JP5560395B2 - Container with inner stopper - Google Patents

Description

The present invention relates to a container with a stopper.

There are many containers with internal stoppers that use internal stoppers that close after the contents are filled in containers that contain liquids and the like. Common internal plugs are fitted inside the mouth portion of the container, and in particular, when the internal plug is fitted by press-fitting, many of the internal plugs cannot be easily removed.

The conventional container with an inner stopper was discarded when the shampoo and cosmetics were used up, so there was no need to remove the inner stopper, so it was not easy to open the inner stopper and the inner stopper did not open during use. However, recently, the number of refill containers for refilling and reusing only the contents has increased, so that a container with an inner stopper that facilitates opening of the inner stopper (see Patent Document 1) is used. It has become.

JP 2007-91293 A

However, when removing the inner plug, there are many cases where the engagement of the inner plug is released at the tip of the nail, and it is never easy to remove the inner plug. In addition, there is a problem that the inner plug is easy to loosen, and that the inner plug is loosened during repeated use.

Therefore, an object of the present invention is to provide a container with an inner stopper that can be removed for a long period of time by removing the inner stopper with a simple operation.

The container with an inner stopper of the present invention has a container body having a cylindrical mouth portion, a discharge port for contents in the container body, and a cylindrical side surface that is screw-engaged with the cylindrical mouth portion of the container body. A container with an inner stopper, comprising an inner cap and an outer cap having a cylindrical side surface that is screw-engaged with the side surface of the inner plug, wherein the inner surface of the side surface of the inner plug and the outer surface of the mouth of the container body The inner plug is engaged with the container main body by screw engagement, and the outer cap is engaged with the inner surface of the outer cap by screw engagement between the outer surface of the side surface of the inner plug and the inner surface of the side surface of the outer cap. The lead angle of the screw engaged with the inner plug and the outer cap is larger than the lead angle of the screw engaged with the inner plug and the container main body.

Then, the outer cap and the inner plug are screw-engaged, and an undercut provided on the inner surface of the side surface of the inner plug and a locking projection provided on the outer surface of the mouth portion are engaged. .

The container with an inner stopper of the present invention has a container body having a cylindrical mouth portion, a discharge port for contents in the container body, and a cylindrical side surface that is screw-engaged with the cylindrical mouth portion of the container body. A container with an inner stopper, comprising an inner cap and an outer cap having a cylindrical side surface that is screw-engaged with the side surface of the inner plug, wherein the inner surface of the side surface of the inner plug and the outer surface of the mouth of the container body The inner plug is engaged with the container main body by screw engagement, and the outer cap is engaged with the inner surface of the outer cap by screw engagement between the outer surface of the side surface of the inner plug and the inner surface of the side surface of the outer cap. Since the lead angle of the screw engaged with the inner plug and the outer cap is larger than the lead angle of the screw engaged with the inner plug and the container body, the outer cap and the inner plug Can be removed easily, and the internal plug It can be used for a long time without the state being loosened.

Furthermore, the outer cap and the inner plug are screw-engaged, and an undercut provided on the inner surface of the side surface of the inner plug and a locking projection provided on the outer surface of the mouth part are engaged, The engagement state of the inner plug can be maintained more firmly.

It is sectional drawing of a container with an inside stopper. It is a partially expanded sectional view of a container with an inside stopper. It is a partially cutaway partial perspective view of a container with an inner stopper in a state where an outer cap and an inner stopper are removed. It is a fragmentary perspective view of the container with an inside stopper in the state where the outer cap was removed. It is a figure showing lead angle (beta).

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view of a container 1 with an inner plug, FIG. 2 is a partially enlarged cross-sectional view, FIG. 3 is a perspective view with the outer cap 4 and the inner plug 3 removed, and FIG. FIG.

As shown in FIGS. 1 to 3, the container 1 with an inner stopper of the present invention has a container body 2 having a cylindrical mouth portion 5, and a cylindrical side surface 8 that is screw-engaged with the mouth portion 5 of the container body 2. An inner cap 3 and an outer cap 4 having a cylindrical side surface 14 that is screw-engaged with a side surface 8 of the inner plug 3. The inner cap 3 is removed and new contents are put into the container body 2. Used as a refill container such as shampoo that is used repeatedly.

The container body 2 has a bottle shape with a thin upper part, the mouth part 5 is formed in a cylindrical shape at the upper part of the body, a thread 6 is provided on the outer surface of the mouth part 5, and the outer surface of the mouth part 5 is A locking protrusion 7 is formed above the screw thread 6 so as to protrude outward and to make one round of the outer surface. The shape of the container body 2 is not limited to the bottle shape, and other shapes can be used.

