JP3613714B2 - Combination of container and lid - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a container and a lid that have tamper evidence characteristics (characteristics in which when a mischief such as opening a container and mixing foreign matter into the contents is added, a trace of such mischief is clearly indicated) And the combination.
[0002]
[Prior art]
In the combination of containers and lids that contain food and drink, etc., tamper evidence characteristics are often required, and various combinations of containers and lids having tamper evidence characteristics have been proposed and put to practical use. It is offered to.
[0003]
As a first typical example of a combination of a container having a tamper-evidence characteristic and a lid, a form disclosed in Japanese Examined Patent Publication No. 62-18420 can be given. A container that can be formed from an appropriate synthetic resin or glass such as polyethylene terephthalate has a cylindrical mouth-neck portion, and an outer thread on the outer peripheral surface of the mouth-neck portion and an annular locking jaw positioned therebelow. The part is formed. A lid, which can be formed from a suitable synthetic resin such as polyethylene or polypropylene, has a top wall and a cylindrical skirt wall depending from the top wall. A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is divided into a main portion above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line. Yes. The circumferential weakening line is composed of a plurality of slits extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridging portions that remain between the slits, and the tamper evidence skirt is composed of a plurality of bridging portions. It is connected to the main part through the part. On the inner peripheral surface of the main part, a female thread that is screwed onto the male thread formed on the mouth and neck is formed. A plurality of locking pieces are formed on the inner peripheral surface of the tamper evidence skirt at intervals in the circumferential direction.
[0004]
In such a combination, a lid is fitted on the mouth and neck of the container, and the lid is rotated in the required closing rotation direction to form a female thread formed on the skirt wall of the lid on the mouth and neck of the container. The cap is attached to the mouth and neck of the container by screwing the male thread. The locking piece formed on the tamper-evidence hem of the lid is elastically deformed or displaced and passes through the locking jaw of the mouth and neck. It is locked to the lower surface. When the lid is attached to the mouth and neck of the container as required, the sealing means disposed on the inner surface of the top wall of the lid is brought into close contact with the upper end of the mouth and neck to seal the mouth and neck. When opening the mouth neck of the container, the container lid is rotated in the opening rotation direction. Thus, since the female thread formed on the skirt wall of the lid is moved along the male thread formed on the mouth-and-neck portion, the lid is moved upward with rotation. However, the tamper-evident hem of the lid cannot move upward because the locking piece formed on the inner peripheral surface of the lid is locked to the locking jaw of the mouth-neck, and therefore the circumferential A considerable amount of stress is generated in the bridge portion in the direction weakening line, and thereby all or at least most of the bridge portion is broken (if a part of the bridge portion is left without being broken, The tamper-evidence skirt is broken in the axial direction and developed from an endless annular shape to an end-band shape). After that, leave the tamper evidence hem at the mouth and neck and leave the other part of the lid (if all of the bridging part is broken and the tamper evidence hem is completely separated from the main part) or tamper The entire lid, including the evidence hem, is removed from the mouth and neck, and the mouth and neck are opened.
[0005]
As a second typical example of a combination of a container having a tamper evident characteristic and a lid, there can be mentioned a form disclosed in Japanese Utility Model Laid-Open No. 56-131362. A container that can be formed from an appropriate synthetic resin or glass has a cylindrical mouth and neck portion, and a plurality of ratchet claws are formed on the outer peripheral surface of the mouth and neck portion at intervals in the circumferential direction. . Each ratchet claw is abruptly inclined with the front surface extending gently and outwardly in the radial direction toward the rear, as seen in the direction of rotation of the mouth and neck relative to the lid when the lid is attached to the mouth and neck. And a rear surface extending. The lid, which can be formed from a suitable synthetic resin, has a top wall and a cylindrical skirt wall depending from the top wall. A circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is divided into a main portion above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line. Yes. The circumferential weakening line is composed of a plurality of slits extending in the circumferential direction at intervals in the circumferential direction and a plurality of bridging portions that remain between the slits, and the tamper evidence skirt is composed of a plurality of bridging portions. It is connected to the main part through the part. On the inner peripheral surface of the main part, a female thread that is screwed onto the male thread formed on the mouth and neck is formed. A plurality of ratchet pieces are formed on the inner peripheral surface of the tamper evidence skirt at intervals in the circumferential direction. Each of the ratchet pieces has a front surface and an abruptly extending slantingly outwardly in the radial direction when viewed in the relative rotation direction of the lid with respect to the mouth and neck when the lid is attached to the mouth and neck. And a rear surface extending in an inclined manner.
