JPH0834460A - Apparatus for opening/closing container - Google Patents

Abstract

PURPOSE:To obtain an opening/closing apparatus for a container which exhibits flexibility at the time of mounting a cap to smoothly come over a protrusion while exhibiting rigidity at the time of unscrewing so that a coupled part can be immediately and clearly broken, wherein an appearance is not ugly after the cap is removed. CONSTITUTION:A lower end 5 of a cylinder 3 of a cap 14 is integrally provided with a ring 7 via an easy-to-break coupling piece 6, and numerous locking pieces 10 having a slope which is wider as coming upward whose thickness is constant entirely and having a swollen part like a protrusion and an arc inward in a radial direction are provided slantly upward on an inner side 8 at a lower end of the ring 7, while both upper ends of the locking part 10 are connected to each other and a thin film is formed between the locking parts 10 and the ring 7 to constitute the cap 14. A thread is formed on a mouth of a container, and a circular protrusion to be locked with the locking part is provided. Then a weakened line vertically across the ring 7, the locking parts 10, the thin film or the like is provided on them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container opening / closing device. More specifically, the present invention relates to a container opening / closing device having a pill fur proof function.

[0002]

2. Description of the Related Art Conventionally, there are many prior arts of this kind of container opening / closing device having a pill fur proof function, but one example is as follows. Japanese Examined Patent Publication No. 5-55386, No. 57-9240, No. 56-125848, No. 62-11745, No. 62-17545, all of which have almost the same structure. Taking an example, FIG.
And is formed as shown in FIG. In both figures, 51 is the mouth portion of the container, 52 is a screw cap having a screw (not shown) that is screwed into the mouth portion 51, and a band 55 is provided on the skirt 53 through a bridge 54 that is easily broken. There is. Reference numeral 56 is a stop ring provided via a hinge 57 provided inside the band 55, and is formed so that the upper end portion is thicker. Reference numeral 58 is an upper bead formed on the mouth portion 51, and 59 is a lower bead. In the container opening / closing device thus formed, when the screw cap 52 is attached, the stop ring 56 elastically deforms to pass over the upper bead 58 and descends. As shown in
The upper beads 58 are engaged with each other in the vertical direction. When the screw cap 52 is unscrewed to be unlawfully opened, the band 55 cannot be lifted due to the above-mentioned locking, so that the bridge 54 is broken, and the band 55 falls to show improper opening. There is.

[0003]

However, the above-mentioned type of pilfer proof function switchgear generally has the following common problems. When the screw cap 52 is unscrewed by the consumer or the like, it is required that the stop ring 56 is expanded in the circumferential direction when it crosses over the upper bead 58 in the lower direction, so that the screw cap 52 is unscrewed by the consumer or the like. Is required to be rigid. The reason is that consumers are trying to open this cap and the bridge 5
In the case of breaking 4, the stop ring 56 is elastically deformed by flexibility, and the reaction force of breaking the bridge 54 is unlikely to occur, which gives the consumer a frustrating discomfort that the break does not occur easily. In this case, it is preferable that the stop ring 56 has high rigidity so that the bridge 54 is refreshed immediately when the screw cap 52 is unscrewed. That is, the stop ring 56 has the contradictory problem that both flexibility and rigidity are required.

The stop ring 56 of the invention described in JP-B-5-55386 has a thick upper portion as shown in the drawing because of the required rigidity, and has a required flexibility. In order to reduce the thickness, the hinge 5
The portion 8 is formed to be the thinnest. However, the stop ring 56 also has flexibility because it is formed thinner toward the lower side as described above, and when the consumer or the like releases the screw, the lower portion of the stop ring 56 is elastically deformed,
The bridge 54 does not break during this elastic deformation, and the bridge 54 finally breaks when the limit of elastic deformation is reached.
Therefore, the consumer or the like feels discomfort because the breakage does not easily occur even if a force is applied to release the screw.

Another problem is the stop ring 56.
Although not shown in the figure, it is formed diagonally downward during this screw cap molding, and is then formed by inverting it obliquely upward, but a large force is required because it is not easily inverted during this inversion. Another problem is that when the screw cap 52 is opened and removed, the stop ring 55 remains at the mouth 51 of the container, which makes the appearance unaesthetic.

