JP4152717B2 - plug - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stopper made of resin and provided with a pull handle.
[0002]
[Prior art]
For a stopper made of resin and provided with a pulling handle, the annular handle portion and a disc portion concentrically located inside the annular handle portion are partially connected so as to be partially broken, and the annular handle A plug that pulls up and opens the part is disclosed (for example, see Patent Document 1).
[0003]
However, in this conventional stopper, when the annular handle is lifted and opened, the stopper is lifted with the cylindrical fitting wall part that fits into the bottle opening being in close contact with the inner wall of the bottle opening. Therefore, there may be a phenomenon that the pulling resistance is large and it is difficult to remove the stopper. Furthermore, there was a problem that the root of the annular handle portion was easily broken by repeated use.
[0004]
In addition, the resin stopper has a problem that the stopper is lifted after the stopper is plugged immediately after being bottled or after being stoppered again after opening.
[0005]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-206397 (page 3-4, FIG. 2)
[0006]
[Problems to be solved by the invention]
In view of these problems, the present invention has a problem that the stopper is pulled up with the fitting wall closely attached to the inner wall of the bottle mouth and the stopper is difficult to pull out, and the root of the annular handle is broken by repeated use. The company intends to provide a plastic plug that eliminates the trouble of being easy to handle and the problem of the plug floating after being plugged.
[0008]
[Means for Solving the Problems]
The gist of the present invention is that the disc portion includes a cylindrical barrel portion having a fitting wall that fits into the inner wall of the bin mouth, and a disc portion that is crowned on the upper portion of the barrel portion. An annular handle portion concentrically located outside, a connecting portion connecting a part of the outer peripheral edge of the disk portion and a part of the inner peripheral edge of the annular handle portion, the disk portion and the annular handle portion, A breakable connecting portion for connecting the connecting portion to the breakable portion, and a base portion that is a portion extending in the circumferential direction from the connecting portion. The plug is composed of an arcuate part excluding the connecting part and the root part, and the radial thickness of the root part is 90% or less of the radial thickness of the arcuate part in the circumferential direction. It is in.
[0009]
A central angle for viewing the connecting part from the center of the disk part may be 10 to 120 degrees.
[0011]
Still further, the gist of the present invention is the stopper, which is applied to a 1.8 liter bottle, and is most tight in a state where the fitting of the fitting wall with the inner wall of the bottle mouth is plugged. wall thickness t w of the portion to be is in it is a plug is 0.4~2mm.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The aspect which concerns on this invention is demonstrated in detail based on drawing. The stopper 2 of the present invention shown in FIG. 1 includes a cylindrical body portion 6 having a fitting wall 4 that fits into an inner wall of a bottle mouth, a disk portion 12 that is crowned on the upper portion of the body portion 6, and a disk portion 12. And an annular handle portion 10 concentrically located outside. A part of the outer peripheral edge 14 of the disk part 12 and a part of the inner peripheral edge 15 of the annular handle part are integrally connected via a connecting part 16. Further, the outer peripheral edge 14 and the inner peripheral edge 15 are integrally connected through a breakable connecting portion 20 so as to be breakable. FIG. 2 is a top view of the stopper 2 shown in FIG. 1, and FIG. 3 is a cross-sectional view in the AA ′ direction of the stopper 2 in a state of being plugged into the bottle opening 42.
[0013]
Slits 28 and 28 a are formed between the disk portion 12 and the annular handle portion 10. The annular handle portion 10 has a radial thickness t and a width w perpendicular to the radial direction. For example, in the aspect of FIG. 1, the thickness t is thin at the root portion (root portion 54) of the connecting portion 16 as described later.
[0014]
When opening the plug, the annular handle portion 10 is picked and pulled upward. At this time, the breakable connecting portion 20 is broken, and the annular handle portion 10 is pulled up while being connected to the disk portion 12 by the connecting portion 16. Along with this, the body 6 is also raised and the stopper 2 is opened.
