JPH0811906A - Combination of container with cover - Google Patents

Abstract

PURPOSE:To break a peripheral weak line at the time of opening a container by a method wherein a ratchet pawl is formed in a mouth-neck part of the container, a plurality of ratchet pieces are formed in a tamper evident skirt part of a cover, and constraining projections for restricting the deflection of the ratchet pieces are formed in proximity to the base parts of the ratchet pieces. CONSTITUTION:When a cover is opened, a ratchet piece 50 of a tamper evident skirt part 36 acts to a rear surface 22b of an auxiliary fastening pawl 18b, and the top part of the ratchet piece 50 is deflected. After that, the ratchet piece 50 abuts against a rear surface 16b of a ratchet pawl 12b, and the movement of the tamper evident skirt part 36 in an open direction is arrested. At this time, each of base parts of the ratchet pieces 50 abuts against a constraining projection 52. With respect to the ratchet pawl 12b, the top part of the ratchet piece 50 is fastened by a front surface 20b of the auxiliary fastening pawl 18b. Thus, the deflection of the ratchet piece 50 is restricted. In this manner, the movement of the tamper evident skirt part 36 in an open direction is positively arrested. The mouth-neck part is unsealed by breaking a plurality of ribs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to 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 the mischief is added. ) With a container and a lid.

[0002]

2. Description of the Related Art As a combination of a container having a tamper-evidence characteristic and a lid, Japanese Patent Publication No. 43-6198 and Japanese Utility Model Publication No. 56-31559 disclose a combination of a container having a ratchet mechanism and a lid. Is disclosed. The container can be made of glass or a suitable synthetic resin, and the lid can be made of a suitable synthetic resin.

In the container in the above combination, a plurality of ratchet pawls are formed on the outer peripheral surface of the mouth and neck together with the male screw thread. The plurality of ratchet pawls are circumferentially spaced below the male thread. Each of the ratchet pawls is projected outward in the radial direction from the outer peripheral surface of the mouth and neck, and when the lid is attached to the mouth and neck of the container (more specifically, the male screw of the mouth and neck and the female screw of the lid are attached). (When screwing with the strip), when viewed in the direction of relative rotation of the container with respect to the lid, a gentle front surface extending obliquely outward in the radial direction toward the rear, and a steep rear surface extending outward in the radial direction. Have.

The lid in the above combination includes a top wall and a tubular 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 part above the circumferential weakening line and a tamper-evidence hem below the circumferential weakening line. There is. The circumferential weakening line is composed of, for example, a plurality of slits (cutting grooves) extending in the circumferential direction at intervals in the circumferential direction, and bridging portions left between the slits. On the inner peripheral surface of the main part of the skirt wall, a female thread is formed which is screwed into a male thread on the mouth and neck of the container. On the inner peripheral surface of the tamper-evident skirt, a plurality of ratchet pieces that cooperate with the ratchet pawls in the mouth and neck of the container are formed at intervals in the circumferential direction. Each of the ratchet pieces is projected inward in the radial direction from the inner peripheral surface of the tamper-evidence skirt, and is viewed in the relative rotation direction of the lid with respect to the container when the lid is attached to the mouth and neck of the container. , A gentle front surface extending inwardly in a radial direction toward the rear, and a steep rear surface extending inward in the radial direction.

When the male thread on the mouth and neck of the container and the female thread on the lid are screwed together and the lid is attached to the mouth and neck of the container to seal the mouth and neck, it is formed on the mouth and neck. The tamper-evidence skirt is elastically displaced outward in the radial direction by the mutual guiding action of the gradual front surface of the ratchet pawl that is formed and the gradual front surface of the ratchet piece formed on the lid, or in addition to this. The ratchet piece itself is also elastically displaced outward in the radial direction, thus overcoming the ratchet pawl and moving the ratchet piece in the circumferential direction. When the lid is rotated relative to the container in the opposite direction in order to open the mouth and neck of the container, it is formed on the raised rear surface of the ratchet claw formed on the mouth and neck and the lid. The cooperation of the ratchet strip with the raised rear surface prevents the ratchet strip from moving in the circumferential direction over the ratchet pawl, thus causing the tamper-evidence skirt to rotate with the main part of the skirt wall. Be blocked. Thus,
Substantial stress is generated in the circumferential weakening line of the lid, and more specifically in its bridging portion, causing the bridging portion to break and separating the tamper-evident skirt from the main portion of the skirt wall. Thereafter, the lid is lifted with rotation and separated from the mouth and neck, leaving the tamper-evident hem, and thus the mouth and neck is opened. When the axial rupture line extending in the axial direction is formed on the tamper evidence hem,
By breaking the axial breaking line, the tamper-evident hem is released from the endless annular shape to the endless belt shape without breaking one to a few bridges, and the ratchet pawl and the ratchet piece cooperate. The tamper-evidence skirt connected to the main part of the skirt wall via the non-breaking bridge is also lifted with rotation and separated from the mouth / neck.

[0006]

The conventional combination of the container and the lid having the above-mentioned forms has the following problems to be solved. When attaching the lid to the mouth and neck of the container, it is necessary for the ratchet piece of the lid to move over the ratchet claw of the mouth and neck and move in the circumferential direction, and for that purpose, the tamper evidence hem of the lid has a radius. It is necessary to be elastically displaced outward in the direction. Thus, when the tamper-evident skirt is displaced radially outward, a non-trivial stress is created in the circumferential weakening line of the skirt wall, and more specifically in its bridge. Therefore, when the lid is attached to the mouth and neck, the bridging portion in the circumferential weakening line formed on the skirt wall is likely to be broken.

