JP6985000B2 - Sealed structure and packaging container - Google Patents

Description

The present invention relates to a sealed structure and a packaging container, and more particularly to a sealed structure and a packaging container configured such that a spout is sealed by screwing a cap.

Packaging containers that contain fluid contents and maintain a tight seal by screwing a cap into the spout are widely used. A packaging container having such a hermeticity is useful because it makes it possible to easily extend the storage period of contents that cannot be used up at one time.

In Patent Document 1, the container body is formed with a body portion and an external thread which is a double-threaded screw, and a shoulder connecting a tubular side wall constituting a spout, a lower end of the side wall, and a body portion of the container body. The cap comprises a portion and at least two protrusions formed near the lower end of the side wall of the shoulder portion, and the cap has a tubular threaded portion formed with an internal thread to be screwed with an external thread and a threaded portion. On the top surface portion connected to one end of the top surface portion, the side surface portion connected to the outer periphery of the top surface portion, and the outer surface of the screwed portion, a surface including the other end of the screwed portion is partially projected and screwed. A packaging container is disclosed that sometimes comprises at least two claws that overcome any of at least two protrusions.

Japanese Unexamined Patent Publication No. 2014-024561

According to the packaging container of Patent Document 1, a packaging container that prevents inadvertent opening, is easy to open and close, can maintain high airtightness, and reduces cap screwing defects during production. It is said that it can be provided. However, in order to obtain such an effect in the packaging container of Patent Document 1, the claw of the cap gets over the protrusion of the container body in a state where the internal screw of the cap is completely screwed into the external screw of the container body. It is necessary to perform strict alignment so that it will be in the state of being in a state of being. Therefore, the packaging container of Patent Document 1 has a high degree of difficulty in design, and in reality, an error occurs and it is difficult to manufacture it accurately.

Further, according to the packaging container of Patent Document 1, when the closing is completed, a certain resistance feeling and a subsequent "click" feeling are transmitted to the user's fingers, so that the closing feeling is preferably obtained and the closing is surely performed. It is said that it can be done. However, in the packaging container of Patent Document 1, the sensation that is transmitted to the user's finger when the closing is completed ends in an instant, so that the signal of the closing completion may be missed. Therefore, in the packaging container of Patent Document 1, it is not known whether or not the cap is properly closed, and the cap is loosely tightened and the contents are spilled. There is an increased possibility that the cap will be cracked or damaged.

Therefore, an object of the present invention is to provide a sealed structure and a packaging container which can be easily and surely realized in an appropriate closed state and can be easily manufactured.

In order to solve the above problems, the present invention is a sealed structure including a cylinder that defines a spout and a cap portion that seals the spout, and has a diameter from the cylinder on which the first screw is formed. The eclipsed cylinder of the cap portion in which the uneven portion in which the radial unevenness is repeated in the circumferential direction and the second screw that meshes with the first screw are formed on the outer peripheral surface of the pedestal portion protruding outward in the direction. Further outside in the radial direction, the projecting piece is provided with a protruding piece that fits into the concave portion of the uneven portion and is configured to get over the convex portion in response to the rotation of the cap portion with respect to the tubular body. wherein Ri tabular der projecting below the axially from the side of the top of the closed top cylinder, said cap portion extends below the axial direction between the closed top tubular member and the protruding pieces a gap, an upper portion of the projecting piece is fixed to the side of the closed top cylinder, the lower end of the protruding piece becomes free, the projecting piece of Rukoto formed along the closed top cylinder It is a feature.

Further, when the degree of engagement between the first screw and the second screw is larger, the protruding piece is configured so that the contact surface with the convex portion becomes large, and the protruding piece is the concave portion. It is configured to generate a sound when it gets stuck and gets over the convex portion, and the number of the sounds generated from the fully open state to the fully closed state of the cap portion with respect to the tubular body is at least. 5 is configured to be characterized Rukoto.