[0015]
Further, as shown in the top explanatory view of FIG. 4, the plug 2 has a central angle β of about 60 degrees when viewing the connecting portion 16 from the center C of the disk portion 12. As a result, as shown in the schematic front view of FIG. 5, the upper end portion 11 of the annular handle portion 10 is pulled upward at a position close to the virtual extension line B extending upward from the connecting portion 16 at the time of opening. . In this case, the pulling force F1 causes a force to incline the stopper 2 at the same time. By inclining the stopper 2, the close contact state between the body portion 6 and the inner wall of the bottle mouth 42 is partially lost, resulting in smoothness. Opening is performed.
[0016]
On the other hand, when the central angle β of the stopper 2a is about 125 degrees, for example, as shown in the top explanatory view of FIG. 6, as shown in the front schematic view of FIG. However, compared with the case of the aspect of FIG. 5, it will be pulled up in the position which approached the center axis C of the stopper 2 from the virtual extension line B. FIG. When the annular handle portion 10 is pulled up in such a manner as shown in FIG. 7, the force F <b> 1 for pulling up the plug 2 acts almost on the central axis C of the plug 2, and the force for tilting the plug 2 almost acts on the plug 2. Therefore, the central axis direction of the bottle mouth and the central axis direction of the stopper remain parallel, and the inner wall of the bottle mouth and the outer peripheral surface of the barrel portion 6 of the stopper 2 are pulled up to increase the pulling resistance.
[0017]
In the present invention, the central angle β is preferably 10 to 120 degrees. When the central angle β is less than 10 degrees, there is a possibility that the annular handle portion 10 may be broken at a portion connected to the connecting portion 16 when the annular handle portion 10 is pulled up. When the central angle β exceeds 120 degrees, the body 6 is caught on the inner wall of the bottle mouth 42 and the stopper 2 is difficult to open. Or the inner wall of the bottle mouth and the outer peripheral surface of the barrel part 6 of the stopper are pulled up and the pulling resistance increases.
[0018]
On the other hand, as shown in FIG. 2, the annular handle portion 10 is a connecting portion 52 where the connecting portion 16 and the annular handle portion 10 are connected, and a portion extended from the connecting portion 52 in the circumferential direction of the annular handle portion 10. The base portion 54 has a central angle α viewed from the center C of the disk portion 12 of 10 to 90 degrees, and the arc-shaped portion 56 excluding the connecting portion 52 and the root portion 54.
[0019]
The root portion 54 tends to break due to fatigue particularly when the opening and closing are repeated and the operation of pulling up and opening the annular handle portion 10 is repeated. It has been found that this phenomenon is not eliminated even if the radial thickness of the annular handle portion 10 is increased.
[0020]
As a result of intensive studies, it has been found that by making the radial thickness t of the root portion 54 smaller than the radial thickness ta of the arc-shaped portion 56, it is possible to prevent the root portion 54 from being broken at the time of opening. In particular, when the opening and closing are repeated and the operation of pulling up and opening the annular handle portion 10 is repeated, the root portion 54 can be prevented from breaking due to fatigue.
[0021]
For this purpose, the radial thickness t of the root portion 54 is preferably 90% or less of the radial thickness ta of the arc-shaped portion 56. The thickness t is a value that exceeds the thickness determined so that the stress applied to the cross section of the root portion 54 at the time of opening is equal to the breaking strength of the material resin forming the root portion 54.
[0022]
Further, the stopper 2 of the present invention is fitted to the inner wall of the bottle mouth of the fitting wall 4 (FIG. 3) that fits the inner wall of the bottle mouth 42, particularly when the bottle is a standard 1.8 liter bottle. When the thickness tw of the portion that is most tightly struck with 0.4 is 2 to 2 mm, it is possible to prevent floating from the bottle opening 42 after the plugging. The fitting wall 4 is a peripheral wall of the barrel portion 6 of the stopper that is plugged, and is a peripheral wall of a portion where the outer peripheral surface of the peripheral wall is in contact with the inner peripheral surface of the bottle port 42. If the thickness tw is less than 0.4 mm, the fitting force between the fitting wall 4 and the bottle opening 42 may be unfavorable. Moreover, the fitting wall 4 may be wrinkled by the stopper and the sealing performance may be impaired. If the thickness tw exceeds 2 mm, the rigidity of the fitting wall 4 becomes excessive, and even if the plug is pushed in for plugging, the fitting wall that has been deformed by pushing will return to its original shape due to the repulsive force that lifts the plug. May occur.
