JP5298348B2 - A synthetic resin lid and a container composed of the lid and the container body - Google Patents

Description

  The present invention is provided with a lid formed from a synthetic resin and a container composed of such a lid and a container body, and more specifically, a tamper-evidence characteristic that clearly shows the fact once the mouth and neck of the container is opened. The present invention relates to a lid and a container including a lid and a container body.

  As a beverage container, a container composed of a combination of an appropriate synthetic resin such as polyethylene terephthalate, a container body formed of glass or a metal thin plate, and a lid formed of a synthetic resin is widely used in practical use. The container has a cylindrical mouth and neck portion, and a male thread is formed on the outer peripheral surface of the mouth and neck portion. The lid has a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a female thread is formed on the inner peripheral surface of the skirt wall. The container lid is attached to the mouth and neck by fitting the lid on the mouth and neck of the container, rotating the lid in the closing direction, and screwing the female thread of the lid onto the male thread of the mouth and neck. The part is sealed. When opening the mouth and neck, the lid is rotated in the opening direction to release the screw of the female thread of the lid with respect to the male thread of the mouth and neck, and the lid is detached from the mouth and neck.

  Thus, the container of the above-described form has a so-called tamper-evidence characteristic in which such a fact is clearly shown when the lid is rotated in the open direction by mischief and the sealing of the mouth and neck is released. It is important that In a typical technique for imparting tamper-evidence characteristics to a container, a locking jaw is formed on the outer peripheral surface of the mouth and neck of the container body, which is positioned below the male thread, and is formed around the skirt wall of the lid. Forming a breakable line extending in the direction, and dividing the skirt wall into a main portion above the breakable line and a tamper evidence hem below the skirt wall, and the above-mentioned engagement on the inner peripheral surface of the tamper evidence skirt. A locking means for cooperating with the stop jaw is formed. When the lid is attached to the mouth / neck portion of the container body as required, the lid locking means is locked to the locking jaw portion of the mouth / neck portion. When the lid is rotated in the opening direction, the lid is raised along with the rotation by moving the female thread of the lid along the male thread of the mouth and neck. However, the tamper-evident hem is prevented from rising because the locking means formed on the inner peripheral surface of the tamper-evident is locked to the locking jaw of the mouth-neck, thereby causing stress to the breakable line. Is generated to break the breakable line, thus indicating that the lid has been rotated in the opening direction.

  However, in the provision of the tamper evidence characteristics by the above-described typical technique, it is particularly necessary to dispose the tamper evidence hem at the lower part of the skirt wall of the lid and to form the locking means on the inner peripheral surface thereof. Because of this, the amount of synthetic resin required to manufacture the lid is relatively large, it is difficult to sufficiently reduce the manufacturing cost, and the overall height of the lid is relatively large. The height of the mouth and neck of the main body also becomes relatively large, and it is difficult to reduce the manufacturing cost from this point.

  As techniques for solving the above-described problems in the above typical technique, Patent Documents 1, 2 and 3 below relate an appropriate part of the mouth and neck of the container body and an appropriate part of the lid to each other, for example, by welding. It has been proposed to stop. When the lid is rotated in the opening direction, the interlock between the mouth neck of the container body and the lid is released, or the breakable line formed on the lid is broken, and thus the lid is rotated in the opening direction. Is specified.

Japanese Utility Model Publication No. 61-169046 JP 2002-302133 A International Publication WO2005 / 085077

  According to the experience of the present inventors, the techniques disclosed in Patent Documents 1, 2, and 3 described above include (1) torque that must be applied to the lid when opening the mouth and neck of the container body, particularly The initial torque when the lid is rotated in the opening direction is considerably large, and the opening operation is particularly difficult for women or children, and / or (2) a trace indicating that the lid has been rotated in the opening direction, that is, the container body There is a problem to be solved that the release of the interlocking between the mouth neck and the lid is not clearly displayed and the tamper evidence characteristics are insufficient. The reason why the initial torque when the lid is rotated in the opening direction is excessive is that the required sealing part is in close contact with the mouth and neck of the container body, together with the necessary torque to start the rotation with respect to the mouth and neck. This is because both the necessary torque for releasing the mutual locking between the mouth neck of the container body and the lid are required at the beginning of the rotation at the same time.