Further, the convex portion is arranged uniformly in the circumferential direction on the outer peripheral surface, the number of the convex portions is 30 or more, characterized in that it is composed of 60 or less.

Further, the convex portion has a pitch of 0.6 mm or more and 4.0 mm or less.

Further, it is characterized in that the number of the protruding pieces is composed of a plurality of pieces.

Further, the protruding piece is characterized in that the overlapping width in the radial direction with the convex portion when fitted into the concave portion is 0.5 mm or less.

Further, the packaging container according to the present invention is characterized in that a sealed structure having the above-mentioned structure is used.

According to the present invention, it is a sealing structure including a cylinder that defines a spout and a cap portion that seals the spout, and protrudes outward in the radial direction from the cylinder in which the first screw is formed. An uneven portion on the outer peripheral surface of the pedestal portion in which radial irregularities are repeated in the circumferential direction, and an uneven portion on the outer side in the radial direction from the ridged cylinder of the cap portion in which the second screw that meshes with the first screw is formed. under fitted in the recess, and a configured protruding pieces to get over the protrusion in response to rotation of the cap portion relative to the cylindrical body, butt piece is from the side of the top of the closed top cylinder in the axial direction tabular der projecting side is, the cap portion has a gap extending below the axial direction between the projecting piece and Yuitadaki cylinder, the upper portion of the projecting piece on the side of the closed top cylinder fixed, the lower end of the protruding piece becomes free, the projecting piece Runode formed along the closed top cylinder, appropriate plugging state easily and securely achieved, manufacture provides easy sealing structure be able to.

Further, since the packaging container according to the present invention uses a sealed structure having the above-mentioned configuration, it is possible to provide a packaging container that can be easily and surely realized in an appropriate closed state and is easy to manufacture.

It is one side sectional view which showed the front surface of the tube container as an example of the packaging container which concerns on this embodiment. It is a front view which showed a part of the container body. It is a top view of the container body. It is a bottom view of a cap part. It is a vertical sectional view of a sealed structure. It is a top view of the container body which concerns on the modification. It is a bottom view of the cap part which concerns on the modification. It is a bottom view of the cap part which concerns on other modification. It is a bottom view of the cap part which concerns on still another modification.

Hereinafter, the details of the embodiment of the present invention will be described with reference to the drawings. First, the packaging container according to the present embodiment will be described in detail. FIG. 1 is a one-sided cross-sectional view showing the front surface of a tube container 100 as an example of a packaging container according to the present embodiment. Here, for convenience of explanation, the side having the opening for pouring out the contents contained in the tube container 100 is referred to as the upper side. Then, in FIG. 1, the right side of the center line of symmetry of the tube container 100 is shown in a cross-sectional view.

As shown in FIG. 1, the tube container 100 has a container body 10 and a cap portion 30. The container body 10 has a body portion 11 and a cylinder body 20. The body portion 11 is formed in a tubular shape and accommodates the contents. The cylinder 20 defines the spout 21 of the container body 10. As illustrated in FIG. 1, the body portion 11 and the cylinder portion 20 are connected by a frustum-shaped shoulder portion 12 whose length decreases in the radial direction toward the upper side in the axial direction of the tube container 100. Just do it. On the other hand, the cap portion 30 has a hump cylinder 31 that seals the spout 21 corresponding to the cylinder 20. As illustrated in FIG. 1, the cap portion 30 may have a hump cylinder-shaped outer cylinder 32 on the radial outer side of the ridge cylinder 31. The sealed structure 50 is configured by the combination of the tubular body 20 and the cap portion 30 having the ridged tubular body 31.

Next, the sealed structure 50 according to the present embodiment will be described in detail. FIG. 2 is a front view showing a part of the container body 10. A first screw is formed on the cylinder 20. On the outer peripheral surface of the tubular body 20 illustrated in FIG. 2 and the like, a screw 22 having one screw thread is formed. The first screw may be a double-threaded screw or a multi-threaded screw instead of a single-threaded screw. Further, since the first screw is formed on the inner peripheral surface of the tubular body 20 instead of the male screw 22, it can be used as a screw. In the horizontal cross section, the tubular body 20 does not have to be circular as long as the thread of the first screw is circular.

