JP3119234U - Pull open cap - Google Patents

Abstract

[PROBLEMS] To improve the openability of a pull open cap.
A pour cylinder 17 standing on a top wall 13 of an outer cylinder 9 of a cap body 3, a blocking wall 20 for closing the pour cylinder, and a removal section 24 formed on the blocking wall. In the pull open cap 1 provided with a cut groove 22 and a pull ring erected on the removal part; a thick part 25 is provided on the peripheral edge of the removal part.
[Selection] Figure 3

Description

  The present invention relates to a cap attached to the mouth of a container, and more particularly to a pull open cap that pulls a pull ring to tear a kerf and form an opening in a blocking wall.

  The conventional pull-open cap is formed with a pouring cylinder standing on the top wall of the outer cylinder of the cap body, a blocking wall for closing the pouring cylinder, and the blocking wall, and the removal portion is divided into a circular shape. And a pull ring provided upright at the removal portion. With this cap, the pulling ring is pulled upward to tear the cut groove, cut off the removed portion, and form an opening in the blocking wall (for example, see Patent Document 1).

JP 2003-72811 A

  When the pull open cap pulls the pull ring to tear the kerf, the removal portion bends in an arc shape, so that the pulling force is dispersed, and a large pulling force is required continuously from the beginning to the end of the tearing. This means that even if an elderly person with weak force pulls the pull ring, the kerf cannot be cut smoothly, making it difficult to open.

  Especially for containers that contain solids such as tablets or containers that require a large amount of liquid content, a pull-open cap with a circular kerf that has the largest extraction opening is used. The seed cap has the following problems in terms of openability in addition to the above-mentioned problems. That is, the circular kerf is in a state in which tearing is extremely difficult to proceed because the tearing direction is transverse to the pulling direction of the pull ring in the tear start and end regions.

  In view of the above circumstances, an object of the present invention is to reduce the pulling force of the kerf during the opening process and to improve the opening performance.

  The device includes a pouring tube erected on a top wall of an outer tube of a cap body, a blocking wall that closes the pouring tube, a kerf that is formed in the blocking wall and defines a removal portion, In a pull open cap provided with a pull ring erected on the removal portion; reinforcing means is provided on a peripheral portion of the removal portion.

  The reinforcing means of this device is an annular thick part. The reinforcing means of this device is characterized by comprising a ring-shaped thick portion and a deformation regulating rib continuing to the thick portion. The deformation regulating rib according to the present invention is formed in a region including at least the vicinity of the proximal end of the pull ring. The kerf of this invention is formed in a circular shape.

  In this device, since the reinforcing means for restricting the bending of the removing portion is provided at the peripheral portion of the removing portion, when the pull ring is pulled in a predetermined direction, stress concentration is effectively generated in the kerf. Therefore, the kerf becomes easy to tear, so that the removed portion can be easily cut and opened.

A first embodiment of the present invention will be described with reference to FIGS.
The pull-open cap 1 includes a cap body 3, an upper lid 5 attached to the cap body 3, and a hinge 7 that connects the cap body 3 and the upper lid 5.

  The outer cylinder 9 and the inner cylinder 11 of the cap body 3 are connected via a top wall 13. A locking cylinder 15 is provided on the top surface of the top wall 13, and a dispensing cylinder 17 is erected on the inner side.

  The lower end of the pouring cylinder 17 is closed by a blocking wall 20. The blocking wall 20 is provided with an annular kerf 22, and the kerf 22 defines a removal portion 24. The kerfs 22 are formed in an inverted V-shaped cross section on the back side of the blocking wall 20. A thick portion 25 is provided at the peripheral portion of the removal portion 24.

  The thick portion 25 is a reinforcing means for restricting the deformation of the removing portion 24, and has an upper surface formed in an arc shape. The thick portion 25 protrudes from the upper surface 22a of the kerf 22, and the vicinity of the upper surface 22a of the kerf 22 is a V-shaped valley. The thick portion 25 can have an appropriate shape as long as the cross-sectional shape thereof is a trapezoidal shape or a triangular shape and the vicinity of the upper surface 22a of the kerf 22 is a V-shaped valley.

