JP6121235B2 - Stoppers and food containers - Google Patents

Description

  The present invention relates to a stopper used for closing a mouth portion of a container body that accommodates food and drink such as beverages, soups, porridges, and the like, and particularly relates to a stopper and a food container that can be attached to and removed from the container body with screws.

  This type of plug is provided with a removable plug packing. The stopper packing is made of a flexible material such as silicone rubber, and is formed of an annular part that can be fitted to the stopper body by its elastic fastening force. While the stopper is screwed into the container body, the stopper packing is pressed against the inner periphery of the mouth of the container body, and the space between the stopper and the inner periphery of the mouth is sealed in a watertight manner.

  For example, as this kind of stopper, a disassembly type is used. In the disassembly, at least the stopper ring and the stopper body are divided. The plug ring is provided with a thread. The plug body is attached to and detached from the plug ring. The stopper packing is attached to and detached from the stopper body. When the screw ring of the stopper ring is screwed into the screw thread of the container body, the stopper ring and the stopper main body unitized by the locking structure rotate together and are displaced in the central axis direction. By disassembling the stopper ring and the stopper body, it becomes easy to clean the thread of the stopper ring and the outer periphery of the stopper body (Patent Document 1).

JP 2011-230848 A

  In this type of plug, when the plug is attached to the container body, the plug is screwed in by gripping and twisting the outer periphery of the plug, and the plug is rotated around the central axis while being displaced in the central axis direction. It is pressed against the inner periphery of the mouth. As a result, the frictional force generated between the plug packing and the inner periphery of the mouth acts as a torque in the direction reverse to the screwing of the plug and acts on the plug packing, causing torsional deformation of the plug packing. Between the screw thread of the stopper and the screw thread of the container body, a gap for allowing a dimensional error in manufacturing and smooth screwing is set. Unless the user rotates the plug while pushing it in the direction of the central axis of the screw thread, the elastic repulsion force accumulated by the torsional deformation eventually exceeds the frictional force, and the plug packing slips against the inner periphery of the mouth. To do. When the slip occurs, the portion that is twisted and deformed is blown at a stroke, and the twist is eliminated. Due to the reaction of the cancellation, the screw thread of the stopper collides with the screw thread of the container body. Since the screwing operation of the plug is continued, the torsional deformation and the elimination of the plug packing are repeated at a high speed until the frictional force is not lost by the elastic repulsion force. During this repetition, the collision between the screw threads is repeated at a high speed, and there is a problem that unpleasant vibration noise and unpleasant vibration transmitted to the hand performing the screwing operation of the plug are generated.

  Accordingly, the problem to be solved by the present invention is to suppress the generation of unpleasant vibrations transmitted to the hand or vibrations caused by elastic repulsion of the plug packing when the plug is screwed into the container body.

In order to solve the above problems, the present invention includes a plug ring provided with a thread, a plug body attached to and detached from the plug ring, and a plug packing attached to and detached from the plug body. In a stopper that is attached to the container body by screwing a screw thread into the thread of the container body, and the stopper packing is pressed against the inner periphery of the mouth of the container body during the screwing, the stopper body is attached to the stopper ring. On the other hand, a configuration in which the screw thread is rotatably mounted around the central axis of the screw thread is adopted.
According to this configuration, when the stopper is screwed into the container body, the stopper ring can freely rotate in the screwing direction with respect to the stopper body and the stopper packing. For this reason, when the frictional force between the stopper packing and the mouth inner periphery of the container body becomes stronger, the stopper ring rotates in the screwing direction, but the stopper body is not rotated by the frictional force between the stopper packing and the inner periphery of the mouth. . After this state, the torsional deformation of the plug packing cannot be restored. Therefore, when the stopper is screwed into the container body, generation of vibration sound due to elastic repulsion of the stopper packing and unpleasant vibration transmitted to the hand performing the screwing operation of the stopper can be suppressed. In the present application, the “central axis” means the central axis of the thread of the stopper ring. In the present application, the concept of “circumference” refers to a circumference around the central axis.

  In the above configuration, the connection structure for making the plug body and the plug ring rotatable is not particularly limited. Examples of the connection structure that can be used include a connection structure that rotatably locks the plug main body with respect to the plug ring, and a bearing structure that rotatably supports the plug main body with the rolling element with respect to the plug ring.