The tubular body 20 has a pedestal portion 23 that is connected to the shoulder portion 12 and projects outward in the radial direction. The pedestal portion 23 has a flat upper surface and is formed in an annular shape coaxial with the male screw 22. An uneven portion 24 is provided on the outer peripheral surface of the pedestal portion 23 so that the unevenness in the radial direction is repeated in the circumferential direction.

FIG. 3 is a plan view of the container body 10. The uneven portion 24 is composed of a concave portion 25 and a convex portion 26. The convex portion 26 exemplified in FIG. 3 is formed into a substantially triangular shape in a plan view. The convex portions 26 may be arranged evenly in the circumferential direction at a predetermined pitch P. The tubular body 20 of the container body 10 exemplified in FIG. 3 is provided with 45 recesses 25 and 45 convex portions 26, respectively. Therefore, the convex portion 26 exemplified in FIG. 3 is formed with a central angle of 8 ° with respect to the radial center of the pedestal portion 23. The convex portion 26 may be formed with a punching taper for removing from the mold at the time of molding.

FIG. 4 is a bottom view of the cap portion 30. A second screw that meshes with the first screw is formed on the ridged cylinder 31 of the cap portion 30. The ridged cylinder 31 illustrated in FIG. 4 and the like has a single-threaded screw and a screw 33 formed on the inner peripheral surface thereof. Further, an annular contact ring 34 is formed on the inner circumference of the female screw 33 so as to project axially from the lower surface of the top of the ridged cylinder 31. The contact ring 34 corresponds to the tubular body 20 of the container body 10, and the tube container 100 can be sealed by being in close contact with the tubular body 20. Further, the cap portion 30 is provided with a protruding piece 35 on the outer side in the radial direction from the ridged cylinder 31. As illustrated in FIGS. 1 and 4, the protruding piece 35 is formed in a flat plate shape protruding downward in the axial direction from the top side of the ridged cylinder 31.

The protruding piece 35 is required to be deformable on the side of the protruding end. Therefore, the protruding piece 35 is formed with a wall thickness sufficient to be deformed. Since the projecting piece 35 is provided so as to extend in the axial direction, the projecting piece 35 may be formed so as to be formed along the ridged cylinder 31 so as to be easily deformed as a thin wall and to maintain its strength. can.

FIG. 5 is a vertical cross-sectional view of the sealed structure 50. FIG. 5 shows a sealed state in which the cap portion 30 is completely closed (fully closed) with respect to the tubular body 20. In the fully closed sealed structure 50, the cylinder 20 and the contact ring 34 are in close contact with each other, and the spout 21 is blocked by the ridged cylinder 31.

The protruding piece 35 is configured to fit into the concave portion 25 of the concave-convex portion 24 and to get over the convex portion 26 in response to the rotation of the cap portion 30 with respect to the tubular body 20. The projecting piece 35 is arranged so that the locus drawn when rotating with respect to the tubular body 20 overlaps with the convex portion 26. In the projecting piece 35 illustrated in FIG. 5 and the like, a part of the inner peripheral side in the vicinity of the lower end thereof is inserted between the adjacent convex portions 26. Then, the projecting piece 35 is configured to be deformable when it rotates with respect to the tubular body 20 and hits the convex portion 26, so that the convex portion 26 can be overcome.

The projecting piece 35 is configured to generate a sound each time it gets over the convex portion 26. Since the outer peripheral surface of the pedestal portion 23 is provided with the uneven portion 24 in which the unevenness is repeated in the circumferential direction, the protruding piece 35 generates a repeated sound when it rotates with respect to the tubular body 20. Then, when the cap portion 30 is fully closed with respect to the container body 10, the protruding piece 35 does not get over the convex portion 26 and the generation of sound stops, so whether or not the cap portion 30 is fully closed. Can be determined. The sealed structure 50 configured in this way can prevent problems such as the cap portion 30 being loosely tightened and the contents spilling, or the cap portion 30 being overtightened causing damage to the sealed structure 50.

