JP5875305B2 - Pull open cap - Google Patents

Description

  The present invention is a cap that is used by being attached to a container, and is a pull-open type cap (hereinafter referred to as a pull-open cap) having a gripping portion for tearing a planned opening portion defined by a score on the top wall of the main body. About).

  The pull-open cap has been widely known for a long time, but generally, the cap body has a top wall that covers the mouth of the container and a planned opening section defined by a score (weakening section) formed on the top wall. A gripping part (for example, a pull ring, etc.) for tearing is provided, and while the container contents can be securely sealed and protected by the top wall, the top part can be opened by tearing the planned opening part of the top wall by the gripping part. The wall can be opened (for example, see Patent Document 1).

  In the pull-open cap, it is preferable that the planned opening portion is easy to tear so that the user can easily open the top wall. In order to easily tear off the planned opening portion of the pull-open cap, first, it is conceivable to make the score thinner. However, in the case of a pull-open cap, the occurrence of unintentional breakage in the score is prevented to ensure that the container contents can be sealed and protected until the user opens the top wall, including the distribution stage. However, if the score is made thinner, the necessary strength may not be obtained. Further, when the score is made thinner, there is a molding problem that the possibility of pinholes occurring during molding is increased.

  In fact, Japanese Utility Model Publication No. 6-44812 (Patent Document 2) relates to the spout, but at the position of the bottom surface of the sealing surface portion and at the position of the pulling base of the pull main pillar, A technique having a thin portion that is slightly thicker than the thin portion for opening in an orthogonal direction is disclosed. According to this technique, when pulling the pull ring, the upper surface side of the base portion of the pull main column is in a compressed state and the opposite lower surface side is in a pulled state due to the thin portion perpendicular to the pull direction, so that the pull main column is in the pulling direction. The thin-walled portion that is inclined to the lower surface side of the sealing surface portion and that is perpendicular to the pulling direction is opened, whereby the thin-walled portion for opening is pulled, and the breakage is assisted. Accordingly, it is understood that the opening can be easily torn without making the thin-walled portion thinner. However, in such a technique, the pull main column is tilted and the upper surface side of the base portion is compressed, and in addition, the compressed state on the upper surface side is further strengthened by opening the thin portion on the lower surface side. Become. For this reason, the thin portion for opening tends to break, but when pulling the pull ring, the base of the pull column in a compressed state becomes resistance, and as a result, it may be difficult to tear off the sealing surface portion. It was.

Japanese Utility Model Publication No.59-121357 Japanese Utility Model Publication No. 6-44812

  In view of the circumstances described above, an object of the present invention is to provide a pull-open cap that can easily tear off the planned opening without thinning the score defining the planned opening.

The present invention provides a pull-open cap provided with a planned opening portion partitioned by a score on a top wall of a cap body and a gripping portion supported by a support column erected on the upper surface of the planned opening portion. the upper surface of the portion to be provided with a groove to assist breakage of the score, the groove, in a plan view while being formed continuously in the vertical and the base inner surface of the strut, a predetermined distance in the line of the score The pull open cap is characterized in that it extends so as to be placed and the inner surface of the groove is formed in a curved surface .

The present invention is the pull open cap characterized in that the support column has a reinforcing rib on the inner side surface, and the groove portion is further formed continuously with the inner side surface of the reinforcing rib.

  Moreover, this invention is a pull open cap characterized by the said groove part extending substantially arc shape in planar view.

The present invention, serial grooves, at positions adjacent to the inside of the reinforcing ribs, in a plan view, in the pull-open cap, characterized in that it further includes a portion extending so as to surround the side surfaces of the reinforcing ribs is there.

  This invention is provided with a groove portion formed adjacent to the base portion of the support column supporting the grip portion on the upper surface of the planned opening portion, so that when the user grips the grip portion and tears the planned opening portion, It is difficult for a compressed state to occur at the base of the support column, and the grip portion can be pulled while avoiding resistance due to compression of the base of the support column. In addition, since the planned opening portion is easily deformed through the groove portion, the surrounding portion of the base portion of the support can be deformed by following the pulling of the grip portion, thereby assisting in breaking the score. be able to.

  Therefore, this invention can provide the pull open cap which can tear off an opening plan part easily, without making the score which divides a plan opening part thin.

1 shows an embodiment of a pull-open cap of the present invention and is a plan view of a cap body. FIG. 2 is a cross-sectional view taken along line AA of FIG. Another embodiment of the pull open cap of this invention is shown, and it is a top view of a cap main body. It is the same as the above and is a BB line sectional view of FIG.

  The case of applying the embodiment of the pull open cap of the present invention to a so-called screw cap will be described with reference to the drawings. The present invention can be applied to a hinge cap as long as it is a pull-open cap.

