JPH08113254A - Closure device - Google Patents

Abstract

PURPOSE: To provide the closure device having a cap which can exhibit a fair tamper-evident property. CONSTITUTION: This container 70 comprises male screw threads 71 on the outside circumferential face of a mouth and a cap 50 to be mounted on the container 70 and has a TE ring 58 that is torn off from the cap main body when the container is opened. Two or more catch claws 74 are projected upward from the outside of a flange 73 of the container 70 in the circumferential direction of the flange 73 and the TE ring 58 has radially-protruding stoppers 62 on the outside circumferential face. When the cap 50 is mounted on the mouth of the container 70, the side faces of the protruding stoppers 62 of the cap 50 are caught on the contact faces provided on the catch claws 74 of the flange 73, so that the TE ring 58 is prevented from turning in the opening direction of the cap 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having a threaded portion formed on the outer periphery of a mouth portion, and a tamper evidence ring portion screwed into the mouth portion of the container and connected to the lower portion of the cylinder portion when the container is opened. The present invention relates to a closure device which is separated from a main part of a cap and has a tamper-evidence synthetic resin cap that indicates opening.

[0002]

2. Description of the Related Art Conventionally, a container having a threaded portion at its mouth and a cap opening ring portion which is screwed into the mouth of the container and is connected to the lower portion of the cylinder when the cap is opened. Various types of closure devices have been proposed as a closure device that is composed of a synthetic resin cap that has a function of displaying the opening of the plug by disconnecting it (referred to as pill-fur proof property or tamper-evidence property).

FIG. 7 shows, as an example of a conventional closing device, a closing device composed of a cap and a container corresponding thereto, which is described in Japanese Patent Publication No. 52-14677.
This closure device comprises a top portion 3, a tubular portion 4 extending downward from the peripheral edge of the top portion and having a screw 5 on the inside thereof, and a reverse portion of the container check projection 14 and the cap check projection 8 when the cap body 2 is rotated in the opening direction. A cap 1 provided with a bridge 6 that is broken by a stopping force and an annular body 7 that is partitioned from the cap body 2 by the bridge 6, and a male screw 13 is formed in the mouth 12 so that the cap 1 is mounted. In addition, there is described a closing device including the container 11 in which the container check projection 14 is formed on the lower portion of the male screw 13. In this closing device, when the cap 1 is rotated in the opening direction, the cap check projection 8 provided on the inner surface of the annular body 7 of the cap 1 engages with the container check projection 14 provided on the container 11, The rotation of the ring-shaped body 7 is prevented by this, the bridge 6 is cut, and the ring-shaped body 7 is separated from the cap body 2.

FIG. 8 shows a synthetic resin container lid (cap) described in Japanese Examined Patent Publication No. 1-30702 as another example of a conventional closing device.
A container having a container opening 30 in which a jaw 32 provided below the male screw 31 is formed, and a cap 20 attached to the container are described. This cap 20
Is provided with a top plate portion 21 and a tubular portion 22 that hangs down from the peripheral portion thereof, and the tubular portion 22 has a plurality of slits 23 extending in the circumferential direction and a break defined by a bridge 24 existing between the slits. A line 25 is formed, and the tubular portion 22 is divided into a main portion 26 above the breaking line 25 and a pill fur proof hem portion 27 below the breaking line, and the container mouth portion 30 is formed on the inner surface of the main portion 26. Is formed with a screw portion 28 that is screwed into the male screw 31 of the pill fur proof, and a plurality of protrusions 2 that protrude inward in the radial direction are formed on the inner surface of the pill fur proof hem portion 27.
9 is formed at a position apart from the bridge 24. As shown in FIG. 9, the protrusion 29 is formed in such a shape that the amount of protrusion inward in the radial direction gradually increases from the lower side to the upper side in the axial direction.