In particular, the oily one, which is an example of the contents stored in the container, is easy to leak even if the cap is loosely tightened and the gap is small. The leaked oil causes a problem that the hands and the surroundings are soiled when the container is handled. However, since the tube container 100 in which the sealed structure 50 is used is configured so that it can be determined that the cap portion 30 is properly tightened with respect to the tubular body 20, the above-mentioned problems can be reliably prevented. can do.

FIG. 5 shows the radial overlap width B of the protruding piece 35 fitted in the concave portion 25 with the convex portion 26. That is, the overlap width B is the distance between the radial inner side of the projecting piece 35 projected on the radialally cut plane of the tubular body 20 and the radial outer end of the convex portion 26. be. If the overlapping width B is too large, the protruding piece 35 becomes a resistance when the cap portion 30 rotates, and the cap portion 30 becomes difficult to rotate. Therefore, it is preferable that the protruding piece 35 has a radial overlap width B with the convex portion 26 when fitted into the concave portion 25 is 0.5 mm or less.

It is preferable that the protruding piece 35 is configured to fit into the recess 25 when the degree of engagement between the male screw 22 and the female screw 33 is larger. That is, it is preferable that the protruding piece 35 is designed so as not to fit into the recess 25 when the cap portion 30 is fully open with respect to the tubular body 20, but to fit into the recess 25 when the cap portion 30 is fully closed. With this configuration, when the projecting piece 35 rotates with respect to the tubular body 20, no sound is generated from the fully opened state to the middle, and the time when the projecting piece 35 comes into contact with the convex portion 26. Sound will be generated from the time when the sound is fully closed.

If the number of the convex portions 26 is too small, it becomes difficult to continuously generate sound when the projecting piece 35 rotates with respect to the tubular body 20. On the other hand, if the number of the convex portions 26 is too large, the uneven portions 24 are not properly formed and it becomes difficult to form the tubular body 20. Therefore, it is preferable that the number of convex portions 26 is 30 or more and 60 or less. The sealed structure 50 configured in this way makes it easy to confirm that the sound is no longer generated, and can appropriately recognize that the cap portion 30 is fully closed with respect to the tubular body 20. ..

FIG. 6 is a plan view of the container body 10 according to the modified example. The tubular body 20 of the container body 10 according to the modified example shown in FIG. 6 is provided with 30 recesses 125 and 30 convex portions 126, respectively. Therefore, the convex portion 126 exemplified in FIG. 6 is formed with a central angle of 12 ° with respect to the radial center of the pedestal portion 23.

Further, if the pitch P is too narrow, the convex portions 26 and 126 are difficult to form, and the protruding pieces 35 are difficult to fit into the concave portions 25 and 125, so that sound is less likely to be generated. On the other hand, if the pitch P is too wide, the generated sounds will not be continuous. Therefore, it is preferable that the pitch P of the protrusions 26 and 126 is 0.6 mm or more and 4.0 mm or less.

Since the sealed structure 50 is configured so that the generated sounds are continuous, the certainty when determining the closed state of the cap portion 30 is improved. Therefore, it is preferable that the number of sounds generated from the fully open state to the fully closed state of the cap portion 30 with respect to the tubular body 20 is at least 5. Since the sound is continuously generated by the sealing structure 50 configured in this way, the user can surely hear the generated sound, and the cap portion 30 is properly tightened to the cylinder 20. Can be grasped.

The sealing structure 50 is also configured so that the intensity of the generated sound is high, so that the certainty when determining the closing degree of the cap portion 30 is improved. Therefore, it is preferable that the sound intensity generated when the cap portion 30 rotates at a speed of at least 30 rpm with respect to the tubular body 20 is higher than −35 dB at the sound pressure level. Since the sound generated by the sealing structure 50 configured in this way is sufficiently strong, the user can surely hear the generated sound, and the tightness of the cap portion 30 with respect to the tubular body 20. Can be properly grasped.