[First embodiment]
First, based on FIG.1 and FIG.2, the pull open cap 1-1 of 1st Embodiment is demonstrated. 1 and 2 show only the cap body, and an upper lid (not shown) is screwed onto the cap body.

  The cap body 2 is provided with an outer cylinder part 3 and an inner cylinder part 4 that constitute a fitting part with the container mouth part, and a ceiling wall 5 that seals the container mouth part from the upper surface.

  The top wall 5 is provided with a planned opening 6 serving as an opening for extraction, which is partitioned by a score 6s. In the present embodiment, the score 6s is formed thinly by a recess extending in an annular shape on the lower surface 5b of the top wall 5, and defines a circular opening planned portion. .

  A support column 8 that supports the ring-shaped gripping portion 7 that constitutes the tearing means for the score 6s is erected on the upper surface 6a of the planned opening portion 6 so that the outer surface 8b of the support column 8 is positioned immediately above the score 6s. The grip 6 is pulled, and the score 6s is sequentially broken in the direction of the guide arrow A1 (the direction of the center 6c of the planned opening 6) formed on the upper surface 6a of the planned opening 6 to open the planned opening 6 It can be removed to form an opening.

  And the pull ring cap 1-1 of this embodiment is provided with the groove part 9 formed in the upper surface 6a of the opening plan part 6 so that it might adjoin the base 8c of the support | pillar 8. As shown in FIG.

  Specifically, the groove portion 9 is provided inside the base portion 8c of the support column 8. When the user grips and pulls the grip portion 7, the base portion 8c of the support column 8 is hardly compressed. It is possible to pull the gripping portion 7 while avoiding the resistance due to the compression of the base portion 8c, and to pull the gripping portion 7 because the planned opening portion 6 is easily deformed through the groove portion 9. The peripheral portion of the base portion 8c of the support column 8 can be deformed, thereby assisting in breaking the score 6s.

  In addition, the groove part 9 in this Embodiment is comprised as follows in detail.

That is, as apparent from FIG. 2, the groove 9 is a recess formed in the upper surface 6 a of the planned opening 6, and its inner surface 9 c is continuous with the inner surface 8 a of the support column 8 in the vertical direction. . Thereby, a level | step difference does not arise between the base 8c of the support | pillar 8, and the groove part 9 provided in the inside, but the resistance at the time of pulling the holding part 7 can be avoided effectively .

  Further, the inner surface 9c of the groove portion 9 is formed in a curved shape, so that the groove portion 9 itself is not easily broken.

  Further, the groove portion 9 is formed so as to follow the score 6s line at a certain interval. Specifically, the groove portion 9 has a substantially arc shape along the circular score 6s in plan view. It has been formed. As a result, when the user grips and pulls the grip portion 7, the planned opening portion 6 is easily deformed, and the breaking of the score 6 s can be efficiently assisted. In addition, the groove part 9 is not limited only to the above circular scores, but can be applied to the planned opening part divided by various scores, such as an ellipse and a rhombus. In such a case, the groove part 9 should just be formed along the score 6s, and does not necessarily need to form an arc shape.

  Further, the groove 9 has a longitudinal angle so that the central angle θ determined by the longitudinal end positions 9a and 9b and the center 6c position of the planned opening 6 is 30 degrees or more (45 degrees in the illustrated example). It has an extending range of directions. As a result, the breaking of the score 6s can be efficiently assisted.

  Further, the groove 9 is formed so that the depth of the recess is in the range of 30% to 70% of the thickness of the top wall 5 (50% in the illustrated example). That is, if it exceeds this range, the sealing performance of the top wall 5 that seals the container mouth portion by the groove portion 9 may be lowered, and further, the groove portion 9 itself may be broken, or less than this range. If it is, the deformation of the planned opening 6 due to the provision of the groove 9 becomes insufficient, and a sufficient effect may not be obtained.

[Second Embodiment]
Next, based on FIG.3 and FIG.4, the pull open cap 1-2 of 2nd Embodiment is demonstrated. The difference of the second embodiment from the first embodiment is that the column 8 has reinforcing ribs 8d on the inner side surface 8a, and the groove 9 has the reinforcing ribs 8d in plan view. It is a point including the part 9d extended so that it may surround, About the same structure between both, the same drawing is attached | subjected and the description is abbreviate | omitted.

  The pull-open cap 1-2 has a reinforcing rib 8d provided on the inner side surface 8a of the support column 8 so as to protrude inwardly therefrom. Thereby, when the user grips the grip portion 7 and tears the planned opening portion 6, it is possible to prevent the support 8 itself from being broken.

  And as for the pull open cap 1-2, although the groove part 9 makes a substantially arc shape like the groove part 9 of 1st Embodiment as a whole in planar view, it adjoins the inner side of the rib 8d for reinforcement. A portion 9d extending in a U-shape so as to surround the reinforcing rib 8d is provided at a location. In the present embodiment, the inner surface 9e of the portion 9d of the groove 9 is formed so as to be continuous with the inner surface 8e of the reinforcing rib 8d.

