JPH0239953Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a synthetic resin cap equipped with a pilfer-proof ring.

[Prior art and its problems]

Generally, the synthetic resin cap that seals the mouth of the bottle has a pill-proof ring (hereinafter abbreviated as P-P-ring) to confirm whether the bottle is unopened or opened. ) is provided.

The inventor of this invention previously published Utility Application No. 59-11568 (Sho 60).
-123308) P.P. shown in Figures 3 and 4.
We proposed a synthetic resin cap (hereinafter abbreviated as cap) equipped with a ring. This cap 1
is a cap body 2, a PP ring 3 provided below this cap body 2, and this PP ring 3.
and a bridge 4 which connects the cap body 2 to each other with a slight gap between them are integrally molded from synthetic resin.

The cap main body 2 is composed of a disk-shaped top plate 2a and a cylindrical tube portion 2b extending downward from the peripheral edge of the top plate 2a. A female screw portion 2c screws together with a male screw portion 5a on the outer periphery of the bottle mouth 5 to which the bottle opening 5 is attached.
is formed. Further, the cylindrical portion 2b is formed such that its lower end extends to the top position of a PP ring locking bulge 5b formed by bulging outward under the male screw portion 5a of the bottle mouth 5. has been done.
The bridge 4 is attached to the lower end surface of the cylinder portion 2b.
is provided.

The bridges 4 are in the form of small thin pieces, and are integrally formed so as to slightly extend downward from the lower end surface of the cylindrical portion 2b of the cap body 2 at equal intervals in the circumferential direction. The PP ring 3 is continuously provided at the lower end of these bridges 4.

The PP ring 3 has a cylindrical shape, and a stepped PP ring is formed at the bottom of the PP ring locking bulge 5b of the bottle mouth 5 with a diameter slightly reduced from the bulge 5b.
It is provided at a position surrounding the ring attachment portion 5c. The inner diameter of the inner circumferential surface 3a of the PP ring 3 is slightly larger than the outer diameter of the PP ring attachment part 5c of the bottle mouth 5, and the inner circumferential surface 3a is located slightly inward from the inner circumferential surface of the bridge 4. It is formed in such a way that it comes to As a result, between the inner circumferential surface 3a of the PP ring 3 and the inner circumferential surface of the bridge 4, there is a sloped portion 3 whose inner diameter is gradually reduced downward.
b is formed. Furthermore, a ring supporting projection 3c is formed at the lower part of the inner circumferential surface 3a of the PP ring 3 and projects inward in a narrow annular shape.
This ring support protrusion 3c has an inner diameter of the bottle mouth 5.
It is slightly smaller than the outer diameter of the PP ring mounting part 5c. As a result, the above PP ring 3 is connected to the bottle mouth 5.
When the ring support protrusion 3 is attached to the
c on the PP ring attachment part 5c, and a gap 6 is formed between the inner circumferential surface 3a and the PP ring attachment part 5c above the ring support protrusion 3c. There is. A tapered portion 3d is formed between the lower part of the ring support projection 3c and the lower end of the PP ring 3, the inner diameter of which gradually increases downward.

When the cap 1 is attached to the bottle spout 5, the female screw portion 2c of the cap body 2 is screwed into the male screw portion 5a of the bottle spout 5 and tightened. At this time,
The tapered portion 3d at the lower end of the PP ring 3 is gradually pushed outward and lowered by the PP ring locking bulge 5b of the bottle mouth 5. Then, when the cap body 2 is further tightened, the taper portion 3d
After passing through the bulge 5b, the ring support protrusion 3c located at the upper part contracts inward due to elastic restoring force and comes into close contact with the outer peripheral surface of the PP ring attachment part 5c. And the above cap 1 is PP ring 3
The cap body 2 is attached to the bottle spout 5 with the cap main body 2 tightened until the inclined portion 3b is located below the PP ring locking bulge 5b of the bottle spout 5.

In addition, when the cap 1 is first opened from the bottle spout 5, when the cap body 2 is rotated in a reverse screw direction relative to the bottle spout 5 and raised, the inclined portion 3b of the PP ring 3 engages with the PP ring of the bottle spout 5. After climbing over the locking bulge 5b, the ring supporting protrusion 3c is locked to the lower part of the PP ring locking bulge and is prevented from rising. By further rotating the cap main body 2, the thin small pieces of bridges 4 are cut. For this reason, in this cap 1, the cap body 2 and the PP ring 3 are separated from each other.
As a result, the opening of the cap 1 from the bottle opening 5 can be visually observed.