In this closing device, when the cap 20 is attached to the container mouth 30, the pill fur proof hem 27
Elastically deforms, and the projection 29 passes over the jaw portion 32 of the container mouth portion 30 and enters below. Then, when the cap 20 attached to the container mouth 30 is rotated in the opening direction, the protrusion 29 provided on the inner surface of the pill fur proof hem 27 is locked to the lower end of the jaw of the container mouth 30, and the pill Prevents upward movement of the fur proof hem 27, resulting in a cap 2
The tensile force acts on the bridge 24 connecting the main part 26 of 0 and the pilfer proof skirt 27, the bridge 24 is broken, and the pilfer proof skirt 27 is separated.

[0006]

However, the above-described conventional closing device has the following problems. The closure device described in the former Japanese Patent Publication No. 52-14677 discloses a cap check projection 8 or a container mouth 11 formed on the inner surface of the annular body 7 when the cap 1 is mounted on the container mouth 11. It is necessary to compress the formed container check projections 14 and rotate them relative to each other, but in order to compress these check projections, it is necessary to apply a considerable torque to the cap, and therefore the cap 1 It is relatively difficult to install and the bridge is broken when the cap is installed due to a considerably large torque applied to the cap. In order to solve the drawback, it is conceivable to reduce the amount of protrusion of the check protrusion or to make the check protrusion soft or flexible. In this case, the cap 1 is attached to the container mouth 11. After that, the engagement between the cap check projection 8 and the container check projection 14 becomes insufficient, and the tamper evidence property due to the unsealing display is impaired.

The cap 20 described in Japanese Patent Publication No. 1-30702 is the pill fur proof hem 2.
By providing the protrusion 29 of 7 and the bridge 24 separately, the pill fur proof skirt 27 is provided when the protrusion 29 gets over the jaw 32 of the container mouth 30 when the cap 20 is mounted on the container mouth 30. Bridge 2 even if elastically deformed
4 is prevented from breaking. However, when the cap 20 is opened, the protrusion 29 provided on the inner surface of the pill fur proof skirt 27 is locked to the lower end of the jaw of the container mouth 30 to prevent the pill fur proof skirt 27 from moving upward. Since the structure is such that the bridge 24 is blocked by the tensile force acting on the bridge 24 connecting the main portion 26 of the cap 20 and the pill fur proof skirt 27 as a result,
If the cap is made of synthetic resin, the bridge 24
When a tensile force is applied to the bridge 24, the bridge 24 is easily stretched, and in order to break the bridge 24, it is necessary to rotate the cap body by a considerable angle in the opening direction.

In this kind of tamper-evidence cap, when the cap attached to the container mouth is turned in the opening direction from the initial position, the upper end of the container mouth separates from the inner surface of the cap or the liner. The rotation angle (seal release angle; hereinafter referred to as SR) at the time when the sealing property of the container is released, and the bridge when the cap attached to the container mouth is rotated from the initial position in the opening direction. Rotation angle up to the cutting position (bridge break angle;
(Hereinafter referred to as “BBAA”), the relationship between SRBA-BBAA
= 0 degrees or more, preferably 30 degrees or more. That is, when the cap is opened, it is desirable that the bridge be cut before the upper end of the container opening is separated from the liner or the like to release the hermetic seal. In the cap 20 described above, BBA may become large due to the extension of the bridge 24, and SRBA-BBAA may become 0 degrees or less, which improves the tamper evidence. There was a point to be improved from the viewpoint.

Further, the cap 20 is attached to the container mouth 30.
When the pill fur proof hem 27 is elastically deformed when it is mounted on the chin, the protrusion 29 causes the protrusion 29 to move to the jaw 3
If the mechanical strength of the bridge 24 is weak, the bridge 24 may be broken when the cap is screwed, even if the projection 29 of the pill fur proof skirt 27 and the bridge 24 are provided separately. In order to prevent such inconvenience, the strength of the bridge 24 should be increased, or the breaking line 2 as shown by reference numerals 34 and 35 in FIG.
5. Engagement pieces are provided above and below the bridge 5, and when the cap is screwed, the bridge 2
It is conceivable to prevent 4 from being cut. However, if the strength of the bridge 24 is increased, it may be difficult to open the cap, or the bridge 24 may not be cut, and the tamper evidence property may be impaired. Further, it is not possible to provide the engaging pieces above and below the breaking line 25. It is difficult in the normal cap manufacturing process, a special manufacturing process is indispensable, and the manufacturing cost is increased.

