JP2022186053A - Capped container - Google Patents

Abstract

To provide a capped container which allows easy re-attachment of a cap by capping.SOLUTION: A mouth-side thread is formed by arranging a predetermined number of threads 12a at predetermined intervals. In the cap side threads, the number of threads 24a greater than the number of threads 12a of the mouth-side thread provided side by side so that a space is narrower than a space between the threads 12a of the mouth-side thread, and a space between the threads 12a of the mouth-side threads is a multiple of a space between the threads 24a of a cap-side thread 24 on the inner peripheral surface of a side wall portion 23 of a cap, along the circumferential direction of the inner peripheral surface of the side wall portion 23, and are provided at a height lower than a height of the thread 12a of the mouth-side thread. The cap side thread is formed by making a cross-sectional shape of a concave portion of the thread 24a of the cap-side thread 24 the same as a cross-sectional shape of a convex portion of the thread 12a of the mouth-side thread, and is fitted with the mouth-side thread 25 by capping.SELECTED DRAWING: Figure 6

Description

The present invention relates to capped containers.

Conventionally, there is a technology related to capped containers from which the capped cap can be easily removed from the mouth.

Japanese Patent Application Laid-Open No. 2019-151354 (Patent Document 1) discloses a discharge container having a double-structured container body, a discharge cap, and a check valve. The container main body includes an outer layer body and a volume-reducing and deformable inner layer body housed inside the outer layer body, and has an outside air inlet at the mouth portion. The discharge cap has a top wall portion provided with a discharge port for the content and a cylindrical side wall portion connected to the top wall portion, and is attached to the mouth portion by plugging. The check valve is provided inside the discharge cap and opens and closes the flow path of the contents toward the discharge port. The container body is a blow-molded product formed by blow-molding a preform assembly in which an inner preform made of a material different from that of the discharge cap is incorporated inside an outer preform made of a material different from that of the discharge cap. The discharge container further includes a mouth-side engaging portion, a cap-side engaging portion, a plurality of mouth-side threads, and a plurality of cap-side threads. The mouth portion side engaging portion is provided on the outer peripheral surface of the mouth portion. The cap-side engaging portion is provided on the inner peripheral surface of the side wall portion and is undercut-engaged with the mouth-side engaging portion by plugging. The plurality of mouth-side threads are provided on the outer peripheral surface of the mouth, respectively, and are arranged side by side at intervals in the circumferential direction to form a multi-thread. The plurality of cap-side threads are provided on the inner peripheral surface of the side wall portion, respectively, and are arranged side by side at intervals in the circumferential direction to form a multi-start thread and between a pair of adjacent mouth-side threads. , which slides against the mouth-side thread to exert an upward force on the discharge cap when the discharge cap rotates relative to the mouth. As a result, the discharge cap can be easily detached from the outer mouth of the container body, while the discharge cap is attached to the outer mouth of the container body by plugging and has a high tamper-proof effect. It is stated that the work of separating the discharge cap from the container body can be facilitated when recycling the container body made of terephthalate resin.

Japanese Patent Application Laid-Open No. 2019-151404 (Patent Document 2) discloses a discharge container having a double-structured container body, a discharge cap, and a check valve. The dispensing container further comprises a plurality of longitudinal ribs and a threaded portion. The plurality of vertical ribs are integrally provided on either one of the outer peripheral surface of the mouth portion and the inner peripheral surface of the side wall portion, and extend in the vertical direction. The threaded portion is integrally provided on either the outer peripheral surface of the mouth portion or the inner peripheral surface of the side wall portion, and bites into a plurality of vertical ribs to transfer threads to the vertical ribs, and the discharge cap is attached to the mouth portion. When the cap rotates relative to the cap, it moves along the screw and applies an upward force to the discharge cap. As a result, when the discharge cap is attached to the outer opening of the container body, the female threads are transferred to the plurality of vertical ribs by biting into the male threads. When it is rotated relative to the cap, the male threaded portion moves along the female thread, and an upward pushing force is applied to the discharge cap. That is, the male threads bite into the plurality of vertical ribs and the female threads are transferred to the inner peripheral surface of the side wall, so that the discharge cap is easily screwed to the male threads. The discharge cap can be pushed upward relative to the outer opening by rotating the screw connection relatively to the outer opening.

JP 2019-151354 A JP 2019-151404 A

A container with a cap is required to have a configuration in which the cap can be easily attached to the mouth of the container with the cap when the contents are refilled, and the cap can be easily reattached after attachment. .

Here, the technology described in Patent Documents 1 and 2 assumes a discharge container among capped containers, but the technology described in Patent Document 1 does not allow the capped discharge cap to be easily removed. Although it can be done, the plurality of cap-side threads are configured in the same manner as the plurality of mouth-side threads. Therefore, there is a problem that it is necessary to rotate the discharge cap when removing the discharge cap.

In addition, in the technique described in Patent Document 2, the vertical rib bites into the threaded portion by plugging, so that the discharge cap can be screwed to the outer opening. has a problem that it is necessary to relatively rotate in the direction to loosen the threaded connection.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a container with a cap that can be easily reattached by capping.

