JPH072263A - Combination of container and cap - Google Patents

Abstract

PURPOSE:To securely maintain a yielding line in the circumferential direction made in the skirt wall of a cap, without breaking it when attaching the cap to the neck of a container mouth, and break the line easily and securely prior to the undoing of the sealing the neck of the mouth when opening the neck of the mouth. CONSTITUTION:On the neck of a container mouth, a plurality of ratchet pawls 12 projecting upward, not radially outward, are made at intervals in the circumferential direction. Each ratchet pawl 12 has a gentle front surface 14 and a sheer rear surface 16. On the bottom 30 of the tamper evident of a cap, a plurality of ratchet pieces 44 extending downward at intervals in the circumferential direction and moving cooperatively with the ratchet pawls 12 on the neck of the mouth 12 are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination of a container having a tamper-evidence characteristic (clarification of mischief) and a lid.

[0002]

2. Description of the Related Art Containers and lids having tamper-evidence characteristics (characteristics in which, when a mischief such as unsealing the container and mixing foreign matter into the contents is added, a trace of such mischief is clearly shown). As a combination with
No. 8 and Japanese Utility Model Publication No. 56-31559 disclose a combination of a container and a lid having a ratchet mechanism. 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,
Without breaking one or a few bridges, the tamper-evidence hem is released from an endless annular shape to an endless belt shape, the cooperation between the ratchet pawl and the ratchet piece is released, and a non-breaking bridge The tamper-evident hem, which is connected to the main part of the skirt wall via the, is also lifted with rotation and separated from the mouth and 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, in the present invention, each of a plurality of ratchet pawls arranged on the outer peripheral surface of the mouth and neck of the container is formed with a male thread. When viewed in the direction of relative rotation of the container with respect to the lid when the female screw thread is screwed, a gentle front surface extending obliquely upward (not radially outward) and backward (not radially outward) A raised rear surface that extends upward (rather than one side), and each of the plurality of ratchet pieces disposed on the tamper-evidence hem of the lid is circumferentially spaced from the tamper-evident hem. Place it at the bottom and extend it downward.

That is, according to 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 and neck, a top wall and A cylindrical skirt wall is hung from the top wall, and a circumferential weakening line extending in the circumferential direction is formed on the skirt wall, and the skirt wall and the main portion above the circumferential weakening line and the main portion above the circumferential weakening line. It is divided into a tamper-evidence skirt below the circumferential weakening line, and is screwed onto a male thread disposed on the mouth and neck of the container on the inner peripheral surface of the main portion of the skirt wall. In combination with a lid in which a female thread to be squeezed is formed, the outer surface of the mouth-neck portion of the container is fitted to the lid when the male thread and the female thread are screwed together. When viewed in the relative rotation direction of the container, a gradual front surface that extends backward and inclines upward A plurality of ratchet pawls having a raised rear surface extending inwardly are formed, and the tamper-evidence skirt portion of the lid extends downward at a circumferential interval and cooperates with the ratchet pawls. A combination is provided in which a plurality of ratchet pieces are formed.

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 110 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 20 to 70 degrees. Each of the ratchet pieces has a thick base and a thin flexible portion that follows,
In a state where the male thread and the female thread are screwed together as required, the lower end of the thick-walled base portion of the ratchet piece is vertically above the upper end of the ratchet pawl by a predetermined distance G1. A vertical gap G2 exists between the upper end of the ratchet piece and the upper end of the ratchet pawl, and the thickness T of the flexible portion of the ratchet piece is larger than the gap G1 and smaller than the gap G2. It is preferable that the circumferential distance L1 between the pieces is larger than the length L2 of the flexible portion of the ratchet piece. Further, it is convenient that the thickness of the flexible portion of the ratchet piece gradually decreases toward the free end. The ratchet piece extends downward from the lower end of the tamper-evidence skirt, and the skirt wall is provided with an annular surrounding portion connected to the outer peripheral surface of the tamper-evidence skirt and surrounding the ratchet piece. Is preferred. The annular surrounding portion may extend radially outward from the outer peripheral surface of the tamper-evidence skirt and then extend downward. A break line may be formed from a lower end of the annular surrounding portion to the circumferential weakening line of the skirt wall, and a tab may be formed in the annular surrounding portion adjacent to the breaking line.

