JP4673232B2 - Container lid - Google Patents

Description

  The present invention relates to a container lid that is applied to a mouth and neck portion of a container having a locking jaw portion formed on an outer peripheral surface.

As a beverage container, a glass, synthetic resin, or metal container having a mouth and neck portion having a locking jaw portion formed on the outer peripheral surface is widely used in practical use. And as a container lid applied to the mouth-and-neck part of such a container, the following patent document 1 discloses a metal container lid having a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall. ing. The lower end portion of the skirt wall is formed with a breakable line extending in the circumferential direction except for a specific region in the circumferential direction. In addition, a pair of breakable lines are formed that extend upward from both sides of the specific area, and then extend to the top wall. When such a container lid is attached to the mouth and neck of the container and the mouth and neck are sealed, the container lid is fitted on the mouth and neck, and then the skirt is just above the breakable line extending in the circumferential direction. The wall is displaced inward in the radial direction, whereby the skirt wall is locked to the locking jaw of the mouth and neck and the breakable line extending in the circumferential direction is broken. When removing the container lid from the container neck and opening the container neck, the arc-shaped part generated at the lower end of the skirt wall is forced upward by breaking the circumferential break line. The breakable line formed on the skirt wall and the top wall is broken by the above, the lock of the skirt wall with respect to the lock jaw of the mouth and neck is released, and the container lid is detached from the mouth and neck.
Japanese Patent Publication No.55-34072

  However, the container lid disclosed in Patent Document 1 has the following problems to be solved. First, when the container lid is attached to the mouth and neck of the container, it is necessary to break the break line extending in the circumferential direction, but the break edge generated by the break of the break line is exposed as it is. Therefore, when the container lid is formed from a relatively inexpensive steel sheet or the like, rust is generated on the exposed broken edge without being subjected to appropriate rust prevention treatment. Second, when the container lid is removed from the container neck, the finger is placed on the arc-shaped part generated at the lower end of the skirt wall by breaking the circumferential break line, and the arc-shaped part is moved upward. Therefore, it is necessary to force the finger, so that the finger touches a sharp broken edge existing in the arc-shaped portion, and there is a high possibility that the finger is damaged.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is a novel and solved problem of the occurrence of rust and finger damage present in the container lid disclosed in Patent Document 1. It is to provide an improved container lid.

  As a result of diligent study, the inventor has made a metal body having a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a synthetic resin connected by embedding the lower end of the skirt wall of the metal body. The above-mentioned main technical problem is obtained by forming the container lid from the additional member made of plastic and forming a breaking line extending in the circumferential direction in the synthetic resin additional member that is broken when the container lid is attached to the mouth and neck of the container. I found that I can achieve it.

That is, according to the present invention, the container lid for achieving the main technical problem includes a metal main body and a synthetic resin additional member,
The metal body has a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, and at least the skirt wall from a pair of circumferentially spaced break start points at the lower end of the skirt wall. A pair of breakable lines extending upward are formed,
The synthetic resin additional member has a cylindrical shape, and a lower end portion of the skirt wall of the metal main body is embedded in an upper portion of the synthetic resin additional member, and an upper portion of the synthetic resin additional member is A breakable line extending in the circumferential direction is formed except for a portion corresponding to a position between the pair of break start points at the lower end of the skirt wall,
It is fitted to the mouth and neck of the container having a locking jaw formed on the outer peripheral surface, and the lower end of the skirt wall of the metal body and the upper part of the synthetic resin addition member are displaced radially inward. The breakable line of the synthetic resin additional member is broken while being locked to the locking jaw of the mouth and neck of the container,
A container lid is provided.

  Preferably, the metal main body has a tongue piece extending from the pair of break starting points at the lower end of the skirt wall, and the tongue piece is also embedded in the synthetic resin additional member. A plurality of ribs projecting inward in the radial direction are formed at intervals in the circumferential direction on the inner peripheral surface of the synthetic resin additional member, and the breakable line of the synthetic resin additional member is: Except for the portion of the synthetic resin additional member corresponding to the pair of fracture start points, a cutting blade is applied from the outer peripheral surface of the synthetic resin additional member to allow the upper portion of the synthetic resin additional member to It is preferable to form by cutting at least a part of the film.

  In the container lid of the present invention, a circumferentially extending break line that is broken when the container lid is attached to the mouth and neck of the container is formed in the synthetic resin additional member, and a broken edge is generated in the metal body It will never be done. Therefore, there is no problem of occurrence of rust and finger damage present in the container lid disclosed in Patent Document 1. In addition, the lower end portion of the skirt wall of the metal main body is embedded in the synthetic resin additional member. Therefore, even when the cutting edge generated at the lower end of the skirt wall when forming the metal main body does not undergo rust prevention treatment or treatment such as curling the lower end portion of the skirt wall. There is no risk of it occurring.