A container with a cap according to the present invention includes a container body, a cap, a mouth-side thread, and a cap-side thread. The container body has a mouth. The cap is made of a resin that is softer than the resin that forms the container body, has a top wall portion and a cylindrical side wall portion, and is attached to the mouth portion by plugging. The mouth portion-side thread is formed by arranging a predetermined number of threads on the outer peripheral surface of the mouth portion along the circumferential direction of the mouth portion at predetermined intervals. The cap-side thread has a larger number of threads than the mouth-side thread on the inner peripheral surface of the side wall portion of the cap, along the circumferential direction of the inner peripheral surface of the side wall portion. They are arranged side by side with an interval narrower than the interval between the threads on the mouth side and such that a multiple of the interval between the threads on the cap side becomes the interval between the threads on the mouth side. , provided at a height lower than the height of the thread of the mouth-side thread, and making the cross-sectional shape of the recess of the thread of the cap-side thread equal to the cross-sectional shape of the protrusion of the thread of the mouth-side thread and is fitted with the opening-side screw thread by the plugging.

According to the present invention, the cap can be easily reattached by tapping.

FIG. 4 is a perspective plan view showing an example of attaching a discharge cap to the mouth of the discharge container according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing an example of attaching a discharge cap to the mouth of the discharge container according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing an example of opening the cover of the discharge cap attached to the mouth of the discharge container according to the first embodiment of the present invention. Fig. 2 is a cross-sectional view showing an example of a discharge cap of the discharge container according to the first embodiment of the present invention; FIG. 5A is a side view ( FIG. 5A ) showing an example of the relationship between the mouth-side thread and the cap-side thread when the discharge cap is attached to the mouth of the discharge container according to the first embodiment of the present invention; Fig. 5B is a side view (Fig. 5B) showing an example of the relationship between the mouth-side screw thread and the cap-side screw thread when the discharge cap is attached to the container; Fig. 6A is a cross-sectional view (Fig. 6A) showing an example of a discharge container according to the first embodiment of the present invention in which the convex portion of the thread on the mouth side is properly fitted into the recessed portion of the thread on the cap side; 6A and 6B are cross-sectional views (FIG. 6B) showing an example in which the convex portion of the thread on the mouth side is slightly displaced from the recessed portion of the thread on the cap side; A side view ( FIG. 7A ) showing an example of the relationship between the mouth-side thread having a triangular cross-sectional shape and the cap-side thread, and the relationship between the mouth-side thread having a semicircular cross-sectional shape and the cap-side thread. Fig. 7B is a side view (Fig. 7B) showing an example of the relationship; FIG. 5 is a cross-sectional view showing an example of a discharge cap of a discharge container according to a second embodiment of the present invention; FIG. 9A is a side view ( FIG. 9A ) showing an example of the relationship between the mouth-side thread and the cap-side thread when the discharge cap is attached to the mouth of the discharge container according to the second embodiment of the present invention; FIG. 9B is a side view ( FIG. 9B ) showing an example of the relationship between the mouth-side screw thread and the cap-side screw thread when the discharge cap is attached to the container; A cross-sectional view ( FIG. 10A ) showing an example of a discharge container according to the second embodiment of the present invention in which the convex portion of the thread on the mouth side fits into the recessed portion of the thread on the cap side, and the mouth portion. FIG. 10B is a cross-sectional view ( FIG. 10B ) showing an example in which the convex portion of the thread on the side bites into the convex portion of the thread on the cap side; FIG. 10 is a cross-sectional view showing an example of a discharge cap of a discharge container according to a third embodiment of the present invention; FIG. 12A is a side view ( FIG. 12A ) showing an example of the relationship between the mouth-side thread and the cap-side thread when the discharge cap is attached to the mouth of the discharge container according to the third embodiment of the present invention; Fig. 12B is a side view (Fig. 12B) showing an example of the relationship between the mouth-side screw thread and the cap-side screw thread when the discharge cap is attached to the container; A cross-sectional view ( FIG. 13A ) showing an example of a discharge container according to the third embodiment of the present invention in which the convex portion of the thread on the mouth side fits into the recessed portion of the thread on the cap side, and the mouth portion. FIG. 13B is a cross-sectional view ( FIG. 13B ) showing an example of a case where the convex portion of the thread on the side bites into the convex portion of the thread on the cap side; FIG. 2 is a cross-sectional view showing an example of the cap of the capped container and the mouth portion of the container according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. It should be noted that the following embodiment is an example that embodies the present invention, and is not intended to limit the technical scope of the present invention.
<First embodiment of the present invention>

A capped container 1 according to the first embodiment of the present invention, for example, assuming a discharge container, comprises a container body 10 and a discharge cap 20 as shown in FIGS. 1 to 3. FIG. The container body 10 has a mouth portion 11, the discharge cap 20 is made of a resin softer than the resin constituting the container body 10, and has a top wall portion 22 having a discharge port 21 and a cylindrical side wall portion 23. and is attached to the opening 11 by plugging.

Here, the resin forming the container body 10 is made of polyethylene terephthalate (PET), for example, and has a predetermined strength. On the other hand, the resin forming the discharge cap 20 is, for example, polypropylene (PP) or polyethylene (PE), which is softer than the resin forming the container body 11 .

The discharge container 1 also includes a mouth side thread 12 and a cap side thread 24 . The mouth portion-side screw thread 12 has a predetermined number (eg, four) of threads 12a on the outer peripheral surface of the mouth portion 11 along the circumferential direction of the mouth portion 11 at a predetermined interval p1 (pitch) (eg, 1.5 mm). 80 mm) are arranged side by side. The height h1 of the thread 12a of the mouth-side thread 12 is set to a predetermined value (for example, 0.70 mm).

