JP2005200069A - Engagement structure of container and cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal can and a resin cap which reduce the frictional resistance of a contact part between a container and the cap and make it possible to smoothly rotate or detach the cap. <P>SOLUTION: A wavy engagement part 5 and projections 5a which freely slidably engage with projections 4a formed on the internal circumferential face of the resin cap 3, are formed around the mouth 2 of a metal can 1. In addition, a groove 2a which engages with a projection 3b formed on the internal circumferential face of the resin cap 3, is formed in the mouth 2 of the metal can 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an engagement structure between a container and a cap. More specifically, the friction resistance of a contact portion between the container and the cap is reduced, deformation due to wear of the contact portion is prevented, and the cap can be rotated and removed smoothly. The present invention relates to a featured metal can and resin cap engagement structure.

Conventionally, there are various engagement structures as the engagement structure between the resin container and the resin cap. As shown in FIG. 9, the annular wall 54 of the resin cap 53 is engaged with the flange portion 52 of the mouth portion 51 of the resin container 50. That is, when the resin cap 53 is attached to the resin container 50, if the resin cap 53 is pressed strongly, the annular wall 54 gets over the flange portion 52 of the mouth portion 51, and the protrusion 54 a is located below the flange portion 52. Engage elastically. When the resin cap is removed, when the resin cap 53 is rotated, the protrusion 54 a at the tip of the annular wall 54 rides on the tip of the protrusion wall 55 formed on the outer periphery of the resin container 50. The resin cap 53 can be removed from the resin container 50 by forcibly releasing the engagement between the protrusion 54 a and the flange portion 52.
Japanese Utility Model Publication No. 47-22906

However, such an engagement structure between the resin container and the resin cap has the following drawbacks.

(1) Since both the container and the cap are made of synthetic resin, when the cap is rotated at the time of attaching and detaching the cap, the friction resistance with the resin container is large, so that the wear and deformation of the contact portion are also large. There is. 9 and 10, since the frictional resistance of both contact portions of the protrusion 54a and the protruding wall 55 is large, there is a drawback that wear and deformation of both contact portions are also large.

(2) Moreover, since the frictional resistance of the contact portion is large, there is a drawback that when the cap is detached, the rotation of the cap cannot be smoothly rotated due to the frictional resistance.

(3) Since the flange portion 52 formed in the mouth portion 51 is formed at the lower portion of the mouth portion, the protrusion of the flange portion cannot be formed largely, and therefore, there is a disadvantage that the cap is easily detached naturally in a bag or the like. is there.

(4) The conventional aerosol can cap has a drawback that it is difficult for children, elderly people and the like to remove.

The present invention has been made paying attention to such conventional problems, and reduces the frictional resistance of the contact portion between the container and the cap, prevents deformation due to wear of the contact portion, and smoothly rotates and removes the cap. It is an object of the present invention to provide an engagement structure between a metal can and a resin cap that can be easily removed when it is intentionally removed.

  According to the first aspect of the present invention, a corrugated engagement portion and a protrusion are formed on the outer periphery of the mouth portion of the metal can so as to slidably engage with the protrusion formed on the inner peripheral surface of the resin cap. A metal can-resin cap engagement structure characterized in that a groove is formed in the mouth portion of the metal can to engage a protrusion formed on the inner surface of the peripheral wall of the resin cap. Since the container material is made of metal such as aluminum and the cap material is made of resin in this way, when the resin cap is rotated when the resin cap is attached or detached, the frictional resistance with the metal can is small, so contact Wear and deformation of the part is also small. Further, the resin cap can be rotated smoothly because the frictional resistance is small.

  According to a second aspect of the present invention, there is provided the metal according to the invention, wherein the protrusions of the corrugated engagement portion of the metal can and the protrusions of the resin cap are provided in a distributed manner at positions that divide the circumference into three equal parts. It is an engagement structure of a can and a resin cap. In particular, by forming the projections of the wavy engaging portion at three points in a dispersed manner, there is an effect that the cap can be detached and attached in a state where the balance is maintained without tilting and the resistance is low. If the amount is small, the resistance is small, but the cap is inclined. If the amount is large, the inclination is decreased, but the resistance is increased. The harmony point was adopted. In addition, as many projections as the number of equally dividing portions may be provided at positions equally divided into four equal parts and five equal parts.

  According to a third aspect of the present invention, there is provided an engagement structure between the metal can and the resin cap, wherein the engagement between the metal can and the resin cap is a point contact or a small surface contact. Since the area of both contact portions is not large as in the prior art, the frictional resistance is small, wear and deformation of the contact portions are small, and the rotation of the resin cap can be smoothly rotated. Further, since the groove portion of the metal can is formed at the upper end of the mouth portion, the protrusion of the protrusion formed on the inner surface of the peripheral wall of the resin cap can be formed large, and it can be made difficult to come off naturally.

According to a fourth aspect of the present invention, there is provided an engagement structure between a metal can and a resin cap, wherein the metal can is an aerosol can. By using it on the aerosol can cap,
Conventionally, the cap is forcibly pulled in the vertical direction and removed, but the cap can be removed with a small force by rotating the cap.

  According to the present invention, the frictional resistance of the contact portion between the container and the cap can be reduced, the deformation due to wear of the contact portion can be prevented, the cap can be smoothly rotated and removed, Therefore, there is an effect that it is easy to remove when it is intentionally removed.

