JPS5849952Y2 - Structure of mounting part of lid with opening tab - Google Patents

Description

[Detailed description of the invention] This invention relates to the mounting structure of a lid with an opening tab, and in particular, it is an improvement for improving the opening property using the tab in a structure in which such a lid is installed in close contact with a sealing member. Regarding.

FIG. 1 is a longitudinal cross-sectional view showing an example of a lid with an opening tab applied to this invention, and FIG. 2 is a plan view of the same.
FIG. 3 is also a bottom view.

The lid 1 with an opening tab shown here is used, for example, to keep the exposed surface of a rubber stopper that closes the mouth of an infusion bottle in a sterile state.

That is, the lid 1 is attached to cover the rubber stopper.

The lid 1 includes an end surface 2 and a cylindrical portion 3 extending downward from the periphery of the end surface 2 perpendicularly to the curved surface 2.

A rib 4 is formed around the end surface 2.

As shown in FIG. 3, an outer circumferential score 5 and a half circumferential score 6 are formed on the end surface 2.

The opening tab 7 is attached to the upper surface, that is, the front side, of the end surface 19 and to the portion surrounded by the outer peripheral score 5.

The opening tab 7 is attached using a rivet formed by punching out a part of the end surface 2, forming it into a protrusion shape, inserting it into a hole formed at the base of the tab 7, and then crushing the protruding part. This is accomplished by 8.

This rivet 8, which is the base of the opening tab 7, is located inside and close to the outer circumference score 5, and the half-circumference score 6 is located on the opposite side of the outer circumference score 5 via the rivet 8, which is the base of the tab 7. It is formed.

FIG. 4 is a longitudinal cross-sectional view showing a conventional example of the structure of a mounting part in which the lid 1 of FIG. 1 is used.

Referring to FIG. 4, for example, the bottle opening 9 has a flange 10.
As a result, a step portion 11 facing downward is formed.

The bottle mouth 9 is closed by a rubber stopper 12 as a sealing member.

When it is necessary to maintain the exposed surface of the rubber stopper 12 in a sterile state, the lid 1 is put on and the lower edge of the cylindrical portion 3 of the lid 1 is deformed so as to rest on the stepped portion 11. By doing so, the lid 1 is attached to cover the rubber stopper 12.

As mentioned above, when the lid 1 is used to maintain sterilization, the state of close contact between the back side of the lid 1 and the rubber stopper 12 is as follows.
Higher is preferable.

For example, in FIG. 4, the end surface 2 of the lid 1 is deformed along the upper end surface 13 of the rubber stopper 12, and a close contact state is obtained to the extent that it bulges upward.

However, it has been found that this causes problems.

FIGS. 5 and 6 are diagrams for explaining such problems.

Here, FIGS. 5 and 6 are enlarged cross-sectional views showing the deformed state near the base of the tab 7 caused by raising the tab 7. FIG. 5 is an ideal state, and FIG. 6 is a state that should be solved. Each state indicates a problem.

The part surrounded by the outer circumference score 5 of the lid 1 is a tab 7 in the so-called easy-open method often seen on beer cans, etc.
It can be easily opened by pulling up.

At this time, ideally, as shown in FIG. 5, by putting your finger on the opening tab 7 and raising this tab 7, the half circumference score 6 is set around the rivet 8, which is the base of the tab 7, as a fulcrum.
As the side is lifted upward, the half-circumference score 6 is cut, and almost at the same time, the side of the outer circumference score 5 is pushed downward and a part of the outer circumference score 5 is cut.

Then, by pulling up the opening tab 7 as it is, the cutting range of the outer circumference score 5 is expanded, and finally all of the outer circumference score 5 is cut, the area surrounded by the outer circumference score 5 is removed, and the outer circumference score 5 is cut. A defined opening is formed.

Here, a contour 14 as shown by an imaginary line in FIG.
It should be noted that a space of 100 mm is required on the back side of the lid 1 in order to ideally proceed with the aperture forming operation as described above.

In contrast, in FIG. 6, the space represented by the contour 14 shown in FIG. 5 cannot exist at all.

That is, FIG. 6 shows a state in which the lid 1 is in close contact with the upper end surface of the rubber stopper 12 as shown in FIG. 4.

Assume that in the embodiment shown in FIG. 6, the same operation as described above is performed on the opening tab 7.

However, the result will be different from the previous case.

That is, when an attempt is made to raise the opening tab 7 by placing a finger on the opening tab 7, the half circumference score 6 may be barely cut.

However, the rubber stopper 12 prevents the outer circumferential score 5 side of the rivet 8 from being pushed downward, and cutting even a portion of the outer circumferential score 5 is not realized in this state.

If the outer circumference score 5 is mechanically relatively weak when the opening tab 7 is pulled up as it is, the outer circumference score 5 may be
may be cut, and an opening may be formed in the portion surrounded by the outer circumferential score 5 without any problem.

However, in many cases, as the tab 7 is pulled up, the fulcrum shifts from the rivet 8 to the outer score 5 side, the rivet 8 is undesirably deformed, and the rivet 8 becomes unable to hold the tab 7. 7 often comes off without cutting the outer circumferential score 5.

Further, it often happens that the cutting of the half-circumference score 6 progresses more than desired until it reaches the outer circumference score 5.

At this time as well, the tab 7 comes off without cutting all of the outer circumferential score 5, along with a part of the lid 1 in the area surrounded by a part of the outer circumferential score 5 and the half circumferential score 6.