[0006]
Even in such a combination, the lid is fitted on the mouth and neck of the container, the lid is rotated in the required closing rotation direction, and the female thread formed on the skirt wall of the lid is formed on the mouth and neck of the container. The cap is attached to the mouth and neck of the container by screwing the male thread. The ratchet piece formed at the tamper-evidence hem of the lid is elastically displaced by the fact that the gently inclined front surface cooperates with the gently inclined front surface of the ratchet piece formed at the mouth and neck. Or it is deformed and it moves over the ratchet piece of the mouth and neck and moves in the circumferential direction. When the lid is attached to the mouth and neck of the container as required, the sealing means disposed on the inner surface of the top wall of the lid is brought into close contact with the upper end of the mouth and neck to seal the mouth and neck. When opening the mouth neck of the container, the container lid is rotated in the opening rotation direction. Thus, since the female thread formed on the skirt wall of the lid is moved along the male thread formed on the mouth-and-neck portion, the lid is moved upward with rotation. However, the tamper-evident hem of the lid is because the abruptly inclined rear surface of the ratchet piece formed on the inner peripheral surface cooperates with the abruptly inclined rear surface of the ratchet piece formed on the mouth and neck. Rotation is prevented, and thus a considerable amount of stress is generated at the bridge in the circumferential weakening line, thereby breaking all or at least most of the bridge (part of the bridge is broken). If it is allowed to remain without being broken, the tamper evidence skirt is broken in the axial direction and developed from an endless annular shape into an end band shape). After that, leave the tamper evidence hem at the mouth and neck and leave the other part of the lid (if all of the bridging part is broken and the tamper evidence hem is completely separated from the main part) or tamper The entire lid, including the evidence hem, is removed from the mouth and neck, and the mouth and neck are opened.
[0007]
[Problems to be solved by the invention]
Thus, the combination of the container and the lid disclosed in the above Japanese Patent Publication No. 62-18420 has the following problems to be solved. That is, when the lid is attached to the mouth and neck of the container as required and the mouth and neck is sealed as required, the top wall of the lid is slightly raised upward when the lid is rotated somewhat in the opening rotation direction. Although the seal means is released from the close contact with the mouth and neck by being moved, the circumferential weakening formed on the skirt wall due to the elastic deformation of the locking piece formed on the skirt of the tamper evidence There is often a possibility that all of the bridges in the line will be maintained without breaking. When such a situation occurs, it is sold because all the bridging parts are maintained without breaking, even though the neck and neck seals are damaged and the container contents can be corroded. Such a situation will not be clearly indicated to consumers or consumers.
[0008]
On the other hand, in the combination of the container and the lid disclosed in the above Japanese Utility Model Publication No. 56-131362, the rear surface of the ratchet claw formed on the mouth-and-neck part and the tamper-evidence hem part of the lid are provided. Due to the cooperation of the formed ratchet pawl with the abruptly inclined rear surface, not the upward movement of the lid but the rotation itself in the opening rotation direction is prevented. Accordingly, the lid is somewhat rotated to release the tightness of the sealing means to the mouth and neck without breaking at least most of the bridging portion in the circumferential weakening line formed in the skirt wall of the lid, thereby releasing the tightness of the sealing means to the mouth and neck. It is virtually impossible to damage the neck seal. However, the combination of the container and the lid disclosed in Japanese Utility Model Laid-Open No. 56-131362 has the following separate problems. When attaching the lid to the mouth and neck of the container as required, the ratchet piece formed on the tamper evidence hem of the lid is elastically displaced or deformed to overcome the ratchet piece of the mouth and neck. Although it is necessary to move in the circumferential direction, a considerable force can be applied to elastically displace or deform the ratchet pawl in the normal form formed on the inner peripheral surface of the tamper evidence skirt. Therefore, when the lid is attached to the mouth-and-neck portion, there is a high possibility that the bridging portion in the circumferential weakening line formed on the skirt wall of the lid is broken.