By the way, in this cap, when the cap 1 is installed, the PP ring 3 is attached to the PP ring attachment part 5c of the bottle mouth 5.
The ring support protrusion 3c supported above can be easily attached to the bottle spout 5, and there is little frictional resistance between the ring support protrusion 3c and the bottle spout 5 when rotating when opening the cap body 2.
PP ring 3 is used so that the rotation can be done relatively lightly.
When the ring support protrusion 3c is formed to have a narrow width, a gap 6 is formed between the inner circumferential surface 3a between the ring support protrusion 3c and the bridge 4, and the PP ring attachment part 5b of the bottle mouth 5. be done. Then, in this cap 1, the above-mentioned PP is
If force is applied to the ring 3 or if force is applied to the bottom end of the PP ring 3 to turn it outward,
The PP ring 3 will bend toward the gap 6. For this reason, if a strong force as described above is locally applied to the PP ring 3, there is a risk that the bridges 4 may be cut off by the shearing force. Also, with this cap 1, all the bridges 4 may not be cut at once when the cap is opened.
In such a case, as shown in Figure 5, the above P.
The portion of the P. ring 3 that remains uncut and connected to the bridge 4 is pulled upward as the cap body 2 rises. Therefore, the part of the PP ring 3 that receives the upward tensile force is inclined toward the gap 6, and the part located on the opposite side in the diametrical direction hangs downward, resulting in an inclined state as shown in the figure. It may become. When the cap body 2 is rotated in this state, the PP tilts.
The ring 3 is further pulled upward, and the ring supporting protrusion 3c rides on the PP ring locking bulge 5b of the bottle mouth 5 and gets caught in it, preventing the cap body 2 from rotating smoothly. There have been rare cases where the problem has occurred where it becomes difficult to open due to obstruction.

[The problem that the idea attempts to solve]

This idea was made in view of the above circumstances,
The object of the present invention is to provide a synthetic resin cap that can prevent shearing force from acting on the bridge of the cap when it is attached, and can also prevent the PP ring from tilting when the cap is opened.

[Means for solving problems]

The synthetic resin cap of this invention is positioned above the ring support protrusion on the inner surface of the pilf-proof ring, and when the cap is opened, the cap is raised and the ring support protrusion is located at the bottom of the pilf-proof ring locking bulge. When locking, an auxiliary protrusion is provided which goes over the top of the pilfer-proof ring locking bulge at the mouth of the container body by elastic deformation.

[Effect]

In the cap of this invention, an auxiliary protrusion is provided above the ring support protrusion on the inner surface of the PP ring of the cap, so that the PP ring is attached to the PP ring attachment part of the container at two locations above and below the ring support protrusion and the auxiliary protrusion. in close contact with or in close proximity to the outer surface of the Therefore, even if force is applied to the PP ring from the outside, the PP ring will not bend easily. Therefore, with this cap, there is no possibility that shearing force due to the deflection of the PP ring will act on the bridge.

In addition, in the cap of this invention, when the cap is raised when the cap is opened and the ring supporting protrusion of the cap engages with the PP ring retaining protrusion at the mouth of the container body, the auxiliary protrusion is activated. It will go over the top of the PP ring locking bulge, so at the above position
The PP ring has the above protrusion and ring support protrusion.
The PP ring will be locked with the top of the locking bulge sandwiched between them. Therefore, if you further rotate the cap body, the PP ring will move as described above.
All bridges are cut while remaining securely locked to the PP ring locking bulge.

〔Example〕

FIGS. 1 and 2 show an embodiment of the cap of this invention, and the same reference numerals as those shown in FIGS. 3 and 4 are given, and the explanation thereof will be omitted.

In Figures 1 and 2, P of cap 7.
P. Ring support protrusion 3c on inner peripheral surface 3a of ring 3
Auxiliary protrusions 8 projecting toward the gap 6 are provided at an upper portion. These auxiliary projections 8
When the cap 7 is opened and the ring supporting protrusion 3c is engaged with the lower part of the PP ring retaining bulge 5b, the PP ring retaining bulge 5b of the bottle opening 5 is elastically deformed. It is formed in a position and size that allows it to pass over the top of the The auxiliary protrusions 8 provided on this cap 7 are respectively connected to the PP ring 3.
A plurality of small protrusions are formed at equal intervals in the circumferential direction of the inner circumferential surface 3a of the bottle, and each tip is formed so as to lightly abut the PP ring attachment part 5c of the bottle mouth 5. .

In a cap with such a structure, even when force is applied to the PP ring 3 from the outside, the PP ring 3 is attached to the PP ring mounting portion 5c of the bottle mouth 5 at two locations above and below the ring support protrusion 3c and the protrusion 8... Because it is supported by the base, it does not easily tilt or bend. Therefore, in this cap 7, there is no possibility that shearing force will be applied to the bridges 4 due to the bending or inclination of the PP ring 3.

