JP4481555B2 - container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container to which a cap is screwed. More specifically, the present invention relates to a container having a cap reversal prevention function, a slip-out prevention function, and an unauthorized opening detection function.
[0002]
[Prior art]
The cap screwed onto the container may reversely come off, come off, or be unsealed.
Therefore, in order to solve such a problem, the following container is used (see Japanese Utility Model Publication No. 7-38165).
An anti-reverse protrusion is provided below the outer peripheral surface of the mouth-and-neck part, an anti-reverse locking part is provided at the end of the anti-reverse protrusion, the lower end of the anti-reverse protrusion is used as an anti-retraction step, and is screwed to the mouth-neck part. The fixing ring is connected to the lower part of the cap to be able to break through the connecting part, and the fixing ring is provided with a locking protrusion that gets over the reverse rotation preventing protrusion and locks to the reverse rotation preventing locking part. A container provided with an inward projection to be locked to the part.
[0003]
[Problems to be solved by the invention]
In the conventional example, a slip-out prevention step is provided at the lower end of the reverse rotation prevention protrusion. Therefore, when the inward projection of the cap is locked to the lower end, the fixing ring comes into contact with the base end of the mouth and neck, that is, the shoulder of the container body. The fixing ring does not drop and does not move. Therefore, when the cap is screwed into the mouth and neck again, the position of the fixing ring does not change, so it is difficult to clearly know whether or not the connecting portion is broken, that is, whether or not it has been tampered with.
[0004]
Therefore, in order to solve this problem, it is conceivable to lengthen the mouth and neck, but if this is done, the container becomes large and the appearance is not preferable.
[0005]
The inward projection is formed in an annular shape and enters and locks into the escape prevention step. For this reason, when separating and collecting, it is difficult to remove the fixing ring with a finger, so that it must be pulled out by using an instrument such as a plier. Therefore, the sorting work is troublesome and the work efficiency is poor.
[0006]
Further, the cap is injection-molded using a mold including a slide core for forming a fixing ring. When releasing, the cap is pulled out while supporting the fixing ring with the slide core. The amount of movement is largely regulated. For this reason, the inward projection is difficult to be removed from the mold, and therefore, it is pulled with a large force. Then, the problem of breakage of the cap occurs.
[0007]
In view of the above circumstances, an object of the present invention is to make sure that tampering is detected. Another object of the present invention is to make it difficult for the fixing ring to come off from the container mouth portion before the collection of separation, and to easily remove it during the collection of separation. Yet another object is to improve the releasability of the inward projection.
[0008]
[Means for Solving the Problems]
According to the present invention, a male screw is provided above the outer peripheral surface of the mouth / neck portion of a container having a cap, and the vertical outer surface extending in the axial direction of the mouth / neck portion and the vertical outer surface are provided below the outer peripheral surface of the mouth / neck portion. the reverse rotation preventing projection provided with an arcuate outer surface that continuously provided, a vertical outer surface of the reverse rotation preventing projection and backstop retaining portion is provided with a female screw to be screwed to the external thread on the inner peripheral surface of the cap, the cap A fixing ring is connected to the lower portion of the fixing ring via a weakening connecting portion, and when the cap is rotated in the direction of sealing the cap on the inner peripheral surface of the fixing ring, the anti-reverse protrusion is overcome and locked to the anti-reverse locking portion. A container provided with a locking projection; a drop guide vertical groove for guiding the drop of the fixing ring is provided at a tip of the reverse rotation prevention protrusion, and an upper locking portion is provided at an upper end side of the drop guide vertical groove. provided, on the inner circumferential surface of the fixing ring, the cap Is inserted into the drop guide longitudinal groove by rolling, characterized in that a inward projection for locking the upper locking portion.
[0009]
The upper stage latching part of this invention is located in the upper end side of the reverse rotation prevention protrusion, It is characterized by the above-mentioned. The drop guide longitudinal groove of the present invention is characterized by including a lower-stage locking portion. The lower locking portion of the present invention is located on the lower end side of the reverse rotation preventing projection.