[0009]
The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that the sealing of the mouth and neck portion is damaged without breaking the bridging portion in the circumferential weakening line formed on the skirt wall. Is reliably prevented, and it is sufficiently reliably avoided that the bridging portion in the circumferential weakening line formed on the skirt wall is broken when the lid is attached to the mouth neck of the container. To provide a new and improved container and lid combination.
[0010]
[Means for Solving the Problems]
In order to solve the main technical problem, in the present invention,An annular locking jaw is formed on the outer peripheral surface of the mouth and neck of the container and below the male thread, and below the annular locking jaw.Forming a plurality of ratchet claws located at intervals in the circumferential direction. lidFrom the base edge connected to the inner peripheral surface of the tamper evidence hem, to the inner peripheral surface of the tamper evidence hemInclined radially inward upwardA plurality of locking pieces extending are formed at intervals in the circumferential direction. AndWhen the female thread of the lid is screwed onto the male thread of the mouth and neck and the lid is attached to the mouth and neck, each of the locking pieces of the lid is elastically deformed or displaced, and the annular engagement of the mouth and neck The pawl portion is configured to pass in the axial direction, pass through each of the ratchet claws in the circumferential direction, and then be elastically restored.
[0011]
That is, according to the present invention, as a combination of a container and a lid for solving the above main technical problem, a cylindrical mouth and neck portion is provided, and a male thread is formed on the outer peripheral surface of the mouth and neck portion. A container, a top wall and a cylindrical skirt wall depending from the top wall, and a circumferential weakening line extending in a circumferential direction is formed on the skirt wall, the skirt wall being the circumferential weakening line A main portion above the lower portion and a tamper evidence hem portion below the circumferential weakening line, and formed on the inner peripheral surface of the main portion of the skirt wall at the mouth and neck portion of the container. In combination with a synthetic resin lid on which a female thread that is screwed to the male thread is formed,
The outer peripheral surface of the mouth and neck of the container is below the male thread.An annular locking jaw that is located and below the annular locking jawMultiple ratchet claws located at intervals in the circumferential directionWhenEach of the ratchet claws is attached to the male screw thread of the mouth-and-neck part by screwing the female thread of the lid and attaching the cover to the mouth-and-neck part. When viewed in the direction of relative rotation of the mouth and neck, it has a front surface extending gently inclined outward in the radial direction toward the rear and a rear surface extending sharply inclined,
A plurality of locking pieces are formed at intervals in the circumferential direction on the inner peripheral surface of the tamper evidence skirt portion of the lid, and each of the locking pieces is formed on the tamper evidence skirt portion. From the base connected to the inner surfaceInclined radially inward upwardExtension,
When the female thread of the lid is screwed onto the male thread of the mouth and neck and the lid is attached to the mouth and neck, each of the locking pieces of the lid is elastically deformed or displaced. Passing through the annular locking jaw portion of the mouth-neck portion in the axial direction and passing through each of the ratchet claws in the circumferential direction, and then being elastically restored.
A combination of a container and a lid is provided.
[0012]
TheConveniently, the upper end of each ratchet pawl is connected to the lower surface of the annular locking jaw. Preferably, the wall thickness of each of the locking pieces is gradually increased upward, and in addition or alternatively, the male thread of the mouth-and-neck part is connected to the female thread of the lid. When the strips are screwed together and the lid is attached to the mouth and neck, the lid is gradually increased rearward as viewed in the relative rotation direction of the lid with respect to the mouth and neck. The base edge of each of the locking pieces is screwed into the male thread of the mouth and neck with the female thread of the lid, and the base and the neck when the lid is attached to the mouth and neck. It is advantageous for the lid to extend downwardly inclined as viewed in the direction of relative rotation of the lid. Relative of the lid with respect to the mouth and neck when the female thread of the lid is screwed onto the male thread of the mouth and neck of the locking piece and the lid is attached to the mouth and neck A projecting piece projecting outward or inward in the radial direction can be attached to the rear end when viewed in the rotational direction.