For example, when the above-described connection structure is adopted, the plug ring has a locking wall portion protruding toward the central axis over the inner periphery, and the plug main body has one end in the central axis direction on the locking wall portion. A first locking portion hooked from the side, and a second locking portion hooked to the locking wall portion from the other side in the central axis direction, wherein the first locking portion is centered on the plug body and the plug ring. What is necessary is just to make it have the flexibility which can get over the said locking wall part during an axial combination. In the present application, the “center axis direction” refers to a direction along the center axis.
When the plug body is combined with the plug ring from the other side in the central axis direction toward the one side, the first locking portion of the plug body is pressed against the locking wall portion of the plug ring from the other side in the central axis direction. Due to the flexibility of the first locking portion, the first locking portion undergoes bending deformation that escapes from the pressed locking wall portion, and gets over the locking wall portion. When the bending deformation of the first locking portion is elastically recovered, the first locking portion can be hooked to the locking wall portion from one side in the central axis direction to the other side. For this reason, the stopper main body and the stopper ring are prevented from being separated by the first locking portion, the second locking portion, and the locking wall portion.
Here, since the locking wall extends over the inner periphery of the stopper ring, when the stopper is screwed into the container body, the above-described separation stopper is maintained regardless of the direction around the central axis of the stopper ring with respect to the stopper body. Is done. Moreover, since the displacement movement in the central axis direction of the plug ring is transmitted from the locking wall portion to the first locking portion or the second locking portion, the plug main body is also displaced in the same direction.

  More specifically, it is preferable that the plug ring has a surrounding portion that is radially opposed to the first locking portion hooked on the locking wall portion. This enclosure part prevents other objects from hitting the first locking part. In the present application, a linear direction perpendicular to the central axis direction is referred to as a “radial direction”.

  The inner diameter of the surrounding portion may be increased as the distance from the locking wall portion increases toward the one side from the other side in the central axis direction. Due to this inner diameter change, when the user disassembles the stopper, the user can easily put his / her finger on the first locking portion caught on the locking wall portion.

In the above configuration, the cap body further includes a cap that is attached to and detached from the stopper body, the stopper body having an opening facing the cap in the central axis direction, and the cap is inserted into the opening from the central axis direction. A shaft portion, a flange portion that covers the stopper ring, and a rotation prevention portion that engages the stopper ring in a rotational direction around a central axis, and one of the opening portion and the shaft portion has an entire circumference. It is preferable that an annular wall protruding in the radial direction is formed, and a retaining portion that is hooked in the central axis direction with respect to the annular wall is formed.
The cap can rotate with respect to the opening of the plug body about the shaft. Even if the cap rotates, the retaining portion can be caught on the annular wall over the entire circumference, so that the cap and the plug main body are prevented from being separated even if the cap and the plug ring rotate integrally with the plug main body.
When the stopper is screwed into the container body, the stopper body covers the stopper body, so there is no concern that torque is applied to the stopper body from the user's hand.
When the user attaches / detaches the stopper to / from the container body, even if the user holds the cap, the stopper portion of the cap engages with the stopper ring in the rotational direction. By this engagement, the cap rotates together with the plug ring, so that the plug ring can be rotated even if the user holds the cap.
In order to obtain practical mechanical strength, the cap and the plug body are formed using a hard material such as engineering plastic or metal. Even if the annular wall and the retaining portion are rotated while being caught, since these are hard portions formed on the cap and the stopper main body, substantial torsional deformation does not occur. In other words, even if the cap rotates with the plug ring, the annoying vibration sound resulting from the deformation of the annular wall and retaining part and unpleasant vibration transmitted to the hand performing the screwing operation of the plug are generated. Never do.

More preferably, the retaining portion is composed of two protrusions formed in two halves around the central axis, and the flange portion is located at a position that differs by 90 ° around the central axis with respect to the retaining portion in the circumferential direction. It is preferable to include a finger-hanging wall protruding outward in the radial direction from the stopper ring as the center.
When both the retaining portion and the annular wall are provided over the entire circumference, when the cap is attached to the stopper main body, the force required to get over the annular wall over the retaining portion becomes relatively large. By constructing the retaining portion with two equally spaced projections, the work of getting over the annular wall over the retaining portion can be facilitated while obtaining the effectiveness of the retaining portion in a well-balanced manner.
If there is a finger-hanging wall protruding radially outward from the stopper ring, the work of removing the cap becomes easy.
Here, the finger-hanging wall having a central position in the circumferential direction at a position different by 90 ° around the central axis with respect to the retaining portion is around the central axis with respect to one reference straight line capable of connecting two equally-spaced protrusions. It means that the center of the circumferential length of the finger-hanging wall is set on a position different by 90 °. If a finger-hanging wall is made in this way, when the container with a stopper is toppled or dropped, the cap will easily tilt around a straight line connecting the two-pronged protrusions when the finger-hanging wall collides with another object. Therefore, the inclination of the retaining portion can be effectively suppressed. Therefore, even if the finger hanging wall collides with another object, it is difficult to remove the cap.

  Further, when the direction around the central axis of the cap with respect to the plug ring is out of a predetermined range, the cap is received in the central axis direction by the plug ring before the retaining portion gets over the annular wall. It is also preferable to make it. Thereby, the attachment direction of a cap can be restrict | limited to a predetermined range using a stopper ring. Such cap direction limitation is designed to limit the cap orientation when assembling the stopper, or when the above-mentioned finger hanging wall is used, the retaining portion and the finger hanging wall are in the above 90 ° positional relationship. It is suitable when it is desired to limit the direction of the cap.

