JPS6333817Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure related to a screw cap and a container opening that is opened and closed by the screw cap, and the screw cap is screwed into the opening of the container to the limit in order to keep the container airtight. The purpose is to prevent the assembled screw cap from becoming unscathed.

Another purpose is to eliminate the problem of deterioration in the function of the sealing part and the difficulty of opening the cap due to unnecessarily tightening the screw cap.

Screw caps are often used to open and close various containers, such as bottles and tubes.

This screw cap has the advantage of being easy to structure and manufacture, and has a large sealing force, but on the other hand, it has the disadvantage that the screws naturally loosen due to vibration during transportation or fatigue of the material. .

For this reason, conventionally, even if the container has been sealed, this type of screw cap has generally been tightened even more strongly to prevent loosening.

For this reason, when the screw cap is unscrewed from the container and an attempt is made to open the container, excessive force is required, making it difficult to open the container. If left unattended, the screw cap and the material from which the container was formed could become fatigued and cause undesirable permanent deformation, making it impossible to maintain a tight seal on the container.

The present invention was devised in order to solve the conventional drawbacks and problems related to the structure related to the screw cap and container mouth described above. When the threaded assembly reaches its limit, the locking protrusion protruding from the screw cap abuts against it and makes further rotation of the screw cap impossible. A locking body is immovably assembled and fixed, and is provided with a protrusion that locks onto the locking protrusion from the rotating direction of unscrewing when the piece locks on the abutment piece.

Embodiments of the present invention will be described below with reference to the drawings.

The structure of the screw cap and container opening according to the present invention is such that a locking protrusion 16 is provided at the lower end portion of the inner surface of the cap 12, and at least the proximal end of the mouth barrel portion 2 of the container 1 is connected to the locking protrusion 16. A protruding piece 11 is provided protrudingly on the assembly tube 8 serving as a base body, and a protruding piece 11 is provided so as to be located opposite to this protruding piece 11 with a distance a between the cap 12 and the cap 12 in the screwing and assembling rotation direction. The locking body 7 provided with the abutting piece 10 is immovably assembled and fixed,
When the cap 12 is assembled to the screwing limit that seals the mouth part 2, the locking protrusion 16 passes over the protrusion 11 and abuts against the abutting piece 10, so that the cap 12 is almost tightly fitted within the interval a. They are configured to be set in a positional relationship in which they are engaged.

By the way, the direction in which the locking protrusion 16 is in elastic contact with the protrusion 11 is determined by whether the protrusion 11 is pressed toward the center or downward, depending on the assembled posture of the cap 12 with respect to the mouth barrel portion 2. It will be one of the following.

1 to 4 show an embodiment configured to press the protrusion 11 toward the center, and FIGS. 5 to 9 show an embodiment configured to press the protrusion 11 downward. This is an example.

First, the configuration of the embodiment shown in FIGS. 1 to 3 will be explained.

In the illustrated embodiment, the mouth tube part 2 has a simple cylindrical shape, but a collar part 4 for assembling and holding the locking body 7 is provided around the outer periphery of the upper end.

The locking body 7 has a cylindrical assembly tube 8 that fits snugly between the assembly shoulder surface 5 and the lower surface of the flange 4 as a base body, and a cap 1 is attached to the outer peripheral surface of this assembly tube 8.
A thread 9 that is threadedly engaged with the thread 13 of No. 2 is provided, and an abutting piece 10 and a projecting piece 11 are formed at the lower end.

This locking body 7 must be attached to the mouth tube portion 2 in such a manner that it cannot be removed from the mouth and cannot be rotated. As shown in FIG. 2, this is achieved by engagement by an engagement piece 6 provided in a vertical strip shape between the outer circumferential surface of the mouth tube portion 2 and the inner circumferential surface of the assembled tube 8.

The abutting piece 10 provided at the lower end of the locking body 7 and bulging outward is a step formed at the lower end of the inner surface of the cap 12 that moves downward as the screwing of the cap 12 progresses. The position where the locking protrusion 16 formed on the holder 15 does not interfere with the downward displacement until reaching the lowering limit which is the screwing limit, that is, the position where the locking protrusion 16 does not hit from above, and when viewed from above, this engagement is It is provided so as to be located on the rotation locus of the stopper piece 16.