[0023]
Normally, the body portion 6 has the thickest portion 64 from the base of the upper end to the portion lowered by about 2 to 5 mm through the upper end 62 of the fitting wall 4, and this portion 64 is fitted with the inner wall of the bin mouth. This is the most tight part when Ai is plugged. The degree of tightness of the fit is represented by a difference d2-d1 between the inner diameter d1 of a predetermined portion of the bin mouth and the outer diameter d2 of the fitting wall 4 fitted to the predetermined portion.
[0024]
Including the case where the bottle is not a standard 1.8 liter bottle, depending on the inner diameter of the bottle mouth, the thickness tw ( By setting the value of mm) within the optimum range, it is possible to prevent the stopper from floating from the bottle opening after the stopper while maintaining an appropriate fitting force. The optimum range is 0.09 · √ when the outer diameter of the fitting wall is R (mm) at the site where the fitting between the fitting wall and the inner wall of the bottle mouth is the tightest. R ≦ tw ≦ 0.45 · √R.
[0025]
Further, this lifting does not occur relatively when the uppermost inner wall surface 70 of the bin mouth 42 is linear in the vertical direction as shown in FIG. 8 (a), but as shown in FIG. 8 (b). This is likely to occur when the uppermost inner wall surface 70 of the mouth 42 is bent outward as viewed in the vertical direction, and the uppermost inner wall surface 70 opens upward. The plug 2 of the present invention is preferable because it can exhibit the effect of preventing lifting even when it is used for such a bottle opening that is open to the front.
[0026]
The plug 2 of the present invention is preferably made of a material that can be elastically deformed moderately to an external force. For example, it is preferably made of a synthetic resin. The plug 2 of the present invention can be manufactured by molding a resin, for example, by injection molding. Examples of the material resin include a polyethylene resin, a polypropylene resin, a vinyl chloride resin, a polyester resin, a polyamide resin, and a polystyrene resin.
[0027]
In addition, in this specification, the same code | symbol written over each figure shows the same or similar member and thing.
[0028]
Although the embodiment of the stopper of the present invention has been described above, the present invention can be implemented in variously modified, modified, and modified embodiments based on the knowledge of those skilled in the art without departing from the spirit thereof. All the embodiments belong to the scope of the present invention.
[0029]
For example, as shown in the plug 2b of FIG. 9, even if the fitting wall 4a is composed of a large diameter portion 13 having a slightly larger outer diameter at the upper base and a large small diameter portion 17 having a slightly smaller outer diameter at the lower end portion. Good. In this case, the large-diameter portion 13 is strongly fitted to the inner wall of the bin mouth, and is tightly fitted. Further, the narrow diameter portion 17 is weakly fitted to the inner wall of the bottle mouth, and is loosely fitted.
[0030]
Further, for example, a chamfered portion 21 may be formed in the circumferential direction on the outer peripheral edge of the lower end of the fitting wall 4a so that the insertion into the bin mouth becomes easy. Further, one or a plurality of grooves 23 may be formed in the longitudinal direction on the outer peripheral surface of the small-diameter portion 17 at a predetermined interval. The groove 23 forms a passage through which the gas leaks to the outside when the stopper 2b is pushed up by the pressure of the gas generated from the contents of the bottle after the stopper. For this reason, the groove | channel 23 has a function which prevents that the plug 2b blows off with the pressure of gas.
[0031]
Still further, the outer wall surface of the barrel portion (fitting wall) of the plug may include a portion that is gradually tapered from the upper side to the lower side in the shape of a conical circumferential surface.