FIG. 7 is a bottom view of the cap portion 130 according to the modified example. When the number of the protruding pieces 35 is composed of a plurality of pieces, the intensity of the generated sound can be increased, which is preferable. However, the projecting piece 35 can also be configured independently. Since the uneven portion 24 is provided in the circumferential direction of the outer peripheral surface of the pedestal portion 23 so that the unevenness is repeated, even if the protruding piece 35 is alone as in the cap portion 130 exemplified in FIG. During the rotation, it will surely fit into the recess 25. Therefore, the sealed structure 50 can be configured to reliably generate sound even if the concave-convex portion 24 and the protruding piece 35 are not strictly aligned with each other in the fully closed state. The production of 50 can be facilitated.

As described above, the first screw may be a double-threaded screw or a multi-threaded screw instead of the single-threaded screw, and the corresponding second screw may be a double-threaded screw or a multi-threaded screw instead of the single-threaded screw. Is also good. FIG. 8 is a bottom view of the cap portion 230 according to another modification. In the cap portion 230 exemplified in FIG. 8, a female screw 133 having two threads is formed. The larger the number of threads, the smaller the angle at which the cap portion 30 rotates with respect to the tubular body 20 from fully open to fully closed, and although tightening is completed faster with less tightening rotation, the number of sounds generated is smaller. It tends to decrease. Therefore, as illustrated in FIG. 8, in the sealed structure 50 in which the double-threaded female screw 133 is used, the number of convex portions 26 is made larger, and the axial length of the concave-convex portion 24 is made larger. It may be configured to do so.

FIG. 9 is a bottom view of the cap portion 330 according to still another modification. The cap portion 330 illustrated in FIG. 9 is composed of 12 protruding pieces 35. Thus, the number 12 of the projecting pieces 35, or Tsuoto preferably able to large sound intensity that occurs when configured to generate at the same time.

Further, when the uneven portion 24 cannot be formed finely due to the small diameter of the pedestal portion 23 and the number of the concave portions 25 and the convex portions 26 cannot be increased, the number of the protruding pieces 35 as in the cap portion 330. It is effective that is largely configured. That is, by appropriately adjusting and arranging the spacing between the convex portions 26 and the spacing between the protruding pieces 35, it is possible to ensure the continuity of sound generation even if the number of the convex portions 26 is slightly reduced.

On the other hand, if the number of the protruding pieces 35 is too large, the gap becomes small and it becomes difficult to remove the protruding pieces 35 and the like from the mold during molding, which is not preferable. Although the cap portion 330 is formed with a double-threaded female screw 133 as in the cap portion 230, this may be a single-threaded female screw 33.

By the way, when the degree of engagement between the male screw 22 and the female screw 33 is larger, the protruding piece 35 is configured so that the contact surface with the convex portion 26 becomes larger, or the protruding piece fits into the concave portion 25. The number of 35 may be configured to increase more. With this configuration, the sound intensity generated can be increased as the cap portion 30 approaches the fully closed state. For example, although not shown in the illustration, this may be configured so that the lengths of the individual projecting pieces 35 projecting in the axial direction are different from each other.

The tubular body 20 is made of a material that can be molded so as to have an appropriate hardness, does not affect the quality of the contents, and does not hinder hygiene even if it comes into contact with the contents.

As such a material, a thermoplastic resin is used for the tubular body 20, and more specifically, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene (homopolypoly, block-like). Polyolefin resins such as polypropylene and random polypropylene), copolymers of olefins with copolymerizable monomers such as vinyl-based monomers, acrylic-based monomers and unsaturated carboxylic acids, and polyolefin-based resins such as blend compositions thereof, and A resin or the like in which the above-mentioned resin is blended with high-density polyethylene is used. In particular, from the viewpoint of heat resistance and heat adhesion when the body portion 11 is manufactured as a separate body, it is preferable to use a resin in which high-density polyethylene is blended with linear low-density polyethylene.