[0013]
[Action]
In the combination of the container and the lid of the present invention, in the state where the lid is attached to the mouth and neck of the container and the mouth and neck are sealed, the periphery of the locking piece formed on the tamper evidence hem of the lid One end in the direction (the rear end when viewed from the direction of rotation of the lid relative to the mouth and neck when the lid is attached to the mouth and neck by screwing the female thread of the lid onto the male thread of the mouth and neck) The ratchet pawl formed on the rear surface is in contact with the rear surface extending at a sharp inclination, so that the lid itself is prevented from rotating in the opening direction rather than moving upward, so that it is formed on the skirt wall of the lid. It is virtually impossible to loosen the sealing of the mouth and neck by releasing the tightness of the sealing means to the mouth and neck by rotating the lid somewhat without breaking the bridge in the circumferential weakening line It is. The locking piece formed on the tamper evidence hem of the lid is separated from the base edge connected to the tamper evidence hem.Inclined radially inward upwardDue to the extended form, it can be elastically deformed relatively easily.While passing through the annular locking jaw in the axial directionThe ratchet piece can be passed through in the circumferential direction, and therefore it is sufficiently certain that the bridging portion in the circumferential weakening line formed in the skirt wall will be broken when the lid is attached to the mouth and neck of the container. Can be avoided.
[0014]
【Example】
Hereinafter, preferred embodiments of a combination of a container and a lid constructed according to the present invention will be described in detail with reference to the accompanying drawings.
[0015]
FIG. 1 illustrates the mouth and neck 2 of a container in a preferred embodiment of a combination constructed in accordance with the present invention. The mouth-and-neck portion 2 of a container that can be molded from an appropriate synthetic resin such as polyethylene terephthalate or glass has a cylindrical shape, and a male thread 4 is formed on the outer peripheral surface thereof. On the outer peripheral surface of the mouth-and-neck portion 2, an annular locking jaw portion 6 positioned below the male thread 4 and an annular conveyance ring 8 positioned below the annular locking jaw portion 6 are also formed. As is well known to those skilled in the art, the annular transport ring 8 formed on the mouth-and-neck portion 2 automatically transports the container during the filling operation of the contents, the automatic mounting operation of the lid on the mouth-and-neck portion 2, and the like. Used for Further, four ratchet claws 10 are formed on the outer peripheral surface of the mouth-and-neck portion 2 at equal intervals in the circumferential direction between the annular locking jaw 6 and the annular transport ring 8. The upper end of each ratchet pawl 10StopConveniently, it is connected to the lower surface of the jaw 6 and also the lower end of each ratchet pawl 10 is connected to the upper surface of the annular conveying ring 8. Referring to FIG. 4 together with FIG. 1, each ratchet claw 10 has a direction indicated by an arrow 12 (the direction of relative rotation of the mouth and neck portion 2 with respect to the lid when a lid to be described later is attached to the mouth and neck portion 2) When viewed from the front side, the front surface 14 extends with a gentle inclination outward (inclination angle of about 20 to 40 degrees) toward the rear, and abrupt inclination inward in the radial direction (inclination angle of about 90 degrees). And a rear surface 16 extending.