In order to surely prevent the bridging portion in the circumferential weakening line from being broken when the lid is attached to the mouth / neck portion, if the breaking strength of the bridging portion in the circumferential weakening line is increased, When opening the mouth and neck of the container, a considerable amount of force is required to break the bridge portion in the circumferential weakening line, which makes opening of the mouth and neck considerably difficult, especially for women and children.

The present invention has been made in view of the above situation, and its main problem to be solved is to increase the breaking strength of the bridging portion in the circumferential weakening line formed on the skirt wall without excessively increasing the breaking strength. Therefore, even if a woman or a child can open the mouth and neck with sufficient ease, the circumferential weakening line formed on the skirt wall when the lid is attached to the mouth and neck to seal the mouth and neck It is an object of the present invention to provide a new and improved container-lid combination in which breakage of the bridging portion in is sufficiently reliably avoided.

[0009]

In order to achieve the above-mentioned main problems to be solved, the inventors of the present invention previously mentioned in 1993 Japanese Patent Application No. 145851 and the drawings that the outer peripheral surface of the mouth and neck portion of the container. Each of the plurality of ratchet pawls arranged in
When viewed in the direction of relative rotation of the container with respect to the lid when the male screw thread and the female screw thread are screwed together, a gentle front surface extending obliquely upward (not radially outward) toward the rear ( And a raised rear surface extending upward (rather than radially outwardly), and surrounding each of the plurality of ratchet pieces located at the tamper-evident hem of the lid with a tamper-evident hem. It was proposed that the shape should extend downward with a space in the direction.However, as a result of further study, in addition to the previous proposal, a male screw was added to the outer peripheral surface of the tamper-evident hem of the lid. The male thread and the female thread are located close to the base of the ratchet piece on the front side of the ratchet piece when viewed in the relative rotation direction of the lid with respect to the container when the thread and the female thread are screwed together. Relative rotation of the lid to the container when screwing Ratchet pieces to form a catch protrusion to limit the resiliently flexible forward to look into, and /
Or, on the outer peripheral surface of the mouth and neck of the container, when viewed from the relative rotation direction of the container with respect to the lid when screwing the male screw and the female screw, close to the ratchet pawl on the rear side of the ratchet pawl. The container is located at the upper part of the container, and when viewed in the direction of relative rotation of the container with respect to the lid when the male screw and the female screw are screwed together, a steep front surface extending upward and a gentle rear surface extending upward toward the front are formed. The ratchet has an auxiliary locking claw having an upper end lower than the upper end of the ratchet claw, and the lid is rotated relative to the container in a direction to release the screw engagement between the male screw and the female screw. When the piece is brought into contact with the ratchet claw, the tip of the ratchet piece is positioned between the ratchet claw and the auxiliary locking claw, and the tip of the ratchet piece is locked by the auxiliary locking claw, so that the male Of the lid to the container when screwing the thread and the female thread Eggplant as ratchet pieces to the front when viewed in pairs rotation direction is restricted to flex resiliently, found that it is possible to achieve a principal object more reliably above by.

That is, according to the first aspect of the present invention, as a combination of a container and a lid that achieves the above-mentioned main technical problems, a container in which a male thread is arranged on the outer peripheral surface of the mouth and neck portion. And a top wall and a cylindrical skirt wall hanging from the top wall, and a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is located above the circumferential weakening line. And a tamper-evidence skirt below the circumferential weakening line, and the inner peripheral surface of the main portion of the skirt wall is arranged at the mouth-neck portion of the container. In combination with a lid in which a female thread to be screwed into the male thread is formed, the male thread and the female thread are screwed to the outer peripheral surface of the mouth-neck portion of the container. When viewed in the relative rotation direction of the container with respect to the lid at the time of extending, it extends obliquely upward toward the rear A plurality of ratchet pawls having a gentle front surface and a raised rear surface extending upward are formed, and the tamper-evidence hem portion of the lid extends downward at intervals in the circumferential direction. A plurality of ratchet pieces are formed to cooperate with the pawls, and further, the ratchet pieces of the ratchet piece are viewed relative to the container relative to the container when the male thread and the female thread are screwed together. The ratchet piece is located on the front side in the vicinity of the base of the ratchet piece, and the ratchet piece is located forward when viewed in the relative rotation direction of the lid with respect to the container when the male screw and the female screw are screwed together. A combination is provided, characterized in that a restraining projection is formed to limit elastic deflection.

Further, according to the second aspect of the present invention, as a combination of a container and a lid that achieves the above-mentioned main technical problems, a container in which a male thread is provided on the outer peripheral surface of the mouth-neck portion. And a top wall and a cylindrical skirt wall hanging from the top wall, and a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall is located above the circumferential weakening line. And a tamper-evidence skirt below the circumferential weakening line, and the inner peripheral surface of the main portion of the skirt wall is arranged at the mouth-neck portion of the container. In combination with a lid in which a female thread to be screwed into the male thread is formed, the male thread and the female thread are screwed to the outer peripheral surface of the mouth-neck portion of the container. When viewed in the relative rotation direction of the container with respect to the lid at the time of extending, it extends obliquely upward toward the rear A plurality of ratchet pawls having a gentle front surface and a raised rear surface extending upward are formed, and the tamper-evidence hem portion of the lid extends downward at intervals in the circumferential direction. A plurality of ratchet pieces that cooperate with claws are formed, and the outer peripheral surface of the mouth-neck portion of the container is further provided with respect to the lid when the male thread and the female thread are screwed together. The container, which is located on the rear side of the ratchet pawl and close to the ratchet pawl when viewed in the relative rotation direction of the container, and for the lid when the male screw and the female screw are screwed together. Of the auxiliary locking pawls, which have a raised front surface extending upward and a gentle rear surface extending upward toward the front, and whose upper end is lower than the upper end of the ratchet pawl when viewed in the relative rotation direction of the ratchet pawl. In the container in a direction to release the screwing of the male thread and the female thread. Then, by rotating the lid relatively to bring the ratchet piece into contact with the ratchet pawl, the tip of the ratchet piece is positioned between the ratchet pawl and the auxiliary locking pawl, and the ratchet The front end of the piece is locked to the auxiliary locking claw, so that when the male screw and the female screw are screwed together, the lid is moved forward when viewed in the relative rotation direction of the lid with respect to the container. A combination is provided which is characterized in that the ratchet piece is restricted from elastically flexing.