On the other hand, as shown in FIG. 4 , the cap-side screw thread 24 has a larger number (for example, twenty) of threads 24 a than the number (four) of the threads 12 a of the mouth-side thread 12 on the side wall of the discharge cap 20 . On the inner peripheral surface of the portion 23, an interval p2 (for example, 0.36 mm) narrower than the interval p1 between the threads 12a of the mouth portion side thread 12 is provided along the circumferential direction of the inner peripheral surface of the side wall portion 23, In addition, they are arranged side by side so that a multiple (for example, five times) of the spacing p2 between the threads 24a of the cap-side screw thread 24 is equal to the spacing p1 between the threads 12a of the mouth-side thread 12, and the mouth-side threads It is provided at a height h2 (for example, 0.10 mm) lower than the height h1 (for example, 0.70 mm) of the 12 threads 12a, and the cross-sectional shape of the recess of the thread 24a of the cap-side screw thread 24 is the mouth side. It is formed by making the cross-sectional shape equivalent to the convex portion of the thread 12a of the thread 12, and is fitted with the mouth-side thread 25 by plugging.

As a result, the cap (discharge cap 20 in this case) can be easily reattached by plugging. Here, reattachment means recapability.

That is, when the user plugs the side wall portion 23 of the discharge cap 20 into the mouth portion 11 of the container body 10 as shown in FIG.

Here, normally, in order to attach the discharge cap 20 to the mouth portion 11, the projection (ridge portion) of the mouth portion-side thread 12 is appropriately fitted to the recess (trough portion) of the cap-side thread 24. Therefore, it is difficult to fit the convex portion of the mouth-side screw thread 12 into the concave portion of the cap-side screw thread 24 and to attach the discharge cap 20 to the mouth portion 11 only by plugging.

Therefore, in the present invention, the number of threads 24a of the cap-side thread 24 is made larger than the number of threads 12a of the mouth-side thread 12 of the mouth 11, and the interval p2 between the threads 24a of the cap-side thread 24 is set to , the spacing p1 between the threads 12a of the mouth-side screw thread 12 is narrower than the spacing p1 between the threads 12a of the mouth-side screw thread 12, and the multiple of the spacing p2 between the threads 24a of the cap-side thread 24 is set to be the spacing p1 between the threads 12a of the mouth-side thread 12. ing. In the first embodiment of the present invention, the spacing p1 (1.80 mm) between the threads 12a of the mouth-side thread 12 is five times (0.36 mm × 5) the spacing p2 of the threads 24a of the cap-side thread 24. I'm trying to be

Further, in the present invention, the height h2 of the thread 24a of the cap-side thread 24 is made lower than the height h1 of the thread 12a of the mouth-side thread 12, and the cross section of the recess of the thread 24a of the cap-side thread 24 is The shape is the same as the cross-sectional shape of the convex portion of the thread 12a of the mouth-side screw thread 12. As shown in FIG. In the first embodiment of the present invention, the cross-sectional shape of the concave portion of the thread 24a of the cap-side thread 24 is triangular, which is equivalent to the cross-sectional shape of the convex portion of the thread 12a of the mouth-side thread 12. The angle of the cross-sectional triangular shape of the concave portion of the thread 24a of the thread 24 is set to 80 degrees, which is the same as the 80-degree angle of the cross-sectional triangular shape of the convex portion of the thread 12a of the mouth-side thread 12 .

In other words, the cap-side screw thread 24 is configured to be finer and lower than the mouth-side screw thread 12, and the projections of the threads 12a of the mouth-side screw thread 12 correspond to the threads of the cap-side thread 24. It is configured to fit properly into the recess of 24a. In such a configuration, as shown in FIG. The convex portion of the thread 12a is likely to fit into one of the numerous concave portions of the thread 24a of the cap-side screw thread 24. As shown in FIG.

As a result, as shown in FIG. 6A , it is possible to easily fit the projection of the thread 12a of the mouth-side thread 12 into the recess of the thread 24a of the cap-side thread 24 by plugging. Also, as shown in FIG. 6B, even if the convex portion of the thread 12a of the mouth-side thread 12 is slightly displaced from the recessed portion of the thread 24a of the cap-side thread 24 due to the plugging, the adjacent recessed portion can be positioned. Fitting becomes easier, and the cap-side thread 24 can easily be fitted with the mouth-side thread 12 .

In addition, by making the resin forming the discharge cap 20 softer than the resin forming the container body 10, the projections of the threads 12a of the mouth-side thread 12 correspond to the recesses of the threads 24a of the cap-side thread 24. Even if the projection does not fit exactly into the recess, the projection is fitted into the recess by deforming the recess to some extent due to the hardness of the projection. This makes it possible to simply fit the mouth-side thread 12 to the cap-side thread 24 by plugging.

Furthermore, by making the threads 24a of the cap-side screw thread 24 finer than the threads 12a of the mouth-side thread 12, it is possible to prevent the discharge cap 20 from rattling after the discharge cap 20 is attached to the mouth part 11. I can.

By configuring the threads 24a of the cap-side thread 24 to be lower than the threads 12a of the mouth-side thread 12, the moldability when molding the discharge cap 20 is improved, and the metal for the discharge cap 20 is increased. It is possible to simplify the structure of the mold and reduce the manufacturing cost of the mold.