[0016]
FIG. 2 illustrates the lid 18 in a preferred embodiment of a combination constructed in accordance with the present invention. The lid 18, which can be molded from a suitable synthetic resin such as polyethylene or polypropylene, has a circular top wall 20 and a cylindrical skirt wall 22 depending from the periphery of the top wall 20. A frustoconical portion 24 whose outer diameter gradually increases is formed at a substantially intermediate portion in the axial direction of the skirt wall 22. A circumferential weakening line 26 extending in the circumferential direction is formed on the skirt wall 22, and the skirt wall 22 has a main portion 28 above the circumferential weakening line 26 and a tamper shrimp below the circumferential weakening line 26. It is partitioned into a dent hem 30. The circumferential weakening line 26 will be described in more detail. An annular shoulder surface 32 facing downward is formed on the inner peripheral surface of the skirt wall 22, and an inner diameter below the shoulder surface 32 is an inner diameter above the shoulder surface 32. Is set larger than the predetermined dimension. A plurality of ribs 34 are formed below the shoulder surface 32 at intervals in the circumferential direction. Each of the ribs 34 extends substantially vertically downward from an upper end connected to the shoulder surface 32. Each of the ribs 34 is positioned substantially radially outward from the inner peripheral edge of the shoulder surface 32 without protruding radially inward from the inner peripheral edge of the shoulder surface 32. The skirt wall 22 and the rib 34 are cut off by leaving the radially inner portion of the rib 34 slightly below the shoulder surface 32, and the circumferential weakening line 26 is formed by such cutting. In FIG. 2, a cutting line formed by applying a cutting blade from the outer peripheral surface of the skirt wall 22 is denoted by reference numeral 36. The tamper evidence skirt 30 below the circumferential weakening line 26 is a main portion above the circumferential weakening line 26 via the radially inner portion of each rib 34 that remains without being cut. 28, the radially inner portion of each of the ribs 34 that remains without being cut off constitutes a bridging portion in the circumferential weakening line 26. As clearly shown in FIG. 2, the cutting line 36 is inclined at least partially in the axial direction upward and downward and is advanced in the circumferential direction, and extends at two points with different axial positions in the axial direction. It is preferred that at least one non-circumferential portion 37 is generated.
[0017]
On the outer peripheral surface of the skirt wall 22, an uneven portion 38 is formed at a portion above the frustoconical portion 24 to prevent slipping of a finger hung thereon. An annular ridge 40 is formed at the upper end of the inner peripheral surface of the main portion 28 of the skirt wall 22. A sealing means 42 is disposed in a region defined by the annular protrusion 40 and the inner surface of the top wall 20. The sealing means 42 is composed of a sealing member that can be molded from a relatively soft synthetic resin such as soft polyethylene separately from the main body of the lid 18. Such a sealing member can be conveniently formed by supplying a synthetic resin material in a softened and melted state to the inner surface of the top wall 20 of the lid 18 and embossing the synthetic resin material into a required shape, for example. If desired, an annular sealing ridge constituting a sealing means can be integrally formed on the inner surface of the top wall 20 of the lid 18. On the inner peripheral surface of the main portion 28 of the skirt wall 22, a female thread 44 that is screwed onto the male thread 4 formed on the mouth-and-neck portion 2 of the container is formed.
[0018]
Referring to FIG. 4 together with FIG. 2, a plurality of (eight) locking pieces 46 are formed on the inner peripheral surface of the tamper evidence skirt 30 in the skirt wall 22 at intervals in the circumferential direction. Yes. Each of the locking pieces 46 has a rectangular shape, and extends from the base edge 48 connected to the inner peripheral surface of the tamper evidence skirt 30 so as to be inclined inward in the radial direction upward. The base edge 48 of the locking piece 46 extends substantially horizontally. The extending end or upper end of the locking piece 46 is positioned somewhat below the lower end of the rib 34. As clearly shown in FIG. 2, the wall thickness of the locking piece 46 is advantageously increased gradually upward.