  As described above, the pull-open cap 1-2 has the portion 9d that the groove portion 9 extends so as to surround the reinforcing rib 8d even if the support column 8 has the reinforcing rib 8d on the inner surface 8a. Therefore, like the pull-open cap 1-1 of the first embodiment, when the user grips the grip portion 7 and tears the planned opening portion 6, the base portion 8c of the support column 8 is less likely to be compressed. In addition, the grip portion 7 can be pulled while not receiving resistance due to the compression of the base portion 8c of the support column 8, and the planned opening portion 6 is easily deformed through the groove portion 9, so that the grip portion 7, the peripheral portion of the base portion 8c of the support column 8 can be deformed by following the pulling, thereby assisting the breaking 6s of the score.

  In the present embodiment, the groove 9 has a portion 9d extending in a U shape so as to surround the side surface of the reinforcing rib 8d, but the shape of the portion 9d surrounds the side surface of the reinforcing rib 8d. Of course, other shapes may be used as long as they can be formed.

[Experimental example]
Finally, experimental examples will be described. In the experiment, the pull open cap of the present invention was used as Example 1, and a cap (having the configuration of the first embodiment) provided with a groove formed on the upper surface of the planned opening portion adjacent to the base of the support column was used. In addition, as Comparative Example 1, a cap that is not subjected to any processing such as a groove is used for a planned opening portion assuming a normal pull-open cap, and further, as Comparative Example 2, the technique of the spout described in Patent Document 2 is assumed. And what has the groove part orthogonal to the pulling direction of a holding part in the lower surface of the opening scheduled part was used. Then, in order to evaluate the force required for opening each, a hook was attached to the ring-shaped gripping part, and the maximum strength when the score was broken was measured by pulling in the vertical direction (90 ° direction) and oblique 45 ° direction. . In addition, Shimadzu Corporation autograph (trademark) was used for the measurement.

  The experimental results are as shown in Tables 1 and 2, and the load peaks are indicated by P1 to P3, respectively. In the pulling test in the 90 ° direction shown in Table 1, the peak values of Example 1 and Comparative Example 2 are small, and the force required at the time of opening is reduced compared to Comparative Example 1 where no processing is performed. It can be confirmed. Next, when Example 1 and Comparative Example 2 are compared, the peak values are almost the same, but after exceeding the peak (that is, after the break in the score), it is apparent from the waveform of the graph. Thus, it can be seen that Comparative Example 2 has a smaller drop width and a higher resistance than Example 1.

  Next, in the diagonal 45 ° direction tensile test shown in Table 2, Comparative Example 1 and Comparative Example 2 have substantially the same peak value, whereas only Example 1 has a small peak value, and the force required for opening is small. It can be seen that there is a reduction.

  From the above, it was confirmed that Example 1 had an effect because the force required for opening was reduced in both cases of pulling in the 90 ° direction and oblique 45 ° direction.

  In the experimental example, a cap having a top wall provided substantially horizontally with respect to the center axis of the cap is used. However, in the embodiment of the present invention, the top wall is provided with an inclined portion, and the user holds the grip portion vertically. It may be formed such that when it is pulled in the direction (90 ° direction), the pulling force acts obliquely upward (45 ° direction).

1-1 to 1-2: Pull open cap 2: Cap body 3: Outer cylinder part 4: Inner cylinder part 5: Top wall 6: Opening planned part 6a: Upper surface 6c: Center 6s: Score 7: Grasping part 8: Post 8a: Inner surface 8b: Outer surface 8c: Base 8d: Reinforcing rib 8e: Inner surface 9: Groove 9a: End 9b: End 9c: Inner surface 9d: Part 9e: Inner surface

Claims (4)

In the pull-open cap provided on the top wall of the cap body with a planned opening portion defined by the score and a gripping portion supported by a support column erected on the upper surface of the planned opening portion,
The upper surface of the opening portion to be provided with a groove to assist breakage of the score,
The groove portion is formed to be continuous with the base inner side surface of the support column in the vertical direction and extends along the score line at a predetermined interval in plan view, and the inner surface of the groove portion is a curved surface Pull open cap characterized by being formed in a shape . Said post has a reinforcing rib on the inner surface, the groove, pull open cap according to claim 1, characterized in that it is formed continuously further down the inner surface of the該補for strong ribs. 3. The pull-open according to claim 2 , wherein the groove portion further includes a portion extending so as to surround a side surface of the reinforcing rib in a plan view at a location adjacent to the inner side of the reinforcing rib. cap. The pull-open cap according to any one of claims 1 to 3, wherein the groove portion extends in a substantially arc shape in a plan view .

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