded by a shielding plate 11, and a closed-loop score 12 is formed on the shielding plate 11, and a pull ring 14 is integrally provided at an appropriate portion of the inner periphery of the score 12 via a tab support 13. ing. A flange 16 is formed on the outer peripheral surface of the bottle mouth 1 so as to be in close or close contact with the lower end of the outer cylinder 6.
[0030]
An inward annular groove 18 is formed in the outer cylinder 6 of the main body 2 so as to be fitted to an outward annular protrusion 17 formed on the outer peripheral surface of the bottle mouth 1. The outward annular protrusion 17 is an example of an annular engagement portion, and the inward annular groove 18 is an example of an annular locking portion. An outward annular groove may be formed in the bottle mouth 1, and an inward annular protrusion may be provided inwardly on the outer cylinder 6. The annular groove or annular projection may be are provided in plurality.
[0031]
On the lower end edge of the outer cylinder 6 in the main body 2, a protrusion (flange) 19 having an outward radius and a square cross section is formed. For this reason, the lower end edge of the outer cylinder 6 is thick. Then, a recess 20 having an outward opening is formed by thinning the outer cylinder 6 in a certain range of the outer peripheral surface of the outer cylinder 6 that extends in the circumferential direction. A strip-shaped tab (knob) 21 having one end (base) connected to the protrusion 19 is disposed.
[0032]
The recess 20 penetrates the ridge 19 and opens up and down (to make it easy to remove the mold during molding). Therefore, the ridge 19 is divided by the recess 20. Thereby, the tab 21 in which the root is connected to the protrusion 19 is formed.
[0033]
The tab 21 is set to have the same vertical width as the protrusion 19 of the outer cylinder 6, and a slight gap is left between the tab 21 and the recess 20. The tab 21 is set to a length that can be easily picked by a person with a finger, and the base of the tab 21 is connected to one end of the ridge 19 so as not to be shredded. The tip portion of the tab 21, via the pull shredded bridges 22 are connected to the inner surface of the recess 20 (which may be provided continuously to the other end of the ridge 19.).
[0034]
(2) Outer cylinder and lid The outer cylinder 6 is formed with a thin weakened line (score) 23 for tearing the outer cylinder 6 by pulling the tab 21. The weakening line 23 starts from the base portion of the tab 21 and extends obliquely upward while moving away from the tab 21, and then extends to the shoulder portion 9 in the circumferential direction.
[0035]
The weakening line 23 is set to a length of about a half circumference of the outer cylinder 6. The starting end of the weakening line 23 is located at the end of the recess 20 (near the base of the tab 21) and reaches the lower end of the outer cylinder 6.
[0036]
Since the weakening line 23 extends to the shoulder portion 9, when the main body 2 is manufactured by an injection molding method, there is an advantage that the die-cutting resistance can be reduced. Although not shown, the tab 21 is preferably provided with a protrusion or unevenness so that the tab 21 can be easily caught when picked up with a finger.
[0037]
On the inner surface of the cylindrical body 3, an inward male screw 24 that engages with the outward male screw 10 of the main body 2 is provided. Further, an inward flange 25 that overlaps the shoulder 9 of the main body 2 is formed on the upper portion of the cylindrical body 3, and when the cylindrical body 3 is screwed off, the lower end of the cylindrical body 3 hits the protrusion 19 of the main body 2 and The flange 25 hits the shoulder 9 of the main body 2.
[0038]
In a state in which the cylinder 3 is screwed, the tab 21 is exposed from the cylinder 3, and therefore, if there is an illegal act in which the tab 21 is pulled and the bridge 22 is torn off at the distribution stage, the fact is visually recognized. be able to.
[0039]
Male thread 10, 24 are those, which forms one example of the engagement means, in the present embodiment, since the so-called forced disconnect makes it easy when shaped by injection molding or compression molding, and the combination of the external thread 10, 24. Of course, a combination of a female screw and a female screw is possible if the molding conditions permit.
[0040]
In a state where the cylindrical body 3 is screwed into the main body 2, the hinge 4 and the tab support 13 are arranged in the radial direction. This is for facilitating pulling of the pull ring 14 with the lid 5 open.
[0041]
[0042]
(3). Action In the packaging process, the cap is dropped into the bottle mouth 1, and then the cap is hit with a punch from above (that is, plugged). Then, due to the elastic deformation of the outer cylinder 6, the inward annular groove 18 is forcibly fitted to the outward annular protrusion 17 of the bottle mouth 1.