[0032]
Further, as in the stopper 2c shown in FIG. 10, the disk portion 12c may be provided with a step around the periphery so as to create a gap 50 between the upper end of the bottle opening 42 when the stopper is plugged. Good. The step is provided between the contact portion 52 between the disc portion 12c and the upper end of the bin port 42 and the outer peripheral edge of the disc portion 12c. As a result, a hooking portion that engages with the lower edge of the bottle opener crown is inserted into the gap 50, and a normal bottle opener operation using the bottle opener becomes possible. In this case, if the hooking portion is inserted into the gap 50 directly below the connecting portion 16 and the unplugging operation is performed, the breakable connecting portion 20 is broken by the force applied to the annular handle portion 10 and the opening force is released. The operation is done without saying that. Furthermore, since the stopper 2c easily hangs the tip of the finger on the lower surface of the annular handle portion 10, the operation of pulling up the annular handle portion 10 is easy.
[0033]
【The invention's effect】
The stopper of the present invention can solve the trouble that the fitting wall is in close contact with the inner wall of the bottle mouth and the stopper is difficult to pull out.
[0034]
The stopper of the present invention can solve the trouble that the base of the annular handle portion is easily broken by repeated use.
[0035]
The stopper of the present invention can solve the problem that the stopper is lifted after being plugged.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an essential part showing the shape of a stopper according to the present invention.
FIG. 2 is a top view of the stopper shown in FIG.
3 is a cross-sectional view in the AA ′ direction of the stopper shown in FIG. 2 in a state where the stopper is plugged into a bottle opening. FIG.
FIG. 4 is a top view of the stopper of the present invention.
FIG. 5 is a schematic side view of the stopper shown in FIG. 4 in a state where the annular handle portion is pulled up.
FIG. 6 is a top view of the stopper when the central angle β is about 125 degrees.
7 is a schematic side view of the stopper shown in FIG. 6 in a state where the annular handle portion is pulled up. FIG.
8 shows a cross-sectional shape of a bottle mouth into which the stopper of the present invention is plugged, and FIG. 8 (a) is a schematic view when the inner wall surface at the top of the bottle mouth is linear in the vertical direction, FIG. (B) is a schematic diagram of the state in which the inner wall surface at the top of the bin mouth is bent outward as viewed in the vertical direction.
FIG. 9 is a schematic perspective view of an essential part showing an example of the shape of a stopper according to another embodiment of the present invention.
FIG. 10 is a cross-sectional view showing an example of the shape of a stopper according to still another aspect of the present invention.
[Explanation of symbols]
2: plug of the present invention 4: fitting wall 6: body 10: annular handle portion 12: disk portion 16: connecting portion 20: breakable connecting portion 42: bottle opening 52: connecting portion 54: root portion 56: arc-shaped portion

Claims (3)

An annular ring that is concentrically located outside the disk part in a stopper comprising a cylindrical body part having a fitting wall that fits into the inner wall of the bin mouth, and a disk part that is crowned on the upper part of the body part A grip part, a connecting part for connecting a part of the outer peripheral edge of the disk part and a part of the inner peripheral edge of the annular handle part, and a breakable connection for connecting the disk part and the annular handle part so as to be breakable A connecting portion that is connected to the connecting portion, a root portion that is a portion extending in the circumferential direction from the connecting portion, and the connecting portion and the root portion. The arc-shaped part excluding
A plug in which the radial thickness of the root portion is 90% or less of the radial thickness of the arcuate portion in the circumferential direction. The stopper according to claim 1 , wherein a central angle of viewing the connecting portion from the center of the disk portion is 10 to 120 degrees. It is a stopper of Claim 1 or 2 , Comprising: Thickness of the site | part which is applied to a 1.8 liter bottle, and becomes the tightest in the state where the fitting with the inner wall of the said bottle mouth is plugged A plug whose tw is 0.4 to 2 mm.

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