The present invention has been made in view of the above circumstances, has a simple structure, can solve the problems with the conventional products as described above, and has a cap provided with a cap capable of exhibiting good tamper evidence. The purpose is to provide the device.

[0011]

SUMMARY OF THE INVENTION A closure device according to the present invention comprises a container having a screw portion formed on the outer periphery of a mouth and a flange portion formed at a neck portion, a top plate portion, and a cylindrical portion hanging from the periphery thereof. And a tamper evidence ring section formed by a horizontal score leaving a plurality of bridges at the bottom of the tubular section, and a threaded section that is screwed into the threaded section of the container on the inner surface of the tubular section. In a closing device including a cap, a plurality of locking claws projecting upward are provided along the circumferential direction on the upper surface side of the flange portion of the container, and a tamper evidence ring portion of the cap has a diameter on the outer peripheral surface thereof. One side of the locking projection of the cap is locked to the abutment surface of the locking claw of the flange when the cap is attached to the container mouth. Then tamper In which rotation of the cap removal direction Bidensuringu portion is configured to be blocked.

In the closing device of the present invention, the locking claw provided on the flange portion of the container may have a surface opposite to the contact surface as an inclined surface whose thickness gradually decreases inward in the radial direction.

Further, in the closing device of the present invention, when the locking projection of the cap is mounted on the mouth of the container by rotating the cap in the closing direction, the locking projection contacts the locking claw provided on the flange of the container in the radial direction. Displaces inward, and when the cap with the container mouth is turned in the opening direction, the locking projection of the cap locks on the contact surface of the locking claw in the opening direction of the tamper evidence ring. May be prevented from rotating.

As the locking projection that can be displaced when it comes into contact with the locking claw when the cap is closed, the strength of the locking projection when it is displaced to the side opposite to one side surface is A cut may be provided so as to be smaller than the strength when displaced to the side surface side. Further, the locking projection of the cap is formed into a thin plate shape that can be undulated in the circumferential direction, and is adjacent to one side surface of the locking projection, and assists in preventing the displacement when the locking projection is displaced to the one side surface side. It may be provided with a protrusion.

In the closure device of the present invention, the tamper evidence ring portion of the cap may be provided with a vertical score for opening the tamper evidence ring portion in a band shape. Furthermore, the horizontal score provided on the tubular part of the cap,
It is also possible to form one wide bridge and a plurality of narrow bridges so as to partition the tubular portion and the tamper evidence ring portion, and to provide a vertical weakening line adjacent to the end portion of the wide bridge. good.

In the closing device of the present invention, the bridge breaking angle, which is the rotation angle up to the position where the bridge is cut by rotating the cap attached to the container mouth in the opening direction, is 90 degrees or less. desirable.

[0017]

In the closure device of the present invention, a plurality of locking claws projecting upward are provided in the flange portion of the container on the upper surface side of the flange portion of the container along the circumferential direction and the tamper evidence ring portion of the cap is provided. , A locking projection protruding toward the outer circumference in the radial direction is provided, and when the cap is attached to the container mouth, the locking projection of the cap is provided on the contact surface provided on the locking claw of the flange. When the cap is attached to the container mouth, the locking protrusion of the cap is the flange of the container because one side of the cap locks the rotation of the tamper evidence ring in the opening direction. When the cap attached to the container mouth is turned in the opening direction when it is tightened while overcoming the locking claw of the locking part, one side surface of the locking protrusion contacts the contact surface of the locking claw, and the tamper evidence ring part The rotation of the Rotational force turning the fruit cap unplugging direction acts on the bridge directly, bridge is easily cut.