[0043]
In this case, since the outer cylinder 6 is continuous in the circumferential direction even at the location of the tab 21, the strength against the tensile force in the circumferential direction is high. For this reason, it is possible to prevent or remarkably suppress a breakage accident at the time of stoppering.
[0044]
In addition, the main body 2 is reinforced by the cylindrical body 3 by fitting the cylindrical body 3 to the main body 2, and also from this point, the breakage accident of the main body 2 at the time of stoppering is more reliably prevented or suppressed. it can.
[0045]
When the container (bottle) is recycled after the consumer has consumed the contents, the cylinder 3 is removed by unscrewing, the tab 21 is pulled to tear the body 2 along the weakening line 23, and then the body Just grab 2 with your hand and pull it out of the bottle mouth 1.
[0046]
Although it is possible to form the portion near the starting end of the weakening line 23 so as to extend in the axial direction of the main body 2, if the portion near the starting end is formed in an inclined shape as in the present embodiment, a unit of the portion near the starting end at the time of plugging Since the tensile stress per length can be reduced, the strength can be further improved.
[0047]
(4). Second embodiment (FIGS. 3 to 4)
When the cylindrical body 3 is screwed into the main body 2, the cylindrical body 3 is held and rotated by a chuck (not shown) while the main body 2 is fixed.
[0048]
In 2nd Embodiment shown in FIGS. 3-4, the fixing means of the main body 2 in the screwing process is shown. 3 is a separation view, and FIG. 4 is a sectional view taken along line IV-IV in FIG.
[0049]
In this embodiment, the basic structure of the cap is the same as that of the first embodiment. In the second embodiment, a plurality of locations ( three locations in the figure) are provided on the protrusion 19 of the main body 2 along the circumferential direction. Is different in that the engagement groove 27 is provided.
[0050]
The jig 28 into which the main body 2 is fitted is provided with a plurality of protrusions 29 that fit into the engagement grooves 27.
[0051]
Although it is possible to fix the main body 2 by clamping the inner cylinder 7, if the inner cylinder 7 is clamped, the score 12 may be broken or damaged by an external force at the time of screwing. On the other hand, in this embodiment, since the outer cylinder 6 is clamped, the cylinder 3 can be firmly screwed into the outer cylinder 6 without causing a decrease in the strength of the score 12.
[0052]
(5) Third embodiment (FIG. 5)
The third embodiment shown in FIG. 5 is another example of means for easily holding the main body in a non-rotatable manner in the screwing process.
[0053]
Of these, in the example shown in (A), the outer surface of the ridge 19 is knurled so that it can be easily gripped by the chuck. In the example shown in (B), the cylindrical portion 19a is connected to the ridge 19 continuously. The inner peripheral surface is knurled.
[0054]
(6). Fourth embodiment (FIGS. 6 to 7)
6-7 is 4th Embodiment, FIG. 6 is a top view, FIG. 7 is a front view.
[0055]
This embodiment is also an example of a structure for facilitating screwing of the cylindrical body 3, and the lid 5 and the cylindrical body 3 and the protrusion 19 of the main body 2 are formed in a non-circular shape such as a regular 24-angle. For this reason, the cylinder 3 and the main body 2 can be firmly held by a chuck or a jig. The internal structure of this embodiment is the same as that of the first embodiment.
[0056]
(7). Fifth embodiment (FIG. 8)
In 5th Embodiment shown in FIG. 8, an example of the stopper means which regulates the screwing position of the cylinder 3 correctly is shown. (A) is a partial cross-sectional view, and is a cross-sectional view taken along line AA in (B), and (B) is a cross-sectional view taken along line BB in (A).
[0057]
In this embodiment, a stopper 30 is provided at an appropriate position on the upper surface of the protrusion 19 of the outer cylinder 6 in the main body 2, while the stopper 30 enters the lower end portion of the cylinder 3 by screwing the cylinder 3 inward. The notch 31 is provided, and the one end face 31 a of the notch 31 is brought into contact with the stopper 30 to regulate the screwing posture of the cylindrical body 3.
[0058]
(8). Sixth embodiment (FIG. 9)
FIG. 9 also shows an example of the stopper means, in which (A) is a partial front view, and (B) is a sectional view taken along the line BB of (A). In this embodiment, the notch 31 is exposed inside and outside.
[0064]
(9). Seventh embodiment (FIGS. 10 to 12 )
10 to 12 show a seventh embodiment. Figure 10 is a sectional view of use, Figure 11 is a developed view of a state viewed from the XI-XI direction of viewing FIG. 10, FIG. 12 is a XII-XII view partially broken bottom view of FIG. 10.