On the outer peripheral surface of the mouth-neck portion of the container, a protruding flange is formed which protrudes in the radial direction below the male screw, and the ratchet pawl is formed on the upper surface of the protruding flange. Is preferred. Preferably, the inclination angle α of the front surface of each of the ratchet pawls is 25 to 65 degrees, and the inclination angle β of the rear surface of each of the ratchet pawls is 7 degrees.
0 to 140 degrees, and viewed in the direction of relative rotation of the lid with respect to the container when the male thread of the mouth and neck and the female thread of the main portion of the skirt wall are screwed together. Thus, each of the ratchet pieces extends downward with an inclination angle γ of 10 to 70 degrees. The inclination angle α'of the front surface of the auxiliary locking claw is preferably 70 to 140 degrees, and the inclination angle β'of the rear surface of the auxiliary locking claw is preferably 25 to 65 degrees. Suitably, the skirt wall is provided with an annular surrounding portion which is connected to the tamper evidence skirt and which surrounds the ratchet piece.

[0013]

In the combination of the container and the lid of the present invention, when the lid is mounted on the mouth and neck of the container by rotating the lid relative to the container in the mounting direction, At least a part of the ratchet piece in the tamper-evidence skirt portion of the lid is bent in the circumferential direction by the guide action of the front surface of the ratchet pawl, and the ratchet piece is moved over the ratchet pawl in the circumferential direction. Some force that acts upward or circumferentially from the ratchet piece is transmitted to the tamper-evidence skirt, but when this force displaces the tamper-evident skirt upwards or circumferentially, the tamper-evidence skirt is displayed. The upper end of the part is brought into direct contact with the lower end of the main part of the skirt wall, so that the force is transferred from the tamper-evidence hem to the main part of the skirt wall without causing excessive stress in the bridge part. . The tamper-evidence skirt is not displaced radially outwardly, which causes excessive stress to be generated in the bridge, and when the lid is attached to the mouth and neck of the container, it does not become It is surely avoided that the bridge portion is broken due to excessive stress. When rotating the lid in the opposite direction to open the mouth and neck, the rotation of the tamper-evidence hem is prevented by the cooperation of the raised back surface of the ratchet claw in the mouth and neck and the ratchet piece in the lid, The bridging portion at the circumferential break line formed on the skirt wall is broken easily as required. The rotation of the tamper-evidence hem of the lid is prevented by the cooperation of the raised back surface of the ratchet claw and the ratchet piece on the restraining protrusion formed on the tamper-evident hem of the lid and / or the outer peripheral surface of the mouth / neck of the container. The auxiliary locking claw formed limits the flexure of the ratchet piece in a predetermined direction, so that the ratchet piece is reliably realized.

[0014]

The preferred embodiments of the combination of the container and the lid constructed according to the present invention will be described below with reference to the accompanying drawings.
Further details will be described.

The preferred embodiment of the combination of the present invention comprises a container whose mouth and neck 2 is shown in FIG. 1 and a lid 4 which is shown generally in FIG.

Referring to FIG. 1, a container which can be formed from a suitable synthetic resin such as polyethylene terephthalate or glass has a mouth 2 having a substantially cylindrical shape. On the outer peripheral surface of the mouth / neck portion 2, a male thread 6 and an annular locking jaw 8 located below the male thread 6 are formed. When the lid 4 shown in FIG. 2 is applied to the mouth / neck portion 2, the locking jaw 8 is unnecessary, but instead of the lid 4 shown in FIG. 2, the locking jaw 8 is locked to the inner surface of the tamper evidence hem. A well-known synthetic resin lid or a well-known metal lid in which the lower end of the tamper-evident hem is deformed radially inward after being mounted on the mouth-neck 2 When applied, the locking means or the lower end of the modified tamper-evidence hem is locked to the locking jaw (hence the mouth and neck 2 shown with the lid shown in FIG. 2). , The above-mentioned well-known synthetic resin lid or metal lid can be selectively applied).

The mouth / neck portion 2 is further formed with an annular flange 10 which projects radially outward below the locking jaw portion 8. Referring to FIGS. 3 and 4 together with FIG. 1, four ratchet pawls 12a, 12b, 12c and 12d are formed on the upper surface of the annular flange 10 at equal intervals in the circumferential direction. If desired, two or three or five or more ratchet pawls may be formed on the annular flange 10 at appropriate intervals in the circumferential direction. Each of the ratchet claws 12a, 12b, 12c, and 12d is a rotation direction of the mouth / neck portion 2 with respect to the lid 4 when the lid 4 is attached to the mouth / neck portion 2 (counterclockwise in FIG. 3, leftward in FIG. 4). As seen in FIG. 1, gentle front surfaces 14a, 14b, 14c and 14d extending upward toward the rear,
It has raised rear surfaces 16a, 16b, 16c and 16d extending upward. The inclination angle α of the front faces 14a, 14b, 14c and 14d of the ratchet pawls 12a, 12b, 12c and 12d with respect to the upper face of the annular flange 10 is 25.
To 65 degrees and the rear surface 1 of the ratchet pawls 12a, 12b, 12c and 12d relative to the upper surface of the annular flange 10.
The inclination angle β of 6a, 16b, 16c and 16d is conveniently between 70 and 140 degrees.