  In view of this fact, the present inventors previously described in Japanese Patent Application No. 2009-137141 that the amount of synthetic resin required for manufacturing the lid is sufficiently reduced and the total height of the lid (and the mouth and neck of the container body). In addition to being able to reduce the height), the torque required to open the mouth and neck of the container body can be brought to an appropriate value, and also when the lid is rotated in the opening direction Provided a new and improved synthetic resin lid and a container composed of a combination of the lid and the container body, in which such facts are clearly displayed.

  The lid previously proposed by the present inventors has a top wall formed of a synthetic resin and a cylindrical skirt wall that hangs down from the periphery of the top wall. A female thread is formed on the inner peripheral surface of the skirt wall. A lid flange is formed on the outer peripheral surface of the skirt wall, and the lid flange has a plurality of extensions extending from the lower end portion of the outer peripheral surface of the skirt wall at intervals in the circumferential direction. A connecting base portion connected to the lower end portion of the outer peripheral surface of the skirt wall, the connecting base portion having an easily accessible connecting piece connecting the extending piece and the adjacent extending piece; A first circumferentially extending portion extending in one circumferential direction from the second circumferential direction and a second circumferential direction extending in the other circumferential direction connected to the first circumferentially extending portion via a connecting portion extending in the radial direction An extension part and an extension end part are included. Further, the container previously proposed by the present inventors is composed of a container body having a cylindrical mouth and neck portion together with the lid, and the female body of the lid is disposed on the outer peripheral surface of the mouth neck portion of the container body. In a container in which a male thread cooperating with the thread is formed, an outer peripheral surface of the mouth neck portion of the container body has a mouth neck flange extending radially outward below the male thread. A plurality of locking means protruding upward are formed at intervals in the circumferential direction on the upper surface of the mouth-and-neck flange, and the mouth-and-neck portion of the container body is covered by the lid When sealing, the lid is fitted on the mouth and neck of the container body, the lid is rotated relative to the mouth and neck in the closing direction, and the female thread is attached to the male thread. The lid is attached to the mouth-neck portion of the container body by screwing, and thus the extension end of each of the extension pieces of the lid flange is connected to the mouth-neck. The flange is positioned opposite to each of the locked means, and then the extended end is locked to the locked means by heating the extended end, and the container body When opening the mouth and neck, by rotating the lid in the opening direction with respect to the mouth and neck, the easily breakable connecting piece of the lid flange is broken and the extending piece is deformed. The extended end of each of the extended pieces of the lid flange is displaced downward relative to the lower end of the skirt wall, and thereafter from the locked means of the mouth-and-neck flange to the lid flange The extended end of the extended piece is detached and / or the extended piece is broken.

  However, as a result of further investigations on the lid and container previously proposed by the present inventors, the portion of the lid flange located on the radially outer side, that is, the second circumferentially extending portion and the extending end portion. It has been found that the support is not always sufficient, and the radially outer portion of the lid flange is deformed during transportation or transportation of the lid, and the easily breakable connecting piece is broken in some cases.

  The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is to further improve the lid and container previously proposed by the present inventors, and to improve the radius of the lid flange during transport or transportation of the lid. It is to prevent or avoid as much as possible that the outer portion in the direction is deformed and the breakable connecting piece is broken in some cases.

  As a result of further studies, the present inventors have achieved the main technical problem described above by adding a reinforcing portion that connects the connecting base portion and the extending end portion to each of the extending pieces of the lid flange. I found that I can do it.