Here, when the discharge cap 20 is attached to the mouth portion 11, the cross-sectional shape of the concave portion of the thread 24a of the cap-side screw thread 24 should be the same as the cross-sectional shape of the convex portion of the thread 12a of the mouth-side screw thread 12. Then, the convex portion of the thread 12a of the mouth-side thread 12 comes into close contact with the recessed portion of the thread 24a of the cap-side thread 24. As shown in FIG. Due to this contact, a frictional force acts, and the ejection cap 20 can be attached to the mouth portion 11 after having a certain degree of attachment strength. Even if the contents of the container body 10 are, for example, carbonated water or the like, and pressure is applied from the inside of the container body 10 to the outside, the protrusions of the threads 12a of the mouth-side screw threads 12 are not capped. The snug contact with the recesses of the threads 24a of the side threads 24 allows the dispensing cap 20 to remain attached to the mouth portion 11 against the pressure of the contents. Further, even if the container main body 10 is transported with the contents stored therein and a predetermined force is applied to the discharge cap 20 from the outside, the convex portion of the thread 12a of the mouth portion-side thread 12 will not remain in the cap-side thread. By abutting tightly against the recesses of the ridges 24a of 24, it is possible to prevent a situation in which the discharge cap 20 suddenly comes off from the mouth portion 11.例文帳に追加

On the other hand, the convex portion of the thread 12a of the mouth-side thread 12 is partially fitted into the recessed portion of the thread 24a of the cap-side thread 24, and the mouth-side thread 12 is not fitted into the cap-side thread 24. There is a clearance (gap) in which nothing is attached. Therefore, when the discharge cap 20 is removed from the mouth portion 11, there is a clearance above and below a portion of the cap side thread 24 in which a portion of the mouth portion side thread 12 is fitted. There is a space where a part moves up and down. Further, since the height h2 of the threads 24a of the cap-side thread 24 is lower than the height h1 of the threads 12a of the mouth-side thread 12, the projections of the threads 12a of the mouth-side thread 12 are located on the cap side. It abuts on the concave portion of the thread 24a of the screw thread 24 at a shallow position and in a narrow range. As a result, by rotating the discharge cap 20 with respect to the mouth portion 11 with a relatively weak force, the projection of the thread 12a of the mouth-side thread 12 can be easily removed from the recess of the thread 24a of the cap-side thread 24. This makes it possible to easily remove the discharge cap 20 from the mouth portion 11 . Therefore, for example, when the contents of the container body 10 are refilled, the discharge cap 20 can be easily removed, the contents can be filled into the container body 10, and the discharge cap 20 can be attached immediately. As a result, in the present invention, for example, compared to conventional dispensing caps in which the number of threads 12a of the mouth side threads 12 is close to the number of threads 24a of the cap side threads 24, the present invention can be rotated with a given force. It is possible to remarkably improve the recapping property of the discharge cap 20, which can be easily removed and easily attached by plugging.

Here, there is no particular limitation on the rotational direction of tightening of the mouth-side screw thread 12, but for example, as shown in FIGS. It may be a right-handed rotation direction, or a left-handed rotation direction that advances downward when turned counterclockwise (counterclockwise) in a plan view.

On the other hand, there is no particular limitation on the direction of rotation for tightening the cap-side screw thread 24, but for example, as shown in FIGS. It is preferable to be configured in the same direction as the direction of rotation of tightening.

Further, the lead angle α1 of the mouth-side screw thread 12 is not particularly limited, but is preferably in the range of 1 to 15 degrees as shown in FIGS. 5A and 5B. It is more preferable if it is within the range.

On the other hand, the lead angle α2 of the cap-side thread 24 is not particularly limited. For example, as shown in FIGS. 5A and 5B, the lead angle α2 of the cap-side thread 24 is equal to the lead angle α1 is preferably equivalent to

Here, in the first embodiment of the present invention, the tightening rotation direction of the cap-side screw thread 24 is the same as the tightening rotation direction of the mouth-side screw thread 12, and the cap-side screw thread 24 is tightened in the same direction. The lead angle α2 is made equivalent to the lead angle α1 of the mouth-side thread 12 .

In this case, when the discharge cap 20 is attached to the mouth portion 11, as shown in FIG. 5A and FIG. fit. Therefore, it becomes possible to easily fit the mouth-side thread 12 to the cap-side thread 24 by plugging, and the fitting of the mouth-side thread 12 to the cap-side thread 24 is reinforced so that the discharge can be performed. It is possible to firmly fix the cap 20 to the mouth portion 11 .

By the way, the discharge container 1 may further include the mouth side contact portion 13 and the cap side contact portion 25 .

The mouth-side contact portion 13 is provided below the outer peripheral surface of the mouth portion 11 and protrudes outward, and the cap-side contact portion 25 is provided below the inner peripheral surface of the side wall portion 23 of the discharge cap 20 . and protrudes inward.

As a result, the cap-side abutting portion 25 abuts against the mouth-side abutting portion 13 when the cap is driven, thereby preventing the ejection cap 20 from being pushed too far into the mouth portion 11 and temporarily preventing the cap-side abutment. When the contact portion 25 gets over the mouth side contact portion 13, a popping sound can be generated. Therefore, the wearer who puts the discharge cap 20 on the mouth portion 11 can easily recognize that the discharge cap 20 has been put on the mouth portion 11 (or recapped) by hearing this sound.