The present invention has been made in order to solve the above-mentioned various problems, and its purpose is to exhibit flexibility and elastically deform when a screw cap is attached to a container, so that the portion corresponding to the upper bead 58 can be easily mounted. (EN) Provided is a container opening / closing device having a stop ring (56) equivalent portion which can be crossed and which can exhibit a rigidity when a consumer or the like releases the screw and immediately and refreshably breaks the bridge equivalent portion. That is.

Another object of the present invention is to provide a container opening / closing device which can be reversed more easily than the conventional stop ring 56 when the part corresponding to the stop ring 56 is reversed after being formed. Still another object is to make the stop ring 56 capable of coping with variations in size that occur when manufacturing the container mouth or the cap.
An object is to provide a container opening / closing device having a corresponding portion. Another object is to provide a container opening / closing device that can remove the stop ring 55 corresponding part when the screw cap 52 corresponding part is opened and removed, and can improve the appearance of the container mouth. It is a thing.

[0008]

The container opening / closing device of the present invention which achieves the above-mentioned object is described as follows: a top wall 1 made of a synthetic resin and an internal screw provided integrally with the top wall 1. A cap main body 4 composed of a tubular portion 3 having a strip 2; a ring 7 integrally provided on a lower end portion 5 of the tubular portion 3 via a fragile connecting piece 6; diagonally upward from an inner lower portion 8 of the ring 7. A locking member having a swelling portion 9 that is formed to have a constant thickness as a whole, has a slope that becomes wider toward the upper side, and is convex inward in the radial direction and that bulges in an arc shape. Part 1
0; a connecting portion 12 that integrally connects both end portions 11, 11 of the upper portion of each locking portion 10; a thin film 13 formed between the locking portions 10 and an inner lower portion 8 of the ring 7; Synthetic resin cap 14 formed by the structure; An annular protrusion 18 that has a screw groove 17 that engages with the thread 2 on the outer periphery 16 of the mouth portion 15 and that vertically engages with the locking portion 10. A container opening / closing device, characterized in that it comprises a container 19; In addition, the ring 7 and the locking portion 10, or the ring 7
The locking portion 10 and the thin film 13 are the opening and closing device for the container, which has a weakening line 30 that crosses them vertically.

Further, a cap main body 4 composed of a synthetic resin top wall 1 and a tubular portion 3 integrally provided on the top wall 1 and having a thread 2 inside thereof; a lower end portion 5 of the tubular portion 3; A ring 7 integrally provided via a connecting piece 6 which is easily broken;
A large number of bulges are formed obliquely upward from the inner lower part 8 of the bulge, are formed to have a constant thickness as a whole, have a slope that becomes wider toward the upper side, and are convex inward in the radial direction and bulge in an arc shape. Locking portion 10 having protrusions 9; Thin film 13 formed between the locking portions 10 and the inner lower portion 8 of the ring 7; Synthetic resin cap 21 formed by the above configuration; Mouth portion A container 19 having a thread groove 17 to be screwed with the thread 2 on the outer periphery 16 of 15 and having an annular protrusion 18 that vertically engages with the locking portion 10. It is a switchgear. In addition, the ring 7 and the locking portion 10, or the ring 7
And thin film 13, or the ring 7, locking portion 10 and thin film 13
Is a device for opening and closing the container, which has a weakening line 30 that crosses them in the vertical direction.

[0010]

Since the container opening / closing device of the present invention is configured as described above, the cap 14 is attached to the mouth portion 15 of the container.
The locking portion 10 with the annular protrusion 1 of the container mouth portion 15.
In order to get over 8 downward, the locking portion 10 is provided obliquely upward from the inner lower portion 8 of the ring, and is convex inward in the radial direction and bulged in an arc shape. The projecting portion 9 is elastically deformed by the projection 18, is turned outward in the radial direction, and is swollen outward, so that the projecting portion 9 can effectively get over the annular projection 18 of the container mouth portion 15 downward. The locking portion 10 that has passed over the protrusion 18 and protruded to the lower side thereof bulges inward in the radial direction in an arc shape on the lower side of the protrusion 18 due to the return of the elastic deformation, and is locked to the protrusion 18 in the vertical direction. To do. In this case, since the locking portion 10 bulges inward in the radial direction in an arc shape, it can deeply enter the lower side of the protrusion 18. Therefore, when the cap 14 is unscrewed, the locking does not come off.