[0065]
The seventh embodiment is a hinge-type cap. The tab 21 is located below the hinge 4 and protrudes radially outward from the protrusion 19 of the main body 2. Since the hinge 4 protrudes outside the radius of the lid 5, it does not feel strange even if the tab 21 protrudes outside the protrusion 19.
[0066]
A plurality (four) of outward ribs 32 are provided at appropriate intervals on the outer peripheral surface of the outer cylinder 6 in the main body 2.
[0067]
On the other hand, on the inner peripheral surface of the cylinder 3, inward ribs 33 are integrally provided to be engaged with the outward ribs 32 from below while the cylinder 3 is fitted into the outer cylinder 6. A guide portion 33a extending obliquely to the upper right is integrally provided at the right end portion of the inward rib 33, and a stopper portion 33b having a low height is integrally provided at the left end portion. These ribs 32 and 33 are those, which forms one example of the engagement means.
[0068]
In this embodiment, when the lid 5 and the cylindrical body 3 and the main body 2 are accurately positioned and then the lid 5 is pressed downward, the inward ribs 33 of the cylindrical body 3 are deformed against elasticity and the main body 2 is deformed. The cylinder 3 is attached to the main body 2 over the two outward ribs 32. In this state, since the guide portion 33a and the stopper portion 33b exist on the inward rib 33, the cylindrical body 3 is held in a state that does not rotate easily.
[0069]
The Left rotation the lid 5 with a certain force (twisting when), off the stopper portion 33b from the outward rib 32 by elastic deformation, then, as indicated by the chain line and two-dot chain line in FIG. 11, the inward The guide portion 33a of the rib 33 hits the adjacent outward rib 32 and is guided upward. For this reason, the cylinder 3 will be in the state which floats from the main body 2, As a result, the cylinder 3 can be extracted and removed.
[0070]
In addition, you may provide the stopper part 33b of low height in the both ends of the inward rib 33. FIG. In this case, the lid 5 can be removed from the main body 2 by forcibly rotating the cylindrical body 3 in either the left or right direction to release the engagement between the inward ribs 33 and the outward ribs 32.
[0071]
In this embodiment, since the cylinder 3 can be attached to the main body 2 only by pressing the lid 5 in the axial direction, there is an advantage that the assembly efficiency of the cap is good.
[0072]
Even when the cylindrical body 3 is attached to the main body 2 by screw means, when the cap is assembled, the screw between the main body 2 and the cylindrical body 3 can be obtained by tapping the lid 5 and moving the cylindrical body 3 in the axial direction. it is possible to screwing means (. for rotating the cylindrical body 3 only during removal).
[0075]
(10). Others This embodiment can be embodied in various ways other than the above embodiment.
[0076]
For example, the weakening line is not limited to being formed in a thin shape, and may be perforated. Also, the tabs can be embodied in various shapes other than those shown.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment.
FIG. 2 is a longitudinal front view of the first embodiment in use.
FIG. 3 is a separated front view of the second embodiment.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a diagram showing a third embodiment.
FIG. 6 is a plan view of a fourth embodiment.
FIG. 7 is a front view of a fourth embodiment.
FIG. 8 is a diagram showing a fifth embodiment.
FIG. 9 is a diagram showing a sixth embodiment.
FIG. 10 is a longitudinal front view of a seventh embodiment.
11 is a cross-sectional view taken along the line XI-XI in FIG.
12 is a partially broken bottom view taken along line XII-XII in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bottle mouth 2 Main body 3 Cylinder body 4 Hinge 5 Lid 6 Outer cylinder 8 Outlet 10, 24 Male screw as an example of engaging means 19 Projection of outer cylinder 20 Recess 21 Tab 23 Weak line

Claims (1)

It consists of a main body provided with a spout, a cylindrical body fitted to the main body from the outside, and a lid integrally connected to the cylindrical body via a hinge, and the cylindrical body can be removed from the main body when rotated. Is fitted to the main body so that the outlet of the main body is closed by the lid,
The main body has an outer cylinder that is attached to the bottle mouth from the outside by forced fitting with a stopper, and the cylindrical body is outside with the lower end of the outer cylinder exposed to the outer cylinder of the main body. A protruding ridge projecting radially outward is formed at the exposed lower end portion of the outer cylinder, and by dividing the ridge in a recess penetrating vertically, a circumferential direction is obtained. A tab that extends and has a base connected to the ridge is formed, so that the tab is exposed below the cylinder, and the outer cylinder of the main body is torn by pulling the tab. A weakening line for extending the vicinity of the base of the tab as a starting end,
Synthetic resin cap.

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