Continuing the description with reference to FIGS. 3 and 4 together with FIG. 1, the annular flange 10 has two ratchet pawls 12b, 12d of the four ratchet pawls 12a, 12b, 12c, 12d. Two auxiliary locking claws 18b and 18d are also formed in relation to the above. The auxiliary locking claws 18b and 18d respectively rotate in the rotation direction of the mouth / neck portion 2 with respect to the lid 4 when the lid 4 is attached to the mouth / neck portion 2 (see FIG. 3).
In the counterclockwise direction and in the left direction in FIG. 4), the ratchet pawl 1 is located behind the ratchet pawls 12b and 12d.
It is located close to 2b and 12d. Then, when attaching the lid 4 to the mouth / neck portion 2, when viewed in the rotation direction of the mouth / neck portion 2 with respect to the lid 4, the raised front surface 2 extending upward.
0b and 20d, and gentle rear surfaces 22b and 22d that extend forward and incline upward. The inclination angles α'of the front surfaces 20b and 20d of the auxiliary locking claws 18b and 18d with respect to the upper surface of the annular flange 10 are 70 to 140 degrees, and the auxiliary locking claw 1 with respect to the upper surface of the annular flange 10 is formed.
8b and 18d rear surface 22b and 22d inclination angle β '
Advantageously, is between 25 and 65 degrees. The upper ends of the auxiliary locking claws 18b and 18d are ratchet claws 12b and 12d.
It is preferable that the height h'of the auxiliary locking claws 18b and 18d is lower than the upper end of d and is approximately half the height h of the ratchet claws 12b and 12d. The circumferential distance L1 between the upper ends of the ratchet pawls 12b and 12d and the upper ends of the auxiliary locking pawls 18b and 18d is about 2 to 3 times the circumferential thickness at the tip of the ratchet piece, which will be described later, formed on the lid 4. Good.

In the illustrated embodiment, the auxiliary locking pawl 1 is associated with only two ratchet pawls 12b and 12d.
Although 8b and 18d are attached, auxiliary locking pawls can be attached in association with the ratchet pawls 12a and 12c if desired. However, for example, in the case of molding the mouth / neck part 2 of the container by using a molding female mold that is divided into two along the dividing line indicated by the two-dot chain line AA in FIG. 3, the ratchet claws 12b and 12d Since the auxiliary locking claws 18b and 18d which are provided at the least do not cause an excessive undercut, there is no problem in the molding process, but the auxiliary locking claws are provided in association with the ratchet claws 12a and 12c. Then, the auxiliary locking claws generate an excessive undercut, and it becomes substantially impossible or significantly difficult to demold the molded mouth / neck portion 2 by using a molding female mold that is divided into two pieces. It is necessary to use a complex and expensive molding die that is divided into pieces.

Referring to FIG. 2, the lid 4, which may be formed from a suitable synthetic resin such as polyethylene or polypropylene, has a circular top wall 24 and this top wall 24.
And a cylindrical skirt wall 26 depending from the peripheral edge of the. An annular sealing ridge 28 that hangs downward is formed on the inner surface of the top wall 24, and an annular sealing ridge 3 is formed in the boundary region between the outer peripheral edge of the inner wall of the top wall 24 and the upper end of the inner peripheral surface of the skirt wall 26.
0 is formed. A circumferential weakening line 32 extending in the circumferential direction is formed in the lower half portion of the skirt wall 26,
The skirt wall 26 is divided into a main portion 34 above the circumferential weakening line 32 and a tamper evidence skirt 36 below the circumferential weakening line 32. On the inner peripheral surface of the skirt wall 26, two downwardly facing annular shoulder portions 38 and 40 are formed, and a plurality of ribs 42 extending downward from the lower shoulder portion 40 by a relatively short length are formed. It is formed at intervals in the direction. In the circumferential weakening line 32, a cutting blade (not shown) acts from the outer peripheral surface side of the skirt wall 26 in the region where the plurality of ribs 42 are formed, and only the ribs 42 are left to remain. It is formed by cutting 26. Multiple ribs 4
2 constitutes a so-called bridge portion, and a tamper-evidence hem portion 36
Are connected to the main portion 34 via a plurality of ribs 42. A female thread 44 is formed on the inner peripheral surface of the main portion 34 of the skirt wall 26.
Are formed. An annular inclined shoulder portion 46 is formed on the outer peripheral surface of the main portion 34 of the skirt wall 26.
Non-slip unevenness 48 is formed in a region above 6.

Referring to FIG. 4 together with FIG. 2, the tamper-evidence skirt portion 36 has a plurality of ratchet pieces 50 (for example, 24 pieces) extending downward from the lower end thereof at equal intervals in the circumferential direction. Is formed. Ratchet piece 50
When viewed in the rotational direction of the lid 4 with respect to the mouth and neck 2 when the lid 4 is attached to the mouth and neck 2 of the container (clockwise when viewed from above in FIG. 2, rightward in FIG. 4), It is preferable that it extends downward and inclines rearward. The inclination angle γ of the ratchet piece 50 is preferably 10 to 70. As clearly shown in FIG. 4, the ratchet piece 50
Conveniently, the wall thickness T of is gradually decreased toward the tip. There is a vertical gap G1 between the upper end of the ratchet piece 50, and thus the lower end of the tamper-evidence skirt 36, and the upper ends of the ratchet pawls 12a, 12b, 12c, and 12d in the mouth / neck 2, and the gap G1 is the ratchet. It is preferable that the thickness T is set to be slightly larger than the thickness T of the piece 50.