Here, the configuration of the mouth-side contact portion 13 is not particularly limited. Moreover, the height of the mouth-side contact portion 13 is not particularly limited, and may be a height that allows contact with the cap-side contact portion 25 . Furthermore, the cross-sectional shape of the mouth-side contact portion 13 is not particularly limited, and may be convex, semicircular, or polygonal. The configuration of the cap-side contact portion 25 is not particularly limited, and the same configuration, height, and cross-sectional shape as those of the mouth-side contact portion 13 can be used.

Moreover, the discharge container 1 may further include a seal tubular portion 26 . The cylindrical seal portion 26 is provided in a cylindrical shape on the lower surface of the top wall portion 23 and comes into contact with the inner peripheral surface of the mouth portion 11 by plugging.

As a result, the cap-side screw thread 24 is fitted to the mouth-side screw thread 12 of the mouth portion 11 on the outside, and the seal tube portion 26 contacts the mouth portion 11 on the inside. Fixing of the ejection cap 20 can be further strengthened.

Here, in the first embodiment, the number of threads 12a of the mouth-side thread 12 is four, the mouth-side thread 12 is a four-start thread, and the number of threads 24a of the cap-side thread 24 is twenty. Although the cap-side thread 24 is a 20-start thread, there is no particular limitation as long as the number of threads 24a of the cap-side thread 24 is greater than the number of threads 12a of the mouth-side thread 12.

For example, the number of threads 12a of the mouth-side thread 12 is set to four, the number of threads 12a of the mouth-side thread 12 is set to four threads, the number of threads 24a of the cap-side thread 24 is set to ten, and the cap-side thread 24 is A ten-thread screw may also be used. Further, the number of threads 12a of the mouth-side thread 12 is set to two, the number of threads 24a of the cap-side thread 24 is set to 20, and the number of threads 24a of the cap-side thread 24 is set to 20. may be a 20-start thread, or the number of threads 24a of the cap-side thread 24 may be set to ten and the cap-side thread 24 may be a 10-start thread.

Here, for example, the number of threads 24a of the cap-side thread 24 is preferably within a range of 2 to 10 times the number of threads 12a of the mouth-side thread 12. More preferably, it is in the range of 3 to 9 times the number of 12a. As a result, the cap-side thread 24 becomes finer, making it easier to fit the convex portion of the thread 12a of the mouth-side thread 12 into the recess of the thread 24a of the cap-side thread 24, and the mouth-side thread. The concave portion of the thread 24a of the cap-side thread 24, which is not fitted with the convex portion of the twelve threads 12a, is provided as a clearance to facilitate removal of the discharge cap 20. FIG.

In the first embodiment, the interval p1 between the threads 12a of the mouth-side screw thread 12 is set to be five times the interval p2 between the threads 24a of the cap-side screw thread 24. There are no restrictions. For example, as shown in FIG. 7A, the spacing p1 between the threads 12a of the mouth-side thread 12 may be seven times the spacing p2 between the threads 24a of the cap-side thread 24, or as shown in FIG. 7B. As shown, the spacing p1 between the threads 12a of the mouth-side thread 12 may be three times the spacing p2 between the threads 24a of the cap-side thread 24. A multiple of the space p2 between the threads 24a of the cap-side screw thread 24 is appropriately designed.

In the first embodiment, the angle of the triangular cross-sectional recess of the thread 24a of the cap-side thread 24 is equal to the angle of 80 degrees of the triangular cross-sectional angle of the protrusion of the thread 12a of the mouth-side thread 12. is set to 80 degrees, but there is no particular limitation on this angle. For example, as shown in FIG. 7A, the angle β2 of the concave portion of the triangular cross-section of the thread 24a of the cap-side screw thread 24 is set to 60 degrees of the angle β1 of the triangular cross-sectional shape of the convex portion of the thread 12a of the mouth-side screw thread 12. You may set to 60 degrees equivalent to . The angle β2 of the triangular cross-sectional recess of the thread 24a of the cap-side screw thread 24 is, for example, preferably within the range of 40 degrees to 120 degrees, and more preferably within the range of 50 degrees to 100 degrees.

In addition, in the first embodiment, the cross-sectional shape of the concave portion of the thread 24a of the cap-side screw thread 24 was made triangular, which is equivalent to the cross-sectional shape of the convex portion of the thread 12a of the mouth-side screw thread 12. is not particularly limited. For example, as shown in FIG. 7B, the cross-sectional shape of the concave portion of the thread 24a of the cap-side thread 24 may be a semicircular shape equivalent to the cross-sectional shape of the convex portion of the thread 12a of the mouth-side thread 12. Other shapes include, for example, a semi-elliptical shape, a rectangular shape, a trapezoidal shape, and a polygonal shape. There is no particular limitation as long as the cross-sectional shape of the protrusion of the thread 12a of the mouth-side thread 12 fits the cross-sectional shape of the recess of the thread 24a of the cap-side thread 24. FIG.