The inner plug 3 is provided with a discharge port 13 for discharging the contents accommodated in the container main body 2 at the center of the upper surface, and the side surface 8 used for screw engagement with the container main body 2 and the outer cap 4. A cylindrical insertion portion 9 to be inserted into the mouth portion 5 is formed inside, and a convex portion 18 is formed so as to surround the discharge port 13.

The side surface 8 is provided with a step, the upper part has a cylindrical shape with a step smaller in radius than the lower part, and the inner surface of the cylindrical part having a larger radius at the lower part has a thread 6 and a screw on the mouth part 5. A thread 10 for engagement is formed, and a thread 11 is formed on the outer surface. Two of the screw threads 11 are formed in parallel. Furthermore, an undercut 12 that engages with the locking protrusion 7 is formed at the lower end of a cylindrical portion having a small radius that corresponds to the stepped portion of the inner surface of the side surface 8 so as to make one round of the inner surface of the side surface 8. ing.

The outer cap 4 includes an upper surface serving as a lid, a cylindrical side surface 14 used for screw engagement with the side surface 8 of the inner plug 3, and a substantially cylindrical outer cover 15 that forms an outer appearance. Is provided with a packing 17 for increasing the degree of sealing. On the inner surface of the side surface 14, there is provided a thread 16 that engages with a thread 11 provided on the outer surface of the side surface 8 of the inner plug 3. As with the thread 11, two threads 16 are formed in parallel.

Since all the screw threads 6, 10, 11, 16 are formed in a spiral shape in the same direction, the screw engagement between the container body 2 and the inner plug 3 and the screws of the inner plug 3 and the outer cap 4 are performed. Engagement is rotated in the same direction when tightening and opening. Therefore, when the inner cap 3 and the outer cap 4 are closed with the screw engagement having the same shape, the inner cap 3 may be rotated when the outer cap 4 is opened.

Therefore, by making the force necessary to loosen the inner plug 3 larger than the force necessary to loosen the outer cap 4, the inner plug 3 can be opened when the outer cap 4 is opened. Rotate to prevent it from opening. If such a relationship is formed, the inner plug 3 cannot be opened with the force required to open the outer cap 4, and the inner plug 3 does not rotate. In order to form the screw threads 6, 10, 11, 16 so as to achieve such screw engagement, the lead angle of the screw is used.

The lead angle of a screw is an angle (indicated by β in FIG. 5) formed by a thread winding and a plane perpendicular to the axis of the screw passing through one point on the screw winding. If the angle is small, the screw is easy to tighten and not easy to loosen, and if the lead angle is large, the screw is difficult to tighten and easy to loosen. Therefore, the lead angles of the threads 11 and 16 used for the screw engagement between the outer cap 4 and the inner plug 3 are the same as those of the screw threads 6 and 10 used for the screw engagement between the inner plug 3 and the container body 2. The pitch of the threads 6, 10, 11, 16 is determined so as to be smaller than the lead angle.

As an example (see FIG. 2), the pitch L1 of the thread 16 of the outer cap 4 and the thread 11 of the inner plug 3 is 3.81 cm, and the radius R1 of the outer surface of the side surface 8 of the inner plug 3 is 12. The pitch L2 of the thread 10 of the inner plug 3 and the thread 6 of the mouth 5 of the container body 2 is 2.54 cm, and the radius R2 of the outer surface of the mouth 5 is 10 cm. Incidentally, since the two screw threads 11 and 16 are formed in parallel, in the cross-sectional view of FIG. 2, two threads are one pitch.

Assuming that the lead angle of the thread is β, the radius of the surface on which the thread is formed is R, and the pitch of the thread is L, one pitch advances when the thread makes one round. The relationship shown in FIG. 5 is established. Thereby, the following formula 1 is established. Using Equation 1, when the lead angle of the threads 11 and 16 is β1, and the lead angle of the threads 6 and 10 is β2, respectively, Equation 2 is obtained.

Thus, the lead angle β1 of the threads 11 and 16 is 2.3135 °, and the lead angle β2 of the threads 6 and 10 is 2.7538 °, and as a result, β2> β1. Therefore, since the force required to loosen the inner plug 3 is larger than the force required to loosen the outer cap 4, even if the outer cap 4 is rotated to open, the inner plug 3 The inner plug 3 is kept in engagement with the container main body 2 without being opened.

An engaged state body of the inner plug 3 and the outer cap 4 using the threads 6, 10, 11, 16 formed in this way will be described. First, the engagement between the inner plug 3 and the container body 2 will be described.