  The food and drink container including the stopper and the container body according to the present invention can be disassembled and cleaned even if the stopper becomes dirty with food and drink, and when the stopper is screwed into the container body, vibration due to elastic repulsion of the stopper packing Generation of sound and unpleasant vibration transmitted to the hand can be suppressed.

  As described above, according to the present invention, when the stopper is screwed into the container body, if the frictional force between the stopper packing and the inner periphery of the mouth of the container body becomes strong, the stopper ring to be turned by the user is screwed. The plug body that can rotate freely with respect to the plug ring is displaced in the central axis direction together with the plug ring without being rotated by the friction between the plug packing and the inner periphery of the mouth. Generation of unpleasant vibrations transmitted to the hand performing the screwing operation of the stopper and the vibration sound due to the elastic repulsion of the packing can be suppressed.

(A) is the longitudinal front view which showed the food-and-drink container which concerns on 1st embodiment of this invention with the cut surface containing the central axis of a stopper, (b) showed with the cut surface at right angles to the said (a). Partial cross section Exploded perspective view of a plug according to the first embodiment of the present invention (A) is a top view of the plug ring of the first embodiment, and (b) is a half cross-sectional view in which a cross-section of the plug ring is drawn on the left half and a side surface of the plug ring is drawn on the remaining right half. , (C) is a bottom view of the stopper ring. (A) is a half sectional view in which the front of the cap of the first embodiment is drawn on the left half in the figure, and the cross section of the cap is drawn in the remaining right half, (b) is a partial side view of the cap, (c) is an enlarged sectional view taken along line cc in (a), (d) is a top view of the plug body of the first embodiment, (e) is a longitudinal front view of the plug body, f) is a side view of the plug body. (A) is an operation diagram showing the positional relationship of the initial plug ring, the plug body, and the cap screwed into the container body in the first embodiment, and (b) shows the plug packing in the case of (a). (C) is an operation view showing a state in which the plug ring, the plug body, and the cap are integrally rotated from the state of (a), and (d) is a portion showing the plug packing in the case of (c). Sectional view, (e) is an action diagram when the plug ring and cap rotate integrally from the state of (c), and the plug body does not rotate in the screwing direction, and (f) is the state of (e) Partial sectional view showing the plug packing of (A) is a partial longitudinal sectional front view showing a retaining portion and an annular wall of the second embodiment of the present invention, and (b) is a partial side view showing the retaining portion. Partial longitudinal sectional front view showing a retaining portion and an annular wall of the third embodiment of the present invention Partial longitudinal sectional front view showing a cap and plug body mounting structure of a fourth embodiment of the present invention Partial longitudinal sectional front view showing a modified example of the fourth embodiment Partial longitudinal sectional front view showing another modification of the fourth embodiment (A) is the partial top view which showed the attachment structure of the stopper main body and stopper ring of 5th embodiment of this invention, (b) is a partial longitudinal cross-sectional front view of the attachment structure of said (a). (A) is a partially exploded perspective view showing a modified example of the fifth embodiment, (b) is a longitudinal sectional view of the modified example of (a). Partially exploded perspective view showing another modified example of the fifth embodiment, (b) is a longitudinal sectional view of the modified example of (a)

  Hereinafter, the food and drink container according to the first embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1A, this food and drink container is a portable one that includes a container body 1 and a plug 2 that is attached to and detached from the container body 1.

  The container body 1 has a bottom part that stands on a horizontal plane, and is made of a rigid container that can accommodate a predetermined volume of beverage or food. Hereinafter, the direction perpendicular to the horizontal plane is defined as the vertical direction with respect to the case where the container body 1 is set on the horizontal plane. A mouth portion 3 is opened on the upper surface of the container body 1. As such a container body 1, a heat insulating container such as a thermos bottle or a stainless steel vacuum double container can be employed.

  The stopper 2 closes the mouth 3 in a watertight manner while being attached to the container body 1. The plug 2 includes a plug ring 4, a plug body 5, a plug packing 6, and a cap 7. The plug body 5 is attached to and detached from the plug ring 4. The stopper packing 6 is attached to and detached from the stopper body 5. The cap 7 is attached to and detached from the plug body 6.

  As shown in FIGS. 1 and 2, the plug ring 4 has a female screw portion 8. A thread 8 a is provided on the inner periphery of the female screw portion 8. The screw thread 8 a is screwed into the screw thread 9 a of the male screw portion 9 provided on the outer periphery of the container body 1. The central axis C1 of the screw thread 8a is along the up-down direction. That is, the central axis direction is set in the vertical direction.

  As shown in FIGS. 1, 2, and 3, the stopper ring 4 has a locking wall portion 10. The locking wall portion 10 protrudes toward the central axis C1 side of the screw thread 8a over the inner periphery. The locking wall portion 10 is provided so as to protrude from the female screw portion 8 to the inside of the mouth portion 3 across the peripheral wall of the container body 1. The locking wall portion 10 has concentric flat surfaces 10a and 10b along the radial direction over the entire circumference.