That is, according to one aspect of the present invention, the lid for achieving the main technical problem has a top wall formed of a synthetic resin and a cylindrical skirt wall depending from the periphery of the top wall, and the skirt wall In the lid on which an internal thread is formed on the inner peripheral surface of
A lid flange is formed on the outer peripheral surface of the skirt wall, and the lid flange is adjacent to a plurality of extending pieces extending from the lower end portion of the outer peripheral surface of the skirt wall at intervals in the circumferential direction. Having an easily breakable connecting piece connecting the extending piece,
Each of the extension pieces is a connection base connected to the lower end of the outer peripheral surface of the skirt wall, a first circumferential extension extending from the connection base in one circumferential direction, and a connection extending in the radial direction. In addition to the second circumferentially extending portion and the extending end portion that are connected to the first circumferentially extending portion and extend in the other circumferential direction via the portion, the connection base portion and the extending end portion Including reinforcements connecting the,
A lid characterized by this is provided.

According to another aspect of the present invention, the container for achieving the main technical problem is composed of the lid and a container body having a cylindrical mouth and neck, and the outer peripheral surface of the mouth and neck of the container body In a container in which a male thread that cooperates with the female thread of the lid is formed,
On the outer peripheral surface of the mouth / neck portion of the container main body, a mouth / neck flange extending radially outward is formed below the male thread, and the upper surface of the mouth / neck flange protrudes upward. A plurality of locked means are formed at intervals in the circumferential direction,
When sealing the mouth and neck of the container body with the lid, the lid is fitted on the mouth and neck of the container body, and the lid is rotated relative to the mouth and neck in the closing direction. The lid is attached to the mouth-neck portion of the container body by screwing the female thread into the male thread, and thus the extending end of each of the extending pieces of the lid flange is attached. The reinforcing portion is ruptured by being positioned to face each of the locked means of the mouth-and-neck flange, and then pressing the extended end portion against the locked means and heating. The extended end is locked to the locked means;
When opening the mouth-and-neck portion of the container body, the easily breakable connecting piece of the lid flange is broken by rotating the lid in the opening direction with respect to the mouth-and-neck portion, and then the extension A piece is deformed so that the extended end of each of the extended pieces of the lid flange is displaced downward relative to the lower end of the skirt wall, and then the locked portion of the mouth-and-neck flange The extension end of the extension piece of the lid flange is removed from the means and / or the extension piece is broken;
A container is provided.

  Preferably, the extended end portion of each of the extended pieces of the lid flange is positioned radially outwardly in alignment with the connection base portion in the circumferential direction, and the reinforcing portion extends in the radial direction. The width of the extended end portion of each of the extended pieces of the lid flange is greater than the width of the first circumferentially extending portion, the connecting portion, the second circumferentially extending portion, and the reinforcing portion. Larger is preferred. The cross-sectional area of the reinforcing portion of each of the extension pieces of the lid flange is the connection base, the first circumferential extension, the connection, the second circumferential extension, and the extension end. It is preferably smaller than the cross-sectional area of the part. Preferably, the first circumferentially extending portion of each of the extending pieces of the lid flange extends in an opening direction that is a rotation direction of the lid when the mouth and neck portion of the container body is opened. The second circumferentially extending portion extends in the closing direction, which is the rotation direction of the lid when the lid is attached to the mouth and neck of the container body and the mouth and neck are sealed up to the extending end. Conveniently, the easily breakable connecting piece of the lid flange connects the extending end of the extending piece and the connecting portion of the adjacent extending piece. Preferably, an ultrasonic wave is oscillated by pressing a horn of an ultrasonic welder against the extension end of each of the extension pieces of the lid flange, thereby causing the extension pieces of the extension pieces of the lid flange to oscillate. The locking end is pressed against the locked means and heated. Conveniently, the container body is formed from a synthetic resin different from the synthetic resin forming the lid.

  According to the present invention, the effect of the lid and container previously proposed by the present inventors, i.e., it is not necessary to attach a tamper evidence skirt to the skirt wall of the lid and form a locking means on the inner peripheral surface thereof. The amount of synthetic resin required for manufacturing the lid can be reduced sufficiently and the overall height of the lid (and the height of the mouth and neck of the container body) can be reduced, and in addition, the initial stage of rotating the lid in the opening direction In this case, the extension end of the lid flange is not detached from the locking means of the mouth and neck flange, and the extension end of the lid flange from the mouth and neck flange is separated from the mouth and neck of the container body. It is performed after the lid has been rotated to some extent, and therefore it can be avoided that the initial torque required to rotate the lid in the opening direction is excessive, and it is necessary to open the mouth and neck of the container body. Torque can be set to an appropriate value, In addition, when the lid is rotated in the direction of rotation, the easily breakable connecting piece of the lid flange is broken, thus clearly indicating that the lid has been rotated in the opening direction. It is possible to prevent or avoid as much as possible that the radially outer portion of the lid flange is deformed during transportation or transportation, and the easily breakable connecting piece is broken in some cases.