  The preferred embodiment of a container lid constructed in accordance with the present invention will now be described in further detail with reference to the accompanying drawings.

FIG. 1 shows a preferred embodiment of a container lid constructed in accordance with the present invention. The container lid indicated by the whole number 2 is composed of a metal main body 4 and a synthetic resin additional member 6.

  1 and FIG. 2, the metal body 4, which can be formed from an appropriate metal thin plate such as a chromic steel plate, is suspended from the circular top wall 8 and the periphery of the top wall 8. And a cylindrical skirt wall 10. In the illustrated embodiment, the boundary region between the top wall 8 and the skirt wall 10 has an arc shape in the longitudinal sectional view. At the lower end of the skirt wall 10, an annular flange 12 protruding outward in the radial direction is attached. Furthermore, in a specific region in the circumferential direction, a tongue piece 14 that hangs downward from the outer end of the annular flange 12 is formed. The tongue piece 14 is conveniently present over an angular region of the order of 40 to 80 degrees. The tongue piece 14 is advantageously formed with a pair of holes 15. As clearly understood by referring to FIG. 3 in conjunction with FIG. 1, the metal body 4 passes through the annular flange 12 and the skirt wall 10 from a pair of break starting points 16 located on both sides of the base end of the tongue piece 14. A pair of breakable lines 18 are formed that extend through the top wall 8 and then to the boundary region between the top wall 8 and the skirt wall 10 on the diametrically opposite side. Such a breakable line 18 can be constituted by a so-called score in which the thickness of the material is locally reduced.

  As clearly shown in FIGS. 1 and 2, a liner 20 that can be formed from an appropriate synthetic resin such as soft polyethylene is disposed on the inner surface of the top wall 8 of the metal main body 4. The liner 20 can be conveniently formed by supplying a soft or molten synthetic resin material to the inner surface of the top wall 8 and embossing the synthetic resin material into a required shape. The liner 20 in the illustrated embodiment is generally disk-shaped, the central portion 22 is thin, and an inner annular seal protrusion 24 and an outer annular seal protrusion 26 projecting downward are formed at the peripheral edge. .

  The description will be continued with reference to FIG. 1. The synthetic resin-made additional member 6 that can be formed from an appropriate synthetic resin such as polypropylene and hard polyethylene has a cylindrical shape as a whole. An annular projecting portion 28 projecting inward in the radial direction is formed at the upper end portion of the synthetic resin additional member 6. In the specific region in the circumferential direction, an additional protrusion 30 that extends further downward is continuously attached to the annular protrusion 28. This specific region corresponds to a region where the tongue piece 14 is formed in the metal main body 4, that is, a region between the pair of break start points 16, as will be apparent from the following description. Except for the specific region, a breakable line 32 is disposed on the synthetic resin addition member 6. More specifically, the lower surface of the annular protrusion 28 defines an annular shoulder surface 33 facing downward. A plurality of ribs 34 extending downward from the annular shoulder surface 33 are formed on the inner peripheral surface of the synthetic resin additional member 6 at intervals in the circumferential direction. A cut 36 is formed in the upper part of the synthetic resin additional member 6 by cutting with a cutting blade (not shown) from the outer peripheral surface. This notch 36 reaches the outer peripheral portion of each of the ribs 34, but the inner peripheral portion of the rib 34 remains without being cut and defines a brittle portion 38 that can be broken, and thus a plurality of breakable portions are possible. A breakable line 32 including a bridging portion 38 is provided. In the illustrated embodiment, the notch 36 is formed over the entire circumferential direction, but in the specific region, there is no brittle portion that can be broken because the additional protrusion 30 is present. If desired, the formation of the notch 36 can be omitted in the specific region. An annular protrusion 39 having a substantially semicircular cross section is formed at the lower portion of the outer peripheral surface of the synthetic resin additional member 6. As clearly understood by referring to FIG. 1, the synthetic resin additional member 6 in the illustrated embodiment has the lower end portion of the metal main body 4 positioned in a molding die (not shown). The lower end portion of the metal main body 4 including the tongue piece 14 is embedded in the upper portion of the synthetic resin additional member 6. The tongue piece 14 is embedded in the annular protrusion 28 and the additional protrusion 30.