[0012]

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. Although some force acting in the circumferential direction or upward is transmitted from the ratchet piece to the tamper-evidence skirt, the tamper-evident skirt is not displaced radially outward by the force.
Therefore, when the lid is attached to the mouth and neck of the container, it is possible to surely prevent the bridge portion in the circumferential weakening line from being broken due to excessive stress. When rotating the lid in the opposite direction to open the mouth and neck, the raised rear surface of the ratchet pawl on the mouth and neck cooperates with the ratchet piece on the lid to ensure rotation of the tamper-evidence hem. As a result, the bridging portion at the circumferential break line formed on the skirt wall is broken easily as required.

[0013]

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 of 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 12 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 ratchets 12 can be formed on the annular flange 10 at appropriate intervals in the circumferential direction. Each of the ratchet claws 12 is rearward when viewed in the rotation direction of the mouth / neck portion 2 with respect to the lid 4 (counterclockwise in FIG. 3, rightward in FIG. 4) when the lid 4 is attached to the mouth / neck portion 2. It has a gradual front surface 14 that extends upwardly and a steep rear surface 16 that extends upward. The inclination angle α of the front surface 14 of the ratchet pawl 12 with respect to the upper surface of the annular flange 10 is 25 to 65 degrees,
The inclination angle β of the rear surface 16 of the ratchet pawl 12 with respect to the upper surface of the annular flange 10 is conveniently between 70 and 110 degrees.

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 18 and this top wall 18.
And a cylindrical skirt wall 20 depending from the peripheral edge of the. An annular sealing ridge 22 that hangs downward is formed on the inner surface of the top wall 18, and an annular sealing ridge 2 is formed in the boundary region between the outer peripheral edge of the inner wall of the top wall 18 and the upper end of the inner peripheral surface of the skirt wall 20.
4 are formed. A circumferential weakening line 26 extending in the circumferential direction is formed in the lower half of the skirt wall 20,
The skirt wall 20 is divided into a main portion 28 above the circumferential weakening line 26 and a tamper-evidence skirt portion 30 below the circumferential weakening line 26. On the inner peripheral surface of the skirt wall 20, two downwardly facing annular shoulder portions 32 and 34 are formed, and a plurality of ribs 36 extending downward from the lower shoulder portion 34 by a relatively short length are circumferentially formed. It is formed at intervals in the direction. The circumferential weakening line 26 is formed by cutting the skirt wall 20 while leaving the rib 36 in the region where the plurality of ribs 36 are formed. The ribs 36 form a so-called bridging portion, and the tamper-evidence skirt 30 is connected to the main portion 28 via the ribs 36. A female thread 38 is formed on the inner peripheral surface of the main portion 28 of the skirt wall 20. An annular inclined shoulder portion 40 is formed on the outer peripheral surface of the main portion 28 of the skirt wall 20, and a slip prevention unevenness 42 is formed in a region above the shoulder portion 40.

Continuing the description with reference to FIG. 4 together with FIG. 2,
A plurality of ratchet pieces 44 (for example, 24 pieces) extending downward from the lower end of the tamper-evidence skirt 30 are formed at equal intervals in the circumferential direction. Each of the ratchet pieces 44 is used when the lid 4 is attached to the mouth / neck portion 2 of the container,
When viewed in the rotational direction of the lid 4 with respect to the mouth / neck portion 2 (clockwise when viewed from above in FIG. 2, leftward in FIG. 4), it is preferable that the lid 4 is inclined rearward and extends downward. The inclination angle γ of the ratchet piece 44 is preferably 20 to 70. As clearly shown in FIG. 4, each of the ratchet pieces 44 has a thick base 46 and a thin flexure 48. In a state where the lid 4 is attached to the mouth / neck portion 2 as required (state shown in FIGS. 4 and 5) as described later, the lower end of the thick-walled base portion 46 of the ratchet piece 44 is the mouth / neck portion 2.
Is vertically above the upper end of the ratchet pawl 12 in the vertical direction by a predetermined gap G1, and there is a vertical gap G2 between the upper end of the ratchet piece 44 and the upper end of the ratchet pawl 12 in the mouth / neck portion 2. The thickness T of the thin-walled flexible portion 48 of the piece 44 is larger than the gap G1 and smaller than the space G2, and the circumferential distance L1 of the ratchet piece 44 is the length L2 of the thin-walled flexible portion 48 of the ratchet piece 44.
It is preferable that it is set larger than the above. Conveniently, the wall thickness of the thin flexure 48 of the ratchet piece 44 is gradually reduced towards the free end.

Continuing the description with reference to FIG. 2, an annular surrounding portion 50 is attached to the outer peripheral surface of the tamper-evidence skirt portion 30. The annular surrounding portion 50 extends slightly outward in the radial direction from the outer periphery of the tamper-evint hem portion 30 and then extends downward to surround the ratchet piece 44.