The slope view which shows the mouth neck part and lid | cover of a container main body in the container comprised according to this invention in the state before mounting | wearing a mouth neck part with a lid | cover. The front view which shows a part of mouth neck shown in FIG. 1 in a cross section. The top view of the mouth neck part shown in FIG. The front view which shows a part of cover shown in FIG. 1 in cross section. The top view of the lid | cover shown in FIG. FIG. 2 is a front view partially showing a state in which the lid shown in FIG. 1 is attached to the mouth and neck shown in FIG. (A) and (b) respectively show the behavior of the extending end and the reinforcing portion of the extending piece of the lid flange and the lid flange when the lid shown in FIG. 1 is attached to the mouth and neck shown in FIG. The expanded fragmentary sectional view which shows the mutual latching relationship of the extension end part of an extension piece, and the to-be-latched means of a mouth neck part flange. (A), (b) and (c) are front views showing a state change when the lid is gradually rotated in the opening direction from the state shown in FIG. FIG. 7 is a perspective view showing a state in which the lid is attached to the mouth and neck again after the lid is rotated in the opening direction from the state shown in FIG. 6 and detached from the mouth and neck.

  FIG. 1 shows a mouth and neck portion 2 of a container body and a lid 4 applied to the mouth and neck portion 2 in a preferred embodiment of a container constructed according to the present invention.

  Referring to FIGS. 2 and 3 together with FIG. 1, the illustrated container body, which is advantageously formed from a suitable synthetic resin such as polyethylene terephthalate, has a mouth-and-neck portion 2 that is generally cylindrical. Have. A male thread 6 is formed on the outer peripheral surface of the mouth-and-neck portion 2. The male screw 6 is formed with ventilation notches 8 in a plurality of regions spaced in the circumferential direction, and in the illustrated embodiment, four regions. On the outer peripheral surface of the mouth-and-neck portion 4 is further formed a mouth-and-neck flange 10 extending radially outwardly below the male thread 6. It is important that a plurality of protruding means, that is, eight locked means 12a to 12h in the illustrated embodiment, are formed at intervals in the circumferential direction. In the illustrated embodiment, the mouth-and-neck flange 10 has an annular plate shape, and its outer peripheral portion is made somewhat thinner than its inner peripheral portion. The boundary region between the upper surface and the side surface and the boundary region between the side surface and the lower surface of the mouth-and-neck flange 10 are arcuate in the cross-sectional view. Each of the locked means 12a to 12h is formed of a plurality of protrusions extending on the outer periphery of the mouth-and-neck flange 10 and extending in the vertical direction in FIG. . More specifically, the locked means 12a and 12e are constituted by five protrusions, and the locked means 12b, 12d, 12f and 12h are constituted by three protrusions, and the locked means 12c and 12g. Consists of two protrusions. The container body including the mouth / neck portion 2 is conveniently formed using a forming die composed of a split member that is divided in the vertical direction in FIG. 3, but a protruding shape that constitutes the locked means 12a to 12h. 3 is a form extending in the vertical direction in FIG. 3, so that the so-called forcible punching is not generated when the container body is punched from the mold due to the arrangement of the locked means 12a to 12h. . On the upper surface of the mouth-and-neck flange 10, a substantially triangular recess 14 is formed on the outer peripheral edge of the upper surface corresponding to the angular position of the upper end of the male screw 6.