In particular, a Rondel material as a barrier material may be laminated on the shoulder portion 12 in order to prevent the permeation of a gas such as oxygen. Further, a film-shaped laminate formed into a tubular shape may be used for the body portion 11. The laminate may include a barrier layer or may have a printed layer formed therein.

The container body 10 may be manufactured by adhering a preformed tubular body 20, a shoulder portion 12, and a body portion 11, or these may be integrally manufactured. For the molding of the cylinder 20 and the shoulder portion 12, for example, a compression molding method can be used. For example, the container body 10 can be molded by molding, compressing, and cooling the molten resin extruded into a molding die having the shape of the container body 10.

The sealed structure 50 according to the present embodiment does not require a protrusion near the pedestal portion 23 and the shoulder portion 12 of the container body 10 to prevent the cap portion 30 from being inadvertently opened. If the thick portion such as the protrusion is not uniformly cooled during compression molding, the resin is deformed, so that adjustments such as lengthening the cooling time are required, which is troublesome. Since the sealed structure 50 has no protrusions, this labor can be saved and the manufacturing becomes easy.

The cap portion 30 is also made of a material that can be molded so as to have an appropriate hardness, does not affect the quality of the contents, and does not hinder hygiene even if it comes into contact with the contents. Similarly, a thermoplastic resin is used for the cap portion 30. It is preferable that polypropylene, high-density polyethylene, or the like is used for the cap portion 30.

The cap portion 30 is attached to the container body 10 thus formed. Since the sealed structure 50 can be configured to reliably generate sound even if the uneven portion 24 in the fully closed state and the projecting piece 35 are not strictly aligned, it takes time and effort for molding. It can be omitted and easy to manufacture. If necessary, a sealing seal may be further attached to the spout 21.

The contents contained in the tube container 100 can be filled from the lower end of the body portion 11. The contents of the tube container 100 can be filled with toiletries such as toothpaste, cosmetics such as face wash cream, pharmaceuticals such as ointment, and foodstuffs such as kneaded wasabi. The lower end of the body portion 11 of the tube container 100 filled with the contents is heat-sealed from the state shown in FIG. 1 to form a bottom seal portion (not shown), whereby a filler can be obtained.

As described above, the sealed structure 50 according to the present embodiment includes a tubular body 20 that defines the spout 21 of the container body 10, and a cap portion 30 that seals the spout 21, and is a male screw. A concave-convex portion 24 in which radial irregularities are repeated in the circumferential direction and a female screw 33 that meshes with the male screw 22 are formed on the outer peripheral surface of the pedestal portion 23 protruding outward from the tubular body 20 in which the 22 is formed. A protrusion configured to fit into the concave portion 25 of the uneven portion 24 in the radial direction from the ridged tubular body 31 of the cap portion 30 and to get over the convex portion 26 in response to the rotation of the cap portion 30 with respect to the tubular body 20. A piece 35 is provided, and the projecting piece 35 is configured to vibrate and generate a sound each time it gets over the convex portion 26 and fits into the concave portion 25. Further, according to the configuration according to the present embodiment, it is possible to provide a sealed structure 50 in which an appropriate closed state is easily and surely realized and easy to manufacture, and a tube container 100 in which the sealed structure 50 is used. ..

Hereinafter, the present disclosure will be described in more detail and concretely with reference to Examples. However, the present disclosure is not limited to the following examples.