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,
It is rotated to the left in FIG. 4) so that the male thread 6 of the mouth / neck portion 2 is screwed onto the female thread 38 of the lid 4. The lid 4 is lowered with rotation, and when the male thread 6 and the female thread 38 are screwed to the state shown in FIG.
4 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 22 of the lid 4 is inserted into the mouth / neck portion 2 so as to be brought into close contact with the inner peripheral surface of the mouth / neck portion 2. The mouth / neck 2 is sealed. In the latter half of the wearing operation of the lid 4, the ratchet pawl 12 of the mouth / neck portion 2 and the ratchet piece 44 of the lid 4 interfere with each other, but as shown by the two-dot chain line in FIG. The thin flexible portion 48 of the ratchet piece 44 elastically bends backward by acting on the gentle front surface 14 of the ratchet piece 44.
Can pass ratchet pawl 12 with sufficient ease. Since the ratchet piece 44 extends downward as viewed in the opening rotation direction, the ratchet piece 4 is inclined backward.
4 can bend backwards easily enough. The circumferential interval L1 of the ratchet piece 44 is larger than the length L2 of the thin-walled bending portion 48 of the ratchet piece 44, and the vertical distance G2 between the upper end of the ratchet piece 44 and the upper end of the ratchet pawl 12 is the thin-walled bending portion 48 of the ratchet piece 44. Since the thickness is larger than the wall thickness of the ratchet piece 44, the thin-walled bent portion 48 of the ratchet piece 44 bent backward is housed between the thick-walled base portions 46 of the adjacent ratchet pieces 44. When the ratchet piece 44 bends rearward in the circumferential direction and passes through the ratchet pawl 12, the tamper evidence hem 30
Although some force acting in the circumferential direction or in the upward direction is transmitted to the tamper evidence, the tamper-evidence skirt portion 30 is not displaced outward in the radial direction by such a force. Therefore, there is no possibility that the ribs 36 forming the bridging portion of the circumferential weakening line 26 will be broken when the lid 4 is mounted on the mouth / neck portion 2 of the container as required. After passing through the ratchet pawl 12, the ratchet piece 44 elastically restores to its original state.

In order 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, rightward in FIG. 4). Thus, in the tamper-evidence skirt 30, the thin-walled flexible portion 48 of the ratchet piece 44 extending downwardly in the opening direction contacts the raised rear surface 16 of the ratchet pawl 12, This prevents movement in the opening direction. As described above, the thick base portion 46 of the ratchet piece 44
If the gap G1 between the lower end of the ratchet claw 12 and the upper end of the ratchet pawl 12 is selected to be smaller than the thickness of the thin-walled bending portion 48 of the ratchet piece 44, even if the thin-walled bending portion 48 of the ratchet piece 44 is largely bent, 44 is ratchet claw 12
Cannot be passed in the opening direction, and the movement of the tamper-evidence skirt portion 30 in the opening direction can be prevented more reliably. Therefore, the plurality of ribs 36 forming the bridging portion in the circumferential weakening line 26 formed on the skirt wall 20.
To generate a considerable stress, and the ribs 36 are broken. Movement of the tamper-evidence skirt 30 in the opening direction is reliably prevented, so that the rupture of the plurality of ribs 36 releases the seal of the mouth / neck portion 2 (the annular seal ridge 24 and the annular seal ridge 22). Is separated sufficiently from the outer peripheral surface and the inner peripheral surface of the mouth / neck portion 2). After the plurality of ribs 36 are broken and the tamper-evidence skirt 30 is separated from the main portion 28 of the skirt wall 20, the portions of the lid 4 other than the tamper-evidence skirt 30 are connected to the male thread 6. By cooperation with the female thread 38, it is rotated in the opening direction and lifted to be separated from the mouth / neck portion 2, and thus the mouth / neck portion 2 is opened.

In the embodiment described above, a plurality of ribs 3
The circumferential weakening line 26 is formed by cutting the skirt wall 20 while leaving 6 remaining. For example, it is formed by disposing a plurality of slits extending in the circumferential direction at intervals during the molding. It is also possible to employ the circumferential weakening line in other suitable forms such as the known circumferential weakening line.

If desired, one or a few of the plurality of ribs 36 forming the bridging portion of the circumferential weakening line 26 may be made relatively strong, and the tamper evidence skirt 30 may be axially aligned. When forming the extending weakening line and opening the mouth / neck portion 2, the axial weakening line is broken and the tamper-evidence hem portion 30 is expanded from the endless annular shape to the endless belt shape (thus, of the ratchet piece 44). (Movement in the opening direction is allowed), while one or a few ribs 36 are made relatively strong in the circumferential weakening line 26.
Remains unbroken and continues to connect the tamper-evidence hem 30 to the main portion 28 of the skirt 20, and the entire lid 4 including the tamper-evidence hem 30 is disengaged from the mouth-neck 2 of the container. It can also be done like this.