  As shown in FIGS. 1, 2, and 4, the plug body 5 includes a first locking portion 11 and a second locking portion 12. The 1st latching | locking part 11 and the 2nd latching | locking part 12 have the flat surfaces 11a and 12a along the radial direction, respectively. The flat surface 11 a of the first locking portion 11 can be hooked on the flat surface 10 a of the locking wall portion 10 from one side in the central axis direction. The flat surface 12a of the second locking portion 12 can be hooked on the flat surface 10b of the locking wall portion 10 from the other side in the central axis direction. In the illustrated example, one side in the central axis direction is set on the upper side, and the other side in the central axis direction is set on the lower side.

  The 1st latching | locking part 11 consists of a bending piece part provided in two places by the circumferential direction equal distribution. The flexure piece is separated from the guide walls 14 on both sides in the circumferential direction by the slits 13 and 13. The first locking portion 11 has a tapered surface 11b that gradually approaches the central axis C1 side in the radial direction upward from the flat surface 11a. The outer diameter of the guide wall 14 and the outer diameter of the first locking portion 11 below the flat surface 11a are set coaxially with the flat surfaces 10a and 10b of the locking wall 10 and It is set so as to be a clearance fit with respect to the inner periphery of the stop wall 10. The plug body 5 is guided in the radial direction with respect to the plug ring 4 by the contact at the clearance fitting portion.

  The second locking portion 12 continues to the lower side of the guide wall 14. The flat surface 12a is at a lower position below the flat surface 11a. The central axis direction interval between the flat surfaces 11 a and 12 a is set wider than the central axis direction interval between the flat surfaces 10 a and 10 b of the locking wall portion 10.

  When the plug body 5 is pushed upward with respect to the plug ring 4 in a state where the first locking portion 11 and the guide wall 14 are arranged substantially coaxially with respect to the flat surfaces 10a and 10b of the locking wall portion 10 from below. The tapered surface 11 b is pressed against the locking wall portion 10. At this time, each bending piece of the first locking portion 11 is bent toward the central axis C1 by the radial component force obtained by the tapered surface 11b, and the tapered surface 11b and the flat surface 11a get over the locking wall portion 10. Thus, the 1st latching | locking part 11 has the flexibility which can get over the latching wall part 10, while combining the stopper main body 5 and the stopper ring 4 in the center axis direction.

  As described above, when the flat surface 11a of the first locking portion 11 gets over the locking wall portion 10, the flat surface 11a faces the flat surface 10a in the central axis direction due to elastic recovery of the bending piece. At this time, the flat surface 12 a of the second locking portion 12 also faces the flat surface 10 b of the locking wall portion 10 in the central axis direction. For this reason, when the plug body 5 tries to be displaced to one side or the other side in the central axis direction with respect to the plug ring 4, the flat surface 12a is caught on the flat surface 10b, or the flat surface 11a is caught on the flat surface 10a. 5 is separated from the stopper ring 4. The stopper body 5 is rotatably attached to the stopper ring 4 around the central axis C1 of the screw thread 8a by the separation stopper and the radial guide described above. The stopper body 5 and the stopper ring 4 can be separated by pressing the taper surface 11b of the first locking portion 11 with the finger toward the central axis C1 and pressing it downward while removing the flat surface 11a from the flat surface 10a. it can.

  In addition, it is not necessary that the flat surfaces 11a and 12a are hooked at the same time in a state in which the flat surface 11a of the first locking portion 11 gets over the locking wall portion 10. When the stopper ring 4 is turned and the stopper 2 is screwed into the container body 1, when the stopper ring 4 is turned reversely to remove the stopper 2 from the container body 1, As long as the stopper 12 and the first locking part 11 are caught, it is only necessary to obtain performance capable of displacing the plug body 5 in the central axis direction with desired accuracy.

  In addition, the second locking portion 12 in the illustrated example is provided only in a circumferential region excluding the first locking portion 11 in order to facilitate molding of the first locking portion 11. It may be provided over the entire circumference. Moreover, although the 1st latching | locking part 11 may also be provided over a perimeter, in order to make it easy to get over the latching wall part 10, it is better to limit and provide in the circumferential direction two equality. Moreover, it is preferable to provide the taper surface 10c for obtaining the same radial direction component force in the locking wall part 10 instead of or using together with the taper surface 11b. In the illustrated example, the above-described overcoming is particularly facilitated by using the tapered surface 11b and the tapered surface 10c together.