  Referring to FIGS. 4 and 5 together with FIG. 1, the container lid 2 as described above is applied to the mouth-and-neck portion 40 of the container which can be formed from glass, synthetic resin or a metal thin plate. The mouth / neck portion 40 has a cylindrical shape as a whole, and a locking jaw portion 42 is formed at the upper end portion of the outer peripheral surface thereof. When the container lid 2 is attached to the mouth-and-neck portion 40 and the mouth-and-neck portion 40 is sealed, as shown in FIG. 4, the container lid 2 is fitted on the mouth-and-neck portion 40 and the annular pressing tool 44 is attached to the metal main body. The liner 20 is brought into close contact with the upper end surface of the mouth-and-neck portion 40 by acting on the outer peripheral edge of the top wall 8 and pressing downward. Then, while maintaining this state, the locking tool 46 is moved over the entire circumferential direction by acting on the upper end of the outer peripheral surface of the synthetic resin additional member 6, more specifically, immediately above the cut 36. Displace in the direction. Thus, the lower end portion of the skirt wall 10 of the metal main body 4 together with the upper end portion of the synthetic resin additional member 6 is locked to the locking jaw portion 42 of the mouth / neck portion 40. In addition to the specific region, the bridging portion 38 is broken, and a broken line 48 extending continuously in an arc shape is formed. In the specific region, the upper and lower portions of the synthetic resin additional member 6 are not separated from each other and are maintained in a continuous state.

When opening the mouth-and-neck part 40, as shown in FIG. 6, the lower part of the synthetic resin additional member 6 is gripped on the opposite side in the diameter direction of the specific region, and the arc-shaped part below the breaking line 48 is formed. Displace upward. Next, as shown in FIG. 7, a finger is put on the arc-shaped portion displaced upward and pulled upward or rearward (rightward in FIG. 7). Thus, since the lower end portion of the skirt wall 10 of the metal main body 4 and the tongue piece 14 are connected to the synthetic resin additional member 6 in the specific region, the tongue piece 14 of the metal main body 4 is also located upward or rearward. As a result, the breakable line 18 in the metal body 4 starts to break from the pair of break start points 16. Then, when breakage of the breakable line 18 progresses and the state shown in FIG. 8 is reached, the locking of the container lid 2 with respect to the locking jaw portion 42 of the mouth-and-neck portion 40 is released, and the entire container lid 2 becomes the mouth-and-neck. The mouth and neck part 40 is opened by being detached from the part 40.

Sectional drawing which shows suitable embodiment of the container lid comprised according to this invention. Sectional drawing which shows the metal main bodies of the container lid shown in FIG. The top view of the container lid of FIG. The fragmentary sectional view which shows the mode which mounts | wears with the container neck of FIG. Sectional drawing which shows the state which mounted | wore the mouth neck part of the container with the container lid of FIG. The front view which shows the detachment operation initial state at the time of detaching | releasing the container lid of FIG. 1 from the mouth neck part of a container. The front view which shows the removal operation middle state at the time of removing the container lid of FIG. 1 from the mouth neck part of a container. The front view which shows the removal operation final state at the time of detaching | releasing the container lid of FIG. 1 from the mouth neck part of a container.

Explanation of symbols

2: Container lid 4: Metal main body 6: Synthetic resin additional member 8: Top wall of the metal main body 10: Skirt wall of the metal main body 14: Tongue piece of the metal main body 16: Breaking start point of the metal main body 18 : Metal breakable line 32: Synthetic resin additional member breakable line 34: Synthetic resin additional member rib 40: Container neck and neck 42: Container neck and neck locking jaw 48: Synthesis Break line of resin-made additional members

Claims (3)

Including a metal body and a synthetic resin additional member,
The metal body has a circular top wall and a cylindrical skirt wall depending from the periphery of the top wall, and at least the skirt wall from a pair of circumferentially spaced break start points at the lower end of the skirt wall. A pair of breakable lines extending upward are formed,
The synthetic resin additional member has a cylindrical shape, and a lower end portion of the skirt wall of the metal main body is embedded in an upper portion of the synthetic resin additional member, and an upper portion of the synthetic resin additional member is A breakable line extending in the circumferential direction is formed except for a portion corresponding to a position between the pair of break start points at the lower end of the skirt wall,
It is fitted on the mouth and neck of the container having a locking jaw formed on the outer peripheral surface, and the lower end of the skirt wall of the metal body and the upper part of the synthetic resin addition member are displaced radially inward. The breakable line of the synthetic resin additional member is broken while being locked to the locking jaw of the mouth and neck of the container,
A container lid characterized by that.   2. The metal body according to claim 1, wherein the metal main body has a tongue piece extending from the pair of break starting points at the lower end of the skirt wall, and the tongue piece is also embedded in the synthetic resin additional member. Container lid.   A plurality of ribs projecting inward in the radial direction are formed at intervals in the circumferential direction on the inner peripheral surface of the synthetic resin additional member, and the breakable line of the synthetic resin additional member is: Except for the portion of the synthetic resin additional member corresponding to the pair of fracture start points, a cutting blade is applied from the outer peripheral surface of the synthetic resin additional member to allow the upper portion of the synthetic resin additional member to The container lid according to claim 1, wherein the container lid is formed by cutting at least a part of the container.

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