Continuing the description with reference to FIG. 4 together with FIG. 2, the male thread 6 of the mouth / neck portion 2 is further screwed onto the female thread 44 of the lid 4 at the lower end of the tamper-evident hem portion 36. When the lid 4 is tightly attached to the mouth / neck portion 2, each of the ratchet pieces 50 is viewed in the rotation direction of the lid 4 with respect to the mouth / neck portion 2 (clockwise when viewed from above in FIG. 2, rightward in FIG. 4). A restraining projection 52 is also formed on the front side of the ratchet so as to be located close to the base of the ratchet piece 50. The restraining protrusions 52 are substantially parallel to the base of the ratchet piece 50, and thus when viewed in the rotation direction of the lid 4 with respect to the mouth / neck 2 when the lid 4 is mounted on the mouth / neck 2.
It is preferable that the angle of inclination γ which may be 10 to 70 degrees is formed, and the angle is extended backward and inclined downward. The extension length of the restraining protrusion 52 may be a little (for example, the ratchet piece 5).
It may be about 5 to 1/7 of the extension length of 0). The circumferential distance L2 between the ratchet piece 50 and the restraining protrusion 52 attached to the ratchet piece 50 at the upper end of the ratchet piece 50 (and thus the lower end of the tamper-evident hem 36) is 0.5 to 1.5 m.
It is preferably about m. A circumferential distance L3 between the ratchet piece 50 at the upper end of the ratchet piece 50 and the restraining protrusion 52 attached to the ratchet piece 50 adjacent to the ratchet piece 50.
(That is, the circumferential distance L3 between the ratchet piece 50 and the restraining projection 52 located rearward in the rotation direction of the lid 4 with respect to the mouth / neck portion 2 when the lid 4 is mounted on the mouth / neck portion 2) is the ratchet piece. It is preferable that the extension length L4 is set to be slightly larger than 50.

Continuing the description with reference to FIG. 2, an annular surrounding portion 54 is attached to the outer peripheral surface of the tamper-evident skirt portion 36. The annular surrounding portion 54 extends radially outward from the outer periphery of the tamper-evint hem portion 36 and then extends downward to surround the ratchet piece 50 and the restraining protrusion 52.

Referring to FIG. 5 together with FIGS. 1 to 4, when the lid 4 is attached to the mouth / neck portion 2 of the container to seal the mouth / neck portion 2, the lid 4 is attached to the mouth / neck portion 2. The lid 4 is closed with respect to the mouth / neck portion 2 by fitting (clockwise when viewed from above in FIG. 5,
4), the female screw 44 of the lid 4 is screwed onto the male screw 6 of the mouth / neck portion 2. The lid 4 is lowered along with the rotation, and when the male thread 6 and the female thread 44 are screwed to the state shown in FIG.
0 is brought into close contact with the upper end of the outer peripheral surface of the mouth / neck portion 2, and the annular sealing ridge 28 of the lid 4 is inserted into the mouth / neck portion 2 to be brought into close contact with the inner peripheral surface of the mouth / neck portion 2, thus The mouth / neck 2 is sealed. In the latter half of the wearing operation such as the lid 4, the ratchet claws 12 a, 12 of the mouth / neck part 2 are formed.
b, 12c and 12d and the ratchet piece 50 of the lid 4 interfere with each other, but the ratchet claws 12a, 12
b, 12c and 12d gentle front faces 14a, 14b,
By acting on 14c and 14d, the ratchet piece 50 elastically bends rearward as shown by the chain double-dashed line in FIG. 4, and the ratchet piece 50 is sufficiently easily moved.
a, 12b, 12c and 12d can be passed. Since the ratchet piece 50 extends rearward and inclines downward as viewed in the closing direction, the ratchet piece 50 can be bent rearward sufficiently easily. Since the restraint protrusion 52 is disposed in front of the ratchet piece 50, the restraint protrusion 52 does not hinder the ratchet piece 50 from bending backward. Also, as will be readily understood with reference to FIG. 4, ratchet pawls 12b and 12d.
Since the height h'of the auxiliary locking pawls 18b and 18d attached to the ratchet is sufficiently lower than the height h of the ratchet pawls 12b and 12d, the ratchet piece 50 that has passed through the ratchet pawls 12b and 12d cannot be auxiliary locked. The pawls 18b and 18d pass through the auxiliary locking pawls 18b and 18d with little interference. When the ratchet piece 50 bends rearward in the circumferential direction and passes through the ratchet pawls 12a, 12b, 12c and 12d, some force acting upward or circumferentially is transmitted to the tamper-evidence skirt 36. When the tamper-evidence skirt portion 36 is displaced upward or circumferentially by the force, the upper end of the tamper-evidence skirt portion 36 at the circumferential weakening line 32 causes the skirt wall 2 to move.
6 is directly brought into contact with the lower end of the main portion 34, and the tamper-evidence skirt portion 36 to the main portion of the skirt wall 26 can be formed without causing excessive stress to the ribs 42 forming the bridge portion. Power is transmitted to 34. The tamper-evidence skirt portion 36 is not displaced outward in the radial direction, and excessive stress is not generated in the ribs 42 forming the bridging portion in the circumferential weakening line 32. There is no possibility that the ribs 42 forming the bridging portion of the circumferential weakening line 32 may be broken when the lid 4 is mounted as required. Ratchet claws 12a, 12b, 1
After passing 2c and 12d, the ratchet piece 50 elastically restores to its original state.