  4 and 5 together with FIG. 1, the container body can be formed from the same synthetic resin as the container body. The lid 4, which is advantageously formed from a different synthetic resin, for example a suitable synthetic resin such as polypropylene or polyethylene, has a circular top wall 16 and a cylindrical skirt wall 18 depending from the periphery of the top wall 16. Have Two cylindrical seal pieces extending downward, that is, an outer cylindrical seal piece 20 and an inner cylindrical seal piece 22 are disposed on the outer peripheral edge of the inner surface of the top wall 16. Furthermore, a plurality of protrusions 24 extending in the radial direction are formed in the central region on the inner surface of the top wall 16 (Fig. 4 shows three protrusions 24 shown in FIG. 4). ) A female thread 26 is formed on the inner peripheral surface of the skirt wall 18. The female thread 26 is formed with ventilation notches 28 in a plurality of regions spaced in the circumferential direction. In the region from the outer peripheral edge of the top surface wall 16 to the lower end of the outer peripheral surface of the skirt wall 18, a large number of projections and depressions 30 are formed for preventing the slipping of the fingers hung thereon.

  4 and 5 together with FIG. 1, it is important that the outer peripheral surface of the skirt wall 18 is formed with a lid flange 32 extending radially outward from its lower end. . In the illustrated embodiment, the lid flange 32 is generally in the shape of an annular plate, and a plurality of, in the illustrated case, eight are extended from the lower end of the skirt wall 18 at equal intervals in the circumferential direction. A piece 34 is included. Each of the extending pieces 34 has a connection base 36 connected to the outer peripheral surface of the skirt wall 18, and an opening direction (counterclockwise in FIG. 5) from the connection base 36, that is, as described later. A first circumferentially extending portion 38 extending in an arc shape in the rotational direction of the lid 4 when the neck 2 is opened, and extending radially outward from the extending end of the first circumferentially extending portion 38. The connecting portion 40 is closed from the extending end of the connecting portion 40 (clockwise in FIG. 5), that is, as described later, the lid 4 is attached to the mouth neck portion 2 of the container body to seal the mouth neck portion 2. The second circumferentially extending portion 42 extending in an arc shape in the rotating direction of the lid 4 and the extending end of the second circumferentially extending portion 42 further extending in an arc shape in the closing direction An exit end 44 is provided. The extended end 44 of each of the extended pieces 34 is positioned in alignment with the connection base 36 in the circumferential direction. In other words, the connection base portion 36 and the extension end portion 44 in each of the extension pieces 34 are positioned in the same angle region. As clearly understood by referring to FIGS. 1 and 5, the width of the connection base 36 and the extension end 44 in each of the extension pieces 34 is the other portion, that is, the first circumferential extension 38, The width of the connecting portion 40 and the second circumferentially extending portion 42 is made larger. In each of the extended pieces 34, the thickness of the connection base 36, the first circumferential extension 38, and the connection 40 is greater than the thickness of the second circumferential extension 42 and the extension end 44. Is set somewhat smaller.

  In the lid 4 configured in accordance with the present invention, it is important that each of the extending pieces 34 is also provided with a reinforcing portion 45 that connects the connecting base portion 36 and the extending end portion 44. In the illustrated embodiment, as described above, the extended end portion 44 is positioned radially outward in alignment with the connection base portion 36 in the circumferential direction, and the reinforcing portion 45 extends in the radial direction therebetween. . By connecting the extended end portion 44 to the connection base portion 36 via the reinforcing portion 45, the second circumferentially extending portion 42 and the extended end portion 44 are connected to the connecting portion 40 and the reinforcing portion in each of the extending pieces 34. 45, and thus connected to and supported by the connection base 36 and the first circumferential extension 38 at two portions spaced in the circumferential direction, and thus the extended end of the lid 4 during transportation or transportation. The deformation of the portion 44 and the second circumferentially extending portion 42 is sufficiently suppressed. The cross-sectional area of the reinforcing portion 45 is smaller than the cross-sectional areas of the connecting base portion 36, the first circumferentially extending portion 38, the connecting portion 40, and the second circumferentially extending portion 42, and the breaking strength of the reinforcing portion 45 is relatively high. Small is convenient.