Next, when an authorized user such as a consumer releases the cap 14 from the screwed state, the upper portion of the engaging portion 10 is provided with the projection 1.
Push up the lower surface of 8. In this case, since the locking portion 10 bulges inward in the radial direction in an arc shape, the locking portion 10 has a planar arc shape and has a high vertical compression strength, that is, a high vertical rigidity. Therefore, when the protrusion 18 is pushed up from the bottom, the reaction force generated at that time almost immediately reaches the connecting piece 6 via the ring 7, so that the connecting piece 6 is broken almost immediately and the connecting piece 6 is easily broken by a consumer or the like. No, it can be refreshedly broken without giving the discomfort as in the conventional example. The above-described operation of the locking portion 10 is substantially the same regardless of whether the both end portions 11, 11 of the locking portion 10 are connected to each other 12 or not. However, when the protrusions 10 are not connected to each other, the thin film 13 is easily stretched when the protrusions 10 are crossed over, so that the thin films 13 are more easily crossed over.

Next, the locking portion 10 is formed as described above. When injection molding, although not shown, it is formed diagonally downward and then inverted upward. In this case, the locking portion 10 has an inclination that becomes wider toward the distal end, the proximal ends are spaced apart from each other, and only have the thin film 13 between them, so that they are easily bent, and they are inverted with less force than the conventional one. Can be made.

Further, since the locking portion 10 bulges inward in the radial direction in an arc shape, even if there are large and small variations in manufacturing the mouth portion 15 and the cap 14 of the container, the locking portion in that case. The bulging portion 9 of 10 can be elastically deformed in the radial direction to absorb the variation and deal with it. Further, after the cap main body 4 is removed, the ring 7 remains in the mouth portion 15 of the container 19 together with the locking portion 10, but the ring 7 is formed by using the weakening line 30 thereof.
It can be removed from the container, and the appearance of the mouth 15 of the container 14 can be eliminated.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 4 is a cap main body, which is composed of a cylindrical portion 3 integrally provided on a circular top wall 1 made of synthetic resin such as polyethylene or polypropylene. Reference numeral 2 is a thread formed inside the tubular portion 3. A ring 7 is integrally provided on the lower end portion 5 of the tubular portion 3 via a plurality of connecting pieces 6 that are easily broken. A plurality of locking portions 10 are integrally provided from the lower portion 8 on the inside of the ring 7 and obliquely upward, and as shown in FIG. Is formed into a convex shape and is bulged 9 in an arc shape so as to be convex inward in the radial direction. As shown in FIGS. 2 and 3, this locking portion 10 integrally connects both upper end portions 11 and 12 thereof.
Is formed. And between each locking portion 10 and the ring 7
A thin film 13 is integrally formed between the lower portions 8 of the. This thin film 13 can be released from the mold even if a large number of locking portions 10 as described above are formed at the time of injection molding of the cap because of the thin film 13. Reference numeral 14 is a synthetic resin cap thus formed.

Next, in FIG. 1, reference numeral 19 denotes a container, which is a synthetic resin, for example, a polypropylene bottle. However, this bottle can be made of glass. Reference numeral 15 denotes a mouth portion of the container 19, and a screw groove 17 which is screwed with the thread 2 is formed on the outer periphery 16 of the mouth portion. An annular protrusion 18 is formed below the thread groove 17. The diameter of the protrusion 18 is larger than that of the upper portion of the locking portion 10. As shown in FIGS.
By reversing the bulging portion 9 at the time of mounting,
The protrusion 18 can be passed over downward. Further, the above-mentioned engaging portion 10 which has passed over the projection 18 downwardly bulges inward in the radial direction again due to the return of elastic deformation, and the projection 1
It is adapted to engage with the protrusion 18 in the vertical direction from the lower side of 8. 2, 9 and 12, reference numeral 30 denotes a weakening line formed by vertically crossing the ring 7, the thin film 13 and the locking portion 10, which is the ring 7 and the locking portion 10 in the vertical direction. May be formed across. The weakening line 30 is formed of a groove, a perforation, a separated portion, or the like, or may be formed by combining them. In FIG. 9, only the ring 7 and the thin film 13 are vertically crossed.