To open the mouth / neck portion 2 of the container, the lid 4 is rotated with respect to the mouth / neck portion 2 in the opening direction (counterclockwise when viewed from above in FIG. 5, leftward in FIG. 4). Thus, in the tamper-evidence skirt portion 36, the ratchet piece 50 extending downwardly when viewed in the opening direction is loosely attached to the ratchet pawls 12b and 12d. Rear surfaces 22b and 22
By acting on d, the tip portion of FIG.
Elastically bent to the right at the auxiliary locking claws 18b and 1
Pass 8d. Thereafter, the ratchet piece 50 abuts on the raised rear surfaces 16a, 16b, 16c and 16d of the ratchet pawls 12a, 12b, 12c and 12d, thereby preventing movement in the opening direction. In this case,
As clearly shown in FIG. 6, the base of each ratchet piece 50 abuts on the restraining projection 52, and also with respect to the ratchet pawls 12b and 12d, the tip of the ratchet piece 50 has the auxiliary locking pawls 18b and 18d. By being locked to the raised front surfaces 20b and 20d, the deflection of the ratchet piece 50 to the right in FIG. 6 is effectively limited, so that the ratchet piece 50 opens the ratchet pawls 12a, 12b, 12c and 12d in the opening direction. It is sufficiently reliably prevented from passing through. Thus, considerable stress is generated in the plurality of ribs 42 forming the bridging portion in the circumferential weakening line 32 formed on the skirt wall 26, and the plurality of ribs 42 are broken. Movement of the tamper-evident skirt 36 in the opening direction is reliably prevented, so that the rupture of the plurality of ribs 42 releases the sealing of the mouth / neck 2 (the annular sealing ridge 30 and the annular sealing ridge 28). Is separated sufficiently from the outer peripheral surface and the inner peripheral surface of the mouth / neck portion 2). The plurality of ribs 42 are broken so that the skirt wall 26 has a main portion 34 to a tamper-evident hem portion 36.
After being separated, the portions other than the tamper-evidence skirt portion 36 of the lid 4 are rotated in the opening direction by the cooperation of the male screw thread 6 and the female screw thread 44 and are raised to move the mouth and neck portion. 2 and thus the mouth / neck portion 2 is opened.

In the embodiment described above, a plurality of ribs 4
The circumferential weakening line 32 is formed by cutting the skirt wall 26 while leaving 2 remaining. For example, it is formed by disposing a plurality of slits extending in the circumferential direction at intervals at the time of molding. As such, it is also possible to employ a circumferential weakening line of any other suitable form such as a known circumferential weakening line. If desired, one or a few of the plurality of ribs 42 forming the bridging portion of the circumferential weakening line 32 may be made relatively strong, and the tamper-evidence skirt portion 36 may be axially aligned. When forming the extending weakening line and opening the mouth / neck portion 2, the weakening line in the axial direction is broken and the tamper-evidence hem portion 36 is expanded from the endless annular shape to the endless belt shape (thus, of the ratchet piece 50). On the other hand, in the circumferential weakening line 32, the one or a few ribs 42 that are relatively strong are maintained without breaking so that the tamper-evidence skirt 36 and the skirt wall 26 are not broken. It is also possible to keep it connected to the main part 34 so that the entire lid 4, including the tamper-evidence skirt 36, is disengaged from the mouth-neck 2 of the container.

7 and 8 show a modification of the lid 4. In this modification, an annular inclined shoulder portion 146 having an outer diameter that gradually increases is formed on the lower portion of the outer peripheral surface of the skirt wall 126, and the lower portion of the skirt wall 126 has an increased wall thickness. A circumferential weakening line 132 is formed below the wall thickness of the skirt wall 126, and the skirt wall 126 has a main portion 134 above the circumferential weakening line 132.
And the tamper-evidence skirt 136 below the circumferential weakening line 132 (the length in the axial direction of the tamper-evident skirt 136 is considerably short). An annular surrounding portion 154 is attached to the lower end of the tamper-evident skirt 136. The annular surrounding portion 154 is made to project downward from the upper end connected to the outer half in the radial direction at the lower end of the tamper-evidence hem portion 136 (thus, the thickness of the annular surrounding portion 154 is tamper-evident skirt portion 136). 1 which is thinner than the wall thickness of the skirt and includes the annular surrounding portion 154.
26 as a whole, the radially inner half at the lower end of the tamper-evidence skirt 136 forms a downwardly facing annular shoulder surface 137). An annular shoulder surface 140 facing downward is formed at the lower portion of the inner peripheral surface of the main portion 134 of the skirt wall 126. In the region from the annular shoulder surface 140 to the lower end of the tamper-evident skirt 136, a plurality of ribs 142 (e.g., 8) are formed on the inner peripheral surface of the skirt wall 126 at equal intervals in the circumferential direction. There is. Each of the ribs 142 inclines rearward when viewed in the rotation direction (right direction in FIG. 7) of the lid when the lid is attached to the mouth / neck portion 2 (FIGS. 1, 3 to 6) of the container. Extends to. The inclination angle γ of each rib 142 may be about 10 to 70 degrees. As will be clearly understood by referring to FIG. 8 together with FIG. 7, each of the ribs 142 has a substantially L-shaped cross-section, and the ribs 142 have a substantially L-shaped cross-section. It has a ridge 143 that projects radially inward from the rear end when viewed in the direction of rotation of the lid when it is mounted. Skirt wall 126
The circumferential weakening line 132 that divides the main part 134 and the tamper-evidence hem 136 into the skirt wall 126.
A cutting blade (not shown) is actuated from the outer peripheral surface side of the annular shoulder surface 140 and the tamper-evidence hem 13
In the region between the lower end of the rib 6 and the lower end of the rib 6, only the radially inner portion of the rib 142, that is, the protruding portion 143 is left and cut. The ridge portion 143 of the rib 142, which is left without being cut, is formed on the main portion 134 of the skirt wall 126 to the tamper-evidence hem portion 1.
A bridge portion connecting 36 is formed.