[0019]
3 and 4 together with FIGS. 1 and 2, when the lid 18 is attached to the mouth-and-neck portion 2 of the container and the mouth-and-neck portion is sealed, the lid 18 is covered on the mouth-and-neck portion 2. It is fitted and rotated in the closed rotation direction (clockwise when viewed from above in FIG. 3, the direction indicated by the arrow 50 in FIG. 4), and thus the lid 18 is attached to the male thread 4 formed on the outer peripheral surface of the mouth-and-neck portion 2. The female thread 44 formed on the inner peripheral surface of the main portion 28 in the skirt wall 22 is screwed together. At this time, each of the locking pieces 46 formed on the inner peripheral surface of the tamper evidence skirt 30 in the skirt wall 22 of the lid 18 is formed into an annular locking formed on the outer peripheral surface of the mouth-and-neck portion 2. Under the action of the jaw portion 6, it is elastically bent outwardly from the lower side and passes through the annular locking jaw portion 6 to be moved downwardly. Such elastic deformation of the locking piece 46 can be realized sufficiently easily by the shape of the locking piece 46 itself, and excessive stress is not generated in the bridging portion of the circumferential weakening line 26. In addition, the circumferential direction weakening line 26 includes the non-circumferential direction portion 37 as described above. When the lid 18 is rotated in the closed rotation direction, the non-circumferential direction portion 37 in the circumferential direction weakening line 26 The force in the closing rotation direction is transmitted from the main portion 28 of the skirt wall 22 to the tamper evidence skirt 30, and this also prevents excessive stress from being generated at the bridging portion in the circumferential weakening line 26. Below the annular locking jaw 6, the locking piece 46 is sufficiently easily received by the guiding action of the gently inclined front surface 14 of the ratchet claw 10 formed on the outer peripheral surface of the mouth and neck 2. 10 is allowed to pass in the circumferential direction. Since the upper end of the ratchet pawl 10 is connected to the lower surface of the annular locking jaw 6, the locking piece 46 bent outward in the radial direction under the action of the annular locking jaw 6 is radially outward. Before being elastically restored, the locking piece 46 can remarkably easily engage the ratchet claw 10 without generating additional stress on the bridging portion of the circumferential weakening line 26. It can move in the circumferential direction. Therefore, the lid 18 can be attached to the mouth-and-neck portion 2 without fear of breaking the bridging portion in the circumferential weakening line 26 formed on the skirt wall 22. When the lid 18 is attached to the mouth-and-neck portion 2 as required, each of the locking pieces 46 is elastically restored to be below the annular locking jaw 6 as clearly understood from FIGS. And between the ratchet claws 10. The final rotation angle position of the lid 18 with respect to the mouth-and-neck portion 2 can be defined by setting the relative relationship between the male thread of the mouth-and-neck portion 2 and the female thread 44 of the lid 18. If desired, in order to reliably set the final rotational angle position of the lid 18 with respect to the mouth-and-neck portion 2 to the angular position shown in FIG. Limiting means for limiting (for example, the outer peripheral surface of the mouth and neck portion 2 and / or the inner peripheral surface of the main portion 28 of the skirt wall 22 in association with the male thread 4 of the mouth and neck portion 2 and / or the female thread 44 of the lid 18. An abutting projection formed on the surface of the substrate can also be provided. As shown in FIG. 3, when the lid 18 is attached to the mouth-and-neck portion 2 as required, the sealing means 42 disposed on the inner surface of the top wall 20 of the lid 18 is brought into close contact with the upper end portion of the mouth-and-neck portion 2. As a result, the mouth and neck 2 is sealed.
[0020]
When opening the mouth-and-neck portion 2, the lid 18 is rotated in the opening rotation direction (counterclockwise when viewed from above in FIG. 3, opposite to the direction indicated by the arrow 50 in FIG. 4). The female thread 44 formed in the main portion 28 of the skirt wall 22 of the lid 18 with respect to the male thread 4 formed on the outer peripheral surface 2 is released. Thus, in the tamper evidence skirt 30 of the lid 18, the one end of the locking piece 46 (the rear end when viewed in the direction indicated by the arrow 50) is rapidly applied to the ratchet claw 10 formed in the mouth neck portion 2. By abutting on the rear surface 16 extending in an inclined manner, rotation in the opening rotation direction is prevented. Accordingly, a large stress is generated in the bridging portion (the uncut portion in each of the ribs 34) in the circumferential weakening line 26, whereby the bridging portion is broken and the tamper evidence skirt 30 becomes the main part of the skirt wall 22. Separated from section 28. The rotation of the tamper evidence skirt 30 in the above-described opening direction is sufficiently prevented by the cooperation of one end of the locking piece 46 and the rear surface 16 of the ratchet pawl 10 that extends at a steep inclination. The bridging portion in the circumferential break line 26 is broken sufficiently before the sealing means 42 of the lid 18 is separated from the upper end of the mouth-and-neck portion 2 by rotating an appropriate angle and the sealing of the mouth-and-neck portion 2 is released. Is done. In spite of the release of the sealing of the mouth-and-neck portion 2, there is virtually no situation in which the bridging portion of the circumferential break line 26 is maintained without being broken. After the bridging portion of the circumferential weakening line 26 is broken and the tamper evidence skirt 30 is separated from the main portion 28 of the skirt wall 22, the tamper evidence skirt 30 is left on the neck 2 and the lid 18. The other parts of the mouth and neck are separated from the mouth and neck 2 and thus the mouth and neck 2 is opened.