Further, in the first embodiment, the spacing p1 between the threads 12a of the mouth-side thread 12 is set to 1.80 mm, the spacing p2 between the threads 24a of the cap-side thread 24 is set to 0.36 mm, and the cap-side thread 24 is The spacing p1 between the threads 12a of the mouth-side screw thread 12 is set to be five times the spacing p2 between the threads 24a, but the spacings p1 and p2 are not particularly limited. For example, the interval p1 between the threads 12a of the mouth-side thread 12 is preferably within the range of 1.00 mm to 2.50 mm, more preferably within the range of 1.50 mm to 2.20 mm. Also, the interval p2 between the threads 24a of the cap-side thread 24 is preferably within the range of 0.10 mm to 0.60 mm, more preferably within the range of 0.20 mm to 0.50 mm.

Further, there is no particular limitation on the multiple of the spacing p2 of the threads 24a of the cap-side thread 24 with respect to the spacing p1 of the threads 12a of the mouth-side thread 12 . This multiple means, for example, the interval between the recesses of the threads 24a of the cap-side thread 24 into which the protrusions of the threads 12a of the mouth-side screw thread 12 are fitted. When the convex portion of the thread 12a on the upper end fits into the concave portion of the thread 24a near the upper end of the cap-side thread 24, the convex portion of the thread 12a next to the thread 12 on the cap side fits the thread 24a on the cap side. It means that it fits into the concave portion of the fifth row 24a downward from the row 24a near the upper end of the row 24a. This multiple is preferably in the range of 3 to 10 times the spacing p2 between the threads 24a of the cap-side thread 24, and within the range of 4 to 6 times the spacing p2 between the threads 24a of the cap-side thread 24. It is preferable to have This makes it possible to easily fit the projection of the thread 12 a of the mouth-side thread 12 into the recess of the thread 24 a of the cap-side thread 24 .

In the first embodiment, the height h1 of the thread 12a of the mouth-side thread 12 was set to 0.70 mm, and the height h2 of the thread 24a of the cap-side thread 24 was set to 0.10 mm. As long as the height h2 of the thread 24a of the thread 24 is lower than the height h1 of the thread 12a of the mouth-side thread 12, there is no particular limitation. For example, the height h1 of the thread 12a of the mouth-side screw thread 12 is preferably within the range of 0.40 mm to 1.50 mm, more preferably within the range of 0.50 mm to 1.00 mm. Also, the height h2 of the thread 24a of the cap-side thread 24 is preferably within the range of 0.05 mm to 0.30 mm, more preferably within the range of 0.05 mm to 0.20 mm.

Here, the multiple of the height h2 of the thread 24a of the cap-side thread 24 with respect to the height h1 of the thread 12a of the mouth-side thread 12 is not particularly limited. The height h1 is preferably in the range of 3 to 12 times the height h2 of the thread 24a of the cap-side thread 24, and 5 to 9 times the height h2 of the thread 24a of the cap-side thread 24. It is preferable that it is within the range. As a result, the cap-side thread 24 becomes lower, making it easier to fit the projection of the thread 12 a of the mouth-side thread 12 into the recess of the thread 24 a of the cap-side thread 24 .

By the way, the structure of the container body 10 is not particularly limited.

Although there is no particular limitation on the configuration of the discharge cap 20, for example, as shown in FIGS. A formed lid body 27 may be provided, and the lid body 27 may be connected to the discharge cap 20 via a hinge 28 at a portion of the outer peripheral surface of the lid body 27 so as to be openable and closable.

In addition, a cylindrical stopper portion 29 is provided on the lower surface of the top wall portion of the lid 27, and when the lid 27 is closed with respect to the discharge cap 20, the stopper portion 29 of the lid portion 27 is closed to the discharge cap 20. It may be attached to the inner peripheral surface of the discharge port 21 of the top wall portion 22 to close the discharge port 21 .

Here, the configuration of the discharge port 21 is not particularly limited, but for example, as shown in FIGS. It is formed in a curved tubular shape and formed in a tubular shape downward from the top wall portion 22 , so that it is configured in a cylindrical shape passing through the top wall portion 22 . The shape and size of the discharge port 21 are appropriately changed in design according to the contents contained in the discharge container 1 and the application.

A cylindrical projection 30 is provided on the lower surface of the top wall of the lid 27 to cover the outer side of the plug 29. When the lid 27 is closed with respect to the discharge cap 20, the plug 29 opens to the discharge port. 21 , and the cylindrical projection 30 may come into contact with the outer peripheral surface of the discharge port 21 .

A locking portion 31 projecting outward is provided on the inner surface of the side wall portion of the lid body 27 at a position facing the hinge 28 , and the top wall portion 22 of the discharge cap 20 is provided at a position facing the hinge 28 . A recessed groove 32 is provided on the outer surface of the discharge cap 20, and when the lid 27 is closed, the locking portion 31 faces and engages with the groove 32, thereby allowing the lid 27 to close to the discharge cap 20. It may be maintained in a closed state covering the top wall portion 22 .

Further, a hook portion 33 projecting outward may be provided on the outer surface of the side wall portion of the lid body 27 at a position facing the locking portion 31 . As a result, the user hooks a finger on the hook 33 and pulls it upward to remove the locking portion 31 of the lid body 27 from the groove portion 32 of the discharge cap 20 , thereby opening the lid body 27 from the discharge cap 20 . state can be made.

A neck ring 14 is provided below the mouth portion side contact portion 13 of the mouth portion 11 so as to protrude outward in an annular shape over the entire circumference of the mouth portion 11 . This makes it possible to confirm the position of the lower end of the mouth portion 11 using the neck ring 14 as a mark.

