JPH03240653A - Cap with inner stopper - Google Patents

Abstract

PURPOSE:To permit an accurate movement of an inner stopper from a cap to the neck of a container before and after stoppering the bottle neck and avoid having an outwardly projecting part such as a flange around the peripheral part by providing, as an engaging means, a hole formed at the top of the inner stopper and a locking projection formed at the outer peripheral surface of the stopper extending vertically downwardly from the top of the cap and capable of being inserted into the hole. CONSTITUTION:When a stopper 8 is inserted into a hole 16, a locking projection 11 on the outer peripheral surface of the stopper 8 is extended slightly beyond the edge of the hole 16 and, therefore, so constructed as to allow the peripheral edge of the hole 16 to easily clear the locking projection 11 and to impart an engaging force to such an extent as to prevent the detachment of an inner stopper 3 from a cap 2 after the aforesaid clear of the stopper 8. The axial force required to disengage this part is smaller than the axial force required to disengage an overhanging part 14 from an engaging projection 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cap with an inner stopper for preventing leakage of a container for packaging liquid detergent, shampoo, or other liquid contents.

[Prior Art] As caps for packaging containers for liquid detergents, shampoos, and other liquid contents, caps with inner stoppers are used to prevent liquid leakage.

The conventional cap with inner plug is cap with inner plug 1 shown in Fig. 2.
01, a screw 102 serves as a fitting means to the container 103.
A cap main body 104 is made of a relatively hard material and has a fitting cylinder part 110 provided with the like, and a cap body 104 is made of a relatively soft material and has an outer diameter that can be inserted into the fitting cylinder part 110. It also consists of an inner stopper 107 having an undercut 106 or the like on its inner peripheral surface as a means for fitting with the container opening 105.

In order to facilitate handling at the production stage and in particular to avoid increasing or complicating the process of attaching to the container, the inner stopper 107 is attached to the container so that it can be integrated with the cap body 104 in advance and is fixed thereto. Thereafter, the cap body 104 is configured to be detachable from the container independently of the inner stopper 107, or in other words, the inner stopper is configured to move from the cap body to the container opening when attached.

In order to enable such transfer of the inner plug 107, the cap body 104 and the inner plug 107 are provided with mutual engagement means, and in the conventional cap 101 with an inner plug, the inner plug 107 is An outwardly protruding portion, for example, the flange 108, is provided on the outer circumference, and an inwardly protruding portion, for example, an annular undercut 111, is provided on the inner circumferential surface of the cap body 104, and the inner plug 107 is attached to the cap. When it is fitted into the main body 104, the flange 108 goes over the undercut 111, and from then on, the engagement between the two prevents the inner stopper from falling off and the two are integrated. When screwed onto the container opening, the undercut 1 of the inner stopper described above will be created.
06 is the overhang part 1 provided at the container mouth part 105
12, the inner stopper 107 fits into the container opening 105, and thereafter, by attaching and removing the cap body 104, the inner stopper 107 fits into the container opening 105.
It was configured so that it would not fall off from 5.

[Problems to be Solved by the Invention] However, in the cap with an inner plug configured in this manner, the inner plug 107 has an outwardly protruding portion such as the flange 108, which impairs the appearance. There was a problem that if the contents adhered to the parts and hardened, or if dirt adhered to the parts, it would become unclean.

This invention has been made in view of the above circumstances, and is capable of reliably transferring the inner plug from the cap to the container mouth before and after being attached to the container mouth, and furthermore, has a flange on the outer periphery. It is an object of the present invention to provide a cap with an inner stopper that does not have an outwardly projecting portion such as the above, has a good appearance, and is free from the risk of spoiling the appearance due to adhesion of dust or the like.

[Means for Solving the Problems 1] Corresponding to this object, a cap with an inner stopper of the present invention has a cap main body having a cylindrical portion provided with means for fitting with a container, and an outer diameter that can be inserted into the cylindrical portion. and an inner stopper having means for fitting into a container mouth portion on the inner circumferential surface, and the cap body and the inner stopper have mutual engagement means, wherein the engaging means is It is characterized by a locking protrusion provided on the outer peripheral surface of a hole provided in the top wall of the inner stopper and a column that hangs down from the top plate of the cap body and can be inserted into the hole.

[Operation 1] In the cap with an inner stopper configured as described above, the inner stopper can be inserted into the cylindrical part of the cap body, and the pillar part of the cap main body can be inserted into the hole of the inner stopper. When inserted, the peripheral edge of the hole on the top plate of the inner plug gets over the locking protrusion provided on the column, and after getting over the locking protrusion, the inner plug is locked by the locking protrusion. , integrated with the cap body.

