JPH0748526Y2 - Bottle cap - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cap for sealing the mouth of a plastic bottle filled with milk or the like.

2. Description of the Related Art As a cap of this type, as shown in FIG. 6, a cap main body 51 that covers the rim of a bottle and a traverse thin portion 53 are integrally formed on the lower end of a body wall 52 of the cap main body 51. The skirt 54 for preventing the cap from coming off is provided on the skirt 54, and the skirt 54 has a horizontal base end of a required length continuous to the lower end of the skirt 54 and one of the base ends of the knob 55. It is known that a skirt vertical cutting thin portion 56 reaching the upper end of the skirt 54 is formed.

Further, as another cap shown in FIG. 7, like the cap described above, a cap body 61 and a skirt 64 provided at the lower end of the cap body 61 via a thin portion 63 for crossing are provided. Two slits 65, 66 extending upward from the lower end to the middle of the skirt and a thin portion 67 for skirt vertical cutting extending upward from the upper end of one slit 65 to the upper end of the skirt 64 are formed. It is known that

Problems to be Solved by the Invention In the two types of caps shown in FIGS. 6 and 7, the skirts 54 and 64 prevent the cap from being accidentally dropped from the bottle. For the cap, the knob 55, and for the cap in FIG. 7, both slits 65, 66.
Between the cap body 51, 61 by separating the skirts 54, 64 from the cap bodies 51, 61 by pulling the cross-section thin parts 53, 63 for crossing and the thin parts 56, 67 for longitudinal skirt cutting.
Although it is possible to easily open and reseal and reseal the bottle mouth with only 1,61, there are the following problems. That is, in the cap of FIG. 6, the knob 55 may interfere with the chucking ribs 57 of the bottle and may be pushed outward, so that when the cap is put on the bottle and then the bottles are aligned. If the knob 55 gets in the way and some kind of impact acts on the knob 55, the thin portion 56
May be cut inadvertently. The cap shown in FIG. 7 does not have the above problem, but has a problem that it is difficult to pinch the space between the slits 65 and 66 and the opening operation cannot be performed easily.

Furthermore, although there is a problem common to both caps above, when cutting the thin wall portions 53, 63 for crossing, the pulling force acts diagonally on both thin wall portions 53, 63, so it is necessary to create a starting point for cutting. You have to pull with great force.

An object of the present invention is to provide a bottle cap that solves the above problems.

Means for Solving the Problems A bottle cap according to the present invention comprises a cap body that covers the rim of the bottle, a flange that connects to the lower end of the body wall of the cap body, and a rim of the bottle that connects to the tip of the flange. A cap slip-off prevention skirt having an inward annular engaging protrusion engaged with an outward annular protrusion formed on the outer surface of the cap at the lower end, and a thin portion for cap crossing at the boundary between the flange and the skirt. In a bottle cap provided with a skirt, a knob is provided so as to be connected to a part of the upper end of the skirt so as to project upward from the flange. A thin part for use is formed,
It is characterized in that a thin portion for cutting a skirt reaching the middle of the skirt height of the other end of the knob is formed.

Function In the bottle cap according to the present invention, since the knob is provided so as to be connected to a part of the upper end of the skirt so as to project above the flange, the knob interferes with something such as a chucking rib of the bottle. It is not pushed outwards, and the knob is easily pinched.

Further, a thin portion for skirt vertical cutting is formed which reaches the lower end of the skirt from one end of the knob, and a thin portion for skirt cutting which reaches the middle of the skirt height from the other end of the knob. Therefore, the pulling force of the knob acts in parallel with the thin-wall portion for cutting and the thin-wall portion for cutting of the skirt.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

The bottle is integrally molded of polyethylene as a whole, and as shown in FIGS. 1 and 3, has a cylindrical barrel 11 and a frustoconical shoulder 12 connected to the upper end of the barrel 11. ,shoulder
It has a cylindrical mouth portion 13 connected to the upper end of 12. Mouth 13
Is composed of an upper small diameter portion 14, a taper portion 15, an upper large diameter portion 16, a lower small diameter portion 17 and a lower large diameter portion 18, which are sequentially connected from the top to the bottom. A projecting edge 21 is provided at the upper end of the upper small-diameter portion 14 so as to be obliquely upward inward. An annular fitting protrusion 22 is provided in the middle of the outer surface of the upper small diameter portion 14. An outward annular engagement protrusion 23 is provided on the upper end of the outer surface of the upper large diameter portion 16. A chucking rib 24 is provided at the boundary between the upper large diameter portion 16 and the lower small diameter portion 17.

Similar to the bottle, the cap is integrally formed of polyethylene as a whole, and has a cap body 31 that covers the upper small diameter portion 14. Cap body
The reference numeral 31 includes a top wall 32 and a body wall 33. On the lower surface of the top wall 32, there is provided an annular plug 34 having a V-shaped cross section which is fitted almost perfectly into the protruding edge 21 of the upper small diameter portion 14. As shown in detail in FIG. 4, the outer surface base of the plug 34 is provided with an upper annular fitting groove 38 into which the tip of the protruding edge 21 is fitted. A lower annular fitting groove 39 in which the fitting projection 22 is fitted is provided in the middle of the inner surface of the body wall 33. An outward flange 35 is provided at the lower end of the body wall 33, and a skirt is provided at the tip of this.
36 are provided integrally. An inward annular engaging protrusion 37 engaged with the outward annular engaging protrusion 23 is provided near the lower end of the inner surface of the skirt 36.