  A leg portion 29 of the pull ring 27 is erected on the peripheral portion of the removing portion 24. An arrow 30 indicating the pulling direction of the pull ring 27 is provided on the surface of the removal portion 24.

Next, the operation of this embodiment will be described.
Opening of the pull-open cap is similar to the conventional case. When the finger is applied to the pull ring 27 and pulled in the direction of the arrow 30, tearing of the kerf 22 near the leg 29 starts. Further, when the pull ring 27 is pulled in the same direction, the removal portion 24 is cut out and an opening for pouring is formed.

  At this time, the peripheral portion of the removal portion 24 is a thick portion, the deformation of the removal portion 24 is restricted, and the thick portion 25 protrudes from the upper surface 22a of the kerf 22, and the upper surface of the kerf 22 Since the vicinity of 22a is a V-shaped valley, stress concentration can be effectively generated in the kerf 22 and the kerf can be cut out smoothly.

  FIG. 4 shows changes in load when the cap of the present invention and the conventional cap are opened. In addition, the conventional cap and the cap of this invention are the same shapes except the thick part formed in the peripheral part of the removal part. Graph A is a cap shown in FIG. 3 of the present invention, and graph B is a conventional cap. In graphs A and B, not only the peak value of the load but also the difference in the waveform after the load peak can be noted. In A, the load drop after the first peak A1 is quick and smooth.

  In the conventional cap, the peak B2 appears after the peak B1, and the peak of the tear load is generally higher than A. The peak B2 appears when the tearing of the kerf is advanced after the start of the tearing of the kerf because the kerf formation direction is lateral to the pulling direction of the pull ring. It can be seen that in the cap A, the pulling force of the pull ring reaches the kerf directly by the reinforcing means, so that it does not appear in the graph A. Further, when comparing the total load required for opening, the graph A is smaller than the graph B, and it can be seen that the cap of the present invention can be opened more easily than the conventional cap.

  A second embodiment of the present invention will be described with reference to FIG. 5. The same reference numerals as those in FIGS. 1 to 4 have the same names and functions. The difference between this embodiment and the first embodiment is that, in addition to the annular thick portion 25 formed at the peripheral portion of the removal portion, a deformation regulating rib 31 is provided continuously.

  The deformation restricting rib 31 is formed in a cross shape and includes a vertical rib 31a and a horizontal rib 31b. One end of the vertical rib 31a is connected to the leg portion 29 of the pull ring in the vicinity of the tear start end, and the other end is positioned in the vicinity of the tear end of the kerf. Therefore, this rib 31a effectively restricts the deformation of the entire portion including the peripheral portion of the removal portion 24, and the pulling force of the pull ring reaches the kerf directly, so that the opening is facilitated. Further, as another preferred embodiment, the removal portion can be reduced without increasing the amount of resin to be used by reducing the thickness dimension of the removal portion in the region defined by the thick portion 25 and the deformation regulating rib 31. The bending deformation of the peripheral edge can be effectively restricted. In addition, the shape, thickness, etc. of rib 31a, 31b are suitably selected as needed.

1 is a plan view showing a first embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a figure which shows the load change at the time of opening. It is a removal part enlarged view which shows 2nd Embodiment of this invention.

Explanation of symbols

1 Pull Open Cap 3 Cap Body 20 Barrier Wall 22 Cut Groove 24 Removal Part 27 Pull Ring 29 Leg

Claims (5)

A pouring tube erected on the top wall of the outer cylinder of the cap body, a blocking wall for closing the pouring cylinder, a kerf formed on the blocking wall and defining a removing portion, and standing on the removing portion In a pull open cap with a provided pull ring;
A pull-open cap characterized in that a reinforcing means is provided at the peripheral edge of the removal portion.   2. The pull-open cap according to claim 1, wherein the reinforcing means is an annular thick portion.   2. The pull open cap according to claim 1, wherein the reinforcing means includes an annular thick portion and a deformation regulating rib continuous with the thick portion.   The pull open cap according to claim 3, wherein the deformation regulating rib is formed in a region including at least a vicinity of a proximal end of the pull ring.   5. The pull open cap according to claim 1, 2, 3, or 4, wherein the kerf is formed in a circular shape.

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