[0010]
The present invention is characterized in that the inward projections are formed of a plurality of arc-shaped projections formed at intervals in the circumferential direction and extending in the circumferential direction . The rear end of the arc-shaped projection of the present invention is continuous with the locking projection, and the tip thereof is continuous with the small protruding portion of the arc-shaped protruding portion or the extraction portion which is a missing portion. Features.
[0011]
The protrusion amounts of the plurality of arc-shaped protrusions according to the present invention are different. According to the present invention, the protruding amount of the arc-shaped protrusion in the sliding direction of the slide core forming the fixing ring of the cap is larger than the protruding amount of the other arc-shaped protrusion.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor has studied and repeated experiments on how to ensure that the fixing ring falls when tampering with opening without lengthening the mouth and neck.
As a result, it has been found that it is sufficient to form a drop guide vertical groove at the tip of the reverse rotation prevention protrusion.
[0013]
The vertical groove is provided with an upper locking portion on the upper surface side of the reverse rotation preventing protrusion, and the inward protrusion of the cap is locked to the upper locking portion. And if the weakening connection part is cut | disconnected at the time of an unauthorized opening, since a fixed ring will fall reliably along a fall guide vertical groove, the displacement of a fixed ring can be recognized reliably.
[0014]
Note that it is only necessary that the fixing ring can be surely dropped when the weakened connecting portion is cut. Therefore, the lower end of the drop guide vertical groove may be extended to the lower end of the anti-reverse protrusion and the lower locking portion may be omitted.
[0015]
The present inventor considered that the reason why the fixing ring is difficult to come off during the separate collection is that the inward projection is formed over the entire circumference of the fixing ring.
Therefore, the inward projection of the fixing ring is constituted by a plurality of arc-shaped projections, the rear end of each arc-shaped projection is made continuous with the locking projection, and the tip is made continuous with the extraction portion. If it does in this way, if a fixed ring is turned to a predetermined direction and an extraction part is made to oppose a fall guide vertical groove, this fixed ring can be extracted easily.
Note that the number of the arc-shaped protrusions may be one, and the arc-shaped protrusions do not necessarily have to be connected to the locking protrusions, and may be slightly apart, for example.
[0016]
When the cap is injection-molded and the mold is opened, the inventor determines that the opening width of the slide core for forming the fixing ring is larger in the sliding direction part of the slide core than the other direction part. noticed. Therefore, the projecting amount of the arc-shaped projecting portion positioned in the sliding direction is made larger than the arc-shaped projecting portion positioned in the other direction so that the opening width and the projecting amount correspond to improve the mold release property.
[0017]
【Example】
A first embodiment of the present invention will be described with reference to FIGS.
A male screw 3 is provided on the upper outer peripheral surface of the mouth-and-neck portion 2 of the container 1, and a reverse rotation preventing projection 5 is provided on the lower part thereof.
[0018]
The reverse rotation prevention protrusion 5 includes a vertical outer surface VF, an arcuate outer surface CF continuous to the vertical outer surface VF, a reverse rotation prevention locking portion 6, and a drop guide vertical groove 7.
The reverse rotation prevention locking portion 6 is formed on the vertical outer surface VF of the protrusion 5, and the drop guide vertical groove 7 includes an upper locking portion 7a and a lower locking portion 7b.
[0019]
The upper locking portion 7a is formed on the upper end side of the protrusion 5, and the lower locking portion 7b is positioned between the upper end and the lower end 5b. The position of the lower locking portion 7b is appropriately selected as necessary. For example, the lower locking portion 7b may be formed on the lower end 5b side, but the lower locking portion 7b is omitted, and the drop guide vertical groove 7 is You may extend to the lower end 5b of the protrusion 5. FIG.
[0020]
A female screw 13 that is screwed into the male screw 3 is provided at the upper part of the inner peripheral surface of the cap 10, and a fixing ring 15 is connected to the lower part of the cap 10 via a weakening connecting part 14.
[0021]
On the inner peripheral surface of the fixing ring 15, there are provided a locking projection 16 that locks to the reverse rotation prevention locking portion 6 and an inward projection 17 that locks to the upper locking portion 7 a.