  As shown in FIGS. 1, 2, and 3, the plug ring 4 includes a first locking portion 11 that is hooked on the locking wall portion 10 and a surrounding portion 15 that faces the radial direction. The enclosure 15 includes a recess 15a that is relatively low in the central axis direction, and a receiving wall surface 15b that extends in the radial direction in the remaining circumferential region. The enclosure part 15 prevents the other objects from hitting the first locking part 11. Specifically, when the cap 7 collides somewhere due to dropping or the like, the receiving wall surface 15b first contacts the cap 7 so that the deformed cap 7 does not hit the first locking portion 11 as another object. It is supposed to be. The recess 15a is provided to prevent rotation of a cap 7 described later.

  The inner diameter of the enclosure 15 increases as the distance from the locking wall 10 toward the one side from the other side in the central axis direction increases. Due to this inner diameter change, an upwardly expanding gap is formed between the enclosure 15 and the first locking portion 11 regardless of how the plug body 5 rotates with respect to the plug ring 4. Therefore, when the user disassembles the stopper, it is easy to apply a finger to the tapered surface 11b of the first locking portion 11 that is hooked on the locking wall portion 10.

  As shown in FIGS. 1, 2, and 4, the plug body 5 has an opening 17. The opening 17 faces the cap 7 in the central axis direction. The opening 17 in the illustrated example has an inner periphery of a circular cross section (the shape in an arbitrary horizontal cross section) that extends downward from the guide wall 14 and the first locking portion 11, and is open to the upper surface of the plug body 5. Has been. The cap 7 has a shaft portion 18 inserted into the opening 17 from the central axis direction. An annular wall 19 projecting in the radial direction over the entire circumference is formed in one of the opening 17 and the shaft portion 18, and a retaining portion 20 that is hooked in the central axis direction with respect to the annular wall 19 is formed in the other. Yes.

  In the illustrated example, an annular wall 19 is formed on the inner periphery of the opening 17. The annular wall 19 is set coaxially with the flat surfaces 10a and 10b, and is formed in the same cross-sectional shape (however, a shape in an arbitrary vertical cross-section) over the entire circumference. On the other hand, the retaining portion 20 is formed on the outer wall surface of the shaft portion 18. The retaining portion 20 is composed of two protrusions formed in two equal intervals around the central axis C1. Each protrusion is formed on the bridge portion 22 separated from the remaining portion of the shaft portion 18 in the circumferential direction by the slits 21 and 21. The shaft portion 18 has a cylindrical portion 23 that is coaxial with the annular wall 19. The cap 7 is guided in the radial direction by contact of the fitting portion between the cylindrical portion 23 and the inner periphery of the annular wall 19, the inner periphery of the guide wall 14, and the like. When the cap 7 is pushed downward with respect to the plug body 5 in a state where the annular wall 19 is disposed substantially coaxially with respect to the cylindrical portion 23 from above, the retaining portion 20 is pressed against the annular wall 19. At this time, the bridge portion 22 bends toward the central axis C <b> 1 by the radial component force obtained by the slopes of the retaining portion 20 and the annular wall 19, and the retaining portion 20 gets over the annular wall 19. When it gets over, the retaining portion 20 faces the annular wall 19 in the direction of the central axis due to the elastic recovery of the bridge portion 22. For this reason, when the plug body 5 is displaced upward with respect to the plug ring 4, the retaining portion 20 is caught by the annular wall 19, and the cap 7 is prevented from being separated from the plug body 5. Due to the same cross-sectional shape of the annular wall 19 described above, the retaining portion 20 can be hooked on the annular wall 19 over the entire circumference in the same manner regardless of the direction of the cap 7. Thus, the cap 7 is attached to the stopper body 5 around the central axis C1 so as to be rotatable around the cylindrical portion 23 of the shaft portion 18 by the separation stopper and the above-described radial guide. Therefore, even if the cap 7 and the plug ring 4 rotate integrally with respect to the plug body 5, the cap 7 and the plug body 5 are prevented from being separated. When the cap 7 is pulled upward, the plug body 5 and the cap 7 can be separated.

  By configuring the retaining portion 20 with two equally spaced projections, the work of getting over the annular wall 19 over the retaining portion 20 is facilitated while obtaining the effectiveness of the retaining portion 20 in a well-balanced manner.

  The cap 7 has a flange 24 that covers the stopper ring 4. The flange 24 is supported by the receiving wall surface 15 b of the enclosure 15 in the central axis direction and the radial direction. When screwing the stopper 2 into the container body 1, the stopper body 5 is covered with the flange 24 of the cap 7, so that the user's hand does not touch the stopper body 5, and the stopper body 5 is directly torqued from the hand. There is no worry to be given.

  Further, the cap 7 has a rotation stopper 25. The rotation stopper 25 can be engaged with the stopper ring 4 in the rotation direction around the central axis C1. The engagement destination of the rotation stopper 25 is the circumferential end surface of the recess 15a of the enclosure 15. Even when the user grasps the cap 7 when attaching and detaching the stopper 2 to / from the container body 1, the detent 25 of the cap 7 engages with the recess 15 a of the stopper ring 4 in the rotational direction. By this engagement, the cap 7 rotates integrally with the plug ring 4, so that the plug ring 4 can be rotated even if the user grasps the cap 7.