FIG. 4 is a view taken along line 27-27 of FIG.
5 is a view taken along line 28-28 of FIG. The locking portion 10 may be formed in various shapes as shown in FIGS. 6 to 8 in addition to the substantially inverted triangular shape as shown in FIG. Next, FIG. 9 to FIG. 11 show another embodiment of the present invention, and most of the configuration is the same as that of FIG.
5 is similar to that shown in FIG. 5, except that the upper portions of the locking portions 10 are not connected to each other as shown in FIGS. 9 and 11 and are provided on the ring 7 independently of each other. . In addition, the thin film 13 also has a missing portion 23 at its upper end
Has been formed.

In FIGS. 1, 2, and 9, reference numeral 24 is a protrusion formed on the ring 7, and the cap 14 is attached to the container 1.
When the lock portion 10 is mounted on the mouth portion 15 of the connector 9, the lock portion 10 contacts the lower portion of the cylindrical portion 3 of the cap main body 4 when the projection 18 is passed over the protrusion 18, so that the connecting piece 6 can be prevented from being damaged. .

When the cap 14 of this embodiment is attached to the mouth portion 15 of the container 19, the locking portion 1 bulged inward in an arc shape.
0 is elastically deformed by the protrusion 18 of the mouth portion 15 and is inverted outward in the radial direction, so that the protrusion 18
Get over. In this case, as shown in FIGS. 13 to 15, the locking portion 10 is gradually pushed outward in the circumferential direction from the central portion 25 of the arc-shaped bulging portion 9 in the circumferential direction. From then on, it is pushed outward in the radial direction so that it can be smoothly and surely inverted. Locking part 1
When the engagement portion 10 of 0, which is over the projection 18 is completed and the engagement portion 10 comes out to the lower side of the projection 18, the engagement portion 10 again bulges inward in the radial direction due to the return of the elastic deformation, and the central portion 2
5 can go deep into the protrusion 18. Therefore, there is no possibility that the cap 14 may come off when the cap 14 is unscrewed. If the cap 14 is opened improperly, the ring 7 cannot be lifted due to the locking, so that the connecting piece 6 breaks, and this breakage indicates improper opening.

Next, when the consumer or the like normally opens, the locking portion 10 does not disengage from the projection 18 because the locking portion 10 bulges inward in the radial direction and is locked inward in the radial direction below the projection 18. Since it bulges 9 in an arc shape and has a high vertical compression strength, elastic deformation in the vertical direction is extremely small. Therefore, when a tensile load is applied to the connecting piece 6 as the cap body 4 rises, the bridge 54 does not easily break due to the vertical elastic deformation of the stop ring 56 as shown in the conventional example. There is no discomfort, and it can be immediately and exhilaratingly broken.

[0020]

Since the container opening / closing device is configured as described above, when the cap 14 is unfastened unintentionally when the cap 14 is attached to the mouth portion 15 of the container, the connecting piece is disconnected. 6 can be broken to indicate unauthorized opening. Further, since the locking portion 10 of the cap 14 is configured as described above, when the cap 14 is mounted, the bulging portion 9 is flipped from the inner side to the outer side in the radial direction to exhibit flexibility, which is smooth and effective. Since the protrusion 18 can be passed over and the consumer or the like normally opens the cap 14, the locking portion 10 has a shape in which the bulging portion 9 increases the vertical compression strength. Since the bridge 54 is not easily broken due to the flexibility of this portion as shown in the conventional example, the connecting piece 6 can be broken almost immediately and exhilaratingly when the screwing is released.

That is, it is possible to provide a container opening / closing device having a locking portion 10 which has both flexibility and rigidity which could not be solved as a contradictory problem in the past. In addition, the locking portion 10 is first formed downward, and then it is inverted and formed. However, in this case, since the locking portion 10 is formed with an inclination that becomes narrower toward the lower side, Locking part 1
Since the thin film 13 is formed between 0s, it can be easily reversed with a force smaller than that of the conventional equivalent portion of the same locking portion. Further, since the locking portion 10 has the bulging portion 9 that bulges inward in the radial direction, even if the dimensional variation occurs during the manufacture of the mouth portion 15 of the container 19 or the cap 14, the variation portion is not affected. Can accept and respond.
Also, after removing the cap main body 4, the mouth portion 15 of the container 19
Although the ring 7 remains with the locking portion 10, the ring 7, the locking portion 10, etc. are
It can be removed from the mouth portion 15 of the container 19, and thus, the appearance of the mouth portion 15 of the container 19 can be eliminated.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a container opening / closing device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the cap of the container opening / closing device.