Further, since the locking projection is provided so as to be displaceable when it comes into contact with the locking claw when the cap is closed, even if the locking projection comes into contact with the locking claw when the cap is closed, the locking projection is still formed. It is possible to displace and easily get over the locking claw, and by reducing the resistance force applied to the bridge at the time of closure, it is possible to prevent the inconvenience of cutting the bridge at the time of closure. When the cap is rotated in the opening direction, the locking projection is securely locked by the locking claw, and rotation of the tamper evidence ring part is prevented.

A plurality of locking claws are arranged at intervals on the upper surface of the flange portion of the container, and a plurality of locking projections are arranged at intervals on the outer wall of the tamper evidence ring portion of the cap. The force can be applied uniformly to the bridge, making it easy to cut the bridge, and rotating the cap attached to the container mouth in the opening direction, which is the rotation angle up to the position where the bridge is cut. Breaking angle (BBA) 90 degrees, preferably 45
It becomes possible to make it as small as or below.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. 1 and 2 show a first embodiment of a closing device according to the present invention, in which reference numeral 50 is a cap and 70 is a container. The cap 50 is made of a synthetic resin such as polypropylene. The container 70 is made of synthetic resin such as polyethylene terephthalate (PET). The container 70 is not limited to this embodiment and may be a glass container.

The cap 50 has a circular top plate portion 51.
And a cap main body 53 including a tubular portion 52 that hangs down from the peripheral edge of the top plate portion 51, and a thin liner 54 provided on the inner surface side of the top plate portion 51 of the cap main body 53. There is. The cylindrical portion 52 has a horizontal score of 5 with the horizontal score 56 leaving a plurality of thin bridges 55.
It is partitioned into a main part 57 above 6 and a tamper evidence ring part (hereinafter referred to as TE ring part) 58 below the horizontal score 56. On the inner wall surface of the main portion 57, a screw portion 59 that is screwed with a male screw 71 formed on the outer periphery of the mouth portion of the container 70 is formed. In addition, a tab 60 having a plate-like shape is formed on the inner wall surface of the TE ring portion 58 so as to be capable of undulating in the vertical direction, and the TE ring portion 58 below the tab 60 has an annular shape. Bead part 6
1 is formed.

On the outer wall surface of the TE ring portion 58, there are provided a plurality of plate-like locking projections 62 whose tips are inclined toward the cap opening direction.

In the container 70, a male screw 71 is formed on the outer periphery of the upper portion of the mouth 70a, a bulging step portion 72 that bulges in an annular shape is formed below the male screw 71, and a flange is formed on the lower neck portion. 73 is formed. A plurality of locking claws 74 are provided on the upper surface of the flange portion 73 at intervals in the circumferential direction. In these locking claws 74, the contact surface 74a on the side with which the one side surface 62a of the locking projection 62 contacts when the cap 50 is opened is formed into a vertical surface, and the opposite surface is directed inward in the radial direction of the flange portion. The inclined surface 74b has a reduced thickness.

A method of using the closing device according to this embodiment will be described. After the container 70 is filled with the desired content liquid,
The cap 50 is conveyed to a cap mounting device (not shown), supports the lower surface of the flange 73, and is preferably conveyed in a suspended state, while the cap 50 is screwed and fitted into the mouth portion 70a thereof.
Attach and seal.

When the cap 50 is attached to the container opening 70a, the locking projection 62 of the TE ring portion 58 has the locking claw 7 whose surface opposite to the one side surface 62a is provided on the flange 73.
4 is abutted against the inclined surface 74b and is pushed by the inclined surface 74b to be tilted slightly inward in the radial direction.
It is possible to easily get over the locking claw 74 along the surface of 4b. At this time, when the locking projection 62 is pushed by the inclined surface 74b, resistance is generated in the rotation of the TE ring portion 58 in the closing direction and force is applied to the bridge 55, but the locking projection 62 is previously moved in the cap opening direction. It is possible to avoid the inconvenience that the bridge 55 is cut at the time of cap closing by forming it so as to incline toward it and by appropriately setting the thickness of the locking projection 62 so that the bridge 55 is not cut at the time of cap closing. .