At the boundary between the flange 35 and the skirt 36 of the cap body 31, an annular thin portion 41 for crossing is provided by forming a V groove 42 on the inner surface side. A rectangular knob 43 is provided so as to be adjacent to a part of the cross-sectional annular thin portion 41 and to extend a part of the skirt 36 upward. A cut 44 having a length substantially equal to the width of the knob 43 is provided in a portion of the transverse thin annular portion 41 just inside the knob 43. The length of the cut 44 may be greater than or equal to the width of the knob 43. The skirt 36 has a tab as shown in FIGS.
The thin part 45 for vertical skirt reaching the lower end of one skirt 36 of the base end of 43 is the skirt 36 of the other end.
A thin portion 46 for cutting a skirt reaching the middle of the height is provided by forming U grooves 47 and 48 on the outer surface of the skirt 36, respectively.

Next, the unsealing operation will be described with reference to FIG. 5. First, when the knob 43 is pulled outward (FIG. 5a),
The cut 44 is the starting point, and the thin part 45 for vertical skirt cutting
And the cutting starts from the upper end of the skirt cutting thin-walled portion 46, and the cutting proceeds downward along both thin-walled portions 45, 46. At this time, the pulling force of the knob 43 is
Since it acts parallel to 6, its tensile force may be small. When the cutting of both thin-walled portions 45 and 46 progresses to the lower end level of the thin-walled portion 46 for cutting the skirt 36, the thin-walled portion 46 for cutting the skirt does not proceed any further, but the thin-walled portion 45 for vertical skirt cutting The cutting is continued with the momentum of the cutting so far, and the cutting proceeds at a stretch to the lower end of the thin portion 45 for vertical skirt cutting (Fig. 5b). Around this, cutting of the thin portion 41 for crossing also starts, but since the cutting is completed as described above, the thin portion 41 for crossing is also cut with the momentum of the above cutting (fifth). Figure c). Then, when the thin portion 41 for crossing is cut over the entire length (Fig. 5d), the skirt 36 is separated from the cap main body 31 and the cap main body 31 is removed from the bottle to open the mouth of the bottle, If the cap body 31 is attached, its mouth is resealed.

Effect of the Invention According to the present invention, since the knob does not interfere with something such as a chucking rib of a bottle and is pushed out outward, when the bottle is capped or the bottles are subsequently aligned. The knob does not get in the way, the impact does not act on the knob, and the thin portion is not accidentally cut.

Further, since the knob is easily pinched, the opening operation can be easily performed.

Also, since the pulling force of the knob acts in parallel with the thin section for cutting and the thin section for cutting of the skirt, it is possible to cut the thin section for cutting and the thin section for cutting with a slight force. Since the thin portion is also cut, the skirt can be completely separated from the cap.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention, FIG. 1 is a perspective view including a crushed section, FIG. 2 is a plan view, and FIG. 3 is a vertical section taken along line III-III of FIG. FIG. 4 is an enlarged sectional view showing a part of FIG. 3, and FIG. 5 is an explanatory view showing an opening procedure. 6 and 7 are perspective views showing a conventional example. 23 ... Outward engaging protrusion, 31 ... Cap, 33 ... Cap body wall, 36 ... Skirt, 37 ... Inward engaging protrusion,
41 ...... Cross-thin section, 43 ...... Knob, 44 ...... Break, 45
...... Thin section for vertical cutting, 46 …… Thin section for cutting.

Continued Front Page (72) Kozo Kokubo Taro Kitajima-cho, Itano-gun, Tokushima Prefecture 1 Susukino Kakoki Co., Ltd. at 10 Nishinokawa (72) Inventor Masaharu Kanai Taro-Hachisu, Kitajima-cho, Itano-gun, Tokushima Prefecture 1 at 10 Nishinokawa, Shikoku Kakoki Co., Ltd. (56) References

Claims (1)

[Scope of utility model registration request] 1. A cap main body 31 covering the rim of the bottle, a flange 35 connected to the lower end of the body wall 33 of the cap main body 31, and a flange 35 connected to the tip of the flange 35 and formed on the outer surface of the rim of the bottle. A cap skirt 36 having an inward annular engaging protrusion 37 engaged with the outward annular protruding portion 23 at its lower end, the flange 35 and the skirt.
In the bottle cap in which the thin portion 41 for crossing the cap is provided at the boundary of 36, a knob 43 is provided so as to be continuous with a part of the upper end of the skirt 36 and project above the flange 35.
A thin portion 45 for cutting the skirt that reaches the lower end of the skirt 36 from one of the base ends of the skirt is formed, and a thin portion for cutting the skirt that reaches the middle of the height of the skirt 36 from the other end of the knob 43. A bottle cap, characterized in that a part 46 is formed.