JPH0449089Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to bottle caps for bottles containing various liquid products.

Prior Art The inventor of this invention previously devised and disclosed a lid for a container as shown in Figs. (see official bulletin). Since this invention is an improvement on the lid of the container disclosed above, the disclosed lid will be explained. In the figure, 1 is a lid made of synthetic resin;
For example, it is made of polyethylene and has a plug part 2 and a cylinder part 3. 4 is a protrusion, and 5 is a fissure in the circumferential direction. Further, a weakened line 6 as shown in FIG. 2 is formed between the fissure 5 and the lower end of the cylindrical portion 3, and a knob 7 is formed.
Note that 8 indicates a hole that is part of the weakened line 6, and 9 indicates a tear groove.

Further, in FIG. 6, 10 indicates a recessed portion, and 11 indicates an outer peripheral portion of the upper end.

Next, 12 is a cover, which is made of a synthetic resin having a harder hardness than the lid 1, for example polypropylene, and the outer cylinder 13 has a first inner surface 14 and a second inner surface 15. . 16 is a protrusion. The inner diameter of the second inner surface 15 is formed to be approximately the same as the outer diameter of the cylindrical portion 3, and the inner diameter of the first inner surface 14 is formed to be slightly smaller than the upper end outer peripheral portion 11 of the lid body 1. If this lid is fitted to a bottle mouth (not shown), the user such as a consumer,
In Fig. 2, pinch the knob 7 and press the arrow A7.
direction, the weakened line 6 is torn, the fissure groove 5 is then torn, the tube part 3 is torn off, and the remaining lid is used as usual. At this time, most of the protrusion 4 is removed, and only a small portion remains to be used for pressure welding. Next, the cover 12
When fitting the cover body 1 to the lid body 1, it is done as shown in FIG.

In the figure, 17 is a jig, 18 is a fitting jig, and the inner surface 19 thereof has a taper that becomes smaller in diameter toward the tip. Reference numeral 20 denotes a tip portion of the cover 12, which is sharply formed and is configured to be pushed into the cover 12 and set as shown in the figure.

Next, 21 is a press-fitting jig, which consists of a press pin 22 and a cylindrical body 22 slidably fitted onto the press pin 22. The lid 1 is attached to the end 24 of the pressing pin 22. Now, in this state, move the press-fitting jig 21 in the direction of arrow A21, and insert the cover 1 into the fit-in jig 18.
When the lid body 1 is inserted and pushed further, the lid body 1 is compressed by the inner surface 19 of the fitting jig 18 and advances inside the same inner surface 19, and finally the second inner surface 1 of the cover 12 is pressed.
The upper end outer peripheral portion 11 of the lid body 1 is press-fitted into the inside of the lid body 5 . When the jig 17 is removed in this state and the pressing pin 22 is further pushed in the same direction, the cover 12 leaves the fitting jig 18 and the lid body 1 is pushed out from the fitting jig 18, as shown in FIG. The lid of the container is formed.

Problems to be solved by the invention However, it has been found that the container lid formed in this manner has the following problems. That is, when trying to tear the fissure 5 shown in FIG. 6 from the weakened line 6 by pinching the knob 7 shown in FIG. 2 and pulling it in the direction of arrow A7, the fissure 5 is not torn and the The cylindrical portion 3 has a lower end 25 (sixth
It tore from the part where it touches (Fig.). As a result, the main portion of the protrusion 4 remains on the inner surface of the cylindrical portion 3, making it difficult to smoothly fit into and remove from a bottle mouth (not shown), etc. thereafter.

Furthermore, when inserting the fitting jig 18 into the cover, it is extremely difficult to insert the fitting jig 18 into the cover, and work efficiency cannot be improved.

This invention was made in order to solve such a problem, and its purpose is to remove the fissure from the weakened line 6 when the knob 7 is pulled tightly in the lid formed as described above. To provide a bottle lid which can be reliably torn off, a fitting jig 18 can be inserted into the cover 12 very easily, and work efficiency can be improved.