A cap 50 attached to the container opening 70a
As shown in FIG. 1 and FIG.
Is located between the locking claws 74 of the flange portion 73, and
The tab 60 on the inner wall surface of the E-ring portion 58 is located below the bulging step portion 72 and is erected so that the tip end of the tab 60 is brought into contact with the outer periphery of the container mouth portion 70a by the elastic force of the tab 60 itself.

The upper end and the outer peripheral surface of the container opening 70a are pressed against a liner 54 made of a soft resin provided on the inner surface of the top plate portion 51 of the cap 50, whereby the container 70 is sealed.

When the cap 50 of the closing device is opened, when the cap 50 attached to the container opening 70a is turned in the opening direction, the locking projections 62 provided on the outer wall surface of the TE ring portion 58 are released. Due to a slight rotational movement, one side surface 62a of the side surface 62a contacts the contact surface 74a of the locking claw 74 of the flange 73.
To prevent the TE ring portion 58 from rotating in the opening direction.

Since the main portion 57 of the cap 50 is rotated in the opening direction and the TE ring portion 58 is prevented from rotating, the plurality of thin bridges 55 connecting the main portion 57 and the TE ring portion 58 are As the main part 57 rotates, the main part 57 is rapidly pulled in the lateral direction and immediately cut. As a result, cap 5
The TE ring portion 58 is separated from the 0 main portion 57. When the bridge 55 is cut, the liner 54 is in contact with the upper end of the container opening 70a and the outer peripheral surface near the upper end, so that the container 70 is maintained hermetically sealed.

When the main part 57 of the cap 50 is further rotated in the opening direction, the liner 54 is separated from the upper end of the container mouth 70a and the outer peripheral surface near the upper end, and the hermetic seal of the container 70 is released, and the main part 57 is further opened. Turn to remove from container opening 70a.

When the cap 50 is opened, the locking projection 62 should pass over the contact surface 74a of the locking claw 74 and T
If the effect of preventing the rotation of the E-ring portion 58 is not obtained, the tab 60 protrudingly formed on the inner wall side of the TE ring portion abuts the lower surface of the bulging step portion 72 of the container opening portion 70a and bends downward. By contacting the bead portion 61, the rise of the TE ring portion 58 is prevented, and as a result, the bridge 55 is pulled and cut, and the TE ring portion 58 can be reliably separated.

In the closure device of this embodiment, the cap 50
TE ring portion 58 has a plurality of plate-shaped locking projections 62 on the outer wall surface.
Is provided, and a plurality of locking claws 74 projecting upward are provided on the upper surface of the flange portion 73 of the container 70. When the cap 50 is attached to the container mouth portion 70a and the cap is opened, the flange portion 73 is provided.
Of the cap 50 on the contact surface 74a provided on the locking claw 74 of
The one side surface 62a of the locking projection 62 is locked to prevent the TE ring portion 58 from rotating in the opening direction, so that the cap 50 mounted on the container opening 70a is rotated in the opening direction. The rotating force directly acts on the bridge 55, and the force can be uniformly applied to the plurality of bridges 55, and the bridge 55 can be easily cut at a small rotation angle. Therefore,
According to the closing device of this embodiment, the cap 50 attached to the container opening 70a is rotated in the opening direction to move the bridge 5
The bridge breaking angle (BBAA), which is the rotation angle up to the position where 5 is cut, can be reduced to 90 degrees or less, preferably 45 degrees or less.