In such a case, there is no point in providing the opening tab 7 and adopting the so-called easy open method, and the operator has to troubleshoot by hooking an appropriate tool onto the crushed rivet 8 to set the outer circumference score 5. This means that the amputation will have to be carried out.

Therefore, the main purpose of this invention is to provide a structure for mounting a lid with an opening tab that can solve the above-mentioned problems.

In summary, by making the part surrounded by the outline 14 shown in FIG. It was designed so that

Other objects and features of the invention will become clearer from the detailed description given below with reference to the drawings.

FIG. 7 is a longitudinal sectional view of a rubber stopper as a sealing member applied to this invention, and FIG. 8 is a plan view thereof.

As shown in these drawings, the upper end surface 1 of the rubber stopper 15
6, an annular recess 17 is formed.

The radial position of the recess 17 is chosen to correspond to the position of the contour 14 shown in FIG.

FIG. 9 shows the structure of the attachment part of the lid 1 of FIG. 1 to the rubber stopper 15 of FIG. 7, and represents one embodiment of this invention.

Note that FIG. 9 is a diagram corresponding to FIG. 4, and parts corresponding to those shown in FIG. 4 are given the same reference numerals, and overlapping explanations will be omitted.

As clearly shown in FIG. 9, on the upper end surface 13 of the rubber stopper 15 facing the part from the rivet 8, which is the base of the opening tab 7, to the outer peripheral score (not shown in FIG. 9), This means that the recess 17 has been formed.

This recess 17 provides a space surrounded by the outline 14 shown in FIG. 5, and enables an ideal opening forming operation as shown in FIG. 5 to be performed.

In the above-described embodiment, the lid 1 has a circular planar shape, and the recess 17 is formed to extend in an annular shape.

Therefore, no matter what positional relationship the lid 1 is attached to without paying attention to misalignment in the rotational direction between the lid 1 and the rubber stopper 15, the recess 17 will be present at a predetermined position.

If such an advantage is not desired, the recess 17 need not be formed to extend in an annular shape, but may be provided at a specific location with a desired size.

In addition, if the planar shape of the lid is non-circular, the rubber stopper 1
5 is also a similar non-circular shape, and since both are naturally positioned in the rotational direction, it can be said that the recessed portion does not necessarily have to be formed to extend in an annular shape.

In this case, the number of recesses may be one, or a plurality of recesses may be provided in consideration of the possible fitting direction of the lid to the rubber stopper.

Furthermore, this invention is not limited to lids attached to bottle mouths.

Therefore, there is no need to limit the sealing member to a rubber plug.

In other words, if the lid is attached in close contact with the sealing member on the back side of the area surrounded by the outer circumferential score and includes the area surrounded by the outer circumferential score, then This idea can also be applied to the structure of the mounting part.

Further, the close contact between the lid and the sealing member does not necessarily have to be direct contact, but may be through a suitable packing.

In this case, the structure of the packing itself must be such that it does not impair the function of the recess provided in the sealing member.

Therefore, the shape of the packing is generally selected so that it does not cover the recess, but if the packing is easily deformed mechanically, it may be formed over the entire area between the lid and the sealing member. good.

As described above, according to this invention, a recess is formed on the sealing member side that allows the outer circumferential side of the base of the opening tab to be pushed downward and a part of the outer circumferential score is cut, so it is always ideal. A typical aperture forming operation can be achieved.

Therefore, there is no problem such as the opening tab coming off during the opening operation.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an example of a lid with an opening tab applied to this invention, and FIG. 2 is a plan view of the same.
FIG. 3 is also a bottom view. FIG. 4 is a longitudinal cross-sectional view showing a conventional example of a mounting part structure in which the lid shown in FIG. 1 is used. 5 and 6 are enlarged cross-sectional views showing the deformed state near the base of the tab caused by the tab being raised;
The figure shows an ideal state, and FIG. 6 shows a state including a problem to be solved. FIG. 7 is a longitudinal sectional view of a rubber stopper as a sealing member applied to this invention, and FIG. 8 is a plan view thereof. FIG. 9 shows the structure of the attachment part of the lid of FIG. 1 to the rubber stopper of FIG. 7. In the figure, 1 is a lid, 5 is an outer circumference score, 6 is a half circumference score, 7 is an opening tab, 8 is a rivet as a base, 15 is a rubber stopper as a sealing member, and 17 is a recess.

Claims (2)

[Scope of utility model registration request] (1) The part to be opened is surrounded by a peripheral score, an opening tab is attached to the front side of the part surrounded by the peripheral score, and the base of this tab is located inside the peripheral score and close to it. , A half-circumference score is formed on the opposite side of the outer circumference score through the base of the tab, extending around a part of the circumference of the tab base, and by raising the tab by placing a finger on the tip of the tab, the half-circumference score is created using the base as a fulcrum. As the side is lifted upwards, the half circumference score is cut, and as the side of the circumference score is pushed downward, a part of the circumference score is cut off.By pulling up the tab, all the circumference scores are cut and the opening is placed in the selected area. a lid with an opening tab that is attached to the sealing member in a region that is on the back side of the portion surrounded by the outer peripheral score and includes the portion surrounded by the outer peripheral score; In the attachment part structure, a recessed portion is formed in a portion of the sealing member facing a portion extending from the root to the outer circumferential score so as not to prevent the outer circumferential score side from being pushed downward. , lid attachment structure with opening tab. (2) The structure according to claim (1), wherein the lid has a circular planar shape, and the recess extends in an annular shape.