  The plug ring 4, the plug body 5, and the cap 7 are formed of, for example, engineering plastics in order to obtain practical mechanical strength. The plug ring 4, the plug body 5, and the cap 7 in the illustrated example are a single part in which each part is integrally formed by injection molding. Even if the annular wall 19 and the retaining portion 20 rotate while being caught, no substantial torsional deformation occurs. In other words, even if the cap 7 rotates together with the plug ring 4 with respect to the plug main body 5, an unpleasant vibration sound resulting from the deformation of the annular wall 19 and the retaining portion 20 and the screwing operation of the plug 2 are performed. There are no unpleasant vibrations to be transmitted.

  The collar portion 24 includes a finger hanging wall 26. The finger hanging wall 26 protrudes outward in the radial direction from the stopper ring 4. Since the cap 7 can be raised by applying a finger from the lower side of the finger hanging wall 26, the work of removing the cap 7 from the plug body 5 is facilitated.

  In FIG. 4C, one straight line C2 that connects the two protrusions constituting the retainer 20 in the radial direction is drawn by a one-dot chain line. FIG. 4A illustrates a cross section cut along a plane including the central axis C1 and perpendicular to the straight line C2. FIG. 4B illustrates the appearance of the cap 7 viewed from the direction of the straight line C2. As shown in FIGS. 4A to 4C, the circumferential center of the finger hanging wall 26 is set at a position that is 90 ° different from the retaining portion 20 around the central axis. For this reason, when it collides from the finger-hanging wall 26 due to dropping or the like from the state shown in FIG. 1A, an impact acts on the retaining portion 20 from a position different by 90 ° around the central axis toward the central axis. It becomes easy. That is, the cap 7 is easily tilted around a straight line connecting the two equally-spaced protrusions forming the retaining portion 20. When the cap 7 is tilted in this way, the tilt of the retaining portion 20 located on the center line of the tilt rotation is effectively suppressed. Therefore, the cap 7 is difficult to come off even if it collides from the finger hanging wall 26. Note that a straight line connecting the two equally spaced protrusions is present in addition to the straight line C2 illustrated in FIG. If any one of the straight line groups is used as the above 90 ° reference and the center in the circumferential direction of the finger hanging wall 26 is set, the effect that the cap 7 is easily tilted as described above can be expected. The portion of the finger hanging wall 26 that protrudes outward in the radial direction is the portion most likely to collide. For this reason, it is preferable to set the shape of the finger hanging wall 26 so as to protrude outward in the most radial direction on the center in the circumferential direction.

  When the cap 7 is attached to the stopper body 5 with the stopper body 5 attached to the stopper ring 4, when the direction around the central axis C <b> 1 of the cap 7 with respect to the stopper ring 4 is out of a predetermined range, the retaining portion 20 is annular. Before getting over the wall 19, the cap 7 is received in the direction of the central axis by the plug ring 4. The predetermined range is set so that the retaining portion 20 and the finger hanging wall 26 have the above-described 90 ° positional relationship. In the illustrated example, it is set by the rotation preventing portion 25 and the surrounding portion 15. That is, the rotation preventing part 25 is included in the collar part 24. When the cap 7 can be fitted into the recess 15a of the enclosing portion 15 with the rotation stopper 25, the cap 7 can be attached in the above-described 90 ° positional relationship. On the other hand, when the anti-rotation portion 25 and the receiving wall surface 15b are in the direction of the cap 7 facing in the central axis direction, the anti-rotation portion 25 contacts the receiving wall surface 15b before the retaining portion 20 gets over the annular wall 19, As described above, the cap 7 cannot be moved closer to the plug body 5 in the central axis direction.

  A check valve 27 is provided on the bottom wall of the opening 17. The check valve 27 prevents the liquid stored in the container body 1 from leaking into the opening 17 from the valve hole, but when the inside of the container body 1 becomes negative pressure due to a temperature drop, the valve hole And the air in the opening 17 is passed through the container body 1 to eliminate the negative pressure.

  The stopper packing 6 is formed of a flexible material such as silicone rubber. The plug packing 6 is an annular component that can be fitted to the plug body 5 by its elastic clamping force. The stopper packing 6 has a lip portion 28. On the inner periphery of the mouth portion 3 of the container body 1, an inner diameter reduced portion 29 having an allowance for the lip portion 28 is formed. The normal seal height by the lip portion 28 and the inner diameter reducing portion 29 is set to be higher than the water level line 30 at the normal capacity of the container body 1. The annular water level line 30 can be displayed on the container body 1 by an appropriate means such as printing, ruled line, or press working. In place of the water level line 30, a stepped portion having a further reduced inner diameter may be made. However, in the case where the contents are scraped out with scissors or the like, such as a launcher, the stepped portion is obstructive. Is preferably displayed.

