JP4780822B2 - Container mouth and cap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap combined with a mouth portion of a container such as a bottle for sealing the container.
[0002]
[Prior art]
Conventionally, a container sealing mechanism between a container mouth portion and a cap member that is detachably fitted to the mouth portion has a convex shape that is spirally attached to the outer periphery of a generally cylindrical container mouth portion as shown in FIG. The strip and the concave portion between the convex strips spirally attached to the inner peripheral surface of the cap formed of a cylindrical skirt portion suspended from the peripheral portion of the top plate are screwed together. The fitting part of this type of container has an opening history clarification mechanism generally called a tamper evident band. This is a mechanism in which the tamper evidence band is cut and the fact is clearly shown if the cap is opened before the consumer opens the cap after shipment from the factory. There are two types of this tamper-evident band, one that cuts when the cap is rotationally displaced beyond the allowable range, and the other is in the axial direction beyond the allowable range as the cap rotates. This type is cut when displaced. When the displacement of the cap is within an allowable range, the tamper-evidence band cannot be cut off, and it is necessary to ensure the sealing of the contents during the displacement within the range. As shown in FIG. 7 , the container seal of the conventional form in which the protrusion 6 spirally attached to the outer periphery of the container mouth 1 and the recess 7 between the protrusions spirally attached to the inner peripheral surface of the cap 2 are screwed together. In the stop mechanism, the rotational displacement of the cap is accompanied by the axial displacement of the mouth corresponding to the spiral gradient. Therefore, the displacement allowed by the tamper-evidence band 5 is designed so that the inner ring 8 and the outer ring 9 having a height covering the range as shown in FIG. Countermeasures such as providing the plate 21 have been taken. Further, it is desired that the seal is stably maintained in a state where the cap 2 is closed even during the use period after the opening. This means that when the cap 2 is closed, it is desired to secure a seal even if it is not completely closed to the end position, even if it is in a slightly near position. For this purpose, the container mouth 1 and the cap 2 The seal pressure applied between them had to keep a value sufficient to ensure the seal, and the spiral gradient had to be made small. Therefore, when removing and closing the cap, many rotational displacements were required, and the hand grip had to be divided into several times. Moreover, even if the gradient is reduced, the axial displacement of the mouth portion accompanying the rotational displacement inevitably causes a change in the sealing pressure, and the sealing performance at that time is sacrificed.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned problems, i.e., to fit the container mouth and the mouth so that the sealing performance of the container is maintained within the displacement of the cap allowed by the tamper-evidence band. Providing a container sealing mechanism between the cap members and providing the container sealing mechanism that does not require a large amount of rotational displacement for opening and closing the cap.
[0004]
[Means for Solving the Problems]
The container sealing mechanism part between the container mouth part and the cap member fitted to the mouth part is fitted and guided into the recessed groove formed in the outer peripheral surface of the container mouth part or the inner peripheral surface of the cap. A combination of pin-like independent protrusions provided on the inner peripheral surface of the cap or the outer peripheral surface of the container mouth, or a form comprising pin-like independent protrusions and protrusions for engaging and guiding, wherein the guide is used to close the cap. In the vicinity of the end portion, it is provided in parallel with the container mouth end surface so that there is no change in the sealing pressure with a slight displacement in the vicinity of the closing end portion, and at least a low gradient followed by a higher gradient 2 in the continuous portion. Rutotomoni provided inclined guide grooves consisting of stages, the inclined guide groove and the rotation angle that can be opened and closed by one touch, and configured to be open and close the cap by a tamper-Ebidento band provided to the skirt portion the lower end of the cap.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention started with the purpose of simply opening and closing a cap with a few rotational displacements while changing the grip halfway to open and close the cap. It is only necessary to increase the inclination angle of the spiral provided in the container mouth portion and the cap. However, in such a case, there is a problem that the cap is loosened and the sealed state is insufficiently secured during normal distribution and store display. Also, in the case of the conventional cap, when the tamper-evidence band is cut when the cap is rotationally displaced, the sealing pressure between the cap and the container mouth decreases before the tamper-evidence band is cut. There arises a problem that securing of the state becomes insufficient. Therefore, in the present invention, it was conceived that the axial displacement of the rotational displacement in the vicinity of the closing end portion is made as small as possible, and the rotational displacement in the continuous portion increases the axial displacement. This is impossible with the conventional container sealing mechanism in which the container mouth portion and the cap are screwed together, which is formed by the concavo-convex ridge having a constant inclination angle. Therefore, the present invention employs a combination of a guide groove having a different inclination angle according to the position and a pin-like independent protrusion fitted to the groove as a guide mechanism in which the relationship between rotational displacement and axial displacement is not constant. I came up with the idea. Since one of the fitting members is a pin-like independent protrusion, the bent portion and the nonlinear guide groove can be freely followed.