<Second embodiment of the present invention>
Now, in the first embodiment of the present invention, the tightening rotational direction of the cap-side thread 24 is the same as the tightening rotational direction of the mouth-side thread 12, and the lead angle of the cap-side thread 24 is Although α2 is made equal to the lead angle α1 of the mouth-side screw thread 12, this is not restrictive, and other configurations may be used.

For example, in the second embodiment of the present invention, as shown in FIGS. 8, 9A, and 9B, the tightening rotation direction of the cap-side screw thread 24 is opposite to the tightening rotation direction of the mouth-side screw thread 12. In addition, the lead angle α2 of the cap-side thread 24 may be made equal to the lead angle α1 of the mouth-side thread 12 .

In this case, as shown in FIG. 9A, when the discharge cap 20 is attached to the mouth portion 11 by plugging, as shown in FIG. 24 fits across the recesses of the ridges 24a.

Therefore, as shown in FIG. 10A, in the cross-section at a predetermined position, the projection of the thread 12a of the mouth-side thread 12 fits into the recess of the thread 24a of the cap-side thread 24, but as shown in FIG. Furthermore, in the cross section at the other position, the protrusion of the thread 12a of the mouth-side thread 12 does not fit into the recess of the thread 24a of the cap-side thread 24, and the protrusion of the thread 24a of the cap-side thread 24 does not fit. will eat into.

Here, since the resin constituting the discharge cap 20 is made softer than the resin constituting the container body 10, the protrusions of the threads 24a of the cap-side screw threads 24 and the protrusions of the threads 12a of the mouth-side threads 12 are aligned with each other. is transferred as the transfer portion 24b.

As a result, even if the convex portion of the thread 12a of the mouth-side screw thread 12 is slightly displaced from the concave portion of the thread 24a of the cap-side thread 24 due to the plugging, the convex portion of the thread 12a of the mouth-side thread 12 is However, by crossing and fitting the concave portion of the thread 24a of the cap-side thread 24, a transfer portion 24b is formed on the convex portion of the thread 24a of the cap-side thread 24, and the mouth-side thread 12 is fitted to the cap-side thread. 24 as a whole can be easily fitted. Furthermore, due to the formation of the transfer portion 24b, the convex portion of the thread 12a of the mouth-side screw thread 12 is fitted into the concave portion of the thread 24a of the cap-side screw thread 24 and the transfer portion 24b. The fitting of the side screw thread 12 is reinforced, and the discharge cap 20 can be firmly fixed to the mouth portion 11 .

On the other hand, when the discharge cap 20 is removed from the mouth portion 11, the convex portion of the thread 12a of the mouth portion-side thread 12 is partially fitted into the recessed portion of the thread 24a of the cap-side thread 24 in the same manner as described above. In addition, since there is a clearance in the cap-side screw thread 24, by rotating the discharge cap 20 with respect to the mouth portion 11 with a relatively weak force, the convex portion of the thread 12a of the mouth-side screw thread 12 is removed. It is possible to easily remove the thread 24a of the cap-side thread 24 from the recess.

Further, since the tightening rotation direction of the cap-side screw thread 24 is set in the opposite direction to the tightening rotation direction of the mouth-side screw thread 12, even if the discharge cap 20 is rotated in the tightening rotation direction, the tightening will not occur. Even if it is rotated in a direction opposite to the direction of rotation of , the abutment (fitting) between the convex portion of the thread 12a of the mouth-side thread 12 and the recessed portion of the thread 24a of the cap-side thread 24 can be released. It is possible to easily remove the discharge cap 20 by rotating it in any direction.

Here, next, when the discharge cap 20 is attached to the mouth portion 11 by plugging, the transfer portion 24b is formed once, so that the convex portion of the thread 12a of the mouth portion side screw thread 12 is positioned on the cap side. Since it is easily fitted into the concave portion of the thread 24a of the thread 24 and the transfer portion 24b, the recapping property of the discharge cap 20 can be improved.

<Third embodiment of the present invention>
In the second embodiment of the present invention, the tightening rotational direction of the cap-side thread 24 is opposite to the tightening rotational direction of the mouth-side thread 12, and the lead angle α2 of the cap-side thread 24 is set to , and the lead angle α1 of the mouth-side screw thread 12, but the present invention is not limited to this, and other configurations may be used.

For example, in the third embodiment of the present invention, as shown in FIGS. 11, 12A, and 12B, the thread 24a of the cap-side screw thread 24 is annular, and the lead angle of the cap-side screw thread 24 is α2 may be set to 0 degree. Here, when the thread 24a of the cap-side screw thread 24 is configured in an annular shape, the cap-side screw thread 24 is tightened in no rotational direction.

In this case, as shown in FIG. 12A, when the discharge cap 20 is attached to the mouth portion 11 by plugging, as shown in FIG. 24 fits across the recesses of the ridges 24a.

Therefore, as shown in FIG. 13A, in a cross-section at a predetermined position, the projections of the threads 12a of the mouth-side thread 12 fit into the recesses of the threads 24a of the cap-side thread 24, but as shown in FIG. In addition, in the cross section at the other position, the convex portion of the thread 12a of the mouth-side thread 12 bites into the convex portion of the thread 24a of the cap-side thread 24. As shown in FIG.

Then, as in the second embodiment, the convex portion of the thread 12a of the mouth-side thread 12 is transferred to the convex portion of the thread 24a of the cap-side thread 24 as a transfer portion 24b.