On the other hand, the protruding piece 11 provided opposite to the abutting piece 10 at a distance a is similar to the locking protruding piece 16 when viewed from above.
It is provided so as to protrude from the rotation locus of.

In FIG. 4, reference numeral 3 denotes a mouth top surface which is the upper end surface of the mouth barrel portion 2, and numeral 14 denotes a sealing strip that is pressed against this mouth top surface 3 to achieve sealing of the container 1.

The embodiment shown in FIGS. 1 to 3 has the above-mentioned configuration, so that the cap 12 is fixedly assembled to the mouth barrel portion 2 and is screwed into the locking body 7. Then, just before the screwing limit, the locking protrusion 1
6 hits the protrusion 11, but when the cap 12 is further rotated despite the locking protrusion 16 hitting the protrusion 11, the locking protrusion 16 forcibly climbs over the protrusion 11. At the position where the cap 12 has reached its screwing limit, that is, at the position where the seal strip 14 is tightly pressed against the mouth surface 3, it is in a state where it abuts against the abutting piece 10, as shown by the dotted line in Figure 2, and within the interval a. It engages almost perfectly.

At this time, the locking protrusion 16 completely overcomes the protrusion 11, so the protrusion 11
Therefore, the locking protrusion 16 is engaged with this protrusion 11 when the cap 12 is rotated in the direction of unscrewing from the container 1. It turns out.

The embodiment shown in FIG. 4 shows a structure in which the locking body 7 is assembled only to the proximal end of the mouth barrel part 2, and the thread 9 is attached to the mouth barrel part 2 like a normal container 1. The flange 4, which is directly molded, and which immovably assembles and holds the locking body 7 on the mouth tube portion 2, is provided immediately below the outer circumferential surface of the mouth tube portion 2 on which the thread 9 is formed.

The embodiment shown in FIGS. 5 to 8 differs from the embodiment shown in FIGS. The only difference is the positional relationship with respect to the stopper piece 16.

That is, in the case of the embodiments shown in FIGS. 5 to 8, the locking protrusion 16 is provided in a hanging position and protrudes from the stepped portion 15 formed near the lower end of the inner surface of the cap 12. The abutting piece 10 and the protruding piece 11 are arranged so as to be located on the rotation locus of the locking protruding piece 16 when viewed in plan.

The abutting piece 10 abuts when the locking protrusion 16 rotates and descends to the screwing limit, but has a height at which it does not hit the locking protrusion 16 at the rotating position before reaching this screwing limit. Naturally, the protrusion 11 is provided so as to abut against the locking protrusion 16 only when the cap 12 has been rotated downward to near the screwing limit.

The upper surface of the part where this protruding piece 11 is provided extends approximately from the abutting piece 10 along the slope of the thread 9.
1 is a sloped surface that descends toward the tip thereof, and when the cap 12 is screwed together to near the screwing limit, the locking protrusion 16 moves downward while rotating. It is designed not to cause any trouble.

The embodiment shown in FIG. 9 is similar to the embodiment shown in FIG. It is something.

Since the present invention is constructed as described above, when the container 1 reaches the screwing limit where the cap 12 is sealed, the cap 12 is closed by the locking protrusion 16 abutting against the abutment piece 10. Further rotation in the direction of screwing and assembling becomes impossible, and therefore, excessive screwing and tightening of the cap 12 to the container 1 can be reliably prevented.

Further, when the cap 12 reaches the screwing limit, the locking protrusion 16 is almost tightly engaged within the interval a, so that against rotation of the cap 12 in the direction of unscrewing, The locking protrusion 16 will be locked to the protrusion 11, so unless a rotational force is intentionally applied to the cap 12 in the opening direction, the cap 1 will not open.
2 does not cause rotation in the opening direction.

In the case of the embodiments shown in FIGS. 1 to 3 and 5 to 8, the locking body 7 is attached to the mouth tube portion 2.
Since it can be assembled over almost the entire part of container 1
There is an advantage that the assembly can be made strong, and the configuration for achieving the immovable assembly and fixation can be freely selected and set.