[0006]
FIG. 1A shows a cap of the present invention, the left half is a view showing a partial cross section, and B is a view showing a container mouth. As shown in FIG. 1B, the cylindrical outer peripheral surface of the container mouth portion 1 includes a spiral guide portion 31 having a larger inclination angle than the mouth end portion, and a guide portion 32 parallel to the mouth end surface in the vicinity of the terminal end of the extension. As shown in FIG. 1A, a pin-like independent protrusion 22 is provided on the inner peripheral surface of the skirt portion of the cap 2. When the cap is closed, the independent protrusion 22 is fitted and locked to the parallel guide portion 32 of the guide groove 3 in the vicinity of the end portion, so that the mouth end portion of the container and the top of the cap are fixed with a predetermined sealing pressure. The plate 21 is sealed and kept sealed. And even if a slight rotational displacement is given near the end part before or during use, there is no axial displacement, so the seal pressure may change and liquid leakage may occur. The tamper-evidence band is not loaded until it is opened by a person. Now, although the form which provided the guide ditch | groove 3 in the outer peripheral surface of the container mouth part 1, and provided the pin-shaped independent protrusion 22 in the cap inner peripheral surface was shown, this invention is not limited to this, and it inclines in the cap inner surface side. In the form of providing a guide concave groove consisting of a spiral guide part with a large corner and a guide part parallel to the mouth end face in the vicinity of the terminal end of the extension, and providing a pin-like independent protrusion on the outer peripheral surface on the container mouth side Even if there is, the same function can be realized. Since the present invention uses a combination of an independent protrusion and its guiding means in order to give a nonlinear characteristic to the cap opening / closing displacement, it is accompanied by a phenomenon that stress concentration occurs in the independent protrusion due to the structure. . Accordingly, one design condition is that the independent protrusion has a strength that can withstand a load of a sealing pressure applied at the time of sealing. It is also an important requirement that the cap top surface be formed of a material having elasticity that ensures a seal with the outer end surface of the container mouth when sealed.
[0007]
[Example 1]
Examples of the present invention will be described in detail. As shown in FIG. 1B, the outer peripheral surface of the end portion of the container mouth portion 1 is slightly cut to form a thin-walled portion 11, while the plastic cap top surface portion 21 has the outer peripheral surface as shown in FIG. 1A. A seal ring 23 having a concave cross section that comes into contact with the thin portion 11 of the container mouth portion 1 that has been slightly shaved is provided, and when the pin-like independent projection 22 is in the parallel guide portion 32 in the vicinity of the terminal portion, The thin-walled portion 11 at the mouth end and the seal ring 23 are pressed against each other to ensure the sealing of the container. Examples of the material resin for the plastic cap include various plastics such as low, medium and high density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene and ABS resin. The plastic cap of the present invention is usually produced by injection molding, compression molding or the like using the above resin. The seal ring 23 is made of low-density polyethylene, ethylene copolymer, various rubbers or thermoplastic elastomers, acrylic resin plastisol, vinyl chloride resin plastisol, etc., which are rich in elasticity, in order to enhance the sealing effect. The seal ring can be made of various plastics whose cap itself has elasticity, such as olefin resins such as polyethylene, polypropylene, propylene-ethylene polymer, propylene-butene 1 copolymer; acrylonitrile-styrene-butadiene. (ABS resin); impact-resistant styrene resin; acrylic resin; nylon resin and other resins are not necessary. Further, as shown in FIG. 2, a plurality of independent protrusions 22 are arranged on the inner peripheral surface of the cap, and the concave groove 3 combined therewith is also provided on the outer peripheral surface of the container mouth corresponding to the same interval as the independent protrusion 22. The same number is formed at the position, and the plurality of fitting locks cooperate to guide opening and closing of the cap while maintaining the parallelism between the top plate surface and the container mouth outer end surface. In this embodiment, as shown in FIG. 3, three sets of independent projections 22 and concave grooves 3 are fitted and locked, and the parallel guide portion 32 has a low gradient of 30 degrees in the circumferential direction and 60 degrees and 60 degrees. There is an inclined guide portion 31 having a high gradient, which is arranged in the container mouth portion 1 at intervals of 120 degrees. At this time, the three sets of independent protrusions 22 to be fitted to this are naturally disposed on the inner peripheral surface of the cap 2 at the same 120 degree interval. The three sets of guide grooves 3 may overlap in the circumferential direction as long as the positions in the axial direction are different, and in this case, there are overlapping regions over 30 degrees at three locations. In this embodiment, the cap can be removed from the container by rotating 120 degrees, the cap can be opened and closed with one touch without changing the grip, and a low-gradient guide is provided following the parallel guide 32. Therefore, the sealed state can be secured stably, there is no risk of liquid leakage before and during use, and no load is applied to the tamper-evidence band.