[0021]
If desired, by forming an axially weakening line such as a score or perforation extending in the axial direction on the tamper evidence skirt 30 and leaving the circumferential part of the skirt wall 22 without cutting, for example. When the non-breaking bridging portion is generated in the circumferential weakening line 26 and the mouth-and-neck portion 2 is opened, the axial weakening line is broken so that the tamper evidence skirt 30 is changed from an endless annular shape to an end-band shape. The tamper-evidence skirt 30 is unfolded and connected to the main portion 28 of the skirt wall 22 through the non-breaking bridge portion so that the entire lid 18 can be detached from the mouth-neck portion 2. You can also.
[0022]
5 to 7 illustrate modifications of the locking piece 46 formed on the inner peripheral surface of the tamper evidence skirt 30. FIG. In the modification shown in FIG. 5, the thickness of the locking piece 46 is gradually increased upward, and in the closed rotation direction indicated by the arrow 50 (the lid 18 is attached to the mouth-and-neck portion 2). The lid 18 is gradually increased in the rearward direction as viewed in the relative rotation direction of the lid 18 with respect to the mouth-and-neck portion when worn. In the modification shown in FIG. 6, the base edge 48 of the locking piece 46 does not extend substantially horizontally, but extends obliquely downward toward the rear as viewed in the closed rotation direction indicated by the arrow 50. ing. In both the modification shown in FIG. 5 and the modification shown in FIG. 6, when the lid 18 is attached to the mouth-and-neck portion 2, the locking piece 46 is closed and rotated from the lower side to the upper side by the arrow 50. It can be more easily elastically bent from the front to the rear as viewed in the direction. On the other hand, in both the modified example illustrated in FIG. 5 and the modified example illustrated in FIG. 6, one end of the locking piece 46 (after being viewed in the closing rotation direction indicated by the arrow 50) when opening the mouth-and-neck portion 2. End) and the rear surface 16 of the ratchet claw 10 in the mouth-and-neck portion 2, the rotation preventing action of the tamper evidence skirt 30 in the opening rotation direction is not substantially reduced. In the modification shown in FIG. 7, a protruding piece 52 protruding inward in the radial direction is attached to each one end of the locking piece 46, that is, the rear end when viewed in the rotation direction indicated by the arrow 50. When the lid 18 is rotated in the opening rotation direction (the direction opposite to the closing rotation direction indicated by the arrow 50) in order to open the mouth-and-neck portion 2, the protruding piece 52 and the one end of the locking piece 46 are in contact with the mouth-and-neck. It is made to contact | abut to the rear surface 16 of the ratchet nail | claw 10 of the part 2, and, thereby, the rotation to the opening rotation direction of the tamper evidence skirt part 30 is blocked | prevented more reliably. Instead of or in addition to forming the protruding piece 52 protruding inward in the radial direction, a protruding piece 54 protruding inward in the radial direction can be provided as shown by a two-dot chain line in FIG.
[0023]
【The invention's effect】
In the combination of the container and the lid of the present invention, it is surely prevented that the sealing of the mouth and neck is released without breaking the bridging portion in the circumferential weakening line formed on the skirt wall of the lid. In addition, when the lid is attached to the mouth / neck portion of the container, it is possible to surely avoid breaking the bridging portion in the circumferential weakening line formed in the skirt wall.
[Brief description of the drawings]
FIG. 1 is a half cross-sectional / side view of a mouth and neck of a container in a preferred embodiment of a combination constructed in accordance with the present invention, partly in section and partly in side view.
FIG. 2 is a half cross-sectional / side view of a lid in a preferred embodiment of a combination constructed in accordance with the present invention, partly in section and partly in side view.
3 is a half cross-sectional / side view showing a state in which the lid of FIG. 2 is attached to the mouth / neck portion of FIG. 1, partly in section and partly in side view.