FIGS. 3 and 4 show a second embodiment of the closing device according to the present invention. The closing device according to this embodiment has the same components as those of the first embodiment, and this embodiment will be described below. In the example, a plurality of locking protrusions 62 provided on the outer peripheral surface of the tamper evidence portion 58 of the cap 50 are provided with one side surface 6 of the base end portion.
It has a structure in which a cut 63 is provided on the side opposite to 2a.

The locking projection 62 having the cut 63 is
When the cap 50 is rotated in the closing direction and comes into contact with the inclined surface 74b of the locking claw 74 of the flange portion 73, the locking projection 62 is moved from the cut 63 toward the one side surface 62a as shown in FIG. It is easy to fall down. When the cap 50 attached to the container opening 70a is rotated in the opening direction, one side surface 62a of the locking projection 62 contacts the contact surface 74a of the locking claw 74. The locking projection 62 and the locking claw 74 are firmly engaged with each other to prevent the TE ring portion 58 from rotating in the opening direction without the projection 62 falling.

The closing device of this embodiment has a locking projection 62.
In addition, since the cut 63 is provided so that the tip easily falls toward the one side surface 62a, even if the locking projection 62 comes into contact with the locking claw 74 when the cap is closed, the locking projection 62 is displaced. It is possible to easily get over the locking claw 74 and reduce the resistance force applied to the bridge 55 at the time of closing the cap, so that the inconvenience of disconnecting the bridge at the time of closing the cap can be prevented.

FIG. 5 shows a third embodiment of the closing device according to the present invention. In this embodiment, a plurality of wings are provided on the outer peripheral surface of the TE ring portion 58 of the cap 50, the wings of which are inclined toward the cap closing direction. (Locking protrusion) 64 and auxiliary protrusion 6 for restricting the wing 64 from breaking in the cap closing direction
5 is provided.

The wing 64 is formed in a thin plate shape, and is set to have such strength that it can be bent relatively easily when it comes into contact with the locking claw 74 provided on the flange portion 73. Therefore, by turning the cap 50 in the closing direction, the container opening 70a
When the wing 64 comes into contact with the inclined surface 74b of the locking claw 74 during mounting, the wing 64 is easily pushed and bent inward in the radial direction and passes through the locking claw 74. Container mouth 7
When the cap 50 attached to 0a is rotated in the opening direction, the wings 64 are caught and pushed by the contact surfaces 74a of the locking claws 74, but immediately contact the auxiliary protrusions 65 to prevent bending, The wings 64 and the locking claws 74 are engaged with each other to prevent the TE ring portion 58 from rotating in the opening direction, and the bridge 55 is cut.

FIG. 6 shows a fourth embodiment of the closing device according to the present invention. The closure device according to this embodiment is configured with substantially the same components as the closure device of the previous embodiment. In this embodiment, the TE ring portion 58 of the cap 50 is provided.
Further, a vertical score 81 for opening the TE ring portion 58 in a band shape is provided. The vertical score 81 in this embodiment is provided so as to be connected to the horizontal score 56. In addition, among the plurality of bridges 55, the bridges 55 located on both sides of the vertical score 81 are replaced by other bridges 5.
It may be formed thicker than 5.

In the closing device according to this embodiment, the cap 50 can be attached to the container opening 70a and the cap 50 can be opened as in the previous embodiments, and the vertical score 81 is provided on the TE ring portion 58. As a result, the one side surface 62a of the locking projection 62 contacts the contact surface 74a of the locking claw 74 when the plug is opened, and the rotation of the TE ring portion 58 is blocked, so that the main portion 57 and the T ring portion 58 are prevented from rotating.
The bridge 55 connecting the E-ring portion 58 is cut off,
By cutting the bridge 55, the TE ring portion 58 is opened from the vertical score 81 to form a band shape, and the cap 50
Is cut from the main part 57 of the.