[0008]
[Example 2]
A different embodiment of the invention is shown in FIG. In this embodiment, three independent protrusions 22 are provided on the outer peripheral surface of the container mouth portion 1 at intervals of 120 degrees, and three guide grooves 3 fitted and locked therewith are provided on the inner peripheral surface of the cap 2. The guide groove 3 is different from the one shown in FIG. 3 in that the slope of the parallel guide 32 is 30 degrees in the circumferential direction, a low gradient of 60 degrees and a high gradient of 60 degrees. It consists of a shape guide 31. The difference from the previous embodiment is that the gradient is positive and negative, and the position of the independent protrusion 22 and the guide groove 3 is opposite to the container mouth 1 and the cap 2.
[0009]
[Example 3]
A modified embodiment of the present invention is shown in FIG. This embodiment is the same as the first embodiment in that three independent protrusions 22 are provided on the inner peripheral surface of the cap 2 at intervals of 120 degrees. It is characterized in that it is formed as a groove portion between the parallel ridges 46 provided on the outer peripheral surface of the portion. The guide groove 4 is different from that shown in FIG. 2 in that the guide groove 4 is not formed in the outer peripheral surface of the container mouth portion but is a groove between the ridges 46. The parallel guide portion 42 includes a spiral guide portion 41 having a low gradient of 30 degrees in the circumferential direction, a low gradient of 60 degrees, and a high gradient of 60 degrees.
[0010]
[Example 4]
A different modified embodiment of the invention is shown in FIG. This embodiment is the same as the embodiment 2 in that three independent protrusions 22 are provided on the outer peripheral surface of the container mouth portion 1 at intervals of 120 degrees. In this embodiment, three guide grooves 4 fitted and locked therewith are provided as grooves between the parallel protrusions 46 on the inner peripheral surface of the cap 2. The guide groove 4 is not formed in the inner peripheral surface of the cap 2 but is a groove between the ridges 46, and is different from that shown in FIG. 30 degrees, 60 degrees, and a spiral guide 41 having a low gradient of 60 degrees and a high gradient of 60 degrees.
[0014]
【The invention's effect】
The container sealing mechanism part of the present invention comprises a combination of a guide groove formed on the outer peripheral surface of the container mouth and a pin-like independent protrusion provided on the inner peripheral surface of the cap fitted in the groove. Therefore, it is not necessary to keep the inclination angle of the guide concave groove constant like a screw groove, and multi-stage bending is possible. Taking advantage of this degree of freedom, the concave groove is provided in parallel with the outer end face of the container mouth in the vicinity of the closing end of the cap so that a slight rotational displacement of the cap in the vicinity of the closing end does not cause a displacement in the mouth axial direction. In addition, in a continuous portion, a combination of a low gradient and a high gradient is employed so that sealing, opening and closing can be performed with a small rotational displacement. A slight rotational displacement of the cap in the vicinity of the closing end does not cause a displacement in the axial direction of the mouth, so that no load is applied to the tamper-evident band for the allowable rotational displacement, and the seal pressure Because there is no change, no liquid leakage occurs. Even during the period of use after opening the cap, the same sealing state is realized without completely closing to the closing end when sealing with a cap, so that no liquid leakage occurs and the cap is less opened and closed Since it can be realized by rotational displacement, it is not necessary to re-hold and it is easy to use.