  Next, the specific contents of the container-cap engagement structure of the present invention will be described with reference to the drawings. 1 and 2 are a plan view and a front view showing a metal can according to the present invention. 3 to 6 are a plan view and a perspective view showing a resin cap according to the present invention. FIG. 7 is an enlarged view when the metal can according to the present invention is an aerosol can, and is a view showing a state where the resin cap is engaged with the metal can. FIG. 8 is an enlarged view showing a state in which the protrusion of the resin cap is engaged with the groove of the metal can.

  1 and 2 are drawings showing Example 1 of a metal can according to the present invention, and FIGS. 3 and 4 are examples of a resin cap engaged with the metal can according to the present invention. On the outer periphery of the mouth portion 2 of the metal can 1, a wave-like engaging portion 5 is formed at the upper end of a cylindrical portion having an outer diameter slightly larger than the outer diameter of the mouth portion 2. As shown in FIG. 1, the corrugated engagement portion 5 is formed with protrusions 5 a at an angle of 90 degrees at a portion obtained by dividing the circumference of the inner surface into three equal parts. On the other hand, on the inner periphery of the resin cap 3, a wavy engagement portion 4 is formed at the lower end of a cylindrical portion that has an inner diameter slightly smaller than the inner diameter of the peripheral wall 3 a of the resin cap 3. In addition, a groove 2 a that engages a protrusion 3 b formed on the inner surface of the peripheral wall 3 a of the resin cap 3 is formed in the mouth 2 of the metal can 1. The corrugated engagement portion 4 is formed with protrusions 4 a at an angle of 60 degrees at a portion that divides the inner periphery into three equal parts. As the resin cap 3 rotates, the protrusion 4 a is corrugated on the metal can 1. It engages with the joint portion 5 and slides on the wavy engagement portion 5. When the protrusion 4a lifts the protrusion 5a of the wave-like engagement part 5, the engagement between the protrusion 3b on the inner surface of the peripheral wall 3a of the resin cap 3 and the groove 2a of the mouth part 2 is released as shown in FIG. . Then, the resin cap 3 can be removed from the metal can 1. When the resin cap 3 is fitted to the metal can 1, the protrusion 3 b on the inner surface of the peripheral wall 3 a of the resin cap 3 and the groove 2 a of the mouth portion 2 are simply engaged by simply pressing the resin cap 3 from above.

  5 and 6 are drawings showing Example 2 of the resin cap engaged with the metal can according to the present invention. The metal can 1 in Example 2 is the same as that in Example 1. The difference between the resin caps 3 and 13 of Example 1 and Example 2 is that Example 1 has a protrusion formed at 60 ° between the protruding part 4a and the protruding part 4a formed at a part which is divided into three equal parts. Whereas the child 3b is formed so as to be positioned, the second embodiment has a protrusion 13b formed at 60 ° at the same position as the protrusion 14a formed at the part to be equally divided into three. It is formed to be located.

FIG. 7 is a view showing Example 3 of a resin cap engaged with a metal can according to the present invention.
The third embodiment is an engagement structure characterized in that the engagement between the metal can 1 and the resin caps 3 and 13 is point contact or small surface contact. The engagement structure between the metal can 1 and the resin caps 3 and 13
By making point contact or small surface contact, the frictional resistance between the protrusion 4a and the corrugated engagement portion 5 of the metal can 1 during rotation of the resin caps 3 and 13 is reduced. Therefore, wear and deformation of these portions are reduced, and the resin caps 3 and 13 are smoothly rotated.

FIG. 8 is a drawing showing a fourth embodiment according to the present invention. This Example 4 is an example when the metal can 1 is the aerosol can 1a. By rotating the resin caps 3 and 13, the caps can be removed without difficulty with a small force. Of course, you may apply the engagement structure of the container and cap which concern on this invention to normal metal cans other than the aerosol can 1a.

As an example of use of the present invention, by applying it to a container used by children, elderly people, etc., the cap can be rotated and removed smoothly, and it is difficult to remove naturally. Can be widely used as an engagement structure between the container and the cap.

It is a top view which shows the metal can which concerns on this invention. It is a front view of the metal can which concerns on this invention. It is a top view which shows Example 1 of the resin cap which concerns on this invention. It is a perspective view which shows Example 1 of the resin cap which concerns on this invention. It is a top view which shows Example 2 of the resin cap of this invention. It is a perspective view which shows Example 2 of the resin cap of this invention. It is a partial expanded sectional view which shows the engagement state of the metal can and resin cap of Example 3 which concerns on this invention. It is drawing which shows Example 4 of this invention, and is a drawing which showed the case where a metal can is an aerosol can. It is drawing which shows the conventional engagement structure of a container and a cap. It is an expanded sectional view which shows the conventional engagement structure of a container and a cap.

Explanation of symbols

1 Metal can 1a Aerosol can 2 Mouth
2a Groove part 3 Resin cap 3a Peripheral wall 3b Projector 4 Wave-like engagement part 4a Projection part 5 Wave-like engagement part 5a Projection part

Claims (4)

On the outer periphery of the mouth portion of the metal can, a wavy engagement portion and a protrusion portion are formed which are slidably engaged with the protrusion portion formed on the inner peripheral surface of the resin cap, and at the mouth portion of the metal can, An engagement structure between a metal can and a resin cap, wherein a groove is formed to engage a protrusion formed on an inner surface of a peripheral wall.
2. The metal can and the resin cap according to claim 1, wherein the protrusions of the corrugated engagement portion of the metal can and the protrusions of the resin cap are provided at positions that divide the circumference into three equal parts. Engagement structure.
The engagement structure between the metal can and the resin cap according to claim 1, wherein the engagement between the metal can and the resin cap is a point contact or a small surface contact.
The said metal can is an aerosol can, The engagement structure of the metal can and resin cap of Claims 1-3 characterized by the above-mentioned.

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