In the closing device of this embodiment, the TE ring portion 58 is provided with the vertical score 81, and the TE ring portion 58 is opened like a band when the cap is opened.
The ring portion 58 can be easily removed from the container mouth portion 70a, and the unsealing indication is further clarified, so that the tamper evidence of the closing device can be further improved. Further, since the TE ring portion 58 does not remain in the container mouth portion 70a and can be removed together with the cap 50, the container 70 and the cap 50 including the TE ring portion 58 can be easily separated even after use, and the container 70 It becomes easy to discard and reprocess the cap 50 and the cap 50.

In this embodiment, the horizontal score 56 of the cap 50 is partially formed as a wide bridge without being formed over the entire circumference in the circumferential direction of the cap, and the vertical score 81 or adjacent to one end of the wide bridge. A configuration in which a vertical weakening line is provided may be used. Here, the vertical weakening line has a structure in which the TE ring portion 58 is cut in the vertical direction while leaving an uncut portion that serves as a vertical bridge in the center or the end portion, or a thin connecting portion remains in the TE ring portion 58. As shown in FIG. Also,
When forming the wide bridge, two vertical weakening lines may be provided so as to be adjacent to both ends thereof. By thus providing the two vertical weakening lines adjacent to both ends of the wide bridge, the TE ring portion 58 is opened by breaking one of the vertical weakening lines, and then the other vertical weakening line is left. It can be easily torn from the main part 57 of the cap 50 along the weakening line.

It is needless to say that each of the above-mentioned embodiments exemplifies the closing device of the present invention, and various modifications can be made. For example, in each of the above embodiments, the liner is arranged on the inner surface of the top plate portion 51 of the cap main body 53, but a ridge or the like is provided on the inner surface side of the top plate portion to contact the upper end of the container mouth to provide airtightness. The linerless cap without the liner may be used. Further, in each of the above embodiments, the container 70 is a plastic container such as PET, but it may be a glass container.

[0043]

As described above, the closure device of the present invention is a composite having a container having a male screw formed at the mouth and a TE ring portion attached to the mouth of the container and separated from the main portion when the container is opened. A cap made of resin is provided on the upper surface side of the flange portion of the container, and a plurality of upwardly projecting locking claws are provided along the circumferential direction. A locking projection protruding toward the outer periphery is provided, and when the cap is mounted on the container mouth, one side surface of the locking projection of the cap is locked to the contact surface provided on the locking claw of the flange. The tamper evidence ring is prevented from rotating in the opening direction, so that when the cap attached to the container mouth is turned in the opening direction, one side of the locking projection is Abut the contact surface and Prevents rotation, rotational force to turn the results cap unplugging direction acts on the bridge directly, bridge is easily cut. Further, a plurality of locking claws are arranged at intervals on the upper surface of the flange portion of the container, and a plurality of locking protrusions are arranged at intervals on the outer wall of the TE ring portion of the cap, whereby the cap main portion and A force can be uniformly applied to the plurality of bridges that connect the TE ring portion, and the bridges can be easily cut at a small rotation angle. Therefore, according to the closing device of this embodiment, the cap attached to the container opening is rotated in the opening direction, and the bridge breaking angle (BBAA) is the rotation angle up to the position where the bridge is cut. Can be reduced to 90 degrees or less, preferably 45 degrees or less, and the difference between the seal release angle (SRA) and the bridge break angle (BBAA), SRAA- BBA = 0 or more,
It is extremely easy to set it to 30 degrees or more,
It is possible to provide a closing device having good tamper evidence.

Further, since the TE ring portion is provided with a vertical score or a vertical weakening line and the TE ring portion is opened like a band when the cap is opened, the TE ring portion can be easily removed from the container mouth portion. Thus, the unsealing indication becomes more clear, and the tamper evidence of the closing device can be further improved. Also, since the TE ring part does not remain in the container mouth part and can be removed together with the cap,
Even after use, the container and the cap including the TE ring portion can be easily separated, and the container and the cap can be easily discarded and reprocessed.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a first embodiment of a closing device of the present invention.

2 shows a closure device of the same embodiment, II in FIG.
It is a II sectional view.

FIG. 3 is a plan view of an essential part showing a second embodiment of the closing device of the present invention.