In the modification shown in FIGS. 7 and 8, the ratchet piece 150 and the restraining protrusion 152 are extended downward from the rib 142. Each of the ratchet pieces 150 is viewed in the rotation direction of the lid (rightward in FIG. 7) when the lid is attached to the mouth / neck portion 2 (FIG. 1, FIG. 3 to FIG. 6) of the container in each of the ribs 142. The rib 142 extends downward from the latter half of the rib 142 to a position slightly above the lower end of the annular surrounding portion 154. The cross-sectional shape of the ratchet piece 150 matches the cross-sectional shape of the rear half of the rib 142 when viewed in the rotation direction, and is substantially L-shaped. Each of the restraining protrusions 152 located near the base of the ratchet piece 150 and located on the front side thereof in the rotation direction has the ribs 142 when viewed in the rotation direction.
It is projected downward from the front part of. Restraining protrusion 15
The downward projection length of 2 may be a little (for example, about 5 to 1/7 of the downward projection length of the ratchet piece 150). The cross-sectional shape of the restraining protrusion 152 is a rectangle, which is matched with the cross-sectional shape of the front portion of the rib 142 when viewed in the rotation direction. The ratchet piece 150 and the restraining projection 152 follow the rib 142 downwardly, and thus rearward as viewed in the direction of rotation of the lid when the lid is attached to the mouth / neck portion 2 (FIGS. 1, 3 to 6) of the container, It extends downward with a tilt angle γ which may be 10 to 70 degrees. As in the case of the embodiment described with reference to FIGS. 1 to 6, the circumferential distance L2 between the ratchet piece 150 and the restraining projection 152 attached thereto at the upper end of the ratchet piece 150 is 0.
It is about 5 to 1.5 mm, and the circumferential distance L3 between the ratchet piece 150 at the upper end of the ratchet piece 150 and the restraining protrusion 152 attached to the ratchet piece 150 adjacent to the ratchet piece 150 (that is, the ratchet piece 150 and the mouth / neck portion 2). The circumferential interval L3) between the lid and the restraining protrusion 152 located rearward in the rotational direction of the lid with respect to the mouth / neck portion 2 when the lid is attached is set to be slightly larger than the extension length L4 of the ratchet piece 150. Is preferred. As can be clearly understood from FIG. 7, the annular surrounding portion 154 includes the ratchet pieces 150 and 1.
They are located radially outwardly with respect to 52 and surround them. The modified example of the lid as described above shown in FIGS. 7 and 8 is also used in substantially the same manner as the lid 4 in the above-described embodiment shown in FIGS. 1 to 6 and has substantially the same operation.

[0029]

In the combination of the container and the lid of the present invention, when the lid is attached to the mouth and neck of the container to seal the mouth and neck, the circumferential weakening line formed on the skirt wall is When the container is opened, the circumferential weakening line formed on the skirt wall prior to the release of the sealing of the opening and neck can be easily and securely prevented. Fractured as required.

[Brief description of drawings]

FIG. 1 is a side view of the mouth and neck of a container in a preferred embodiment of a combination constructed in accordance with the present invention, with a partial cross-section.

FIG. 2 is a side view, partly in section, of the lid of the preferred embodiment of the combination constructed in accordance with the present invention.

FIG. 3 is a plan view of the mouth / neck portion of FIG. 1.

4 is a partial cross-sectional view showing the mutual relationship between the ratchet claw in the mouth and neck of FIG. 1 and the ratchet piece in the lid of FIG.

5 is a side view showing a state in which the lid of FIG. 2 is attached to the mouth and neck of FIG. 1 in a partial cross section.

6 is a partial cross-sectional view showing the mutual relationship between the ratchet claw in the mouth and neck portion of FIG. 1 and the ratchet piece in the lid of FIG. 2 when opening the mouth and neck portion of the container.

FIG. 7 is a partial cross-sectional view showing a modified example of the lid.

8 is a partial cross-sectional view of a rib of the lid of FIG. 7 taken along a circumferential break line.

[Explanation of symbols]

2: Mouth neck part 4: Lid 6: Male screw thread 10: Annular flange 12a, 12b, 12c, 12d: Ratchet claw 14a, 14b, 14c, 14d: Front of ratchet claw 16a, 16b, 16c, 16d: Ratchet claw Rear surface 18b, 18d: Auxiliary locking claw 20b, 20d: Front surface of the auxiliary locking claw 22b, 22d: Rear surface of the auxiliary locking claw 24: Top wall 26: Skirt wall 32: Circumferential weakening line 34: Main part of skirt wall 36: Tamper evidence hem 42: Rib (bridge portion in the circumferential weakening line) 44: Female thread 50: Ratchet piece 52: Restraining protrusion 54: Annular surrounding portion 126: Skirt wall 132: Circumferential weakening line 134: Main part of skirt wall 136: Tamper evidence hem 142: Rib 143: Rib ridge (bridge part in circumferential weakening line) 15 : Ratchet piece 152: catch protrusion 154: annular surrounding portion

Claims (13)