  The lid flange 32 further includes a plurality of, in the illustrated case, eight easily breakable connecting pieces 46 for connecting the extending pieces 34 in sequence (in other words, connecting the adjacent extending pieces 34). It is out. In the illustrated embodiment, the easily breakable connecting piece 46 connects one extending end 44 of the adjacent extending piece 34 and the connecting portion 40. The cross-sectional area of the easily breakable connecting piece 46 is sufficiently small, and the breaking strength of the easily breakable connecting piece 46 is relatively small.

  The description will be continued with reference to FIG. 1 and FIG. 6, and after filling the container body 1 with a content such as a soft drink, the mouth and neck part 2 of the container body is attached with a lid 4 to seal the mouth and neck part 2. In this case, the lid 4 is fitted on the mouth-and-neck portion 2 and the lid 4 is rotated in the closing direction, that is, clockwise when viewed from above in FIG. The female thread 26 is screwed together. The lid 4 is moved downward with the rotation in the closing direction, and when the female thread 26 is sufficiently screwed to the male thread 6 with a required torque, the top wall of the lid 4 is clearly shown in FIG. The outer cylindrical seal piece 20 and the inner cylindrical seal piece 22 formed on the inner surface of 16 are brought into close contact with the outer peripheral surface and the inner peripheral surface of the mouth-and-neck portion 2 to seal the mouth-and-neck portion 2. Further, as clearly shown in FIG. 7 (a), each extended end 44 of the extended piece 34 of the lid flange 32 faces each of the locked means 12a to 12h of the mouth / neck flange 10. The extended end portion 44 of each extended piece 34 is brought into contact with or close to each of the locked means 12a to 12h.

  Thereafter, as shown in FIG. 7B, each extended end 44 of the extended piece 34 is pressed against each of the locked means 12 a to 12 h of the mouth-and-neck flange 10 and heated. Such pressing and heating are performed at the eight protruding pieces 48 (FIG. 7A) that are disposed at the leading ends of the horns of the ultrasonic welder and are located corresponding to the extended end portions 44 of the extended pieces 34. This can be conveniently performed by oscillating the ultrasonic wave while forcing downward the abutment of each projecting piece 48 (only one projecting piece 48 is shown) against each extending end 44 of the extending piece 34. . Then, as shown in FIG. 7A, the extended end portion 44 is softened or melted and displaced somewhat downward, whereby the reinforcing portion 45 in each of the extended pieces 34 is broken. The extended end portion 44 of each of the extended pieces 34 is deformed so as to partially wrap the plurality of protrusions constituting the locked means 12a to 12h, and each extended piece 34 is extended. The end 44 is locked to the locked means 12a to 12h. When each extended end 44 of the extended piece 34 is softened or melted, the extended end 44 can be welded to the locked means 12a to 12h. Generally, the synthetic resin forming the lid 4 is used. When the synthetic resin forming the container body is different, the welding strength is remarkably small even if the welding is generated. On the other hand, when the synthetic resin forming the lid 4 and the synthetic resin forming the container body are substantially the same or similar, each of the extended pieces 34 and the locked means 12a The welding with 12 to 12 h becomes relatively strong. In this case, the extension end portion 44 of the extension piece 34 and the locked means 12a to 12h are locked between the two without deforming each extension end portion 44 of the extension piece 34. It is also possible to rely only on welding.