FIG. 4 is a plan view of relevant parts showing a closed state of the closing device of the same embodiment.

FIG. 5 is a front view of the main parts of a third embodiment of the closing device according to the present invention.

FIG. 6 is a front view of essential parts showing a fourth embodiment of the closing device of the present invention.

FIG. 7 is a perspective view showing an example of a conventional closing device.

FIG. 8 is a partially sectional front view showing another example of the conventional closing device.

9 is a perspective view of a main part of the closing device shown in FIG.

[Explanation of symbols]

50 ... Cap, 51 ... Top plate part, 52 ... Cylinder part, 5
3 ... Cap body, 54 ... Liner, 55 ... Bridge, 56 ... Horizontal score, 57 ... Main part, 58 ... T
E-ring part (tamper evidence ring part), 59 ……
Screw part, 60 ... Tab, 60a ... One side face, 61 ... Bead part, 62 ... Locking protrusion, 63 ... Break, 64 ...
Wing, 65 ... Auxiliary protrusion, 70 ... Container, 70a ...
… Container mouth, 71 …… Male thread, 72 …… Swelling step, 73
...... Flange part, 74 …… Locking claw, 74a …… Abutting surface,
74b ... inclined surface, 81 ... vertical score.

Claims (8)

[Claims] 1. A container having a screw part formed on the outer periphery of a mouth part and a flange part formed on a neck part, a top plate part and a tube part hanging down from the periphery thereof, and a plurality of bridges provided at the lower part of the tube part. A closure device comprising a tamper evidence ring section partitioned by a horizontal score, and a cap provided with a threaded section that engages with the threaded section of the container on the inner surface of the tubular section. A plurality of locking claws projecting upward are provided on the upper surface side of the part along the circumferential direction, and a locking protrusion projecting radially outward is formed on the outer peripheral surface of the tamper evidence ring part of the cap. When the cap is attached to the container mouth, one side of the cap protrusion of the cap engages with the abutment surface provided on the engagement claw of the flange to open the tamper evidence ring. What Closure device being characterized in that a structure in which rotation is prevented. 2. The locking claw provided on the flange portion of the container is characterized in that the surface opposite to the contact surface is an inclined surface that gradually increases the protrusion height toward the cap closing direction. Clause 1 closure device. 3. The locking projection of the cap is displaced inward in the radial direction when it comes into contact with a locking claw provided on a flange of the container when the cap is rotated around the container opening part in the closing direction and mounted. When the cap with the container mouth is turned in the opening direction, the locking projection of the cap is locked on the contact surface of the locking claw to prevent the tamper evidence ring from rotating in the opening direction. The method according to claim 1 or 2, characterized in that
Closure device. 4. The locking projection of the cap is configured so that the strength when the locking projection is displaced to the side opposite to the one side surface is smaller than the strength when the locking projection is displaced to the one side surface. The closing device according to claim 3, wherein a break is provided. 5. The locking projection of the cap is formed into a thin plate shape that can be undulated in the circumferential direction, and is adjacent to one side surface of the locking projection,
The closing device according to claim 3, wherein an auxiliary protrusion is provided to prevent the engagement protrusion from being displaced when the engagement protrusion is displaced to one side surface side. 6. The closure device according to claim 1, wherein the tamper evidence ring portion of the cap is provided with a vertical score for opening the tamper evidence ring portion in a band shape. 7. The horizontal score provided on the tubular portion of the cap is formed so as to partition the tubular portion and the tamper evidence ring portion, leaving one wide bridge and a plurality of bridges, and the wide bridge is provided. Adjacent to the end of
6. A vertical weakening line for opening the tamper evidence ring portion in a band shape is provided.
One of the closing devices. 8. The bridge breaking angle, which is the rotation angle up to the position where the bridge is cut by rotating the cap attached to the container mouth in the opening direction, is 90 degrees or less. Closure device according to any one of 7 to 7.