JP3200720B2 - Container lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a container such as a bottle which is used by being attached to the mouth of the container.

[0002]

2. Description of the Related Art The inventor of the present invention devised a lid of the same kind as shown in FIG. 5 and filed a utility model registration application.
(Japanese Utility Model Application No. 3-100705). Since the present invention is an improvement on the above-described invention, the invention will be described first.

In FIG. 5, a is a lid made of a synthetic resin, and is an inner lid as an example. Reference symbol b denotes a pipe member of the lid a, which is made of polyethylene terephthalate. In the member b, c denotes a pipe member for discharging a liquid or the like in the container 1;
Indicates an attachment portion for the container l.

The mounting portion d forms a mounting portion for a bottle mouth as an example, but may be formed in a flange shape when mounted on a carton or the like although not shown. Reference numeral e denotes an opening member, which is formed of a synthetic resin, for example, polyethylene, and includes a blocking wall f and a knob g provided on the blocking wall f.

[0005] Next, h is a projecting engagement portion formed inside the injection tube c, and i is a concave engagement portion formed on the outer periphery of the blocking wall f. It is engaged with the portion h. Note that j is a threaded portion with the outer lid k.

[0006] The lid of the container thus formed is attached to the container l, the outer lid k is removed at the time of opening, and then the knob g is gripped and pulled upward to engage with the engaging portion h. The engagement with the portion i is released, and the opening member e is removed and opened. Then, the contents of the container 1 are poured out and used.

Since the opening of the lid only needs to be released from the engaging portion i, the opening can be opened more easily than the conventional lid which had to be torn.

[0008]

However, the lid of the above container has the following problems. It is a cylinder member b
When there is a difference in the contraction rate between the opening portion e and the opening member e, the sealing is reduced in the engagement of the engagement portion h and the engagement portion i.

In general, the difference in the shrinkage of synthetic resins is caused not only by different types of synthetic resins but also by the difference in molecular weight of the same type of resin. In the case of the above-mentioned container, the opening member e made of polyethylene has a higher shrinkage ratio than the injection tube member b made of polyethylene terephthalate. Although there are only a few places where they engage, gaps are created and the seal is compromised.

The present invention has been made in order to solve the above-mentioned problem. The purpose of the present invention is that there is a difference in the shrinkage ratio between the two members b and e, and the opening member e is larger than the injection cylinder member b. An object of the present invention is to provide a container lid in which the sealing between the members b and e is not impaired when the shrinkage is large.

[0011]

In order to achieve the above object, the present invention will be described. It is made of a synthetic resin, and is composed of a cylinder 2 which is provided integrally with a mounting portion 1 which is attached to a container; A locking portion 4 in the radial direction formed on the inner side of the cylinder 2; the cylinder member 3 provided on the inner side of the cylinder 2
An opening member 7 made of a synthetic resin having a higher molding shrinkage ratio and having a knob 5 and comprising a blocking wall 6 for blocking the passage of the contents of the container; formed in the opening member 7;
, And a locking portion 8 that is locked from the outside in the radial direction.

[0012]

The lid of the container of the present invention is constructed as described above,
When shrinkage occurs, and when there is a difference in shrinkage between the injection tube member 3 and the opening member 7 and the opening member 7 has a larger shrinkage ratio, the opening member 7 has a radius Shrinks toward the center.

Then, the engaging portion 7 of the opening member 7 also contracts in the same center direction. In this case, the engaging portion 4 of the injection tube member 3 also contracts in the radial center direction. 8
Is larger in the contraction rate of
Is further strengthened, and the pressure contact is further strengthened, so that a decrease in sealing performance can be prevented. Thus, the problem of the container lid filed in the above-mentioned application was solved.

[0014]

In FIG. 1, reference numeral 3 denotes a cylinder member formed of a synthetic resin, for example, polyethylene terephthalate, and has a mounting portion 1 and a cylinder 2 to be attached to a container.
The mounting portion 1 may be formed so as to be mounted on the mouth portion 11 of the bottle as shown in FIG.
2, it may be formed in a flange shape.

In FIGS. 1 and 2, reference numeral 4 denotes an engaging portion which is formed so as to engage with a later-described engaging portion 8 in the radial direction. Reference numeral 13 denotes a downward projection. In the figure, reference numeral 14 denotes a screwing portion with an outer cover (not shown).

Reference numeral 7 denotes an opening member made of a synthetic resin, for example, polyethylene as an example. The opening member 7 includes a blocking wall 6 and a knob 5 provided on an upper portion thereof. The knob 5 is formed in a pull ring shape as an example. Reference numeral 8 denotes a locking portion, which is formed so as to lock with the locking portion 4 in a radial direction, and 15 denotes an upward projection.

Although the injection tube member 3 and the opening member 7 are made of different synthetic resins as an example, they may be made of the same kind of synthetic resin. This is because the same type of synthetic resin may cause a difference in shrinkage depending on the molecular weight and other molding conditions.

Reference numeral 16 denotes a narrow width portion, and 17 denotes a width portion. Next, FIG. 4 shows another embodiment of the present invention, in which the locking portion 4 is formed upward, the locking portion 8 is formed downward, and the two 4, 8 are formed in the radial direction. At each other. Such a mode is acceptable. The operation of this embodiment is almost the same as the operation of the present invention described above, and will not be described.

[0019]

According to the present invention, as described above, there is a difference in the contraction rate between the injection pipe member 3 and the opening member 7, and the opening member 7 has a lower contraction rate than the injection pipe member 3. Are large, the two 3 and 7 are hung in the radial direction at the locking portion 4 and the hooking portion 8 even if they shrink, so that the pressure contact at those portions is strengthened and the sealing performance is reduced. Can be prevented.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a cross-sectional view of a lid portion of a container.

FIG. 2 is an enlarged view of a portion of FIG.

FIG. 3 is a view showing an embodiment of the present invention and another embodiment, and showing various examples of a mounting portion of a container lid.

FIG. 4 is a cross-sectional view of a part of a lid of a container, showing still another embodiment of the present invention.

FIG. 5 is a cross-sectional view of the case of using the lid of the container which was invented earlier by the inventor of the present invention and for which a utility model registration application was filed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment part 2 Injection cylinder 3 Injection cylinder member 4 Locking part 5 Knob 6 Blocking wall 7 Opening member 8 Hook part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 47/36 B65D 41/04 B65D 41/32

Claims (1)

(57) [Claims] 1. A cylinder member 3 made of a synthetic resin and composed of a cylinder 2 integrally provided on a mounting portion 1 to be mounted on a container; a locking portion 4 in the radial direction formed inside the cylinder 2; The above injection cylinder 2
, The molding shrinkage rate of the injection cylinder member 3
Made large synthetic resin, it has a knob 5, opening member 7 consisting of the blocking wall 6 for blocking the passage of any items in the container; formed to the opening member 7, or radially outwardly to the locking part 4
The lid of the container, characterized in that it consists of; hook portion 8 which is Luo hooked.