When the imaged cap body of the cap with inner stopper is fitted into the container by the container fitting means, the inner stopper is pressed against the container opening by the top plate of the cap, thereby The means for fitting the inner circumferential surface of the stopper to the container mouth works, the inner stopper fits into the container mouth, and the transition of the inner stopper to the container mouth is completed.

Thereafter, each time the cap body is attached or detached, the hole periphery passes over the locking protrusion of the column, and the inner stopper remains fitted into the container mouth.

Since there are no protrusions on the outer circumferential surface of the inner stopper, the aesthetic appearance is not impaired and the adhesion of dirt and the like is also prevented.

[Embodiment 1] Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.

In FIG. 1, 1 is a cap with an inner stopper. A cap with an inner plug 1 includes a cap body 2 and an inner plug 3.

The cap body 2 has a cylindrical portion 6 provided with a screw 5 as a means for fitting with the container 4. The upper end of the cylinder part 6 is closed by a top plate part 7, and a column part 8 hangs down from the center part of the top plate part 7.

The column portion 8 has a cylindrical shape and has an annular locking protrusion 11 projecting outward on its outer peripheral surface.

The inner stopper 3 has a fitting cylindrical portion 12 having an outer diameter smaller than the inner diameter of the cylindrical portion 6 of the cap body 2. The fitting cylindrical portion 12 is provided with an annular fitting protrusion 13 projecting inward on the inner peripheral surface of one end side. The fitting protrusion 13 is pressed from below to an overhang 14 provided on the outer peripheral surface of the container mouth 4a to fit into the container mouth.

An upper plate portion 15 projects inward from the other end of the fitting cylinder portion 12. The positional relationship between the top plate portion 15 and the fitting protrusion 13 is as follows:
The positional relationship is such that when the top plate portion 15 is pressed against the upper end surface of the container mouth portion 4a, the fitting protrusion 13 rides over the overhang portion 14 and comes into pressure contact with the lower surface thereof.

The upper plate part 15 has a hole 16 in the center, and the hole 16 has a diameter approximately equal to the outer diameter of the frame part 8 of the cap body 2, into which the frame part 8 can be inserted.

The above-mentioned locking protrusion 11 on the outer peripheral surface of the frame portion 8 is configured to slightly protrude outward from the edge of the hole 16 when the frame portion 8 is inserted into the hole 16. 8 into the hole 16, the peripheral edge of the hole 16 can easily get over the locking protrusion 11, and after getting over the locking protrusion 11, the inner stopper 3 can be prevented from falling off from the cap body 2. The force in the axial direction required to release the engagement of this part is the same as that of the overhang part 14 and the fitting protrusion 13.
The axial force is smaller than the axial force required to release the mating. Therefore, even if the cap body is displaced upward in the axial direction to release the engagement between the locking protrusion 11 and the peripheral edge of the hole 16, the engagement between the overhang part 14 and the fitting protrusion 13 is not released. This allows the cap body 3 to be attached to and detached from the container independently of the inner stopper.

[Effects of the Invention] As is clear from the above description, according to the present invention, the inner stopper can be reliably transferred from the cap to the container opening before and after being attached to the container opening, and moreover, the outer periphery of the inner stopper It is possible to obtain a cap with an inner plug that does not have an outwardly protruding part such as a flange, and therefore has a good appearance and is free from the risk of spoiling the appearance due to adhesion of dust or the like.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a cap with an inner stopper according to an example of the present invention, and FIG. 2 is a longitudinal sectional view showing a conventional cap with an inner stopper. 1... Cap with inner stopper, 2... Cap body,
3...Inner stopper, 4...Container, 6...Cylinder part,
7... Top plate part, 8... Frame part, 11... Locking protrusion, 12... Fitting cylinder part, 13
... Fitting protrusion, 14... Overhang part,
15... Top plate part, 16... Hole Figure 2 ○7

Claims (1)

[Claims] The cap comprises a cap main body having a cylindrical portion provided with means for fitting into the container, and an inner plug having an outer diameter that can be inserted into the cylindrical portion and having means for fitting into the mouth of the container on the inner peripheral surface. In the cap with an inner stopper, the main body and the inner stopper have mutual engagement means, and the engagement means hangs down from a hole provided in a top wall of the inner stopper and a top plate of the cap main body, and is inserted into the hole. A cap with an inner plug characterized by a locking protrusion provided on the outer circumferential surface of the plug.