[0022]
Next, the operation of this embodiment will be described.
When the cap 10 is rotated in a predetermined direction and screwed onto the mouth-neck portion 2 of the container 1 and sealed, the locking protrusion 16 of the fixing ring 15 moves over the reverse rotation prevention protrusion 5 and moves to the reverse rotation prevention locking portion 6 side. Further, the inward projection 17 is locked to the upper locking portion 7 a of the drop guide vertical groove 7.
[0023]
When the cap 10 is rotated in the opposite direction and opened, the weakening connecting portion 14 is pulled and the fixing ring 15 is rotated. In the middle of this, the locking projection 16 contacts the reverse rotation preventing locking portion 6. Because it touches, it can no longer rotate. Therefore, the weakening connecting portion 14 is cut, and the fixing ring 15 falls along the drop guide longitudinal groove 7. Then, when the inward projection 17 abuts on the lower locking portion 7b, the dropping of the fixing ring 15 stops. At this time, the position of the fixing ring 15 is separated from the original position by the distance H, that is, the length of the drop guide vertical groove.
[0024]
When the cap 10 is screwed again to the mouth-and-neck portion 2 of the container 1, the position of the fixing ring 15 is separated from the original position by a distance H, so that it can be surely known that the tampering has occurred.
[0025]
When the contents are poured into a cup or the like with the cap 10 removed, the container 1 is tilted, but the inward projection 17 of the fixing ring 10 is locked to the upper locking portion 7a of the drop guide vertical groove 7, so that the fixing ring 10 falls off the container 1 and does not enter the cup.
At the time of separation and collection, the fixing ring 15 is rotated in a predetermined direction, for example, rotated about 20 degrees clockwise. Then, the inward projection 17 is detached from the drop guide vertical groove 7, so that when the fixing ring 15 is pushed upward with a finger, it is easily detached from the mouth-and-neck portion 2.
[0026]
A second embodiment of the present invention will be described with reference to FIGS. 7 to 9. The same reference numerals as those in FIGS. 1 to 6 have the same names and functions.
Since the difference between this embodiment and the first embodiment is mainly in the inward projection, this will be described in detail below.
[0027]
The cap 10 is formed by injecting molten synthetic resin into the mold 20. The mold 20 includes a slide core 21, a stripper bush 22, a core bush 23, and a screw core 25.
The slide core 21 is a member forming the outer surface of the fixing ring 15 of the cap 10, the stripper bush 22 is a member forming the lower surface of the fixing ring 15, and the core bush 23 is forming the inner surface of the fixing ring 15 and the inward projection 17. The member, the screw core 23, is a member that is provided inside the core bush 23 and forms the top plate of the cap 10.
[0028]
The core bush 23 is provided with a first recess and a second recess. The first recesses are for forming the locking projections 16, and a plurality of the first recesses are provided at intervals in the circumferential direction. The second recess is for forming arcuate projections 17a, 17b, 17c constituting the inward projection 17, and a plurality of the second recesses are provided at intervals in the circumferential direction.
[0029]
The rear end of the second recess is continuous with the first recess, but the tip thereof is separated from the adjacent first recess.
Of the plurality of second recesses, the width of the second recess located in the sliding direction A21 of the slide core 21 is formed larger than the width of the other second recess.
[0030]
When an injection device (not shown) is driven to inject molten synthetic resin from the gate G into the mold 20, the cap 10 is formed, and a plurality of locking protrusions 16 are formed on the inner peripheral surface of the fixing ring 15. Arc-shaped protrusions 17a, 17b, and 17c are formed.
[0031]
At this time, the protruding amount t1 of the arcuate protrusion 17a located in the sliding direction A21 of the slide core 21 is larger than the protruding amounts t2 and t3 of the other arcuate protrusions 17b and 17c, for example, t1 = 0,6 mm. Further, the protruding amount t2 of the arcuate protrusion 17b is larger than the protruding amount t3 of the arcuate protrusion 17c, for example, t2 = 0,5 mm, t3 = 0,4 mm.