4 is a cross-sectional view showing a state where the lid of FIG. 2 is attached to the mouth and neck of FIG.
FIG. 5 is a partial slant view showing a modification of the locking piece formed on the inner peripheral surface of the tamper evidence skirt of the lid in the preferred embodiment of the combination constructed according to the present invention.
FIG. 6 is a partial perspective view showing another modified example of the locking piece formed on the inner peripheral surface of the tamper evidence skirt of the lid in the preferred embodiment of the combination constructed according to the present invention.
FIG. 7 is a partial perspective view showing still another modified example of the locking piece formed on the inner peripheral surface of the tamper evidence skirt of the lid in the preferred embodiment of the combination constructed according to the present invention.
[Explanation of symbols]
2: The mouth and neck of the container
4: Male thread
6: Circular locking jaw
10: Ratchet claw
14: The front of the ratchet nail
16: Rear surface of ratchet nail
18: Lid
20: Top wall
22: Skirt wall
26: Circumferential weakening line
28: Main part of skirt wall
30: Tamper evident hem
42: Sealing means
44: Female thread
46: locking piece
48: Base edge of locking piece
52: Protruding piece attached to the locking piece
54: Protruding piece attached to the locking piece

Claims (6)

A container having a cylindrical mouth and neck, and a male thread formed on the outer peripheral surface of the mouth and neck; a top wall and a cylindrical skirt wall depending from the top wall; Is formed with a circumferential weakening line extending in the circumferential direction, and the skirt wall is divided into a main portion above the circumferential weakening line and a tamper evidence hem below the circumferential weakening line. And a synthetic resin lid in which a female thread is formed on the inner peripheral surface of the main part of the skirt wall and is screwed into the male thread formed on the mouth and neck of the container. In combination with
On the outer peripheral surface of the mouth-and-neck portion of the container, there are an annular locking jaw portion positioned below the male screw thread, and a plurality of circumferentially spaced intervals below the annular locking jaw portion ratchet pawl and is formed, each of the ratchet pawl, in mounting the lid on the mouth and neck are brought screwing the female screw threads of the lid to the male screw thread of the mouth and neck As viewed in the direction of relative rotation of the mouth and neck with respect to the lid, and having a front surface extending gently inclined radially outward toward the rear and a rear surface extending sharply inclined,
A plurality of locking pieces are formed at intervals in the circumferential direction on the inner peripheral surface of the tamper evidence skirt portion of the lid, and each of the locking pieces is formed on the tamper evidence skirt portion. Inclining radially inward from the base edge connected to the inner peripheral surface and extending upward ,
When the female thread of the lid is screwed onto the male thread of the mouth and neck and the lid is attached to the mouth and neck, each of the locking pieces of the lid is elastically deformed or displaced. Passing through the annular locking jaw portion of the mouth-neck portion in the axial direction and passing through each of the ratchet claws in the circumferential direction, and then being elastically restored.
A combination of a container and a lid characterized in that. The respective upper end of the ratchet pawl is connected to the lower surface of the annular locking jaws, claim 1 vessels and the combination of the lid according. The container and lid combination according to claim 1 or 2 , wherein the thickness of each of the locking pieces is gradually increased upward. The thickness of each of the locking pieces is such that the lid with respect to the mouth and neck when the female thread of the lid is screwed onto the male thread of the mouth and neck and the lid is attached to the mouth and neck. The combination of a container and a lid according to any one of claims 1 to 3 , wherein the container is gradually increased rearward as viewed in the relative rotation direction. The base edge of each of the locking pieces is screwed into the male thread of the mouth and neck with the female thread of the lid, and the base and the neck when the lid is attached to the mouth and neck. The combination of a container and a lid according to any one of claims 1 to 4 , wherein the container extends in a downwardly inclined direction when viewed in the relative rotation direction of the lid. Relative of the lid with respect to the mouth and neck when the female thread of the lid is screwed onto the male thread of the mouth and neck of the locking piece and the lid is attached to the mouth and neck 6. A combination of a container and a lid according to any one of claims 1 to 5 , wherein a projecting piece projecting radially outward or inward is attached to a rear end when viewed in a rotational direction.

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