Means for Solving the Problems This invention is described as follows: A lid body made of synthetic resin and having a plug part that presses against the inner surface of the bottle mouth, and a cylindrical part that contacts the outer periphery of the bottle mouth; a circumferential fissure groove; a weakened line formed by connecting the lower end of the cylindrical portion and the fissure groove; a knob formed in contact with the weakened line; a pressure-fitted part on the top of the lid body; a cover made of synthetic resin; a lower end of the outer cylinder of the cover extending below the fissure; a cross-sectional area formed between the inner surface of the lower end of the outer cylinder and the outer surface of the cylinder, the cross-sectional area becoming smaller toward the upper side; This is a bottle cap characterized by a space with an almost acute-angled cross section.

Function When removing the bottle lid from the bottle mouth (not shown), pinch the knob and tear the weakened line.The weakened line will tear upward and eventually reach the lower end of the cover. The inner surface of the part and
A substantially acute-angled space whose cross-sectional area becomes smaller toward the top is formed between the outer surfaces of the cylindrical portions. The cylindrical part to be torn off is bent by the lower end of the cover, but because of the space, it is not bent at a steep angle but at an almost obtuse angle, and stress concentration is less likely to occur in this part. The weakened line of the lid body on the inside of the cover continues to tear without being torn, and finally reaches the fissure, and then the fissure is torn.

Embodiment As shown in Figures 1 to 3, the structure of this invention, as compared to the previously disclosed invention, resulted in no changes being made to the lid body, and only the cover was partially improved. Therefore, the drawing numerals, names of parts, etc. in each drawing of this invention are the same as those of the lid disclosed above, except for improvements. Therefore, the explanation of the same reference numerals will be omitted since it will be redundant.

Note that the materials of the lid and the cover are completely the same as those of the disclosed lid, and as shown in FIG. 8, the method for press-fitting the lid into the cover is also completely the same, so a description thereof will be omitted.

Next, as shown in FIGS. 3 and 4, the cover 12
A space 26 is formed between the lower end 25 of the outer cylinder 13 and the outer surface of the cylinder part 3 of the lid 1, the cross-sectional area of which becomes smaller toward the top. In the figure, the inner side of the lower end portion 25 is formed in an arc shape, but it may be formed in a straight line shape, and the space 26 having a substantially acute-angled cross section includes both of these. It may also be chamfered.

The operation of this embodiment is almost the same as the operation of this invention described above, so it will be omitted. However, when the cylindrical portion 3 of the disclosed lid shown in FIG.
The bottom end of the bottle is bent at one point in its cross section, and as a result, stress concentration occurs at that point, causing it to be torn off. without cutting at the lower end 25 of the outer cylinder 13, and from the weakened line 6 to the fissure 5.
It will be understood that it is possible to reliably tear the fissure 5 by reaching .

Effects of the invention This invention is constructed as described above, and a space is formed between the inner surface of the lower end of the outer cylinder of the cover and the outer surface of the cylindrical part of the lid body, the cross-sectional area of which becomes smaller toward the top, with an almost acute-angled cross-section. Accordingly, the cylindrical portion can be reliably torn from the fissure.

Furthermore, the fitting jig can be inserted very easily into the cover.

[Brief explanation of the drawing]

Figures 1 to 4 show examples of this invention; Figure 1 is a half-sectional view of the cover of the bottle lid, Figure 2 is a front view of the lid of the bottle lid, and Figure 3 is a cross-section of the bottle lid. Fig. 4 is an enlarged partial view of the part shown in Fig. 3, Figs. FIG. 6 is a sectional view of the lid of the container, FIG. 7 is a half sectional view of the cover of the lid, and FIG. 8 is an explanatory diagram of the case where the lid body is press-fitted into the cover. 1...Lid body, 2...Plug part, 3...Cylinder part, 5...
fissure, 6... line of weakness, 7... knob, 12...
...Cover, 25...Lower end, 26...Space.

Claims (1)

[Scope of utility model registration request] A lid made of synthetic resin and requiring a stopper that presses against the inner surface of the bottle mouth, and a cylindrical part that contacts the outer periphery of the bottle mouth; a circumferential groove formed in the cylindrical part; a lower end of the cylindrical part and the A weakened line formed by connecting the grooves; a knob formed in contact with the weakened line; a cover made of synthetic resin that is press-fitted to the upper part of the lid; extends below the fissure. A lower end of the outer cylinder of the cover; a space formed between the inner surface of the lower end of the outer cylinder and the outer surface of the cylinder, the cross-sectional area of which becomes smaller toward the top, and which has a substantially acute-angled cross section.