Also, in this cap 7, when the cap body 2 is rotated and raised when opening, the protrusions 8...
At a position where it elastically deforms and climbs over the ring locking bulge 5b, the ring support protrusion 3c is locked at the lower part of the PP ring locking bulge 5b. Therefore, at the above position, the PP ring 3 is moved to the above protrusion 8...
The protrusion 3c and the inner circumferential surface 3a will be locked with the PP ring locking bulge 5b sandwiched therebetween. Therefore, when the cap body 2 is further rotated, all the bridges 4 are cut off while the PP ring 3 remains securely locked to the PP ring locking bulge 5a as described above. , the package can be opened smoothly.

Moreover, when the cap 7 is attached, the projections 8... are P.
Since it is in a state where it lightly contacts the P. ring attachment part 5c, the frictional force will not increase when the cap body 2 rotates, and there is no fear that it will become difficult to rotate.

Note that the auxiliary protrusion 8 provided on the cap of the above embodiment
... were provided at equal intervals in the circumferential direction, but it goes without saying that similar effects can be obtained even if the auxiliary protrusions are continuous over the entire circumference.

[Effect of idea]

As explained above, the synthetic resin cap of this invention is integrally molded with a separable bridge at the bottom of the cap body, and the ring support of the PP ring is provided with a ring support protrusion that protrudes inward. When the ring support protrusion is engaged with the lower part of the bulge for retaining the PP ring during opening, the PP at the mouth of the container body is elastically deformed.
An auxiliary protrusion is provided to get over the top of the ring locking bulge.

Therefore, according to the cap of this invention, the following effects can be obtained.

In the cap of this invention, an auxiliary protrusion is provided above the ring support protrusion on the inner surface of the PP ring, so the PP ring is attached to the PP ring attachment part of the container body in two places, upper and lower, by the ring support protrusion and the auxiliary protrusion. It is in close contact with or close to the outer surface, and P.
Even if force is applied to the P ring, the PP ring will not bend easily. Therefore, this cap can prevent shearing force from acting on the bridge due to the bending of the PP ring, and can eliminate the problem of the bridge being cut when the cap is attached.Furthermore, in the cap of this invention, When opening the container, the cap is raised and the P.
P. When the ring support protrusion of the cap is engaged with the ring retaining bulge, the auxiliary protrusion is
It goes over the top of the ring locking bulge, so
At the above position, the PP ring is locked with the top of the PP ring locking bulge sandwiched between the projection and the ring support projection. Therefore, if the cap body is further rotated, the PP
All bridges are cut while the rings remain securely locked in the PP ring locking bulges as described above. Therefore, the cap of this invention allows for smooth opening.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the cap of this invention, with Figure 1 being a partially sectional front view, Figure 2 being a sectional view of the main parts, and Figures 3 to 5.
The figures show a conventional cap; Fig. 3 is a partially sectional front view, Fig. 4 is a sectional view of the main part, and Fig. 5 is a sectional view of the main part.
The figure is a schematic diagram showing the state when the package is opened. 1...Cap (synthetic resin cap), 2...
... Cap body, 3 ... PP ring, (pilfer-proof ring), 3a ... Inner peripheral surface, 3c ...
Ring support protrusion, 4... Bridge, 5... Bottle mouth, 5b... PP ring locking protrusion, 5c...
PP ring attachment part, 6... Gap part, 7... Cap (synthetic resin cap), 8... Auxiliary protrusion.

Claims (1)

[Claims for Utility Model Registration] A threaded portion is formed in the upper part, and a bulge portion for locking the pilf-proof ring is formed below the screw portion to bulge outward, and the bulging portion for locking the pilf-proof ring is formed below the screw portion. A cap body used for closing the mouth of a container body, which is formed by connecting a pilfer-proof ring attachment part whose diameter is slightly smaller than that of the bulge at the lower part of the bulge, and the lower part of the cap body. A synthetic resin cap consisting of a pilf-proof ring provided on the cap body, and a bridge connecting the pilf-proof ring and the cap main body while separating them from each other, the cap having a pilf-proof ring on the lower part of the inner surface of the pilf-proof ring. When the cap is attached to the opening of the container main body, it is located at the position of the pill-proof ring attachment part of the opening of the container main body, and when the cap is lifted up during opening, the cap is located at the mounting part of the pill-proof ring of the opening of the container main body. A ring support protrusion is provided that protrudes from the lower part of the locking bulge to prevent the pilf-proof ring from rising. When the ring is raised and the ring support protrusion locks with the lower part of the pilf-proof ring locking bulge, it gets over the top of the pilf-proof ring locking bulge at the mouth of the container body due to elastic deformation. A synthetic resin cap characterized by the provision of auxiliary protrusions.