  When the stopper 2 is assembled with the stopper packing 6 fitted to the stopper body 5 as described above, the stopper body 5 attached to the stopper ring 4, and the cap 7 attached to the stopper body 5, the stopper 2 becomes the container body. 1 can be attached. In this state, the stopper 2 is attached to the container body 1 by screwing the thread 8a of the stopper ring 4 into the thread 9a of the container body 1. During this screwing, the lip portion 28 of the plug packing 6 is gradually pressed against the inner diameter reduced portion 29 of the container body 1, and the mouth portion 3 is eventually sealed.

  Here, the positional relationship around the central axis C1 of the plug ring 4, the plug body 5, and the cap 7 at the beginning of the installation of the plug 2 is shown in FIG. 5A, and the plug packing 6 at this time is shown in FIG. 5B. Show. The positional relationship around the central axis C1 of the plug ring 4, the plug body 5, and the cap 7 is grasped from the positional relationship between the recess 15a of the plug ring 4, the first locking portion 11 of the plug body 5, and the finger hanging wall 26 of the cap 7. can do. When screwing is performed for a while from FIG. 5 (a), as shown in FIGS. 5 (c) and 5 (d), the lip portion 28 of the plug packing 6 starts to contact the inner diameter reduced portion 29. The frictional force between the parts 29 is weak. For this reason, the plug ring 4, the plug body 5, and the cap 7 are integrally rotated in the screwing direction, and the positional relationship among the first locking portion 11, the recess 15a, and the finger hanging wall 26 does not change. Since the plug main body 5 rotates in the screwing direction, the lip portion 28 of the plug packing 6 can be weakly deformed. Therefore, slight vibrations due to elastic repulsion of the plug packing 6 and vibrations transmitted to the hand may occur. When the screwing is further advanced, as shown in FIGS. 5 (e) and 5 (f), the lip portion 28 is strongly pressed, so that the frictional force between the lip portion 28 and the inner diameter reducing portion 29 is caused by the plug body 5 and the plug ring 4. The frictional force between the caps 7 is exceeded. For this reason, the plug main body 5 is rotated relative to the plug ring 4 and the cap 7 in the anti-screwing direction, and is not rotated in the screwing direction with respect to the inner diameter reducing portion 29, so The positions of the recess 15a and the finger hanging wall 26 in the circumferential direction are shifted. After this state, the torsional deformation of the lip portion 28 of the plug packing 6 cannot be restored. Therefore, when screwing the stopper 2 into the container body 1, vibration noise due to elastic repulsion of the stopper packing 6 and generation of unpleasant vibration transmitted to the hand performing the screwing operation of the stopper 2 can be suppressed. When the stopper 2 is removed from the container body 1, the stopper ring 4 is rotated reversely to be loosened. Also at this time, when the frictional force between the lip portion 28 and the inner diameter reduction portion 29 is strong at the beginning, the generation of vibration noise is suppressed.

  Hereinafter, other embodiments of the present invention will be described. In the following, only differences from the first embodiment will be described. The second embodiment shown in FIG. 6 is different in the structure for attaching the cap to the plug body. That is, an annular wall 42 that protrudes in the radial direction over the entire circumference is formed on the shaft portion 18 side of the cap, and a retaining portion 42 is formed on the opening 17 side of the plug body. For this reason, the slits 43 and 43 for making a bridge part in the stopper main body are formed.

  The third embodiment shown in FIG. 7 is different in the structure for attaching the cap to the plug body. That is, an annular wall 51 protruding in the radial direction over the entire circumference is formed on the shaft portion 18 side of the cap, and a retaining portion 52 is formed in the first locking portion 11 of the plug body. In this case, since the flexibility of the 1st latching | locking part 11 can be utilized, it is excellent at the point which does not need to make a slit only for the retaining part 52. In addition, even if the first locking portion 11 is bent toward the central axis side due to an impact such as when dropped, the resistance of the annular wall 51 prevents the first locking portion 11 from being unexpectedly removed.

  The fourth embodiment shown in FIG. 8 is different in the structure for attaching the cap to the plug body. That is, the pressure inlet 61 is formed at the center of the bottom wall of the opening of the plug body, and the protruding shaft 62 is formed at the center of the cap. The projecting shaft portion 62 has a spherical tip portion. When the spherical tip of the projecting shaft 62 is press-fitted from the central axis direction, the pressure inlet 61 is elastically recovered and prevents the spherical tip of the projecting shaft 62 from coming off. The spherical tip portion of the projecting shaft portion 62 that is press-fitted is similarly hooked in the central axis direction with respect to the pressure inlet portion 61 regardless of the circumferential direction. The pressure inlet portion 61 and the spherical tip portion of the projecting shaft portion 62 press-fitted therein function as a pivot bearing that rotatably supports the cap with respect to the plug body. In addition, as shown in a modified example in FIG. 9, it is also possible to form the projecting shaft portion 62 on the stopper body and the pressure inlet portion 61 on the cap. Further, as shown in FIG. 10, the pressure inlet portion 61 ′ and the head portion 62 ′ of the projecting shaft portion 62 can be conical.