[0032]
The rear ends 17k of the arcuate projections 17a to 17c are continuous with the locking projections 16, and the leading ends 17s thereof are continuous with the adjacent locking projections 16 through the extraction portions 24.
The extraction portion 24 is a missing portion of the arc-shaped protrusion and is formed to be larger than the circumferential width of the drop guide vertical groove 7. In addition, the front-end | tip part of the arc-shaped projection parts 17a-17c is formed in the circular arc surface in order to attain smooth engagement / disengagement.
[0033]
When the cap 10 in the mold 20 cools and hardens, the mold 20 is opened and the cap 10 is taken out.
At this time, the slide core 21 slides in the direction of arrow A21. If the cap 10 is not supported by the slide core 21, the cap 10 rotates together when the screw core 25 rotates and is released from the cap 10. . Therefore, the slide core 21 cannot be completely separated from the fixing ring 15.
[0034]
Therefore, a predetermined distance w, for example, w = 0,75 mm, is slid so as to be in a state as shown in FIG. 9, so that between the outer peripheral surface 15 m of the fixing ring 15 and the inner peripheral surface 21 n of the slide score 21. The interval, that is, the opening width s becomes non-uniform.
[0035]
The opening width s is the largest in the direction of the arrow A21, that is, on the arcuate protrusion 17a side, for example, s1 = 0.74 mm, for example, and on the other arcuate protrusion 17b side, for example, s2 = 0.60 mm. The arcuate protrusion 17c side has, for example, s3 = 0.43 mm.
[0036]
However, as described above, the protruding amounts t1 to t3 of the arcuate protrusions 17a to 17c are different from each other, and the protruding amounts t1 to t3 correspond to the opening widths s1 to s3. It can be carried out.
[0037]
At the time of separation and collection, the fixing ring 15 is rotated in a predetermined direction, for example, rotated about 20 degrees clockwise. Then, the arc-shaped protrusions 17a, 17b, and 17c are detached from the drop guide vertical groove 7, and the extraction portion 24 is opposed to the drop guide vertical groove 7. In this state, when the fixing ring 15 is pushed upward with a finger, it is detached from the mouth-and-neck portion 2, so that it can be easily separated and collected without using an instrument or the like.
A third embodiment of the present invention will be described with reference to FIGS. 10 and 11. The same reference numerals as those in FIGS. 7 to 9 have the same names and functions.
The difference between this embodiment and the second embodiment is that only two arc-shaped projections 17a constituting the inward projection 17 are provided point-symmetrically. The amount is appropriately selected as necessary.
In this embodiment, the inward projection 17 is provided on the lower surface side of the fixing ring 15.
[0039]
A fourth embodiment of the present invention will be described with reference to FIG. 12. The same reference numerals as those in FIGS. 10 and 11 have the same names and functions.
The difference between this embodiment and the third embodiment is that six arc-shaped projections constituting the inward projection 17 are provided, and the arc-shaped projections 17x, 17y, 17z are adjacent to each other. That is, it extends between the locking projections 16 and 16.
Since the protruding amount of the arcuate protrusions 17x, 17y, 17z on the front end 17s side is extremely small compared to the protruding amount of the rear end 17k, the front end 17s side has a function of the extraction portion. become.
[0040]
The embodiment of the present invention is not limited to the above. For example, instead of continuing the rear end of the arc-shaped projection portion to the locking projection, the two may be slightly separated from each other. Instead of providing a plurality, one may be provided.
[0041]
【The invention's effect】
Since the present invention is provided with the drop guide vertical groove, when the weakened connecting portion is cut, the inward projection moves along the drop guide vertical groove, and the fixing ring is reliably dropped. Therefore, when the cap is screwed again to the mouth-and-neck portion, the fixing ring is positioned below the original position and is greatly separated from the lower end of the cap.
In addition, when the container is tilted when the contents are poured into a cup or the like with the cap removed, the inward projection of the fixing ring is locked to the upper locking portion of the drop guide vertical groove, so that the fixing ring is Will not fall into the cup.
