JPS5850757Y2 - Structure related to screw cap and container opening - 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. The purpose is to prevent the assembled screw cap from becoming unscrewed.

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 weight gain containers and tube containers.

This screw cap has the advantage of being easy to structure and manufacture and having a large sealing force, but 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 attempting to open the container by loosening the screw cap on the container, excessive force is often required, making it difficult to open the container, and the above-mentioned strong tightening may not be performed for a long period of time. If left unattended, the screw cap and the material from which the container is molded could become fatigued and cause undesirable permanent deformation, making it impossible to maintain the container hermetically.

The present invention was devised in order to solve the conventional drawbacks and problems related to the structure related to the screw cap and the container mouth described above. When the threaded assembly reaches its limit for sealing, a locking protrusion protruding from the screw cap abuts against the threaded assembly, and an abutment piece is provided to prevent further rotation of the threaded assembly; When this locking protrusion locks with the abutment piece, the locking body is fixed immovably, with a protrusion provided at the tip of the elastic piece that locks the locking protrusion from the direction of rotation to unthread the engagement. This is what I did.

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 as follows:
A locking protrusion 18 is provided on the lower end portion of the inner surface of the cap 14, and at least the mouth tube portion 2 of the container 1 is connected to the locking protrusion 18.
The screwing assembly of the cap 14, which has a projecting piece 12 protruding from the distal end on the base end of the assembly cylinder 8, involves a projecting piece 11 extending in the rotational direction, and a projecting piece 12 of the projecting piece 12. The locking body 7, which is provided with abutment pieces 10 which are bulged in number so as to face each other at a distance a from the tip thereof, is immovably assembled and fixed, and the cap 14 is attached to the mouth tube part 2.
When the locking protrusion 18 is assembled to the screwing limit that seals the
The elastic piece 11 is elastically deformed so as to pass over the projecting piece 12 and abut against the abutting piece 10, so that the elastic piece 11 is set in a positional relationship in which the elastic piece 11 is almost perfectly engaged within the interval a.

By the way, the direction in which the locking protrusion 18 is in elastic contact with the protrusion 12, that is, the direction in which the elastic piece 11 is elastically deformed, is the direction in which the elastic piece 11 is deformed toward the center from the assembled attitude of the cap 14 with respect to the mouth tube part 2. , or deformed downward.

1 to 8 show an embodiment in which the bullet 11 is configured to deform toward the center, and FIGS. 9 to 16 show an embodiment in which the bullet 11 is configured to elastically deform downward. This figure shows an example in which

First, the configuration of the embodiment shown in FIGS. 1 to 7 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 is assembled using a cylindrical assembly tube 8 that fits snugly between the shoulder surface 5 and the lower surface of the flange 4, and a thread 15 of the cap 14 on the outer peripheral surface of the assembly tube 8. A thread 9 is provided to be screwed together with the abutment piece 10 and a bullet piece 1 at the lower end.
1 is formed.

This locking body 7 must be assembled to the mouth tube part 2 in such a manner that it cannot be removed and cannot be rotated, but in the case of the illustrated embodiment, this assembling that cannot be rotated is done as a means. As shown in FIG. 4, this is achieved by engagement by an engagement piece 6 provided in the shape of a vertical strip between the outer circumferential surface of the mouth tube portion 2 and the inner circumferential surface of the assembled cylinder 8.

An abutting piece 1 provided at the lower end of the locking body 7 so as to bulge outward.
0, the locking protrusion 18 formed on the step 17 formed on the lower end of the inner surface of the cap 14, which moves downward as the screwing of the cap 14 progresses, reaches the lowering limit at which it reaches the screwing limit. The locking protrusion 18 is provided at a position where there is no problem with the downward displacement up to, that is, a position where the locking protrusion 18 does not come into contact with it from above, and on the rotation locus of the locking protrusion 18 when viewed in plan.

On the other hand, the elastic piece 11 provided opposite to the abutting piece 10 at a distance a forms a notch 13 between it and the outer surface of the assembled cylinder 8, and only the protruding piece 12 is locked when viewed from above. The projecting piece 18 is located in a protruding position on the rotation locus, and the bullet piece 11 itself is provided so as to be located within this rotation locus.

In FIG. 1, reference numeral 3 denotes a top surface that is the upper end surface of the mouth barrel portion 2, and 16 is a seal strip that is pressed against the top surface 3 to achieve sealing of the container 1.

The embodiment shown in FIGS. 1 to 7 has the above-described structure, so that the cap 14 can be immovably assembled to the mouth tube part 2 by screwing it into the fixed locking body 7. As the locking protrusion 18 approaches the end of the screw engagement, the locking protrusion 18 abuts against the protrusion 12 provided outwardly at the tip of the bullet piece 11. When the cap 14 is further rotated despite the collision, the locking protrusion 18 moves over the protrusion 12 without elastically deforming the bullet 11 toward the center, and the cap 14 reaches the screwing limit position. That is, at a position where the sealing strip 16 is tightly pressed against the top surface 3 of the mouth, as shown by the dotted line in FIG.

At this time, since the locking protrusion 18 has completely crossed over the protrusion 12, the bullet 11 has elastically returned, and therefore the protrusion
2 is positioned protruding on the rotation locus of the locking protrusion 18, so that when the locking protrusion 18 rotates in the direction of unscrewing the cap 14 from the container 1, the locking protrusion 18 It will be locked to the piece 12.

The illustrated embodiment in FIG. 8 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 portion 4, which is directly molded and which immovably assembles and holds the locking body 7 on the mouth tube portion 2, protrudes directly below the outer circumferential surface of the mouth tube portion 2 where the thread 9 is molded. .

The embodiment shown in FIGS. 9 to 15 differs from the embodiment shown in FIGS. The only difference is the positional relationship with respect to the protruding piece 18.