As a result, even if the convex portion of the thread 12a of the mouth-side screw thread 12 is slightly displaced from the concave portion of the thread 24a of the cap-side thread 24 due to the plugging, the convex portion of the thread 12a of the mouth-side thread 12 is However, by crossing and fitting the concave portion of the thread 24a of the cap-side thread 24, a transfer portion 24b is formed on the convex portion of the thread 24a of the cap-side thread 24, and the mouth-side thread 12 is fitted to the cap-side thread. 24 as a whole can be easily fitted. Further, as in the second embodiment, by forming the transfer portion 24b, the convex portion of the thread 12a of the mouth-side screw thread 12 is fitted into the concave portion of the thread 24a of the cap-side screw thread 24 and the transfer portion 24b. , the fitting of the mouth portion side thread 12 to the cap side thread 24 is reinforced, and the discharge cap 20 can be firmly fixed to the mouth portion 11 .

On the other hand, when the discharge cap 20 is removed from the mouth portion 11, the convex portion of the thread 12a of the mouth portion-side thread 12 is partially fitted into the recessed portion of the thread 24a of the cap-side thread 24 in the same manner as described above. In addition, since there is a clearance in the cap-side screw thread 24, by rotating the discharge cap 20 with respect to the mouth portion 11 with a relatively weak force, the convex portion of the thread 12a of the mouth-side screw thread 12 is removed. It is possible to easily remove the thread 24a of the cap-side thread 24 from the recess.

Further, since the thread 24a of the cap-side screw thread 24 is formed in an annular shape and the lead angle α2 of the cap-side screw thread 24 is set to 0 degrees, the discharge cap can be adjusted as in the second embodiment. 20 is rotated in the direction of rotation for tightening or in the direction opposite to the direction of rotation for tightening, the convex portion of the thread 12a of the mouth-side thread 12 and the recessed portion of the thread 24a of the cap-side thread 24 The abutment (fitting) can be released, and the ejection cap 20 can be easily removed by rotating it in any direction.

Next, when the discharge cap 20 is attached to the mouth portion 11 by plugging, the transfer portion 24b is once formed so that the convex portion of the thread 12a of the mouth portion side screw thread 12 becomes the cap side thread. Since it can be easily fitted into the concave portion of the ridge 24a of the ridge 24 and the transfer portion 24b, the recapping property of the ejection cap 20 can be improved in the same manner as described above.

In the first to third embodiments described above, the discharge container 1 having the discharge cap 20 attached to the mouth portion 11 is assumed, but as described above, the features of the present invention are: Since it is the cap-side thread 24, it can be applied not only to the discharge container 1, but also to the container 1 with a simple cap attached to the mouth.

For example, as shown in FIG. 14, the container body 10 has a mouth portion 11, the cap 20 is made of a resin that is softer than the resin that constitutes the container body 10, a top wall portion 22, and a cylindrical It has a side wall portion 23 and is attached to the mouth portion 11 by plugging. Here, the ejection port 21 does not exist in the top wall portion 22 . In addition, the capped container 1 has a mouth side thread 12, a cap side thread 24, a mouth side contact portion 13, a neck ring 14, and a cap side contact portion 25 in the same manner as described above. , and a seal tube portion 26 . Even with such a configuration, it is possible to obtain the same effect as the present invention.

INDUSTRIAL APPLICABILITY As described above, the capped container according to the present invention is useful as a capped container containing liquid contents such as food seasonings, medicines, cosmetics, shampoos, rinses, and liquid soaps. It is effective as a capped container that can be easily attached and that can be reattached by removing the cap.

Reference Signs List 1 Discharge container 10 Container body 11 Mouth 12 Mouth side thread 20 Discharge cap 21 Discharge port 22 Top wall 23 Side wall 24 Cap side thread

Claims (4)

a container body having a mouth;
a cap that is made of a resin that is softer than the resin that forms the container body, has a top wall portion and a cylindrical side wall portion, and is attached to the mouth portion by plugging;
a mouth-side screw thread formed by arranging a predetermined number of threads on the outer peripheral surface of the mouth along the circumferential direction of the mouth at predetermined intervals;
The number of threads larger than the number of threads of the mouth-side screw thread is formed on the inner peripheral surface of the side wall of the cap along the circumferential direction of the inner peripheral surface of the side wall. are arranged side by side with an interval narrower than the interval between the threads, and such that a multiple of the interval between the threads of the cap-side thread is equal to the interval between the threads of the mouth-side thread, and the mouth-side screw It is provided at a height lower than the height of the thread, and is formed by making the cross-sectional shape of the recess of the thread of the cap-side thread equal to the cross-sectional shape of the protrusion of the thread of the mouth-side thread, a cap-side thread that is fitted with the mouth-side thread by the plugging;
A capped container comprising a The direction of rotation of tightening of the cap-side thread is the same as the direction of rotation of tightening of the mouth-side thread,
The lead angle of the cap-side thread is equal to the lead angle of the mouth-side thread,
The capped container according to claim 1. The direction of rotation of tightening of the cap-side thread is opposite to the direction of rotation of tightening of the mouth-side thread,
The lead angle of the cap-side thread is equal to the lead angle of the mouth-side thread,
The capped container according to claim 1. The thread on the cap side is formed in an annular shape,
The lead angle of the cap-side thread is 0 degrees,
The capped container according to claim 1.

Images