  When the mouth and neck 2 of the container body is opened to consume the container contents, the lid 4 is rotated in the opening direction, that is, counterclockwise as viewed from above in FIG. When the lid 4 is rotated in the opening direction with respect to the mouth-and-neck portion 2 of the container body, the connection base 36 in each of the extending pieces 34 of the lid flange 32 is moved in the opening direction in association with the rotation of the lid 4. . On the other hand, since the extended end portion 44 is locked by the locked means 12a to 12h of the mouth-and-neck flange 10, movement in the opening direction is prevented. When the lid 4 is rotated in the opening direction to the position shown in FIG. 8 (a), each of the extended piece 34 and the easily breakable connecting piece 46 of the lid flange 32 is elastically slightly stretched and then extended. The first circumferentially extending portion 38 and the second circumferentially extending portion 42 in each of the protruding pieces 34 are inclined downward and upward in the opening direction, respectively. When the rotation of the lid 4 in the opening direction further proceeds, as shown in FIG. 8B, the easily breakable connecting piece 46 in the lid flange 32 is broken, and the first circumferential direction in each of the extending pieces 34 is also obtained. The inclination of the extension part 38 and the second circumferential extension part 42 is increased, and the first circumferential extension part 38 is also inclined upward in the opening direction. When the rotation of the lid 4 in the opening direction further proceeds, as shown in FIG. 8C, the extended end portions 44 of the extended pieces 34 of the lid flange 32 are engaged with the locking means of the mouth-and-neck flange 10. Detach from 12a to 12h. Thus, the inclination of the first circumferential extension 38 and the second circumferential extension 42 in each of the extension pieces 34 of the lid flange 32 is reduced by elastic restoration, and the first circumferential extension The exit portion 38 returns to the state of being inclined downward in the opening direction (see FIG. 9). After the extended end portion 44 of each of the extended pieces 34 of the lid flange 32 is detached from the locked means 12a to 12h of the mouth-and-neck flange 10, the lid 4 is rotated according to the rotation of the lid 4 in the opening direction. 4 is raised, the lid 4 is detached from the mouth neck 2 and the mouth neck 2 is opened. The breakage of the easily breakable connecting piece 46 of the lid flange 32 is not performed simultaneously with the start of the rotation of the lid 4 in the opening direction, but at the time when the rotation of the lid 4 in the opening direction has progressed to some extent. The extended end 44 of each of the protruding pieces 34 is detached from the locked means 12a to 12h of the mouth-and-neck flange 10 when the rotation of the lid 4 in the opening direction further proceeds. Therefore, when the lid 4 starts to rotate in the opening direction, when the easily breakable connecting piece 46 of the lid flange 32 is broken, and when the lid flange from the locked means 12a to 12h of the mouth-and-neck flange 10 is provided. The torque to be applied to the lid 4 does not become excessive when the extended end portion 44 of each of the 32 extended pieces 34 is detached. In the lid 4 detached from the mouth-and-neck portion 2 of the container body, each easily breakable connecting piece 46 in the lid flange 32 is broken and the extension of the lid flange 32 is clearly shown in FIG. The first circumferentially extending portion 36 and the second circumferentially extending portion 40 of each of the pieces 34 are deformed not to extend horizontally but to extend in an inclined manner, and therefore the lid 4 Is rotated in the opening direction to clearly show that the mouth-neck portion 2 of the container body is opened.

  In the illustrated embodiment, during the opening operation of the mouth and neck portion 2, the extended end portion 44 of each of the extending pieces 34 of the lid flange 32 is detached from the locked means 12 a to 12 h of the mouth and neck portion flange 10. However, if desired, the locking between the extended end portion 44 of the extending piece 34 and the locked means 12a to 12h is made relatively strong, and an easily breakable portion of the connecting piece 40 of the extending piece 34, for example, is provided. Instead of the extended end 44 of each of the extended pieces 34 of the lid flange 32 being detached from the locked means 12a to 12h of the mouth-and-neck flange 10, the extended pieces 34 are broken. It can also be configured to be.

  If it is desired to temporarily seal the mouth-and-neck part 2 with some contents in the container body remaining, the lid 4 is again fitted on the mouth-and-neck part 2 as shown in FIG. The lid 4 is rotated in the closing direction so that the female thread 26 of the lid 4 is screwed into the male thread 6 of the mouth-and-neck portion 2 as required, and thus the outside formed on the inner surface of the top wall 16 of the lid 4. The cylindrical seal piece 20 and the inner cylindrical seal piece 22 may be brought into close contact with the outer peripheral surface and the inner peripheral surface of the mouth-and-neck portion 2, respectively.