On the other hand, in the case of the embodiments shown in FIGS. 4 and 9, the container 1 is molded using an existing mold.
There is an advantage that the locking body 7 can be newly assembled.

In any case, in the present invention, since the locking body 7 is a separate object from the container 1, the locking body 7 is not limited to the molding material of the container 1, which is required to be molded from a relatively soft synthetic resin. The locking body 7 can be molded from a relatively rigid and elastic synthetic resin material that is compatible with the movement of the body 7, and can be designed to have a structure that is easy to mold as a single unit.

This means that the structure of the container 1, whose main purpose is to house the contents, does not have to be complicated, and the container 1 can be molded in a better and more convenient manner.

Furthermore, since the projecting piece 11 is simply provided to protrude from the lower part of the assembly tube 8, the locking body 7
The overall structure is extremely simple, which makes it easy to mold the locking body 7, and since elastic deformation does not occur locally, there is no risk of fatigue of the molding material, which allows for a long life. Good operation can be maintained for a period of time, and the locking protrusion 1
When 6 forcibly climbed over the protrusion 11, there was a “snap”.
A sound is generated, and the feeling of use is extremely pleasant.

As is clear from the above description, the present invention can reliably prevent excessive screwing of the screw cap onto the container, thereby causing material fatigue in the threaded assembly portion of the cap and container. There is absolutely no trouble in opening the cap, and the inconvenience of the cap screw assembly loosening naturally due to vibrations during transportation can be completely prevented, making it easy to open the cap. Furthermore, since the locking body 7 is a single unit, it is easy to mold not only the locking body 7 but also the container 1, and suitable molding materials can be freely selected and used. It has many excellent and beneficial effects in terms of use, production, and implementation.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention in which the protrusion is pressed toward the center by the locking protrusion, and Fig. 1 shows the cap with the cap assembled. Figure 2 is a longitudinal sectional front view of the main parts of the container shown by imaginary lines, Figure 2 is a plan view showing the positional relationship with the cap with broken lines showing part of the container side, Figure 3 is a bottom view of the cap, and Figure 4 is a FIG. 4 is a longitudinal sectional front view of the container side showing another embodiment that operates in the same operating mode as the embodiment shown in FIGS. 1 to 3. FIG. 5 to 8 show other embodiments of the present invention in which the protrusion is pressed downward by the locking protrusion,
Fig. 5 is a longitudinal sectional front view of the main part of the container with the cap assembled, showing the cap in virtual lines, Fig. 6 is a side view of the container side, and Fig. 7 is a partially cutaway plan view of the container side. Figure 8 is the bottom view of the cap, Figure 9 is the bottom view of the cap, and Figure 9 is the bottom view of the cap.
FIG. 9 is a longitudinal sectional front view of the container side showing another embodiment that operates in the same operating mode as the embodiment shown in FIGS. Explanation of symbols, 1...Container, 2...Mouth part, 3...
...Top of mouth surface, 4...Brim portion, 5...Assembling shoulder surface, 6...
...Engagement piece, 7...Locking body, 8...Assembled cylinder, 9...
...Thread, 10... Butting piece, 11... Protruding piece, 12
... Cap, 13 ... Thread, 14 ... Seal thread, 15 ... Step, 16 ... Locking protrusion, a ... Interval.

Claims (1)

[Scope of utility model registration request] In containers opened and closed with screw caps,
At least at the base end of the mouth barrel portion 2 of the container 1, a projecting piece 11 is provided to protrude from the assembly tube 8 serving as the base body, and a cap 12 is provided.
The locking body 7, which is provided with the projection piece 11 and the abutment piece 10 which is bulged out and positioned opposite to the protrusion piece 11 at a distance a, is immovably assembled and fixed to the cap. Cap 1 is attached to the lower end of the inner surface of 12.
A screw cap and a container opening are provided with a locking protrusion 16 that crosses over the protrusion 11 and abuts against the abutment piece 10 at the end of screwing into the container 1 of 2, and engages almost tightly within the interval a. structure related to the department.