  The fifth embodiment shown in FIG. 11 is different in the structure for attaching the plug body to the plug ring. That is, a bearing structure is employed in which the plug body is rotatably supported by the rolling element 71 with respect to the plug ring. For example, a ball can be adopted as the rolling element 71. A raceway surface 72 for the rolling element 71 is provided on the outer periphery of the stopper body on the outer periphery of the stopper body. A pocket portion 73 for holding the rolling elements 71 is provided on the inner periphery of the stopper ring. It is sufficient that the rolling elements 71 are provided at three or more locations in the circumferential direction. The rolling element 71, the raceway surface 72, and the pocket portion 73 function as a rolling bearing that supports the plug main body on both sides in the radial direction and the central axis direction with respect to the plug ring. The raceway surface 72 and the pocket portion 73 may be formed integrally with the plug main body and the plug ring as shown in the drawing, or may be made separately. A pocket part may be made in the stopper body, and a raceway surface may be made in the stopper ring. When a cage is used, a raceway surface may be formed on the stopper ring.

  For example, as shown in a modified example of the pocket portion in FIG. 12, the pocket portion can be divided into a receiving hole 73 ′ on the stopper ring side and a holding piece 80. In this case, half of the rolling element 71 is held by the receiving hole 73 ′, and the holding piece 80 is attached to the plug ring in this state. For this attachment, for example, a structure in which both the leg portions 82 of the holding piece 80 are pushed into the groove portion 83 of the plug ring from the radial direction can be adopted. The holding piece 80 attached to the stopper ring prevents the rolling element 71 from coming off by the pocket inner peripheral portion 81.

  Moreover, the pocket part should just hold | maintain the rolling element 71, and a pocket inner surface shape can be determined freely. For example, as shown in another modified example in FIG. 13, a flat surface 84 directed in the radial direction may be formed on the stopper ring, and a pocket inner peripheral portion 81 that abuts against the flat surface 84 may be formed on the holding piece 80. . The technical scope of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope of the technical idea based on the description of the scope of claims.

DESCRIPTION OF SYMBOLS 1 Container body 2 Plug 3 Mouth part 4 Plug ring 5 Plug body 6 Plug packing 7 Cap 8 Female thread part 9 Male thread part 8a, 9a Thread 10 Locking wall part 11 First locking part 12 Second locking part 15 Enclosure part 15a Recess 15b Receiving wall surface 17 Opening portion 18 Shaft portion 19 Annular wall 20 Retaining portion 24 Gutter portion 25 Non-rotating portion 26 Finger hanging wall C1 Central axis

Claims (6)

A plug ring provided with a thread, a plug main body attached to and detached from the plug ring, and a plug packing attached to and detached from the plug main body, the plug ring and the plug main body are configured to be disassembled,
In the stopper that is attached to the container body by screwing the thread of the stopper ring into the thread of the container body, and the stopper packing is pressed against the inner periphery of the mouth of the container body during the screwing,
The plug body is attached to the plug ring so as to be rotatable about a central axis of the screw thread,
The plug ring has a locking wall portion protruding toward the central axis over the inner periphery,
The plug body has a first locking portion that is hooked on the locking wall portion from one side in the central axis direction, and a second locking portion that is hooked on the locking wall portion from the other side in the central axis direction,
The first locking portion is flexible so that the locking wall portion can be overcome while the plug body and the plug ring are combined in the central axis direction . The plug ring has a surrounding portion radially opposed to the first locking portion caught on the locking wall portion,
The inner diameter of the enclosure is a plug according to claim 1 which is greater as it gets farther away toward the one side from the central axis other side from the engaging wall portion. A cap that is attached to and detached from the plug body;
The plug body has an opening facing the cap in the central axis direction,
The cap has a shaft portion that is inserted into the opening from a central axis direction, a flange portion that covers the plug ring, and a rotation stopper portion that engages the plug ring in a rotation direction around the central axis.
An annular wall protruding in a radial direction over the entire circumference is formed in one of the opening and the shaft, and a retaining portion that is hooked in the central axis direction with respect to the annular wall is formed in the other. Item 3. The stopper according to item 1 or 2 . The retaining portion is composed of two protrusions formed in two equal intervals around the central axis,
The stopper according to claim 3 , wherein the flange includes a finger-hanging wall that protrudes radially outward from the stopper ring with a position that differs by 90 ° around the central axis relative to the retaining part as a circumferential center. . When the center axis of orientation of the cap relative to the plug ring is out of the predetermined range, prior to the retaining portion rides over the annular wall, according to claim 3 in which the cap is received in the central axis direction by the stopper ring Or the stopper of 4 . A food and drink container comprising the stopper according to any one of claims 1 to 5 and the container body.

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