2: mouth neck of container body 4: lid 6: male thread 10: mouth neck flange 12a to 12h: locked means 16: top wall 18: skirt wall 26: female thread 32: lid flange 34: extension Outlet 36: Connection base 38: First circumferential extension 40: Connection 42: Second circumferential extension 44: Extension end 45: Reinforcement 46: Easily breakable connection 48: Ultrasonic Projection formed on the horn of the welder

Claims (9)

In a lid formed of a synthetic resin and having a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a female thread is formed on the inner peripheral surface of the skirt wall,
A lid flange is formed on the outer peripheral surface of the skirt wall, and the lid flange is adjacent to a plurality of extending pieces extending from the lower end portion of the outer peripheral surface of the skirt wall at intervals in the circumferential direction. Having an easily breakable connecting piece connecting the extending piece,
Each of the extension pieces is a connection base connected to the lower end of the outer peripheral surface of the skirt wall, a first circumferential extension extending from the connection base in one circumferential direction, and a connection extending in the radial direction. In addition to the second circumferentially extending portion and the extending end portion that are connected to the first circumferentially extending portion and extend in the other circumferential direction via the portion, the connection base portion and the extending end portion Including reinforcements connecting the,
A lid characterized by that.   The extension end of each of the extension pieces of the lid flange is positioned radially outwardly in alignment with the connection base in the circumferential direction, and the reinforcing portion extends in the radial direction. The described lid.   The width of the extending end of each of the extending pieces of the lid flange is the radial width of the first circumferentially extending portion, the connecting portion, the second circumferentially extending portion, and the reinforcing portion. The lid according to claim 1 or 2, which is larger than the lid.   The cross-sectional area of the reinforcing portion of each of the extension pieces of the lid flange is the connection base, the first circumferential extension, the connection, the second circumferential extension, and the extension end. The lid | cover in any one of Claims 1 thru | or 3 smaller than the cross-sectional area of a part.   The first circumferentially extending portion of each of the extending pieces of the lid flange extends in the opening direction, which is the rotational direction of the lid when opening the mouth neck of the container body, and the second circumferential direction The extension part extends in a closing direction that is a rotation direction of the lid when the lid is attached to the mouth and neck part of the container body to seal the mouth and neck part to the extension end part. The lid according to any one of the above.   The easily breakable connecting piece of the lid flange connects the extending end of the extending piece and the connecting portion of the extending piece adjacent to the extending piece. lid. A container body having a cylindrical mouth-neck portion and the lid according to any one of claims 1 to 5, wherein the female thread of the lid is formed on the outer peripheral surface of the mouth-neck portion of the container body. In a container in which a cooperating male thread is formed,
On the outer peripheral surface of the mouth / neck portion of the container main body, a mouth / neck flange extending radially outward is formed below the male thread, and the upper surface of the mouth / neck flange protrudes upward. A plurality of locked means are formed at intervals in the circumferential direction,
When sealing the mouth and neck of the container body with the lid, the lid is fitted on the mouth and neck of the container body, and the lid is rotated relative to the mouth and neck in the closing direction. The lid is attached to the mouth-neck portion of the container body by screwing the female thread into the male thread, and thus the extending end of each of the extending pieces of the lid flange is attached. The reinforcing portion is ruptured by being positioned to face each of the locked means of the mouth-and-neck flange, and then pressing the extended end portion against the locked means and heating. The extended end is locked to the locked means;
When opening the mouth-and-neck portion of the container body, the easily breakable connecting piece of the lid flange is broken by rotating the lid in the opening direction with respect to the mouth-and-neck portion, and the extending piece Is deformed so that the extended end of each of the extended pieces of the lid flange is displaced downward relative to the lower end of the skirt wall, and then the locked means of the mouth-and-neck flange The extension end of the extension piece of the lid flange is removed from and / or the extension piece is broken,
A container characterized by that.   The locking end of each of the extended pieces of the lid flange is oscillated by pressing the horn of an ultrasonic welder against the extended end of each of the extended pieces of the lid flange. The container according to claim 7, wherein the portion is pressed against the locked means and heated.   The container according to claim 6, wherein the container body is made of a synthetic resin different from the synthetic resin forming the lid.

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