[Brief description of the drawings]
FIG. 1 is a diagram showing a basic configuration of the present invention.
FIG. 2 is a diagram showing one embodiment of the present invention.
FIG. 3 is a view showing the positional relationship of guide grooves in an embodiment of the present invention.
FIG. 4 is a diagram showing another embodiment of the present invention.
FIG. 5 is a diagram showing a modified embodiment of the present invention.
FIG. 6 is a diagram showing another modified embodiment of the present invention.
FIG. 7 is a diagram showing a configuration of a conventional container mouth and cap.
[Explanation of symbols]
1 Container mouth 4 Guide groove
11 Thin part 41 Inclined guide part 2 Cap 42 Parallel guide part
21 Top plate 46 Projection
22 Independent projection 5 Tamper-evidence band
23 Seal ring 6 ridge 3 guide groove 7 recess between ridges
31 Inclination guide 8 Inner ring
32 Parallel guide 9 Outer ring

Claims (6)

The sealing mechanism between the container mouth and the cap member fitted to the mouth is formed by a groove formed on the cylindrical outer peripheral surface of the container mouth and the inner periphery of the skirt of the cap fitted in the groove. in the form of a combination of pin-like independent protrusions provided on the surface, the groove is parallel to the container extraoral end surface in the vicinity of the closed end of the cap, the portion in the high gradient more Following the low gradient continuous thereto at least Rutotomoni provided inclined guide grooves consisting of two stages, the inclined guide groove and the rotation angle that can be opened and closed by one touch, the container opening and a cap having a tamper-Ebidento band to the skirt portion the lower end of the cap. The sealing mechanism part between the container mouth part and the cap member fitted to the mouth part is fitted into the recessed groove formed between the ridges on the cylindrical outer peripheral surface of the container mouth part. in the form of a combination of pin-like independent protrusions provided on the skirt portion inner peripheral surface of the cap, the groove is parallel to the container extraoral end surface in the vicinity of the closed end of the cap, followed by a low gradient at a portion contiguous thereto Te provided more inclined guide groove consisting of at least two stages of high gradient Rutotomoni, the inclined guide groove and the rotation angle that can be opened and closed by one touch, the container opening and a cap having a tamper-Ebidento band to the skirt portion the lower end of the cap . The sealing mechanism part between the container mouth part and the cap member fitted to the mouth part has a pin-like independent protrusion formed on the outer peripheral face of the container mouth part and the inner peripheral face of the skirt part of the cap for fitting the independent protrusion. The groove is formed in the form of a combination of concave grooves provided on the cap, and the concave groove is parallel to the top surface of the cap in the vicinity of the closed end of the cap, and has a low gradient and a higher gradient in the continuous portion. Rutotomoni provided inclined guide grooves consisting of stages, the inclined guide groove and the rotation angle that can be opened and closed by one touch, the container opening and a cap having a tamper-Ebidento band to the skirt portion the lower end of the cap. The sealing mechanism part between the container mouth part and the cap member fitted to the mouth part has a pin-like independent protrusion formed on the outer peripheral face of the container mouth part and the inner peripheral face of the skirt part of the cap for fitting the independent protrusion. The groove comprises a combination of concave grooves formed between the upper ridges, and the concave grooves are parallel to the cap top plate surface in the vicinity of the closed end of the cap , followed by a low gradient in the continuous portion. Rutotomoni provided inclined guide groove consisting of at least two stages of high gradient, the inclined guide groove and the rotation angle that can be opened and closed by one touch, the container opening and a cap having a tamper-Ebidento band to the skirt portion the lower end of the cap. Grooves or convex Article to be combined with independent protrusions, 1 to claim at positions of the outer peripheral surface of the skirt portion inner peripheral surface or the container mouth portion of the cap are a plurality arranged is intended to guide the opening and closing of the cap 4. The container mouth part and cap of 4. The independent protrusion is made of a material having a strength sufficient to withstand the load of the sealing pressure applied at the time of sealing, and an elastic material that ensures a seal between the cap top surface and the container mouth end surface at the time of sealing. The container mouth part and cap of Claims 1 thru | or 5 made into design conditions.

Images