When the inner plug 3 is placed over the mouth portion 5 of the container body 2 and rotated rightward so as to be engaged with the mouth portion 5 of the container body 2, the thread 6 of the mouth portion 5 and the inner stopper 3 3 thread 10 engages with the screw, and the inner plug 3 moves downward while tightening. At this time, the insertion portion 9 of the inner plug 3 is inserted inside the mouth portion 5, and the upper end of the mouth portion 5 is inserted between the insertion portion 9 and the side surface 8 of the inner stopper 3. Finally, as shown in FIG. 2, the undercut 12 of the inner plug 3 moves below the locking projection 7 of the mouth portion 5, and the undercut 12 and the locking projection 7. Is engaged, the engagement between the inner plug 3 and the mouth portion 5 of the container body 2 is completed, and the state shown in FIG. 4 is obtained.

In this manner, with the inner plug 3 engaged with the container body 2, the contents stored in the container body 2 are discharged from the discharge port 13, and the container body 1 with an inner plug is used. At this time, as described above, since the inner plug 3 is firmly engaged with the container body 2 by the screw engagement of the threads 6 and 10 and the engagement of the undercut 12 and the locking projection 7, During use, the inner plug 3 does not come off easily.

Next, the outer cap 4 is screw-engaged with the inner plug 3 attached to the container body 2. The outer cap 4 is put on the inner plug 3 and rotated rightward to engage with the inner plug 3. As a result, as shown in FIGS. 1 and 2, the thread 11 of the inner plug 3 and the thread 16 of the outer cap 4 are engaged with each other, so that the outer cap 4 is engaged with the inner plug 3. . At this time, the outer cap 4 is not directly engaged with the container body 2.

Further, when the outer cap 4 is engaged with the inner plug 3, the packing 17 comes into close contact with the upper end portion of the inner plug 3, and the convex portion 18 formed on the upper surface of the inner plug 3 has the packing 18. In this state, the container body 2 is tightly sealed, and the contents are prevented from leaking from the discharge port 13.

When the outer cap 4 is removed, a force for rotating the outer cap 4 in the left direction is applied. Then, as described above, the lead angle β1 of the screw engagement between the outer cap 4 and the inner plug 3 is smaller than the lead angle β2 of the screw engagement between the inner plug 3 and the container body 2. Since the screw engagement between the outer cap 4 and the inner plug 3 is released before the screw engagement between the inner plug 3 and the container body 2 is released, the outer plug 4 does not come off and the outer plug 4 is removed. Only cap 4 comes off. At this time, the engagement between the undercut 12 and the locking projection 7 also serves to prevent the engagement between the inner plug 3 and the container body 2 from being released.

When the inner plug 3 is removed in order to insert new contents after the contents have disappeared, if the inner plug 3 is rotated counterclockwise by applying a stronger force than when removing the outer cap 4 from the inner plug 3 Then, the engagement of the undercut 12 and the locking projection 7 and the screw engagement of the threads 6 and 10 are released, and the inner plug 3 can be removed.

Thus, since the container 1 with the inside stopper of the present invention can be opened separately by simply turning the inside stopper 3 and the outer cap 4, the work of exchanging the contents becomes easier than before. Further, since the inner plug 3 is engaged with the container main body 2 using screw engagement, even if the inner plug 3 is repeatedly opened and closed, the engagement state of the inner plug 3 is long without loosening. It can be used for a period.

DESCRIPTION OF SYMBOLS 1 Container with inner stopper 2 Container body 3 Inner stopper 4 Outer cap 5 Portion 6 Screw thread 7 Locking protrusion 8 Side face 9 Insertion part 10 Screw thread 11 Screw thread 12 Undercut 13 Outlet 14 Side face 15 Outer cover 16 Screw thread 17 Packing 18 Convex

Claims (2)

A container main body having a cylindrical mouth, a discharge port for contents in the container main body, an inner stopper having a cylindrical side surface screw-engaging with the cylindrical mouth of the container main body, and a side surface of the inner stopper A container with an inner cap comprising an outer cap having a cylindrical side surface that is screw-engaged with the inner cap,
The inner plug is engaged with the container main body by screwing the inner surface of the side surface of the inner plug and the outer surface of the mouth of the container main body,
The outer cap is engaged with the inner plug by the screw engagement between the outer surface of the side surface of the inner plug and the inner surface of the side surface of the outer cap,
By reducing the pitch of the screw that engages the inner plug and the outer cap from the pitch of the screw that engages the inner plug and the container body , the screw that engages the inner plug and the container body than the lead angle, it is the size no longer lead angle of the screw in which the outer cap and said in plug is engaged, is rotated in a direction of removing the outer cap, threaded engagement between the container body and the in plug Before the release, the screw engagement between the outer cap and the inner plug is released, and only the outer cap is removed without removing the inner plug.
The outer cap and the inner plug are screw-engaged, and an undercut provided on the inner surface of the side surface of the inner plug and a locking projection provided on the outer surface of the mouth portion are engaged. The container with an inner stopper according to claim 1.