<Material and manufacturing method>
[Example 1]
A container body 10 having 45 protrusions 26 as shown in FIGS. 2 and 3 and a cap 130 having 1 protrusion 35 as shown in FIG. 7 were prepared. The container body 10 was formed by compression molding using high-density polyethylene as a material, and the cap portion 130 was formed by injection molding using polypropylene as a material. Therefore, the sealed structure 50 according to the first embodiment fits into the concave-convex portion 24 repeated in the circumferential direction and the concave portion 25 of the concave-convex portion 24, and the convex portion 26 corresponds to the rotation of the cap portion 30 with respect to the container body 10. According to the present embodiment, the projecting piece 35 is provided with a projecting piece 35 configured to get over, and the projecting piece 35 is configured to vibrate and generate a sound each time it gets over the convex portion 26 and fits into the concave portion 25. It had characteristics.

[Example 2]
It was the same as in Example 1 except that the cap portion 30 having 2 protruding pieces 35 as shown in FIG. 4 was used.

[Example 3]
As shown in FIG. 8, the number of the protruding pieces 35 is 2, and the cap portion 230 of the female screw 133 having two threads is used. Correspondingly, the screw 22 of the container body 10 is also formed into two threads. Was the same as in Example 1 except that was used.

[Example 4]
As shown in FIG. 9, the number of protruding pieces 35 is 12, and the cap portion 330 of the two-threaded female screw 133 is used. Correspondingly, the screw 22 of the container body 10 is also formed into two threads. Was the same as in Example 1 except that was used.

[Comparative Example 1]
A commercially available tube container containing a general-purpose paste seasoning manufactured by Company A was used. The cap of the container of Comparative Example 1 had one configuration corresponding to the protruding piece 35 and one screw thread. The main body of the container of Comparative Example 1 had one protrusion instead of having the uneven portion 24. Therefore, the container of Comparative Example 1 did not have the characteristics according to the present embodiment.

[Comparative Example 2]
A commercially available tube container containing food made from milk or the like manufactured by M company was used. The cap of the container of Comparative Example 2 had two configurations corresponding to the protruding pieces 35 and two screw threads. The main body of the container of Comparative Example 2 had two protrusions instead of having the uneven portion 24. Therefore, the container of Comparative Example 2 also did not have the characteristics according to the present embodiment.

<Evaluation method>
(Sound pressure level)
The cap of each tube container is rotated at a rotation speed of 30 rpm at a position 2 cm from the microphone of a smartphone (Sony Mobile Communications Inc., Xperia (registered trademark) Z5 SO-01H, OS: Android (registered trademark) version 6.0). , It was turned from the fully open state to the fully closed state. The electrical signal converted by the microphone was analyzed by FrequenSee (development: Daniel Bach), a spectrum analyzer application software for smartphones, and the sound pressure level G _vn [db] was calculated.

Here, the sound pressure level G _vn is a dimensionless quantity expressed as a so-called level expressed by a logarithm of the ratio of _{the sound pressure P n} as a measured physical quantity to the reference quantity P _0. The sound pressure level G _vn can be calculated using the equation (1).

Furthermore, it was also made calculation of relative values P _{n /} P ₁ when the sound pressure P ₁ of Comparative Example 1 is 1. The relative value P _n / P ₁ can be calculated as follows based on the equation (1). That is, when the logarithm of the equation (1) is returned to the antilogarithm, the equation (2) is obtained.

Then, by multiplying both sides of the equation (2) by P ₀ , the equation (3) representing the sound pressure P _{n can be obtained.}

Therefore, the sound pressure P _n of the sound pressure level G _vn, and wherein the dividing P ₁ of the sound pressure P _n Comparative Example 1 using a sound pressure level G _v1 of the sound pressure P ₁ of Comparative Example 1 as a reference It looks like this:

From the formula (4), it can be seen how many times _{the sound pressure P n of each example and the comparative example is P 1} of the comparative example 1. Table 1 shows the sound pressure level G _vn [db] and the relative value P _n / P ₁ [−].

(Sound continuity)
It was determined whether or not the sound generated when the cap of each tube container was rotated from the fully open state to the fully closed state at a rotation speed of 30 rpm was a continuous sound. Table 1 shows the results of the evaluation of sound continuity in each tube container, and is represented by ◯: continuous sound, ×: single sound.