[0042]
Since the inward projection of the present invention is provided with the extraction portion, it can be easily removed by turning the fixing ring in a predetermined direction at the time of separating and collecting the extraction portion so as to face the drop guide vertical groove.
[0043]
Of the plurality of arc-shaped projections of the present invention, the projection amount of the arc-shaped projection portion in the sliding direction of the slide core is larger than that of the other arc-shaped projection portions, so the projection amount corresponding to the opening width of the mold It becomes. Therefore, mold release can be performed smoothly and the locked state can be reliably maintained.
[Brief description of the drawings]
FIG. 1 is a plan view of a container showing a first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a partial cross-sectional front view of a cap.
FIG. 4 is a bottom view of the cap.
FIG. 5 is an enlarged vertical cross-sectional view of a state where a cap is attached to a container.
6 is a reduced view of a cross-sectional view taken along the line VI-VI in FIG. 5;
FIG. 7 is an enlarged longitudinal sectional view showing a second embodiment of the present invention, corresponding to FIG.
FIG. 8 is a longitudinal sectional view of a cap manufacturing apparatus.
9 is a diagram showing a main part of an enlarged sectional view taken along line IX-IX in FIG. 8;
FIG. 10 is a longitudinal sectional view showing a third embodiment of the present invention, corresponding to FIG.
FIG. 11 is a bottom view of the cap.
FIG. 12 is a bottom view showing a fourth embodiment of the present invention and corresponding to FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Container 2 Mouth neck part 3 Male screw 5 Reverse rotation prevention protrusion 6 Reverse rotation prevention locking part 7 Falling guide vertical groove 10 Cap 13 Female screw 14 Weakening connection part 15 Fixing ring 16 Locking protrusion 17 Inward protrusion 17a Arc-shaped protrusion part 17b circle Arc-shaped protrusion 17c Arc-shaped protrusion 20 Mold 21 Slide core 24 Extraction part

Claims (8)

A male screw is provided above the outer peripheral surface of the mouth and neck portion of the container provided with the cap, and a vertical outer surface extending in the axial direction of the mouth and neck portion and an arc shape continuous to the vertical outer surface are provided below the outer peripheral surface of the mouth and neck portion. the reverse rotation preventing projection having an outer surface provided with vertical outer surface of the reverse rotation preventing projection and backstop retaining portion is provided with a female screw to be screwed to the external thread on the inner peripheral surface of the cap, it weakened at the bottom of the cap A locking protrusion that connects the fixing ring via the connecting portion, and that rotates on the inner peripheral surface of the fixing ring in a direction to seal the cap, gets over the reverse rotation prevention protrusion and locks to the reverse rotation prevention locking portion. A container provided with;
A drop guide vertical groove that guides the drop of the fixing ring is provided at the tip of the reverse rotation prevention protrusion , an upper locking portion is provided on the upper end side of the drop guide vertical groove, and the inner periphery of the fixing ring A container provided with an inward projection that is inserted into the drop guide vertical groove by rotation of a cap and is locked to the upper locking portion. A container according to claim 1, wherein the upper engagement portion, characterized in that it is located at the upper side of the reverse rotation preventing projection.   The container according to claim 1, wherein the drop guide longitudinal groove includes a lower stage locking portion.   The container according to claim 3, wherein the lower locking portion is located on the lower end side of the reverse rotation preventing protrusion. The container according to claim 1 , wherein the inward projections are formed of a plurality of arc-shaped projections formed at intervals in the circumferential direction and extending in the circumferential direction .   The rear end of the arc-shaped protrusion is continuous with the locking protrusion, and the tip thereof is continuous with the small protruding portion of the arc-shaped protruding portion or the extraction portion which is a missing portion. The container according to claim 5.   The container according to claim 5, wherein the protruding amounts of the plurality of arcuate protrusions are different.   The container according to claim 7, wherein the protruding amount of the arc-shaped protruding portion in the sliding direction of the slide core that forms the fixing ring of the cap is larger than the protruding amount of the other arc-shaped protruding portions.

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