FIG. 6 shows a modification of the lid 4. In this modification, the break line 5 extends upward from the lower end of the annular surrounding portion 50 to the vicinity of the upper end thereof, then extends in the circumferential direction, and further extends upward to reach the circumferential weakening line 26.
2 is formed. The break line 52 may be a so-called perforation or a score, but in the illustrated modification, it is formed of a slit. In the modified example,
A tab 54 protruding upward from the annular surrounding portion 50 is formed adjacent to the breaking line 52. In such a modified example, when opening the mouth / neck portion 2 of the container, the tab 54 is grasped before the lid 4 is rotated in the opening direction, as shown in FIG.
When viewed from above, it is pulled in the counterclockwise direction, whereby the plurality of ribs 36 forming the bridging portion in the circumferential weakening line 26 can be broken. Other configurations of the modification shown in FIG. 6 are substantially the same as those of the embodiment shown in FIGS. 1 to 5.

[0025]

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.

FIG. 6 is a side view of a modification of the lid, showing a part of the lid in section.

[Explanation of symbols]

 2: Mouth neck 4: Lid 6: Male thread 10: Annular flange 12: Ratchet claw 14: Ratchet claw front 16: Ratchet claw back 18: Top wall 20: Skirt wall 26: Circumferential weakening line 28: Skirt Main part of the wall 30: Tamper evidence hem 36: Rib (bridge part in the circumferential weakening line) 38: Female thread 44: Ratchet piece 46: Thick base of ratchet piece 48: Thin ratchet of ratchet piece 50 : Annular surrounding part 52: Break line 54: Tab

Claims (9)

[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 a female thread formed on the inner peripheral surface of the main portion of the skirt wall, the female thread being screwed into a male thread arranged on the mouth and neck of the container, On the outer peripheral surface of the mouth-neck portion, when the male screw thread and the female screw thread are screwed together, when viewed in the relative rotation direction of the container with respect to the lid, the container is inclined upward toward the rear. A plurality of ratchet pawls having a gently extending front surface and a raised rear surface extending upward are formed, and the tamper-evidence skirt portion of the lid extends downward at a circumferential interval, A combination characterized in that a plurality of ratchet pieces cooperating with the ratchet pawl are formed. 2. 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 screw, and the ratchet pawl is provided on an upper surface of the projecting flange. The combination of claim 1, which is formed. 3. The tilt angle α of the front surface of each of the ratchet pawls is 25 to 65 degrees, and the tilt angle β of the rear surface of each of the ratchet pawls is 70 to 110 degrees. The combination described. 4. When viewed from the direction of relative rotation of the lid with respect to the container when the male screw thread and the female screw thread are screwed together, each of the ratchet pieces extends downward from 20 to 20 rearward. 70
The combination according to any one of claims 1 to 3, wherein the combination is inclined and extends at an inclination angle γ of degrees. 5. Each ratchet piece has a thick base portion and a thin flexible portion following the thick base portion, and the ratchet pieces are screwed together as required with the male thread and the female thread. The lower end of the thick-walled base portion is located vertically above the upper end of the ratchet pawl by a predetermined distance G1, and the vertical gap G is provided between the upper end of the ratchet piece and the upper end of the ratchet pawl.
2 exists, the thickness T of the flexible portion of the ratchet piece is larger than the gap G1 and smaller than the gap G2, and the circumferential distance L1 of the ratchet piece is larger than the length L2 of the flexible portion of the ratchet piece. The combination of claim 4, which is also large. 6. The combination according to claim 5, wherein the thickness of the flexible portion of the ratchet piece gradually decreases toward the free end. 7. The annular surrounding portion that extends downward from the lower end of the tamper-evidence skirt and is connected to the outer peripheral surface of the tamper-evident skirt on the skirt wall and surrounds the ratchet piece. Is attached, Claim 1
The combination according to any one of 1 to 6. 8. The combination of claim 7, wherein the annular enclosure extends radially outward from an outer peripheral surface of the tamper-evidence skirt and then downwardly. 9. A breaking line is formed from a lower end of the annular surrounding portion to the circumferential weakening line of the skirt wall, and a tab is formed in the annular surrounding portion adjacent to the breaking line. A combination according to claim 7 or 8.