FIG. 3 is a bottom view of the cap of the container opening / closing device.

FIG. 4 is a view taken along line 27-27 of FIG.

5 is a view taken along line 28-28 of FIG.

FIG. 6 is a front view of a cap portion of the container opening / closing device according to another embodiment of the present invention.

FIG. 7 shows still another embodiment of the present invention and corresponds to FIG.

FIG. 8 is a view showing still another embodiment of the present invention and corresponds to FIG.

FIG. 9 is a partial cross-sectional view of the cap of the container opening / closing device according to still another embodiment of the present invention.

FIG. 10 is a partial view of the container of the container opening / closing device according to the embodiment of the present invention.

11 is a bottom view of the cap shown in FIG. 9. FIG.

FIG. 12 is an enlarged perspective sectional view of a part of FIG.

FIG. 13 is a view for explaining the operation of the container opening / closing device of the present invention.

FIG. 14 is a view for explaining the operation of showing the next step in FIG.

FIG. 15 is a view for explaining the operation of showing the next step in FIG.

FIG. 16 is a partial cross-sectional view of a conventional container opening / closing device of the same type as the present invention.

FIG. 17 is a diagram showing the next state of the operation shown in FIG. 16 of the apparatus shown in FIG. 16;

[Explanation of symbols]

 1 Top Wall 2 Screw Thread 3 Cylindrical Part 4 Cap Main Body 5 Lower End Part 6 Connecting Piece 7 Ring 8 Inner Lower Part 9 Bulging Part 10 Locking Part 11 Both Side Ends of Upper Part 12 Connection Part 13 Thin Film 14 Cap 15 Mouth Part 16 Outer Perimeter 17 Spiral groove 18 Protrusion 19 Container 21 Cap 30 Weakening line

Claims (4)

[Claims] 1. A cap main body 4 comprising a synthetic resin top wall 1 and a tubular portion 3 integrally provided on the top wall 1 and having a thread 2 inside thereof; a lower end portion 5 of the tubular portion 3; A ring 7 integrally provided via a connecting piece 6 that is easily broken; a large number of rings 7 are provided obliquely upward from an inner lower portion 8 of the ring 7, and the whole is formed to have a constant thickness and becomes wider toward the upper side. Locking portion 10 having a swelling portion, which has a swelling portion that is inclined and is convex inward in the radial direction and that bulges in an arc shape; both side end portions 11, 11 of the upper portion of each locking portion 10 are integrally connected. Connection part 12; thin film 13 formed between each locking part 10 and inner lower part 8 of the ring 7; synthetic resin cap 14 formed by the above structure; 2 has a thread groove 17 to be screwed with, and has an annular protrusion 18 that vertically engages with the locking portion 10. A container opening / closing device comprising a container 19; 2. The container opening / closing device according to claim 1, wherein the ring 7 and the locking portion 10, or the ring 7 and the locking portion 10 and the thin film 13 have a weakening line 30 that crosses them in the vertical direction. . 3. A cap main body 4 comprising a synthetic resin top wall 1 and a tubular part 3 integrally provided on the top wall 1 and having a thread 2 inside; a lower end 5 of the tubular part 3; A ring 7 integrally provided via a connecting piece 6 that is easily broken; a large number of rings 7 are provided obliquely upward from an inner lower portion 8 of the ring 7, and the whole is formed to have a constant thickness and becomes wider toward the upper side. Locking portions 10 each having an inclination and a convex portion radially inwardly and having a bulging portion 9 bulging in an arc shape; formed between the locking portions 10 and between the inner lower portion 8 of the ring 7. The thin film 13 formed; the synthetic resin cap 21 formed by the above configuration; the outer periphery 16 of the mouth portion 15 having the screw groove 17 to be screwed with the thread 2; A container opening / closing device, characterized in that it comprises a container 19 having a mating annular projection 18. 4. A ring 7 and a locking portion 10, or a ring 7 and a thin film 13, or a ring 7, a locking portion 10 and a thin film 1.
The container opening / closing device according to claim 3, wherein 3 has a weakening line 30 that crosses them in the vertical direction.