[Claims] 1. A container in which a male thread is arranged on the outer peripheral surface of the mouth-neck portion, a top surface wall and a cylindrical skirt wall hanging down from the top surface wall, the skirt wall extending in the circumferential direction. An existing circumferential weakening line is formed, and the skirt wall is divided into a main part above the circumferential weakening line and a tamper-evidence skirt below the circumferential weakening line,
In combination with a lid having an internal thread formed on the inner peripheral surface of the main portion of the skirt wall, the internal thread being screwed to the external thread arranged in the mouth and neck of the container, The outer peripheral surface of the mouth-neck portion of the container is inclined upward toward the rear when viewed in the relative rotation direction of the container with respect to the lid when the male screw and the female screw are screwed together. A plurality of ratchet pawls having a gradually extending front surface and an upwardly rising rear surface are formed, and the tamper-evidence skirt portion of the lid extends downward at a circumferential interval, A plurality of ratchet pieces are formed to cooperate with the ratchet pawl, and further, the ratchet is viewed in a direction of relative rotation of the lid with respect to the container when the male screw and the female screw are screwed together. Located on the front side of the piece and close to the base of the ratchet piece, Combinations said ratchet piece forward as viewed in the relative direction of rotation of the lid relative to the container when occupied combined threadably catch protrusion for restricting flexing elastically is formed, it is characterized. 2. The outer peripheral surface of the mouth and neck of the container is further provided with:
When viewed in the relative rotation direction of the container with respect to the lid when the male screw and the female screw are screwed together, the male screw is located behind the ratchet claw and close to the ratchet claw, When viewed in the direction of relative rotation of the container with respect to the lid when screwing the screw thread and the female screw thread, the container has a steep front surface extending upward and a gentle rear surface extending upward toward the front. An auxiliary locking claw lower than the upper end of the ratchet claw is formed on the upper end of the ratchet claw, and the lid is relatively attached to the container in a direction to release the screw engagement between the male screw and the female screw. When the ratchet piece is rotated and brought into contact with the ratchet pawl, the tip end portion of the ratchet piece is positioned between the ratchet pawl and the auxiliary locking pawl, and the tip end portion of the ratchet piece is attached to the auxiliary engaging member. The male thread and the female thread are screwed together by being locked to the pawl. The ratchet piece forward as viewed in the relative direction of rotation of the lid relative to the container when it is restricted to flex resiliently, claim 1 combination according. 3. An outer peripheral surface of the mouth-neck portion of the container is formed with a projecting flange protruding in a radial direction below the male screw, and the ratchet pawl and the auxiliary locking pawl are The combination according to claim 2, which is formed on an upper surface of the overhang flange. 4. The inclination angle α of the front surface of each of the ratchet pawls is 25 to 65 degrees, and the inclination angle β of the rear surface of each of the ratchet pawls is 70 to 140 degrees.
The combination according to any one of 1 to 3. 5. The inclination angle α'of the front surface of the auxiliary locking claw is 7
The combination according to any one of claims 2 to 4, wherein the auxiliary locking pawl has a rear surface inclination angle β'of 25 to 65 degrees. 6. Each of the ratchet pieces extends downwardly from the rear by 10 to 70 when viewed in the direction of relative rotation of the lid with respect to the container when the male screw and the female screw are screwed together. The inclined extension is made at an inclination angle γ of degrees.
The combination according to any one of 1 to 5. 7. The combination according to claim 1, wherein the skirt wall is provided with an annular surrounding portion which is connected to the tamper evidence skirt and surrounds the ratchet piece. 8. A container having male threads arranged on the outer peripheral surface of the mouth-neck portion, a top wall and a cylindrical skirt wall hanging from the top wall, the skirt wall extending in the circumferential direction. An existing circumferential weakening line is formed, and the skirt wall is divided into a main part above the circumferential weakening line and a tamper-evidence skirt below the circumferential weakening line,
In combination with a lid having an internal thread formed on the inner peripheral surface of the main portion of the skirt wall, the internal thread being screwed to the external thread arranged in the mouth and neck of the container, The outer peripheral surface of the mouth-neck portion of the container is inclined upward toward the rear when viewed in the relative rotation direction of the container with respect to the lid when the male screw and the female screw are screwed together. A plurality of ratchet pawls having a gradually extending front surface and an upwardly rising rear surface are formed, and the tamper-evidence skirt portion of the lid extends downward at a circumferential interval, A plurality of ratchet pieces that cooperate with the ratchet pawl are formed, and the outer peripheral surface of the mouth-neck portion of the container is further formed when the male thread and the female thread are screwed together. Seen in the direction of relative rotation of the container with respect to the lid, behind the ratchet pawl and close to the ratchet pawl. However, when viewed in the direction of relative rotation of the container with respect to the lid when the male thread and the female thread are screwed together, a steep front surface extending upward and a gentle rear surface extending upward toward the front are provided. And an auxiliary locking claw whose upper end is lower than the upper end of the ratchet claw is formed, and the lid is attached to the container in a direction to release the screw engagement between the male screw and the female screw. When the ratchet piece is brought into contact with the ratchet claw by rotating the ratchet relatively, the tip of the ratchet piece is positioned between the ratchet claw and the auxiliary locking claw, and the tip of the ratchet piece is positioned. Is locked to the auxiliary locking claw so that the ratchet piece is elastically forward when viewed in the relative rotation direction of the lid with respect to the container when the male screw and the female screw are screwed together. A combination characterized in that it is restricted from bending flexibly. 9. An outer peripheral surface of the mouth-neck portion of the container is formed with a projecting flange projecting in a radial direction below the male thread, and the ratchet pawl and the auxiliary locking pawl are The combination according to claim 8, which is formed on the upper surface of the overhang flange. 10. The inclination angle α of the front surface of each of the ratchet pawls is 25 to 65 degrees, and the inclination angle β of the rear surface of each of the ratchet pawls is 70 to 140 degrees. Combination of. 11. The inclination angle α ′ of the front surface of the auxiliary locking claw is 70 to 140 degrees, and the inclination angle β ′ of the rear surface of the auxiliary locking claw is 25 to 65 degrees. Combination described in any of the above. 12. When viewed in the direction of relative rotation of the lid with respect to the container when the male thread and the female thread are screwed together, each of the ratchet pieces extends downwardly from 10 to 70 rearward.
12. A combination as claimed in any one of claims 8 to 11 extending obliquely at an inclination angle γ of degrees. 13. The combination according to claim 1, wherein the skirt wall is provided with an annular surrounding portion connected to the tamper-evidence skirt and surrounding the ratchet piece.