That is, in the case of the embodiment shown in FIGS. 9 to 15, the locking protrusion 18 is provided in a hanging position and protrudes from the stepped portion 17 formed near the lower end of the inner surface of the cap 14.
Further, the abutment piece 10 and the bullet piece 11 are arranged so as to be located on the rotation locus of the locking protrusion 18 when viewed in plan.

The abutting piece 10 abuts when the locking protrusion 18 rotates and descends to the screwing limit, but has a height at which it does not hit the locking protrusion 18 at the rotating position before reaching this screwing limit. Naturally, a notch 13 is formed between the bullet piece 11 and the mounting shoulder surface 5 for elastically deforming the bullet piece 11. A projecting piece 12 is provided at the top extending end.
is installed protrudingly.

The upper surface of this bullet piece 11 is an inclined surface that descends from the abutment piece 10 toward the tip of the bullet piece 11 along the slope of the thread 9, and the cap 14 is screwed until it is close to the screwing limit. When assembled together, the lowering movement of the locking protrusion 18, which moves downward while rotating, is not hindered.

The embodiment shown in FIG. 16 is similar to the embodiment shown in FIG. This is what I did.

Since the present invention has the above-mentioned configuration, the container 1
When the cap 14 reaches the screwing limit where it is sealed by the cap 14, the locking protrusion 18 abuts against the abutting piece 10, and the cap 14 cannot be further screwed and rotated in the direction. 14 to the container 1 can be reliably prevented from being excessively tightened.

Further, when the cap 14 reaches the screwing limit, the locking protrusion 1
8 is positioned almost exactly within the interval a, so that when the cap 14 is rotated in the direction of unscrewing, the locking protrusion 18 is engaged with the protrusion 12, and therefore Unless a rotational force is intentionally applied to the cap 14 in the opening direction, the cap 14 will not rotate in the opening direction.

In the case of the embodiments shown in FIGS. 1 to 7 and 9 to 8, the locking body 7 is assembled over almost the entire mouth part 2, so that it is firmly attached to the container 1. This fixed assembly has the advantage that configurations that are distantly related to fixation can be freely selected and set.

On the other hand, the embodiments shown in FIGS. 8 and 16 have the advantage that the locking body 7 can be newly assembled to the container 1 formed by an existing mold.

In any case, in the present invention, the locking body 7 is a separate object from the container 1, so it is not limited to the molding material of the container 1, which is required to be molded with a relatively soft synthetic resin.
The locking body 7 can be molded from a relatively rigid and elastic synthetic resin material that is suitable for the movement of the locking 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.

As is clear from the above description, the present invention can reliably prevent excessive screwing of the screw cap onto the container, and thereby the screwing assembly of the cap and the container can cause material fatigue in the parts. There is absolutely no trouble in opening the cap, and the inconvenience of the cap screwing up naturally loosening due to vibrations during transportation can be completely prevented. It is possible to prevent objects from leaking out, and 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 use, production, and implementation.

[Brief explanation of drawings]

Figures 1 to 8 show an embodiment of the present invention configured to elastically deform the bullet piece in the center direction by a locking protrusion, and Figure 1 shows the main part of the container with the cap attached. Figure 2 is a vertical front view of the main part of the container side only, Figure 3 is a vertical front view of the main part of the container side only.
Figure 4 is a plan view of the container side, Figure 4 is a partial sectional view of the container side crossing the mouth tube, Figure 5 is a side view of the container side, Figure 6 is a longitudinal sectional side view of the container side, and Figure 7 is a side view of the container side. This figure is a bottom view of the cap, and FIG. 8 is a longitudinal sectional front view of the container side showing another embodiment that operates in the same manner as the embodiment shown in FIGS. 1 to 7. Figures 9 to 16 show other embodiments of the present invention in which the bullet is elastically deformed downward by the locking protrusion, and Figure 9 shows the container with the cap attached. Main part longitudinal sectional front view, Fig. 10 is a front view of the container side, Fig. 11 is a side view of the container side, Fig. 12 is a vertical sectional front view of the container side, Fig. 1
3 is a plan view of the container side, FIG. 14 is a partial cross-sectional plan view of the container side that crosses the mouth tube, and FIG. 15 is a bottom view of the cap.
FIG. 16 is a vertical sectional front view of the container side showing another embodiment that operates in the same manner as the embodiment shown in FIGS. 9 to 15. FIG. Explanation of symbols 1... Body, 2... Mouth tube part, 3... Mouth top surface, 4... Flam part, 5...
...Assembly is done on the shoulder surface, 6...Engagement piece, 7...
... Locking body, 8 ... Assembled cylinder, 9 ...
...Thread, 10... Butt piece, 11...
・Bullet piece, 12... Projection piece, 13... Notch, 14... Cap, 15... Thread, 16... Seal strip, 17... step part,
18... Locking protrusion, a... Interval.

Claims (1)

[Scope of utility model registration request] In a container that can be opened and closed with a screw cap, at least the base end of the mouth tube part 2 of the container 1, and the assembled tube 8 that is the base body,
A projecting piece 12 is provided protrudingly at the tip, and the screwing assembly of the cap 14 is bulged so that the tip of the bullet piece 11 extending along the rotation direction is located opposite to the tip of the bullet piece 11 with a distance a. Butting piece 1
The locking body 7 provided with 0 is immovably assembled and fixed, and the protruding piece 12 is attached to the lower end portion of the inner surface of the cap 14 by elastically deforming the elastic piece 11 at the limit of screwing the cap 14 onto the container 1. A structure relating to a screw cap and a container mouth portion, which is provided with a locking protrusion 18 that is almost perfectly engaged within the interval a when it crosses over and abuts against the abutment piece 10.