(comprehensive evaluation)
Comprehensive evaluation of each tube container was made based on the sound pressure level and sound continuity described above. Table 1 shows the results of the comprehensive evaluation. Comprehensive evaluation is indicated by ○: good, ×: no aptitude.

The following points were derived from the above-mentioned examples. In any of the sealed structures 50 of Examples 1-4, sound was generated at a sound pressure level higher than that of the container of Comparative Example 1. In particular, in the sealed structure 50 according to Example 3, sound was generated at a higher sound pressure level than in Comparative Example 2 having the same number of threads of screws and the number of protruding pieces. Therefore, it was shown that in the sealed structure 50 according to the present embodiment, the loudness of the generated sound can be made larger.

Further, while the sounds generated in the containers of Comparative Example 1 and Comparative Example 2 were simple sounds, continuous sounds were generated in any of the sealed structures 50 of Examples 1-4.

From the results of the above examples, it was shown that the sealed structure 50 according to the present embodiment has a louder sound and a longer sounding time, so that the generated sound is easy to hear.

The present disclosure can be suitably used for a tube container 100 that can be crushed to squeeze out the contents. However, the present disclosure is not limited to the embodiments described above. The contents filled in the tube container 100 of the present disclosure are not particularly limited as long as they have fluidity, and daily necessities such as cosmetics, detergents, pharmaceuticals and miscellaneous goods, and foods such as beverages and seasonings. It may be an industrial product such as an adhesive, or something else.

10 Container body 20 Cylinder 21 Spout 22 Male screw (first screw)
23 Pedestal part 24, 124 Concavo-convex part 25, 125 Concave part 26, 126 Convex part 30 Cap part 31 Elevated cylinder 33 Female thread (second screw)
35 Projection piece 50 Sealed structure 100 Tube container (packaging container)

Claims (7)

A sealed structure including a cylinder that defines a spout and a cap portion that seals the spout.
An uneven portion in which the radial unevenness is repeated in the circumferential direction on the outer peripheral surface of the pedestal portion protruding outward in the radial direction from the tubular body on which the first screw is formed, and a concave-convex portion.
It fits into the concave portion of the uneven portion on the outer side in the radial direction from the ecstatic cylinder of the cap portion on which the second screw that engages with the first screw is formed, and causes the rotation of the cap portion with respect to the cylinder. Equipped with a protruding piece that is configured to overcome the convex part correspondingly,
The projecting piece, Ri tabular der projecting from the side of the top of the closed top cylinder in the axial direction of the lower,
The cap portion has a gap extending downward in the axial direction between the projecting piece and the ridged cylinder.
The upper part of the protruding piece is fixed to the side portion of the eclipsed cylinder, and the lower end of the protruding piece is free.
Sealing structures the projecting piece, characterized in Rukoto formed along the closed top cylinder. When the degree of engagement between the first screw and the second screw is greater, the projecting piece is configured so that the contact surface with the convex portion becomes larger.
It is configured to generate a sound when the protruding piece fits into the concave portion and gets over the convex portion .
Seal according to claim 1, the number of the sound generated from the state of the cap portion is fully opened to the cylinder before the fully closed state, characterized in Rukoto configured to be at least 5 Structure. The invention according to any one of claims 1 to 2, wherein the convex portions are evenly arranged on the outer peripheral surface in the circumferential direction, and the number of the convex portions is 30 or more and 60 or less. Sealed structure. The sealed structure according to any one of claims 1 to 3, wherein the convex portion has a pitch of 0.6 mm or more and 4.0 mm or less. The sealed structure according to any one of claims 1 to 4, wherein the number of the protruding pieces is a plurality. The sealing according to any one of claims 1 to 5, wherein the protruding piece has a radial overlap width of 0.5 mm or less with the convex portion when it is fitted into the concave portion. Structure. A packaging container comprising the sealed structure according to any one of claims 1 to 6.

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